2 * Copyright (C) 1999 Eddie C. Dost (ecd@atecom.com)
5 #include <linux/types.h>
6 #include <linux/sched.h>
8 #include <asm/uaccess.h>
11 #include "sfp-machine.h"
14 #define FLOATFUNC(x) extern int x(void *, void *, void *, void *)
68 #define OP31 0x1f /* 31 */
69 #define LFS 0x30 /* 48 */
70 #define LFSU 0x31 /* 49 */
71 #define LFD 0x32 /* 50 */
72 #define LFDU 0x33 /* 51 */
73 #define STFS 0x34 /* 52 */
74 #define STFSU 0x35 /* 53 */
75 #define STFD 0x36 /* 54 */
76 #define STFDU 0x37 /* 55 */
77 #define OP59 0x3b /* 59 */
78 #define OP63 0x3f /* 63 */
82 #define LFSX 0x217 /* 535 */
83 #define LFSUX 0x237 /* 567 */
84 #define LFDX 0x257 /* 599 */
85 #define LFDUX 0x277 /* 631 */
86 #define STFSX 0x297 /* 663 */
87 #define STFSUX 0x2b7 /* 695 */
88 #define STFDX 0x2d7 /* 727 */
89 #define STFDUX 0x2f7 /* 759 */
90 #define STFIWX 0x3d7 /* 983 */
94 #define FDIVS 0x012 /* 18 */
95 #define FSUBS 0x014 /* 20 */
96 #define FADDS 0x015 /* 21 */
97 #define FSQRTS 0x016 /* 22 */
98 #define FRES 0x018 /* 24 */
99 #define FMULS 0x019 /* 25 */
100 #define FMSUBS 0x01c /* 28 */
101 #define FMADDS 0x01d /* 29 */
102 #define FNMSUBS 0x01e /* 30 */
103 #define FNMADDS 0x01f /* 31 */
107 #define FDIV 0x012 /* 18 */
108 #define FSUB 0x014 /* 20 */
109 #define FADD 0x015 /* 21 */
110 #define FSQRT 0x016 /* 22 */
111 #define FSEL 0x017 /* 23 */
112 #define FMUL 0x019 /* 25 */
113 #define FRSQRTE 0x01a /* 26 */
114 #define FMSUB 0x01c /* 28 */
115 #define FMADD 0x01d /* 29 */
116 #define FNMSUB 0x01e /* 30 */
117 #define FNMADD 0x01f /* 31 */
120 #define FCMPU 0x000 /* 0 */
121 #define FRSP 0x00c /* 12 */
122 #define FCTIW 0x00e /* 14 */
123 #define FCTIWZ 0x00f /* 15 */
124 #define FCMPO 0x020 /* 32 */
125 #define MTFSB1 0x026 /* 38 */
126 #define FNEG 0x028 /* 40 */
127 #define MCRFS 0x040 /* 64 */
128 #define MTFSB0 0x046 /* 70 */
129 #define FMR 0x048 /* 72 */
130 #define MTFSFI 0x086 /* 134 */
131 #define FNABS 0x088 /* 136 */
132 #define FABS 0x108 /* 264 */
133 #define MFFS 0x247 /* 583 */
134 #define MTFSF 0x2c7 /* 711 */
153 #ifdef CONFIG_MATH_EMULATION
155 record_exception(struct pt_regs *regs, int eflag)
163 if (eflag & EFLAG_OVERFLOW)
165 if (eflag & EFLAG_UNDERFLOW)
167 if (eflag & EFLAG_DIVZERO)
169 if (eflag & EFLAG_INEXACT)
171 if (eflag & EFLAG_VXSNAN)
172 fpscr |= FPSCR_VXSNAN;
173 if (eflag & EFLAG_VXISI)
174 fpscr |= FPSCR_VXISI;
175 if (eflag & EFLAG_VXIDI)
176 fpscr |= FPSCR_VXIDI;
177 if (eflag & EFLAG_VXZDZ)
178 fpscr |= FPSCR_VXZDZ;
179 if (eflag & EFLAG_VXIMZ)
180 fpscr |= FPSCR_VXIMZ;
181 if (eflag & EFLAG_VXVC)
183 if (eflag & EFLAG_VXSOFT)
184 fpscr |= FPSCR_VXSOFT;
185 if (eflag & EFLAG_VXSQRT)
186 fpscr |= FPSCR_VXSQRT;
187 if (eflag & EFLAG_VXCVI)
188 fpscr |= FPSCR_VXCVI;
191 fpscr &= ~(FPSCR_VX);
192 if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI |
193 FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC |
194 FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI))
197 fpscr &= ~(FPSCR_FEX);
198 if (((fpscr & FPSCR_VX) && (fpscr & FPSCR_VE)) ||
199 ((fpscr & FPSCR_OX) && (fpscr & FPSCR_OE)) ||
200 ((fpscr & FPSCR_UX) && (fpscr & FPSCR_UE)) ||
201 ((fpscr & FPSCR_ZX) && (fpscr & FPSCR_ZE)) ||
202 ((fpscr & FPSCR_XX) && (fpscr & FPSCR_XE)))
