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ef79bbde P |
1 | /*************************************************************************** |
2 | * Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team * | |
f9ae4f29 | 3 | * Copyright (C) 2023 notaz * |
ef79bbde P |
4 | * * |
5 | * This program is free software; you can redistribute it and/or modify * | |
6 | * it under the terms of the GNU General Public License as published by * | |
7 | * the Free Software Foundation; either version 2 of the License, or * | |
8 | * (at your option) any later version. * | |
9 | * * | |
10 | * This program is distributed in the hope that it will be useful, * | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
13 | * GNU General Public License for more details. * | |
14 | * * | |
15 | * You should have received a copy of the GNU General Public License * | |
16 | * along with this program; if not, write to the * | |
17 | * Free Software Foundation, Inc., * | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * | |
19 | ***************************************************************************/ | |
20 | ||
21 | /* | |
22 | * PSX assembly interpreter. | |
23 | */ | |
24 | ||
25 | #include "psxcommon.h" | |
26 | #include "r3000a.h" | |
27 | #include "gte.h" | |
28 | #include "psxhle.h" | |
3968e69e | 29 | #include "psxinterpreter.h" |
4cc373dd | 30 | #include <stddef.h> |
32631e6a | 31 | #include <assert.h> |
905b7c25 | 32 | #include "../include/compiler_features.h" |
33 | ||
34 | // these may cause issues: because of poor timing we may step | |
35 | // on instructions that real hardware would never reach | |
36 | #define DO_EXCEPTION_RESERVEDI | |
f9ae4f29 | 37 | #define HANDLE_LOAD_DELAY |
ef79bbde | 38 | |
bc7c5acb | 39 | static int branchSeen = 0; |
ef79bbde | 40 | |
4cc373dd | 41 | #ifdef __i386__ |
42 | #define INT_ATTR __attribute__((regparm(2))) | |
43 | #else | |
44 | #define INT_ATTR | |
45 | #endif | |
46 | #ifndef INVALID_PTR | |
47 | #define INVALID_PTR NULL | |
48 | #endif | |
49 | ||
ef79bbde | 50 | // Subsets |
4cc373dd | 51 | static void (INT_ATTR *psxBSC[64])(psxRegisters *regs_, u32 code); |
52 | static void (INT_ATTR *psxSPC[64])(psxRegisters *regs_, u32 code); | |
53 | ||
f9ae4f29 | 54 | // load delay |
55 | static void doLoad(psxRegisters *regs, u32 r, u32 val) | |
56 | { | |
57 | #ifdef HANDLE_LOAD_DELAY | |
58 | int sel = regs->dloadSel ^ 1; | |
59 | assert(regs->dloadReg[sel] == 0); | |
60 | regs->dloadReg[sel] = r; | |
61 | regs->dloadVal[sel] = r ? val : 0; | |
62 | if (regs->dloadReg[sel ^ 1] == r) | |
63 | regs->dloadVal[sel ^ 1] = regs->dloadReg[sel ^ 1] = 0; | |
64 | #else | |
65 | regs->GPR.r[r] = r ? val : 0; | |
66 | #endif | |
67 | } | |
68 | ||
69 | static void dloadRt(psxRegisters *regs, u32 r, u32 val) | |
70 | { | |
71 | #ifdef HANDLE_LOAD_DELAY | |
72 | int sel = regs->dloadSel; | |
73 | if (unlikely(regs->dloadReg[sel] == r)) | |
74 | regs->dloadVal[sel] = regs->dloadReg[sel] = 0; | |
75 | #endif | |
76 | regs->GPR.r[r] = r ? val : 0; | |
77 | } | |
78 | ||
79 | static void dloadStep(psxRegisters *regs) | |
80 | { | |
81 | #ifdef HANDLE_LOAD_DELAY | |
82 | int sel = regs->dloadSel; | |
83 | regs->GPR.r[regs->dloadReg[sel]] = regs->dloadVal[sel]; | |
84 | regs->dloadVal[sel] = regs->dloadReg[sel] = 0; | |
85 | regs->dloadSel ^= 1; | |
86 | assert(regs->GPR.r[0] == 0); | |
87 | #endif | |
88 | } | |
89 | ||
90 | static void dloadFlush(psxRegisters *regs) | |
91 | { | |
92 | #ifdef HANDLE_LOAD_DELAY | |
93 | regs->GPR.r[regs->dloadReg[0]] = regs->dloadVal[0]; | |
94 | regs->GPR.r[regs->dloadReg[1]] = regs->dloadVal[1]; | |
95 | regs->dloadVal[0] = regs->dloadVal[1] = 0; | |
96 | regs->dloadReg[0] = regs->dloadReg[1] = 0; | |
97 | assert(regs->GPR.r[0] == 0); | |
98 | #endif | |
99 | } | |
100 | ||
101 | static void dloadClear(psxRegisters *regs) | |
102 | { | |
103 | #ifdef HANDLE_LOAD_DELAY | |
104 | regs->dloadVal[0] = regs->dloadVal[1] = 0; | |
105 | regs->dloadReg[0] = regs->dloadReg[1] = 0; | |
106 | regs->dloadSel = 0; | |
107 | #endif | |
108 | } | |
109 | ||
110 | static void intException(psxRegisters *regs, u32 pc, u32 cause) | |
111 | { | |
bc7c5acb | 112 | if (cause != 0x20) { |
113 | //FILE *f = fopen("/tmp/psx_ram.bin", "wb"); | |
114 | //fwrite(psxM, 1, 0x200000, f); fclose(f); | |
115 | log_unhandled("exception %08x @%08x\n", cause, pc); | |
116 | } | |
f9ae4f29 | 117 | dloadFlush(regs); |
118 | regs->pc = pc; | |
bc7c5acb | 119 | psxException(cause, regs->branching, ®s->CP0); |
120 | regs->branching = R3000A_BRANCH_NONE_OR_EXCEPTION; | |
121 | } | |
122 | ||
123 | // exception caused by current instruction (excluding unkasking) | |
124 | static void intExceptionInsn(psxRegisters *regs, u32 cause) | |
125 | { | |
126 | cause |= (regs->code & 0x0c000000) << 2; | |
127 | intException(regs, regs->pc - 4, cause); | |
128 | } | |
129 | ||
130 | // 29 Enable for 80000000-ffffffff | |
131 | // 30 Enable for 00000000-7fffffff | |
132 | // 31 Enable exception | |
133 | #define DBR_ABIT(dc, a) ((dc) & (1u << (29+(((a)>>31)^1)))) | |
134 | #define DBR_EN_EXEC(dc, a) (((dc) & 0x01800000) == 0x01800000 && DBR_ABIT(dc, a)) | |
135 | #define DBR_EN_LD(dc, a) (((dc) & 0x06800000) == 0x06800000 && DBR_ABIT(dc, a)) | |
136 | #define DBR_EN_ST(dc, a) (((dc) & 0x0a800000) == 0x0a800000 && DBR_ABIT(dc, a)) | |
137 | static void intExceptionDebugBp(psxRegisters *regs, u32 pc) | |
138 | { | |
139 | psxCP0Regs *cp0 = ®s->CP0; | |
140 | dloadFlush(regs); | |
141 | cp0->n.Cause &= 0x300; | |
142 | cp0->n.Cause |= (regs->branching << 30) | (R3000E_Bp << 2); | |
143 | cp0->n.SR = (cp0->n.SR & ~0x3f) | ((cp0->n.SR & 0x0f) << 2); | |
144 | cp0->n.EPC = regs->branching ? pc - 4 : pc; | |
145 | psxRegs.pc = 0x80000040; | |
146 | } | |
147 | ||
148 | static int execBreakCheck(psxRegisters *regs, u32 pc) | |
149 | { | |
150 | if (unlikely(DBR_EN_EXEC(regs->CP0.n.DCIC, pc) && | |
151 | ((pc ^ regs->CP0.n.BPC) & regs->CP0.n.BPCM) == 0)) | |
152 | { | |
153 | regs->CP0.n.DCIC |= 0x03; | |
154 | if (regs->CP0.n.DCIC & (1u << 31)) { | |
155 | intExceptionDebugBp(regs, pc); | |
156 | return 1; | |
157 | } | |
158 | } | |
159 | return 0; | |
f9ae4f29 | 160 | } |
161 | ||
905b7c25 | 162 | // get an opcode without triggering exceptions or affecting cache |
163 | u32 intFakeFetch(u32 pc) | |
164 | { | |
165 | u8 *base = psxMemRLUT[pc >> 16]; | |
166 | u32 *code; | |
167 | if (unlikely(base == INVALID_PTR)) | |
168 | return 0; // nop | |
169 | code = (u32 *)(base + (pc & 0xfffc)); | |
170 | return SWAP32(*code); | |
171 | ||
172 | } | |
173 | ||
174 | static u32 INT_ATTR fetchNoCache(psxRegisters *regs, u8 **memRLUT, u32 pc) | |
61ad2a61 | 175 | { |
4cc373dd | 176 | u8 *base = memRLUT[pc >> 16]; |
905b7c25 | 177 | u32 *code; |
178 | if (unlikely(base == INVALID_PTR)) { | |
179 | SysPrintf("game crash @%08x, ra=%08x\n", pc, regs->GPR.n.ra); | |
f9ae4f29 | 180 | intException(regs, pc, R3000E_IBE << 2); |
905b7c25 | 181 | return 0; // execute as nop |
182 | } | |
