Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 166:9e55cc5551fb
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| author | kono |
|---|---|
| date | Mon, 24 Nov 2003 13:09:14 +0900 |
| parents | 6409ff6bc219 |
| children | 0197ca125567 |
| 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; |
| 165 | 19 int size_of_short = 2; |
| 119 | 20 int size_of_float = 4; |
| 21 int size_of_double = 8; | |
| 22 int size_of_longlong = 8; | |
| 23 int endian = 0; | |
| 24 int MAX_REGISTER=6; /* intel386のレジスタを6つまで使う*/ | |
| 25 #define REAL_MAX_REGISTER 8 /* intel386のレジスタが8つということ*/ | |
| 26 int MAX_DATA_REG=4; | |
| 27 int MAX_POINTER=3; | |
| 28 int MAX_REGISTGER_VAR=2; | |
| 29 int MAX_FREGISTER=1; | |
| 30 | |
| 31 #define MAX_FPU_STACK 7 | |
| 32 | |
| 33 int MAX_INPUT_REGISTER_VAR = 0; | |
| 34 int MAX_CODE_INPUT_REGISTER_VAR = 2; | |
| 35 int MAX_INPUT_DREGISTER_VAR = 0; | |
| 138 | 36 int MAX_INPUT_FREGISTER_VAR = 0; |
| 119 | 37 int MAX_CODE_INPUT_DREGISTER_VAR = 0; |
| 61 | 38 |
| 138 | 39 int reg_sp; /* REGister Stack-Pointer */ |
| 40 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 41 | |
| 42 /* floating point registers */ | |
| 43 | |
| 44 int freg_sp; /* floating point REGister Stack-Pointer */ | |
| 45 int freg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 46 | |
| 47 | |
| 61 | 48 /* |
| 128 | 49 -28 -8 local2 |
| 50 -24 -4 local1 | |
| 51 -20 8 arg3 | |
| 52 -16 4 arg2 | |
| 53 -12 0 arg1 | |
| 54 local2 -20 4 -8 (%edi) | |
| 55 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 56 %edi -12 <- disp_offset %ebp |
| 57 %esi -8 | |
| 58 %ebx -4 | |
| 59 %ebp = %esp 0 | |
| 60 %eip 4 <- arg_offset | |
| 61 arg1 8 0 | |
| 62 arg2 12 4 | |
| 63 see enter/enter1/leave see code_enter | |
| 64 */ | |
| 65 int arg_offset = 8; | |
| 66 int disp_offset = -12; | |
| 67 int func_disp_offset = -12; | |
| 68 int code_disp_offset = 0; | |
| 69 int jump_offset = 0; | |
| 70 | |
| 119 | 71 static int code_disp_label; |
| 72 static int func_disp_label; | |
| 61 | 73 |
| 119 | 74 static int |
| 75 lvar(int l) | |
| 76 { | |
| 77 if (is_code(fnptr)) { | |
| 78 return l+code_disp_offset; | |
| 79 } else if (l<0) { | |
| 80 return l+disp_offset; | |
| 81 } else { | |
| 82 return l+arg_offset; | |
| 83 } | |
| 84 } | |
| 99 | 85 |
| 95 | 86 /* |
| 87 creg currrent virtual register | |
| 88 dreg spare virtual register | |
| 89 | |
| 90 rname[creg] currrent real register | |
| 91 rname[dreg] spare real register | |
| 92 | |
| 93 regs[] virtual register usage | |
| 94 regv[] value in virtual register flag | |
| 95 | |
| 96 reg_name[rname[creg]] | |
| 97 | |
| 98 freg current floating point register | |
| 99 fregv calue in floating point register | |
| 100 */ | |
| 101 | |
| 102 static int dreg; /* general temporal register */ | |
| 103 | |
| 104 int ia32regs[REAL_MAX_REGISTER]; | |
| 105 int ia32regv[REAL_MAX_REGISTER]; | |
| 106 int ia32rname[REAL_MAX_REGISTER]; | |
| 107 | |
| 108 int *regv = ia32regv; | |
| 109 int *regs = ia32regs; | |
| 110 static int *rname = ia32rname; | |
| 111 | |
| 112 int ia32fregs[1]; | |
| 113 int ia32fregv[1]; | |
| 114 | |
| 115 int freg; | |
| 116 int *fregv = ia32fregv; | |
| 117 int *fregs = ia32fregs; | |
| 118 | |
| 61 | 119 |
| 120 #define REG_EAX 0 | |
| 121 #define REG_EBX 1 | |
| 122 #define REG_ECX 2 | |
| 123 #define REG_EDX 3 | |
| 124 #define REG_ESI 4 | |
| 125 #define REG_EDI 5 | |
| 126 #define REG_EBP 6 | |
| 127 #define REG_ESP 7 | |
| 128 | |
| 129 | |
| 130 #define DATA_REG 0 | |
| 131 #define POINTER_REG 3 | |
| 132 static char *reg_name[8]; | |
| 133 static char *reg_name_l[4]; | |
| 134 static char *reg_name_w[4]; | |
| 135 | |
| 93 | 136 static void use_register(int virt, int real, int move); |
| 137 static int virtual(int real); | |
| 138 static void shift(char *op, int reg); | |
| 163 | 139 static void ld_indexx(int byte, int n, int xreg,int sign); |
| 93 | 140 static void data_mode(char *name); |
| 141 static int edx_setup(); | |
| 142 static void edx_cleanup(); | |
| 143 static void local_table(void); | |
| 144 static char * fload(int d); | |
| 145 static int code_d1(double d); | |
| 146 static int code_d2(double d); | |
| 94 | 147 static void code_save_stacks(); |
| 107 | 148 static void code_save_fstacks(); |
| 82 | 149 |
| 61 | 150 void |
| 151 code_init(void) | |
| 152 { | |
| 153 arg_offset = 8; | |
| 154 func_disp_offset = -12; | |
| 155 disp_offset = -12; | |
| 156 size_of_int = 4; | |
| 157 endian = 0; | |
| 158 MAX_REGISTER=6; | |
| 159 MAX_DATA_REG=4; | |
| 160 MAX_POINTER=3; | |
| 161 MAX_REGISTER_VAR=2; | |
| 162 | |
| 163 reg_name[REG_EAX] = "%eax"; | |
| 164 reg_name[REG_EBX] = "%ebx"; | |
| 165 reg_name[REG_ECX] = "%ecx"; | |
| 166 reg_name[REG_EDX] = "%edx"; | |
| 167 reg_name[REG_ESI] = "%esi"; | |
| 168 reg_name[REG_EDI] = "%edi"; | |
| 169 reg_name[REG_EBP] = "%ebp"; | |
| 170 reg_name[REG_ESP] = "%esp"; | |
| 171 reg_name_l[REG_EAX] = "%al"; | |
| 172 reg_name_l[REG_EBX] = "%bl"; | |
| 173 reg_name_l[REG_ECX] = "%cl"; | |
| 174 reg_name_l[REG_EDX] = "%dl"; | |
| 175 reg_name_w[REG_EAX] = "%ax"; | |
| 176 reg_name_w[REG_EBX] = "%bx"; | |
| 177 reg_name_w[REG_ECX] = "%cx"; | |
| 178 reg_name_w[REG_EDX] = "%dx"; | |
| 179 | |
| 180 } | |
| 181 | |
| 182 char * | |
| 183 register_name(int i,int byte) | |
| 184 { | |
| 185 if (i<0) { | |
| 186 error(REG_ERR); | |
| 187 return "%eax"; | |
| 188 } | |
| 165 | 189 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 190 return reg_name_l[rname[i]]; |
| 165 | 191 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 192 return reg_name_w[rname[i]]; | |
| 61 | 193 } else { |
| 194 return reg_name[rname[i]]; /* should be error */ | |
| 195 } | |
| 196 } | |
| 197 | |
| 147 | 198 int use_int(int i) { return i;} |
| 199 int use_float(int i) { return i;} | |
| 200 int use_double(int i) { return i;} | |
| 201 | |
| 61 | 202 void |
| 203 gexpr_code_init(void){ | |
| 204 use_register(creg,REG_EAX,0); | |
| 94 | 205 regv[creg]=0; |
| 61 | 206 regv[dreg]=0; |
| 207 } | |
| 208 | |
| 147 | 209 void |
| 210 code_gexpr(int e){ | |
| 211 } | |
| 212 | |
| 61 | 213 int |
| 214 register_var(int r) { | |
| 215 return virtual(r+REG_ESI); | |
| 216 } | |
| 217 | |
| 89 | 218 int |
| 219 get_register(void) | |
| 220 { /* 使われていないレジスタを調べる */ | |
| 221 int i; | |
| 222 for(i=0;i<MAX_REGISTER;i++) { | |
| 223 if (! regs[i]) { /* 使われていないなら */ | |
| 224 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 225 return i; /* その場所を表す番号を返す */ | |
| 226 } | |
| 227 } | |
| 228 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 229 } | |
| 230 | |
| 231 void | |
| 232 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 233 regv[i]=regs[i]=0; | |
| 234 } | |
| 235 | |
| 99 | 236 int |
| 126 | 237 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 238 { |
| 126 | 239 if (is_code) { |
| 240 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 241 i = virtual(i+REG_ESI); | |
| 242 regs[i]=regv[i]=1; | |
| 243 return list3(REGISTER,i,(int)nptr); | |
| 244 } else { | |
| 245 return 0; | |
| 246 } | |
| 99 | 247 } |
| 103 | 248 |
| 99 | 249 int |
| 138 | 250 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 251 { |
| 126 | 252 return 0; |
| 99 | 253 } |
| 254 | |
| 255 int | |
| 138 | 256 get_dregister(int d) |
| 99 | 257 { |
| 258 return -1; | |
| 259 } | |
| 260 | |
| 89 | 261 int |
| 262 register_full(void) | |
| 263 { | |
