notaz.gp2x.de / picodrive.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
32x: some missed code from MAME, minor tweaks
[picodrive.git] / pico / carthw / svp / compiler.c
CommitLineData
65ca3034 1// SSP1601 to ARM recompiler
2
3// (c) Copyright 2008, Grazvydas "notaz" Ignotas
4// Free for non-commercial use.
726bbb3e 5
efcba75f 6#include "../../pico_int.h"
e807ac75 7#include "compiler.h"
726bbb3e 8
71bb1b7b 9#define u32 unsigned int
10
71bb1b7b 11static u32 *tcache_ptr = NULL;
726bbb3e 12
726bbb3e 13static int nblocks = 0;
71bb1b7b 14static int n_in_ops = 0;
15
16extern ssp1601_t *ssp;
17
18#define rPC ssp->gr[SSP_PC].h
19#define rPMC ssp->gr[SSP_PMC]
20
21#define SSP_FLAG_Z (1<<0xd)
22#define SSP_FLAG_N (1<<0xf)
726bbb3e 23
5d817c91 24#ifndef ARM
0b5e8296 25#define DUMP_BLOCK 0x0c9a
84100c0f 26u32 tcache[SSP_TCACHE_SIZE/4];
1ca2ea4f 27u32 *ssp_block_table[0x5090/2];
28u32 *ssp_block_table_iram[15][0x800/2];
84100c0f 29char ssp_align[SSP_BLOCKTAB_ALIGN_SIZE];
45883918 30void ssp_drc_next(void){}
31void ssp_drc_next_patch(void){}
32void ssp_drc_end(void){}
5d817c91 33#endif
34
5c129565 35#include "gen_arm.c"
726bbb3e 36
37// -----------------------------------------------------
38
71bb1b7b 39static int get_inc(int mode)
892b1dd2 40{
71bb1b7b 41 int inc = (mode >> 11) & 7;
42 if (inc != 0) {
43 if (inc != 7) inc--;
44 inc = 1 << inc; // 0 1 2 4 8 16 32 128
45 if (mode & 0x8000) inc = -inc; // decrement mode
892b1dd2 46 }
71bb1b7b 47 return inc;
892b1dd2 48}
49
ee9ee9fd 50u32 ssp_pm_read(int reg)
d5276282 51{
52 u32 d = 0, mode;
53
54 if (ssp->emu_status & SSP_PMC_SET)
55 {
56 ssp->pmac_read[reg] = rPMC.v;
57 ssp->emu_status &= ~SSP_PMC_SET;
d5276282 58 return 0;
59 }
60
d5276282 61 // just in case
62 ssp->emu_status &= ~SSP_PMC_HAVE_ADDR;
63
64 mode = ssp->pmac_read[reg]>>16;
65 if ((mode & 0xfff0) == 0x0800) // ROM
66 {
67 d = ((unsigned short *)Pico.rom)[ssp->pmac_read[reg]&0xfffff];
68 ssp->pmac_read[reg] += 1;
69 }
70 else if ((mode & 0x47ff) == 0x0018) // DRAM
71 {
72 unsigned short *dram = (unsigned short *)svp->dram;
73 int inc = get_inc(mode);
74 d = dram[ssp->pmac_read[reg]&0xffff];
75 ssp->pmac_read[reg] += inc;
76 }
77
78 // PMC value corresponds to last PMR accessed
79 rPMC.v = ssp->pmac_read[reg];
80
81 return d;
82}
83
71bb1b7b 84#define overwrite_write(dst, d) \
85{ \
86 if (d & 0xf000) { dst &= ~0xf000; dst |= d & 0xf000; } \
87 if (d & 0x0f00) { dst &= ~0x0f00; dst |= d & 0x0f00; } \
88 if (d & 0x00f0) { dst &= ~0x00f0; dst |= d & 0x00f0; } \
89 if (d & 0x000f) { dst &= ~0x000f; dst |= d & 0x000f; } \
90}
91
ee9ee9fd 92void ssp_pm_write(u32 d, int reg)
d5276282 93{
94 unsigned short *dram;
95 int mode, addr;
96
97 if (ssp->emu_status & SSP_PMC_SET)
98 {
99 ssp->pmac_write[reg] = rPMC.v;
100 ssp->emu_status &= ~SSP_PMC_SET;
101 return;
102 }
103
104 // just in case
105 ssp->emu_status &= ~SSP_PMC_HAVE_ADDR;
106
107 dram = (unsigned short *)svp->dram;
108 mode = ssp->pmac_write[reg]>>16;
109 addr = ssp->pmac_write[reg]&0xffff;
110 if ((mode & 0x43ff) == 0x0018) // DRAM
111 {
112 int inc = get_inc(mode);
113 if (mode & 0x0400) {
114 overwrite_write(dram[addr], d);
115 } else dram[addr] = d;
116 ssp->pmac_write[reg] += inc;
117 }
118 else if ((mode & 0xfbff) == 0x4018) // DRAM, cell inc
119 {
120 if (mode & 0x0400) {
121 overwrite_write(dram[addr], d);
122 } else dram[addr] = d;
34e243f1 123 ssp->pmac_write[reg] += (addr&1) ? 0x1f : 1;
d5276282 124 }
125 else if ((mode & 0x47ff) == 0x001c) // IRAM
126 {
127 int inc = get_inc(mode);
128 ((unsigned short *)svp->iram_rom)[addr&0x3ff] = d;
129 ssp->pmac_write[reg] += inc;
e122fae6 130 ssp->drc.iram_dirty = 1;
d5276282 131 }
132
133 rPMC.v = ssp->pmac_write[reg];
134}
135
136
892b1dd2 137// -----------------------------------------------------
138
0b5e8296 139// 14 IRAM blocks
df143b36 140static unsigned char iram_context_map[] =
141{
142 0, 0, 0, 0, 1, 0, 0, 0, // 04
143 0, 0, 0, 0, 0, 0, 2, 0, // 0e
144 0, 0, 0, 0, 0, 3, 0, 4, // 15 17
145 5, 0, 0, 6, 0, 7, 0, 0, // 18 1b 1d
146 8, 9, 0, 0, 0,10, 0, 0, // 20 21 25
147 0, 0, 0, 0, 0, 0, 0, 0,
148 0, 0,11, 0, 0,12, 0, 0, // 32 35
149 13,14, 0, 0, 0, 0, 0, 0 // 38 39
150};
151
71bb1b7b 152int ssp_get_iram_context(void)
df143b36 153{
154 unsigned char *ir = (unsigned char *)svp->iram_rom;
155 int val1, val = ir[0x083^1] + ir[0x4FA^1] + ir[0x5F7^1] + ir[0x47B^1];
df143b36 156 val1 = iram_context_map[(val>>1)&0x3f];
157
5c129565 158 if (val1 == 0) {
2d2247c2 159 elprintf(EL_ANOMALY, "svp: iram ctx val: %02x PC=%04x\n", (val>>1)&0x3f, rPC);
df143b36 160 //debug_dump2file(name, svp->iram_rom, 0x800);
2d2247c2 161 //exit(1);
df143b36 162 }
df143b36 163 return val1;
164}
165
5d817c91 166// -----------------------------------------------------
0b5e8296 167
5d817c91 168/* regs with known values */
169static struct
170{
171 ssp_reg_t gr[8];
172 unsigned char r[8];
ede7220f 173 unsigned int pmac_read[5];
174 unsigned int pmac_write[5];
d5276282 175 ssp_reg_t pmc;
ede7220f 176 unsigned int emu_status;
bad5731d 177} known_regs;
178
179#define KRREG_X (1 << SSP_X)
180#define KRREG_Y (1 << SSP_Y)
181#define KRREG_A (1 << SSP_A) /* AH only */
182#define KRREG_ST (1 << SSP_ST)
183#define KRREG_STACK (1 << SSP_STACK)
184#define KRREG_PC (1 << SSP_PC)
185#define KRREG_P (1 << SSP_P)
186#define KRREG_PR0 (1 << 8)
187#define KRREG_PR4 (1 << 12)
188#define KRREG_AL (1 << 16)
d5276282 189#define KRREG_PMCM (1 << 18) /* only mode word of PMC */
190#define KRREG_PMC (1 << 19)
ede7220f 191#define KRREG_PM0R (1 << 20)
192#define KRREG_PM1R (1 << 21)
193#define KRREG_PM2R (1 << 22)
194#define KRREG_PM3R (1 << 23)
195#define KRREG_PM4R (1 << 24)
196#define KRREG_PM0W (1 << 25)
197#define KRREG_PM1W (1 << 26)
198#define KRREG_PM2W (1 << 27)
199#define KRREG_PM3W (1 << 28)
200#define KRREG_PM4W (1 << 29)
bad5731d 201
202/* bitfield of known register values */
203static u32 known_regb = 0;
204
205/* known vals, which need to be flushed
d5276282 206 * (only ST, P, r0-r7, PMCx, PMxR, PMxW)
bad5731d 207 * ST means flags are being held in ARM PSR
89fea1e9 208 * P means that it needs to be recalculated
bad5731d 209 */
210static u32 dirty_regb = 0;
5d817c91 211
212/* known values of host regs.