183 | code = (u32 *)(base + (pc & 0xfffc)); | |
4cc373dd | 184 | return SWAP32(*code); |
61ad2a61 | 185 | } |
186 | ||
943a507a | 187 | /* |
188 | Formula One 2001 : | |
189 | Use old CPU cache code when the RAM location is updated with new code (affects in-game racing) | |
190 | */ | |
9f84fc93 | 191 | static struct cache_entry { |
192 | u32 tag; | |
193 | u32 data[4]; | |
194 | } ICache[256]; | |
195 | ||
905b7c25 | 196 | static u32 INT_ATTR fetchICache(psxRegisters *regs, u8 **memRLUT, u32 pc) |
943a507a | 197 | { |
9f84fc93 | 198 | // cached? |
199 | if (pc < 0xa0000000) | |
943a507a | 200 | { |
9f84fc93 | 201 | // this is not how the hardware works but whatever |
202 | struct cache_entry *entry = &ICache[(pc & 0xff0) >> 4]; | |
203 | ||
204 | if (((entry->tag ^ pc) & 0xfffffff0) != 0 || pc < entry->tag) | |
943a507a | 205 | { |
4cc373dd | 206 | const u8 *base = memRLUT[pc >> 16]; |
207 | const u32 *code; | |
905b7c25 | 208 | if (unlikely(base == INVALID_PTR)) { |
209 | SysPrintf("game crash @%08x, ra=%08x\n", pc, regs->GPR.n.ra); | |
f9ae4f29 | 210 | intException(regs, pc, R3000E_IBE << 2); |
905b7c25 | 211 | return 0; // execute as nop |
212 | } | |
4cc373dd | 213 | code = (u32 *)(base + (pc & 0xfff0)); |
9f84fc93 | 214 | |
215 | entry->tag = pc; | |
216 | // treat as 4 words, although other configurations are said to be possible | |
217 | switch (pc & 0x0c) | |
218 | { | |
219 | case 0x00: entry->data[0] = SWAP32(code[0]); | |
220 | case 0x04: entry->data[1] = SWAP32(code[1]); | |
221 | case 0x08: entry->data[2] = SWAP32(code[2]); | |
222 | case 0x0c: entry->data[3] = SWAP32(code[3]); | |
223 | } | |
943a507a | 224 | } |
9f84fc93 | 225 | return entry->data[(pc & 0x0f) >> 2]; |
943a507a | 226 | } |
227 | ||
905b7c25 | 228 | return fetchNoCache(regs, memRLUT, pc); |
943a507a | 229 | } |
61ad2a61 | 230 | |
905b7c25 | 231 | static u32 (INT_ATTR *fetch)(psxRegisters *regs_, u8 **memRLUT, u32 pc) = fetchNoCache; |
943a507a | 232 | |
d5aeda23 | 233 | // Make the timing events trigger faster as we are currently assuming everything |
234 | // takes one cycle, which is not the case on real hardware. | |
235 | // FIXME: count cache misses, memory latencies, stalls to get rid of this | |
bc7c5acb | 236 | static inline void addCycle(psxRegisters *regs) |
d5aeda23 | 237 | { |
bc7c5acb | 238 | assert(regs->subCycleStep >= 0x10000); |
239 | regs->subCycle += regs->subCycleStep; | |
240 | regs->cycle += regs->subCycle >> 16; | |
241 | regs->subCycle &= 0xffff; | |
d5aeda23 | 242 | } |
243 | ||
4cc373dd | 244 | /**** R3000A Instruction Macros ****/ |
245 | #define _PC_ regs_->pc // The next PC to be executed | |
246 | ||
247 | #define _fOp_(code) ((code >> 26) ) // The opcode part of the instruction register | |
248 | #define _fFunct_(code) ((code ) & 0x3F) // The funct part of the instruction register | |
249 | #define _fRd_(code) ((code >> 11) & 0x1F) // The rd part of the instruction register | |
250 | #define _fRt_(code) ((code >> 16) & 0x1F) // The rt part of the instruction register | |
251 | #define _fRs_(code) ((code >> 21) & 0x1F) // The rs part of the instruction register | |
252 | #define _fSa_(code) ((code >> 6) & 0x1F) // The sa part of the instruction register | |
253 | #define _fIm_(code) ((u16)code) // The immediate part of the instruction register | |
254 | #define _fTarget_(code) (code & 0x03ffffff) // The target part of the instruction register | |
255 | ||
256 | #define _fImm_(code) ((s16)code) // sign-extended immediate | |
257 | #define _fImmU_(code) (code&0xffff) // zero-extended immediate | |
258 | ||
259 | #define _Op_ _fOp_(code) | |
260 | #define _Funct_ _fFunct_(code) | |
261 | #define _Rd_ _fRd_(code) | |
262 | #define _Rt_ _fRt_(code) | |
263 | #define _Rs_ _fRs_(code) | |
264 | #define _Sa_ _fSa_(code) | |
265 | #define _Im_ _fIm_(code) | |
266 | #define _Target_ _fTarget_(code) | |
267 | ||
268 | #define _Imm_ _fImm_(code) | |
269 | #define _ImmU_ _fImmU_(code) | |
270 | ||
271 | #define _rRs_ regs_->GPR.r[_Rs_] // Rs register | |
272 | #define _rRt_ regs_->GPR.r[_Rt_] // Rt register | |
4cc373dd | 273 | #define _rSa_ regs_->GPR.r[_Sa_] // Sa register |
4cc373dd | 274 | |
275 | #define _rHi_ regs_->GPR.n.hi // The HI register | |
276 | #define _rLo_ regs_->GPR.n.lo // The LO register | |
277 | ||
278 | #define _JumpTarget_ ((_Target_ * 4) + (_PC_ & 0xf0000000)) // Calculates the target during a jump instruction | |
279 | #define _BranchTarget_ ((s16)_Im_ * 4 + _PC_) // Calculates the target during a branch instruction | |
280 | ||
f9ae4f29 | 281 | #define _SetLink(x) dloadRt(regs_, x, _PC_ + 4); // Sets the return address in the link register |
4cc373dd | 282 | |
283 | #define OP(name) \ | |
284 | static inline INT_ATTR void name(psxRegisters *regs_, u32 code) | |
285 | ||
ef79bbde P |
286 | // this defines shall be used with the tmp |
287 | // of the next func (instead of _Funct_...) | |
288 | #define _tFunct_ ((tmp ) & 0x3F) // The funct part of the instruction register | |
289 | #define _tRd_ ((tmp >> 11) & 0x1F) // The rd part of the instruction register | |
290 | #define _tRt_ ((tmp >> 16) & 0x1F) // The rt part of the instruction register | |
291 | #define _tRs_ ((tmp >> 21) & 0x1F) // The rs part of the instruction register | |
292 | #define _tSa_ ((tmp >> 6) & 0x1F) // The sa part of the instruction register | |
293 | ||
4cc373dd | 294 | #define _i32(x) (s32)(x) |
295 | #define _u32(x) (u32)(x) | |
296 | ||
b9698f9d | 297 | #define isBranch(c_) \ |
298 | ((1 <= ((c_) >> 26) && ((c_) >> 26) <= 7) || ((c_) & 0xfc00003e) == 8) | |
299 | #define swap_(a_, b_) { u32 t_ = a_; a_ = b_; b_ = t_; } | |
990cb018 | 300 | |
b9698f9d | 301 | // tar1 is main branch target, 'code' is opcode in DS |
302 | static u32 psxBranchNoDelay(psxRegisters *regs_, u32 tar1, u32 code, int *taken) { | |
303 | u32 temp, rt; | |
304 | ||
305 | assert(isBranch(code)); | |
306 | *taken = 1; | |
307 | switch (code >> 26) { | |
990cb018 | 308 | case 0x00: // SPECIAL |
309 | switch (_Funct_) { | |
310 | case 0x08: // JR | |
311 | return _u32(_rRs_); | |
312 | case 0x09: // JALR | |
313 | temp = _u32(_rRs_); | |
b9698f9d | 314 | if (_Rd_) |
315 | regs_->GPR.r[_Rd_] = tar1 + 4; | |
990cb018 | 316 | return temp; |
317 | } | |
318 | break; | |
319 | case 0x01: // REGIMM | |
b9698f9d | 320 | rt = _Rt_; |
321 | switch (rt) { | |
322 | case 0x10: // BLTZAL | |
323 | regs_->GPR.n.ra = tar1 + 4; | |
990cb018 | 324 | if (_i32(_rRs_) < 0) |
b9698f9d | 325 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 326 | break; |
b9698f9d | 327 | case 0x11: // BGEZAL |
328 | regs_->GPR.n.ra = tar1 + 4; | |
990cb018 | 329 | if (_i32(_rRs_) >= 0) |
b9698f9d | 330 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 331 | break; |
b9698f9d | 332 | default: |
333 | if (rt & 1) { // BGEZ | |
334 | if (_i32(_rRs_) >= 0) | |
335 | return tar1 + (s16)_Im_ * 4; | |
990cb018 | 336 | } |
b9698f9d | 337 | else { // BLTZ |
338 | if (_i32(_rRs_) < 0) | |
339 | return tar1 + (s16)_Im_ * 4; | |
990cb018 | 340 | } |
341 | break; | |
