Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 144:56211702f298
creg/freg continue
| author | kono |
|---|---|
| date | Wed, 21 May 2003 21:41:06 +0900 |
| parents | 742224f4da02 |
| children | cb7aa0089681 |
| 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; | |
| 138 | 35 int MAX_INPUT_FREGISTER_VAR = 0; |
| 119 | 36 int MAX_CODE_INPUT_DREGISTER_VAR = 0; |
| 61 | 37 |
| 138 | 38 int reg_sp; /* REGister Stack-Pointer */ |
| 39 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 40 | |
| 41 /* floating point registers */ | |
| 42 | |
| 43 int freg_sp; /* floating point REGister Stack-Pointer */ | |
| 44 int freg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 45 | |
| 46 | |
| 61 | 47 /* |
| 128 | 48 -28 -8 local2 |
| 49 -24 -4 local1 | |
| 50 -20 8 arg3 | |
| 51 -16 4 arg2 | |
| 52 -12 0 arg1 | |
| 53 local2 -20 4 -8 (%edi) | |
| 54 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 55 %edi -12 <- disp_offset %ebp |
| 56 %esi -8 | |
| 57 %ebx -4 | |
| 58 %ebp = %esp 0 | |
| 59 %eip 4 <- arg_offset | |
| 60 arg1 8 0 | |
| 61 arg2 12 4 | |
| 62 see enter/enter1/leave see code_enter | |
| 63 */ | |
| 64 int arg_offset = 8; | |
| 65 int disp_offset = -12; | |
| 66 int func_disp_offset = -12; | |
| 67 int code_disp_offset = 0; | |
| 68 int jump_offset = 0; | |
| 69 | |
| 119 | 70 static int code_disp_label; |
| 71 static int func_disp_label; | |
| 61 | 72 |
| 119 | 73 static int |
| 74 lvar(int l) | |
| 75 { | |
| 76 if (is_code(fnptr)) { | |
| 77 return l+code_disp_offset; | |
| 78 } else if (l<0) { | |
| 79 return l+disp_offset; | |
| 80 } else { | |
| 81 return l+arg_offset; | |
| 82 } | |
| 83 } | |
| 99 | 84 |
| 95 | 85 /* |
| 86 creg currrent virtual register | |
| 87 dreg spare virtual register | |
| 88 | |
| 89 rname[creg] currrent real register | |
| 90 rname[dreg] spare real register | |
| 91 | |
| 92 regs[] virtual register usage | |
| 93 regv[] value in virtual register flag | |
| 94 | |
| 95 reg_name[rname[creg]] | |
| 96 | |
| 97 freg current floating point register | |
| 98 fregv calue in floating point register | |
| 99 */ | |
| 100 | |
| 101 static int dreg; /* general temporal register */ | |
| 102 | |
| 103 int ia32regs[REAL_MAX_REGISTER]; | |
| 104 int ia32regv[REAL_MAX_REGISTER]; | |
| 105 int ia32rname[REAL_MAX_REGISTER]; | |
| 106 | |
| 107 int *regv = ia32regv; | |
| 108 int *regs = ia32regs; | |
| 109 static int *rname = ia32rname; | |
| 110 | |
| 111 int ia32fregs[1]; | |
| 112 int ia32fregv[1]; | |
| 113 | |
| 114 int freg; | |
| 115 int *fregv = ia32fregv; | |
| 116 int *fregs = ia32fregs; | |
| 117 | |
| 61 | 118 |
| 119 #define REG_EAX 0 | |
| 120 #define REG_EBX 1 | |
| 121 #define REG_ECX 2 | |
| 122 #define REG_EDX 3 | |
| 123 #define REG_ESI 4 | |
| 124 #define REG_EDI 5 | |
| 125 #define REG_EBP 6 | |
| 126 #define REG_ESP 7 | |
| 127 | |
| 128 | |
| 129 #define DATA_REG 0 | |
| 130 #define POINTER_REG 3 | |
| 131 static char *reg_name[8]; | |
| 132 static char *reg_name_l[4]; | |
| 133 static char *reg_name_w[4]; | |
| 134 | |
| 93 | 135 static void use_register(int virt, int real, int move); |
| 136 static int virtual(int real); | |
| 137 static void shift(char *op, int reg); | |
| 138 static void ld_indexx(int byte, int n, int xreg); | |
| 139 static void data_mode(char *name); | |
| 140 static int edx_setup(); | |
| 141 static void edx_cleanup(); | |
| 142 static void local_table(void); | |
| 143 static char * fload(int d); | |
| 144 static int code_d1(double d); | |
| 145 static int code_d2(double d); | |
| 94 | 146 static void code_save_stacks(); |
| 107 | 147 static void code_save_fstacks(); |
| 82 | 148 |
| 61 | 149 void |
| 150 code_init(void) | |
| 151 { | |
| 152 arg_offset = 8; | |
| 153 func_disp_offset = -12; | |
| 154 disp_offset = -12; | |
| 155 size_of_int = 4; | |
| 156 endian = 0; | |
| 157 MAX_REGISTER=6; | |
| 158 MAX_DATA_REG=4; | |
| 159 MAX_POINTER=3; | |
| 160 MAX_REGISTER_VAR=2; | |
| 161 | |
| 162 reg_name[REG_EAX] = "%eax"; | |
| 163 reg_name[REG_EBX] = "%ebx"; | |
| 164 reg_name[REG_ECX] = "%ecx"; | |
| 165 reg_name[REG_EDX] = "%edx"; | |
| 166 reg_name[REG_ESI] = "%esi"; | |
| 167 reg_name[REG_EDI] = "%edi"; | |
| 168 reg_name[REG_EBP] = "%ebp"; | |
| 169 reg_name[REG_ESP] = "%esp"; | |
| 170 reg_name_l[REG_EAX] = "%al"; | |
| 171 reg_name_l[REG_EBX] = "%bl"; | |
| 172 reg_name_l[REG_ECX] = "%cl"; | |
| 173 reg_name_l[REG_EDX] = "%dl"; | |
| 174 reg_name_w[REG_EAX] = "%ax"; | |
| 175 reg_name_w[REG_EBX] = "%bx"; | |
| 176 reg_name_w[REG_ECX] = "%cx"; | |
| 177 reg_name_w[REG_EDX] = "%dx"; | |
| 178 | |
| 179 } | |
| 180 | |
| 181 char * | |
| 182 register_name(int i,int byte) | |
| 183 { | |
| 184 if (i<0) { | |
| 185 error(REG_ERR); | |
| 186 return "%eax"; | |
| 187 } | |
| 188 if (byte && rname[i] <= REG_EDX) { | |
| 189 return reg_name_l[rname[i]]; | |
| 190 } else { | |
| 191 return reg_name[rname[i]]; /* should be error */ | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 void | |
| 196 gexpr_code_init(void){ | |
| 197 use_register(creg,REG_EAX,0); | |
| 94 | 198 regv[creg]=0; |
| 61 | 199 regv[dreg]=0; |
| 200 } | |
| 201 | |
| 202 int | |
| 203 register_var(int r) { | |
| 204 return virtual(r+REG_ESI); | |
| 205 } | |
| 206 | |
| 89 | 207 int |
| 208 get_register(void) | |
| 209 { /* 使われていないレジスタを調べる */ | |
| 210 int i; | |
| 211 for(i=0;i<MAX_REGISTER;i++) { | |
| 212 if (! regs[i]) { /* 使われていないなら */ | |
| 213 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 214 return i; /* その場所を表す番号を返す */ | |
| 215 } | |
| 216 } | |
| 217 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 218 } | |
| 219 | |
| 220 void | |
| 221 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 222 regv[i]=regs[i]=0; | |
| 223 } | |
| 224 | |
| 99 | 225 int |
| 126 | 226 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 227 { |
| 126 | 228 if (is_code) { |
| 229 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 230 i = virtual(i+REG_ESI); | |
| 231 regs[i]=regv[i]=1; | |
| 232 return list3(REGISTER,i,(int)nptr); | |
| 233 } else { | |
| 234 return 0; | |
| 235 } | |
| 99 | 236 } |
| 103 | 237 |
| 99 | 238 int |
| 138 | 239 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 240 { |
| 126 | 241 return 0; |
| 99 | 242 } |
| 243 | |
| 244 int | |
