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20#include "qemu/osdep.h"
21#include "cpu.h"
22#include "exec/helper-proto.h"
23
24static uint32_t compute_all_flags(CPUSPARCState *env)
25{
26 return env->psr & PSR_ICC;
27}
28
29static uint32_t compute_C_flags(CPUSPARCState *env)
30{
31 return env->psr & PSR_CARRY;
32}
33
34static inline uint32_t get_NZ_icc(int32_t dst)
35{
36 uint32_t ret = 0;
37
38 if (dst == 0) {
39 ret = PSR_ZERO;
40 } else if (dst < 0) {
41 ret = PSR_NEG;
42 }
43 return ret;
44}
45
46#ifdef TARGET_SPARC64
47static uint32_t compute_all_flags_xcc(CPUSPARCState *env)
48{
49 return env->xcc & PSR_ICC;
50}
51
52static uint32_t compute_C_flags_xcc(CPUSPARCState *env)
53{
54 return env->xcc & PSR_CARRY;
55}
56
57static inline uint32_t get_NZ_xcc(target_long dst)
58{
59 uint32_t ret = 0;
60
61 if (!dst) {
62 ret = PSR_ZERO;
63 } else if (dst < 0) {
64 ret = PSR_NEG;
65 }
66 return ret;
67}
68#endif
69
70static inline uint32_t get_V_div_icc(target_ulong src2)
71{
72 uint32_t ret = 0;
73
74 if (src2 != 0) {
75 ret = PSR_OVF;
76 }
77 return ret;
78}
79
80static uint32_t compute_all_div(CPUSPARCState *env)
81{
82 uint32_t ret;
83
84 ret = get_NZ_icc(CC_DST);
85 ret |= get_V_div_icc(CC_SRC2);
86 return ret;
87}
88
89static uint32_t compute_C_div(CPUSPARCState *env)
90{
91 return 0;
92}
93
94static inline uint32_t get_C_add_icc(uint32_t dst, uint32_t src1)
95{
96 uint32_t ret = 0;
97
98 if (dst < src1) {
99 ret = PSR_CARRY;
100 }
101 return ret;
102}
103
104static inline uint32_t get_C_addx_icc(uint32_t dst, uint32_t src1,
105 uint32_t src2)
106{
107 uint32_t ret = 0;
108
109 if (((src1 & src2) | (~dst & (src1 | src2))) & (1U << 31)) {
110 ret = PSR_CARRY;
111 }
112 return ret;
113}
114
115static inline uint32_t get_V_add_icc(uint32_t dst, uint32_t src1,
116 uint32_t src2)
117{
118 uint32_t ret = 0;
119
120 if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1U << 31)) {
121 ret = PSR_OVF;
122 }
123 return ret;
124}
125
126#ifdef TARGET_SPARC64
127static inline uint32_t get_C_add_xcc(target_ulong dst, target_ulong src1)
128{
129 uint32_t ret = 0;
130
131 if (dst < src1) {
132 ret = PSR_CARRY;
133 }
134 return ret;
135}
136
137static inline uint32_t get_C_addx_xcc(target_ulong dst, target_ulong src1,
138 target_ulong src2)
139{
140 uint32_t ret = 0;
141
142 if (((src1 & src2) | (~dst & (src1 | src2))) & (1ULL << 63)) {
143 ret = PSR_CARRY;
144 }
145 return ret;
146}
147
148static inline uint32_t get_V_add_xcc(target_ulong dst, target_ulong src1,
149 target_ulong src2)
150{
151 uint32_t ret = 0;
152
153 if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63)) {
154 ret = PSR_OVF;
155 }
156 return ret;
157}
158
159static uint32_t compute_all_add_xcc(CPUSPARCState *env)
160{
161 uint32_t ret;
162
163 ret = get_NZ_xcc(CC_DST);
164 ret |= get_C_add_xcc(CC_DST, CC_SRC);
165 ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
166 return ret;
167}
168
169static uint32_t compute_C_add_xcc(CPUSPARCState *env)
170{
171 return get_C_add_xcc(CC_DST, CC_SRC);
172}
173#endif
174
175static uint32_t compute_all_add(CPUSPARCState *env)
176{
177 uint32_t ret;
178
179 ret = get_NZ_icc(CC_DST);
180 ret |= get_C_add_icc(CC_DST, CC_SRC);
181 ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
182 return ret;
183}
184
185static uint32_t compute_C_add(CPUSPARCState *env)
186{
187 return get_C_add_icc(CC_DST, CC_SRC);
188}
189
190#ifdef TARGET_SPARC64
191static uint32_t compute_all_addx_xcc(CPUSPARCState *env)
192{
193 uint32_t ret;
194
195 ret = get_NZ_xcc(CC_DST);
196 ret |= get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
