rx.c revision 1.1.1.1.8.1
1 /* rx.c --- opcode semantics for stand-alone RX simulator. 2 3 Copyright (C) 2008-2014 Free Software Foundation, Inc. 4 Contributed by Red Hat, Inc. 5 6 This file is part of the GNU simulators. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "config.h" 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <signal.h> 26 27 #include "opcode/rx.h" 28 #include "cpu.h" 29 #include "mem.h" 30 #include "syscalls.h" 31 #include "fpu.h" 32 #include "err.h" 33 #include "misc.h" 34 35 #ifdef CYCLE_STATS 36 static const char * id_names[] = { 37 "RXO_unknown", 38 "RXO_mov", /* d = s (signed) */ 39 "RXO_movbi", /* d = [s,s2] (signed) */ 40 "RXO_movbir", /* [s,s2] = d (signed) */ 41 "RXO_pushm", /* s..s2 */ 42 "RXO_popm", /* s..s2 */ 43 "RXO_xchg", /* s <-> d */ 44 "RXO_stcc", /* d = s if cond(s2) */ 45 "RXO_rtsd", /* rtsd, 1=imm, 2-0 = reg if reg type */ 46 47 /* These are all either d OP= s or, if s2 is set, d = s OP s2. Note 48 that d may be "None". */ 49 "RXO_and", 50 "RXO_or", 51 "RXO_xor", 52 "RXO_add", 53 "RXO_sub", 54 "RXO_mul", 55 "RXO_div", 56 "RXO_divu", 57 "RXO_shll", 58 "RXO_shar", 59 "RXO_shlr", 60 61 "RXO_adc", /* d = d + s + carry */ 62 "RXO_sbb", /* d = d - s - ~carry */ 63 "RXO_abs", /* d = |s| */ 64 "RXO_max", /* d = max(d,s) */ 65 "RXO_min", /* d = min(d,s) */ 66 "RXO_emul", /* d:64 = d:32 * s */ 67 "RXO_emulu", /* d:64 = d:32 * s (unsigned) */ 68 69 "RXO_rolc", /* d <<= 1 through carry */ 70 "RXO_rorc", /* d >>= 1 through carry*/ 71 "RXO_rotl", /* d <<= #s without carry */ 72 "RXO_rotr", /* d >>= #s without carry*/ 73 "RXO_revw", /* d = revw(s) */ 74 "RXO_revl", /* d = revl(s) */ 75 "RXO_branch", /* pc = d if cond(s) */ 76 "RXO_branchrel",/* pc += d if cond(s) */ 77 "RXO_jsr", /* pc = d */ 78 "RXO_jsrrel", /* pc += d */ 79 "RXO_rts", 80 "RXO_nop", 81 "RXO_nop2", 82 "RXO_nop3", 83 84 "RXO_scmpu", 85 "RXO_smovu", 86 "RXO_smovb", 87 "RXO_suntil", 88 "RXO_swhile", 89 "RXO_smovf", 90 "RXO_sstr", 91 92 "RXO_rmpa", 93 "RXO_mulhi", 94 "RXO_mullo", 95 "RXO_machi", 96 "RXO_maclo", 97 "RXO_mvtachi", 98 "RXO_mvtaclo", 99 "RXO_mvfachi", 100 "RXO_mvfacmi", 101 "RXO_mvfaclo", 102 "RXO_racw", 103 104 "RXO_sat", /* sat(d) */ 105 "RXO_satr", 106 107 "RXO_fadd", /* d op= s */ 108 "RXO_fcmp", 109 "RXO_fsub", 110 "RXO_ftoi", 111 "RXO_fmul", 112 "RXO_fdiv", 113 "RXO_round", 114 "RXO_itof", 115 116 "RXO_bset", /* d |= (1<<s) */ 117 "RXO_bclr", /* d &= ~(1<<s) */ 118 "RXO_btst", /* s & (1<<s2) */ 119 "RXO_bnot", /* d ^= (1<<s) */ 120 "RXO_bmcc", /* d<s> = cond(s2) */ 121 122 "RXO_clrpsw", /* flag index in d */ 123 "RXO_setpsw", /* flag index in d */ 124 "RXO_mvtipl", /* new IPL in s */ 125 126 "RXO_rtfi", 127 "RXO_rte", 128 "RXO_rtd", /* undocumented */ 129 "RXO_brk", 130 "RXO_dbt", /* undocumented */ 131 "RXO_int", /* vector id in s */ 132 "RXO_stop", 133 "RXO_wait", 134 135 "RXO_sccnd", /* d = cond(s) ? 1 : 0 */ 136 }; 137 138 static const char * optype_names[] = { 139 " - ", 140 "#Imm", /* #addend */ 141 " Rn ", /* Rn */ 142 "[Rn]", /* [Rn + addend] */ 143 "Ps++", /* [Rn+] */ 144 "--Pr", /* [-Rn] */ 145 " cc ", /* eq, gtu, etc */ 146 "Flag", /* [UIOSZC] */ 147 "RbRi" /* [Rb + scale * Ri] */ 148 }; 149 150 #define N_RXO (sizeof(id_names)/sizeof(id_names[0])) 151 #define N_RXT (sizeof(optype_names)/sizeof(optype_names[0])) 152 #define N_MAP 30 153 154 static unsigned long long benchmark_start_cycle; 155 static unsigned long long benchmark_end_cycle; 156 157 static int op_cache[N_RXT][N_RXT][N_RXT]; 158 static int op_cache_rev[N_MAP]; 159 static int op_cache_idx = 0; 160 161 static int 162 op_lookup (int a, int b, int c) 163 { 164 if (op_cache[a][b][c]) 165 return op_cache[a][b][c]; 166 op_cache_idx ++; 167 if (op_cache_idx >= N_MAP) 168 { 169 printf("op_cache_idx exceeds %d\n", N_MAP); 170 exit(1); 171 } 172 op_cache[a][b][c] = op_cache_idx; 173 op_cache_rev[op_cache_idx] = (a<<8) | (b<<4) | c; 174 return op_cache_idx; 175 } 176 177 static char * 178 op_cache_string (int map) 179 { 180 static int ci; 181 static char cb[5][20]; 182 int a, b, c; 183 184 map = op_cache_rev[map]; 185 a = (map >> 8) & 15; 186 b = (map >> 4) & 15; 187 c = (map >> 0) & 15; 188 ci = (ci + 1) % 5; 189 sprintf(cb[ci], "%s %s %s", optype_names[a], optype_names[b], optype_names[c]); 190 return cb[ci]; 191 } 192 193 static unsigned long long cycles_per_id[N_RXO][N_MAP]; 194 static unsigned long long times_per_id[N_RXO][N_MAP]; 195 static unsigned long long memory_stalls; 196 static unsigned long long register_stalls; 197 static unsigned long long branch_stalls; 198 static unsigned long long branch_alignment_stalls; 199 static unsigned long long fast_returns; 200 201 static unsigned long times_per_pair[N_RXO][N_MAP][N_RXO][N_MAP]; 202 static int prev_opcode_id = RXO_unknown; 203 static int po0; 204 205 #define STATS(x) x 206 207 #else 208 #define STATS(x) 209 #endif /* CYCLE_STATS */ 210 211 212 #ifdef CYCLE_ACCURATE 213 214 static int new_rt = -1; 215 216 /* Number of cycles to add if an insn spans an 8-byte boundary. */ 217 static int branch_alignment_penalty = 0; 218 219 #endif 220 221 static int running_benchmark = 1; 222 223 #define tprintf if (trace && running_benchmark) printf 224 225 jmp_buf decode_jmp_buf; 226 unsigned int rx_cycles = 0; 227 228 #ifdef CYCLE_ACCURATE 229 /* If nonzero, memory was read at some point and cycle latency might 230 take effect. */ 231 static int memory_source = 0; 232 /* If nonzero, memory was written and extra cycles might be 233 needed. */ 234 static int memory_dest = 0; 235 236 static void 237 cycles (int throughput) 238 { 239 tprintf("%d cycles\n", throughput); 240 regs.cycle_count += throughput; 241 } 242 243 /* Number of execution (E) cycles the op uses. For memory sources, we 244 include the load micro-op stall as two extra E cycles. */ 245 #define E(c) cycles (memory_source ? c + 2 : c) 246 #define E1 cycles (1) 247 #define E2 cycles (2) 248 #define EBIT cycles (memory_source ? 