exec.c revision 1.1.1.5
1 /* This file is part of SIS (SPARC instruction simulator) 2 3 Copyright (C) 1995-2016 Free Software Foundation, Inc. 4 Contributed by Jiri Gaisler, European Space Agency 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18 19 #include "config.h" 20 #include "sis.h" 21 #include <math.h> 22 #include <stdio.h> 23 24 extern int32 sis_verbose, sparclite; 25 int ext_irl = 0; 26 27 /* Load/store interlock delay */ 28 #define FLSTHOLD 1 29 30 /* Load delay (delete if unwanted - speeds up simulation) */ 31 #define LOAD_DEL 1 32 33 #define T_LD 2 34 #define T_LDD 3 35 #define T_ST 3 36 #define T_STD 4 37 #define T_LDST 4 38 #define T_JMPL 2 39 #define T_RETT 2 40 41 #define FSR_QNE 0x2000 42 #define FP_EXE_MODE 0 43 #define FP_EXC_PE 1 44 #define FP_EXC_MODE 2 45 46 #define FBA 8 47 #define FBN 0 48 #define FBNE 1 49 #define FBLG 2 50 #define FBUL 3 51 #define FBL 4 52 #define FBUG 5 53 #define FBG 6 54 #define FBU 7 55 #define FBA 8 56 #define FBE 9 57 #define FBUE 10 58 #define FBGE 11 59 #define FBUGE 12 60 #define FBLE 13 61 #define FBULE 14 62 #define FBO 15 63 64 #define FCC_E 0 65 #define FCC_L 1 66 #define FCC_G 2 67 #define FCC_U 3 68 69 #define PSR_ET 0x20 70 #define PSR_EF 0x1000 71 #define PSR_PS 0x40 72 #define PSR_S 0x80 73 #define PSR_N 0x0800000 74 #define PSR_Z 0x0400000 75 #define PSR_V 0x0200000 76 #define PSR_C 0x0100000 77 #define PSR_CC 0x0F00000 78 #define PSR_CWP 0x7 79 #define PSR_PIL 0x0f00 80 81 #define ICC_N (icc >> 3) 82 #define ICC_Z (icc >> 2) 83 #define ICC_V (icc >> 1) 84 #define ICC_C (icc) 85 86 #define FP_PRES (sregs->fpu_pres) 87 88 #define TRAP_IEXC 1 89 #define TRAP_UNIMP 2 90 #define TRAP_PRIVI 3 91 #define TRAP_FPDIS 4 92 #define TRAP_WOFL 5 93 #define TRAP_WUFL 6 94 #define TRAP_UNALI 7 95 #define TRAP_FPEXC 8 96 #define TRAP_DEXC 9 97 #define TRAP_TAG 10 98 #define TRAP_DIV0 0x2a 99 100 #define FSR_TT 0x1C000 101 #define FP_IEEE 0x04000 102 #define FP_UNIMP 0x0C000 103 #define FP_SEQ_ERR 0x10000 104 105 #define BICC_BN 0 106 #define BICC_BE 1 107 #define BICC_BLE 2 108 #define BICC_BL 3 109 #define BICC_BLEU 4 110 #define BICC_BCS 5 111 #define BICC_NEG 6 112 #define BICC_BVS 7 113 #define BICC_BA 8 114 #define BICC_BNE 9 115 #define BICC_BG 10 116 #define BICC_BGE 11 117 #define BICC_BGU 12 118 #define BICC_BCC 13 119 #define BICC_POS 14 120 #define BICC_BVC 15 121 122 #define INST_SIMM13 0x1fff 123 #define INST_RS2 0x1f 124 #define INST_I 0x2000 125 #define ADD 0x00 126 #define ADDCC 0x10 127 #define ADDX 0x08 128 #define ADDXCC 0x18 129 #define TADDCC 0x20 130 #define TSUBCC 0x21 131 #define TADDCCTV 0x22 132 #define TSUBCCTV 0x23 133 #define IAND 0x01 134 #define IANDCC 0x11 135 #define IANDN 0x05 136 #define IANDNCC 0x15 137 #define MULScc 0x24 138 #define DIVScc 0x1D 139 #define SMUL 0x0B 140 #define SMULCC 0x1B 141 #define UMUL 0x0A 142 #define UMULCC 0x1A 143 #define SDIV 0x0F 144 #define SDIVCC 0x1F 145 #define UDIV 0x0E 146 #define UDIVCC 0x1E 147 #define IOR 0x02 148 #define IORCC 0x12 149 #define IORN 0x06 150 #define IORNCC 0x16 151 #define SLL 0x25 152 #define SRA 0x27 153 #define SRL 0x26 154 #define SUB 0x04 155 #define SUBCC 0x14 156 #define SUBX 0x0C 157 #define SUBXCC 0x1C 158 #define IXNOR 0x07 159 #define IXNORCC 0x17 160 #define IXOR 0x03 161 #define IXORCC 0x13 162 #define SETHI 0x04 163 #define BICC 0x02 164 #define FPBCC 0x06 165 #define RDY 0x28 166 #define RDPSR 0x29 167 #define RDWIM 0x2A 168 #define RDTBR 0x2B 169 #define SCAN 0x2C 170 #define WRY 0x30 171 #define WRPSR 0x31 172 #define WRWIM 0x32 173 #define WRTBR 0x33 174 #define JMPL 0x38 175 #define RETT 0x39 176 #define TICC 0x3A 177 #define SAVE 0x3C 178 #define RESTORE 0x3D 179 #define LDD 0x03 180 #define LDDA 0x13 181 #define LD 0x00 182 #define LDA 0x10 183 #define LDF 0x20 184 #define LDDF 0x23 185 #define LDSTUB 0x0D 186 #define LDSTUBA 0x1D 187 #define LDUB 0x01 188 #define LDUBA 0x11 189 #define LDSB 0x09 190 #define LDSBA 0x19 191 #define LDUH 0x02 192 #define LDUHA 0x12 193 #define LDSH 0x0A 194 #define LDSHA 0x1A 195 #define LDFSR 0x21 196 #define ST 0x04 197 #define STA 0x14 198 #define STB 0x05 199 #define STBA 0x15 200 #define STD 0x07 201 #define STDA 0x17 202 #define STF 0x24 203 #define STDFQ 0x26 204 #define STDF 0x27 205 #define STFSR 0x25 206 #define STH 0x06 207 #define STHA 0x16 208 #define SWAP 0x0F 209 #define SWAPA 0x1F 210 #define FLUSH 0x3B 211 212 #define SIGN_BIT 0x80000000 213 214 /* # of cycles overhead when a trap is taken */ 215 #define TRAP_C 3 216 217 /* Forward declarations */ 218 219 static uint32 sub_cc (uint32 psr, int32 operand1, int32 operand2, 220 int32 result); 221 static uint32 add_cc (uint32 psr, int32 operand1, int32 operand2, 222 int32 result); 223 static void log_cc (int32 result, struct pstate *sregs); 224 static int fpexec (uint32 op3, uint32 rd, uint32 rs1, uint32 rs2, 225 struct pstate *sregs); 226 static int chk_asi (struct pstate *sregs, uint32 *asi, uint32 op3); 227 228 229 extern struct estate ebase; 230 extern int32 nfp,ift; 231 232 #ifdef ERRINJ 233 extern uint32 errtt, errftt; 234 #endif 235 236 static uint32 237 sub_cc(psr, operand1, operand2, result) 238 uint32 psr; 239 int32 operand1; 240 int32 operand2; 241 int32 result; 242 { 243 psr = ((psr & ~PSR_N) | ((result >> 8) & PSR_N)); 244 if (result) 245 psr &= ~PSR_Z; 246 else 247 psr |= PSR_Z; 248 psr = (psr & ~PSR_V) | ((((operand1 & ~operand2 & ~result) | 249 (~operand1 & operand2 & result)) >> 10) & PSR_V); 250 psr = (psr & ~PSR_C) | ((((~operand1 & operand2) | 251 ((~operand1 | operand2) & result)) >> 11) & PSR_C); 252 return psr; 253 } 254 255 uint32 256 add_cc(psr, operand1, operand2, result) 257 uint32 psr; 258 int32 operand1; 259 int32 operand2; 260 int32 result; 261 { 262 psr = ((psr & ~PSR_N) | ((result >> 8) & PSR_N)); 263 if (result) 264 psr &= ~PSR_Z; 265 else 266 psr |= PSR_Z; 267 psr = (psr & ~PSR_V) | ((((operand1 & operand2 & ~result) | 268 (~operand1 & ~operand2 & result)) >> 10) & PSR_V); 269 psr = (psr & ~PSR_C) | ((((operand1 & operand2) | 270 ((operand1 | operand2) & ~result)) >> 11) & PSR_C); 271 return psr; 272 } 273 274 static void 275 log_cc(result, sregs) 276 int32 result; 277 struct pstate *sregs; 278 { 279 sregs->psr &= ~(PSR_CC); /* Zero CC bits */ 280 sregs->psr = (sregs->psr | ((result >> 8) & PSR_N)); 281 if (result == 0) 282 sregs->psr |= PSR_Z; 283 } 284 285 /* Add two unsigned 32-bit integers, and calculate the carry out. */ 286 287 static uint32 288 add32 (uint32 n1, uint32 n2, int *carry) 289 { 290 uint32 result = n1 + n2; 291 292 *carry = result < n1 || result < n2; 293 return result; 294 } 295 296 /* Multiply two 32-bit integers. */ 297 298 static void 299 mul64 (uint32 n1, uint32 n2, uint32 *result_hi, uint32 *result_lo, int msigned) 300 { 301 uint32 lo, mid1, mid2, hi, reg_lo, reg_hi; 302 int carry; 303 int sign = 0; 304 305 /* If this is a signed multiply, calculate the sign of the result 306 and make the operands positive. */ 307 if (msigned) 308 { 309 sign = (n1 ^ n2) & SIGN_BIT; 310 if (n1 & SIGN_BIT) 311 n1 = -n1; 312 if (n2 & SIGN_BIT) 313 n2 = -n2; 314 315 } 316 317 /* We can split the 32x32 into four 16x16 operations. This ensures 318 that we do not lose precision on 32bit only hosts: */ 319 lo = ((n1 & 0xFFFF) * (n2 & 0xFFFF)); 320 mid1 = ((n1 & 0xFFFF) * ((n2 >> 16) & 0xFFFF)); 321 mid2 = (((n1 >> 16) & 0xFFFF) * (n2 & 0xFFFF)); 322 hi = (((n1 >> 16) & 0xFFFF) * ((n2 >> 16) & 0xFFFF)); 323 324 /* We now need to add all of these results together, taking care 325 to propogate the carries from the additions: */ 326 reg_lo = add32 (lo, (mid1 << 16), &carry); 327 reg_hi = carry; 328 reg_lo = add32 (reg_lo, (mid2 << 16), &carry); 329 reg_hi += (carry + ((mid1 >> 16) & 0xFFFF) + ((mid2 >> 16) & 0xFFFF) + hi); 330 331 /* Negate result if necessary. */ 332 if (sign) 333 { 334 reg_hi = ~ reg_hi; 335 reg_lo = - reg_lo; 336 if (reg_lo == 0) 337 reg_hi++; 338 } 339 340 *result_lo = reg_lo; 341 *result_hi = reg_hi; 342 } 343 344 345 /* Divide a 64-bit integer by a 32-bit integer. We cheat and assume 346 that the host compiler supports long long operations. */ 347 348 static void 349 div64 (uint32 n1_hi, uint32 n1_low, uint32 n2, uint32 *result, int msigned) 350 { 351 uint64 n1; 352 353 n1 = ((uint64) n1_hi) << 32; 354 n1 |= ((uint64) n1_low) & 0xffffffff; 355 356 if (msigned) 357 { 358 int64 n1_s = (int64) n1; 359 int32 n2_s = (int32) n2; 360 n1_s = n1_s / n2_s; 361 n1 = (uint64) n1_s; 362 } 363 else 364 n1 = n1 / n2; 365 366 *result = (uint32) (n1 & 0xffffffff); 367 } 368 369 370 static int 371 extract_short (uint32 data, uint32 address) 372 { 373 return ((data >> ((2 - (address & 2)) * 8)) & 0xffff); 374 } 375 376 static int 377 extract_short_signed (uint32 data, uint32 address) 378 { 379 uint32 tmp = ((data >> ((2 - (address & 2)) * 8)) & 0xffff); 380 if (tmp & 0x8000) 381 tmp |= 0xffff0000; 382 return tmp; 383 } 384 385 static int 386 extract_byte (uint32 data, uint32 address) 387 { 388 return ((data >> ((3 - (address & 3)) * 8)) & 0xff); 389 } 390 391 static int 392 extract_byte_signed (uint32 data, uint32 address) 393 { 394 uint32 tmp = ((data >> ((3 - (address & 3)) * 8)) & 0xff); 395 if (tmp & 0x80) 396 tmp |= 0xffffff00; 397 return tmp; 398 } 399 400 int 401 dispatch_instruction(sregs) 402 struct pstate *sregs; 403 { 404 405 uint32 cwp, op, op2, op3, asi, rd, cond, rs1, 406 rs2; 407 uint32 ldep, icc; 408 int32 operand1, operand2, *rdd, result, eicc, 409 new_cwp; 410 int32 pc, npc, data, address, ws, mexc, fcc; 411 int32 ddata[2]; 412 413 sregs->ninst++; 414 cwp = ((sregs->psr & PSR_CWP) << 4); 415 op = sregs->inst >> 30; 416 pc = sregs->npc; 417 npc = sregs->npc + 4; 418 op3 = rd = rs1 = operand2 = eicc = 0; 419 rdd = 0; 420 if (op & 2) { 421 422 op3 = (sregs->inst >> 19) & 0x3f; 423 rs1 = (sregs->inst >> 14) & 0x1f; 424 rd = (sregs->inst >> 25) & 0x1f; 425 426 #ifdef LOAD_DEL 427 428 /* Check if load dependecy is possible */ 429 if (ebase.simtime <= sregs->ildtime) 430 ldep = (((op3 & 0x38) != 0x28) && ((op3 & 0x3e) != 0x34) && (sregs->ildreg != 0)); 431 else 432 ldep = 0; 433 if (sregs->inst & INST_I) { 434 if (ldep && (sregs->ildreg == rs1)) 435 sregs->hold++; 436 operand2 = sregs->inst; 437 operand2 = ((operand2 << 19) >> 19); /* sign extend */ 438 } else { 439 rs2 = sregs->inst & INST_RS2; 440 if (rs2 > 7) 441 operand2 = sregs->r[(cwp + rs2) & 0x7f]; 442 else 443 operand2 = sregs->g[rs2]; 444 if (ldep && ((sregs->ildreg == rs1) || (sregs->ildreg == rs2))) 445 sregs->hold++; 446 } 447 #else 448 if (sregs->inst & INST_I) { 449 operand2 = sregs->inst; 450 operand2 = ((operand2 << 19) >> 19); /* sign extend */ 451 } else { 452 rs2 = sregs->inst & INST_RS2; 453 if (rs2 > 7) 454 operand2 = sregs->r[(cwp + rs2) & 0x7f]; 455 else 456 operand2 = sregs->g[rs2]; 457 } 458 #endif 459 460 if (rd > 7) 461 rdd = &(sregs->r[(cwp + rd) & 0x7f]); 462 else 463 rdd = &(sregs->g[rd]); 464 if (rs1 > 7) 465 rs1 = sregs->r[(cwp + rs1) & 0x7f]; 466 else 467 rs1 = sregs->g[rs1]; 468 } 469 switch (op) { 470 case 0: 471 op2 = (sregs->inst >> 22) & 0x7; 472 switch (op2) { 473 case SETHI: 474 rd = (sregs->inst >> 25) & 0x1f; 475 if (rd > 7) 476 rdd = &(sregs->r[(cwp + rd) & 0x7f]); 477 else 478 rdd = &(sregs->g[rd]); 479 *rdd = sregs->inst << 10; 480 break; 481 case BICC: 482 #ifdef STAT 483 sregs->nbranch++; 484 #endif 485 icc = sregs->psr >> 20; 486 cond = ((sregs->inst >> 25) & 0x0f); 487 switch (cond) { 488 case BICC_BN: 489 eicc = 0; 490 break; 491 case BICC_BE: 492 eicc = ICC_Z; 493 break; 494 case BICC_BLE: 495 eicc = ICC_Z | (ICC_N ^ ICC_V); 496 break; 497 case BICC_BL: 498 eicc = (ICC_N ^ ICC_V); 499 break; 500 case BICC_BLEU: 501 eicc = ICC_C | ICC_Z; 502 break; 503 case BICC_BCS: 504 eicc = ICC_C; 505 break; 506 case BICC_NEG: 507 eicc = ICC_N; 508 break; 509 case BICC_BVS: 510 eicc = ICC_V; 511 break; 512 case BICC_BA: 513 eicc = 1; 514 if (sregs->inst & 0x20000000) 515 sregs->annul = 1; 516 break; 517 case BICC_BNE: 518 eicc = ~(ICC_Z); 519 break; 520 case BICC_BG: 521 eicc = ~(ICC_Z | (ICC_N ^ ICC_V)); 522 break; 523 