root / target-cris / op_helper.c @ 877d8ad7
History | View | Annotate | Download (12.5 kB)
| 1 |
/*
|
|---|---|
| 2 |
* CRIS helper routines
|
| 3 |
*
|
| 4 |
* Copyright (c) 2007 AXIS Communications
|
| 5 |
* Written by Edgar E. Iglesias
|
| 6 |
*
|
| 7 |
* This library is free software; you can redistribute it and/or
|
| 8 |
* modify it under the terms of the GNU Lesser General Public
|
| 9 |
* License as published by the Free Software Foundation; either
|
| 10 |
* version 2 of the License, or (at your option) any later version.
|
| 11 |
*
|
| 12 |
* This library is distributed in the hope that it will be useful,
|
| 13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 15 |
* Lesser General Public License for more details.
|
| 16 |
*
|
| 17 |
* You should have received a copy of the GNU Lesser General Public
|
| 18 |
* License along with this library; if not, write to the Free Software
|
| 19 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 20 |
*/
|
| 21 |
|
| 22 |
#include <assert.h> |
| 23 |
#include "exec.h" |
| 24 |
#include "mmu.h" |
| 25 |
#include "helper.h" |
| 26 |
|
| 27 |
#define D(x)
|
| 28 |
|
| 29 |
#if !defined(CONFIG_USER_ONLY)
|
| 30 |
|
| 31 |
#define MMUSUFFIX _mmu
|
| 32 |
|
| 33 |
#define SHIFT 0 |
| 34 |
#include "softmmu_template.h" |
| 35 |
|
| 36 |
#define SHIFT 1 |
| 37 |
#include "softmmu_template.h" |
| 38 |
|
| 39 |
#define SHIFT 2 |
| 40 |
#include "softmmu_template.h" |
| 41 |
|
| 42 |
#define SHIFT 3 |
| 43 |
#include "softmmu_template.h" |
| 44 |
|
| 45 |
/* Try to fill the TLB and return an exception if error. If retaddr is
|
| 46 |
NULL, it means that the function was called in C code (i.e. not
|
| 47 |
from generated code or from helper.c) */
|
| 48 |
/* XXX: fix it to restore all registers */
|
| 49 |
void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr) |
| 50 |
{
|
| 51 |
TranslationBlock *tb; |
| 52 |
CPUState *saved_env; |
| 53 |
unsigned long pc; |
| 54 |
int ret;
|
| 55 |
|
| 56 |
/* XXX: hack to restore env in all cases, even if not called from
|
| 57 |
generated code */
|
| 58 |
saved_env = env; |
| 59 |
env = cpu_single_env; |
| 60 |
|
| 61 |
D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__,
|
| 62 |
env->pc, env->debug1, retaddr)); |
| 63 |
ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
|
| 64 |
if (__builtin_expect(ret, 0)) { |
| 65 |
if (retaddr) {
|
| 66 |
/* now we have a real cpu fault */
|
| 67 |
pc = (unsigned long)retaddr; |
| 68 |
tb = tb_find_pc(pc); |
| 69 |
if (tb) {