342 | } | |
343 | break; | |
344 | case 0x02: // J | |
b9698f9d | 345 | return (tar1 & 0xf0000000u) + _Target_ * 4; |
990cb018 | 346 | case 0x03: // JAL |
b9698f9d | 347 | regs_->GPR.n.ra = tar1 + 4; |
348 | return (tar1 & 0xf0000000u) + _Target_ * 4; | |
990cb018 | 349 | case 0x04: // BEQ |
350 | if (_i32(_rRs_) == _i32(_rRt_)) | |
b9698f9d | 351 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 352 | break; |
353 | case 0x05: // BNE | |
354 | if (_i32(_rRs_) != _i32(_rRt_)) | |
b9698f9d | 355 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 356 | break; |
357 | case 0x06: // BLEZ | |
358 | if (_i32(_rRs_) <= 0) | |
b9698f9d | 359 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 360 | break; |
361 | case 0x07: // BGTZ | |
362 | if (_i32(_rRs_) > 0) | |
b9698f9d | 363 | return tar1 + (s16)_Im_ * 4; |
990cb018 | 364 | break; |
365 | } | |
366 | ||
b9698f9d | 367 | *taken = 0; |
368 | return tar1; | |
990cb018 | 369 | } |
370 | ||
b9698f9d | 371 | static void psxDoDelayBranch(psxRegisters *regs, u32 tar1, u32 code1) { |
372 | u32 tar2, code; | |
373 | int taken, lim; | |
990cb018 | 374 | |
b9698f9d | 375 | tar2 = psxBranchNoDelay(regs, tar1, code1, &taken); |
376 | regs->pc = tar1; | |
377 | if (!taken) | |
378 | return; | |
990cb018 | 379 | |
990cb018 | 380 | /* |
b9698f9d | 381 | * taken branch in delay slot: |
990cb018 | 382 | * - execute 1 instruction at tar1 |
383 | * - jump to tar2 (target of branch in delay slot; this branch | |
384 | * has no normal delay slot, instruction at tar1 was fetched instead) | |
385 | */ | |
b9698f9d | 386 | for (lim = 0; lim < 8; lim++) { |
387 | regs->code = code = fetch(regs, psxMemRLUT, tar1); | |
bc7c5acb | 388 | addCycle(regs); |
b9698f9d | 389 | if (likely(!isBranch(code))) { |
f9ae4f29 | 390 | dloadStep(regs); |
b9698f9d | 391 | psxBSC[code >> 26](regs, code); |
392 | regs->pc = tar2; | |
393 | return; | |
394 | } | |
395 | tar1 = psxBranchNoDelay(regs, tar2, code, &taken); | |
396 | regs->pc = tar2; | |
397 | if (!taken) | |
398 | return; | |
399 | swap_(tar1, tar2); | |
990cb018 | 400 | } |
b9698f9d | 401 | SysPrintf("Evil chained DS branches @ %08x %08x %08x\n", regs->pc, tar1, tar2); |
990cb018 | 402 | } |
403 | ||
bc7c5acb | 404 | static void doBranch(psxRegisters *regs, u32 tar, enum R3000Abdt taken) { |
405 | u32 code, pc, pc_final; | |
ef79bbde | 406 | |
bc7c5acb | 407 | branchSeen = regs->branching = taken; |
408 | pc_final = taken == R3000A_BRANCH_TAKEN ? tar : regs->pc + 4; | |
990cb018 | 409 | |
b9698f9d | 410 | // fetch the delay slot |
411 | pc = regs->pc; | |
412 | regs->pc = pc + 4; | |
413 | regs->code = code = fetch(regs, psxMemRLUT, pc); | |
905b7c25 | 414 | |
bc7c5acb | 415 | addCycle(regs); |
ef79bbde | 416 | |
b9698f9d | 417 | // check for branch in delay slot |
418 | if (unlikely(isBranch(code))) { | |
bc7c5acb | 419 | regs->pc = pc; |
420 | if (taken == R3000A_BRANCH_TAKEN) | |
421 | psxDoDelayBranch(regs, tar, code); | |
b9698f9d | 422 | log_unhandled("branch in DS: %08x->%08x\n", pc, regs->pc); |
bc7c5acb | 423 | regs->branching = 0; |
b9698f9d | 424 | psxBranchTest(); |
425 | return; | |
426 | } | |
427 | ||
f9ae4f29 | 428 | dloadStep(regs); |
b9698f9d | 429 | psxBSC[code >> 26](regs, code); |
ef79bbde | 430 | |
bc7c5acb | 431 | if (likely(regs->branching != R3000A_BRANCH_NONE_OR_EXCEPTION)) |
432 | regs->pc = pc_final; | |
433 | else | |
434 | regs->CP0.n.Target = pc_final; | |
435 | regs->branching = 0; | |
ef79bbde P |
436 | |
437 | psxBranchTest(); | |
438 | } | |
439 | ||
b9698f9d | 440 | static void doBranchReg(psxRegisters *regs, u32 tar) { |
bc7c5acb | 441 | doBranch(regs, tar & ~3, R3000A_BRANCH_TAKEN); |
442 | } | |
443 | ||
444 | static void doBranchRegE(psxRegisters *regs, u32 tar) { | |
445 | if (unlikely(DBR_EN_EXEC(regs->CP0.n.DCIC, tar) && | |
446 | ((tar ^ regs->CP0.n.BPC) & regs->CP0.n.BPCM) == 0)) | |
447 | regs->CP0.n.DCIC |= 0x03; | |
905b7c25 | 448 | if (unlikely(tar & 3)) { |
f9ae4f29 | 449 | SysPrintf("game crash @%08x, ra=%08x\n", tar, regs->GPR.n.ra); |
bc7c5acb | 450 | regs->CP0.n.BadVAddr = tar; |
f9ae4f29 | 451 | intException(regs, tar, R3000E_AdEL << 2); |
905b7c25 | 452 | return; |
453 | } | |
bc7c5acb | 454 | doBranch(regs, tar, R3000A_BRANCH_TAKEN); |
905b7c25 | 455 | } |
456 | ||
457 | #if __has_builtin(__builtin_add_overflow) || (defined(__GNUC__) && __GNUC__ >= 5) | |
458 | #define add_overflow(a, b, r) __builtin_add_overflow(a, b, &(r)) | |
459 | #define sub_overflow(a, b, r) __builtin_sub_overflow(a, b, &(r)) | |
460 | #else | |
461 | #define add_overflow(a, b, r) ({r = (u32)a + (u32)b; (a ^ ~b) & (a ^ r) & (1u<<31);}) | |
462 | #define sub_overflow(a, b, r) ({r = (u32)a - (u32)b; (a ^ b) & (a ^ r) & (1u<<31);}) | |
463 | #endif | |
464 | ||
465 | static void addExc(psxRegisters *regs, u32 rt, s32 a1, s32 a2) { | |
f9ae4f29 | 466 | s32 val; |
467 | if (add_overflow(a1, a2, val)) { | |
468 | //printf("ov %08x + %08x = %08x\n", a1, a2, val); | |
bc7c5acb | 469 | intExceptionInsn(regs, R3000E_Ov << 2); |
905b7c25 | 470 | return; |
471 | } | |
f9ae4f29 | 472 | dloadRt(regs, rt, val); |
905b7c25 | 473 | } |
474 | ||
475 | static void subExc(psxRegisters *regs, u32 rt, s32 a1, s32 a2) { | |
f9ae4f29 | 476 | s32 val; |
477 | if (sub_overflow(a1, a2, val)) { | |
bc7c5acb | 478 | intExceptionInsn(regs, R3000E_Ov << 2); |
905b7c25 | 479 | return; |
480 | } | |
f9ae4f29 | 481 | dloadRt(regs, rt, val); |
905b7c25 | 482 | } |
483 | ||
ef79bbde P |
484 | /********************************************************* |
485 | * Arithmetic with immediate operand * | |
486 | * Format: OP rt, rs, immediate * | |
487 | *********************************************************/ | |
f9ae4f29 | 488 | OP(psxADDI) { addExc (regs_, _Rt_, _i32(_rRs_), _Imm_); } // Rt = Rs + Im (Exception on Integer Overflow) |
489 | OP(psxADDIU) { dloadRt(regs_, _Rt_, _u32(_rRs_) + _Imm_ ); } // Rt = Rs + Im | |
490 | OP(psxANDI) { dloadRt(regs_, _Rt_, _u32(_rRs_) & _ImmU_); } // Rt = Rs And Im | |
491 | OP(psxORI) { dloadRt(regs_, _Rt_, _u32(_rRs_) | _ImmU_); } // Rt = Rs Or Im | |
492 | OP(psxXORI) { dloadRt(regs_, _Rt_, _u32(_rRs_) ^ _ImmU_); } // Rt = Rs Xor Im | |
493 | OP(psxSLTI) { dloadRt(regs_, _Rt_, _i32(_rRs_) < _Imm_ ); } // Rt = Rs < Im (Signed) | |
494 | OP(psxSLTIU) { dloadRt(regs_, _Rt_, _u32(_rRs_) < ((u32)_Imm_)); } // Rt = Rs < Im (Unsigned) | |
ef79bbde P |
495 | |
496 | /********************************************************* | |
497 | * Register arithmetic * | |
498 | * Format: OP rd, rs, rt * | |
499 | *********************************************************/ | |
f9ae4f29 | 500 | OP(psxADD) { addExc (regs_, _Rd_, _i32(_rRs_), _i32(_rRt_)); } // Rd = Rs + Rt (Exception on Integer Overflow) |
501 | OP(psxSUB) { subExc (regs_, _Rd_, _i32(_rRs_), _i32(_rRt_)); } // Rd = Rs - Rt (Exception on Integer Overflow) | |
502 | OP(psxADDU) { dloadRt(regs_, _Rd_, _u32(_rRs_) + _u32(_rRt_)); } // Rd = Rs + Rt | |
503 | OP(psxSUBU) { dloadRt(regs_, _Rd_, _u32(_rRs_) - _u32(_rRt_)); } // Rd = Rs - Rt | |
