Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 159:b80e9737c3ce
regs[creg]==0 in ia32
| author | kono |
|---|---|
| date | Thu, 14 Aug 2003 02:40:39 +0900 |
| parents | da529eab5618 |
| children | fc8514c9d685 |
| 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 | |
| 147 | 195 int use_int(int i) { return i;} |
| 196 int use_float(int i) { return i;} | |
| 197 int use_double(int i) { return i;} | |
| 198 | |
| 61 | 199 void |
| 200 gexpr_code_init(void){ | |
| 201 use_register(creg,REG_EAX,0); | |
| 94 | 202 regv[creg]=0; |
| 61 | 203 regv[dreg]=0; |
| 204 } | |
| 205 | |
| 147 | 206 void |
| 207 code_gexpr(int e){ | |
| 208 } | |
| 209 | |
| 61 | 210 int |
| 211 register_var(int r) { | |
| 212 return virtual(r+REG_ESI); | |
| 213 } | |
| 214 | |
| 89 | 215 int |
| 216 get_register(void) | |
| 217 { /* 使われていないレジスタを調べる */ | |
| 218 int i; | |
| 219 for(i=0;i<MAX_REGISTER;i++) { | |
| 220 if (! regs[i]) { /* 使われていないなら */ | |
| 221 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 222 return i; /* その場所を表す番号を返す */ | |
| 223 } | |
| 224 } | |
| 225 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 226 } | |
| 227 | |
| 228 void | |
| 229 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 230 regv[i]=regs[i]=0; | |
| 231 } | |
| 232 | |
| 99 | 233 int |
| 126 | 234 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 235 { |
| 126 | 236 if (is_code) { |
| 237 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 238 i = virtual(i+REG_ESI); | |
| 239 regs[i]=regv[i]=1; | |
| 240 return list3(REGISTER,i,(int)nptr); | |
| 241 } else { | |
| 242 return 0; | |
| 243 } | |
| 99 | 244 } |
| 103 | 245 |
| 99 | 246 int |
| 138 | 247 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 248 { |
| 126 | 249 return 0; |
| 99 | 250 } |
| 251 | |
| 252 int | |
| 138 | 253 get_dregister(int d) |
| 99 | 254 { |
| 255 return -1; | |
| 256 } | |
| 257 | |
| 89 | 258 int |
| 259 register_full(void) | |
| 260 { | |
| 261 int i; | |
| 262 for(i=0;i<MAX_REGISTER;i++) { | |
| 263 if (! regs[i]) { | |
| 264 return 0; | |
| 265 } | |
| 266 } | |
| 267 return 1; | |
| 268 } | |
| 269 | |
| 270 int | |
| 137 | 271 free_register_count(int d) |
| 89 | 272 { |
| 273 int i,count; | |
| 274 count = 0; | |
| 275 for(i=0;i<MAX_REGISTER;i++) { | |
| 276 if (! regs[i] && ! regv[i]) count++; | |
| 277 } | |
| 137 | 278 return d?0:count; |
| 89 | 279 } |
| 280 | |
| 281 void | |
| 282 free_all_register(void) | |
| 283 { | |
| 284 int i; | |
| 285 for(i=0;i<MAX_REGISTER;i++) { | |
| 286 regs[i]=regv[i]=0; | |
| 287 } | |
| 288 creg = get_register(); | |
| 289 dreg = get_register(); | |
| 290 return; | |
| 291 } | |
| 292 | |
| 293 | |
| 294 void | |
| 295 register_usage(char *s) | |
| 296 { | |
| 297 int i; | |
| 298 if (chk) return; | |
| 299 printf("# %d: %s:",lineno,s); | |
| 300 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 301 for(i=0;i<MAX_REGISTER;i++) { | |
| 302 printf("%d",regs[i]); | |
| 303 } | |
| 304 printf(":"); | |
| 305 for(i=0;i<MAX_REGISTER;i++) { | |
| 306 printf("%d",regv[i]); | |
| 307 } | |
| 308 #if 0 | |
| 309 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 310 for(i=reg_sp;i>=0;i--) { | |
| 311 if(reg_stack[i]>=0) | |
| 312 printf(" %s",register_name(reg_stack[i],0)); | |
| 313 } | |
| 314 #endif | |
| 94 | 315 printf(" f:%d",freg_sp); |
| 89 | 316 printf("\n"); |
| 317 } | |
| 318 | |
| 109 | 319 void |
| 137 | 320 code_arg_register(NMTBL *fnptr) |
| 109 | 321 { |
| 137 | 322 int args = fnptr->dsp; |
| 323 NMTBL *n; | |
| 324 int reg_var = 0; | |
| 325 int freg_var = 0; | |
| 326 int type; | |
| 327 int reg; | |
| 328 int is_code0 = is_code(fnptr); | |
| 329 | |
| 330 while (args) { | |
| 331 /* process in reverse order */ | |
| 332 n = (NMTBL*)caddr(args); | |
| 333 type = n->ty; | |
| 334 if (scalar(type)) { | |
| 335 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 336 n->sc = REGISTER; | |
| 337 n->dsp = cadr(reg); | |
| 338 regv[n->dsp]= 1; | |
| 339 regs[n->dsp]= INPUT_REG; | |
| 340 reg_var++; | |
| 341 cadddr(args)=size_of_int; /* why we need this? */ | |
| 342 } | |
| 343 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 344 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 345 n->sc = DREGISTER; |
| 346 n->dsp = cadr(reg); | |
| 347 fregv[n->dsp]= 1; | |
| 348 fregs[n->dsp]= INPUT_REG; | |
| 349 freg_var++; | |
| 350 cadddr(args)=size(type); /* why we need this? */ | |
| 351 } | |
| 352 } | |
| 353 args = cadr(args); | |
| 354 } | |
| 109 | 355 } |
| 356 | |
| 89 | 357 void |
| 358 gexpr_init(void) | |
| 359 { | |
| 360 while(reg_sp > 0) { | |
| 94 | 361 if (reg_stack[--reg_sp]>=0) |
| 362 free_register(reg_stack[reg_sp]); | |
| 89 | 363 } |
| 94 | 364 freg_sp = 0; |
| 89 | 365 text_mode(); |
| 366 gexpr_code_init(); | |
| 367 register_usage("gexpr_init"); | |
| 368 } | |
| 369 | |
| 370 | |
| 371 void | |
| 372 emit_init(void) | |
| 373 { | |
| 374 int i; | |
| 375 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 376 free_all_register(); | |
| 377 reg_sp = 0; | |
| 94 | 378 freg_sp = 0; |
| 89 | 379 text_mode(); |
| 380 } | |
| 381 | |
| 382 int | |
| 383 virtual(int real) | |
| 384 { | |
| 385 int real_v,i; | |
| 386 real_v = -1; | |
| 387 for(i=0;i<MAX_REGISTER;i++) { | |
| 388 if (rname[i]==real) { | |
| 389 real_v=i; | |
| 390 break; | |
| 391 } | |
| 392 } | |
| 393 return real_v; | |
| 394 } | |
| 395 | |
| 396 int | |
| 397 pop_register(void) | |
| 398 { /* レジスタから値を取り出す */ | |
| 399 return reg_stack[--reg_sp]; | |