case BICC_BGE: 524 eicc = ~(ICC_N ^ ICC_V); 525 break; 526 case BICC_BGU: 527 eicc = ~(ICC_C | ICC_Z); 528 break; 529 case BICC_BCC: 530 eicc = ~(ICC_C); 531 break; 532 case BICC_POS: 533 eicc = ~(ICC_N); 534 break; 535 case BICC_BVC: 536 eicc = ~(ICC_V); 537 break; 538 } 539 if (eicc & 1) { 540 operand1 = sregs->inst; 541 operand1 = ((operand1 << 10) >> 8); /* sign extend */ 542 npc = sregs->pc + operand1; 543 } else { 544 if (sregs->inst & 0x20000000) 545 sregs->annul = 1; 546 } 547 break; 548 case FPBCC: 549 #ifdef STAT 550 sregs->nbranch++; 551 #endif 552 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 553 sregs->trap = TRAP_FPDIS; 554 break; 555 } 556 if (ebase.simtime < sregs->ftime) { 557 sregs->ftime = ebase.simtime + sregs->hold; 558 } 559 cond = ((sregs->inst >> 25) & 0x0f); 560 fcc = (sregs->fsr >> 10) & 0x3; 561 switch (cond) { 562 case FBN: 563 eicc = 0; 564 break; 565 case FBNE: 566 eicc = (fcc != FCC_E); 567 break; 568 case FBLG: 569 eicc = (fcc == FCC_L) || (fcc == FCC_G); 570 break; 571 case FBUL: 572 eicc = (fcc == FCC_L) || (fcc == FCC_U); 573 break; 574 case FBL: 575 eicc = (fcc == FCC_L); 576 break; 577 case FBUG: 578 eicc = (fcc == FCC_G) || (fcc == FCC_U); 579 break; 580 case FBG: 581 eicc = (fcc == FCC_G); 582 break; 583 case FBU: 584 eicc = (fcc == FCC_U); 585 break; 586 case FBA: 587 eicc = 1; 588 if (sregs->inst & 0x20000000) 589 sregs->annul = 1; 590 break; 591 case FBE: 592 eicc = !(fcc != FCC_E); 593 break; 594 case FBUE: 595 eicc = !((fcc == FCC_L) || (fcc == FCC_G)); 596 break; 597 case FBGE: 598 eicc = !((fcc == FCC_L) || (fcc == FCC_U)); 599 break; 600 case FBUGE: 601 eicc = !(fcc == FCC_L); 602 break; 603 case FBLE: 604 eicc = !((fcc == FCC_G) || (fcc == FCC_U)); 605 break; 606 case FBULE: 607 eicc = !(fcc == FCC_G); 608 break; 609 case FBO: 610 eicc = !(fcc == FCC_U); 611 break; 612 } 613 if (eicc) { 614 operand1 = sregs->inst; 615 operand1 = ((operand1 << 10) >> 8); /* sign extend */ 616 npc = sregs->pc + operand1; 617 } else { 618 if (sregs->inst & 0x20000000) 619 sregs->annul = 1; 620 } 621 break; 622 623 default: 624 sregs->trap = TRAP_UNIMP; 625 break; 626 } 627 break; 628 case 1: /* CALL */ 629 #ifdef STAT 630 sregs->nbranch++; 631 #endif 632 sregs->r[(cwp + 15) & 0x7f] = sregs->pc; 633 npc = sregs->pc + (sregs->inst << 2); 634 break; 635 636 case 2: 637 if ((op3 >> 1) == 0x1a) { 638 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 639 sregs->trap = TRAP_FPDIS; 640 } else { 641 rs1 = (sregs->inst >> 14) & 0x1f; 642 rs2 = sregs->inst & 0x1f; 643 sregs->trap = fpexec(op3, rd, rs1, rs2, sregs); 644 } 645 } else { 646 647 switch (op3) { 648 case TICC: 649 icc = sregs->psr >> 20; 650 cond = ((sregs->inst >> 25) & 0x0f); 651 switch (cond) { 652 case BICC_BN: 653 eicc = 0; 654 break; 655 case BICC_BE: 656 eicc = ICC_Z; 657 break; 658 case BICC_BLE: 659 eicc = ICC_Z | (ICC_N ^ ICC_V); 660 break; 661 case BICC_BL: 662 eicc = (ICC_N ^ ICC_V); 663 break; 664 case BICC_BLEU: 665 eicc = ICC_C | ICC_Z; 666 break; 667 case BICC_BCS: 668 eicc = ICC_C; 669 break; 670 case BICC_NEG: 671 eicc = ICC_N; 672 break; 673 case BICC_BVS: 674 eicc = ICC_V; 675 break; 676 case BICC_BA: 677 eicc = 1; 678 break; 679 case BICC_BNE: 680 eicc = ~(ICC_Z); 681 break; 682 case BICC_BG: 683 eicc = ~(ICC_Z | (ICC_N ^ ICC_V)); 684 break; 685 case BICC_BGE: 686 eicc = ~(ICC_N ^ ICC_V); 687 break; 688 case BICC_BGU: 689 eicc = ~(ICC_C | ICC_Z); 690 break; 691 case BICC_BCC: 692 eicc = ~(ICC_C); 693 break; 694 case BICC_POS: 695 eicc = ~(ICC_N); 696 break; 697 case BICC_BVC: 698 eicc = ~(ICC_V); 699 break; 700 } 701 if (eicc & 1) { 702 sregs->trap = (0x80 | ((rs1 + operand2) & 0x7f)); 703 } 704 break; 705 706 case MULScc: 707 operand1 = 708 (((sregs->psr & PSR_V) ^ ((sregs->psr & PSR_N) >> 2)) 709 << 10) | (rs1 >> 1); 710 if ((sregs->y & 1) == 0) 711 operand2 = 0; 712 *rdd = operand1 + operand2; 713 sregs->y = (rs1 << 31) | (sregs->y >> 1); 714 sregs->psr = add_cc(sregs->psr, operand1, operand2, *rdd); 715 break; 716 case DIVScc: 717 { 718 int sign; 719 uint32 result, remainder; 720 int c0, y31; 721 722 if (!sparclite) { 723 sregs->trap = TRAP_UNIMP; 724 break; 725 } 726 727 sign = ((sregs->psr & PSR_V) != 0) ^ ((sregs->psr & PSR_N) != 0); 728 729 remainder = (sregs->y << 1) | (rs1 >> 31); 730 731 /* If true sign is positive, calculate remainder - divisor. 732 Otherwise, calculate remainder + divisor. */ 733 if (sign == 0) 734 operand2 = ~operand2 + 1; 735 result = remainder + operand2; 736 737 /* The SPARClite User's Manual is not clear on how 738 the "carry out" of the above ALU operation is to 739 be calculated. From trial and error tests 740 on the the chip itself, it appears that it is 741 a normal addition carry, and not a subtraction borrow, 742 even in cases where the divisor is subtracted 743 from the remainder. FIXME: get the true story 744 from Fujitsu. */ 745 c0 = result < (uint32) remainder 746 || result < (uint32) operand2; 747 748 if (result & 0x80000000) 749 sregs->psr |= PSR_N; 750 else 751 sregs->psr &= ~PSR_N; 752 753 y31 = (sregs->y & 0x80000000) == 0x80000000; 754 755 if (result == 0 && sign == y31) 756 sregs->psr |= PSR_Z; 757 else 758 sregs->psr &= ~PSR_Z; 759 760 sign = (sign && !y31) || (!c0 && (sign || !y31)); 761 762 if (sign ^ (result >> 31)) 763 sregs->psr |= PSR_V; 764 else 765 sregs->psr &= ~PSR_V; 766 767 if (!sign) 768 sregs->psr |= PSR_C; 769 else 770 sregs->psr &= ~PSR_C; 771 772 sregs->y = result; 773 774 if (rd != 0) 775 *rdd = (rs1 << 1) | !sign; 776 } 777 break; 778 case SMUL: 779 { 780 mul64 (rs1, operand2, &sregs->y, rdd, 1); 781 } 782 break; 783 case SMULCC: 784 { 785 uint32 result; 786 787 mul64 (rs1, operand2, &sregs->y, &result, 1); 788 789 if (result & 0x80000000) 790 sregs->psr |= PSR_N; 791 else 792 sregs->psr &= ~PSR_N; 793 794 if (result == 0) 795 sregs->psr |= PSR_Z; 796 else 797 sregs->psr &= ~PSR_Z; 798 799 *rdd = result; 800 } 801 break; 802 case UMUL: 803 { 804 mul64 (rs1, operand2, &sregs->y, rdd, 0); 805 } 806 break; 807 case UMULCC: 808 { 809 uint32 result; 810 811 mul64 (rs1, operand2, &sregs->y, &result, 0); 812 813 if (result & 0x80000000) 814 sregs->psr |= PSR_N; 815 else 816 sregs->psr &= ~PSR_N; 817 818 if (result == 0) 819 sregs->psr |= PSR_Z; 820 else 821 sregs->psr &= ~PSR_Z; 822 823 *rdd = result; 824 } 825 break; 826 case SDIV: 827 { 828 if (sparclite) { 829 sregs->trap = TRAP_UNIMP; 830 break; 831 } 832 833 if (operand2 == 0) { 834 sregs->trap = TRAP_DIV0; 835 break; 836 } 837 838 div64 (sregs->y, rs1, operand2, rdd, 1); 839 } 840 break; 841 case SDIVCC: 842 { 843 uint32 result; 844 845 if (sparclite) { 846 sregs->trap = TRAP_UNIMP; 847 break; 848 } 849 850 if (operand2 == 0) { 851 sregs->trap = TRAP_DIV0; 852 break; 853 } 854 855 div64 (sregs->y, rs1, operand2, &result, 1); 856 857 if (result & 0x80000000) 858 sregs->psr |= PSR_N; 859 else 860 sregs->psr &= ~PSR_N; 861 862 if (result == 0) 863 sregs->psr |= PSR_Z; 864 else 865 sregs->psr &= ~PSR_Z; 866 867 /* FIXME: should set overflow flag correctly. */ 868 sregs->psr &= ~(PSR_C | PSR_V); 869 870 *rdd = result; 871 } 872 break; 873 case UDIV: 874 { 875 if (sparclite) { 876 sregs->trap = TRAP_UNIMP; 877 break; 878 } 879 880 if (operand2 == 0) { 881 sregs->trap = TRAP_DIV0; 882 break; 883 } 884 885 div64 (sregs->y, rs1, operand2, rdd, 0); 886 } 887 break; 888 case UDIVCC: 889 { 890 uint32 result; 891 892 if (sparclite) { 893 sregs->trap = TRAP_UNIMP; 894 break; 895 } 896 897 if (operand2 == 0) { 898 sregs->trap = TRAP_DIV0; 899 break; 900 } 901 902 div64 (sregs->y, rs1, operand2, &result, 0); 903 904 if (result & 0x80000000) 905 sregs->psr |= PSR_N; 906 else 907 sregs->psr &= ~PSR_N; 908 909 if (result == 0) 910 sregs->psr |= PSR_Z; 911 else 912 sregs->psr &= ~PSR_Z; 913 914 /* FIXME: should set overflow flag correctly. */ 915 sregs->psr &= ~(PSR_C | PSR_V); 916 917 *rdd = result; 918 } 919 break; 920 case IXNOR: 921 *rdd = rs1 ^ ~operand2; 922 break; 923 case IXNORCC: 924 *rdd = rs1 ^ ~operand2; 925 log_cc(*rdd, sregs); 926 break; 927 case IXOR: 928 *rdd = rs1 ^ operand2; 929 break; 930 case IXORCC: 931 *rdd = rs1 ^ operand2; 932 log_cc(*rdd, sregs); 933 break; 934 case IOR: 935 *rdd = rs1 | operand2; 936 break; 937 case IORCC: 938 *rdd = rs1 | operand2; 939 log_cc(*rdd, sregs); 940 break; 941 case IORN: 942 *rdd = rs1 | ~operand2; 943 break; 944 case IORNCC: 945 *rdd = rs1 | ~operand2; 946 log_cc(*rdd, sregs); 947 break; 948 case IANDNCC: 949 *rdd = rs1 & ~operand2; 950 log_cc(*rdd, sregs); 951 break; 952 case IANDN: 953 *rdd = rs1 & ~operand2; 954 break; 955 case IAND: 956 *rdd = rs1 & operand2; 957 break; 958 case IANDCC: 959 *rdd = rs1 & operand2; 960 log_cc(*rdd, sregs); 961 break; 962 case SUB: 963 *rdd = rs1 - operand2; 964 break; 965 case SUBCC: 966 *rdd = rs1 - operand2; 967 sregs->psr = sub_cc(sregs->psr, rs1, operand2, *rdd); 968 break; 969 case SUBX: 970 *rdd = rs1 - operand2 - ((sregs->psr >> 20) & 1); 971 break; 972 case SUBXCC: 973 *rdd = rs1 - operand2 - ((sregs->psr >> 20) & 1); 974 sregs->psr = sub_cc(sregs->psr, rs1, operand2, *rdd); 975 break; 976 case ADD: 977 *rdd = rs1 + operand2; 978 break; 979 case ADDCC: 980 *rdd = rs1 + operand2; 981 sregs->psr = add_cc(sregs->psr, rs1, operand2, *rdd); 982 break; 983 case ADDX: 984 *rdd = rs1 + operand2 + ((sregs->psr >> 20) & 1); 985 break; 986 case ADDXCC: 987 *rdd = rs1 + operand2 + ((sregs->psr >> 20) & 1); 988 sregs->psr = add_cc(sregs->psr, rs1, operand2, *rdd); 989 break; 990 case TADDCC: 991 *rdd = rs1 + operand2; 992 sregs->psr = add_cc(sregs->psr, rs1, operand2, *rdd); 993 if ((rs1 | operand2) & 0x3) 994 sregs->psr |= PSR_V; 995 break; 996 case TSUBCC: 997 *rdd = rs1 - operand2; 998 sregs->psr = sub_cc (sregs->psr, rs1, operand2, *rdd); 999 if ((rs1 | operand2) & 0x3) 1000 sregs->psr |= PSR_V; 1001 break; 1002 case TADDCCTV: 1003 *rdd = rs1 + operand2; 1004 result = add_cc(0, rs1, operand2, *rdd); 1005 if ((rs1 | operand2) & 0x3) 1006 result |= PSR_V; 1007 if (result & PSR_V) { 1008 sregs->trap = TRAP_TAG; 1009 } else { 1010 sregs->psr = (sregs->psr & ~PSR_CC) | result; 1011 } 1012 break; 1013 case TSUBCCTV: 1014 *rdd = rs1 - operand2; 1015 result = add_cc (0, rs1, operand2, *rdd); 1016 if ((rs1 | operand2) & 0x3) 1017 result |= PSR_V; 1018 if (result & PSR_V) 1019 { 1020 sregs->trap = TRAP_TAG; 1021 } 1022 else 1023 { 1024 sregs->psr = (sregs->psr & ~PSR_CC) | result; 1025 } 1026 break; 1027 case SLL: 1028 *rdd = rs1 << (operand2 & 0x1f); 1029 break; 1030 case SRL: 1031 *rdd = rs1 >> (operand2 & 0x1f); 1032 break; 1033 case SRA: 1034 *rdd = ((int) rs1) >> (operand2 & 0x1f); 1035 break; 1036 case FLUSH: 1037 if (ift) sregs->trap = TRAP_UNIMP; 1038 break; 1039 case SAVE: 1040 new_cwp = ((sregs->psr & PSR_CWP) - 1) & PSR_CWP; 1041 if (sregs->wim & (1 << new_cwp)) { 1042 sregs->trap = TRAP_WOFL; 1043 break; 1044 } 1045 if (rd > 7) 1046 rdd = &(sregs->r[((new_cwp << 4) + rd) & 0x7f]); 1047 *rdd = rs1 + operand2; 1048 sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp; 1049 break; 1050 case RESTORE: 1051 1052 new_cwp = ((sregs->psr & PSR_CWP) + 1) & PSR_CWP; 1053 if (sregs->wim & (1 << new_cwp)) { 1054 sregs->trap = TRAP_WUFL; 1055 break; 1056 } 1057 if (rd > 7) 1058 rdd = &(sregs->r[((new_cwp << 4) + rd) & 0x7f]); 1059 *rdd = rs1 + operand2; 1060 sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp; 1061 break; 1062 case RDPSR: 1063 if (!(sregs->psr & PSR_S)) { 1064 sregs->trap = TRAP_PRIVI; 1065 break; 1066 } 1067 *rdd = sregs->psr; 1068 break; 1069 case RDY: 1070 if (!sparclite) 1071 *rdd = sregs->y; 1072 else { 1073 int rs1_is_asr = (sregs->inst >> 14) & 0x1f; 1074 if ( 0 == rs1_is_asr ) 1075 *rdd = sregs->y; 1076 else if ( 17 == rs1_is_asr ) 1077 *rdd = sregs->asr17; 1078 else { 1079 sregs->trap = TRAP_UNIMP; 1080 break; 1081 } 1082 } 1083 break; 1084 case RDWIM: 1085 if (!(sregs->psr & PSR_S)) { 1086 sregs->trap = TRAP_PRIVI; 1087 break; 1088 } 1089 *rdd = sregs->wim; 1090 break; 1091 case RDTBR: 1092 if (!