Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 137:9fb09db54436
fix powerpc get_fregister_var's regs error.
| author | kono |
|---|---|
| date | Sun, 04 May 2003 22:08:20 +0900 |
| parents | 069960078249 |
| children | e6e77af048a1 |
| rev | line source |
|---|---|
| 61 | 1 /* Micro-C Code Generatation Part for intel386 */ |
| 2 /* $Id$ */ | |
| 3 | |
| 4 #define EXTERN extern | |
| 5 #include "mc.h" | |
| 6 #include "mc-codegen.h" | |
| 93 | 7 #include "mc-code.h" |
| 61 | 8 |
| 94 | 9 #define SAVE_STACKS 1 |
| 10 | |
| 61 | 11 #define TEXT_EMIT_MODE 0 |
| 12 #define DATA_EMIT_MODE 1 | |
| 13 #define RODATA_EMIT_MODE 2 | |
| 14 | |
| 15 static int output_mode = TEXT_EMIT_MODE; | |
| 16 static int data_alignment = 0; | |
| 17 | |
| 119 | 18 int size_of_int = 4; |
| 19 int size_of_float = 4; | |
| 20 int size_of_double = 8; | |
| 21 int size_of_longlong = 8; | |
| 22 int endian = 0; | |
| 23 int MAX_REGISTER=6; /* intel386のレジスタを6つまで使う*/ | |
| 24 #define REAL_MAX_REGISTER 8 /* intel386のレジスタが8つということ*/ | |
| 25 int MAX_DATA_REG=4; | |
| 26 int MAX_POINTER=3; | |
| 27 int MAX_REGISTGER_VAR=2; | |
| 28 int MAX_FREGISTER=1; | |
| 29 | |
| 30 #define MAX_FPU_STACK 7 | |
| 31 | |
| 32 int MAX_INPUT_REGISTER_VAR = 0; | |
| 33 int MAX_CODE_INPUT_REGISTER_VAR = 2; | |
| 34 int MAX_INPUT_DREGISTER_VAR = 0; | |
| 35 int MAX_CODE_INPUT_DREGISTER_VAR = 0; | |
| 61 | 36 |
| 37 /* | |
| 128 | 38 -28 -8 local2 |
| 39 -24 -4 local1 | |
| 40 -20 8 arg3 | |
| 41 -16 4 arg2 | |
| 42 -12 0 arg1 | |
| 43 local2 -20 4 -8 (%edi) | |
| 44 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 45 %edi -12 <- disp_offset %ebp |
| 46 %esi -8 | |
| 47 %ebx -4 | |
| 48 %ebp = %esp 0 | |
| 49 %eip 4 <- arg_offset | |
| 50 arg1 8 0 | |
| 51 arg2 12 4 | |
| 52 see enter/enter1/leave see code_enter | |
| 53 */ | |
| 54 int arg_offset = 8; | |
| 55 int disp_offset = -12; | |
| 56 int func_disp_offset = -12; | |
| 57 int code_disp_offset = 0; | |
| 58 int jump_offset = 0; | |
| 59 | |
| 119 | 60 static int code_disp_label; |
| 61 static int func_disp_label; | |
| 61 | 62 |
| 119 | 63 static int |
| 64 lvar(int l) | |
| 65 { | |
| 66 if (is_code(fnptr)) { | |
| 67 return l+code_disp_offset; | |
| 68 } else if (l<0) { | |
| 69 return l+disp_offset; | |
| 70 } else { | |
| 71 return l+arg_offset; | |
| 72 } | |
| 73 } | |
| 99 | 74 |
| 95 | 75 /* |
| 76 creg currrent virtual register | |
| 77 dreg spare virtual register | |
| 78 | |
| 79 rname[creg] currrent real register | |
| 80 rname[dreg] spare real register | |
| 81 | |
| 82 regs[] virtual register usage | |
| 83 regv[] value in virtual register flag | |
| 84 | |
| 85 reg_name[rname[creg]] | |
| 86 | |
| 87 freg current floating point register | |
| 88 fregv calue in floating point register | |
| 89 */ | |
| 90 | |
| 91 static int dreg; /* general temporal register */ | |
| 92 | |
| 93 int ia32regs[REAL_MAX_REGISTER]; | |
| 94 int ia32regv[REAL_MAX_REGISTER]; | |
| 95 int ia32rname[REAL_MAX_REGISTER]; | |
| 96 | |
| 97 int *regv = ia32regv; | |
| 98 int *regs = ia32regs; | |
| 99 static int *rname = ia32rname; | |
| 100 | |
| 101 int ia32fregs[1]; | |
| 102 int ia32fregv[1]; | |
| 103 | |
| 104 int freg; | |
| 105 int *fregv = ia32fregv; | |
| 106 int *fregs = ia32fregs; | |
| 107 | |
| 61 | 108 |
| 109 #define REG_EAX 0 | |
| 110 #define REG_EBX 1 | |
| 111 #define REG_ECX 2 | |
| 112 #define REG_EDX 3 | |
| 113 #define REG_ESI 4 | |
| 114 #define REG_EDI 5 | |
| 115 #define REG_EBP 6 | |
| 116 #define REG_ESP 7 | |
| 117 | |
| 118 | |
| 119 #define DATA_REG 0 | |
| 120 #define POINTER_REG 3 | |
| 121 static char *reg_name[8]; | |
| 122 static char *reg_name_l[4]; | |
| 123 static char *reg_name_w[4]; | |
| 124 | |
| 93 | 125 static void use_register(int virt, int real, int move); |
| 126 static int virtual(int real); | |
| 127 static void shift(char *op, int reg); | |
| 128 static void ld_indexx(int byte, int n, int xreg); | |
| 129 static void data_mode(char *name); | |
| 130 static int edx_setup(); | |
| 131 static void edx_cleanup(); | |
| 132 static void local_table(void); | |
| 133 static char * fload(int d); | |
| 134 static int code_d1(double d); | |
| 135 static int code_d2(double d); | |
| 94 | 136 static void code_save_stacks(); |
| 107 | 137 static void code_save_fstacks(); |
| 82 | 138 |
| 61 | 139 void |
| 140 code_init(void) | |
| 141 { | |
| 142 arg_offset = 8; | |
| 143 func_disp_offset = -12; | |
| 144 disp_offset = -12; | |
| 145 size_of_int = 4; | |
| 146 endian = 0; | |
| 147 MAX_REGISTER=6; | |
| 148 MAX_DATA_REG=4; | |
| 149 MAX_POINTER=3; | |
| 150 MAX_REGISTER_VAR=2; | |
| 151 | |
| 152 reg_name[REG_EAX] = "%eax"; | |
| 153 reg_name[REG_EBX] = "%ebx"; | |
| 154 reg_name[REG_ECX] = "%ecx"; | |
| 155 reg_name[REG_EDX] = "%edx"; | |
| 156 reg_name[REG_ESI] = "%esi"; | |
| 157 reg_name[REG_EDI] = "%edi"; | |
| 158 reg_name[REG_EBP] = "%ebp"; | |
| 159 reg_name[REG_ESP] = "%esp"; | |
| 160 reg_name_l[REG_EAX] = "%al"; | |
| 161 reg_name_l[REG_EBX] = "%bl"; | |
| 162 reg_name_l[REG_ECX] = "%cl"; | |
| 163 reg_name_l[REG_EDX] = "%dl"; | |
| 164 reg_name_w[REG_EAX] = "%ax"; | |
| 165 reg_name_w[REG_EBX] = "%bx"; | |
| 166 reg_name_w[REG_ECX] = "%cx"; | |
| 167 reg_name_w[REG_EDX] = "%dx"; | |
| 168 | |
| 169 } | |
| 170 | |
| 171 char * | |
| 172 register_name(int i,int byte) | |
| 173 { | |
| 174 if (i<0) { | |
| 175 error(REG_ERR); | |
| 176 return "%eax"; | |
| 177 } | |
| 178 if (byte && rname[i] <= REG_EDX) { | |
| 179 return reg_name_l[rname[i]]; | |
| 180 } else { | |
| 181 return reg_name[rname[i]]; /* should be error */ | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 void | |
| 186 gexpr_code_init(void){ | |
| 187 use_register(creg,REG_EAX,0); | |
| 94 | 188 regv[creg]=0; |
| 61 | 189 regv[dreg]=0; |
| 190 } | |
| 191 | |
| 192 int | |
| 193 register_var(int r) { | |
| 194 return virtual(r+REG_ESI); | |
| 195 } | |
| 196 | |
| 89 | 197 int |
| 198 get_register(void) | |
| 199 { /* 使われていないレジスタを調べる */ | |
| 200 int i; | |
| 201 for(i=0;i<MAX_REGISTER;i++) { | |
| 202 if (! regs[i]) { /* 使われていないなら */ | |
| 203 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 204 return i; /* その場所を表す番号を返す */ | |
| 205 } | |
| 206 } | |
| 207 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 208 } | |
| 209 | |
| 210 void | |
| 211 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 212 regv[i]=regs[i]=0; | |
| 213 } | |
| 214 | |
| 99 | 215 int |
| 126 | 216 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 217 { |
| 126 | 218 if (is_code) { |
| 219 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 220 i = virtual(i+REG_ESI); | |
| 221 regs[i]=regv[i]=1; | |
| 222 return list3(REGISTER,i,(int)nptr); | |
| 223 } else { | |
| 224 return 0; | |
| 225 } | |
| 99 | 226 } |
| 103 | 227 |
| 99 | 228 int |
| 126 | 229 get_input_fregister_var(int i,NMTBL *nptr,int is_code) |
| 99 | 230 { |
| 126 | 231 return 0; |
| 99 | 232 } |
| 233 | |
| 234 int | |
| 235 get_fregister(void) | |
| 236 { | |
| 237 return -1; | |
| 238 } | |
| 239 | |
| 240 void | |
| 241 free_fregister(int i) { | |
| 242 error(-1); | |
| 243 } | |
| 244 | |
| 89 | 245 int |
| 246 register_full(void) | |
| 247 { | |
| 248 int i; | |
| 249 for(i=0;i<MAX_REGISTER;i++) { | |
| 250 if (! regs[i]) { | |
| 251 return 0; | |
| 252 } | |
| 253 } | |
