1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
|
/*
* FPU op helpers
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "fpu/softfloat.h"
#define QT0 (env->qt0)
#define QT1 (env->qt1)
static target_ulong do_check_ieee_exceptions(CPUSPARCState *env, uintptr_t ra)
{
target_ulong status = get_float_exception_flags(&env->fp_status);
target_ulong fsr = env->fsr;
if (unlikely(status)) {
/* Keep exception flags clear for next time. */
set_float_exception_flags(0, &env->fp_status);
/* Copy IEEE 754 flags into FSR */
if (status & float_flag_invalid) {
fsr |= FSR_NVC;
}
if (status & float_flag_overflow) {
fsr |= FSR_OFC;
}
if (status & float_flag_underflow) {
fsr |= FSR_UFC;
}
if (status & float_flag_divbyzero) {
fsr |= FSR_DZC;
}
if (status & float_flag_inexact) {
fsr |= FSR_NXC;
}
if ((fsr & FSR_CEXC_MASK) & ((fsr & FSR_TEM_MASK) >> 23)) {
CPUState *cs = CPU(sparc_env_get_cpu(env));
/* Unmasked exception, generate a trap. Note that while
the helper is marked as NO_WG, we can get away with
writing to cpu state along the exception path, since
TCG generated code will never see the write. */
env->fsr = fsr | FSR_FTT_IEEE_EXCP;
cs->exception_index = TT_FP_EXCP;
cpu_loop_exit_restore(cs, ra);
} else {
/* Accumulate exceptions */
fsr |= (fsr & FSR_CEXC_MASK) << 5;
}
}
return fsr;
}
target_ulong helper_check_ieee_exceptions(CPUSPARCState *env)
{
return do_check_ieee_exceptions(env, GETPC());
}
#define F_HELPER(name, p) void helper_f##name##p(CPUSPARCState *env)
#define F_BINOP(name) \
float32 helper_f ## name ## s (CPUSPARCState *env, float32 src1, \
float32 src2) \
{ \
return float32_ ## name (src1, src2, &env->fp_status); \
} \
float64 helper_f ## name ## d (CPUSPARCState * env, float64 src1,\
float64 src2) \
{ \
return float64_ ## name (src1, src2, &env->fp_status); \
} \
F_HELPER(name, q) \
{ \
QT0 = float128_ ## name (QT0, QT1, &env->fp_status); \
}
F_BINOP(add);
F_BINOP(sub);
F_BINOP(mul);
F_BINOP(div);
#undef F_BINOP
float64 helper_fsmuld(CPUSPARCState *env, float32 src1, float32 src2)
{
return float64_mul(float32_to_float64(src1, &env->fp_status),
float32_to_float64(src2, &env->fp_status),
&env->fp_status);
}
void helper_fdmulq(CPUSPARCState *env, float64 src1, float64 src2)
{
QT0 = float128_mul(float64_to_float128(src1, &env->fp_status),
float64_to_float128(src2, &env->fp_status),
&env->fp_status);
}
float32 helper_fnegs(float32 src)
{
return float32_chs(src);
}
#ifdef TARGET_SPARC64
float64 helper_fnegd(float64 src)
{
return float64_chs(src);
}
F_HELPER(neg, q)
{
QT0 = float128_chs(QT1);
}
#endif
/* Integer to float conversion. */
float32 helper_fitos(CPUSPARCState *env, int32_t src)
{
return int32_to_float32(src, &env->fp_status);
}
float64 helper_fitod(CPUSPARCState *env, int32_t src)
{
return int32_to_float64(src, &env->fp_status);
}
void helper_fitoq(CPUSPARCState *env, int32_t src)