| 400 } | |
| 401 | |
| 402 void | |
| 403 emit_pop_free(int xreg) | |
| 404 { | |
| 159 | 405 if (xreg==dreg||xreg==creg) { |
| 89 | 406 regv[dreg]=0; |
| 98 | 407 } else if (xreg>=0) { |
| 89 | 408 free_register(xreg); |
| 409 } | |
| 410 } | |
| 411 | |
| 412 | |
| 61 | 413 int |
| 105 | 414 get_register_var(NMTBL *nptr) |
| 61 | 415 { |
| 416 int i; | |
| 417 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 418 if (! regs[i]) { /* 使われていないなら */ | |
| 419 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 420 regv[i]=0; | |
| 105 | 421 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 422 } |
| 423 } | |
| 104 | 424 return list2(LVAR,new_lvar(size_of_int)); |
| 425 } | |
| 426 | |
| 427 int | |
| 138 | 428 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 429 { |
| 138 | 430 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 431 } |
| 432 | |
| 61 | 433 void |
| 434 use_register(int virt, int real, int move) | |
| 435 { | |
| 436 int real_v; | |
| 437 char *move_op; | |
| 438 if (rname[virt]==real) | |
| 439 return; | |
| 440 real_v = virtual(real); | |
| 441 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 442 if (move || (regv[real_v])) { | |
| 443 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 444 } | |
| 445 rname[real_v] = rname[virt]; | |
| 446 rname[virt] = real; | |
| 447 } | |
| 448 | |
| 449 void | |
| 450 use_pointer(int virt, int move) | |
| 451 { | |
| 452 int i; | |
| 453 if (rname[virt]>=POINTER_REG) | |
| 454 return; | |
| 455 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 456 if (!regs[virtual(i)]) { | |
| 457 use_register(virt,i,move); | |
| 458 return; | |
| 459 } | |
| 460 } | |
| 461 /* we prefer EBX */ | |
| 462 use_register(virt,REG_EBX,move); | |
| 463 } | |
| 464 | |
| 465 void | |
| 466 use_data_reg(int virt, int move) | |
| 467 { | |
| 468 int i; | |
| 469 if (rname[virt]<MAX_DATA_REG) | |
| 470 return; | |
| 471 for(i=0;i<MAX_DATA_REG;i++) { | |
| 472 if (!regs[virtual(i)]) { | |
| 473 use_register(virt,i,move); | |
| 474 return; | |
| 475 } | |
| 476 } | |
| 477 /* we prefer EBX */ | |
| 478 use_register(virt,REG_EBX,move); | |
| 479 } | |
| 480 | |
| 481 | |
| 482 void | |
| 107 | 483 emit_push() |
| 61 | 484 { |
| 485 int new_reg; | |
| 486 new_reg = get_register(); | |
| 159 | 487 if (new_reg==creg) error(-1); |
| 61 | 488 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 489 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 490 reg_stack[reg_sp++] = -1; |
| 491 printf("\tpushl %s\n",register_name(creg,0)); | |
| 492 /* creg is used soon, don't regv[creg]=0 */ | |
| 493 } else { | |
| 494 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 495 creg = new_reg; | |
| 496 regv[creg]=1; | |
| 497 } | |
| 498 } | |
| 499 | |
| 500 int | |
| 501 emit_pop(int type) | |
| 502 { | |
| 503 int xreg; | |
| 504 if ((xreg=pop_register())==-1) { | |
| 505 if (type==POINTER_REG) | |
| 506 use_pointer(dreg,0); | |
| 507 else if (type==DATA_REG) | |
| 508 use_data_reg(dreg,0); | |
| 509 if (regv[dreg]) { | |
| 510 printf("# emit_pop dreg conflict\n"); | |
| 94 | 511 error(-1); |
| 61 | 512 } |
| 513 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 514 regv[dreg]=1; |
| 515 return dreg; | |
| 516 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 517 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 518 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 519 regv[dreg]=1; |
| 520 return dreg; | |
| 521 } | |
| 61 | 522 return xreg; |
| 523 } | |
| 524 | |
| 92 | 525 void |
| 526 code_label(int labelno) | |
| 527 { | |
| 528 printf("_%d:\n",labelno); | |
| 529 } | |
| 61 | 530 |
| 531 void | |
| 107 | 532 code_gvar(int e1,int creg) { |
| 109 | 533 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 534 regv[creg]=1; |
| 61 | 535 } |
| 536 | |
| 537 | |
| 538 void | |
| 107 | 539 code_rgvar(int e1,int creg) { |
| 109 | 540 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 541 regv[creg]=1; |
| 61 | 542 } |
| 543 | |
| 544 void | |
| 107 | 545 code_crgvar(int e1,int creg){ |
| 109 | 546 printf("\tmovsbl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 547 regv[creg]=1; |
| 61 | 548 } |
| 549 | |
| 550 | |
| 551 void | |
| 107 | 552 code_lvar(int e2,int creg) { |
| 119 | 553 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 554 regv[creg]=1; |
| 61 | 555 } |
| 556 | |
| 557 | |
| 558 void | |
| 107 | 559 code_register(int e2,int creg) { |
| 61 | 560 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 561 regv[creg]=1; |
| 61 | 562 } |
| 563 | |
| 564 | |
| 565 void | |
| 94 | 566 code_rlvar(int e2,int reg) { |
| 119 | 567 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 568 regv[creg]=1; |
| 61 | 569 } |
| 570 | |
| 571 | |
| 572 void | |
| 94 | 573 code_crlvar(int e2,int reg) { |
| 119 | 574 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 575 regv[creg]=1; |
| 61 | 576 } |
| 577 | |
| 578 | |
| 579 void | |
| 109 | 580 code_fname(NMTBL *n,int creg) { |
| 581 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 582 regv[creg]=1; |
| 61 | 583 } |
| 584 | |
| 585 | |
| 586 void | |
| 107 | 587 code_const(int e2,int creg) { |
| 61 | 588 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 589 regv[creg]=1; |
| 61 | 590 } |
| 591 | |
| 592 | |
| 593 void | |
| 107 | 594 code_neg(int creg) { |
| 61 | 595 printf("\tnegl %s\n", register_name(creg,0)); |
| 596 } | |
| 597 | |
| 598 | |
| 599 void | |
| 107 | 600 code_not(int creg) { |
| 61 | 601 printf("\tnotl %s\n", register_name(creg,0)); |
