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8d725fac AF |
1 | /* |
2 | * QEMU float support | |
3 | * | |
16017c48 PM |
4 | * The code in this source file is derived from release 2a of the SoftFloat |
5 | * IEC/IEEE Floating-point Arithmetic Package. Those parts of the code (and | |
6 | * some later contributions) are provided under that license, as detailed below. | |
7 | * It has subsequently been modified by contributors to the QEMU Project, | |
8 | * so some portions are provided under: | |
9 | * the SoftFloat-2a license | |
10 | * the BSD license | |
11 | * GPL-v2-or-later | |
12 | * | |
13 | * Any future contributions to this file after December 1st 2014 will be | |
14 | * taken to be licensed under the Softfloat-2a license unless specifically | |
15 | * indicated otherwise. | |
8d725fac | 16 | */ |
158142c2 | 17 | |
a7d1ac78 PM |
18 | /* |
19 | =============================================================================== | |
20 | This C source file is part of the SoftFloat IEC/IEEE Floating-point | |
21 | Arithmetic Package, Release 2a. | |
158142c2 FB |
22 | |
23 | Written by John R. Hauser. This work was made possible in part by the | |
24 | International Computer Science Institute, located at Suite 600, 1947 Center | |
25 | Street, Berkeley, California 94704. Funding was partially provided by the | |
26 | National Science Foundation under grant MIP-9311980. The original version | |
27 | of this code was written as part of a project to build a fixed-point vector | |
28 | processor in collaboration with the University of California at Berkeley, | |
29 | overseen by Profs. Nelson Morgan and John Wawrzynek. More information | |
a7d1ac78 | 30 | is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/ |
158142c2 FB |
31 | arithmetic/SoftFloat.html'. |
32 | ||
a7d1ac78 PM |
33 | THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort |
34 | has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT | |
35 | TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO | |
36 | PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY | |
37 | AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. | |
158142c2 FB |
38 | |
39 | Derivative works are acceptable, even for commercial purposes, so long as | |
a7d1ac78 PM |
40 | (1) they include prominent notice that the work is derivative, and (2) they |
41 | include prominent notice akin to these four paragraphs for those parts of | |
42 | this code that are retained. | |
158142c2 | 43 | |
a7d1ac78 PM |
44 | =============================================================================== |
45 | */ | |
158142c2 | 46 | |
16017c48 PM |
47 | /* BSD licensing: |
48 | * Copyright (c) 2006, Fabrice Bellard | |
49 | * All rights reserved. | |
50 | * | |
51 | * Redistribution and use in source and binary forms, with or without | |
52 | * modification, are permitted provided that the following conditions are met: | |
53 | * | |
54 | * 1. Redistributions of source code must retain the above copyright notice, | |
55 | * this list of conditions and the following disclaimer. | |
56 | * | |
57 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
58 | * this list of conditions and the following disclaimer in the documentation | |
59 | * and/or other materials provided with the distribution. | |
60 | * | |
61 | * 3. Neither the name of the copyright holder nor the names of its contributors | |
62 | * may be used to endorse or promote products derived from this software without | |
63 | * specific prior written permission. | |
64 | * | |
65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
66 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
67 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
68 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
69 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
70 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
71 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
72 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
73 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
74 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
75 | * THE POSSIBILITY OF SUCH DAMAGE. | |
76 | */ | |
77 | ||
78 | /* Portions of this work are licensed under the terms of the GNU GPL, | |
79 | * version 2 or later. See the COPYING file in the top-level directory. | |
80 | */ | |
81 | ||
2ac8bd03 PM |
82 | /* softfloat (and in particular the code in softfloat-specialize.h) is |
83 | * target-dependent and needs the TARGET_* macros. | |
84 | */ | |
d38ea87a | 85 | #include "qemu/osdep.h" |
a94b7839 | 86 | #include <math.h> |
6fff2167 | 87 | #include "qemu/bitops.h" |
6b4c305c | 88 | #include "fpu/softfloat.h" |
158142c2 | 89 | |
dc355b76 | 90 | /* We only need stdlib for abort() */ |
dc355b76 | 91 | |
158142c2 FB |
92 | /*---------------------------------------------------------------------------- |
93 | | Primitive arithmetic functions, including multi-word arithmetic, and | |
94 | | division and square root approximations. (Can be specialized to target if | |
95 | | desired.) | |
96 | *----------------------------------------------------------------------------*/ | |
88857aca | 97 | #include "fpu/softfloat-macros.h" |
158142c2 | 98 | |
a94b7839 EC |
99 | /* |
100 | * Hardfloat | |
101 | * | |
102 | * Fast emulation of guest FP instructions is challenging for two reasons. | |
103 | * First, FP instruction semantics are similar but not identical, particularly | |
104 | * when handling NaNs. Second, emulating at reasonable speed the guest FP | |
105 | * exception flags is not trivial: reading the host's flags register with a | |
106 | * feclearexcept & fetestexcept pair is slow [slightly slower than soft-fp], | |
107 | * and trapping on every FP exception is not fast nor pleasant to work with. | |
108 | * | |
109 | * We address these challenges by leveraging the host FPU for a subset of the | |
110 | * operations. To do this we expand on the idea presented in this paper: | |
111 | * | |
112 | * Guo, Yu-Chuan, et al. "Translating the ARM Neon and VFP instructions in a | |
113 | * binary translator." Software: Practice and Experience 46.12 (2016):1591-1615. | |
114 | * | |
115 | * The idea is thus to leverage the host FPU to (1) compute FP operations | |
116 | * and (2) identify whether FP exceptions occurred while avoiding | |
117 | * expensive exception flag register accesses. | |
118 | * | |
119 | * An important optimization shown in the paper is that given that exception | |
120 | * flags are rarely cleared by the guest, we can avoid recomputing some flags. | |
121 | * This is particularly useful for the inexact flag, which is very frequently | |
122 | * raised in floating-point workloads. | |
123 | * | |
124 | * We optimize the code further by deferring to soft-fp whenever FP exception | |
125 | * detection might get hairy. Two examples: (1) when at least one operand is | |
126 | * denormal/inf/NaN; (2) when operands are not guaranteed to lead to a 0 result | |
127 | * and the result is < the minimum normal. | |
128 | */ | |
129 | #define GEN_INPUT_FLUSH__NOCHECK(name, soft_t) \ | |
130 | static inline void name(soft_t *a, float_status *s) \ | |
131 | { \ | |
132 | if (unlikely(soft_t ## _is_denormal(*a))) { \ | |
133 | *a = soft_t ## _set_sign(soft_t ## _zero, \ | |
134 | soft_t ## _is_neg(*a)); \ | |
d82f3b2d | 135 | float_raise(float_flag_input_denormal, s); \ |
a94b7839 EC |
136 | } \ |
137 | } | |
138 | ||
139 | GEN_INPUT_FLUSH__NOCHECK(float32_input_flush__nocheck, float32) | |
140 | GEN_INPUT_FLUSH__NOCHECK(float64_input_flush__nocheck, float64) | |
141 | #undef GEN_INPUT_FLUSH__NOCHECK | |
142 | ||
143 | #define GEN_INPUT_FLUSH1(name, soft_t) \ | |
144 | static inline void name(soft_t *a, float_status *s) \ | |
145 | { \ | |
146 | if (likely(!s->flush_inputs_to_zero)) { \ | |
147 | return; \ | |
148 | } \ | |
149 | soft_t ## _input_flush__nocheck(a, s); \ | |
150 | } | |
151 | ||
152 | GEN_INPUT_FLUSH1(float32_input_flush1, float32) | |
153 | GEN_INPUT_FLUSH1(float64_input_flush1, float64) | |
154 | #undef GEN_INPUT_FLUSH1 | |
155 | ||
156 | #define GEN_INPUT_FLUSH2(name, soft_t) \ | |
157 | static inline void name(soft_t *a, soft_t *b, float_status *s) \ | |
158 | { \ | |
159 | if (likely(!s->flush_inputs_to_zero)) { \ | |
160 | return; \ | |
161 | } \ | |
162 | soft_t ## _input_flush__nocheck(a, s); \ | |
163 | soft_t ## _input_flush__nocheck(b, s); \ | |
164 | } | |
165 | ||
166 | GEN_INPUT_FLUSH2(float32_input_flush2, float32) | |
167 | GEN_INPUT_FLUSH2(float64_input_flush2, float64) | |
168 | #undef GEN_INPUT_FLUSH2 | |
169 | ||
170 | #define GEN_INPUT_FLUSH3(name, soft_t) \ | |
171 | static inline void name(soft_t *a, soft_t *b, soft_t *c, float_status *s) \ | |
172 | { \ | |
173 | if (likely(!s->flush_inputs_to_zero)) { \ | |
174 | return; \ | |
175 | } \ | |
176 | soft_t ## _input_flush__nocheck(a, s); \ | |
177 | soft_t ## _input_flush__nocheck(b, s); \ | |
178 | soft_t ## _input_flush__nocheck(c, s); \ | |
179 | } | |
180 | ||
181 | GEN_INPUT_FLUSH3(float32_input_flush3, float32) | |
182 | GEN_INPUT_FLUSH3(float64_input_flush3, float64) | |
183 | #undef GEN_INPUT_FLUSH3 | |
184 | ||
185 | /* | |
186 | * Choose whether to use fpclassify or float32/64_* primitives in the generated | |
187 | * hardfloat functions. Each combination of number of inputs and float size | |
188 | * gets its own value. | |
189 | */ | |
190 | #if defined(__x86_64__) | |
191 | # define QEMU_HARDFLOAT_1F32_USE_FP 0 | |
192 | # define QEMU_HARDFLOAT_1F64_USE_FP 1 | |
193 | # define QEMU_HARDFLOAT_2F32_USE_FP 0 | |
194 | # define QEMU_HARDFLOAT_2F64_USE_FP 1 | |
195 | # define QEMU_HARDFLOAT_3F32_USE_FP 0 | |
196 | # define QEMU_HARDFLOAT_3F64_USE_FP 1 | |
197 | #else | |
198 | # define QEMU_HARDFLOAT_1F32_USE_FP 0 | |
199 | # define QEMU_HARDFLOAT_1F64_USE_FP 0 | |
200 | # define QEMU_HARDFLOAT_2F32_USE_FP 0 | |
201 | # define QEMU_HARDFLOAT_2F64_USE_FP 0 | |
202 | # define QEMU_HARDFLOAT_3F32_USE_FP 0 | |
203 | # define QEMU_HARDFLOAT_3F64_USE_FP 0 | |
204 | #endif | |
205 | ||
206 | /* | |
207 | * QEMU_HARDFLOAT_USE_ISINF chooses whether to use isinf() over | |
208 | * float{32,64}_is_infinity when !USE_FP. | |
209 | * On x86_64/aarch64, using the former over the latter can yield a ~6% speedup. | |
210 | * On power64 however, using isinf() reduces fp-bench performance by up to 50%. | |
211 | */ | |
212 | #if defined(__x86_64__) || defined(__aarch64__) | |
213 | # define QEMU_HARDFLOAT_USE_ISINF 1 | |
214 | #else | |
215 | # define QEMU_HARDFLOAT_USE_ISINF 0 | |
216 | #endif | |
217 | ||
218 | /* | |
219 | * Some targets clear the FP flags before most FP operations. This prevents | |
220 | * the use of hardfloat, since hardfloat relies on the inexact flag being | |
221 | * already set. | |
222 | */ | |
223 | #if defined(TARGET_PPC) || defined(__FAST_MATH__) | |
224 | # if defined(__FAST_MATH__) | |
225 | # warning disabling hardfloat due to -ffast-math: hardfloat requires an exact \ | |
226 | IEEE implementation | |
227 | # endif | |
228 | # define QEMU_NO_HARDFLOAT 1 | |
229 | # define QEMU_SOFTFLOAT_ATTR QEMU_FLATTEN | |
230 | #else | |
231 | # define QEMU_NO_HARDFLOAT 0 | |
232 | # define QEMU_SOFTFLOAT_ATTR QEMU_FLATTEN __attribute__((noinline)) | |
233 | #endif | |
234 | ||
235 | static inline bool can_use_fpu(const float_status *s) | |
236 | { | |
237 | if (QEMU_NO_HARDFLOAT) { | |
238 | return false; | |
239 | } | |
240 | return likely(s->float_exception_flags & float_flag_inexact && | |
241 | s->float_rounding_mode == float_round_nearest_even); | |
242 | } | |
243 | ||
244 | /* | |
245 | * Hardfloat generation functions. Each operation can have two flavors: | |
246 | * either using softfloat primitives (e.g. float32_is_zero_or_normal) for | |
247 | * most condition checks, or native ones (e.g. fpclassify). | |
248 | * | |
249 | * The flavor is chosen by the callers. Instead of using macros, we rely on the | |
250 | * compiler to propagate constants and inline everything into the callers. | |
251 | * | |
252 | * We only generate functions for operations with two inputs, since only | |
253 | * these are common enough to justify consolidating them into common code. | |
254 | */ | |
255 | ||
256 | typedef union { | |
257 | float32 s; | |
258 | float h; | |
259 | } union_float32; | |
260 | ||
261 | typedef union { | |
262 | float64 s; | |
263 | double h; | |
264 | } union_float64; | |
265 | ||
266 | typedef bool (*f32_check_fn)(union_float32 a, union_float32 b); | |
267 | typedef bool (*f64_check_fn)(union_float64 a, union_float64 b); | |
268 | ||
269 | typedef float32 (*soft_f32_op2_fn)(float32 a, float32 b, float_status *s); | |
270 | typedef float64 (*soft_f64_op2_fn)(float64 a, float64 b, float_status *s); | |
271 | typedef float (*hard_f32_op2_fn)(float a, float b); | |
272 | typedef double (*hard_f64_op2_fn)(double a, double b); | |
273 | ||
274 | /* 2-input is-zero-or-normal */ | |
275 | static inline bool f32_is_zon2(union_float32 a, union_float32 b) | |
276 | { | |
277 | if (QEMU_HARDFLOAT_2F32_USE_FP) { | |
278 | /* | |
279 | * Not using a temp variable for consecutive fpclassify calls ends up | |
280 | * generating faster code. | |
281 | */ | |
282 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
283 | (fpclassify(b.h) == FP_NORMAL || fpclassify(b.h) == FP_ZERO); | |
284 | } | |
285 | return float32_is_zero_or_normal(a.s) && | |
286 | float32_is_zero_or_normal(b.s); | |
287 | } | |
288 | ||
289 | static inline bool f64_is_zon2(union_float64 a, union_float64 b) | |
290 | { | |
291 | if (QEMU_HARDFLOAT_2F64_USE_FP) { | |
292 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
293 | (fpclassify(b.h) == FP_NORMAL || fpclassify(b.h) == FP_ZERO); | |
294 | } | |
295 | return float64_is_zero_or_normal(a.s) && | |
296 | float64_is_zero_or_normal(b.s); | |
297 | } | |
298 | ||
299 | /* 3-input is-zero-or-normal */ | |
300 | static inline | |
301 | bool f32_is_zon3(union_float32 a, union_float32 b, union_float32 c) | |
302 | { | |
303 | if (QEMU_HARDFLOAT_3F32_USE_FP) { | |
304 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
305 | (fpclassify(b.h) == FP_NORMAL || fpclassify(b.h) == FP_ZERO) && | |
306 | (fpclassify(c.h) == FP_NORMAL || fpclassify(c.h) == FP_ZERO); | |
307 | } | |
308 | return float32_is_zero_or_normal(a.s) && | |
309 | float32_is_zero_or_normal(b.s) && | |
310 | float32_is_zero_or_normal(c.s); | |
311 | } | |
312 | ||
313 | static inline | |
314 | bool f64_is_zon3(union_float64 a, union_float64 b, union_float64 c) | |
315 | { | |
316 | if (QEMU_HARDFLOAT_3F64_USE_FP) { | |
317 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
318 | (fpclassify(b.h) == FP_NORMAL || fpclassify(b.h) == FP_ZERO) && | |
319 | (fpclassify(c.h) == FP_NORMAL || fpclassify(c.h) == FP_ZERO); | |
320 | } | |
321 | return float64_is_zero_or_normal(a.s) && | |
322 | float64_is_zero_or_normal(b.s) && | |
323 | float64_is_zero_or_normal(c.s); | |
324 | } | |
325 | ||
326 | static inline bool f32_is_inf(union_float32 a) | |
327 | { | |
328 | if (QEMU_HARDFLOAT_USE_ISINF) { | |
329 | return isinf(a.h); | |
330 | } | |
331 | return float32_is_infinity(a.s); | |
332 | } | |
333 | ||
334 | static inline bool f64_is_inf(union_float64 a) | |
335 | { | |
336 | if (QEMU_HARDFLOAT_USE_ISINF) { | |
337 | return isinf(a.h); | |
338 | } | |
339 | return float64_is_infinity(a.s); | |
340 | } | |
341 | ||
a94b7839 EC |
342 | static inline float32 |
343 | float32_gen2(float32 xa, float32 xb, float_status *s, | |
344 | hard_f32_op2_fn hard, soft_f32_op2_fn soft, | |
b240c9c4 | 345 | f32_check_fn pre, f32_check_fn post) |
a94b7839 EC |
346 | { |
347 | union_float32 ua, ub, ur; | |
348 | ||
349 | ua.s = xa; | |
350 | ub.s = xb; | |
351 | ||
352 | if (unlikely(!can_use_fpu(s))) { | |
353 | goto soft; | |
354 | } | |
355 | ||
356 | float32_input_flush2(&ua.s, &ub.s, s); | |
357 | if (unlikely(!pre(ua, ub))) { | |
358 | goto soft; | |
359 | } | |
a94b7839 EC |
360 | |
361 | ur.h = hard(ua.h, ub.h); | |
362 | if (unlikely(f32_is_inf(ur))) { | |
d82f3b2d | 363 | float_raise(float_flag_overflow, s); |
b240c9c4 RH |
364 | } else if (unlikely(fabsf(ur.h) <= FLT_MIN) && post(ua, ub)) { |
365 | goto soft; | |
a94b7839 EC |
366 | } |
367 | return ur.s; | |
368 | ||
369 | soft: | |
370 | return soft(ua.s, ub.s, s); | |
371 | } | |
372 | ||
373 | static inline float64 | |
374 | float64_gen2(float64 xa, float64 xb, float_status *s, | |
375 | hard_f64_op2_fn hard, soft_f64_op2_fn soft, | |
b240c9c4 | 376 | f64_check_fn pre, f64_check_fn post) |
a94b7839 EC |
377 | { |
378 | union_float64 ua, ub, ur; | |
379 | ||
380 | ua.s = xa; | |
381 | ub.s = xb; | |
382 | ||
383 | if (unlikely(!can_use_fpu(s))) { | |
384 | goto soft; | |
385 | } | |
386 | ||
387 | float64_input_flush2(&ua.s, &ub.s, s); | |
388 | if (unlikely(!pre(ua, ub))) { | |
389 | goto soft; | |
390 | } | |
a94b7839 EC |
391 | |
392 | ur.h = hard(ua.h, ub.h); | |
393 | if (unlikely(f64_is_inf(ur))) { | |
d82f3b2d | 394 | float_raise(float_flag_overflow, s); |
b240c9c4 RH |
395 | } else if (unlikely(fabs(ur.h) <= DBL_MIN) && post(ua, ub)) { |
396 | goto soft; | |
a94b7839 EC |
397 | } |
398 | return ur.s; | |
399 | ||
400 | soft: | |
401 | return soft(ua.s, ub.s, s); | |
402 | } | |
403 | ||
d97544c9 AB |
404 | /*---------------------------------------------------------------------------- |
405 | | Returns the fraction bits of the single-precision floating-point value `a'. | |
406 | *----------------------------------------------------------------------------*/ | |
407 | ||
408 | static inline uint32_t extractFloat32Frac(float32 a) | |
409 | { | |
410 | return float32_val(a) & 0x007FFFFF; | |
411 | } | |
412 | ||
413 | /*---------------------------------------------------------------------------- | |
414 | | Returns the exponent bits of the single-precision floating-point value `a'. | |
415 | *----------------------------------------------------------------------------*/ | |
416 | ||
417 | static inline int extractFloat32Exp(float32 a) | |
418 | { | |
419 | return (float32_val(a) >> 23) & 0xFF; | |
420 | } | |
421 | ||
422 | /*---------------------------------------------------------------------------- | |
423 | | Returns the sign bit of the single-precision floating-point value `a'. | |
424 | *----------------------------------------------------------------------------*/ | |
425 | ||
c120391c | 426 | static inline bool extractFloat32Sign(float32 a) |
d97544c9 AB |
427 | { |
428 | return float32_val(a) >> 31; | |
429 | } | |
430 | ||
431 | /*---------------------------------------------------------------------------- | |
432 | | Returns the fraction bits of the double-precision floating-point value `a'. | |
433 | *----------------------------------------------------------------------------*/ | |
434 | ||
435 | static inline uint64_t extractFloat64Frac(float64 a) | |
436 | { | |
e9321124 | 437 | return float64_val(a) & UINT64_C(0x000FFFFFFFFFFFFF); |
d97544c9 AB |
438 | } |
439 | ||
440 | /*---------------------------------------------------------------------------- | |
441 | | Returns the exponent bits of the double-precision floating-point value `a'. | |
442 | *----------------------------------------------------------------------------*/ | |
443 | ||
444 | static inline int extractFloat64Exp(float64 a) | |
445 | { | |
446 | return (float64_val(a) >> 52) & 0x7FF; | |
447 | } | |
448 | ||
449 | /*---------------------------------------------------------------------------- | |
450 | | Returns the sign bit of the double-precision floating-point value `a'. | |
451 | *----------------------------------------------------------------------------*/ | |
452 | ||
c120391c | 453 | static inline bool extractFloat64Sign(float64 a) |
d97544c9 AB |
454 | { |
455 | return float64_val(a) >> 63; | |
456 | } | |
457 | ||
a90119b5 AB |
458 | /* |
459 | * Classify a floating point number. Everything above float_class_qnan | |
460 | * is a NaN so cls >= float_class_qnan is any NaN. | |
461 | */ | |
462 | ||
463 | typedef enum __attribute__ ((__packed__)) { | |
464 | float_class_unclassified, | |
465 | float_class_zero, | |
466 | float_class_normal, | |
467 | float_class_inf, | |
468 | float_class_qnan, /* all NaNs from here */ | |
469 | float_class_snan, | |
a90119b5 AB |
470 | } FloatClass; |
471 | ||
134eda00 RH |
472 | #define float_cmask(bit) (1u << (bit)) |
473 | ||
474 | enum { | |
475 | float_cmask_zero = float_cmask(float_class_zero), | |
476 | float_cmask_normal = float_cmask(float_class_normal), | |
477 | float_cmask_inf = float_cmask(float_class_inf), | |
478 | float_cmask_qnan = float_cmask(float_class_qnan), | |
479 | float_cmask_snan = float_cmask(float_class_snan), | |
480 | ||
481 | float_cmask_infzero = float_cmask_zero | float_cmask_inf, | |
482 | float_cmask_anynan = float_cmask_qnan | float_cmask_snan, | |
483 | }; | |
484 | ||
e1c4667a RH |
485 | /* Flags for parts_minmax. */ |
486 | enum { | |
487 | /* Set for minimum; clear for maximum. */ | |
488 | minmax_ismin = 1, | |
489 | /* Set for the IEEE 754-2008 minNum() and maxNum() operations. */ | |
490 | minmax_isnum = 2, | |
491 | /* Set for the IEEE 754-2008 minNumMag() and minNumMag() operations. */ | |
492 | minmax_ismag = 4, | |
493 | }; | |
134eda00 | 494 | |
247d1f21 RH |
495 | /* Simple helpers for checking if, or what kind of, NaN we have */ |
496 | static inline __attribute__((unused)) bool is_nan(FloatClass c) | |
497 | { | |
498 | return unlikely(c >= float_class_qnan); | |
499 | } | |
500 | ||
501 | static inline __attribute__((unused)) bool is_snan(FloatClass c) | |
502 | { | |
503 | return c == float_class_snan; | |
504 | } | |
505 | ||
506 | static inline __attribute__((unused)) bool is_qnan(FloatClass c) | |
507 | { | |
508 | return c == float_class_qnan; | |
509 | } | |
510 | ||
a90119b5 | 511 | /* |
0018b1f4 RH |
512 | * Structure holding all of the decomposed parts of a float. |
513 | * The exponent is unbiased and the fraction is normalized. | |
a90119b5 | 514 | * |
0018b1f4 RH |
515 | * The fraction words are stored in big-endian word ordering, |
516 | * so that truncation from a larger format to a smaller format | |
517 | * can be done simply by ignoring subsequent elements. | |
a90119b5 AB |
518 | */ |
519 | ||
520 | typedef struct { | |
a90119b5 AB |
521 | FloatClass cls; |
522 | bool sign; | |
4109b9ea RH |
523 | int32_t exp; |
524 | union { | |
525 | /* Routines that know the structure may reference the singular name. */ | |
526 | uint64_t frac; | |
527 | /* | |
528 | * Routines expanded with multiple structures reference "hi" and "lo" | |
529 | * depending on the operation. In FloatParts64, "hi" and "lo" are | |
530 | * both the same word and aliased here. | |
531 | */ | |
532 | uint64_t frac_hi; | |
533 | uint64_t frac_lo; | |
534 | }; | |
f8155c1d | 535 | } FloatParts64; |
a90119b5 | 536 | |
0018b1f4 RH |
537 | typedef struct { |
538 | FloatClass cls; | |
539 | bool sign; | |
540 | int32_t exp; | |
541 | uint64_t frac_hi; | |
542 | uint64_t frac_lo; | |
543 | } FloatParts128; | |
544 | ||
aca84527 RH |
545 | typedef struct { |
546 | FloatClass cls; | |
547 | bool sign; | |
548 | int32_t exp; | |
549 | uint64_t frac_hi; | |
550 | uint64_t frac_hm; /* high-middle */ | |
551 | uint64_t frac_lm; /* low-middle */ | |
552 | uint64_t frac_lo; | |
553 | } FloatParts256; | |
554 | ||
0018b1f4 | 555 | /* These apply to the most significant word of each FloatPartsN. */ |
e99c4373 | 556 | #define DECOMPOSED_BINARY_POINT 63 |
a90119b5 | 557 | #define DECOMPOSED_IMPLICIT_BIT (1ull << DECOMPOSED_BINARY_POINT) |
a90119b5 AB |
558 | |
559 | /* Structure holding all of the relevant parameters for a format. | |
560 | * exp_size: the size of the exponent field | |
561 | * exp_bias: the offset applied to the exponent field | |
562 | * exp_max: the maximum normalised exponent | |
563 | * frac_size: the size of the fraction field | |
564 | * frac_shift: shift to normalise the fraction with DECOMPOSED_BINARY_POINT | |
565 | * The following are computed based the size of fraction | |
d6e1f0cd | 566 | * round_mask: bits below lsb which must be rounded |
ca3a3d5a AB |
567 | * The following optional modifiers are available: |
568 | * arm_althp: handle ARM Alternative Half Precision | |
a90119b5 AB |
569 | */ |
570 | typedef struct { | |
571 | int exp_size; | |
572 | int exp_bias; | |
573 | int exp_max; | |
574 | int frac_size; | |
575 | int frac_shift; | |
ca3a3d5a | 576 | bool arm_althp; |
d6e1f0cd | 577 | uint64_t round_mask; |
a90119b5 AB |
578 | } FloatFmt; |
579 | ||
580 | /* Expand fields based on the size of exponent and fraction */ | |
d6e1f0cd RH |
581 | #define FLOAT_PARAMS_(E, F) \ |
582 | .exp_size = E, \ | |
583 | .exp_bias = ((1 << E) - 1) >> 1, \ | |
584 | .exp_max = (1 << E) - 1, \ | |
585 | .frac_size = F | |
586 | ||
587 | #define FLOAT_PARAMS(E, F) \ | |
588 | FLOAT_PARAMS_(E, F), \ | |
589 | .frac_shift = (-F - 1) & 63, \ | |
590 | .round_mask = (1ull << ((-F - 1) & 63)) - 1 | |
a90119b5 AB |
591 | |
592 | static const FloatFmt float16_params = { | |
593 | FLOAT_PARAMS(5, 10) | |
594 | }; | |
595 | ||
6fed16b2 AB |
596 | static const FloatFmt float16_params_ahp = { |
597 | FLOAT_PARAMS(5, 10), | |
598 | .arm_althp = true | |
599 | }; | |
600 | ||
8282310d LZ |
601 | static const FloatFmt bfloat16_params = { |
602 | FLOAT_PARAMS(8, 7) | |
603 | }; | |
604 | ||
a90119b5 AB |
605 | static const FloatFmt float32_params = { |
606 | FLOAT_PARAMS(8, 23) | |
607 | }; | |
608 | ||
609 | static const FloatFmt float64_params = { | |
610 | FLOAT_PARAMS(11, 52) | |
611 | }; | |
612 | ||
0018b1f4 RH |
613 | static const FloatFmt float128_params = { |
614 | FLOAT_PARAMS(15, 112) | |
615 | }; | |
616 | ||
6fff2167 | 617 | /* Unpack a float to parts, but do not canonicalize. */ |
d8fdd172 | 618 | static void unpack_raw64(FloatParts64 *r, const FloatFmt *fmt, uint64_t raw) |
6fff2167 | 619 | { |
d8fdd172 RH |
620 | const int f_size = fmt->frac_size; |
621 | const int e_size = fmt->exp_size; | |
6fff2167 | 622 | |
d8fdd172 | 623 | *r = (FloatParts64) { |
6fff2167 | 624 | .cls = float_class_unclassified, |
d8fdd172 RH |
625 | .sign = extract64(raw, f_size + e_size, 1), |
626 | .exp = extract64(raw, f_size, e_size), | |
627 | .frac = extract64(raw, 0, f_size) | |
6fff2167 AB |
628 | }; |
629 | } | |
630 | ||
3dddb203 | 631 | static inline void float16_unpack_raw(FloatParts64 *p, float16 f) |
6fff2167 | 632 | { |
3dddb203 | 633 | unpack_raw64(p, &float16_params, f); |
6fff2167 AB |
634 | } |
635 | ||
3dddb203 | 636 | static inline void bfloat16_unpack_raw(FloatParts64 *p, bfloat16 f) |
8282310d | 637 | { |
3dddb203 | 638 | unpack_raw64(p, &bfloat16_params, f); |
8282310d LZ |
639 | } |
640 | ||
3dddb203 | 641 | static inline void float32_unpack_raw(FloatParts64 *p, float32 f) |
6fff2167 | 642 | { |
3dddb203 | 643 | unpack_raw64(p, &float32_params, f); |
6fff2167 AB |
644 | } |
645 | ||
3dddb203 | 646 | static inline void float64_unpack_raw(FloatParts64 *p, float64 f) |
6fff2167 | 647 | { |
3dddb203 | 648 | unpack_raw64(p, &float64_params, f); |
6fff2167 AB |
649 | } |
650 | ||
0018b1f4 RH |
651 | static void float128_unpack_raw(FloatParts128 *p, float128 f) |
652 | { | |
653 | const int f_size = float128_params.frac_size - 64; | |
654 | const int e_size = float128_params.exp_size; | |
655 | ||
656 | *p = (FloatParts128) { | |
657 | .cls = float_class_unclassified, | |
658 | .sign = extract64(f.high, f_size + e_size, 1), | |
659 | .exp = extract64(f.high, f_size, e_size), | |
660 | .frac_hi = extract64(f.high, 0, f_size), | |
661 | .frac_lo = f.low, | |
662 | }; | |
663 | } | |
664 | ||
6fff2167 | 665 | /* Pack a float from parts, but do not canonicalize. */ |
9e4af58c | 666 | static uint64_t pack_raw64(const FloatParts64 *p, const FloatFmt *fmt) |
6fff2167 | 667 | { |
9e4af58c RH |
668 | const int f_size = fmt->frac_size; |
669 | const int e_size = fmt->exp_size; | |
670 | uint64_t ret; | |
671 | ||
672 | ret = (uint64_t)p->sign << (f_size + e_size); | |
673 | ret = deposit64(ret, f_size, e_size, p->exp); | |
674 | ret = deposit64(ret, 0, f_size, p->frac); | |
675 | return ret; | |
6fff2167 AB |
676 | } |
677 | ||
71fd178e | 678 | static inline float16 float16_pack_raw(const FloatParts64 *p) |
6fff2167 | 679 | { |
71fd178e | 680 | return make_float16(pack_raw64(p, &float16_params)); |
6fff2167 AB |
681 | } |
682 | ||
71fd178e | 683 | static inline bfloat16 bfloat16_pack_raw(const FloatParts64 *p) |
8282310d | 684 | { |
71fd178e | 685 | return pack_raw64(p, &bfloat16_params); |
8282310d LZ |
686 | } |
687 | ||
71fd178e | 688 | static inline float32 float32_pack_raw(const FloatParts64 *p) |
6fff2167 | 689 | { |
71fd178e | 690 | return make_float32(pack_raw64(p, &float32_params)); |
6fff2167 AB |
691 | } |
692 | ||
71fd178e | 693 | static inline float64 float64_pack_raw(const FloatParts64 *p) |
6fff2167 | 694 | { |
71fd178e | 695 | return make_float64(pack_raw64(p, &float64_params)); |
6fff2167 AB |
696 | } |
697 | ||
0018b1f4 RH |
698 | static float128 float128_pack_raw(const FloatParts128 *p) |
699 | { | |
700 | const int f_size = float128_params.frac_size - 64; | |
701 | const int e_size = float128_params.exp_size; | |
702 | uint64_t hi; | |
703 | ||
704 | hi = (uint64_t)p->sign << (f_size + e_size); | |
705 | hi = deposit64(hi, f_size, e_size, p->exp); | |
706 | hi = deposit64(hi, 0, f_size, p->frac_hi); | |
707 | return make_float128(hi, p->frac_lo); | |
708 | } | |
709 | ||
0664335a RH |
710 | /*---------------------------------------------------------------------------- |
711 | | Functions and definitions to determine: (1) whether tininess for underflow | |
712 | | is detected before or after rounding by default, (2) what (if anything) | |
713 | | happens when exceptions are raised, (3) how signaling NaNs are distinguished | |
714 | | from quiet NaNs, (4) the default generated quiet NaNs, and (5) how NaNs | |
715 | | are propagated from function inputs to output. These details are target- | |
716 | | specific. | |
717 | *----------------------------------------------------------------------------*/ | |
139c1837 | 718 | #include "softfloat-specialize.c.inc" |
0664335a | 719 | |
0018b1f4 RH |
720 | #define PARTS_GENERIC_64_128(NAME, P) \ |
721 | QEMU_GENERIC(P, (FloatParts128 *, parts128_##NAME), parts64_##NAME) | |
722 | ||
dedd123c RH |
723 | #define PARTS_GENERIC_64_128_256(NAME, P) \ |
724 | QEMU_GENERIC(P, (FloatParts256 *, parts256_##NAME), \ | |
725 | (FloatParts128 *, parts128_##NAME), parts64_##NAME) | |
726 | ||
e9034ea8 | 727 | #define parts_default_nan(P, S) PARTS_GENERIC_64_128(default_nan, P)(P, S) |
0018b1f4 RH |
728 | #define parts_silence_nan(P, S) PARTS_GENERIC_64_128(silence_nan, P)(P, S) |
729 | ||
7c45bad8 RH |
730 | static void parts64_return_nan(FloatParts64 *a, float_status *s); |
731 | static void parts128_return_nan(FloatParts128 *a, float_status *s); | |
732 | ||
733 | #define parts_return_nan(P, S) PARTS_GENERIC_64_128(return_nan, P)(P, S) | |
0018b1f4 | 734 | |
22c355f4 RH |
735 | static FloatParts64 *parts64_pick_nan(FloatParts64 *a, FloatParts64 *b, |
736 | float_status *s); | |
737 | static FloatParts128 *parts128_pick_nan(FloatParts128 *a, FloatParts128 *b, | |
738 | float_status *s); | |
739 | ||
740 | #define parts_pick_nan(A, B, S) PARTS_GENERIC_64_128(pick_nan, A)(A, B, S) | |
741 | ||
979582d0 RH |
742 | static FloatParts64 *parts64_pick_nan_muladd(FloatParts64 *a, FloatParts64 *b, |
743 | FloatParts64 *c, float_status *s, | |
744 | int ab_mask, int abc_mask); | |
745 | static FloatParts128 *parts128_pick_nan_muladd(FloatParts128 *a, | |
746 | FloatParts128 *b, | |
747 | FloatParts128 *c, | |
748 | float_status *s, | |
749 | int ab_mask, int abc_mask); | |
750 | ||
751 | #define parts_pick_nan_muladd(A, B, C, S, ABM, ABCM) \ | |
752 | PARTS_GENERIC_64_128(pick_nan_muladd, A)(A, B, C, S, ABM, ABCM) | |
753 | ||
d46975bc RH |
754 | static void parts64_canonicalize(FloatParts64 *p, float_status *status, |
755 | const FloatFmt *fmt); | |
756 | static void parts128_canonicalize(FloatParts128 *p, float_status *status, | |
757 | const FloatFmt *fmt); | |
758 | ||
759 | #define parts_canonicalize(A, S, F) \ | |
760 | PARTS_GENERIC_64_128(canonicalize, A)(A, S, F) | |
761 | ||
25fdedf0 RH |
762 | static void parts64_uncanon_normal(FloatParts64 *p, float_status *status, |
763 | const FloatFmt *fmt); | |
764 | static void parts128_uncanon_normal(FloatParts128 *p, float_status *status, | |
765 | const FloatFmt *fmt); | |
766 | ||
767 | #define parts_uncanon_normal(A, S, F) \ | |
768 | PARTS_GENERIC_64_128(uncanon_normal, A)(A, S, F) | |
769 | ||
ee6959f2 RH |
770 | static void parts64_uncanon(FloatParts64 *p, float_status *status, |
771 | const FloatFmt *fmt); | |
772 | static void parts128_uncanon(FloatParts128 *p, float_status *status, | |
773 | const FloatFmt *fmt); | |
774 | ||
775 | #define parts_uncanon(A, S, F) \ | |
776 | PARTS_GENERIC_64_128(uncanon, A)(A, S, F) | |
777 | ||
da10a907 RH |
778 | static void parts64_add_normal(FloatParts64 *a, FloatParts64 *b); |
779 | static void parts128_add_normal(FloatParts128 *a, FloatParts128 *b); | |
dedd123c | 780 | static void parts256_add_normal(FloatParts256 *a, FloatParts256 *b); |
da10a907 RH |
781 | |
782 | #define parts_add_normal(A, B) \ | |
dedd123c | 783 | PARTS_GENERIC_64_128_256(add_normal, A)(A, B) |