2 : 1) 249 250 /* Check to see if a read latency must be applied for a given register. */ 251 #define RL(r) \ 252 if (regs.rt == r ) \ 253 { \ 254 tprintf("register %d load stall\n", r); \ 255 regs.cycle_count ++; \ 256 STATS(register_stalls ++); \ 257 regs.rt = -1; \ 258 } 259 260 #define RLD(r) \ 261 if (memory_source) \ 262 { \ 263 tprintf ("Rt now %d\n", r); \ 264 new_rt = r; \ 265 } 266 267 static int 268 lsb_count (unsigned long v, int is_signed) 269 { 270 int i, lsb; 271 if (is_signed && (v & 0x80000000U)) 272 v = (unsigned long)(long)(-v); 273 for (i=31; i>=0; i--) 274 if (v & (1 << i)) 275 { 276 /* v is 0..31, we want 1=1-2, 2=3-4, 3=5-6, etc. */ 277 lsb = (i + 2) / 2; 278 return lsb; 279 } 280 return 0; 281 } 282 283 static int 284 divu_cycles(unsigned long num, unsigned long den) 285 { 286 int nb = lsb_count (num, 0); 287 int db = lsb_count (den, 0); 288 int rv; 289 290 if (nb < db) 291 rv = 2; 292 else 293 rv = 3 + nb - db; 294 E (rv); 295 return rv; 296 } 297 298 static int 299 div_cycles(long num, long den) 300 { 301 int nb = lsb_count ((unsigned long)num, 1); 302 int db = lsb_count ((unsigned long)den, 1); 303 int rv; 304 305 if (nb < db) 306 rv = 3; 307 else 308 rv = 5 + nb - db; 309 E (rv); 310 return rv; 311 } 312 313 #else /* !CYCLE_ACCURATE */ 314 315 #define cycles(t) 316 #define E(c) 317 #define E1 318 #define E2 319 #define EBIT 320 #define RL(r) 321 #define RLD(r) 322 323 #define divu_cycles(n,d) 324 #define div_cycles(n,d) 325 326 #endif /* else CYCLE_ACCURATE */ 327 328 static int size2bytes[] = { 329 4, 1, 1, 1, 2, 2, 2, 3, 4 330 }; 331 332 typedef struct { 333 unsigned long dpc; 334 } RX_Data; 335 336 #define rx_abort() _rx_abort(__FILE__, __LINE__) 337 static void 338 _rx_abort (const char *file, int line) 339 { 340 if (strrchr (file, '/')) 341 file = strrchr (file, '/') + 1; 342 fprintf(stderr, "abort at %s:%d\n", file, line); 343 abort(); 344 } 345 346 static unsigned char *get_byte_base; 347 static RX_Opcode_Decoded **decode_cache_base; 348 static SI get_byte_page; 349 350 void 351 reset_decoder (void) 352 { 353 get_byte_base = 0; 354 decode_cache_base = 0; 355 get_byte_page = 0; 356 } 357 358 static inline void 359 maybe_get_mem_page (SI tpc) 360 { 361 if (((tpc ^ get_byte_page) & NONPAGE_MASK) || enable_counting) 362 { 363 get_byte_page = tpc & NONPAGE_MASK; 364 get_byte_base = rx_mem_ptr (get_byte_page, MPA_READING) - get_byte_page; 365 decode_cache_base = rx_mem_decode_cache (get_byte_page) - get_byte_page; 366 } 367 } 368 369 /* This gets called a *lot* so optimize it. */ 370 static int 371 rx_get_byte (void *vdata) 372 { 373 RX_Data *rx_data = (RX_Data *)vdata; 374 SI tpc = rx_data->dpc; 375 376 /* See load.c for an explanation of this. */ 377 if (rx_big_endian) 378 tpc ^= 3; 379 380 maybe_get_mem_page (tpc); 381 382 rx_data->dpc ++; 383 return get_byte_base [tpc]; 384 } 385 386 static int 387 get_op (const RX_Opcode_Decoded *rd, int i) 388 { 389 const RX_Opcode_Operand *o = rd->op + i; 390 int addr, rv = 0; 391 392 switch (o->type) 393 { 394 case RX_Operand_None: 395 rx_abort (); 396 397 case RX_Operand_Immediate: /* #addend */ 398 return o->addend; 399 400 case RX_Operand_Register: /* Rn */ 401 RL (o->reg); 402 rv = get_reg (o->reg); 403 break; 404 405 case RX_Operand_Predec: /* [-Rn] */ 406 put_reg (o->reg, get_reg (o->reg) - size2bytes[o->size]); 407 /* fall through */ 408 case RX_Operand_Postinc: /* [Rn+] */ 409 case RX_Operand_Indirect: /* [Rn + addend] */ 410 case RX_Operand_TwoReg: /* [Rn + scale * R2] */ 411 #ifdef CYCLE_ACCURATE 412 RL (o->reg); 413 if (o->type == RX_Operand_TwoReg) 414 RL (rd->op[2].reg); 415 regs.rt = -1; 416 if (regs.m2m == M2M_BOTH) 417 { 418 tprintf("src memory stall\n"); 419 #ifdef CYCLE_STATS 420 memory_stalls ++; 421 #endif 422 regs.cycle_count ++; 423 regs.m2m = 0; 424 } 425 426 memory_source = 1; 427 #endif 428 429 if (o->type == RX_Operand_TwoReg) 430 addr = get_reg (o->reg) * size2bytes[rd->size] + get_reg (rd->op[2].reg); 431 else 432 addr = get_reg (o->reg) + o->addend; 433 434 switch (o->size) 435 { 436 case RX_AnySize: 437 rx_abort (); 438 439 case RX_Byte: /* undefined extension */ 440 case RX_UByte: 441 case RX_SByte: 442 rv = mem_get_qi (addr); 443 break; 444 445 case RX_Word: /* undefined extension */ 446 case RX_UWord: 447 case RX_SWord: 448 rv = mem_get_hi (addr); 449 break; 450 451 case RX_3Byte: 452 rv = mem_get_psi (addr); 453 break; 454 455 case RX_Long: 456 rv = mem_get_si (addr); 457 break; 458 } 459 460 if (o->type == RX_Operand_Postinc) 461 put_reg (o->reg, get_reg (o->reg) + size2bytes[o->size]); 462 463 break; 464 465 case RX_Operand_Condition: /* eq, gtu, etc */ 466 return condition_true (o->reg); 467 468 case RX_Operand_Flag: /* [UIOSZC] */ 469 return (regs.r_psw & (1 << o->reg)) ? 1 : 0; 470 } 471 472 /* if we've gotten here, we need to clip/extend the value according 473 to the size. */ 474 switch (o->size) 475 { 476 case RX_AnySize: 477 rx_abort (); 478 479 case RX_Byte: /* undefined extension */ 480 rv |= 0xdeadbe00; /* keep them honest */ 481 break; 482 483 case RX_UByte: 484 rv &= 0xff; 485 break; 486 487 case RX_SByte: 488 rv = sign_ext (rv, 8); 489 break; 490 491 case RX_Word: /* undefined extension */ 492 rv |= 0xdead0000; /* keep them honest */ 493 break; 494 495 case RX_UWord: 496 rv &= 0xffff; 497 break; 498 499 case RX_SWord: 500 rv = sign_ext (rv, 16); 501 break; 502 503 case RX_3Byte: 504 rv &= 0xffffff; 505 break; 506 507 case RX_Long: 508 break; 509 } 510 return rv; 511 } 512 513 static void 514 put_op (const RX_Opcode_Decoded *rd, int i, int v) 515 { 516 const RX_Opcode_Operand *o = rd->op + i; 517 int addr; 518 519 switch (o->size) 520 { 521 case RX_AnySize: 522 if (o->type != RX_Operand_Register) 523 rx_abort (); 524 break; 525 526 case RX_Byte: /* undefined extension */ 527 v |= 0xdeadbe00; /* keep them honest */ 528 break; 529 530 case RX_UByte: 531 v &= 0xff; 532 break; 533 534 case RX_SByte: 535 v = sign_ext (v, 8); 536 break; 537 538 case RX_Word: /* undefined extension */ 539 v |= 0xdead0000; /* keep them honest */ 540 break; 541 542 case RX_UWord: 543 v &= 0xffff; 544 break; 545 546 case RX_SWord: 547 v = sign_ext (v, 16); 548 break; 549 550 case RX_3Byte: 551 v &= 0xffffff; 552 break; 553 554 case RX_Long: 555 break; 556 } 557 558 switch (o->type) 559 { 560 case RX_Operand_None: 561 /* Opcodes like TST and CMP use this. */ 562 break; 563 564 case RX_Operand_Immediate: /* #addend */ 565 