(sregs->psr & PSR_S)) { 1093 sregs->trap = TRAP_PRIVI; 1094 break; 1095 } 1096 *rdd = sregs->tbr; 1097 break; 1098 case WRPSR: 1099 if ((sregs->psr & 0x1f) > 7) { 1100 sregs->trap = TRAP_UNIMP; 1101 break; 1102 } 1103 if (!(sregs->psr & PSR_S)) { 1104 sregs->trap = TRAP_PRIVI; 1105 break; 1106 } 1107 sregs->psr = (sregs->psr & 0xff000000) | 1108 (rs1 ^ operand2) & 0x00f03fff; 1109 break; 1110 case WRWIM: 1111 if (!(sregs->psr & PSR_S)) { 1112 sregs->trap = TRAP_PRIVI; 1113 break; 1114 } 1115 sregs->wim = (rs1 ^ operand2) & 0x0ff; 1116 break; 1117 case WRTBR: 1118 if (!(sregs->psr & PSR_S)) { 1119 sregs->trap = TRAP_PRIVI; 1120 break; 1121 } 1122 sregs->tbr = (sregs->tbr & 0x00000ff0) | 1123 ((rs1 ^ operand2) & 0xfffff000); 1124 break; 1125 case WRY: 1126 if (!sparclite) 1127 sregs->y = (rs1 ^ operand2); 1128 else { 1129 if ( 0 == rd ) 1130 sregs->y = (rs1 ^ operand2); 1131 else if ( 17 == rd ) 1132 sregs->asr17 = (rs1 ^ operand2); 1133 else { 1134 sregs->trap = TRAP_UNIMP; 1135 break; 1136 } 1137 } 1138 break; 1139 case JMPL: 1140 1141 #ifdef STAT 1142 sregs->nbranch++; 1143 #endif 1144 sregs->icnt = T_JMPL; /* JMPL takes two cycles */ 1145 if (rs1 & 0x3) { 1146 sregs->trap = TRAP_UNALI; 1147 break; 1148 } 1149 *rdd = sregs->pc; 1150 npc = rs1 + operand2; 1151 break; 1152 case RETT: 1153 address = rs1 + operand2; 1154 new_cwp = ((sregs->psr & PSR_CWP) + 1) & PSR_CWP; 1155 sregs->icnt = T_RETT; /* RETT takes two cycles */ 1156 if (sregs->psr & PSR_ET) { 1157 sregs->trap = TRAP_UNIMP; 1158 break; 1159 } 1160 if (!(sregs->psr & PSR_S)) { 1161 sregs->trap = TRAP_PRIVI; 1162 break; 1163 } 1164 if (sregs->wim & (1 << new_cwp)) { 1165 sregs->trap = TRAP_WUFL; 1166 break; 1167 } 1168 if (address & 0x3) { 1169 sregs->trap = TRAP_UNALI; 1170 break; 1171 } 1172 sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp | PSR_ET; 1173 sregs->psr = 1174 (sregs->psr & ~PSR_S) | ((sregs->psr & PSR_PS) << 1); 1175 npc = address; 1176 break; 1177 1178 case SCAN: 1179 { 1180 uint32 result, mask; 1181 int i; 1182 1183 if (!sparclite) { 1184 sregs->trap = TRAP_UNIMP; 1185 break; 1186 } 1187 mask = (operand2 & 0x80000000) | (operand2 >> 1); 1188 result = rs1 ^ mask; 1189 1190 for (i = 0; i < 32; i++) { 1191 if (result & 0x80000000) 1192 break; 1193 result <<= 1; 1194 } 1195 1196 *rdd = i == 32 ? 63 : i; 1197 } 1198 break; 1199 1200 default: 1201 sregs->trap = TRAP_UNIMP; 1202 break; 1203 } 1204 } 1205 break; 1206 case 3: /* Load/store instructions */ 1207 1208 address = rs1 + operand2; 1209 1210 if (sregs->psr & PSR_S) 1211 asi = 11; 1212 else 1213 asi = 10; 1214 1215 if (op3 & 4) { 1216 sregs->icnt = T_ST; /* Set store instruction count */ 1217 #ifdef STAT 1218 sregs->nstore++; 1219 #endif 1220 } else { 1221 sregs->icnt = T_LD; /* Set load instruction count */ 1222 #ifdef STAT 1223 sregs->nload++; 1224 #endif 1225 } 1226 1227 /* Decode load/store instructions */ 1228 1229 switch (op3) { 1230 case LDDA: 1231 if (!chk_asi(sregs, &asi, op3)) break; 1232 case LDD: 1233 if (address & 0x7) { 1234 sregs->trap = TRAP_UNALI; 1235 break; 1236 } 1237 if (rd & 1) { 1238 rd &= 0x1e; 1239 if (rd > 7) 1240 rdd = &(sregs->r[(cwp + rd) & 0x7f]); 1241 else 1242 rdd = &(sregs->g[rd]); 1243 } 1244 mexc = memory_read (asi, address, ddata, 2, &ws); 1245 sregs->hold += ws; 1246 mexc |= memory_read (asi, address+4, &ddata[1], 2, &ws); 1247 sregs->hold += ws; 1248 sregs->icnt = T_LDD; 1249 if (mexc) { 1250 sregs->trap = TRAP_DEXC; 1251 } else { 1252 rdd[0] = ddata[0]; 1253 rdd[1] = ddata[1]; 1254 #ifdef STAT 1255 sregs->nload++; /* Double load counts twice */ 1256 #endif 1257 } 1258 break; 1259 1260 case LDA: 1261 if (!chk_asi(sregs, &asi, op3)) break; 1262 case LD: 1263 if (address & 0x3) { 1264 sregs->trap = TRAP_UNALI; 1265 break; 1266 } 1267 mexc = memory_read(asi, address, &data, 2, &ws); 1268 sregs->hold += ws; 1269 if (mexc) { 1270 sregs->trap = TRAP_DEXC; 1271 } else { 1272 *rdd = data; 1273 } 1274 break; 1275 case LDSTUBA: 1276 if (!chk_asi(sregs, &asi, op3)) break; 1277 case LDSTUB: 1278 mexc = memory_read(asi, address, &data, 0, &ws); 1279 sregs->hold += ws; 1280 sregs->icnt = T_LDST; 1281 if (mexc) { 1282 sregs->trap = TRAP_DEXC; 1283 break; 1284 } 1285 data = extract_byte (data, address); 1286 *rdd = data; 1287 data = 0x0ff; 1288 mexc = memory_write(asi, address, &data, 0, &ws); 1289 sregs->hold += ws; 1290 if (mexc) { 1291 sregs->trap = TRAP_DEXC; 1292 } 1293 #ifdef STAT 1294 sregs->nload++; 1295 #endif 1296 break; 1297 case LDSBA: 1298 case LDUBA: 1299 if (!chk_asi(sregs, &asi, op3)) break; 1300 case LDSB: 1301 case LDUB: 1302 mexc = memory_read(asi, address, &data, 0, &ws); 1303 sregs->hold += ws; 1304 if (mexc) { 1305 sregs->trap = TRAP_DEXC; 1306 break; 1307 } 1308 if (op3 == LDSB) 1309 data = extract_byte_signed (data, address); 1310 else 1311 data = extract_byte (data, address); 1312 *rdd = data; 1313 break; 1314 case LDSHA: 1315 case LDUHA: 1316 if (!chk_asi(sregs, &asi, op3)) break; 1317 case LDSH: 1318 case LDUH: 1319 if (address & 0x1) { 1320 sregs->trap = TRAP_UNALI; 1321 break; 1322 } 1323 mexc = memory_read(asi, address, &data, 1, &ws); 1324 sregs->hold += ws; 1325 if (mexc) { 1326 sregs->trap = TRAP_DEXC; 1327 break; 1328 } 1329 if (op3 == LDSH) 1330 data = extract_short_signed (data, address); 1331 else 1332 data = extract_short (data, address); 1333 *rdd = data; 1334 break; 1335 case LDF: 1336 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1337 sregs->trap = TRAP_FPDIS; 1338 break; 1339 } 1340 if (address & 0x3) { 1341 sregs->trap = TRAP_UNALI; 1342 break; 1343 } 1344 if (ebase.simtime < sregs->ftime) { 1345 if ((sregs->frd == rd) || (sregs->frs1 == rd) || 1346 (sregs->frs2 == rd)) 1347 sregs->fhold += (sregs->ftime - ebase.simtime); 1348 } 1349 mexc = memory_read(asi, address, &data, 2, &ws); 1350 sregs->hold += ws; 1351 sregs->flrd = rd; 1352 sregs->ltime = ebase.simtime + sregs->icnt + FLSTHOLD + 1353 sregs->hold + sregs->fhold; 1354 if (mexc) { 1355 sregs->trap = TRAP_DEXC; 1356 } else { 1357 sregs->fs[rd] = *((float32 *) & data); 1358 } 1359 break; 1360 case LDDF: 1361 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1362 