|
| 70 |
/* the PC is inside the translated code. It means that we have
|
| 71 |
a virtual CPU fault */
|
| 72 |
cpu_restore_state(tb, env, pc, NULL);
|
| 73 |
|
| 74 |
/* Evaluate flags after retranslation. */
|
| 75 |
helper_top_evaluate_flags(); |
| 76 |
} |
| 77 |
} |
| 78 |
cpu_loop_exit(); |
| 79 |
} |
| 80 |
env = saved_env; |
| 81 |
} |
| 82 |
|
| 83 |
#endif
|
| 84 |
|
| 85 |
void helper_raise_exception(uint32_t index)
|
| 86 |
{
|
| 87 |
env->exception_index = index; |
| 88 |
cpu_loop_exit(); |
| 89 |
} |
| 90 |
|
| 91 |
void helper_tlb_flush_pid(uint32_t pid)
|
| 92 |
{
|
| 93 |
#if !defined(CONFIG_USER_ONLY)
|
| 94 |
cris_mmu_flush_pid(env, pid); |
| 95 |
#endif
|
| 96 |
} |
| 97 |
|
| 98 |
void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
|
| 99 |
{
|
| 100 |
(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
|
| 101 |
} |
| 102 |
|
| 103 |
void helper_dummy(void) |
| 104 |
{
|
| 105 |
|
| 106 |
} |
| 107 |
|
| 108 |
/* Used by the tlb decoder. */
|
| 109 |
#define EXTRACT_FIELD(src, start, end) \
|
| 110 |
(((src) >> start) & ((1 << (end - start + 1)) - 1)) |
| 111 |
|
| 112 |
void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
|
| 113 |
{
|
| 114 |
uint32_t srs; |
| 115 |
srs = env->pregs[PR_SRS]; |
| 116 |
srs &= 3;
|
| 117 |
env->sregs[srs][sreg] = env->regs[reg]; |
| 118 |
|
| 119 |
#if !defined(CONFIG_USER_ONLY)
|
| 120 |
if (srs == 1 || srs == 2) { |
| 121 |
if (sreg == 6) { |
| 122 |
/* Writes to tlb-hi write to mm_cause as a side
|
| 123 |
effect. */
|
| 124 |
env->sregs[SFR_RW_MM_TLB_HI] = T0; |
| 125 |
env->sregs[SFR_R_MM_CAUSE] = T0; |
| 126 |
} |
| 127 |
else if (sreg == 5) { |
| 128 |
uint32_t set; |
| 129 |
uint32_t idx; |
| 130 |
uint32_t lo, hi; |
| 131 |
uint32_t vaddr; |
| 132 |
int tlb_v;
|
| 133 |
|
| 134 |
idx = set = env->sregs[SFR_RW_MM_TLB_SEL]; |
| 135 |
set >>= 4;
|
| 136 |
set &= 3;
|
| 137 |
|
| 138 |
idx &= 15;
|
| 139 |
/* We've just made a write to tlb_lo. */
|
| 140 |
lo = env->sregs[SFR_RW_MM_TLB_LO]; |
| 141 |
/* Writes are done via r_mm_cause. */
|
| 142 |
hi = env->sregs[SFR_R_MM_CAUSE]; |
| 143 |
|
| 144 |
vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
|
| 145 |
13, 31); |
| 146 |
vaddr <<= TARGET_PAGE_BITS; |
| 147 |
tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
|
| 148 |
3, 3); |
| 149 |
env->tlbsets[srs - 1][set][idx].lo = lo;
|
| 150 |
env->tlbsets[srs - 1][set][idx].hi = hi;
|
| 151 |
|
| 152 |
D(fprintf(logfile, |
| 153 |
"tlb flush vaddr=%x v=%d pc=%x\n",
|
| 154 |
