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Commit | Line | Data |
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158142c2 FB |
1 | /* Native implementation of soft float functions. Only a single status |
2 | context is supported */ | |
3 | #include "softfloat.h" | |
4 | #include <math.h> | |
5 | ||
6 | void set_float_rounding_mode(int val STATUS_PARAM) | |
7 | { | |
8 | STATUS(float_rounding_mode) = val; | |
9 | #if defined(_BSD) && !defined(__APPLE__) | |
10 | fpsetround(val); | |
11 | #elif defined(__arm__) | |
12 | /* nothing to do */ | |
13 | #else | |
14 | fesetround(val); | |
15 | #endif | |
16 | } | |
17 | ||
18 | #ifdef FLOATX80 | |
19 | void set_floatx80_rounding_precision(int val STATUS_PARAM) | |
20 | { | |
21 | STATUS(floatx80_rounding_precision) = val; | |
22 | } | |
23 | #endif | |
24 | ||
25 | #if defined(_BSD) | |
1b2b0af5 FB |
26 | #define lrint(d) ((long)rint(d)) |
27 | #define llrint(d) ((long long)rint(d)) | |
158142c2 FB |
28 | #endif |
29 | ||
30 | #if defined(__powerpc__) | |
31 | ||
32 | /* correct (but slow) PowerPC rint() (glibc version is incorrect) */ | |
33 | double qemu_rint(double x) | |
34 | { | |
35 | double y = 4503599627370496.0; | |
36 | if (fabs(x) >= y) | |
37 | return x; | |
38 | if (x < 0) | |
39 | y = -y; | |
40 | y = (x + y) - y; | |
41 | if (y == 0.0) | |
42 | y = copysign(y, x); | |
43 | return y; | |
44 | } | |
45 | ||
46 | #define rint qemu_rint | |
47 | #endif | |
48 | ||
49 | /*---------------------------------------------------------------------------- | |
50 | | Software IEC/IEEE integer-to-floating-point conversion routines. | |
51 | *----------------------------------------------------------------------------*/ | |
52 | float32 int32_to_float32(int v STATUS_PARAM) | |
53 | { | |
54 | return (float32)v; | |
55 | } | |
56 | ||
57 | float64 int32_to_float64(int v STATUS_PARAM) | |
58 | { | |
59 | return (float64)v; | |
60 | } | |
61 | ||
62 | #ifdef FLOATX80 | |
63 | floatx80 int32_to_floatx80(int v STATUS_PARAM) | |
64 | { | |
65 | return (floatx80)v; | |
66 | } | |
67 | #endif | |
68 | float32 int64_to_float32( int64_t v STATUS_PARAM) | |
69 | { | |
70 | return (float32)v; | |
71 | } | |
72 | float64 int64_to_float64( int64_t v STATUS_PARAM) | |
73 | { | |
74 | return (float64)v; | |
75 | } | |
76 | #ifdef FLOATX80 | |
77 | floatx80 int64_to_floatx80( int64_t v STATUS_PARAM) | |
78 | { | |
79 | return (floatx80)v; | |
80 | } | |
81 | #endif | |
82 | ||
1b2b0af5 FB |
83 | /* XXX: this code implements the x86 behaviour, not the IEEE one. */ |
84 | #if HOST_LONG_BITS == 32 | |
85 | static inline int long_to_int32(long a) | |
86 | { | |
87 | return a; | |
88 | } | |
89 | #else | |
90 | static inline int long_to_int32(long a) | |
91 | { | |
92 | if (a != (int32_t)a) | |
93 | a = 0x80000000; | |
94 | return a; | |
95 | } | |
96 | #endif | |
97 | ||
158142c2 FB |
98 | /*---------------------------------------------------------------------------- |
99 | | Software IEC/IEEE single-precision conversion routines. | |
100 | *----------------------------------------------------------------------------*/ | |
101 | int float32_to_int32( float32 a STATUS_PARAM) | |
102 | { | |
1b2b0af5 | 103 | return long_to_int32(lrintf(a)); |
158142c2 FB |
104 | } |
105 | int float32_to_int32_round_to_zero( float32 a STATUS_PARAM) | |
106 | { | |
107 | return (int)a; | |
108 | } | |
109 | int64_t float32_to_int64( float32 a STATUS_PARAM) | |
110 | { | |
111 | return llrintf(a); | |
112 | } | |
113 | ||
114 | int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM) | |
115 | { | |
116 | return (int64_t)a; | |
117 | } | |
118 | ||
119 | float64 float32_to_float64( float32 a STATUS_PARAM) | |
120 | { | |