| 264 int i; | |
| 265 for(i=0;i<MAX_REGISTER;i++) { | |
| 266 if (! regs[i]) { | |
| 267 return 0; | |
| 268 } | |
| 269 } | |
| 270 return 1; | |
| 271 } | |
| 272 | |
| 273 int | |
| 137 | 274 free_register_count(int d) |
| 89 | 275 { |
| 276 int i,count; | |
| 277 count = 0; | |
| 278 for(i=0;i<MAX_REGISTER;i++) { | |
| 279 if (! regs[i] && ! regv[i]) count++; | |
| 280 } | |
| 137 | 281 return d?0:count; |
| 89 | 282 } |
| 283 | |
| 284 void | |
| 285 free_all_register(void) | |
| 286 { | |
| 287 int i; | |
| 288 for(i=0;i<MAX_REGISTER;i++) { | |
| 289 regs[i]=regv[i]=0; | |
| 290 } | |
| 291 creg = get_register(); | |
| 292 dreg = get_register(); | |
| 293 return; | |
| 294 } | |
| 295 | |
| 296 | |
| 297 void | |
| 298 register_usage(char *s) | |
| 299 { | |
| 300 int i; | |
| 301 if (chk) return; | |
| 302 printf("# %d: %s:",lineno,s); | |
| 303 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 304 for(i=0;i<MAX_REGISTER;i++) { | |
| 305 printf("%d",regs[i]); | |
| 306 } | |
| 307 printf(":"); | |
| 308 for(i=0;i<MAX_REGISTER;i++) { | |
| 309 printf("%d",regv[i]); | |
| 310 } | |
| 311 #if 0 | |
| 312 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 313 for(i=reg_sp;i>=0;i--) { | |
| 314 if(reg_stack[i]>=0) | |
| 315 printf(" %s",register_name(reg_stack[i],0)); | |
| 316 } | |
| 317 #endif | |
| 94 | 318 printf(" f:%d",freg_sp); |
| 89 | 319 printf("\n"); |
| 320 } | |
| 321 | |
| 109 | 322 void |
| 137 | 323 code_arg_register(NMTBL *fnptr) |
| 109 | 324 { |
| 137 | 325 int args = fnptr->dsp; |
| 326 NMTBL *n; | |
| 327 int reg_var = 0; | |
| 328 int freg_var = 0; | |
| 329 int type; | |
| 330 int reg; | |
| 331 int is_code0 = is_code(fnptr); | |
| 332 | |
| 333 while (args) { | |
| 334 /* process in reverse order */ | |
| 335 n = (NMTBL*)caddr(args); | |
| 336 type = n->ty; | |
| 337 if (scalar(type)) { | |
| 338 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 339 n->sc = REGISTER; | |
| 340 n->dsp = cadr(reg); | |
| 341 regv[n->dsp]= 1; | |
| 342 regs[n->dsp]= INPUT_REG; | |
| 343 reg_var++; | |
| 344 cadddr(args)=size_of_int; /* why we need this? */ | |
| 345 } | |
| 346 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 347 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 348 n->sc = DREGISTER; |
| 349 n->dsp = cadr(reg); | |
| 350 fregv[n->dsp]= 1; | |
| 351 fregs[n->dsp]= INPUT_REG; | |
| 352 freg_var++; | |
| 353 cadddr(args)=size(type); /* why we need this? */ | |
| 354 } | |
| 355 } | |
| 356 args = cadr(args); | |
| 357 } | |
| 109 | 358 } |
| 359 | |
| 89 | 360 void |
| 361 gexpr_init(void) | |
| 362 { | |
| 363 while(reg_sp > 0) { | |
| 94 | 364 if (reg_stack[--reg_sp]>=0) |
| 365 free_register(reg_stack[reg_sp]); | |
| 89 | 366 } |
| 94 | 367 freg_sp = 0; |
| 89 | 368 text_mode(); |
| 369 gexpr_code_init(); | |
| 370 register_usage("gexpr_init"); | |
| 371 } | |
| 372 | |
| 373 | |
| 374 void | |
| 375 emit_init(void) | |
| 376 { | |
| 377 int i; | |
| 378 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 379 free_all_register(); | |
| 380 reg_sp = 0; | |
| 94 | 381 freg_sp = 0; |
| 89 | 382 text_mode(); |
| 383 } | |
| 384 | |
| 385 int | |
| 386 virtual(int real) | |
| 387 { | |
| 388 int real_v,i; | |
| 389 real_v = -1; | |
| 390 for(i=0;i<MAX_REGISTER;i++) { | |
| 391 if (rname[i]==real) { | |
| 392 real_v=i; | |
| 393 break; | |
| 394 } | |
| 395 } | |
| 396 return real_v; | |
| 397 } | |
| 398 | |
| 399 int | |
| 400 pop_register(void) | |
| 401 { /* レジスタから値を取り出す */ | |
| 402 return reg_stack[--reg_sp]; | |
| 403 } | |
| 404 | |
| 405 void | |
| 406 emit_pop_free(int xreg) | |
| 407 { | |
| 159 | 408 if (xreg==dreg||xreg==creg) { |
| 89 | 409 regv[dreg]=0; |
| 98 | 410 } else if (xreg>=0) { |
| 89 | 411 free_register(xreg); |
| 412 } | |
| 413 } | |
| 414 | |
| 415 | |
| 61 | 416 int |
| 105 | 417 get_register_var(NMTBL *nptr) |
| 61 | 418 { |
| 419 int i; | |
| 420 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 421 if (! regs[i]) { /* 使われていないなら */ | |
| 422 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 423 regv[i]=0; | |
| 105 | 424 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 425 } |
| 426 } | |
| 104 | 427 return list2(LVAR,new_lvar(size_of_int)); |
| 428 } | |
| 429 | |
| 430 int | |
| 138 | 431 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 432 { |
| 138 | 433 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 434 } |
| 435 | |
| 61 | 436 void |
| 437 use_register(int virt, int real, int move) | |
| 438 { | |
| 439 int real_v; | |
| 440 char *move_op; | |
| 441 if (rname[virt]==real) | |
| 442 return; | |
| 443 real_v = virtual(real); | |
| 444 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 445 if (move || (regv[real_v])) { | |
| 446 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 447 } | |
| 448 rname[real_v] = rname[virt]; | |
| 449 rname[virt] = real; | |
| 450 } | |
| 451 | |
| 452 void | |
| 453 use_pointer(int virt, int move) | |
| 454 { | |
| 455 int i; | |
| 456 if (rname[virt]>=POINTER_REG) | |
| 457 return; | |
| 458 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 459 if (!regs[virtual(i)]) { | |
| 460 use_register(virt,i,move); | |
| 461 return; | |
| 462 } | |
| 463 } | |
| 464 /* we prefer EBX */ | |
| 465 use_register(virt,REG_EBX,move); | |
| 466 } | |
| 467 | |
| 468 void | |
| 469 use_data_reg(int virt, int move) | |
| 470 { | |
| 471 int i; | |
| 472 if (rname[virt]<MAX_DATA_REG) | |
| 473 return; | |
| 474 for(i=0;i<MAX_DATA_REG;i++) { | |
| 475 if (!regs[virtual(i)]) { | |
| 476 use_register(virt,i,move); | |
| 477 return; | |
| 478 } | |
| 479 } | |
| 480 /* we prefer EBX */ | |
| 481 use_register(virt,REG_EBX,move); | |
| 482 } | |
| 483 | |
| 484 | |
| 485 void | |
| 107 | 486 emit_push() |
| 61 | 487 { |
| 488 int new_reg; | |
| 489 new_reg = get_register(); | |
| 159 | 490 if (new_reg==creg) error(-1); |
| 61 | 491 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 492 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 493 reg_stack[reg_sp++] = -1; |
| 494 printf("\tpushl %s\n",register_name(creg,0)); | |
| 495 /* creg is used soon, don't regv[creg]=0 */ | |
| 496 } else { | |
| 497 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 498 creg = new_reg; | |
| 499 regv[creg]=1; | |
| 500 } | |
| 501 } | |
| 502 | |
| 503 int | |
| 504 emit_pop(int type) | |
| 505 { | |
| 506 int xreg; | |
| 507 if ((xreg=pop_register())==-1) { | |
| 508 if (type==POINTER_REG) | |
| 509 use_pointer(dreg,0); | |
| 510 else if (type==DATA_REG) | |
| 511 use_data_reg(dreg,0); | |
| 512 if (regv[dreg]) { | |
| 513 printf("# emit_pop dreg conflict\n"); | |
| 94 | 514 error(-1); |
| 61 | 515 } |
| 516 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 517 regv[dreg]=1; |
| 518 return dreg; | |
| 519 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 520 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 521 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 522 regv[dreg]=1; |
| 523 return dreg; | |
| 524 } | |
| 61 | 525 return xreg; |
| 526 } | |
| 527 | |
| 92 | 528 void |
| 529 code_label(int labelno) | |
| 530 { | |
| 531 printf("_%d:\n",labelno); | |
| 532 } | |
| 61 | 533 |
| 534 void | |
| 107 | 535 code_gvar(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 | |
| 541 void | |
| 107 | 542 code_rgvar(int e1,int creg) { |
| 109 | 543 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 544 regv[creg]=1; |