| 138 | 245 get_dregister(int d) |
| 99 | 246 { |
| 247 return -1; | |
| 248 } | |
| 249 | |
| 250 void | |
| 139 | 251 free_dregister(int i) { |
| 99 | 252 error(-1); |
| 253 } | |
| 254 | |
| 89 | 255 int |
| 256 register_full(void) | |
| 257 { | |
| 258 int i; | |
| 259 for(i=0;i<MAX_REGISTER;i++) { | |
| 260 if (! regs[i]) { | |
| 261 return 0; | |
| 262 } | |
| 263 } | |
| 264 return 1; | |
| 265 } | |
| 266 | |
| 267 int | |
| 137 | 268 free_register_count(int d) |
| 89 | 269 { |
| 270 int i,count; | |
| 271 count = 0; | |
| 272 for(i=0;i<MAX_REGISTER;i++) { | |
| 273 if (! regs[i] && ! regv[i]) count++; | |
| 274 } | |
| 137 | 275 return d?0:count; |
| 89 | 276 } |
| 277 | |
| 278 void | |
| 279 free_all_register(void) | |
| 280 { | |
| 281 int i; | |
| 282 for(i=0;i<MAX_REGISTER;i++) { | |
| 283 regs[i]=regv[i]=0; | |
| 284 } | |
| 285 creg = get_register(); | |
| 286 dreg = get_register(); | |
| 287 return; | |
| 288 } | |
| 289 | |
| 290 | |
| 291 void | |
| 292 register_usage(char *s) | |
| 293 { | |
| 294 int i; | |
| 295 if (chk) return; | |
| 296 printf("# %d: %s:",lineno,s); | |
| 297 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 298 for(i=0;i<MAX_REGISTER;i++) { | |
| 299 printf("%d",regs[i]); | |
| 300 } | |
| 301 printf(":"); | |
| 302 for(i=0;i<MAX_REGISTER;i++) { | |
| 303 printf("%d",regv[i]); | |
| 304 } | |
| 305 #if 0 | |
| 306 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 307 for(i=reg_sp;i>=0;i--) { | |
| 308 if(reg_stack[i]>=0) | |
| 309 printf(" %s",register_name(reg_stack[i],0)); | |
| 310 } | |
| 311 #endif | |
| 94 | 312 printf(" f:%d",freg_sp); |
| 89 | 313 printf("\n"); |
| 314 } | |
| 315 | |
| 109 | 316 void |
| 137 | 317 code_arg_register(NMTBL *fnptr) |
| 109 | 318 { |
| 137 | 319 int args = fnptr->dsp; |
| 320 NMTBL *n; | |
| 321 int reg_var = 0; | |
| 322 int freg_var = 0; | |
| 323 int type; | |
| 324 int reg; | |
| 325 int is_code0 = is_code(fnptr); | |
| 326 | |
| 327 while (args) { | |
| 328 /* process in reverse order */ | |
| 329 n = (NMTBL*)caddr(args); | |
| 330 type = n->ty; | |
| 331 if (scalar(type)) { | |
| 332 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 333 n->sc = REGISTER; | |
| 334 n->dsp = cadr(reg); | |
| 335 regv[n->dsp]= 1; | |
| 336 regs[n->dsp]= INPUT_REG; | |
| 337 reg_var++; | |
| 338 cadddr(args)=size_of_int; /* why we need this? */ | |
| 339 } | |
| 340 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 341 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 342 n->sc = DREGISTER; |
| 343 n->dsp = cadr(reg); | |
| 344 fregv[n->dsp]= 1; | |
| 345 fregs[n->dsp]= INPUT_REG; | |
| 346 freg_var++; | |
| 347 cadddr(args)=size(type); /* why we need this? */ | |
| 348 } | |
| 349 } | |
| 350 args = cadr(args); | |
| 351 } | |
| 109 | 352 } |
| 353 | |
| 89 | 354 void |
| 355 gexpr_init(void) | |
| 356 { | |
| 357 while(reg_sp > 0) { | |
| 94 | 358 if (reg_stack[--reg_sp]>=0) |
| 359 free_register(reg_stack[reg_sp]); | |
| 89 | 360 } |
| 94 | 361 freg_sp = 0; |
| 89 | 362 text_mode(); |
| 363 gexpr_code_init(); | |
| 364 register_usage("gexpr_init"); | |
| 365 } | |
| 366 | |
| 367 | |
| 368 void | |
| 369 emit_init(void) | |
| 370 { | |
| 371 int i; | |
| 372 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 373 free_all_register(); | |
| 374 reg_sp = 0; | |
| 94 | 375 freg_sp = 0; |
| 89 | 376 text_mode(); |
| 377 } | |
| 378 | |
| 379 int | |
| 380 virtual(int real) | |
| 381 { | |
| 382 int real_v,i; | |
| 383 real_v = -1; | |
| 384 for(i=0;i<MAX_REGISTER;i++) { | |
| 385 if (rname[i]==real) { | |
| 386 real_v=i; | |
| 387 break; | |
| 388 } | |
| 389 } | |
| 390 return real_v; | |
| 391 } | |
| 392 | |
| 393 int | |
| 394 pop_register(void) | |
| 395 { /* レジスタから値を取り出す */ | |
| 396 return reg_stack[--reg_sp]; | |
| 397 } | |
| 398 | |
| 399 void | |
| 400 emit_pop_free(int xreg) | |
| 401 { | |
| 402 if (xreg==dreg) { | |
| 403 regv[dreg]=0; | |
| 98 | 404 } else if (xreg>=0) { |
| 89 | 405 free_register(xreg); |
| 406 } | |
| 407 } | |
| 408 | |
| 409 | |
| 61 | 410 int |
| 105 | 411 get_register_var(NMTBL *nptr) |
| 61 | 412 { |
| 413 int i; | |
| 414 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 415 if (! regs[i]) { /* 使われていないなら */ | |
| 416 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 417 regv[i]=0; | |
| 105 | 418 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 419 } |
| 420 } | |
| 104 | 421 return list2(LVAR,new_lvar(size_of_int)); |
| 422 } | |
| 423 | |
| 424 int | |
| 138 | 425 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 426 { |
| 138 | 427 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 428 } |
| 429 | |
| 61 | 430 void |
| 431 use_register(int virt, int real, int move) | |
| 432 { | |
| 433 int real_v; | |
| 434 char *move_op; | |
| 435 if (rname[virt]==real) | |
| 436 return; | |
| 437 real_v = virtual(real); | |
| 438 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 439 if (move || (regv[real_v])) { | |
| 440 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 441 } | |
| 442 rname[real_v] = rname[virt]; | |
| 443 rname[virt] = real; | |
| 444 } | |
| 445 | |
| 446 void | |
| 447 use_pointer(int virt, int move) | |
| 448 { | |
| 449 int i; | |
| 450 if (rname[virt]>=POINTER_REG) | |
| 451 return; | |
| 452 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 453 if (!regs[virtual(i)]) { | |
| 454 use_register(virt,i,move); | |
| 455 return; | |
| 456 } | |
| 457 } | |
| 458 /* we prefer EBX */ | |
| 459 use_register(virt,REG_EBX,move); | |
| 460 } | |
| 461 | |
| 462 void | |
| 463 use_data_reg(int virt, int move) | |
| 464 { | |
| 465 int i; | |
| 466 if (rname[virt]<MAX_DATA_REG) | |
| 467 return; | |
| 468 for(i=0;i<MAX_DATA_REG;i++) { | |
| 469 if (!regs[virtual(i)]) { | |
| 470 use_register(virt,i,move); | |
| 471 return; | |
| 472 } | |
| 473 } | |
| 474 /* we prefer EBX */ | |
| 475 use_register(virt,REG_EBX,move); | |
| 476 } | |
| 477 | |
| 478 | |
| 479 void | |
| 107 | 480 emit_push() |
| 61 | 481 { |
| 482 int new_reg; | |
| 483 new_reg = get_register(); | |
| 484 if(new_reg<0) { /* もうレジスタがない */ | |
| 83 | 485 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 486 reg_stack[reg_sp++] = -1; |
| 487 printf("\tpushl %s\n",register_name(creg,0)); | |
| 488 /* creg is used soon, don't regv[creg]=0 */ | |