| 602 } | |
| 603 | |
| 604 | |
| 605 void | |
| 107 | 606 code_lnot(int creg) { |
| 61 | 607 char *xrn; |
| 608 use_data_reg(creg,1); | |
| 609 xrn = register_name(creg,1); | |
| 610 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 611 printf("\tsete %s\n", xrn); | |
| 612 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 613 } | |
| 614 | |
| 615 void | |
| 107 | 616 code_preinc(int e1,int e2,int reg) { |
| 61 | 617 char *xrn; |
| 618 if (car(e2)==REGISTER) { | |
| 619 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 107 | 620 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 621 regv[reg]=1; | |
| 61 | 622 return; |
| 623 } | |
| 624 g_expr(e2); | |
| 625 xrn = register_name(creg,0); | |
| 626 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 627 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 628 } | |
| 629 | |
| 630 | |
| 631 void | |
| 107 | 632 code_postinc(int e1,int e2,int reg) { |
| 61 | 633 char *xrn; |
| 634 if (car(e2)==REGISTER) { | |
| 107 | 635 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 61 | 636 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 637 regv[reg]=1; |
| 61 | 638 return; |
| 639 } | |
| 640 g_expr(e2); | |
| 641 emit_push(); | |
| 642 xrn = register_name((e2=emit_pop(0)),0); | |
| 643 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); | |
| 644 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 645 emit_pop_free(e2); | |
| 646 } | |
| 647 | |
| 648 | |
| 649 void | |
| 107 | 650 code_cpostinc(int e1,int e2,int reg) { |
| 61 | 651 char *xrn; |
| 652 if (car(e2)==REGISTER) { | |
| 89 | 653 printf("\tmovbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 654 register_name(reg,0)); |
| 61 | 655 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 107 | 656 regv[reg]=1; |
| 61 | 657 return; |
| 658 } | |
| 659 g_expr(e2); | |
| 660 emit_push(); | |
| 661 xrn = register_name((e2=emit_pop(0)),1); | |
| 662 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); | |
| 663 printf("\tincl (%s)\n",xrn); | |
| 664 emit_pop_free(e2); | |
| 665 } | |
| 666 | |
| 667 | |
| 668 void | |
| 107 | 669 code_cpreinc(int e1,int e2,int reg) { |
| 61 | 670 if (car(e2)==REGISTER) { |
| 671 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 89 | 672 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 673 register_name(reg,0)); |
| 674 regv[reg]=1; | |
| 61 | 675 return; |
| 676 } | |
| 677 g_expr(e2); | |
| 678 printf("\tincl (%s)\n",register_name(creg,0)); | |
| 679 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 680 } | |
| 681 | |
| 682 | |
| 683 void | |
| 107 | 684 code_cpostdec(int e1,int e2,int reg) { |
| 61 | 685 if (car(e2)==REGISTER) { |
| 89 | 686 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 687 register_name(reg,0)); |
| 61 | 688 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 107 | 689 regv[reg]=1; |
| 61 | 690 return; |
| 691 } | |
| 692 g_expr(e2); | |
| 693 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); | |
| 694 printf("\tdecl (%s)\n",register_name(creg,0)); | |
| 695 } | |
| 696 | |
| 697 | |
| 698 void | |
| 107 | 699 code_cpredec(int e1,int e2,int reg) { |
| 61 | 700 if (car(e2)==REGISTER) { |
| 701 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 89 | 702 printf("\tmovsbl (%s),%s\n",register_name(cadr(e2),0), |
| 107 | 703 register_name(reg,0)); |
| 704 regv[reg]=1; | |
| 705 return; | |
| 61 | 706 } |
| 707 g_expr(e2); | |
| 708 emit_push(); | |
| 709 e2 = emit_pop(0); | |
| 710 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 711 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); | |
| 712 emit_pop_free(e2); | |
| 713 } | |
| 714 | |
| 715 | |
| 716 void | |
| 107 | 717 code_return(int creg) { |
| 61 | 718 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 719 regv[creg]=1; |
| 61 | 720 } |
| 721 | |
| 722 | |
| 723 void | |
| 107 | 724 code_environment(int creg) { |
| 61 | 725 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 726 regv[creg]=1; |
| 61 | 727 } |
| 728 | |
| 729 | |
| 730 void | |
| 116 | 731 code_bool(int e1) { |
| 61 | 732 char *xrn; |
| 733 int e2,e3; | |
| 734 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 735 xrn = register_name(creg,0); | |
| 736 printf("\txorl %s,%s\n",xrn,xrn); | |
| 737 jmp(e3=fwdlabel()); | |
| 738 fwddef(e2); | |
| 739 printf("\tmovl $1,%s\n",xrn); | |
| 740 fwddef(e3); | |
| 107 | 741 regv[creg]=1; |
| 61 | 742 } |
| 743 | |
| 744 char * | |
| 745 code_gt(int cond) { | |
| 746 return (cond?"g":"le"); | |
| 747 } | |
| 748 | |
| 749 char * | |
| 750 code_ugt(int cond) { | |
| 751 return (cond?"a":"be"); | |
| 752 } | |
| 753 | |
| 754 char * | |
| 755 code_ge(int cond) { | |
| 756 return (cond?"ge":"l"); | |
| 757 } | |
| 758 | |
| 759 char * | |
| 760 code_uge(int cond) { | |
| 761 return (cond?"ae":"b"); | |
| 762 } | |
| 763 | |
| 764 char * | |
| 765 code_eq(int cond) { | |
| 766 return (cond?"e":"ne"); | |
| 767 } | |
| 768 | |
| 769 void | |
| 770 code_cmp_crgvar(int e1) { | |
| 109 | 771 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 772 } |
| 773 | |
| 774 | |
| 775 void | |
| 776 code_cmp_crlvar(int e1) { | |
| 119 | 777 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 778 } |
| 779 | |
| 780 | |
| 781 void | |
| 782 code_cmp_rgvar(int e1) { | |
| 109 | 783 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 784 } |
| 785 | |
| 786 | |
| 787 void | |
| 788 code_cmp_rlvar(int e1) { | |
| 119 | 789 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 790 } |