121 | return a; | |
122 | } | |
123 | #ifdef FLOATX80 | |
124 | floatx80 float32_to_floatx80( float32 a STATUS_PARAM) | |
125 | { | |
126 | return a; | |
127 | } | |
128 | #endif | |
129 | ||
130 | /*---------------------------------------------------------------------------- | |
131 | | Software IEC/IEEE single-precision operations. | |
132 | *----------------------------------------------------------------------------*/ | |
133 | float32 float32_round_to_int( float32 a STATUS_PARAM) | |
134 | { | |
135 | return rintf(a); | |
136 | } | |
137 | ||
b109f9f8 FB |
138 | float32 float32_rem( float32 a, float32 b STATUS_PARAM) |
139 | { | |
140 | return remainderf(a, b); | |
141 | } | |
142 | ||
158142c2 FB |
143 | float32 float32_sqrt( float32 a STATUS_PARAM) |
144 | { | |
145 | return sqrtf(a); | |
146 | } | |
b109f9f8 FB |
147 | char float32_compare( float32 a, float32 b STATUS_PARAM ) |
148 | { | |
149 | if (a < b) { | |
150 | return -1; | |
151 | } else if (a == b) { | |
152 | return 0; | |
153 | } else if (a > b) { | |
154 | return 1; | |
155 | } else { | |
156 | return 2; | |
157 | } | |
158 | } | |
159 | char float32_compare_quiet( float32 a, float32 b STATUS_PARAM ) | |
160 | { | |
161 | if (isless(a, b)) { | |
162 | return -1; | |
163 | } else if (a == b) { | |
164 | return 0; | |
165 | } else if (isgreater(a, b)) { | |
166 | return 1; | |
167 | } else { | |
168 | return 2; | |
169 | } | |
170 | } | |
158142c2 FB |
171 | char float32_is_signaling_nan( float32 a1) |
172 | { | |
173 | float32u u; | |
174 | uint32_t a; | |
175 | u.f = a1; | |
176 | a = u.i; | |
177 | return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF ); | |
178 | } | |
179 | ||
180 | /*---------------------------------------------------------------------------- | |
181 | | Software IEC/IEEE double-precision conversion routines. | |
182 | *----------------------------------------------------------------------------*/ | |
183 | int float64_to_int32( float64 a STATUS_PARAM) | |
184 | { | |
1b2b0af5 | 185 | return long_to_int32(lrint(a)); |
158142c2 FB |
186 | } |
187 | int float64_to_int32_round_to_zero( float64 a STATUS_PARAM) | |
188 | { | |
189 | return (int)a; | |
190 | } | |
191 | int64_t float64_to_int64( float64 a STATUS_PARAM) | |
192 | { | |
193 | return llrint(a); | |
194 | } | |
195 | int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM) | |
196 | { | |
197 | return (int64_t)a; | |
198 | } | |
199 | float32 float64_to_float32( float64 a STATUS_PARAM) | |
200 | { | |
201 | return a; | |
202 | } | |
203 | #ifdef FLOATX80 | |
204 | floatx80 float64_to_floatx80( float64 a STATUS_PARAM) | |
205 | { | |
206 | return a; | |
207 | } | |
208 | #endif | |
209 | #ifdef FLOAT128 | |
210 | float128 float64_to_float128( float64 a STATUS_PARAM) | |
211 | { | |
212 | return a; | |
213 | } | |
214 | #endif | |
215 | ||
216 | /*---------------------------------------------------------------------------- | |
217 | | Software IEC/IEEE double-precision operations. | |
218 | *----------------------------------------------------------------------------*/ | |
219 | float64 float64_round_to_int( float64 a STATUS_PARAM ) | |
220 | { | |
221 | #if defined(__arm__) | |
222 | switch(STATUS(float_rounding_mode)) { | |
223 | default: | |
224 | case float_round_nearest_even: | |
225 | asm("rndd %0, %1" : "=f" (a) : "f"(a)); | |
226 | break; | |
227 | case float_round_down: | |
228 | asm("rnddm %0, %1" : "=f" (a) : "f"(a)); | |
229 | break; | |
230 | case float_round_up: | |
231 | asm("rnddp %0, %1" : "=f" (a) : "f"(a)); | |
232 | break; | |
233 | case float_round_to_zero: | |
234 | asm("rnddz %0, %1" : "=f" (a) : "f"(a)); | |
235 | break; | |
236 | } | |
237 | #else | |
238 | return rint(a); | |