da10a907 RH |
784 | |
785 | static bool parts64_sub_normal(FloatParts64 *a, FloatParts64 *b); | |
786 | static bool parts128_sub_normal(FloatParts128 *a, FloatParts128 *b); | |
dedd123c | 787 | static bool parts256_sub_normal(FloatParts256 *a, FloatParts256 *b); |
da10a907 RH |
788 | |
789 | #define parts_sub_normal(A, B) \ | |
dedd123c | 790 | PARTS_GENERIC_64_128_256(sub_normal, A)(A, B) |
da10a907 RH |
791 | |
792 | static FloatParts64 *parts64_addsub(FloatParts64 *a, FloatParts64 *b, | |
793 | float_status *s, bool subtract); | |
794 | static FloatParts128 *parts128_addsub(FloatParts128 *a, FloatParts128 *b, | |
795 | float_status *s, bool subtract); | |
796 | ||
797 | #define parts_addsub(A, B, S, Z) \ | |
798 | PARTS_GENERIC_64_128(addsub, A)(A, B, S, Z) | |
799 | ||
aca84527 RH |
800 | static FloatParts64 *parts64_mul(FloatParts64 *a, FloatParts64 *b, |
801 | float_status *s); | |
802 | static FloatParts128 *parts128_mul(FloatParts128 *a, FloatParts128 *b, | |
803 | float_status *s); | |
804 | ||
805 | #define parts_mul(A, B, S) \ | |
806 | PARTS_GENERIC_64_128(mul, A)(A, B, S) | |
807 | ||
dedd123c RH |
808 | static FloatParts64 *parts64_muladd(FloatParts64 *a, FloatParts64 *b, |
809 | FloatParts64 *c, int flags, | |
810 | float_status *s); | |
811 | static FloatParts128 *parts128_muladd(FloatParts128 *a, FloatParts128 *b, | |
812 | FloatParts128 *c, int flags, | |
813 | float_status *s); | |
814 | ||
815 | #define parts_muladd(A, B, C, Z, S) \ | |
816 | PARTS_GENERIC_64_128(muladd, A)(A, B, C, Z, S) | |
817 | ||
ec961b81 RH |
818 | static FloatParts64 *parts64_div(FloatParts64 *a, FloatParts64 *b, |
819 | float_status *s); | |
820 | static FloatParts128 *parts128_div(FloatParts128 *a, FloatParts128 *b, | |
821 | float_status *s); | |
822 | ||
823 | #define parts_div(A, B, S) \ | |
824 | PARTS_GENERIC_64_128(div, A)(A, B, S) | |
825 | ||
9261b245 RH |
826 | static void parts64_sqrt(FloatParts64 *a, float_status *s, const FloatFmt *f); |
827 | static void parts128_sqrt(FloatParts128 *a, float_status *s, const FloatFmt *f); | |
828 | ||
829 | #define parts_sqrt(A, S, F) \ | |
830 | PARTS_GENERIC_64_128(sqrt, A)(A, S, F) | |
831 | ||
afc34931 RH |
832 | static bool parts64_round_to_int_normal(FloatParts64 *a, FloatRoundMode rm, |
833 | int scale, int frac_size); | |
834 | static bool parts128_round_to_int_normal(FloatParts128 *a, FloatRoundMode r, | |
835 | int scale, int frac_size); | |
836 | ||
837 | #define parts_round_to_int_normal(A, R, C, F) \ | |
838 | PARTS_GENERIC_64_128(round_to_int_normal, A)(A, R, C, F) | |
839 | ||
840 | static void parts64_round_to_int(FloatParts64 *a, FloatRoundMode rm, | |
841 | int scale, float_status *s, | |
842 | const FloatFmt *fmt); | |
843 | static void parts128_round_to_int(FloatParts128 *a, FloatRoundMode r, | |
844 | int scale, float_status *s, | |
845 | const FloatFmt *fmt); | |
846 | ||
847 | #define parts_round_to_int(A, R, C, S, F) \ | |
848 | PARTS_GENERIC_64_128(round_to_int, A)(A, R, C, S, F) | |
849 | ||
463b3f0d RH |
850 | static int64_t parts64_float_to_sint(FloatParts64 *p, FloatRoundMode rmode, |
851 | int scale, int64_t min, int64_t max, | |
852 | float_status *s); | |
853 | static int64_t parts128_float_to_sint(FloatParts128 *p, FloatRoundMode rmode, | |
854 | int scale, int64_t min, int64_t max, | |
855 | float_status *s); | |
856 | ||
857 | #define parts_float_to_sint(P, R, Z, MN, MX, S) \ | |
858 | PARTS_GENERIC_64_128(float_to_sint, P)(P, R, Z, MN, MX, S) | |
859 | ||
4ab4aef0 RH |
860 | static uint64_t parts64_float_to_uint(FloatParts64 *p, FloatRoundMode rmode, |
861 | int scale, uint64_t max, | |
862 | float_status *s); | |
863 | static uint64_t parts128_float_to_uint(FloatParts128 *p, FloatRoundMode rmode, | |
864 | int scale, uint64_t max, | |
865 | float_status *s); | |
866 | ||
867 | #define parts_float_to_uint(P, R, Z, M, S) \ | |
868 | PARTS_GENERIC_64_128(float_to_uint, P)(P, R, Z, M, S) | |
869 | ||
e3689519 RH |
870 | static void parts64_sint_to_float(FloatParts64 *p, int64_t a, |
871 | int scale, float_status *s); | |
872 | static void parts128_sint_to_float(FloatParts128 *p, int64_t a, | |
873 | int scale, float_status *s); | |
874 | ||
875 | #define parts_sint_to_float(P, I, Z, S) \ | |
876 | PARTS_GENERIC_64_128(sint_to_float, P)(P, I, Z, S) | |
877 | ||
37c954a1 RH |
878 | static void parts64_uint_to_float(FloatParts64 *p, uint64_t a, |
879 | int scale, float_status *s); | |
880 | static void parts128_uint_to_float(FloatParts128 *p, uint64_t a, | |
881 | int scale, float_status *s); | |
882 | ||
883 | #define parts_uint_to_float(P, I, Z, S) \ | |
884 | PARTS_GENERIC_64_128(uint_to_float, P)(P, I, Z, S) | |
885 | ||
e1c4667a RH |
886 | static FloatParts64 *parts64_minmax(FloatParts64 *a, FloatParts64 *b, |
887 | float_status *s, int flags); | |
888 | static FloatParts128 *parts128_minmax(FloatParts128 *a, FloatParts128 *b, | |
889 | float_status *s, int flags); | |
890 | ||
891 | #define parts_minmax(A, B, S, F) \ | |
892 | PARTS_GENERIC_64_128(minmax, A)(A, B, S, F) | |
893 | ||
6eb169b8 RH |
894 | static int parts64_compare(FloatParts64 *a, FloatParts64 *b, |
895 | float_status *s, bool q); | |
896 | static int parts128_compare(FloatParts128 *a, FloatParts128 *b, | |
897 | float_status *s, bool q); | |
898 | ||
899 | #define parts_compare(A, B, S, Q) \ | |
900 | PARTS_GENERIC_64_128(compare, A)(A, B, S, Q) | |
901 | ||
39626b0c RH |
902 | static void parts64_scalbn(FloatParts64 *a, int n, float_status *s); |
903 | static void parts128_scalbn(FloatParts128 *a, int n, float_status *s); | |
904 | ||
905 | #define parts_scalbn(A, N, S) \ | |
906 | PARTS_GENERIC_64_128(scalbn, A)(A, N, S) | |
907 | ||
0018b1f4 RH |
908 | /* |
909 | * Helper functions for softfloat-parts.c.inc, per-size operations. | |
910 | */ | |
911 | ||
22c355f4 RH |
912 | #define FRAC_GENERIC_64_128(NAME, P) \ |
913 | QEMU_GENERIC(P, (FloatParts128 *, frac128_##NAME), frac64_##NAME) | |
914 | ||
dedd123c RH |
915 | #define FRAC_GENERIC_64_128_256(NAME, P) \ |
916 | QEMU_GENERIC(P, (FloatParts256 *, frac256_##NAME), \ | |
917 | (FloatParts128 *, frac128_##NAME), frac64_##NAME) | |
918 | ||
da10a907 RH |
919 | static bool frac64_add(FloatParts64 *r, FloatParts64 *a, FloatParts64 *b) |
920 | { | |
921 | return uadd64_overflow(a->frac, b->frac, &r->frac); | |
922 | } | |
923 | ||
924 | static bool frac128_add(FloatParts128 *r, FloatParts128 *a, FloatParts128 *b) | |
925 | { | |
926 | bool c = 0; | |
927 | r->frac_lo = uadd64_carry(a->frac_lo, b->frac_lo, &c); | |
928 | r->frac_hi = uadd64_carry(a->frac_hi, b->frac_hi, &c); | |
929 | return c; | |
930 | } | |
931 | ||
dedd123c RH |
932 | static bool frac256_add(FloatParts256 *r, FloatParts256 *a, FloatParts256 *b) |
933 | { | |
934 | bool c = 0; | |
935 | r->frac_lo = uadd64_carry(a->frac_lo, b->frac_lo, &c); | |
936 | r->frac_lm = uadd64_carry(a->frac_lm, b->frac_lm, &c); | |
937 | r->frac_hm = uadd64_carry(a->frac_hm, b->frac_hm, &c); | |
938 | r->frac_hi = uadd64_carry(a->frac_hi, b->frac_hi, &c); | |
939 | return c; | |
940 | } | |
941 | ||
942 | #define frac_add(R, A, B) FRAC_GENERIC_64_128_256(add, R)(R, A, B) | |
da10a907 | 943 | |
ee6959f2 RH |
944 | static bool frac64_addi(FloatParts64 *r, FloatParts64 *a, uint64_t c) |
945 | { | |
946 | return uadd64_overflow(a->frac, c, &r->frac); | |
947 | } | |
948 | ||
949 | static bool frac128_addi(FloatParts128 *r, FloatParts128 *a, uint64_t c) | |
950 | { | |
951 | c = uadd64_overflow(a->frac_lo, c, &r->frac_lo); | |
952 | return uadd64_overflow(a->frac_hi, c, &r->frac_hi); | |
953 | } | |
954 | ||
955 | #define frac_addi(R, A, C) FRAC_GENERIC_64_128(addi, R)(R, A, C) | |
956 | ||
957 | static void frac64_allones(FloatParts64 *a) | |
958 | { | |
959 | a->frac = -1; | |
960 | } | |
961 | ||
962 | static void frac128_allones(FloatParts128 *a) | |
963 | { | |
964 | a->frac_hi = a->frac_lo = -1; | |
965 | } | |
966 | ||
967 | #define frac_allones(A) FRAC_GENERIC_64_128(allones, A)(A) | |
968 | ||
22c355f4 RH |
969 | static int frac64_cmp(FloatParts64 *a, FloatParts64 *b) |
970 | { | |
971 | return a->frac == b->frac ? 0 : a->frac < b->frac ? -1 : 1; | |
972 | } | |
973 | ||
974 | static int frac128_cmp(FloatParts128 *a, FloatParts128 *b) | |
975 | { | |
976 | uint64_t ta = a->frac_hi, tb = b->frac_hi; | |
977 | if (ta == tb) { | |
978 | ta = a->frac_lo, tb = b->frac_lo; | |
979 | if (ta == tb) { | |
980 | return 0; | |
981 | } | |
982 | } | |
983 | return ta < tb ? -1 : 1; | |
984 | } | |
985 | ||
986 | #define frac_cmp(A, B) FRAC_GENERIC_64_128(cmp, A)(A, B) | |
987 | ||
d46975bc | 988 | static void frac64_clear(FloatParts64 *a) |
0018b1f4 | 989 | { |
d46975bc RH |
990 | a->frac = 0; |
991 | } | |
992 | ||
993 | static void frac128_clear(FloatParts128 *a) | |
994 | { | |
995 | a->frac_hi = a->frac_lo = 0; | |
0018b1f4 RH |
996 | } |
997 | ||
d46975bc | 998 | #define frac_clear(A) FRAC_GENERIC_64_128(clear, A)(A) |
0018b1f4 | 999 | |
ec961b81 RH |
1000 | static bool frac64_div(FloatParts64 *a, FloatParts64 *b) |
1001 | { | |
1002 | uint64_t n1, n0, r, q; | |
1003 | bool ret; | |
1004 | ||
1005 | /* | |
1006 | * We want a 2*N / N-bit division to produce exactly an N-bit | |
1007 | * result, so that we do not lose any precision and so that we | |
1008 | * do not have to renormalize afterward. If A.frac < B.frac, | |
1009 | * then division would produce an (N-1)-bit result; shift A left | |
1010 | * by one to produce the an N-bit result, and return true to | |
1011 | * decrement the exponent to match. | |
1012 | * | |
1013 | * The udiv_qrnnd algorithm that we're using requires normalization, | |
1014 | * i.e. the msb of the denominator must be set, which is already true. | |
1015 | */ | |
1016 | ret = a->frac < b->frac; | |
1017 | if (ret) { | |
1018 | n0 = a->frac; | |
1019 | n1 = 0; | |
1020 | } else { | |
1021 | n0 = a->frac >> 1; | |
1022 | n1 = a->frac << 63; | |
1023 | } | |
1024 | q = udiv_qrnnd(&r, n0, n1, b->frac); | |
1025 | ||
1026 | /* Set lsb if there is a remainder, to set inexact. */ | |
1027 | a->frac = q | (r != 0); | |
1028 | ||
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | static bool frac128_div(FloatParts128 *a, FloatParts128 *b) | |
1033 | { | |
1034 | uint64_t q0, q1, a0, a1, b0, b1; | |
1035 | uint64_t r0, r1, r2, r3, t0, t1, t2, t3; | |
1036 | bool ret = false; | |
1037 | ||
1038 | a0 = a->frac_hi, a1 = a->frac_lo; | |
1039 | b0 = b->frac_hi, b1 = b->frac_lo; | |
1040 | ||
1041 | ret = lt128(a0, a1, b0, b1); | |
1042 | if (!ret) { | |
1043 | a1 = shr_double(a0, a1, 1); | |
1044 | a0 = a0 >> 1; | |
1045 | } | |
1046 | ||
1047 | /* Use 128/64 -> 64 division as estimate for 192/128 -> 128 division. */ | |
1048 | q0 = estimateDiv128To64(a0, a1, b0); | |
1049 | ||
1050 | /* | |
1051 | * Estimate is high because B1 was not included (unless B1 == 0). | |
1052 | * Reduce quotient and increase remainder until remainder is non-negative. | |
1053 | * This loop will execute 0 to 2 times. | |
1054 | */ | |
1055 | mul128By64To192(b0, b1, q0, &t0, &t1, &t2); | |
1056 | sub192(a0, a1, 0, t0, t1, t2, &r0, &r1, &r2); | |
1057 | while (r0 != 0) { | |
1058 | q0--; | |
1059 | add192(r0, r1, r2, 0, b0, b1, &r0, &r1, &r2); | |
1060 | } | |
1061 | ||
1062 | /* Repeat using the remainder, producing a second word of quotient. */ | |
1063 | q1 = estimateDiv128To64(r1, r2, b0); | |
1064 | mul128By64To192(b0, b1, q1, &t1, &t2, &t3); | |
1065 | sub192(r1, r2, 0, t1, t2, t3, &r1, &r2, &r3); | |
1066 | while (r1 != 0) { | |
1067 | q1--; | |
1068 | add192(r1, r2, r3, 0, b0, b1, &r1, &r2, &r3); | |
1069 | } | |
1070 | ||
1071 | /* Any remainder indicates inexact; set sticky bit. */ | |
1072 | q1 |= (r2 | r3) != 0; | |
1073 | ||
1074 | a->frac_hi = q0; | |
1075 | a->frac_lo = q1; | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | #define frac_div(A, B) FRAC_GENERIC_64_128(div, A)(A, B) | |
1080 | ||
d46975bc | 1081 | static bool frac64_eqz(FloatParts64 *a) |
0018b1f4 | 1082 | { |
d46975bc RH |
1083 | return a->frac == 0; |
1084 | } | |
1085 | ||
1086 | static bool frac128_eqz(FloatParts128 *a) | |
1087 | { | |
1088 | return (a->frac_hi | a->frac_lo) == 0; | |
0018b1f4 RH |
1089 | } |
1090 | ||
d46975bc | 1091 | #define frac_eqz(A) FRAC_GENERIC_64_128(eqz, A)(A) |
0fc07cad | 1092 | |
aca84527 RH |
1093 | static void frac64_mulw(FloatParts128 *r, FloatParts64 *a, FloatParts64 *b) |
1094 | { | |
1095 | mulu64(&r->frac_lo, &r->frac_hi, a->frac, b->frac); | |
1096 | } | |
1097 | ||
1098 | static void frac128_mulw(FloatParts256 *r, FloatParts128 *a, FloatParts128 *b) | |
1099 | { | |
1100 | mul128To256(a->frac_hi, a->frac_lo, b->frac_hi, b->frac_lo, | |
1101 | &r->frac_hi, &r->frac_hm, &r->frac_lm, &r->frac_lo); | |
1102 | } | |
1103 | ||
1104 | #define frac_mulw(R, A, B) FRAC_GENERIC_64_128(mulw, A)(R, A, B) | |
1105 | ||
da10a907 RH |
1106 | static void frac64_neg(FloatParts64 *a) |
1107 | { | |
1108 | a->frac = -a->frac; | |
1109 | } | |
1110 | ||
1111 | static void frac128_neg(FloatParts128 *a) | |
1112 | { | |
1113 | bool c = 0; | |
1114 | a->frac_lo = usub64_borrow(0, a->frac_lo, &c); | |
1115 | a->frac_hi = usub64_borrow(0, a->frac_hi, &c); | |
1116 | } | |
1117 | ||
dedd123c RH |
1118 | static void frac256_neg(FloatParts256 *a) |
1119 | { | |
1120 | bool c = 0; | |
1121 | a->frac_lo = usub64_borrow(0, a->frac_lo, &c); | |
1122 | a->frac_lm = usub64_borrow(0, a->frac_lm, &c); | |
1123 | a->frac_hm = usub64_borrow(0, a->frac_hm, &c); | |
1124 | a->frac_hi = usub64_borrow(0, a->frac_hi, &c); | |
1125 | } | |
1126 | ||
1127 | #define frac_neg(A) FRAC_GENERIC_64_128_256(neg, A)(A) | |
da10a907 | 1128 | |
d46975bc | 1129 | static int frac64_normalize(FloatParts64 *a) |
6fff2167 | 1130 | { |
d46975bc RH |
1131 | if (a->frac) { |
1132 | int shift = clz64(a->frac); | |
1133 | a->frac <<= shift; | |
1134 | return shift; | |
1135 | } | |
1136 | return 64; | |
1137 | } | |
1138 | ||
1139 | static int frac128_normalize(FloatParts128 *a) | |
1140 | { | |
1141 | if (a->frac_hi) { | |
1142 | int shl = clz64(a->frac_hi); | |
463e45dc RH |
1143 | a->frac_hi = shl_double(a->frac_hi, a->frac_lo, shl); |
1144 | a->frac_lo <<= shl; | |
d46975bc RH |
1145 | return shl; |
1146 | } else if (a->frac_lo) { | |
1147 | int shl = clz64(a->frac_lo); | |
463e45dc | 1148 | a->frac_hi = a->frac_lo << shl; |
d46975bc RH |
1149 | a->frac_lo = 0; |
1150 | return shl + 64; | |
6fff2167 | 1151 | } |
d46975bc | 1152 | return 128; |
6fff2167 AB |
1153 | } |
1154 | ||
dedd123c RH |
1155 | static int frac256_normalize(FloatParts256 *a) |
1156 | { | |
1157 | uint64_t a0 = a->frac_hi, a1 = a->frac_hm; | |
1158 | uint64_t a2 = a->frac_lm, a3 = a->frac_lo; | |
463e45dc | 1159 | int ret, shl; |
dedd123c RH |
1160 | |
1161 | if (likely(a0)) { | |
1162 | shl = clz64(a0); | |
1163 | if (shl == 0) { | |
1164 | return 0; | |
1165 | } | |
1166 | ret = shl; | |
1167 | } else { | |
1168 | if (a1) { | |
1169 | ret = 64; | |
1170 | a0 = a1, a1 = a2, a2 = a3, a3 = 0; | |
1171 | } else if (a2) { | |
1172 | ret = 128; | |
1173 | a0 = a2, a1 = a3, a2 = 0, a3 = 0; | |
1174 | } else if (a3) { | |
1175 | ret = 192; | |
1176 | a0 = a3, a1 = 0, a2 = 0, a3 = 0; | |
1177 | } else { | |
1178 | ret = 256; | |
1179 | a0 = 0, a1 = 0, a2 = 0, a3 = 0; | |
1180 | goto done; | |
1181 | } | |
1182 | shl = clz64(a0); | |
1183 | if (shl == 0) { | |
1184 | goto done; | |
1185 | } | |
1186 | ret += shl; | |
1187 | } | |
1188 | ||
463e45dc RH |
1189 | a0 = shl_double(a0, a1, shl); |
1190 | a1 = shl_double(a1, a2, shl); | |
1191 | a2 = shl_double(a2, a3, shl); | |
1192 | a3 <<= shl; | |
dedd123c RH |
1193 | |
1194 | done: | |
1195 | a->frac_hi = a0; | |
1196 | a->frac_hm = a1; | |
1197 | a->frac_lm = a2; | |
1198 | a->frac_lo = a3; | |
1199 | return ret; | |
1200 | } | |
1201 | ||
1202 | #define frac_normalize(A) FRAC_GENERIC_64_128_256(normalize, A)(A) | |
d46975bc RH |
1203 | |
1204 | static void frac64_shl(FloatParts64 *a, int c) | |
1205 | { | |
1206 | a->frac <<= c; | |
1207 | } | |
1208 | ||
1209 | static void frac128_shl(FloatParts128 *a, int c) | |
1210 | { | |
463e45dc RH |
1211 | uint64_t a0 = a->frac_hi, a1 = a->frac_lo; |
1212 | ||
1213 | if (c & 64) { | |
1214 | a0 = a1, a1 = 0; | |
1215 | } | |
1216 | ||
1217 | c &= 63; | |
1218 | if (c) { | |
1219 | a0 = shl_double(a0, a1, c); | |
1220 | a1 = a1 << c; | |
1221 | } | |
1222 | ||
1223 | a->frac_hi = a0; | |
1224 | a->frac_lo = a1; | |
d46975bc RH |
1225 | } |
1226 | ||
1227 | #define frac_shl(A, C) FRAC_GENERIC_64_128(shl, A)(A, C) | |
1228 | ||
1229 | static void frac64_shr(FloatParts64 *a, int c) | |
1230 | { | |
1231 | a->frac >>= c; | |
1232 | } | |
1233 | ||
1234 | static void frac128_shr(FloatParts128 *a, int c) | |
1235 | { | |
463e45dc RH |
1236 | uint64_t a0 = a->frac_hi, a1 = a->frac_lo; |
1237 | ||
1238 | if (c & 64) { | |
1239 | a1 = a0, a0 = 0; | |
1240 | } | |
1241 | ||
1242 | c &= 63; | |
1243 | if (c) { | |
1244 | a1 = shr_double(a0, a1, c); | |
1245 | a0 = a0 >> c; | |
1246 | } | |
1247 | ||
1248 | a->frac_hi = a0; | |
1249 | a->frac_lo = a1; | |
d46975bc RH |
1250 | } |
1251 | ||
1252 | #define frac_shr(A, C) FRAC_GENERIC_64_128(shr, A)(A, C) | |
1253 | ||
ee6959f2 | 1254 | static void frac64_shrjam(FloatParts64 *a, int c) |
6fff2167 | 1255 | { |
463e45dc RH |
1256 | uint64_t a0 = a->frac; |
1257 | ||
1258 | if (likely(c != 0)) { | |
1259 | if (likely(c < 64)) { | |
1260 | a0 = (a0 >> c) | (shr_double(a0, 0, c) != 0); | |
1261 | } else { | |
1262 | a0 = a0 != 0; | |
1263 | } | |
1264 | a->frac = a0; | |
1265 | } | |
ee6959f2 | 1266 | } |
6fff2167 | 1267 | |
ee6959f2 RH |
1268 | static void frac128_shrjam(FloatParts128 *a, int c) |
1269 | { | |
463e45dc RH |
1270 | uint64_t a0 = a->frac_hi, a1 = a->frac_lo; |
1271 | uint64_t sticky = 0; | |
1272 | ||
1273 | if (unlikely(c == 0)) { | |
1274 | return; | |
1275 | } else if (likely(c < 64)) { | |
1276 | /* nothing */ | |
1277 | } else if (likely(c < 128)) { | |
1278 | sticky = a1; | |
1279 | a1 = a0; | |
1280 | a0 = 0; | |
1281 | c &= 63; | |
1282 | if (c == 0) { | |
1283 | goto done; | |
1284 | } | |
1285 | } else { | |
1286 | sticky = a0 | a1; | |
1287 | a0 = a1 = 0; | |
1288 | goto done; | |
1289 | } | |
1290 | ||
1291 | sticky |= shr_double(a1, 0, c); | |
1292 | a1 = shr_double(a0, a1, c); | |
1293 | a0 = a0 >> c; | |
1294 | ||
1295 | done: | |
1296 | a->frac_lo = a1 | (sticky != 0); | |
1297 | a->frac_hi = a0; | |
6fff2167 AB |
1298 | } |
1299 | ||
dedd123c RH |
1300 | static void frac256_shrjam(FloatParts256 *a, int c) |
1301 | { | |
1302 | uint64_t a0 = a->frac_hi, a1 = a->frac_hm; | |
1303 | uint64_t a2 = a->frac_lm, a3 = a->frac_lo; | |
1304 | uint64_t sticky = 0; | |
dedd123c RH |
1305 | |
1306 | if (unlikely(c == 0)) { | |
1307 | return; | |
1308 | } else if (likely(c < 64)) { | |
1309 | /* nothing */ | |
1310 | } else if (likely(c < 256)) { | |
1311 | if (unlikely(c & 128)) { | |
1312 | sticky |= a2 | a3; | |
1313 | a3 = a1, a2 = a0, a1 = 0, a0 = 0; | |
1314 | } | |
1315 | if (unlikely(c & 64)) { | |
1316 | sticky |= a3; | |
1317 | a3 = a2, a2 = a1, a1 = a0, a0 = 0; | |
1318 | } | |
1319 | c &= 63; | |
1320 | if (c == 0) { | |
1321 | goto done; | |
1322 | } | |
1323 | } else { | |
1324 | sticky = a0 | a1 | a2 | a3; | |
1325 | a0 = a1 = a2 = a3 = 0; | |
1326 | goto done; | |
1327 | } | |
1328 | ||
463e45dc RH |
1329 | sticky |= shr_double(a3, 0, c); |
1330 | a3 = shr_double(a2, a3, c); | |
1331 | a2 = shr_double(a1, a2, c); | |
1332 | a1 = shr_double(a0, a1, c); | |
1333 | a0 = a0 >> c; | |
dedd123c RH |
1334 | |
1335 | done: | |
1336 | a->frac_lo = a3 | (sticky != 0); | |
1337 | a->frac_lm = a2; | |
1338 | a->frac_hm = a1; | |
1339 | a->frac_hi = a0; | |
1340 | } | |
1341 | ||
1342 | #define frac_shrjam(A, C) FRAC_GENERIC_64_128_256(shrjam, A)(A, C) | |
d446830a | 1343 | |
da10a907 RH |
1344 | static bool frac64_sub(FloatParts64 *r, FloatParts64 *a, FloatParts64 *b) |
1345 | { | |
1346 | return usub64_overflow(a->frac, b->frac, &r->frac); | |
1347 | } | |
7c45bad8 | 1348 | |
da10a907 RH |
1349 | static bool frac128_sub(FloatParts128 *r, FloatParts128 *a, FloatParts128 *b) |
1350 | { | |
1351 | bool c = 0; | |
1352 | r->frac_lo = usub64_borrow(a->frac_lo, b->frac_lo, &c); | |
1353 | r->frac_hi = usub64_borrow(a->frac_hi, b->frac_hi, &c); | |
1354 | return c; | |
1355 | } | |
1356 | ||
dedd123c RH |
1357 | static bool frac256_sub(FloatParts256 *r, FloatParts256 *a, FloatParts256 *b) |
1358 | { | |
1359 | bool c = 0; | |
1360 | r->frac_lo = usub64_borrow(a->frac_lo, b->frac_lo, &c); | |
1361 | r->frac_lm = usub64_borrow(a->frac_lm, b->frac_lm, &c); | |
1362 | r->frac_hm = usub64_borrow(a->frac_hm, b->frac_hm, &c); | |
1363 | r->frac_hi = usub64_borrow(a->frac_hi, b->frac_hi, &c); | |
1364 | return c; | |
1365 | } | |
1366 | ||
1367 | #define frac_sub(R, A, B) FRAC_GENERIC_64_128_256(sub, R)(R, A, B) | |
da10a907 | 1368 | |
aca84527 RH |
1369 | static void frac64_truncjam(FloatParts64 *r, FloatParts128 *a) |
1370 | { | |
1371 | r->frac = a->frac_hi | (a->frac_lo != 0); | |
1372 | } | |
1373 | ||
1374 | static void frac128_truncjam(FloatParts128 *r, FloatParts256 *a) | |
1375 | { | |
1376 | r->frac_hi = a->frac_hi; | |
1377 | r->frac_lo = a->frac_hm | ((a->frac_lm | a->frac_lo) != 0); | |
1378 | } | |
1379 | ||
1380 | #define frac_truncjam(R, A) FRAC_GENERIC_64_128(truncjam, R)(R, A) | |
1381 | ||
dedd123c RH |
1382 | static void frac64_widen(FloatParts128 *r, FloatParts64 *a) |
1383 | { | |
1384 | r->frac_hi = a->frac; | |
1385 | r->frac_lo = 0; | |
1386 | } | |
1387 | ||
1388 | static void frac128_widen(FloatParts256 *r, FloatParts128 *a) | |
1389 | { | |
1390 | r->frac_hi = a->frac_hi; | |
1391 | r->frac_hm = a->frac_lo; | |
1392 | r->frac_lm = 0; | |
1393 | r->frac_lo = 0; | |
1394 | } | |
1395 | ||
1396 | #define frac_widen(A, B) FRAC_GENERIC_64_128(widen, B)(A, B) | |
1397 | ||
9261b245 RH |
1398 | /* |
1399 | * Reciprocal sqrt table. 1 bit of exponent, 6-bits of mantessa. | |
1400 | * From https://git.musl-libc.org/cgit/musl/tree/src/math/sqrt_data.c | |
1401 | * and thus MIT licenced. | |
1402 | */ | |
1403 | static const uint16_t rsqrt_tab[128] = { | |
1404 | 0xb451, 0xb2f0, 0xb196, 0xb044, 0xaef9, 0xadb6, 0xac79, 0xab43, | |
1405 | 0xaa14, 0xa8eb, 0xa7c8, 0xa6aa, 0xa592, 0xa480, 0xa373, 0xa26b, | |
1406 | 0xa168, 0xa06a, 0x9f70, 0x9e7b, 0x9d8a, 0x9c9d, 0x9bb5, 0x9ad1, | |
1407 | 0x99f0, 0x9913, 0x983a, 0x9765, 0x9693, 0x95c4, 0x94f8, 0x9430, | |
1408 | 0x936b, 0x92a9, 0x91ea, 0x912e, 0x9075, 0x8fbe, 0x8f0a, 0x8e59, | |
1409 | 0x8daa, 0x8cfe, 0x8c54, 0x8bac, 0x8b07, 0x8a64, 0x89c4, 0x8925, | |
1410 | 0x8889, 0x87ee, 0x8756, 0x86c0, 0x862b, 0x8599, 0x8508, 0x8479, | |
1411 | 0x83ec, 0x8361, 0x82d8, 0x8250, 0x81c9, 0x8145, 0x80c2, 0x8040, | |
1412 | 0xff02, 0xfd0e, 0xfb25, 0xf947, 0xf773, 0xf5aa, 0xf3ea, 0xf234, | |
1413 | 0xf087, 0xeee3, 0xed47, 0xebb3, 0xea27, 0xe8a3, 0xe727, 0xe5b2, | |
1414 | 0xe443, 0xe2dc, 0xe17a, 0xe020, 0xdecb, 0xdd7d, 0xdc34, 0xdaf1, | |
1415 | 0xd9b3, 0xd87b, 0xd748, 0xd61a, 0xd4f1, 0xd3cd, 0xd2ad, 0xd192, | |
1416 | 0xd07b, 0xcf69, 0xce5b, 0xcd51, 0xcc4a, 0xcb48, 0xca4a, 0xc94f, | |
1417 | 0xc858, 0xc764, 0xc674, 0xc587, 0xc49d, 0xc3b7, 0xc2d4, 0xc1f4, | |
1418 | 0xc116, 0xc03c, 0xbf65, 0xbe90, 0xbdbe, 0xbcef, 0xbc23, 0xbb59, | |
1419 | 0xba91, 0xb9cc, 0xb90a, 0xb84a, 0xb78c, 0xb6d0, 0xb617, 0xb560, | |
1420 | }; | |
1421 | ||
da10a907 RH |
1422 | #define partsN(NAME) glue(glue(glue(parts,N),_),NAME) |
1423 | #define FloatPartsN glue(FloatParts,N) | |
aca84527 | 1424 | #define FloatPartsW glue(FloatParts,W) |
da10a907 RH |
1425 | |
1426 | #define N 64 | |
aca84527 | 1427 | #define W 128 |
da10a907 RH |
1428 | |
1429 | #include "softfloat-parts-addsub.c.inc" | |
7c45bad8 RH |
1430 | #include "softfloat-parts.c.inc" |
1431 | ||
da10a907 | 1432 | #undef N |
aca84527 | 1433 | #undef W |
da10a907 | 1434 | #define N 128 |
aca84527 | 1435 | #define W 256 |
7c45bad8 | 1436 | |
da10a907 | 1437 | #include "softfloat-parts-addsub.c.inc" |
7c45bad8 RH |
1438 | #include "softfloat-parts.c.inc" |
1439 | ||
dedd123c RH |
1440 | #undef N |
1441 | #undef W | |
1442 | #define N 256 | |
1443 | ||
1444 | #include "softfloat-parts-addsub.c.inc" | |
1445 | ||
da10a907 | 1446 | #undef N |
aca84527 | 1447 | #undef W |
7c45bad8 RH |
1448 | #undef partsN |
1449 | #undef FloatPartsN | |
aca84527 | 1450 | #undef FloatPartsW |
7c45bad8 | 1451 | |
aaffb7bf RH |
1452 | /* |
1453 | * Pack/unpack routines with a specific FloatFmt. | |
1454 | */ | |
1455 | ||
98e256fc RH |
1456 | static void float16a_unpack_canonical(FloatParts64 *p, float16 f, |
1457 | float_status *s, const FloatFmt *params) | |
aaffb7bf | 1458 | { |
98e256fc | 1459 | float16_unpack_raw(p, f); |
d46975bc | 1460 | parts_canonicalize(p, s, params); |
aaffb7bf RH |
1461 | } |
1462 | ||
98e256fc RH |
1463 | static void float16_unpack_canonical(FloatParts64 *p, float16 f, |
1464 | float_status *s) | |
aaffb7bf | 1465 | { |
98e256fc | 1466 | float16a_unpack_canonical(p, f, s, &float16_params); |
aaffb7bf RH |
1467 | } |
1468 | ||
98e256fc RH |
1469 | static void bfloat16_unpack_canonical(FloatParts64 *p, bfloat16 f, |
1470 | float_status *s) | |
aaffb7bf | 1471 | { |
98e256fc | 1472 | bfloat16_unpack_raw(p, f); |
d46975bc | 1473 | parts_canonicalize(p, s, &bfloat16_params); |
aaffb7bf RH |
1474 | } |
1475 | ||
e293e927 RH |
1476 | static float16 float16a_round_pack_canonical(FloatParts64 *p, |
1477 | float_status *s, | |
aaffb7bf RH |
1478 | const FloatFmt *params) |
1479 | { | |
ee6959f2 | 1480 | parts_uncanon(p, s, params); |
e293e927 | 1481 | return float16_pack_raw(p); |
aaffb7bf RH |
1482 | } |
1483 | ||
e293e927 RH |
1484 | static float16 float16_round_pack_canonical(FloatParts64 *p, |
1485 | float_status *s) | |
aaffb7bf RH |
1486 | { |
1487 | return float16a_round_pack_canonical(p, s, &float16_params); | |
1488 | } | |
1489 | ||
e293e927 RH |
1490 | static bfloat16 bfloat16_round_pack_canonical(FloatParts64 *p, |
1491 | float_status *s) | |
aaffb7bf | 1492 | { |
ee6959f2 | 1493 | parts_uncanon(p, s, &bfloat16_params); |
e293e927 | 1494 | return bfloat16_pack_raw(p); |
aaffb7bf RH |
1495 | } |
1496 | ||
98e256fc RH |
1497 | static void float32_unpack_canonical(FloatParts64 *p, float32 f, |
1498 | float_status *s) | |
aaffb7bf | 1499 | { |
98e256fc | 1500 | float32_unpack_raw(p, f); |
d46975bc | 1501 | parts_canonicalize(p, s, &float32_params); |
aaffb7bf RH |
1502 | } |
1503 | ||
e293e927 RH |
1504 | static float32 float32_round_pack_canonical(FloatParts64 *p, |
1505 | float_status *s) | |
aaffb7bf | 1506 | { |
ee6959f2 | 1507 | parts_uncanon(p, s, &float32_params); |
e293e927 | 1508 | return float32_pack_raw(p); |
aaffb7bf RH |
1509 | } |
1510 | ||
98e256fc RH |
1511 | static void float64_unpack_canonical(FloatParts64 *p, float64 f, |
1512 | float_status *s) | |
aaffb7bf | 1513 | { |
98e256fc | 1514 | float64_unpack_raw(p, f); |
d46975bc | 1515 | parts_canonicalize(p, s, &float64_params); |
aaffb7bf RH |
1516 | } |
1517 | ||
e293e927 RH |
1518 | static float64 float64_round_pack_canonical(FloatParts64 *p, |
1519 | float_status *s) | |
aaffb7bf | 1520 | { |
ee6959f2 | 1521 | parts_uncanon(p, s, &float64_params); |
e293e927 | 1522 | return float64_pack_raw(p); |
aaffb7bf RH |
1523 | } |
1524 | ||
3ff49e56 RH |
1525 | static void float128_unpack_canonical(FloatParts128 *p, float128 f, |
1526 | float_status *s) | |
1527 | { | |
1528 | float128_unpack_raw(p, f); | |
1529 | parts_canonicalize(p, s, &float128_params); | |
1530 | } | |
1531 | ||
1532 | static float128 float128_round_pack_canonical(FloatParts128 *p, | |
1533 | float_status *s) | |
1534 | { | |
1535 | parts_uncanon(p, s, &float128_params); | |
1536 | return float128_pack_raw(p); | |
1537 | } | |
1538 | ||
6fff2167 | 1539 | /* |
da10a907 | 1540 | * Addition and subtraction |
6fff2167 AB |
1541 | */ |
1542 | ||
da10a907 RH |
1543 | static float16 QEMU_FLATTEN |
1544 | float16_addsub(float16 a, float16 b, float_status *status, bool subtract) | |
6fff2167 | 1545 | { |
da10a907 | 1546 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1547 | |
1548 | float16_unpack_canonical(&pa, a, status); | |
1549 | float16_unpack_canonical(&pb, b, status); | |
da10a907 | 1550 | pr = parts_addsub(&pa, &pb, status, subtract); |
6fff2167 | 1551 | |
da10a907 | 1552 | return float16_round_pack_canonical(pr, status); |
6fff2167 AB |
1553 | } |
1554 | ||
da10a907 | 1555 | float16 float16_add(float16 a, float16 b, float_status *status) |
1b615d48 | 1556 | { |
da10a907 RH |
1557 | return float16_addsub(a, b, status, false); |
1558 | } | |
1b615d48 | 1559 | |
da10a907 RH |
1560 | float16 float16_sub(float16 a, float16 b, float_status *status) |
1561 | { | |
1562 | return float16_addsub(a, b, status, true); | |
1b615d48 EC |
1563 | } |
1564 | ||
1565 | static float32 QEMU_SOFTFLOAT_ATTR | |
da10a907 | 1566 | soft_f32_addsub(float32 a, float32 b, float_status *status, bool subtract) |
6fff2167 | 1567 | { |
da10a907 | 1568 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1569 | |
1570 | float32_unpack_canonical(&pa, a, status); | |
1571 | float32_unpack_canonical(&pb, b, status); | |
da10a907 | 1572 | pr = parts_addsub(&pa, &pb, status, subtract); |
6fff2167 | 1573 | |
da10a907 | 1574 | return float32_round_pack_canonical(pr, status); |
6fff2167 AB |
1575 | } |
1576 | ||
da10a907 | 1577 | static float32 soft_f32_add(float32 a, float32 b, float_status *status) |
1b615d48 | 1578 | { |
da10a907 | 1579 | return soft_f32_addsub(a, b, status, false); |
1b615d48 EC |
1580 | } |
1581 | ||
da10a907 | 1582 | static float32 soft_f32_sub(float32 a, float32 b, float_status *status) |
1b615d48 | 1583 | { |
da10a907 | 1584 | return soft_f32_addsub(a, b, status, true); |
1b615d48 EC |
1585 | } |
1586 | ||
1587 | static float64 QEMU_SOFTFLOAT_ATTR | |
da10a907 | 1588 | soft_f64_addsub(float64 a, float64 b, float_status *status, bool subtract) |
6fff2167 | 1589 | { |
da10a907 | 1590 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1591 | |
1592 | float64_unpack_canonical(&pa, a, status); | |
1593 | float64_unpack_canonical(&pb, b, status); | |
da10a907 | 1594 | pr = parts_addsub(&pa, &pb, status, subtract); |
6fff2167 | 1595 | |
da10a907 | 1596 | return float64_round_pack_canonical(pr, status); |
6fff2167 AB |
1597 | } |
1598 | ||
da10a907 | 1599 | static float64 soft_f64_add(float64 a, float64 b, float_status *status) |
6fff2167 | 1600 | { |
da10a907 | 1601 | return soft_f64_addsub(a, b, status, false); |
1b615d48 | 1602 | } |
6fff2167 | 1603 | |
da10a907 | 1604 | static float64 soft_f64_sub(float64 a, float64 b, float_status *status) |
1b615d48 | 1605 | { |
da10a907 | 1606 | return soft_f64_addsub(a, b, status, true); |
6fff2167 AB |
1607 | } |
1608 | ||
1b615d48 | 1609 | static float hard_f32_add(float a, float b) |
6fff2167 | 1610 | { |
1b615d48 EC |
1611 | return a + b; |
1612 | } | |
6fff2167 | 1613 | |
1b615d48 EC |
1614 | static float hard_f32_sub(float a, float b) |
1615 | { | |
1616 | return a - b; | |
6fff2167 AB |
1617 | } |
1618 | ||
1b615d48 | 1619 | static double hard_f64_add(double a, double b) |
6fff2167 | 1620 | { |
1b615d48 EC |
1621 | return a + b; |
1622 | } | |
6fff2167 | 1623 | |
1b615d48 EC |
1624 | static double hard_f64_sub(double a, double b) |
1625 | { | |
1626 | return a - b; | |
1627 | } | |
1628 | ||
b240c9c4 | 1629 | static bool f32_addsubmul_post(union_float32 a, union_float32 b) |
1b615d48 EC |
1630 | { |
1631 | if (QEMU_HARDFLOAT_2F32_USE_FP) { | |
1632 | return !(fpclassify(a.h) == FP_ZERO && fpclassify(b.h) == FP_ZERO); | |
1633 | } | |
1634 | return !(float32_is_zero(a.s) && float32_is_zero(b.s)); | |
1635 | } | |
1636 | ||
b240c9c4 | 1637 | static bool f64_addsubmul_post(union_float64 a, union_float64 b) |
1b615d48 EC |
1638 | { |
1639 | if (QEMU_HARDFLOAT_2F64_USE_FP) { | |
1640 | return !(fpclassify(a.h) == FP_ZERO && fpclassify(b.h) == FP_ZERO); | |
1641 | } else { | |
1642 | return !(float64_is_zero(a.s) && float64_is_zero(b.s)); | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | static float32 float32_addsub(float32 a, float32 b, float_status *s, | |
1647 | hard_f32_op2_fn hard, soft_f32_op2_fn soft) | |
1648 | { | |
1649 | return float32_gen2(a, b, s, hard, soft, | |
b240c9c4 | 1650 | f32_is_zon2, f32_addsubmul_post); |
1b615d48 EC |
1651 | } |
1652 | ||
1653 | static float64 float64_addsub(float64 a, float64 b, float_status *s, | |
1654 | hard_f64_op2_fn hard, soft_f64_op2_fn soft) | |
1655 | { | |
1656 | return float64_gen2(a, b, s, hard, soft, | |
b240c9c4 | 1657 | f64_is_zon2, f64_addsubmul_post); |
1b615d48 EC |
1658 | } |
1659 | ||
1660 | float32 QEMU_FLATTEN | |
1661 | float32_add(float32 a, float32 b, float_status *s) | |
1662 | { | |
1663 | return float32_addsub(a, b, s, hard_f32_add, soft_f32_add); | |
1664 | } | |
1665 | ||
1666 | float32 QEMU_FLATTEN | |
1667 | float32_sub(float32 a, float32 b, float_status *s) | |
1668 | { | |
1669 | return float32_addsub(a, b, s, hard_f32_sub, soft_f32_sub); | |
1670 | } | |
1671 | ||
1672 | float64 QEMU_FLATTEN | |
1673 | float64_add(float64 a, float64 b, float_status *s) | |
1674 | { | |
1675 | return float64_addsub(a, b, s, hard_f64_add, soft_f64_add); | |
1676 | } | |
1677 | ||
1678 | float64 QEMU_FLATTEN | |
1679 | float64_sub(float64 a, float64 b, float_status *s) | |
1680 | { | |
