2 * Helpers for lazy condition code handling
4 * Copyright (c) 2003-2005 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "exec/helper-proto.h"
24 static uint32_t compute_all_flags(CPUSPARCState *env)
26 return env->psr & PSR_ICC;
29 static uint32_t compute_C_flags(CPUSPARCState *env)
31 return env->psr & PSR_CARRY;
34 static inline uint32_t get_NZ_icc(int32_t dst)
47 static uint32_t compute_all_flags_xcc(CPUSPARCState *env)
49 return env->xcc & PSR_ICC;
52 static uint32_t compute_C_flags_xcc(CPUSPARCState *env)
54 return env->xcc & PSR_CARRY;
57 static inline uint32_t get_NZ_xcc(target_long dst)
70 static inline uint32_t get_V_div_icc(target_ulong src2)
80 static uint32_t compute_all_div(CPUSPARCState *env)
84 ret = get_NZ_icc(CC_DST);
85 ret |= get_V_div_icc(CC_SRC2);
89 static uint32_t compute_C_div(CPUSPARCState *env)
94 static inline uint32_t get_C_add_icc(uint32_t dst, uint32_t src1)
104 static inline uint32_t get_C_addx_icc(uint32_t dst, uint32_t src1,
109 if (((src1 & src2) | (~dst & (src1 | src2))) & (1U << 31)) {
115 static inline uint32_t get_V_add_icc(uint32_t dst, uint32_t src1,
120 if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1U << 31)) {
126 #ifdef TARGET_SPARC64
127 static inline uint32_t get_C_add_xcc(target_ulong dst, target_ulong src1)
137 static inline uint32_t get_C_addx_xcc(target_ulong dst, target_ulong src1,
142 if (((src1 & src2) | (~dst & (src1 | src2))) & (1ULL << 63)) {
148 static inline uint32_t get_V_add_xcc(target_ulong dst, target_ulong src1,
153 if (((src1 ^ src2 ^ -1) & (src1 ^ dst)) & (1ULL << 63)) {
159 static uint32_t compute_all_add_xcc(CPUSPARCState *env)
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);
169 static uint32_t compute_C_add_xcc(CPUSPARCState *env)
171 return get_C_add_xcc(CC_DST, CC_SRC);
175 static uint32_t compute_all_add(CPUSPARCState *env)
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);
185 static uint32_t compute_C_add(CPUSPARCState *env)
187 return get_C_add_icc(CC_DST, CC_SRC);
190 #ifdef TARGET_SPARC64
191 static uint32_t compute_all_addx_xcc(CPUSPARCState *env)
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);
201 static uint32_t compute_C_addx_xcc(CPUSPARCState *env)
203 return get_C_addx_xcc(CC_DST, CC_SRC, CC_SRC2);
207 static uint32_t compute_all_addx(CPUSPARCState *env)
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);
217 static uint32_t compute_C_addx(CPUSPARCState *env)
219 return get_C_addx_icc(CC_DST, CC_SRC, CC_SRC2);
222 static inline uint32_t get_V_tag_icc(target_ulong src1, target_ulong src2)
226 if ((src1 | src2) & 0x3) {
232 static uint32_t compute_all_tadd(CPUSPARCState *env)
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);
243 static uint32_t compute_all_taddtv(CPUSPARCState *env)
247 ret = get_NZ_icc(CC_DST);
248 ret |= get_C_add_icc(CC_DST, CC_SRC);
252 static inline uint32_t get_C_sub_icc(uint32_t src1, uint32_t src2)
262 static inline uint32_t get_C_subx_icc(uint32_t dst, uint32_t src1,
267 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1U << 31)) {
273 static inline uint32_t get_V_sub_icc(uint32_t dst, uint32_t src1,
278 if (((src1 ^ src2) & (src1 ^ dst)) & (1U << 31)) {
285 #ifdef TARGET_SPARC64
286 static inline uint32_t get_C_sub_xcc(target_ulong src1, target_ulong src2)
296 static inline uint32_t get_C_subx_xcc(target_ulong dst, target_ulong src1,
301 if (((~src1 & src2) | (dst & (~src1 | src2))) & (1ULL << 63)) {
307 static inline uint32_t get_V_sub_xcc(target_ulong dst, target_ulong src1,
312 if (((src1 ^ src2) & (src1 ^ dst)) & (1ULL << 63)) {
318 static uint32_t compute_all_sub_xcc(CPUSPARCState *env)
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);
328 static uint32_t compute_C_sub_xcc(CPUSPARCState *env)
330 return get_C_sub_xcc(CC_SRC, CC_SRC2);
334 static uint32_t compute_all_sub(CPUSPARCState *env)
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);
344 static uint32_t compute_C_sub(CPUSPARCState *env)
346 return get_C_sub_icc(CC_SRC, CC_SRC2);
349 #ifdef TARGET_SPARC64
350 static uint32_t compute_all_subx_xcc(CPUSPARCState *env)
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);
360 static uint32_t compute_C_subx_xcc(CPUSPARCState *env)
362 return get_C_subx_xcc(CC_DST, CC_SRC, CC_SRC2);
366 static uint32_t compute_all_subx(CPUSPARCState *env)
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);
376 static uint32_t compute_C_subx(CPUSPARCState *env)
378 return get_C_subx_icc(CC_DST, CC_SRC, CC_SRC2);
381 static uint32_t compute_all_tsub(CPUSPARCState *env)
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);
392 static uint32_t compute_all_tsubtv(CPUSPARCState *env)
396 ret = get_NZ_icc(CC_DST);
397 ret |= get_C_sub_icc(CC_SRC, CC_SRC2);
401 static uint32_t compute_all_logic(CPUSPARCState *env)
403 return get_NZ_icc(CC_DST);
406 static uint32_t compute_C_logic(CPUSPARCState *env)
411 #ifdef TARGET_SPARC64
412 static uint32_t compute_all_logic_xcc(CPUSPARCState *env)
414 return get_NZ_xcc(CC_DST);
418 typedef struct CCTable {
419 uint32_t (*compute_all)(CPUSPARCState *env); /* return all the flags */
420 uint32_t (*compute_c)(CPUSPARCState *env); /* return the C flag */
423 static const CCTable icc_table[CC_OP_NB] = {
424 /* CC_OP_DYNAMIC should never happen */
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 },
438 #ifdef TARGET_SPARC64
439 static const CCTable xcc_table[CC_OP_NB] = {
440 /* CC_OP_DYNAMIC should never happen */
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 },
455 void helper_compute_psr(CPUSPARCState *env)
459 new_psr = icc_table[CC_OP].compute_all(env);
461 #ifdef TARGET_SPARC64
462 new_psr = xcc_table[CC_OP].compute_all(env);
468 uint32_t helper_compute_C_icc(CPUSPARCState *env)
470 return icc_table[CC_OP].compute_c(env) >> PSR_CARRY_SHIFT;