d274c33b 213 * -1 - unknown
214 * 000000-00ffff - 16bit value
215 * 100000-10ffff - base reg (r7) + 16bit val
6e39239f 216 * 0r0000 - means reg (low) eq gr[r].h, r != AL
5d817c91 217 */
218static int hostreg_r[4];
219
220static void hostreg_clear(void)
221{
222 int i;
223 for (i = 0; i < 4; i++)
224 hostreg_r[i] = -1;
225}
226
6e39239f 227static void hostreg_sspreg_changed(int sspreg)
5d817c91 228{
229 int i;
230 for (i = 0; i < 4; i++)
6e39239f 231 if (hostreg_r[i] == (sspreg<<16)) hostreg_r[i] = -1;
5d817c91 232}
233
726bbb3e 234
ede7220f 235#define PROGRAM(x) ((unsigned short *)svp->iram_rom)[x]
236#define PROGRAM_P(x) ((unsigned short *)svp->iram_rom + (x))
726bbb3e 237
ee9ee9fd 238void tr_unhandled(void)
6e39239f 239{
2d2247c2 240 //FILE *f = fopen("tcache.bin", "wb");
241 //fwrite(tcache, 1, (tcache_ptr - tcache)*4, f);
242 //fclose(f);
243 elprintf(EL_ANOMALY, "unhandled @ %04x\n", known_regs.gr[SSP_PC].h<<1);
244 //exit(1);
6e39239f 245}
246
0e4d7ba5 247/* update P, if needed. Trashes r0 */
d274c33b 248static void tr_flush_dirty_P(void)
249{
250 // TODO: const regs
bad5731d 251 if (!(dirty_regb & KRREG_P)) return;
d274c33b 252 EOP_MOV_REG_ASR(10, 4, 16); // mov r10, r4, asr #16
0e4d7ba5 253 EOP_MOV_REG_LSL( 0, 4, 16); // mov r0, r4, lsl #16
254 EOP_MOV_REG_ASR( 0, 0, 15); // mov r0, r0, asr #15
255 EOP_MUL(10, 0, 10); // mul r10, r0, r10
bad5731d 256 dirty_regb &= ~KRREG_P;
0e4d7ba5 257 hostreg_r[0] = -1;
d274c33b 258}
259
89fea1e9 260/* write dirty pr to host reg. Nothing is trashed */
261static void tr_flush_dirty_pr(int r)
262{
263 int ror = 0, reg;
6e39239f 264
89fea1e9 265 if (!(dirty_regb & (1 << (r+8)))) return;
266
267 switch (r&3) {
268 case 0: ror = 0; break;
269 case 1: ror = 24/2; break;
270 case 2: ror = 16/2; break;
271 }
272 reg = (r < 4) ? 8 : 9;
273 EOP_BIC_IMM(reg,reg,ror,0xff);
274 if (known_regs.r[r] != 0)
275 EOP_ORR_IMM(reg,reg,ror,known_regs.r[r]);
276 dirty_regb &= ~(1 << (r+8));
277}
278
279/* write all dirty pr0-pr7 to host regs. Nothing is trashed */
280static void tr_flush_dirty_prs(void)
5d817c91 281{
282 int i, ror = 0, reg;
bad5731d 283 int dirty = dirty_regb >> 8;
2385f273 284 if ((dirty&7) == 7) {
285 emit_mov_const(A_COND_AL, 8, known_regs.r[0]|(known_regs.r[1]<<8)|(known_regs.r[2]<<16));
286 dirty &= ~7;
287 }
288 if ((dirty&0x70) == 0x70) {
289 emit_mov_const(A_COND_AL, 9, known_regs.r[4]|(known_regs.r[5]<<8)|(known_regs.r[6]<<16));
290 dirty &= ~0x70;
291 }
5d817c91 292 /* r0-r7 */
bad5731d 293 for (i = 0; dirty && i < 8; i++, dirty >>= 1)
5d817c91 294 {
bad5731d 295 if (!(dirty&1)) continue;
5d817c91 296 switch (i&3) {
297 case 0: ror = 0; break;
298 case 1: ror = 24/2; break;
299 case 2: ror = 16/2; break;
300 }
301 reg = (i < 4) ? 8 : 9;
302 EOP_BIC_IMM(reg,reg,ror,0xff);
bad5731d 303 if (known_regs.r[i] != 0)
304 EOP_ORR_IMM(reg,reg,ror,known_regs.r[i]);
5d817c91 305 }
bad5731d 306 dirty_regb &= ~0xff00;
307}
308
89fea1e9 309/* write dirty pr and "forget" it. Nothing is trashed. */
310static void tr_release_pr(int r)
311{
312 tr_flush_dirty_pr(r);
313 known_regb &= ~(1 << (r+8));
314}
315
6e39239f 316/* fush ARM PSR to r6. Trashes r1 */
bad5731d 317static void tr_flush_dirty_ST(void)
318{
319 if (!(dirty_regb & KRREG_ST)) return;
320 EOP_BIC_IMM(6,6,0,0x0f);
6e39239f 321 EOP_MRS(1);
322 EOP_ORR_REG_LSR(6,6,1,28);
bad5731d 323 dirty_regb &= ~KRREG_ST;
6e39239f 324 hostreg_r[1] = -1;
325}
326
327/* inverse of above. Trashes r1 */
328static void tr_make_dirty_ST(void)
329{
330 if (dirty_regb & KRREG_ST) return;
331 if (known_regb & KRREG_ST) {
332 int flags = 0;
333 if (known_regs.gr[SSP_ST].h & SSP_FLAG_N) flags |= 8;
334 if (known_regs.gr[SSP_ST].h & SSP_FLAG_Z) flags |= 4;
335 EOP_MSR_IMM(4/2, flags);
336 } else {
337 EOP_MOV_REG_LSL(1, 6, 28);
338 EOP_MSR_REG(1);
339 hostreg_r[1] = -1;
340 }
341 dirty_regb |= KRREG_ST;
bad5731d 342}
343
344/* load 16bit val into host reg r0-r3. Nothing is trashed */
345static void tr_mov16(int r, int val)
346{
347 if (hostreg_r[r] != val) {
348 emit_mov_const(A_COND_AL, r, val);
349 hostreg_r[r] = val;
350 }
351}
352
353static void tr_mov16_cond(int cond, int r, int val)
354{
355 emit_mov_const(cond, r, val);
a6fb500b 356 hostreg_r[r] = -1;
5d817c91 357}
358
45883918 359/* trashes r1 */
ede7220f 360static void tr_flush_dirty_pmcrs(void)
361{
362 u32 i, val = (u32)-1;
d5276282 363 if (!(dirty_regb & 0x3ff80000)) return;
ede7220f 364
d5276282 365 if (dirty_regb & KRREG_PMC) {
366 val = known_regs.pmc.v;
e122fae6 367 emit_mov_const(A_COND_AL, 1, val);
368 EOP_STR_IMM(1,7,0x400+SSP_PMC*4);
ede7220f 369
d5276282 370 if (known_regs.emu_status & (SSP_PMC_SET|SSP_PMC_HAVE_ADDR)) {
2d2247c2 371 elprintf(EL_ANOMALY, "!! SSP_PMC_SET|SSP_PMC_HAVE_ADDR set on flush\n");
d5276282 372 tr_unhandled();
373 }
ede7220f 374 }
375 for (i = 0; i < 5; i++)
376 {
d5276282 377 if (dirty_regb & (1 << (20+i))) {
ede7220f 378 if (val != known_regs.pmac_read[i]) {
379 val = known_regs.pmac_read[i];
e122fae6 380 emit_mov_const(A_COND_AL, 1, val);
ede7220f 381 }
e122fae6 382 EOP_STR_IMM(1,7,0x454+i*4); // pmac_read
ede7220f 383 }
d5276282 384 if (dirty_regb & (1 << (25+i))) {
ede7220f 385 if (val != known_regs.pmac_write[i]) {
386 val = known_regs.pmac_write[i];
e122fae6 387 emit_mov_const(A_COND_AL, 1, val);
ede7220f 388 }
e122fae6 389 EOP_STR_IMM(1,7,0x46c+i*4); // pmac_write
ede7220f 390 }
391 }
d5276282 392 dirty_regb &= ~0x3ff80000;
e122fae6 393 hostreg_r[1] = -1;
ede7220f 394}
395
0e4d7ba5 396/* read bank word to r0 (upper bits zero). Thrashes r1. */
5d817c91 397static void tr_bank_read(int addr) /* word addr 0-0x1ff */
398{
bad5731d 399 int breg = 7;
400 if (addr > 0x7f) {
401 if (hostreg_r[1] != (0x100000|((addr&0x180)<<1))) {
402 EOP_ADD_IMM(1,7,30/2,(addr&0x180)>>1); // add r1, r7, ((op&0x180)<<1)
403 hostreg_r[1] = 0x100000|((addr&0x180)<<1);
5d817c91 404 }
bad5731d 405 breg = 1;
5d817c91 406 }
bad5731d 407 EOP_LDRH_IMM(0,breg,(addr&0x7f)<<1); // ldrh r0, [r1, (op&0x7f)<<1]
5d817c91 408 hostreg_r[0] = -1;
409}
410
411/* write r0 to bank. Trashes r1. */
412static void tr_bank_write(int addr)
413{
414 int breg = 7;
415 if (addr > 0x7f) {
d274c33b 416 if (hostreg_r[1] != (0x100000|((addr&0x180)<<1))) {
5d817c91 417 EOP_ADD_IMM(1,7,30/2,(addr&0x180)>>1); // add r1, r7, ((op&0x180)<<1)
d274c33b 418 hostreg_r[1] = 0x100000|((addr&0x180)<<1);
5d817c91 419 }
420 breg = 1;
421 }
b9c1d012 422 EOP_STRH_IMM(0,breg,(addr&0x7f)<<1); // strh r0, [r1, (op&0x7f)<<1]
5d817c91 423}
424
89fea1e9 425/* handle RAM bank pointer modifiers. if need_modulo, trash r1-r3, else nothing */
426static void tr_ptrr_mod(int r, int mod, int need_modulo, int count)
5d817c91 427{
a6fb500b 428 int modulo_shift = -1; /* unknown */
5d817c91 429
430 if (mod == 0) return;
431
432 if (!need_modulo || mod == 1) // +!
433 modulo_shift = 8;
bad5731d 434 else if (need_modulo && (known_regb & KRREG_ST)) {
435 modulo_shift = known_regs.gr[SSP_ST].h & 7;
5d817c91 436 if (modulo_shift == 0) modulo_shift = 8;
437 }
438
89fea1e9 439 if (modulo_shift == -1)
440 {
a6fb500b 441 int reg = (r < 4) ? 8 : 9;
89fea1e9 442 tr_release_pr(r);
0e4d7ba5 443 if (dirty_regb & KRREG_ST) {
444 // avoid flushing ARM flags
445 EOP_AND_IMM(1, 6, 0, 0x70);
446 EOP_SUB_IMM(1, 1, 0, 0x10);
447 EOP_AND_IMM(1, 1, 0, 0x70);
448 EOP_ADD_IMM(1, 1, 0, 0x10);
449 } else {
450 EOP_C_DOP_IMM(A_COND_AL,A_OP_AND,1,6,1,0,0x70); // ands r1, r6, #0x70
451 EOP_C_DOP_IMM(A_COND_EQ,A_OP_MOV,0,0,1,0,0x80); // moveq r1, #0x80
452 }
89fea1e9 453 EOP_MOV_REG_LSR(1, 1, 4); // mov r1, r1, lsr #4
454 EOP_RSB_IMM(2, 1, 0, 8); // rsb r1, r1, #8
455 EOP_MOV_IMM(3, 8/2, count); // mov r3, #0x01000000
456 if (r&3)
457 EOP_ADD_IMM(1, 1, 0, (r&3)*8); // add r1, r1, #(r&3)*8
458 EOP_MOV_REG2_ROR(reg,reg,1); // mov reg, reg, ror r1
459 if (mod == 2)
460 EOP_SUB_REG2_LSL(reg,reg,3,2); // sub reg, reg, #0x01000000 << r2
461 else EOP_ADD_REG2_LSL(reg,reg,3,2);
462 EOP_RSB_IMM(1, 1, 0, 32); // rsb r1, r1, #32
463 EOP_MOV_REG2_ROR(reg,reg,1); // mov reg, reg, ror r1
464 hostreg_r[1] = hostreg_r[2] = hostreg_r[3] = -1;
a6fb500b 465 }
466 else if (known_regb & (1 << (r + 8)))
467 {
468 int modulo = (1 << modulo_shift) - 1;
5d817c91 469 if (mod == 2)
89fea1e9 470 known_regs.r[r] = (known_regs.r[r] & ~modulo) | ((known_regs.r[r] - count) & modulo);
471 else known_regs.r[r] = (known_regs.r[r] & ~modulo) | ((known_regs.r[r] + count) & modulo);
a6fb500b 472 }
473 else
474 {
5d817c91 475 int reg = (r < 4) ? 8 : 9;
476 int ror = ((r&3) + 1)*8 - (8 - modulo_shift);
477 EOP_MOV_REG_ROR(reg,reg,ror);
478 // {add|sub} reg, reg, #1<<shift
89fea1e9 479 EOP_C_DOP_IMM(A_COND_AL,(mod==2)?A_OP_SUB:A_OP_ADD,0,reg,reg, 8/2, count << (8 - modulo_shift));
5d817c91 480 EOP_MOV_REG_ROR(reg,reg,32-ror);
481 }
482}
483
bad5731d 484/* handle writes r0 to (rX). Trashes r1.