vaddr, tlb_v, env->pc)); |
| 155 |
tlb_flush_page(env, vaddr); |
| 156 |
} |
| 157 |
} |
| 158 |
#endif
|
| 159 |
} |
| 160 |
|
| 161 |
void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
|
| 162 |
{
|
| 163 |
uint32_t srs; |
| 164 |
env->pregs[PR_SRS] &= 3;
|
| 165 |
srs = env->pregs[PR_SRS]; |
| 166 |
|
| 167 |
#if !defined(CONFIG_USER_ONLY)
|
| 168 |
if (srs == 1 || srs == 2) |
| 169 |
{
|
| 170 |
uint32_t set; |
| 171 |
uint32_t idx; |
| 172 |
uint32_t lo, hi; |
| 173 |
|
| 174 |
idx = set = env->sregs[SFR_RW_MM_TLB_SEL]; |
| 175 |
set >>= 4;
|
| 176 |
set &= 3;
|
| 177 |
idx &= 15;
|
| 178 |
|
| 179 |
/* Update the mirror regs. */
|
| 180 |
hi = env->tlbsets[srs - 1][set][idx].hi;
|
| 181 |
lo = env->tlbsets[srs - 1][set][idx].lo;
|
| 182 |
env->sregs[SFR_RW_MM_TLB_HI] = hi; |
| 183 |
env->sregs[SFR_RW_MM_TLB_LO] = lo; |
| 184 |
} |
| 185 |
#endif
|
| 186 |
env->regs[reg] = env->sregs[srs][sreg]; |
| 187 |
RETURN(); |
| 188 |
} |
| 189 |
|
| 190 |
static void cris_ccs_rshift(CPUState *env) |
| 191 |
{
|
| 192 |
uint32_t ccs; |
| 193 |
|
| 194 |
/* Apply the ccs shift. */
|
| 195 |
ccs = env->pregs[PR_CCS]; |
| 196 |
ccs = (ccs & 0xc0000000) | ((ccs & 0x0fffffff) >> 10); |
| 197 |
if (ccs & U_FLAG)
|
| 198 |
{
|
| 199 |
/* Enter user mode. */
|
| 200 |
env->ksp = env->regs[R_SP]; |
| 201 |
env->regs[R_SP] = env->pregs[PR_USP]; |
| 202 |
} |
| 203 |
|
| 204 |
env->pregs[PR_CCS] = ccs; |
| 205 |
} |
| 206 |
|
| 207 |
void helper_rfe(void) |
| 208 |
{
|
| 209 |
int rflag = env->pregs[PR_CCS] & R_FLAG;
|
| 210 |
|
| 211 |
D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
|
| 212 |
env->pregs[PR_ERP], env->pregs[PR_PID], |
| 213 |
env->pregs[PR_CCS], |
| 214 |
env->btarget)); |
| 215 |
|
| 216 |
cris_ccs_rshift(env); |
| 217 |
|
| 218 |
/* RFE sets the P_FLAG only if the R_FLAG is not set. */
|
| 219 |
if (!rflag)
|
| 220 |
env->pregs[PR_CCS] |= P_FLAG; |
| 221 |
} |
| 222 |
|
| 223 |
void helper_rfn(void) |
| 224 |
{
|
| 225 |
int rflag = env->pregs[PR_CCS] & R_FLAG;
|
| 226 |
|
| 227 |
D(fprintf(logfile, "rfn: erp=%x pid=%x ccs=%x btarget=%x\n",
|
| 228 |
env->pregs[PR_ERP], env->pregs[PR_PID], |
| 229 |
env->pregs[PR_CCS], |
| 230 |
env->btarget)); |
| 231 |
|
| 232 |
cris_ccs_rshift(env); |
| 233 |
|
| 234 |
/* Set the P_FLAG only if the R_FLAG is not set. */
|
| 235 |
if (!rflag)
|
| 236 |
env->pregs[PR_CCS] |= P_FLAG; |
| 237 |
|
| 238 |
/* Always set the M flag. */
|
| 239 |
env->pregs[PR_CCS] |= M_FLAG; |
| 240 |
} |
| 241 |
|
| 242 |