1681 | return float64_addsub(a, b, s, hard_f64_sub, soft_f64_sub); | |
6fff2167 AB |
1682 | } |
1683 | ||
da10a907 RH |
1684 | static bfloat16 QEMU_FLATTEN |
1685 | bfloat16_addsub(bfloat16 a, bfloat16 b, float_status *status, bool subtract) | |
8282310d | 1686 | { |
da10a907 | 1687 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1688 | |
1689 | bfloat16_unpack_canonical(&pa, a, status); | |
1690 | bfloat16_unpack_canonical(&pb, b, status); | |
da10a907 | 1691 | pr = parts_addsub(&pa, &pb, status, subtract); |
8282310d | 1692 | |
da10a907 | 1693 | return bfloat16_round_pack_canonical(pr, status); |
8282310d LZ |
1694 | } |
1695 | ||
da10a907 | 1696 | bfloat16 bfloat16_add(bfloat16 a, bfloat16 b, float_status *status) |
8282310d | 1697 | { |
da10a907 RH |
1698 | return bfloat16_addsub(a, b, status, false); |
1699 | } | |
8282310d | 1700 | |
da10a907 RH |
1701 | bfloat16 bfloat16_sub(bfloat16 a, bfloat16 b, float_status *status) |
1702 | { | |
1703 | return bfloat16_addsub(a, b, status, true); | |
8282310d LZ |
1704 | } |
1705 | ||
3ff49e56 RH |
1706 | static float128 QEMU_FLATTEN |
1707 | float128_addsub(float128 a, float128 b, float_status *status, bool subtract) | |
1708 | { | |
1709 | FloatParts128 pa, pb, *pr; | |
1710 | ||
1711 | float128_unpack_canonical(&pa, a, status); | |
1712 | float128_unpack_canonical(&pb, b, status); | |
1713 | pr = parts_addsub(&pa, &pb, status, subtract); | |
1714 | ||
1715 | return float128_round_pack_canonical(pr, status); | |
1716 | } | |
1717 | ||
1718 | float128 float128_add(float128 a, float128 b, float_status *status) | |
1719 | { | |
1720 | return float128_addsub(a, b, status, false); | |
1721 | } | |
1722 | ||
1723 | float128 float128_sub(float128 a, float128 b, float_status *status) | |
1724 | { | |
1725 | return float128_addsub(a, b, status, true); | |
1726 | } | |
1727 | ||
74d707e2 | 1728 | /* |
aca84527 | 1729 | * Multiplication |
74d707e2 AB |
1730 | */ |
1731 | ||
97ff87c0 | 1732 | float16 QEMU_FLATTEN float16_mul(float16 a, float16 b, float_status *status) |
74d707e2 | 1733 | { |
aca84527 | 1734 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1735 | |
1736 | float16_unpack_canonical(&pa, a, status); | |
1737 | float16_unpack_canonical(&pb, b, status); | |
aca84527 | 1738 | pr = parts_mul(&pa, &pb, status); |
74d707e2 | 1739 | |
aca84527 | 1740 | return float16_round_pack_canonical(pr, status); |
74d707e2 AB |
1741 | } |
1742 | ||
2dfabc86 EC |
1743 | static float32 QEMU_SOFTFLOAT_ATTR |
1744 | soft_f32_mul(float32 a, float32 b, float_status *status) | |
74d707e2 | 1745 | { |
aca84527 | 1746 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1747 | |
1748 | float32_unpack_canonical(&pa, a, status); | |
1749 | float32_unpack_canonical(&pb, b, status); | |
aca84527 | 1750 | pr = parts_mul(&pa, &pb, status); |
74d707e2 | 1751 | |
aca84527 | 1752 | return float32_round_pack_canonical(pr, status); |
74d707e2 AB |
1753 | } |
1754 | ||
2dfabc86 EC |
1755 | static float64 QEMU_SOFTFLOAT_ATTR |
1756 | soft_f64_mul(float64 a, float64 b, float_status *status) | |
74d707e2 | 1757 | { |
aca84527 | 1758 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1759 | |
1760 | float64_unpack_canonical(&pa, a, status); | |
1761 | float64_unpack_canonical(&pb, b, status); | |
aca84527 | 1762 | pr = parts_mul(&pa, &pb, status); |
74d707e2 | 1763 | |
aca84527 | 1764 | return float64_round_pack_canonical(pr, status); |
74d707e2 AB |
1765 | } |
1766 | ||
2dfabc86 EC |
1767 | static float hard_f32_mul(float a, float b) |
1768 | { | |
1769 | return a * b; | |
1770 | } | |
1771 | ||
1772 | static double hard_f64_mul(double a, double b) | |
1773 | { | |
1774 | return a * b; | |
1775 | } | |
1776 | ||
2dfabc86 EC |
1777 | float32 QEMU_FLATTEN |
1778 | float32_mul(float32 a, float32 b, float_status *s) | |
1779 | { | |
1780 | return float32_gen2(a, b, s, hard_f32_mul, soft_f32_mul, | |
b240c9c4 | 1781 | f32_is_zon2, f32_addsubmul_post); |
2dfabc86 EC |
1782 | } |
1783 | ||
1784 | float64 QEMU_FLATTEN | |
1785 | float64_mul(float64 a, float64 b, float_status *s) | |
1786 | { | |
1787 | return float64_gen2(a, b, s, hard_f64_mul, soft_f64_mul, | |
b240c9c4 | 1788 | f64_is_zon2, f64_addsubmul_post); |
2dfabc86 EC |
1789 | } |
1790 | ||
aca84527 RH |
1791 | bfloat16 QEMU_FLATTEN |
1792 | bfloat16_mul(bfloat16 a, bfloat16 b, float_status *status) | |
8282310d | 1793 | { |
aca84527 | 1794 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
1795 | |
1796 | bfloat16_unpack_canonical(&pa, a, status); | |
1797 | bfloat16_unpack_canonical(&pb, b, status); | |
aca84527 | 1798 | pr = parts_mul(&pa, &pb, status); |
8282310d | 1799 | |
aca84527 RH |
1800 | return bfloat16_round_pack_canonical(pr, status); |
1801 | } | |
1802 | ||
1803 | float128 QEMU_FLATTEN | |
1804 | float128_mul(float128 a, float128 b, float_status *status) | |
1805 | { | |
1806 | FloatParts128 pa, pb, *pr; | |
1807 | ||
1808 | float128_unpack_canonical(&pa, a, status); | |
1809 | float128_unpack_canonical(&pb, b, status); | |
1810 | pr = parts_mul(&pa, &pb, status); | |
1811 | ||
1812 | return float128_round_pack_canonical(pr, status); | |
8282310d LZ |
1813 | } |
1814 | ||
d446830a | 1815 | /* |
dedd123c | 1816 | * Fused multiply-add |
d446830a AB |
1817 | */ |
1818 | ||
97ff87c0 | 1819 | float16 QEMU_FLATTEN float16_muladd(float16 a, float16 b, float16 c, |
dedd123c | 1820 | int flags, float_status *status) |
d446830a | 1821 | { |
dedd123c | 1822 | FloatParts64 pa, pb, pc, *pr; |
98e256fc RH |
1823 | |
1824 | float16_unpack_canonical(&pa, a, status); | |
1825 | float16_unpack_canonical(&pb, b, status); | |
1826 | float16_unpack_canonical(&pc, c, status); | |
dedd123c | 1827 | pr = parts_muladd(&pa, &pb, &pc, flags, status); |
d446830a | 1828 | |
dedd123c | 1829 | return float16_round_pack_canonical(pr, status); |
d446830a AB |
1830 | } |
1831 | ||
ccf770ba EC |
1832 | static float32 QEMU_SOFTFLOAT_ATTR |
1833 | soft_f32_muladd(float32 a, float32 b, float32 c, int flags, | |
1834 | float_status *status) | |
d446830a | 1835 | { |
dedd123c | 1836 | FloatParts64 pa, pb, pc, *pr; |
98e256fc RH |
1837 | |
1838 | float32_unpack_canonical(&pa, a, status); | |
1839 | float32_unpack_canonical(&pb, b, status); | |
1840 | float32_unpack_canonical(&pc, c, status); | |
dedd123c | 1841 | pr = parts_muladd(&pa, &pb, &pc, flags, status); |
d446830a | 1842 | |
dedd123c | 1843 | return float32_round_pack_canonical(pr, status); |
d446830a AB |
1844 | } |
1845 | ||
ccf770ba EC |
1846 | static float64 QEMU_SOFTFLOAT_ATTR |
1847 | soft_f64_muladd(float64 a, float64 b, float64 c, int flags, | |
1848 | float_status *status) | |
d446830a | 1849 | { |
dedd123c | 1850 | FloatParts64 pa, pb, pc, *pr; |
98e256fc RH |
1851 | |
1852 | float64_unpack_canonical(&pa, a, status); | |
1853 | float64_unpack_canonical(&pb, b, status); | |
1854 | float64_unpack_canonical(&pc, c, status); | |
dedd123c | 1855 | pr = parts_muladd(&pa, &pb, &pc, flags, status); |
d446830a | 1856 | |
dedd123c | 1857 | return float64_round_pack_canonical(pr, status); |
d446830a AB |
1858 | } |
1859 | ||
f6b3b108 EC |
1860 | static bool force_soft_fma; |
1861 | ||
ccf770ba EC |
1862 | float32 QEMU_FLATTEN |
1863 | float32_muladd(float32 xa, float32 xb, float32 xc, int flags, float_status *s) | |
1864 | { | |
1865 | union_float32 ua, ub, uc, ur; | |
1866 | ||
1867 | ua.s = xa; | |
1868 | ub.s = xb; | |
1869 | uc.s = xc; | |
1870 | ||
1871 | if (unlikely(!can_use_fpu(s))) { | |
1872 | goto soft; | |
1873 | } | |
1874 | if (unlikely(flags & float_muladd_halve_result)) { | |
1875 | goto soft; | |
1876 | } | |
1877 | ||
1878 | float32_input_flush3(&ua.s, &ub.s, &uc.s, s); | |
1879 | if (unlikely(!f32_is_zon3(ua, ub, uc))) { | |
1880 | goto soft; | |
1881 | } | |
f6b3b108 EC |
1882 | |
1883 | if (unlikely(force_soft_fma)) { | |
1884 | goto soft; | |
1885 | } | |
1886 | ||
ccf770ba EC |
1887 | /* |
1888 | * When (a || b) == 0, there's no need to check for under/over flow, | |
1889 | * since we know the addend is (normal || 0) and the product is 0. | |
1890 | */ | |
1891 | if (float32_is_zero(ua.s) || float32_is_zero(ub.s)) { | |
1892 | union_float32 up; | |
1893 | bool prod_sign; | |
1894 | ||
1895 | prod_sign = float32_is_neg(ua.s) ^ float32_is_neg(ub.s); | |
1896 | prod_sign ^= !!(flags & float_muladd_negate_product); | |
1897 | up.s = float32_set_sign(float32_zero, prod_sign); | |
1898 | ||
1899 | if (flags & float_muladd_negate_c) { | |
1900 | uc.h = -uc.h; | |
1901 | } | |
1902 | ur.h = up.h + uc.h; | |
1903 | } else { | |
896f51fb KC |
1904 | union_float32 ua_orig = ua; |
1905 | union_float32 uc_orig = uc; | |
1906 | ||
ccf770ba EC |
1907 | if (flags & float_muladd_negate_product) { |
1908 | ua.h = -ua.h; | |
1909 | } | |
1910 | if (flags & float_muladd_negate_c) { | |
1911 | uc.h = -uc.h; | |
1912 | } | |
1913 | ||
1914 | ur.h = fmaf(ua.h, ub.h, uc.h); | |
1915 | ||
1916 | if (unlikely(f32_is_inf(ur))) { | |
d82f3b2d | 1917 | float_raise(float_flag_overflow, s); |
ccf770ba | 1918 | } else if (unlikely(fabsf(ur.h) <= FLT_MIN)) { |
896f51fb KC |
1919 | ua = ua_orig; |
1920 | uc = uc_orig; | |
ccf770ba EC |
1921 | goto soft; |
1922 | } | |
1923 | } | |
1924 | if (flags & float_muladd_negate_result) { | |
1925 | return float32_chs(ur.s); | |
1926 | } | |
1927 | return ur.s; | |
1928 | ||
1929 | soft: | |
1930 | return soft_f32_muladd(ua.s, ub.s, uc.s, flags, s); | |
1931 | } | |
1932 | ||
1933 | float64 QEMU_FLATTEN | |
1934 | float64_muladd(float64 xa, float64 xb, float64 xc, int flags, float_status *s) | |
1935 | { | |
1936 | union_float64 ua, ub, uc, ur; | |
1937 | ||
1938 | ua.s = xa; | |
1939 | ub.s = xb; | |
1940 | uc.s = xc; | |
1941 | ||
1942 | if (unlikely(!can_use_fpu(s))) { | |
1943 | goto soft; | |
1944 | } | |
1945 | if (unlikely(flags & float_muladd_halve_result)) { | |
1946 | goto soft; | |
1947 | } | |
1948 | ||
1949 | float64_input_flush3(&ua.s, &ub.s, &uc.s, s); | |
1950 | if (unlikely(!f64_is_zon3(ua, ub, uc))) { | |
1951 | goto soft; | |
1952 | } | |
f6b3b108 EC |
1953 | |
1954 | if (unlikely(force_soft_fma)) { | |
1955 | goto soft; | |
1956 | } | |
1957 | ||
ccf770ba EC |
1958 | /* |
1959 | * When (a || b) == 0, there's no need to check for under/over flow, | |
1960 | * since we know the addend is (normal || 0) and the product is 0. | |
1961 | */ | |
1962 | if (float64_is_zero(ua.s) || float64_is_zero(ub.s)) { | |
1963 | union_float64 up; | |
1964 | bool prod_sign; | |
1965 | ||
1966 | prod_sign = float64_is_neg(ua.s) ^ float64_is_neg(ub.s); | |
1967 | prod_sign ^= !!(flags & float_muladd_negate_product); | |
1968 | up.s = float64_set_sign(float64_zero, prod_sign); | |
1969 | ||
1970 | if (flags & float_muladd_negate_c) { | |
1971 | uc.h = -uc.h; | |
1972 | } | |
1973 | ur.h = up.h + uc.h; | |
1974 | } else { | |
896f51fb KC |
1975 | union_float64 ua_orig = ua; |
1976 | union_float64 uc_orig = uc; | |
1977 | ||
ccf770ba EC |
1978 | if (flags & float_muladd_negate_product) { |
1979 | ua.h = -ua.h; | |
1980 | } | |
1981 | if (flags & float_muladd_negate_c) { | |
1982 | uc.h = -uc.h; | |
1983 | } | |
1984 | ||
1985 | ur.h = fma(ua.h, ub.h, uc.h); | |
1986 | ||
1987 | if (unlikely(f64_is_inf(ur))) { | |
d82f3b2d | 1988 | float_raise(float_flag_overflow, s); |
ccf770ba | 1989 | } else if (unlikely(fabs(ur.h) <= FLT_MIN)) { |
896f51fb KC |
1990 | ua = ua_orig; |
1991 | uc = uc_orig; | |
ccf770ba EC |
1992 | goto soft; |
1993 | } | |
1994 | } | |
1995 | if (flags & float_muladd_negate_result) { | |
1996 | return float64_chs(ur.s); | |
1997 | } | |
1998 | return ur.s; | |
1999 | ||
2000 | soft: | |
2001 | return soft_f64_muladd(ua.s, ub.s, uc.s, flags, s); | |
2002 | } | |
2003 | ||
8282310d LZ |
2004 | bfloat16 QEMU_FLATTEN bfloat16_muladd(bfloat16 a, bfloat16 b, bfloat16 c, |
2005 | int flags, float_status *status) | |
2006 | { | |
dedd123c | 2007 | FloatParts64 pa, pb, pc, *pr; |
98e256fc RH |
2008 | |
2009 | bfloat16_unpack_canonical(&pa, a, status); | |
2010 | bfloat16_unpack_canonical(&pb, b, status); | |
2011 | bfloat16_unpack_canonical(&pc, c, status); | |
dedd123c RH |
2012 | pr = parts_muladd(&pa, &pb, &pc, flags, status); |
2013 | ||
2014 | return bfloat16_round_pack_canonical(pr, status); | |
2015 | } | |
8282310d | 2016 | |
dedd123c RH |
2017 | float128 QEMU_FLATTEN float128_muladd(float128 a, float128 b, float128 c, |
2018 | int flags, float_status *status) | |
2019 | { | |
2020 | FloatParts128 pa, pb, pc, *pr; | |
2021 | ||
2022 | float128_unpack_canonical(&pa, a, status); | |
2023 | float128_unpack_canonical(&pb, b, status); | |
2024 | float128_unpack_canonical(&pc, c, status); | |
2025 | pr = parts_muladd(&pa, &pb, &pc, flags, status); | |
2026 | ||
2027 | return float128_round_pack_canonical(pr, status); | |
8282310d LZ |
2028 | } |
2029 | ||
cf07323d | 2030 | /* |
ec961b81 | 2031 | * Division |
cf07323d AB |
2032 | */ |
2033 | ||
cf07323d AB |
2034 | float16 float16_div(float16 a, float16 b, float_status *status) |
2035 | { | |
ec961b81 | 2036 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
2037 | |
2038 | float16_unpack_canonical(&pa, a, status); | |
2039 | float16_unpack_canonical(&pb, b, status); | |
ec961b81 | 2040 | pr = parts_div(&pa, &pb, status); |
cf07323d | 2041 | |
ec961b81 | 2042 | return float16_round_pack_canonical(pr, status); |
cf07323d AB |
2043 | } |
2044 | ||
4a629561 EC |
2045 | static float32 QEMU_SOFTFLOAT_ATTR |
2046 | soft_f32_div(float32 a, float32 b, float_status *status) | |
cf07323d | 2047 | { |
ec961b81 | 2048 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
2049 | |
2050 | float32_unpack_canonical(&pa, a, status); | |
2051 | float32_unpack_canonical(&pb, b, status); | |
ec961b81 | 2052 | pr = parts_div(&pa, &pb, status); |
cf07323d | 2053 | |
ec961b81 | 2054 | return float32_round_pack_canonical(pr, status); |
cf07323d AB |
2055 | } |
2056 | ||
4a629561 EC |
2057 | static float64 QEMU_SOFTFLOAT_ATTR |
2058 | soft_f64_div(float64 a, float64 b, float_status *status) | |
cf07323d | 2059 | { |
ec961b81 | 2060 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
2061 | |
2062 | float64_unpack_canonical(&pa, a, status); | |
2063 | float64_unpack_canonical(&pb, b, status); | |
ec961b81 | 2064 | pr = parts_div(&pa, &pb, status); |
cf07323d | 2065 | |
ec961b81 | 2066 | return float64_round_pack_canonical(pr, status); |
cf07323d AB |
2067 | } |
2068 | ||
4a629561 EC |
2069 | static float hard_f32_div(float a, float b) |
2070 | { | |
2071 | return a / b; | |
2072 | } | |
2073 | ||
2074 | static double hard_f64_div(double a, double b) | |
2075 | { | |
2076 | return a / b; | |
2077 | } | |
2078 | ||
2079 | static bool f32_div_pre(union_float32 a, union_float32 b) | |
2080 | { | |
2081 | if (QEMU_HARDFLOAT_2F32_USE_FP) { | |
2082 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
2083 | fpclassify(b.h) == FP_NORMAL; | |
2084 | } | |
2085 | return float32_is_zero_or_normal(a.s) && float32_is_normal(b.s); | |
2086 | } | |
2087 | ||
2088 | static bool f64_div_pre(union_float64 a, union_float64 b) | |
2089 | { | |
2090 | if (QEMU_HARDFLOAT_2F64_USE_FP) { | |
2091 | return (fpclassify(a.h) == FP_NORMAL || fpclassify(a.h) == FP_ZERO) && | |
2092 | fpclassify(b.h) == FP_NORMAL; | |
2093 | } | |
2094 | return float64_is_zero_or_normal(a.s) && float64_is_normal(b.s); | |
2095 | } | |
2096 | ||
2097 | static bool f32_div_post(union_float32 a, union_float32 b) | |
2098 | { | |
2099 | if (QEMU_HARDFLOAT_2F32_USE_FP) { | |
2100 | return fpclassify(a.h) != FP_ZERO; | |
2101 | } | |
2102 | return !float32_is_zero(a.s); | |
2103 | } | |
2104 | ||
2105 | static bool f64_div_post(union_float64 a, union_float64 b) | |
2106 | { | |
2107 | if (QEMU_HARDFLOAT_2F64_USE_FP) { | |
2108 | return fpclassify(a.h) != FP_ZERO; | |
2109 | } | |
2110 | return !float64_is_zero(a.s); | |
2111 | } | |
2112 | ||
2113 | float32 QEMU_FLATTEN | |
2114 | float32_div(float32 a, float32 b, float_status *s) | |
2115 | { | |
2116 | return float32_gen2(a, b, s, hard_f32_div, soft_f32_div, | |
b240c9c4 | 2117 | f32_div_pre, f32_div_post); |
4a629561 EC |
2118 | } |
2119 | ||
2120 | float64 QEMU_FLATTEN | |
2121 | float64_div(float64 a, float64 b, float_status *s) | |
2122 | { | |
2123 | return float64_gen2(a, b, s, hard_f64_div, soft_f64_div, | |
b240c9c4 | 2124 | f64_div_pre, f64_div_post); |
4a629561 EC |
2125 | } |
2126 | ||
ec961b81 RH |
2127 | bfloat16 QEMU_FLATTEN |
2128 | bfloat16_div(bfloat16 a, bfloat16 b, float_status *status) | |
8282310d | 2129 | { |
ec961b81 | 2130 | FloatParts64 pa, pb, *pr; |
98e256fc RH |
2131 | |
2132 | bfloat16_unpack_canonical(&pa, a, status); | |
2133 | bfloat16_unpack_canonical(&pb, b, status); | |
ec961b81 | 2134 | pr = parts_div(&pa, &pb, status); |
8282310d | 2135 | |
ec961b81 RH |
2136 | return bfloat16_round_pack_canonical(pr, status); |
2137 | } | |
2138 | ||
2139 | float128 QEMU_FLATTEN | |
2140 | float128_div(float128 a, float128 b, float_status *status) | |
2141 | { | |
2142 | FloatParts128 pa, pb, *pr; | |
2143 | ||
2144 | float128_unpack_canonical(&pa, a, status); | |
2145 | float128_unpack_canonical(&pb, b, status); | |
2146 | pr = parts_div(&pa, &pb, status); | |
2147 | ||
2148 | return float128_round_pack_canonical(pr, status); | |
8282310d LZ |
2149 | } |
2150 | ||
6fed16b2 AB |
2151 | /* |
2152 | * Float to Float conversions | |
2153 | * | |
2154 | * Returns the result of converting one float format to another. The | |
2155 | * conversion is performed according to the IEC/IEEE Standard for | |
2156 | * Binary Floating-Point Arithmetic. | |
2157 | * | |
c3f1875e RH |
2158 | * Usually this only needs to take care of raising invalid exceptions |
2159 | * and handling the conversion on NaNs. | |
6fed16b2 AB |
2160 | */ |
2161 | ||
c3f1875e RH |
2162 | static void parts_float_to_ahp(FloatParts64 *a, float_status *s) |
2163 | { | |
2164 | switch (a->cls) { | |
2165 | case float_class_qnan: | |
2166 | case float_class_snan: | |
2167 | /* | |
2168 | * There is no NaN in the destination format. Raise Invalid | |
2169 | * and return a zero with the sign of the input NaN. | |
2170 | */ | |
2171 | float_raise(float_flag_invalid, s); | |
2172 | a->cls = float_class_zero; | |
2173 | break; | |
2174 | ||
2175 | case float_class_inf: | |
2176 | /* | |
2177 | * There is no Inf in the destination format. Raise Invalid | |
2178 | * and return the maximum normal with the correct sign. | |
2179 | */ | |
2180 | float_raise(float_flag_invalid, s); | |
2181 | a->cls = float_class_normal; | |
2182 | a->exp = float16_params_ahp.exp_max; | |
2183 | a->frac = MAKE_64BIT_MASK(float16_params_ahp.frac_shift, | |
2184 | float16_params_ahp.frac_size + 1); | |
2185 | break; | |
2186 | ||
2187 | case float_class_normal: | |
2188 | case float_class_zero: | |
2189 | break; | |
2190 | ||
2191 | default: | |
2192 | g_assert_not_reached(); | |
2193 | } | |
2194 | } | |
2195 | ||
2196 | static void parts64_float_to_float(FloatParts64 *a, float_status *s) | |
2197 | { | |
2198 | if (is_nan(a->cls)) { | |
2199 | parts_return_nan(a, s); | |
6fed16b2 | 2200 | } |
6fed16b2 AB |
2201 | } |
2202 | ||
c3f1875e RH |
2203 | static void parts128_float_to_float(FloatParts128 *a, float_status *s) |
2204 | { | |
2205 | if (is_nan(a->cls)) { | |
2206 | parts_return_nan(a, s); | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | #define parts_float_to_float(P, S) \ | |
2211 | PARTS_GENERIC_64_128(float_to_float, P)(P, S) | |
2212 | ||
9882ccaf RH |
2213 | static void parts_float_to_float_narrow(FloatParts64 *a, FloatParts128 *b, |
2214 | float_status *s) | |
2215 | { | |
2216 | a->cls = b->cls; | |
2217 | a->sign = b->sign; | |
2218 | a->exp = b->exp; | |
2219 | ||
2220 | if (a->cls == float_class_normal) { | |
2221 | frac_truncjam(a, b); | |
2222 | } else if (is_nan(a->cls)) { | |
2223 | /* Discard the low bits of the NaN. */ | |
2224 | a->frac = b->frac_hi; | |
2225 | parts_return_nan(a, s); | |
2226 | } | |
2227 | } | |
2228 | ||
2229 | static void parts_float_to_float_widen(FloatParts128 *a, FloatParts64 *b, | |
2230 | float_status *s) | |
2231 | { | |
2232 | a->cls = b->cls; | |
2233 | a->sign = b->sign; | |
2234 | a->exp = b->exp; | |
2235 | frac_widen(a, b); | |
2236 | ||
2237 | if (is_nan(a->cls)) { | |
2238 | parts_return_nan(a, s); | |
2239 | } | |
2240 | } | |
2241 | ||
6fed16b2 AB |
2242 | float32 float16_to_float32(float16 a, bool ieee, float_status *s) |
2243 | { | |
2244 | const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp; | |
c3f1875e | 2245 | FloatParts64 p; |
98e256fc | 2246 | |
c3f1875e RH |
2247 | float16a_unpack_canonical(&p, a, s, fmt16); |
2248 | parts_float_to_float(&p, s); | |
2249 | return float32_round_pack_canonical(&p, s); | |
6fed16b2 AB |
2250 | } |
2251 | ||
2252 | float64 float16_to_float64(float16 a, bool ieee, float_status *s) | |
2253 | { | |
2254 | const FloatFmt *fmt16 = ieee ? &float16_params : &float16_params_ahp; | |
c3f1875e | 2255 | FloatParts64 p; |
98e256fc | 2256 | |
c3f1875e RH |
2257 | float16a_unpack_canonical(&p, a, s, fmt16); |
2258 | parts_float_to_float(&p, s); | |
2259 | return float64_round_pack_canonical(&p, s); | |
6fed16b2 AB |
2260 | } |
2261 | ||
2262 | float16 float32_to_float16(float32 a, bool ieee, float_status *s) | |
2263 | { | |
c3f1875e RH |
2264 | FloatParts64 p; |
2265 | const FloatFmt *fmt; | |
98e256fc | 2266 | |
c3f1875e RH |
2267 | float32_unpack_canonical(&p, a, s); |
2268 | if (ieee) { | |
2269 | parts_float_to_float(&p, s); | |
2270 | fmt = &float16_params; | |
2271 | } else { | |
2272 | parts_float_to_ahp(&p, s); | |
2273 | fmt = &float16_params_ahp; | |
2274 | } | |
2275 | return float16a_round_pack_canonical(&p, s, fmt); | |
6fed16b2 AB |
2276 | } |
2277 | ||
21381dcf MK |
2278 | static float64 QEMU_SOFTFLOAT_ATTR |
2279 | soft_float32_to_float64(float32 a, float_status *s) | |
6fed16b2 | 2280 | { |
c3f1875e | 2281 | FloatParts64 p; |
98e256fc | 2282 | |
c3f1875e RH |
2283 | float32_unpack_canonical(&p, a, s); |
2284 | parts_float_to_float(&p, s); | |
2285 | return float64_round_pack_canonical(&p, s); | |
6fed16b2 AB |
2286 | } |
2287 | ||
21381dcf MK |
2288 | float64 float32_to_float64(float32 a, float_status *s) |
2289 | { | |
2290 | if (likely(float32_is_normal(a))) { | |
2291 | /* Widening conversion can never produce inexact results. */ | |
2292 | union_float32 uf; | |
2293 | union_float64 ud; | |
2294 | uf.s = a; | |
2295 | ud.h = uf.h; | |
2296 | return ud.s; | |
2297 | } else if (float32_is_zero(a)) { | |
2298 | return float64_set_sign(float64_zero, float32_is_neg(a)); | |
2299 | } else { | |
2300 | return soft_float32_to_float64(a, s); | |
2301 | } | |
2302 | } | |
2303 | ||
6fed16b2 AB |
2304 | float16 float64_to_float16(float64 a, bool ieee, float_status *s) |
2305 | { | |
c3f1875e RH |
2306 | FloatParts64 p; |
2307 | const FloatFmt *fmt; | |
98e256fc | 2308 | |
c3f1875e RH |
2309 | float64_unpack_canonical(&p, a, s); |
2310 | if (ieee) { | |
2311 | parts_float_to_float(&p, s); | |
2312 | fmt = &float16_params; | |
2313 | } else { | |
2314 | parts_float_to_ahp(&p, s); | |
2315 | fmt = &float16_params_ahp; | |
2316 | } | |
2317 | return float16a_round_pack_canonical(&p, s, fmt); | |
6fed16b2 AB |
2318 | } |
2319 | ||
2320 | float32 float64_to_float32(float64 a, float_status *s) | |
2321 | { | |
c3f1875e | 2322 | FloatParts64 p; |
98e256fc | 2323 | |
c3f1875e RH |
2324 | float64_unpack_canonical(&p, a, s); |
2325 | parts_float_to_float(&p, s); | |
2326 | return float32_round_pack_canonical(&p, s); | |
6fed16b2 AB |
2327 | } |
2328 | ||
34f0c0a9 LZ |
2329 | float32 bfloat16_to_float32(bfloat16 a, float_status *s) |
2330 | { | |
c3f1875e | 2331 | FloatParts64 p; |
98e256fc | 2332 | |
c3f1875e RH |
2333 | bfloat16_unpack_canonical(&p, a, s); |
2334 | parts_float_to_float(&p, s); | |
2335 | return float32_round_pack_canonical(&p, s); | |
34f0c0a9 LZ |
2336 | } |
2337 | ||
2338 | float64 bfloat16_to_float64(bfloat16 a, float_status *s) | |
2339 | { | |
c3f1875e | 2340 | FloatParts64 p; |
98e256fc | 2341 | |
c3f1875e RH |
2342 | bfloat16_unpack_canonical(&p, a, s); |
2343 | parts_float_to_float(&p, s); | |
2344 | return float64_round_pack_canonical(&p, s); | |
34f0c0a9 LZ |
2345 | } |
2346 | ||
2347 | bfloat16 float32_to_bfloat16(float32 a, float_status *s) | |
2348 | { | |
c3f1875e | 2349 | FloatParts64 p; |
98e256fc | 2350 | |
c3f1875e RH |
2351 | float32_unpack_canonical(&p, a, s); |
2352 | parts_float_to_float(&p, s); | |
2353 | return bfloat16_round_pack_canonical(&p, s); | |
34f0c0a9 LZ |
2354 | } |
2355 | ||
2356 | bfloat16 float64_to_bfloat16(float64 a, float_status *s) | |
2357 | { | |
c3f1875e | 2358 | FloatParts64 p; |
98e256fc | 2359 | |
c3f1875e RH |
2360 | float64_unpack_canonical(&p, a, s); |
2361 | parts_float_to_float(&p, s); | |
2362 | return bfloat16_round_pack_canonical(&p, s); | |
34f0c0a9 LZ |
2363 | } |
2364 | ||
9882ccaf RH |
2365 | float32 float128_to_float32(float128 a, float_status *s) |
2366 | { | |
2367 | FloatParts64 p64; | |
2368 | FloatParts128 p128; | |
2369 | ||
2370 | float128_unpack_canonical(&p128, a, s); | |
2371 | parts_float_to_float_narrow(&p64, &p128, s); | |
2372 | return float32_round_pack_canonical(&p64, s); | |
2373 | } | |
2374 | ||
2375 | float64 float128_to_float64(float128 a, float_status *s) | |
2376 | { | |
2377 | FloatParts64 p64; | |
2378 | FloatParts128 p128; | |
2379 | ||
2380 | float128_unpack_canonical(&p128, a, s); | |
2381 | parts_float_to_float_narrow(&p64, &p128, s); | |
2382 | return float64_round_pack_canonical(&p64, s); | |
2383 | } | |
2384 | ||
2385 | float128 float32_to_float128(float32 a, float_status *s) | |
2386 | { | |
2387 | FloatParts64 p64; | |
2388 | FloatParts128 p128; | |
2389 | ||
2390 | float32_unpack_canonical(&p64, a, s); | |
2391 | parts_float_to_float_widen(&p128, &p64, s); | |
2392 | return float128_round_pack_canonical(&p128, s); | |
2393 | } | |
2394 | ||
2395 | float128 float64_to_float128(float64 a, float_status *s) | |
2396 | { | |
2397 | FloatParts64 p64; | |
2398 | FloatParts128 p128; | |
2399 | ||
2400 | float64_unpack_canonical(&p64, a, s); | |
2401 | parts_float_to_float_widen(&p128, &p64, s); | |
2402 | return float128_round_pack_canonical(&p128, s); | |
2403 | } | |
2404 | ||
dbe4d53a | 2405 | /* |
afc34931 | 2406 | * Round to integral value |
dbe4d53a AB |
2407 | */ |
2408 | ||
dbe4d53a AB |
2409 | float16 float16_round_to_int(float16 a, float_status *s) |
2410 | { | |
afc34931 | 2411 | FloatParts64 p; |
98e256fc | 2412 | |
afc34931 RH |
2413 | float16_unpack_canonical(&p, a, s); |
2414 | parts_round_to_int(&p, s->float_rounding_mode, 0, s, &float16_params); | |
2415 | return float16_round_pack_canonical(&p, s); | |
dbe4d53a AB |
2416 | } |
2417 | ||
2418 | float32 float32_round_to_int(float32 a, float_status *s) | |
2419 | { | |
afc34931 | 2420 | FloatParts64 p; |
98e256fc | 2421 | |
afc34931 RH |
2422 | float32_unpack_canonical(&p, a, s); |
2423 | parts_round_to_int(&p, s->float_rounding_mode, 0, s, &float32_params); | |
2424 | return float32_round_pack_canonical(&p, s); | |
dbe4d53a AB |
2425 | } |
2426 | ||
2427 | float64 float64_round_to_int(float64 a, float_status *s) | |
2428 | { | |
afc34931 | 2429 | FloatParts64 p; |
98e256fc | 2430 | |
afc34931 RH |
2431 | float64_unpack_canonical(&p, a, s); |
2432 | parts_round_to_int(&p, s->float_rounding_mode, 0, s, &float64_params); | |
2433 | return float64_round_pack_canonical(&p, s); | |
dbe4d53a AB |
2434 | } |
2435 | ||
34f0c0a9 LZ |
2436 | bfloat16 bfloat16_round_to_int(bfloat16 a, float_status *s) |
2437 | { | |
afc34931 | 2438 | FloatParts64 p; |
98e256fc | 2439 | |
afc34931 RH |
2440 | bfloat16_unpack_canonical(&p, a, s); |
2441 | parts_round_to_int(&p, s->float_rounding_mode, 0, s, &bfloat16_params); | |
2442 | return bfloat16_round_pack_canonical(&p, s); | |
2443 | } | |
2444 | ||
2445 | float128 float128_round_to_int(float128 a, float_status *s) | |
2446 | { | |
2447 | FloatParts128 p; | |
2448 | ||
2449 | float128_unpack_canonical(&p, a, s); | |
2450 | parts_round_to_int(&p, s->float_rounding_mode, 0, s, &float128_params); | |
2451 | return float128_round_pack_canonical(&p, s); | |
34f0c0a9 LZ |
2452 | } |
2453 | ||
ab52f973 | 2454 | /* |
463b3f0d RH |
2455 | * Floating-point to signed integer conversions |
2456 | */ | |
ab52f973 | 2457 | |
0d93d8ec FC |
2458 | int8_t float16_to_int8_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2459 | float_status *s) | |
2460 | { | |
98e256fc RH |
2461 | FloatParts64 p; |
2462 | ||
2463 | float16_unpack_canonical(&p, a, s); | |
463b3f0d | 2464 | return parts_float_to_sint(&p, rmode, scale, INT8_MIN, INT8_MAX, s); |
0d93d8ec FC |
2465 | } |
2466 | ||
3dede407 | 2467 | int16_t float16_to_int16_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2468 | float_status *s) |
2469 | { | |
98e256fc RH |
2470 | FloatParts64 p; |
2471 | ||
2472 | float16_unpack_canonical(&p, a, s); | |
463b3f0d | 2473 | return parts_float_to_sint(&p, rmode, scale, INT16_MIN, INT16_MAX, s); |
2f6c74be RH |
2474 | } |
2475 | ||
3dede407 | 2476 | int32_t float16_to_int32_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2477 | float_status *s) |
2478 | { | |
98e256fc RH |
2479 | FloatParts64 p; |
2480 | ||
2481 | float16_unpack_canonical(&p, a, s); | |
463b3f0d | 2482 | return parts_float_to_sint(&p, rmode, scale, INT32_MIN, INT32_MAX, s); |
2f6c74be RH |
2483 | } |
2484 | ||
3dede407 | 2485 | int64_t float16_to_int64_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2486 | float_status *s) |
2487 | { | |
98e256fc RH |
2488 | FloatParts64 p; |
2489 | ||
2490 | float16_unpack_canonical(&p, a, s); | |
463b3f0d | 2491 | return parts_float_to_sint(&p, rmode, scale, INT64_MIN, INT64_MAX, s); |
2f6c74be RH |
2492 | } |
2493 | ||
3dede407 | 2494 | int16_t float32_to_int16_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2495 | float_status *s) |
2496 | { | |
98e256fc RH |
2497 | FloatParts64 p; |
2498 | ||
2499 | float32_unpack_canonical(&p, a, s); | |
463b3f0d | 2500 | return parts_float_to_sint(&p, rmode, scale, INT16_MIN, INT16_MAX, s); |
2f6c74be RH |
2501 | } |
2502 | ||
3dede407 | 2503 | int32_t float32_to_int32_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2504 | float_status *s) |
2505 | { | |
98e256fc RH |
2506 | FloatParts64 p; |
2507 | ||
2508 | float32_unpack_canonical(&p, a, s); | |
463b3f0d | 2509 | return parts_float_to_sint(&p, rmode, scale, INT32_MIN, INT32_MAX, s); |
2f6c74be RH |
2510 | } |
2511 | ||
3dede407 | 2512 | int64_t float32_to_int64_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2513 | float_status *s) |
2514 | { | |
98e256fc RH |
2515 | FloatParts64 p; |
2516 | ||
2517 | float32_unpack_canonical(&p, a, s); | |
463b3f0d | 2518 | return parts_float_to_sint(&p, rmode, scale, INT64_MIN, INT64_MAX, s); |
2f6c74be RH |
2519 | } |
2520 | ||
3dede407 | 2521 | int16_t float64_to_int16_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2522 | float_status *s) |
2523 | { | |
98e256fc RH |
2524 | FloatParts64 p; |
2525 | ||
2526 | float64_unpack_canonical(&p, a, s); | |
463b3f0d | 2527 | return parts_float_to_sint(&p, rmode, scale, INT16_MIN, INT16_MAX, s); |
2f6c74be RH |
2528 | } |
2529 | ||
3dede407 | 2530 | int32_t float64_to_int32_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2531 | float_status *s) |
2532 | { | |
98e256fc RH |
2533 | FloatParts64 p; |
2534 | ||
2535 | float64_unpack_canonical(&p, a, s); | |
463b3f0d | 2536 | return parts_float_to_sint(&p, rmode, scale, INT32_MIN, INT32_MAX, s); |
2f6c74be RH |
2537 | } |
2538 | ||
3dede407 | 2539 | int64_t float64_to_int64_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2540 | float_status *s) |
2541 | { | |
98e256fc RH |
2542 | FloatParts64 p; |
2543 | ||
2544 | float64_unpack_canonical(&p, a, s); | |
463b3f0d RH |
2545 | return parts_float_to_sint(&p, rmode, scale, INT64_MIN, INT64_MAX, s); |
2546 | } | |
2547 | ||
2548 | int16_t bfloat16_to_int16_scalbn(bfloat16 a, FloatRoundMode rmode, int scale, | |
2549 | float_status *s) | |
2550 | { | |
2551 | FloatParts64 p; | |
2552 | ||
2553 | bfloat16_unpack_canonical(&p, a, s); | |
2554 | return parts_float_to_sint(&p, rmode, scale, INT16_MIN, INT16_MAX, s); | |
2555 | } | |
2556 | ||
2557 | int32_t bfloat16_to_int32_scalbn(bfloat16 a, FloatRoundMode rmode, int scale, | |
2558 | float_status *s) | |
2559 | { | |
2560 | FloatParts64 p; | |
2561 | ||
2562 | bfloat16_unpack_canonical(&p, a, s); | |
2563 | return parts_float_to_sint(&p, rmode, scale, INT32_MIN, INT32_MAX, s); | |
2564 | } | |
2565 | ||
2566 | int64_t bfloat16_to_int64_scalbn(bfloat16 a, FloatRoundMode rmode, int scale, | |
2567 | float_status *s) | |
2568 | { | |
2569 | FloatParts64 p; | |
2570 | ||
2571 | bfloat16_unpack_canonical(&p, a, s); | |
2572 | return parts_float_to_sint(&p, rmode, scale, INT64_MIN, INT64_MAX, s); | |
2573 | } | |
2574 | ||
2575 | static int32_t float128_to_int32_scalbn(float128 a, FloatRoundMode rmode, | |
2576 | int scale, float_status *s) | |
2577 | { | |
2578 | FloatParts128 p; | |
2579 | ||
2580 | float128_unpack_canonical(&p, a, s); | |
2581 | return parts_float_to_sint(&p, rmode, scale, INT32_MIN, INT32_MAX, s); | |
2582 | } | |
2583 | ||
2584 | static int64_t float128_to_int64_scalbn(float128 a, FloatRoundMode rmode, | |
2585 | int scale, float_status *s) | |
2586 | { | |
2587 | FloatParts128 p; | |
2588 | ||
2589 | float128_unpack_canonical(&p, a, s); | |
2590 | return parts_float_to_sint(&p, rmode, scale, INT64_MIN, INT64_MAX, s); | |