485 * fortunately we can ignore modulo increment modes for writes. */
0e4d7ba5 486static void tr_rX_write(int op)
bad5731d 487{
488 if ((op&3) == 3)
489 {
490 int mod = (op>>2) & 3; // direct addressing
491 tr_bank_write((op & 0x100) + mod);
492 }
493 else
494 {
495 int r = (op&3) | ((op>>6)&4);
496 if (known_regb & (1 << (r + 8))) {
497 tr_bank_write((op&0x100) | known_regs.r[r]);
498 } else {
499 int reg = (r < 4) ? 8 : 9;
500 int ror = ((4 - (r&3))*8) & 0x1f;
501 EOP_AND_IMM(1,reg,ror/2,0xff); // and r1, r{7,8}, <mask>
502 if (r >= 4)
503 EOP_ORR_IMM(1,1,((ror-8)&0x1f)/2,1); // orr r1, r1, 1<<shift
504 if (r&3) EOP_ADD_REG_LSR(1,7,1, (r&3)*8-1); // add r1, r7, r1, lsr #lsr
505 else EOP_ADD_REG_LSL(1,7,1,1);
506 EOP_STRH_SIMPLE(0,1); // strh r0, [r1]
507 hostreg_r[1] = -1;
508 }
89fea1e9 509 tr_ptrr_mod(r, (op>>2) & 3, 0, 1);
510 }
511}
512
513/* read (rX) to r0. Trashes r1-r3. */
514static void tr_rX_read(int r, int mod)
515{
516 if ((r&3) == 3)
517 {
518 tr_bank_read(((r << 6) & 0x100) + mod); // direct addressing
519 }
520 else
521 {
522 if (known_regb & (1 << (r + 8))) {
6e39239f 523 tr_bank_read(((r << 6) & 0x100) | known_regs.r[r]);
89fea1e9 524 } else {
525 int reg = (r < 4) ? 8 : 9;
526 int ror = ((4 - (r&3))*8) & 0x1f;
527 EOP_AND_IMM(1,reg,ror/2,0xff); // and r1, r{7,8}, <mask>
528 if (r >= 4)
529 EOP_ORR_IMM(1,1,((ror-8)&0x1f)/2,1); // orr r1, r1, 1<<shift
530 if (r&3) EOP_ADD_REG_LSR(1,7,1, (r&3)*8-1); // add r1, r7, r1, lsr #lsr
531 else EOP_ADD_REG_LSL(1,7,1,1);
532 EOP_LDRH_SIMPLE(0,1); // ldrh r0, [r1]
0e4d7ba5 533 hostreg_r[0] = hostreg_r[1] = -1;
89fea1e9 534 }
535 tr_ptrr_mod(r, mod, 1, 1);
bad5731d 536 }
537}
538
0e4d7ba5 539/* read ((rX)) to r0. Trashes r1,r2. */
540static void tr_rX_read2(int op)
541{
542 int r = (op&3) | ((op>>6)&4); // src
543
544 if ((r&3) == 3) {
545 tr_bank_read((op&0x100) | ((op>>2)&3));
546 } else if (known_regb & (1 << (r+8))) {
547 tr_bank_read((op&0x100) | known_regs.r[r]);
548 } else {
549 int reg = (r < 4) ? 8 : 9;
550 int ror = ((4 - (r&3))*8) & 0x1f;
551 EOP_AND_IMM(1,reg,ror/2,0xff); // and r1, r{7,8}, <mask>
552 if (r >= 4)
553 EOP_ORR_IMM(1,1,((ror-8)&0x1f)/2,1); // orr r1, r1, 1<<shift
554 if (r&3) EOP_ADD_REG_LSR(1,7,1, (r&3)*8-1); // add r1, r7, r1, lsr #lsr
555 else EOP_ADD_REG_LSL(1,7,1,1);
556 EOP_LDRH_SIMPLE(0,1); // ldrh r0, [r1]
557 }
558 EOP_LDR_IMM(2,7,0x48c); // ptr_iram_rom
559 EOP_ADD_REG_LSL(2,2,0,1); // add r2, r2, r0, lsl #1
560 EOP_ADD_IMM(0,0,0,1); // add r0, r0, #1
561 if ((r&3) == 3) {
562 tr_bank_write((op&0x100) | ((op>>2)&3));
563 } else if (known_regb & (1 << (r+8))) {
564 tr_bank_write((op&0x100) | known_regs.r[r]);
565 } else {
566 EOP_STRH_SIMPLE(0,1); // strh r0, [r1]
567 hostreg_r[1] = -1;
568 }
569 EOP_LDRH_SIMPLE(0,2); // ldrh r0, [r2]
570 hostreg_r[0] = hostreg_r[2] = -1;
571}
89fea1e9 572
2385f273 573// check if AL is going to be used later in block
574static int tr_predict_al_need(void)
575{
576 int tmpv, tmpv2, op, pc = known_regs.gr[SSP_PC].h;
577
578 while (1)
579 {
580 op = PROGRAM(pc);
581 switch (op >> 9)
582 {
583 // ld d, s
584 case 0x00:
585 tmpv2 = (op >> 4) & 0xf; // dst
586 tmpv = op & 0xf; // src
587 if ((tmpv2 == SSP_A && tmpv == SSP_P) || tmpv2 == SSP_AL) // ld A, P; ld AL, *
588 return 0;
589 break;
590
591 // ld (ri), s
592 case 0x02:
593 // ld ri, s
594 case 0x0a:
595 // OP a, s
596 case 0x10: case 0x30: case 0x40: case 0x60: case 0x70:
597 tmpv = op & 0xf; // src
598 if (tmpv == SSP_AL) // OP *, AL
599 return 1;
600 break;
601
602 case 0x04:
603 case 0x06:
604 case 0x14:
605 case 0x34:
606 case 0x44:
607 case 0x64:
608 case 0x74: pc++; break;
609
610 // call cond, addr
611 case 0x24:
612 // bra cond, addr
613 case 0x26:
614 // mod cond, op
615 case 0x48:
616 // mpys?
617 case 0x1b:
618 // mpya (rj), (ri), b
619 case 0x4b: return 1;
620
621 // mld (rj), (ri), b
622 case 0x5b: return 0; // cleared anyway
623
624 // and A, *
625 case 0x50:
626 tmpv = op & 0xf; // src
627 if (tmpv == SSP_AL) return 1;
628 case 0x51: case 0x53: case 0x54: case 0x55: case 0x59: case 0x5c:
629 return 0;
630 }
631 pc++;
632 }
633}
634
635
bad5731d 636/* get ARM cond which would mean that SSP cond is satisfied. No trash. */
637static int tr_cond_check(int op)
638{
6e39239f 639 int f = (op & 0x100) >> 8;
bad5731d 640 switch (op&0xf0) {
641 case 0x00: return A_COND_AL; /* always true */
642 case 0x50: /* Z matches f(?) bit */
643 if (dirty_regb & KRREG_ST) return f ? A_COND_EQ : A_COND_NE;
644 EOP_TST_IMM(6, 0, 4);
645 return f ? A_COND_NE : A_COND_EQ;
646 case 0x70: /* N matches f(?) bit */
647 if (dirty_regb & KRREG_ST) return f ? A_COND_MI : A_COND_PL;
648 EOP_TST_IMM(6, 0, 8);
649 return f ? A_COND_NE : A_COND_EQ;
650 default:
2d2247c2 651 elprintf(EL_ANOMALY, "unimplemented cond?\n");
6e39239f 652 tr_unhandled();
bad5731d 653 return 0;
654 }
655}
656
657static int tr_neg_cond(int cond)
658{
659 switch (cond) {
2d2247c2 660 case A_COND_AL: elprintf(EL_ANOMALY, "neg for AL?\n"); exit(1);
bad5731d 661 case A_COND_EQ: return A_COND_NE;
662 case A_COND_NE: return A_COND_EQ;
663 case A_COND_MI: return A_COND_PL;
664 case A_COND_PL: return A_COND_MI;
2d2247c2 665 default: elprintf(EL_ANOMALY, "bad cond for neg\n"); exit(1);
bad5731d 666 }
667 return 0;
668}
669
ede7220f 670static int tr_aop_ssp2arm(int op)
671{
672 switch (op) {
673 case 1: return A_OP_SUB;
674 case 3: return A_OP_CMP;
675 case 4: return A_OP_ADD;
676 case 5: return A_OP_AND;
677 case 6: return A_OP_ORR;
678 case 7: return A_OP_EOR;
679 }
680
681 tr_unhandled();
682 return 0;
683}
684
685// -----------------------------------------------------
686
b9c1d012 687//@ r4: XXYY
688//@ r5: A
689//@ r6: STACK and emu flags
690//@ r7: SSP context
691//@ r10: P
692
bad5731d 693// read general reg to r0. Trashes r1
d5276282 694static void tr_GR0_to_r0(int op)
d274c33b 695{
696 tr_mov16(0, 0xffff);
697}
698
d5276282 699static void tr_X_to_r0(int op)
d274c33b 700{
701 if (hostreg_r[0] != (SSP_X<<16)) {
702 EOP_MOV_REG_LSR(0, 4, 16); // mov r0, r4, lsr #16
703 hostreg_r[0] = SSP_X<<16;
704 }
705}
706
d5276282 707static void tr_Y_to_r0(int op)
d274c33b 708{
d274c33b 709 if (hostreg_r[0] != (SSP_Y<<16)) {
710 EOP_MOV_REG_SIMPLE(0, 4); // mov r0, r4
711 hostreg_r[0] = SSP_Y<<16;
712 }
713}
714
d5276282 715static void tr_A_to_r0(int op)
d274c33b 716{
717 if (hostreg_r[0] != (SSP_A<<16)) {
718 EOP_MOV_REG_LSR(0, 5, 16); // mov r0, r5, lsr #16 @ AH
719 hostreg_r[0] = SSP_A<<16;
720 }
721}
722
d5276282 723static void tr_ST_to_r0(int op)
d274c33b 724{
725 // VR doesn't need much accuracy here..