| 791 | |
| 792 | |
| 793 void | |
| 794 code_cmp_register(int e2) { | |
| 795 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 796 } | |
| 797 | |
| 798 | |
| 799 void | |
| 800 ascii(char *s) | |
| 801 { | |
| 802 printf("\t.string \""); | |
| 803 while(*s) { | |
| 804 if (*s=='\n') | |
| 805 printf("%cn",92); | |
| 806 else if (*s<' ') | |
| 807 printf("%c%03o",92,*s); | |
| 808 else if (*s==34) | |
| 809 printf("%c%c",92,34); | |
| 810 else | |
| 811 printf("%c",*s); | |
| 812 s++; | |
| 813 } | |
| 814 printf("%c\n",34); | |
| 815 } | |
| 816 | |
| 817 void | |
| 107 | 818 code_string(int e1,int creg) |
| 61 | 819 { |
| 820 char *s; | |
| 821 int i,lb; | |
| 822 | |
| 823 if (0) { | |
| 824 s=(char *)cadr(e1); | |
| 825 lb=fwdlabel(); | |
| 826 printf("\tjmp _%d\n",lb); | |
| 827 i=backdef(); | |
| 828 ascii(s); | |
| 829 printf("\t.align 2\n"); | |
| 830 fwddef(lb); | |
| 831 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 832 } else { | |
| 833 s=(char *)cadr(e1); | |
| 834 printf(".section\t.rodata\n"); | |
| 835 lb=fwdlabel(); | |
| 836 printf("_%d:\n",lb); | |
| 837 ascii(s); | |
| 838 if (output_mode==TEXT_EMIT_MODE) { | |
| 839 printf(".text\n"); | |
| 840 } else { | |
| 841 text_mode(); | |
| 842 } | |
| 843 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 844 } | |
| 845 } | |
| 846 | |
| 847 #define MAX_COPY_LEN 20 | |
| 848 | |
| 849 void | |
| 850 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 851 { | |
| 852 int fix = 0; | |
| 853 /* length <0 means upward direction copy */ | |
| 854 switch (length) { | |
| 855 case 0: break; | |
| 856 case 1: case -1: | |
| 857 printf("\tmovb %d(%s),%s\n",offset, | |
| 858 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 859 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 860 register_name(to,0)); | |
| 861 break; | |
| 862 case 2: case -2: | |
| 863 printf("\tmovw %d(%s),%s\n",offset, | |
| 864 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 865 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 866 register_name(to,0)); | |
| 867 break; | |
| 868 case 4: case -4: | |
| 869 printf("\tmovl %d(%s),%s\n",offset, | |
| 870 register_name(from,0), register_name(dreg,0)); | |
| 871 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 872 register_name(to,0)); | |
| 873 break; | |
| 874 default: | |
| 875 if (-MAX_COPY_LEN<length && length <0) { | |
| 876 for(;length<=4;length+=4,offset-=4) | |
| 877 emit_copy(from,to,4,offset,0,det); | |
| 878 for(;length<=2;length+=2,offset-=2) | |
| 879 emit_copy(from,to,2,offset,0,det); | |
| 880 if(length>0) | |
| 881 emit_copy(from,to,length,offset,0,det); | |
| 882 break; | |
| 883 } else if (length <=MAX_COPY_LEN) { | |
| 884 for(;length>=4;length-=4,offset+=4) | |
| 885 emit_copy(from,to,4,offset,0,det); | |
| 886 for(;length>=2;length-=2,offset+=2) | |
| 887 emit_copy(from,to,2,offset,0,det); | |
| 888 if(length>0) | |
| 889 emit_copy(from,to,length,offset,0,det); | |
| 890 break; | |
| 891 } | |
| 892 if (det) { | |
| 893 /* | |
| 894 call bcopy | |
| 895 g_expr(list3(FUNCTION,,); | |
| 896 break; | |
| 897 */ | |
| 898 } | |
| 899 use_register(from,REG_ESI,1); | |
| 900 use_register(to, REG_EDI,1); | |
| 901 use_register(dreg,REG_ECX,0); | |
| 902 if (length<0) { | |
| 903 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 904 printf("\taddl $%d,%%esi\n",-length); | |
| 905 printf("\taddl $%d,%%edi\n",-length); | |
| 906 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 907 if(length%4) { | |
| 908 emit_copy(from,to,length,offset+length/4,0,det); | |
| 909 } | |
| 910 } else { | |
| 911 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 912 fix = (length/4)*4; | |
| 913 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 914 if(length%4) { | |
| 915 emit_copy(from,to,length,offset+length/4,0,det); | |
| 916 } | |
| 917 } | |
| 918 } | |
| 919 if (value) { | |
| 920 /* creg must point top of the destination data */ | |
| 921 /* this code is necessary for the value of assignment or function call */ | |
| 922 /* otherwise we don't need this */ | |
| 923 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 924 if(creg!=to) { | |
| 925 if (to==dreg) | |
| 926 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 927 else { | |
| 928 free_register(creg); creg=to; | |
| 929 } | |
| 930 } | |
| 931 } | |
| 932 regv[from]=regv[to]=regv[dreg]=0; | |
| 933 regv[creg]=1; | |
| 934 } | |
| 935 | |
| 936 int | |
| 937 struct_push(int e4,int t) | |
| 938 { | |
| 81 | 939 int length,xreg,save,lreg,count; |
| 61 | 940 g_expr(e4); |
| 941 length=size(t); | |
| 942 if(length%size_of_int) { | |
| 943 length += size_of_int - (length%size_of_int); | |
| 944 } | |
| 81 | 945 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 946 if (length==0) return count; | |
| 947 else { | |
| 948 printf("\tpushl %d(%s)\n", | |
| 949 length-size_of_int,register_name(creg,0)); | |
| 950 } | |
| 61 | 951 } |
| 952 printf("\tsubl $%d,%%esp\n",length); | |
| 953 if (register_full()) { | |
| 954 save = 1; | |
| 955 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 956 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 957 xreg = lreg; regv[xreg]=0; | |
| 958 } else { | |
| 959 save=0; | |
| 960 xreg = get_register(); | |
| 961 } | |
| 962 if (save) | |
| 963 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 964 else | |
| 965 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 966 regv[xreg]=1; | |
| 967 /* downward direction copy */ | |
