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b00dc837 | 1 | /* |
1da177e4 LT |
2 | * arch/sparc64/math-emu/math.c |
3 | * | |
4 | * Copyright (C) 1997,1999 Jakub Jelinek (jj@ultra.linux.cz) | |
5 | * Copyright (C) 1999 David S. Miller (davem@redhat.com) | |
6 | * | |
7 | * Emulation routines originate from soft-fp package, which is part | |
8 | * of glibc and has appropriate copyrights in it. | |
9 | */ | |
10 | ||
11 | #include <linux/types.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/errno.h> | |
121dd5f2 | 14 | #include <linux/perf_event.h> |
1da177e4 LT |
15 | |
16 | #include <asm/fpumacro.h> | |
17 | #include <asm/ptrace.h> | |
18 | #include <asm/uaccess.h> | |
d550bbd4 | 19 | #include <asm/cacheflush.h> |
1da177e4 | 20 | |
5115f39c | 21 | #include "sfp-util_64.h" |
1da177e4 LT |
22 | #include <math-emu/soft-fp.h> |
23 | #include <math-emu/single.h> | |
24 | #include <math-emu/double.h> | |
25 | #include <math-emu/quad.h> | |
26 | ||
27 | /* QUAD - ftt == 3 */ | |
28 | #define FMOVQ 0x003 | |
29 | #define FNEGQ 0x007 | |
30 | #define FABSQ 0x00b | |
31 | #define FSQRTQ 0x02b | |
32 | #define FADDQ 0x043 | |
33 | #define FSUBQ 0x047 | |
34 | #define FMULQ 0x04b | |
35 | #define FDIVQ 0x04f | |
36 | #define FDMULQ 0x06e | |
37 | #define FQTOX 0x083 | |
38 | #define FXTOQ 0x08c | |
39 | #define FQTOS 0x0c7 | |
40 | #define FQTOD 0x0cb | |
41 | #define FITOQ 0x0cc | |
42 | #define FSTOQ 0x0cd | |
43 | #define FDTOQ 0x0ce | |
44 | #define FQTOI 0x0d3 | |
45 | /* SUBNORMAL - ftt == 2 */ | |
46 | #define FSQRTS 0x029 | |
47 | #define FSQRTD 0x02a | |
48 | #define FADDS 0x041 | |
49 | #define FADDD 0x042 | |
50 | #define FSUBS 0x045 | |
51 | #define FSUBD 0x046 | |
52 | #define FMULS 0x049 | |
53 | #define FMULD 0x04a | |
54 | #define FDIVS 0x04d | |
55 | #define FDIVD 0x04e | |
56 | #define FSMULD 0x069 | |
57 | #define FSTOX 0x081 | |
58 | #define FDTOX 0x082 | |
59 | #define FDTOS 0x0c6 | |
60 | #define FSTOD 0x0c9 | |
61 | #define FSTOI 0x0d1 | |
62 | #define FDTOI 0x0d2 | |
63 | #define FXTOS 0x084 /* Only Ultra-III generates this. */ | |
64 | #define FXTOD 0x088 /* Only Ultra-III generates this. */ | |
65 | #if 0 /* Optimized inline in sparc64/kernel/entry.S */ | |
66 | #define FITOS 0x0c4 /* Only Ultra-III generates this. */ | |
67 | #endif | |
68 | #define FITOD 0x0c8 /* Only Ultra-III generates this. */ | |
69 | /* FPOP2 */ | |
70 | #define FCMPQ 0x053 | |
71 | #define FCMPEQ 0x057 | |
72 | #define FMOVQ0 0x003 | |
73 | #define FMOVQ1 0x043 | |
74 | #define FMOVQ2 0x083 | |
75 | #define FMOVQ3 0x0c3 | |
76 | #define FMOVQI 0x103 | |
77 | #define FMOVQX 0x183 | |
78 | #define FMOVQZ 0x027 | |
79 | #define FMOVQLE 0x047 | |
80 | #define FMOVQLZ 0x067 | |
81 | #define FMOVQNZ 0x0a7 | |
82 | #define FMOVQGZ 0x0c7 | |
83 | #define FMOVQGE 0x0e7 | |
84 | ||
85 | #define FSR_TEM_SHIFT 23UL | |
86 | #define FSR_TEM_MASK (0x1fUL << FSR_TEM_SHIFT) | |