207 return (fpscr & FPSCR_FEX) ? 1 : 0;
209 #endif /* CONFIG_MATH_EMULATION */
212 do_mathemu(struct pt_regs *regs)
214 void *op0 = 0, *op1 = 0, *op2 = 0, *op3 = 0;
215 unsigned long pc = regs->nip;
219 #ifdef CONFIG_MATH_EMULATION
220 int (*func)(void *, void *, void *, void *);
225 if (get_user(insn, (u32 *)pc))
228 #ifndef CONFIG_MATH_EMULATION
229 switch (insn >> 26) {
231 idx = (insn >> 16) & 0x1f;
232 sdisp = (insn & 0xffff);
233 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
234 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
235 lfd(op0, op1, op2, op3);
238 idx = (insn >> 16) & 0x1f;
239 sdisp = (insn & 0xffff);
240 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
241 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
242 lfd(op0, op1, op2, op3);
243 regs->gpr[idx] = (unsigned long)op1;
246 idx = (insn >> 16) & 0x1f;
247 sdisp = (insn & 0xffff);
248 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
249 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
250 stfd(op0, op1, op2, op3);
253 idx = (insn >> 16) & 0x1f;
254 sdisp = (insn & 0xffff);
255 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
256 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
257 stfd(op0, op1, op2, op3);
258 regs->gpr[idx] = (unsigned long)op1;
261 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
262 op1 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
263 fmr(op0, op1, op2, op3);
268 #else /* CONFIG_MATH_EMULATION */
269 switch (insn >> 26) {
270 case LFS: func = lfs; type = D; break;
271 case LFSU: func = lfs; type = DU; break;
272 case LFD: func = lfd; type = D; break;
273 case LFDU: func = lfd; type = DU; break;
274 case STFS: func = stfs; type = D; break;
275 case STFSU: func = stfs; type = DU; break;
276 case STFD: func = stfd; type = D; break;
277 case STFDU: func = stfd; type = DU; break;
280 switch ((insn >> 1) & 0x3ff) {
281 case LFSX: func = lfs; type = XE; break;
282 case LFSUX: func = lfs; type = XEU; break;
283 case LFDX: func = lfd; type = XE; break;
284 case LFDUX: func = lfd; type = XEU; break;
285 case STFSX: func = stfs; type = XE; break;
286 case STFSUX: func = stfs; type = XEU; break;
287 case STFDX: func = stfd; type = XE; break;
288 case STFDUX: func = stfd; type = XEU; break;
289 case STFIWX: func = stfiwx; type = XE; break;
296 switch ((insn >> 1) & 0x1f) {
297 case FDIVS: func = fdivs; type = AB; break;
298 case FSUBS: func = fsubs; type = AB; break;
299 case FADDS: func = fadds; type = AB; break;
300 case FSQRTS: func = fsqrts; type = AB; break;
301 case FRES: func = fres; type = AB; break;
302 case FMULS: func = fmuls; type = AC; break;
303 case FMSUBS: func = fmsubs; type = ABC; break;
304 case FMADDS: func = fmadds; type = ABC; break;
305 case FNMSUBS: func = fnmsubs; type = ABC; break;
306 case FNMADDS: func = fnmadds; type = ABC; break;
314 switch ((insn >> 1) & 0x1f) {
315 case FDIV: func = fdiv; type = AB; break;
316 case FSUB: func = fsub; type = AB; break;
317 case FADD: func = fadd; type = AB; break;
318 case FSQRT: func = fsqrt; type = AB; break;
319 case FSEL: func = fsel; type = ABC; break;
320 case FMUL: func = fmul; type = AC; break;
321 case FRSQRTE: func = frsqrte; type = AB; break;