| 254 return 1; | |
| 255 } | |
| 256 | |
| 257 int | |
| 137 | 258 free_register_count(int d) |
| 89 | 259 { |
| 260 int i,count; | |
| 261 count = 0; | |
| 262 for(i=0;i<MAX_REGISTER;i++) { | |
| 263 if (! regs[i] && ! regv[i]) count++; | |
| 264 } | |
| 137 | 265 return d?0:count; |
| 89 | 266 } |
| 267 | |
| 268 void | |
| 269 free_all_register(void) | |
| 270 { | |
| 271 int i; | |
| 272 for(i=0;i<MAX_REGISTER;i++) { | |
| 273 regs[i]=regv[i]=0; | |
| 274 } | |
| 275 creg = get_register(); | |
| 276 dreg = get_register(); | |
| 277 return; | |
| 278 } | |
| 279 | |
| 280 | |
| 281 void | |
| 282 register_usage(char *s) | |
| 283 { | |
| 284 int i; | |
| 285 if (chk) return; | |
| 286 printf("# %d: %s:",lineno,s); | |
| 287 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 288 for(i=0;i<MAX_REGISTER;i++) { | |
| 289 printf("%d",regs[i]); | |
| 290 } | |
| 291 printf(":"); | |
| 292 for(i=0;i<MAX_REGISTER;i++) { | |
| 293 printf("%d",regv[i]); | |
| 294 } | |
| 295 #if 0 | |
| 296 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 297 for(i=reg_sp;i>=0;i--) { | |
| 298 if(reg_stack[i]>=0) | |
| 299 printf(" %s",register_name(reg_stack[i],0)); | |
| 300 } | |
| 301 #endif | |
| 94 | 302 printf(" f:%d",freg_sp); |
| 89 | 303 printf("\n"); |
| 304 } | |
| 305 | |
| 109 | 306 void |
| 137 | 307 code_arg_register(NMTBL *fnptr) |
| 109 | 308 { |
| 137 | 309 int args = fnptr->dsp; |
| 310 NMTBL *n; | |
| 311 int reg_var = 0; | |
| 312 int freg_var = 0; | |
| 313 int type; | |
| 314 int reg; | |
| 315 int is_code0 = is_code(fnptr); | |
| 316 | |
| 317 while (args) { | |
| 318 /* process in reverse order */ | |
| 319 n = (NMTBL*)caddr(args); | |
| 320 type = n->ty; | |
| 321 if (scalar(type)) { | |
| 322 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 323 n->sc = REGISTER; | |
| 324 n->dsp = cadr(reg); | |
| 325 regv[n->dsp]= 1; | |
| 326 regs[n->dsp]= INPUT_REG; | |
| 327 reg_var++; | |
| 328 cadddr(args)=size_of_int; /* why we need this? */ | |
| 329 } | |
| 330 } else if (type==FLOAT||type==DOUBLE) { | |
| 331 if ((reg = get_input_fregister_var(freg_var,n,is_code0))) { | |
| 332 n->sc = DREGISTER; | |
| 333 n->dsp = cadr(reg); | |
| 334 fregv[n->dsp]= 1; | |
| 335 fregs[n->dsp]= INPUT_REG; | |
| 336 freg_var++; | |
| 337 cadddr(args)=size(type); /* why we need this? */ | |
| 338 } | |
| 339 } | |
| 340 args = cadr(args); | |
| 341 } | |
| 109 | 342 } |
| 343 | |
| 89 | 344 void |
| 345 gexpr_init(void) | |
| 346 { | |
| 347 while(reg_sp > 0) { | |
| 94 | 348 if (reg_stack[--reg_sp]>=0) |
| 349 free_register(reg_stack[reg_sp]); | |
| 89 | 350 } |
| 94 | 351 freg_sp = 0; |
| 89 | 352 text_mode(); |
| 353 gexpr_code_init(); | |
| 354 register_usage("gexpr_init"); | |
| 355 } | |
| 356 | |
| 357 | |
| 358 void | |
| 359 emit_init(void) | |
| 360 { | |
| 361 int i; | |
| 362 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 363 free_all_register(); | |
| 364 reg_sp = 0; | |
| 94 | 365 freg_sp = 0; |
| 89 | 366 text_mode(); |
| 367 } | |
| 368 | |
| 369 int | |
| 370 virtual(int real) | |
| 371 { | |
| 372 int real_v,i; | |
| 373 real_v = -1; | |
| 374 for(i=0;i<MAX_REGISTER;i++) { | |
| 375 if (rname[i]==real) { | |
| 376 real_v=i; | |
| 377 break; | |
| 378 } | |
| 379 } | |
| 380 return real_v; | |
| 381 } | |
| 382 | |
| 383 int | |
| 384 pop_register(void) | |
| 385 { /* レジスタから値を取り出す */ | |
| 386 return reg_stack[--reg_sp]; | |
| 387 } | |
| 388 | |
| 389 void | |
| 390 emit_pop_free(int xreg) | |
| 391 { | |
| 392 if (xreg==dreg) { | |
| 393 regv[dreg]=0; | |
| 98 | 394 } else if (xreg>=0) { |
| 89 | 395 free_register(xreg); |
| 396 } | |
| 397 } | |
| 398 | |
| 399 | |
| 61 | 400 int |
| 105 | 401 get_register_var(NMTBL *nptr) |
| 61 | 402 { |
| 403 int i; | |
| 404 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 405 if (! regs[i]) { /* 使われていないなら */ | |
| 406 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 407 regv[i]=0; | |
| 105 | 408 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 409 } |
| 410 } | |
| 104 | 411 return list2(LVAR,new_lvar(size_of_int)); |
| 412 } | |
| 413 | |
| 414 int | |
| 105 | 415 get_fregister_var(NMTBL *nptr) |
| 104 | 416 { |
| 417 return list2(LVAR,new_lvar(size_of_double)); | |
| 61 | 418 } |
| 419 | |
| 137 | 420 int |
| 421 get_dregister_var(NMTBL *nptr) | |
| 422 { | |
| 423 return get_fregister_var(nptr); | |
| 424 } | |
| 425 | |
| 61 | 426 void |
| 427 use_register(int virt, int real, int move) | |
| 428 { | |
| 429 int real_v; | |
| 430 char *move_op; | |
| 431 if (rname[virt]==real) | |
| 432 return; | |
| 433 real_v = virtual(real); | |
| 434 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 435 if (move || (regv[real_v])) { | |
| 436 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 437 } | |
| 438 rname[real_v] = rname[virt]; | |
| 439 rname[virt] = real; | |
| 440 } | |
| 441 | |
| 442 void | |
| 443 use_pointer(int virt, int move) | |
| 444 { | |
| 445 int i; | |
| 446 if (rname[virt]>=POINTER_REG) | |
| 447 return; | |
| 448 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 449 if (!regs[virtual(i)]) { | |
| 450 use_register(virt,i,move); | |
| 451 return; | |
| 452 } | |
| 453 } | |
| 454 /* we prefer EBX */ | |
| 455 use_register(virt,REG_EBX,move); | |
| 456 } | |
| 457 | |
| 458 void | |
| 459 use_data_reg(int virt, int move) | |
| 460 { | |
| 461 int i; | |
| 462 if (rname[virt]<MAX_DATA_REG) | |
| 463 return; | |
| 464 for(i=0;i<MAX_DATA_REG;i++) { | |
| 465 if (!regs[virtual(i)]) { | |
| 466 use_register(virt,i,move); | |
| 467 return; | |
| 468 } | |
| 469 } | |
| 470 /* we prefer EBX */ | |
| 471 use_register(virt,REG_EBX,move); | |
| 472 } | |
| 473 | |
| 474 | |
| 475 void | |
| 107 | 476 emit_push() |
| 61 | 477 { |
| 478 int new_reg; | |
| 479 new_reg = get_register(); | |
| 480 if(new_reg<0) { /* もうレジスタがない */ | |
| 83 | 481 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 482 reg_stack[reg_sp++] = -1; |
| 483 printf("\tpushl %s\n",register_name(creg,0)); | |
| 484 /* creg is used soon, don't regv[creg]=0 */ | |
| 485 } else { | |
| 486 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 487 creg = new_reg; | |
| 488 regv[creg]=1; | |
| 489 } | |
| 490 } | |
| 491 | |
| 492 int | |
| 493 emit_pop(int type) | |
| 494 { | |
| 495 int xreg; | |
| 496 if ((xreg=pop_register())==-1) { | |
| 497 if (type==POINTER_REG) | |
| 498 use_pointer(dreg,0); | |
| 499 else if (type==DATA_REG) | |
| 500 use_data_reg(dreg,0); | |
| 501 if (regv[dreg]) { | |
| 502 printf("# emit_pop dreg conflict\n"); | |
| 94 | 503 error(-1); |
| 61 | 504 } |
| 505 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 506 regv[dreg]=1; |
| 507 return dreg; | |
| 508 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 509 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 510 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 511 regv[dreg]=1; |
| 512 return dreg; | |
| 513 } | |
| 61 | 514 return xreg; |
| 515 } | |
| 516 | |
| 92 | 517 void |
| 518 code_label(int labelno) | |
| 519 { | |
| 520 printf("_%d:\n",labelno); | |
| 521 } | |
| 61 | 522 |
| 523 void | |
| 107 | 524 code_gvar(int e1,int creg) { |
| 109 | 525 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 526 regv[creg]=1; |
| 61 | 527 } |
| 528 | |
| 529 | |
| 530 void | |
| 107 | 531 code_rgvar(int e1,int creg) { |