87 | #define FSR_AEXC_SHIFT 5UL | |
88 | #define FSR_AEXC_MASK (0x1fUL << FSR_AEXC_SHIFT) | |
89 | #define FSR_CEXC_SHIFT 0UL | |
90 | #define FSR_CEXC_MASK (0x1fUL << FSR_CEXC_SHIFT) | |
91 | ||
92 | /* All routines returning an exception to raise should detect | |
93 | * such exceptions _before_ rounding to be consistent with | |
94 | * the behavior of the hardware in the implemented cases | |
95 | * (and thus with the recommendations in the V9 architecture | |
96 | * manual). | |
97 | * | |
98 | * We return 0 if a SIGFPE should be sent, 1 otherwise. | |
99 | */ | |
100 | static inline int record_exception(struct pt_regs *regs, int eflag) | |
101 | { | |
102 | u64 fsr = current_thread_info()->xfsr[0]; | |
103 | int would_trap; | |
104 | ||
105 | /* Determine if this exception would have generated a trap. */ | |
106 | would_trap = (fsr & ((long)eflag << FSR_TEM_SHIFT)) != 0UL; | |
107 | ||
108 | /* If trapping, we only want to signal one bit. */ | |
109 | if(would_trap != 0) { | |
110 | eflag &= ((fsr & FSR_TEM_MASK) >> FSR_TEM_SHIFT); | |
111 | if((eflag & (eflag - 1)) != 0) { | |
112 | if(eflag & FP_EX_INVALID) | |
113 | eflag = FP_EX_INVALID; | |
114 | else if(eflag & FP_EX_OVERFLOW) | |
115 | eflag = FP_EX_OVERFLOW; | |
116 | else if(eflag & FP_EX_UNDERFLOW) | |
117 | eflag = FP_EX_UNDERFLOW; | |
118 | else if(eflag & FP_EX_DIVZERO) | |
119 | eflag = FP_EX_DIVZERO; | |
120 | else if(eflag & FP_EX_INEXACT) | |
121 | eflag = FP_EX_INEXACT; | |
122 | } | |
123 | } | |
124 | ||
125 | /* Set CEXC, here is the rule: | |
126 | * | |
127 | * In general all FPU ops will set one and only one | |
128 | * bit in the CEXC field, this is always the case | |
129 | * when the IEEE exception trap is enabled in TEM. | |
130 | */ | |
131 | fsr &= ~(FSR_CEXC_MASK); | |
132 | fsr |= ((long)eflag << FSR_CEXC_SHIFT); | |
133 | ||
134 | /* Set the AEXC field, rule is: | |
135 | * | |
136 | * If a trap would not be generated, the | |
137 | * CEXC just generated is OR'd into the | |
138 | * existing value of AEXC. | |
139 | */ | |
140 | if(would_trap == 0) | |
141 | fsr |= ((long)eflag << FSR_AEXC_SHIFT); | |
142 | ||
143 | /* If trapping, indicate fault trap type IEEE. */ | |
144 | if(would_trap != 0) | |
145 | fsr |= (1UL << 14); | |
146 | ||
147 | current_thread_info()->xfsr[0] = fsr; | |
148 | ||
149 | /* If we will not trap, advance the program counter over | |
150 | * the instruction being handled. | |
151 | */ | |
152 | if(would_trap == 0) { | |
153 | regs->tpc = regs->tnpc; | |
154 | regs->tnpc += 4; | |
155 | } | |
156 | ||
157 | return (would_trap ? 0 : 1); | |
158 | } | |
159 | ||
160 | typedef union { | |
161 | u32 s; | |
162 | u64 d; | |
163 | u64 q[2]; | |
164 | } *argp; | |
165 | ||
456d3d42 | 166 | int do_mathemu(struct pt_regs *regs, struct fpustate *f, bool illegal_insn_trap) |
1da177e4 LT |
167 | { |
168 | unsigned long pc = regs->tpc; | |