| 968 emit_copy(creg,xreg,length,0,0,1); | |
| 969 /* we have value in creg, it may be changed */ | |
| 970 if (save) { | |
| 971 if(creg==xreg) { | |
| 972 creg = get_register(); /* creg is freed in emit_copy */ | |
| 973 } | |
| 974 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 975 regv[xreg]=1; | |
| 976 } else | |
| 977 free_register(xreg); | |
| 978 return length/size_of_int; | |
| 979 } | |
| 980 | |
| 94 | 981 int |
| 61 | 982 function(int e1) |
| 983 { | |
| 127 | 984 int e2,e3,e4,nargs,t,ret_type; |
| 985 NMTBL *n=0; | |
| 61 | 986 int save,saved; |
|
136
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987 ret_type = cadr(cadddr(e1)); |
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069960078249
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988 if (ret_type==CHAR) ret_type=INT; |
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changeset
|
989 |
| 94 | 990 #ifdef SAVE_STACKS |
| 991 code_save_stacks(); | |
| 992 #endif | |
| 137 | 993 if (free_register_count(0)<1) { |
| 61 | 994 for(save = 0;save==dreg||save==creg;save++); |
| 995 printf("\tpushl %s\n",register_name(save,0)); | |
| 996 saved = 1; | |
| 997 } else { | |
| 998 save = get_register(); | |
| 999 saved = 0; | |
| 1000 } | |
| 1001 regv[save]=0; | |
| 1002 e2 = cadr(e1); | |
| 1003 nargs = 0; | |
| 1004 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 1005 t=caddr(e3); | |
| 127 | 1006 e4 = car(e3); |
| 61 | 1007 if(scalar(t)) { |
| 1008 g_expr(e4); | |
| 1009 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1010 } else if (t==DOUBLE) { |
| 1011 g_expr(e4); | |
| 1012 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1013 nargs += size_of_double/size_of_int; |
| 83 | 1014 fregv[freg]=0; |
| 82 | 1015 continue; |
| 1016 } else if (t==FLOAT) { | |
| 1017 g_expr(e4); | |
| 1018 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1019 nargs += size_of_float/size_of_int; |
| 83 | 1020 fregv[freg]=0; |
| 82 | 1021 continue; |
| 61 | 1022 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1023 nargs += struct_push(e4,t); | |
| 1024 continue; | |
| 1025 } else { | |
| 1026 error(TYERR); | |
| 1027 } | |
| 1028 ++nargs; | |
| 1029 } | |
| 1030 if (car(e2) == FNAME) { | |
| 1031 n=(NMTBL *)cadr(e2); | |
| 78 | 1032 regv[creg]=0; |
| 1033 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1034 } else { |
| 1035 g_expr(e2); | |
| 78 | 1036 regv[creg]=1; |
| 1037 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1038 } |
| 1039 | |
| 1040 /* we don't have to save creg nor dreg */ | |
| 1041 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1042 regv[dreg]= regv[save]= 0; |
| 61 | 1043 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1044 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1045 regs[creg]=1; regs[dreg]=1; | |
| 1046 | |
| 1047 if (car(e2) == FNAME) { | |
| 1048 printf("\tcall\t%s\n",n->nm); | |
| 1049 } else { | |
| 1050 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1051 } | |
| 1052 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1053 if (saved) { | |
| 1054 printf("\tpopl %s\n",register_name(save,0)); | |
| 1055 } else { | |
| 1056 free_register(save); | |
| 1057 } | |
| 1058 regv[save]=0; | |
| 105 | 1059 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1060 fregv[freg]=1; regv[creg]=0; |
| 105 | 1061 } else if (ret_type==VOID) { |
| 94 | 1062 fregv[freg]=0; regv[creg]=0; |
| 1063 } else { | |
| 1064 fregv[freg]=0; regv[creg]=1; | |
| 1065 } | |
| 105 | 1066 return ret_type; |
| 61 | 1067 } |
| 1068 | |
| 1069 void | |
| 1070 code_frame_pointer(int e3) { | |
| 1071 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1072 } | |
| 1073 | |
| 1074 | |
| 1075 void | |
| 62 | 1076 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1077 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1078 } | |
| 1079 | |
| 1080 | |
| 1081 void | |
| 1082 code_jmp(char *s) { | |
| 1083 printf("\tjmp %s\n",s); | |
| 1084 } | |
| 1085 | |
| 1086 | |
| 1087 void | |
| 1088 code_indirect_jmp(int e2) { | |
| 1089 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1090 } | |
| 1091 | |
| 94 | 1092 int |
| 61 | 1093 rindirect(int e1) /* *(p +5 ) */ |
| 1094 { | |
| 1095 char *op; | |
| 94 | 1096 int e2,e3,byte,t; |
| 61 | 1097 e3 = cadr(e2 = cadr(e1)); |
| 1098 g_expr(e2); | |
| 82 | 1099 switch (car(e1)) { |
| 1100 case FRINDIRECT: case DRINDIRECT: | |
| 1101 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); | |
| 94 | 1102 t=DOUBLE; |
| 82 | 1103 break; |
| 127 | 1104 case CRINDIRECT: case RINDIRECT: default: |
| 82 | 1105 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); |
| 61 | 1106 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1107 t=byte?CHAR:INT; |
| 82 | 1108 } |
| 94 | 1109 return t; |
| 61 | 1110 } |
| 1111 | |
| 1112 char * | |
| 1113 move(int byte) | |
| 1114 { | |
| 1115 return byte?"movb":"movl"; | |
| 1116 } | |
| 1117 | |
| 1118 void | |
| 103 | 1119 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1120 if (byte) use_data_reg(creg,1); |
| 109 | 1121 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1122 } |
| 1123 | |
| 1124 void | |
| 103 | 1125 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1126 if (byte) use_data_reg(creg,1); |
| 119 | 1127 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1128 } |
| 1129 | |
| 1130 void | |
| 111 | 1131 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1132 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1133 } | |
| 1134 | |
| 1135 void | |