| 109 | 532 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 533 regv[creg]=1; |
| 61 | 534 } |
| 535 | |
| 536 void | |
| 107 | 537 code_crgvar(int e1,int creg){ |
| 109 | 538 printf("\tmovsbl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 539 regv[creg]=1; |
| 61 | 540 } |
| 541 | |
| 542 | |
| 543 void | |
| 107 | 544 code_lvar(int e2,int creg) { |
| 119 | 545 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 546 regv[creg]=1; |
| 61 | 547 } |
| 548 | |
| 549 | |
| 550 void | |
| 107 | 551 code_register(int e2,int creg) { |
| 61 | 552 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 553 regv[creg]=1; |
| 61 | 554 } |
| 555 | |
| 556 | |
| 557 void | |
| 94 | 558 code_rlvar(int e2,int reg) { |
| 119 | 559 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 560 regv[creg]=1; |
| 61 | 561 } |
| 562 | |
| 563 | |
| 564 void | |
| 94 | 565 code_crlvar(int e2,int reg) { |
| 119 | 566 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 567 regv[creg]=1; |
| 61 | 568 } |
| 569 | |
| 570 | |
| 571 void | |
| 109 | 572 code_fname(NMTBL *n,int creg) { |
| 573 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 574 regv[creg]=1; |
| 61 | 575 } |
| 576 | |
| 577 | |
| 578 void | |
| 107 | 579 code_const(int e2,int creg) { |
| 61 | 580 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 581 regv[creg]=1; |
| 61 | 582 } |
| 583 | |
| 584 | |
| 585 void | |
| 107 | 586 code_neg(int creg) { |
| 61 | 587 printf("\tnegl %s\n", register_name(creg,0)); |
| 588 } | |
| 589 | |
| 590 | |
| 591 void | |
| 107 | 592 code_not(int creg) { |
| 61 | 593 printf("\tnotl %s\n", register_name(creg,0)); |
| 594 } | |
| 595 | |
| 596 | |
| 597 void | |
| 107 | 598 code_lnot(int creg) { |
| 61 | 599 char *xrn; |
| 600 use_data_reg(creg,1); | |
| 601 xrn = register_name(creg,1); | |
| 602 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 603 printf("\tsete %s\n", xrn); | |
| 604 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 605 } | |
| 606 | |
| 607 void | |
| 107 | 608 code_preinc(int e1,int e2,int reg) { |
| 61 | 609 char *xrn; |
| 610 if (car(e2)==REGISTER) { | |
| 611 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 107 | 612 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 613 regv[reg]=1; | |
| 61 | 614 return; |
| 615 } | |
| 616 g_expr(e2); | |
| 617 xrn = register_name(creg,0); | |
| 618 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 619 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 620 } | |
| 621 | |
| 622 | |
| 623 void | |
| 107 | 624 code_postinc(int e1,int e2,int reg) { |
| 61 | 625 char *xrn; |
| 626 if (car(e2)==REGISTER) { | |
| 107 | 627 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 61 | 628 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 629 regv[reg]=1; |
| 61 | 630 return; |
| 631 } | |
| 632 g_expr(e2); | |
| 633 emit_push(); | |
| 634 xrn = register_name((e2=emit_pop(0)),0); | |
| 635 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); | |
| 636 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 637 emit_pop_free(e2); | |
| 638 } | |
| 639 | |
| 640 | |
| 641 void | |
| 107 | 642 code_cpostinc(int e1,int e2,int reg) { |
| 61 | 643 char *xrn; |
| 644 if (car(e2)==REGISTER) { | |
| 89 | 645 printf("\tmovbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 646 register_name(reg,0)); |
| 61 | 647 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 648 regv[reg]=1; |
| 61 | 649 return; |
| 650 } | |
| 651 g_expr(e2); | |
| 652 emit_push(); | |
| 653 xrn = register_name((e2=emit_pop(0)),1); | |
| 654 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); | |
| 655 printf("\tincl (%s)\n",xrn); | |
| 656 emit_pop_free(e2); | |
| 657 } | |
| 658 | |
| 659 | |
| 660 void | |
| 107 | 661 code_cpreinc(int e1,int e2,int reg) { |
| 61 | 662 if (car(e2)==REGISTER) { |
| 663 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 89 | 664 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 665 register_name(reg,0)); |
| 666 regv[reg]=1; | |
| 61 | 667 return; |
| 668 } | |
| 669 g_expr(e2); | |
| 670 printf("\tincl (%s)\n",register_name(creg,0)); | |
| 671 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 672 } | |
| 673 | |
| 674 | |
| 675 void | |
| 107 | 676 code_cpostdec(int e1,int e2,int reg) { |
| 61 | 677 if (car(e2)==REGISTER) { |
| 89 | 678 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 679 register_name(reg,0)); |
| 61 | 680 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 107 | 681 regv[reg]=1; |
| 61 | 682 return; |
| 683 } | |
| 684 g_expr(e2); | |
| 685 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 686 printf("\tdecl (%s)\n",register_name(creg,0)); | |
| 687 } | |
| 688 | |
| 689 | |
| 690 void | |
| 107 | 691 code_cpredec(int e1,int e2,int reg) { |
| 61 | 692 if (car(e2)==REGISTER) { |
| 693 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 89 | 694 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 695 register_name(reg,0)); |
| 696 regv[reg]=1; | |
| 697 return; | |
| 61 | 698 } |
| 699 g_expr(e2); | |
| 700 emit_push(); | |
| 701 e2 = emit_pop(0); | |
| 702 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 703 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); | |
| 704 emit_pop_free(e2); | |
| 705 } | |
| 706 | |
| 707 | |
| 708 void | |
| 107 | 709 code_return(int creg) { |
| 61 | 710 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 711 regv[creg]=1; |
| 61 | 712 } |
| 713 | |
| 714 | |
| 715 void | |
| 107 | 716 code_environment(int creg) { |
| 61 | 717 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 718 regv[creg]=1; |
| 61 | 719 } |
| 720 | |
| 721 | |
| 722 void | |
| 116 | 723 code_bool(int e1) { |
| 61 | 724 char *xrn; |
| 725 int e2,e3; | |
| 726 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 727 xrn = register_name(creg,0); | |
| 728 printf("\txorl %s,%s\n",xrn,xrn); | |
| 729 jmp(e3=fwdlabel()); | |
| 730 fwddef(e2); | |
| 731 printf("\tmovl $1,%s\n",xrn); | |
| 732 fwddef(e3); | |
| 107 | 733 regv[creg]=1; |
| 61 | 734 } |
| 735 | |
| 736 char * | |
| 737 code_gt(int cond) { | |
| 738 return (cond?"g":"le"); | |
| 739 } | |
| 740 | |
| 741 char * | |
| 742 code_ugt(int cond) { | |
| 743 return (cond?"a":"be"); | |
| 744 } | |
| 745 | |
| 746 char * | |
| 747 code_ge(int cond) { | |
| 748 return (cond?"ge":"l"); | |
| 749 } | |
| 750 | |
| 751 char * | |
| 752 code_uge(int cond) { | |
| 753 return (cond?"ae":"b"); | |
| 754 } | |
| 755 | |
| 756 char * | |
| 757 code_eq(int cond) { | |
| 758 return (cond?"e":"ne"); | |
| 759 } | |
| 760 | |
| 761 void | |
| 762 code_cmp_crgvar(int e1) { | |
| 109 | 763 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 764 } |
| 765 | |
| 766 | |
| 767 void | |
| 768 code_cmp_crlvar(int e1) { | |
| 119 | 769 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 770 } |
| 771 | |
| 772 | |
| 773 void | |
| 774 code_cmp_rgvar(int e1) { | |
| 109 | 775 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 776 } |
| 777 | |
| 778 | |
| 779 void | |
| 780 code_cmp_rlvar(int e1) { | |
| 119 | 781 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 782 } |
| 783 | |
| 784 | |
| 785 void | |
| 786 code_cmp_register(int e2) { | |
| 787 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 788 } | |
| 789 | |
| 790 | |
| 791 void | |
| 792 ascii(char *s) | |