{
QT0 = int32_to_float128(src, &env->fp_status);
}
#ifdef TARGET_SPARC64
float32 helper_fxtos(CPUSPARCState *env, int64_t src)
{
return int64_to_float32(src, &env->fp_status);
}
float64 helper_fxtod(CPUSPARCState *env, int64_t src)
{
return int64_to_float64(src, &env->fp_status);
}
void helper_fxtoq(CPUSPARCState *env, int64_t src)
{
QT0 = int64_to_float128(src, &env->fp_status);
}
#endif
#undef F_HELPER
/* floating point conversion */
float32 helper_fdtos(CPUSPARCState *env, float64 src)
{
return float64_to_float32(src, &env->fp_status);
}
float64 helper_fstod(CPUSPARCState *env, float32 src)
{
return float32_to_float64(src, &env->fp_status);
}
float32 helper_fqtos(CPUSPARCState *env)
{
return float128_to_float32(QT1, &env->fp_status);
}
void helper_fstoq(CPUSPARCState *env, float32 src)
{
QT0 = float32_to_float128(src, &env->fp_status);
}
float64 helper_fqtod(CPUSPARCState *env)
{
return float128_to_float64(QT1, &env->fp_status);
}
void helper_fdtoq(CPUSPARCState *env, float64 src)
{
QT0 = float64_to_float128(src, &env->fp_status);
}
/* Float to integer conversion. */
int32_t helper_fstoi(CPUSPARCState *env, float32 src)
{
return float32_to_int32_round_to_zero(src, &env->fp_status);
}
int32_t helper_fdtoi(CPUSPARCState *env, float64 src)
{
return float64_to_int32_round_to_zero(src, &env->fp_status);
}
int32_t helper_fqtoi(CPUSPARCState *env)
{
return float128_to_int32_round_to_zero(QT1, &env->fp_status);
}
#ifdef TARGET_SPARC64
int64_t helper_fstox(CPUSPARCState *env, float32 src)
{
return float32_to_int64_round_to_zero(src, &env->fp_status);
}
int64_t helper_fdtox(CPUSPARCState *env, float64 src)
{
return float64_to_int64_round_to_zero(src, &env->fp_status);
}
int64_t helper_fqtox(CPUSPARCState *env)
{
return float128_to_int64_round_to_zero(QT1, &env->fp_status);
}
#endif
float32 helper_fabss(float32 src)
{
return float32_abs(src);
}
#ifdef TARGET_SPARC64
float64 helper_fabsd(float64 src)
{
return float64_abs(src);
}
void helper_fabsq(CPUSPARCState *env)
{
QT0 = float128_abs(QT1);
}
#endif
float32 helper_fsqrts(CPUSPARCState *env, float32 src)
{
return float32_sqrt(src, &env->fp_status);
}
float64 helper_fsqrtd(CPUSPARCState *env, float64 src)
{
return float64_sqrt(src, &env->fp_status);
}
void helper_fsqrtq(CPUSPARCState *env)
{
QT0 = float128_sqrt(QT1, &env->fp_status);
}
#define GEN_FCMP(name, size, reg1, reg2, FS, E) \
target_ulong glue(helper_, name) (CPUSPARCState *env) \
{ \
int ret; \
target_ulong fsr; \
if (E) { \
ret = glue(size, _compare)(reg1, reg2, &env->fp_status); \
} else { \
ret = glue(size, _compare_quiet)(reg1, reg2, \
&env->fp_status); \
} \
fsr = do_check_ieee_exceptions(env, GETPC()); \
switch (ret) { \
case float_relation_unordered: \
fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \
fsr |= FSR_NVA; \
break; \
case float_relation_less: \