726 EOP_MOV_REG_LSR(0, 6, 4); // mov r0, r6, lsr #4
727 EOP_AND_IMM(0, 0, 0, 0x67); // and r0, r0, #0x67
728 hostreg_r[0] = -1;
729}
730
d5276282 731static void tr_STACK_to_r0(int op)
d274c33b 732{
733 // 448
734 EOP_SUB_IMM(6, 6, 8/2, 0x20); // sub r6, r6, #1<<29
735 EOP_ADD_IMM(1, 7, 24/2, 0x04); // add r1, r7, 0x400
736 EOP_ADD_IMM(1, 1, 0, 0x48); // add r1, r1, 0x048
737 EOP_ADD_REG_LSR(1, 1, 6, 28); // add r1, r1, r6, lsr #28
738 EOP_LDRH_SIMPLE(0, 1); // ldrh r0, [r1]
739 hostreg_r[0] = hostreg_r[1] = -1;
740}
741
d5276282 742static void tr_PC_to_r0(int op)
d274c33b 743{
bad5731d 744 tr_mov16(0, known_regs.gr[SSP_PC].h);
d274c33b 745}
746
d5276282 747static void tr_P_to_r0(int op)
d274c33b 748{
749 tr_flush_dirty_P();
750 EOP_MOV_REG_LSR(0, 10, 16); // mov r0, r10, lsr #16
751 hostreg_r[0] = -1;
752}
d5276282 753
754static void tr_AL_to_r0(int op)
ede7220f 755{
d5276282 756 if (op == 0x000f) {
757 if (known_regb & KRREG_PMC) {
758 known_regs.emu_status &= ~(SSP_PMC_SET|SSP_PMC_HAVE_ADDR);
759 } else {
760 EOP_LDR_IMM(0,7,0x484); // ldr r1, [r7, #0x484] // emu_status
761 EOP_BIC_IMM(0,0,0,SSP_PMC_SET|SSP_PMC_HAVE_ADDR);
762 EOP_STR_IMM(0,7,0x484);
763 }
764 }
765
766 if (hostreg_r[0] != (SSP_AL<<16)) {
767 EOP_MOV_REG_SIMPLE(0, 5); // mov r0, r5
768 hostreg_r[0] = SSP_AL<<16;
769 }
ede7220f 770}
ede7220f 771
d5276282 772static void tr_PMX_to_r0(int reg)
ede7220f 773{
ede7220f 774 if ((known_regb & KRREG_PMC) && (known_regs.emu_status & SSP_PMC_SET))
775 {
d5276282 776 known_regs.pmac_read[reg] = known_regs.pmc.v;
ede7220f 777 known_regs.emu_status &= ~SSP_PMC_SET;
0336d643 778 known_regb |= 1 << (20+reg);
d5276282 779 dirty_regb |= 1 << (20+reg);
780 return;
ede7220f 781 }
782
d5276282 783 if ((known_regb & KRREG_PMC) && (known_regb & (1 << (20+reg))))
ede7220f 784 {
d5276282 785 u32 pmcv = known_regs.pmac_read[reg];
786 int mode = pmcv>>16;
787 known_regs.emu_status &= ~SSP_PMC_HAVE_ADDR;
788
ede7220f 789 if ((mode & 0xfff0) == 0x0800)
790 {
ede7220f 791 EOP_LDR_IMM(1,7,0x488); // rom_ptr
792 emit_mov_const(A_COND_AL, 0, (pmcv&0xfffff)<<1);
793 EOP_LDRH_REG(0,1,0); // ldrh r0, [r1, r0]
d5276282 794 known_regs.pmac_read[reg] += 1;
ede7220f 795 }
796 else if ((mode & 0x47ff) == 0x0018) // DRAM
797 {
798 int inc = get_inc(mode);
ede7220f 799 EOP_LDR_IMM(1,7,0x490); // dram_ptr
800 emit_mov_const(A_COND_AL, 0, (pmcv&0xffff)<<1);
801 EOP_LDRH_REG(0,1,0); // ldrh r0, [r1, r0]
d5276282 802 if (reg == 4 && (pmcv == 0x187f03 || pmcv == 0x187f04)) // wait loop detection
ede7220f 803 {
804 int flag = (pmcv == 0x187f03) ? SSP_WAIT_30FE06 : SSP_WAIT_30FE08;
805 tr_flush_dirty_ST();
806 EOP_LDR_IMM(1,7,0x484); // ldr r1, [r7, #0x484] // emu_status
807 EOP_TST_REG_SIMPLE(0,0);
71bb1b7b 808 EOP_C_DOP_IMM(A_COND_EQ,A_OP_SUB,0,11,11,22/2,1); // subeq r11, r11, #1024
d5276282 809 EOP_C_DOP_IMM(A_COND_EQ,A_OP_ORR,0, 1, 1,24/2,flag>>8); // orreq r1, r1, #SSP_WAIT_30FE08
ede7220f 810 EOP_STR_IMM(1,7,0x484); // str r1, [r7, #0x484] // emu_status
811 }
d5276282 812 known_regs.pmac_read[reg] += inc;
ede7220f 813 }
814 else
815 {
816 tr_unhandled();
817 }
d5276282 818 known_regs.pmc.v = known_regs.pmac_read[reg];
819 //known_regb |= KRREG_PMC;
820 dirty_regb |= KRREG_PMC;
821 dirty_regb |= 1 << (20+reg);
822 hostreg_r[0] = hostreg_r[1] = -1;
823 return;
824 }
ede7220f 825
d5276282 826 known_regb &= ~KRREG_PMC;
827 dirty_regb &= ~KRREG_PMC;
828 known_regb &= ~(1 << (20+reg));
829 dirty_regb &= ~(1 << (20+reg));
830
831 // call the C code to handle this
832 tr_flush_dirty_ST();
833 //tr_flush_dirty_pmcrs();
834 tr_mov16(0, reg);
45883918 835 emit_call(A_COND_AL, ssp_pm_read);
d5276282 836 hostreg_clear();
837}
838
839static void tr_PM0_to_r0(int op)
840{
841 tr_PMX_to_r0(0);
842}
843
844static void tr_PM1_to_r0(int op)
845{
846 tr_PMX_to_r0(1);
847}
848
849static void tr_PM2_to_r0(int op)
850{
851 tr_PMX_to_r0(2);
852}
853
854static void tr_XST_to_r0(int op)
855{
856 EOP_ADD_IMM(0, 7, 24/2, 4); // add r0, r7, #0x400
857 EOP_LDRH_IMM(0, 0, SSP_XST*4+2);
858}
859
860static void tr_PM4_to_r0(int op)
861{
862 tr_PMX_to_r0(4);
863}
864
865static void tr_PMC_to_r0(int op)
866{
867 if (known_regb & KRREG_PMC)
868 {
869 if (known_regs.emu_status & SSP_PMC_HAVE_ADDR) {
870 known_regs.emu_status |= SSP_PMC_SET;
871 known_regs.emu_status &= ~SSP_PMC_HAVE_ADDR;
872 // do nothing - this is handled elsewhere
873 } else {
874 tr_mov16(0, known_regs.pmc.l);
875 known_regs.emu_status |= SSP_PMC_HAVE_ADDR;
876 }
877 }
878 else
879 {
880 EOP_LDR_IMM(1,7,0x484); // ldr r1, [r7, #0x484] // emu_status
881 tr_flush_dirty_ST();
882 if (op != 0x000e)
883 EOP_LDR_IMM(0, 7, 0x400+SSP_PMC*4);
884 EOP_TST_IMM(1, 0, SSP_PMC_HAVE_ADDR);
885 EOP_C_DOP_IMM(A_COND_EQ,A_OP_ORR,0, 1, 1, 0, SSP_PMC_HAVE_ADDR); // orreq r1, r1, #..
886 EOP_C_DOP_IMM(A_COND_NE,A_OP_BIC,0, 1, 1, 0, SSP_PMC_HAVE_ADDR); // bicne r1, r1, #..
887 EOP_C_DOP_IMM(A_COND_NE,A_OP_ORR,0, 1, 1, 0, SSP_PMC_SET); // orrne r1, r1, #..
888 EOP_STR_IMM(1,7,0x484);
889 hostreg_r[0] = hostreg_r[1] = -1;
ede7220f 890 }
ede7220f 891}
892
d274c33b 893
d5276282 894typedef void (tr_read_func)(int op);
d274c33b 895
d5276282 896static tr_read_func *tr_read_funcs[16] =
d274c33b 897{
898 tr_GR0_to_r0,
899 tr_X_to_r0,
900 tr_Y_to_r0,
901 tr_A_to_r0,
902 tr_ST_to_r0,
903 tr_STACK_to_r0,
904 tr_PC_to_r0,
d5276282 905 tr_P_to_r0,
906 tr_PM0_to_r0,
907 tr_PM1_to_r0,
908 tr_PM2_to_r0,
909 tr_XST_to_r0,
910 tr_PM4_to_r0,
911 (tr_read_func *)tr_unhandled,
912 tr_PMC_to_r0,
913 tr_AL_to_r0
d274c33b 914};
915
916
b9c1d012 917// write r0 to general reg handlers. Trashes r1
6e39239f 918#define TR_WRITE_R0_TO_REG(reg) \
919{ \
920 hostreg_sspreg_changed(reg); \
921 hostreg_r[0] = (reg)<<16; \
922 if (const_val != -1) { \
923 known_regs.gr[reg].h = const_val; \
924 known_regb |= 1 << (reg); \
925 } else { \
926 known_regb &= ~(1 << (reg)); \
927 } \
b9c1d012 928}
929
6e39239f 930static void tr_r0_to_GR0(int const_val)
b9c1d012 931{
932 // do nothing
933}
934
6e39239f 935static void tr_r0_to_X(int const_val)
b9c1d012 936{
937 EOP_MOV_REG_LSL(4, 4, 16); // mov r4, r4, lsl #16
938 EOP_MOV_REG_LSR(4, 4, 16); // mov r4, r4, lsr #16
939 EOP_ORR_REG_LSL(4, 4, 0, 16); // orr r4, r4, r0, lsl #16
6e39239f 940 dirty_regb |= KRREG_P; // touching X or Y makes P dirty.