| 793 { | |
| 794 printf("\t.string \""); | |
| 795 while(*s) { | |
| 796 if (*s=='\n') | |
| 797 printf("%cn",92); | |
| 798 else if (*s<' ') | |
| 799 printf("%c%03o",92,*s); | |
| 800 else if (*s==34) | |
| 801 printf("%c%c",92,34); | |
| 802 else | |
| 803 printf("%c",*s); | |
| 804 s++; | |
| 805 } | |
| 806 printf("%c\n",34); | |
| 807 } | |
| 808 | |
| 809 void | |
| 107 | 810 code_string(int e1,int creg) |
| 61 | 811 { |
| 812 char *s; | |
| 813 int i,lb; | |
| 814 | |
| 815 if (0) { | |
| 816 s=(char *)cadr(e1); | |
| 817 lb=fwdlabel(); | |
| 818 printf("\tjmp _%d\n",lb); | |
| 819 i=backdef(); | |
| 820 ascii(s); | |
| 821 printf("\t.align 2\n"); | |
| 822 fwddef(lb); | |
| 823 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 824 } else { | |
| 825 s=(char *)cadr(e1); | |
| 826 printf(".section\t.rodata\n"); | |
| 827 lb=fwdlabel(); | |
| 828 printf("_%d:\n",lb); | |
| 829 ascii(s); | |
| 830 if (output_mode==TEXT_EMIT_MODE) { | |
| 831 printf(".text\n"); | |
| 832 } else { | |
| 833 text_mode(); | |
| 834 } | |
| 835 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 836 } | |
| 837 } | |
| 838 | |
| 839 #define MAX_COPY_LEN 20 | |
| 840 | |
| 841 void | |
| 842 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 843 { | |
| 844 int fix = 0; | |
| 845 /* length <0 means upward direction copy */ | |
| 846 switch (length) { | |
| 847 case 0: break; | |
| 848 case 1: case -1: | |
| 849 printf("\tmovb %d(%s),%s\n",offset, | |
| 850 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 851 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 852 register_name(to,0)); | |
| 853 break; | |
| 854 case 2: case -2: | |
| 855 printf("\tmovw %d(%s),%s\n",offset, | |
| 856 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 857 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 858 register_name(to,0)); | |
| 859 break; | |
| 860 case 4: case -4: | |
| 861 printf("\tmovl %d(%s),%s\n",offset, | |
| 862 register_name(from,0), register_name(dreg,0)); | |
| 863 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 864 register_name(to,0)); | |
| 865 break; | |
| 866 default: | |
| 867 if (-MAX_COPY_LEN<length && length <0) { | |
| 868 for(;length<=4;length+=4,offset-=4) | |
| 869 emit_copy(from,to,4,offset,0,det); | |
| 870 for(;length<=2;length+=2,offset-=2) | |
| 871 emit_copy(from,to,2,offset,0,det); | |
| 872 if(length>0) | |
| 873 emit_copy(from,to,length,offset,0,det); | |
| 874 break; | |
| 875 } else if (length <=MAX_COPY_LEN) { | |
| 876 for(;length>=4;length-=4,offset+=4) | |
| 877 emit_copy(from,to,4,offset,0,det); | |
| 878 for(;length>=2;length-=2,offset+=2) | |
| 879 emit_copy(from,to,2,offset,0,det); | |
| 880 if(length>0) | |
| 881 emit_copy(from,to,length,offset,0,det); | |
| 882 break; | |
| 883 } | |
| 884 if (det) { | |
| 885 /* | |
| 886 call bcopy | |
| 887 g_expr(list3(FUNCTION,,); | |
| 888 break; | |
| 889 */ | |
| 890 } | |
| 891 use_register(from,REG_ESI,1); | |
| 892 use_register(to, REG_EDI,1); | |
| 893 use_register(dreg,REG_ECX,0); | |
| 894 if (length<0) { | |
| 895 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 896 printf("\taddl $%d,%%esi\n",-length); | |
| 897 printf("\taddl $%d,%%edi\n",-length); | |
| 898 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 899 if(length%4) { | |
| 900 emit_copy(from,to,length,offset+length/4,0,det); | |
| 901 } | |
| 902 } else { | |
| 903 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 904 fix = (length/4)*4; | |
| 905 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 906 if(length%4) { | |
| 907 emit_copy(from,to,length,offset+length/4,0,det); | |
| 908 } | |
| 909 } | |
| 910 } | |
| 911 if (value) { | |
| 912 /* creg must point top of the destination data */ | |
| 913 /* this code is necessary for the value of assignment or function call */ | |
| 914 /* otherwise we don't need this */ | |
| 915 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 916 if(creg!=to) { | |
| 917 if (to==dreg) | |
| 918 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 919 else { | |
| 920 free_register(creg); creg=to; | |
| 921 } | |
| 922 } | |
| 923 } | |
| 924 regv[from]=regv[to]=regv[dreg]=0; | |
| 925 regv[creg]=1; | |
| 926 } | |
| 927 | |
| 928 int | |
| 929 struct_push(int e4,int t) | |
| 930 { | |
| 81 | 931 int length,xreg,save,lreg,count; |
| 61 | 932 g_expr(e4); |
| 933 length=size(t); | |
| 934 if(length%size_of_int) { | |
| 935 length += size_of_int - (length%size_of_int); | |
| 936 } | |
| 81 | 937 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 938 if (length==0) return count; | |
| 939 else { | |
| 940 printf("\tpushl %d(%s)\n", | |
| 941 length-size_of_int,register_name(creg,0)); | |
| 942 } | |
| 61 | 943 } |
| 944 printf("\tsubl $%d,%%esp\n",length); | |
| 945 if (register_full()) { | |
| 946 save = 1; | |
| 947 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 948 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 949 xreg = lreg; regv[xreg]=0; | |
| 950 } else { | |
| 951 save=0; | |
| 952 xreg = get_register(); | |
| 953 } | |
| 954 if (save) | |
| 955 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 956 else | |
| 957 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 958 regv[xreg]=1; | |
| 959 /* downward direction copy */ | |
| 960 emit_copy(creg,xreg,length,0,0,1); | |
| 961 /* we have value in creg, it may be changed */ | |
| 962 if (save) { | |
| 963 if(creg==xreg) { | |
| 964 creg = get_register(); /* creg is freed in emit_copy */ | |
| 965 } | |
| 966 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 967 regv[xreg]=1; | |
| 968 } else | |
| 969 free_register(xreg); | |
| 970 return length/size_of_int; | |
| 971 } | |
| 972 | |
| 94 | 973 int |
| 61 | 974 function(int e1) |
| 975 { | |
| 127 | 976 int e2,e3,e4,nargs,t,ret_type; |
| 977 NMTBL *n=0; | |
| 61 | 978 int save,saved; |
|
136
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979 ret_type = cadr(cadddr(e1)); |
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069960078249
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980 if (ret_type==CHAR) ret_type=INT; |
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changeset
|
981 |
| 94 | 982 #ifdef SAVE_STACKS |
| 983 code_save_stacks(); | |
| 984 #endif | |
| 137 | 985 if (free_register_count(0)<1) { |
| 61 | 986 for(save = 0;save==dreg||save==creg;save++); |
| 987 printf("\tpushl %s\n",register_name(save,0)); | |
| 988 saved = 1; | |
| 989 } else { | |
| 990 save = get_register(); | |
| 991 saved = 0; | |
| 992 } | |
| 993 regv[save]=0; | |
| 994 e2 = cadr(e1); | |
| 995 nargs = 0; | |
| 996 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 997 t=caddr(e3); | |
| 127 | 998 e4 = car(e3); |
| 61 | 999 if(scalar(t)) { |
| 1000 g_expr(e4); | |
| 1001 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1002 } else if (t==DOUBLE) { |
| 1003 g_expr(e4); | |
| 1004 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1005 nargs += size_of_double/size_of_int; |
| 83 | 1006 fregv[freg]=0; |
| 82 | 1007 continue; |
| 1008 } else if (t==FLOAT) { | |
| 1009 g_expr(e4); | |
| 1010 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1011 nargs += size_of_float/size_of_int; |
| 83 | 1012 fregv[freg]=0; |
| 82 | 1013 continue; |
| 61 | 1014 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1015 nargs += struct_push(e4,t); | |