| 489 } else { | |
| 490 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 491 creg = new_reg; | |
| 492 regv[creg]=1; | |
| 493 } | |
| 494 } | |
| 495 | |
| 496 int | |
| 497 emit_pop(int type) | |
| 498 { | |
| 499 int xreg; | |
| 500 if ((xreg=pop_register())==-1) { | |
| 501 if (type==POINTER_REG) | |
| 502 use_pointer(dreg,0); | |
| 503 else if (type==DATA_REG) | |
| 504 use_data_reg(dreg,0); | |
| 505 if (regv[dreg]) { | |
| 506 printf("# emit_pop dreg conflict\n"); | |
| 94 | 507 error(-1); |
| 61 | 508 } |
| 509 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 510 regv[dreg]=1; |
| 511 return dreg; | |
| 512 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 513 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 514 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 515 regv[dreg]=1; |
| 516 return dreg; | |
| 517 } | |
| 61 | 518 return xreg; |
| 519 } | |
| 520 | |
| 92 | 521 void |
| 522 code_label(int labelno) | |
| 523 { | |
| 524 printf("_%d:\n",labelno); | |
| 525 } | |
| 61 | 526 |
| 527 void | |
| 107 | 528 code_gvar(int e1,int creg) { |
| 109 | 529 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 530 regv[creg]=1; |
| 61 | 531 } |
| 532 | |
| 533 | |
| 534 void | |
| 107 | 535 code_rgvar(int e1,int creg) { |
| 109 | 536 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 537 regv[creg]=1; |
| 61 | 538 } |
| 539 | |
| 540 void | |
| 107 | 541 code_crgvar(int e1,int creg){ |
| 109 | 542 printf("\tmovsbl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 543 regv[creg]=1; |
| 61 | 544 } |
| 545 | |
| 546 | |
| 547 void | |
| 107 | 548 code_lvar(int e2,int creg) { |
| 119 | 549 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 550 regv[creg]=1; |
| 61 | 551 } |
| 552 | |
| 553 | |
| 554 void | |
| 107 | 555 code_register(int e2,int creg) { |
| 61 | 556 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 557 regv[creg]=1; |
| 61 | 558 } |
| 559 | |
| 560 | |
| 561 void | |
| 94 | 562 code_rlvar(int e2,int reg) { |
| 119 | 563 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 564 regv[creg]=1; |
| 61 | 565 } |
| 566 | |
| 567 | |
| 568 void | |
| 94 | 569 code_crlvar(int e2,int reg) { |
| 119 | 570 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 571 regv[creg]=1; |
| 61 | 572 } |
| 573 | |
| 574 | |
| 575 void | |
| 109 | 576 code_fname(NMTBL *n,int creg) { |
| 577 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 578 regv[creg]=1; |
| 61 | 579 } |
| 580 | |
| 581 | |
| 582 void | |
| 107 | 583 code_const(int e2,int creg) { |
| 61 | 584 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 585 regv[creg]=1; |
| 61 | 586 } |
| 587 | |
| 588 | |
| 589 void | |
| 107 | 590 code_neg(int creg) { |
| 61 | 591 printf("\tnegl %s\n", register_name(creg,0)); |
| 592 } | |
| 593 | |
| 594 | |
| 595 void | |
| 107 | 596 code_not(int creg) { |
| 61 | 597 printf("\tnotl %s\n", register_name(creg,0)); |
| 598 } | |
| 599 | |
| 600 | |
| 601 void | |
| 107 | 602 code_lnot(int creg) { |
| 61 | 603 char *xrn; |
| 604 use_data_reg(creg,1); | |
| 605 xrn = register_name(creg,1); | |
| 606 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 607 printf("\tsete %s\n", xrn); | |
| 608 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 609 } | |
| 610 | |
| 611 void | |
| 107 | 612 code_preinc(int e1,int e2,int reg) { |
| 61 | 613 char *xrn; |
| 614 if (car(e2)==REGISTER) { | |
| 615 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 107 | 616 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 617 regv[reg]=1; | |
| 61 | 618 return; |
| 619 } | |
| 620 g_expr(e2); | |
| 621 xrn = register_name(creg,0); | |
| 622 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 623 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 624 } | |
| 625 | |
| 626 | |
| 627 void | |
| 107 | 628 code_postinc(int e1,int e2,int reg) { |
| 61 | 629 char *xrn; |
| 630 if (car(e2)==REGISTER) { | |
| 107 | 631 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 61 | 632 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 633 regv[reg]=1; |
| 61 | 634 return; |
| 635 } | |
| 636 g_expr(e2); | |
| 637 emit_push(); | |
| 638 xrn = register_name((e2=emit_pop(0)),0); | |
| 639 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); | |
| 640 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 641 emit_pop_free(e2); | |
| 642 } | |
| 643 | |
| 644 | |
| 645 void | |
| 107 | 646 code_cpostinc(int e1,int e2,int reg) { |
| 61 | 647 char *xrn; |
| 648 if (car(e2)==REGISTER) { | |
| 89 | 649 printf("\tmovbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 650 register_name(reg,0)); |
| 61 | 651 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 652 regv[reg]=1; |
| 61 | 653 return; |
| 654 } | |
| 655 g_expr(e2); | |
| 656 emit_push(); | |
| 657 xrn = register_name((e2=emit_pop(0)),1); | |
| 658 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); | |
| 659 printf("\tincl (%s)\n",xrn); | |
| 660 emit_pop_free(e2); | |
| 661 } | |
| 662 | |
| 663 | |
| 664 void | |
| 107 | 665 code_cpreinc(int e1,int e2,int reg) { |
| 61 | 666 if (car(e2)==REGISTER) { |
| 667 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 89 | 668 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 669 register_name(reg,0)); |
| 670 regv[reg]=1; | |
| 61 | 671 return; |
| 672 } | |
| 673 g_expr(e2); | |
| 674 printf("\tincl (%s)\n",register_name(creg,0)); | |
| 675 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 676 } | |
| 677 | |
| 678 | |
| 679 void | |
| 107 | 680 code_cpostdec(int e1,int e2,int reg) { |
| 61 | 681 if (car(e2)==REGISTER) { |
| 89 | 682 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 683 register_name(reg,0)); |
| 61 | 684 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 107 | 685 regv[reg]=1; |
| 61 | 686 return; |
| 687 } | |
| 688 g_expr(e2); | |
| 689 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 690 printf("\tdecl (%s)\n",register_name(creg,0)); | |
| 691 } | |
| 692 | |
| 693 | |
| 694 void | |
| 107 | 695 code_cpredec(int e1,int e2,int reg) { |
| 61 | 696 if (car(e2)==REGISTER) { |
| 697 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 89 | 698 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 699 register_name(reg,0)); |
| 700 regv[reg]=1; | |
| 701 return; | |