941 TR_WRITE_R0_TO_REG(SSP_X);
b9c1d012 942}
943
6e39239f 944static void tr_r0_to_Y(int const_val)
b9c1d012 945{
946 EOP_MOV_REG_LSR(4, 4, 16); // mov r4, r4, lsr #16
947 EOP_ORR_REG_LSL(4, 4, 0, 16); // orr r4, r4, r0, lsl #16
948 EOP_MOV_REG_ROR(4, 4, 16); // mov r4, r4, ror #16
bad5731d 949 dirty_regb |= KRREG_P;
6e39239f 950 TR_WRITE_R0_TO_REG(SSP_Y);
b9c1d012 951}
952
6e39239f 953static void tr_r0_to_A(int const_val)
b9c1d012 954{
2385f273 955 if (tr_predict_al_need()) {
956 EOP_MOV_REG_LSL(5, 5, 16); // mov r5, r5, lsl #16
957 EOP_MOV_REG_LSR(5, 5, 16); // mov r5, r5, lsr #16 @ AL
958 EOP_ORR_REG_LSL(5, 5, 0, 16); // orr r5, r5, r0, lsl #16
959 }
960 else
961 EOP_MOV_REG_LSL(5, 0, 16);
6e39239f 962 TR_WRITE_R0_TO_REG(SSP_A);
b9c1d012 963}
964
6e39239f 965static void tr_r0_to_ST(int const_val)
b9c1d012 966{
967 // VR doesn't need much accuracy here..
968 EOP_AND_IMM(1, 0, 0, 0x67); // and r1, r0, #0x67
969 EOP_AND_IMM(6, 6, 8/2, 0xe0); // and r6, r6, #7<<29 @ preserve STACK
970 EOP_ORR_REG_LSL(6, 6, 1, 4); // orr r6, r6, r1, lsl #4
6e39239f 971 TR_WRITE_R0_TO_REG(SSP_ST);
b9c1d012 972 hostreg_r[1] = -1;
6e39239f 973 dirty_regb &= ~KRREG_ST;
b9c1d012 974}
975
6e39239f 976static void tr_r0_to_STACK(int const_val)
b9c1d012 977{
978 // 448
979 EOP_ADD_IMM(1, 7, 24/2, 0x04); // add r1, r7, 0x400
980 EOP_ADD_IMM(1, 1, 0, 0x48); // add r1, r1, 0x048
d274c33b 981 EOP_ADD_REG_LSR(1, 1, 6, 28); // add r1, r1, r6, lsr #28
b9c1d012 982 EOP_STRH_SIMPLE(0, 1); // strh r0, [r1]
d274c33b 983 EOP_ADD_IMM(6, 6, 8/2, 0x20); // add r6, r6, #1<<29
b9c1d012 984 hostreg_r[1] = -1;
985}
986
6e39239f 987static void tr_r0_to_PC(int const_val)
b9c1d012 988{
45883918 989/*
990 * do nothing - dispatcher will take care of this
b9c1d012 991 EOP_MOV_REG_LSL(1, 0, 16); // mov r1, r0, lsl #16
d274c33b 992 EOP_STR_IMM(1,7,0x400+6*4); // str r1, [r7, #(0x400+6*8)]
b9c1d012 993 hostreg_r[1] = -1;
45883918 994*/
b9c1d012 995}
996
d5276282 997static void tr_r0_to_AL(int const_val)
998{
999 EOP_MOV_REG_LSR(5, 5, 16); // mov r5, r5, lsr #16
1000 EOP_ORR_REG_LSL(5, 5, 0, 16); // orr r5, r5, r0, lsl #16
1001 EOP_MOV_REG_ROR(5, 5, 16); // mov r5, r5, ror #16
1002 hostreg_sspreg_changed(SSP_AL);
1003 if (const_val != -1) {
1004 known_regs.gr[SSP_A].l = const_val;
1005 known_regb |= 1 << SSP_AL;
1006 } else
1007 known_regb &= ~(1 << SSP_AL);
1008}
1009
1010static void tr_r0_to_PMX(int reg)
1011{
d5276282 1012 if ((known_regb & KRREG_PMC) && (known_regs.emu_status & SSP_PMC_SET))
1013 {
1014 known_regs.pmac_write[reg] = known_regs.pmc.v;
1015 known_regs.emu_status &= ~SSP_PMC_SET;
1016 known_regb |= 1 << (25+reg);
1017 dirty_regb |= 1 << (25+reg);
1018 return;
1019 }
0b5e8296 1020
d5276282 1021 if ((known_regb & KRREG_PMC) && (known_regb & (1 << (25+reg))))
1022 {
1023 int mode, addr;
1024
1025 known_regs.emu_status &= ~SSP_PMC_HAVE_ADDR;
1026
1027 mode = known_regs.pmac_write[reg]>>16;
1028 addr = known_regs.pmac_write[reg]&0xffff;
1029 if ((mode & 0x43ff) == 0x0018) // DRAM
1030 {
1031 int inc = get_inc(mode);
1032 if (mode & 0x0400) tr_unhandled();
1033 EOP_LDR_IMM(1,7,0x490); // dram_ptr
1034 emit_mov_const(A_COND_AL, 2, addr<<1);
1035 EOP_STRH_REG(0,1,2); // strh r0, [r1, r2]
1036 known_regs.pmac_write[reg] += inc;
1037 }
1038 else if ((mode & 0xfbff) == 0x4018) // DRAM, cell inc
1039 {
1040 if (mode & 0x0400) tr_unhandled();
1041 EOP_LDR_IMM(1,7,0x490); // dram_ptr
1042 emit_mov_const(A_COND_AL, 2, addr<<1);
1043 EOP_STRH_REG(0,1,2); // strh r0, [r1, r2]
1044 known_regs.pmac_write[reg] += (addr&1) ? 31 : 1;
1045 }
1046 else if ((mode & 0x47ff) == 0x001c) // IRAM
1047 {
1048 int inc = get_inc(mode);
1049 EOP_LDR_IMM(1,7,0x48c); // iram_ptr
1050 emit_mov_const(A_COND_AL, 2, (addr&0x3ff)<<1);
1051 EOP_STRH_REG(0,1,2); // strh r0, [r1, r2]
e122fae6 1052 EOP_MOV_IMM(1,0,1);
1053 EOP_STR_IMM(1,7,0x494); // iram_dirty
d5276282 1054 known_regs.pmac_write[reg] += inc;
1055 }
1056 else
1057 tr_unhandled();
1058
1059 known_regs.pmc.v = known_regs.pmac_write[reg];
1060 //known_regb |= KRREG_PMC;
1061 dirty_regb |= KRREG_PMC;
1062 dirty_regb |= 1 << (25+reg);
1063 hostreg_r[1] = hostreg_r[2] = -1;
e122fae6 1064 return;
d5276282 1065 }
1066
1067 known_regb &= ~KRREG_PMC;
1068 dirty_regb &= ~KRREG_PMC;
1069 known_regb &= ~(1 << (25+reg));
1070 dirty_regb &= ~(1 << (25+reg));
d5276282 1071
1072 // call the C code to handle this
1073 tr_flush_dirty_ST();
1074 //tr_flush_dirty_pmcrs();
1075 tr_mov16(1, reg);
45883918 1076 emit_call(A_COND_AL, ssp_pm_write);
d5276282 1077 hostreg_clear();
1078}
1079
1080static void tr_r0_to_PM0(int const_val)
1081{
1082 tr_r0_to_PMX(0);
1083}
1084
1085static void tr_r0_to_PM1(int const_val)
1086{
1087 tr_r0_to_PMX(1);
1088}
1089
1090static void tr_r0_to_PM2(int const_val)
1091{
1092 tr_r0_to_PMX(2);
1093}
1094
1095static void tr_r0_to_PM4(int const_val)
1096{
1097 tr_r0_to_PMX(4);
1098}
1099
1100static void tr_r0_to_PMC(int const_val)
1101{
1102 if ((known_regb & KRREG_PMC) && const_val != -1)
1103 {
1104 if (known_regs.emu_status & SSP_PMC_HAVE_ADDR) {
1105 known_regs.emu_status |= SSP_PMC_SET;
1106 known_regs.emu_status &= ~SSP_PMC_HAVE_ADDR;
1107 known_regs.pmc.h = const_val;
1108 } else {
1109 known_regs.emu_status |= SSP_PMC_HAVE_ADDR;
1110 known_regs.pmc.l = const_val;
1111 }
1112 }
1113 else
1114 {
1115 tr_flush_dirty_ST();
1116 if (known_regb & KRREG_PMC) {
1117 emit_mov_const(A_COND_AL, 1, known_regs.pmc.v);
1118 EOP_STR_IMM(1,7,0x400+SSP_PMC*4);
1119 known_regb &= ~KRREG_PMC;
1120 dirty_regb &= ~KRREG_PMC;