| 61 | 545 } |
| 166 | 546 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 547 void |
| 165 | 548 code_crgvar(int e1,int creg,int sign,int sz){ |
| 549 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 550 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 551 regv[creg]=1; |
| 61 | 552 } |
| 553 | |
| 554 | |
| 555 void | |
| 107 | 556 code_lvar(int e2,int creg) { |
| 119 | 557 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 558 regv[creg]=1; |
| 61 | 559 } |
| 560 | |
| 561 | |
| 562 void | |
| 107 | 563 code_register(int e2,int creg) { |
| 61 | 564 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 565 regv[creg]=1; |
| 61 | 566 } |
| 567 | |
| 568 | |
| 569 void | |
| 94 | 570 code_rlvar(int e2,int reg) { |
| 119 | 571 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 572 regv[creg]=1; |
| 61 | 573 } |
| 574 | |
| 575 | |
| 576 void | |
| 165 | 577 code_crlvar(int e2,int reg,int sign,int sz) { |
| 578 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 579 regv[creg]=1; |
| 61 | 580 } |
| 581 | |
| 582 | |
| 583 void | |
| 109 | 584 code_fname(NMTBL *n,int creg) { |
| 585 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 586 regv[creg]=1; |
| 61 | 587 } |
| 588 | |
| 589 | |
| 590 void | |
| 107 | 591 code_const(int e2,int creg) { |
| 61 | 592 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 593 regv[creg]=1; |
| 61 | 594 } |
| 595 | |
| 596 | |
| 597 void | |
| 107 | 598 code_neg(int creg) { |
| 61 | 599 printf("\tnegl %s\n", register_name(creg,0)); |
| 600 } | |
| 601 | |
| 602 | |
| 603 void | |
| 107 | 604 code_not(int creg) { |
| 61 | 605 printf("\tnotl %s\n", register_name(creg,0)); |
| 606 } | |
| 607 | |
| 608 | |
| 609 void | |
| 107 | 610 code_lnot(int creg) { |
| 61 | 611 char *xrn; |
| 612 use_data_reg(creg,1); | |
| 613 xrn = register_name(creg,1); | |
| 614 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 615 printf("\tsete %s\n", xrn); | |
| 616 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 617 } | |
| 618 | |
| 619 void | |
| 107 | 620 code_preinc(int e1,int e2,int reg) { |
| 61 | 621 char *xrn; |
| 622 if (car(e2)==REGISTER) { | |
| 623 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 107 | 624 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 625 regv[reg]=1; | |
| 61 | 626 return; |
| 627 } | |
| 628 g_expr(e2); | |
| 629 xrn = register_name(creg,0); | |
| 630 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 631 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 632 } | |
| 633 | |
| 634 | |
| 635 void | |
| 107 | 636 code_postinc(int e1,int e2,int reg) { |
| 61 | 637 char *xrn; |
| 638 if (car(e2)==REGISTER) { | |
| 107 | 639 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 61 | 640 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 641 regv[reg]=1; |
| 61 | 642 return; |
| 643 } | |
| 644 g_expr(e2); | |
| 645 emit_push(); | |
| 646 xrn = register_name((e2=emit_pop(0)),0); | |
| 647 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); | |
| 648 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 649 emit_pop_free(e2); | |
| 650 } | |
| 651 | |
| 652 | |
| 653 void | |
| 165 | 654 code_cpostinc(int e1,int e2,int reg,int sign,int sz) { |
| 61 | 655 char *xrn; |
| 656 if (car(e2)==REGISTER) { | |
| 165 | 657 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(cadr(e2),0), |
| 107 | 658 register_name(reg,0)); |
| 61 | 659 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 660 regv[reg]=1; |
| 61 | 661 return; |
| 662 } | |
| 663 g_expr(e2); | |
| 664 emit_push(); | |
| 665 xrn = register_name((e2=emit_pop(0)),1); | |
| 165 | 666 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 667 printf("\taddl $%d,(%s)\n",sz,xrn); | |
| 61 | 668 emit_pop_free(e2); |
| 669 } | |
| 670 | |
| 671 | |
| 672 void | |
| 165 | 673 code_cpreinc(int e1,int e2,int reg,int sign,int sz) { |
| 61 | 674 if (car(e2)==REGISTER) { |
| 675 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 165 | 676 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(cadr(e2),0), |
| 107 | 677 register_name(reg,0)); |
| 678 regv[reg]=1; | |
| 61 | 679 return; |
| 680 } | |
| 681 g_expr(e2); | |
| 165 | 682 printf("\taddl $%d,(%s)\n",sz,register_name(creg,0)); |
| 683 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(creg,0),register_name(creg,0)); | |
| 61 | 684 } |
| 685 | |
| 686 | |
| 687 void | |
| 165 | 688 code_cpostdec(int e1,int e2,int reg,int sign,int sz) { |
| 61 | 689 if (car(e2)==REGISTER) { |
| 165 | 690 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(cadr(e2),0), |
| 107 | 691 register_name(reg,0)); |
| 165 | 692 printf("\tsubl $%d,(%s)\n",sz,register_name(cadr(e2),0)); |
| 107 | 693 regv[reg]=1; |
| 61 | 694 return; |
| 695 } | |
| 696 g_expr(e2); | |
| 166 | 697 printf("\t%s (%s),%s\n",sign?"movsbl":"movzbl",register_name(creg,0),register_name(creg,0)); |
| 165 | 698 printf("\tsubl $%d,(%s)\n",sz,register_name(creg,0)); |
| 61 | 699 } |
| 700 | |
| 701 | |
| 702 void | |
| 165 | 703 code_cpredec(int e1,int e2,int reg,int sign,int sz) { |
| 61 | 704 if (car(e2)==REGISTER) { |
| 165 | 705 printf("\tsubl $%d,(%s)\n",sz,register_name(cadr(e2),0)); |
| 706 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(cadr(e2),0), | |
| 107 | 707 register_name(reg,0)); |
| 708 regv[reg]=1; | |
| 709 return; | |
| 61 | 710 } |
| 711 g_expr(e2); | |
| 712 emit_push(); | |
| 713 e2 = emit_pop(0); | |
| 165 | 714 printf("\tsubl $%d,(%s)\n",sz,register_name(e2,0)); |
| 715 printf("\t%s (%s),%s\n",cload(sign,sz),register_name(e2,0),register_name(creg,0)); | |
| 61 | 716 emit_pop_free(e2); |
| 717 } | |
| 718 | |
| 719 | |
| 720 void | |
| 107 | 721 code_return(int creg) { |
| 61 | 722 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 723 regv[creg]=1; |
| 61 | 724 } |
| 725 | |
| 726 | |
| 727 void | |
| 107 | 728 code_environment(int creg) { |
| 61 | 729 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 730 regv[creg]=1; |
| 61 | 731 } |
| 732 | |
| 733 | |
| 734 void | |
| 116 | 735 code_bool(int e1) { |
| 61 | 736 char *xrn; |
| 737 int e2,e3; | |
| 738 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 739 xrn = register_name(creg,0); | |
| 740 printf("\txorl %s,%s\n",xrn,xrn); | |
| 741 jmp(e3=fwdlabel()); | |
| 742 fwddef(e2); | |
| 743 printf("\tmovl $1,%s\n",xrn); | |
| 744 fwddef(e3); | |
| 107 | 745 regv[creg]=1; |
| 61 | 746 } |
| 747 | |
| 748 char * | |
| 749 code_gt(int cond) { | |
| 750 return (cond?"g":"le"); | |
| 751 } | |
| 752 | |
| 753 char * | |
| 754 code_ugt(int cond) { | |
| 755 return (cond?"a":"be"); | |
| 756 } | |
| 757 | |
| 758 char * | |
| 759 code_ge(int cond) { | |
| 760 return (cond?"ge":"l"); | |
| 761 } | |
| 762 | |
| 763 char * | |
| 764 code_uge(int cond) { | |
| 765 return (cond?"ae":"b"); | |
| 766 } | |
| 767 | |
| 768 char * | |
| 769 code_eq(int cond) { | |
| 770 return (cond?"e":"ne"); | |
| 771 } | |
| 772 | |
| 773 void | |
| 774 code_cmp_crgvar(int e1) { | |
| 109 | 775 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 776 } |
| 777 | |
| 778 | |
| 779 void | |
| 780 code_cmp_crlvar(int e1) { | |
| 119 | 781 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 782 } |
| 783 | |
| 784 | |
| 785 void | |
| 786 code_cmp_rgvar(int e1) { | |
| 109 | 787 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 788 } |
| 789 | |
| 790 | |
| 791 void | |