case RX_Operand_Condition: /* eq, gtu, etc */ 566 rx_abort (); 567 568 case RX_Operand_Register: /* Rn */ 569 put_reg (o->reg, v); 570 RLD (o->reg); 571 break; 572 573 case RX_Operand_Predec: /* [-Rn] */ 574 put_reg (o->reg, get_reg (o->reg) - size2bytes[o->size]); 575 /* fall through */ 576 case RX_Operand_Postinc: /* [Rn+] */ 577 case RX_Operand_Indirect: /* [Rn + addend] */ 578 case RX_Operand_TwoReg: /* [Rn + scale * R2] */ 579 580 #ifdef CYCLE_ACCURATE 581 if (regs.m2m == M2M_BOTH) 582 { 583 tprintf("dst memory stall\n"); 584 regs.cycle_count ++; 585 #ifdef CYCLE_STATS 586 memory_stalls ++; 587 #endif 588 regs.m2m = 0; 589 } 590 memory_dest = 1; 591 #endif 592 593 if (o->type == RX_Operand_TwoReg) 594 addr = get_reg (o->reg) * size2bytes[rd->size] + get_reg (rd->op[2].reg); 595 else 596 addr = get_reg (o->reg) + o->addend; 597 598 switch (o->size) 599 { 600 case RX_AnySize: 601 rx_abort (); 602 603 case RX_Byte: /* undefined extension */ 604 case RX_UByte: 605 case RX_SByte: 606 mem_put_qi (addr, v); 607 break; 608 609 case RX_Word: /* undefined extension */ 610 case RX_UWord: 611 case RX_SWord: 612 mem_put_hi (addr, v); 613 break; 614 615 case RX_3Byte: 616 mem_put_psi (addr, v); 617 break; 618 619 case RX_Long: 620 mem_put_si (addr, v); 621 break; 622 } 623 624 if (o->type == RX_Operand_Postinc) 625 put_reg (o->reg, get_reg (o->reg) + size2bytes[o->size]); 626 627 break; 628 629 case RX_Operand_Flag: /* [UIOSZC] */ 630 if (v) 631 regs.r_psw |= (1 << o->reg); 632 else 633 regs.r_psw &= ~(1 << o->reg); 634 break; 635 } 636 } 637 638 #define PD(x) put_op (opcode, 0, x) 639 #define PS(x) put_op (opcode, 1, x) 640 #define PS2(x) put_op (opcode, 2, x) 641 #define GD() get_op (opcode, 0) 642 #define GS() get_op (opcode, 1) 643 #define GS2() get_op (opcode, 2) 644 #define DSZ() size2bytes[opcode->op[0].size] 645 #define SSZ() size2bytes[opcode->op[0].size] 646 #define S2SZ() size2bytes[opcode->op[0].size] 647 648 /* "Universal" sources. */ 649 #define US1() ((opcode->op[2].type == RX_Operand_None) ? GD() : GS()) 650 #define US2() ((opcode->op[2].type == RX_Operand_None) ? GS() : GS2()) 651 652 static void 653 push(int val) 654 { 655 int rsp = get_reg (sp); 656 rsp -= 4; 657 put_reg (sp, rsp); 658 mem_put_si (rsp, val); 659 } 660 661 /* Just like the above, but tag the memory as "pushed pc" so if anyone 662 tries to write to it, it will cause an error. */ 663 static void 664 pushpc(int val) 665 { 666 int rsp = get_reg (sp); 667 rsp -= 4; 668 put_reg (sp, rsp); 669 mem_put_si (rsp, val); 670 mem_set_content_range (rsp, rsp+3, MC_PUSHED_PC); 671 } 672 673 static int 674 pop() 675 { 676 int rv; 677 int rsp = get_reg (sp); 678 rv = mem_get_si (rsp); 679 rsp += 4; 680 put_reg (sp, rsp); 681 return rv; 682 } 683 684 static int 685 poppc() 686 { 687 int rv; 688 int rsp = get_reg (sp); 689 if (mem_get_content_type (rsp) != MC_PUSHED_PC) 690 execution_error (SIM_ERR_CORRUPT_STACK, rsp); 691 rv = mem_get_si (rsp); 692 mem_set_content_range (rsp, rsp+3, MC_UNINIT); 693 rsp += 4; 694 put_reg (sp, rsp); 695 return rv; 696 } 697 698 #define MATH_OP(vop,c) \ 699 { \ 700 umb = US2(); \ 701 uma = US1(); \ 702 ll = (unsigned long long) uma vop (unsigned long long) umb vop c; \ 703 tprintf ("0x%x " #vop " 0x%x " #vop " 0x%x = 0x%llx\n", uma, umb, c, ll); \ 704 ma = sign_ext (uma, DSZ() * 8); \ 705 mb = sign_ext (umb, DSZ() * 8); \ 706 sll = (long long) ma vop (long long) mb vop c; \ 707 tprintf ("%d " #vop " %d " #vop " %d = %lld\n", ma, mb, c, sll); \ 708 set_oszc (sll, DSZ(), (long long) ll > ((1 vop 1) ? (long long) b2mask[DSZ()] : (long long) -1)); \ 709 PD (sll); \ 710 E (1); \ 711 } 712 713 #define LOGIC_OP(vop) \ 714 { \ 715 mb = US2(); \ 716 ma = US1(); \ 717 v = ma vop mb; \ 718 tprintf("0x%x " #vop " 0x%x = 0x%x\n", ma, mb, v); \ 719 set_sz (v, DSZ()); \ 720 PD(v); \ 721 E (1); \ 722 } 723 724 #define SHIFT_OP(val, type, count, OP, carry_mask) \ 725 { \ 726 int i, c=0; \ 727 count = US2(); \ 728 val = (type)US1(); \ 729 tprintf("%lld " #OP " %d\n", val, count); \ 730 for (i = 0; i < count; i ++) \ 731 { \ 732 c = val & carry_mask; \ 733 val OP 1; \ 734 } \ 735 set_oszc (val, 4, c); \ 736 PD (val); \ 737 } 738 739 typedef union { 740 int i; 741 float f; 742 } FloatInt; 743 744 static inline int 745 float2int (float f) 746 { 747 FloatInt fi; 748 fi.f = f; 749 return fi.i; 750 } 751 752 static inline float 753 int2float (int i) 754 { 755 FloatInt fi; 756 fi.i = i; 757 return fi.f; 758 } 759 760 static int 761 fop_fadd (fp_t s1, fp_t s2, fp_t *d) 762 { 763 *d = rxfp_add (s1, s2); 764 return 1; 765 } 766 767 static int 768 fop_fmul (fp_t s1, fp_t s2, fp_t *d) 769 { 770 *d = rxfp_mul (s1, s2); 771 return 1; 772 } 773 774 static int 775 fop_fdiv (fp_t s1, fp_t s2, fp_t *d) 776 { 777 *d = rxfp_div (s1, s2); 778 return 1; 779 } 780 781 static int 782 fop_fsub (fp_t s1, fp_t s2, fp_t *d) 783 { 784 *d = rxfp_sub (s1, s2); 785 return 1; 786 } 787 788 #define FPPENDING() (regs.r_fpsw & (FPSWBITS_CE | (FPSWBITS_FMASK & (regs.r_fpsw << FPSW_EFSH)))) 789 #define FPCLEAR() regs.r_fpsw &= FPSWBITS_CLEAR 790 #define FPCHECK() \ 791 if (FPPENDING()) \ 792 return do_fp_exception (opcode_pc) 793 794 #define FLOAT_OP(func) \ 795 { \ 796 int do_store; \ 797 fp_t fa, fb, fc; \ 798 FPCLEAR(); \ 799 fb = GS (); \ 800 fa = GD (); \ 801 do_store = fop_##func (fa, fb, &fc); \ 802 tprintf("%g " #func " %g = %g %08x\n", int2float(fa), int2float(fb), int2float(fc), fc); \ 803 FPCHECK(); \ 804 if (do_store) \ 805 PD (fc); \ 806 mb = 0; \ 807 if ((fc & 0x80000000UL) != 0) \ 808 mb |= FLAGBIT_S; \ 809 if ((fc & 0x7fffffffUL) == 0) \ 810 mb |= FLAGBIT_Z; \ 811 set_flags (FLAGBIT_S | FLAGBIT_Z, mb); \ 812 } 813 814 #define carry (FLAG_C ? 