1121 }
1122 EOP_LDR_IMM(1,7,0x484); // ldr r1, [r7, #0x484] // emu_status
1123 EOP_ADD_IMM(2,7,24/2,4); // add r2, r7, #0x400
1124 EOP_TST_IMM(1, 0, SSP_PMC_HAVE_ADDR);
1125 EOP_C_AM3_IMM(A_COND_EQ,1,0,2,0,0,1,SSP_PMC*4); // strxx r0, [r2, #SSP_PMC]
1126 EOP_C_AM3_IMM(A_COND_NE,1,0,2,0,0,1,SSP_PMC*4+2);
1127 EOP_C_DOP_IMM(A_COND_EQ,A_OP_ORR,0, 1, 1, 0, SSP_PMC_HAVE_ADDR); // orreq r1, r1, #..
1128 EOP_C_DOP_IMM(A_COND_NE,A_OP_BIC,0, 1, 1, 0, SSP_PMC_HAVE_ADDR); // bicne r1, r1, #..
1129 EOP_C_DOP_IMM(A_COND_NE,A_OP_ORR,0, 1, 1, 0, SSP_PMC_SET); // orrne r1, r1, #..
1130 EOP_STR_IMM(1,7,0x484);
1131 hostreg_r[1] = hostreg_r[2] = -1;
1132 }
1133}
1134
6e39239f 1135typedef void (tr_write_func)(int const_val);
b9c1d012 1136
d5276282 1137static tr_write_func *tr_write_funcs[16] =
b9c1d012 1138{
1139 tr_r0_to_GR0,
1140 tr_r0_to_X,
1141 tr_r0_to_Y,
1142 tr_r0_to_A,
1143 tr_r0_to_ST,
1144 tr_r0_to_STACK,
1145 tr_r0_to_PC,
d5276282 1146 (tr_write_func *)tr_unhandled,
1147 tr_r0_to_PM0,
1148 tr_r0_to_PM1,
1149 tr_r0_to_PM2,
1150 (tr_write_func *)tr_unhandled,
1151 tr_r0_to_PM4,
1152 (tr_write_func *)tr_unhandled,
1153 tr_r0_to_PMC,
1154 tr_r0_to_AL
b9c1d012 1155};
1156
0e4d7ba5 1157static void tr_mac_load_XY(int op)
1158{
1159 tr_rX_read(op&3, (op>>2)&3); // X
1160 EOP_MOV_REG_LSL(4, 0, 16);
1161 tr_rX_read(((op>>4)&3)|4, (op>>6)&3); // Y
1162 EOP_ORR_REG_SIMPLE(4, 0);
1163 dirty_regb |= KRREG_P;
1164 hostreg_sspreg_changed(SSP_X);
1165 hostreg_sspreg_changed(SSP_Y);
1166 known_regb &= ~KRREG_X;
1167 known_regb &= ~KRREG_Y;
1168}
1169
ede7220f 1170// -----------------------------------------------------
1171
ede7220f 1172static int tr_detect_set_pm(unsigned int op, int *pc, int imm)
0e4d7ba5 1173{
ede7220f 1174 u32 pmcv, tmpv;
1175 if (!((op&0xfef0) == 0x08e0 && (PROGRAM(*pc)&0xfef0) == 0x08e0)) return 0;
1176
1177 // programming PMC:
1178 // ldi PMC, imm1
1179 // ldi PMC, imm2
1180 (*pc)++;
1181 pmcv = imm | (PROGRAM((*pc)++) << 16);
d5276282 1182 known_regs.pmc.v = pmcv;
ede7220f 1183 known_regb |= KRREG_PMC;
d5276282 1184 dirty_regb |= KRREG_PMC;
ede7220f 1185 known_regs.emu_status |= SSP_PMC_SET;
71bb1b7b 1186 n_in_ops++;
ede7220f 1187
1188 // check for possible reg programming
1189 tmpv = PROGRAM(*pc);
1190 if ((tmpv & 0xfff8) == 0x08 || (tmpv & 0xff8f) == 0x80)
1191 {
1192 int is_write = (tmpv & 0xff8f) == 0x80;
1193 int reg = is_write ? ((tmpv>>4)&0x7) : (tmpv&0x7);
1194 if (reg > 4) tr_unhandled();
d5276282 1195 if ((tmpv & 0x0f) != 0 && (tmpv & 0xf0) != 0) tr_unhandled();
ede7220f 1196 known_regs.pmac_read[is_write ? reg + 5 : reg] = pmcv;
1197 known_regb |= is_write ? (1 << (reg+25)) : (1 << (reg+20));
d5276282 1198 dirty_regb |= is_write ? (1 << (reg+25)) : (1 << (reg+20));
ede7220f 1199 known_regs.emu_status &= ~SSP_PMC_SET;
1200 (*pc)++;
71bb1b7b 1201 n_in_ops++;
ede7220f 1202 return 5;
0e4d7ba5 1203 }
1204
d5276282 1205 tr_unhandled();
ede7220f 1206 return 4;
1207}
1208
1209static const short pm0_block_seq[] = { 0x0880, 0, 0x0880, 0, 0x0840, 0x60 };
1210
1211static int tr_detect_pm0_block(unsigned int op, int *pc, int imm)
1212{
1213 // ldi ST, 0
1214 // ldi PM0, 0
1215 // ldi PM0, 0
1216 // ldi ST, 60h
1217 unsigned short *pp;
1218 if (op != 0x0840 || imm != 0) return 0;
1219 pp = PROGRAM_P(*pc);
1220 if (memcmp(pp, pm0_block_seq, sizeof(pm0_block_seq)) != 0) return 0;
1221
1222 EOP_AND_IMM(6, 6, 8/2, 0xe0); // and r6, r6, #7<<29 @ preserve STACK
1223 EOP_ORR_IMM(6, 6, 24/2, 6); // orr r6, r6, 0x600
1224 hostreg_sspreg_changed(SSP_ST);
1225 known_regs.gr[SSP_ST].h = 0x60;
1226 known_regb |= 1 << SSP_ST;
1227 dirty_regb &= ~KRREG_ST;
1228 (*pc) += 3*2;
71bb1b7b 1229 n_in_ops += 3;
ede7220f 1230 return 4*2;
0e4d7ba5 1231}
5d817c91 1232
d5276282 1233static int tr_detect_rotate(unsigned int op, int *pc, int imm)
1234{
1235 // @ 3DA2 and 426A
1236 // ld PMC, (r3|00)
1237 // ld (r3|00), PMC
1238 // ld -, AL
1239 if (op != 0x02e3 || PROGRAM(*pc) != 0x04e3 || PROGRAM(*pc + 1) != 0x000f) return 0;
1240
1241 tr_bank_read(0);
1242 EOP_MOV_REG_LSL(0, 0, 4);
1243 EOP_ORR_REG_LSR(0, 0, 0, 16);
1244 tr_bank_write(0);
1245 (*pc) += 2;
71bb1b7b 1246 n_in_ops += 2;
d5276282 1247 return 3;
1248}
1249
ede7220f 1250// -----------------------------------------------------
1251
45883918 1252static int translate_op(unsigned int op, int *pc, int imm, int *end_cond, int *jump_pc)
5d817c91 1253{
0e4d7ba5 1254 u32 tmpv, tmpv2, tmpv3;
5d817c91 1255 int ret = 0;
bad5731d 1256 known_regs.gr[SSP_PC].h = *pc;
5d817c91 1257
e807ac75 1258 switch (op >> 9)
1259 {
1260 // ld d, s
f48f5e3b 1261 case 0x00:
5d817c91 1262 if (op == 0) { ret++; break; } // nop
d274c33b 1263 tmpv = op & 0xf; // src
1264 tmpv2 = (op >> 4) & 0xf; // dst
d274c33b 1265 if (tmpv2 == SSP_A && tmpv == SSP_P) { // ld A, P
1266 tr_flush_dirty_P();
1267 EOP_MOV_REG_SIMPLE(5, 10);
d5276282 1268 hostreg_sspreg_changed(SSP_A);
bad5731d 1269 known_regb &= ~(KRREG_A|KRREG_AL);
d274c33b 1270 ret++; break;
1271 }
d5276282 1272 tr_read_funcs[tmpv](op);
6e39239f 1273 tr_write_funcs[tmpv2]((known_regb & (1 << tmpv)) ? known_regs.gr[tmpv].h : -1);
45883918 1274 if (tmpv2 == SSP_PC) {
1275 ret |= 0x10000;
1276 *end_cond = -A_COND_AL;
1277 }
bad5731d 1278 ret++; break;
1279
1280 // ld d, (ri)
89fea1e9 1281 case 0x01: {
89fea1e9 1282 int r = (op&3) | ((op>>6)&4);
1283 int mod = (op>>2)&3;
1284 tmpv = (op >> 4) & 0xf; // dst
d5276282 1285 ret = tr_detect_rotate(op, pc, imm);
1286 if (ret > 0) break;
89fea1e9 1287 if (tmpv != 0)
2385f273 1288 tr_rX_read(r, mod);
1289 else {
1290 int cnt = 1;
1291 while (PROGRAM(*pc) == op) {
1292 (*pc)++; cnt++; ret++;
1293 n_in_ops++;
1294 }
1295 tr_ptrr_mod(r, mod, 1, cnt); // skip
1296 }
6e39239f 1297 tr_write_funcs[tmpv](-1);
45883918 1298 if (tmpv == SSP_PC) {
1299 ret |= 0x10000;
1300 *end_cond = -A_COND_AL;
1301 }
89fea1e9 1302 ret++; break;
1303 }
bad5731d 1304
1305 // ld (ri), s
1306 case 0x02:
1307 tmpv = (op >> 4) & 0xf; // src
d5276282 1308 tr_read_funcs[tmpv](op);
0e4d7ba5 1309 tr_rX_write(op);
d274c33b 1310 ret++; break;
f48f5e3b 1311
1312 // ld a, adr
1313 case 0x03:
5d817c91 1314 tr_bank_read(op&0x1ff);
6e39239f 1315 tr_r0_to_A(-1);
5d817c91 1316 ret++; break;
1317
b9c1d012 1318 // ldi d, imm
1319 case 0x04:
ede7220f 1320 tmpv = (op & 0xf0) >> 4; // dst
1321 ret = tr_detect_pm0_block(op, pc, imm);
1322 if (ret > 0) break;
ede7220f 1323 ret = tr_detect_set_pm(op, pc, imm);
1324 if (ret > 0) break;
0b5e8296 1325 tr_mov16(0, imm);
1326 tr_write_funcs[tmpv](imm);
45883918 1327 if (tmpv == SSP_PC) {
1328 ret |= 0x10000;
1329 *jump_pc = imm;
1330 }
0b5e8296 1331 ret += 2; break;
b9c1d012 1332
bad5731d 1333 // ld d, ((ri))
0e4d7ba5 1334 case 0x05:
bad5731d 1335 tmpv2 = (op >> 4) & 0xf; // dst
0e4d7ba5 1336 tr_rX_read2(op);
6e39239f 1337 tr_write_funcs[tmpv2](-1);
45883918 1338 if (tmpv2 == SSP_PC) {
1339 ret |= 0x10000;
1340 *end_cond = -A_COND_AL;
1341 }
0e4d7ba5 1342 ret += 3; break;
b9c1d012 1343
5d817c91 1344 // ldi (ri), imm
1345 case 0x06:
5d817c91 1346 tr_mov16(0, imm);
0e4d7ba5 1347 tr_rX_write(op);
a6fb500b 1348 ret += 2; break;
f48f5e3b 1349
1350 // ld adr, a
1351 case 0x07:
d5276282 1352 tr_A_to_r0(op);
5d817c91 1353 tr_bank_write(op&0x1ff);
1354 ret++; break;
1355
d274c33b 1356 // ld d, ri
1357 case 0x09: {
bad5731d 1358 int r;
d274c33b 1359 r = (op&3) | ((op>>6)&4); // src
bad5731d 1360 tmpv2 = (op >> 4) & 0xf; // dst
bad5731d 1361 if ((r&3) == 3) tr_unhandled();
d274c33b 1362
bad5731d 1363 if (known_regb & (1 << (r+8))) {
1364 tr_mov16(0, known_regs.r[r]);
6e39239f 1365 tr_write_funcs[tmpv2](known_regs.r[r]);
d274c33b 1366 } else {
bad5731d 1367 int reg = (r < 4) ? 8 : 9;
d274c33b 1368 if (r&3) EOP_MOV_REG_LSR(0, reg, (r&3)*8); // mov r0, r{7,8}, lsr #lsr
1369 EOP_AND_IMM(0, (r&3)?0:reg, 0, 0xff); // and r0, r{7,8}, <mask>
1370 hostreg_r[0] = -1;
6e39239f 1371 tr_write_funcs[tmpv2](-1);
d274c33b 1372 }
d274c33b 1373 ret++; break;
1374 }
1375
bad5731d 1376 // ld ri, s
1377 case 0x0a: {
1378 int r;
1379 r = (op&3) | ((op>>6)&4); // dst
1380 tmpv = (op >> 4) & 0xf; // src
bad5731d 1381 if ((r&3) == 3) tr_unhandled();
1382
1383 if (known_regb & (1 << tmpv)) {
1384 known_regs.r[r] = known_regs.gr[tmpv].h;
1385 known_regb |= 1 << (r + 8);
1386 dirty_regb |= 1 << (r + 8);
1387 } else {
1388 int reg = (r < 4) ? 8 : 9;
1389 int ror = ((4 - (r&3))*8) & 0x1f;
d5276282 1390 tr_read_funcs[tmpv](op);
bad5731d 1391 EOP_BIC_IMM(reg, reg, ror/2, 0xff); // bic r{7,8}, r{7,8}, <mask>
1392 EOP_AND_IMM(0, 0, 0, 0xff); // and r0, r0, 0xff
1393 EOP_ORR_REG_LSL(reg, reg, 0, (r&3)*8); // orr r{7,8}, r{7,8}, r0, lsl #lsl
1394 hostreg_r[0] = -1;
1395 known_regb &= ~(1 << (r+8));
