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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 return get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
204}
205#endif
206
207static uint32_t compute_all_addx(CPUSPARCState *env)
208{
209 uint32_t ret;
210
211 ret = get_NZ_icc(CC_DST);
212 ret |= get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
213 ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
214 return ret;
215}
216
217static uint32_t compute_C_addx(CPUSPARCState *env)
218{
219 return get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
220}
221
222static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)
223{
224 uint32_t ret = 0;
225
226 if ((src1 | src2) & 0x3) {
227 ret = PSR_OVF;
228 }
229 return ret;
230}
231
232static uint32_t compute_all_tadd(CPUSPARCState *env)
233{
234 uint32_t ret;
235
236 ret = get_NZ_icc(CC_DST);
237 ret |= get_C_add_icc(CC_DST, CC_SRC);
238 ret |= get_V_add_icc(CC_DST, CC_SRC, CC_SRC2);
239 ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
240 return ret;
241}
242
243static uint32_t compute_all_taddtv(CPUSPARCState *env)
244{
245 uint32_t ret;
246
247 ret = get_NZ_icc(CC_DST);
248 ret |= get_C_add_icc(CC_DST, CC_SRC);
249 return ret;
250}
251
252static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)
253{
254 uint32_t ret = 0;
255
256 if (src1 < src2) {
257 ret = PSR_CARRY;
258 }
259 return ret;
260}
261
262static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,
263 uint32_t src2)
264{
265 uint32_t ret = 0;
266
267 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {
268 ret = PSR_CARRY;
269 }
270 return ret;
271}
272
273static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,
274 uint32_t src2)
275{
276 uint32_t ret = 0;
277
278 if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {
279 ret = PSR_OVF;
280 }
281 return ret;
282}
283
284
285#ifdef TARGET_SPARC64
286static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
287{
288 uint32_t ret = 0;
289
290 if (src1 < src2) {
291 ret = PSR_CARRY;
292 }
293 return ret;
294}
295
296static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,
297 target_ulong src2)
298{
299 uint32_t ret = 0;
300
301 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {
302 ret = PSR_CARRY;
303 }
304 return ret;
305}
306
307static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
308 target_ulong src2)
309{
310 uint32_t ret = 0;
311
312 if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {
313 ret = PSR_OVF;
314 }
315 return ret;
316}
317
318static uint32_t compute_all_sub_xcc(CPUSPARCState *env)
319{
320 uint32_t ret;
321
322 ret = get_NZ_xcc(CC_DST);
323 ret |= get_C_sub_xcc(CC_SRC, CC_SRC2);
324 ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
325 return ret;
326}
327
328static uint32_t compute_C_sub_xcc(CPUSPARCState *env)
329{
330 return get_C_sub_xcc(CC_SRC, CC_SRC2);
331}
332#endif
333
334static uint32_t compute_all_sub(CPUSPARCState *env)
335{
336 uint32_t ret;
337
338 ret = get_NZ_icc(CC_DST);
339 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
340 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
341 return ret;
342}
343
344static uint32_t compute_C_sub(CPUSPARCState *env)
345{
346 return get_C_sub_icc(CC_SRC, CC_SRC2);
347}
348
349#ifdef TARGET_SPARC64
350static uint32_t compute_all_subx_xcc(CPUSPARCState *env)
351{
352 uint32_t ret;
353
354 ret = get_NZ_xcc(CC_DST);
355 ret |= get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