| 792 code_cmp_rlvar(int e1) { | |
| 119 | 793 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 794 } |
| 795 | |
| 796 | |
| 797 void | |
| 798 code_cmp_register(int e2) { | |
| 799 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 800 } | |
| 801 | |
| 802 | |
| 803 void | |
| 804 ascii(char *s) | |
| 805 { | |
| 806 printf("\t.string \""); | |
| 807 while(*s) { | |
| 808 if (*s=='\n') | |
| 809 printf("%cn",92); | |
| 810 else if (*s<' ') | |
| 811 printf("%c%03o",92,*s); | |
| 812 else if (*s==34) | |
| 813 printf("%c%c",92,34); | |
| 814 else | |
| 815 printf("%c",*s); | |
| 816 s++; | |
| 817 } | |
| 818 printf("%c\n",34); | |
| 819 } | |
| 820 | |
| 821 void | |
| 107 | 822 code_string(int e1,int creg) |
| 61 | 823 { |
| 824 char *s; | |
| 825 int i,lb; | |
| 826 | |
| 827 if (0) { | |
| 828 s=(char *)cadr(e1); | |
| 829 lb=fwdlabel(); | |
| 830 printf("\tjmp _%d\n",lb); | |
| 831 i=backdef(); | |
| 832 ascii(s); | |
| 833 printf("\t.align 2\n"); | |
| 834 fwddef(lb); | |
| 835 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 836 } else { | |
| 837 s=(char *)cadr(e1); | |
| 838 printf(".section\t.rodata\n"); | |
| 839 lb=fwdlabel(); | |
| 840 printf("_%d:\n",lb); | |
| 841 ascii(s); | |
| 842 if (output_mode==TEXT_EMIT_MODE) { | |
| 843 printf(".text\n"); | |
| 844 } else { | |
| 845 text_mode(); | |
| 846 } | |
| 847 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 848 } | |
| 849 } | |
| 850 | |
| 851 #define MAX_COPY_LEN 20 | |
| 852 | |
| 853 void | |
| 854 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 855 { | |
| 856 int fix = 0; | |
| 857 /* length <0 means upward direction copy */ | |
| 858 switch (length) { | |
| 859 case 0: break; | |
| 860 case 1: case -1: | |
| 861 printf("\tmovb %d(%s),%s\n",offset, | |
| 862 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 863 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 864 register_name(to,0)); | |
| 865 break; | |
| 866 case 2: case -2: | |
| 867 printf("\tmovw %d(%s),%s\n",offset, | |
| 868 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 869 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 870 register_name(to,0)); | |
| 871 break; | |
| 872 case 4: case -4: | |
| 873 printf("\tmovl %d(%s),%s\n",offset, | |
| 874 register_name(from,0), register_name(dreg,0)); | |
| 875 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 876 register_name(to,0)); | |
| 877 break; | |
| 878 default: | |
| 879 if (-MAX_COPY_LEN<length && length <0) { | |
| 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 } else if (length <=MAX_COPY_LEN) { | |
| 888 for(;length>=4;length-=4,offset+=4) | |
| 889 emit_copy(from,to,4,offset,0,det); | |
| 890 for(;length>=2;length-=2,offset+=2) | |
| 891 emit_copy(from,to,2,offset,0,det); | |
| 892 if(length>0) | |
| 893 emit_copy(from,to,length,offset,0,det); | |
| 894 break; | |
| 895 } | |
| 896 if (det) { | |
| 897 /* | |
| 898 call bcopy | |
| 899 g_expr(list3(FUNCTION,,); | |
| 900 break; | |
| 901 */ | |
| 902 } | |
| 903 use_register(from,REG_ESI,1); | |
| 904 use_register(to, REG_EDI,1); | |
| 905 use_register(dreg,REG_ECX,0); | |
| 906 if (length<0) { | |
| 907 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 908 printf("\taddl $%d,%%esi\n",-length); | |
| 909 printf("\taddl $%d,%%edi\n",-length); | |
| 910 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 911 if(length%4) { | |
| 912 emit_copy(from,to,length,offset+length/4,0,det); | |
| 913 } | |
| 914 } else { | |
| 915 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 916 fix = (length/4)*4; | |
| 917 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 918 if(length%4) { | |
| 919 emit_copy(from,to,length,offset+length/4,0,det); | |
| 920 } | |
| 921 } | |
| 922 } | |
| 923 if (value) { | |
| 924 /* creg must point top of the destination data */ | |
| 925 /* this code is necessary for the value of assignment or function call */ | |
| 926 /* otherwise we don't need this */ | |
| 927 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 928 if(creg!=to) { | |
| 929 if (to==dreg) | |
| 930 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 931 else { | |
| 932 free_register(creg); creg=to; | |
| 933 } | |
| 934 } | |
| 935 } | |
| 936 regv[from]=regv[to]=regv[dreg]=0; | |
| 937 regv[creg]=1; | |
| 938 } | |
| 939 | |
| 940 int | |
| 941 struct_push(int e4,int t) | |
| 942 { | |
| 81 | 943 int length,xreg,save,lreg,count; |
| 61 | 944 g_expr(e4); |
| 945 length=size(t); | |
| 946 if(length%size_of_int) { | |
| 947 length += size_of_int - (length%size_of_int); | |
| 948 } | |
| 81 | 949 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 950 if (length==0) return count; | |
| 951 else { | |
| 952 printf("\tpushl %d(%s)\n", | |
| 953 length-size_of_int,register_name(creg,0)); | |
| 954 } | |
| 61 | 955 } |
| 956 printf("\tsubl $%d,%%esp\n",length); | |
| 957 if (register_full()) { | |
| 958 save = 1; | |
| 959 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 960 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 961 xreg = lreg; regv[xreg]=0; | |
| 962 } else { | |
| 963 save=0; | |
| 964 xreg = get_register(); | |
| 965 } | |
| 966 if (save) | |
| 967 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 968 else | |
| 969 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 970 regv[xreg]=1; | |
| 971 /* downward direction copy */ | |
| 972 emit_copy(creg,xreg,length,0,0,1); | |
| 973 /* we have value in creg, it may be changed */ | |
| 974 if (save) { | |
| 975 if(creg==xreg) { | |
| 976 creg = get_register(); /* creg is freed in emit_copy */ | |
| 977 } | |
| 978 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 979 regv[xreg]=1; | |
| 980 } else | |
| 981 free_register(xreg); | |
| 982 return length/size_of_int; | |
| 983 } | |
| 984 | |
| 94 | 985 int |
| 61 | 986 function(int e1) |
| 987 { | |
| 127 | 988 int e2,e3,e4,nargs,t,ret_type; |
| 989 NMTBL *n=0; | |
| 61 | 990 int save,saved; |
|
136
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991 ret_type = cadr(cadddr(e1)); |
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992 if (ret_type==CHAR) ret_type=INT; |
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changeset
|
993 |
| 94 | 994 #ifdef SAVE_STACKS |
| 995 code_save_stacks(); | |
| 996 #endif | |
| 137 | 997 if (free_register_count(0)<1) { |
| 61 | 998 for(save = 0;save==dreg||save==creg;save++); |
| 999 printf("\tpushl %s\n",register_name(save,0)); | |
| 1000 saved = 1; | |
| 1001 } else { | |
| 1002 save = get_register(); | |
| 1003 saved = 0; | |
| 1004 } | |
| 1005 regv[save]=0; | |
| 1006 e2 = cadr(e1); | |
| 1007 nargs = 0; | |
| 1008 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 1009 t=caddr(e3); | |
| 127 | 1010 e4 = car(e3); |
| 61 | 1011 if(scalar(t)) { |
| 1012 g_expr(e4); | |
| 1013 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1014 } else if (t==DOUBLE) { |
| 1015 g_expr(e4); | |
| 1016 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1017 nargs += size_of_double/size_of_int; |
| 83 | 1018 fregv[freg]=0; |
| 82 | 1019 continue; |
| 1020 } else if (t==FLOAT) { | |
| 1021 g_expr(e4); | |
| 1022 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1023 nargs += size_of_float/size_of_int; |
| 83 | 1024 fregv[freg]=0; |
| 82 | 1025 continue; |
| 61 | 1026 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1027 nargs += struct_push(e4,t); | |
| 1028 continue; | |
