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21#include "qemu/osdep.h"
22#include "cpu.h"
23#include "exec/helper-proto.h"
24#include "exec/exec-all.h"
25#include "exec/cpu_ldst.h"
26
27
28
29
30
31static const floatx80 fpu_rom[128] = {
32 [0x00] = floatx80_pi,
33 [0x0b] = make_floatx80(0x3ffd, 0x9a209a84fbcff798ULL),
34 [0x0c] = make_floatx80(0x4000, 0xadf85458a2bb4a9aULL),
35 [0x0d] = make_floatx80(0x3fff, 0xb8aa3b295c17f0bcULL),
36 [0x0e] = make_floatx80(0x3ffd, 0xde5bd8a937287195ULL),
37 [0x0f] = floatx80_zero,
38 [0x30] = floatx80_ln2,
39 [0x31] = make_floatx80(0x4000, 0x935d8dddaaa8ac17ULL),
40 [0x32] = floatx80_one,
41 [0x33] = make_floatx80(0x4002, 0xa000000000000000ULL),
42 [0x34] = make_floatx80(0x4005, 0xc800000000000000ULL),
43 [0x35] = make_floatx80(0x400c, 0x9c40000000000000ULL),
44 [0x36] = make_floatx80(0x4019, 0xbebc200000000000ULL),
45 [0x37] = make_floatx80(0x4034, 0x8e1bc9bf04000000ULL),
46 [0x38] = make_floatx80(0x4069, 0x9dc5ada82b70b59eULL),
47 [0x39] = make_floatx80(0x40d3, 0xc2781f49ffcfa6d5ULL),
48 [0x3a] = make_floatx80(0x41a8, 0x93ba47c980e98ce0ULL),
49 [0x3b] = make_floatx80(0x4351, 0xaa7eebfb9df9de8eULL),
50 [0x3c] = make_floatx80(0x46a3, 0xe319a0aea60e91c7ULL),
51 [0x3d] = make_floatx80(0x4d48, 0xc976758681750c17ULL),
52 [0x3e] = make_floatx80(0x5a92, 0x9e8b3b5dc53d5de5ULL),
53 [0x3f] = make_floatx80(0x7525, 0xc46052028a20979bULL),
54};
55
56int32_t HELPER(reds32)(CPUM68KState *env, FPReg *val)
57{
58 return floatx80_to_int32(val->d, &env->fp_status);
59}
60
61float32 HELPER(redf32)(CPUM68KState *env, FPReg *val)
62{
63 return floatx80_to_float32(val->d, &env->fp_status);
64}
65
66void HELPER(exts32)(CPUM68KState *env, FPReg *res, int32_t val)
67{
68 res->d = int32_to_floatx80(val, &env->fp_status);
69}
70
71void HELPER(extf32)(CPUM68KState *env, FPReg *res, float32 val)
72{
73 res->d = float32_to_floatx80(val, &env->fp_status);
74}
75
76void HELPER(extf64)(CPUM68KState *env, FPReg *res, float64 val)
77{
78 res->d = float64_to_floatx80(val, &env->fp_status);
79}
80
81float64 HELPER(redf64)(CPUM68KState *env, FPReg *val)
82{
83 return floatx80_to_float64(val->d, &env->fp_status);
84}
85
86void HELPER(firound)(CPUM68KState *env, FPReg *res, FPReg *val)
87{
88 res->d = floatx80_round_to_int(val->d, &env->fp_status);
89}
90
91static void m68k_restore_precision_mode(CPUM68KState *env)
92{
93 switch (env->fpcr & FPCR_PREC_MASK) {
94 case FPCR_PREC_X:
95 set_floatx80_rounding_precision(80, &env->fp_status);
96 break;
97 case FPCR_PREC_S:
98 set_floatx80_rounding_precision(32, &env->fp_status);
99 break;
100 case FPCR_PREC_D:
101 set_floatx80_rounding_precision(64, &env->fp_status);
102 break;
103 case FPCR_PREC_U:
104 default:
105 break;
106 }
107}
108
109static void cf_restore_precision_mode(CPUM68KState *env)
110{
111 if (env->fpcr & FPCR_PREC_S) {
112 set_floatx80_rounding_precision(32, &env->fp_status);
113 } else {
114 set_floatx80_rounding_precision(64, &env->fp_status);
115 }
116}
117
118static void restore_rounding_mode(CPUM68KState *env)
119{
120 switch (env->fpcr & FPCR_RND_MASK) {
121 case FPCR_RND_N:
122 set_float_rounding_mode(float_round_nearest_even, &env->fp_status);
123 break;
124 case FPCR_RND_Z:
125 set_float_rounding_mode(float_round_to_zero, &env->fp_status);
126 break;
127 case FPCR_RND_M:
128 set_float_rounding_mode(float_round_down, &env->fp_status);