1396 dirty_regb &= ~(1 << (r+8));
1397 }
1398 ret++; break;
1399 }
1400
5d817c91 1401 // ldi ri, simm
67c81ee2 1402 case 0x0c: case 0x0d: case 0x0e: case 0x0f:
5d817c91 1403 tmpv = (op>>8)&7;
bad5731d 1404 known_regs.r[tmpv] = op;
1405 known_regb |= 1 << (tmpv + 8);
5d817c91 1406 dirty_regb |= 1 << (tmpv + 8);
1407 ret++; break;
bad5731d 1408
a6fb500b 1409 // call cond, addr
6e39239f 1410 case 0x24: {
1411 u32 *jump_op = NULL;
a6fb500b 1412 tmpv = tr_cond_check(op);
6e39239f 1413 if (tmpv != A_COND_AL) {
1414 jump_op = tcache_ptr;
1415 EOP_MOV_IMM(0, 0, 0); // placeholder for branch
1416 }
1417 tr_mov16(0, *pc);
1418 tr_r0_to_STACK(*pc);
1419 if (tmpv != A_COND_AL) {
1420 u32 *real_ptr = tcache_ptr;
1421 tcache_ptr = jump_op;
1422 EOP_C_B(tr_neg_cond(tmpv),0,real_ptr - jump_op - 2);
1423 tcache_ptr = real_ptr;
1424 }
a6fb500b 1425 tr_mov16_cond(tmpv, 0, imm);
45883918 1426 if (tmpv != A_COND_AL)
a6fb500b 1427 tr_mov16_cond(tr_neg_cond(tmpv), 0, *pc);
6e39239f 1428 tr_r0_to_PC(tmpv == A_COND_AL ? imm : -1);
ede7220f 1429 ret |= 0x10000;
45883918 1430 *end_cond = tmpv;
1431 *jump_pc = imm;
a6fb500b 1432 ret += 2; break;
6e39239f 1433 }
a6fb500b 1434
bad5731d 1435 // ld d, (a)
1436 case 0x25:
bad5731d 1437 tmpv2 = (op >> 4) & 0xf; // dst
d5276282 1438 tr_A_to_r0(op);
bad5731d 1439 EOP_LDR_IMM(1,7,0x48c); // ptr_iram_rom
1440 EOP_ADD_REG_LSL(0,1,0,1); // add r0, r1, r0, lsl #1
1441 EOP_LDRH_SIMPLE(0,0); // ldrh r0, [r0]
1442 hostreg_r[0] = hostreg_r[1] = -1;
6e39239f 1443 tr_write_funcs[tmpv2](-1);
45883918 1444 if (tmpv2 == SSP_PC) {
1445 ret |= 0x10000;
1446 *end_cond = -A_COND_AL;
1447 }
a6fb500b 1448 ret += 3; break;
bad5731d 1449
1450 // bra cond, addr
a6fb500b 1451 case 0x26:
bad5731d 1452 tmpv = tr_cond_check(op);
1453 tr_mov16_cond(tmpv, 0, imm);
45883918 1454 if (tmpv != A_COND_AL)
bad5731d 1455 tr_mov16_cond(tr_neg_cond(tmpv), 0, *pc);
6e39239f 1456 tr_r0_to_PC(tmpv == A_COND_AL ? imm : -1);
ede7220f 1457 ret |= 0x10000;
45883918 1458 *end_cond = tmpv;
1459 *jump_pc = imm;
a6fb500b 1460 ret += 2; break;
bad5731d 1461
89fea1e9 1462 // mod cond, op
89fea1e9 1463 case 0x48: {
1464 // check for repeats of this op
1465 tmpv = 1; // count
1466 while (PROGRAM(*pc) == op && (op & 7) != 6) {
1467 (*pc)++; tmpv++;
71bb1b7b 1468 n_in_ops++;
89fea1e9 1469 }
6e39239f 1470 if ((op&0xf0) != 0) // !always
1471 tr_make_dirty_ST();
1472
89fea1e9 1473 tmpv2 = tr_cond_check(op);
1474 switch (op & 7) {
1475 case 2: EOP_C_DOP_REG_XIMM(tmpv2,A_OP_MOV,1,0,5,tmpv,A_AM1_ASR,5); break; // shr (arithmetic)
1476 case 3: EOP_C_DOP_REG_XIMM(tmpv2,A_OP_MOV,1,0,5,tmpv,A_AM1_LSL,5); break; // shl
1477 case 6: EOP_C_DOP_IMM(tmpv2,A_OP_RSB,1,5,5,0,0); break; // neg
6e39239f 1478 case 7: EOP_C_DOP_REG_XIMM(tmpv2,A_OP_EOR,0,5,1,31,A_AM1_ASR,5); // eor r1, r5, r5, asr #31
1479 EOP_C_DOP_REG_XIMM(tmpv2,A_OP_ADD,1,1,5,31,A_AM1_LSR,5); // adds r5, r1, r5, lsr #31
89fea1e9 1480 hostreg_r[1] = -1; break; // abs
1481 default: tr_unhandled();
1482 }
6e39239f 1483
1484 hostreg_sspreg_changed(SSP_A);
1485 dirty_regb |= KRREG_ST;
1486 known_regb &= ~KRREG_ST;
1487 known_regb &= ~(KRREG_A|KRREG_AL);
89fea1e9 1488 ret += tmpv; break;
1489 }
0e4d7ba5 1490
bad5731d 1491 // mpys?
1492 case 0x1b:
0e4d7ba5 1493 tr_flush_dirty_P();
1494 tr_mac_load_XY(op);
1495 tr_make_dirty_ST();
1496 EOP_C_DOP_REG_XIMM(A_COND_AL,A_OP_SUB,1,5,5,0,A_AM1_LSL,10); // subs r5, r5, r10
1497 hostreg_sspreg_changed(SSP_A);
1498 known_regb &= ~(KRREG_A|KRREG_AL);
1499 dirty_regb |= KRREG_ST;
1500 ret++; break;
bad5731d 1501
1502 // mpya (rj), (ri), b
1503 case 0x4b:
0e4d7ba5 1504 tr_flush_dirty_P();
1505 tr_mac_load_XY(op);
1506 tr_make_dirty_ST();
1507 EOP_C_DOP_REG_XIMM(A_COND_AL,A_OP_ADD,1,5,5,0,A_AM1_LSL,10); // adds r5, r5, r10
1508 hostreg_sspreg_changed(SSP_A);
1509 known_regb &= ~(KRREG_A|KRREG_AL);
1510 dirty_regb |= KRREG_ST;
1511 ret++; break;
bad5731d 1512
1513 // mld (rj), (ri), b
1514 case 0x5b:
0e4d7ba5 1515 EOP_C_DOP_IMM(A_COND_AL,A_OP_MOV,1,0,5,0,0); // movs r5, #0
1516 hostreg_sspreg_changed(SSP_A);
1517 known_regs.gr[SSP_A].v = 0;
bad5731d 1518 known_regb |= (KRREG_A|KRREG_AL);
0e4d7ba5 1519 dirty_regb |= KRREG_ST;
1520 tr_mac_load_XY(op);
1521 ret++; break;
1522
1523 // OP a, s
1524 case 0x10:
1525 case 0x30:
1526 case 0x40:
1527 case 0x50:
1528 case 0x60:
1529 case 0x70:
1530 tmpv = op & 0xf; // src
1531 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1532 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
0e4d7ba5 1533 if (tmpv == SSP_P) {
1534 tr_flush_dirty_P();
1535 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3, 0,A_AM1_LSL,10); // OPs r5, r5, r10
1536 } else if (tmpv == SSP_A) {
1537 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3, 0,A_AM1_LSL, 5); // OPs r5, r5, r5
1538 } else {
d5276282 1539 tr_read_funcs[tmpv](op);
0e4d7ba5 1540 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL, 0); // OPs r5, r5, r0, lsl #16
1541 }
1542 hostreg_sspreg_changed(SSP_A);
1543 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1544 dirty_regb |= KRREG_ST;
1545 ret++; break;
1546
1547 // OP a, (ri)
1548 case 0x11:
1549 case 0x31:
1550 case 0x41:
1551 case 0x51:
1552 case 0x61:
1553 case 0x71:
1554 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1555 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1556 tr_rX_read((op&3)|((op>>6)&4), (op>>2)&3);
1557 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL,0); // OPs r5, r5, r0, lsl #16
1558 hostreg_sspreg_changed(SSP_A);
1559 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1560 dirty_regb |= KRREG_ST;
1561 ret++; break;
1562
1563 // OP a, adr
1564 case 0x13:
1565 case 0x33:
1566 case 0x43:
1567 case 0x53:
1568 case 0x63:
1569 case 0x73:
1570 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1571 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1572 tr_bank_read(op&0x1ff);
1573 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL,0); // OPs r5, r5, r0, lsl #16
1574 hostreg_sspreg_changed(SSP_A);
1575 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1576 dirty_regb |= KRREG_ST;
1577 ret++; break;
1578
1579 // OP a, imm
1580 case 0x14:
1581 case 0x34:
1582 case 0x44:
1583 case 0x54:
1584 case 0x64:
1585 case 0x74:
1586 tmpv = (op & 0xf0) >> 4;
1587 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1588 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1589 tr_mov16(0, imm);
1590 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL,0); // OPs r5, r5, r0, lsl #16
1591 hostreg_sspreg_changed(SSP_A);
1592 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1593 dirty_regb |= KRREG_ST;
1594 ret += 2; break;
1595
1596 // OP a, ((ri))
1597 case 0x15:
1598 case 0x35:
1599 case 0x45:
1600 case 0x55:
1601 case 0x65:
1602 case 0x75:
1603 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1604 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1605 tr_rX_read2(op);
1606 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL,0); // OPs r5, r5, r0, lsl #16
1607 hostreg_sspreg_changed(SSP_A);
1608 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1609 dirty_regb |= KRREG_ST;
1610 ret += 3; break;
1611
1612 // OP a, ri
1613 case 0x19:
1614 case 0x39:
1615 case 0x49:
1616 case 0x59:
1617 case 0x69:
1618 case 0x79: {
1619 int r;
1620 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1621 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1622 r = (op&3) | ((op>>6)&4); // src
1623 if ((r&3) == 3) tr_unhandled();
1624
1625 if (known_regb & (1 << (r+8))) {
1626 EOP_C_DOP_IMM(A_COND_AL,tmpv2,1,5,tmpv3,16/2,known_regs.r[r]); // OPs r5, r5, #val<<16
1627 } else {
1628 int reg = (r < 4) ? 8 : 9;
1629 if (r&3) EOP_MOV_REG_LSR(0, reg, (r&3)*8); // mov r0, r{7,8}, lsr #lsr
1630 EOP_AND_IMM(0, (r&3)?0:reg, 0, 0xff); // and r0, r{7,8}, <mask>
1631 EOP_C_DOP_REG_XIMM(A_COND_AL,tmpv2,1,5,tmpv3,16,A_AM1_LSL,0); // OPs r5, r5, r0, lsl #16
1632 hostreg_r[0] = -1;
1633 }
1634 hostreg_sspreg_changed(SSP_A);
1635 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1636 dirty_regb |= KRREG_ST;
1637 ret++; break;
1638 }
1639
1640 // OP simm
1641 case 0x1c:
1642 case 0x3c:
1643 case 0x4c:
1644 case 0x5c:
1645 case 0x6c:
1646 case 0x7c:
1647 tmpv2 = tr_aop_ssp2arm(op>>13); // op
1648 tmpv3 = (tmpv2 == A_OP_CMP) ? 0 : 5;
1649 EOP_C_DOP_IMM(A_COND_AL,tmpv2,1,5,tmpv3,16/2,op & 0xff); // OPs r5, r5, #val<<16
1650 hostreg_sspreg_changed(SSP_A);
1651 known_regb &= ~(KRREG_A|KRREG_AL|KRREG_ST);
1652 dirty_regb |= KRREG_ST;
bad5731d 1653 ret++; break;
e807ac75 1654 }
1655
71bb1b7b 1656 n_in_ops++;
1657
5d817c91 1658 return ret;
e807ac75 1659}
1660
45883918 1661static void emit_block_prologue(void)
1662{
1663 // check if there are enough cycles..