322 case FMSUB: func = fmsub; type = ABC; break;
323 case FMADD: func = fmadd; type = ABC; break;
324 case FNMSUB: func = fnmsub; type = ABC; break;
325 case FNMADD: func = fnmadd; type = ABC; break;
332 switch ((insn >> 1) & 0x3ff) {
333 case FCMPU: func = fcmpu; type = XCR; break;
334 case FRSP: func = frsp; type = XB; break;
335 case FCTIW: func = fctiw; type = XB; break;
336 case FCTIWZ: func = fctiwz; type = XB; break;
337 case FCMPO: func = fcmpo; type = XCR; break;
338 case MTFSB1: func = mtfsb1; type = XCRB; break;
339 case FNEG: func = fneg; type = XB; break;
340 case MCRFS: func = mcrfs; type = XCRL; break;
341 case MTFSB0: func = mtfsb0; type = XCRB; break;
342 case FMR: func = fmr; type = XB; break;
343 case MTFSFI: func = mtfsfi; type = XCRI; break;
344 case FNABS: func = fnabs; type = XB; break;
345 case FABS: func = fabs; type = XB; break;
346 case MFFS: func = mffs; type = X; break;
347 case MTFSF: func = mtfsf; type = XFLB; break;
359 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
360 op1 = (void *)¤t->thread.fpr[(insn >> 16) & 0x1f];
361 op2 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
365 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
366 op1 = (void *)¤t->thread.fpr[(insn >> 16) & 0x1f];
367 op2 = (void *)¤t->thread.fpr[(insn >> 6) & 0x1f];
371 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
372 op1 = (void *)¤t->thread.fpr[(insn >> 16) & 0x1f];
373 op2 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
374 op3 = (void *)¤t->thread.fpr[(insn >> 6) & 0x1f];
378 idx = (insn >> 16) & 0x1f;
379 sdisp = (insn & 0xffff);
380 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
381 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
385 idx = (insn >> 16) & 0x1f;
389 sdisp = (insn & 0xffff);
390 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
391 op1 = (void *)(regs->gpr[idx] + sdisp);
395 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
399 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
400 op1 = (void *)¤t->thread.fpr[(insn >> 16) & 0x1f];
404 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
405 op1 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
409 idx = (insn >> 16) & 0x1f;
413 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
414 op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]);
418 idx = (insn >> 16) & 0x1f;
419 op0 = (void *)¤t->thread.fpr[(insn >> 21) & 0x1f];
420 op1 = (void *)((idx ? regs->gpr[idx] : 0)
421 + regs->gpr[(insn >> 11) & 0x1f]);
425 op0 = (void *)®s->ccr;
426 op1 = (void *)((insn >> 23) & 0x7);
427 op2 = (void *)¤t->thread.fpr[(insn >> 16) & 0x1f];
428 op3 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
432 op0 = (void *)®s->ccr;
433 op1 = (void *)((insn >> 23) & 0x7);
434 op2 = (void *)((insn >> 18) & 0x7);
438 op0 = (void *)((insn >> 21) & 0x1f);
442 op0 = (void *)((insn >> 23) & 0x7);
443 op1 = (void *)((insn >> 12) & 0xf);
447 op0 = (void *)((insn >> 17) & 0xff);
448 op1 = (void *)¤t->thread.fpr[(insn >> 11) & 0x1f];
455 eflag = func(op0, op1, op2, op3);
458 regs->ccr &= ~(0x0f000000);
459 regs->ccr |= (__FPU_FPSCR >> 4) & 0x0f000000;
462 trap = record_exception(regs, eflag);
469 regs->gpr[idx] = (unsigned long)op1;
475 #endif /* CONFIG_MATH_EMULATION */