void helper_store(uint32_t a0)
|
| 243 |
{
|
| 244 |
if (env->pregs[PR_CCS] & P_FLAG )
|
| 245 |
{
|
| 246 |
cpu_abort(env, "cond_store_failed! pc=%x a0=%x\n",
|
| 247 |
env->pc, a0); |
| 248 |
} |
| 249 |
} |
| 250 |
|
| 251 |
void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec, |
| 252 |
int is_asi)
|
| 253 |
{
|
| 254 |
D(printf("%s addr=%x w=%d ex=%d asi=%d\n",
|
| 255 |
__func__, addr, is_write, is_exec, is_asi)); |
| 256 |
} |
| 257 |
|
| 258 |
static void evaluate_flags_writeback(uint32_t flags) |
| 259 |
{
|
| 260 |
int x;
|
| 261 |
|
| 262 |
/* Extended arithmetics, leave the z flag alone. */
|
| 263 |
x = env->cc_x; |
| 264 |
if ((x || env->cc_op == CC_OP_ADDC)
|
| 265 |
&& flags & Z_FLAG) |
| 266 |
env->cc_mask &= ~Z_FLAG; |
| 267 |
|
| 268 |
/* all insn clear the x-flag except setf or clrf. */
|
| 269 |
env->pregs[PR_CCS] &= ~(env->cc_mask | X_FLAG); |
| 270 |
flags &= env->cc_mask; |
| 271 |
env->pregs[PR_CCS] |= flags; |
| 272 |
} |
| 273 |
|
| 274 |
void helper_evaluate_flags_muls(void) |
| 275 |
{
|
| 276 |
uint32_t src; |
| 277 |
uint32_t dst; |
| 278 |
uint32_t res; |
| 279 |
uint32_t flags = 0;
|
| 280 |
int64_t tmp; |
| 281 |
int32_t mof; |
| 282 |
int dneg;
|
| 283 |
|
| 284 |
src = env->cc_src; |
| 285 |
dst = env->cc_dest; |
| 286 |
res = env->cc_result; |
| 287 |
|
| 288 |
dneg = ((int32_t)res) < 0;
|
| 289 |
|
| 290 |
mof = env->pregs[PR_MOF]; |
| 291 |
tmp = mof; |
| 292 |
tmp <<= 32;
|
| 293 |
tmp |= res; |
| 294 |
if (tmp == 0) |
| 295 |
flags |= Z_FLAG; |
| 296 |
else if (tmp < 0) |
| 297 |
flags |= N_FLAG; |
| 298 |
if ((dneg && mof != -1) |
| 299 |
|| (!dneg && mof != 0))
|
| 300 |
flags |= V_FLAG; |
| 301 |
evaluate_flags_writeback(flags); |
| 302 |
} |
| 303 |
|
| 304 |
void helper_evaluate_flags_mulu(void) |
| 305 |
{
|
| 306 |
uint32_t src; |
| 307 |
uint32_t dst; |
| 308 |
uint32_t res; |
| 309 |
uint32_t flags = 0;
|
| 310 |
uint64_t tmp; |
| 311 |
uint32_t mof; |
| 312 |
|
| 313 |
src = env->cc_src; |
| 314 |
dst = env->cc_dest; |
| 315 |
res = env->cc_result; |
| 316 |
|
| 317 |
mof = env->pregs[PR_MOF]; |
| 318 |
tmp = mof; |
| 319 |
tmp <<= 32;
|
| 320 |
tmp |= res; |
| 321 |
if (tmp == 0) |
| 322 |
flags |= Z_FLAG; |
| 323 |
else if (tmp >> 63) |
| 324 |
flags |= N_FLAG; |
| 325 |
if (mof)
|
| 326 |
flags |= V_FLAG; |
| 327 |
|
| 328 |
evaluate_flags_writeback(flags); |
| 329 |
} |
| 330 |
|
| 331 |
void helper_evaluate_flags_mcp(void) |
| 332 |
{
|
| 333 |
uint32_t src; |
| 334 |
uint32_t dst; |
| 335 |
uint32_t res; |