| 1016 continue; | |
| 1017 } else { | |
| 1018 error(TYERR); | |
| 1019 } | |
| 1020 ++nargs; | |
| 1021 } | |
| 1022 if (car(e2) == FNAME) { | |
| 1023 n=(NMTBL *)cadr(e2); | |
| 78 | 1024 regv[creg]=0; |
| 1025 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1026 } else { |
| 1027 g_expr(e2); | |
| 78 | 1028 regv[creg]=1; |
| 1029 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1030 } |
| 1031 | |
| 1032 /* we don't have to save creg nor dreg */ | |
| 1033 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1034 regv[dreg]= regv[save]= 0; |
| 61 | 1035 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1036 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1037 regs[creg]=1; regs[dreg]=1; | |
| 1038 | |
| 1039 if (car(e2) == FNAME) { | |
| 1040 printf("\tcall\t%s\n",n->nm); | |
| 1041 } else { | |
| 1042 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1043 } | |
| 1044 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1045 if (saved) { | |
| 1046 printf("\tpopl %s\n",register_name(save,0)); | |
| 1047 } else { | |
| 1048 free_register(save); | |
| 1049 } | |
| 1050 regv[save]=0; | |
| 105 | 1051 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1052 fregv[freg]=1; regv[creg]=0; |
| 105 | 1053 } else if (ret_type==VOID) { |
| 94 | 1054 fregv[freg]=0; regv[creg]=0; |
| 1055 } else { | |
| 1056 fregv[freg]=0; regv[creg]=1; | |
| 1057 } | |
| 105 | 1058 return ret_type; |
| 61 | 1059 } |
| 1060 | |
| 1061 void | |
| 1062 code_frame_pointer(int e3) { | |
| 1063 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1064 } | |
| 1065 | |
| 1066 | |
| 1067 void | |
| 62 | 1068 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1069 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1070 } | |
| 1071 | |
| 1072 | |
| 1073 void | |
| 1074 code_jmp(char *s) { | |
| 1075 printf("\tjmp %s\n",s); | |
| 1076 } | |
| 1077 | |
| 1078 | |
| 1079 void | |
| 1080 code_indirect_jmp(int e2) { | |
| 1081 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1082 } | |
| 1083 | |
| 94 | 1084 int |
| 61 | 1085 rindirect(int e1) /* *(p +5 ) */ |
| 1086 { | |
| 1087 char *op; | |
| 94 | 1088 int e2,e3,byte,t; |
| 61 | 1089 e3 = cadr(e2 = cadr(e1)); |
| 1090 g_expr(e2); | |
| 82 | 1091 switch (car(e1)) { |
| 1092 case FRINDIRECT: case DRINDIRECT: | |
| 1093 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); | |
| 94 | 1094 t=DOUBLE; |
| 82 | 1095 break; |
| 127 | 1096 case CRINDIRECT: case RINDIRECT: default: |
| 82 | 1097 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); |
| 61 | 1098 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1099 t=byte?CHAR:INT; |
| 82 | 1100 } |
| 94 | 1101 return t; |
| 61 | 1102 } |
| 1103 | |
| 1104 char * | |
| 1105 move(int byte) | |
| 1106 { | |
| 1107 return byte?"movb":"movl"; | |
| 1108 } | |
| 1109 | |
| 1110 void | |
| 103 | 1111 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1112 if (byte) use_data_reg(creg,1); |
| 109 | 1113 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1114 } |
| 1115 | |
| 1116 void | |
| 103 | 1117 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1118 if (byte) use_data_reg(creg,1); |
| 119 | 1119 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1120 } |
| 1121 | |
| 1122 void | |
| 111 | 1123 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1124 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1125 } | |
| 1126 | |
| 1127 void | |
| 118 | 1128 code_assign(int e2,int byte,int creg) { |
| 95 | 1129 if (byte) use_data_reg(creg,1); |
| 61 | 1130 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 1131 } | |
| 1132 | |
| 1133 | |
| 1134 void | |
| 1135 code_register_assop(int e2,int op,int byte) { | |
| 1136 int reg; | |
| 1137 int xreg = creg; | |
| 1138 creg = reg = e2; | |
| 1139 tosop(op,xreg); | |
| 1140 creg = xreg; | |
| 1141 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 1142 } | |
| 1143 | |
| 1144 | |
| 1145 void | |
| 1146 code_assop(int op,int byte) { | |
| 1147 char *xrn; | |
| 1148 int xreg; | |
| 1149 int edx = edx_setup(); | |
| 1150 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1151 regv[xreg]=regs[xreg]=1; | |
| 1152 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1153 regv[edx]=1; | |
| 1154 ld_indexx(byte,0,edx); | |
| 1155 tosop(op,xreg); | |
| 1156 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); | |
| 1157 edx_cleanup(); | |
| 1158 emit_pop_free(xreg); | |
| 1159 } | |
| 1160 | |
| 1161 | |
| 1162 void | |
| 1163 tosop(int op,int oreg) | |
| 1164 { | |
| 1165 int dx; | |
| 1166 char *orn,*crn; | |
| 1167 | |
| 1168 switch(op) { | |
| 1169 case LSHIFT: | |
| 1170 case ULSHIFT: | |
| 1171 shift("sall",oreg); | |
| 1172 return; | |
| 1173 case RSHIFT: | |
| 1174 shift("sarl",oreg); | |
| 1175 return; | |
| 1176 case URSHIFT: | |
| 1177 shift("shrl",oreg); | |
| 1178 return; | |
| 1179 } | |
| 1180 if(oreg==-1) { | |
| 1181 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1182 oreg = dreg; | |
| 1183 regv[dreg]=1; | |
| 94 | 1184 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1185 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1186 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1187 oreg = dreg; |
| 1188 regv[dreg]=1; | |
| 61 | 1189 } |
| 1190 regv[oreg]=1; regs[oreg]=1; | |
| 1191 orn = register_name(oreg,0); | |
| 1192 crn = register_name(creg,0); | |
| 1193 switch(op) { | |
| 1194 case ADD: | |
| 1195 printf("\taddl %s,%s\n",orn,crn); | |
| 1196 break; | |
| 89 | 1197 case SUB: case CMP: |
| 61 | 1198 printf("\tsubl %s,%s\n",orn,crn); |
| 1199 break; | |
| 1200 case BAND: | |
| 1201 printf("\tandl %s,%s\n",orn,crn); | |
| 1202 break; | |
| 1203 case EOR: | |
| 1204 printf("\txorl %s,%s\n",orn,crn); | |
| 1205 break; | |
| 1206 case BOR: | |
| 1207 printf("\torl %s,%s\n",orn,crn); | |
| 1208 break; | |
| 1209 case MUL: | |
| 1210 case UMUL: | |
| 1211 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1212 break; | |
| 1213 case DIV: | |
| 1214 case UDIV: | |
| 1215 use_register(creg,REG_EAX,1); | |
| 1216 edx_setup(); | |
| 1217 orn = register_name(oreg,0); | |
| 1218 if (op==DIV) | |
| 127 | 1219 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1220 else |
| 127 | 1221 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1222 edx_cleanup(); |
| 1223 break; | |
| 1224 case MOD: | |
| 1225 case UMOD: | |
| 1226 use_register(creg,REG_EAX,1); | |
| 1227 edx_setup(); | |
| 1228 orn = register_name(oreg,0); | |
| 1229 if (op==DIV) | |
| 127 | 1230 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1231 else |
| 127 | 1232 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1233 dx = virtual(REG_EDX); |
| 1234 if (dx!=creg) { | |
| 1235 rname[dx]=rname[creg]; | |
| 1236 rname[creg]=REG_EDX; | |
| 1237 } | |
| 1238 edx_cleanup(); | |
| 1239 break; | |
| 1240 } | |
| 1241 if (oreg!=dreg&&oreg>=0) | |
| 1242 free_register(oreg); | |
| 94 | 1243 else if (oreg==dreg) regv[dreg]=0; |
| 61 | 1244 } |
| 1245 | |
| 1246 static int edx_stack=0; | |
| 1247 | |
| 1248 int | |
| 1249 edx_setup() | |
| 1250 { | |
| 1251 int edx_save; | |
| 1252 /* make real EDX register empty */ | |
| 137 | 1253 if (free_register_count(0)<1) { |
| 61 | 1254 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1255 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1256 edx_stack = list3(edx_save,edx_stack,0); | |