239 | #endif | |
240 | } | |
241 | ||
b109f9f8 FB |
242 | float64 float64_rem( float64 a, float64 b STATUS_PARAM) |
243 | { | |
244 | return remainder(a, b); | |
245 | } | |
246 | ||
158142c2 FB |
247 | float64 float64_sqrt( float64 a STATUS_PARAM) |
248 | { | |
249 | return sqrt(a); | |
250 | } | |
b109f9f8 FB |
251 | char float64_compare( float64 a, float64 b STATUS_PARAM ) |
252 | { | |
253 | if (a < b) { | |
254 | return -1; | |
255 | } else if (a == b) { | |
256 | return 0; | |
257 | } else if (a > b) { | |
258 | return 1; | |
259 | } else { | |
260 | return 2; | |
261 | } | |
262 | } | |
263 | char float64_compare_quiet( float64 a, float64 b STATUS_PARAM ) | |
264 | { | |
265 | if (isless(a, b)) { | |
266 | return -1; | |
267 | } else if (a == b) { | |
268 | return 0; | |
269 | } else if (isgreater(a, b)) { | |
270 | return 1; | |
271 | } else { | |
272 | return 2; | |
273 | } | |
274 | } | |
158142c2 FB |
275 | char float64_is_signaling_nan( float64 a1) |
276 | { | |
277 | float64u u; | |
278 | uint64_t a; | |
279 | u.f = a1; | |
280 | a = u.i; | |
281 | return | |
282 | ( ( ( a>>51 ) & 0xFFF ) == 0xFFE ) | |
283 | && ( a & LIT64( 0x0007FFFFFFFFFFFF ) ); | |
284 | ||
285 | } | |
286 | ||
287 | #ifdef FLOATX80 | |
288 | ||
289 | /*---------------------------------------------------------------------------- | |
290 | | Software IEC/IEEE extended double-precision conversion routines. | |
291 | *----------------------------------------------------------------------------*/ | |
292 | int floatx80_to_int32( floatx80 a STATUS_PARAM) | |
293 | { | |
1b2b0af5 | 294 | return long_to_int32(lrintl(a)); |
158142c2 FB |
295 | } |
296 | int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM) | |
297 | { | |
298 | return (int)a; | |
299 | } | |
300 | int64_t floatx80_to_int64( floatx80 a STATUS_PARAM) | |
301 | { | |
302 | return llrintl(a); | |
303 | } | |
304 | int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM) | |
305 | { | |
306 | return (int64_t)a; | |
307 | } | |
308 | float32 floatx80_to_float32( floatx80 a STATUS_PARAM) | |
309 | { | |
310 | return a; | |
311 | } | |
312 | float64 floatx80_to_float64( floatx80 a STATUS_PARAM) | |
313 | { | |
314 | return a; | |
315 | } | |
316 | ||
317 | /*---------------------------------------------------------------------------- | |
318 | | Software IEC/IEEE extended double-precision operations. | |
319 | *----------------------------------------------------------------------------*/ | |
320 | floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM) | |
321 | { | |
322 | return rintl(a); | |
323 | } | |
b109f9f8 FB |
324 | floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM) |
325 | { | |
326 | return remainderl(a, b); | |
327 | } | |
158142c2 FB |
328 | floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM) |
329 | { | |
330 | return sqrtl(a); | |
331 | } | |
b109f9f8 FB |
332 | char floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM ) |
333 | { | |
334 | if (a < b) { | |
335 | return -1; | |
336 | } else if (a == b) { | |
337 | return 0; | |
338 | } else if (a > b) { | |
339 | return 1; | |
340 | } else { | |
341 | return 2; | |
342 | } | |
343 | } | |
344 | char floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM ) | |
345 | { | |
346 | if (isless(a, b)) { | |
347 | return -1; | |
348 | } else if (a == b) { | |
349 | return 0; | |
350 | } else if (isgreater(a, b)) { | |
351 | return 1; | |
352 | } else { | |
353 | return 2; | |
354 | } | |
355 | } | |
158142c2 FB |
356 | char floatx80_is_signaling_nan( floatx80 a1) |
357 | { | |
358 | floatx80u u; | |
359 | u.f = a1; | |
360 | return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 ); | |
361 | } | |
362 | ||
363 | #endif |