504 | OP(psxAND) { dloadRt(regs_, _Rd_, _u32(_rRs_) & _u32(_rRt_)); } // Rd = Rs And Rt | |
505 | OP(psxOR) { dloadRt(regs_, _Rd_, _u32(_rRs_) | _u32(_rRt_)); } // Rd = Rs Or Rt | |
506 | OP(psxXOR) { dloadRt(regs_, _Rd_, _u32(_rRs_) ^ _u32(_rRt_)); } // Rd = Rs Xor Rt | |
507 | OP(psxNOR) { dloadRt(regs_, _Rd_, ~_u32(_rRs_ | _u32(_rRt_))); } // Rd = Rs Nor Rt | |
508 | OP(psxSLT) { dloadRt(regs_, _Rd_, _i32(_rRs_) < _i32(_rRt_)); } // Rd = Rs < Rt (Signed) | |
509 | OP(psxSLTU) { dloadRt(regs_, _Rd_, _u32(_rRs_) < _u32(_rRt_)); } // Rd = Rs < Rt (Unsigned) | |
ef79bbde P |
510 | |
511 | /********************************************************* | |
512 | * Register mult/div & Register trap logic * | |
513 | * Format: OP rs, rt * | |
514 | *********************************************************/ | |
4cc373dd | 515 | OP(psxDIV) { |
516 | if (!_rRt_) { | |
517 | _rHi_ = _rRs_; | |
518 | if (_rRs_ & 0x80000000) { | |
519 | _rLo_ = 1; | |
520 | } else { | |
521 | _rLo_ = 0xFFFFFFFF; | |
522 | } | |
523 | } | |
a4ae3997 | 524 | #if !defined(__arm__) && !defined(__aarch64__) |
4cc373dd | 525 | else if (_rRs_ == 0x80000000 && _rRt_ == 0xFFFFFFFF) { |
526 | _rLo_ = 0x80000000; | |
527 | _rHi_ = 0; | |
528 | } | |
a4ae3997 | 529 | #endif |
4cc373dd | 530 | else { |
531 | _rLo_ = _i32(_rRs_) / _i32(_rRt_); | |
532 | _rHi_ = _i32(_rRs_) % _i32(_rRt_); | |
533 | } | |
ef79bbde P |
534 | } |
535 | ||
4cc373dd | 536 | OP(psxDIV_stall) { |
537 | regs_->muldivBusyCycle = regs_->cycle + 37; | |
538 | psxDIV(regs_, code); | |
32631e6a | 539 | } |
540 | ||
4cc373dd | 541 | OP(psxDIVU) { |
ef79bbde P |
542 | if (_rRt_ != 0) { |
543 | _rLo_ = _rRs_ / _rRt_; | |
544 | _rHi_ = _rRs_ % _rRt_; | |
545 | } | |
c7a56f4f | 546 | else { |
4cc373dd | 547 | _rLo_ = 0xffffffff; |
548 | _rHi_ = _rRs_; | |
c7a56f4f | 549 | } |
ef79bbde P |
550 | } |
551 | ||
4cc373dd | 552 | OP(psxDIVU_stall) { |
553 | regs_->muldivBusyCycle = regs_->cycle + 37; | |
554 | psxDIVU(regs_, code); | |
32631e6a | 555 | } |
556 | ||
4cc373dd | 557 | OP(psxMULT) { |
558 | u64 res = (s64)_i32(_rRs_) * _i32(_rRt_); | |
ef79bbde | 559 | |
4cc373dd | 560 | regs_->GPR.n.lo = (u32)res; |
561 | regs_->GPR.n.hi = (u32)(res >> 32); | |
ef79bbde P |
562 | } |
563 | ||
4cc373dd | 564 | OP(psxMULT_stall) { |
32631e6a | 565 | // approximate, but maybe good enough |
566 | u32 rs = _rRs_; | |
567 | u32 lz = __builtin_clz(((rs ^ ((s32)rs >> 21)) | 1)); | |
568 | u32 c = 7 + (2 - (lz / 11)) * 4; | |
4cc373dd | 569 | regs_->muldivBusyCycle = regs_->cycle + c; |
570 | psxMULT(regs_, code); | |
32631e6a | 571 | } |
572 | ||
4cc373dd | 573 | OP(psxMULTU) { |
574 | u64 res = (u64)_u32(_rRs_) * _u32(_rRt_); | |
ef79bbde | 575 | |
4cc373dd | 576 | regs_->GPR.n.lo = (u32)(res & 0xffffffff); |
577 | regs_->GPR.n.hi = (u32)((res >> 32) & 0xffffffff); | |
ef79bbde P |
578 | } |
579 | ||
4cc373dd | 580 | OP(psxMULTU_stall) { |
32631e6a | 581 | // approximate, but maybe good enough |
582 | u32 lz = __builtin_clz(_rRs_ | 1); | |
583 | u32 c = 7 + (2 - (lz / 11)) * 4; | |
4cc373dd | 584 | regs_->muldivBusyCycle = regs_->cycle + c; |
585 | psxMULTU(regs_, code); | |
32631e6a | 586 | } |
587 | ||
ef79bbde P |
588 | /********************************************************* |
589 | * Register branch logic * | |
590 | * Format: OP rs, offset * | |
591 | *********************************************************/ | |
bc7c5acb | 592 | #define BrCond(c) (c) ? R3000A_BRANCH_TAKEN : R3000A_BRANCH_NOT_TAKEN |
19fae7fc | 593 | #define RepZBranchi32(op) \ |
bc7c5acb | 594 | doBranch(regs_, _BranchTarget_, BrCond(_i32(_rRs_) op 0)); |
19fae7fc | 595 | #define RepZBranchLinki32(op) { \ |
596 | s32 temp = _i32(_rRs_); \ | |
bc7c5acb | 597 | dloadFlush(regs_); \ |
19fae7fc | 598 | _SetLink(31); \ |
bc7c5acb | 599 | doBranch(regs_, _BranchTarget_, BrCond(temp op 0)); \ |
19fae7fc | 600 | } |
ef79bbde | 601 | |
4cc373dd | 602 | OP(psxBGEZ) { RepZBranchi32(>=) } // Branch if Rs >= 0 |
603 | OP(psxBGEZAL) { RepZBranchLinki32(>=) } // Branch if Rs >= 0 and link | |
604 | OP(psxBGTZ) { RepZBranchi32(>) } // Branch if Rs > 0 | |
605 | OP(psxBLEZ) { RepZBranchi32(<=) } // Branch if Rs <= 0 | |
606 | OP(psxBLTZ) { RepZBranchi32(<) } // Branch if Rs < 0 | |
607 | OP(psxBLTZAL) { RepZBranchLinki32(<) } // Branch if Rs < 0 and link | |
ef79bbde P |
608 | |
609 | /********************************************************* | |
610 | * Shift arithmetic with constant shift * | |
611 | * Format: OP rd, rt, sa * | |
612 | *********************************************************/ | |
f9ae4f29 | 613 | OP(psxSLL) { dloadRt(regs_, _Rd_, _u32(_rRt_) << _Sa_); } // Rd = Rt << sa |
614 | OP(psxSRA) { dloadRt(regs_, _Rd_, _i32(_rRt_) >> _Sa_); } // Rd = Rt >> sa (arithmetic) | |
615 | OP(psxSRL) { dloadRt(regs_, _Rd_, _u32(_rRt_) >> _Sa_); } // Rd = Rt >> sa (logical) | |
ef79bbde P |
616 | |
617 | /********************************************************* | |
618 | * Shift arithmetic with variant register shift * | |
619 | * Format: OP rd, rt, rs * | |
620 | *********************************************************/ | |
f9ae4f29 | 621 | OP(psxSLLV) { dloadRt(regs_, _Rd_, _u32(_rRt_) << (_u32(_rRs_) & 0x1F)); } // Rd = Rt << rs |
622 | OP(psxSRAV) { dloadRt(regs_, _Rd_, _i32(_rRt_) >> (_u32(_rRs_) & 0x1F)); } // Rd = Rt >> rs (arithmetic) | |
623 | OP(psxSRLV) { dloadRt(regs_, _Rd_, _u32(_rRt_) >> (_u32(_rRs_) & 0x1F)); } // Rd = Rt >> rs (logical) | |
ef79bbde P |
624 | |
625 | /********************************************************* | |
626 | * Load higher 16 bits of the first word in GPR with imm * | |
627 | * Format: OP rt, immediate * | |
628 | *********************************************************/ | |
f9ae4f29 | 629 | OP(psxLUI) { dloadRt(regs_, _Rt_, code << 16); } // Upper halfword of Rt = Im |
ef79bbde P |
630 | |
631 | /********************************************************* | |
632 | * Move from HI/LO to GPR * | |
633 | * Format: OP rd * | |
634 | *********************************************************/ | |
f9ae4f29 | 635 | OP(psxMFHI) { dloadRt(regs_, _Rd_, _rHi_); } // Rd = Hi |
636 | OP(psxMFLO) { dloadRt(regs_, _Rd_, _rLo_); } // Rd = Lo | |
ef79bbde | 637 | |
4cc373dd | 638 | static void mflohiCheckStall(psxRegisters *regs_) |
32631e6a | 639 | { |
4cc373dd | 640 | u32 left = regs_->muldivBusyCycle - regs_->cycle; |
32631e6a | 641 | if (left <= 37) { |
642 | //printf("muldiv stall %u\n", left); | |
4cc373dd | 643 | regs_->cycle = regs_->muldivBusyCycle; |
32631e6a | 644 | } |
645 | } | |
646 | ||
4cc373dd | 647 | OP(psxMFHI_stall) { mflohiCheckStall(regs_); psxMFHI(regs_, code); } |
648 | OP(psxMFLO_stall) { mflohiCheckStall(regs_); psxMFLO(regs_, code); } | |
32631e6a | 649 | |
ef79bbde P |
650 | /********************************************************* |
651 | * Move to GPR to HI/LO & Register jump * | |
652 | * Format: OP rs * | |
653 | *********************************************************/ | |
4cc373dd | 654 | OP(psxMTHI) { _rHi_ = _rRs_; } // Hi = Rs |