| 1029 } else { | |
| 1030 error(TYERR); | |
| 1031 } | |
| 1032 ++nargs; | |
| 1033 } | |
| 1034 if (car(e2) == FNAME) { | |
| 1035 n=(NMTBL *)cadr(e2); | |
| 78 | 1036 regv[creg]=0; |
| 1037 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1038 } else { |
| 1039 g_expr(e2); | |
| 78 | 1040 regv[creg]=1; |
| 1041 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1042 } |
| 1043 | |
| 1044 /* we don't have to save creg nor dreg */ | |
| 1045 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1046 regv[dreg]= regv[save]= 0; |
| 61 | 1047 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1048 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1049 regs[creg]=1; regs[dreg]=1; | |
| 1050 | |
| 1051 if (car(e2) == FNAME) { | |
| 1052 printf("\tcall\t%s\n",n->nm); | |
| 1053 } else { | |
| 1054 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1055 } | |
| 1056 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1057 if (saved) { | |
| 1058 printf("\tpopl %s\n",register_name(save,0)); | |
| 1059 } else { | |
| 1060 free_register(save); | |
| 1061 } | |
| 1062 regv[save]=0; | |
| 105 | 1063 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1064 fregv[freg]=1; regv[creg]=0; |
| 105 | 1065 } else if (ret_type==VOID) { |
| 94 | 1066 fregv[freg]=0; regv[creg]=0; |
| 1067 } else { | |
| 1068 fregv[freg]=0; regv[creg]=1; | |
| 1069 } | |
| 105 | 1070 return ret_type; |
| 61 | 1071 } |
| 1072 | |
| 1073 void | |
| 1074 code_frame_pointer(int e3) { | |
| 1075 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1076 } | |
| 1077 | |
| 1078 | |
| 1079 void | |
| 62 | 1080 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1081 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1082 } | |
| 1083 | |
| 1084 | |
| 1085 void | |
| 1086 code_jmp(char *s) { | |
| 1087 printf("\tjmp %s\n",s); | |
| 1088 } | |
| 1089 | |
| 1090 | |
| 1091 void | |
| 1092 code_indirect_jmp(int e2) { | |
| 1093 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1094 } | |
| 1095 | |
| 94 | 1096 int |
| 61 | 1097 rindirect(int e1) /* *(p +5 ) */ |
| 1098 { | |
| 1099 char *op; | |
| 94 | 1100 int e2,e3,byte,t; |
| 61 | 1101 e3 = cadr(e2 = cadr(e1)); |
| 1102 g_expr(e2); | |
| 82 | 1103 switch (car(e1)) { |
| 1104 case FRINDIRECT: case DRINDIRECT: | |
| 163 | 1105 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); |
| 1106 t=DOUBLE; | |
| 1107 return t; | |
| 1108 break; | |
| 1109 case CRINDIRECT: | |
| 1110 byte = 1; op="movsbl";t=CHAR; | |
| 166 | 1111 break; |
| 163 | 1112 case CURINDIRECT: |
| 166 | 1113 byte = 1; op="movzbl";t=UCHAR; |
| 1114 break; | |
| 165 | 1115 case SRINDIRECT: |
| 1116 byte = 1; op="movswl";t=SHORT; | |
| 166 | 1117 break; |
| 165 | 1118 case SURINDIRECT: |
| 166 | 1119 byte = 1; op="movzwl";t=USHORT; |
| 1120 break; | |
| 163 | 1121 case RINDIRECT: default: |
| 1122 byte = 0; op="movl";t=INT; | |
| 1123 } | |
| 61 | 1124 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1125 return t; |
| 61 | 1126 } |
| 1127 | |
| 1128 char * | |
| 1129 move(int byte) | |
| 1130 { | |
| 165 | 1131 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1132 } |
| 1133 | |
| 1134 void | |
| 103 | 1135 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1136 if (byte) use_data_reg(creg,1); |
| 109 | 1137 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1138 } |
| 1139 | |
| 1140 void | |
| 103 | 1141 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1142 if (byte) use_data_reg(creg,1); |
| 119 | 1143 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1144 } |
| 1145 | |
| 1146 void | |
| 111 | 1147 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1148 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1149 } | |
| 1150 | |
| 1151 void | |
| 118 | 1152 code_assign(int e2,int byte,int creg) { |
| 95 | 1153 if (byte) use_data_reg(creg,1); |
| 61 | 1154 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1155 regv[creg]=1; |
| 61 | 1156 } |
| 1157 | |
| 1158 void | |
| 1159 code_register_assop(int e2,int op,int byte) { | |
| 1160 int reg; | |
| 1161 int xreg = creg; | |
| 1162 creg = reg = e2; | |
| 1163 tosop(op,xreg); | |
| 1164 creg = xreg; | |
| 1165 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1166 regs[creg]=regv[creg]=1; |
| 61 | 1167 } |
| 1168 | |
| 1169 | |
| 1170 void | |
| 163 | 1171 code_assop(int op,int byte,int sign) { |
| 61 | 1172 char *xrn; |
| 1173 int xreg; | |
| 1174 int edx = edx_setup(); | |
| 1175 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1176 regv[xreg]=regs[xreg]=1; | |
| 1177 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1178 regv[edx]=1; | |
| 163 | 1179 ld_indexx(byte,0,edx,sign); |
| 61 | 1180 tosop(op,xreg); |
| 165 | 1181 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1182 edx_cleanup(); |
| 1183 emit_pop_free(xreg); | |
| 144 | 1184 regv[creg]=1; |
| 61 | 1185 } |
| 1186 | |
| 1187 | |
| 1188 void | |
| 1189 tosop(int op,int oreg) | |
| 1190 { | |
| 1191 int dx; | |
| 1192 char *orn,*crn; | |
| 1193 | |
| 1194 switch(op) { | |
| 1195 case LSHIFT: | |
| 1196 case ULSHIFT: | |
| 1197 shift("sall",oreg); | |
| 144 | 1198 regv[creg]=1; |
| 61 | 1199 return; |
| 1200 case RSHIFT: | |
| 1201 shift("sarl",oreg); | |
| 144 | 1202 regv[creg]=1; |
| 61 | 1203 return; |
| 1204 case URSHIFT: | |
| 1205 shift("shrl",oreg); | |
| 144 | 1206 regv[creg]=1; |
| 61 | 1207 return; |
| 1208 } | |
| 1209 if(oreg==-1) { | |
| 1210 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1211 oreg = dreg; | |
| 1212 regv[dreg]=1; | |
| 94 | 1213 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1214 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1215 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1216 oreg = dreg; |
| 1217 regv[dreg]=1; | |
| 61 | 1218 } |
| 1219 regv[oreg]=1; regs[oreg]=1; | |
| 1220 orn = register_name(oreg,0); | |
| 1221 crn = register_name(creg,0); | |
| 1222 switch(op) { | |
| 1223 case ADD: | |
| 1224 printf("\taddl %s,%s\n",orn,crn); | |
| 1225 break; | |
| 89 | 1226 case SUB: case CMP: |
| 61 | 1227 printf("\tsubl %s,%s\n",orn,crn); |
| 1228 break; | |
| 1229 case BAND: | |
| 1230 printf("\tandl %s,%s\n",orn,crn); | |
| 1231 break; | |
| 1232 case EOR: | |
| 1233 printf("\txorl %s,%s\n",orn,crn); | |
| 1234 break; | |
| 1235 case BOR: | |
| 1236 printf("\torl %s,%s\n",orn,crn); | |
| 1237 break; | |
| 1238 case MUL: | |
| 1239 case UMUL: | |
| 1240 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1241 break; | |
| 1242 case DIV: | |
| 1243 case UDIV: | |
| 1244 use_register(creg,REG_EAX,1); | |
| 1245 edx_setup(); | |
| 1246 orn = register_name(oreg,0); | |
| 1247 if (op==DIV) | |
| 127 | 1248 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1249 else |
| 127 | 1250 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1251 edx_cleanup(); |
| 1252 break; | |
| 1253 case MOD: | |
| 1254 case UMOD: | |
| 1255 use_register(creg,REG_EAX,1); | |
| 1256 edx_setup(); | |
| 1257 orn = register_name(oreg,0); | |
| 1258 if (op==DIV) | |
| 127 | 1259 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1260 else |
| 127 | 1261 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1262 dx = virtual(REG_EDX); |
| 1263 if (dx!=creg) { | |
| 1264 rname[dx]=rname[creg]; | |
| 1265 rname[creg]=REG_EDX; | |
| 1266 } | |
| 1267 edx_cleanup(); | |
| 1268 break; | |
| 1269 } | |
| 159 | 1270 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1271 free_register(oreg); |