| 61 | 702 } |
| 703 g_expr(e2); | |
| 704 emit_push(); | |
| 705 e2 = emit_pop(0); | |
| 706 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 707 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); | |
| 708 emit_pop_free(e2); | |
| 709 } | |
| 710 | |
| 711 | |
| 712 void | |
| 107 | 713 code_return(int creg) { |
| 61 | 714 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 715 regv[creg]=1; |
| 61 | 716 } |
| 717 | |
| 718 | |
| 719 void | |
| 107 | 720 code_environment(int creg) { |
| 61 | 721 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 722 regv[creg]=1; |
| 61 | 723 } |
| 724 | |
| 725 | |
| 726 void | |
| 116 | 727 code_bool(int e1) { |
| 61 | 728 char *xrn; |
| 729 int e2,e3; | |
| 730 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 731 xrn = register_name(creg,0); | |
| 732 printf("\txorl %s,%s\n",xrn,xrn); | |
| 733 jmp(e3=fwdlabel()); | |
| 734 fwddef(e2); | |
| 735 printf("\tmovl $1,%s\n",xrn); | |
| 736 fwddef(e3); | |
| 107 | 737 regv[creg]=1; |
| 61 | 738 } |
| 739 | |
| 740 char * | |
| 741 code_gt(int cond) { | |
| 742 return (cond?"g":"le"); | |
| 743 } | |
| 744 | |
| 745 char * | |
| 746 code_ugt(int cond) { | |
| 747 return (cond?"a":"be"); | |
| 748 } | |
| 749 | |
| 750 char * | |
| 751 code_ge(int cond) { | |
| 752 return (cond?"ge":"l"); | |
| 753 } | |
| 754 | |
| 755 char * | |
| 756 code_uge(int cond) { | |
| 757 return (cond?"ae":"b"); | |
| 758 } | |
| 759 | |
| 760 char * | |
| 761 code_eq(int cond) { | |
| 762 return (cond?"e":"ne"); | |
| 763 } | |
| 764 | |
| 765 void | |
| 766 code_cmp_crgvar(int e1) { | |
| 109 | 767 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 768 } |
| 769 | |
| 770 | |
| 771 void | |
| 772 code_cmp_crlvar(int e1) { | |
| 119 | 773 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 774 } |
| 775 | |
| 776 | |
| 777 void | |
| 778 code_cmp_rgvar(int e1) { | |
| 109 | 779 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 780 } |
| 781 | |
| 782 | |
| 783 void | |
| 784 code_cmp_rlvar(int e1) { | |
| 119 | 785 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 786 } |
| 787 | |
| 788 | |
| 789 void | |
| 790 code_cmp_register(int e2) { | |
| 791 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 792 } | |
| 793 | |
| 794 | |
| 795 void | |
| 796 ascii(char *s) | |
| 797 { | |
| 798 printf("\t.string \""); | |
| 799 while(*s) { | |
| 800 if (*s=='\n') | |
| 801 printf("%cn",92); | |
| 802 else if (*s<' ') | |
| 803 printf("%c%03o",92,*s); | |
| 804 else if (*s==34) | |
| 805 printf("%c%c",92,34); | |
| 806 else | |
| 807 printf("%c",*s); | |
| 808 s++; | |
| 809 } | |
| 810 printf("%c\n",34); | |
| 811 } | |
| 812 | |
| 813 void | |
| 107 | 814 code_string(int e1,int creg) |
| 61 | 815 { |
| 816 char *s; | |
| 817 int i,lb; | |
| 818 | |
| 819 if (0) { | |
| 820 s=(char *)cadr(e1); | |
| 821 lb=fwdlabel(); | |
| 822 printf("\tjmp _%d\n",lb); | |
| 823 i=backdef(); | |
| 824 ascii(s); | |
| 825 printf("\t.align 2\n"); | |
| 826 fwddef(lb); | |
| 827 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 828 } else { | |
| 829 s=(char *)cadr(e1); | |
| 830 printf(".section\t.rodata\n"); | |
| 831 lb=fwdlabel(); | |
| 832 printf("_%d:\n",lb); | |
| 833 ascii(s); | |
| 834 if (output_mode==TEXT_EMIT_MODE) { | |
| 835 printf(".text\n"); | |
| 836 } else { | |
| 837 text_mode(); | |
| 838 } | |
| 839 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 840 } | |
| 841 } | |
| 842 | |
| 843 #define MAX_COPY_LEN 20 | |
| 844 | |
| 845 void | |
| 846 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 847 { | |
| 848 int fix = 0; | |
| 849 /* length <0 means upward direction copy */ | |
| 850 switch (length) { | |
| 851 case 0: break; | |
| 852 case 1: case -1: | |
| 853 printf("\tmovb %d(%s),%s\n",offset, | |
| 854 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 855 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 856 register_name(to,0)); | |
| 857 break; | |
| 858 case 2: case -2: | |
| 859 printf("\tmovw %d(%s),%s\n",offset, | |
| 860 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 861 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 862 register_name(to,0)); | |
| 863 break; | |
| 864 case 4: case -4: | |
| 865 printf("\tmovl %d(%s),%s\n",offset, | |
| 866 register_name(from,0), register_name(dreg,0)); | |
| 867 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 868 register_name(to,0)); | |
| 869 break; | |
| 870 default: | |
| 871 if (-MAX_COPY_LEN<length && length <0) { | |
| 872 for(;length<=4;length+=4,offset-=4) | |
| 873 emit_copy(from,to,4,offset,0,det); | |
| 874 for(;length<=2;length+=2,offset-=2) | |
| 875 emit_copy(from,to,2,offset,0,det); | |
| 876 if(length>0) | |
| 877 emit_copy(from,to,length,offset,0,det); | |
| 878 break; | |
| 879 } else if (length <=MAX_COPY_LEN) { | |
| 880 for(;length>=4;length-=4,offset+=4) | |
| 881 emit_copy(from,to,4,offset,0,det); | |
| 882 for(;length>=2;length-=2,offset+=2) | |
| 883 emit_copy(from,to,2,offset,0,det); | |
| 884 if(length>0) | |
| 885 emit_copy(from,to,length,offset,0,det); | |
| 886 break; | |
| 887 } | |
| 888 if (det) { | |
| 889 /* | |
| 890 call bcopy | |
| 891 g_expr(list3(FUNCTION,,); | |
| 892 break; | |
| 893 */ | |
| 894 } | |
| 895 use_register(from,REG_ESI,1); | |
| 896 use_register(to, REG_EDI,1); | |
| 897 use_register(dreg,REG_ECX,0); | |
| 898 if (length<0) { | |
| 899 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 900 printf("\taddl $%d,%%esi\n",-length); | |
| 901 printf("\taddl $%d,%%edi\n",-length); | |
| 902 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 903 if(length%4) { | |
| 904 emit_copy(from,to,length,offset+length/4,0,det); | |
| 905 } | |
| 906 } else { | |
| 907 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 908 fix = (length/4)*4; | |
| 909 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 910 if(length%4) { | |
| 911 emit_copy(from,to,length,offset+length/4,0,det); | |
| 912 } | |
| 913 } | |
| 914 } | |
| 915 if (value) { | |
| 916 /* creg must point top of the destination data */ | |
| 917 /* this code is necessary for the value of assignment or function call */ | |
| 918 /* otherwise we don't need this */ | |
| 919 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 920 if(creg!=to) { | |
| 921 if (to==dreg) | |