655 | OP(psxMTLO) { _rLo_ = _rRs_; } // Lo = Rs | |
ef79bbde P |
656 | |
657 | /********************************************************* | |
658 | * Special purpose instructions * | |
659 | * Format: OP * | |
660 | *********************************************************/ | |
4cc373dd | 661 | OP(psxBREAK) { |
bc7c5acb | 662 | intExceptionInsn(regs_, R3000E_Bp << 2); |
ef79bbde P |
663 | } |
664 | ||
4cc373dd | 665 | OP(psxSYSCALL) { |
bc7c5acb | 666 | intExceptionInsn(regs_, R3000E_Syscall << 2); |
ef79bbde P |
667 | } |
668 | ||
905b7c25 | 669 | static inline void execI_(u8 **memRLUT, psxRegisters *regs_); |
670 | ||
671 | static inline void psxTestSWInts(psxRegisters *regs_, int step) { | |
bc7c5acb | 672 | if ((regs_->CP0.n.Cause & regs_->CP0.n.SR & 0x0300) && |
673 | (regs_->CP0.n.SR & 0x1)) { | |
905b7c25 | 674 | if (step) |
675 | execI_(psxMemRLUT, regs_); | |
4cc373dd | 676 | regs_->CP0.n.Cause &= ~0x7c; |
f9ae4f29 | 677 | intException(regs_, regs_->pc, regs_->CP0.n.Cause); |
4cc373dd | 678 | } |
679 | } | |
680 | ||
681 | OP(psxRFE) { | |
bc7c5acb | 682 | regs_->CP0.n.SR = (regs_->CP0.n.SR & ~0x0f) | ((regs_->CP0.n.SR & 0x3c) >> 2); |
905b7c25 | 683 | psxTestSWInts(regs_, 0); |
ef79bbde P |
684 | } |
685 | ||
686 | /********************************************************* | |
687 | * Register branch logic * | |
688 | * Format: OP rs, rt, offset * | |
689 | *********************************************************/ | |
bc7c5acb | 690 | #define RepBranchi32(op) \ |
691 | doBranch(regs_, _BranchTarget_, BrCond(_i32(_rRs_) op _i32(_rRt_))); | |
ef79bbde | 692 | |
4cc373dd | 693 | OP(psxBEQ) { RepBranchi32(==) } // Branch if Rs == Rt |
694 | OP(psxBNE) { RepBranchi32(!=) } // Branch if Rs != Rt | |
ef79bbde P |
695 | |
696 | /********************************************************* | |
697 | * Jump to target * | |
698 | * Format: OP target * | |
699 | *********************************************************/ | |
bc7c5acb | 700 | OP(psxJ) { doBranch(regs_, _JumpTarget_, R3000A_BRANCH_TAKEN); } |
701 | OP(psxJAL) { | |
702 | dloadFlush(regs_); | |
703 | _SetLink(31); | |
704 | doBranch(regs_, _JumpTarget_, R3000A_BRANCH_TAKEN); | |
705 | } | |
ef79bbde P |
706 | |
707 | /********************************************************* | |
708 | * Register jump * | |
709 | * Format: OP rs, rd * | |
710 | *********************************************************/ | |
4cc373dd | 711 | OP(psxJR) { |
b9698f9d | 712 | doBranchReg(regs_, _rRs_); |
ef79bbde P |
713 | psxJumpTest(); |
714 | } | |
715 | ||
bc7c5acb | 716 | OP(psxJRe) { |
717 | doBranchRegE(regs_, _rRs_); | |
718 | psxJumpTest(); | |
719 | } | |
720 | ||
4cc373dd | 721 | OP(psxJALR) { |
ef79bbde | 722 | u32 temp = _u32(_rRs_); |
bc7c5acb | 723 | dloadFlush(regs_); |
ef79bbde | 724 | if (_Rd_) { _SetLink(_Rd_); } |
b9698f9d | 725 | doBranchReg(regs_, temp); |
ef79bbde P |
726 | } |
727 | ||
bc7c5acb | 728 | OP(psxJALRe) { |
729 | u32 temp = _u32(_rRs_); | |
730 | dloadFlush(regs_); | |
731 | if (_Rd_) { _SetLink(_Rd_); } | |
732 | doBranchRegE(regs_, temp); | |
733 | } | |
734 | ||
ef79bbde | 735 | /********************************************************* |
ef79bbde P |
736 | *********************************************************/ |
737 | ||
bc7c5acb | 738 | // revisit: incomplete |
739 | #define BUS_LOCKED_ADDR(a) \ | |
740 | ((0x1fc80000u <= (a) && (a) < 0x80000000u) || \ | |
741 | (0xc0000000u <= (a) && (a) < 0xfffe0000u)) | |
742 | ||
743 | // exception checking order is important | |
744 | static inline int checkLD(psxRegisters *regs, u32 addr, u32 m) { | |
745 | int bpException = 0; | |
746 | if (unlikely(DBR_EN_LD(regs->CP0.n.DCIC, addr) && | |
747 | ((addr ^ regs->CP0.n.BDA) & regs->CP0.n.BDAM) == 0)) { | |
748 | regs->CP0.n.DCIC |= 0x0d; | |
749 | bpException = regs->CP0.n.DCIC >> 31; | |
750 | } | |
f9ae4f29 | 751 | if (unlikely(addr & m)) { |
bc7c5acb | 752 | regs->CP0.n.BadVAddr = addr; |
753 | intExceptionInsn(regs, R3000E_AdEL << 2); | |
754 | return 0; | |
755 | } | |
756 | if (unlikely(bpException)) { | |
757 | intExceptionDebugBp(regs, regs->pc - 4); | |
758 | return 0; | |
759 | } | |
760 | if (unlikely(BUS_LOCKED_ADDR(addr))) { | |
761 | intException(regs, regs->pc - 4, R3000E_DBE << 2); | |
f9ae4f29 | 762 | return 0; |
f9ae4f29 | 763 | } |
764 | return 1; | |
765 | } | |
766 | ||
bc7c5acb | 767 | static inline int checkST(psxRegisters *regs, u32 addr, u32 m) { |
768 | int bpException = 0; | |
769 | if (unlikely(DBR_EN_ST(regs->CP0.n.DCIC, addr) && | |
770 | ((addr ^ regs->CP0.n.BDA) & regs->CP0.n.BDAM) == 0)) { | |
771 | regs->CP0.n.DCIC |= 0x15; | |
772 | bpException = regs->CP0.n.DCIC >> 31; | |
773 | } | |
f9ae4f29 | 774 | if (unlikely(addr & m)) { |
bc7c5acb | 775 | regs->CP0.n.BadVAddr = addr; |
776 | intExceptionInsn(regs, R3000E_AdES << 2); | |
777 | return 0; | |
778 | } | |
779 | if (unlikely(bpException)) { | |
780 | intExceptionDebugBp(regs, regs->pc - 4); | |
781 | return 0; | |
782 | } | |
783 | if (unlikely(BUS_LOCKED_ADDR(addr))) { | |
784 | intException(regs, regs->pc - 4, R3000E_DBE << 2); | |
f9ae4f29 | 785 | return 0; |
f9ae4f29 | 786 | } |
787 | return 1; | |
788 | } | |
789 | ||
790 | /********************************************************* | |
791 | * Load and store for GPR * | |
792 | * Format: OP rt, offset(base) * | |
793 | *********************************************************/ | |
794 | ||
bc7c5acb | 795 | /********************************************************* |
796 | * Load and store for GPR * | |
797 | * Format: OP rt, offset(base) * | |
798 | *********************************************************/ | |
799 | ||
4cc373dd | 800 | #define _oB_ (regs_->GPR.r[_Rs_] + _Imm_) |
ef79bbde | 801 | |
bc7c5acb | 802 | OP(psxLB) { doLoad(regs_, _Rt_, (s8)psxMemRead8(_oB_)); } |
803 | OP(psxLBU) { doLoad(regs_, _Rt_, psxMemRead8(_oB_)); } | |
804 | OP(psxLH) { doLoad(regs_, _Rt_, (s16)psxMemRead16(_oB_ & ~1)); } | |
805 | OP(psxLHU) { doLoad(regs_, _Rt_, psxMemRead16(_oB_ & ~1)); } | |
806 | OP(psxLW) { doLoad(regs_, _Rt_, psxMemRead32(_oB_ & ~3)); } | |
ef79bbde | 807 | |
bc7c5acb | 808 | OP(psxLBe) { if (checkLD(regs_, _oB_, 0)) doLoad(regs_, _Rt_, (s8)psxMemRead8(_oB_)); } |
809 | OP(psxLBUe) { if (checkLD(regs_, _oB_, 0)) doLoad(regs_, _Rt_, psxMemRead8(_oB_)); } | |
810 | OP(psxLHe) { if (checkLD(regs_, _oB_, 1)) doLoad(regs_, _Rt_, (s16)psxMemRead16(_oB_)); } | |
811 | OP(psxLHUe) { if (checkLD(regs_, _oB_, 1)) doLoad(regs_, _Rt_, psxMemRead16(_oB_)); } | |
812 | OP(psxLWe) { if (checkLD(regs_, _oB_, 3)) doLoad(regs_, _Rt_, psxMemRead32(_oB_)); } | |
813 | ||
814 | static void doLWL(psxRegisters *regs, u32 rt, u32 addr) { | |
4cc373dd | 815 | static const u32 LWL_MASK[4] = { 0xffffff, 0xffff, 0xff, 0 }; |
816 | static const u32 LWL_SHIFT[4] = { 24, 16, 8, 0 }; | |
ef79bbde | 817 | u32 shift = addr & 3; |
bc7c5acb | 818 | u32 val, mem; |
819 | u32 oldval = regs->GPR.r[rt]; | |
ef79bbde | 820 | |
f9ae4f29 | 821 | #ifdef HANDLE_LOAD_DELAY |
bc7c5acb | 822 | int sel = regs->dloadSel; |