| 94 | 1272 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1273 regv[creg]=1; |
| 61 | 1274 } |
| 1275 | |
| 1276 static int edx_stack=0; | |
| 1277 | |
| 1278 int | |
| 1279 edx_setup() | |
| 1280 { | |
| 1281 int edx_save; | |
| 1282 /* make real EDX register empty */ | |
| 137 | 1283 if (free_register_count(0)<1) { |
| 61 | 1284 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1285 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1286 edx_stack = list3(edx_save,edx_stack,0); | |
| 1287 } else { | |
| 1288 edx_save = get_register(); | |
| 1289 edx_stack = list3(edx_save,edx_stack,1); | |
| 1290 } | |
| 1291 regv[edx_save]=0; | |
| 1292 use_register(edx_save,REG_EDX,0); | |
| 1293 return edx_save; | |
| 1294 } | |
| 1295 | |
| 1296 | |
| 1297 void | |
| 1298 edx_cleanup() | |
| 1299 { | |
| 1300 if (caddr(edx_stack)==0) { | |
| 1301 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1302 } else | |
| 1303 free_register(car(edx_stack)); | |
| 1304 edx_stack = cadr(edx_stack); | |
| 1305 } | |
| 1306 | |
| 1307 void | |
| 1308 shift(char *op, int reg) | |
| 1309 { | |
| 1310 if (reg>=0) { | |
| 1311 use_register(reg,REG_ECX,1); | |
| 103 | 1312 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1313 use_register(dreg,REG_ECX,0); | |
| 119 | 1314 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1315 reg = dreg; |
| 1316 regv[dreg]=0; | |
| 61 | 1317 } else { |
| 1318 use_register(dreg,REG_ECX,0); | |
| 1319 printf("\tpopl %%ecx\n"); | |
| 103 | 1320 regv[dreg]=0; |
| 61 | 1321 } |
| 1322 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1323 } | |
| 1324 | |
| 1325 void | |
| 163 | 1326 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1327 { |
| 1328 char *op; | |
| 1329 | |
| 166 | 1330 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1331 if (n) |
| 95 | 1332 printf("\t%s %d(%s),%s\n",op,n, |
| 1333 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1334 else |
| 95 | 1335 printf("\t%s (%s),%s\n",op, |
| 1336 register_name(xreg,0),register_name(creg,byte)); | |
| 1337 } | |
| 1338 | |
| 1339 int | |
| 1340 code_csvalue() | |
| 1341 { | |
| 123 | 1342 return rname[creg]; /* for switch value */ |
| 61 | 1343 } |
| 1344 | |
| 1345 void | |
| 95 | 1346 code_cmpdimm(int e, int csreg) |
| 61 | 1347 { |
| 1348 /* used in dosiwtch() */ | |
| 66 | 1349 if(chk) return; |
| 123 | 1350 use_register(creg,csreg,0); |
| 61 | 1351 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1352 } | |
| 1353 | |
| 1354 void | |
| 66 | 1355 code_opening(char *filename) |
| 61 | 1356 { |
| 1357 printf("\t.file \"%s\"\n",filename); | |
| 1358 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1359 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1360 printf(".text\n"); |
| 1361 } | |
| 1362 | |
| 1363 void | |
| 66 | 1364 code_closing() |
| 61 | 1365 { |
| 78 | 1366 global_table(); |
| 61 | 1367 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1368 } | |
| 1369 | |
| 1370 void | |
| 89 | 1371 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1372 { |
| 89 | 1373 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1374 printf("\tj%s\t_%d\n",s,l1); |
| 1375 } | |
| 1376 | |
| 82 | 1377 |
| 1378 void | |
| 61 | 1379 jcond(int l, char cond) |
| 1380 { | |
| 66 | 1381 if (chk) return; |
| 61 | 1382 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1383 } | |
| 1384 | |
| 1385 void | |
| 1386 jmp(int l) | |
| 1387 { | |
| 1388 control=0; | |
| 66 | 1389 if (chk) return; |
| 61 | 1390 printf("\tjmp\t_%d\n",l); |
| 1391 /* align? */ | |
| 1392 /* | |
| 1393 this is not allowed because of ? operator | |
| 1394 regv[creg]=regv[dreg]=0; | |
| 1395 use_register(creg,REG_EAX,0); | |
| 1396 use_register(dreg,REG_EBX,0); | |
| 1397 */ | |
| 1398 } | |
| 1399 | |
| 1400 void | |
| 1401 gen_comment(char *s) | |
| 1402 { | |
| 66 | 1403 if (chk) return; |
| 1404 printf("## %s",s); | |
| 61 | 1405 } |
| 1406 | |
| 1407 | |
| 1408 void | |
| 1409 code_enter(char *name) | |
| 1410 { | |
| 1411 printf("\t.align 4\n"); | |
| 1412 if (stmode!=STATIC) | |
| 1413 printf(".globl %s\n",name); | |
| 1414 printf("\t.type\t%s,@function\n",name); | |
| 1415 printf("%s:\n",name); | |
| 1416 } | |
| 1417 | |
| 77 | 1418 |
| 61 | 1419 void |
| 1420 code_enter1(int args) | |
| 1421 { | |
| 1422 code_disp_label=fwdlabel(); | |
| 1423 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1424 | |
| 1425 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1426 } | |
| 1427 | |
| 1428 void | |
| 1429 code_leave(char *name) | |
| 1430 { | |
| 63 | 1431 disp&= -size_of_int; |
| 61 | 1432 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1433 printf("_%d:\n",labelno); | |
| 1434 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1435 local_table(); | |
| 1436 labelno++; | |
| 1437 free_all_register(); | |
| 1438 } | |
| 1439 | |
| 1440 void | |
| 1441 enter(char *name) | |
| 1442 { | |
| 1443 printf("\t.align 2\n"); | |
| 1444 if (stmode!=STATIC) | |
| 1445 printf(".globl %s\n",name); | |
| 1446 printf("%s:\n",name); | |
| 1447 printf("\t.type\t%s,@function\n",name); | |
| 1448 printf("\tpushl %%ebp\n"); | |
| 1449 printf("\tmovl %%esp,%%ebp\n"); | |
| 1450 printf("\tpushl %%ebx\n"); | |
| 1451 printf("\tpushl %%esi\n"); | |
| 1452 printf("\tpushl %%edi\n"); | |
| 1453 } | |
| 1454 | |
| 1455 void | |
| 1456 enter1() | |
| 1457 { | |
| 1458 func_disp_label=fwdlabel(); | |
| 1459 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1460 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1461 } | |
| 1462 | |
| 1463 void | |
| 1464 leave(int control, char *name) | |
| 1465 { | |
| 128 | 1466 int sz; |
| 1467 | |
| 1468 disp &= -size_of_int; | |
| 61 | 1469 if (control) |
| 108 | 1470 code_set_return_register(1); |
| 61 | 1471 if (retcont) { |
| 1472 if (control) | |
| 1473 jmp(retlabel); | |
| 1474 fwddef(retcont); | |
| 128 | 1475 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1476 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1477 } else if (cadr(fnptr->ty)>0&&( | |
| 1478 car(cadr(fnptr->ty))==STRUCT || | |
| 1479 car(cadr(fnptr->ty))==UNION)) { | |
| 1480 sz = size(cadr(fnptr->ty)); | |
| 1481 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1482 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1483 register_name(creg,0)); | |
| 1484 emit_copy(dreg,creg,sz,0,1,1); | |
| 1485 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1486 use_register(creg,REG_EAX,0); | |
| 1487 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1488 } | |
| 61 | 1489 } |
| 1490 fwddef(retlabel); | |
| 63 | 1491 |
| 61 | 1492 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1493 printf("\tpopl %%edi\n"); | |
| 1494 printf("\tpopl %%esi\n"); | |
| 1495 printf("\tpopl %%ebx\n"); | |
| 1496 printf("\tleave\n"); | |
| 1497 printf("\tret\n"); | |
| 1498 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1499 printf("_%d:\n",labelno); | |
| 1500 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1501 local_table(); | |
| 1502 labelno++; | |
| 1503 free_all_register(); | |
| 1504 } | |
| 1505 | |
| 1506 | |
| 1507 void | |
| 108 | 1508 code_set_fixed_creg(int mode,int type) { |
| 1509 if (type==FLOAT||type==DOUBLE) { | |
| 1510 } else | |
| 1511 use_register(creg,REG_EAX,mode); | |
| 61 | 1512 } |
| 1513 | |
| 1514 void | |
| 107 | 1515 code_set_return_register(int mode) { |