2f6c74be RH |
2591 | } |
2592 | ||
0d93d8ec FC |
2593 | int8_t float16_to_int8(float16 a, float_status *s) |
2594 | { | |
2595 | return float16_to_int8_scalbn(a, s->float_rounding_mode, 0, s); | |
2596 | } | |
2597 | ||
2f6c74be RH |
2598 | int16_t float16_to_int16(float16 a, float_status *s) |
2599 | { | |
2600 | return float16_to_int16_scalbn(a, s->float_rounding_mode, 0, s); | |
2601 | } | |
2602 | ||
2603 | int32_t float16_to_int32(float16 a, float_status *s) | |
2604 | { | |
2605 | return float16_to_int32_scalbn(a, s->float_rounding_mode, 0, s); | |
2606 | } | |
2607 | ||
2608 | int64_t float16_to_int64(float16 a, float_status *s) | |
2609 | { | |
2610 | return float16_to_int64_scalbn(a, s->float_rounding_mode, 0, s); | |
2611 | } | |
2612 | ||
2613 | int16_t float32_to_int16(float32 a, float_status *s) | |
2614 | { | |
2615 | return float32_to_int16_scalbn(a, s->float_rounding_mode, 0, s); | |
2616 | } | |
2617 | ||
2618 | int32_t float32_to_int32(float32 a, float_status *s) | |
2619 | { | |
2620 | return float32_to_int32_scalbn(a, s->float_rounding_mode, 0, s); | |
2621 | } | |
2622 | ||
2623 | int64_t float32_to_int64(float32 a, float_status *s) | |
2624 | { | |
2625 | return float32_to_int64_scalbn(a, s->float_rounding_mode, 0, s); | |
2626 | } | |
2627 | ||
2628 | int16_t float64_to_int16(float64 a, float_status *s) | |
2629 | { | |
2630 | return float64_to_int16_scalbn(a, s->float_rounding_mode, 0, s); | |
2631 | } | |
2632 | ||
2633 | int32_t float64_to_int32(float64 a, float_status *s) | |
2634 | { | |
2635 | return float64_to_int32_scalbn(a, s->float_rounding_mode, 0, s); | |
2636 | } | |
2637 | ||
2638 | int64_t float64_to_int64(float64 a, float_status *s) | |
2639 | { | |
2640 | return float64_to_int64_scalbn(a, s->float_rounding_mode, 0, s); | |
2641 | } | |
2642 | ||
463b3f0d RH |
2643 | int32_t float128_to_int32(float128 a, float_status *s) |
2644 | { | |
2645 | return float128_to_int32_scalbn(a, s->float_rounding_mode, 0, s); | |
2646 | } | |
2647 | ||
2648 | int64_t float128_to_int64(float128 a, float_status *s) | |
2649 | { | |
2650 | return float128_to_int64_scalbn(a, s->float_rounding_mode, 0, s); | |
2651 | } | |
2652 | ||
2f6c74be RH |
2653 | int16_t float16_to_int16_round_to_zero(float16 a, float_status *s) |
2654 | { | |
2655 | return float16_to_int16_scalbn(a, float_round_to_zero, 0, s); | |
2656 | } | |
2657 | ||
2658 | int32_t float16_to_int32_round_to_zero(float16 a, float_status *s) | |
2659 | { | |
2660 | return float16_to_int32_scalbn(a, float_round_to_zero, 0, s); | |
2661 | } | |
2662 | ||
2663 | int64_t float16_to_int64_round_to_zero(float16 a, float_status *s) | |
2664 | { | |
2665 | return float16_to_int64_scalbn(a, float_round_to_zero, 0, s); | |
ab52f973 AB |
2666 | } |
2667 | ||
2f6c74be RH |
2668 | int16_t float32_to_int16_round_to_zero(float32 a, float_status *s) |
2669 | { | |
2670 | return float32_to_int16_scalbn(a, float_round_to_zero, 0, s); | |
2671 | } | |
ab52f973 | 2672 | |
2f6c74be RH |
2673 | int32_t float32_to_int32_round_to_zero(float32 a, float_status *s) |
2674 | { | |
2675 | return float32_to_int32_scalbn(a, float_round_to_zero, 0, s); | |
2676 | } | |
2677 | ||
2678 | int64_t float32_to_int64_round_to_zero(float32 a, float_status *s) | |
2679 | { | |
2680 | return float32_to_int64_scalbn(a, float_round_to_zero, 0, s); | |
2681 | } | |
2682 | ||
2683 | int16_t float64_to_int16_round_to_zero(float64 a, float_status *s) | |
2684 | { | |
2685 | return float64_to_int16_scalbn(a, float_round_to_zero, 0, s); | |
2686 | } | |
ab52f973 | 2687 | |
2f6c74be RH |
2688 | int32_t float64_to_int32_round_to_zero(float64 a, float_status *s) |
2689 | { | |
2690 | return float64_to_int32_scalbn(a, float_round_to_zero, 0, s); | |
2691 | } | |
ab52f973 | 2692 | |
2f6c74be RH |
2693 | int64_t float64_to_int64_round_to_zero(float64 a, float_status *s) |
2694 | { | |
2695 | return float64_to_int64_scalbn(a, float_round_to_zero, 0, s); | |
2696 | } | |
ab52f973 | 2697 | |
463b3f0d | 2698 | int32_t float128_to_int32_round_to_zero(float128 a, float_status *s) |
34f0c0a9 | 2699 | { |
463b3f0d | 2700 | return float128_to_int32_scalbn(a, float_round_to_zero, 0, s); |
34f0c0a9 LZ |
2701 | } |
2702 | ||
463b3f0d | 2703 | int64_t float128_to_int64_round_to_zero(float128 a, float_status *s) |
34f0c0a9 | 2704 | { |
463b3f0d | 2705 | return float128_to_int64_scalbn(a, float_round_to_zero, 0, s); |
34f0c0a9 LZ |
2706 | } |
2707 | ||
2708 | int16_t bfloat16_to_int16(bfloat16 a, float_status *s) | |
2709 | { | |
2710 | return bfloat16_to_int16_scalbn(a, s->float_rounding_mode, 0, s); | |
2711 | } | |
2712 | ||
2713 | int32_t bfloat16_to_int32(bfloat16 a, float_status *s) | |
2714 | { | |
2715 | return bfloat16_to_int32_scalbn(a, s->float_rounding_mode, 0, s); | |
2716 | } | |
2717 | ||
2718 | int64_t bfloat16_to_int64(bfloat16 a, float_status *s) | |
2719 | { | |
2720 | return bfloat16_to_int64_scalbn(a, s->float_rounding_mode, 0, s); | |
2721 | } | |
2722 | ||
2723 | int16_t bfloat16_to_int16_round_to_zero(bfloat16 a, float_status *s) | |
2724 | { | |
2725 | return bfloat16_to_int16_scalbn(a, float_round_to_zero, 0, s); | |
2726 | } | |
2727 | ||
2728 | int32_t bfloat16_to_int32_round_to_zero(bfloat16 a, float_status *s) | |
2729 | { | |
2730 | return bfloat16_to_int32_scalbn(a, float_round_to_zero, 0, s); | |
2731 | } | |
2732 | ||
2733 | int64_t bfloat16_to_int64_round_to_zero(bfloat16 a, float_status *s) | |
2734 | { | |
2735 | return bfloat16_to_int64_scalbn(a, float_round_to_zero, 0, s); | |
2736 | } | |
2737 | ||
ab52f973 | 2738 | /* |
4ab4aef0 | 2739 | * Floating-point to unsigned integer conversions |
ab52f973 AB |
2740 | */ |
2741 | ||
0d93d8ec FC |
2742 | uint8_t float16_to_uint8_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2743 | float_status *s) | |
2744 | { | |
98e256fc RH |
2745 | FloatParts64 p; |
2746 | ||
2747 | float16_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2748 | return parts_float_to_uint(&p, rmode, scale, UINT8_MAX, s); |
0d93d8ec FC |
2749 | } |
2750 | ||
3dede407 | 2751 | uint16_t float16_to_uint16_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2752 | float_status *s) |
2753 | { | |
98e256fc RH |
2754 | FloatParts64 p; |
2755 | ||
2756 | float16_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2757 | return parts_float_to_uint(&p, rmode, scale, UINT16_MAX, s); |
2f6c74be RH |
2758 | } |
2759 | ||
3dede407 | 2760 | uint32_t float16_to_uint32_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2761 | float_status *s) |
2762 | { | |
98e256fc RH |
2763 | FloatParts64 p; |
2764 | ||
2765 | float16_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2766 | return parts_float_to_uint(&p, rmode, scale, UINT32_MAX, s); |
2f6c74be RH |
2767 | } |
2768 | ||
3dede407 | 2769 | uint64_t float16_to_uint64_scalbn(float16 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2770 | float_status *s) |
2771 | { | |
98e256fc RH |
2772 | FloatParts64 p; |
2773 | ||
2774 | float16_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2775 | return parts_float_to_uint(&p, rmode, scale, UINT64_MAX, s); |
2f6c74be RH |
2776 | } |
2777 | ||
3dede407 | 2778 | uint16_t float32_to_uint16_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2779 | float_status *s) |
2780 | { | |
98e256fc RH |
2781 | FloatParts64 p; |
2782 | ||
2783 | float32_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2784 | return parts_float_to_uint(&p, rmode, scale, UINT16_MAX, s); |
2f6c74be RH |
2785 | } |
2786 | ||
3dede407 | 2787 | uint32_t float32_to_uint32_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2788 | float_status *s) |
2789 | { | |
98e256fc RH |
2790 | FloatParts64 p; |
2791 | ||
2792 | float32_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2793 | return parts_float_to_uint(&p, rmode, scale, UINT32_MAX, s); |
2f6c74be RH |
2794 | } |
2795 | ||
3dede407 | 2796 | uint64_t float32_to_uint64_scalbn(float32 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2797 | float_status *s) |
2798 | { | |
98e256fc RH |
2799 | FloatParts64 p; |
2800 | ||
2801 | float32_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2802 | return parts_float_to_uint(&p, rmode, scale, UINT64_MAX, s); |
2f6c74be RH |
2803 | } |
2804 | ||
3dede407 | 2805 | uint16_t float64_to_uint16_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2806 | float_status *s) |
2807 | { | |
98e256fc RH |
2808 | FloatParts64 p; |
2809 | ||
2810 | float64_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2811 | return parts_float_to_uint(&p, rmode, scale, UINT16_MAX, s); |
2f6c74be RH |
2812 | } |
2813 | ||
3dede407 | 2814 | uint32_t float64_to_uint32_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2815 | float_status *s) |
2816 | { | |
98e256fc RH |
2817 | FloatParts64 p; |
2818 | ||
2819 | float64_unpack_canonical(&p, a, s); | |
4ab4aef0 | 2820 | return parts_float_to_uint(&p, rmode, scale, UINT32_MAX, s); |
2f6c74be RH |
2821 | } |
2822 | ||
3dede407 | 2823 | uint64_t float64_to_uint64_scalbn(float64 a, FloatRoundMode rmode, int scale, |
2f6c74be RH |
2824 | float_status *s) |
2825 | { | |
98e256fc RH |
2826 | FloatParts64 p; |
2827 | ||
2828 | float64_unpack_canonical(&p, a, s); | |
4ab4aef0 RH |
2829 | return parts_float_to_uint(&p, rmode, scale, UINT64_MAX, s); |
2830 | } | |
2831 | ||
2832 | uint16_t bfloat16_to_uint16_scalbn(bfloat16 a, FloatRoundMode rmode, | |
2833 | int scale, float_status *s) | |
2834 | { | |
2835 | FloatParts64 p; | |
2836 | ||
2837 | bfloat16_unpack_canonical(&p, a, s); | |
2838 | return parts_float_to_uint(&p, rmode, scale, UINT16_MAX, s); | |
2839 | } | |
2840 | ||
2841 | uint32_t bfloat16_to_uint32_scalbn(bfloat16 a, FloatRoundMode rmode, | |
2842 | int scale, float_status *s) | |
2843 | { | |
2844 | FloatParts64 p; | |
2845 | ||
2846 | bfloat16_unpack_canonical(&p, a, s); | |
2847 | return parts_float_to_uint(&p, rmode, scale, UINT32_MAX, s); | |
2848 | } | |
2849 | ||
2850 | uint64_t bfloat16_to_uint64_scalbn(bfloat16 a, FloatRoundMode rmode, | |
2851 | int scale, float_status *s) | |
2852 | { | |
2853 | FloatParts64 p; | |
2854 | ||
2855 | bfloat16_unpack_canonical(&p, a, s); | |
2856 | return parts_float_to_uint(&p, rmode, scale, UINT64_MAX, s); | |
2857 | } | |
2858 | ||
2859 | static uint32_t float128_to_uint32_scalbn(float128 a, FloatRoundMode rmode, | |
2860 | int scale, float_status *s) | |
2861 | { | |
2862 | FloatParts128 p; | |
2863 | ||
2864 | float128_unpack_canonical(&p, a, s); | |
2865 | return parts_float_to_uint(&p, rmode, scale, UINT32_MAX, s); | |
2866 | } | |
2867 | ||
2868 | static uint64_t float128_to_uint64_scalbn(float128 a, FloatRoundMode rmode, | |
2869 | int scale, float_status *s) | |
2870 | { | |
2871 | FloatParts128 p; | |
2872 | ||
2873 | float128_unpack_canonical(&p, a, s); | |
2874 | return parts_float_to_uint(&p, rmode, scale, UINT64_MAX, s); | |
2f6c74be RH |
2875 | } |
2876 | ||
0d93d8ec FC |
2877 | uint8_t float16_to_uint8(float16 a, float_status *s) |
2878 | { | |
2879 | return float16_to_uint8_scalbn(a, s->float_rounding_mode, 0, s); | |
2880 | } | |
2881 | ||
2f6c74be RH |
2882 | uint16_t float16_to_uint16(float16 a, float_status *s) |
2883 | { | |
2884 | return float16_to_uint16_scalbn(a, s->float_rounding_mode, 0, s); | |
2885 | } | |
2886 | ||
2887 | uint32_t float16_to_uint32(float16 a, float_status *s) | |
2888 | { | |
2889 | return float16_to_uint32_scalbn(a, s->float_rounding_mode, 0, s); | |
2890 | } | |
2891 | ||
2892 | uint64_t float16_to_uint64(float16 a, float_status *s) | |
2893 | { | |
2894 | return float16_to_uint64_scalbn(a, s->float_rounding_mode, 0, s); | |
2895 | } | |
2896 | ||
2897 | uint16_t float32_to_uint16(float32 a, float_status *s) | |
2898 | { | |
2899 | return float32_to_uint16_scalbn(a, s->float_rounding_mode, 0, s); | |
2900 | } | |
2901 | ||
2902 | uint32_t float32_to_uint32(float32 a, float_status *s) | |
2903 | { | |
2904 | return float32_to_uint32_scalbn(a, s->float_rounding_mode, 0, s); | |
2905 | } | |
2906 | ||
2907 | uint64_t float32_to_uint64(float32 a, float_status *s) | |
2908 | { | |
2909 | return float32_to_uint64_scalbn(a, s->float_rounding_mode, 0, s); | |
2910 | } | |
2911 | ||
2912 | uint16_t float64_to_uint16(float64 a, float_status *s) | |
2913 | { | |
2914 | return float64_to_uint16_scalbn(a, s->float_rounding_mode, 0, s); | |
2915 | } | |
2916 | ||
2917 | uint32_t float64_to_uint32(float64 a, float_status *s) | |
2918 | { | |
2919 | return float64_to_uint32_scalbn(a, s->float_rounding_mode, 0, s); | |
2920 | } | |
2921 | ||
2922 | uint64_t float64_to_uint64(float64 a, float_status *s) | |
2923 | { | |
2924 | return float64_to_uint64_scalbn(a, s->float_rounding_mode, 0, s); | |
2925 | } | |
2926 | ||
4ab4aef0 RH |
2927 | uint32_t float128_to_uint32(float128 a, float_status *s) |
2928 | { | |
2929 | return float128_to_uint32_scalbn(a, s->float_rounding_mode, 0, s); | |
2930 | } | |
2931 | ||
2932 | uint64_t float128_to_uint64(float128 a, float_status *s) | |
2933 | { | |
2934 | return float128_to_uint64_scalbn(a, s->float_rounding_mode, 0, s); | |
2935 | } | |
2936 | ||
2f6c74be RH |
2937 | uint16_t float16_to_uint16_round_to_zero(float16 a, float_status *s) |
2938 | { | |
2939 | return float16_to_uint16_scalbn(a, float_round_to_zero, 0, s); | |
2940 | } | |
2941 | ||
2942 | uint32_t float16_to_uint32_round_to_zero(float16 a, float_status *s) | |
2943 | { | |
2944 | return float16_to_uint32_scalbn(a, float_round_to_zero, 0, s); | |
2945 | } | |
2946 | ||
2947 | uint64_t float16_to_uint64_round_to_zero(float16 a, float_status *s) | |
2948 | { | |
2949 | return float16_to_uint64_scalbn(a, float_round_to_zero, 0, s); | |
2950 | } | |
2951 | ||
2952 | uint16_t float32_to_uint16_round_to_zero(float32 a, float_status *s) | |
2953 | { | |
2954 | return float32_to_uint16_scalbn(a, float_round_to_zero, 0, s); | |
2955 | } | |
2956 | ||
2957 | uint32_t float32_to_uint32_round_to_zero(float32 a, float_status *s) | |
2958 | { | |
2959 | return float32_to_uint32_scalbn(a, float_round_to_zero, 0, s); | |
2960 | } | |
2961 | ||
2962 | uint64_t float32_to_uint64_round_to_zero(float32 a, float_status *s) | |
2963 | { | |
2964 | return float32_to_uint64_scalbn(a, float_round_to_zero, 0, s); | |
2965 | } | |
2966 | ||
2967 | uint16_t float64_to_uint16_round_to_zero(float64 a, float_status *s) | |
2968 | { | |
2969 | return float64_to_uint16_scalbn(a, float_round_to_zero, 0, s); | |
2970 | } | |
2971 | ||
2972 | uint32_t float64_to_uint32_round_to_zero(float64 a, float_status *s) | |
2973 | { | |
2974 | return float64_to_uint32_scalbn(a, float_round_to_zero, 0, s); | |
2975 | } | |
2976 | ||
2977 | uint64_t float64_to_uint64_round_to_zero(float64 a, float_status *s) | |
2978 | { | |
2979 | return float64_to_uint64_scalbn(a, float_round_to_zero, 0, s); | |
2980 | } | |
ab52f973 | 2981 | |
4ab4aef0 | 2982 | uint32_t float128_to_uint32_round_to_zero(float128 a, float_status *s) |
34f0c0a9 | 2983 | { |
4ab4aef0 | 2984 | return float128_to_uint32_scalbn(a, float_round_to_zero, 0, s); |
34f0c0a9 LZ |
2985 | } |
2986 | ||
4ab4aef0 | 2987 | uint64_t float128_to_uint64_round_to_zero(float128 a, float_status *s) |
34f0c0a9 | 2988 | { |
4ab4aef0 | 2989 | return float128_to_uint64_scalbn(a, float_round_to_zero, 0, s); |
34f0c0a9 LZ |
2990 | } |
2991 | ||
2992 | uint16_t bfloat16_to_uint16(bfloat16 a, float_status *s) | |
2993 | { | |
2994 | return bfloat16_to_uint16_scalbn(a, s->float_rounding_mode, 0, s); | |
2995 | } | |
2996 | ||
2997 | uint32_t bfloat16_to_uint32(bfloat16 a, float_status *s) | |
2998 | { | |
2999 | return bfloat16_to_uint32_scalbn(a, s->float_rounding_mode, 0, s); | |
3000 | } | |
3001 | ||
3002 | uint64_t bfloat16_to_uint64(bfloat16 a, float_status *s) | |
3003 | { | |
3004 | return bfloat16_to_uint64_scalbn(a, s->float_rounding_mode, 0, s); | |
3005 | } | |
3006 | ||
3007 | uint16_t bfloat16_to_uint16_round_to_zero(bfloat16 a, float_status *s) | |
3008 | { | |
3009 | return bfloat16_to_uint16_scalbn(a, float_round_to_zero, 0, s); | |
3010 | } | |
3011 | ||
3012 | uint32_t bfloat16_to_uint32_round_to_zero(bfloat16 a, float_status *s) | |
3013 | { | |
3014 | return bfloat16_to_uint32_scalbn(a, float_round_to_zero, 0, s); | |
3015 | } | |
3016 | ||
3017 | uint64_t bfloat16_to_uint64_round_to_zero(bfloat16 a, float_status *s) | |
3018 | { | |
3019 | return bfloat16_to_uint64_scalbn(a, float_round_to_zero, 0, s); | |
3020 | } | |
3021 | ||
c02e1fb8 | 3022 | /* |
e3689519 | 3023 | * Signed integer to floating-point conversions |
c02e1fb8 AB |
3024 | */ |
3025 | ||
2abdfe24 | 3026 | float16 int64_to_float16_scalbn(int64_t a, int scale, float_status *status) |
c02e1fb8 | 3027 | { |
e3689519 RH |
3028 | FloatParts64 p; |
3029 | ||
3030 | parts_sint_to_float(&p, a, scale, status); | |
3031 | return float16_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3032 | } |
3033 | ||
2abdfe24 RH |
3034 | float16 int32_to_float16_scalbn(int32_t a, int scale, float_status *status) |
3035 | { | |
3036 | return int64_to_float16_scalbn(a, scale, status); | |
3037 | } | |
3038 | ||
3039 | float16 int16_to_float16_scalbn(int16_t a, int scale, float_status *status) | |
3040 | { | |
3041 | return int64_to_float16_scalbn(a, scale, status); | |
3042 | } | |
3043 | ||
3044 | float16 int64_to_float16(int64_t a, float_status *status) | |
3045 | { | |
3046 | return int64_to_float16_scalbn(a, 0, status); | |
3047 | } | |
3048 | ||
c02e1fb8 AB |
3049 | float16 int32_to_float16(int32_t a, float_status *status) |
3050 | { | |
2abdfe24 | 3051 | return int64_to_float16_scalbn(a, 0, status); |
c02e1fb8 AB |
3052 | } |
3053 | ||
3054 | float16 int16_to_float16(int16_t a, float_status *status) | |
3055 | { | |
2abdfe24 | 3056 | return int64_to_float16_scalbn(a, 0, status); |
c02e1fb8 AB |
3057 | } |
3058 | ||
0d93d8ec FC |
3059 | float16 int8_to_float16(int8_t a, float_status *status) |
3060 | { | |
3061 | return int64_to_float16_scalbn(a, 0, status); | |
3062 | } | |
3063 | ||
2abdfe24 | 3064 | float32 int64_to_float32_scalbn(int64_t a, int scale, float_status *status) |
c02e1fb8 | 3065 | { |
e3689519 RH |
3066 | FloatParts64 p; |
3067 | ||
3068 | parts64_sint_to_float(&p, a, scale, status); | |
3069 | return float32_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3070 | } |
3071 | ||
2abdfe24 RH |
3072 | float32 int32_to_float32_scalbn(int32_t a, int scale, float_status *status) |
3073 | { | |
3074 | return int64_to_float32_scalbn(a, scale, status); | |
3075 | } | |
3076 | ||
3077 | float32 int16_to_float32_scalbn(int16_t a, int scale, float_status *status) | |
3078 | { | |
3079 | return int64_to_float32_scalbn(a, scale, status); | |
3080 | } | |
3081 | ||
3082 | float32 int64_to_float32(int64_t a, float_status *status) | |
3083 | { | |
3084 | return int64_to_float32_scalbn(a, 0, status); | |
3085 | } | |
3086 | ||
c02e1fb8 AB |
3087 | float32 int32_to_float32(int32_t a, float_status *status) |
3088 | { | |
2abdfe24 | 3089 | return int64_to_float32_scalbn(a, 0, status); |
c02e1fb8 AB |
3090 | } |
3091 | ||
3092 | float32 int16_to_float32(int16_t a, float_status *status) | |
3093 | { | |
2abdfe24 | 3094 | return int64_to_float32_scalbn(a, 0, status); |
c02e1fb8 AB |
3095 | } |
3096 | ||
2abdfe24 | 3097 | float64 int64_to_float64_scalbn(int64_t a, int scale, float_status *status) |
c02e1fb8 | 3098 | { |
e3689519 RH |
3099 | FloatParts64 p; |
3100 | ||
3101 | parts_sint_to_float(&p, a, scale, status); | |
3102 | return float64_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3103 | } |
3104 | ||
2abdfe24 RH |
3105 | float64 int32_to_float64_scalbn(int32_t a, int scale, float_status *status) |
3106 | { | |
3107 | return int64_to_float64_scalbn(a, scale, status); | |
3108 | } | |
3109 | ||
3110 | float64 int16_to_float64_scalbn(int16_t a, int scale, float_status *status) | |
3111 | { | |
3112 | return int64_to_float64_scalbn(a, scale, status); | |
3113 | } | |
3114 | ||
3115 | float64 int64_to_float64(int64_t a, float_status *status) | |
3116 | { | |
3117 | return int64_to_float64_scalbn(a, 0, status); | |
3118 | } | |
3119 | ||
c02e1fb8 AB |
3120 | float64 int32_to_float64(int32_t a, float_status *status) |
3121 | { | |
2abdfe24 | 3122 | return int64_to_float64_scalbn(a, 0, status); |
c02e1fb8 AB |
3123 | } |
3124 | ||
3125 | float64 int16_to_float64(int16_t a, float_status *status) | |
3126 | { | |
2abdfe24 | 3127 | return int64_to_float64_scalbn(a, 0, status); |
c02e1fb8 AB |
3128 | } |
3129 | ||
34f0c0a9 LZ |
3130 | bfloat16 int64_to_bfloat16_scalbn(int64_t a, int scale, float_status *status) |
3131 | { | |
e3689519 RH |
3132 | FloatParts64 p; |
3133 | ||
3134 | parts_sint_to_float(&p, a, scale, status); | |
3135 | return bfloat16_round_pack_canonical(&p, status); | |
34f0c0a9 LZ |
3136 | } |
3137 | ||
3138 | bfloat16 int32_to_bfloat16_scalbn(int32_t a, int scale, float_status *status) | |
3139 | { | |
3140 | return int64_to_bfloat16_scalbn(a, scale, status); | |
3141 | } | |
3142 | ||
3143 | bfloat16 int16_to_bfloat16_scalbn(int16_t a, int scale, float_status *status) | |
3144 | { | |
3145 | return int64_to_bfloat16_scalbn(a, scale, status); | |
3146 | } | |
3147 | ||
3148 | bfloat16 int64_to_bfloat16(int64_t a, float_status *status) | |
3149 | { | |
3150 | return int64_to_bfloat16_scalbn(a, 0, status); | |
3151 | } | |
3152 | ||
3153 | bfloat16 int32_to_bfloat16(int32_t a, float_status *status) | |
3154 | { | |
3155 | return int64_to_bfloat16_scalbn(a, 0, status); | |
3156 | } | |
3157 | ||
3158 | bfloat16 int16_to_bfloat16(int16_t a, float_status *status) | |
3159 | { | |
3160 | return int64_to_bfloat16_scalbn(a, 0, status); | |
3161 | } | |
c02e1fb8 | 3162 | |
e3689519 RH |
3163 | float128 int64_to_float128(int64_t a, float_status *status) |
3164 | { | |
3165 | FloatParts128 p; | |
3166 | ||
3167 | parts_sint_to_float(&p, a, 0, status); | |
3168 | return float128_round_pack_canonical(&p, status); | |
3169 | } | |
3170 | ||
3171 | float128 int32_to_float128(int32_t a, float_status *status) | |
3172 | { | |
3173 | return int64_to_float128(a, status); | |
3174 | } | |
3175 | ||
c02e1fb8 | 3176 | /* |
37c954a1 | 3177 | * Unsigned Integer to floating-point conversions |
c02e1fb8 AB |
3178 | */ |
3179 | ||
2abdfe24 | 3180 | float16 uint64_to_float16_scalbn(uint64_t a, int scale, float_status *status) |
c02e1fb8 | 3181 | { |
37c954a1 RH |
3182 | FloatParts64 p; |
3183 | ||
3184 | parts_uint_to_float(&p, a, scale, status); | |
3185 | return float16_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3186 | } |
3187 | ||
2abdfe24 RH |
3188 | float16 uint32_to_float16_scalbn(uint32_t a, int scale, float_status *status) |
3189 | { | |
3190 | return uint64_to_float16_scalbn(a, scale, status); | |
3191 | } | |
3192 | ||
3193 | float16 uint16_to_float16_scalbn(uint16_t a, int scale, float_status *status) | |
3194 | { | |
3195 | return uint64_to_float16_scalbn(a, scale, status); | |
3196 | } | |
3197 | ||
3198 | float16 uint64_to_float16(uint64_t a, float_status *status) | |
3199 | { | |
3200 | return uint64_to_float16_scalbn(a, 0, status); | |
3201 | } | |
3202 | ||
c02e1fb8 AB |
3203 | float16 uint32_to_float16(uint32_t a, float_status *status) |
3204 | { | |
2abdfe24 | 3205 | return uint64_to_float16_scalbn(a, 0, status); |
c02e1fb8 AB |
3206 | } |
3207 | ||
3208 | float16 uint16_to_float16(uint16_t a, float_status *status) | |
3209 | { | |
2abdfe24 | 3210 | return uint64_to_float16_scalbn(a, 0, status); |
c02e1fb8 AB |
3211 | } |
3212 | ||
0d93d8ec FC |
3213 | float16 uint8_to_float16(uint8_t a, float_status *status) |
3214 | { | |
3215 | return uint64_to_float16_scalbn(a, 0, status); | |
3216 | } | |
3217 | ||
2abdfe24 | 3218 | float32 uint64_to_float32_scalbn(uint64_t a, int scale, float_status *status) |
c02e1fb8 | 3219 | { |
37c954a1 RH |
3220 | FloatParts64 p; |
3221 | ||
3222 | parts_uint_to_float(&p, a, scale, status); | |
3223 | return float32_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3224 | } |
3225 | ||
2abdfe24 RH |
3226 | float32 uint32_to_float32_scalbn(uint32_t a, int scale, float_status *status) |
3227 | { | |
3228 | return uint64_to_float32_scalbn(a, scale, status); | |
3229 | } | |
3230 | ||
3231 | float32 uint16_to_float32_scalbn(uint16_t a, int scale, float_status *status) | |
3232 | { | |
3233 | return uint64_to_float32_scalbn(a, scale, status); | |
3234 | } | |
3235 | ||
3236 | float32 uint64_to_float32(uint64_t a, float_status *status) | |
3237 | { | |
3238 | return uint64_to_float32_scalbn(a, 0, status); | |
3239 | } | |
3240 | ||
c02e1fb8 AB |
3241 | float32 uint32_to_float32(uint32_t a, float_status *status) |
3242 | { | |
2abdfe24 | 3243 | return uint64_to_float32_scalbn(a, 0, status); |
c02e1fb8 AB |
3244 | } |
3245 | ||
3246 | float32 uint16_to_float32(uint16_t a, float_status *status) | |
3247 | { | |
2abdfe24 | 3248 | return uint64_to_float32_scalbn(a, 0, status); |
c02e1fb8 AB |
3249 | } |
3250 | ||
2abdfe24 | 3251 | float64 uint64_to_float64_scalbn(uint64_t a, int scale, float_status *status) |
c02e1fb8 | 3252 | { |
37c954a1 RH |
3253 | FloatParts64 p; |
3254 | ||
3255 | parts_uint_to_float(&p, a, scale, status); | |
3256 | return float64_round_pack_canonical(&p, status); | |
c02e1fb8 AB |
3257 | } |
3258 | ||
2abdfe24 RH |
3259 | float64 uint32_to_float64_scalbn(uint32_t a, int scale, float_status *status) |
3260 | { | |
3261 | return uint64_to_float64_scalbn(a, scale, status); | |
3262 | } | |
3263 | ||
3264 | float64 uint16_to_float64_scalbn(uint16_t a, int scale, float_status *status) | |
3265 | { | |
3266 | return uint64_to_float64_scalbn(a, scale, status); | |
3267 | } | |
3268 | ||
3269 | float64 uint64_to_float64(uint64_t a, float_status *status) | |
3270 | { | |
3271 | return uint64_to_float64_scalbn(a, 0, status); | |
3272 | } | |
3273 | ||
c02e1fb8 AB |
3274 | float64 uint32_to_float64(uint32_t a, float_status *status) |
3275 | { | |
2abdfe24 | 3276 | return uint64_to_float64_scalbn(a, 0, status); |
c02e1fb8 AB |
3277 | } |
3278 | ||
3279 | float64 uint16_to_float64(uint16_t a, float_status *status) | |
3280 | { | |
2abdfe24 | 3281 | return uint64_to_float64_scalbn(a, 0, status); |
c02e1fb8 AB |
3282 | } |
3283 | ||
34f0c0a9 LZ |
3284 | bfloat16 uint64_to_bfloat16_scalbn(uint64_t a, int scale, float_status *status) |
3285 | { | |
37c954a1 RH |
3286 | FloatParts64 p; |
3287 | ||
3288 | parts_uint_to_float(&p, a, scale, status); | |
3289 | return bfloat16_round_pack_canonical(&p, status); | |
34f0c0a9 LZ |
3290 | } |
3291 | ||
3292 | bfloat16 uint32_to_bfloat16_scalbn(uint32_t a, int scale, float_status *status) | |
3293 | { | |
3294 | return uint64_to_bfloat16_scalbn(a, scale, status); | |
3295 | } | |
3296 | ||
3297 | bfloat16 uint16_to_bfloat16_scalbn(uint16_t a, int scale, float_status *status) | |
3298 | { | |
3299 | return uint64_to_bfloat16_scalbn(a, scale, status); | |
3300 | } | |
3301 | ||
3302 | bfloat16 uint64_to_bfloat16(uint64_t a, float_status *status) | |
3303 | { | |
3304 | return uint64_to_bfloat16_scalbn(a, 0, status); | |
3305 | } | |
3306 | ||
3307 | bfloat16 uint32_to_bfloat16(uint32_t a, float_status *status) | |
3308 | { | |
3309 | return uint64_to_bfloat16_scalbn(a, 0, status); | |
3310 | } | |
3311 | ||
3312 | bfloat16 uint16_to_bfloat16(uint16_t a, float_status *status) | |
3313 | { | |
3314 | return uint64_to_bfloat16_scalbn(a, 0, status); | |
3315 | } | |
3316 | ||
37c954a1 RH |
3317 | float128 uint64_to_float128(uint64_t a, float_status *status) |
3318 | { | |
3319 | FloatParts128 p; | |
3320 | ||
3321 | parts_uint_to_float(&p, a, 0, status); | |
3322 | return float128_round_pack_canonical(&p, status); | |
3323 | } | |
3324 | ||
e1c4667a RH |
3325 | /* |
3326 | * Minimum and maximum | |
89360067 | 3327 | */ |
89360067 | 3328 | |
e1c4667a RH |
3329 | static float16 float16_minmax(float16 a, float16 b, float_status *s, int flags) |
3330 | { | |
3331 | FloatParts64 pa, pb, *pr; | |
89360067 | 3332 | |
e1c4667a RH |
3333 | float16_unpack_canonical(&pa, a, s); |
3334 | float16_unpack_canonical(&pb, b, s); | |
3335 | pr = parts_minmax(&pa, &pb, s, flags); | |
3336 | ||
3337 | return float16_round_pack_canonical(pr, s); | |
89360067 AB |
3338 | } |
3339 | ||
e1c4667a RH |
3340 | static bfloat16 bfloat16_minmax(bfloat16 a, bfloat16 b, |
3341 | float_status *s, int flags) | |
3342 | { | |
3343 | FloatParts64 pa, pb, *pr; | |
3344 | ||
3345 | bfloat16_unpack_canonical(&pa, a, s); | |
3346 | bfloat16_unpack_canonical(&pb, b, s); | |
3347 | pr = parts_minmax(&pa, &pb, s, flags); | |
3348 | ||
3349 | return bfloat16_round_pack_canonical(pr, s); | |
3350 | } | |
3351 | ||
3352 | static float32 float32_minmax(float32 a, float32 b, float_status *s, int flags) | |
3353 | { | |
3354 | FloatParts64 pa, pb, *pr; | |
3355 | ||
3356 | float32_unpack_canonical(&pa, a, s); | |
3357 | float32_unpack_canonical(&pb, b, s); | |
3358 | pr = parts_minmax(&pa, &pb, s, flags); | |
3359 | ||
3360 | return float32_round_pack_canonical(pr, s); | |
3361 | } | |
3362 | ||
3363 | static float64 float64_minmax(float64 a, float64 b, float_status *s, int flags) | |
3364 | { | |
3365 | FloatParts64 pa, pb, *pr; | |
3366 | ||
3367 | float64_unpack_canonical(&pa, a, s); | |
3368 | float64_unpack_canonical(&pb, b, s); | |
3369 | pr = parts_minmax(&pa, &pb, s, flags); | |
3370 | ||
3371 | return float64_round_pack_canonical(pr, s); | |
3372 | } | |
3373 | ||
ceebc129 DH |
3374 | static float128 float128_minmax(float128 a, float128 b, |
3375 | float_status *s, int flags) | |
3376 | { | |
3377 | FloatParts128 pa, pb, *pr; | |
3378 | ||
3379 | float128_unpack_canonical(&pa, a, s); | |
3380 | float128_unpack_canonical(&pb, b, s); | |
3381 | pr = parts_minmax(&pa, &pb, s, flags); | |
3382 | ||
3383 | return float128_round_pack_canonical(pr, s); | |
3384 | } | |
3385 | ||
e1c4667a RH |
3386 | #define MINMAX_1(type, name, flags) \ |
3387 | type type##_##name(type a, type b, float_status *s) \ | |
3388 | { return type##_minmax(a, b, s, flags); } | |
3389 | ||
3390 | #define MINMAX_2(type) \ | |
3391 | MINMAX_1(type, max, 0) \ | |
3392 | MINMAX_1(type, maxnum, minmax_isnum) \ | |
3393 | MINMAX_1(type, maxnummag, minmax_isnum | minmax_ismag) \ | |
3394 | MINMAX_1(type, min, minmax_ismin) \ | |
3395 | MINMAX_1(type, minnum, minmax_ismin | minmax_isnum) \ | |
3396 | MINMAX_1(type, minnummag, minmax_ismin | minmax_isnum | minmax_ismag) | |
3397 | ||
3398 | MINMAX_2(float16) | |
3399 | MINMAX_2(bfloat16) | |
3400 | MINMAX_2(float32) | |
3401 | MINMAX_2(float64) | |
ceebc129 | 3402 | MINMAX_2(float128) |
e1c4667a RH |
3403 | |
3404 | #undef MINMAX_1 | |
3405 | #undef MINMAX_2 | |
8282310d | 3406 | |
6eb169b8 RH |
3407 | /* |
3408 | * Floating point compare | |
3409 | */ | |
0c4c9092 | 3410 | |
6eb169b8 RH |
3411 | static FloatRelation QEMU_FLATTEN |
3412 | float16_do_compare(float16 a, float16 b, float_status *s, bool is_quiet) | |
3413 | { | |
3414 | FloatParts64 pa, pb; | |
0c4c9092 | 3415 | |
6eb169b8 RH |
3416 | float16_unpack_canonical(&pa, a, s); |
3417 | float16_unpack_canonical(&pb, b, s); | |
3418 | return parts_compare(&pa, &pb, s, is_quiet); | |
0c4c9092 AB |
3419 | } |
3420 | ||
71bfd65c | 3421 | FloatRelation float16_compare(float16 a, float16 b, float_status *s) |
d9fe9db9 | 3422 | { |
6eb169b8 | 3423 | return float16_do_compare(a, b, s, false); |
d9fe9db9 EC |
3424 | } |
3425 | ||
71bfd65c | 3426 | FloatRelation float16_compare_quiet(float16 a, float16 b, float_status *s) |
d9fe9db9 | 3427 | { |
6eb169b8 RH |
3428 | return float16_do_compare(a, b, s, true); |
3429 | } | |
3430 | ||
3431 | static FloatRelation QEMU_SOFTFLOAT_ATTR | |
3432 | float32_do_compare(float32 a, float32 b, float_status *s, bool is_quiet) | |
3433 | { | |
3434 | FloatParts64 pa, pb; | |
3435 | ||
3436 | float32_unpack_canonical(&pa, a, s); | |
3437 | float32_unpack_canonical(&pb, b, s); | |
3438 | return parts_compare(&pa, &pb, s, is_quiet); | |
d9fe9db9 EC |
3439 | } |
3440 | ||
71bfd65c | 3441 | static FloatRelation QEMU_FLATTEN |
6eb169b8 | 3442 | float32_hs_compare(float32 xa, float32 xb, float_status *s, bool is_quiet) |
d9fe9db9 EC |
3443 | { |
3444 | union_float32 ua, ub; | |
3445 | ||
3446 | ua.s = xa; | |
3447 | ub.s = xb; | |
3448 | ||
3449 | if (QEMU_NO_HARDFLOAT) { | |
3450 | goto soft; | |
3451 | } | |
3452 | ||
3453 | float32_input_flush2(&ua.s, &ub.s, s); | |
3454 | if (isgreaterequal(ua.h, ub.h)) { | |
3455 | if (isgreater(ua.h, ub.h)) { | |
3456 | return float_relation_greater; | |
3457 | } | |
3458 | return float_relation_equal; | |
3459 | } | |
3460 | if (likely(isless(ua.h, ub.h))) { | |
3461 | return float_relation_less; | |
3462 | } | |
6eb169b8 RH |
3463 | /* |
3464 | * The only condition remaining is unordered. | |
d9fe9db9 EC |
3465 | * Fall through to set flags. |
3466 | */ | |
3467 | soft: | |
6eb169b8 | 3468 | return float32_do_compare(ua.s, ub.s, s, is_quiet); |
d9fe9db9 EC |
3469 | } |
3470 | ||
71bfd65c | 3471 | FloatRelation float32_compare(float32 a, float32 b, float_status *s) |
d9fe9db9 | 3472 | { |
6eb169b8 | 3473 | return float32_hs_compare(a, b, s, false); |
d9fe9db9 EC |
3474 | } |
3475 | ||
71bfd65c | 3476 | FloatRelation float32_compare_quiet(float32 a, float32 b, float_status *s) |
d9fe9db9 | 3477 | { |
6eb169b8 RH |
3478 | return float32_hs_compare(a, b, s, true); |
3479 | } | |
3480 | ||
3481 | static FloatRelation QEMU_SOFTFLOAT_ATTR | |