169 | unsigned long tstate = regs->tstate; | |
170 | u32 insn = 0; | |
171 | int type = 0; | |
172 | /* ftt tells which ftt it may happen in, r is rd, b is rs2 and a is rs1. The *u arg tells | |
173 | whether the argument should be packed/unpacked (0 - do not unpack/pack, 1 - unpack/pack) | |
174 | non-u args tells the size of the argument (0 - no argument, 1 - single, 2 - double, 3 - quad */ | |
175 | #define TYPE(ftt, r, ru, b, bu, a, au) type = (au << 2) | (a << 0) | (bu << 5) | (b << 3) | (ru << 8) | (r << 6) | (ftt << 9) | |
176 | int freg; | |
177 | static u64 zero[2] = { 0L, 0L }; | |
178 | int flags; | |
179 | FP_DECL_EX; | |
180 | FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR); | |
181 | FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR); | |
182 | FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR); | |
183 | int IR; | |
184 | long XR, xfsr; | |
185 | ||
186 | if (tstate & TSTATE_PRIV) | |
187 | die_if_kernel("unfinished/unimplemented FPop from kernel", regs); | |
a8b0ca17 | 188 | perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0); |
1da177e4 LT |
189 | if (test_thread_flag(TIF_32BIT)) |
190 | pc = (u32)pc; | |
191 | if (get_user(insn, (u32 __user *) pc) != -EFAULT) { | |
192 | if ((insn & 0xc1f80000) == 0x81a00000) /* FPOP1 */ { | |
193 | switch ((insn >> 5) & 0x1ff) { | |
194 | /* QUAD - ftt == 3 */ | |
195 | case FMOVQ: | |
196 | case FNEGQ: | |
197 | case FABSQ: TYPE(3,3,0,3,0,0,0); break; | |
198 | case FSQRTQ: TYPE(3,3,1,3,1,0,0); break; | |
199 | case FADDQ: | |
200 | case FSUBQ: | |
201 | case FMULQ: | |
202 | case FDIVQ: TYPE(3,3,1,3,1,3,1); break; | |
203 | case FDMULQ: TYPE(3,3,1,2,1,2,1); break; | |
204 | case FQTOX: TYPE(3,2,0,3,1,0,0); break; | |
205 | case FXTOQ: TYPE(3,3,1,2,0,0,0); break; | |
206 | case FQTOS: TYPE(3,1,1,3,1,0,0); break; | |
207 | case FQTOD: TYPE(3,2,1,3,1,0,0); break; | |
208 | case FITOQ: TYPE(3,3,1,1,0,0,0); break; | |
209 | case FSTOQ: TYPE(3,3,1,1,1,0,0); break; | |
210 | case FDTOQ: TYPE(3,3,1,2,1,0,0); break; | |
211 | case FQTOI: TYPE(3,1,0,3,1,0,0); break; | |
4e74ae80 DM |
212 | |
213 | /* We can get either unimplemented or unfinished | |
214 | * for these cases. Pre-Niagara systems generate | |
215 | * unfinished fpop for SUBNORMAL cases, and Niagara | |
216 | * always gives unimplemented fpop for fsqrt{s,d}. | |
217 | */ | |
218 | case FSQRTS: { | |
219 | unsigned long x = current_thread_info()->xfsr[0]; | |
220 | ||
456d3d42 | 221 | x = (x >> 14) & 0x7; |
4e74ae80 | 222 | TYPE(x,1,1,1,1,0,0); |
4e74ae80 DM |
223 | break; |
224 | } | |
225 | ||
226 | case FSQRTD: { | |
227 | unsigned long x = current_thread_info()->xfsr[0]; | |
228 | ||
456d3d42 | 229 | x = (x >> 14) & 0x7; |
4e74ae80 DM |
230 | TYPE(x,2,1,2,1,0,0); |
231 | break; | |
232 | } | |
233 | ||
1da177e4 | 234 | /* SUBNORMAL - ftt == 2 */ |
1da177e4 LT |
235 | case FADDD: |
236 | case FSUBD: | |
237 | case FMULD: | |
