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 <asm/sfp-machine.h>
12 #include <math-emu/double.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_INVALID)
173 if (eflag & EFLAG_VXSNAN)
174 fpscr |= FPSCR_VXSNAN;
175 if (eflag & EFLAG_VXISI)
176 fpscr |= FPSCR_VXISI;
177 if (eflag & EFLAG_VXIDI)
178 fpscr |= FPSCR_VXIDI;
179 if (eflag & EFLAG_VXZDZ)
180 fpscr |= FPSCR_VXZDZ;
181 if (eflag & EFLAG_VXIMZ)
182 fpscr |= FPSCR_VXIMZ;
183 if (eflag & EFLAG_VXVC)
185 if (eflag & EFLAG_VXSOFT)
186 fpscr |= FPSCR_VXSOFT;
187 if (eflag & EFLAG_VXSQRT)
188 fpscr |= FPSCR_VXSQRT;
189 if (eflag & EFLAG_VXCVI)
190 fpscr |= FPSCR_VXCVI;
193 // fpscr &= ~(FPSCR_VX);
194 if (fpscr & (FPSCR_VXSNAN | FPSCR_VXISI | FPSCR_VXIDI |
195 FPSCR_VXZDZ | FPSCR_VXIMZ | FPSCR_VXVC |
196 FPSCR_VXSOFT | FPSCR_VXSQRT | FPSCR_VXCVI))
199 fpscr &= ~(FPSCR_FEX);
200 if (((fpscr & FPSCR_VX) && (fpscr & FPSCR_VE)) ||
201 ((fpscr & FPSCR_OX) && (fpscr & FPSCR_OE)) ||
202 ((fpscr & FPSCR_UX) && (fpscr & FPSCR_UE)) ||
203 ((fpscr & FPSCR_ZX) && (fpscr & FPSCR_ZE)) ||
204 ((fpscr & FPSCR_XX) && (fpscr & FPSCR_XE)))
209 return (fpscr & FPSCR_FEX) ? 1 : 0;
211 #endif /* CONFIG_MATH_EMULATION */
214 do_mathemu(struct pt_regs *regs)
216 void *op0 = 0, *op1 = 0, *op2 = 0, *op3 = 0;
217 unsigned long pc = regs->nip;
221 #ifdef CONFIG_MATH_EMULATION
222 int (*func)(void *, void *, void *, void *);
227 if (get_user(insn, (u32 *)pc))
230 #ifndef CONFIG_MATH_EMULATION
231 switch (insn >> 26) {
233 idx = (insn >> 16) & 0x1f;
234 sdisp = (insn & 0xffff);
235 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
236 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
237 lfd(op0, op1, op2, op3);
240 idx = (insn >> 16) & 0x1f;
241 sdisp = (insn & 0xffff);
242 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
243 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
244 lfd(op0, op1, op2, op3);
245 regs->gpr[idx] = (unsigned long)op1;
248 idx = (insn >> 16) & 0x1f;
249 sdisp = (insn & 0xffff);
250 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
251 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
252 stfd(op0, op1, op2, op3);
255 idx = (insn >> 16) & 0x1f;
256 sdisp = (insn & 0xffff);
257 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
258 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
259 stfd(op0, op1, op2, op3);
260 regs->gpr[idx] = (unsigned long)op1;
263 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
264 op1 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
265 fmr(op0, op1, op2, op3);
270 #else /* CONFIG_MATH_EMULATION */
271 switch (insn >> 26) {
272 case LFS: func = lfs; type = D; break;
273 case LFSU: func = lfs; type = DU; break;
274 case LFD: func = lfd; type = D; break;
275 case LFDU: func = lfd; type = DU; break;
276 case STFS: func = stfs; type = D; break;
277 case STFSU: func = stfs; type = DU; break;
278 case STFD: func = stfd; type = D; break;
279 case STFDU: func = stfd; type = DU; break;
282 switch ((insn >> 1) & 0x3ff) {
283 case LFSX: func = lfs; type = XE; break;
284 case LFSUX: func = lfs; type = XEU; break;
285 case LFDX: func = lfd; type = XE; break;
286 case LFDUX: func = lfd; type = XEU; break;
287 case STFSX: func = stfs; type = XE; break;
288 case STFSUX: func = stfs; type = XEU; break;
289 case STFDX: func = stfd; type = XE; break;
290 case STFDUX: func = stfd; type = XEU; break;
291 case STFIWX: func = stfiwx; type = XE; break;
298 switch ((insn >> 1) & 0x1f) {
299 case FDIVS: func = fdivs; type = AB; break;
300 case FSUBS: func = fsubs; type = AB; break;
301 case FADDS: func = fadds; type = AB; break;
302 case FSQRTS: func = fsqrts; type = AB; break;
303 case FRES: func = fres; type = AB; break;
304 case FMULS: func = fmuls; type = AC; break;
305 case FMSUBS: func = fmsubs; type = ABC; break;
306 case FMADDS: func = fmadds; type = ABC; break;