823 | if (regs->dloadReg[sel] == rt) | |
824 | oldval = regs->dloadVal[sel]; | |
f9ae4f29 | 825 | #endif |
bc7c5acb | 826 | mem = psxMemRead32(addr & ~3); |
f9ae4f29 | 827 | val = (oldval & LWL_MASK[shift]) | (mem << LWL_SHIFT[shift]); |
bc7c5acb | 828 | doLoad(regs, rt, val); |
ef79bbde P |
829 | |
830 | /* | |
831 | Mem = 1234. Reg = abcd | |
832 | ||
833 | 0 4bcd (mem << 24) | (reg & 0x00ffffff) | |
834 | 1 34cd (mem << 16) | (reg & 0x0000ffff) | |
835 | 2 234d (mem << 8) | (reg & 0x000000ff) | |
836 | 3 1234 (mem ) | (reg & 0x00000000) | |
837 | */ | |
838 | } | |
839 | ||
bc7c5acb | 840 | static void doLWR(psxRegisters *regs, u32 rt, u32 addr) { |
4cc373dd | 841 | static const u32 LWR_MASK[4] = { 0, 0xff000000, 0xffff0000, 0xffffff00 }; |
842 | static const u32 LWR_SHIFT[4] = { 0, 8, 16, 24 }; | |
ef79bbde | 843 | u32 shift = addr & 3; |
bc7c5acb | 844 | u32 val, mem; |
845 | u32 oldval = regs->GPR.r[rt]; | |
ef79bbde | 846 | |
f9ae4f29 | 847 | #ifdef HANDLE_LOAD_DELAY |
bc7c5acb | 848 | int sel = regs->dloadSel; |
849 | if (regs->dloadReg[sel] == rt) | |
850 | oldval = regs->dloadVal[sel]; | |
f9ae4f29 | 851 | #endif |
bc7c5acb | 852 | mem = psxMemRead32(addr & ~3); |
f9ae4f29 | 853 | val = (oldval & LWR_MASK[shift]) | (mem >> LWR_SHIFT[shift]); |
bc7c5acb | 854 | doLoad(regs, rt, val); |
ef79bbde P |
855 | |
856 | /* | |
857 | Mem = 1234. Reg = abcd | |
858 | ||
859 | 0 1234 (mem ) | (reg & 0x00000000) | |
860 | 1 a123 (mem >> 8) | (reg & 0xff000000) | |
861 | 2 ab12 (mem >> 16) | (reg & 0xffff0000) | |
862 | 3 abc1 (mem >> 24) | (reg & 0xffffff00) | |
863 | */ | |
864 | } | |
865 | ||
bc7c5acb | 866 | OP(psxLWL) { doLWL(regs_, _Rt_, _oB_); } |
867 | OP(psxLWR) { doLWR(regs_, _Rt_, _oB_); } | |
ef79bbde | 868 | |
bc7c5acb | 869 | OP(psxLWLe) { if (checkLD(regs_, _oB_ & ~3, 0)) doLWL(regs_, _Rt_, _oB_); } |
870 | OP(psxLWRe) { if (checkLD(regs_, _oB_ , 0)) doLWR(regs_, _Rt_, _oB_); } | |
ef79bbde | 871 | |
bc7c5acb | 872 | OP(psxSB) { psxMemWrite8 (_oB_, _rRt_ & 0xff); } |
873 | OP(psxSH) { psxMemWrite16(_oB_, _rRt_ & 0xffff); } | |
874 | OP(psxSW) { psxMemWrite32(_oB_, _rRt_); } | |
875 | ||
876 | OP(psxSBe) { if (checkST(regs_, _oB_, 0)) psxMemWrite8 (_oB_, _rRt_ & 0xff); } | |
877 | OP(psxSHe) { if (checkST(regs_, _oB_, 1)) psxMemWrite16(_oB_, _rRt_ & 0xffff); } | |
878 | OP(psxSWe) { if (checkST(regs_, _oB_, 3)) psxMemWrite32(_oB_, _rRt_); } | |
879 | ||
880 | static void doSWL(psxRegisters *regs, u32 rt, u32 addr) { | |
881 | u32 val = regs->GPR.r[rt]; | |
882 | switch (addr & 3) { | |
883 | case 0: psxMemWrite8( addr , val >> 24); break; | |
884 | case 1: psxMemWrite16(addr & ~3, val >> 16); break; | |
885 | case 2: // revisit: should be a single 24bit write | |
886 | psxMemWrite16(addr & ~3, (val >> 8) & 0xffff); | |
887 | psxMemWrite8( addr , val >> 24); break; | |
888 | case 3: psxMemWrite32(addr & ~3, val); break; | |
889 | } | |
ef79bbde P |
890 | /* |
891 | Mem = 1234. Reg = abcd | |
892 | ||
893 | 0 123a (reg >> 24) | (mem & 0xffffff00) | |
894 | 1 12ab (reg >> 16) | (mem & 0xffff0000) | |
895 | 2 1abc (reg >> 8) | (mem & 0xff000000) | |
896 | 3 abcd (reg ) | (mem & 0x00000000) | |
897 | */ | |
898 | } | |
899 | ||
bc7c5acb | 900 | static void doSWR(psxRegisters *regs, u32 rt, u32 addr) { |
901 | u32 val = regs->GPR.r[rt]; | |
902 | switch (addr & 3) { | |
903 | case 0: psxMemWrite32(addr , val); break; | |
904 | case 1: // revisit: should be a single 24bit write | |
905 | psxMemWrite8 (addr , val & 0xff); | |
906 | psxMemWrite16(addr + 1, (val >> 8) & 0xffff); break; | |
907 | case 2: psxMemWrite16(addr , val & 0xffff); break; | |
908 | case 3: psxMemWrite8 (addr , val & 0xff); break; | |
909 | } | |
ef79bbde P |
910 | |
911 | /* | |
912 | Mem = 1234. Reg = abcd | |
913 | ||
914 | 0 abcd (reg ) | (mem & 0x00000000) | |
915 | 1 bcd4 (reg << 8) | (mem & 0x000000ff) | |
916 | 2 cd34 (reg << 16) | (mem & 0x0000ffff) | |
917 | 3 d234 (reg << 24) | (mem & 0x00ffffff) | |
918 | */ | |
919 | } | |
920 | ||
bc7c5acb | 921 | OP(psxSWL) { doSWL(regs_, _Rt_, _oB_); } |
922 | OP(psxSWR) { doSWR(regs_, _Rt_, _oB_); } | |
923 | ||
924 | OP(psxSWLe) { if (checkST(regs_, _oB_ & ~3, 0)) doSWL(regs_, _Rt_, _oB_); } | |
925 | OP(psxSWRe) { if (checkST(regs_, _oB_ , 0)) doSWR(regs_, _Rt_, _oB_); } | |
926 | ||
ef79bbde P |
927 | /********************************************************* |
928 | * Moves between GPR and COPx * | |
929 | * Format: OP rt, fs * | |
930 | *********************************************************/ | |
905b7c25 | 931 | OP(psxMFC0) { |
932 | u32 r = _Rd_; | |
933 | #ifdef DO_EXCEPTION_RESERVEDI | |
bc7c5acb | 934 | if (unlikely(0x00000417u & (1u << r))) |
935 | intExceptionInsn(regs_, R3000E_RI << 2); | |
905b7c25 | 936 | #endif |
f9ae4f29 | 937 | doLoad(regs_, _Rt_, regs_->CP0.r[r]); |
905b7c25 | 938 | } |
939 | ||
905b7c25 | 940 | static void setupCop(u32 sr); |
941 | ||
4cc373dd | 942 | void MTC0(psxRegisters *regs_, int reg, u32 val) { |
ef79bbde P |
943 | // SysPrintf("MTC0 %d: %x\n", reg, val); |
944 | switch (reg) { | |
bc7c5acb | 945 | case 12: // SR |
946 | if (unlikely((regs_->CP0.n.SR ^ val) & (1 << 16))) | |
679d5ee3 | 947 | psxMemOnIsolate((val >> 16) & 1); |
bc7c5acb | 948 | if (unlikely((regs_->CP0.n.SR ^ val) & (7 << 29))) |
905b7c25 | 949 | setupCop(val); |
bc7c5acb | 950 | regs_->CP0.n.SR = val; |
905b7c25 | 951 | psxTestSWInts(regs_, 1); |
ef79bbde P |
952 | break; |
953 | ||
954 | case 13: // Cause | |
4cc373dd | 955 | regs_->CP0.n.Cause &= ~0x0300; |
956 | regs_->CP0.n.Cause |= val & 0x0300; | |
905b7c25 | 957 | psxTestSWInts(regs_, 0); |
ef79bbde P |
958 | break; |
959 | ||
bc7c5acb | 960 | case 7: |
961 | if ((regs_->CP0.n.DCIC ^ val) & 0xff800000) | |
962 | log_unhandled("DCIC: %08x->%08x\n", regs_->CP0.n.DCIC, val); | |
963 | // fallthrough | |
ef79bbde | 964 | default: |
4cc373dd | 965 | regs_->CP0.r[reg] = val; |
ef79bbde P |
966 | break; |
967 | } | |
968 | } | |
969 | ||
4cc373dd | 970 | OP(psxMTC0) { MTC0(regs_, _Rd_, _u32(_rRt_)); } |
ef79bbde | 971 | |
bc7c5acb | 972 | // no exception |
973 | static inline void psxNULLne(psxRegisters *regs) { | |
974 | log_unhandled("unhandled op %08x @%08x\n", regs->code, regs->pc - 4); | |
975 | } | |
976 | ||
ef79bbde | 977 | /********************************************************* |
905b7c25 | 978 | * Unknown instruction (would generate an exception) * |
ef79bbde P |
979 | * Format: ? * |
980 | *********************************************************/ | |
905b7c25 | 981 | |
982 | OP(psxNULL) { | |
bc7c5acb | 983 | psxNULLne(regs_); |
905b7c25 | 984 | #ifdef DO_EXCEPTION_RESERVEDI |
bc7c5acb | 985 | intExceptionInsn(regs_, R3000E_RI << 2); |
ef79bbde P |
986 | #endif |
987 | } | |
988 | ||
905b7c25 | 989 | void gteNULL(struct psxCP2Regs *regs) { |
bc7c5acb | 990 | psxRegisters *regs_ = (psxRegisters *)((u8 *)regs - offsetof(psxRegisters, CP2)); |
991 | psxNULLne(regs_); | |
905b7c25 | 992 | } |
ef79bbde | 993 | |
4cc373dd | 994 | OP(psxSPECIAL) { |
995 | psxSPC[_Funct_](regs_, code); | |