| 1516 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1517 } else { | |
| 1518 use_register(creg,REG_EAX,mode); | |
| 1519 } | |
| 1520 } | |
| 1521 | |
| 1522 void | |
| 61 | 1523 gen_gdecl(char *n, int gpc) |
| 1524 { | |
| 1525 /* | |
| 1526 if (stmode!=STATIC) | |
| 1527 printf(".globl %s\n",n); | |
| 1528 */ | |
| 1529 } | |
| 1530 | |
| 1531 void | |
| 1532 align(int t) | |
| 1533 { | |
| 1534 if (t!=CHAR) { | |
| 1535 if (data_alignment & 1) | |
| 1536 printf("\t.align 2\n"); | |
| 1537 data_alignment = 0; | |
| 1538 } | |
| 1539 } | |
| 1540 | |
| 1541 void | |
| 1542 emit_data(int e, int t, NMTBL *n) | |
| 1543 { | |
| 1544 int l; | |
| 82 | 1545 double d; |
| 1546 float f; | |
| 61 | 1547 char *name; |
| 1548 name = n->nm; | |
| 156 | 1549 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1550 error(-1); return; |
| 1551 } | |
| 66 | 1552 if (chk) return; |
| 61 | 1553 if (n->dsp != -1) { |
| 1554 n->dsp = -1; /* initiallized flag */ | |
| 1555 printf(".globl\t%s\n",name); | |
| 1556 data_mode(name); | |
| 1557 align(t); | |
| 1558 printf("%s:\n",name); | |
| 1559 } else { | |
| 1560 data_mode(0); | |
| 1561 } | |
| 1562 if(car(e)==CONST) { | |
| 1563 if (t==CHAR) { | |
| 1564 printf("\t.byte %d\n",cadr(e)); | |
| 1565 if (data_alignment>0) | |
| 1566 data_alignment++; | |
| 1567 gpc += 1; | |
| 82 | 1568 } else if (t==SHORT) { |
| 1569 printf("\t.word %d\n",cadr(e)); | |
| 1570 if (data_alignment>0) data_alignment++; | |
| 1571 gpc += 2; | |
| 61 | 1572 } else { |
| 1573 printf("\t.long %d\n",cadr(e)); | |
| 1574 gpc += size_of_int; | |
| 1575 } | |
| 82 | 1576 } else if(t==DOUBLE) { |
| 1577 d = dcadr(e); | |
| 1578 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1579 } else if(t==FLOAT) { | |
| 1580 f = dcadr(e); | |
| 1581 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1582 } else if(t!=CHAR) { |
| 1583 gpc += size_of_int; | |
| 1584 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1585 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1586 } else if(car(e)==GVAR) { | |
| 1587 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1588 } else if(car(e)==FNAME) { |
| 1589 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1590 } else if(car(e)==STRING) { | |
| 1591 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1592 l = fwdlabel(); | |
| 1593 printf("\t.long _%d\n",l); | |
| 1594 printf(".section\t.rodata\n"); | |
| 1595 printf("_%d:\n",l); | |
| 1596 output_mode = RODATA_EMIT_MODE; | |
| 1597 } | |
| 1598 ascii((char *)cadr(e)); | |
| 1599 } else error(TYERR); | |
| 1600 } | |
| 1601 } | |
| 1602 | |
| 1603 void | |
| 1604 emit_data_closing(NMTBL *n) | |
| 1605 { | |
| 1606 int lb; | |
| 66 | 1607 if (chk) return; |
| 61 | 1608 if (mode==GDECL) { |
| 1609 data_mode(0); | |
| 1610 lb=fwdlabel(); | |
| 1611 printf("_%d:\n",lb); | |
| 1612 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1613 } | |
| 1614 } | |
| 1615 | |
| 1616 void | |
| 1617 global_table(void) | |
| 1618 { | |
| 1619 NMTBL *n; | |
| 1620 int init; | |
| 1621 init=0; | |
| 1622 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1623 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1624 /* n->dsp = -1 means initialized global */ |
| 1625 if (init==0) { | |
| 1626 data_mode(0); | |
| 1627 init=1; | |
| 1628 } | |
| 1629 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1630 } | |
| 1631 } | |
| 1632 } | |
| 1633 | |
| 1634 void | |
| 1635 local_table(void) | |
| 1636 { | |
| 1637 NMTBL *n; | |
| 1638 int init; | |
| 1639 init=0; | |
| 1640 /* static local variables */ | |
| 1641 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1642 if (n->sc == GVAR) { | |
| 1643 if (init==0) { | |
| 1644 data_mode(0); | |
| 1645 init=1; | |
| 1646 } | |
| 156 | 1647 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1648 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1649 } |
| 1650 } | |
| 1651 } | |
| 1652 | |
| 1653 void | |
| 1654 text_mode(void) | |
| 1655 { | |
| 1656 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1657 printf(".text\n"); | |
| 1658 printf("\t.align 2\n"); | |
| 1659 output_mode = TEXT_EMIT_MODE; | |
| 1660 } | |
| 1661 } | |
| 1662 | |
| 1663 void | |
| 1664 data_mode(char *name) | |
| 1665 { | |
| 1666 if (output_mode!=DATA_EMIT_MODE) { | |
| 1667 printf(".data\n"); | |
| 1668 output_mode = DATA_EMIT_MODE; | |
| 1669 } | |
| 1670 if (name) | |
| 1671 printf("\t.type\t%s,@object\n",name); | |
| 1672 } | |
| 1673 | |
| 81 | 1674 /* floating point */ |
| 1675 | |
| 1676 | |
| 82 | 1677 char * |
| 1678 fstore(int d) | |
| 1679 { | |
| 83 | 1680 return use? |
| 1681 (d?"fstl":"fsts"): | |
| 1682 (d?"fstpl":"fstps") | |
| 1683 ; | |
| 1684 } | |
| 1685 | |
| 1686 char * | |
| 1687 fstore_u(int d) | |
| 1688 { | |
| 82 | 1689 return d?"fstpl":"fstps"; |
| 1690 } | |
| 81 | 1691 |
| 82 | 1692 char * |
| 1693 fload(int d) | |
| 1694 { | |
| 1695 return d?"fldl":"flds"; | |
| 1696 } | |
| 81 | 1697 |
| 1698 | |
| 103 | 1699 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1700 { |
| 109 | 1701 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1702 } |
| 1703 | |
| 103 | 1704 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1705 { |
| 119 | 1706 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1707 } |
| 1708 | |
| 138 | 1709 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1710 { |
| 1711 error(-1); | |
| 1712 } | |
| 1713 | |
| 103 | 1714 void code_dassign(int e2,int freg,int d) |
| 82 | 1715 { |
| 1716 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1717 } | |
| 1718 | |
| 1719 static double d0 = 1.0; | |
| 81 | 1720 |
| 82 | 1721 int |
| 1722 code_d1(double d) | |
| 1723 { | |
| 1724 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1725 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1726 } | |
| 1727 | |
| 1728 int | |
| 1729 code_d2(double d) | |
| 1730 { | |
| 1731 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1732 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1733 } | |
| 1734 | |
| 138 | 1735 void code_dconst(int e2,int freg,int d) |
| 82 | 1736 { |
| 1737 int lb; | |
| 138 | 1738 double value = dcadr(e2); |
| 81 | 1739 |
| 138 | 1740 if (value==0.0) { |
| 82 | 1741 printf("\tfldz\n"); return; |
| 1742 } | |
| 138 | 1743 if (value==1.0) { |
| 82 | 1744 printf("\tfld1\n"); return; |
| 1745 } | |
| 1746 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1747 lb=fwdlabel(); | |
| 1748 printf("_%d:\n",lb); | |
| 138 | 1749 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1750 if (output_mode==TEXT_EMIT_MODE) { |
| 1751 printf(".text\n"); | |
| 1752 } else { | |
| 1753 text_mode(); | |
| 1754 } | |
| 1755 printf("\tfldl _%d\n",lb); | |
| 1756 } | |
| 1757 | |
| 138 | 1758 void code_dneg(int freg,int d) |
| 82 | 1759 { |
| 1760 printf("\tfchs\n"); | |
| 1761 } | |
| 81 | 1762 |
| 147 | 1763 void code_d2i(int freg) |
| 82 | 1764 { |
| 1765 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 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"); | |
| 85 | 1770 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1771 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1772 printf("\tfldcw (%%esp)\n"); |
| 82 | 1773 printf("\tpopl %s\n",register_name(creg,0)); |
| 1774 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1775 } | |
| 81 | 1776 |
| 147 | 1777 void code_i2d(int creg) |
| 82 | 1778 { |
| 1779 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1780 printf("\tfildl (%%esp)\n"); | |