sregs->trap = TRAP_FPDIS; 1363 break; 1364 } 1365 if (address & 0x7) { 1366 sregs->trap = TRAP_UNALI; 1367 break; 1368 } 1369 if (ebase.simtime < sregs->ftime) { 1370 if (((sregs->frd >> 1) == (rd >> 1)) || 1371 ((sregs->frs1 >> 1) == (rd >> 1)) || 1372 ((sregs->frs2 >> 1) == (rd >> 1))) 1373 sregs->fhold += (sregs->ftime - ebase.simtime); 1374 } 1375 mexc = memory_read (asi, address, ddata, 2, &ws); 1376 sregs->hold += ws; 1377 mexc |= memory_read (asi, address+4, &ddata[1], 2, &ws); 1378 sregs->hold += ws; 1379 sregs->icnt = T_LDD; 1380 if (mexc) { 1381 sregs->trap = TRAP_DEXC; 1382 } else { 1383 rd &= 0x1E; 1384 sregs->flrd = rd; 1385 sregs->fs[rd] = *((float32 *) & ddata[0]); 1386 #ifdef STAT 1387 sregs->nload++; /* Double load counts twice */ 1388 #endif 1389 sregs->fs[rd + 1] = *((float32 *) & ddata[1]); 1390 sregs->ltime = ebase.simtime + sregs->icnt + FLSTHOLD + 1391 sregs->hold + sregs->fhold; 1392 } 1393 break; 1394 case LDFSR: 1395 if (ebase.simtime < sregs->ftime) { 1396 sregs->fhold += (sregs->ftime - ebase.simtime); 1397 } 1398 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1399 sregs->trap = TRAP_FPDIS; 1400 break; 1401 } 1402 if (address & 0x3) { 1403 sregs->trap = TRAP_UNALI; 1404 break; 1405 } 1406 mexc = memory_read(asi, address, &data, 2, &ws); 1407 sregs->hold += ws; 1408 if (mexc) { 1409 sregs->trap = TRAP_DEXC; 1410 } else { 1411 sregs->fsr = 1412 (sregs->fsr & 0x7FF000) | (data & ~0x7FF000); 1413 set_fsr(sregs->fsr); 1414 } 1415 break; 1416 case STFSR: 1417 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1418 sregs->trap = TRAP_FPDIS; 1419 break; 1420 } 1421 if (address & 0x3) { 1422 sregs->trap = TRAP_UNALI; 1423 break; 1424 } 1425 if (ebase.simtime < sregs->ftime) { 1426 sregs->fhold += (sregs->ftime - ebase.simtime); 1427 } 1428 mexc = memory_write(asi, address, &sregs->fsr, 2, &ws); 1429 sregs->hold += ws; 1430 if (mexc) { 1431 sregs->trap = TRAP_DEXC; 1432 } 1433 break; 1434 1435 case STA: 1436 if (!chk_asi(sregs, &asi, op3)) break; 1437 case ST: 1438 if (address & 0x3) { 1439 sregs->trap = TRAP_UNALI; 1440 break; 1441 } 1442 mexc = memory_write(asi, address, rdd, 2, &ws); 1443 sregs->hold += ws; 1444 if (mexc) { 1445 sregs->trap = TRAP_DEXC; 1446 } 1447 break; 1448 case STBA: 1449 if (!chk_asi(sregs, &asi, op3)) break; 1450 case STB: 1451 mexc = memory_write(asi, address, rdd, 0, &ws); 1452 sregs->hold += ws; 1453 if (mexc) { 1454 sregs->trap = TRAP_DEXC; 1455 } 1456 break; 1457 case STDA: 1458 if (!chk_asi(sregs, &asi, op3)) break; 1459 case STD: 1460 if (address & 0x7) { 1461 sregs->trap = TRAP_UNALI; 1462 break; 1463 } 1464 if (rd & 1) { 1465 rd &= 0x1e; 1466 if (rd > 7) 1467 rdd = &(sregs->r[(cwp + rd) & 0x7f]); 1468 else 1469 rdd = &(sregs->g[rd]); 1470 } 1471 mexc = memory_write(asi, address, rdd, 3, &ws); 1472 sregs->hold += ws; 1473 sregs->icnt = T_STD; 1474 #ifdef STAT 1475 sregs->nstore++; /* Double store counts twice */ 1476 #endif 1477 if (mexc) { 1478 sregs->trap = TRAP_DEXC; 1479 break; 1480 } 1481 break; 1482 case STDFQ: 1483 if ((sregs->psr & 0x1f) > 7) { 1484 sregs->trap = TRAP_UNIMP; 1485 break; 1486 } 1487 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1488 sregs->trap = TRAP_FPDIS; 1489 break; 1490 } 1491 if (address & 0x7) { 1492 sregs->trap = TRAP_UNALI; 1493 break; 1494 } 1495 if (!(sregs->fsr & FSR_QNE)) { 1496 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_SEQ_ERR; 1497 break; 1498 } 1499 rdd = &(sregs->fpq[0]); 1500 mexc = memory_write(asi, address, rdd, 3, &ws); 1501 sregs->hold += ws; 1502 sregs->icnt = T_STD; 1503 #ifdef STAT 1504 sregs->nstore++; /* Double store counts twice */ 1505 #endif 1506 if (mexc) { 1507 sregs->trap = TRAP_DEXC; 1508 break; 1509 } else { 1510 sregs->fsr &= ~FSR_QNE; 1511 sregs->fpstate = FP_EXE_MODE; 1512 } 1513 break; 1514 case STHA: 1515 if (!chk_asi(sregs, &asi, op3)) break; 1516 case STH: 1517 if (address & 0x1) { 1518 sregs->trap = TRAP_UNALI; 1519 break; 1520 } 1521 mexc = memory_write(asi, address, rdd, 1, &ws); 1522 sregs->hold += ws; 1523 if (mexc) { 1524 sregs->trap = TRAP_DEXC; 1525 } 1526 break; 1527 case STF: 1528 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1529 sregs->trap = TRAP_FPDIS; 1530 break; 1531 } 1532 if (address & 0x3) { 1533 sregs->trap = TRAP_UNALI; 1534 break; 1535 } 1536 if (ebase.simtime < sregs->ftime) { 1537 if (sregs->frd == rd) 1538 sregs->fhold += (sregs->ftime - ebase.simtime); 1539 } 1540 mexc = memory_write(asi, address, &sregs->fsi[rd], 2, &ws); 1541 sregs->hold += ws; 1542 if (mexc) { 1543 sregs->trap = TRAP_DEXC; 1544 } 1545 break; 1546 case STDF: 1547 if (!((sregs->psr & PSR_EF) && FP_PRES)) { 1548 sregs->trap = TRAP_FPDIS; 1549 break; 1550 } 1551 if (address & 0x7) { 1552 sregs->trap = TRAP_UNALI; 1553 break; 1554 } 1555 rd &= 0x1E; 1556 if (ebase.simtime < sregs->ftime) { 1557 if ((sregs->frd == rd) || (sregs->frd + 1 == rd)) 1558 sregs->fhold += (sregs->ftime - ebase.simtime); 1559 } 1560 mexc = memory_write(asi, address, &sregs->fsi[rd], 3, &ws); 1561 sregs->hold += ws; 1562 sregs->icnt = T_STD; 1563 #ifdef STAT 1564 sregs->nstore++; /* Double store counts twice */ 1565 #endif 1566 if (mexc) { 1567 sregs->trap = TRAP_DEXC; 1568 } 1569 break; 1570 case SWAPA: 1571 if (!chk_asi(sregs, &asi, op3)) break; 1572 case SWAP: 1573 if (address & 0x3) { 1574 sregs->trap = TRAP_UNALI; 1575 break; 1576 } 1577 mexc = memory_read(asi, address, &data, 2, &ws); 1578 sregs->hold += ws; 1579 if (mexc) { 1580 sregs->trap = TRAP_DEXC; 1581 break; 1582 } 1583 mexc = memory_write(asi, address, rdd, 2, &ws); 1584 sregs->hold += ws; 1585 sregs->icnt = T_LDST; 1586 if (mexc) { 1587 sregs->trap = TRAP_DEXC; 1588 break; 1589 } else 1590 *rdd = data; 1591 #ifdef STAT 1592 sregs->nload++; 1593 #endif 1594 break; 1595 1596 1597 default: 1598 sregs->trap = TRAP_UNIMP; 1599 break; 1600 } 1601 1602 #ifdef LOAD_DEL 1603 1604 if (!