| 1257 } else { | |
| 1258 edx_save = get_register(); | |
| 1259 edx_stack = list3(edx_save,edx_stack,1); | |
| 1260 } | |
| 1261 regv[edx_save]=0; | |
| 1262 use_register(edx_save,REG_EDX,0); | |
| 1263 return edx_save; | |
| 1264 } | |
| 1265 | |
| 1266 | |
| 1267 void | |
| 1268 edx_cleanup() | |
| 1269 { | |
| 1270 if (caddr(edx_stack)==0) { | |
| 1271 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1272 } else | |
| 1273 free_register(car(edx_stack)); | |
| 1274 edx_stack = cadr(edx_stack); | |
| 1275 } | |
| 1276 | |
| 1277 void | |
| 1278 shift(char *op, int reg) | |
| 1279 { | |
| 1280 if (reg>=0) { | |
| 1281 use_register(reg,REG_ECX,1); | |
| 103 | 1282 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1283 use_register(dreg,REG_ECX,0); | |
| 119 | 1284 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1285 reg = dreg; |
| 1286 regv[dreg]=0; | |
| 61 | 1287 } else { |
| 1288 use_register(dreg,REG_ECX,0); | |
| 1289 printf("\tpopl %%ecx\n"); | |
| 103 | 1290 regv[dreg]=0; |
| 61 | 1291 } |
| 1292 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1293 } | |
| 1294 | |
| 1295 void | |
| 1296 ld_indexx(int byte, int n, int xreg) | |
| 1297 { | |
| 1298 char *op; | |
| 1299 | |
| 1300 op = byte ? "movsbl" : "movl"; | |
| 1301 if (n) | |
| 95 | 1302 printf("\t%s %d(%s),%s\n",op,n, |
| 1303 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1304 else |
| 95 | 1305 printf("\t%s (%s),%s\n",op, |
| 1306 register_name(xreg,0),register_name(creg,byte)); | |
| 1307 } | |
| 1308 | |
| 1309 int | |
| 1310 code_csvalue() | |
| 1311 { | |
| 123 | 1312 return rname[creg]; /* for switch value */ |
| 61 | 1313 } |
| 1314 | |
| 1315 void | |
| 95 | 1316 code_cmpdimm(int e, int csreg) |
| 61 | 1317 { |
| 1318 /* used in dosiwtch() */ | |
| 66 | 1319 if(chk) return; |
| 123 | 1320 use_register(creg,csreg,0); |
| 61 | 1321 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1322 } | |
| 1323 | |
| 1324 void | |
| 66 | 1325 code_opening(char *filename) |
| 61 | 1326 { |
| 1327 printf("\t.file \"%s\"\n",filename); | |
| 1328 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1329 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1330 printf(".text\n"); |
| 1331 } | |
| 1332 | |
| 1333 void | |
| 66 | 1334 code_closing() |
| 61 | 1335 { |
| 78 | 1336 global_table(); |
| 61 | 1337 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1338 } | |
| 1339 | |
| 1340 void | |
| 89 | 1341 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1342 { |
| 89 | 1343 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1344 printf("\tj%s\t_%d\n",s,l1); |
| 1345 } | |
| 1346 | |
| 82 | 1347 |
| 1348 void | |
| 61 | 1349 jcond(int l, char cond) |
| 1350 { | |
| 66 | 1351 if (chk) return; |
| 61 | 1352 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1353 } | |
| 1354 | |
| 1355 void | |
| 1356 jmp(int l) | |
| 1357 { | |
| 1358 control=0; | |
| 66 | 1359 if (chk) return; |
| 61 | 1360 printf("\tjmp\t_%d\n",l); |
| 1361 /* align? */ | |
| 1362 /* | |
| 1363 this is not allowed because of ? operator | |
| 1364 regv[creg]=regv[dreg]=0; | |
| 1365 use_register(creg,REG_EAX,0); | |
| 1366 use_register(dreg,REG_EBX,0); | |
| 1367 */ | |
| 1368 } | |
| 1369 | |
| 1370 void | |
| 1371 gen_comment(char *s) | |
| 1372 { | |
| 66 | 1373 if (chk) return; |
| 1374 printf("## %s",s); | |
| 61 | 1375 } |
| 1376 | |
| 1377 | |
| 1378 void | |
| 1379 code_enter(char *name) | |
| 1380 { | |
| 1381 printf("\t.align 4\n"); | |
| 1382 if (stmode!=STATIC) | |
| 1383 printf(".globl %s\n",name); | |
| 1384 printf("\t.type\t%s,@function\n",name); | |
| 1385 printf("%s:\n",name); | |
| 1386 } | |
| 1387 | |
| 77 | 1388 |
| 61 | 1389 void |
| 1390 code_enter1(int args) | |
| 1391 { | |
| 1392 code_disp_label=fwdlabel(); | |
| 1393 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1394 | |
| 1395 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1396 } | |
| 1397 | |
| 1398 void | |
| 1399 code_leave(char *name) | |
| 1400 { | |
| 63 | 1401 disp&= -size_of_int; |
| 61 | 1402 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1403 printf("_%d:\n",labelno); | |
| 1404 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1405 local_table(); | |
| 1406 labelno++; | |
| 1407 free_all_register(); | |
| 1408 } | |
| 1409 | |
| 1410 void | |
| 1411 enter(char *name) | |
| 1412 { | |
| 1413 printf("\t.align 2\n"); | |
| 1414 if (stmode!=STATIC) | |
| 1415 printf(".globl %s\n",name); | |
| 1416 printf("%s:\n",name); | |
| 1417 printf("\t.type\t%s,@function\n",name); | |
| 1418 printf("\tpushl %%ebp\n"); | |
| 1419 printf("\tmovl %%esp,%%ebp\n"); | |
| 1420 printf("\tpushl %%ebx\n"); | |
| 1421 printf("\tpushl %%esi\n"); | |
| 1422 printf("\tpushl %%edi\n"); | |
| 1423 } | |
| 1424 | |
| 1425 void | |
| 1426 enter1() | |
| 1427 { | |
| 1428 func_disp_label=fwdlabel(); | |
| 1429 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1430 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1431 } | |
| 1432 | |
| 1433 void | |
| 1434 leave(int control, char *name) | |
| 1435 { | |
| 128 | 1436 int sz; |
| 1437 | |
| 1438 disp &= -size_of_int; | |
| 61 | 1439 if (control) |
| 108 | 1440 code_set_return_register(1); |
| 61 | 1441 if (retcont) { |
| 1442 if (control) | |
| 1443 jmp(retlabel); | |
| 1444 fwddef(retcont); | |
| 128 | 1445 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1446 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1447 } else if (cadr(fnptr->ty)>0&&( | |
| 1448 car(cadr(fnptr->ty))==STRUCT || | |
| 1449 car(cadr(fnptr->ty))==UNION)) { | |
| 1450 sz = size(cadr(fnptr->ty)); | |
| 1451 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1452 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1453 register_name(creg,0)); | |
| 1454 emit_copy(dreg,creg,sz,0,1,1); | |
| 1455 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1456 use_register(creg,REG_EAX,0); | |
| 1457 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1458 } | |
| 61 | 1459 } |
| 1460 fwddef(retlabel); | |
| 63 | 1461 |
| 61 | 1462 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1463 printf("\tpopl %%edi\n"); | |
| 1464 printf("\tpopl %%esi\n"); | |
| 1465 printf("\tpopl %%ebx\n"); | |
| 1466 printf("\tleave\n"); | |
| 1467 printf("\tret\n"); | |
| 1468 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1469 printf("_%d:\n",labelno); | |
| 1470 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1471 local_table(); | |
| 1472 labelno++; | |
| 1473 free_all_register(); | |
| 1474 } | |
| 1475 | |
| 1476 | |
| 1477 void | |
| 108 | 1478 code_set_fixed_creg(int mode,int type) { |
| 1479 if (type==FLOAT||type==DOUBLE) { | |
| 1480 } else | |
| 1481 use_register(creg,REG_EAX,mode); | |
| 61 | 1482 } |
| 1483 | |
| 1484 void | |
| 107 | 1485 code_set_return_register(int mode) { |
| 1486 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1487 } else { | |
| 1488 use_register(creg,REG_EAX,mode); | |
| 1489 } | |
| 1490 } | |
| 1491 | |
| 1492 void | |
| 61 | 1493 gen_gdecl(char *n, int gpc) |
| 1494 { | |
| 1495 /* | |
| 1496 if (stmode!=STATIC) | |
| 1497 printf(".globl %s\n",n); | |
| 1498 */ | |
| 1499 } | |
| 1500 | |
| 1501 void | |
| 1502 align(int t) | |
| 1503 { | |
| 1504 if (t!=CHAR) { | |
| 1505 if (data_alignment & 1) | |