ef79bbde P |
996 | } |
997 | ||
4cc373dd | 998 | OP(psxCOP0) { |
3d1c03e7 | 999 | u32 rs = _Rs_; |
1000 | if (rs & 0x10) { | |
1001 | u32 op2 = code & 0x1f; | |
1002 | switch (op2) { | |
1003 | case 0x01: | |
1004 | case 0x02: | |
1005 | case 0x06: | |
1006 | case 0x08: psxNULL(regs_, code); break; | |
1007 | case 0x10: psxRFE(regs_, code); break; | |
1008 | default: psxNULLne(regs_); break; | |
1009 | } | |
1010 | return; | |
1011 | } | |
1012 | switch (rs) { | |
4cc373dd | 1013 | case 0x00: psxMFC0(regs_, code); break; |
4cc373dd | 1014 | case 0x04: psxMTC0(regs_, code); break; |
3d1c03e7 | 1015 | case 0x02: // CFC |
1016 | case 0x06: psxNULL(regs_, code); break; // CTC -> exception | |
1017 | case 0x08: | |
1018 | case 0x0c: log_unhandled("BC0 %08x @%08x\n", code, regs_->pc - 4); | |
bc7c5acb | 1019 | default: psxNULLne(regs_); break; |
4cc373dd | 1020 | } |
ef79bbde P |
1021 | } |
1022 | ||
905b7c25 | 1023 | OP(psxCOP1) { |
1024 | // ??? what actually happens here? | |
bc7c5acb | 1025 | log_unhandled("COP1 %08x @%08x\n", code, regs_->pc - 4); |
905b7c25 | 1026 | } |
1027 | ||
4cc373dd | 1028 | OP(psxCOP2) { |
3d1c03e7 | 1029 | u32 rt = _Rt_, rd = _Rd_, rs = _Rs_; |
1030 | if (rs & 0x10) { | |
1031 | psxCP2[_Funct_](®s_->CP2); | |
1032 | return; | |
1033 | } | |
1034 | switch (rs) { | |
1035 | case 0x00: doLoad(regs_, rt, MFC2(®s_->CP2, rd)); break; // MFC2 | |
1036 | case 0x02: doLoad(regs_, rt, regs_->CP2C.r[rd]); break; // CFC2 | |
1037 | case 0x04: MTC2(®s_->CP2, regs_->GPR.r[rt], rd); break; // MTC2 | |
1038 | case 0x06: CTC2(®s_->CP2, regs_->GPR.r[rt], rd); break; // CTC2 | |
1039 | case 0x08: | |
1040 | case 0x0c: log_unhandled("BC2 %08x @%08x\n", code, regs_->pc - 4); | |
1041 | default: psxNULLne(regs_); break; | |
1042 | } | |
32631e6a | 1043 | } |
1044 | ||
4cc373dd | 1045 | OP(psxCOP2_stall) { |
81dbbf4c | 1046 | u32 f = _Funct_; |
32631e6a | 1047 | gteCheckStall(f); |
3d1c03e7 | 1048 | psxCOP2(regs_, code); |
4cc373dd | 1049 | } |
1050 | ||
1051 | OP(gteLWC2) { | |
1052 | MTC2(®s_->CP2, psxMemRead32(_oB_), _Rt_); | |
1053 | } | |
1054 | ||
4cc373dd | 1055 | OP(gteLWC2_stall) { |
1056 | gteCheckStall(0); | |
1057 | gteLWC2(regs_, code); | |
ef79bbde P |
1058 | } |
1059 | ||
bc7c5acb | 1060 | OP(gteLWC2e_stall) { |
1061 | gteCheckStall(0); | |
1062 | if (checkLD(regs_, _oB_, 3)) | |
1063 | MTC2(®s_->CP2, psxMemRead32(_oB_), _Rt_); | |
1064 | } | |
1065 | ||
1066 | OP(gteSWC2) { | |
1067 | psxMemWrite32(_oB_, MFC2(®s_->CP2, _Rt_)); | |
1068 | } | |
1069 | ||
4cc373dd | 1070 | OP(gteSWC2_stall) { |
1071 | gteCheckStall(0); | |
1072 | gteSWC2(regs_, code); | |
1073 | } | |
1074 | ||
bc7c5acb | 1075 | OP(gteSWC2e_stall) { |
1076 | gteCheckStall(0); | |
1077 | if (checkST(regs_, _oB_, 3)) | |
1078 | gteSWC2(regs_, code); | |
1079 | } | |
1080 | ||
905b7c25 | 1081 | OP(psxCOP3) { |
1082 | // ??? what actually happens here? | |
bc7c5acb | 1083 | log_unhandled("COP3 %08x @%08x\n", code, regs_->pc - 4); |
905b7c25 | 1084 | } |
1085 | ||
bc7c5acb | 1086 | OP(psxCOPd) { |
1087 | log_unhandled("disabled cop%d @%08x\n", (code >> 26) & 3, regs_->pc - 4); | |
905b7c25 | 1088 | #ifdef DO_EXCEPTION_RESERVEDI |
bc7c5acb | 1089 | intExceptionInsn(regs_, R3000E_CpU << 2); |
905b7c25 | 1090 | #endif |
1091 | } | |
1092 | ||
1093 | OP(psxLWCx) { | |
bc7c5acb | 1094 | log_unhandled("LWCx %08x @%08x\n", code, regs_->pc - 4); |
1095 | checkLD(regs_, _oB_, 3); | |
905b7c25 | 1096 | } |
1097 | ||
1098 | OP(psxSWCx) { | |
1099 | // does this write something to memory? | |
bc7c5acb | 1100 | log_unhandled("SWCx %08x @%08x\n", code, regs_->pc - 4); |
1101 | checkST(regs_, _oB_, 3); | |
905b7c25 | 1102 | } |
1103 | ||
4cc373dd | 1104 | OP(psxREGIMM) { |
19fae7fc | 1105 | u32 rt = _Rt_; |
1106 | switch (rt) { | |
4cc373dd | 1107 | case 0x10: psxBLTZAL(regs_, code); break; |
1108 | case 0x11: psxBGEZAL(regs_, code); break; | |
19fae7fc | 1109 | default: |
1110 | if (rt & 1) | |
1111 | psxBGEZ(regs_, code); | |
1112 | else | |
1113 | psxBLTZ(regs_, code); | |
4cc373dd | 1114 | } |
ef79bbde P |
1115 | } |
1116 | ||
4cc373dd | 1117 | OP(psxHLE) { |
905b7c25 | 1118 | u32 hleCode; |
1119 | if (unlikely(!Config.HLE)) { | |
1120 | psxSWCx(regs_, code); | |
1121 | return; | |
1122 | } | |
1123 | hleCode = code & 0x03ffffff; | |
1124 | if (hleCode >= (sizeof(psxHLEt) / sizeof(psxHLEt[0]))) { | |
1125 | psxSWCx(regs_, code); | |
1126 | return; | |
1127 | } | |
1128 | psxHLEt[hleCode](); | |
ef79bbde P |
1129 | } |
1130 | ||
4cc373dd | 1131 | static void (INT_ATTR *psxBSC[64])(psxRegisters *regs_, u32 code) = { |
ef79bbde P |
1132 | psxSPECIAL, psxREGIMM, psxJ , psxJAL , psxBEQ , psxBNE , psxBLEZ, psxBGTZ, |
1133 | psxADDI , psxADDIU , psxSLTI, psxSLTIU, psxANDI, psxORI , psxXORI, psxLUI , | |
bc7c5acb | 1134 | psxCOP0 , psxCOPd , psxCOP2, psxCOPd, psxNULL, psxNULL, psxNULL, psxNULL, |
1135 | psxNULL , psxNULL , psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, psxNULL, | |
1136 | psxLB , psxLH , psxLWL , psxLW , psxLBU , psxLHU , psxLWR , psxNULL, | |
1137 | psxSB , psxSH , psxSWL , psxSW , psxNULL, psxNULL, psxSWR , psxNULL, | |
1138 | psxLWCx , psxLWCx , gteLWC2, psxLWCx , psxNULL, psxNULL, psxNULL, psxNULL, | |
1139 | psxSWCx , psxSWCx , gteSWC2, psxHLE , psxNULL, psxNULL, psxNULL, psxNULL, | |
ef79bbde P |
1140 | }; |
1141 | ||
4cc373dd | 1142 | static void (INT_ATTR *psxSPC[64])(psxRegisters *regs_, u32 code) = { |
ef79bbde P |
1143 | psxSLL , psxNULL , psxSRL , psxSRA , psxSLLV , psxNULL , psxSRLV, psxSRAV, |
1144 | psxJR , psxJALR , psxNULL, psxNULL, psxSYSCALL, psxBREAK, psxNULL, psxNULL, | |
1145 | psxMFHI, psxMTHI , psxMFLO, psxMTLO, psxNULL , psxNULL , psxNULL, psxNULL, | |
1146 | psxMULT, psxMULTU, psxDIV , psxDIVU, psxNULL , psxNULL , psxNULL, psxNULL, | |
1147 | psxADD , psxADDU , psxSUB , psxSUBU, psxAND , psxOR , psxXOR , psxNOR , | |
1148 | psxNULL, psxNULL , psxSLT , psxSLTU, psxNULL , psxNULL , psxNULL, psxNULL, | |
1149 | psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL, | |
1150 | psxNULL, psxNULL , psxNULL, psxNULL, psxNULL , psxNULL , psxNULL, psxNULL | |
1151 | }; | |
1152 | ||
6c0eefaf | 1153 | void (*psxCP2[64])(struct psxCP2Regs *regs) = { |
3d1c03e7 | 1154 | gteNULL , gteRTPS , gteNULL , gteNULL, gteNULL, gteNULL , gteNCLIP, gteNULL, // 00 |
4cc373dd | 1155 | gteNULL , gteNULL , gteNULL , gteNULL, gteOP , gteNULL , gteNULL , gteNULL, // 08 |
1156 | gteDPCS , gteINTPL, gteMVMVA, gteNCDS, gteCDP , gteNULL , gteNCDT , gteNULL, // 10 | |
1157 | gteNULL , gteNULL , gteNULL , gteNCCS, gteCC , gteNULL , gteNCS , gteNULL, // 18 | |
1158 | gteNCT , gteNULL , gteNULL , gteNULL, gteNULL, gteNULL , gteNULL , gteNULL, // 20 | |
1159 | gteSQR , gteDCPL , gteDPCT , gteNULL, gteNULL, gteAVSZ3, gteAVSZ4, gteNULL, // 28 | |
1160 | gteRTPT , gteNULL , gteNULL , gteNULL, gteNULL, gteNULL , gteNULL , gteNULL, // 30 | |
1161 | gteNULL , gteNULL , gteNULL , gteNULL, gteNULL, gteGPF , gteGPL , gteNCCT // 38 | |
ef79bbde P |
1162 | }; |
1163 | ||
ef79bbde P |