| 922 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 923 else { | |
| 924 free_register(creg); creg=to; | |
| 925 } | |
| 926 } | |
| 927 } | |
| 928 regv[from]=regv[to]=regv[dreg]=0; | |
| 929 regv[creg]=1; | |
| 930 } | |
| 931 | |
| 932 int | |
| 933 struct_push(int e4,int t) | |
| 934 { | |
| 81 | 935 int length,xreg,save,lreg,count; |
| 61 | 936 g_expr(e4); |
| 937 length=size(t); | |
| 938 if(length%size_of_int) { | |
| 939 length += size_of_int - (length%size_of_int); | |
| 940 } | |
| 81 | 941 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 942 if (length==0) return count; | |
| 943 else { | |
| 944 printf("\tpushl %d(%s)\n", | |
| 945 length-size_of_int,register_name(creg,0)); | |
| 946 } | |
| 61 | 947 } |
| 948 printf("\tsubl $%d,%%esp\n",length); | |
| 949 if (register_full()) { | |
| 950 save = 1; | |
| 951 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 952 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 953 xreg = lreg; regv[xreg]=0; | |
| 954 } else { | |
| 955 save=0; | |
| 956 xreg = get_register(); | |
| 957 } | |
| 958 if (save) | |
| 959 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 960 else | |
| 961 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 962 regv[xreg]=1; | |
| 963 /* downward direction copy */ | |
| 964 emit_copy(creg,xreg,length,0,0,1); | |
| 965 /* we have value in creg, it may be changed */ | |
| 966 if (save) { | |
| 967 if(creg==xreg) { | |
| 968 creg = get_register(); /* creg is freed in emit_copy */ | |
| 969 } | |
| 970 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 971 regv[xreg]=1; | |
| 972 } else | |
| 973 free_register(xreg); | |
| 974 return length/size_of_int; | |
| 975 } | |
| 976 | |
| 94 | 977 int |
| 61 | 978 function(int e1) |
| 979 { | |
| 127 | 980 int e2,e3,e4,nargs,t,ret_type; |
| 981 NMTBL *n=0; | |
| 61 | 982 int save,saved; |
|
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983 ret_type = cadr(cadddr(e1)); |
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984 if (ret_type==CHAR) ret_type=INT; |
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changeset
|
985 |
| 94 | 986 #ifdef SAVE_STACKS |
| 987 code_save_stacks(); | |
| 988 #endif | |
| 137 | 989 if (free_register_count(0)<1) { |
| 61 | 990 for(save = 0;save==dreg||save==creg;save++); |
| 991 printf("\tpushl %s\n",register_name(save,0)); | |
| 992 saved = 1; | |
| 993 } else { | |
| 994 save = get_register(); | |
| 995 saved = 0; | |
| 996 } | |
| 997 regv[save]=0; | |
| 998 e2 = cadr(e1); | |
| 999 nargs = 0; | |
| 1000 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 1001 t=caddr(e3); | |
| 127 | 1002 e4 = car(e3); |
| 61 | 1003 if(scalar(t)) { |
| 1004 g_expr(e4); | |
| 1005 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1006 } else if (t==DOUBLE) { |
| 1007 g_expr(e4); | |
| 1008 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1009 nargs += size_of_double/size_of_int; |
| 83 | 1010 fregv[freg]=0; |
| 82 | 1011 continue; |
| 1012 } else if (t==FLOAT) { | |
| 1013 g_expr(e4); | |
| 1014 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1015 nargs += size_of_float/size_of_int; |
| 83 | 1016 fregv[freg]=0; |
| 82 | 1017 continue; |
| 61 | 1018 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1019 nargs += struct_push(e4,t); | |
| 1020 continue; | |
| 1021 } else { | |
| 1022 error(TYERR); | |
| 1023 } | |
| 1024 ++nargs; | |
| 1025 } | |
| 1026 if (car(e2) == FNAME) { | |
| 1027 n=(NMTBL *)cadr(e2); | |
| 78 | 1028 regv[creg]=0; |
| 1029 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1030 } else { |
| 1031 g_expr(e2); | |
| 78 | 1032 regv[creg]=1; |
| 1033 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1034 } |
| 1035 | |
| 1036 /* we don't have to save creg nor dreg */ | |
| 1037 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1038 regv[dreg]= regv[save]= 0; |
| 61 | 1039 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1040 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1041 regs[creg]=1; regs[dreg]=1; | |
| 1042 | |
| 1043 if (car(e2) == FNAME) { | |
| 1044 printf("\tcall\t%s\n",n->nm); | |
| 1045 } else { | |
| 1046 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1047 } | |
| 1048 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1049 if (saved) { | |
| 1050 printf("\tpopl %s\n",register_name(save,0)); | |
| 1051 } else { | |
| 1052 free_register(save); | |
| 1053 } | |
| 1054 regv[save]=0; | |
| 105 | 1055 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1056 fregv[freg]=1; regv[creg]=0; |
| 105 | 1057 } else if (ret_type==VOID) { |
| 94 | 1058 fregv[freg]=0; regv[creg]=0; |
| 1059 } else { | |
| 1060 fregv[freg]=0; regv[creg]=1; | |
| 1061 } | |
| 105 | 1062 return ret_type; |
| 61 | 1063 } |
| 1064 | |
| 1065 void | |
| 1066 code_frame_pointer(int e3) { | |
| 1067 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1068 } | |
| 1069 | |
| 1070 | |
| 1071 void | |
| 62 | 1072 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1073 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1074 } | |
| 1075 | |
| 1076 | |
| 1077 void | |
| 1078 code_jmp(char *s) { | |
| 1079 printf("\tjmp %s\n",s); | |
| 1080 } | |
| 1081 | |
| 1082 | |
| 1083 void | |
| 1084 code_indirect_jmp(int e2) { | |
| 1085 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1086 } | |
| 1087 | |
| 94 | 1088 int |
| 61 | 1089 rindirect(int e1) /* *(p +5 ) */ |
| 1090 { | |
| 1091 char *op; | |
| 94 | 1092 int e2,e3,byte,t; |
| 61 | 1093 e3 = cadr(e2 = cadr(e1)); |
| 1094 g_expr(e2); | |
| 82 | 1095 switch (car(e1)) { |
| 1096 case FRINDIRECT: case DRINDIRECT: | |
| 1097 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); | |
| 94 | 1098 t=DOUBLE; |
| 82 | 1099 break; |
| 127 | 1100 case CRINDIRECT: case RINDIRECT: default: |
| 82 | 1101 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); |
| 61 | 1102 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1103 t=byte?CHAR:INT; |
| 82 | 1104 } |
| 94 | 1105 return t; |
| 61 | 1106 } |
| 1107 | |
| 1108 char * | |
| 1109 move(int byte) | |
| 1110 { | |
| 1111 return byte?"movb":"movl"; | |
| 1112 } | |
| 1113 | |
| 1114 void | |
| 103 | 1115 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1116 if (byte) use_data_reg(creg,1); |
| 109 | 1117 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1118 } |