| 1506 printf("\t.align 2\n"); | |
| 1507 data_alignment = 0; | |
| 1508 } | |
| 1509 } | |
| 1510 | |
| 1511 void | |
| 1512 emit_data(int e, int t, NMTBL *n) | |
| 1513 { | |
| 1514 int l; | |
| 82 | 1515 double d; |
| 1516 float f; | |
| 61 | 1517 char *name; |
| 1518 name = n->nm; | |
| 1519 if(mode!=GDECL) { | |
| 1520 error(-1); return; | |
| 1521 } | |
| 66 | 1522 if (chk) return; |
| 61 | 1523 if (n->dsp != -1) { |
| 1524 n->dsp = -1; /* initiallized flag */ | |
| 1525 printf(".globl\t%s\n",name); | |
| 1526 data_mode(name); | |
| 1527 align(t); | |
| 1528 printf("%s:\n",name); | |
| 1529 } else { | |
| 1530 data_mode(0); | |
| 1531 } | |
| 1532 if(car(e)==CONST) { | |
| 1533 if (t==CHAR) { | |
| 1534 printf("\t.byte %d\n",cadr(e)); | |
| 1535 if (data_alignment>0) | |
| 1536 data_alignment++; | |
| 1537 gpc += 1; | |
| 82 | 1538 } else if (t==SHORT) { |
| 1539 printf("\t.word %d\n",cadr(e)); | |
| 1540 if (data_alignment>0) data_alignment++; | |
| 1541 gpc += 2; | |
| 61 | 1542 } else { |
| 1543 printf("\t.long %d\n",cadr(e)); | |
| 1544 gpc += size_of_int; | |
| 1545 } | |
| 82 | 1546 } else if(t==DOUBLE) { |
| 1547 d = dcadr(e); | |
| 1548 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1549 } else if(t==FLOAT) { | |
| 1550 f = dcadr(e); | |
| 1551 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1552 } else if(t!=CHAR) { |
| 1553 gpc += size_of_int; | |
| 1554 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1555 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1556 } else if(car(e)==GVAR) { | |
| 1557 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1558 } else if(car(e)==FNAME) { |
| 1559 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1560 } else if(car(e)==STRING) { | |
| 1561 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1562 l = fwdlabel(); | |
| 1563 printf("\t.long _%d\n",l); | |
| 1564 printf(".section\t.rodata\n"); | |
| 1565 printf("_%d:\n",l); | |
| 1566 output_mode = RODATA_EMIT_MODE; | |
| 1567 } | |
| 1568 ascii((char *)cadr(e)); | |
| 1569 } else error(TYERR); | |
| 1570 } | |
| 1571 } | |
| 1572 | |
| 1573 void | |
| 1574 emit_data_closing(NMTBL *n) | |
| 1575 { | |
| 1576 int lb; | |
| 66 | 1577 if (chk) return; |
| 61 | 1578 if (mode==GDECL) { |
| 1579 data_mode(0); | |
| 1580 lb=fwdlabel(); | |
| 1581 printf("_%d:\n",lb); | |
| 1582 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1583 } | |
| 1584 } | |
| 1585 | |
| 1586 void | |
| 1587 global_table(void) | |
| 1588 { | |
| 1589 NMTBL *n; | |
| 1590 int init; | |
| 1591 init=0; | |
| 1592 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1593 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1594 /* n->dsp = -1 means initialized global */ |
| 1595 if (init==0) { | |
| 1596 data_mode(0); | |
| 1597 init=1; | |
| 1598 } | |
| 1599 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1600 } | |
| 1601 } | |
| 1602 } | |
| 1603 | |
| 1604 void | |
| 1605 local_table(void) | |
| 1606 { | |
| 1607 NMTBL *n; | |
| 1608 int init; | |
| 1609 init=0; | |
| 1610 /* static local variables */ | |
| 1611 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1612 if (n->sc == GVAR) { | |
| 1613 if (init==0) { | |
| 1614 data_mode(0); | |
| 1615 init=1; | |
| 1616 } | |
| 1617 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 1618 } | |
| 1619 } | |
| 1620 } | |
| 1621 | |
| 1622 void | |
| 1623 text_mode(void) | |
| 1624 { | |
| 1625 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1626 printf(".text\n"); | |
| 1627 printf("\t.align 2\n"); | |
| 1628 output_mode = TEXT_EMIT_MODE; | |
| 1629 } | |
| 1630 } | |
| 1631 | |
| 1632 void | |
| 1633 data_mode(char *name) | |
| 1634 { | |
| 1635 if (output_mode!=DATA_EMIT_MODE) { | |
| 1636 printf(".data\n"); | |
| 1637 output_mode = DATA_EMIT_MODE; | |
| 1638 } | |
| 1639 if (name) | |
| 1640 printf("\t.type\t%s,@object\n",name); | |
| 1641 } | |
| 1642 | |
| 81 | 1643 /* floating point */ |
| 1644 | |
| 1645 | |
| 82 | 1646 char * |
| 1647 fstore(int d) | |
| 1648 { | |
| 83 | 1649 return use? |
| 1650 (d?"fstl":"fsts"): | |
| 1651 (d?"fstpl":"fstps") | |
| 1652 ; | |
| 1653 } | |
| 1654 | |
| 1655 char * | |
| 1656 fstore_u(int d) | |
| 1657 { | |
| 82 | 1658 return d?"fstpl":"fstps"; |
| 1659 } | |
| 81 | 1660 |
| 82 | 1661 char * |
| 1662 fload(int d) | |
| 1663 { | |
| 1664 return d?"fldl":"flds"; | |
| 1665 } | |
| 81 | 1666 |
| 1667 | |
| 103 | 1668 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1669 { |
| 109 | 1670 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1671 } |
| 1672 | |
| 103 | 1673 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1674 { |
| 119 | 1675 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1676 } |
| 1677 | |
| 111 | 1678 void code_dassign_fregister(int e,int d,int freg) |
| 1679 { | |
| 1680 error(-1); | |
| 1681 } | |
| 1682 | |
| 103 | 1683 void code_dassign(int e2,int freg,int d) |
| 82 | 1684 { |
| 1685 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1686 } | |
| 1687 | |
| 1688 static double d0 = 1.0; | |
| 81 | 1689 |
| 82 | 1690 int |
| 1691 code_d1(double d) | |
| 1692 { | |
| 1693 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1694 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1695 } | |
| 1696 | |
| 1697 int | |
| 1698 code_d2(double d) | |
| 1699 { | |
| 1700 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1701 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1702 } | |
| 1703 | |
| 107 | 1704 void code_dconst(int e2,int freg) |
| 82 | 1705 { |
| 1706 int lb; | |
| 1707 double d = dcadr(e2); | |
| 81 | 1708 |
| 82 | 1709 if (d==0.0) { |
| 1710 printf("\tfldz\n"); return; | |
| 1711 } | |
| 1712 if (d==1.0) { | |
| 1713 printf("\tfld1\n"); return; | |
| 1714 } | |
| 1715 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1716 lb=fwdlabel(); | |
| 1717 printf("_%d:\n",lb); | |
| 1718 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1719 if (output_mode==TEXT_EMIT_MODE) { | |
| 1720 printf(".text\n"); | |
| 1721 } else { | |
| 1722 text_mode(); | |
| 1723 } | |
| 1724 printf("\tfldl _%d\n",lb); | |
| 1725 } | |
| 1726 | |
| 133 | 1727 void code_fconst(int e2,int freg) |
| 1728 { | |
| 1729 code_dconst(e2,freg); | |
| 1730 } | |
| 1731 | |
| 107 | 1732 void code_dneg(int freg) |
| 82 | 1733 { |
| 1734 printf("\tfchs\n"); | |
| 1735 } | |
| 81 | 1736 |
| 133 | 1737 void code_fneg(int freg) |
| 1738 { | |
| 1739 code_dneg(freg); | |
| 1740 } | |
| 1741 | |
| 107 | 1742 void code_d2i(int freg,int creg) |
| 82 | 1743 { |
| 1744 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1745 printf("\tfnstcw (%%esp)\n"); | |
| 1746 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1747 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1748 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1749 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1750 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1751 printf("\tfldcw (%%esp)\n"); |
| 82 | 1752 printf("\tpopl %s\n",register_name(creg,0)); |
| 1753 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1754 } | |
| 81 | 1755 |
| 107 | 1756 void code_i2d(int creg,int freg) |
| 82 | 1757 { |
| 1758 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1759 printf("\tfildl (%%esp)\n"); | |
| 1760 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1761 } | |