1 : 0) 815 816 static struct { 817 unsigned long vaddr; 818 const char *str; 819 int signal; 820 } exception_info[] = { 821 { 0xFFFFFFD0UL, "priviledged opcode", SIGILL }, 822 { 0xFFFFFFD4UL, "access violation", SIGSEGV }, 823 { 0xFFFFFFDCUL, "undefined opcode", SIGILL }, 824 { 0xFFFFFFE4UL, "floating point", SIGFPE } 825 }; 826 #define EX_PRIVILEDGED 0 827 #define EX_ACCESS 1 828 #define EX_UNDEFINED 2 829 #define EX_FLOATING 3 830 #define EXCEPTION(n) \ 831 return generate_exception (n, opcode_pc) 832 833 #define PRIVILEDGED() \ 834 if (FLAG_PM) \ 835 EXCEPTION (EX_PRIVILEDGED) 836 837 static int 838 generate_exception (unsigned long type, SI opcode_pc) 839 { 840 SI old_psw, old_pc, new_pc; 841 842 new_pc = mem_get_si (exception_info[type].vaddr); 843 /* 0x00020000 is the value used to initialise the known 844 exception vectors (see rx.ld), but it is a reserved 845 area of memory so do not try to access it, and if the 846 value has not been changed by the program then the 847 vector has not been installed. */ 848 if (new_pc == 0 || new_pc == 0x00020000) 849 { 850 if (rx_in_gdb) 851 return RX_MAKE_STOPPED (exception_info[type].signal); 852 853 fprintf(stderr, "Unhandled %s exception at pc = %#lx\n", 854 exception_info[type].str, (unsigned long) opcode_pc); 855 if (type == EX_FLOATING) 856 { 857 int mask = FPPENDING (); 858 fprintf (stderr, "Pending FP exceptions:"); 859 if (mask & FPSWBITS_FV) 860 fprintf(stderr, " Invalid"); 861 if (mask & FPSWBITS_FO) 862 fprintf(stderr, " Overflow"); 863 if (mask & FPSWBITS_FZ) 864 fprintf(stderr, " Division-by-zero"); 865 if (mask & FPSWBITS_FU) 866 fprintf(stderr, " Underflow"); 867 if (mask & FPSWBITS_FX) 868 fprintf(stderr, " Inexact"); 869 if (mask & FPSWBITS_CE) 870 fprintf(stderr, " Unimplemented"); 871 fprintf(stderr, "\n"); 872 } 873 return RX_MAKE_EXITED (1); 874 } 875 876 tprintf ("Triggering %s exception\n", exception_info[type].str); 877 878 old_psw = regs.r_psw; 879 regs.r_psw &= ~ (FLAGBIT_I | FLAGBIT_U | FLAGBIT_PM); 880 old_pc = opcode_pc; 881 regs.r_pc = new_pc; 882 pushpc (old_psw); 883 pushpc (old_pc); 884 return RX_MAKE_STEPPED (); 885 } 886 887 void 888 generate_access_exception (void) 889 { 890 int rv; 891 892 rv = generate_exception (EX_ACCESS, regs.r_pc); 893 if (RX_EXITED (rv)) 894 longjmp (decode_jmp_buf, rv); 895 } 896 897 static int 898 do_fp_exception (unsigned long opcode_pc) 899 { 900 while (FPPENDING()) 901 EXCEPTION (EX_FLOATING); 902 return RX_MAKE_STEPPED (); 903 } 904 905 static int 906 op_is_memory (const RX_Opcode_Decoded *rd, int i) 907 { 908 switch (rd->op[i].type) 909 { 910 case RX_Operand_Predec: 911 case RX_Operand_Postinc: 912 case RX_Operand_Indirect: 913 return 1; 914 default: 915 return 0; 916 } 917 } 918 #define OM(i) op_is_memory (opcode, i) 919 920 #define DO_RETURN(x) { longjmp (decode_jmp_buf, x); } 921 922 int 923 decode_opcode () 924 { 925 unsigned int uma=0, umb=0; 926 int ma=0, mb=0; 927 int opcode_size, v; 928 unsigned long long ll; 929 long long sll; 930 unsigned long opcode_pc; 931 RX_Data rx_data; 932 const RX_Opcode_Decoded *opcode; 933 #ifdef CYCLE_STATS 934 unsigned long long prev_cycle_count; 935 #endif 936 #ifdef CYCLE_ACCURATE 937 unsigned int tx; 938 #endif 939 940 #ifdef CYCLE_STATS 941 prev_cycle_count = regs.cycle_count; 942 #endif 943 944 #ifdef CYCLE_ACCURATE 945 memory_source = 0; 946 memory_dest = 0; 947 #endif 948 949 rx_cycles ++; 950 951 maybe_get_mem_page (regs.r_pc); 952 953 opcode_pc = regs.r_pc; 954 955 /* Note that we don't word-swap this point, there's no point. */ 956 if (decode_cache_base[opcode_pc] == NULL) 957 { 958 RX_Opcode_Decoded *opcode_w; 959 rx_data.dpc = opcode_pc; 960 opcode_w = decode_cache_base[opcode_pc] = calloc (1, sizeof (RX_Opcode_Decoded)); 961 opcode_size = rx_decode_opcode (opcode_pc, opcode_w, 962 rx_get_byte, &rx_data); 963 opcode = opcode_w; 964 } 965 else 966 { 967 opcode = decode_cache_base[opcode_pc]; 968 opcode_size = opcode->n_bytes; 969 } 970 971 #ifdef CYCLE_ACCURATE 972 if (branch_alignment_penalty) 973 { 974 if ((regs.r_pc ^ (regs.r_pc + opcode_size - 1)) & ~7) 975 { 976 tprintf("1 cycle branch alignment penalty\n"); 977 cycles (branch_alignment_penalty); 978 #ifdef CYCLE_STATS 979 branch_alignment_stalls ++; 980 #endif 981 } 982 branch_alignment_penalty = 0; 983 } 984 #endif 985 986 regs.r_pc += opcode_size; 987 988 rx_flagmask = opcode->flags_s; 989 rx_flagand = ~(int)opcode->flags_0; 990 rx_flagor = opcode->flags_1; 991 992 switch (opcode->id) 993 { 994 case RXO_abs: 995 sll = GS (); 996 tprintf("|%lld| = ", sll); 997 if (sll < 0) 998 sll = -sll; 999 tprintf("%lld\n", sll); 1000 PD (sll); 1001 set_osz (sll, 4); 1002 E (1); 1003 break; 1004 1005 case RXO_adc: 1006 MATH_OP (+,carry); 1007 break; 1008 1009 case RXO_add: 1010 MATH_OP (+,0); 1011 break; 1012 1013 case RXO_and: 1014 LOGIC_OP (&); 1015 break; 1016 1017 case RXO_bclr: 1018 ma = GD (); 1019 mb = GS (); 1020 if (opcode->op[0].type == RX_Operand_Register) 1021 mb &= 0x1f; 1022 else 1023 mb &= 0x07; 1024 ma &= ~(1 << mb); 1025 PD (ma); 1026 EBIT; 1027 break; 1028 1029 case RXO_bmcc: 1030 ma = GD (); 1031 mb = GS (); 1032 if (opcode->op[0].type == RX_Operand_Register) 1033 mb &= 0x1f; 1034 else 1035 mb &= 0x07; 1036 if (GS2 ()) 1037 ma |= (1 << mb); 1038 else 1039 ma &= ~(1 << mb); 1040 PD (ma); 1041 EBIT; 1042 break; 1043 1044 case RXO_bnot: 1045 ma = GD (); 1046 mb = GS (); 1047 if (opcode->op[0].type == RX_Operand_Register) 1048 mb &= 0x1f; 1049 else 1050 mb &= 0x07; 1051 ma ^= (1 << mb); 1052 PD (ma); 1053 EBIT; 1054 break; 1055 1056 case RXO_branch: 1057 if (opcode->op[1].type == RX_Operand_None || GS()) 1058 { 1059 #ifdef CYCLE_ACCURATE 1060 SI old_pc = regs.r_pc; 1061 int delta; 1062 #endif 1063 regs.r_pc = GD(); 1064 #ifdef CYCLE_ACCURATE 1065 delta = regs.r_pc - old_pc; 1066 if (delta >= 0 && delta < 16 1067 && opcode_size > 1) 1068 { 1069 tprintf("near forward branch bonus\n"); 1070 cycles (2); 1071 } 1072 else 1073 { 1074 cycles (3); 1075 branch_alignment_penalty = 1; 1076 } 1077 #ifdef CYCLE_STATS 1078 branch_stalls ++; 1079 #endif 1080 #endif 1081 } 1082 #ifdef CYCLE_ACCURATE 1083 else 1084 cycles (1); 1085 #endif 1086 break; 1087 1088 case RXO_branchrel: 1089 if (opcode->op[1].type == RX_Operand_None || GS()) 1090 { 1091 int delta = GD(); 1092 regs.r_pc = opcode_pc + delta; 1093 #ifdef CYCLE_ACCURATE 1094 /* Note: specs say 3, chip says 2. */ 1095 if (delta >= 0 && delta < 16 1096 && opcode_size > 1) 1097 { 1098 tprintf("near forward branch bonus\n"); 1099 cycles (2); 1100 } 1101 else 1102 { 1103 cycles (3); 1104 branch_alignment_penalty = 1; 1105 } 1106 #ifdef CYCLE_STATS 1107 branch_stalls ++; 1108 #endif 1109 #endif 1110 } 1111 #ifdef CYCLE_ACCURATE 1112 else 1113 cycles (1); 1114 #endif 1115 break; 1116 1117 case RXO_brk: 1118 { 1119 int old_psw = regs.r_psw; 1120 if (rx_in_gdb) 1121 DO_RETURN (RX_MAKE_HIT_BREAK ()); 1122 if (regs.r_intb == 0) 1123 { 1124 tprintf("BREAK hit, no vector table.