197 ret |= get_V_add_xcc(CC_DST, CC_SRC, CC_SRC2);
198 return ret;
199}
200
201static uint32_t compute_C_addx_xcc(CPUSPARCState *env)
202{
203 uint32_t ret;
204
205 ret = get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
206 return ret;
207}
208#endif
209
210static uint32_t compute_all_addx(CPUSPARCState *env)
211{
212 uint32_t ret;
213
214 ret = get_NZ_icc(CC_DST);
215 ret |= get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
216 ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
217 return ret;
218}
219
220static uint32_t compute_C_addx(CPUSPARCState *env)
221{
222 uint32_t ret;
223
224 ret = get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
225 return ret;
226}
227
228static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)
229{
230 uint32_t ret = 0;
231
232 if ((src1 | src2) & 0x3) {
233 ret = PSR_OVF;
234 }
235 return ret;
236}
237
238static uint32_t compute_all_tadd(CPUSPARCState *env)
239{
240 uint32_t ret;
241
242 ret = get_NZ_icc(CC_DST);
243 ret |= get_C_add_icc(CC_DST, CC_SRC);
244 ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
245 ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
246 return ret;
247}
248
249static uint32_t compute_all_taddtv(CPUSPARCState *env)
250{
251 uint32_t ret;
252
253 ret = get_NZ_icc(CC_DST);
254 ret |= get_C_add_icc(CC_DST, CC_SRC);
255 return ret;
256}
257
258static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)
259{
260 uint32_t ret = 0;
261
262 if (src1 < src2) {
263 ret = PSR_CARRY;
264 }
265 return ret;
266}
267
268static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,
269 uint32_t src2)
270{
271 uint32_t ret = 0;
272
273 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {
274 ret = PSR_CARRY;
275 }
276 return ret;
277}
278
279static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,
280 uint32_t src2)
281{
282 uint32_t ret = 0;
283
284 if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {
285 ret = PSR_OVF;
286 }
287 return ret;
288}
289
290
291#ifdef TARGET_SPARC64
292static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
293{
294 uint32_t ret = 0;
295
296 if (src1 < src2) {
297 ret = PSR_CARRY;
298 }
299 return ret;
300}
301
302static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,
303 target_ulong src2)
304{
305 uint32_t ret = 0;
306
307 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {
308 ret = PSR_CARRY;
309 }
310 return ret;
311}
312
313static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
314 target_ulong src2)
315{
316 uint32_t ret = 0;
317
318 if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {
319 ret = PSR_OVF;
320 }
321 return ret;
322}
323
324static uint32_t compute_all_sub_xcc(CPUSPARCState *env)
325{
326 uint32_t ret;
327
328 ret = get_NZ_xcc(CC_DST);
329 ret |= get_C_sub_xcc(CC_SRC, CC_SRC2);
330 ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
331 return ret;
332}
333
334static uint32_t compute_C_sub_xcc(CPUSPARCState *env)
335{
336 return get_C_sub_xcc(CC_SRC, CC_SRC2);
337}
338#endif
339
340static uint32_t compute_all_sub(CPUSPARCState *env)
341{
342 uint32_t ret;
343
344 ret = get_NZ_icc(CC_DST);
345 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
346 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
347 return ret;
348}
349
350static uint32_t compute_C_sub(CPUSPARCState *env)
351{
352 return get_C_sub_icc(CC_SRC, CC_SRC2);
353}
354
355#ifdef TARGET_SPARC64
356static uint32_t compute_all_subx_xcc(CPUSPARCState *env)
357{
358 uint32_t ret;
359
360 ret = get_NZ_xcc(CC_DST);
361 ret |= get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
362 ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