| 118 | 1136 code_assign(int e2,int byte,int creg) { |
| 95 | 1137 if (byte) use_data_reg(creg,1); |
| 61 | 1138 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1139 regv[creg]=1; |
| 61 | 1140 } |
| 1141 | |
| 1142 void | |
| 1143 code_register_assop(int e2,int op,int byte) { | |
| 1144 int reg; | |
| 1145 int xreg = creg; | |
| 1146 creg = reg = e2; | |
| 1147 tosop(op,xreg); | |
| 1148 creg = xreg; | |
| 1149 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1150 regs[creg]=regv[creg]=1; |
| 61 | 1151 } |
| 1152 | |
| 1153 | |
| 1154 void | |
| 1155 code_assop(int op,int byte) { | |
| 1156 char *xrn; | |
| 1157 int xreg; | |
| 1158 int edx = edx_setup(); | |
| 1159 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1160 regv[xreg]=regs[xreg]=1; | |
| 1161 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1162 regv[edx]=1; | |
| 1163 ld_indexx(byte,0,edx); | |
| 1164 tosop(op,xreg); | |
| 1165 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); | |
| 1166 edx_cleanup(); | |
| 1167 emit_pop_free(xreg); | |
| 144 | 1168 regv[creg]=1; |
| 61 | 1169 } |
| 1170 | |
| 1171 | |
| 1172 void | |
| 1173 tosop(int op,int oreg) | |
| 1174 { | |
| 1175 int dx; | |
| 1176 char *orn,*crn; | |
| 1177 | |
| 1178 switch(op) { | |
| 1179 case LSHIFT: | |
| 1180 case ULSHIFT: | |
| 1181 shift("sall",oreg); | |
| 144 | 1182 regv[creg]=1; |
| 61 | 1183 return; |
| 1184 case RSHIFT: | |
| 1185 shift("sarl",oreg); | |
| 144 | 1186 regv[creg]=1; |
| 61 | 1187 return; |
| 1188 case URSHIFT: | |
| 1189 shift("shrl",oreg); | |
| 144 | 1190 regv[creg]=1; |
| 61 | 1191 return; |
| 1192 } | |
| 1193 if(oreg==-1) { | |
| 1194 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1195 oreg = dreg; | |
| 1196 regv[dreg]=1; | |
| 94 | 1197 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1198 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1199 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1200 oreg = dreg; |
| 1201 regv[dreg]=1; | |
| 61 | 1202 } |
| 1203 regv[oreg]=1; regs[oreg]=1; | |
| 1204 orn = register_name(oreg,0); | |
| 1205 crn = register_name(creg,0); | |
| 1206 switch(op) { | |
| 1207 case ADD: | |
| 1208 printf("\taddl %s,%s\n",orn,crn); | |
| 1209 break; | |
| 89 | 1210 case SUB: case CMP: |
| 61 | 1211 printf("\tsubl %s,%s\n",orn,crn); |
| 1212 break; | |
| 1213 case BAND: | |
| 1214 printf("\tandl %s,%s\n",orn,crn); | |
| 1215 break; | |
| 1216 case EOR: | |
| 1217 printf("\txorl %s,%s\n",orn,crn); | |
| 1218 break; | |
| 1219 case BOR: | |
| 1220 printf("\torl %s,%s\n",orn,crn); | |
| 1221 break; | |
| 1222 case MUL: | |
| 1223 case UMUL: | |
| 1224 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1225 break; | |
| 1226 case DIV: | |
| 1227 case UDIV: | |
| 1228 use_register(creg,REG_EAX,1); | |
| 1229 edx_setup(); | |
| 1230 orn = register_name(oreg,0); | |
| 1231 if (op==DIV) | |
| 127 | 1232 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1233 else |
| 127 | 1234 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1235 edx_cleanup(); |
| 1236 break; | |
| 1237 case MOD: | |
| 1238 case UMOD: | |
| 1239 use_register(creg,REG_EAX,1); | |
| 1240 edx_setup(); | |
| 1241 orn = register_name(oreg,0); | |
| 1242 if (op==DIV) | |
| 127 | 1243 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1244 else |
| 127 | 1245 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1246 dx = virtual(REG_EDX); |
| 1247 if (dx!=creg) { | |
| 1248 rname[dx]=rname[creg]; | |
| 1249 rname[creg]=REG_EDX; | |
| 1250 } | |
| 1251 edx_cleanup(); | |
| 1252 break; | |
| 1253 } | |
| 159 | 1254 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1255 free_register(oreg); |
| 94 | 1256 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1257 regv[creg]=1; |
| 61 | 1258 } |
| 1259 | |
| 1260 static int edx_stack=0; | |
| 1261 | |
| 1262 int | |
| 1263 edx_setup() | |
| 1264 { | |
| 1265 int edx_save; | |
| 1266 /* make real EDX register empty */ | |
| 137 | 1267 if (free_register_count(0)<1) { |
| 61 | 1268 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1269 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1270 edx_stack = list3(edx_save,edx_stack,0); | |
| 1271 } else { | |
| 1272 edx_save = get_register(); | |
| 1273 edx_stack = list3(edx_save,edx_stack,1); | |
| 1274 } | |
| 1275 regv[edx_save]=0; | |
| 1276 use_register(edx_save,REG_EDX,0); | |
| 1277 return edx_save; | |
| 1278 } | |
| 1279 | |
| 1280 | |
| 1281 void | |
| 1282 edx_cleanup() | |
| 1283 { | |
| 1284 if (caddr(edx_stack)==0) { | |
| 1285 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1286 } else | |
| 1287 free_register(car(edx_stack)); | |
| 1288 edx_stack = cadr(edx_stack); | |
| 1289 } | |
| 1290 | |
| 1291 void | |
| 1292 shift(char *op, int reg) | |
| 1293 { | |
| 1294 if (reg>=0) { | |
| 1295 use_register(reg,REG_ECX,1); | |
| 103 | 1296 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1297 use_register(dreg,REG_ECX,0); | |
| 119 | 1298 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1299 reg = dreg; |
| 1300 regv[dreg]=0; | |
| 61 | 1301 } else { |
| 1302 use_register(dreg,REG_ECX,0); | |
| 1303 printf("\tpopl %%ecx\n"); | |
| 103 | 1304 regv[dreg]=0; |
| 61 | 1305 } |
| 1306 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1307 } | |
| 1308 | |
| 1309 void | |
| 1310 ld_indexx(int byte, int n, int xreg) | |
| 1311 { | |
| 1312 char *op; | |
| 1313 | |
| 1314 op = byte ? "movsbl" : "movl"; | |
| 1315 if (n) | |
| 95 | 1316 printf("\t%s %d(%s),%s\n",op,n, |
| 1317 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1318 else |