| 1119 | |
| 1120 void | |
| 103 | 1121 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1122 if (byte) use_data_reg(creg,1); |
| 119 | 1123 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1124 } |
| 1125 | |
| 1126 void | |
| 111 | 1127 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1128 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1129 } | |
| 1130 | |
| 1131 void | |
| 118 | 1132 code_assign(int e2,int byte,int creg) { |
| 95 | 1133 if (byte) use_data_reg(creg,1); |
| 61 | 1134 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1135 regv[creg]=1; |
| 61 | 1136 } |
| 1137 | |
| 1138 void | |
| 1139 code_register_assop(int e2,int op,int byte) { | |
| 1140 int reg; | |
| 1141 int xreg = creg; | |
| 1142 creg = reg = e2; | |
| 1143 tosop(op,xreg); | |
| 1144 creg = xreg; | |
| 1145 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 144 | 1146 regv[creg]=1; |
| 61 | 1147 } |
| 1148 | |
| 1149 | |
| 1150 void | |
| 1151 code_assop(int op,int byte) { | |
| 1152 char *xrn; | |
| 1153 int xreg; | |
| 1154 int edx = edx_setup(); | |
| 1155 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1156 regv[xreg]=regs[xreg]=1; | |
| 1157 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1158 regv[edx]=1; | |
| 1159 ld_indexx(byte,0,edx); | |
| 1160 tosop(op,xreg); | |
| 1161 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); | |
| 1162 edx_cleanup(); | |
| 1163 emit_pop_free(xreg); | |
| 144 | 1164 regv[creg]=1; |
| 61 | 1165 } |
| 1166 | |
| 1167 | |
| 1168 void | |
| 1169 tosop(int op,int oreg) | |
| 1170 { | |
| 1171 int dx; | |
| 1172 char *orn,*crn; | |
| 1173 | |
| 1174 switch(op) { | |
| 1175 case LSHIFT: | |
| 1176 case ULSHIFT: | |
| 1177 shift("sall",oreg); | |
| 144 | 1178 regv[creg]=1; |
| 61 | 1179 return; |
| 1180 case RSHIFT: | |
| 1181 shift("sarl",oreg); | |
| 144 | 1182 regv[creg]=1; |
| 61 | 1183 return; |
| 1184 case URSHIFT: | |
| 1185 shift("shrl",oreg); | |
| 144 | 1186 regv[creg]=1; |
| 61 | 1187 return; |
| 1188 } | |
| 1189 if(oreg==-1) { | |
| 1190 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1191 oreg = dreg; | |
| 1192 regv[dreg]=1; | |
| 94 | 1193 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1194 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1195 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1196 oreg = dreg; |
| 1197 regv[dreg]=1; | |
| 61 | 1198 } |
| 1199 regv[oreg]=1; regs[oreg]=1; | |
| 1200 orn = register_name(oreg,0); | |
| 1201 crn = register_name(creg,0); | |
| 1202 switch(op) { | |
| 1203 case ADD: | |
| 1204 printf("\taddl %s,%s\n",orn,crn); | |
| 1205 break; | |
| 89 | 1206 case SUB: case CMP: |
| 61 | 1207 printf("\tsubl %s,%s\n",orn,crn); |
| 1208 break; | |
| 1209 case BAND: | |
| 1210 printf("\tandl %s,%s\n",orn,crn); | |
| 1211 break; | |
| 1212 case EOR: | |
| 1213 printf("\txorl %s,%s\n",orn,crn); | |
| 1214 break; | |
| 1215 case BOR: | |
| 1216 printf("\torl %s,%s\n",orn,crn); | |
| 1217 break; | |
| 1218 case MUL: | |
| 1219 case UMUL: | |
| 1220 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1221 break; | |
| 1222 case DIV: | |
| 1223 case UDIV: | |
| 1224 use_register(creg,REG_EAX,1); | |
| 1225 edx_setup(); | |
| 1226 orn = register_name(oreg,0); | |
| 1227 if (op==DIV) | |
| 127 | 1228 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1229 else |
| 127 | 1230 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1231 edx_cleanup(); |
| 1232 break; | |
| 1233 case MOD: | |
| 1234 case UMOD: | |
| 1235 use_register(creg,REG_EAX,1); | |
| 1236 edx_setup(); | |
| 1237 orn = register_name(oreg,0); | |
| 1238 if (op==DIV) | |
| 127 | 1239 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1240 else |
| 127 | 1241 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1242 dx = virtual(REG_EDX); |
| 1243 if (dx!=creg) { | |
| 1244 rname[dx]=rname[creg]; | |
| 1245 rname[creg]=REG_EDX; | |
| 1246 } | |
| 1247 edx_cleanup(); | |
| 1248 break; | |
| 1249 } | |
| 1250 if (oreg!=dreg&&oreg>=0) | |
| 1251 free_register(oreg); | |
| 94 | 1252 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1253 regv[creg]=1; |
| 61 | 1254 } |
| 1255 | |
| 1256 static int edx_stack=0; | |
| 1257 | |
| 1258 int | |
| 1259 edx_setup() | |
| 1260 { | |
| 1261 int edx_save; | |
| 1262 /* make real EDX register empty */ | |
| 137 | 1263 if (free_register_count(0)<1) { |
| 61 | 1264 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1265 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1266 edx_stack = list3(edx_save,edx_stack,0); | |
| 1267 } else { | |
| 1268 edx_save = get_register(); | |
| 1269 edx_stack = list3(edx_save,edx_stack,1); | |
| 1270 } | |
| 1271 regv[edx_save]=0; | |
| 1272 use_register(edx_save,REG_EDX,0); | |
| 1273 return edx_save; | |
| 1274 } | |
| 1275 | |
| 1276 | |
| 1277 void | |
| 1278 edx_cleanup() | |
| 1279 { | |
| 1280 if (caddr(edx_stack)==0) { | |
| 1281 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1282 } else | |
| 1283 free_register(car(edx_stack)); | |
| 1284 edx_stack = cadr(edx_stack); | |
| 1285 } | |
| 1286 | |
| 1287 void | |
| 1288 shift(char *op, int reg) | |
| 1289 { | |
| 1290 if (reg>=0) { | |
| 1291 use_register(reg,REG_ECX,1); | |
| 103 | 1292 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1293 use_register(dreg,REG_ECX,0); | |
| 119 | 1294 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1295 reg = dreg; |
| 1296 regv[dreg]=0; | |
| 61 | 1297 } else { |
| 1298 use_register(dreg,REG_ECX,0); | |
| 1299 printf("\tpopl %%ecx\n"); | |
| 103 | 1300 regv[dreg]=0; |
| 61 | 1301 } |
| 1302 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1303 } | |
| 1304 | |
| 1305 void | |
| 1306 ld_indexx(int byte, int n, int xreg) | |
| 1307 { | |
| 1308 char *op; | |
| 1309 | |
| 1310 op = byte ? "movsbl" : "movl"; | |
| 1311 if (n) | |
| 95 | 1312 printf("\t%s %d(%s),%s\n",op,n, |
| 1313 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1314 else |
| 95 | 1315 printf("\t%s (%s),%s\n",op, |
| 1316 register_name(xreg,0),register_name(creg,byte)); | |
| 1317 } | |
| 1318 | |
| 1319 int | |
| 1320 code_csvalue() | |
| 1321 { | |
| 123 | 1322 return rname[creg]; /* for switch value */ |
| 61 | 1323 } |
| 1324 | |
| 1325 void | |
| 95 | 1326 code_cmpdimm(int e, int csreg) |