| 336 |
uint32_t flags = 0;
|
| 337 |
|
| 338 |
src = env->cc_src; |
| 339 |
dst = env->cc_dest; |
| 340 |
res = env->cc_result; |
| 341 |
|
| 342 |
if ((res & 0x80000000L) != 0L) |
| 343 |
{
|
| 344 |
flags |= N_FLAG; |
| 345 |
if (((src & 0x80000000L) == 0L) |
| 346 |
&& ((dst & 0x80000000L) == 0L)) |
| 347 |
{
|
| 348 |
flags |= V_FLAG; |
| 349 |
} |
| 350 |
else if (((src & 0x80000000L) != 0L) && |
| 351 |
((dst & 0x80000000L) != 0L)) |
| 352 |
{
|
| 353 |
flags |= R_FLAG; |
| 354 |
} |
| 355 |
} |
| 356 |
else
|
| 357 |
{
|
| 358 |
if (res == 0L) |
| 359 |
flags |= Z_FLAG; |
| 360 |
if (((src & 0x80000000L) != 0L) |
| 361 |
&& ((dst & 0x80000000L) != 0L)) |
| 362 |
flags |= V_FLAG; |
| 363 |
if ((dst & 0x80000000L) != 0L |
| 364 |
|| (src & 0x80000000L) != 0L) |
| 365 |
flags |= R_FLAG; |
| 366 |
} |
| 367 |
|
| 368 |
evaluate_flags_writeback(flags); |
| 369 |
} |
| 370 |
|
| 371 |
void helper_evaluate_flags_alu_4(void) |
| 372 |
{
|
| 373 |
uint32_t src; |
| 374 |
uint32_t dst; |
| 375 |
uint32_t res; |
| 376 |
uint32_t flags = 0;
|
| 377 |
|
| 378 |
src = env->cc_src; |
| 379 |
dst = env->cc_dest; |
| 380 |
|
| 381 |
/* Reconstruct the result. */
|
| 382 |
switch (env->cc_op)
|
| 383 |
{
|
| 384 |
case CC_OP_SUB:
|
| 385 |
res = dst - src; |
| 386 |
break;
|
| 387 |
case CC_OP_ADD:
|
| 388 |
res = dst + src; |
| 389 |
break;
|
| 390 |
default:
|
| 391 |
res = env->cc_result; |
| 392 |
break;
|
| 393 |
} |
| 394 |
|
| 395 |
if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
|
| 396 |
src = ~src; |
| 397 |
|
| 398 |
if ((res & 0x80000000L) != 0L) |
| 399 |
{
|
| 400 |
flags |= N_FLAG; |
| 401 |
if (((src & 0x80000000L) == 0L) |
| 402 |
&& ((dst & 0x80000000L) == 0L)) |
| 403 |
{
|
| 404 |
flags |= V_FLAG; |
| 405 |
} |
| 406 |
else if (((src & 0x80000000L) != 0L) && |
| 407 |
((dst & 0x80000000L) != 0L)) |
| 408 |
{
|
| 409 |
flags |= C_FLAG; |
| 410 |
} |
| 411 |
} |
| 412 |
else
|
| 413 |
{
|
| 414 |
if (res == 0L) |
| 415 |
flags |= Z_FLAG; |
| 416 |
if (((src & 0x80000000L) != 0L) |
| 417 |
&& ((dst & 0x80000000L) != 0L)) |
| 418 |
flags |= V_FLAG; |
| 419 |
if ((dst & 0x80000000L) != 0L |
| 420 |
|| (src & 0x80000000L) != 0L) |
| 421 |
flags |= C_FLAG; |
| 422 |
} |
| 423 |
|
| 424 |
if (env->cc_op == CC_OP_SUB
|
| 425 |
|| env->cc_op == CC_OP_CMP) {
|
| 426 |
flags ^= C_FLAG; |
| 427 |
} |
| 428 |
evaluate_flags_writeback(flags); |
| 429 |
} |
| 430 |
|
| 431 |
void helper_evaluate_flags_move_4 (void) |
| 432 |
{
|
| 433 |
uint32_t res; |