238 | case FDIVD: TYPE(2,2,1,2,1,2,1); break; | |
239 | case FADDS: | |
240 | case FSUBS: | |
241 | case FMULS: | |
242 | case FDIVS: TYPE(2,1,1,1,1,1,1); break; | |
243 | case FSMULD: TYPE(2,2,1,1,1,1,1); break; | |
244 | case FSTOX: TYPE(2,2,0,1,1,0,0); break; | |
245 | case FDTOX: TYPE(2,2,0,2,1,0,0); break; | |
246 | case FDTOS: TYPE(2,1,1,2,1,0,0); break; | |
247 | case FSTOD: TYPE(2,2,1,1,1,0,0); break; | |
248 | case FSTOI: TYPE(2,1,0,1,1,0,0); break; | |
249 | case FDTOI: TYPE(2,1,0,2,1,0,0); break; | |
250 | ||
251 | /* Only Ultra-III generates these */ | |
252 | case FXTOS: TYPE(2,1,1,2,0,0,0); break; | |
253 | case FXTOD: TYPE(2,2,1,2,0,0,0); break; | |
254 | #if 0 /* Optimized inline in sparc64/kernel/entry.S */ | |
255 | case FITOS: TYPE(2,1,1,1,0,0,0); break; | |
256 | #endif | |
257 | case FITOD: TYPE(2,2,1,1,0,0,0); break; | |
258 | } | |
259 | } | |
260 | else if ((insn & 0xc1f80000) == 0x81a80000) /* FPOP2 */ { | |
261 | IR = 2; | |
262 | switch ((insn >> 5) & 0x1ff) { | |
263 | case FCMPQ: TYPE(3,0,0,3,1,3,1); break; | |
264 | case FCMPEQ: TYPE(3,0,0,3,1,3,1); break; | |
265 | /* Now the conditional fmovq support */ | |
266 | case FMOVQ0: | |
267 | case FMOVQ1: | |
268 | case FMOVQ2: | |
269 | case FMOVQ3: | |
270 | /* fmovq %fccX, %fY, %fZ */ | |
271 | if (!((insn >> 11) & 3)) | |
272 | XR = current_thread_info()->xfsr[0] >> 10; | |
273 | else | |
274 | XR = current_thread_info()->xfsr[0] >> (30 + ((insn >> 10) & 0x6)); | |
275 | XR &= 3; | |
276 | IR = 0; | |
277 | switch ((insn >> 14) & 0x7) { | |
278 | /* case 0: IR = 0; break; */ /* Never */ | |
279 | case 1: if (XR) IR = 1; break; /* Not Equal */ | |
280 | case 2: if (XR == 1 || XR == 2) IR = 1; break; /* Less or Greater */ | |
281 | case 3: if (XR & 1) IR = 1; break; /* Unordered or Less */ | |
282 | case 4: if (XR == 1) IR = 1; break; /* Less */ | |
283 | case 5: if (XR & 2) IR = 1; break; /* Unordered or Greater */ | |
284 | case 6: if (XR == 2) IR = 1; break; /* Greater */ | |
285 | case 7: if (XR == 3) IR = 1; break; /* Unordered */ | |
286 | } | |
287 | if ((insn >> 14) & 8) | |
288 | IR ^= 1; | |
289 | break; | |
290 | case FMOVQI: | |
291 | case FMOVQX: | |
292 | /* fmovq %[ix]cc, %fY, %fZ */ | |
293 | XR = regs->tstate >> 32; | |
294 | if ((insn >> 5) & 0x80) | |
295 | XR >>= 4; | |
296 | XR &= 0xf; | |
297 | IR = 0; | |
298 | freg = ((XR >> 2) ^ XR) & 2; | |
299 | switch ((insn >> 14) & 0x7) { | |
300 | /* case 0: IR = 0; break; */ /* Never */ | |
301 | case 1: if (XR & 4) IR = 1; break; /* Equal */ | |
302 | case 2: if ((XR & 4) || freg) IR = 1; break; /* Less or Equal */ | |
303 | case 3: if (freg) IR = 1; break; /* Less */ | |
304 | case 4: if (XR & 5) IR = 1; break; /* Less or Equal Unsigned */ | |
305 | case 5: if (XR & 1) IR = 1; break; /* Carry Set */ | |
306 | case 6: if (XR & 8) IR = 1; break; /* Negative */ | |
307 | case 7: if (XR & 2) IR = 1; break; /* Overflow Set */ | |