\n"); 1125 DO_RETURN (RX_MAKE_EXITED(1)); 1126 } 1127 regs.r_psw &= ~(FLAGBIT_I | FLAGBIT_U | FLAGBIT_PM); 1128 pushpc (old_psw); 1129 pushpc (regs.r_pc); 1130 regs.r_pc = mem_get_si (regs.r_intb); 1131 cycles(6); 1132 } 1133 break; 1134 1135 case RXO_bset: 1136 ma = GD (); 1137 mb = GS (); 1138 if (opcode->op[0].type == RX_Operand_Register) 1139 mb &= 0x1f; 1140 else 1141 mb &= 0x07; 1142 ma |= (1 << mb); 1143 PD (ma); 1144 EBIT; 1145 break; 1146 1147 case RXO_btst: 1148 ma = GS (); 1149 mb = GS2 (); 1150 if (opcode->op[1].type == RX_Operand_Register) 1151 mb &= 0x1f; 1152 else 1153 mb &= 0x07; 1154 umb = ma & (1 << mb); 1155 set_zc (! umb, umb); 1156 EBIT; 1157 break; 1158 1159 case RXO_clrpsw: 1160 v = 1 << opcode->op[0].reg; 1161 if (FLAG_PM 1162 && (v == FLAGBIT_I 1163 || v == FLAGBIT_U)) 1164 break; 1165 regs.r_psw &= ~v; 1166 cycles (1); 1167 break; 1168 1169 case RXO_div: /* d = d / s */ 1170 ma = GS(); 1171 mb = GD(); 1172 tprintf("%d / %d = ", mb, ma); 1173 if (ma == 0 || (ma == -1 && (unsigned int) mb == 0x80000000)) 1174 { 1175 tprintf("#NAN\n"); 1176 set_flags (FLAGBIT_O, FLAGBIT_O); 1177 cycles (3); 1178 } 1179 else 1180 { 1181 v = mb/ma; 1182 tprintf("%d\n", v); 1183 set_flags (FLAGBIT_O, 0); 1184 PD (v); 1185 div_cycles (mb, ma); 1186 } 1187 break; 1188 1189 case RXO_divu: /* d = d / s */ 1190 uma = GS(); 1191 umb = GD(); 1192 tprintf("%u / %u = ", umb, uma); 1193 if (uma == 0) 1194 { 1195 tprintf("#NAN\n"); 1196 set_flags (FLAGBIT_O, FLAGBIT_O); 1197 cycles (2); 1198 } 1199 else 1200 { 1201 v = umb / uma; 1202 tprintf("%u\n", v); 1203 set_flags (FLAGBIT_O, 0); 1204 PD (v); 1205 divu_cycles (umb, uma); 1206 } 1207 break; 1208 1209 case RXO_emul: 1210 ma = GD (); 1211 mb = GS (); 1212 sll = (long long)ma * (long long)mb; 1213 tprintf("%d * %d = %lld\n", ma, mb, sll); 1214 put_reg (opcode->op[0].reg, sll); 1215 put_reg (opcode->op[0].reg + 1, sll >> 32); 1216 E2; 1217 break; 1218 1219 case RXO_emulu: 1220 uma = GD (); 1221 umb = GS (); 1222 ll = (long long)uma * (long long)umb; 1223 tprintf("%#x * %#x = %#llx\n", uma, umb, ll); 1224 put_reg (opcode->op[0].reg, ll); 1225 put_reg (opcode->op[0].reg + 1, ll >> 32); 1226 E2; 1227 break; 1228 1229 case RXO_fadd: 1230 FLOAT_OP (fadd); 1231 E (4); 1232 break; 1233 1234 case RXO_fcmp: 1235 ma = GD(); 1236 mb = GS(); 1237 FPCLEAR (); 1238 rxfp_cmp (ma, mb); 1239 FPCHECK (); 1240 E (1); 1241 break; 1242 1243 case RXO_fdiv: 1244 FLOAT_OP (fdiv); 1245 E (16); 1246 break; 1247 1248 case RXO_fmul: 1249 FLOAT_OP (fmul); 1250 E (3); 1251 break; 1252 1253 case RXO_rtfi: 1254 PRIVILEDGED (); 1255 regs.r_psw = regs.r_bpsw; 1256 regs.r_pc = regs.r_bpc; 1257 #ifdef CYCLE_ACCURATE 1258 regs.fast_return = 0; 1259 cycles(3); 1260 #endif 1261 break; 1262 1263 case RXO_fsub: 1264 FLOAT_OP (fsub); 1265 E (4); 1266 break; 1267 1268 case RXO_ftoi: 1269 ma = GS (); 1270 FPCLEAR (); 1271 mb = rxfp_ftoi (ma, FPRM_ZERO); 1272 FPCHECK (); 1273 PD (mb); 1274 tprintf("(int) %g = %d\n", int2float(ma), mb); 1275 set_sz (mb, 4); 1276 E (2); 1277 break; 1278 1279 case RXO_int: 1280 v = GS (); 1281 if (v == 255) 1282 { 1283 int rc = rx_syscall (regs.r[5]); 1284 if (! RX_STEPPED (rc)) 1285 DO_RETURN (rc); 1286 } 1287 else 1288 { 1289 int old_psw = regs.r_psw; 1290 regs.r_psw &= ~(FLAGBIT_I | FLAGBIT_U | FLAGBIT_PM); 1291 pushpc (old_psw); 1292 pushpc (regs.r_pc); 1293 regs.r_pc = mem_get_si (regs.r_intb + 4 * v); 1294 } 1295 cycles (6); 1296 break; 1297 1298 case RXO_itof: 1299 ma = GS (); 1300 FPCLEAR (); 1301 mb = rxfp_itof (ma, regs.r_fpsw); 1302 FPCHECK (); 1303 tprintf("(float) %d = %x\n", ma, mb); 1304 PD (mb); 1305 set_sz (ma, 4); 1306 E (2); 1307 break; 1308 1309 case RXO_jsr: 1310 case RXO_jsrrel: 1311 { 1312 #ifdef CYCLE_ACCURATE 1313 int delta; 1314 regs.m2m = 0; 1315 #endif 1316 v = GD (); 1317 #ifdef CYCLE_ACCURATE 1318 regs.link_register = regs.r_pc; 1319 #endif 1320 pushpc (get_reg (pc)); 1321 if (opcode->id == RXO_jsrrel) 1322 v += regs.r_pc; 1323 #ifdef CYCLE_ACCURATE 1324 delta = v - regs.r_pc; 1325 #endif 1326 put_reg (pc, v); 1327 #ifdef CYCLE_ACCURATE 1328 /* Note: docs say 3, chip says 2 */ 1329 if (delta >= 0 && delta < 16) 1330 { 1331 tprintf ("near forward jsr bonus\n"); 1332 cycles (2); 1333 } 1334 else 1335 { 1336 branch_alignment_penalty = 1; 1337 cycles (3); 1338 } 1339 regs.fast_return = 1; 1340 #endif 1341 } 1342 break; 1343 1344 case RXO_machi: 1345 ll = (long long)(signed short)(GS() >> 16) * (long long)(signed short)(GS2 () >> 16); 1346 ll <<= 16; 1347 put_reg64 (acc64, ll + regs.r_acc); 1348 E1; 1349 break; 1350 1351 case RXO_maclo: 1352 ll = (long long)(signed short)(GS()) * (long long)(signed short)(GS2 ()); 1353 ll <<= 16; 1354 put_reg64 (acc64, ll + regs.r_acc); 1355 E1; 1356 break; 1357 1358 case RXO_max: 1359 mb = GS(); 1360 ma = GD(); 1361 if (ma > mb) 1362 PD (ma); 1363 else 1364 PD (mb); 1365 E (1); 1366 break; 1367 1368 case RXO_min: 1369 mb = GS(); 1370 ma = GD(); 1371 if (ma < mb) 1372 PD (ma); 1373 else 1374 PD (mb); 1375 E (1); 1376 break; 1377 1378 case RXO_mov: 1379 v = GS (); 1380 1381 if (opcode->op[1].type == RX_Operand_Register 1382 && opcode->op[1].reg == 17 /* PC */) 1383 { 1384 /* Special case. We want the address of the insn, not the 1385 address of the next insn. */ 1386 v = opcode_pc; 1387 } 1388 1389 if (opcode->op[0].type == RX_Operand_Register 1390 && opcode->op[0].reg == 16 /* PSW */) 1391 { 1392 /* Special case, LDC and POPC can't ever modify PM. */ 1393 int pm = regs.r_psw & FLAGBIT_PM; 1394 v &= ~ FLAGBIT_PM; 1395 v |= pm; 1396 if (pm) 1397 { 1398 v &= ~ (FLAGBIT_I | FLAGBIT_U | FLAGBITS_IPL); 1399 v |= pm; 1400 } 1401 } 1402 if (FLAG_PM) 1403 { 1404 /* various things can't be changed in user mode. */ 1405 if (opcode->op[0].type == RX_Operand_Register) 1406 if (opcode->op[0].reg == 32) 1407 { 1408 v &= ~ (FLAGBIT_I | FLAGBIT_U | FLAGBITS_IPL); 1409 v |= regs.r_psw & (FLAGBIT_I | FLAGBIT_U | FLAGBITS_IPL); 1410 } 1411 if (opcode->op[0].reg == 34 /* ISP */ 1412 || opcode->op[0].reg == 37 /* BPSW */ 1413 || opcode->op[0].reg == 39 /* INTB */ 1414 || opcode->op[0].reg == 38 /* VCT */) 1415 /* These are ignored. */ 1416 break; 1417 } 1418 if (OM(0) && OM(1)) 1419 cycles (2); 1420 else 1421 cycles (1); 1422 1423 PD (v); 1424 1425 #ifdef CYCLE_ACCURATE 1426 if ((opcode->op[0].type == RX_Operand_Predec 1427 && opcode->op[1].type == RX_Operand_Register) 1428 || (opcode->op[0].type == RX_Operand_Postinc 1429 && opcode->op[1].type == RX_Operand_Register)) 1430 { 1431 /* Special case: push reg doesn't cause a memory stall. */ 1432 memory_dest = 0; 1433 tprintf("push special case\n"); 1434 } 1435 #endif 1436 1437 set_sz (v, DSZ()); 1438 break; 1439 1440 case RXO_movbi: 1441 PD (GS ()); 1442 cycles (1); 1443 break; 1444 1445 case RXO_movbir: 1446 PS (GD ()); 1447 cycles (1); 1448 break; 1449 1450 case RXO_mul: 1451 v = US2 (); 1452 ll = (unsigned long long) US1() * (unsigned long long) v; 1453 PD(ll); 1454 E (1); 1455 break; 1456 1457 case RXO_mulhi: 1458 v = GS2 (); 1459 ll = (long long)(signed short)(GS() >> 16) * (long long)(signed short)(v >> 16); 1460 ll <<= 16; 1461 put_reg64 (acc64, ll); 1462 E1; 1463 break; 1464 1465 case RXO_mullo: 1466 v = GS2 (); 1467 ll = (long long)(signed short)(GS()) * (long long)(signed short)(v); 1468 ll <<= 16; 1469 put_reg64 (acc64, ll); 1470 E1; 1471 break; 1472 1473 case RXO_mvfachi: 1474 PD (get_reg (acchi)); 1475 E1; 1476 break; 1477 1478 case RXO_mvfaclo: 1479 PD (get_reg (acclo)); 1480 E1; 1481 break; 1482 1483 case RXO_mvfacmi: 1484 PD (get_reg (accmi)); 1485 E1; 1486 break; 1487 1488 case RXO_mvtachi: 1489 put_reg (acchi, GS ()); 1490 E1; 1491 break; 1492 1493 case RXO_mvtaclo: 1494 put_reg (acclo, GS ()); 1495 E1; 1496 break; 1497 1498 case RXO_mvtipl: 1499 regs.r_psw &= ~ FLAGBITS_IPL; 1500 regs.r_psw |= (GS () << FLAGSHIFT_IPL) & FLAGBITS_IPL; 1501 E1; 1502 break; 1503 1504 case RXO_nop: 1505 case RXO_nop2: 1506 case RXO_nop3: 1507 E1; 1508 break; 1509 1510 case RXO_or: 1511 LOGIC_OP (|); 1512 break; 1513 1514 case RXO_popm: 1515 /* POPM cannot pop R0 (sp). */ 1516 if (opcode->op[1].reg == 0 || opcode->op[2].reg == 0) 1517 EXCEPTION (EX_UNDEFINED); 1518 if (opcode->op[1].reg >= opcode->op[2].reg) 1519 { 1520 regs.r_pc = opcode_pc; 1521 DO_RETURN (RX_MAKE_STOPPED (SIGILL)); 1522 } 1523 for (v = opcode->op[1].reg; v <= opcode->op[2].reg; v++) 1524 { 1525 cycles (1); 1526 RLD (v); 1527 put_reg (v, pop ()); 1528 } 1529 break; 1530 1531 case RXO_pushm: 1532 /* PUSHM cannot push R0 (sp). */ 1533 if (opcode->op[1].reg == 0 || opcode->op[2].reg == 0) 1534 EXCEPTION (EX_UNDEFINED); 1535 if (opcode->op[1].reg >= opcode->op[2].reg) 1536 { 1537 regs.r_pc = opcode_pc; 1538 return RX_MAKE_STOPPED (SIGILL); 1539 } 1540 for (v = opcode->op[2].reg; v >= opcode->op[1].reg; v--) 1541 { 1542 RL (v); 1543 push (get_reg (v)); 1544 } 1545 cycles (opcode->op[2].reg - opcode->op[1].reg + 1); 1546 break; 1547 1548 case RXO_racw: 1549 ll = get_reg64 (acc64) << GS (); 1550 ll += 0x80000000ULL; 1551 if ((signed long long)ll > (signed long long)0x00007fff00000000ULL) 1552 ll = 0x00007fff00000000ULL; 1553 else if ((signed long long)ll < (signed long long)0xffff800000000000ULL) 1554 ll = 0xffff800000000000ULL; 1555 else 1556 ll &= 0xffffffff00000000ULL; 1557 put_reg64 (acc64, ll); 1558 E1; 1559 break; 1560 1561 case RXO_rte: 1562 PRIVILEDGED (); 1563 regs.r_pc = poppc (); 1564 regs.r_psw = poppc (); 1565 if (FLAG_PM) 1566 regs.r_psw |= FLAGBIT_U; 1567 #ifdef CYCLE_ACCURATE 1568 regs.fast_return = 0; 1569 cycles (6); 1570 #endif 1571 break; 1572 1573 case RXO_revl: 1574 uma = GS (); 1575 umb = (((uma >> 24) & 0xff) 1576 | ((uma >> 8) & 0xff00) 1577 | ((uma << 8) & 0xff0000) 1578 | ((uma << 24) & 0xff000000UL)); 1579 PD (umb); 1580 E1; 1581 break; 1582 1583 case RXO_revw: 1584 uma = GS (); 1585 umb = (((uma >> 8) & 0x00ff00ff) 1586 | ((uma << 8) & 0xff00ff00UL)); 1587 PD (umb); 1588 E1; 1589 break; 1590 1591 case RXO_rmpa: 1592 RL(4); 1593 RL(5); 1594 #ifdef CYCLE_ACCURATE 1595 tx = regs.r[3]; 1596 #endif 1597 1598 while (regs.r[3] != 0) 1599 { 1600 long long tmp; 1601 1602 switch (opcode->size) 1603 { 1604 case RX_Long: 1605 ma = mem_get_si (regs.r[1]); 1606 mb = mem_get_si (regs.r[2]); 1607 regs.r[1] += 4; 1608 regs.r[2] += 4; 1609 break; 1610 case RX_Word: 1611 ma = sign_ext (mem_get_hi (regs.r[1]), 16); 1612 mb = sign_ext (mem_get_hi (regs.r[2]), 16); 1613 regs.r[1] += 2; 1614 regs.r[2] += 2; 1615 break; 1616 case RX_Byte: 1617 ma = sign_ext (mem_get_qi (regs.r[1]), 8); 1618 mb = sign_ext (mem_get_qi (regs.r[2]), 8); 1619 regs.r[1] += 1; 1620 regs.r[2] += 1; 1621 break; 1622 default: 1623 abort (); 1624 } 1625 /* We do the multiply as a signed value. */ 1626 sll = (long long)ma * (long long)mb; 1627 tprintf(" %016llx = %d * %d\n", sll, ma, mb); 1628 /* but we do the sum as unsigned, while sign extending the operands. */ 1629 tmp = regs.r[4] + (sll & 0xffffffffUL); 1630 regs.r[4] = tmp & 0xffffffffUL; 1631 tmp >>= 32; 1632 sll >>= 32; 1633 tmp += regs.r[5] + (sll & 0xffffffffUL); 1634 regs.r[5] = tmp & 0xffffffffUL; 1635 tmp >>= 32; 1636 sll >>= 32; 1637 tmp += regs.r[6] + (sll & 0xffffffffUL); 1638 regs.r[6] = tmp & 0xffffffffUL; 1639 tprintf("%08lx\033[36m%08lx\033[0m%08lx\n", 1640 (unsigned long) regs.r[6], 1641 (unsigned long) regs.r[5], 1642 (unsigned long) regs.r[4]); 1643 1644 regs.r[3] --; 1645 } 1646 if (regs.r[6] & 0x00008000) 1647 regs.r[6] |= 0xffff0000UL; 1648 else 1649 regs.r[6] &= 0x0000ffff; 1650 ma = (regs.r[6] & 0x80000000UL) ? FLAGBIT_S : 0; 1651 if (regs.r[6] != 0 && regs.r[6] != 0xffffffffUL) 1652 set_flags (FLAGBIT_O|FLAGBIT_S, ma | FLAGBIT_O); 1653 else 1654 set_flags (FLAGBIT_O|FLAGBIT_S, ma); 1655 #ifdef CYCLE_ACCURATE 1656 switch (opcode->size) 1657 { 1658 case RX_Long: 1659 cycles (6 + 4 * tx); 1660 break; 1661 case RX_Word: 1662 cycles (6 + 5 * (tx / 2) + 4 * (tx % 2)); 1663 break; 1664 case RX_Byte: 1665 cycles (6 + 7 * (tx / 4) + 4 * (tx % 4)); 1666 break; 1667 default: 1668 abort (); 1669 } 1670 #endif 1671 break; 1672 1673 case RXO_rolc: 1674 v = GD (); 1675 ma = v & 0x80000000UL; 1676 v <<= 1; 1677 v |= carry; 1678 set_szc (v, 4, ma); 1679 PD (v); 1680 E1; 1681 break; 1682 1683 case RXO_rorc: 1684 uma = GD (); 1685 mb = uma & 1; 1686 uma >>= 1; 1687 uma |= (carry ? 