| 1781 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1782 } | |
| 1783 | |
| 147 | 1784 void code_d2u(int freg) |
| 85 | 1785 { |
| 86 | 1786 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1787 printf("\tfnstcw (%%esp)\n"); |
| 1788 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1789 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1790 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1791 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1792 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1793 printf("\tfldcw (%%esp)\n"); |
| 86 | 1794 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1795 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1796 } |
| 1797 | |
| 147 | 1798 void code_u2d(int creg) |
| 85 | 1799 { |
| 86 | 1800 printf("\tpushl %s\n",register_name(creg,0)); |
| 1801 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1802 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1803 printf("\tfildll (%%esp)\n"); | |
| 1804 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1805 } |
| 1806 | |
| 133 | 1807 void code_d2f(int freg) { } |
| 1808 void code_f2d(int freg) { } | |
| 147 | 1809 void code_f2i(int freg) { code_d2i(freg); } |
| 1810 void code_f2u(int freg) { code_d2u(freg); } | |
| 1811 void code_i2f(int creg) { code_i2d(creg); } | |
| 1812 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1813 |
| 107 | 1814 void code_drgvar(int e2,int d,int freg) |
| 82 | 1815 { |
| 109 | 1816 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1817 } |
| 81 | 1818 |
| 1819 | |
| 107 | 1820 void code_drlvar(int e2,int d,int freg) |
| 82 | 1821 { |
| 119 | 1822 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1823 } |
| 1824 | |
| 138 | 1825 void code_cmp_drgvar(int e2,int d) |
| 82 | 1826 { |
| 109 | 1827 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1828 } |
| 1829 | |
| 138 | 1830 void code_cmp_drlvar(int e2,int d) |
| 82 | 1831 { |
| 119 | 1832 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1833 } |
| 1834 | |
| 1835 void dtosop(int op,int e1) | |
| 94 | 1836 { |
| 82 | 1837 switch(op) { |
| 133 | 1838 case FADD: |
| 82 | 1839 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1840 case FSUB: |
| 85 | 1841 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1842 case FDIV: |
| 85 | 1843 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1844 case FMUL: |
| 82 | 1845 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1846 case FCMP: |
| 89 | 1847 case DCMP: |
| 82 | 1848 printf("\tfucompp\n"); |
| 1849 printf("\tfnstsw\t%%ax\n"); | |
| 1850 break; | |
| 1851 } | |
| 1852 } | |
| 81 | 1853 |
| 83 | 1854 void |
| 1855 code_dassop(int op,int d) { | |
| 1856 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1857 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1858 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1859 dtosop(op,0); | |
| 1860 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1861 } | |
| 1862 | |
| 1863 void | |
| 107 | 1864 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1865 g_expr(e2); |
| 1866 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1867 printf("\tfld1\n"); | |
| 87 | 1868 if (caddr(e1)>0) |
| 83 | 1869 printf("\tfaddp %%st,%%st(1)\n"); |
| 1870 else | |
| 1871 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1872 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1873 } | |
| 1874 | |
| 1875 void | |
| 107 | 1876 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1877 g_expr(e2); |
| 1878 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1879 if (use) | |
| 86 | 1880 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1881 printf("\tfld1\n"); |
| 87 | 1882 if (caddr(e1)>0) |
| 83 | 1883 printf("\tfaddp %%st,%%st(1)\n"); |
| 1884 else | |
| 1885 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1886 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1887 } |
| 1888 | |
| 84 | 1889 void |
| 1890 drexpr(int e1, int e2,int l1, int op) | |
| 1891 { | |
| 89 | 1892 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1893 switch(op) { |
| 1894 case DOP+GE: | |
| 133 | 1895 case FOP+GE: |
| 84 | 1896 printf("\ttestb\t$5,%%ah\n"); |
| 1897 printf("\tjne\t_%d\n",l1); | |
| 1898 break; | |
| 1899 case DOP+GT: | |
| 133 | 1900 case FOP+GT: |
| 84 | 1901 printf("\ttestb\t$69,%%ah\n"); |
| 1902 printf("\tjne\t_%d\n",l1); | |
| 1903 break; | |
| 1904 case DOP+EQ: | |
| 133 | 1905 case FOP+EQ: |
| 84 | 1906 printf("\tandb\t$69,%%ah\n"); |
| 1907 printf("\txorb\t$64,%%ah\n"); | |
| 1908 printf("\tjne\t_%d\n",l1); | |
| 1909 break; | |
| 1910 case DOP+NEQ: | |
| 133 | 1911 case FOP+NEQ: |
| 84 | 1912 printf("\tandb\t$69,%%ah\n"); |
| 1913 printf("\txorb\t$64,%%ah\n"); | |
| 1914 printf("\tje\t_%d\n",l1); | |
| 1915 break; | |
| 1916 } | |
| 1917 } | |
| 1918 | |
| 94 | 1919 void |
| 138 | 1920 code_dregister(int e2,int freg,int d) |
| 94 | 1921 { |
| 1922 error(-1); | |
| 1923 } | |
| 1924 | |
| 138 | 1925 void |
| 1926 code_cmp_dregister(int e2,int d) | |
| 94 | 1927 { |
| 1928 error(-1); | |
| 82 | 1929 } |
| 81 | 1930 |
| 97 | 1931 int pop_fregister() |
| 82 | 1932 { |
| 94 | 1933 if (freg_sp<0) { error(-1); return -1;} |
| 1934 printf("# fpop: %d\n",freg_sp-1); | |
| 1935 return freg_stack[--freg_sp]; | |
| 82 | 1936 } |
| 81 | 1937 |
| 94 | 1938 int |
| 138 | 1939 emit_dpop(int d) |
| 94 | 1940 { |
| 1941 int xreg; | |
| 97 | 1942 if ((xreg=pop_fregister())==-1) { |
| 94 | 1943 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1944 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1945 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1946 /* pushed order is reversed. We don't need this for comutable |
| 1947 operator, but it is ok to do this. */ | |
| 1948 printf("\tfxch\t%%st(1)\n"); | |
| 1949 } | |
| 1950 return xreg; | |
| 1951 } | |
| 1952 | |
| 1953 | |
| 138 | 1954 void emit_dpop_free(int e1,int d) |
| 82 | 1955 { |
| 1956 } | |
| 81 | 1957 |
| 133 | 1958 void emit_dpush(int type) |
| 82 | 1959 { |
| 119 | 1960 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1961 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1962 freg_stack[freg_sp++]=-1; |
| 94 | 1963 printf("# fpush:%d\n",freg_sp); |
| 1964 } | |
| 1965 | |
| 1966 void | |
| 1967 code_save_stacks() | |
| 1968 { | |
| 1969 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1970 int xreg,sp,screg; | |
| 1971 sp=reg_sp; | |
| 1972 while(sp-->0) { | |
| 1973 if ((xreg=reg_stack[sp])>=0) { | |
| 1974 screg=creg; | |
| 1975 if(creg!=xreg) { | |
| 1976 if (xreg!=dreg) free_register(xreg); | |
| 1977 creg = xreg; | |
| 1978 } | |
| 1979 code_assign_lvar( | |
| 119 | 1980 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1981 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1982 regv[xreg]=0; | |
| 1983 creg=screg; | |
| 1984 } | |
| 1985 } | |
| 107 | 1986 code_save_fstacks(); |
| 1987 } | |
| 1988 | |
| 1989 void | |
| 1990 code_save_fstacks() | |
| 1991 { | |
| 127 | 1992 int xreg,sp,uses; |
| 1993 uses = use; use = 0; | |
| 94 | 1994 sp=freg_sp; |
| 1995 while(sp-->0) { | |
| 1996 if ((xreg=freg_stack[sp])==-1) { | |
| 1997 code_dassign_lvar( | |
| 119 | 1998 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1999 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 2000 } | |
| 2001 } | |
| 127 | 2002 use = uses; |
| 82 | 2003 } |
| 81 | 2004 |
| 61 | 2005 /* end */ |