363 return ret;
364}
365
366static uint32_t compute_C_subx_xcc(CPUSPARCState *env)
367{
368 uint32_t ret;
369
370 ret = get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
371 return ret;
372}
373#endif
374
375static uint32_t compute_all_subx(CPUSPARCState *env)
376{
377 uint32_t ret;
378
379 ret = get_NZ_icc(CC_DST);
380 ret |= get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
381 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
382 return ret;
383}
384
385static uint32_t compute_C_subx(CPUSPARCState *env)
386{
387 uint32_t ret;
388
389 ret = get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
390 return ret;
391}
392
393static uint32_t compute_all_tsub(CPUSPARCState *env)
394{
395 uint32_t ret;
396
397 ret = get_NZ_icc(CC_DST);
398 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
399 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
400 ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
401 return ret;
402}
403
404static uint32_t compute_all_tsubtv(CPUSPARCState *env)
405{
406 uint32_t ret;
407
408 ret = get_NZ_icc(CC_DST);
409 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
410 return ret;
411}
412
413static uint32_t compute_all_logic(CPUSPARCState *env)
414{
415 return get_NZ_icc(CC_DST);
416}
417
418static uint32_t compute_C_logic(CPUSPARCState *env)
419{
420 return 0;
421}
422
423#ifdef TARGET_SPARC64
424static uint32_t compute_all_logic_xcc(CPUSPARCState *env)
425{
426 return get_NZ_xcc(CC_DST);
427}
428#endif
429
430typedef struct CCTable {
431 uint32_t (*compute_all)(CPUSPARCState *env);
432 uint32_t (*compute_c)(CPUSPARCState *env);
433} CCTable;
434
435static const CCTable icc_table[CC_OP_NB] = {
436
437 [CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
438 [CC_OP_DIV] = { compute_all_div, compute_C_div },
439 [CC_OP_ADD] = { compute_all_add, compute_C_add },
440 [CC_OP_ADDX] = { compute_all_addx, compute_C_addx },
441 [CC_OP_TADD] = { compute_all_tadd, compute_C_add },
442 [CC_OP_TADDTV] = { compute_all_taddtv, compute_C_add },
443 [CC_OP_SUB] = { compute_all_sub, compute_C_sub },
444 [CC_OP_SUBX] = { compute_all_subx, compute_C_subx },
445 [CC_OP_TSUB] = { compute_all_tsub, compute_C_sub },
446 [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },
447 [CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },
448};
449
450#ifdef TARGET_SPARC64
451static const CCTable xcc_table[CC_OP_NB] = {
452
453 [CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
454 [CC_OP_DIV] = { compute_all_logic_xcc, compute_C_logic },
455 [CC_OP_ADD] = { compute_all_add_xcc, compute_C_add_xcc },
456 [CC_OP_ADDX] = { compute_all_addx_xcc, compute_C_addx_xcc },
457 [CC_OP_TADD] = { compute_all_add_xcc, compute_C_add_xcc },
458 [CC_OP_TADDTV] = { compute_all_add_xcc, compute_C_add_xcc },
459 [CC_OP_SUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
460 [CC_OP_SUBX] = { compute_all_subx_xcc, compute_C_subx_xcc },
461 [CC_OP_TSUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
462 [CC_OP_TSUBTV] = { compute_all_sub_xcc, compute_C_sub_xcc },
463 [CC_OP_LOGIC] = { compute_all_logic_xcc, compute_C_logic },
464};
465#endif
466
467void helper_compute_psr(CPUSPARCState *env)
468{
469 uint32_t new_psr;
470
471 new_psr = icc_table[CC_OP].compute_all(env);
472 env->psr = new_psr;
473#ifdef TARGET_SPARC64
474 new_psr = xcc_table[CC_OP].compute_all(env);
475 env->xcc = new_psr;
476#endif
477 CC_OP = CC_OP_FLAGS;
478}
479
480uint32_t helper_compute_C_icc(CPUSPARCState *env)
481{
482 uint32_t ret;
483
484 ret = icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;
485 return ret;
486}
487