(op3 & 4)) { 1605 sregs->ildtime = ebase.simtime + sregs->hold + sregs->icnt; 1606 sregs->ildreg = rd; 1607 if ((op3 | 0x10) == 0x13) 1608 sregs->ildreg |= 1; /* Double load, odd register loaded 1609 * last */ 1610 } 1611 #endif 1612 break; 1613 1614 default: 1615 sregs->trap = TRAP_UNIMP; 1616 break; 1617 } 1618 sregs->g[0] = 0; 1619 if (!sregs->trap) { 1620 sregs->pc = pc; 1621 sregs->npc = npc; 1622 } 1623 return 0; 1624 } 1625 1626 #define T_FABSs 2 1627 #define T_FADDs 4 1628 #define T_FADDd 4 1629 #define T_FCMPs 4 1630 #define T_FCMPd 4 1631 #define T_FDIVs 20 1632 #define T_FDIVd 35 1633 #define T_FMOVs 2 1634 #define T_FMULs 5 1635 #define T_FMULd 9 1636 #define T_FNEGs 2 1637 #define T_FSQRTs 37 1638 #define T_FSQRTd 65 1639 #define T_FSUBs 4 1640 #define T_FSUBd 4 1641 #define T_FdTOi 7 1642 #define T_FdTOs 3 1643 #define T_FiTOs 6 1644 #define T_FiTOd 6 1645 #define T_FsTOi 6 1646 #define T_FsTOd 2 1647 1648 #define FABSs 0x09 1649 #define FADDs 0x41 1650 #define FADDd 0x42 1651 #define FCMPs 0x51 1652 #define FCMPd 0x52 1653 #define FCMPEs 0x55 1654 #define FCMPEd 0x56 1655 #define FDIVs 0x4D 1656 #define FDIVd 0x4E 1657 #define FMOVs 0x01 1658 #define FMULs 0x49 1659 #define FMULd 0x4A 1660 #define FNEGs 0x05 1661 #define FSQRTs 0x29 1662 #define FSQRTd 0x2A 1663 #define FSUBs 0x45 1664 #define FSUBd 0x46 1665 #define FdTOi 0xD2 1666 #define FdTOs 0xC6 1667 #define FiTOs 0xC4 1668 #define FiTOd 0xC8 1669 #define FsTOi 0xD1 1670 #define FsTOd 0xC9 1671 1672 1673 static int 1674 fpexec(op3, rd, rs1, rs2, sregs) 1675 uint32 op3, rd, rs1, rs2; 1676 struct pstate *sregs; 1677 { 1678 uint32 opf, tem, accex; 1679 int32 fcc; 1680 uint32 ldadj; 1681 1682 if (sregs->fpstate == FP_EXC_MODE) { 1683 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_SEQ_ERR; 1684 sregs->fpstate = FP_EXC_PE; 1685 return 0; 1686 } 1687 if (sregs->fpstate == FP_EXC_PE) { 1688 sregs->fpstate = FP_EXC_MODE; 1689 return TRAP_FPEXC; 1690 } 1691 opf = (sregs->inst >> 5) & 0x1ff; 1692 1693 /* 1694 * Check if we already have an FPop in the pipe. If so, halt until it is 1695 * finished by incrementing fhold with the remaining execution time 1696 */ 1697 1698 if (ebase.simtime < sregs->ftime) { 1699 sregs->fhold = (sregs->ftime - ebase.simtime); 1700 } else { 1701 sregs->fhold = 0; 1702 1703 /* Check load dependencies. */ 1704 1705 if (ebase.simtime < sregs->ltime) { 1706 1707 /* Don't check rs1 if single operand instructions */ 1708 1709 if (((opf >> 6) == 0) || ((opf >> 6) == 3)) 1710 rs1 = 32; 1711 1712 /* Adjust for double floats */ 1713 1714 ldadj = opf & 1; 1715 if (!(((sregs->flrd - rs1) >> ldadj) && ((sregs->flrd - rs2) >> ldadj))) 1716 sregs->fhold++; 1717 } 1718 } 1719 1720 sregs->finst++; 1721 1722 sregs->frs1 = rs1; /* Store src and dst for dependecy check */ 1723 sregs->frs2 = rs2; 1724 sregs->frd = rd; 1725 1726 sregs->ftime = ebase.simtime + sregs->hold + sregs->fhold; 1727 1728 /* SPARC is big-endian - swap double floats if host is little-endian */ 1729 /* This is ugly - I know ... */ 1730 1731 /* FIXME: should use (HOST_BYTE_ORDER == CURRENT_TARGET_BYTE_ORDER) 1732 but what about machines where float values are different endianness 1733 from integer values? */ 1734 1735 #ifdef HOST_LITTLE_ENDIAN 1736 rs1 &= 0x1f; 1737 switch (opf) { 1738 case FADDd: 1739 case FDIVd: 1740 case FMULd: 1741 case FSQRTd: 1742 case FSUBd: 1743 case FCMPd: 1744 case FCMPEd: 1745 case FdTOi: 1746 case FdTOs: 1747 sregs->fdp[rs1 | 1] = sregs->fs[rs1 & ~1]; 1748 sregs->fdp[rs1 & ~1] = sregs->fs[rs1 | 1]; 1749 sregs->fdp[rs2 | 1] = sregs->fs[rs2 & ~1]; 1750 sregs->fdp[rs2 & ~1] = sregs->fs[rs2 | 1]; 1751 default: 1752 break; 1753 } 1754 #endif 1755 1756 clear_accex(); 1757 1758 switch (opf) { 1759 case FABSs: 1760 sregs->fs[rd] = fabs(sregs->fs[rs2]); 1761 sregs->ftime += T_FABSs; 1762 sregs->frs1 = 32; /* rs1 ignored */ 1763 break; 1764 case FADDs: 1765 sregs->fs[rd] = sregs->fs[rs1] + sregs->fs[rs2]; 1766 sregs->ftime += T_FADDs; 1767 break; 1768 case FADDd: 1769 sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] + sregs->fd[rs2 >> 1]; 1770 sregs->ftime += T_FADDd; 1771 break; 1772 case FCMPs: 1773 case FCMPEs: 1774 if (sregs->fs[rs1] == sregs->fs[rs2]) 1775 fcc = 3; 1776 else if (sregs->fs[rs1] < sregs->fs[rs2]) 1777 fcc = 2; 1778 else if (sregs->fs[rs1] > sregs->fs[rs2]) 1779 fcc = 1; 1780 else 1781 fcc = 0; 1782 sregs->fsr |= 0x0C00; 1783 sregs->fsr &= ~(fcc << 10); 1784 sregs->ftime += T_FCMPs; 1785 sregs->frd = 32; /* rd ignored */ 1786 if ((fcc == 0) && (opf == FCMPEs)) { 1787 sregs->fpstate = FP_EXC_PE; 1788 sregs->fsr = (sregs->fsr & ~0x1C000) | (1 << 14); 1789 } 1790 break; 1791 case FCMPd: 1792 case FCMPEd: 1793 if (sregs->fd[rs1 >> 1] == sregs->fd[rs2 >> 1]) 1794 fcc = 3; 1795 else if (sregs->fd[rs1 >> 1] < sregs->fd[rs2 >> 1]) 1796 fcc = 2; 1797 else if (sregs->fd[rs1 >> 1] > sregs->fd[rs2 >> 1]) 1798 fcc = 1; 1799 else 1800 fcc = 0; 1801 sregs->fsr |= 0x0C00; 1802 sregs->fsr &= ~(fcc << 10); 1803 sregs->ftime += T_FCMPd; 1804 sregs->frd = 32; /* rd ignored */ 1805 if ((fcc == 0) && (opf == FCMPEd)) { 1806 sregs->fpstate = FP_EXC_PE; 1807 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE; 1808 } 1809 break; 1810 case FDIVs: 1811 sregs->fs[rd] = sregs->fs[rs1] / sregs->fs[rs2]; 1812 sregs->ftime += T_FDIVs; 1813 break; 1814 case FDIVd: 1815 sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] / sregs->fd[rs2 >> 1]; 1816 sregs->ftime += T_FDIVd; 1817 break; 1818 case FMOVs: 1819 sregs->fs[rd] = sregs->fs[rs2]; 1820 sregs->ftime += T_FMOVs; 1821 sregs->frs1 = 32; /* rs1 ignored */ 1822 break; 1823 case FMULs: 1824 sregs->fs[rd] = sregs->fs[rs1] * sregs->fs[rs2]; 1825 sregs->ftime += T_FMULs; 1826 break; 1827 case FMULd: 1828 sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] * sregs->fd[rs2 >> 1]; 1829 sregs->ftime += T_FMULd; 1830 break; 1831 case FNEGs: 1832 sregs->fs[rd] = -sregs->fs[rs2]; 1833 sregs->ftime += T_FNEGs; 1834 sregs->frs1 = 32; /* rs1 ignored */ 1835 break; 1836 case FSQRTs: 1837 if (sregs->fs[rs2] < 0.0) { 1838 sregs->fpstate = FP_EXC_PE; 1839 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE; 1840 sregs->fsr = (sregs->fsr & 0x1f) | 0x10; 1841 break; 1842 } 1843 sregs->fs[rd] = sqrt(sregs->fs[rs2]); 1844 sregs->ftime += T_FSQRTs; 1845 sregs->frs1 = 32; /* rs1 ignored */ 1846 break; 1847 case FSQRTd: 1848 if (sregs->fd[rs2 >> 1] < 0.0) { 1849 sregs->fpstate = FP_EXC_PE; 1850 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE; 1851 sregs->fsr = (sregs->fsr & 0x1f) | 0x10; 1852 break; 1853 } 1854 sregs->fd[rd >> 1] = sqrt(sregs->fd[rs2 >> 1]); 1855 sregs->ftime += T_FSQRTd; 1856 sregs->frs1 = 32; /* rs1 ignored */ 1857 break; 1858 case FSUBs: 1859 sregs->fs[rd] = sregs->fs[rs1] - sregs->fs[rs2]; 1860 sregs->ftime += T_FSUBs; 1861 break; 1862 case FSUBd: 1863 sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] - sregs->fd[rs2 >> 1]; 1864 sregs->ftime += T_FSUBd; 1865 break; 1866 case FdTOi: 1867 sregs->fsi[rd] = (int) sregs->fd[rs2 >> 1]; 1868 sregs->ftime += T_FdTOi; 1869 sregs->frs1 = 32; /* rs1 ignored */ 1870 break; 1871 case FdTOs: 1872 sregs->fs[rd] = (float32) sregs->fd[rs2 >> 1]; 1873 sregs->ftime += T_FdTOs; 1874 sregs->frs1 = 32; /* rs1 ignored */ 1875 break; 1876 case FiTOs: 1877 sregs->fs[rd] = (float32) sregs->fsi[rs2]; 1878 sregs->ftime += T_FiTOs; 1879 sregs->frs1 = 32; /* rs1 ignored */ 1880 break; 1881 case FiTOd: 1882 sregs->fd[rd >> 1] = (float64) sregs->fsi[rs2]; 1883 sregs->ftime += T_FiTOd; 1884 sregs->frs1 = 32; /* rs1 ignored */ 1885 break; 1886 case FsTOi: 1887 sregs->fsi[rd] = (int) sregs->fs[rs2]; 1888 sregs->ftime += T_FsTOi; 1889 sregs->frs1 = 32; /* rs1 ignored */ 1890 break; 1891 case FsTOd: 1892 sregs->fd[rd >> 1] = sregs->fs[rs2]; 1893 sregs->ftime += T_FsTOd; 1894 sregs->frs1 = 32; /* rs1 ignored */ 1895 break; 1896 1897 default: 1898 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_UNIMP; 1899 sregs->fpstate = FP_EXC_PE; 1900 } 1901 1902 #ifdef ERRINJ 1903 if (errftt) { 1904 sregs->fsr = (sregs->fsr & ~FSR_TT) | (errftt << 14); 1905 sregs->fpstate = FP_EXC_PE; 1906 if (sis_verbose) printf("Inserted fpu error %X\n",errftt); 1907 errftt = 0; 1908 } 1909 #endif 1910 1911 accex = get_accex(); 1912 1913 #ifdef HOST_LITTLE_ENDIAN 1914 switch (opf) { 1915 case FADDd: 1916 case FDIVd: 1917 case FMULd: 1918 case FSQRTd: 1919 case FSUBd: 1920 case FiTOd: 1921 case FsTOd: 1922 sregs->fs[rd & ~1] = sregs->fdp[rd | 1]; 1923 sregs->fs[rd | 1] = sregs->fdp[rd & ~1]; 1924 default: 1925 break; 1926 } 1927 #endif 1928 if (sregs->fpstate == FP_EXC_PE) { 1929 sregs->fpq[0] = sregs->pc; 1930 sregs->fpq[1] = sregs->inst; 1931 sregs->fsr |= FSR_QNE; 1932 } else { 1933 tem = (sregs->fsr >> 23) & 0x1f; 1934 if (tem & accex) { 1935 sregs->fpstate = FP_EXC_PE; 1936 sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE; 1937 sregs->fsr = ((sregs->fsr & ~0x1f) | accex); 1938 } else { 1939 sregs->fsr = ((((sregs->fsr >> 5) | accex) << 5) | accex); 1940 } 1941 if (sregs->fpstate == FP_EXC_PE) { 1942 sregs->fpq[0] = sregs->pc; 1943 sregs->fpq[1] = sregs->inst; 1944 sregs->fsr |= FSR_QNE; 1945 } 1946 } 1947 clear_accex(); 1948 1949 return 0; 1950 1951 1952 } 1953 1954 static int 1955 chk_asi(sregs, asi, op3) 1956 struct pstate *sregs; 1957 uint32 *asi, op3; 1958 1959 { 1960 if (!(sregs->psr & PSR_S)) { 1961 sregs->trap = TRAP_PRIVI; 1962 return 0; 1963 } else if (sregs->inst & INST_I) { 1964 sregs->trap = TRAP_UNIMP; 1965 return 0; 1966 } else 1967 *asi = (sregs->inst >> 5) & 0x0ff; 1968 return 1; 1969 } 1970 1971 int 1972 execute_trap(sregs) 1973 struct pstate *sregs; 1974 { 1975 int32 cwp; 1976 1977 if (sregs->trap == 256) { 1978 sregs->pc = 0; 1979 sregs->npc = 4; 1980 sregs->trap = 0; 1981 } else if (sregs->trap == 257) { 1982 return ERROR; 1983 } else { 1984 1985 if ((sregs->psr & PSR_ET) == 0) 1986 return ERROR; 1987 1988 sregs->tbr = (sregs->tbr & 0xfffff000) | (sregs->trap << 4); 1989 sregs->trap = 0; 1990 sregs->psr &= ~PSR_ET; 1991 sregs->psr |= ((sregs->psr & PSR_S) >> 1); 1992 sregs->annul = 0; 1993 sregs->psr = (((sregs->psr & PSR_CWP) - 1) & 0x7) | (sregs->psr & ~PSR_CWP); 1994 cwp = ((sregs->psr & PSR_CWP) << 4); 1995 sregs->r[(cwp + 17) & 0x7f] = sregs->pc; 1996 sregs->r[(cwp + 18) & 0x7f] = sregs->npc; 1997 sregs->psr |= PSR_S; 1998 sregs->pc = sregs->tbr; 1999 sregs->npc = sregs->tbr + 4; 2000 2001 if ( 0 != (1 & sregs->asr17) ) { 2002 /* single vector trapping! */ 2003 sregs->pc = sregs->tbr & 0xfffff000; 2004 sregs->npc = sregs->pc + 4; 2005 } 2006 2007 /* Increase simulator time */ 2008 sregs->icnt = TRAP_C; 2009 2010 } 2011 2012 2013 return 0; 2014 2015 } 2016 2017 extern struct irqcell irqarr[16]; 2018 2019 int 2020 check_interrupts(sregs) 2021 struct pstate *sregs; 2022 { 2023 #ifdef ERRINJ 2024 if (errtt) { 2025 sregs->trap = errtt; 2026 if (sis_verbose) printf("Inserted error trap 0x%02X\n",errtt); 2027 errtt = 0; 2028 } 2029 #endif 2030 2031 if ((ext_irl) && (sregs->psr & PSR_ET) && 2032 ((ext_irl == 15) || (ext_irl > (int) ((sregs->psr & PSR_PIL) >> 8)))) { 2033 if (sregs->trap == 0) { 2034 sregs->trap = 16 + ext_irl; 2035 irqarr[ext_irl & 0x0f].callback(irqarr[ext_irl & 0x0f].arg); 2036 return 1; 2037 } 2038 } 2039 return 0; 2040 } 2041 2042 void 2043 init_regs(sregs) 2044 struct pstate *sregs; 2045 { 2046 sregs->pc = 0; 2047 sregs->npc = 4; 2048 sregs->trap = 0; 2049 sregs->psr &= 0x00f03fdf; 2050 sregs->psr |= 0x11000080; /* Set supervisor bit */ 2051 sregs->breakpoint = 0; 2052 sregs->annul = 0; 2053 sregs->fpstate = FP_EXE_MODE; 2054 sregs->fpqn = 0; 2055 sregs->ftime = 0; 2056 sregs->ltime = 0; 2057 sregs->err_mode = 0; 2058 ext_irl = 0; 2059 sregs->g[0] = 0; 2060 #ifdef HOST_LITTLE_ENDIAN 2061 sregs->fdp = (float32 *) sregs->fd; 2062 sregs->fsi = (int32 *) sregs->fs; 2063 #else 2064 sregs->fs = (float32 *) sregs->fd; 2065 sregs->fsi = (int32 *) sregs->fd; 2066 #endif 2067 sregs->fsr = 0; 2068 sregs->fpu_pres = !nfp; 2069 set_fsr(sregs->fsr); 2070 sregs->bphit = 0; 2071 sregs->ildreg = 0; 2072 sregs->ildtime = 0; 2073 2074 sregs->y = 0; 2075 sregs->asr17 = 0; 2076 2077 sregs->rett_err = 0; 2078 sregs->jmpltime = 0; 2079 } 2080
Indexes created Mon Mar 02 05:31:46 UTC 2026