| 434 |
uint32_t flags = 0;
|
| 435 |
|
| 436 |
res = env->cc_result; |
| 437 |
|
| 438 |
if ((int32_t)res < 0) |
| 439 |
flags |= N_FLAG; |
| 440 |
else if (res == 0L) |
| 441 |
flags |= Z_FLAG; |
| 442 |
|
| 443 |
evaluate_flags_writeback(flags); |
| 444 |
} |
| 445 |
void helper_evaluate_flags_move_2 (void) |
| 446 |
{
|
| 447 |
uint32_t src; |
| 448 |
uint32_t flags = 0;
|
| 449 |
uint16_t res; |
| 450 |
|
| 451 |
src = env->cc_src; |
| 452 |
res = env->cc_result; |
| 453 |
|
| 454 |
if ((int16_t)res < 0L) |
| 455 |
flags |= N_FLAG; |
| 456 |
else if (res == 0) |
| 457 |
flags |= Z_FLAG; |
| 458 |
|
| 459 |
evaluate_flags_writeback(flags); |
| 460 |
} |
| 461 |
|
| 462 |
/* TODO: This is expensive. We could split things up and only evaluate part of
|
| 463 |
CCR on a need to know basis. For now, we simply re-evaluate everything. */
|
| 464 |
void helper_evaluate_flags (void) |
| 465 |
{
|
| 466 |
uint32_t src; |
| 467 |
uint32_t dst; |
| 468 |
uint32_t res; |
| 469 |
uint32_t flags = 0;
|
| 470 |
|
| 471 |
src = env->cc_src; |
| 472 |
dst = env->cc_dest; |
| 473 |
res = env->cc_result; |
| 474 |
|
| 475 |
if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
|
| 476 |
src = ~src; |
| 477 |
|
| 478 |
/* Now, evaluate the flags. This stuff is based on
|
| 479 |
Per Zander's CRISv10 simulator. */
|
| 480 |
switch (env->cc_size)
|
| 481 |
{
|
| 482 |
case 1: |
| 483 |
if ((res & 0x80L) != 0L) |
| 484 |
{
|
| 485 |
flags |= N_FLAG; |
| 486 |
if (((src & 0x80L) == 0L) |
| 487 |
&& ((dst & 0x80L) == 0L)) |
| 488 |
{
|
| 489 |
flags |= V_FLAG; |
| 490 |
} |
| 491 |
else if (((src & 0x80L) != 0L) |
| 492 |
&& ((dst & 0x80L) != 0L)) |
| 493 |
{
|
| 494 |
flags |= C_FLAG; |
| 495 |
} |
| 496 |
} |
| 497 |
else
|
| 498 |
{
|
| 499 |
if ((res & 0xFFL) == 0L) |
| 500 |
{
|
| 501 |
flags |= Z_FLAG; |
| 502 |
} |
| 503 |
if (((src & 0x80L) != 0L) |
| 504 |
&& ((dst & 0x80L) != 0L)) |
| 505 |
{
|
| 506 |
flags |= V_FLAG; |
| 507 |
} |
| 508 |
if ((dst & 0x80L) != 0L |
| 509 |
|| (src & 0x80L) != 0L) |
| 510 |
{
|
| 511 |
flags |= C_FLAG; |
| 512 |
} |
| 513 |
} |
| 514 |
break;
|
| 515 |
case 2: |
| 516 |
if ((res & 0x8000L) != 0L) |
| 517 |
{
|
| 518 |
flags |= N_FLAG; |
| 519 |
if (((src & 0x8000L) == 0L) |
| 520 |
&& ((dst & 0x8000L) == 0L)) |
| 521 |
{
|
| 522 |
flags |= V_FLAG; |
| 523 |
} |
| 524 |
else if (((src & 0x8000L) != 0L) |
| 525 |
&& ((dst & 0x8000L) != 0L)) |
| 526 |
{
|
| 527 |
flags |= C_FLAG; |
| 528 |
} |
| 529 |
} |
| 530 |
else
|
| 531 |
{
|