| 1762 | |
| 107 | 1763 void code_d2u(int freg,int creg) |
| 85 | 1764 { |
| 86 | 1765 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1766 printf("\tfnstcw (%%esp)\n"); |
| 1767 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1768 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1769 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1770 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1771 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1772 printf("\tfldcw (%%esp)\n"); |
| 86 | 1773 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1774 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1775 } |
| 1776 | |
| 107 | 1777 void code_u2d(int creg,int freg) |
| 85 | 1778 { |
| 86 | 1779 printf("\tpushl %s\n",register_name(creg,0)); |
| 1780 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1781 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1782 printf("\tfildll (%%esp)\n"); | |
| 1783 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1784 } |
| 1785 | |
| 133 | 1786 void code_d2f(int freg) { } |
| 1787 void code_f2d(int freg) { } | |
| 1788 void code_f2i(int freg,int creg) { code_d2i(freg,creg); } | |
| 1789 void code_f2u(int freg,int creg) { code_d2u(freg,creg); } | |
| 1790 void code_i2f(int creg,int freg) { code_i2d(creg,freg); } | |
| 1791 void code_u2f(int creg,int freg) { code_u2d(creg,freg); } | |
| 1792 | |
| 107 | 1793 void code_drgvar(int e2,int d,int freg) |
| 82 | 1794 { |
| 109 | 1795 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1796 } |
| 81 | 1797 |
| 1798 | |
| 107 | 1799 void code_drlvar(int e2,int d,int freg) |
| 82 | 1800 { |
| 119 | 1801 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1802 } |
| 1803 | |
| 1804 void code_cmp_drgvar(int e2) | |
| 1805 { | |
| 109 | 1806 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1807 } |
| 1808 | |
| 1809 void code_cmp_drlvar(int e2) | |
| 1810 { | |
| 119 | 1811 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1812 } |
| 1813 | |
| 1814 void dtosop(int op,int e1) | |
| 94 | 1815 { |
| 82 | 1816 switch(op) { |
| 133 | 1817 case FADD: |
| 82 | 1818 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1819 case FSUB: |
| 85 | 1820 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1821 case FDIV: |
| 85 | 1822 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1823 case FMUL: |
| 82 | 1824 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1825 case FCMP: |
| 89 | 1826 case DCMP: |
| 82 | 1827 printf("\tfucompp\n"); |
| 1828 printf("\tfnstsw\t%%ax\n"); | |
| 1829 break; | |
| 1830 } | |
| 1831 } | |
| 81 | 1832 |
| 83 | 1833 void |
| 1834 code_dassop(int op,int d) { | |
| 1835 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1836 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1837 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1838 dtosop(op,0); | |
| 1839 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1840 } | |
| 1841 | |
| 1842 void | |
| 107 | 1843 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1844 g_expr(e2); |
| 1845 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1846 printf("\tfld1\n"); | |
| 87 | 1847 if (caddr(e1)>0) |
| 83 | 1848 printf("\tfaddp %%st,%%st(1)\n"); |
| 1849 else | |
| 1850 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1851 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1852 } | |
| 1853 | |
| 1854 void | |
| 107 | 1855 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1856 g_expr(e2); |
| 1857 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1858 if (use) | |
| 86 | 1859 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1860 printf("\tfld1\n"); |
| 87 | 1861 if (caddr(e1)>0) |
| 83 | 1862 printf("\tfaddp %%st,%%st(1)\n"); |
| 1863 else | |
| 1864 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1865 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1866 } |
| 1867 | |
| 84 | 1868 void |
| 1869 drexpr(int e1, int e2,int l1, int op) | |
| 1870 { | |
| 89 | 1871 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1872 switch(op) { |
| 1873 case DOP+GE: | |
| 133 | 1874 case FOP+GE: |
| 84 | 1875 printf("\ttestb\t$5,%%ah\n"); |
| 1876 printf("\tjne\t_%d\n",l1); | |
| 1877 break; | |
| 1878 case DOP+GT: | |
| 133 | 1879 case FOP+GT: |
| 84 | 1880 printf("\ttestb\t$69,%%ah\n"); |
| 1881 printf("\tjne\t_%d\n",l1); | |
| 1882 break; | |
| 1883 case DOP+EQ: | |
| 133 | 1884 case FOP+EQ: |
| 84 | 1885 printf("\tandb\t$69,%%ah\n"); |
| 1886 printf("\txorb\t$64,%%ah\n"); | |
| 1887 printf("\tjne\t_%d\n",l1); | |
| 1888 break; | |
| 1889 case DOP+NEQ: | |
| 133 | 1890 case FOP+NEQ: |
| 84 | 1891 printf("\tandb\t$69,%%ah\n"); |
| 1892 printf("\txorb\t$64,%%ah\n"); | |
| 1893 printf("\tje\t_%d\n",l1); | |
| 1894 break; | |
| 1895 } | |
| 1896 } | |
| 1897 | |
| 94 | 1898 void |
| 107 | 1899 code_fregister(int e2,int freg) |
| 94 | 1900 { |
| 1901 error(-1); | |
| 1902 } | |
| 1903 | |
| 1904 void | |
| 97 | 1905 code_cmp_fregister(int r) |
| 94 | 1906 { |
| 1907 error(-1); | |
| 82 | 1908 } |
| 81 | 1909 |
| 97 | 1910 int pop_fregister() |
| 82 | 1911 { |
| 94 | 1912 if (freg_sp<0) { error(-1); return -1;} |
| 1913 printf("# fpop: %d\n",freg_sp-1); | |
| 1914 return freg_stack[--freg_sp]; | |
| 82 | 1915 } |
| 81 | 1916 |
| 94 | 1917 int |
| 1918 emit_dpop(int type) | |
| 1919 { | |
| 1920 int xreg; | |
| 97 | 1921 if ((xreg=pop_fregister())==-1) { |
| 94 | 1922 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1923 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1924 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1925 /* pushed order is reversed. We don't need this for comutable |
| 1926 operator, but it is ok to do this. */ | |
| 1927 printf("\tfxch\t%%st(1)\n"); | |
| 1928 } | |
| 1929 return xreg; | |
| 1930 } | |
| 1931 | |
| 1932 | |
| 81 | 1933 void emit_dpop_free(int e1) |
| 82 | 1934 { |
| 1935 } | |
| 81 | 1936 |
| 133 | 1937 void emit_dpush(int type) |
| 82 | 1938 { |
| 119 | 1939 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1940 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1941 freg_stack[freg_sp++]=-1; |
| 94 | 1942 printf("# fpush:%d\n",freg_sp); |
| 1943 } | |
| 1944 | |
| 1945 void | |
| 1946 code_save_stacks() | |
| 1947 { | |
| 1948 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1949 int xreg,sp,screg; | |
| 1950 sp=reg_sp; | |
| 1951 while(sp-->0) { | |
| 1952 if ((xreg=reg_stack[sp])>=0) { | |
| 1953 screg=creg; | |
| 1954 if(creg!=xreg) { | |
| 1955 if (xreg!=dreg) free_register(xreg); | |
| 1956 creg = xreg; | |
| 1957 } | |
| 1958 code_assign_lvar( | |
| 119 | 1959 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1960 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1961 regv[xreg]=0; | |
| 1962 creg=screg; | |
| 1963 } | |
| 1964 } | |
| 107 | 1965 code_save_fstacks(); |
| 1966 } | |
| 1967 | |
| 1968 void | |
| 1969 code_save_fstacks() | |
| 1970 { | |
| 127 | 1971 int xreg,sp,uses; |
| 1972 uses = use; use = 0; | |
| 94 | 1973 sp=freg_sp; |
| 1974 while(sp-->0) { | |
| 1975 if ((xreg=freg_stack[sp])==-1) { | |
| 1976 code_dassign_lvar( | |
| 119 | 1977 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1978 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 1979 } | |
| 1980 } | |
| 127 | 1981 use = uses; |
| 82 | 1982 } |
| 81 | 1983 |
| 61 | 1984 /* end */ |