3482 | float64_do_compare(float64 a, float64 b, float_status *s, bool is_quiet) | |
3483 | { | |
3484 | FloatParts64 pa, pb; | |
3485 | ||
3486 | float64_unpack_canonical(&pa, a, s); | |
3487 | float64_unpack_canonical(&pb, b, s); | |
3488 | return parts_compare(&pa, &pb, s, is_quiet); | |
d9fe9db9 EC |
3489 | } |
3490 | ||
71bfd65c | 3491 | static FloatRelation QEMU_FLATTEN |
6eb169b8 | 3492 | float64_hs_compare(float64 xa, float64 xb, float_status *s, bool is_quiet) |
d9fe9db9 EC |
3493 | { |
3494 | union_float64 ua, ub; | |
3495 | ||
3496 | ua.s = xa; | |
3497 | ub.s = xb; | |
3498 | ||
3499 | if (QEMU_NO_HARDFLOAT) { | |
3500 | goto soft; | |
3501 | } | |
3502 | ||
3503 | float64_input_flush2(&ua.s, &ub.s, s); | |
3504 | if (isgreaterequal(ua.h, ub.h)) { | |
3505 | if (isgreater(ua.h, ub.h)) { | |
3506 | return float_relation_greater; | |
3507 | } | |
3508 | return float_relation_equal; | |
3509 | } | |
3510 | if (likely(isless(ua.h, ub.h))) { | |
3511 | return float_relation_less; | |
3512 | } | |
6eb169b8 RH |
3513 | /* |
3514 | * The only condition remaining is unordered. | |
d9fe9db9 EC |
3515 | * Fall through to set flags. |
3516 | */ | |
3517 | soft: | |
6eb169b8 | 3518 | return float64_do_compare(ua.s, ub.s, s, is_quiet); |
d9fe9db9 EC |
3519 | } |
3520 | ||
71bfd65c | 3521 | FloatRelation float64_compare(float64 a, float64 b, float_status *s) |
d9fe9db9 | 3522 | { |
6eb169b8 | 3523 | return float64_hs_compare(a, b, s, false); |
d9fe9db9 EC |
3524 | } |
3525 | ||
71bfd65c | 3526 | FloatRelation float64_compare_quiet(float64 a, float64 b, float_status *s) |
d9fe9db9 | 3527 | { |
6eb169b8 | 3528 | return float64_hs_compare(a, b, s, true); |
d9fe9db9 EC |
3529 | } |
3530 | ||
8282310d | 3531 | static FloatRelation QEMU_FLATTEN |
6eb169b8 | 3532 | bfloat16_do_compare(bfloat16 a, bfloat16 b, float_status *s, bool is_quiet) |
8282310d | 3533 | { |
98e256fc RH |
3534 | FloatParts64 pa, pb; |
3535 | ||
3536 | bfloat16_unpack_canonical(&pa, a, s); | |
3537 | bfloat16_unpack_canonical(&pb, b, s); | |
6eb169b8 | 3538 | return parts_compare(&pa, &pb, s, is_quiet); |
8282310d LZ |
3539 | } |
3540 | ||
3541 | FloatRelation bfloat16_compare(bfloat16 a, bfloat16 b, float_status *s) | |
3542 | { | |
6eb169b8 | 3543 | return bfloat16_do_compare(a, b, s, false); |
8282310d LZ |
3544 | } |
3545 | ||
3546 | FloatRelation bfloat16_compare_quiet(bfloat16 a, bfloat16 b, float_status *s) | |
3547 | { | |
6eb169b8 RH |
3548 | return bfloat16_do_compare(a, b, s, true); |
3549 | } | |
3550 | ||
3551 | static FloatRelation QEMU_FLATTEN | |
3552 | float128_do_compare(float128 a, float128 b, float_status *s, bool is_quiet) | |
3553 | { | |
3554 | FloatParts128 pa, pb; | |
3555 | ||
3556 | float128_unpack_canonical(&pa, a, s); | |
3557 | float128_unpack_canonical(&pb, b, s); | |
3558 | return parts_compare(&pa, &pb, s, is_quiet); | |
3559 | } | |
3560 | ||
3561 | FloatRelation float128_compare(float128 a, float128 b, float_status *s) | |
3562 | { | |
3563 | return float128_do_compare(a, b, s, false); | |
3564 | } | |
3565 | ||
3566 | FloatRelation float128_compare_quiet(float128 a, float128 b, float_status *s) | |
3567 | { | |
3568 | return float128_do_compare(a, b, s, true); | |
8282310d LZ |
3569 | } |
3570 | ||
39626b0c RH |
3571 | /* |
3572 | * Scale by 2**N | |
3573 | */ | |
0bfc9f19 AB |
3574 | |
3575 | float16 float16_scalbn(float16 a, int n, float_status *status) | |
3576 | { | |
39626b0c | 3577 | FloatParts64 p; |
98e256fc | 3578 | |
39626b0c RH |
3579 | float16_unpack_canonical(&p, a, status); |
3580 | parts_scalbn(&p, n, status); | |
3581 | return float16_round_pack_canonical(&p, status); | |
0bfc9f19 AB |
3582 | } |
3583 | ||
3584 | float32 float32_scalbn(float32 a, int n, float_status *status) | |
3585 | { | |
39626b0c | 3586 | FloatParts64 p; |
98e256fc | 3587 | |
39626b0c RH |
3588 | float32_unpack_canonical(&p, a, status); |
3589 | parts_scalbn(&p, n, status); | |
3590 | return float32_round_pack_canonical(&p, status); | |
0bfc9f19 AB |
3591 | } |
3592 | ||
3593 | float64 float64_scalbn(float64 a, int n, float_status *status) | |
3594 | { | |
39626b0c | 3595 | FloatParts64 p; |
98e256fc | 3596 | |
39626b0c RH |
3597 | float64_unpack_canonical(&p, a, status); |
3598 | parts_scalbn(&p, n, status); | |
3599 | return float64_round_pack_canonical(&p, status); | |
0bfc9f19 AB |
3600 | } |
3601 | ||
8282310d LZ |
3602 | bfloat16 bfloat16_scalbn(bfloat16 a, int n, float_status *status) |
3603 | { | |
39626b0c | 3604 | FloatParts64 p; |
98e256fc | 3605 | |
39626b0c RH |
3606 | bfloat16_unpack_canonical(&p, a, status); |
3607 | parts_scalbn(&p, n, status); | |
3608 | return bfloat16_round_pack_canonical(&p, status); | |
3609 | } | |
3610 | ||
3611 | float128 float128_scalbn(float128 a, int n, float_status *status) | |
3612 | { | |
3613 | FloatParts128 p; | |
3614 | ||
3615 | float128_unpack_canonical(&p, a, status); | |
3616 | parts_scalbn(&p, n, status); | |
3617 | return float128_round_pack_canonical(&p, status); | |
8282310d LZ |
3618 | } |
3619 | ||
c13bb2da AB |
3620 | /* |
3621 | * Square Root | |
c13bb2da AB |
3622 | */ |
3623 | ||
97ff87c0 | 3624 | float16 QEMU_FLATTEN float16_sqrt(float16 a, float_status *status) |
c13bb2da | 3625 | { |
9261b245 | 3626 | FloatParts64 p; |
98e256fc | 3627 | |
9261b245 RH |
3628 | float16_unpack_canonical(&p, a, status); |
3629 | parts_sqrt(&p, status, &float16_params); | |
3630 | return float16_round_pack_canonical(&p, status); | |
c13bb2da AB |
3631 | } |
3632 | ||
f131bae8 EC |
3633 | static float32 QEMU_SOFTFLOAT_ATTR |
3634 | soft_f32_sqrt(float32 a, float_status *status) | |
c13bb2da | 3635 | { |
9261b245 | 3636 | FloatParts64 p; |
98e256fc | 3637 | |
9261b245 RH |
3638 | float32_unpack_canonical(&p, a, status); |
3639 | parts_sqrt(&p, status, &float32_params); | |
3640 | return float32_round_pack_canonical(&p, status); | |
c13bb2da AB |
3641 | } |
3642 | ||
f131bae8 EC |
3643 | static float64 QEMU_SOFTFLOAT_ATTR |
3644 | soft_f64_sqrt(float64 a, float_status *status) | |
c13bb2da | 3645 | { |
9261b245 | 3646 | FloatParts64 p; |
98e256fc | 3647 | |
9261b245 RH |
3648 | float64_unpack_canonical(&p, a, status); |
3649 | parts_sqrt(&p, status, &float64_params); | |
3650 | return float64_round_pack_canonical(&p, status); | |
c13bb2da AB |
3651 | } |
3652 | ||
f131bae8 EC |
3653 | float32 QEMU_FLATTEN float32_sqrt(float32 xa, float_status *s) |
3654 | { | |
3655 | union_float32 ua, ur; | |
3656 | ||
3657 | ua.s = xa; | |
3658 | if (unlikely(!can_use_fpu(s))) { | |
3659 | goto soft; | |
3660 | } | |
3661 | ||
3662 | float32_input_flush1(&ua.s, s); | |
3663 | if (QEMU_HARDFLOAT_1F32_USE_FP) { | |
3664 | if (unlikely(!(fpclassify(ua.h) == FP_NORMAL || | |
3665 | fpclassify(ua.h) == FP_ZERO) || | |
3666 | signbit(ua.h))) { | |
3667 | goto soft; | |
3668 | } | |
3669 | } else if (unlikely(!float32_is_zero_or_normal(ua.s) || | |
3670 | float32_is_neg(ua.s))) { | |
3671 | goto soft; | |
3672 | } | |
3673 | ur.h = sqrtf(ua.h); | |
3674 | return ur.s; | |
3675 | ||
3676 | soft: | |
3677 | return soft_f32_sqrt(ua.s, s); | |
3678 | } | |
3679 | ||
3680 | float64 QEMU_FLATTEN float64_sqrt(float64 xa, float_status *s) | |
3681 | { | |
3682 | union_float64 ua, ur; | |
3683 | ||
3684 | ua.s = xa; | |
3685 | if (unlikely(!can_use_fpu(s))) { | |
3686 | goto soft; | |
3687 | } | |
3688 | ||
3689 | float64_input_flush1(&ua.s, s); | |
3690 | if (QEMU_HARDFLOAT_1F64_USE_FP) { | |
3691 | if (unlikely(!(fpclassify(ua.h) == FP_NORMAL || | |
3692 | fpclassify(ua.h) == FP_ZERO) || | |
3693 | signbit(ua.h))) { | |
3694 | goto soft; | |
3695 | } | |
3696 | } else if (unlikely(!float64_is_zero_or_normal(ua.s) || | |
3697 | float64_is_neg(ua.s))) { | |
3698 | goto soft; | |
3699 | } | |
3700 | ur.h = sqrt(ua.h); | |
3701 | return ur.s; | |
3702 | ||
3703 | soft: | |
3704 | return soft_f64_sqrt(ua.s, s); | |
3705 | } | |
3706 | ||
8282310d LZ |
3707 | bfloat16 QEMU_FLATTEN bfloat16_sqrt(bfloat16 a, float_status *status) |
3708 | { | |
9261b245 | 3709 | FloatParts64 p; |
98e256fc | 3710 | |
9261b245 RH |
3711 | bfloat16_unpack_canonical(&p, a, status); |
3712 | parts_sqrt(&p, status, &bfloat16_params); | |
3713 | return bfloat16_round_pack_canonical(&p, status); | |
3714 | } | |
3715 | ||
3716 | float128 QEMU_FLATTEN float128_sqrt(float128 a, float_status *status) | |
3717 | { | |
3718 | FloatParts128 p; | |
3719 | ||
3720 | float128_unpack_canonical(&p, a, status); | |
3721 | parts_sqrt(&p, status, &float128_params); | |
3722 | return float128_round_pack_canonical(&p, status); | |
8282310d LZ |
3723 | } |
3724 | ||
0218a16e RH |
3725 | /*---------------------------------------------------------------------------- |
3726 | | The pattern for a default generated NaN. | |
3727 | *----------------------------------------------------------------------------*/ | |
3728 | ||
3729 | float16 float16_default_nan(float_status *status) | |
3730 | { | |
0fc07cad RH |
3731 | FloatParts64 p; |
3732 | ||
3733 | parts_default_nan(&p, status); | |
0218a16e | 3734 | p.frac >>= float16_params.frac_shift; |
71fd178e | 3735 | return float16_pack_raw(&p); |
0218a16e RH |
3736 | } |
3737 | ||
3738 | float32 float32_default_nan(float_status *status) | |
3739 | { | |
0fc07cad RH |
3740 | FloatParts64 p; |
3741 | ||
3742 | parts_default_nan(&p, status); | |
0218a16e | 3743 | p.frac >>= float32_params.frac_shift; |
71fd178e | 3744 | return float32_pack_raw(&p); |
0218a16e RH |
3745 | } |
3746 | ||
3747 | float64 float64_default_nan(float_status *status) | |
3748 | { | |
0fc07cad RH |
3749 | FloatParts64 p; |
3750 | ||
3751 | parts_default_nan(&p, status); | |
0218a16e | 3752 | p.frac >>= float64_params.frac_shift; |
71fd178e | 3753 | return float64_pack_raw(&p); |
0218a16e RH |
3754 | } |
3755 | ||
3756 | float128 float128_default_nan(float_status *status) | |
3757 | { | |
e9034ea8 | 3758 | FloatParts128 p; |
0218a16e | 3759 | |
0fc07cad | 3760 | parts_default_nan(&p, status); |
e9034ea8 RH |
3761 | frac_shr(&p, float128_params.frac_shift); |
3762 | return float128_pack_raw(&p); | |
0218a16e | 3763 | } |
c13bb2da | 3764 | |
8282310d LZ |
3765 | bfloat16 bfloat16_default_nan(float_status *status) |
3766 | { | |
0fc07cad RH |
3767 | FloatParts64 p; |
3768 | ||
3769 | parts_default_nan(&p, status); | |
8282310d | 3770 | p.frac >>= bfloat16_params.frac_shift; |
71fd178e | 3771 | return bfloat16_pack_raw(&p); |
8282310d LZ |
3772 | } |
3773 | ||
158142c2 | 3774 | /*---------------------------------------------------------------------------- |
377ed926 RH |
3775 | | Returns a quiet NaN from a signalling NaN for the floating point value `a'. |
3776 | *----------------------------------------------------------------------------*/ | |
3777 | ||
3778 | float16 float16_silence_nan(float16 a, float_status *status) | |
3779 | { | |
3dddb203 RH |
3780 | FloatParts64 p; |
3781 | ||
3782 | float16_unpack_raw(&p, a); | |
377ed926 | 3783 | p.frac <<= float16_params.frac_shift; |
92ff426d | 3784 | parts_silence_nan(&p, status); |
377ed926 | 3785 | p.frac >>= float16_params.frac_shift; |
71fd178e | 3786 | return float16_pack_raw(&p); |
377ed926 RH |
3787 | } |
3788 | ||
3789 | float32 float32_silence_nan(float32 a, float_status *status) | |
3790 | { | |
3dddb203 RH |
3791 | FloatParts64 p; |
3792 | ||
3793 | float32_unpack_raw(&p, a); | |
377ed926 | 3794 | p.frac <<= float32_params.frac_shift; |
92ff426d | 3795 | parts_silence_nan(&p, status); |
377ed926 | 3796 | p.frac >>= float32_params.frac_shift; |
71fd178e | 3797 | return float32_pack_raw(&p); |
377ed926 RH |
3798 | } |
3799 | ||
3800 | float64 float64_silence_nan(float64 a, float_status *status) | |
3801 | { | |
3dddb203 RH |
3802 | FloatParts64 p; |
3803 | ||
3804 | float64_unpack_raw(&p, a); | |
377ed926 | 3805 | p.frac <<= float64_params.frac_shift; |
92ff426d | 3806 | parts_silence_nan(&p, status); |
377ed926 | 3807 | p.frac >>= float64_params.frac_shift; |
71fd178e | 3808 | return float64_pack_raw(&p); |
377ed926 RH |
3809 | } |
3810 | ||
8282310d LZ |
3811 | bfloat16 bfloat16_silence_nan(bfloat16 a, float_status *status) |
3812 | { | |
3dddb203 RH |
3813 | FloatParts64 p; |
3814 | ||
3815 | bfloat16_unpack_raw(&p, a); | |
8282310d | 3816 | p.frac <<= bfloat16_params.frac_shift; |
92ff426d | 3817 | parts_silence_nan(&p, status); |
8282310d | 3818 | p.frac >>= bfloat16_params.frac_shift; |
71fd178e | 3819 | return bfloat16_pack_raw(&p); |
8282310d | 3820 | } |
e6b405fe | 3821 | |
0018b1f4 RH |
3822 | float128 float128_silence_nan(float128 a, float_status *status) |
3823 | { | |
3824 | FloatParts128 p; | |
3825 | ||
3826 | float128_unpack_raw(&p, a); | |
3827 | frac_shl(&p, float128_params.frac_shift); | |
3828 | parts_silence_nan(&p, status); | |
3829 | frac_shr(&p, float128_params.frac_shift); | |
3830 | return float128_pack_raw(&p); | |
3831 | } | |
3832 | ||
e6b405fe AB |
3833 | /*---------------------------------------------------------------------------- |
3834 | | If `a' is denormal and we are in flush-to-zero mode then set the | |
3835 | | input-denormal exception and return zero. Otherwise just return the value. | |
3836 | *----------------------------------------------------------------------------*/ | |
3837 | ||
f8155c1d | 3838 | static bool parts_squash_denormal(FloatParts64 p, float_status *status) |
e6b405fe AB |
3839 | { |
3840 | if (p.exp == 0 && p.frac != 0) { | |
3841 | float_raise(float_flag_input_denormal, status); | |
3842 | return true; | |
3843 | } | |
3844 | ||
3845 | return false; | |
3846 | } | |
3847 | ||
3848 | float16 float16_squash_input_denormal(float16 a, float_status *status) | |
3849 | { | |
3850 | if (status->flush_inputs_to_zero) { | |
3dddb203 RH |
3851 | FloatParts64 p; |
3852 | ||
3853 | float16_unpack_raw(&p, a); | |
e6b405fe AB |
3854 | if (parts_squash_denormal(p, status)) { |
3855 | return float16_set_sign(float16_zero, p.sign); | |
3856 | } | |
3857 | } | |
3858 | return a; | |
3859 | } | |
3860 | ||
3861 | float32 float32_squash_input_denormal(float32 a, float_status *status) | |
3862 | { | |
3863 | if (status->flush_inputs_to_zero) { | |
3dddb203 RH |
3864 | FloatParts64 p; |
3865 | ||
3866 | float32_unpack_raw(&p, a); | |
e6b405fe AB |
3867 | if (parts_squash_denormal(p, status)) { |
3868 | return float32_set_sign(float32_zero, p.sign); | |
3869 | } | |
3870 | } | |
3871 | return a; | |
3872 | } | |
3873 | ||
3874 | float64 float64_squash_input_denormal(float64 a, float_status *status) | |
3875 | { | |
3876 | if (status->flush_inputs_to_zero) { | |
3dddb203 RH |
3877 | FloatParts64 p; |
3878 | ||
3879 | float64_unpack_raw(&p, a); | |
e6b405fe AB |
3880 | if (parts_squash_denormal(p, status)) { |
3881 | return float64_set_sign(float64_zero, p.sign); | |
3882 | } | |
3883 | } | |
3884 | return a; | |
3885 | } | |
3886 | ||
8282310d LZ |
3887 | bfloat16 bfloat16_squash_input_denormal(bfloat16 a, float_status *status) |
3888 | { | |
3889 | if (status->flush_inputs_to_zero) { | |
3dddb203 RH |
3890 | FloatParts64 p; |
3891 | ||
3892 | bfloat16_unpack_raw(&p, a); | |
8282310d LZ |
3893 | if (parts_squash_denormal(p, status)) { |
3894 | return bfloat16_set_sign(bfloat16_zero, p.sign); | |
3895 | } | |
3896 | } | |
3897 | return a; | |
3898 | } | |
3899 | ||
377ed926 | 3900 | /*---------------------------------------------------------------------------- |
158142c2 FB |
3901 | | Takes a 64-bit fixed-point value `absZ' with binary point between bits 6 |
3902 | | and 7, and returns the properly rounded 32-bit integer corresponding to the | |
3903 | | input. If `zSign' is 1, the input is negated before being converted to an | |
3904 | | integer. Bit 63 of `absZ' must be zero. Ordinarily, the fixed-point input | |
3905 | | is simply rounded to an integer, with the inexact exception raised if the | |
3906 | | input cannot be represented exactly as an integer. However, if the fixed- | |
3907 | | point input is too large, the invalid exception is raised and the largest | |
3908 | | positive or negative integer is returned. | |
3909 | *----------------------------------------------------------------------------*/ | |
3910 | ||
c120391c RH |
3911 | static int32_t roundAndPackInt32(bool zSign, uint64_t absZ, |
3912 | float_status *status) | |
158142c2 | 3913 | { |
8f506c70 | 3914 | int8_t roundingMode; |
c120391c | 3915 | bool roundNearestEven; |
8f506c70 | 3916 | int8_t roundIncrement, roundBits; |
760e1416 | 3917 | int32_t z; |
158142c2 | 3918 | |
a2f2d288 | 3919 | roundingMode = status->float_rounding_mode; |
158142c2 | 3920 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
dc355b76 PM |
3921 | switch (roundingMode) { |
3922 | case float_round_nearest_even: | |
f9288a76 | 3923 | case float_round_ties_away: |
dc355b76 PM |
3924 | roundIncrement = 0x40; |
3925 | break; | |
3926 | case float_round_to_zero: | |
3927 | roundIncrement = 0; | |
3928 | break; | |
3929 | case float_round_up: | |
3930 | roundIncrement = zSign ? 0 : 0x7f; | |
3931 | break; | |
3932 | case float_round_down: | |
3933 | roundIncrement = zSign ? 0x7f : 0; | |
3934 | break; | |
5d64abb3 RH |
3935 | case float_round_to_odd: |
3936 | roundIncrement = absZ & 0x80 ? 0 : 0x7f; | |
3937 | break; | |
dc355b76 PM |
3938 | default: |
3939 | abort(); | |
158142c2 FB |
3940 | } |
3941 | roundBits = absZ & 0x7F; | |
3942 | absZ = ( absZ + roundIncrement )>>7; | |
40662886 PMD |
3943 | if (!(roundBits ^ 0x40) && roundNearestEven) { |
3944 | absZ &= ~1; | |
3945 | } | |
158142c2 FB |
3946 | z = absZ; |
3947 | if ( zSign ) z = - z; | |
3948 | if ( ( absZ>>32 ) || ( z && ( ( z < 0 ) ^ zSign ) ) ) { | |
ff32e16e | 3949 | float_raise(float_flag_invalid, status); |
2c217da0 | 3950 | return zSign ? INT32_MIN : INT32_MAX; |
158142c2 | 3951 | } |
a2f2d288 | 3952 | if (roundBits) { |
d82f3b2d | 3953 | float_raise(float_flag_inexact, status); |
a2f2d288 | 3954 | } |
158142c2 FB |
3955 | return z; |
3956 | ||
3957 | } | |
3958 | ||
3959 | /*---------------------------------------------------------------------------- | |
3960 | | Takes the 128-bit fixed-point value formed by concatenating `absZ0' and | |
3961 | | `absZ1', with binary point between bits 63 and 64 (between the input words), | |
3962 | | and returns the properly rounded 64-bit integer corresponding to the input. | |
3963 | | If `zSign' is 1, the input is negated before being converted to an integer. | |
3964 | | Ordinarily, the fixed-point input is simply rounded to an integer, with | |
3965 | | the inexact exception raised if the input cannot be represented exactly as | |
3966 | | an integer. However, if the fixed-point input is too large, the invalid | |
3967 | | exception is raised and the largest positive or negative integer is | |
3968 | | returned. | |
3969 | *----------------------------------------------------------------------------*/ | |
3970 | ||
c120391c | 3971 | static int64_t roundAndPackInt64(bool zSign, uint64_t absZ0, uint64_t absZ1, |
e5a41ffa | 3972 | float_status *status) |
158142c2 | 3973 | { |
8f506c70 | 3974 | int8_t roundingMode; |
c120391c | 3975 | bool roundNearestEven, increment; |
760e1416 | 3976 | int64_t z; |
158142c2 | 3977 | |
a2f2d288 | 3978 | roundingMode = status->float_rounding_mode; |
158142c2 | 3979 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
dc355b76 PM |
3980 | switch (roundingMode) { |
3981 | case float_round_nearest_even: | |
f9288a76 | 3982 | case float_round_ties_away: |
dc355b76 PM |
3983 | increment = ((int64_t) absZ1 < 0); |
3984 | break; | |
3985 | case float_round_to_zero: | |
3986 | increment = 0; | |
3987 | break; | |
3988 | case float_round_up: | |
3989 | increment = !zSign && absZ1; | |
3990 | break; | |
3991 | case float_round_down: | |
3992 | increment = zSign && absZ1; | |
3993 | break; | |
5d64abb3 RH |
3994 | case float_round_to_odd: |
3995 | increment = !(absZ0 & 1) && absZ1; | |
3996 | break; | |
dc355b76 PM |
3997 | default: |
3998 | abort(); | |
158142c2 FB |
3999 | } |
4000 | if ( increment ) { | |
4001 | ++absZ0; | |
4002 | if ( absZ0 == 0 ) goto overflow; | |
40662886 PMD |
4003 | if (!(absZ1 << 1) && roundNearestEven) { |
4004 | absZ0 &= ~1; | |
4005 | } | |
158142c2 FB |
4006 | } |
4007 | z = absZ0; | |
4008 | if ( zSign ) z = - z; | |
4009 | if ( z && ( ( z < 0 ) ^ zSign ) ) { | |
4010 | overflow: | |
ff32e16e | 4011 | float_raise(float_flag_invalid, status); |
2c217da0 | 4012 | return zSign ? INT64_MIN : INT64_MAX; |
158142c2 | 4013 | } |
a2f2d288 | 4014 | if (absZ1) { |
d82f3b2d | 4015 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4016 | } |
158142c2 FB |
4017 | return z; |
4018 | ||
4019 | } | |
4020 | ||
158142c2 FB |
4021 | /*---------------------------------------------------------------------------- |
4022 | | Normalizes the subnormal single-precision floating-point value represented | |
4023 | | by the denormalized significand `aSig'. The normalized exponent and | |
4024 | | significand are stored at the locations pointed to by `zExpPtr' and | |
4025 | | `zSigPtr', respectively. | |
4026 | *----------------------------------------------------------------------------*/ | |
4027 | ||
4028 | static void | |
0c48262d | 4029 | normalizeFloat32Subnormal(uint32_t aSig, int *zExpPtr, uint32_t *zSigPtr) |
158142c2 | 4030 | { |
8f506c70 | 4031 | int8_t shiftCount; |
158142c2 | 4032 | |
0019d5c3 | 4033 | shiftCount = clz32(aSig) - 8; |
158142c2 FB |
4034 | *zSigPtr = aSig<<shiftCount; |
4035 | *zExpPtr = 1 - shiftCount; | |
4036 | ||
4037 | } | |
4038 | ||
158142c2 FB |
4039 | /*---------------------------------------------------------------------------- |
4040 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4041 | | and significand `zSig', and returns the proper single-precision floating- | |
4042 | | point value corresponding to the abstract input. Ordinarily, the abstract | |
4043 | | value is simply rounded and packed into the single-precision format, with | |
4044 | | the inexact exception raised if the abstract input cannot be represented | |
4045 | | exactly. However, if the abstract value is too large, the overflow and | |
4046 | | inexact exceptions are raised and an infinity or maximal finite value is | |
4047 | | returned. If the abstract value is too small, the input value is rounded to | |
4048 | | a subnormal number, and the underflow and inexact exceptions are raised if | |
4049 | | the abstract input cannot be represented exactly as a subnormal single- | |
4050 | | precision floating-point number. | |
4051 | | The input significand `zSig' has its binary point between bits 30 | |
4052 | | and 29, which is 7 bits to the left of the usual location. This shifted | |
4053 | | significand must be normalized or smaller. If `zSig' is not normalized, | |
4054 | | `zExp' must be 0; in that case, the result returned is a subnormal number, | |
4055 | | and it must not require rounding. In the usual case that `zSig' is | |
4056 | | normalized, `zExp' must be 1 less than the ``true'' floating-point exponent. | |
4057 | | The handling of underflow and overflow follows the IEC/IEEE Standard for | |
4058 | | Binary Floating-Point Arithmetic. | |
4059 | *----------------------------------------------------------------------------*/ | |
4060 | ||
c120391c | 4061 | static float32 roundAndPackFloat32(bool zSign, int zExp, uint32_t zSig, |
e5a41ffa | 4062 | float_status *status) |
158142c2 | 4063 | { |
8f506c70 | 4064 | int8_t roundingMode; |
c120391c | 4065 | bool roundNearestEven; |
8f506c70 | 4066 | int8_t roundIncrement, roundBits; |
c120391c | 4067 | bool isTiny; |
158142c2 | 4068 | |
a2f2d288 | 4069 | roundingMode = status->float_rounding_mode; |
158142c2 | 4070 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
dc355b76 PM |
4071 | switch (roundingMode) { |
4072 | case float_round_nearest_even: | |
f9288a76 | 4073 | case float_round_ties_away: |
dc355b76 PM |
4074 | roundIncrement = 0x40; |
4075 | break; | |
4076 | case float_round_to_zero: | |
4077 | roundIncrement = 0; | |
4078 | break; | |
4079 | case float_round_up: | |
4080 | roundIncrement = zSign ? 0 : 0x7f; | |
4081 | break; | |
4082 | case float_round_down: | |
4083 | roundIncrement = zSign ? 0x7f : 0; | |
4084 | break; | |
5d64abb3 RH |
4085 | case float_round_to_odd: |
4086 | roundIncrement = zSig & 0x80 ? 0 : 0x7f; | |
4087 | break; | |
dc355b76 PM |
4088 | default: |
4089 | abort(); | |
4090 | break; | |
158142c2 FB |
4091 | } |
4092 | roundBits = zSig & 0x7F; | |
bb98fe42 | 4093 | if ( 0xFD <= (uint16_t) zExp ) { |
158142c2 FB |
4094 | if ( ( 0xFD < zExp ) |
4095 | || ( ( zExp == 0xFD ) | |
bb98fe42 | 4096 | && ( (int32_t) ( zSig + roundIncrement ) < 0 ) ) |
158142c2 | 4097 | ) { |
5d64abb3 RH |
4098 | bool overflow_to_inf = roundingMode != float_round_to_odd && |
4099 | roundIncrement != 0; | |
ff32e16e | 4100 | float_raise(float_flag_overflow | float_flag_inexact, status); |
5d64abb3 | 4101 | return packFloat32(zSign, 0xFF, -!overflow_to_inf); |
158142c2 FB |
4102 | } |
4103 | if ( zExp < 0 ) { | |
a2f2d288 | 4104 | if (status->flush_to_zero) { |
ff32e16e | 4105 | float_raise(float_flag_output_denormal, status); |
e6afc87f PM |
4106 | return packFloat32(zSign, 0, 0); |
4107 | } | |
a828b373 RH |
4108 | isTiny = status->tininess_before_rounding |
4109 | || (zExp < -1) | |
4110 | || (zSig + roundIncrement < 0x80000000); | |
158142c2 FB |
4111 | shift32RightJamming( zSig, - zExp, &zSig ); |
4112 | zExp = 0; | |
4113 | roundBits = zSig & 0x7F; | |
ff32e16e PM |
4114 | if (isTiny && roundBits) { |
4115 | float_raise(float_flag_underflow, status); | |
4116 | } | |
5d64abb3 RH |
4117 | if (roundingMode == float_round_to_odd) { |
4118 | /* | |
4119 | * For round-to-odd case, the roundIncrement depends on | |
4120 | * zSig which just changed. | |
4121 | */ | |
4122 | roundIncrement = zSig & 0x80 ? 0 : 0x7f; | |
4123 | } | |
158142c2 FB |
4124 | } |
4125 | } | |
a2f2d288 | 4126 | if (roundBits) { |
d82f3b2d | 4127 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4128 | } |
158142c2 | 4129 | zSig = ( zSig + roundIncrement )>>7; |
40662886 PMD |
4130 | if (!(roundBits ^ 0x40) && roundNearestEven) { |
4131 | zSig &= ~1; | |
4132 | } | |
158142c2 FB |
4133 | if ( zSig == 0 ) zExp = 0; |
4134 | return packFloat32( zSign, zExp, zSig ); | |
4135 | ||
4136 | } | |
4137 | ||
4138 | /*---------------------------------------------------------------------------- | |
4139 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4140 | | and significand `zSig', and returns the proper single-precision floating- | |
4141 | | point value corresponding to the abstract input. This routine is just like | |
4142 | | `roundAndPackFloat32' except that `zSig' does not have to be normalized. | |
4143 | | Bit 31 of `zSig' must be zero, and `zExp' must be 1 less than the ``true'' | |
4144 | | floating-point exponent. | |
4145 | *----------------------------------------------------------------------------*/ | |
4146 | ||
4147 | static float32 | |
c120391c | 4148 | normalizeRoundAndPackFloat32(bool zSign, int zExp, uint32_t zSig, |
e5a41ffa | 4149 | float_status *status) |
158142c2 | 4150 | { |
8f506c70 | 4151 | int8_t shiftCount; |
158142c2 | 4152 | |
0019d5c3 | 4153 | shiftCount = clz32(zSig) - 1; |
ff32e16e PM |
4154 | return roundAndPackFloat32(zSign, zExp - shiftCount, zSig<<shiftCount, |
4155 | status); | |
158142c2 FB |
4156 | |
4157 | } | |
4158 | ||
158142c2 FB |
4159 | /*---------------------------------------------------------------------------- |
4160 | | Normalizes the subnormal double-precision floating-point value represented | |
4161 | | by the denormalized significand `aSig'. The normalized exponent and | |
4162 | | significand are stored at the locations pointed to by `zExpPtr' and | |
4163 | | `zSigPtr', respectively. | |
4164 | *----------------------------------------------------------------------------*/ | |
4165 | ||
4166 | static void | |
0c48262d | 4167 | normalizeFloat64Subnormal(uint64_t aSig, int *zExpPtr, uint64_t *zSigPtr) |
158142c2 | 4168 | { |
8f506c70 | 4169 | int8_t shiftCount; |
158142c2 | 4170 | |
0019d5c3 | 4171 | shiftCount = clz64(aSig) - 11; |
158142c2 FB |
4172 | *zSigPtr = aSig<<shiftCount; |
4173 | *zExpPtr = 1 - shiftCount; | |
4174 | ||
4175 | } | |
4176 | ||
4177 | /*---------------------------------------------------------------------------- | |
4178 | | Packs the sign `zSign', exponent `zExp', and significand `zSig' into a | |
4179 | | double-precision floating-point value, returning the result. After being | |
4180 | | shifted into the proper positions, the three fields are simply added | |
4181 | | together to form the result. This means that any integer portion of `zSig' | |
4182 | | will be added into the exponent. Since a properly normalized significand | |
4183 | | will have an integer portion equal to 1, the `zExp' input should be 1 less | |
4184 | | than the desired result exponent whenever `zSig' is a complete, normalized | |
4185 | | significand. | |
4186 | *----------------------------------------------------------------------------*/ | |
4187 | ||
c120391c | 4188 | static inline float64 packFloat64(bool zSign, int zExp, uint64_t zSig) |
158142c2 FB |
4189 | { |
4190 | ||
f090c9d4 | 4191 | return make_float64( |
bb98fe42 | 4192 | ( ( (uint64_t) zSign )<<63 ) + ( ( (uint64_t) zExp )<<52 ) + zSig); |
158142c2 FB |
4193 | |
4194 | } | |
4195 | ||
4196 | /*---------------------------------------------------------------------------- | |
4197 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4198 | | and significand `zSig', and returns the proper double-precision floating- | |
4199 | | point value corresponding to the abstract input. Ordinarily, the abstract | |
4200 | | value is simply rounded and packed into the double-precision format, with | |
4201 | | the inexact exception raised if the abstract input cannot be represented | |
4202 | | exactly. However, if the abstract value is too large, the overflow and | |
4203 | | inexact exceptions are raised and an infinity or maximal finite value is | |
a7d1ac78 PM |
4204 | | returned. If the abstract value is too small, the input value is rounded to |
4205 | | a subnormal number, and the underflow and inexact exceptions are raised if | |
4206 | | the abstract input cannot be represented exactly as a subnormal double- | |
158142c2 FB |
4207 | | precision floating-point number. |
4208 | | The input significand `zSig' has its binary point between bits 62 | |
4209 | | and 61, which is 10 bits to the left of the usual location. This shifted | |
4210 | | significand must be normalized or smaller. If `zSig' is not normalized, | |
4211 | | `zExp' must be 0; in that case, the result returned is a subnormal number, | |
4212 | | and it must not require rounding. In the usual case that `zSig' is | |
4213 | | normalized, `zExp' must be 1 less than the ``true'' floating-point exponent. | |
4214 | | The handling of underflow and overflow follows the IEC/IEEE Standard for | |
4215 | | Binary Floating-Point Arithmetic. | |
4216 | *----------------------------------------------------------------------------*/ | |
4217 | ||
c120391c | 4218 | static float64 roundAndPackFloat64(bool zSign, int zExp, uint64_t zSig, |
e5a41ffa | 4219 | float_status *status) |
158142c2 | 4220 | { |
8f506c70 | 4221 | int8_t roundingMode; |
c120391c | 4222 | bool roundNearestEven; |
0c48262d | 4223 | int roundIncrement, roundBits; |
c120391c | 4224 | bool isTiny; |
158142c2 | 4225 | |
a2f2d288 | 4226 | roundingMode = status->float_rounding_mode; |
158142c2 | 4227 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
dc355b76 PM |
4228 | switch (roundingMode) { |
4229 | case float_round_nearest_even: | |
f9288a76 | 4230 | case float_round_ties_away: |
dc355b76 PM |
4231 | roundIncrement = 0x200; |
4232 | break; | |
4233 | case float_round_to_zero: | |
4234 | roundIncrement = 0; | |
4235 | break; | |
4236 | case float_round_up: | |
4237 | roundIncrement = zSign ? 0 : 0x3ff; | |
4238 | break; | |
4239 | case float_round_down: | |
4240 | roundIncrement = zSign ? 0x3ff : 0; | |
4241 | break; | |
9ee6f678 BR |
4242 | case float_round_to_odd: |
4243 | roundIncrement = (zSig & 0x400) ? 0 : 0x3ff; | |
4244 | break; | |
dc355b76 PM |
4245 | default: |
4246 | abort(); | |
158142c2 FB |
4247 | } |
4248 | roundBits = zSig & 0x3FF; | |
bb98fe42 | 4249 | if ( 0x7FD <= (uint16_t) zExp ) { |
158142c2 FB |
4250 | if ( ( 0x7FD < zExp ) |
4251 | || ( ( zExp == 0x7FD ) | |
bb98fe42 | 4252 | && ( (int64_t) ( zSig + roundIncrement ) < 0 ) ) |
158142c2 | 4253 | ) { |
9ee6f678 BR |
4254 | bool overflow_to_inf = roundingMode != float_round_to_odd && |
4255 | roundIncrement != 0; | |
ff32e16e | 4256 | float_raise(float_flag_overflow | float_flag_inexact, status); |
9ee6f678 | 4257 | return packFloat64(zSign, 0x7FF, -(!overflow_to_inf)); |
158142c2 FB |
4258 | } |
4259 | if ( zExp < 0 ) { | |
a2f2d288 | 4260 | if (status->flush_to_zero) { |
ff32e16e | 4261 | float_raise(float_flag_output_denormal, status); |
e6afc87f PM |
4262 | return packFloat64(zSign, 0, 0); |
4263 | } | |
a828b373 RH |
4264 | isTiny = status->tininess_before_rounding |
4265 | || (zExp < -1) | |
4266 | || (zSig + roundIncrement < UINT64_C(0x8000000000000000)); | |
158142c2 FB |
4267 | shift64RightJamming( zSig, - zExp, &zSig ); |
4268 | zExp = 0; | |
4269 | roundBits = zSig & 0x3FF; | |
ff32e16e PM |
4270 | if (isTiny && roundBits) { |