| 95 | 1319 printf("\t%s (%s),%s\n",op, |
| 1320 register_name(xreg,0),register_name(creg,byte)); | |
| 1321 } | |
| 1322 | |
| 1323 int | |
| 1324 code_csvalue() | |
| 1325 { | |
| 123 | 1326 return rname[creg]; /* for switch value */ |
| 61 | 1327 } |
| 1328 | |
| 1329 void | |
| 95 | 1330 code_cmpdimm(int e, int csreg) |
| 61 | 1331 { |
| 1332 /* used in dosiwtch() */ | |
| 66 | 1333 if(chk) return; |
| 123 | 1334 use_register(creg,csreg,0); |
| 61 | 1335 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1336 } | |
| 1337 | |
| 1338 void | |
| 66 | 1339 code_opening(char *filename) |
| 61 | 1340 { |
| 1341 printf("\t.file \"%s\"\n",filename); | |
| 1342 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1343 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1344 printf(".text\n"); |
| 1345 } | |
| 1346 | |
| 1347 void | |
| 66 | 1348 code_closing() |
| 61 | 1349 { |
| 78 | 1350 global_table(); |
| 61 | 1351 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1352 } | |
| 1353 | |
| 1354 void | |
| 89 | 1355 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1356 { |
| 89 | 1357 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1358 printf("\tj%s\t_%d\n",s,l1); |
| 1359 } | |
| 1360 | |
| 82 | 1361 |
| 1362 void | |
| 61 | 1363 jcond(int l, char cond) |
| 1364 { | |
| 66 | 1365 if (chk) return; |
| 61 | 1366 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1367 } | |
| 1368 | |
| 1369 void | |
| 1370 jmp(int l) | |
| 1371 { | |
| 1372 control=0; | |
| 66 | 1373 if (chk) return; |
| 61 | 1374 printf("\tjmp\t_%d\n",l); |
| 1375 /* align? */ | |
| 1376 /* | |
| 1377 this is not allowed because of ? operator | |
| 1378 regv[creg]=regv[dreg]=0; | |
| 1379 use_register(creg,REG_EAX,0); | |
| 1380 use_register(dreg,REG_EBX,0); | |
| 1381 */ | |
| 1382 } | |
| 1383 | |
| 1384 void | |
| 1385 gen_comment(char *s) | |
| 1386 { | |
| 66 | 1387 if (chk) return; |
| 1388 printf("## %s",s); | |
| 61 | 1389 } |
| 1390 | |
| 1391 | |
| 1392 void | |
| 1393 code_enter(char *name) | |
| 1394 { | |
| 1395 printf("\t.align 4\n"); | |
| 1396 if (stmode!=STATIC) | |
| 1397 printf(".globl %s\n",name); | |
| 1398 printf("\t.type\t%s,@function\n",name); | |
| 1399 printf("%s:\n",name); | |
| 1400 } | |
| 1401 | |
| 77 | 1402 |
| 61 | 1403 void |
| 1404 code_enter1(int args) | |
| 1405 { | |
| 1406 code_disp_label=fwdlabel(); | |
| 1407 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1408 | |
| 1409 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1410 } | |
| 1411 | |
| 1412 void | |
| 1413 code_leave(char *name) | |
| 1414 { | |
| 63 | 1415 disp&= -size_of_int; |
| 61 | 1416 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1417 printf("_%d:\n",labelno); | |
| 1418 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1419 local_table(); | |
| 1420 labelno++; | |
| 1421 free_all_register(); | |
| 1422 } | |
| 1423 | |
| 1424 void | |
| 1425 enter(char *name) | |
| 1426 { | |
| 1427 printf("\t.align 2\n"); | |
| 1428 if (stmode!=STATIC) | |
| 1429 printf(".globl %s\n",name); | |
| 1430 printf("%s:\n",name); | |
| 1431 printf("\t.type\t%s,@function\n",name); | |
| 1432 printf("\tpushl %%ebp\n"); | |
| 1433 printf("\tmovl %%esp,%%ebp\n"); | |
| 1434 printf("\tpushl %%ebx\n"); | |
| 1435 printf("\tpushl %%esi\n"); | |
| 1436 printf("\tpushl %%edi\n"); | |
| 1437 } | |
| 1438 | |
| 1439 void | |
| 1440 enter1() | |
| 1441 { | |
| 1442 func_disp_label=fwdlabel(); | |
| 1443 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1444 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1445 } | |
| 1446 | |
| 1447 void | |
| 1448 leave(int control, char *name) | |
| 1449 { | |
| 128 | 1450 int sz; |
| 1451 | |
| 1452 disp &= -size_of_int; | |
| 61 | 1453 if (control) |
| 108 | 1454 code_set_return_register(1); |
| 61 | 1455 if (retcont) { |
| 1456 if (control) | |
| 1457 jmp(retlabel); | |
| 1458 fwddef(retcont); | |
| 128 | 1459 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1460 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1461 } else if (cadr(fnptr->ty)>0&&( | |
| 1462 car(cadr(fnptr->ty))==STRUCT || | |
| 1463 car(cadr(fnptr->ty))==UNION)) { | |
| 1464 sz = size(cadr(fnptr->ty)); | |
| 1465 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1466 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1467 register_name(creg,0)); | |
| 1468 emit_copy(dreg,creg,sz,0,1,1); | |
| 1469 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1470 use_register(creg,REG_EAX,0); | |
| 1471 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1472 } | |
| 61 | 1473 } |
| 1474 fwddef(retlabel); | |
| 63 | 1475 |
| 61 | 1476 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1477 printf("\tpopl %%edi\n"); | |
| 1478 printf("\tpopl %%esi\n"); | |
| 1479 printf("\tpopl %%ebx\n"); | |
| 1480 printf("\tleave\n"); | |
| 1481 printf("\tret\n"); | |
| 1482 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1483 printf("_%d:\n",labelno); | |
| 1484 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1485 local_table(); | |
| 1486 labelno++; | |
| 1487 free_all_register(); | |
| 1488 } | |
| 1489 | |
| 1490 | |
| 1491 void | |
| 108 | 1492 code_set_fixed_creg(int mode,int type) { |
| 1493 if (type==FLOAT||type==DOUBLE) { | |
| 1494 } else | |
| 1495 use_register(creg,REG_EAX,mode); | |
| 61 | 1496 } |
| 1497 | |
| 1498 void | |
| 107 | 1499 code_set_return_register(int mode) { |
| 1500 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1501 } else { | |