1164 | /////////////////////////////////////////// |
1165 | ||
1166 | static int intInit() { | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | static void intReset() { | |
f9ae4f29 | 1171 | dloadClear(&psxRegs); |
3d1c03e7 | 1172 | psxRegs.subCycle = 0; |
ef79bbde P |
1173 | } |
1174 | ||
bc7c5acb | 1175 | static inline void execI_(u8 **memRLUT, psxRegisters *regs) { |
1176 | u32 pc = regs->pc; | |
905b7c25 | 1177 | |
bc7c5acb | 1178 | addCycle(regs); |
1179 | dloadStep(regs); | |
4cc373dd | 1180 | |
bc7c5acb | 1181 | regs->pc += 4; |
1182 | regs->code = fetch(regs, memRLUT, pc); | |
1183 | psxBSC[regs->code >> 26](regs, regs->code); | |
1184 | } | |
1185 | ||
1186 | static inline void execIbp(u8 **memRLUT, psxRegisters *regs) { | |
1187 | u32 pc = regs->pc; | |
1188 | ||
1189 | addCycle(regs); | |
1190 | dloadStep(regs); | |
1191 | ||
1192 | if (execBreakCheck(regs, pc)) | |
1193 | return; | |
1194 | ||
1195 | regs->pc += 4; | |
1196 | regs->code = fetch(regs, memRLUT, pc); | |
1197 | psxBSC[regs->code >> 26](regs, regs->code); | |
4cc373dd | 1198 | } |
1199 | ||
1200 | static void intExecute() { | |
1201 | psxRegisters *regs_ = &psxRegs; | |
1202 | u8 **memRLUT = psxMemRLUT; | |
796a91ef | 1203 | extern int stop; |
4cc373dd | 1204 | |
1205 | while (!stop) | |
1206 | execI_(memRLUT, regs_); | |
ef79bbde P |
1207 | } |
1208 | ||
bc7c5acb | 1209 | static void intExecuteBp() { |
1210 | psxRegisters *regs_ = &psxRegs; | |
1211 | u8 **memRLUT = psxMemRLUT; | |
1212 | extern int stop; | |
1213 | ||
1214 | while (!stop) | |
1215 | execIbp(memRLUT, regs_); | |
1216 | } | |
1217 | ||
da65071f | 1218 | void intExecuteBlock(enum blockExecCaller caller) { |
4cc373dd | 1219 | psxRegisters *regs_ = &psxRegs; |
1220 | u8 **memRLUT = psxMemRLUT; | |
1221 | ||
bc7c5acb | 1222 | branchSeen = 0; |
1223 | while (!branchSeen) | |
4cc373dd | 1224 | execI_(memRLUT, regs_); |
ef79bbde P |
1225 | } |
1226 | ||
1227 | static void intClear(u32 Addr, u32 Size) { | |
1228 | } | |
1229 | ||
980f7a58 | 1230 | static void intNotify(enum R3000Anote note, void *data) { |
1231 | switch (note) { | |
f9ae4f29 | 1232 | case R3000ACPU_NOTIFY_BEFORE_SAVE: |
1233 | dloadFlush(&psxRegs); | |
1234 | break; | |
980f7a58 | 1235 | case R3000ACPU_NOTIFY_AFTER_LOAD: |
f9ae4f29 | 1236 | dloadClear(&psxRegs); |
3d1c03e7 | 1237 | psxRegs.subCycle = 0; |
bc7c5acb | 1238 | setupCop(psxRegs.CP0.n.SR); |
905b7c25 | 1239 | // fallthrough |
1240 | case R3000ACPU_NOTIFY_CACHE_ISOLATED: // Armored Core? | |
9f84fc93 | 1241 | memset(&ICache, 0xff, sizeof(ICache)); |
980f7a58 | 1242 | break; |
1243 | case R3000ACPU_NOTIFY_CACHE_UNISOLATED: | |
980f7a58 | 1244 | break; |
943a507a | 1245 | } |
943a507a | 1246 | } |
1247 | ||
905b7c25 | 1248 | static void setupCop(u32 sr) |
1249 | { | |
1250 | if (sr & (1u << 29)) | |
1251 | psxBSC[17] = psxCOP1; | |
1252 | else | |
bc7c5acb | 1253 | psxBSC[17] = psxCOPd; |
905b7c25 | 1254 | if (sr & (1u << 30)) |
1255 | psxBSC[18] = Config.DisableStalls ? psxCOP2 : psxCOP2_stall; | |
1256 | else | |
bc7c5acb | 1257 | psxBSC[18] = psxCOPd; |
905b7c25 | 1258 | if (sr & (1u << 31)) |
1259 | psxBSC[19] = psxCOP3; | |
1260 | else | |
bc7c5acb | 1261 | psxBSC[19] = psxCOPd; |
905b7c25 | 1262 | } |
1263 | ||
61ad2a61 | 1264 | void intApplyConfig() { |
d5aeda23 | 1265 | int cycle_mult; |
1266 | ||
32631e6a | 1267 | assert(psxSPC[16] == psxMFHI || psxSPC[16] == psxMFHI_stall); |
1268 | assert(psxSPC[18] == psxMFLO || psxSPC[18] == psxMFLO_stall); | |
1269 | assert(psxSPC[24] == psxMULT || psxSPC[24] == psxMULT_stall); | |
1270 | assert(psxSPC[25] == psxMULTU || psxSPC[25] == psxMULTU_stall); | |
1271 | assert(psxSPC[26] == psxDIV || psxSPC[26] == psxDIV_stall); | |
1272 | assert(psxSPC[27] == psxDIVU || psxSPC[27] == psxDIVU_stall); | |
1273 | ||
1274 | if (Config.DisableStalls) { | |
1275 | psxBSC[18] = psxCOP2; | |
1276 | psxBSC[50] = gteLWC2; | |
1277 | psxBSC[58] = gteSWC2; | |
1278 | psxSPC[16] = psxMFHI; | |
1279 | psxSPC[18] = psxMFLO; | |
1280 | psxSPC[24] = psxMULT; | |
1281 | psxSPC[25] = psxMULTU; | |
1282 | psxSPC[26] = psxDIV; | |
1283 | psxSPC[27] = psxDIVU; | |
1284 | } else { | |
1285 | psxBSC[18] = psxCOP2_stall; | |
1286 | psxBSC[50] = gteLWC2_stall; | |
1287 | psxBSC[58] = gteSWC2_stall; | |
1288 | psxSPC[16] = psxMFHI_stall; | |
1289 | psxSPC[18] = psxMFLO_stall; | |
1290 | psxSPC[24] = psxMULT_stall; | |
1291 | psxSPC[25] = psxMULTU_stall; | |
1292 | psxSPC[26] = psxDIV_stall; | |
1293 | psxSPC[27] = psxDIVU_stall; | |
1294 | } | |
bc7c5acb | 1295 | setupCop(psxRegs.CP0.n.SR); |
1296 | ||
1297 | if (Config.PreciseExceptions) { | |
1298 | psxBSC[0x20] = psxLBe; | |
1299 | psxBSC[0x21] = psxLHe; | |
1300 | psxBSC[0x22] = psxLWLe; | |
1301 | psxBSC[0x23] = psxLWe; | |
1302 | psxBSC[0x24] = psxLBUe; | |
1303 | psxBSC[0x25] = psxLHUe; | |
1304 | psxBSC[0x26] = psxLWRe; | |
1305 | psxBSC[0x28] = psxSBe; | |
1306 | psxBSC[0x29] = psxSHe; | |
1307 | psxBSC[0x2a] = psxSWLe; | |
1308 | psxBSC[0x2b] = psxSWe; | |
1309 | psxBSC[0x2e] = psxSWRe; | |
1310 | psxBSC[0x32] = gteLWC2e_stall; | |
1311 | psxBSC[0x3a] = gteSWC2e_stall; | |
1312 | psxSPC[0x08] = psxJRe; | |
1313 | psxSPC[0x09] = psxJALRe; | |
1314 | psxInt.Execute = intExecuteBp; | |
1315 | } else { | |
1316 | psxBSC[0x20] = psxLB; | |
1317 | psxBSC[0x21] = psxLH; | |
1318 | psxBSC[0x22] = psxLWL; | |
1319 | psxBSC[0x23] = psxLW; | |
1320 | psxBSC[0x24] = psxLBU; | |
1321 | psxBSC[0x25] = psxLHU; | |
1322 | psxBSC[0x26] = psxLWR; | |
1323 | psxBSC[0x28] = psxSB; | |
1324 | psxBSC[0x29] = psxSH; | |
1325 | psxBSC[0x2a] = psxSWL; | |
1326 | psxBSC[0x2b] = psxSW; | |
1327 | psxBSC[0x2e] = psxSWR; | |
1328 | // LWC2, SWC2 handled by Config.DisableStalls | |
1329 | psxSPC[0x08] = psxJR; | |
1330 | psxSPC[0x09] = psxJALR; | |
1331 | psxInt.Execute = intExecute; | |
1332 | } | |
61ad2a61 | 1333 | |
bc7c5acb | 1334 | // the dynarec may occasionally call the interpreter, in such a case the |
61ad2a61 | 1335 | // cache won't work (cache only works right if all fetches go through it) |
1336 | if (!Config.icache_emulation || psxCpu != &psxInt) | |
1337 | fetch = fetchNoCache; | |
1338 | else | |
1339 | fetch = fetchICache; | |
d5aeda23 | 1340 | |
1341 | cycle_mult = Config.cycle_multiplier_override && Config.cycle_multiplier == CYCLE_MULT_DEFAULT | |
1342 | ? Config.cycle_multiplier_override : Config.cycle_multiplier; | |
1343 | psxRegs.subCycleStep = 0x10000 * cycle_mult / 100; | |
32631e6a | 1344 | } |
1345 | ||
ef79bbde P |
1346 | static void intShutdown() { |
1347 | } | |
1348 | ||
4cc373dd | 1349 | // single step (may do several ops in case of a branch) |
bc7c5acb | 1350 | void execI(psxRegisters *regs) { |
1351 | execI_(psxMemRLUT, regs); | |
1352 | dloadFlush(regs); | |
ef79bbde P |
1353 | } |
1354 | ||
1355 | R3000Acpu psxInt = { | |
1356 | intInit, | |
1357 | intReset, | |
1358 | intExecute, | |
1359 | intExecuteBlock, | |
1360 | intClear, | |
943a507a | 1361 | intNotify, |
61ad2a61 | 1362 | intApplyConfig, |
ef79bbde P |
1363 | intShutdown |
1364 | }; |