4271 | float_raise(float_flag_underflow, status); | |
4272 | } | |
9ee6f678 BR |
4273 | if (roundingMode == float_round_to_odd) { |
4274 | /* | |
4275 | * For round-to-odd case, the roundIncrement depends on | |
4276 | * zSig which just changed. | |
4277 | */ | |
4278 | roundIncrement = (zSig & 0x400) ? 0 : 0x3ff; | |
4279 | } | |
158142c2 FB |
4280 | } |
4281 | } | |
a2f2d288 | 4282 | if (roundBits) { |
d82f3b2d | 4283 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4284 | } |
158142c2 | 4285 | zSig = ( zSig + roundIncrement )>>10; |
40662886 PMD |
4286 | if (!(roundBits ^ 0x200) && roundNearestEven) { |
4287 | zSig &= ~1; | |
4288 | } | |
158142c2 FB |
4289 | if ( zSig == 0 ) zExp = 0; |
4290 | return packFloat64( zSign, zExp, zSig ); | |
4291 | ||
4292 | } | |
4293 | ||
4294 | /*---------------------------------------------------------------------------- | |
4295 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4296 | | and significand `zSig', and returns the proper double-precision floating- | |
4297 | | point value corresponding to the abstract input. This routine is just like | |
4298 | | `roundAndPackFloat64' except that `zSig' does not have to be normalized. | |
4299 | | Bit 63 of `zSig' must be zero, and `zExp' must be 1 less than the ``true'' | |
4300 | | floating-point exponent. | |
4301 | *----------------------------------------------------------------------------*/ | |
4302 | ||
4303 | static float64 | |
c120391c | 4304 | normalizeRoundAndPackFloat64(bool zSign, int zExp, uint64_t zSig, |
e5a41ffa | 4305 | float_status *status) |
158142c2 | 4306 | { |
8f506c70 | 4307 | int8_t shiftCount; |
158142c2 | 4308 | |
0019d5c3 | 4309 | shiftCount = clz64(zSig) - 1; |
ff32e16e PM |
4310 | return roundAndPackFloat64(zSign, zExp - shiftCount, zSig<<shiftCount, |
4311 | status); | |
158142c2 FB |
4312 | |
4313 | } | |
4314 | ||
158142c2 FB |
4315 | /*---------------------------------------------------------------------------- |
4316 | | Normalizes the subnormal extended double-precision floating-point value | |
4317 | | represented by the denormalized significand `aSig'. The normalized exponent | |
4318 | | and significand are stored at the locations pointed to by `zExpPtr' and | |
4319 | | `zSigPtr', respectively. | |
4320 | *----------------------------------------------------------------------------*/ | |
4321 | ||
88857aca LV |
4322 | void normalizeFloatx80Subnormal(uint64_t aSig, int32_t *zExpPtr, |
4323 | uint64_t *zSigPtr) | |
158142c2 | 4324 | { |
8f506c70 | 4325 | int8_t shiftCount; |
158142c2 | 4326 | |
0019d5c3 | 4327 | shiftCount = clz64(aSig); |
158142c2 FB |
4328 | *zSigPtr = aSig<<shiftCount; |
4329 | *zExpPtr = 1 - shiftCount; | |
158142c2 FB |
4330 | } |
4331 | ||
4332 | /*---------------------------------------------------------------------------- | |
4333 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4334 | | and extended significand formed by the concatenation of `zSig0' and `zSig1', | |
4335 | | and returns the proper extended double-precision floating-point value | |
4336 | | corresponding to the abstract input. Ordinarily, the abstract value is | |
4337 | | rounded and packed into the extended double-precision format, with the | |
4338 | | inexact exception raised if the abstract input cannot be represented | |
4339 | | exactly. However, if the abstract value is too large, the overflow and | |
4340 | | inexact exceptions are raised and an infinity or maximal finite value is | |
4341 | | returned. If the abstract value is too small, the input value is rounded to | |
4342 | | a subnormal number, and the underflow and inexact exceptions are raised if | |
4343 | | the abstract input cannot be represented exactly as a subnormal extended | |
4344 | | double-precision floating-point number. | |
4345 | | If `roundingPrecision' is 32 or 64, the result is rounded to the same | |
4346 | | number of bits as single or double precision, respectively. Otherwise, the | |
4347 | | result is rounded to the full precision of the extended double-precision | |
4348 | | format. | |
4349 | | The input significand must be normalized or smaller. If the input | |
4350 | | significand is not normalized, `zExp' must be 0; in that case, the result | |
4351 | | returned is a subnormal number, and it must not require rounding. The | |
4352 | | handling of underflow and overflow follows the IEC/IEEE Standard for Binary | |
4353 | | Floating-Point Arithmetic. | |
4354 | *----------------------------------------------------------------------------*/ | |
4355 | ||
c120391c | 4356 | floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign, |
88857aca LV |
4357 | int32_t zExp, uint64_t zSig0, uint64_t zSig1, |
4358 | float_status *status) | |
158142c2 | 4359 | { |
8f506c70 | 4360 | int8_t roundingMode; |
c120391c | 4361 | bool roundNearestEven, increment, isTiny; |
f42c2224 | 4362 | int64_t roundIncrement, roundMask, roundBits; |
158142c2 | 4363 | |
a2f2d288 | 4364 | roundingMode = status->float_rounding_mode; |
158142c2 FB |
4365 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
4366 | if ( roundingPrecision == 80 ) goto precision80; | |
4367 | if ( roundingPrecision == 64 ) { | |
e9321124 AB |
4368 | roundIncrement = UINT64_C(0x0000000000000400); |
4369 | roundMask = UINT64_C(0x00000000000007FF); | |
158142c2 FB |
4370 | } |
4371 | else if ( roundingPrecision == 32 ) { | |
e9321124 AB |
4372 | roundIncrement = UINT64_C(0x0000008000000000); |
4373 | roundMask = UINT64_C(0x000000FFFFFFFFFF); | |
158142c2 FB |
4374 | } |
4375 | else { | |
4376 | goto precision80; | |
4377 | } | |
4378 | zSig0 |= ( zSig1 != 0 ); | |
dc355b76 PM |
4379 | switch (roundingMode) { |
4380 | case float_round_nearest_even: | |
f9288a76 | 4381 | case float_round_ties_away: |
dc355b76 PM |
4382 | break; |
4383 | case float_round_to_zero: | |
4384 | roundIncrement = 0; | |
4385 | break; | |
4386 | case float_round_up: | |
4387 | roundIncrement = zSign ? 0 : roundMask; | |
4388 | break; | |
4389 | case float_round_down: | |
4390 | roundIncrement = zSign ? roundMask : 0; | |
4391 | break; | |
4392 | default: | |
4393 | abort(); | |
158142c2 FB |
4394 | } |
4395 | roundBits = zSig0 & roundMask; | |
bb98fe42 | 4396 | if ( 0x7FFD <= (uint32_t) ( zExp - 1 ) ) { |
158142c2 FB |
4397 | if ( ( 0x7FFE < zExp ) |
4398 | || ( ( zExp == 0x7FFE ) && ( zSig0 + roundIncrement < zSig0 ) ) | |
4399 | ) { | |
4400 | goto overflow; | |
4401 | } | |
4402 | if ( zExp <= 0 ) { | |
a2f2d288 | 4403 | if (status->flush_to_zero) { |
ff32e16e | 4404 | float_raise(float_flag_output_denormal, status); |
e6afc87f PM |
4405 | return packFloatx80(zSign, 0, 0); |
4406 | } | |
a828b373 RH |
4407 | isTiny = status->tininess_before_rounding |
4408 | || (zExp < 0 ) | |
4409 | || (zSig0 <= zSig0 + roundIncrement); | |
158142c2 FB |
4410 | shift64RightJamming( zSig0, 1 - zExp, &zSig0 ); |
4411 | zExp = 0; | |
4412 | roundBits = zSig0 & roundMask; | |
ff32e16e PM |
4413 | if (isTiny && roundBits) { |
4414 | float_raise(float_flag_underflow, status); | |
4415 | } | |
a2f2d288 | 4416 | if (roundBits) { |
d82f3b2d | 4417 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4418 | } |
158142c2 | 4419 | zSig0 += roundIncrement; |
bb98fe42 | 4420 | if ( (int64_t) zSig0 < 0 ) zExp = 1; |
158142c2 FB |
4421 | roundIncrement = roundMask + 1; |
4422 | if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) { | |
4423 | roundMask |= roundIncrement; | |
4424 | } | |
4425 | zSig0 &= ~ roundMask; | |
4426 | return packFloatx80( zSign, zExp, zSig0 ); | |
4427 | } | |
4428 | } | |
a2f2d288 | 4429 | if (roundBits) { |
d82f3b2d | 4430 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4431 | } |
158142c2 FB |
4432 | zSig0 += roundIncrement; |
4433 | if ( zSig0 < roundIncrement ) { | |
4434 | ++zExp; | |
e9321124 | 4435 | zSig0 = UINT64_C(0x8000000000000000); |
158142c2 FB |
4436 | } |
4437 | roundIncrement = roundMask + 1; | |
4438 | if ( roundNearestEven && ( roundBits<<1 == roundIncrement ) ) { | |
4439 | roundMask |= roundIncrement; | |
4440 | } | |
4441 | zSig0 &= ~ roundMask; | |
4442 | if ( zSig0 == 0 ) zExp = 0; | |
4443 | return packFloatx80( zSign, zExp, zSig0 ); | |
4444 | precision80: | |
dc355b76 PM |
4445 | switch (roundingMode) { |
4446 | case float_round_nearest_even: | |
f9288a76 | 4447 | case float_round_ties_away: |
dc355b76 PM |
4448 | increment = ((int64_t)zSig1 < 0); |
4449 | break; | |
4450 | case float_round_to_zero: | |
4451 | increment = 0; | |
4452 | break; | |
4453 | case float_round_up: | |
4454 | increment = !zSign && zSig1; | |
4455 | break; | |
4456 | case float_round_down: | |
4457 | increment = zSign && zSig1; | |
4458 | break; | |
4459 | default: | |
4460 | abort(); | |
158142c2 | 4461 | } |
bb98fe42 | 4462 | if ( 0x7FFD <= (uint32_t) ( zExp - 1 ) ) { |
158142c2 FB |
4463 | if ( ( 0x7FFE < zExp ) |
4464 | || ( ( zExp == 0x7FFE ) | |
e9321124 | 4465 | && ( zSig0 == UINT64_C(0xFFFFFFFFFFFFFFFF) ) |
158142c2 FB |
4466 | && increment |
4467 | ) | |
4468 | ) { | |
4469 | roundMask = 0; | |
4470 | overflow: | |
ff32e16e | 4471 | float_raise(float_flag_overflow | float_flag_inexact, status); |
158142c2 FB |
4472 | if ( ( roundingMode == float_round_to_zero ) |
4473 | || ( zSign && ( roundingMode == float_round_up ) ) | |
4474 | || ( ! zSign && ( roundingMode == float_round_down ) ) | |
4475 | ) { | |
4476 | return packFloatx80( zSign, 0x7FFE, ~ roundMask ); | |
4477 | } | |
0f605c88 LV |
4478 | return packFloatx80(zSign, |
4479 | floatx80_infinity_high, | |
4480 | floatx80_infinity_low); | |
158142c2 FB |
4481 | } |
4482 | if ( zExp <= 0 ) { | |
a828b373 RH |
4483 | isTiny = status->tininess_before_rounding |
4484 | || (zExp < 0) | |
4485 | || !increment | |
4486 | || (zSig0 < UINT64_C(0xFFFFFFFFFFFFFFFF)); | |
158142c2 FB |
4487 | shift64ExtraRightJamming( zSig0, zSig1, 1 - zExp, &zSig0, &zSig1 ); |
4488 | zExp = 0; | |
ff32e16e PM |
4489 | if (isTiny && zSig1) { |
4490 | float_raise(float_flag_underflow, status); | |
4491 | } | |
a2f2d288 | 4492 | if (zSig1) { |
d82f3b2d | 4493 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4494 | } |
dc355b76 PM |
4495 | switch (roundingMode) { |
4496 | case float_round_nearest_even: | |
f9288a76 | 4497 | case float_round_ties_away: |
dc355b76 PM |
4498 | increment = ((int64_t)zSig1 < 0); |
4499 | break; | |
4500 | case float_round_to_zero: | |
4501 | increment = 0; | |
4502 | break; | |
4503 | case float_round_up: | |
4504 | increment = !zSign && zSig1; | |
4505 | break; | |
4506 | case float_round_down: | |
4507 | increment = zSign && zSig1; | |
4508 | break; | |
4509 | default: | |
4510 | abort(); | |
158142c2 FB |
4511 | } |
4512 | if ( increment ) { | |
4513 | ++zSig0; | |
40662886 PMD |
4514 | if (!(zSig1 << 1) && roundNearestEven) { |
4515 | zSig0 &= ~1; | |
4516 | } | |
bb98fe42 | 4517 | if ( (int64_t) zSig0 < 0 ) zExp = 1; |
158142c2 FB |
4518 | } |
4519 | return packFloatx80( zSign, zExp, zSig0 ); | |
4520 | } | |
4521 | } | |
a2f2d288 | 4522 | if (zSig1) { |
d82f3b2d | 4523 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4524 | } |
158142c2 FB |
4525 | if ( increment ) { |
4526 | ++zSig0; | |
4527 | if ( zSig0 == 0 ) { | |
4528 | ++zExp; | |
e9321124 | 4529 | zSig0 = UINT64_C(0x8000000000000000); |
158142c2 FB |
4530 | } |
4531 | else { | |
40662886 PMD |
4532 | if (!(zSig1 << 1) && roundNearestEven) { |
4533 | zSig0 &= ~1; | |
4534 | } | |
158142c2 FB |
4535 | } |
4536 | } | |
4537 | else { | |
4538 | if ( zSig0 == 0 ) zExp = 0; | |
4539 | } | |
4540 | return packFloatx80( zSign, zExp, zSig0 ); | |
4541 | ||
4542 | } | |
4543 | ||
4544 | /*---------------------------------------------------------------------------- | |
4545 | | Takes an abstract floating-point value having sign `zSign', exponent | |
4546 | | `zExp', and significand formed by the concatenation of `zSig0' and `zSig1', | |
4547 | | and returns the proper extended double-precision floating-point value | |
4548 | | corresponding to the abstract input. This routine is just like | |
4549 | | `roundAndPackFloatx80' except that the input significand does not have to be | |
4550 | | normalized. | |
4551 | *----------------------------------------------------------------------------*/ | |
4552 | ||
88857aca | 4553 | floatx80 normalizeRoundAndPackFloatx80(int8_t roundingPrecision, |
c120391c | 4554 | bool zSign, int32_t zExp, |
88857aca LV |
4555 | uint64_t zSig0, uint64_t zSig1, |
4556 | float_status *status) | |
158142c2 | 4557 | { |
8f506c70 | 4558 | int8_t shiftCount; |
158142c2 FB |
4559 | |
4560 | if ( zSig0 == 0 ) { | |
4561 | zSig0 = zSig1; | |
4562 | zSig1 = 0; | |
4563 | zExp -= 64; | |
4564 | } | |
0019d5c3 | 4565 | shiftCount = clz64(zSig0); |
158142c2 FB |
4566 | shortShift128Left( zSig0, zSig1, shiftCount, &zSig0, &zSig1 ); |
4567 | zExp -= shiftCount; | |
ff32e16e PM |
4568 | return roundAndPackFloatx80(roundingPrecision, zSign, zExp, |
4569 | zSig0, zSig1, status); | |
158142c2 FB |
4570 | |
4571 | } | |
4572 | ||
158142c2 FB |
4573 | /*---------------------------------------------------------------------------- |
4574 | | Returns the least-significant 64 fraction bits of the quadruple-precision | |
4575 | | floating-point value `a'. | |
4576 | *----------------------------------------------------------------------------*/ | |
4577 | ||
a49db98d | 4578 | static inline uint64_t extractFloat128Frac1( float128 a ) |
158142c2 FB |
4579 | { |
4580 | ||
4581 | return a.low; | |
4582 | ||
4583 | } | |
4584 | ||
4585 | /*---------------------------------------------------------------------------- | |
4586 | | Returns the most-significant 48 fraction bits of the quadruple-precision | |
4587 | | floating-point value `a'. | |
4588 | *----------------------------------------------------------------------------*/ | |
4589 | ||
a49db98d | 4590 | static inline uint64_t extractFloat128Frac0( float128 a ) |
158142c2 FB |
4591 | { |
4592 | ||
e9321124 | 4593 | return a.high & UINT64_C(0x0000FFFFFFFFFFFF); |
158142c2 FB |
4594 | |
4595 | } | |
4596 | ||
4597 | /*---------------------------------------------------------------------------- | |
4598 | | Returns the exponent bits of the quadruple-precision floating-point value | |
4599 | | `a'. | |
4600 | *----------------------------------------------------------------------------*/ | |
4601 | ||
f4014512 | 4602 | static inline int32_t extractFloat128Exp( float128 a ) |
158142c2 FB |
4603 | { |
4604 | ||
4605 | return ( a.high>>48 ) & 0x7FFF; | |
4606 | ||
4607 | } | |
4608 | ||
4609 | /*---------------------------------------------------------------------------- | |
4610 | | Returns the sign bit of the quadruple-precision floating-point value `a'. | |
4611 | *----------------------------------------------------------------------------*/ | |
4612 | ||
c120391c | 4613 | static inline bool extractFloat128Sign(float128 a) |
158142c2 | 4614 | { |
c120391c | 4615 | return a.high >> 63; |
158142c2 FB |
4616 | } |
4617 | ||
4618 | /*---------------------------------------------------------------------------- | |
4619 | | Normalizes the subnormal quadruple-precision floating-point value | |
4620 | | represented by the denormalized significand formed by the concatenation of | |
4621 | | `aSig0' and `aSig1'. The normalized exponent is stored at the location | |
4622 | | pointed to by `zExpPtr'. The most significant 49 bits of the normalized | |
4623 | | significand are stored at the location pointed to by `zSig0Ptr', and the | |
4624 | | least significant 64 bits of the normalized significand are stored at the | |
4625 | | location pointed to by `zSig1Ptr'. | |
4626 | *----------------------------------------------------------------------------*/ | |
4627 | ||
4628 | static void | |
4629 | normalizeFloat128Subnormal( | |
bb98fe42 AF |
4630 | uint64_t aSig0, |
4631 | uint64_t aSig1, | |
f4014512 | 4632 | int32_t *zExpPtr, |
bb98fe42 AF |
4633 | uint64_t *zSig0Ptr, |
4634 | uint64_t *zSig1Ptr | |
158142c2 FB |
4635 | ) |
4636 | { | |
8f506c70 | 4637 | int8_t shiftCount; |
158142c2 FB |
4638 | |
4639 | if ( aSig0 == 0 ) { | |
0019d5c3 | 4640 | shiftCount = clz64(aSig1) - 15; |
158142c2 FB |
4641 | if ( shiftCount < 0 ) { |
4642 | *zSig0Ptr = aSig1>>( - shiftCount ); | |
4643 | *zSig1Ptr = aSig1<<( shiftCount & 63 ); | |
4644 | } | |
4645 | else { | |
4646 | *zSig0Ptr = aSig1<<shiftCount; | |
4647 | *zSig1Ptr = 0; | |
4648 | } | |
4649 | *zExpPtr = - shiftCount - 63; | |
4650 | } | |
4651 | else { | |
0019d5c3 | 4652 | shiftCount = clz64(aSig0) - 15; |
158142c2 FB |
4653 | shortShift128Left( aSig0, aSig1, shiftCount, zSig0Ptr, zSig1Ptr ); |
4654 | *zExpPtr = 1 - shiftCount; | |
4655 | } | |
4656 | ||
4657 | } | |
4658 | ||
4659 | /*---------------------------------------------------------------------------- | |
4660 | | Packs the sign `zSign', the exponent `zExp', and the significand formed | |
4661 | | by the concatenation of `zSig0' and `zSig1' into a quadruple-precision | |
4662 | | floating-point value, returning the result. After being shifted into the | |
4663 | | proper positions, the three fields `zSign', `zExp', and `zSig0' are simply | |
4664 | | added together to form the most significant 32 bits of the result. This | |
4665 | | means that any integer portion of `zSig0' will be added into the exponent. | |
4666 | | Since a properly normalized significand will have an integer portion equal | |
4667 | | to 1, the `zExp' input should be 1 less than the desired result exponent | |
4668 | | whenever `zSig0' and `zSig1' concatenated form a complete, normalized | |
4669 | | significand. | |
4670 | *----------------------------------------------------------------------------*/ | |
4671 | ||
a49db98d | 4672 | static inline float128 |
c120391c | 4673 | packFloat128(bool zSign, int32_t zExp, uint64_t zSig0, uint64_t zSig1) |
158142c2 FB |
4674 | { |
4675 | float128 z; | |
4676 | ||
4677 | z.low = zSig1; | |
c120391c | 4678 | z.high = ((uint64_t)zSign << 63) + ((uint64_t)zExp << 48) + zSig0; |
158142c2 | 4679 | return z; |
158142c2 FB |
4680 | } |
4681 | ||
4682 | /*---------------------------------------------------------------------------- | |
4683 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4684 | | and extended significand formed by the concatenation of `zSig0', `zSig1', | |
4685 | | and `zSig2', and returns the proper quadruple-precision floating-point value | |
4686 | | corresponding to the abstract input. Ordinarily, the abstract value is | |
4687 | | simply rounded and packed into the quadruple-precision format, with the | |
4688 | | inexact exception raised if the abstract input cannot be represented | |
4689 | | exactly. However, if the abstract value is too large, the overflow and | |
4690 | | inexact exceptions are raised and an infinity or maximal finite value is | |
4691 | | returned. If the abstract value is too small, the input value is rounded to | |
4692 | | a subnormal number, and the underflow and inexact exceptions are raised if | |
4693 | | the abstract input cannot be represented exactly as a subnormal quadruple- | |
4694 | | precision floating-point number. | |
4695 | | The input significand must be normalized or smaller. If the input | |
4696 | | significand is not normalized, `zExp' must be 0; in that case, the result | |
4697 | | returned is a subnormal number, and it must not require rounding. In the | |
4698 | | usual case that the input significand is normalized, `zExp' must be 1 less | |
4699 | | than the ``true'' floating-point exponent. The handling of underflow and | |
4700 | | overflow follows the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
4701 | *----------------------------------------------------------------------------*/ | |
4702 | ||
c120391c | 4703 | static float128 roundAndPackFloat128(bool zSign, int32_t zExp, |
e5a41ffa PM |
4704 | uint64_t zSig0, uint64_t zSig1, |
4705 | uint64_t zSig2, float_status *status) | |
158142c2 | 4706 | { |
8f506c70 | 4707 | int8_t roundingMode; |
c120391c | 4708 | bool roundNearestEven, increment, isTiny; |
158142c2 | 4709 | |
a2f2d288 | 4710 | roundingMode = status->float_rounding_mode; |
158142c2 | 4711 | roundNearestEven = ( roundingMode == float_round_nearest_even ); |
dc355b76 PM |
4712 | switch (roundingMode) { |
4713 | case float_round_nearest_even: | |
f9288a76 | 4714 | case float_round_ties_away: |
dc355b76 PM |
4715 | increment = ((int64_t)zSig2 < 0); |
4716 | break; | |
4717 | case float_round_to_zero: | |
4718 | increment = 0; | |
4719 | break; | |
4720 | case float_round_up: | |
4721 | increment = !zSign && zSig2; | |
4722 | break; | |
4723 | case float_round_down: | |
4724 | increment = zSign && zSig2; | |
4725 | break; | |
9ee6f678 BR |
4726 | case float_round_to_odd: |
4727 | increment = !(zSig1 & 0x1) && zSig2; | |
4728 | break; | |
dc355b76 PM |
4729 | default: |
4730 | abort(); | |
158142c2 | 4731 | } |
bb98fe42 | 4732 | if ( 0x7FFD <= (uint32_t) zExp ) { |
158142c2 FB |
4733 | if ( ( 0x7FFD < zExp ) |
4734 | || ( ( zExp == 0x7FFD ) | |
4735 | && eq128( | |
e9321124 AB |
4736 | UINT64_C(0x0001FFFFFFFFFFFF), |
4737 | UINT64_C(0xFFFFFFFFFFFFFFFF), | |
158142c2 FB |
4738 | zSig0, |
4739 | zSig1 | |
4740 | ) | |
4741 | && increment | |
4742 | ) | |
4743 | ) { | |
ff32e16e | 4744 | float_raise(float_flag_overflow | float_flag_inexact, status); |
158142c2 FB |
4745 | if ( ( roundingMode == float_round_to_zero ) |
4746 | || ( zSign && ( roundingMode == float_round_up ) ) | |
4747 | || ( ! zSign && ( roundingMode == float_round_down ) ) | |
9ee6f678 | 4748 | || (roundingMode == float_round_to_odd) |
158142c2 FB |
4749 | ) { |
4750 | return | |
4751 | packFloat128( | |
4752 | zSign, | |
4753 | 0x7FFE, | |
e9321124 AB |
4754 | UINT64_C(0x0000FFFFFFFFFFFF), |
4755 | UINT64_C(0xFFFFFFFFFFFFFFFF) | |
158142c2 FB |
4756 | ); |
4757 | } | |
4758 | return packFloat128( zSign, 0x7FFF, 0, 0 ); | |
4759 | } | |
4760 | if ( zExp < 0 ) { | |
a2f2d288 | 4761 | if (status->flush_to_zero) { |
ff32e16e | 4762 | float_raise(float_flag_output_denormal, status); |
e6afc87f PM |
4763 | return packFloat128(zSign, 0, 0, 0); |
4764 | } | |
a828b373 RH |
4765 | isTiny = status->tininess_before_rounding |
4766 | || (zExp < -1) | |
4767 | || !increment | |
4768 | || lt128(zSig0, zSig1, | |
4769 | UINT64_C(0x0001FFFFFFFFFFFF), | |
4770 | UINT64_C(0xFFFFFFFFFFFFFFFF)); | |
158142c2 FB |
4771 | shift128ExtraRightJamming( |
4772 | zSig0, zSig1, zSig2, - zExp, &zSig0, &zSig1, &zSig2 ); | |
4773 | zExp = 0; | |
ff32e16e PM |
4774 | if (isTiny && zSig2) { |
4775 | float_raise(float_flag_underflow, status); | |
4776 | } | |
dc355b76 PM |
4777 | switch (roundingMode) { |
4778 | case float_round_nearest_even: | |
f9288a76 | 4779 | case float_round_ties_away: |
dc355b76 PM |
4780 | increment = ((int64_t)zSig2 < 0); |
4781 | break; | |
4782 | case float_round_to_zero: | |
4783 | increment = 0; | |
4784 | break; | |
4785 | case float_round_up: | |
4786 | increment = !zSign && zSig2; | |
4787 | break; | |
4788 | case float_round_down: | |
4789 | increment = zSign && zSig2; | |
4790 | break; | |
9ee6f678 BR |
4791 | case float_round_to_odd: |
4792 | increment = !(zSig1 & 0x1) && zSig2; | |
4793 | break; | |
dc355b76 PM |
4794 | default: |
4795 | abort(); | |
158142c2 FB |
4796 | } |
4797 | } | |
4798 | } | |
a2f2d288 | 4799 | if (zSig2) { |
d82f3b2d | 4800 | float_raise(float_flag_inexact, status); |
a2f2d288 | 4801 | } |
158142c2 FB |
4802 | if ( increment ) { |
4803 | add128( zSig0, zSig1, 0, 1, &zSig0, &zSig1 ); | |
40662886 PMD |
4804 | if ((zSig2 + zSig2 == 0) && roundNearestEven) { |
4805 | zSig1 &= ~1; | |
4806 | } | |
158142c2 FB |
4807 | } |
4808 | else { | |
4809 | if ( ( zSig0 | zSig1 ) == 0 ) zExp = 0; | |
4810 | } | |
4811 | return packFloat128( zSign, zExp, zSig0, zSig1 ); | |
4812 | ||
4813 | } | |
4814 | ||
4815 | /*---------------------------------------------------------------------------- | |
4816 | | Takes an abstract floating-point value having sign `zSign', exponent `zExp', | |
4817 | | and significand formed by the concatenation of `zSig0' and `zSig1', and | |
4818 | | returns the proper quadruple-precision floating-point value corresponding | |
4819 | | to the abstract input. This routine is just like `roundAndPackFloat128' | |
4820 | | except that the input significand has fewer bits and does not have to be | |
4821 | | normalized. In all cases, `zExp' must be 1 less than the ``true'' floating- | |
4822 | | point exponent. | |
4823 | *----------------------------------------------------------------------------*/ | |
4824 | ||
c120391c | 4825 | static float128 normalizeRoundAndPackFloat128(bool zSign, int32_t zExp, |
e5a41ffa PM |
4826 | uint64_t zSig0, uint64_t zSig1, |
4827 | float_status *status) | |
158142c2 | 4828 | { |
8f506c70 | 4829 | int8_t shiftCount; |
bb98fe42 | 4830 | uint64_t zSig2; |
158142c2 FB |
4831 | |
4832 | if ( zSig0 == 0 ) { | |
4833 | zSig0 = zSig1; | |
4834 | zSig1 = 0; | |
4835 | zExp -= 64; | |
4836 | } | |
0019d5c3 | 4837 | shiftCount = clz64(zSig0) - 15; |
158142c2 FB |
4838 | if ( 0 <= shiftCount ) { |
4839 | zSig2 = 0; | |
4840 | shortShift128Left( zSig0, zSig1, shiftCount, &zSig0, &zSig1 ); | |
4841 | } | |
4842 | else { | |
4843 | shift128ExtraRightJamming( | |
4844 | zSig0, zSig1, 0, - shiftCount, &zSig0, &zSig1, &zSig2 ); | |
4845 | } | |
4846 | zExp -= shiftCount; | |
ff32e16e | 4847 | return roundAndPackFloat128(zSign, zExp, zSig0, zSig1, zSig2, status); |
158142c2 FB |
4848 | |
4849 | } | |
4850 | ||
158142c2 | 4851 | |
158142c2 FB |
4852 | /*---------------------------------------------------------------------------- |
4853 | | Returns the result of converting the 32-bit two's complement integer `a' | |
4854 | | to the extended double-precision floating-point format. The conversion | |
4855 | | is performed according to the IEC/IEEE Standard for Binary Floating-Point | |
4856 | | Arithmetic. | |
4857 | *----------------------------------------------------------------------------*/ | |
4858 | ||
e5a41ffa | 4859 | floatx80 int32_to_floatx80(int32_t a, float_status *status) |
158142c2 | 4860 | { |
c120391c | 4861 | bool zSign; |
3a87d009 | 4862 | uint32_t absA; |
8f506c70 | 4863 | int8_t shiftCount; |
bb98fe42 | 4864 | uint64_t zSig; |
158142c2 FB |
4865 | |
4866 | if ( a == 0 ) return packFloatx80( 0, 0, 0 ); | |
4867 | zSign = ( a < 0 ); | |
4868 | absA = zSign ? - a : a; | |
0019d5c3 | 4869 | shiftCount = clz32(absA) + 32; |
158142c2 FB |
4870 | zSig = absA; |
4871 | return packFloatx80( zSign, 0x403E - shiftCount, zSig<<shiftCount ); | |
4872 | ||
4873 | } | |
4874 | ||
158142c2 FB |
4875 | /*---------------------------------------------------------------------------- |
4876 | | Returns the result of converting the 64-bit two's complement integer `a' | |
4877 | | to the extended double-precision floating-point format. The conversion | |
4878 | | is performed according to the IEC/IEEE Standard for Binary Floating-Point | |
4879 | | Arithmetic. | |
4880 | *----------------------------------------------------------------------------*/ | |
4881 | ||
e5a41ffa | 4882 | floatx80 int64_to_floatx80(int64_t a, float_status *status) |
158142c2 | 4883 | { |
c120391c | 4884 | bool zSign; |
182f42fd | 4885 | uint64_t absA; |
8f506c70 | 4886 | int8_t shiftCount; |
158142c2 FB |
4887 | |
4888 | if ( a == 0 ) return packFloatx80( 0, 0, 0 ); | |
4889 | zSign = ( a < 0 ); | |
4890 | absA = zSign ? - a : a; | |
0019d5c3 | 4891 | shiftCount = clz64(absA); |
158142c2 FB |
4892 | return packFloatx80( zSign, 0x403E - shiftCount, absA<<shiftCount ); |
4893 | ||
4894 | } | |
4895 | ||
158142c2 FB |
4896 | /*---------------------------------------------------------------------------- |
4897 | | Returns the result of converting the single-precision floating-point value | |
4898 | | `a' to the extended double-precision floating-point format. The conversion | |
4899 | | is performed according to the IEC/IEEE Standard for Binary Floating-Point | |
4900 | | Arithmetic. | |
4901 | *----------------------------------------------------------------------------*/ | |
4902 | ||
e5a41ffa | 4903 | floatx80 float32_to_floatx80(float32 a, float_status *status) |
158142c2 | 4904 | { |
c120391c | 4905 | bool aSign; |
0c48262d | 4906 | int aExp; |
bb98fe42 | 4907 | uint32_t aSig; |
158142c2 | 4908 | |
ff32e16e | 4909 | a = float32_squash_input_denormal(a, status); |
158142c2 FB |
4910 | aSig = extractFloat32Frac( a ); |
4911 | aExp = extractFloat32Exp( a ); | |
4912 | aSign = extractFloat32Sign( a ); | |
4913 | if ( aExp == 0xFF ) { | |
ff32e16e | 4914 | if (aSig) { |
7537c2b4 JM |
4915 | floatx80 res = commonNaNToFloatx80(float32ToCommonNaN(a, status), |
4916 | status); | |
4917 | return floatx80_silence_nan(res, status); | |
ff32e16e | 4918 | } |
0f605c88 LV |
4919 | return packFloatx80(aSign, |
4920 | floatx80_infinity_high, | |
4921 | floatx80_infinity_low); | |
158142c2 FB |
4922 | } |
4923 | if ( aExp == 0 ) { | |
4924 | if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 ); | |
4925 | normalizeFloat32Subnormal( aSig, &aExp, &aSig ); | |
4926 | } | |
4927 | aSig |= 0x00800000; | |
bb98fe42 | 4928 | return packFloatx80( aSign, aExp + 0x3F80, ( (uint64_t) aSig )<<40 ); |
158142c2 FB |
4929 | |
4930 | } | |
4931 | ||
158142c2 FB |
4932 | /*---------------------------------------------------------------------------- |
4933 | | Returns the remainder of the single-precision floating-point value `a' | |
4934 | | with respect to the corresponding value `b'. The operation is performed | |
4935 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
4936 | *----------------------------------------------------------------------------*/ | |
4937 | ||
e5a41ffa | 4938 | float32 float32_rem(float32 a, float32 b, float_status *status) |
158142c2 | 4939 | { |
c120391c | 4940 | bool aSign, zSign; |
0c48262d | 4941 | int aExp, bExp, expDiff; |
bb98fe42 AF |
4942 | uint32_t aSig, bSig; |
4943 | uint32_t q; | |
4944 | uint64_t aSig64, bSig64, q64; | |
4945 | uint32_t alternateASig; | |
4946 | int32_t sigMean; | |
ff32e16e PM |
4947 | a = float32_squash_input_denormal(a, status); |
4948 | b = float32_squash_input_denormal(b, status); | |
158142c2 FB |
4949 | |
4950 | aSig = extractFloat32Frac( a ); | |
4951 | aExp = extractFloat32Exp( a ); | |
4952 | aSign = extractFloat32Sign( a ); | |
4953 | bSig = extractFloat32Frac( b ); | |
4954 | bExp = extractFloat32Exp( b ); | |
158142c2 FB |
4955 | if ( aExp == 0xFF ) { |
4956 | if ( aSig || ( ( bExp == 0xFF ) && bSig ) ) { | |
ff32e16e | 4957 | return propagateFloat32NaN(a, b, status); |
158142c2 | 4958 | } |
ff32e16e | 4959 | float_raise(float_flag_invalid, status); |
af39bc8c | 4960 | return float32_default_nan(status); |
158142c2 FB |
4961 | } |
4962 | if ( bExp == 0xFF ) { | |
ff32e16e PM |
4963 | if (bSig) { |
4964 | return propagateFloat32NaN(a, b, status); | |
4965 | } | |
158142c2 FB |
4966 | return a; |
4967 | } | |
4968 | if ( bExp == 0 ) { | |
4969 | if ( bSig == 0 ) { | |
ff32e16e | 4970 | float_raise(float_flag_invalid, status); |
af39bc8c | 4971 | return float32_default_nan(status); |
158142c2 FB |
4972 | } |
4973 | normalizeFloat32Subnormal( bSig, &bExp, &bSig ); | |
4974 | } | |
4975 | if ( aExp == 0 ) { | |
4976 | if ( aSig == 0 ) return a; | |
4977 | normalizeFloat32Subnormal( aSig, &aExp, &aSig ); | |
4978 | } | |
4979 | expDiff = aExp - bExp; | |
4980 | aSig |= 0x00800000; | |
4981 | bSig |= 0x00800000; | |
4982 | if ( expDiff < 32 ) { | |
4983 | aSig <<= 8; | |
4984 | bSig <<= 8; | |
4985 | if ( expDiff < 0 ) { | |
4986 | if ( expDiff < -1 ) return a; | |
4987 | aSig >>= 1; | |
4988 | } | |
4989 | q = ( bSig <= aSig ); | |
4990 | if ( q ) aSig -= bSig; | |
4991 | if ( 0 < expDiff ) { | |
bb98fe42 | 4992 | q = ( ( (uint64_t) aSig )<<32 ) / bSig; |
158142c2 FB |
4993 | q >>= 32 - expDiff; |
4994 | bSig >>= 2; | |
4995 | aSig = ( ( aSig>>1 )<<( expDiff - 1 ) ) - bSig * q; | |
4996 | } | |
4997 | else { | |
4998 | aSig >>= 2; | |
4999 | bSig >>= 2; | |
5000 | } | |
5001 | } | |
5002 | else { | |
5003 | if ( bSig <= aSig ) aSig -= bSig; | |
bb98fe42 AF |
5004 | aSig64 = ( (uint64_t) aSig )<<40; |
5005 | bSig64 = ( (uint64_t) bSig )<<40; | |
158142c2 FB |
5006 | expDiff -= 64; |
5007 | while ( 0 < expDiff ) { | |
5008 | q64 = estimateDiv128To64( aSig64, 0, bSig64 ); | |
5009 | q64 = ( 2 < q64 ) ? q64 - 2 : 0; | |
5010 | aSig64 = - ( ( bSig * q64 )<<38 ); | |
5011 | expDiff -= 62; | |
5012 | } | |
5013 | expDiff += 64; | |
5014 | q64 = estimateDiv128To64( aSig64, 0, bSig64 ); | |
5015 | q64 = ( 2 < q64 ) ? q64 - 2 : 0; | |
5016 | q = q64>>( 64 - expDiff ); | |
5017 | bSig <<= 6; | |
5018 | aSig = ( ( aSig64>>33 )<<( expDiff - 1 ) ) - bSig * q; | |
5019 | } | |
5020 | do { | |
5021 | alternateASig = aSig; | |
5022 | ++q; | |
5023 | aSig -= bSig; | |
bb98fe42 | 5024 | } while ( 0 <= (int32_t) aSig ); |
158142c2 FB |
5025 | sigMean = aSig + alternateASig; |
5026 | if ( ( sigMean < 0 ) || ( ( sigMean == 0 ) && ( q & 1 ) ) ) { | |
5027 | aSig = alternateASig; | |
5028 | } | |
bb98fe42 | 5029 | zSign = ( (int32_t) aSig < 0 ); |
158142c2 | 5030 | if ( zSign ) aSig = - aSig; |
ff32e16e | 5031 | return normalizeRoundAndPackFloat32(aSign ^ zSign, bExp, aSig, status); |
158142c2 FB |
5032 | } |
5033 | ||
369be8f6 | 5034 | |
158142c2 | 5035 | |
8229c991 AJ |
5036 | /*---------------------------------------------------------------------------- |