129 break;
130 case FPCR_RND_P:
131 set_float_rounding_mode(float_round_up, &env->fp_status);
132 break;
133 }
134}
135
136void cpu_m68k_set_fpcr(CPUM68KState *env, uint32_t val)
137{
138 env->fpcr = val & 0xffff;
139
140 if (m68k_feature(env, M68K_FEATURE_CF_FPU)) {
141 cf_restore_precision_mode(env);
142 } else {
143 m68k_restore_precision_mode(env);
144 }
145 restore_rounding_mode(env);
146}
147
148void HELPER(fitrunc)(CPUM68KState *env, FPReg *res, FPReg *val)
149{
150 int rounding_mode = get_float_rounding_mode(&env->fp_status);
151 set_float_rounding_mode(float_round_to_zero, &env->fp_status);
152 res->d = floatx80_round_to_int(val->d, &env->fp_status);
153 set_float_rounding_mode(rounding_mode, &env->fp_status);
154}
155
156void HELPER(set_fpcr)(CPUM68KState *env, uint32_t val)
157{
158 cpu_m68k_set_fpcr(env, val);
159}
160
161#define PREC_BEGIN(prec) \
162 do { \
163 int old; \
164 old = get_floatx80_rounding_precision(&env->fp_status); \
165 set_floatx80_rounding_precision(prec, &env->fp_status) \
166
167#define PREC_END() \
168 set_floatx80_rounding_precision(old, &env->fp_status); \
169 } while (0)
170
171void HELPER(fsround)(CPUM68KState *env, FPReg *res, FPReg *val)
172{
173 PREC_BEGIN(32);
174 res->d = floatx80_round(val->d, &env->fp_status);
175 PREC_END();
176}
177
178void HELPER(fdround)(CPUM68KState *env, FPReg *res, FPReg *val)
179{
180 PREC_BEGIN(64);
181 res->d = floatx80_round(val->d, &env->fp_status);
182 PREC_END();
183}
184
185void HELPER(fsqrt)(CPUM68KState *env, FPReg *res, FPReg *val)
186{
187 res->d = floatx80_sqrt(val->d, &env->fp_status);
188}
189
190void HELPER(fssqrt)(CPUM68KState *env, FPReg *res, FPReg *val)
191{
192 PREC_BEGIN(32);
193 res->d = floatx80_sqrt(val->d, &env->fp_status);
194 PREC_END();
195}
196
197void HELPER(fdsqrt)(CPUM68KState *env, FPReg *res, FPReg *val)
198{
199 PREC_BEGIN(64);
200 res->d = floatx80_sqrt(val->d, &env->fp_status);
201 PREC_END();
202}
203
204void HELPER(fabs)(CPUM68KState *env, FPReg *res, FPReg *val)
205{
206 res->d = floatx80_round(floatx80_abs(val->d), &env->fp_status);
207}
208
209void HELPER(fsabs)(CPUM68KState *env, FPReg *res, FPReg *val)
210{
211 PREC_BEGIN(32);
212 res->d = floatx80_round(floatx80_abs(val->d), &env->fp_status);
213 PREC_END();
214}
215
216void HELPER(fdabs)(CPUM68KState *env, FPReg *res, FPReg *val)
217{
218 PREC_BEGIN(64);
219 res->d = floatx80_round(floatx80_abs(val->d), &env->fp_status);
220 PREC_END();
221}
222
223void HELPER(fneg)(CPUM68KState *env, FPReg *res, FPReg *val)
224{
225 res->d = floatx80_round(floatx80_chs(val->d), &env->fp_status);
226}
227
228void HELPER(fsneg)(CPUM68KState *env, FPReg *res, FPReg *val)
229{
230 PREC_BEGIN(32);
231 res->d = floatx80_round(floatx80_chs(val->d), &env->fp_status);
232 PREC_END();
233}
234
235void HELPER(fdneg)(CPUM68KState *env, FPReg *res, FPReg *val)
236{
237 PREC_BEGIN(64);
238 res->d = floatx80_round(floatx80_chs(val->d), &env->fp_status);
239 PREC_END();
240}
241
242void HELPER(fadd)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
243{
244 res->d = floatx80_add(val0->d, val1->d, &env->fp_status);
245}
246
247void HELPER(fsadd)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
248{
249 PREC_BEGIN(32);
250 res->d = floatx80_add(val0->d, val1->d, &env->fp_status);
251 PREC_END();
252}
253
254void HELPER(fdadd)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