fsr &= ~(FSR_FCC1) << FS; \
fsr |= FSR_FCC0 << FS; \
break; \
case float_relation_greater: \
fsr &= ~(FSR_FCC0) << FS; \
fsr |= FSR_FCC1 << FS; \
break; \
default: \
fsr &= ~((FSR_FCC1 | FSR_FCC0) << FS); \
break; \
} \
return fsr; \
}
#define GEN_FCMP_T(name, size, FS, E) \
target_ulong glue(helper_, name)(CPUSPARCState *env, size src1, size src2)\
{ \
int ret; \
target_ulong fsr; \
if (E) { \
ret = glue(size, _compare)(src1, src2, &env->fp_status); \
} else { \
ret = glue(size, _compare_quiet)(src1, src2, \
&env->fp_status); \
} \
fsr = do_check_ieee_exceptions(env, GETPC()); \
switch (ret) { \
case float_relation_unordered: \
fsr |= (FSR_FCC1 | FSR_FCC0) << FS; \
break; \
case float_relation_less: \
fsr &= ~(FSR_FCC1 << FS); \
fsr |= FSR_FCC0 << FS; \
break; \
case float_relation_greater: \
fsr &= ~(FSR_FCC0 << FS); \
fsr |= FSR_FCC1 << FS; \
break; \
default: \
fsr &= ~((FSR_FCC1 | FSR_FCC0) << FS); \
break; \
} \
return fsr; \
}
GEN_FCMP_T(fcmps, float32, 0, 0);
GEN_FCMP_T(fcmpd, float64, 0, 0);
GEN_FCMP_T(fcmpes, float32, 0, 1);
GEN_FCMP_T(fcmped, float64, 0, 1);
GEN_FCMP(fcmpq, float128, QT0, QT1, 0, 0);
GEN_FCMP(fcmpeq, float128, QT0, QT1, 0, 1);
#ifdef TARGET_SPARC64
GEN_FCMP_T(fcmps_fcc1, float32, 22, 0);
GEN_FCMP_T(fcmpd_fcc1, float64, 22, 0);
GEN_FCMP(fcmpq_fcc1, float128, QT0, QT1, 22, 0);
GEN_FCMP_T(fcmps_fcc2, float32, 24, 0);
GEN_FCMP_T(fcmpd_fcc2, float64, 24, 0);
GEN_FCMP(fcmpq_fcc2, float128, QT0, QT1, 24, 0);
GEN_FCMP_T(fcmps_fcc3, float32, 26, 0);
GEN_FCMP_T(fcmpd_fcc3, float64, 26, 0);
GEN_FCMP(fcmpq_fcc3, float128, QT0, QT1, 26, 0);
GEN_FCMP_T(fcmpes_fcc1, float32, 22, 1);
GEN_FCMP_T(fcmped_fcc1, float64, 22, 1);
GEN_FCMP(fcmpeq_fcc1, float128, QT0, QT1, 22, 1);
GEN_FCMP_T(fcmpes_fcc2, float32, 24, 1);
GEN_FCMP_T(fcmped_fcc2, float64, 24, 1);
GEN_FCMP(fcmpeq_fcc2, float128, QT0, QT1, 24, 1);
GEN_FCMP_T(fcmpes_fcc3, float32, 26, 1);
GEN_FCMP_T(fcmped_fcc3, float64, 26, 1);
GEN_FCMP(fcmpeq_fcc3, float128, QT0, QT1, 26, 1);
#endif
#undef GEN_FCMP_T
#undef GEN_FCMP
static void set_fsr(CPUSPARCState *env, target_ulong fsr)
{
int rnd_mode;
switch (fsr & FSR_RD_MASK) {
case FSR_RD_NEAREST:
rnd_mode = float_round_nearest_even;
break;
default:
case FSR_RD_ZERO:
rnd_mode = float_round_to_zero;
break;
case FSR_RD_POS:
rnd_mode = float_round_up;
break;
case FSR_RD_NEG:
rnd_mode = float_round_down;
break;
}
set_float_rounding_mode(rnd_mode, &env->fp_status);
}
target_ulong helper_ldfsr(CPUSPARCState *env, target_ulong old_fsr,
uint32_t new_fsr)
{
old_fsr = (new_fsr & FSR_LDFSR_MASK) | (old_fsr & FSR_LDFSR_OLDMASK);
set_fsr(env, old_fsr);
return old_fsr;
}
#ifdef TARGET_SPARC64
target_ulong helper_ldxfsr(CPUSPARCState *env, target_ulong old_fsr,
uint64_t new_fsr)
{
old_fsr = (new_fsr & FSR_LDXFSR_MASK) | (old_fsr & FSR_LDXFSR_OLDMASK);
set_fsr(env, old_fsr);
return old_fsr;
}
#endif
|