308 | } | |
309 | if ((insn >> 14) & 8) | |
310 | IR ^= 1; | |
311 | break; | |
312 | case FMOVQZ: | |
313 | case FMOVQLE: | |
314 | case FMOVQLZ: | |
315 | case FMOVQNZ: | |
316 | case FMOVQGZ: | |
317 | case FMOVQGE: | |
318 | freg = (insn >> 14) & 0x1f; | |
319 | if (!freg) | |
320 | XR = 0; | |
321 | else if (freg < 16) | |
322 | XR = regs->u_regs[freg]; | |
517ffce4 | 323 | else if (!test_thread_64bit_stack(regs->u_regs[UREG_FP])) { |
1da177e4 LT |
324 | struct reg_window32 __user *win32; |
325 | flushw_user (); | |
326 | win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP])); | |
327 | get_user(XR, &win32->locals[freg - 16]); | |
328 | } else { | |
329 | struct reg_window __user *win; | |
330 | flushw_user (); | |
331 | win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS); | |
332 | get_user(XR, &win->locals[freg - 16]); | |
333 | } | |
334 | IR = 0; | |
335 | switch ((insn >> 10) & 3) { | |
336 | case 1: if (!XR) IR = 1; break; /* Register Zero */ | |
337 | case 2: if (XR <= 0) IR = 1; break; /* Register Less Than or Equal to Zero */ | |
338 | case 3: if (XR < 0) IR = 1; break; /* Register Less Than Zero */ | |
339 | } | |
340 | if ((insn >> 10) & 4) | |
341 | IR ^= 1; | |
342 | break; | |
343 | } | |
344 | if (IR == 0) { | |
345 | /* The fmov test was false. Do a nop instead */ | |
346 | current_thread_info()->xfsr[0] &= ~(FSR_CEXC_MASK); | |
347 | regs->tpc = regs->tnpc; | |
348 | regs->tnpc += 4; | |
349 | return 1; | |
350 | } else if (IR == 1) { | |
351 | /* Change the instruction into plain fmovq */ | |
352 | insn = (insn & 0x3e00001f) | 0x81a00060; | |
353 | TYPE(3,3,0,3,0,0,0); | |
354 | } | |
355 | } | |
356 | } | |
357 | if (type) { | |
358 | argp rs1 = NULL, rs2 = NULL, rd = NULL; | |
359 | ||
456d3d42 DM |
360 | /* Starting with UltraSPARC-T2, the cpu does not set the FP Trap |
361 | * Type field in the %fsr to unimplemented_FPop. Nor does it | |
362 | * use the fp_exception_other trap. Instead it signals an | |
363 | * illegal instruction and leaves the FP trap type field of | |
364 | * the %fsr unchanged. | |
365 | */ | |
366 | if (!illegal_insn_trap) { | |
367 | int ftt = (current_thread_info()->xfsr[0] >> 14) & 0x7; | |
368 | if (ftt != (type >> 9)) | |
369 | goto err; | |
370 | } | |
1da177e4 LT |
371 | current_thread_info()->xfsr[0] &= ~0x1c000; |
372 | freg = ((insn >> 14) & 0x1f); | |
373 | switch (type & 0x3) { | |
374 | case 3: if (freg & 2) { | |
375 | current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */; | |
376 | goto err; | |
377 | } | |
378 | case 2: freg = ((freg & 1) << 5) | (freg & 0x1e); | |
379 | case 1: rs1 = (argp)&f->regs[freg]; | |
380 | flags = (freg < 32) ? FPRS_DL : FPRS_DU; | |
381 | if (!(current_thread_info()->fpsaved[0] & flags)) | |
382 | rs1 = (argp)&zero; | |
383 | break; | |
384 | } | |
385 | switch (type & 0x7) { | |
386 | case 7: FP_UNPACK_QP (QA, rs1); break; | |