307 case FNMSUBS: func = fnmsubs; type = ABC; break;
308 case FNMADDS: func = fnmadds; type = ABC; break;
316 switch ((insn >> 1) & 0x1f) {
317 case FDIV: func = fdiv; type = AB; break;
318 case FSUB: func = fsub; type = AB; break;
319 case FADD: func = fadd; type = AB; break;
320 case FSQRT: func = fsqrt; type = AB; break;
321 case FSEL: func = fsel; type = ABC; break;
322 case FMUL: func = fmul; type = AC; break;
323 case FRSQRTE: func = frsqrte; type = AB; break;
324 case FMSUB: func = fmsub; type = ABC; break;
325 case FMADD: func = fmadd; type = ABC; break;
326 case FNMSUB: func = fnmsub; type = ABC; break;
327 case FNMADD: func = fnmadd; type = ABC; break;
334 switch ((insn >> 1) & 0x3ff) {
335 case FCMPU: func = fcmpu; type = XCR; break;
336 case FRSP: func = frsp; type = XB; break;
337 case FCTIW: func = fctiw; type = XB; break;
338 case FCTIWZ: func = fctiwz; type = XB; break;
339 case FCMPO: func = fcmpo; type = XCR; break;
340 case MTFSB1: func = mtfsb1; type = XCRB; break;
341 case FNEG: func = fneg; type = XB; break;
342 case MCRFS: func = mcrfs; type = XCRL; break;
343 case MTFSB0: func = mtfsb0; type = XCRB; break;
344 case FMR: func = fmr; type = XB; break;
345 case MTFSFI: func = mtfsfi; type = XCRI; break;
346 case FNABS: func = fnabs; type = XB; break;
347 case FABS: func = fabs; type = XB; break;
348 case MFFS: func = mffs; type = X; break;
349 case MTFSF: func = mtfsf; type = XFLB; break;
361 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
362 op1 = (void *)¤t->thread.TS_FPR((insn >> 16) & 0x1f);
363 op2 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
367 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
368 op1 = (void *)¤t->thread.TS_FPR((insn >> 16) & 0x1f);
369 op2 = (void *)¤t->thread.TS_FPR((insn >> 6) & 0x1f);
373 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
374 op1 = (void *)¤t->thread.TS_FPR((insn >> 16) & 0x1f);
375 op2 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
376 op3 = (void *)¤t->thread.TS_FPR((insn >> 6) & 0x1f);
380 idx = (insn >> 16) & 0x1f;
381 sdisp = (insn & 0xffff);
382 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
383 op1 = (void *)((idx ? regs->gpr[idx] : 0) + sdisp);
387 idx = (insn >> 16) & 0x1f;
391 sdisp = (insn & 0xffff);
392 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
393 op1 = (void *)(regs->gpr[idx] + sdisp);
397 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
401 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
402 op1 = (void *)¤t->thread.TS_FPR((insn >> 16) & 0x1f);
406 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
407 op1 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
411 idx = (insn >> 16) & 0x1f;
412 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
414 if (((insn >> 1) & 0x3ff) == STFIWX)
415 op1 = (void *)(regs->gpr[(insn >> 11) & 0x1f]);
419 op1 = (void *)(regs->gpr[idx] + regs->gpr[(insn >> 11) & 0x1f]);
425 idx = (insn >> 16) & 0x1f;
426 op0 = (void *)¤t->thread.TS_FPR((insn >> 21) & 0x1f);
427 op1 = (void *)((idx ? regs->gpr[idx] : 0)
428 + regs->gpr[(insn >> 11) & 0x1f]);
432 op0 = (void *)®s->ccr;
433 op1 = (void *)((insn >> 23) & 0x7);
434 op2 = (void *)¤t->thread.TS_FPR((insn >> 16) & 0x1f);
435 op3 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
439 op0 = (void *)®s->ccr;
440 op1 = (void *)((insn >> 23) & 0x7);
441 op2 = (void *)((insn >> 18) & 0x7);
445 op0 = (void *)((insn >> 21) & 0x1f);
449 op0 = (void *)((insn >> 23) & 0x7);
450 op1 = (void *)((insn >> 12) & 0xf);
454 op0 = (void *)((insn >> 17) & 0xff);
455 op1 = (void *)¤t->thread.TS_FPR((insn >> 11) & 0x1f);
462 eflag = func(op0, op1, op2, op3);
465 regs->ccr &= ~(0x0f000000);
466 regs->ccr |= (__FPU_FPSCR >> 4) & 0x0f000000;
469 trap = record_exception(regs, eflag);
476 regs->gpr[idx] = (unsigned long)op1;
482 #endif /* CONFIG_MATH_EMULATION */