255{
256 PREC_BEGIN(64);
257 res->d = floatx80_add(val0->d, val1->d, &env->fp_status);
258 PREC_END();
259}
260
261void HELPER(fsub)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
262{
263 res->d = floatx80_sub(val1->d, val0->d, &env->fp_status);
264}
265
266void HELPER(fssub)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
267{
268 PREC_BEGIN(32);
269 res->d = floatx80_sub(val1->d, val0->d, &env->fp_status);
270 PREC_END();
271}
272
273void HELPER(fdsub)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
274{
275 PREC_BEGIN(64);
276 res->d = floatx80_sub(val1->d, val0->d, &env->fp_status);
277 PREC_END();
278}
279
280void HELPER(fmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
281{
282 res->d = floatx80_mul(val0->d, val1->d, &env->fp_status);
283}
284
285void HELPER(fsmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
286{
287 PREC_BEGIN(32);
288 res->d = floatx80_mul(val0->d, val1->d, &env->fp_status);
289 PREC_END();
290}
291
292void HELPER(fdmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
293{
294 PREC_BEGIN(64);
295 res->d = floatx80_mul(val0->d, val1->d, &env->fp_status);
296 PREC_END();
297}
298
299void HELPER(fsglmul)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
300{
301 int rounding_mode = get_float_rounding_mode(&env->fp_status);
302 floatx80 a, b;
303
304 PREC_BEGIN(32);
305 set_float_rounding_mode(float_round_to_zero, &env->fp_status);
306 a = floatx80_round(val0->d, &env->fp_status);
307 b = floatx80_round(val1->d, &env->fp_status);
308 set_float_rounding_mode(rounding_mode, &env->fp_status);
309 res->d = floatx80_mul(a, b, &env->fp_status);
310 PREC_END();
311}
312
313void HELPER(fdiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
314{
315 res->d = floatx80_div(val1->d, val0->d, &env->fp_status);
316}
317
318void HELPER(fsdiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
319{
320 PREC_BEGIN(32);
321 res->d = floatx80_div(val1->d, val0->d, &env->fp_status);
322 PREC_END();
323}
324
325void HELPER(fddiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
326{
327 PREC_BEGIN(64);
328 res->d = floatx80_div(val1->d, val0->d, &env->fp_status);
329 PREC_END();
330}
331
332void HELPER(fsgldiv)(CPUM68KState *env, FPReg *res, FPReg *val0, FPReg *val1)
333{
334 int rounding_mode = get_float_rounding_mode(&env->fp_status);
335 floatx80 a, b;
336
337 PREC_BEGIN(32);
338 set_float_rounding_mode(float_round_to_zero, &env->fp_status);
339 a = floatx80_round(val1->d, &env->fp_status);
340 b = floatx80_round(val0->d, &env->fp_status);
341 set_float_rounding_mode(rounding_mode, &env->fp_status);
342 res->d = floatx80_div(a, b, &env->fp_status);
343 PREC_END();
344}
345
346static int float_comp_to_cc(int float_compare)
347{
348 switch (float_compare) {
349 case float_relation_equal:
350 return FPSR_CC_Z;
351 case float_relation_less:
352 return FPSR_CC_N;
353 case float_relation_unordered:
354 return FPSR_CC_A;
355 case float_relation_greater:
356 return 0;
357 default:
358 g_assert_not_reached();
359 }
360}
361
362void HELPER(fcmp)(CPUM68KState *env, FPReg *val0, FPReg *val1)
363{
364 int float_compare;
365
366 float_compare = floatx80_compare(val1->d, val0->d, &env->fp_status);
367 env->fpsr = (env->fpsr & ~FPSR_CC_MASK) | float_comp_to_cc(float_compare);
368}
369
370void HELPER(ftst)(CPUM68KState *env, FPReg *val)
371{