| 61 | 1327 { |
| 1328 /* used in dosiwtch() */ | |
| 66 | 1329 if(chk) return; |
| 123 | 1330 use_register(creg,csreg,0); |
| 61 | 1331 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1332 } | |
| 1333 | |
| 1334 void | |
| 66 | 1335 code_opening(char *filename) |
| 61 | 1336 { |
| 1337 printf("\t.file \"%s\"\n",filename); | |
| 1338 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1339 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1340 printf(".text\n"); |
| 1341 } | |
| 1342 | |
| 1343 void | |
| 66 | 1344 code_closing() |
| 61 | 1345 { |
| 78 | 1346 global_table(); |
| 61 | 1347 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1348 } | |
| 1349 | |
| 1350 void | |
| 89 | 1351 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1352 { |
| 89 | 1353 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1354 printf("\tj%s\t_%d\n",s,l1); |
| 1355 } | |
| 1356 | |
| 82 | 1357 |
| 1358 void | |
| 61 | 1359 jcond(int l, char cond) |
| 1360 { | |
| 66 | 1361 if (chk) return; |
| 61 | 1362 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1363 } | |
| 1364 | |
| 1365 void | |
| 1366 jmp(int l) | |
| 1367 { | |
| 1368 control=0; | |
| 66 | 1369 if (chk) return; |
| 61 | 1370 printf("\tjmp\t_%d\n",l); |
| 1371 /* align? */ | |
| 1372 /* | |
| 1373 this is not allowed because of ? operator | |
| 1374 regv[creg]=regv[dreg]=0; | |
| 1375 use_register(creg,REG_EAX,0); | |
| 1376 use_register(dreg,REG_EBX,0); | |
| 1377 */ | |
| 1378 } | |
| 1379 | |
| 1380 void | |
| 1381 gen_comment(char *s) | |
| 1382 { | |
| 66 | 1383 if (chk) return; |
| 1384 printf("## %s",s); | |
| 61 | 1385 } |
| 1386 | |
| 1387 | |
| 1388 void | |
| 1389 code_enter(char *name) | |
| 1390 { | |
| 1391 printf("\t.align 4\n"); | |
| 1392 if (stmode!=STATIC) | |
| 1393 printf(".globl %s\n",name); | |
| 1394 printf("\t.type\t%s,@function\n",name); | |
| 1395 printf("%s:\n",name); | |
| 1396 } | |
| 1397 | |
| 77 | 1398 |
| 61 | 1399 void |
| 1400 code_enter1(int args) | |
| 1401 { | |
| 1402 code_disp_label=fwdlabel(); | |
| 1403 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1404 | |
| 1405 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1406 } | |
| 1407 | |
| 1408 void | |
| 1409 code_leave(char *name) | |
| 1410 { | |
| 63 | 1411 disp&= -size_of_int; |
| 61 | 1412 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1413 printf("_%d:\n",labelno); | |
| 1414 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1415 local_table(); | |
| 1416 labelno++; | |
| 1417 free_all_register(); | |
| 1418 } | |
| 1419 | |
| 1420 void | |
| 1421 enter(char *name) | |
| 1422 { | |
| 1423 printf("\t.align 2\n"); | |
| 1424 if (stmode!=STATIC) | |
| 1425 printf(".globl %s\n",name); | |
| 1426 printf("%s:\n",name); | |
| 1427 printf("\t.type\t%s,@function\n",name); | |
| 1428 printf("\tpushl %%ebp\n"); | |
| 1429 printf("\tmovl %%esp,%%ebp\n"); | |
| 1430 printf("\tpushl %%ebx\n"); | |
| 1431 printf("\tpushl %%esi\n"); | |
| 1432 printf("\tpushl %%edi\n"); | |
| 1433 } | |
| 1434 | |
| 1435 void | |
| 1436 enter1() | |
| 1437 { | |
| 1438 func_disp_label=fwdlabel(); | |
| 1439 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1440 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1441 } | |
| 1442 | |
| 1443 void | |
| 1444 leave(int control, char *name) | |
| 1445 { | |
| 128 | 1446 int sz; |
| 1447 | |
| 1448 disp &= -size_of_int; | |
| 61 | 1449 if (control) |
| 108 | 1450 code_set_return_register(1); |
| 61 | 1451 if (retcont) { |
| 1452 if (control) | |
| 1453 jmp(retlabel); | |
| 1454 fwddef(retcont); | |
| 128 | 1455 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1456 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1457 } else if (cadr(fnptr->ty)>0&&( | |
| 1458 car(cadr(fnptr->ty))==STRUCT || | |
| 1459 car(cadr(fnptr->ty))==UNION)) { | |
| 1460 sz = size(cadr(fnptr->ty)); | |
| 1461 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1462 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1463 register_name(creg,0)); | |
| 1464 emit_copy(dreg,creg,sz,0,1,1); | |
| 1465 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1466 use_register(creg,REG_EAX,0); | |
| 1467 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1468 } | |
| 61 | 1469 } |
| 1470 fwddef(retlabel); | |
| 63 | 1471 |
| 61 | 1472 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1473 printf("\tpopl %%edi\n"); | |
| 1474 printf("\tpopl %%esi\n"); | |
| 1475 printf("\tpopl %%ebx\n"); | |
| 1476 printf("\tleave\n"); | |
| 1477 printf("\tret\n"); | |
| 1478 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1479 printf("_%d:\n",labelno); | |
| 1480 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1481 local_table(); | |
| 1482 labelno++; | |
| 1483 free_all_register(); | |
| 1484 } | |
| 1485 | |
| 1486 | |
| 1487 void | |
| 108 | 1488 code_set_fixed_creg(int mode,int type) { |
| 1489 if (type==FLOAT||type==DOUBLE) { | |
| 1490 } else | |
| 1491 use_register(creg,REG_EAX,mode); | |
| 61 | 1492 } |
| 1493 | |
| 1494 void | |
| 107 | 1495 code_set_return_register(int mode) { |
| 1496 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1497 } else { | |
| 1498 use_register(creg,REG_EAX,mode); | |
| 1499 } | |
| 1500 } | |
| 1501 | |
| 1502 void | |
| 61 | 1503 gen_gdecl(char *n, int gpc) |
| 1504 { | |
| 1505 /* | |
| 1506 if (stmode!=STATIC) | |
| 1507 printf(".globl %s\n",n); | |
| 1508 */ | |
| 1509 } | |
| 1510 | |
| 1511 void | |
| 1512 align(int t) | |
| 1513 { | |
| 1514 if (t!=CHAR) { | |
| 1515 if (data_alignment & 1) | |
| 1516 printf("\t.align 2\n"); | |
| 1517 data_alignment = 0; | |
| 1518 } | |
| 1519 } | |
| 1520 | |
| 1521 void | |
| 1522 emit_data(int e, int t, NMTBL *n) | |
| 1523 { | |
| 1524 int l; | |
| 82 | 1525 double d; |
| 1526 float f; | |
| 61 | 1527 char *name; |
| 1528 name = n->nm; | |
| 1529 if(mode!=GDECL) { | |
| 1530 error(-1); return; | |
| 1531 } | |
| 66 | 1532 if (chk) return; |
| 61 | 1533 if (n->dsp != -1) { |
| 1534 n->dsp = -1; /* initiallized flag */ | |
| 1535 printf(".globl\t%s\n",name); | |
| 1536 data_mode(name); | |
| 1537 align(t); | |
| 1538 printf("%s:\n",name); | |
| 1539 } else { | |
| 1540 data_mode(0); | |
| 1541 } | |
| 1542 if(car(e)==CONST) { | |
| 1543 if (t==CHAR) { | |
| 1544 printf("\t.byte %d\n",cadr(e)); | |