0x80000000UL : 0); 1688 set_szc (uma, 4, mb); 1689 PD (uma); 1690 E1; 1691 break; 1692 1693 case RXO_rotl: 1694 mb = GS (); 1695 uma = GD (); 1696 if (mb) 1697 { 1698 uma = (uma << mb) | (uma >> (32-mb)); 1699 mb = uma & 1; 1700 } 1701 set_szc (uma, 4, mb); 1702 PD (uma); 1703 E1; 1704 break; 1705 1706 case RXO_rotr: 1707 mb = GS (); 1708 uma = GD (); 1709 if (mb) 1710 { 1711 uma = (uma >> mb) | (uma << (32-mb)); 1712 mb = uma & 0x80000000; 1713 } 1714 set_szc (uma, 4, mb); 1715 PD (uma); 1716 E1; 1717 break; 1718 1719 case RXO_round: 1720 ma = GS (); 1721 FPCLEAR (); 1722 mb = rxfp_ftoi (ma, regs.r_fpsw); 1723 FPCHECK (); 1724 PD (mb); 1725 tprintf("(int) %g = %d\n", int2float(ma), mb); 1726 set_sz (mb, 4); 1727 E (2); 1728 break; 1729 1730 case RXO_rts: 1731 { 1732 #ifdef CYCLE_ACCURATE 1733 int cyc = 5; 1734 #endif 1735 regs.r_pc = poppc (); 1736 #ifdef CYCLE_ACCURATE 1737 /* Note: specs say 5, chip says 3. */ 1738 if (regs.fast_return && regs.link_register == regs.r_pc) 1739 { 1740 #ifdef CYCLE_STATS 1741 fast_returns ++; 1742 #endif 1743 tprintf("fast return bonus\n"); 1744 cyc -= 2; 1745 } 1746 cycles (cyc); 1747 regs.fast_return = 0; 1748 branch_alignment_penalty = 1; 1749 #endif 1750 } 1751 break; 1752 1753 case RXO_rtsd: 1754 if (opcode->op[2].type == RX_Operand_Register) 1755 { 1756 int i; 1757 /* RTSD cannot pop R0 (sp). */ 1758 put_reg (0, get_reg (0) + GS() - (opcode->op[0].reg-opcode->op[2].reg+1)*4); 1759 if (opcode->op[2].reg == 0) 1760 EXCEPTION (EX_UNDEFINED); 1761 #ifdef CYCLE_ACCURATE 1762 tx = opcode->op[0].reg - opcode->op[2].reg + 1; 1763 #endif 1764 for (i = opcode->op[2].reg; i <= opcode->op[0].reg; i ++) 1765 { 1766 RLD (i); 1767 put_reg (i, pop ()); 1768 } 1769 } 1770 else 1771 { 1772 #ifdef CYCLE_ACCURATE 1773 tx = 0; 1774 #endif 1775 put_reg (0, get_reg (0) + GS()); 1776 } 1777 put_reg (pc, poppc()); 1778 #ifdef CYCLE_ACCURATE 1779 if (regs.fast_return && regs.link_register == regs.r_pc) 1780 { 1781 tprintf("fast return bonus\n"); 1782 #ifdef CYCLE_STATS 1783 fast_returns ++; 1784 #endif 1785 cycles (tx < 3 ? 3 : tx + 1); 1786 } 1787 else 1788 { 1789 cycles (tx < 5 ? 5 : tx + 1); 1790 } 1791 regs.fast_return = 0; 1792 branch_alignment_penalty = 1; 1793 #endif 1794 break; 1795 1796 case RXO_sat: 1797 if (FLAG_O && FLAG_S) 1798 PD (0x7fffffffUL); 1799 else if (FLAG_O && ! FLAG_S) 1800 PD (0x80000000UL); 1801 E1; 1802 break; 1803 1804 case RXO_satr: 1805 if (FLAG_O && ! FLAG_S) 1806 { 1807 put_reg (6, 0x0); 1808 put_reg (5, 0x7fffffff); 1809 put_reg (4, 0xffffffff); 1810 } 1811 else if (FLAG_O && FLAG_S) 1812 { 1813 put_reg (6, 0xffffffff); 1814 put_reg (5, 0x80000000); 1815 put_reg (4, 0x0); 1816 } 1817 E1; 1818 break; 1819 1820 case RXO_sbb: 1821 MATH_OP (-, ! carry); 1822 break; 1823 1824 case RXO_sccnd: 1825 if (GS()) 1826 PD (1); 1827 else 1828 PD (0); 1829 E1; 1830 break; 1831 1832 case RXO_scmpu: 1833 #ifdef CYCLE_ACCURATE 1834 tx = regs.r[3]; 1835 #endif 1836 while (regs.r[3] != 0) 1837 { 1838 uma = mem_get_qi (regs.r[1] ++); 1839 umb = mem_get_qi (regs.r[2] ++); 1840 regs.r[3] --; 1841 if (uma != umb || uma == 0) 1842 break; 1843 } 1844 if (uma == umb) 1845 set_zc (1, 1); 1846 else 1847 set_zc (0, ((int)uma - (int)umb) >= 0); 1848 cycles (2 + 4 * (tx / 4) + 4 * (tx % 4)); 1849 break; 1850 1851 case RXO_setpsw: 1852 v = 1 << opcode->op[0].reg; 1853 if (FLAG_PM 1854 && (v == FLAGBIT_I 1855 || v == FLAGBIT_U)) 1856 break; 1857 regs.r_psw |= v; 1858 cycles (1); 1859 break; 1860 1861 case RXO_smovb: 1862 RL (3); 1863 #ifdef CYCLE_ACCURATE 1864 tx = regs.r[3]; 1865 #endif 1866 while (regs.r[3]) 1867 { 1868 uma = mem_get_qi (regs.r[2] --); 1869 mem_put_qi (regs.r[1]--, uma); 1870 regs.r[3] --; 1871 } 1872 #ifdef CYCLE_ACCURATE 1873 if (tx > 3) 1874 cycles (6 + 3 * (tx / 4) + 3 * (tx % 4)); 1875 else 1876 cycles (2 + 3 * (tx % 4)); 1877 #endif 1878 break; 1879 1880 case RXO_smovf: 1881 RL (3); 1882 #ifdef CYCLE_ACCURATE 1883 tx = regs.r[3]; 1884 #endif 1885 while (regs.r[3]) 1886 { 1887 uma = mem_get_qi (regs.r[2] ++); 1888 mem_put_qi (regs.r[1]++, uma); 1889 regs.r[3] --; 1890 } 1891 cycles (2 + 3 * (int)(tx / 4) + 3 * (tx % 4)); 1892 break; 1893 1894 case RXO_smovu: 1895 #ifdef CYCLE_ACCURATE 1896 tx = regs.r[3]; 1897 #endif 1898 while (regs.r[3] != 0) 1899 { 1900 uma = mem_get_qi (regs.r[2] ++); 1901 mem_put_qi (regs.r[1]++, uma); 1902 regs.r[3] --; 1903 if (uma == 0) 1904 break; 1905 } 1906 cycles (2 + 3 * (int)(tx / 4) + 3 * (tx % 4)); 1907 break; 1908 1909 case RXO_shar: /* d = ma >> mb */ 1910 SHIFT_OP (sll, int, mb, >>=, 1); 1911 E (1); 1912 break; 1913 1914 case RXO_shll: /* d = ma << mb */ 1915 SHIFT_OP (ll, int, mb, <<=, 0x80000000UL); 1916 E (1); 1917 break; 1918 1919 case RXO_shlr: /* d = ma >> mb */ 1920 SHIFT_OP (ll, unsigned int, mb, >>=, 1); 1921 E (1); 1922 break; 1923 1924 case RXO_sstr: 1925 RL (3); 1926 #ifdef CYCLE_ACCURATE 1927 tx = regs.r[3]; 1928 #endif 1929 switch (opcode->size) 1930 { 1931 case RX_Long: 1932 while (regs.r[3] != 0) 1933 { 1934 mem_put_si (regs.r[1], regs.r[2]); 1935 regs.r[1] += 4; 1936 regs.r[3] --; 1937 } 1938 cycles (2 + tx); 1939 break; 1940 case RX_Word: 1941 while (regs.r[3] != 0) 1942 { 1943 mem_put_hi (regs.r[1], regs.r[2]); 1944 regs.r[1] += 2; 1945 regs.r[3] --; 1946 } 1947 cycles (2 + (int)(tx / 2) + tx % 2); 1948 break; 1949 case RX_Byte: 1950 while (regs.r[3] != 0) 1951 { 1952 mem_put_qi (regs.r[1], regs.r[2]); 1953 regs.r[1] ++; 1954 regs.r[3] --; 1955 } 1956 cycles (2 + (int)(tx / 4) + tx % 4); 1957 break; 1958 default: 1959 abort (); 1960 } 1961 break; 1962 1963 case RXO_stcc: 1964 if (GS2()) 1965 PD (GS ()); 1966 E1; 1967 break; 1968 1969 case RXO_stop: 1970 PRIVILEDGED (); 1971 regs.r_psw |= FLAGBIT_I; 1972 DO_RETURN (RX_MAKE_STOPPED(0)); 1973 1974 case RXO_sub: 1975 MATH_OP (-, 0); 1976 break; 1977 1978 case RXO_suntil: 1979 RL(3); 1980 #ifdef CYCLE_ACCURATE 1981 tx = 0; 1982 #endif 1983 if (regs.r[3] == 0) 1984 { 1985 cycles (3); 1986 break; 1987 } 1988 switch (opcode->size) 1989 { 1990 case RX_Long: 1991 