372 uint32_t cc = 0;
373
374 if (floatx80_is_neg(val->d)) {
375 cc |= FPSR_CC_N;
376 }
377
378 if (floatx80_is_any_nan(val->d)) {
379 cc |= FPSR_CC_A;
380 } else if (floatx80_is_infinity(val->d)) {
381 cc |= FPSR_CC_I;
382 } else if (floatx80_is_zero(val->d)) {
383 cc |= FPSR_CC_Z;
384 }
385 env->fpsr = (env->fpsr & ~FPSR_CC_MASK) | cc;
386}
387
388void HELPER(fconst)(CPUM68KState *env, FPReg *val, uint32_t offset)
389{
390 val->d = fpu_rom[offset];
391}
392
393typedef int (*float_access)(CPUM68KState *env, uint32_t addr, FPReg *fp,
394 uintptr_t ra);
395
396static uint32_t fmovem_predec(CPUM68KState *env, uint32_t addr, uint32_t mask,
397 float_access access)
398{
399 uintptr_t ra = GETPC();
400 int i, size;
401
402 for (i = 7; i >= 0; i--, mask <<= 1) {
403 if (mask & 0x80) {
404 size = access(env, addr, &env->fregs[i], ra);
405 if ((mask & 0xff) != 0x80) {
406 addr -= size;
407 }
408 }
409 }
410
411 return addr;
412}
413
414static uint32_t fmovem_postinc(CPUM68KState *env, uint32_t addr, uint32_t mask,
415 float_access access)
416{
417 uintptr_t ra = GETPC();
418 int i, size;
419
420 for (i = 0; i < 8; i++, mask <<= 1) {
421 if (mask & 0x80) {
422 size = access(env, addr, &env->fregs[i], ra);
423 addr += size;
424 }
425 }
426
427 return addr;
428}
429
430static int cpu_ld_floatx80_ra(CPUM68KState *env, uint32_t addr, FPReg *fp,
431 uintptr_t ra)
432{
433 uint32_t high;
434 uint64_t low;
435
436 high = cpu_ldl_data_ra(env, addr, ra);
437 low = cpu_ldq_data_ra(env, addr + 4, ra);
438
439 fp->l.upper = high >> 16;
440 fp->l.lower = low;
441
442 return 12;
443}
444
445static int cpu_st_floatx80_ra(CPUM68KState *env, uint32_t addr, FPReg *fp,
446 uintptr_t ra)
447{
448 cpu_stl_data_ra(env, addr, fp->l.upper << 16, ra);
449 cpu_stq_data_ra(env, addr + 4, fp->l.lower, ra);
450
451 return 12;
452}
453
454static int cpu_ld_float64_ra(CPUM68KState *env, uint32_t addr, FPReg *fp,
455 uintptr_t ra)
456{
457 uint64_t val;
458
459 val = cpu_ldq_data_ra(env, addr, ra);
460 fp->d = float64_to_floatx80(*(float64 *)&val, &env->fp_status);
461
462 return 8;
463}
464
465static int cpu_st_float64_ra(CPUM68KState *env, uint32_t addr, FPReg *fp,
466 uintptr_t ra)
467{
468 float64 val;
469
470 val = floatx80_to_float64(fp->d, &env->fp_status);
471 cpu_stq_data_ra(env, addr, *(uint64_t *)&val, ra);
472
473 return 8;
474}
475
476uint32_t HELPER(fmovemx_st_predec)(CPUM68KState *env, uint32_t addr,
477 uint32_t mask)
478{
479 return fmovem_predec(env, addr, mask, cpu_st_floatx80_ra);
480}
481
482uint32_t HELPER(fmovemx_st_postinc)(CPUM68KState *env, uint32_t addr,
483 uint32_t mask)
484{
485 return fmovem_postinc(env, addr, mask, cpu_st_floatx80_ra);
486}
487
488uint32_t HELPER(fmovemx_ld_postinc)(CPUM68KState *env, uint32_t addr,
489 uint32_t mask)
490{
491 return fmovem_postinc(env, addr, mask, cpu_ld_floatx80_ra);
492}
493
494uint32_t HELPER(fmovemd_st_predec)(CPUM68KState *env, uint32_t addr,
495 uint32_t mask)
496{
497 return fmovem_predec(env, addr, mask, cpu_st_float64_ra);
498}
499
500uint32_t HELPER(fmovemd_st_postinc)(CPUM68KState *env, uint32_t addr,
501 uint32_t mask)
502{
503 return fmovem_postinc(env, addr, mask, cpu_st_float64_ra);
504}
505
506uint32_t HELPER(fmovemd_ld_postinc)(CPUM68KState *env, uint32_t addr,
507 uint32_t mask)
508{
509 return fmovem_postinc(env, addr, mask, cpu_ld_float64_ra);
510}
511