5037 | | Returns the binary exponential of the single-precision floating-point value | |
5038 | | `a'. The operation is performed according to the IEC/IEEE Standard for | |
5039 | | Binary Floating-Point Arithmetic. | |
5040 | | | |
5041 | | Uses the following identities: | |
5042 | | | |
5043 | | 1. ------------------------------------------------------------------------- | |
5044 | | x x*ln(2) | |
5045 | | 2 = e | |
5046 | | | |
5047 | | 2. ------------------------------------------------------------------------- | |
5048 | | 2 3 4 5 n | |
5049 | | x x x x x x x | |
5050 | | e = 1 + --- + --- + --- + --- + --- + ... + --- + ... | |
5051 | | 1! 2! 3! 4! 5! n! | |
5052 | *----------------------------------------------------------------------------*/ | |
5053 | ||
5054 | static const float64 float32_exp2_coefficients[15] = | |
5055 | { | |
d5138cf4 PM |
5056 | const_float64( 0x3ff0000000000000ll ), /* 1 */ |
5057 | const_float64( 0x3fe0000000000000ll ), /* 2 */ | |
5058 | const_float64( 0x3fc5555555555555ll ), /* 3 */ | |
5059 | const_float64( 0x3fa5555555555555ll ), /* 4 */ | |
5060 | const_float64( 0x3f81111111111111ll ), /* 5 */ | |
5061 | const_float64( 0x3f56c16c16c16c17ll ), /* 6 */ | |
5062 | const_float64( 0x3f2a01a01a01a01all ), /* 7 */ | |
5063 | const_float64( 0x3efa01a01a01a01all ), /* 8 */ | |
5064 | const_float64( 0x3ec71de3a556c734ll ), /* 9 */ | |
5065 | const_float64( 0x3e927e4fb7789f5cll ), /* 10 */ | |
5066 | const_float64( 0x3e5ae64567f544e4ll ), /* 11 */ | |
5067 | const_float64( 0x3e21eed8eff8d898ll ), /* 12 */ | |
5068 | const_float64( 0x3de6124613a86d09ll ), /* 13 */ | |
5069 | const_float64( 0x3da93974a8c07c9dll ), /* 14 */ | |
5070 | const_float64( 0x3d6ae7f3e733b81fll ), /* 15 */ | |
8229c991 AJ |
5071 | }; |
5072 | ||
e5a41ffa | 5073 | float32 float32_exp2(float32 a, float_status *status) |
8229c991 | 5074 | { |
c120391c | 5075 | bool aSign; |
0c48262d | 5076 | int aExp; |
bb98fe42 | 5077 | uint32_t aSig; |
8229c991 AJ |
5078 | float64 r, x, xn; |
5079 | int i; | |
ff32e16e | 5080 | a = float32_squash_input_denormal(a, status); |
8229c991 AJ |
5081 | |
5082 | aSig = extractFloat32Frac( a ); | |
5083 | aExp = extractFloat32Exp( a ); | |
5084 | aSign = extractFloat32Sign( a ); | |
5085 | ||
5086 | if ( aExp == 0xFF) { | |
ff32e16e PM |
5087 | if (aSig) { |
5088 | return propagateFloat32NaN(a, float32_zero, status); | |
5089 | } | |
8229c991 AJ |
5090 | return (aSign) ? float32_zero : a; |
5091 | } | |
5092 | if (aExp == 0) { | |
5093 | if (aSig == 0) return float32_one; | |
5094 | } | |
5095 | ||
ff32e16e | 5096 | float_raise(float_flag_inexact, status); |
8229c991 AJ |
5097 | |
5098 | /* ******************************* */ | |
5099 | /* using float64 for approximation */ | |
5100 | /* ******************************* */ | |
ff32e16e PM |
5101 | x = float32_to_float64(a, status); |
5102 | x = float64_mul(x, float64_ln2, status); | |
8229c991 AJ |
5103 | |
5104 | xn = x; | |
5105 | r = float64_one; | |
5106 | for (i = 0 ; i < 15 ; i++) { | |
5107 | float64 f; | |
5108 | ||
ff32e16e PM |
5109 | f = float64_mul(xn, float32_exp2_coefficients[i], status); |
5110 | r = float64_add(r, f, status); | |
8229c991 | 5111 | |
ff32e16e | 5112 | xn = float64_mul(xn, x, status); |
8229c991 AJ |
5113 | } |
5114 | ||
5115 | return float64_to_float32(r, status); | |
5116 | } | |
5117 | ||
374dfc33 AJ |
5118 | /*---------------------------------------------------------------------------- |
5119 | | Returns the binary log of the single-precision floating-point value `a'. | |
5120 | | The operation is performed according to the IEC/IEEE Standard for Binary | |
5121 | | Floating-Point Arithmetic. | |
5122 | *----------------------------------------------------------------------------*/ | |
e5a41ffa | 5123 | float32 float32_log2(float32 a, float_status *status) |
374dfc33 | 5124 | { |
c120391c | 5125 | bool aSign, zSign; |
0c48262d | 5126 | int aExp; |
bb98fe42 | 5127 | uint32_t aSig, zSig, i; |
374dfc33 | 5128 | |
ff32e16e | 5129 | a = float32_squash_input_denormal(a, status); |
374dfc33 AJ |
5130 | aSig = extractFloat32Frac( a ); |
5131 | aExp = extractFloat32Exp( a ); | |
5132 | aSign = extractFloat32Sign( a ); | |
5133 | ||
5134 | if ( aExp == 0 ) { | |
5135 | if ( aSig == 0 ) return packFloat32( 1, 0xFF, 0 ); | |
5136 | normalizeFloat32Subnormal( aSig, &aExp, &aSig ); | |
5137 | } | |
5138 | if ( aSign ) { | |
ff32e16e | 5139 | float_raise(float_flag_invalid, status); |
af39bc8c | 5140 | return float32_default_nan(status); |
374dfc33 AJ |
5141 | } |
5142 | if ( aExp == 0xFF ) { | |
ff32e16e PM |
5143 | if (aSig) { |
5144 | return propagateFloat32NaN(a, float32_zero, status); | |
5145 | } | |
374dfc33 AJ |
5146 | return a; |
5147 | } | |
5148 | ||
5149 | aExp -= 0x7F; | |
5150 | aSig |= 0x00800000; | |
5151 | zSign = aExp < 0; | |
5152 | zSig = aExp << 23; | |
5153 | ||
5154 | for (i = 1 << 22; i > 0; i >>= 1) { | |
bb98fe42 | 5155 | aSig = ( (uint64_t)aSig * aSig ) >> 23; |
374dfc33 AJ |
5156 | if ( aSig & 0x01000000 ) { |
5157 | aSig >>= 1; | |
5158 | zSig |= i; | |
5159 | } | |
5160 | } | |
5161 | ||
5162 | if ( zSign ) | |
5163 | zSig = -zSig; | |
5164 | ||
ff32e16e | 5165 | return normalizeRoundAndPackFloat32(zSign, 0x85, zSig, status); |
374dfc33 AJ |
5166 | } |
5167 | ||
158142c2 | 5168 | /*---------------------------------------------------------------------------- |
158142c2 FB |
5169 | | Returns the result of converting the double-precision floating-point value |
5170 | | `a' to the extended double-precision floating-point format. The conversion | |
5171 | | is performed according to the IEC/IEEE Standard for Binary Floating-Point | |
5172 | | Arithmetic. | |
5173 | *----------------------------------------------------------------------------*/ | |
5174 | ||
e5a41ffa | 5175 | floatx80 float64_to_floatx80(float64 a, float_status *status) |
158142c2 | 5176 | { |
c120391c | 5177 | bool aSign; |
0c48262d | 5178 | int aExp; |
bb98fe42 | 5179 | uint64_t aSig; |
158142c2 | 5180 | |
ff32e16e | 5181 | a = float64_squash_input_denormal(a, status); |
158142c2 FB |
5182 | aSig = extractFloat64Frac( a ); |
5183 | aExp = extractFloat64Exp( a ); | |
5184 | aSign = extractFloat64Sign( a ); | |
5185 | if ( aExp == 0x7FF ) { | |
ff32e16e | 5186 | if (aSig) { |
7537c2b4 JM |
5187 | floatx80 res = commonNaNToFloatx80(float64ToCommonNaN(a, status), |
5188 | status); | |
5189 | return floatx80_silence_nan(res, status); | |
ff32e16e | 5190 | } |
0f605c88 LV |
5191 | return packFloatx80(aSign, |
5192 | floatx80_infinity_high, | |
5193 | floatx80_infinity_low); | |
158142c2 FB |
5194 | } |
5195 | if ( aExp == 0 ) { | |
5196 | if ( aSig == 0 ) return packFloatx80( aSign, 0, 0 ); | |
5197 | normalizeFloat64Subnormal( aSig, &aExp, &aSig ); | |
5198 | } | |
5199 | return | |
5200 | packFloatx80( | |
e9321124 | 5201 | aSign, aExp + 0x3C00, (aSig | UINT64_C(0x0010000000000000)) << 11); |
158142c2 FB |
5202 | |
5203 | } | |
5204 | ||
158142c2 FB |
5205 | /*---------------------------------------------------------------------------- |
5206 | | Returns the remainder of the double-precision floating-point value `a' | |
5207 | | with respect to the corresponding value `b'. The operation is performed | |
5208 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
5209 | *----------------------------------------------------------------------------*/ | |
5210 | ||
e5a41ffa | 5211 | float64 float64_rem(float64 a, float64 b, float_status *status) |
158142c2 | 5212 | { |
c120391c | 5213 | bool aSign, zSign; |
0c48262d | 5214 | int aExp, bExp, expDiff; |
bb98fe42 AF |
5215 | uint64_t aSig, bSig; |
5216 | uint64_t q, alternateASig; | |
5217 | int64_t sigMean; | |
158142c2 | 5218 | |
ff32e16e PM |
5219 | a = float64_squash_input_denormal(a, status); |
5220 | b = float64_squash_input_denormal(b, status); | |
158142c2 FB |
5221 | aSig = extractFloat64Frac( a ); |
5222 | aExp = extractFloat64Exp( a ); | |
5223 | aSign = extractFloat64Sign( a ); | |
5224 | bSig = extractFloat64Frac( b ); | |
5225 | bExp = extractFloat64Exp( b ); | |
158142c2 FB |
5226 | if ( aExp == 0x7FF ) { |
5227 | if ( aSig || ( ( bExp == 0x7FF ) && bSig ) ) { | |
ff32e16e | 5228 | return propagateFloat64NaN(a, b, status); |
158142c2 | 5229 | } |
ff32e16e | 5230 | float_raise(float_flag_invalid, status); |
af39bc8c | 5231 | return float64_default_nan(status); |
158142c2 FB |
5232 | } |
5233 | if ( bExp == 0x7FF ) { | |
ff32e16e PM |
5234 | if (bSig) { |
5235 | return propagateFloat64NaN(a, b, status); | |
5236 | } | |
158142c2 FB |
5237 | return a; |
5238 | } | |
5239 | if ( bExp == 0 ) { | |
5240 | if ( bSig == 0 ) { | |
ff32e16e | 5241 | float_raise(float_flag_invalid, status); |
af39bc8c | 5242 | return float64_default_nan(status); |
158142c2 FB |
5243 | } |
5244 | normalizeFloat64Subnormal( bSig, &bExp, &bSig ); | |
5245 | } | |
5246 | if ( aExp == 0 ) { | |
5247 | if ( aSig == 0 ) return a; | |
5248 | normalizeFloat64Subnormal( aSig, &aExp, &aSig ); | |
5249 | } | |
5250 | expDiff = aExp - bExp; | |
e9321124 AB |
5251 | aSig = (aSig | UINT64_C(0x0010000000000000)) << 11; |
5252 | bSig = (bSig | UINT64_C(0x0010000000000000)) << 11; | |
158142c2 FB |
5253 | if ( expDiff < 0 ) { |
5254 | if ( expDiff < -1 ) return a; | |
5255 | aSig >>= 1; | |
5256 | } | |
5257 | q = ( bSig <= aSig ); | |
5258 | if ( q ) aSig -= bSig; | |
5259 | expDiff -= 64; | |
5260 | while ( 0 < expDiff ) { | |
5261 | q = estimateDiv128To64( aSig, 0, bSig ); | |
5262 | q = ( 2 < q ) ? q - 2 : 0; | |
5263 | aSig = - ( ( bSig>>2 ) * q ); | |
5264 | expDiff -= 62; | |
5265 | } | |
5266 | expDiff += 64; | |
5267 | if ( 0 < expDiff ) { | |
5268 | q = estimateDiv128To64( aSig, 0, bSig ); | |
5269 | q = ( 2 < q ) ? q - 2 : 0; | |
5270 | q >>= 64 - expDiff; | |
5271 | bSig >>= 2; | |
5272 | aSig = ( ( aSig>>1 )<<( expDiff - 1 ) ) - bSig * q; | |
5273 | } | |
5274 | else { | |
5275 | aSig >>= 2; | |
5276 | bSig >>= 2; | |
5277 | } | |
5278 | do { | |
5279 | alternateASig = aSig; | |
5280 | ++q; | |
5281 | aSig -= bSig; | |
bb98fe42 | 5282 | } while ( 0 <= (int64_t) aSig ); |
158142c2 FB |
5283 | sigMean = aSig + alternateASig; |
5284 | if ( ( sigMean < 0 ) || ( ( sigMean == 0 ) && ( q & 1 ) ) ) { | |
5285 | aSig = alternateASig; | |
5286 | } | |
bb98fe42 | 5287 | zSign = ( (int64_t) aSig < 0 ); |
158142c2 | 5288 | if ( zSign ) aSig = - aSig; |
ff32e16e | 5289 | return normalizeRoundAndPackFloat64(aSign ^ zSign, bExp, aSig, status); |
158142c2 FB |
5290 | |
5291 | } | |
5292 | ||
374dfc33 AJ |
5293 | /*---------------------------------------------------------------------------- |
5294 | | Returns the binary log of the double-precision floating-point value `a'. | |
5295 | | The operation is performed according to the IEC/IEEE Standard for Binary | |
5296 | | Floating-Point Arithmetic. | |
5297 | *----------------------------------------------------------------------------*/ | |
e5a41ffa | 5298 | float64 float64_log2(float64 a, float_status *status) |
374dfc33 | 5299 | { |
c120391c | 5300 | bool aSign, zSign; |
0c48262d | 5301 | int aExp; |
bb98fe42 | 5302 | uint64_t aSig, aSig0, aSig1, zSig, i; |
ff32e16e | 5303 | a = float64_squash_input_denormal(a, status); |
374dfc33 AJ |
5304 | |
5305 | aSig = extractFloat64Frac( a ); | |
5306 | aExp = extractFloat64Exp( a ); | |
5307 | aSign = extractFloat64Sign( a ); | |
5308 | ||
5309 | if ( aExp == 0 ) { | |
5310 | if ( aSig == 0 ) return packFloat64( 1, 0x7FF, 0 ); | |
5311 | normalizeFloat64Subnormal( aSig, &aExp, &aSig ); | |
5312 | } | |
5313 | if ( aSign ) { | |
ff32e16e | 5314 | float_raise(float_flag_invalid, status); |
af39bc8c | 5315 | return float64_default_nan(status); |
374dfc33 AJ |
5316 | } |
5317 | if ( aExp == 0x7FF ) { | |
ff32e16e PM |
5318 | if (aSig) { |
5319 | return propagateFloat64NaN(a, float64_zero, status); | |
5320 | } | |
374dfc33 AJ |
5321 | return a; |
5322 | } | |
5323 | ||
5324 | aExp -= 0x3FF; | |
e9321124 | 5325 | aSig |= UINT64_C(0x0010000000000000); |
374dfc33 | 5326 | zSign = aExp < 0; |
bb98fe42 | 5327 | zSig = (uint64_t)aExp << 52; |
374dfc33 AJ |
5328 | for (i = 1LL << 51; i > 0; i >>= 1) { |
5329 | mul64To128( aSig, aSig, &aSig0, &aSig1 ); | |
5330 | aSig = ( aSig0 << 12 ) | ( aSig1 >> 52 ); | |
e9321124 | 5331 | if ( aSig & UINT64_C(0x0020000000000000) ) { |
374dfc33 AJ |
5332 | aSig >>= 1; |
5333 | zSig |= i; | |
5334 | } | |
5335 | } | |
5336 | ||
5337 | if ( zSign ) | |
5338 | zSig = -zSig; | |
ff32e16e | 5339 | return normalizeRoundAndPackFloat64(zSign, 0x408, zSig, status); |
374dfc33 AJ |
5340 | } |
5341 | ||
158142c2 FB |
5342 | /*---------------------------------------------------------------------------- |
5343 | | Returns the result of converting the extended double-precision floating- | |
5344 | | point value `a' to the 32-bit two's complement integer format. The | |
5345 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5346 | | Floating-Point Arithmetic---which means in particular that the conversion | |
5347 | | is rounded according to the current rounding mode. If `a' is a NaN, the | |
5348 | | largest positive integer is returned. Otherwise, if the conversion | |
5349 | | overflows, the largest integer with the same sign as `a' is returned. | |
5350 | *----------------------------------------------------------------------------*/ | |
5351 | ||
f4014512 | 5352 | int32_t floatx80_to_int32(floatx80 a, float_status *status) |
158142c2 | 5353 | { |
c120391c | 5354 | bool aSign; |
f4014512 | 5355 | int32_t aExp, shiftCount; |
bb98fe42 | 5356 | uint64_t aSig; |
158142c2 | 5357 | |
d1eb8f2a AD |
5358 | if (floatx80_invalid_encoding(a)) { |
5359 | float_raise(float_flag_invalid, status); | |
5360 | return 1 << 31; | |
5361 | } | |
158142c2 FB |
5362 | aSig = extractFloatx80Frac( a ); |
5363 | aExp = extractFloatx80Exp( a ); | |
5364 | aSign = extractFloatx80Sign( a ); | |
bb98fe42 | 5365 | if ( ( aExp == 0x7FFF ) && (uint64_t) ( aSig<<1 ) ) aSign = 0; |
158142c2 FB |
5366 | shiftCount = 0x4037 - aExp; |
5367 | if ( shiftCount <= 0 ) shiftCount = 1; | |
5368 | shift64RightJamming( aSig, shiftCount, &aSig ); | |
ff32e16e | 5369 | return roundAndPackInt32(aSign, aSig, status); |
158142c2 FB |
5370 | |
5371 | } | |
5372 | ||
5373 | /*---------------------------------------------------------------------------- | |
5374 | | Returns the result of converting the extended double-precision floating- | |
5375 | | point value `a' to the 32-bit two's complement integer format. The | |
5376 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5377 | | Floating-Point Arithmetic, except that the conversion is always rounded | |
5378 | | toward zero. If `a' is a NaN, the largest positive integer is returned. | |
5379 | | Otherwise, if the conversion overflows, the largest integer with the same | |
5380 | | sign as `a' is returned. | |
5381 | *----------------------------------------------------------------------------*/ | |
5382 | ||
f4014512 | 5383 | int32_t floatx80_to_int32_round_to_zero(floatx80 a, float_status *status) |
158142c2 | 5384 | { |
c120391c | 5385 | bool aSign; |
f4014512 | 5386 | int32_t aExp, shiftCount; |
bb98fe42 | 5387 | uint64_t aSig, savedASig; |
b3a6a2e0 | 5388 | int32_t z; |
158142c2 | 5389 | |
d1eb8f2a AD |
5390 | if (floatx80_invalid_encoding(a)) { |
5391 | float_raise(float_flag_invalid, status); | |
5392 | return 1 << 31; | |
5393 | } | |
158142c2 FB |
5394 | aSig = extractFloatx80Frac( a ); |
5395 | aExp = extractFloatx80Exp( a ); | |
5396 | aSign = extractFloatx80Sign( a ); | |
5397 | if ( 0x401E < aExp ) { | |
bb98fe42 | 5398 | if ( ( aExp == 0x7FFF ) && (uint64_t) ( aSig<<1 ) ) aSign = 0; |
158142c2 FB |
5399 | goto invalid; |
5400 | } | |
5401 | else if ( aExp < 0x3FFF ) { | |
a2f2d288 | 5402 | if (aExp || aSig) { |
d82f3b2d | 5403 | float_raise(float_flag_inexact, status); |
a2f2d288 | 5404 | } |
158142c2 FB |
5405 | return 0; |
5406 | } | |
5407 | shiftCount = 0x403E - aExp; | |
5408 | savedASig = aSig; | |
5409 | aSig >>= shiftCount; | |
5410 | z = aSig; | |
5411 | if ( aSign ) z = - z; | |
5412 | if ( ( z < 0 ) ^ aSign ) { | |
5413 | invalid: | |
ff32e16e | 5414 | float_raise(float_flag_invalid, status); |
bb98fe42 | 5415 | return aSign ? (int32_t) 0x80000000 : 0x7FFFFFFF; |
158142c2 FB |
5416 | } |
5417 | if ( ( aSig<<shiftCount ) != savedASig ) { | |
d82f3b2d | 5418 | float_raise(float_flag_inexact, status); |
158142c2 FB |
5419 | } |
5420 | return z; | |
5421 | ||
5422 | } | |
5423 | ||
5424 | /*---------------------------------------------------------------------------- | |
5425 | | Returns the result of converting the extended double-precision floating- | |
5426 | | point value `a' to the 64-bit two's complement integer format. The | |
5427 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5428 | | Floating-Point Arithmetic---which means in particular that the conversion | |
5429 | | is rounded according to the current rounding mode. If `a' is a NaN, | |
5430 | | the largest positive integer is returned. Otherwise, if the conversion | |
5431 | | overflows, the largest integer with the same sign as `a' is returned. | |
5432 | *----------------------------------------------------------------------------*/ | |
5433 | ||
f42c2224 | 5434 | int64_t floatx80_to_int64(floatx80 a, float_status *status) |
158142c2 | 5435 | { |
c120391c | 5436 | bool aSign; |
f4014512 | 5437 | int32_t aExp, shiftCount; |
bb98fe42 | 5438 | uint64_t aSig, aSigExtra; |
158142c2 | 5439 | |
d1eb8f2a AD |
5440 | if (floatx80_invalid_encoding(a)) { |
5441 | float_raise(float_flag_invalid, status); | |
5442 | return 1ULL << 63; | |
5443 | } | |
158142c2 FB |
5444 | aSig = extractFloatx80Frac( a ); |
5445 | aExp = extractFloatx80Exp( a ); | |
5446 | aSign = extractFloatx80Sign( a ); | |
5447 | shiftCount = 0x403E - aExp; | |
5448 | if ( shiftCount <= 0 ) { | |
5449 | if ( shiftCount ) { | |
ff32e16e | 5450 | float_raise(float_flag_invalid, status); |
0f605c88 | 5451 | if (!aSign || floatx80_is_any_nan(a)) { |
2c217da0 | 5452 | return INT64_MAX; |
158142c2 | 5453 | } |
2c217da0 | 5454 | return INT64_MIN; |
158142c2 FB |
5455 | } |
5456 | aSigExtra = 0; | |
5457 | } | |
5458 | else { | |
5459 | shift64ExtraRightJamming( aSig, 0, shiftCount, &aSig, &aSigExtra ); | |
5460 | } | |
ff32e16e | 5461 | return roundAndPackInt64(aSign, aSig, aSigExtra, status); |
158142c2 FB |
5462 | |
5463 | } | |
5464 | ||
5465 | /*---------------------------------------------------------------------------- | |
5466 | | Returns the result of converting the extended double-precision floating- | |
5467 | | point value `a' to the 64-bit two's complement integer format. The | |
5468 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5469 | | Floating-Point Arithmetic, except that the conversion is always rounded | |
5470 | | toward zero. If `a' is a NaN, the largest positive integer is returned. | |
5471 | | Otherwise, if the conversion overflows, the largest integer with the same | |
5472 | | sign as `a' is returned. | |
5473 | *----------------------------------------------------------------------------*/ | |
5474 | ||
f42c2224 | 5475 | int64_t floatx80_to_int64_round_to_zero(floatx80 a, float_status *status) |
158142c2 | 5476 | { |
c120391c | 5477 | bool aSign; |
f4014512 | 5478 | int32_t aExp, shiftCount; |
bb98fe42 | 5479 | uint64_t aSig; |
f42c2224 | 5480 | int64_t z; |
158142c2 | 5481 | |
d1eb8f2a AD |
5482 | if (floatx80_invalid_encoding(a)) { |
5483 | float_raise(float_flag_invalid, status); | |
5484 | return 1ULL << 63; | |
5485 | } | |
158142c2 FB |
5486 | aSig = extractFloatx80Frac( a ); |
5487 | aExp = extractFloatx80Exp( a ); | |
5488 | aSign = extractFloatx80Sign( a ); | |
5489 | shiftCount = aExp - 0x403E; | |
5490 | if ( 0 <= shiftCount ) { | |
e9321124 | 5491 | aSig &= UINT64_C(0x7FFFFFFFFFFFFFFF); |
158142c2 | 5492 | if ( ( a.high != 0xC03E ) || aSig ) { |
ff32e16e | 5493 | float_raise(float_flag_invalid, status); |
158142c2 | 5494 | if ( ! aSign || ( ( aExp == 0x7FFF ) && aSig ) ) { |
2c217da0 | 5495 | return INT64_MAX; |
158142c2 FB |
5496 | } |
5497 | } | |
2c217da0 | 5498 | return INT64_MIN; |
158142c2 FB |
5499 | } |
5500 | else if ( aExp < 0x3FFF ) { | |
a2f2d288 | 5501 | if (aExp | aSig) { |
d82f3b2d | 5502 | float_raise(float_flag_inexact, status); |
a2f2d288 | 5503 | } |
158142c2 FB |
5504 | return 0; |
5505 | } | |
5506 | z = aSig>>( - shiftCount ); | |
bb98fe42 | 5507 | if ( (uint64_t) ( aSig<<( shiftCount & 63 ) ) ) { |
d82f3b2d | 5508 | float_raise(float_flag_inexact, status); |
158142c2 FB |
5509 | } |
5510 | if ( aSign ) z = - z; | |
5511 | return z; | |
5512 | ||
5513 | } | |
5514 | ||
5515 | /*---------------------------------------------------------------------------- | |
5516 | | Returns the result of converting the extended double-precision floating- | |
5517 | | point value `a' to the single-precision floating-point format. The | |
5518 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5519 | | Floating-Point Arithmetic. | |
5520 | *----------------------------------------------------------------------------*/ | |
5521 | ||
e5a41ffa | 5522 | float32 floatx80_to_float32(floatx80 a, float_status *status) |
158142c2 | 5523 | { |
c120391c | 5524 | bool aSign; |
f4014512 | 5525 | int32_t aExp; |
bb98fe42 | 5526 | uint64_t aSig; |
158142c2 | 5527 | |
d1eb8f2a AD |
5528 | if (floatx80_invalid_encoding(a)) { |
5529 | float_raise(float_flag_invalid, status); | |
5530 | return float32_default_nan(status); | |
5531 | } | |
158142c2 FB |
5532 | aSig = extractFloatx80Frac( a ); |
5533 | aExp = extractFloatx80Exp( a ); | |
5534 | aSign = extractFloatx80Sign( a ); | |
5535 | if ( aExp == 0x7FFF ) { | |
bb98fe42 | 5536 | if ( (uint64_t) ( aSig<<1 ) ) { |
7537c2b4 JM |
5537 | float32 res = commonNaNToFloat32(floatx80ToCommonNaN(a, status), |
5538 | status); | |
5539 | return float32_silence_nan(res, status); | |
158142c2 FB |
5540 | } |
5541 | return packFloat32( aSign, 0xFF, 0 ); | |
5542 | } | |
5543 | shift64RightJamming( aSig, 33, &aSig ); | |
5544 | if ( aExp || aSig ) aExp -= 0x3F81; | |
ff32e16e | 5545 | return roundAndPackFloat32(aSign, aExp, aSig, status); |
158142c2 FB |
5546 | |
5547 | } | |
5548 | ||
5549 | /*---------------------------------------------------------------------------- | |
5550 | | Returns the result of converting the extended double-precision floating- | |
5551 | | point value `a' to the double-precision floating-point format. The | |
5552 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5553 | | Floating-Point Arithmetic. | |
5554 | *----------------------------------------------------------------------------*/ | |
5555 | ||
e5a41ffa | 5556 | float64 floatx80_to_float64(floatx80 a, float_status *status) |
158142c2 | 5557 | { |
c120391c | 5558 | bool aSign; |
f4014512 | 5559 | int32_t aExp; |
bb98fe42 | 5560 | uint64_t aSig, zSig; |
158142c2 | 5561 | |
d1eb8f2a AD |
5562 | if (floatx80_invalid_encoding(a)) { |
5563 | float_raise(float_flag_invalid, status); | |
5564 | return float64_default_nan(status); | |
5565 | } | |
158142c2 FB |
5566 | aSig = extractFloatx80Frac( a ); |
5567 | aExp = extractFloatx80Exp( a ); | |
5568 | aSign = extractFloatx80Sign( a ); | |
5569 | if ( aExp == 0x7FFF ) { | |
bb98fe42 | 5570 | if ( (uint64_t) ( aSig<<1 ) ) { |
7537c2b4 JM |
5571 | float64 res = commonNaNToFloat64(floatx80ToCommonNaN(a, status), |
5572 | status); | |
5573 | return float64_silence_nan(res, status); | |
158142c2 FB |
5574 | } |
5575 | return packFloat64( aSign, 0x7FF, 0 ); | |
5576 | } | |
5577 | shift64RightJamming( aSig, 1, &zSig ); | |
5578 | if ( aExp || aSig ) aExp -= 0x3C01; | |
ff32e16e | 5579 | return roundAndPackFloat64(aSign, aExp, zSig, status); |
158142c2 FB |
5580 | |
5581 | } | |
5582 | ||
158142c2 FB |
5583 | /*---------------------------------------------------------------------------- |
5584 | | Returns the result of converting the extended double-precision floating- | |
5585 | | point value `a' to the quadruple-precision floating-point format. The | |
5586 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
5587 | | Floating-Point Arithmetic. | |
5588 | *----------------------------------------------------------------------------*/ | |
5589 | ||
e5a41ffa | 5590 | float128 floatx80_to_float128(floatx80 a, float_status *status) |
158142c2 | 5591 | { |
c120391c | 5592 | bool aSign; |
0c48262d | 5593 | int aExp; |
bb98fe42 | 5594 | uint64_t aSig, zSig0, zSig1; |
158142c2 | 5595 | |
d1eb8f2a AD |
5596 | if (floatx80_invalid_encoding(a)) { |
5597 | float_raise(float_flag_invalid, status); | |
5598 | return float128_default_nan(status); | |
5599 | } | |
158142c2 FB |
5600 | aSig = extractFloatx80Frac( a ); |
5601 | aExp = extractFloatx80Exp( a ); | |
5602 | aSign = extractFloatx80Sign( a ); | |
bb98fe42 | 5603 | if ( ( aExp == 0x7FFF ) && (uint64_t) ( aSig<<1 ) ) { |
7537c2b4 JM |
5604 | float128 res = commonNaNToFloat128(floatx80ToCommonNaN(a, status), |
5605 | status); | |
5606 | return float128_silence_nan(res, status); | |
158142c2 FB |
5607 | } |
5608 | shift128Right( aSig<<1, 0, 16, &zSig0, &zSig1 ); | |
5609 | return packFloat128( aSign, aExp, zSig0, zSig1 ); | |
5610 | ||
5611 | } | |
5612 | ||
0f721292 LV |
5613 | /*---------------------------------------------------------------------------- |
5614 | | Rounds the extended double-precision floating-point value `a' | |
5615 | | to the precision provided by floatx80_rounding_precision and returns the | |
5616 | | result as an extended double-precision floating-point value. | |
5617 | | The operation is performed according to the IEC/IEEE Standard for Binary | |
5618 | | Floating-Point Arithmetic. | |
5619 | *----------------------------------------------------------------------------*/ | |
5620 | ||
5621 | floatx80 floatx80_round(floatx80 a, float_status *status) | |
5622 | { | |
5623 | return roundAndPackFloatx80(status->floatx80_rounding_precision, | |
5624 | extractFloatx80Sign(a), | |
5625 | extractFloatx80Exp(a), | |
5626 | extractFloatx80Frac(a), 0, status); | |
5627 | } | |
5628 | ||
158142c2 FB |
5629 | /*---------------------------------------------------------------------------- |
5630 | | Rounds the extended double-precision floating-point value `a' to an integer, | |
5631 | | and returns the result as an extended quadruple-precision floating-point | |
5632 | | value. The operation is performed according to the IEC/IEEE Standard for | |
5633 | | Binary Floating-Point Arithmetic. | |
5634 | *----------------------------------------------------------------------------*/ | |
5635 | ||
e5a41ffa | 5636 | floatx80 floatx80_round_to_int(floatx80 a, float_status *status) |
158142c2 | 5637 | { |
c120391c | 5638 | bool aSign; |
f4014512 | 5639 | int32_t aExp; |
bb98fe42 | 5640 | uint64_t lastBitMask, roundBitsMask; |
158142c2 FB |
5641 | floatx80 z; |
5642 | ||
d1eb8f2a AD |
5643 | if (floatx80_invalid_encoding(a)) { |
5644 | float_raise(float_flag_invalid, status); | |
5645 | return floatx80_default_nan(status); | |
5646 | } | |
158142c2 FB |
5647 | aExp = extractFloatx80Exp( a ); |
5648 | if ( 0x403E <= aExp ) { | |
bb98fe42 | 5649 | if ( ( aExp == 0x7FFF ) && (uint64_t) ( extractFloatx80Frac( a )<<1 ) ) { |
ff32e16e | 5650 | return propagateFloatx80NaN(a, a, status); |
158142c2 FB |
5651 | } |
5652 | return a; | |
5653 | } | |
5654 | if ( aExp < 0x3FFF ) { | |
5655 | if ( ( aExp == 0 ) | |
9ecaf5cc | 5656 | && ( (uint64_t) ( extractFloatx80Frac( a ) ) == 0 ) ) { |
158142c2 FB |
5657 | return a; |
5658 | } | |
d82f3b2d | 5659 | float_raise(float_flag_inexact, status); |
158142c2 | 5660 | aSign = extractFloatx80Sign( a ); |
a2f2d288 | 5661 | switch (status->float_rounding_mode) { |
158142c2 | 5662 | case float_round_nearest_even: |
bb98fe42 | 5663 | if ( ( aExp == 0x3FFE ) && (uint64_t) ( extractFloatx80Frac( a )<<1 ) |
158142c2 FB |
5664 | ) { |
5665 | return | |
e9321124 | 5666 | packFloatx80( aSign, 0x3FFF, UINT64_C(0x8000000000000000)); |
158142c2 FB |
5667 | } |
5668 | break; | |
f9288a76 PM |
5669 | case float_round_ties_away: |
5670 | if (aExp == 0x3FFE) { | |
e9321124 | 5671 | return packFloatx80(aSign, 0x3FFF, UINT64_C(0x8000000000000000)); |
f9288a76 PM |
5672 | } |
5673 | break; | |
158142c2 FB |
5674 | case float_round_down: |
5675 | return | |
5676 | aSign ? | |
e9321124 | 5677 | packFloatx80( 1, 0x3FFF, UINT64_C(0x8000000000000000)) |
158142c2 FB |
5678 | : packFloatx80( 0, 0, 0 ); |
5679 | case float_round_up: | |
5680 | return | |
5681 | aSign ? packFloatx80( 1, 0, 0 ) | |
e9321124 | 5682 | : packFloatx80( 0, 0x3FFF, UINT64_C(0x8000000000000000)); |
3dede407 RH |
5683 | |
5684 | case float_round_to_zero: | |
5685 | break; | |
5686 | default: | |
5687 | g_assert_not_reached(); | |
158142c2 FB |
5688 | } |
5689 | return packFloatx80( aSign, 0, 0 ); | |
5690 | } | |
5691 | lastBitMask = 1; | |
5692 | lastBitMask <<= 0x403E - aExp; | |
5693 | roundBitsMask = lastBitMask - 1; | |
5694 | z = a; | |
a2f2d288 | 5695 | switch (status->float_rounding_mode) { |
dc355b76 | 5696 | case float_round_nearest_even: |
158142c2 | 5697 | z.low += lastBitMask>>1; |
dc355b76 PM |
5698 | if ((z.low & roundBitsMask) == 0) { |
5699 | z.low &= ~lastBitMask; | |
5700 | } | |
5701 | break; | |
f9288a76 PM |
5702 | case float_round_ties_away: |
5703 | z.low += lastBitMask >> 1; | |
5704 | break; | |
dc355b76 PM |
5705 | case float_round_to_zero: |
5706 | break; | |
5707 | case float_round_up: | |
5708 | if (!extractFloatx80Sign(z)) { | |
5709 | z.low += roundBitsMask; | |
5710 | } | |
5711 | break; | |
5712 | case float_round_down: | |
5713 | if (extractFloatx80Sign(z)) { | |
158142c2 FB |
5714 | z.low += roundBitsMask; |
5715 | } | |
dc355b76 PM |
5716 | break; |
5717 | default: | |
5718 | abort(); | |
158142c2 FB |
5719 | } |
5720 | z.low &= ~ roundBitsMask; | |
5721 | if ( z.low == 0 ) { | |
5722 | ++z.high; | |
e9321124 | 5723 | z.low = UINT64_C(0x8000000000000000); |
158142c2 | 5724 | } |
a2f2d288 | 5725 | if (z.low != a.low) { |
d82f3b2d | 5726 | float_raise(float_flag_inexact, status); |
a2f2d288 | 5727 | } |
158142c2 FB |
5728 | return z; |
5729 | ||
5730 | } | |
5731 | ||
5732 | /*---------------------------------------------------------------------------- | |
5733 | | Returns the result of adding the absolute values of the extended double- | |
5734 | | precision floating-point values `a' and `b'. If `zSign' is 1, the sum is | |
5735 | | negated before being returned. `zSign' is ignored if the result is a NaN. | |
5736 | | The addition is performed according to the IEC/IEEE Standard for Binary | |
5737 | | Floating-Point Arithmetic. | |
5738 | *----------------------------------------------------------------------------*/ | |
5739 | ||
c120391c | 5740 | static floatx80 addFloatx80Sigs(floatx80 a, floatx80 b, bool zSign, |
e5a41ffa | 5741 | float_status *status) |
158142c2 | 5742 | { |
f4014512 | 5743 | int32_t aExp, bExp, zExp; |
bb98fe42 | 5744 | uint64_t aSig, bSig, zSig0, zSig1; |
f4014512 | 5745 | int32_t expDiff; |
158142c2 FB |
5746 | |
5747 | aSig = extractFloatx80Frac( a ); | |
5748 | aExp = extractFloatx80Exp( a ); | |
5749 | bSig = extractFloatx80Frac( b ); | |
5750 | bExp = extractFloatx80Exp( b ); | |
5751 | expDiff = aExp - bExp; | |
5752 | if ( 0 < expDiff ) { | |
5753 | if ( aExp == 0x7FFF ) { | |
ff32e16e PM |
5754 | if ((uint64_t)(aSig << 1)) { |
5755 | return propagateFloatx80NaN(a, b, status); | |
5756 | } | |
158142c2 FB |
5757 | return a; |
5758 | } | |
5759 | if ( bExp == 0 ) --expDiff; | |
5760 | shift64ExtraRightJamming( bSig, 0, expDiff, &bSig, &zSig1 ); | |
5761 | zExp = aExp; | |
5762 | } | |
5763 | else if ( expDiff < 0 ) { | |
5764 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
5765 | if ((uint64_t)(bSig << 1)) { |
5766 | return propagateFloatx80NaN(a, b, status); | |
5767 | } | |
0f605c88 LV |
5768 | return packFloatx80(zSign, |
5769 | floatx80_infinity_high, | |
5770 | floatx80_infinity_low); | |
158142c2 FB |
5771 | } |
5772 | if ( aExp == 0 ) ++expDiff; | |
5773 | shift64ExtraRightJamming( aSig, 0, - expDiff, &aSig, &zSig1 ); | |
5774 | zExp = bExp; | |
5775 | } | |
5776 | else { | |
5777 | if ( aExp == 0x7FFF ) { | |
bb98fe42 | 5778 | if ( (uint64_t) ( ( aSig | bSig )<<1 ) ) { |
ff32e16e | 5779 | return propagateFloatx80NaN(a, b, status); |
158142c2 FB |
5780 | } |
5781 | return a; | |
5782 | } | |
5783 | zSig1 = 0; | |
5784 | zSig0 = aSig + bSig; | |
5785 | if ( aExp == 0 ) { | |
41602807 JM |
5786 | if ((aSig | bSig) & UINT64_C(0x8000000000000000) && zSig0 < aSig) { |
5787 | /* At least one of the values is a pseudo-denormal, | |
5788 | * and there is a carry out of the result. */ | |
5789 | zExp = 1; | |
5790 | goto shiftRight1; | |
5791 | } | |
2f311075 RH |
5792 | if (zSig0 == 0) { |
5793 | return packFloatx80(zSign, 0, 0); | |
5794 | } | |
158142c2 FB |
5795 | normalizeFloatx80Subnormal( zSig0, &zExp, &zSig0 ); |
5796 | goto roundAndPack; | |
5797 | } | |
5798 | zExp = aExp; | |
5799 | goto shiftRight1; | |
5800 | } | |
5801 | zSig0 = aSig + bSig; | |
bb98fe42 | 5802 | if ( (int64_t) zSig0 < 0 ) goto roundAndPack; |
158142c2 FB |
5803 | shiftRight1: |
5804 | shift64ExtraRightJamming( zSig0, zSig1, 1, &zSig0, &zSig1 ); | |
e9321124 | 5805 | zSig0 |= UINT64_C(0x8000000000000000); |
158142c2 FB |
5806 | ++zExp; |
5807 | roundAndPack: | |
a2f2d288 | 5808 | return roundAndPackFloatx80(status->floatx80_rounding_precision, |