| 1545 if (data_alignment>0) | |
| 1546 data_alignment++; | |
| 1547 gpc += 1; | |
| 82 | 1548 } else if (t==SHORT) { |
| 1549 printf("\t.word %d\n",cadr(e)); | |
| 1550 if (data_alignment>0) data_alignment++; | |
| 1551 gpc += 2; | |
| 61 | 1552 } else { |
| 1553 printf("\t.long %d\n",cadr(e)); | |
| 1554 gpc += size_of_int; | |
| 1555 } | |
| 82 | 1556 } else if(t==DOUBLE) { |
| 1557 d = dcadr(e); | |
| 1558 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1559 } else if(t==FLOAT) { | |
| 1560 f = dcadr(e); | |
| 1561 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1562 } else if(t!=CHAR) { |
| 1563 gpc += size_of_int; | |
| 1564 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1565 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1566 } else if(car(e)==GVAR) { | |
| 1567 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1568 } else if(car(e)==FNAME) { |
| 1569 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1570 } else if(car(e)==STRING) { | |
| 1571 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1572 l = fwdlabel(); | |
| 1573 printf("\t.long _%d\n",l); | |
| 1574 printf(".section\t.rodata\n"); | |
| 1575 printf("_%d:\n",l); | |
| 1576 output_mode = RODATA_EMIT_MODE; | |
| 1577 } | |
| 1578 ascii((char *)cadr(e)); | |
| 1579 } else error(TYERR); | |
| 1580 } | |
| 1581 } | |
| 1582 | |
| 1583 void | |
| 1584 emit_data_closing(NMTBL *n) | |
| 1585 { | |
| 1586 int lb; | |
| 66 | 1587 if (chk) return; |
| 61 | 1588 if (mode==GDECL) { |
| 1589 data_mode(0); | |
| 1590 lb=fwdlabel(); | |
| 1591 printf("_%d:\n",lb); | |
| 1592 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1593 } | |
| 1594 } | |
| 1595 | |
| 1596 void | |
| 1597 global_table(void) | |
| 1598 { | |
| 1599 NMTBL *n; | |
| 1600 int init; | |
| 1601 init=0; | |
| 1602 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1603 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1604 /* n->dsp = -1 means initialized global */ |
| 1605 if (init==0) { | |
| 1606 data_mode(0); | |
| 1607 init=1; | |
| 1608 } | |
| 1609 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1610 } | |
| 1611 } | |
| 1612 } | |
| 1613 | |
| 1614 void | |
| 1615 local_table(void) | |
| 1616 { | |
| 1617 NMTBL *n; | |
| 1618 int init; | |
| 1619 init=0; | |
| 1620 /* static local variables */ | |
| 1621 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1622 if (n->sc == GVAR) { | |
| 1623 if (init==0) { | |
| 1624 data_mode(0); | |
| 1625 init=1; | |
| 1626 } | |
| 1627 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 1628 } | |
| 1629 } | |
| 1630 } | |
| 1631 | |
| 1632 void | |
| 1633 text_mode(void) | |
| 1634 { | |
| 1635 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1636 printf(".text\n"); | |
| 1637 printf("\t.align 2\n"); | |
| 1638 output_mode = TEXT_EMIT_MODE; | |
| 1639 } | |
| 1640 } | |
| 1641 | |
| 1642 void | |
| 1643 data_mode(char *name) | |
| 1644 { | |
| 1645 if (output_mode!=DATA_EMIT_MODE) { | |
| 1646 printf(".data\n"); | |
| 1647 output_mode = DATA_EMIT_MODE; | |
| 1648 } | |
| 1649 if (name) | |
| 1650 printf("\t.type\t%s,@object\n",name); | |
| 1651 } | |
| 1652 | |
| 81 | 1653 /* floating point */ |
| 1654 | |
| 1655 | |
| 82 | 1656 char * |
| 1657 fstore(int d) | |
| 1658 { | |
| 83 | 1659 return use? |
| 1660 (d?"fstl":"fsts"): | |
| 1661 (d?"fstpl":"fstps") | |
| 1662 ; | |
| 1663 } | |
| 1664 | |
| 1665 char * | |
| 1666 fstore_u(int d) | |
| 1667 { | |
| 82 | 1668 return d?"fstpl":"fstps"; |
| 1669 } | |
| 81 | 1670 |
| 82 | 1671 char * |
| 1672 fload(int d) | |
| 1673 { | |
| 1674 return d?"fldl":"flds"; | |
| 1675 } | |
| 81 | 1676 |
| 1677 | |
| 103 | 1678 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1679 { |
| 109 | 1680 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1681 } |
| 1682 | |
| 103 | 1683 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1684 { |
| 119 | 1685 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1686 } |
| 1687 | |
| 138 | 1688 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1689 { |
| 1690 error(-1); | |
| 1691 } | |
| 1692 | |
| 103 | 1693 void code_dassign(int e2,int freg,int d) |
| 82 | 1694 { |
| 1695 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1696 } | |
| 1697 | |
| 1698 static double d0 = 1.0; | |
| 81 | 1699 |
| 82 | 1700 int |
| 1701 code_d1(double d) | |
| 1702 { | |
| 1703 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1704 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1705 } | |
| 1706 | |
| 1707 int | |
| 1708 code_d2(double d) | |
| 1709 { | |
| 1710 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1711 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1712 } | |
| 1713 | |
| 138 | 1714 void code_dconst(int e2,int freg,int d) |
| 82 | 1715 { |
| 1716 int lb; | |
| 138 | 1717 double value = dcadr(e2); |
| 81 | 1718 |
| 138 | 1719 if (value==0.0) { |
| 82 | 1720 printf("\tfldz\n"); return; |
| 1721 } | |
| 138 | 1722 if (value==1.0) { |
| 82 | 1723 printf("\tfld1\n"); return; |
| 1724 } | |
| 1725 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1726 lb=fwdlabel(); | |
| 1727 printf("_%d:\n",lb); | |
| 138 | 1728 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1729 if (output_mode==TEXT_EMIT_MODE) { |
| 1730 printf(".text\n"); | |
| 1731 } else { | |
| 1732 text_mode(); | |
| 1733 } | |
| 1734 printf("\tfldl _%d\n",lb); | |
| 1735 } | |
| 1736 | |
| 138 | 1737 void code_dneg(int freg,int d) |
| 82 | 1738 { |
| 1739 printf("\tfchs\n"); | |
| 1740 } | |
| 81 | 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 | |
| 138 | 1804 void code_cmp_drgvar(int e2,int d) |
| 82 | 1805 { |
| 109 | 1806 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1807 } |
| 1808 | |
| 138 | 1809 void code_cmp_drlvar(int e2,int d) |
| 82 | 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 |
| 138 | 1899 code_dregister(int e2,int freg,int d) |
| 94 | 1900 { |
| 1901 error(-1); | |
| 1902 } | |
| 1903 | |
| 138 | 1904 void |
| 1905 code_cmp_dregister(int e2,int d) | |
| 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 |
| 138 | 1918 emit_dpop(int d) |
| 94 | 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 | |
| 138 | 1933 void emit_dpop_free(int e1,int d) |
| 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 */ |