| 532 |
if ((res & 0xFFFFL) == 0L) |
| 533 |
{
|
| 534 |
flags |= Z_FLAG; |
| 535 |
} |
| 536 |
if (((src & 0x8000L) != 0L) |
| 537 |
&& ((dst & 0x8000L) != 0L)) |
| 538 |
{
|
| 539 |
flags |= V_FLAG; |
| 540 |
} |
| 541 |
if ((dst & 0x8000L) != 0L |
| 542 |
|| (src & 0x8000L) != 0L) |
| 543 |
{
|
| 544 |
flags |= C_FLAG; |
| 545 |
} |
| 546 |
} |
| 547 |
break;
|
| 548 |
case 4: |
| 549 |
if ((res & 0x80000000L) != 0L) |
| 550 |
{
|
| 551 |
flags |= N_FLAG; |
| 552 |
if (((src & 0x80000000L) == 0L) |
| 553 |
&& ((dst & 0x80000000L) == 0L)) |
| 554 |
{
|
| 555 |
flags |= V_FLAG; |
| 556 |
} |
| 557 |
else if (((src & 0x80000000L) != 0L) && |
| 558 |
((dst & 0x80000000L) != 0L)) |
| 559 |
{
|
| 560 |
flags |= C_FLAG; |
| 561 |
} |
| 562 |
} |
| 563 |
else
|
| 564 |
{
|
| 565 |
if (res == 0L) |
| 566 |
flags |= Z_FLAG; |
| 567 |
if (((src & 0x80000000L) != 0L) |
| 568 |
&& ((dst & 0x80000000L) != 0L)) |
| 569 |
flags |= V_FLAG; |
| 570 |
if ((dst & 0x80000000L) != 0L |
| 571 |
|| (src & 0x80000000L) != 0L) |
| 572 |
flags |= C_FLAG; |
| 573 |
} |
| 574 |
break;
|
| 575 |
default:
|
| 576 |
break;
|
| 577 |
} |
| 578 |
|
| 579 |
if (env->cc_op == CC_OP_SUB
|
| 580 |
|| env->cc_op == CC_OP_CMP) {
|
| 581 |
flags ^= C_FLAG; |
| 582 |
} |
| 583 |
evaluate_flags_writeback(flags); |
| 584 |
} |
| 585 |
|
| 586 |
void helper_top_evaluate_flags(void) |
| 587 |
{
|
| 588 |
switch (env->cc_op)
|
| 589 |
{
|
| 590 |
case CC_OP_MCP:
|
| 591 |
helper_evaluate_flags_mcp(); |
| 592 |
break;
|
| 593 |
case CC_OP_MULS:
|
| 594 |
helper_evaluate_flags_muls(); |
| 595 |
break;
|
| 596 |
case CC_OP_MULU:
|
| 597 |
helper_evaluate_flags_mulu(); |
| 598 |
break;
|
| 599 |
case CC_OP_MOVE:
|
| 600 |
case CC_OP_AND:
|
| 601 |
case CC_OP_OR:
|
| 602 |
case CC_OP_XOR:
|
| 603 |
case CC_OP_ASR:
|
| 604 |
case CC_OP_LSR:
|
| 605 |
case CC_OP_LSL:
|
| 606 |
switch (env->cc_size)
|
| 607 |
{
|
| 608 |
case 4: |
| 609 |
helper_evaluate_flags_move_4(); |
| 610 |
break;
|
| 611 |
case 2: |
| 612 |
helper_evaluate_flags_move_2(); |
| 613 |
break;
|
| 614 |
default:
|
| 615 |
helper_evaluate_flags(); |
| 616 |
break;
|
| 617 |
} |
| 618 |
break;
|
| 619 |
case CC_OP_FLAGS:
|
| 620 |
/* live. */
|
| 621 |
break;
|
| 622 |
default:
|
| 623 |
{
|
| 624 |
switch (env->cc_size)
|
| 625 |
{
|
| 626 |
case 4: |
| 627 |
helper_evaluate_flags_alu_4(); |
| 628 |
break;
|
| 629 |
default:
|
| 630 |
helper_evaluate_flags(); |
| 631 |
break;
|
| 632 |
} |
| 633 |
} |
| 634 |
break;
|
| 635 |
} |
| 636 |
} |