ff32e16e | 5809 | zSign, zExp, zSig0, zSig1, status); |
158142c2 FB |
5810 | } |
5811 | ||
5812 | /*---------------------------------------------------------------------------- | |
5813 | | Returns the result of subtracting the absolute values of the extended | |
5814 | | double-precision floating-point values `a' and `b'. If `zSign' is 1, the | |
5815 | | difference is negated before being returned. `zSign' is ignored if the | |
5816 | | result is a NaN. The subtraction is performed according to the IEC/IEEE | |
5817 | | Standard for Binary Floating-Point Arithmetic. | |
5818 | *----------------------------------------------------------------------------*/ | |
5819 | ||
c120391c | 5820 | static floatx80 subFloatx80Sigs(floatx80 a, floatx80 b, bool zSign, |
e5a41ffa | 5821 | float_status *status) |
158142c2 | 5822 | { |
f4014512 | 5823 | int32_t aExp, bExp, zExp; |
bb98fe42 | 5824 | uint64_t aSig, bSig, zSig0, zSig1; |
f4014512 | 5825 | int32_t expDiff; |
158142c2 FB |
5826 | |
5827 | aSig = extractFloatx80Frac( a ); | |
5828 | aExp = extractFloatx80Exp( a ); | |
5829 | bSig = extractFloatx80Frac( b ); | |
5830 | bExp = extractFloatx80Exp( b ); | |
5831 | expDiff = aExp - bExp; | |
5832 | if ( 0 < expDiff ) goto aExpBigger; | |
5833 | if ( expDiff < 0 ) goto bExpBigger; | |
5834 | if ( aExp == 0x7FFF ) { | |
bb98fe42 | 5835 | if ( (uint64_t) ( ( aSig | bSig )<<1 ) ) { |
ff32e16e | 5836 | return propagateFloatx80NaN(a, b, status); |
158142c2 | 5837 | } |
ff32e16e | 5838 | float_raise(float_flag_invalid, status); |
af39bc8c | 5839 | return floatx80_default_nan(status); |
158142c2 FB |
5840 | } |
5841 | if ( aExp == 0 ) { | |
5842 | aExp = 1; | |
5843 | bExp = 1; | |
5844 | } | |
5845 | zSig1 = 0; | |
5846 | if ( bSig < aSig ) goto aBigger; | |
5847 | if ( aSig < bSig ) goto bBigger; | |
a2f2d288 | 5848 | return packFloatx80(status->float_rounding_mode == float_round_down, 0, 0); |
158142c2 FB |
5849 | bExpBigger: |
5850 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
5851 | if ((uint64_t)(bSig << 1)) { |
5852 | return propagateFloatx80NaN(a, b, status); | |
5853 | } | |
0f605c88 LV |
5854 | return packFloatx80(zSign ^ 1, floatx80_infinity_high, |
5855 | floatx80_infinity_low); | |
158142c2 FB |
5856 | } |
5857 | if ( aExp == 0 ) ++expDiff; | |
5858 | shift128RightJamming( aSig, 0, - expDiff, &aSig, &zSig1 ); | |
5859 | bBigger: | |
5860 | sub128( bSig, 0, aSig, zSig1, &zSig0, &zSig1 ); | |
5861 | zExp = bExp; | |
5862 | zSign ^= 1; | |
5863 | goto normalizeRoundAndPack; | |
5864 | aExpBigger: | |
5865 | if ( aExp == 0x7FFF ) { | |
ff32e16e PM |
5866 | if ((uint64_t)(aSig << 1)) { |
5867 | return propagateFloatx80NaN(a, b, status); | |
5868 | } | |
158142c2 FB |
5869 | return a; |
5870 | } | |
5871 | if ( bExp == 0 ) --expDiff; | |
5872 | shift128RightJamming( bSig, 0, expDiff, &bSig, &zSig1 ); | |
5873 | aBigger: | |
5874 | sub128( aSig, 0, bSig, zSig1, &zSig0, &zSig1 ); | |
5875 | zExp = aExp; | |
5876 | normalizeRoundAndPack: | |
a2f2d288 | 5877 | return normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision, |
ff32e16e | 5878 | zSign, zExp, zSig0, zSig1, status); |
158142c2 FB |
5879 | } |
5880 | ||
5881 | /*---------------------------------------------------------------------------- | |
5882 | | Returns the result of adding the extended double-precision floating-point | |
5883 | | values `a' and `b'. The operation is performed according to the IEC/IEEE | |
5884 | | Standard for Binary Floating-Point Arithmetic. | |
5885 | *----------------------------------------------------------------------------*/ | |
5886 | ||
e5a41ffa | 5887 | floatx80 floatx80_add(floatx80 a, floatx80 b, float_status *status) |
158142c2 | 5888 | { |
c120391c | 5889 | bool aSign, bSign; |
158142c2 | 5890 | |
d1eb8f2a AD |
5891 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
5892 | float_raise(float_flag_invalid, status); | |
5893 | return floatx80_default_nan(status); | |
5894 | } | |
158142c2 FB |
5895 | aSign = extractFloatx80Sign( a ); |
5896 | bSign = extractFloatx80Sign( b ); | |
5897 | if ( aSign == bSign ) { | |
ff32e16e | 5898 | return addFloatx80Sigs(a, b, aSign, status); |
158142c2 FB |
5899 | } |
5900 | else { | |
ff32e16e | 5901 | return subFloatx80Sigs(a, b, aSign, status); |
158142c2 FB |
5902 | } |
5903 | ||
5904 | } | |
5905 | ||
5906 | /*---------------------------------------------------------------------------- | |
5907 | | Returns the result of subtracting the extended double-precision floating- | |
5908 | | point values `a' and `b'. The operation is performed according to the | |
5909 | | IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
5910 | *----------------------------------------------------------------------------*/ | |
5911 | ||
e5a41ffa | 5912 | floatx80 floatx80_sub(floatx80 a, floatx80 b, float_status *status) |
158142c2 | 5913 | { |
c120391c | 5914 | bool aSign, bSign; |
158142c2 | 5915 | |
d1eb8f2a AD |
5916 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
5917 | float_raise(float_flag_invalid, status); | |
5918 | return floatx80_default_nan(status); | |
5919 | } | |
158142c2 FB |
5920 | aSign = extractFloatx80Sign( a ); |
5921 | bSign = extractFloatx80Sign( b ); | |
5922 | if ( aSign == bSign ) { | |
ff32e16e | 5923 | return subFloatx80Sigs(a, b, aSign, status); |
158142c2 FB |
5924 | } |
5925 | else { | |
ff32e16e | 5926 | return addFloatx80Sigs(a, b, aSign, status); |
158142c2 FB |
5927 | } |
5928 | ||
5929 | } | |
5930 | ||
5931 | /*---------------------------------------------------------------------------- | |
5932 | | Returns the result of multiplying the extended double-precision floating- | |
5933 | | point values `a' and `b'. The operation is performed according to the | |
5934 | | IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
5935 | *----------------------------------------------------------------------------*/ | |
5936 | ||
e5a41ffa | 5937 | floatx80 floatx80_mul(floatx80 a, floatx80 b, float_status *status) |
158142c2 | 5938 | { |
c120391c | 5939 | bool aSign, bSign, zSign; |
f4014512 | 5940 | int32_t aExp, bExp, zExp; |
bb98fe42 | 5941 | uint64_t aSig, bSig, zSig0, zSig1; |
158142c2 | 5942 | |
d1eb8f2a AD |
5943 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
5944 | float_raise(float_flag_invalid, status); | |
5945 | return floatx80_default_nan(status); | |
5946 | } | |
158142c2 FB |
5947 | aSig = extractFloatx80Frac( a ); |
5948 | aExp = extractFloatx80Exp( a ); | |
5949 | aSign = extractFloatx80Sign( a ); | |
5950 | bSig = extractFloatx80Frac( b ); | |
5951 | bExp = extractFloatx80Exp( b ); | |
5952 | bSign = extractFloatx80Sign( b ); | |
5953 | zSign = aSign ^ bSign; | |
5954 | if ( aExp == 0x7FFF ) { | |
bb98fe42 AF |
5955 | if ( (uint64_t) ( aSig<<1 ) |
5956 | || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) { | |
ff32e16e | 5957 | return propagateFloatx80NaN(a, b, status); |
158142c2 FB |
5958 | } |
5959 | if ( ( bExp | bSig ) == 0 ) goto invalid; | |
0f605c88 LV |
5960 | return packFloatx80(zSign, floatx80_infinity_high, |
5961 | floatx80_infinity_low); | |
158142c2 FB |
5962 | } |
5963 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
5964 | if ((uint64_t)(bSig << 1)) { |
5965 | return propagateFloatx80NaN(a, b, status); | |
5966 | } | |
158142c2 FB |
5967 | if ( ( aExp | aSig ) == 0 ) { |
5968 | invalid: | |
ff32e16e | 5969 | float_raise(float_flag_invalid, status); |
af39bc8c | 5970 | return floatx80_default_nan(status); |
158142c2 | 5971 | } |
0f605c88 LV |
5972 | return packFloatx80(zSign, floatx80_infinity_high, |
5973 | floatx80_infinity_low); | |
158142c2 FB |
5974 | } |
5975 | if ( aExp == 0 ) { | |
5976 | if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 ); | |
5977 | normalizeFloatx80Subnormal( aSig, &aExp, &aSig ); | |
5978 | } | |
5979 | if ( bExp == 0 ) { | |
5980 | if ( bSig == 0 ) return packFloatx80( zSign, 0, 0 ); | |
5981 | normalizeFloatx80Subnormal( bSig, &bExp, &bSig ); | |
5982 | } | |
5983 | zExp = aExp + bExp - 0x3FFE; | |
5984 | mul64To128( aSig, bSig, &zSig0, &zSig1 ); | |
bb98fe42 | 5985 | if ( 0 < (int64_t) zSig0 ) { |
158142c2 FB |
5986 | shortShift128Left( zSig0, zSig1, 1, &zSig0, &zSig1 ); |
5987 | --zExp; | |
5988 | } | |
a2f2d288 | 5989 | return roundAndPackFloatx80(status->floatx80_rounding_precision, |
ff32e16e | 5990 | zSign, zExp, zSig0, zSig1, status); |
158142c2 FB |
5991 | } |
5992 | ||
5993 | /*---------------------------------------------------------------------------- | |
5994 | | Returns the result of dividing the extended double-precision floating-point | |
5995 | | value `a' by the corresponding value `b'. The operation is performed | |
5996 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
5997 | *----------------------------------------------------------------------------*/ | |
5998 | ||
e5a41ffa | 5999 | floatx80 floatx80_div(floatx80 a, floatx80 b, float_status *status) |
158142c2 | 6000 | { |
c120391c | 6001 | bool aSign, bSign, zSign; |
f4014512 | 6002 | int32_t aExp, bExp, zExp; |
bb98fe42 AF |
6003 | uint64_t aSig, bSig, zSig0, zSig1; |
6004 | uint64_t rem0, rem1, rem2, term0, term1, term2; | |
158142c2 | 6005 | |
d1eb8f2a AD |
6006 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
6007 | float_raise(float_flag_invalid, status); | |
6008 | return floatx80_default_nan(status); | |
6009 | } | |
158142c2 FB |
6010 | aSig = extractFloatx80Frac( a ); |
6011 | aExp = extractFloatx80Exp( a ); | |
6012 | aSign = extractFloatx80Sign( a ); | |
6013 | bSig = extractFloatx80Frac( b ); | |
6014 | bExp = extractFloatx80Exp( b ); | |
6015 | bSign = extractFloatx80Sign( b ); | |
6016 | zSign = aSign ^ bSign; | |
6017 | if ( aExp == 0x7FFF ) { | |
ff32e16e PM |
6018 | if ((uint64_t)(aSig << 1)) { |
6019 | return propagateFloatx80NaN(a, b, status); | |
6020 | } | |
158142c2 | 6021 | if ( bExp == 0x7FFF ) { |
ff32e16e PM |
6022 | if ((uint64_t)(bSig << 1)) { |
6023 | return propagateFloatx80NaN(a, b, status); | |
6024 | } | |
158142c2 FB |
6025 | goto invalid; |
6026 | } | |
0f605c88 LV |
6027 | return packFloatx80(zSign, floatx80_infinity_high, |
6028 | floatx80_infinity_low); | |
158142c2 FB |
6029 | } |
6030 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
6031 | if ((uint64_t)(bSig << 1)) { |
6032 | return propagateFloatx80NaN(a, b, status); | |
6033 | } | |
158142c2 FB |
6034 | return packFloatx80( zSign, 0, 0 ); |
6035 | } | |
6036 | if ( bExp == 0 ) { | |
6037 | if ( bSig == 0 ) { | |
6038 | if ( ( aExp | aSig ) == 0 ) { | |
6039 | invalid: | |
ff32e16e | 6040 | float_raise(float_flag_invalid, status); |
af39bc8c | 6041 | return floatx80_default_nan(status); |
158142c2 | 6042 | } |
ff32e16e | 6043 | float_raise(float_flag_divbyzero, status); |
0f605c88 LV |
6044 | return packFloatx80(zSign, floatx80_infinity_high, |
6045 | floatx80_infinity_low); | |
158142c2 FB |
6046 | } |
6047 | normalizeFloatx80Subnormal( bSig, &bExp, &bSig ); | |
6048 | } | |
6049 | if ( aExp == 0 ) { | |
6050 | if ( aSig == 0 ) return packFloatx80( zSign, 0, 0 ); | |
6051 | normalizeFloatx80Subnormal( aSig, &aExp, &aSig ); | |
6052 | } | |
6053 | zExp = aExp - bExp + 0x3FFE; | |
6054 | rem1 = 0; | |
6055 | if ( bSig <= aSig ) { | |
6056 | shift128Right( aSig, 0, 1, &aSig, &rem1 ); | |
6057 | ++zExp; | |
6058 | } | |
6059 | zSig0 = estimateDiv128To64( aSig, rem1, bSig ); | |
6060 | mul64To128( bSig, zSig0, &term0, &term1 ); | |
6061 | sub128( aSig, rem1, term0, term1, &rem0, &rem1 ); | |
bb98fe42 | 6062 | while ( (int64_t) rem0 < 0 ) { |
158142c2 FB |
6063 | --zSig0; |
6064 | add128( rem0, rem1, 0, bSig, &rem0, &rem1 ); | |
6065 | } | |
6066 | zSig1 = estimateDiv128To64( rem1, 0, bSig ); | |
bb98fe42 | 6067 | if ( (uint64_t) ( zSig1<<1 ) <= 8 ) { |
158142c2 FB |
6068 | mul64To128( bSig, zSig1, &term1, &term2 ); |
6069 | sub128( rem1, 0, term1, term2, &rem1, &rem2 ); | |
bb98fe42 | 6070 | while ( (int64_t) rem1 < 0 ) { |
158142c2 FB |
6071 | --zSig1; |
6072 | add128( rem1, rem2, 0, bSig, &rem1, &rem2 ); | |
6073 | } | |
6074 | zSig1 |= ( ( rem1 | rem2 ) != 0 ); | |
6075 | } | |
a2f2d288 | 6076 | return roundAndPackFloatx80(status->floatx80_rounding_precision, |
ff32e16e | 6077 | zSign, zExp, zSig0, zSig1, status); |
158142c2 FB |
6078 | } |
6079 | ||
6080 | /*---------------------------------------------------------------------------- | |
6081 | | Returns the remainder of the extended double-precision floating-point value | |
6082 | | `a' with respect to the corresponding value `b'. The operation is performed | |
6b8b0136 JM |
6083 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic, |
6084 | | if 'mod' is false; if 'mod' is true, return the remainder based on truncating | |
445810ec JM |
6085 | | the quotient toward zero instead. '*quotient' is set to the low 64 bits of |
6086 | | the absolute value of the integer quotient. | |
158142c2 FB |
6087 | *----------------------------------------------------------------------------*/ |
6088 | ||
445810ec | 6089 | floatx80 floatx80_modrem(floatx80 a, floatx80 b, bool mod, uint64_t *quotient, |
6b8b0136 | 6090 | float_status *status) |
158142c2 | 6091 | { |
c120391c | 6092 | bool aSign, zSign; |
b662495d | 6093 | int32_t aExp, bExp, expDiff, aExpOrig; |
bb98fe42 AF |
6094 | uint64_t aSig0, aSig1, bSig; |
6095 | uint64_t q, term0, term1, alternateASig0, alternateASig1; | |
158142c2 | 6096 | |
445810ec | 6097 | *quotient = 0; |
d1eb8f2a AD |
6098 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
6099 | float_raise(float_flag_invalid, status); | |
6100 | return floatx80_default_nan(status); | |
6101 | } | |
158142c2 | 6102 | aSig0 = extractFloatx80Frac( a ); |
b662495d | 6103 | aExpOrig = aExp = extractFloatx80Exp( a ); |
158142c2 FB |
6104 | aSign = extractFloatx80Sign( a ); |
6105 | bSig = extractFloatx80Frac( b ); | |
6106 | bExp = extractFloatx80Exp( b ); | |
158142c2 | 6107 | if ( aExp == 0x7FFF ) { |
bb98fe42 AF |
6108 | if ( (uint64_t) ( aSig0<<1 ) |
6109 | || ( ( bExp == 0x7FFF ) && (uint64_t) ( bSig<<1 ) ) ) { | |
ff32e16e | 6110 | return propagateFloatx80NaN(a, b, status); |
158142c2 FB |
6111 | } |
6112 | goto invalid; | |
6113 | } | |
6114 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
6115 | if ((uint64_t)(bSig << 1)) { |
6116 | return propagateFloatx80NaN(a, b, status); | |
6117 | } | |
b662495d JM |
6118 | if (aExp == 0 && aSig0 >> 63) { |
6119 | /* | |
6120 | * Pseudo-denormal argument must be returned in normalized | |
6121 | * form. | |
6122 | */ | |
6123 | return packFloatx80(aSign, 1, aSig0); | |
6124 | } | |
158142c2 FB |
6125 | return a; |
6126 | } | |
6127 | if ( bExp == 0 ) { | |
6128 | if ( bSig == 0 ) { | |
6129 | invalid: | |
ff32e16e | 6130 | float_raise(float_flag_invalid, status); |
af39bc8c | 6131 | return floatx80_default_nan(status); |
158142c2 FB |
6132 | } |
6133 | normalizeFloatx80Subnormal( bSig, &bExp, &bSig ); | |
6134 | } | |
6135 | if ( aExp == 0 ) { | |
499a2f7b | 6136 | if ( aSig0 == 0 ) return a; |
158142c2 FB |
6137 | normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 ); |
6138 | } | |
158142c2 FB |
6139 | zSign = aSign; |
6140 | expDiff = aExp - bExp; | |
6141 | aSig1 = 0; | |
6142 | if ( expDiff < 0 ) { | |
b662495d JM |
6143 | if ( mod || expDiff < -1 ) { |
6144 | if (aExp == 1 && aExpOrig == 0) { | |
6145 | /* | |
6146 | * Pseudo-denormal argument must be returned in | |
6147 | * normalized form. | |
6148 | */ | |
6149 | return packFloatx80(aSign, aExp, aSig0); | |
6150 | } | |
6151 | return a; | |
6152 | } | |
158142c2 FB |
6153 | shift128Right( aSig0, 0, 1, &aSig0, &aSig1 ); |
6154 | expDiff = 0; | |
6155 | } | |
445810ec | 6156 | *quotient = q = ( bSig <= aSig0 ); |
158142c2 FB |
6157 | if ( q ) aSig0 -= bSig; |
6158 | expDiff -= 64; | |
6159 | while ( 0 < expDiff ) { | |
6160 | q = estimateDiv128To64( aSig0, aSig1, bSig ); | |
6161 | q = ( 2 < q ) ? q - 2 : 0; | |
6162 | mul64To128( bSig, q, &term0, &term1 ); | |
6163 | sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 ); | |
6164 | shortShift128Left( aSig0, aSig1, 62, &aSig0, &aSig1 ); | |
6165 | expDiff -= 62; | |
445810ec JM |
6166 | *quotient <<= 62; |
6167 | *quotient += q; | |
158142c2 FB |
6168 | } |
6169 | expDiff += 64; | |
6170 | if ( 0 < expDiff ) { | |
6171 | q = estimateDiv128To64( aSig0, aSig1, bSig ); | |
6172 | q = ( 2 < q ) ? q - 2 : 0; | |
6173 | q >>= 64 - expDiff; | |
6174 | mul64To128( bSig, q<<( 64 - expDiff ), &term0, &term1 ); | |
6175 | sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 ); | |
6176 | shortShift128Left( 0, bSig, 64 - expDiff, &term0, &term1 ); | |
6177 | while ( le128( term0, term1, aSig0, aSig1 ) ) { | |
6178 | ++q; | |
6179 | sub128( aSig0, aSig1, term0, term1, &aSig0, &aSig1 ); | |
6180 | } | |
445810ec JM |
6181 | if (expDiff < 64) { |
6182 | *quotient <<= expDiff; | |
6183 | } else { | |
6184 | *quotient = 0; | |
6185 | } | |
6186 | *quotient += q; | |
158142c2 FB |
6187 | } |
6188 | else { | |
6189 | term1 = 0; | |
6190 | term0 = bSig; | |
6191 | } | |
6b8b0136 JM |
6192 | if (!mod) { |
6193 | sub128( term0, term1, aSig0, aSig1, &alternateASig0, &alternateASig1 ); | |
6194 | if ( lt128( alternateASig0, alternateASig1, aSig0, aSig1 ) | |
6195 | || ( eq128( alternateASig0, alternateASig1, aSig0, aSig1 ) | |
6196 | && ( q & 1 ) ) | |
6197 | ) { | |
6198 | aSig0 = alternateASig0; | |
6199 | aSig1 = alternateASig1; | |
6200 | zSign = ! zSign; | |
445810ec | 6201 | ++*quotient; |
6b8b0136 | 6202 | } |
158142c2 FB |
6203 | } |
6204 | return | |
6205 | normalizeRoundAndPackFloatx80( | |
ff32e16e | 6206 | 80, zSign, bExp + expDiff, aSig0, aSig1, status); |
158142c2 FB |
6207 | |
6208 | } | |
6209 | ||
6b8b0136 JM |
6210 | /*---------------------------------------------------------------------------- |
6211 | | Returns the remainder of the extended double-precision floating-point value | |
6212 | | `a' with respect to the corresponding value `b'. The operation is performed | |
6213 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
6214 | *----------------------------------------------------------------------------*/ | |
6215 | ||
6216 | floatx80 floatx80_rem(floatx80 a, floatx80 b, float_status *status) | |
6217 | { | |
445810ec JM |
6218 | uint64_t quotient; |
6219 | return floatx80_modrem(a, b, false, "ient, status); | |
6b8b0136 JM |
6220 | } |
6221 | ||
6222 | /*---------------------------------------------------------------------------- | |
6223 | | Returns the remainder of the extended double-precision floating-point value | |
6224 | | `a' with respect to the corresponding value `b', with the quotient truncated | |
6225 | | toward zero. | |
6226 | *----------------------------------------------------------------------------*/ | |
6227 | ||
6228 | floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status) | |
6229 | { | |
445810ec JM |
6230 | uint64_t quotient; |
6231 | return floatx80_modrem(a, b, true, "ient, status); | |
6b8b0136 JM |
6232 | } |
6233 | ||
158142c2 FB |
6234 | /*---------------------------------------------------------------------------- |
6235 | | Returns the square root of the extended double-precision floating-point | |
6236 | | value `a'. The operation is performed according to the IEC/IEEE Standard | |
6237 | | for Binary Floating-Point Arithmetic. | |
6238 | *----------------------------------------------------------------------------*/ | |
6239 | ||
e5a41ffa | 6240 | floatx80 floatx80_sqrt(floatx80 a, float_status *status) |
158142c2 | 6241 | { |
c120391c | 6242 | bool aSign; |
f4014512 | 6243 | int32_t aExp, zExp; |
bb98fe42 AF |
6244 | uint64_t aSig0, aSig1, zSig0, zSig1, doubleZSig0; |
6245 | uint64_t rem0, rem1, rem2, rem3, term0, term1, term2, term3; | |
158142c2 | 6246 | |
d1eb8f2a AD |
6247 | if (floatx80_invalid_encoding(a)) { |
6248 | float_raise(float_flag_invalid, status); | |
6249 | return floatx80_default_nan(status); | |
6250 | } | |
158142c2 FB |
6251 | aSig0 = extractFloatx80Frac( a ); |
6252 | aExp = extractFloatx80Exp( a ); | |
6253 | aSign = extractFloatx80Sign( a ); | |
6254 | if ( aExp == 0x7FFF ) { | |
ff32e16e PM |
6255 | if ((uint64_t)(aSig0 << 1)) { |
6256 | return propagateFloatx80NaN(a, a, status); | |
6257 | } | |
158142c2 FB |
6258 | if ( ! aSign ) return a; |
6259 | goto invalid; | |
6260 | } | |
6261 | if ( aSign ) { | |
6262 | if ( ( aExp | aSig0 ) == 0 ) return a; | |
6263 | invalid: | |
ff32e16e | 6264 | float_raise(float_flag_invalid, status); |
af39bc8c | 6265 | return floatx80_default_nan(status); |
158142c2 FB |
6266 | } |
6267 | if ( aExp == 0 ) { | |
6268 | if ( aSig0 == 0 ) return packFloatx80( 0, 0, 0 ); | |
6269 | normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 ); | |
6270 | } | |
6271 | zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFF; | |
6272 | zSig0 = estimateSqrt32( aExp, aSig0>>32 ); | |
6273 | shift128Right( aSig0, 0, 2 + ( aExp & 1 ), &aSig0, &aSig1 ); | |
6274 | zSig0 = estimateDiv128To64( aSig0, aSig1, zSig0<<32 ) + ( zSig0<<30 ); | |
6275 | doubleZSig0 = zSig0<<1; | |
6276 | mul64To128( zSig0, zSig0, &term0, &term1 ); | |
6277 | sub128( aSig0, aSig1, term0, term1, &rem0, &rem1 ); | |
bb98fe42 | 6278 | while ( (int64_t) rem0 < 0 ) { |
158142c2 FB |
6279 | --zSig0; |
6280 | doubleZSig0 -= 2; | |
6281 | add128( rem0, rem1, zSig0>>63, doubleZSig0 | 1, &rem0, &rem1 ); | |
6282 | } | |
6283 | zSig1 = estimateDiv128To64( rem1, 0, doubleZSig0 ); | |
e9321124 | 6284 | if ( ( zSig1 & UINT64_C(0x3FFFFFFFFFFFFFFF) ) <= 5 ) { |
158142c2 FB |
6285 | if ( zSig1 == 0 ) zSig1 = 1; |
6286 | mul64To128( doubleZSig0, zSig1, &term1, &term2 ); | |
6287 | sub128( rem1, 0, term1, term2, &rem1, &rem2 ); | |
6288 | mul64To128( zSig1, zSig1, &term2, &term3 ); | |
6289 | sub192( rem1, rem2, 0, 0, term2, term3, &rem1, &rem2, &rem3 ); | |
bb98fe42 | 6290 | while ( (int64_t) rem1 < 0 ) { |
158142c2 FB |
6291 | --zSig1; |
6292 | shortShift128Left( 0, zSig1, 1, &term2, &term3 ); | |
6293 | term3 |= 1; | |
6294 | term2 |= doubleZSig0; | |
6295 | add192( rem1, rem2, rem3, 0, term2, term3, &rem1, &rem2, &rem3 ); | |
6296 | } | |
6297 | zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 ); | |
6298 | } | |
6299 | shortShift128Left( 0, zSig1, 1, &zSig0, &zSig1 ); | |
6300 | zSig0 |= doubleZSig0; | |
a2f2d288 PM |
6301 | return roundAndPackFloatx80(status->floatx80_rounding_precision, |
6302 | 0, zExp, zSig0, zSig1, status); | |
158142c2 FB |
6303 | } |
6304 | ||
158142c2 FB |
6305 | /*---------------------------------------------------------------------------- |
6306 | | Returns the result of converting the quadruple-precision floating-point | |
6307 | | value `a' to the extended double-precision floating-point format. The | |
6308 | | conversion is performed according to the IEC/IEEE Standard for Binary | |
6309 | | Floating-Point Arithmetic. | |
6310 | *----------------------------------------------------------------------------*/ | |
6311 | ||
e5a41ffa | 6312 | floatx80 float128_to_floatx80(float128 a, float_status *status) |
158142c2 | 6313 | { |
c120391c | 6314 | bool aSign; |
f4014512 | 6315 | int32_t aExp; |
bb98fe42 | 6316 | uint64_t aSig0, aSig1; |
158142c2 FB |
6317 | |
6318 | aSig1 = extractFloat128Frac1( a ); | |
6319 | aSig0 = extractFloat128Frac0( a ); | |
6320 | aExp = extractFloat128Exp( a ); | |
6321 | aSign = extractFloat128Sign( a ); | |
6322 | if ( aExp == 0x7FFF ) { | |
6323 | if ( aSig0 | aSig1 ) { | |
7537c2b4 JM |
6324 | floatx80 res = commonNaNToFloatx80(float128ToCommonNaN(a, status), |
6325 | status); | |
6326 | return floatx80_silence_nan(res, status); | |
158142c2 | 6327 | } |
0f605c88 LV |
6328 | return packFloatx80(aSign, floatx80_infinity_high, |
6329 | floatx80_infinity_low); | |
158142c2 FB |
6330 | } |
6331 | if ( aExp == 0 ) { | |
6332 | if ( ( aSig0 | aSig1 ) == 0 ) return packFloatx80( aSign, 0, 0 ); | |
6333 | normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 ); | |
6334 | } | |
6335 | else { | |
e9321124 | 6336 | aSig0 |= UINT64_C(0x0001000000000000); |
158142c2 FB |
6337 | } |
6338 | shortShift128Left( aSig0, aSig1, 15, &aSig0, &aSig1 ); | |
ff32e16e | 6339 | return roundAndPackFloatx80(80, aSign, aExp, aSig0, aSig1, status); |
158142c2 FB |
6340 | |
6341 | } | |
6342 | ||
158142c2 FB |
6343 | /*---------------------------------------------------------------------------- |
6344 | | Returns the remainder of the quadruple-precision floating-point value `a' | |
6345 | | with respect to the corresponding value `b'. The operation is performed | |
6346 | | according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. | |
6347 | *----------------------------------------------------------------------------*/ | |
6348 | ||
e5a41ffa | 6349 | float128 float128_rem(float128 a, float128 b, float_status *status) |
158142c2 | 6350 | { |
c120391c | 6351 | bool aSign, zSign; |
f4014512 | 6352 | int32_t aExp, bExp, expDiff; |
bb98fe42 AF |
6353 | uint64_t aSig0, aSig1, bSig0, bSig1, q, term0, term1, term2; |
6354 | uint64_t allZero, alternateASig0, alternateASig1, sigMean1; | |
6355 | int64_t sigMean0; | |
158142c2 FB |
6356 | |
6357 | aSig1 = extractFloat128Frac1( a ); | |
6358 | aSig0 = extractFloat128Frac0( a ); | |
6359 | aExp = extractFloat128Exp( a ); | |
6360 | aSign = extractFloat128Sign( a ); | |
6361 | bSig1 = extractFloat128Frac1( b ); | |
6362 | bSig0 = extractFloat128Frac0( b ); | |
6363 | bExp = extractFloat128Exp( b ); | |
158142c2 FB |
6364 | if ( aExp == 0x7FFF ) { |
6365 | if ( ( aSig0 | aSig1 ) | |
6366 | || ( ( bExp == 0x7FFF ) && ( bSig0 | bSig1 ) ) ) { | |
ff32e16e | 6367 | return propagateFloat128NaN(a, b, status); |
158142c2 FB |
6368 | } |
6369 | goto invalid; | |
6370 | } | |
6371 | if ( bExp == 0x7FFF ) { | |
ff32e16e PM |
6372 | if (bSig0 | bSig1) { |
6373 | return propagateFloat128NaN(a, b, status); | |
6374 | } | |
158142c2 FB |
6375 | return a; |
6376 | } | |
6377 | if ( bExp == 0 ) { | |
6378 | if ( ( bSig0 | bSig1 ) == 0 ) { | |
6379 | invalid: | |
ff32e16e | 6380 | float_raise(float_flag_invalid, status); |
af39bc8c | 6381 | return float128_default_nan(status); |
158142c2 FB |
6382 | } |
6383 | normalizeFloat128Subnormal( bSig0, bSig1, &bExp, &bSig0, &bSig1 ); | |
6384 | } | |
6385 | if ( aExp == 0 ) { | |
6386 | if ( ( aSig0 | aSig1 ) == 0 ) return a; | |
6387 | normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 ); | |
6388 | } | |
6389 | expDiff = aExp - bExp; | |
6390 | if ( expDiff < -1 ) return a; | |
6391 | shortShift128Left( | |
e9321124 | 6392 | aSig0 | UINT64_C(0x0001000000000000), |
158142c2 FB |
6393 | aSig1, |
6394 | 15 - ( expDiff < 0 ), | |
6395 | &aSig0, | |
6396 | &aSig1 | |
6397 | ); | |
6398 | shortShift128Left( | |
e9321124 | 6399 | bSig0 | UINT64_C(0x0001000000000000), bSig1, 15, &bSig0, &bSig1 ); |
158142c2 FB |
6400 | q = le128( bSig0, bSig1, aSig0, aSig1 ); |
6401 | if ( q ) sub128( aSig0, aSig1, bSig0, bSig1, &aSig0, &aSig1 ); | |
6402 | expDiff -= 64; | |
6403 | while ( 0 < expDiff ) { | |
6404 | q = estimateDiv128To64( aSig0, aSig1, bSig0 ); | |
6405 | q = ( 4 < q ) ? q - 4 : 0; | |
6406 | mul128By64To192( bSig0, bSig1, q, &term0, &term1, &term2 ); | |
6407 | shortShift192Left( term0, term1, term2, 61, &term1, &term2, &allZero ); | |
6408 | shortShift128Left( aSig0, aSig1, 61, &aSig0, &allZero ); | |
6409 | sub128( aSig0, 0, term1, term2, &aSig0, &aSig1 ); | |
6410 | expDiff -= 61; | |
6411 | } | |
6412 | if ( -64 < expDiff ) { | |
6413 | q = estimateDiv128To64( aSig0, aSig1, bSig0 ); | |
6414 | q = ( 4 < q ) ? q - 4 : 0; | |
6415 | q >>= - expDiff; | |
6416 | shift128Right( bSig0, bSig1, 12, &bSig0, &bSig1 ); | |
6417 | expDiff += 52; | |
6418 | if ( expDiff < 0 ) { | |
6419 | shift128Right( aSig0, aSig1, - expDiff, &aSig0, &aSig1 ); | |
6420 | } | |
6421 | else { | |
6422 | shortShift128Left( aSig0, aSig1, expDiff, &aSig0, &aSig1 ); | |
6423 | } | |
6424 | mul128By64To192( bSig0, bSig1, q, &term0, &term1, &term2 ); | |
6425 | sub128( aSig0, aSig1, term1, term2, &aSig0, &aSig1 ); | |
6426 | } | |
6427 | else { | |
6428 | shift128Right( aSig0, aSig1, 12, &aSig0, &aSig1 ); | |
6429 | shift128Right( bSig0, bSig1, 12, &bSig0, &bSig1 ); | |
6430 | } | |
6431 | do { | |
6432 | alternateASig0 = aSig0; | |
6433 | alternateASig1 = aSig1; | |
6434 | ++q; | |
6435 | sub128( aSig0, aSig1, bSig0, bSig1, &aSig0, &aSig1 ); | |
bb98fe42 | 6436 | } while ( 0 <= (int64_t) aSig0 ); |
158142c2 | 6437 | add128( |
bb98fe42 | 6438 | aSig0, aSig1, alternateASig0, alternateASig1, (uint64_t *)&sigMean0, &sigMean1 ); |
158142c2 FB |
6439 | if ( ( sigMean0 < 0 ) |
6440 | || ( ( ( sigMean0 | sigMean1 ) == 0 ) && ( q & 1 ) ) ) { | |
6441 | aSig0 = alternateASig0; | |
6442 | aSig1 = alternateASig1; | |
6443 | } | |
bb98fe42 | 6444 | zSign = ( (int64_t) aSig0 < 0 ); |
158142c2 | 6445 | if ( zSign ) sub128( 0, 0, aSig0, aSig1, &aSig0, &aSig1 ); |
ff32e16e PM |
6446 | return normalizeRoundAndPackFloat128(aSign ^ zSign, bExp - 4, aSig0, aSig1, |
6447 | status); | |
158142c2 FB |
6448 | } |
6449 | ||
71bfd65c RH |
6450 | static inline FloatRelation |
6451 | floatx80_compare_internal(floatx80 a, floatx80 b, bool is_quiet, | |
6452 | float_status *status) | |
f6714d36 | 6453 | { |
c120391c | 6454 | bool aSign, bSign; |
f6714d36 | 6455 | |
d1eb8f2a AD |
6456 | if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { |
6457 | float_raise(float_flag_invalid, status); | |
6458 | return float_relation_unordered; | |
6459 | } | |
f6714d36 AJ |
6460 | if (( ( extractFloatx80Exp( a ) == 0x7fff ) && |
6461 | ( extractFloatx80Frac( a )<<1 ) ) || | |
6462 | ( ( extractFloatx80Exp( b ) == 0x7fff ) && | |
6463 | ( extractFloatx80Frac( b )<<1 ) )) { | |
6464 | if (!is_quiet || | |
af39bc8c AM |
6465 | floatx80_is_signaling_nan(a, status) || |
6466 | floatx80_is_signaling_nan(b, status)) { | |
ff32e16e | 6467 | float_raise(float_flag_invalid, status); |
f6714d36 AJ |
6468 | } |
6469 | return float_relation_unordered; | |
6470 | } | |
6471 | aSign = extractFloatx80Sign( a ); | |
6472 | bSign = extractFloatx80Sign( b ); | |
6473 | if ( aSign != bSign ) { | |
6474 | ||
6475 | if ( ( ( (uint16_t) ( ( a.high | b.high ) << 1 ) ) == 0) && | |
6476 | ( ( a.low | b.low ) == 0 ) ) { | |
6477 | /* zero case */ | |
6478 | return float_relation_equal; | |
6479 | } else { | |
6480 | return 1 - (2 * aSign); | |
6481 | } | |
6482 | } else { | |
be53fa78 JM |
6483 | /* Normalize pseudo-denormals before comparison. */ |
6484 | if ((a.high & 0x7fff) == 0 && a.low & UINT64_C(0x8000000000000000)) { | |
6485 | ++a.high; | |
6486 | } | |
6487 | if ((b.high & 0x7fff) == 0 && b.low & UINT64_C(0x8000000000000000)) { | |
6488 | ++b.high; | |
6489 | } | |
f6714d36 AJ |
6490 | if (a.low == b.low && a.high == b.high) { |
6491 | return float_relation_equal; | |
6492 | } else { | |
6493 | return 1 - 2 * (aSign ^ ( lt128( a.high, a.low, b.high, b.low ) )); | |
6494 | } | |
6495 | } | |
6496 | } | |
6497 | ||
71bfd65c | 6498 | FloatRelation floatx80_compare(floatx80 a, floatx80 b, float_status *status) |
f6714d36 | 6499 | { |
ff32e16e | 6500 | return floatx80_compare_internal(a, b, 0, status); |
f6714d36 AJ |
6501 | } |
6502 | ||
71bfd65c RH |
6503 | FloatRelation floatx80_compare_quiet(floatx80 a, floatx80 b, |
6504 | float_status *status) | |
f6714d36 | 6505 | { |
ff32e16e | 6506 | return floatx80_compare_internal(a, b, 1, status); |
f6714d36 AJ |
6507 | } |
6508 | ||
e5a41ffa | 6509 | floatx80 floatx80_scalbn(floatx80 a, int n, float_status *status) |
9ee6e8bb | 6510 | { |
c120391c | 6511 | bool aSign; |
326b9e98 | 6512 | int32_t aExp; |
bb98fe42 | 6513 | uint64_t aSig; |
9ee6e8bb | 6514 | |
d1eb8f2a AD |
6515 | if (floatx80_invalid_encoding(a)) { |
6516 | float_raise(float_flag_invalid, status); | |
6517 | return floatx80_default_nan(status); | |
6518 | } | |
9ee6e8bb PB |
6519 | aSig = extractFloatx80Frac( a ); |
6520 | aExp = extractFloatx80Exp( a ); | |
6521 | aSign = extractFloatx80Sign( a ); | |
6522 | ||
326b9e98 AJ |
6523 | if ( aExp == 0x7FFF ) { |
6524 | if ( aSig<<1 ) { | |
ff32e16e | 6525 | return propagateFloatx80NaN(a, a, status); |
326b9e98 | 6526 | } |
9ee6e8bb PB |
6527 | return a; |
6528 | } | |
326b9e98 | 6529 | |
3c85c37f PM |
6530 | if (aExp == 0) { |
6531 | if (aSig == 0) { | |
6532 | return a; | |
6533 | } | |
6534 | aExp++; | |
6535 | } | |
69397542 | 6536 | |
326b9e98 AJ |
6537 | if (n > 0x10000) { |
6538 | n = 0x10000; | |
6539 | } else if (n < -0x10000) { | |
6540 | n = -0x10000; | |
6541 | } | |
6542 | ||
9ee6e8bb | 6543 | aExp += n; |
a2f2d288 PM |
6544 | return normalizeRoundAndPackFloatx80(status->floatx80_rounding_precision, |
6545 | aSign, aExp, aSig, 0, status); | |
9ee6e8bb | 6546 | } |
9ee6e8bb | 6547 | |
f6b3b108 EC |
6548 | static void __attribute__((constructor)) softfloat_init(void) |
6549 | { | |
6550 | union_float64 ua, ub, uc, ur; | |
6551 | ||
6552 | if (QEMU_NO_HARDFLOAT) { | |
6553 | return; | |
6554 | } | |
6555 | /* | |
6556 | * Test that the host's FMA is not obviously broken. For example, | |
6557 | * glibc < 2.23 can perform an incorrect FMA on certain hosts; see | |
6558 | * https://sourceware.org/bugzilla/show_bug.cgi?id=13304 | |
6559 | */ | |
6560 | ua.s = 0x0020000000000001ULL; | |
6561 | ub.s = 0x3ca0000000000000ULL; | |
6562 | uc.s = 0x0020000000000000ULL; | |
6563 | ur.h = fma(ua.h, ub.h, uc.h); | |
6564 | if (ur.s != 0x0020000000000001ULL) { | |
6565 | force_soft_fma = true; | |
6566 | } | |
6567 | } |