387 | case 6: FP_UNPACK_DP (DA, rs1); break; | |
388 | case 5: FP_UNPACK_SP (SA, rs1); break; | |
389 | } | |
390 | freg = (insn & 0x1f); | |
391 | switch ((type >> 3) & 0x3) { | |
392 | case 3: if (freg & 2) { | |
393 | current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */; | |
394 | goto err; | |
395 | } | |
396 | case 2: freg = ((freg & 1) << 5) | (freg & 0x1e); | |
397 | case 1: rs2 = (argp)&f->regs[freg]; | |
398 | flags = (freg < 32) ? FPRS_DL : FPRS_DU; | |
399 | if (!(current_thread_info()->fpsaved[0] & flags)) | |
400 | rs2 = (argp)&zero; | |
401 | break; | |
402 | } | |
403 | switch ((type >> 3) & 0x7) { | |
404 | case 7: FP_UNPACK_QP (QB, rs2); break; | |
405 | case 6: FP_UNPACK_DP (DB, rs2); break; | |
406 | case 5: FP_UNPACK_SP (SB, rs2); break; | |
407 | } | |
408 | freg = ((insn >> 25) & 0x1f); | |
409 | switch ((type >> 6) & 0x3) { | |
410 | case 3: if (freg & 2) { | |
411 | current_thread_info()->xfsr[0] |= (6 << 14) /* invalid_fp_register */; | |
412 | goto err; | |
413 | } | |
414 | case 2: freg = ((freg & 1) << 5) | (freg & 0x1e); | |
415 | case 1: rd = (argp)&f->regs[freg]; | |
416 | flags = (freg < 32) ? FPRS_DL : FPRS_DU; | |
417 | if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) { | |
418 | current_thread_info()->fpsaved[0] = FPRS_FEF; | |
419 | current_thread_info()->gsr[0] = 0; | |
420 | } | |
421 | if (!(current_thread_info()->fpsaved[0] & flags)) { | |
422 | if (freg < 32) | |
423 | memset(f->regs, 0, 32*sizeof(u32)); | |
424 | else | |
425 | memset(f->regs+32, 0, 32*sizeof(u32)); | |
426 | } | |
427 | current_thread_info()->fpsaved[0] |= flags; | |
428 | break; | |
429 | } | |
430 | switch ((insn >> 5) & 0x1ff) { | |
431 | /* + */ | |
432 | case FADDS: FP_ADD_S (SR, SA, SB); break; | |
433 | case FADDD: FP_ADD_D (DR, DA, DB); break; | |
434 | case FADDQ: FP_ADD_Q (QR, QA, QB); break; | |
435 | /* - */ | |
436 | case FSUBS: FP_SUB_S (SR, SA, SB); break; | |
437 | case FSUBD: FP_SUB_D (DR, DA, DB); break; | |
438 | case FSUBQ: FP_SUB_Q (QR, QA, QB); break; | |
439 | /* * */ | |
440 | case FMULS: FP_MUL_S (SR, SA, SB); break; | |
441 | case FSMULD: FP_CONV (D, S, 1, 1, DA, SA); | |
442 | FP_CONV (D, S, 1, 1, DB, SB); | |
443 | case FMULD: FP_MUL_D (DR, DA, DB); break; | |
444 | case FDMULQ: FP_CONV (Q, D, 2, 1, QA, DA); | |
445 | FP_CONV (Q, D, 2, 1, QB, DB); | |
446 | case FMULQ: FP_MUL_Q (QR, QA, QB); break; | |
447 | /* / */ | |
448 | case FDIVS: FP_DIV_S (SR, SA, SB); break; | |
449 | case FDIVD: FP_DIV_D (DR, DA, DB); break; | |
450 | case FDIVQ: FP_DIV_Q (QR, QA, QB); break; | |
451 | /* sqrt */ | |
452 | case FSQRTS: FP_SQRT_S (SR, SB); break; | |
453 | case FSQRTD: FP_SQRT_D (DR, DB); break; | |
454 | case FSQRTQ: FP_SQRT_Q (QR, QB); break; | |
455 | /* mov */ | |
456 | case FMOVQ: rd->q[0] = rs2->q[0]; rd->q[1] = rs2->q[1]; break; | |
457 | case FABSQ: rd->q[0] = rs2->q[0] & 0x7fffffffffffffffUL; rd->q[1] = rs2->q[1]; break; | |