1664 // note: r0 must contain PC of current block
1665 EOP_CMP_IMM(11,0,0); // cmp r11, #0
f8af9634 1666 emit_jump(A_COND_LE, ssp_drc_end);
45883918 1667}
1668
1669/* cond:
1670 * >0: direct (un)conditional jump
1671 * <0: indirect jump
1672 */
1673static void emit_block_epilogue(int cycles, int cond, int pc, int end_pc)
1674{
2d2247c2 1675 if (cycles > 0xff) { elprintf(EL_ANOMALY, "large cycle count: %i\n", cycles); cycles = 0xff; }
45883918 1676 EOP_SUB_IMM(11,11,0,cycles); // sub r11, r11, #cycles
1677
1678 if (cond < 0 || (end_pc >= 0x400 && pc < 0x400)) {
1679 // indirect jump, or rom -> iram jump, must use dispatcher
1680 emit_jump(A_COND_AL, ssp_drc_next);
1681 }
1682 else if (cond == A_COND_AL) {
1ca2ea4f 1683 u32 *target = (pc < 0x400) ? ssp_block_table_iram[ssp->drc.iram_context][pc] : ssp_block_table[pc];
45883918 1684 if (target != NULL)
1685 emit_jump(A_COND_AL, target);
1686 else {
f8af9634 1687 int ops = emit_jump(A_COND_AL, ssp_drc_next);
1688 // cause the next block to be emitted over jump instruction
1689 tcache_ptr -= ops;
45883918 1690 }
1691 }
1692 else {
f8af9634 1693 u32 *target1 = (pc < 0x400) ? ssp_block_table_iram[ssp->drc.iram_context][pc] : ssp_block_table[pc];
1ca2ea4f 1694 u32 *target2 = (end_pc < 0x400) ? ssp_block_table_iram[ssp->drc.iram_context][end_pc] : ssp_block_table[end_pc];
45883918 1695 if (target1 != NULL)
1696 emit_jump(cond, target1);
45883918 1697 if (target2 != NULL)
1698 emit_jump(tr_neg_cond(cond), target2); // neg_cond, to be able to swap jumps if needed
f8af9634 1699#ifndef __EPOC32__
1700 // emit patchable branches
1701 if (target1 == NULL)
1702 emit_call(cond, ssp_drc_next_patch);
1703 if (target2 == NULL)
1704 emit_call(tr_neg_cond(cond), ssp_drc_next_patch);
1705#else
1706 // won't patch indirect jumps
1707 if (target1 == NULL || target2 == NULL)
1708 emit_jump(A_COND_AL, ssp_drc_next);
1709#endif
45883918 1710 }
1711}
1712
71bb1b7b 1713void *ssp_translate_block(int pc)
726bbb3e 1714{
e807ac75 1715 unsigned int op, op1, imm, ccount = 0;
5c129565 1716 unsigned int *block_start;
45883918 1717 int ret, end_cond = A_COND_AL, jump_pc = -1;
5c129565 1718
2d2247c2 1719 //printf("translate %04x -> %04x\n", pc<<1, (tcache_ptr-tcache)<<2);
f8af9634 1720
5c129565 1721 block_start = tcache_ptr;
bad5731d 1722 known_regb = 0;
1723 dirty_regb = KRREG_P;
d5276282 1724 known_regs.emu_status = 0;
5d817c91 1725 hostreg_clear();
5c129565 1726
1727 emit_block_prologue();
726bbb3e 1728
e807ac75 1729 for (; ccount < 100;)
726bbb3e 1730 {
1731 op = PROGRAM(pc++);
1732 op1 = op >> 9;
e807ac75 1733 imm = (u32)-1;
5c129565 1734
e807ac75 1735 if ((op1 & 0xf) == 4 || (op1 & 0xf) == 6)
1736 imm = PROGRAM(pc++); // immediate
5c129565 1737
45883918 1738 ret = translate_op(op, &pc, imm, &end_cond, &jump_pc);
e807ac75 1739 if (ret <= 0)
1740 {
2d2247c2 1741 elprintf(EL_ANOMALY, "NULL func! op=%08x (%02x)\n", op, op1);
1742 //exit(1);
892b1dd2 1743 }
ede7220f 1744
45883918 1745 ccount += ret & 0xffff;
1746 if (ret & 0x10000) break;
726bbb3e 1747 }
5c129565 1748
45883918 1749 if (ccount >= 100) {
1750 end_cond = A_COND_AL;
1751 jump_pc = pc;
1752 emit_mov_const(A_COND_AL, 0, pc);
1753 }
0b5e8296 1754
89fea1e9 1755 tr_flush_dirty_prs();
1756 tr_flush_dirty_ST();
ede7220f 1757 tr_flush_dirty_pmcrs();
45883918 1758 emit_block_epilogue(ccount, end_cond, jump_pc, pc);
726bbb3e 1759
1ca2ea4f 1760 if (tcache_ptr - tcache > SSP_TCACHE_SIZE/4) {
f8af9634 1761 elprintf(EL_ANOMALY|EL_STATUS|EL_SVP, "tcache overflow!\n");
726bbb3e 1762 fflush(stdout);
1763 exit(1);
1764 }
1765
1766 // stats
1767 nblocks++;
2d2247c2 1768 //printf("%i blocks, %i bytes, k=%.3f\n", nblocks, (tcache_ptr - tcache)*4,
1769 // (double)(tcache_ptr - tcache) / (double)n_in_ops);
df143b36 1770
5d817c91 1771#ifdef DUMP_BLOCK
5c129565 1772 {
1773 FILE *f = fopen("tcache.bin", "wb");
1774 fwrite(tcache, 1, (tcache_ptr - tcache)*4, f);
1775 fclose(f);
1776 }
43e6eaad 1777 printf("dumped tcache.bin\n");
5c129565 1778 exit(0);
1779#endif
259ed0ea 1780
1781 handle_caches();
1782
5c129565 1783 return block_start;
726bbb3e 1784}
1785
1786
1787
1788// -----------------------------------------------------
1789
fad24893 1790static void ssp1601_state_load(void)
1791{
1792 ssp->drc.iram_dirty = 1;
1793 ssp->drc.iram_context = 0;
1794}
1795
e807ac75 1796int ssp1601_dyn_startup(void)
726bbb3e 1797{
1ca2ea4f 1798 memset(tcache, 0, SSP_TCACHE_SIZE);
1799 memset(ssp_block_table, 0, sizeof(ssp_block_table));
1800 memset(ssp_block_table_iram, 0, sizeof(ssp_block_table_iram));
e807ac75 1801 tcache_ptr = tcache;
726bbb3e 1802
fad24893 1803 PicoLoadStateHook = ssp1601_state_load;
1804
f5d1115f 1805 n_in_ops = 0;
d5276282 1806#ifdef ARM
1807 // hle'd blocks
1ca2ea4f 1808 ssp_block_table[0x800/2] = (void *) ssp_hle_800;
1809 ssp_block_table[0x902/2] = (void *) ssp_hle_902;
1810 ssp_block_table_iram[ 7][0x030/2] = (void *) ssp_hle_07_030;
1811 ssp_block_table_iram[ 7][0x036/2] = (void *) ssp_hle_07_036;
1812 ssp_block_table_iram[ 7][0x6d6/2] = (void *) ssp_hle_07_6d6;
1813 ssp_block_table_iram[11][0x12c/2] = (void *) ssp_hle_11_12c;
1814 ssp_block_table_iram[11][0x384/2] = (void *) ssp_hle_11_384;
1815 ssp_block_table_iram[11][0x38a/2] = (void *) ssp_hle_11_38a;
d5276282 1816#endif
1817
726bbb3e 1818 return 0;
1819}
1820
1821
1822void ssp1601_dyn_reset(ssp1601_t *ssp)
1823{
71bb1b7b 1824 ssp1601_reset(ssp);
1825 ssp->drc.iram_dirty = 1;
1826 ssp->drc.iram_context = 0;
1827 // must do this here because ssp is not available @ startup()
1828 ssp->drc.ptr_rom = (u32) Pico.rom;
1829 ssp->drc.ptr_iram_rom = (u32) svp->iram_rom;
1830 ssp->drc.ptr_dram = (u32) svp->dram;
1ca2ea4f 1831 ssp->drc.ptr_btable = (u32) ssp_block_table;
1832 ssp->drc.ptr_btable_iram = (u32) ssp_block_table_iram;
45883918 1833
1834 // prevent new versions of IRAM from appearing
1835 memset(svp->iram_rom, 0, 0x800);
726bbb3e 1836}
1837
f8af9634 1838
726bbb3e 1839void ssp1601_dyn_run(int cycles)
1840{
b9c1d012 1841 if (ssp->emu_status & SSP_WAIT_MASK) return;
b9c1d012 1842
fad24893 1843#ifdef DUMP_BLOCK
1844 ssp_translate_block(DUMP_BLOCK >> 1);
1845#endif
1846#ifdef ARM
71bb1b7b 1847 ssp_drc_entry(cycles);
fad24893 1848#endif
726bbb3e 1849}
1850
fast MegaDrive/MegaCD/32X emulator