356 ret |= get_V_sub_xcc(CC_DST, CC_SRC, CC_SRC2);
357 return ret;
358}
359
360static uint32_t compute_C_subx_xcc(CPUSPARCState *env)
361{
362 return get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
363}
364#endif
365
366static uint32_t compute_all_subx(CPUSPARCState *env)
367{
368 uint32_t ret;
369
370 ret = get_NZ_icc(CC_DST);
371 ret |= get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
372 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
373 return ret;
374}
375
376static uint32_t compute_C_subx(CPUSPARCState *env)
377{
378 return get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
379}
380
381static uint32_t compute_all_tsub(CPUSPARCState *env)
382{
383 uint32_t ret;
384
385 ret = get_NZ_icc(CC_DST);
386 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
387 ret |= get_V_sub_icc(CC_DST, CC_SRC, CC_SRC2);
388 ret |= get_V_tag_icc(CC_SRC, CC_SRC2);
389 return ret;
390}
391
392static uint32_t compute_all_tsubtv(CPUSPARCState *env)
393{
394 uint32_t ret;
395
396 ret = get_NZ_icc(CC_DST);
397 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
398 return ret;
399}
400
401static uint32_t compute_all_logic(CPUSPARCState *env)
402{
403 return get_NZ_icc(CC_DST);
404}
405
406static uint32_t compute_C_logic(CPUSPARCState *env)
407{
408 return 0;
409}
410
411#ifdef TARGET_SPARC64
412static uint32_t compute_all_logic_xcc(CPUSPARCState *env)
413{
414 return get_NZ_xcc(CC_DST);
415}
416#endif
417
418typedef struct CCTable {
419 uint32_t (*compute_all)(CPUSPARCState *env);
420 uint32_t (*compute_c)(CPUSPARCState *env);
421} CCTable;
422
423static const CCTable icc_table[CC_OP_NB] = {
424
425 [CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
426 [CC_OP_DIV] = { compute_all_div, compute_C_div },
427 [CC_OP_ADD] = { compute_all_add, compute_C_add },
428 [CC_OP_ADDX] = { compute_all_addx, compute_C_addx },
429 [CC_OP_TADD] = { compute_all_tadd, compute_C_add },
430 [CC_OP_TADDTV] = { compute_all_taddtv, compute_C_add },
431 [CC_OP_SUB] = { compute_all_sub, compute_C_sub },
432 [CC_OP_SUBX] = { compute_all_subx, compute_C_subx },
433 [CC_OP_TSUB] = { compute_all_tsub, compute_C_sub },
434 [CC_OP_TSUBTV] = { compute_all_tsubtv, compute_C_sub },
435 [CC_OP_LOGIC] = { compute_all_logic, compute_C_logic },
436};
437
438#ifdef TARGET_SPARC64
439static const CCTable xcc_table[CC_OP_NB] = {
440
441 [CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
442 [CC_OP_DIV] = { compute_all_logic_xcc, compute_C_logic },
443 [CC_OP_ADD] = { compute_all_add_xcc, compute_C_add_xcc },
444 [CC_OP_ADDX] = { compute_all_addx_xcc, compute_C_addx_xcc },
445 [CC_OP_TADD] = { compute_all_add_xcc, compute_C_add_xcc },
446 [CC_OP_TADDTV] = { compute_all_add_xcc, compute_C_add_xcc },
447 [CC_OP_SUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
448 [CC_OP_SUBX] = { compute_all_subx_xcc, compute_C_subx_xcc },
449 [CC_OP_TSUB] = { compute_all_sub_xcc, compute_C_sub_xcc },
450 [CC_OP_TSUBTV] = { compute_all_sub_xcc, compute_C_sub_xcc },
451 [CC_OP_LOGIC] = { compute_all_logic_xcc, compute_C_logic },
452};
453#endif
454
455void helper_compute_psr(CPUSPARCState *env)
456{
457 uint32_t new_psr;
458
459 new_psr = icc_table[CC_OP].compute_all(env);
460 env->psr = new_psr;
461#ifdef TARGET_SPARC64
462 new_psr = xcc_table[CC_OP].compute_all(env);
463 env->xcc = new_psr;
464#endif
465 CC_OP = CC_OP_FLAGS;
466}
467
468uint32_t helper_compute_C_icc(CPUSPARCState *env)
469{
470 return icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;
471}
472