458 | case FNEGQ: rd->q[0] = rs2->q[0] ^ 0x8000000000000000UL; rd->q[1] = rs2->q[1]; break; | |
459 | /* float to int */ | |
460 | case FSTOI: FP_TO_INT_S (IR, SB, 32, 1); break; | |
461 | case FDTOI: FP_TO_INT_D (IR, DB, 32, 1); break; | |
462 | case FQTOI: FP_TO_INT_Q (IR, QB, 32, 1); break; | |
463 | case FSTOX: FP_TO_INT_S (XR, SB, 64, 1); break; | |
464 | case FDTOX: FP_TO_INT_D (XR, DB, 64, 1); break; | |
465 | case FQTOX: FP_TO_INT_Q (XR, QB, 64, 1); break; | |
466 | /* int to float */ | |
467 | case FITOQ: IR = rs2->s; FP_FROM_INT_Q (QR, IR, 32, int); break; | |
468 | case FXTOQ: XR = rs2->d; FP_FROM_INT_Q (QR, XR, 64, long); break; | |
469 | /* Only Ultra-III generates these */ | |
470 | case FXTOS: XR = rs2->d; FP_FROM_INT_S (SR, XR, 64, long); break; | |
471 | case FXTOD: XR = rs2->d; FP_FROM_INT_D (DR, XR, 64, long); break; | |
472 | #if 0 /* Optimized inline in sparc64/kernel/entry.S */ | |
473 | case FITOS: IR = rs2->s; FP_FROM_INT_S (SR, IR, 32, int); break; | |
474 | #endif | |
475 | case FITOD: IR = rs2->s; FP_FROM_INT_D (DR, IR, 32, int); break; | |
476 | /* float to float */ | |
477 | case FSTOD: FP_CONV (D, S, 1, 1, DR, SB); break; | |
478 | case FSTOQ: FP_CONV (Q, S, 2, 1, QR, SB); break; | |
479 | case FDTOQ: FP_CONV (Q, D, 2, 1, QR, DB); break; | |
480 | case FDTOS: FP_CONV (S, D, 1, 1, SR, DB); break; | |
481 | case FQTOS: FP_CONV (S, Q, 1, 2, SR, QB); break; | |
482 | case FQTOD: FP_CONV (D, Q, 1, 2, DR, QB); break; | |
483 | /* comparison */ | |
484 | case FCMPQ: | |
485 | case FCMPEQ: | |
486 | FP_CMP_Q(XR, QB, QA, 3); | |
487 | if (XR == 3 && | |
488 | (((insn >> 5) & 0x1ff) == FCMPEQ || | |
489 | FP_ISSIGNAN_Q(QA) || | |
490 | FP_ISSIGNAN_Q(QB))) | |
491 | FP_SET_EXCEPTION (FP_EX_INVALID); | |
492 | } | |
493 | if (!FP_INHIBIT_RESULTS) { | |
494 | switch ((type >> 6) & 0x7) { | |
495 | case 0: xfsr = current_thread_info()->xfsr[0]; | |
496 | if (XR == -1) XR = 2; | |
497 | switch (freg & 3) { | |
498 | /* fcc0, 1, 2, 3 */ | |
499 | case 0: xfsr &= ~0xc00; xfsr |= (XR << 10); break; | |
500 | case 1: xfsr &= ~0x300000000UL; xfsr |= (XR << 32); break; | |
501 | case 2: xfsr &= ~0xc00000000UL; xfsr |= (XR << 34); break; | |
502 | case 3: xfsr &= ~0x3000000000UL; xfsr |= (XR << 36); break; | |
503 | } | |
504 | current_thread_info()->xfsr[0] = xfsr; | |
505 | break; | |
506 | case 1: rd->s = IR; break; | |
507 | case 2: rd->d = XR; break; | |
508 | case 5: FP_PACK_SP (rd, SR); break; | |
509 | case 6: FP_PACK_DP (rd, DR); break; | |
510 | case 7: FP_PACK_QP (rd, QR); break; | |
511 | } | |
512 | } | |
513 | ||
514 | if(_fex != 0) | |
515 | return record_exception(regs, _fex); | |
516 | ||
517 | /* Success and no exceptions detected. */ | |
518 | current_thread_info()->xfsr[0] &= ~(FSR_CEXC_MASK); | |
519 | regs->tpc = regs->tnpc; | |
520 | regs->tnpc += 4; | |
521 | return 1; | |
522 | } | |
523 | err: return 0; | |
524 | } |