uma = get_reg (2); 1992 while (regs.r[3] != 0) 1993 { 1994 regs.r[3] --; 1995 umb = mem_get_si (get_reg (1)); 1996 regs.r[1] += 4; 1997 #ifdef CYCLE_ACCURATE 1998 tx ++; 1999 #endif 2000 if (umb == uma) 2001 break; 2002 } 2003 #ifdef CYCLE_ACCURATE 2004 cycles (3 + 3 * tx); 2005 #endif 2006 break; 2007 case RX_Word: 2008 uma = get_reg (2) & 0xffff; 2009 while (regs.r[3] != 0) 2010 { 2011 regs.r[3] --; 2012 umb = mem_get_hi (get_reg (1)); 2013 regs.r[1] += 2; 2014 #ifdef CYCLE_ACCURATE 2015 tx ++; 2016 #endif 2017 if (umb == uma) 2018 break; 2019 } 2020 #ifdef CYCLE_ACCURATE 2021 cycles (3 + 3 * (tx / 2) + 3 * (tx % 2)); 2022 #endif 2023 break; 2024 case RX_Byte: 2025 uma = get_reg (2) & 0xff; 2026 while (regs.r[3] != 0) 2027 { 2028 regs.r[3] --; 2029 umb = mem_get_qi (regs.r[1]); 2030 regs.r[1] += 1; 2031 #ifdef CYCLE_ACCURATE 2032 tx ++; 2033 #endif 2034 if (umb == uma) 2035 break; 2036 } 2037 #ifdef CYCLE_ACCURATE 2038 cycles (3 + 3 * (tx / 4) + 3 * (tx % 4)); 2039 #endif 2040 break; 2041 default: 2042 abort(); 2043 } 2044 if (uma == umb) 2045 set_zc (1, 1); 2046 else 2047 set_zc (0, ((int)uma - (int)umb) >= 0); 2048 break; 2049 2050 case RXO_swhile: 2051 RL(3); 2052 #ifdef CYCLE_ACCURATE 2053 tx = 0; 2054 #endif 2055 if (regs.r[3] == 0) 2056 break; 2057 switch (opcode->size) 2058 { 2059 case RX_Long: 2060 uma = get_reg (2); 2061 while (regs.r[3] != 0) 2062 { 2063 regs.r[3] --; 2064 umb = mem_get_si (get_reg (1)); 2065 regs.r[1] += 4; 2066 #ifdef CYCLE_ACCURATE 2067 tx ++; 2068 #endif 2069 if (umb != uma) 2070 break; 2071 } 2072 #ifdef CYCLE_ACCURATE 2073 cycles (3 + 3 * tx); 2074 #endif 2075 break; 2076 case RX_Word: 2077 uma = get_reg (2) & 0xffff; 2078 while (regs.r[3] != 0) 2079 { 2080 regs.r[3] --; 2081 umb = mem_get_hi (get_reg (1)); 2082 regs.r[1] += 2; 2083 #ifdef CYCLE_ACCURATE 2084 tx ++; 2085 #endif 2086 if (umb != uma) 2087 break; 2088 } 2089 #ifdef CYCLE_ACCURATE 2090 cycles (3 + 3 * (tx / 2) + 3 * (tx % 2)); 2091 #endif 2092 break; 2093 case RX_Byte: 2094 uma = get_reg (2) & 0xff; 2095 while (regs.r[3] != 0) 2096 { 2097 regs.r[3] --; 2098 umb = mem_get_qi (regs.r[1]); 2099 regs.r[1] += 1; 2100 #ifdef CYCLE_ACCURATE 2101 tx ++; 2102 #endif 2103 if (umb != uma) 2104 break; 2105 } 2106 #ifdef CYCLE_ACCURATE 2107 cycles (3 + 3 * (tx / 4) + 3 * (tx % 4)); 2108 #endif 2109 break; 2110 default: 2111 abort(); 2112 } 2113 if (uma == umb) 2114 set_zc (1, 1); 2115 else 2116 set_zc (0, ((int)uma - (int)umb) >= 0); 2117 break; 2118 2119 case RXO_wait: 2120 PRIVILEDGED (); 2121 regs.r_psw |= FLAGBIT_I; 2122 DO_RETURN (RX_MAKE_STOPPED(0)); 2123 2124 case RXO_xchg: 2125 #ifdef CYCLE_ACCURATE 2126 regs.m2m = 0; 2127 #endif 2128 v = GS (); /* This is the memory operand, if any. */ 2129 PS (GD ()); /* and this may change the address register. */ 2130 PD (v); 2131 E2; 2132 #ifdef CYCLE_ACCURATE 2133 /* all M cycles happen during xchg's cycles. */ 2134 memory_dest = 0; 2135 memory_source = 0; 2136 #endif 2137 break; 2138 2139 case RXO_xor: 2140 LOGIC_OP (^); 2141 break; 2142 2143 default: 2144 EXCEPTION (EX_UNDEFINED); 2145 } 2146 2147 #ifdef CYCLE_ACCURATE 2148 regs.m2m = 0; 2149 if (memory_source) 2150 regs.m2m |= M2M_SRC; 2151 if (memory_dest) 2152 regs.m2m |= M2M_DST; 2153 2154 regs.rt = new_rt; 2155 new_rt = -1; 2156 #endif 2157 2158 #ifdef CYCLE_STATS 2159 if (prev_cycle_count == regs.cycle_count) 2160 { 2161 printf("Cycle count not updated! id %s\n", id_names[opcode->id]); 2162 abort (); 2163 } 2164 #endif 2165 2166 #ifdef CYCLE_STATS 2167 if (running_benchmark) 2168 { 2169 int omap = op_lookup (opcode->op[0].type, opcode->op[1].type, opcode->op[2].type); 2170 2171 2172 cycles_per_id[opcode->id][omap] += regs.cycle_count - prev_cycle_count; 2173 times_per_id[opcode->id][omap] ++; 2174 2175 times_per_pair[prev_opcode_id][po0][opcode->id][omap] ++; 2176 2177 prev_opcode_id = opcode->id; 2178 po0 = omap; 2179 } 2180 #endif 2181 2182 return RX_MAKE_STEPPED (); 2183 } 2184 2185 #ifdef CYCLE_STATS 2186 void 2187 reset_pipeline_stats (void) 2188 { 2189 memset (cycles_per_id, 0, sizeof(cycles_per_id)); 2190 memset (times_per_id, 0, sizeof(times_per_id)); 2191 memory_stalls = 0; 2192 register_stalls = 0; 2193 branch_stalls = 0; 2194 branch_alignment_stalls = 0; 2195 fast_returns = 0; 2196 memset (times_per_pair, 0, sizeof(times_per_pair)); 2197 running_benchmark = 1; 2198 2199 benchmark_start_cycle = regs.cycle_count; 2200 } 2201 2202 void 2203 halt_pipeline_stats (void) 2204 { 2205 running_benchmark = 0; 2206 benchmark_end_cycle = regs.cycle_count; 2207 } 2208 #endif 2209 2210 void 2211 pipeline_stats (void) 2212 { 2213 #ifdef CYCLE_STATS 2214 int i, o1; 2215 int p, p1; 2216 #endif 2217 2218 #ifdef CYCLE_ACCURATE 2219 if (verbose == 1) 2220 { 2221 printf ("cycles: %llu\n", regs.cycle_count); 2222 return; 2223 } 2224 2225 printf ("cycles: %13s\n", comma (regs.cycle_count)); 2226 #endif 2227 2228 #ifdef CYCLE_STATS 2229 if (benchmark_start_cycle) 2230 printf ("bmark: %13s\n", comma (benchmark_end_cycle - benchmark_start_cycle)); 2231 2232 printf("\n"); 2233 for (i = 0; i < N_RXO; i++) 2234 for (o1 = 0; o1 < N_MAP; o1 ++) 2235 if (times_per_id[i][o1]) 2236 printf("%13s %13s %7.2f %s %s\n", 2237 comma (cycles_per_id[i][o1]), 2238 comma (times_per_id[i][o1]), 2239 (double)cycles_per_id[i][o1] / times_per_id[i][o1], 2240 op_cache_string(o1), 2241 id_names[i]+4); 2242 2243 printf("\n"); 2244 for (p = 0; p < N_RXO; p ++) 2245 for (p1 = 0; p1 < N_MAP; p1 ++) 2246 for (i = 0; i < N_RXO; i ++) 2247 for (o1 = 0; o1 < N_MAP; o1 ++) 2248 if (times_per_pair[p][p1][i][o1]) 2249 { 2250 printf("%13s %s %-9s -> %s %s\n", 2251 comma (times_per_pair[p][p1][i][o1]), 2252 op_cache_string(p1), 2253 id_names[p]+4, 2254 op_cache_string(o1), 2255 id_names[i]+4); 2256 } 2257 2258 printf("\n"); 2259 printf("%13s memory stalls\n", comma (memory_stalls)); 2260 printf("%13s register stalls\n", comma (register_stalls)); 2261 printf("%13s branches taken (non-return)\n", comma (branch_stalls)); 2262 printf("%13s branch alignment stalls\n", comma (branch_alignment_stalls)); 2263 printf("%13s fast returns\n", comma (fast_returns)); 2264 #endif 2265 } 2266
Indexes created Thu Apr 02 00:23:07 UTC 2026