| 1502 use_register(creg,REG_EAX,mode); | |
| 1503 } | |
| 1504 } | |
| 1505 | |
| 1506 void | |
| 61 | 1507 gen_gdecl(char *n, int gpc) |
| 1508 { | |
| 1509 /* | |
| 1510 if (stmode!=STATIC) | |
| 1511 printf(".globl %s\n",n); | |
| 1512 */ | |
| 1513 } | |
| 1514 | |
| 1515 void | |
| 1516 align(int t) | |
| 1517 { | |
| 1518 if (t!=CHAR) { | |
| 1519 if (data_alignment & 1) | |
| 1520 printf("\t.align 2\n"); | |
| 1521 data_alignment = 0; | |
| 1522 } | |
| 1523 } | |
| 1524 | |
| 1525 void | |
| 1526 emit_data(int e, int t, NMTBL *n) | |
| 1527 { | |
| 1528 int l; | |
| 82 | 1529 double d; |
| 1530 float f; | |
| 61 | 1531 char *name; |
| 1532 name = n->nm; | |
| 156 | 1533 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1534 error(-1); return; |
| 1535 } | |
| 66 | 1536 if (chk) return; |
| 61 | 1537 if (n->dsp != -1) { |
| 1538 n->dsp = -1; /* initiallized flag */ | |
| 1539 printf(".globl\t%s\n",name); | |
| 1540 data_mode(name); | |
| 1541 align(t); | |
| 1542 printf("%s:\n",name); | |
| 1543 } else { | |
| 1544 data_mode(0); | |
| 1545 } | |
| 1546 if(car(e)==CONST) { | |
| 1547 if (t==CHAR) { | |
| 1548 printf("\t.byte %d\n",cadr(e)); | |
| 1549 if (data_alignment>0) | |
| 1550 data_alignment++; | |
| 1551 gpc += 1; | |
| 82 | 1552 } else if (t==SHORT) { |
| 1553 printf("\t.word %d\n",cadr(e)); | |
| 1554 if (data_alignment>0) data_alignment++; | |
| 1555 gpc += 2; | |
| 61 | 1556 } else { |
| 1557 printf("\t.long %d\n",cadr(e)); | |
| 1558 gpc += size_of_int; | |
| 1559 } | |
| 82 | 1560 } else if(t==DOUBLE) { |
| 1561 d = dcadr(e); | |
| 1562 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1563 } else if(t==FLOAT) { | |
| 1564 f = dcadr(e); | |
| 1565 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1566 } else if(t!=CHAR) { |
| 1567 gpc += size_of_int; | |
| 1568 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1569 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1570 } else if(car(e)==GVAR) { | |
| 1571 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1572 } else if(car(e)==FNAME) { |
| 1573 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1574 } else if(car(e)==STRING) { | |
| 1575 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1576 l = fwdlabel(); | |
| 1577 printf("\t.long _%d\n",l); | |
| 1578 printf(".section\t.rodata\n"); | |
| 1579 printf("_%d:\n",l); | |
| 1580 output_mode = RODATA_EMIT_MODE; | |
| 1581 } | |
| 1582 ascii((char *)cadr(e)); | |
| 1583 } else error(TYERR); | |
| 1584 } | |
| 1585 } | |
| 1586 | |
| 1587 void | |
| 1588 emit_data_closing(NMTBL *n) | |
| 1589 { | |
| 1590 int lb; | |
| 66 | 1591 if (chk) return; |
| 61 | 1592 if (mode==GDECL) { |
| 1593 data_mode(0); | |
| 1594 lb=fwdlabel(); | |
| 1595 printf("_%d:\n",lb); | |
| 1596 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1597 } | |
| 1598 } | |
| 1599 | |
| 1600 void | |
| 1601 global_table(void) | |
| 1602 { | |
| 1603 NMTBL *n; | |
| 1604 int init; | |
| 1605 init=0; | |
| 1606 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1607 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1608 /* n->dsp = -1 means initialized global */ |
| 1609 if (init==0) { | |
| 1610 data_mode(0); | |
| 1611 init=1; | |
| 1612 } | |
| 1613 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1614 } | |
| 1615 } | |
| 1616 } | |
| 1617 | |
| 1618 void | |
| 1619 local_table(void) | |
| 1620 { | |
| 1621 NMTBL *n; | |
| 1622 int init; | |
| 1623 init=0; | |
| 1624 /* static local variables */ | |
| 1625 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1626 if (n->sc == GVAR) { | |
| 1627 if (init==0) { | |
| 1628 data_mode(0); | |
| 1629 init=1; | |
| 1630 } | |
| 156 | 1631 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1632 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1633 } |
| 1634 } | |
| 1635 } | |
| 1636 | |
| 1637 void | |
| 1638 text_mode(void) | |
| 1639 { | |
| 1640 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1641 printf(".text\n"); | |
| 1642 printf("\t.align 2\n"); | |
| 1643 output_mode = TEXT_EMIT_MODE; | |
| 1644 } | |
| 1645 } | |
| 1646 | |
| 1647 void | |
| 1648 data_mode(char *name) | |
| 1649 { | |
| 1650 if (output_mode!=DATA_EMIT_MODE) { | |
| 1651 printf(".data\n"); | |
| 1652 output_mode = DATA_EMIT_MODE; | |
| 1653 } | |
| 1654 if (name) | |
| 1655 printf("\t.type\t%s,@object\n",name); | |
| 1656 } | |
| 1657 | |
| 81 | 1658 /* floating point */ |
| 1659 | |
| 1660 | |
| 82 | 1661 char * |
| 1662 fstore(int d) | |
| 1663 { | |
| 83 | 1664 return use? |
| 1665 (d?"fstl":"fsts"): | |
| 1666 (d?"fstpl":"fstps") | |
| 1667 ; | |
| 1668 } | |
| 1669 | |
| 1670 char * | |
| 1671 fstore_u(int d) | |
| 1672 { | |
| 82 | 1673 return d?"fstpl":"fstps"; |
| 1674 } | |
| 81 | 1675 |
| 82 | 1676 char * |
| 1677 fload(int d) | |
| 1678 { | |
| 1679 return d?"fldl":"flds"; | |
| 1680 } | |
| 81 | 1681 |
| 1682 | |
| 103 | 1683 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1684 { |
| 109 | 1685 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1686 } |
| 1687 | |
| 103 | 1688 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1689 { |
| 119 | 1690 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1691 } |
| 1692 | |
| 138 | 1693 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1694 { |
| 1695 error(-1); | |
| 1696 } | |
| 1697 | |
| 103 | 1698 void code_dassign(int e2,int freg,int d) |
| 82 | 1699 { |
| 1700 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1701 } | |
| 1702 | |
| 1703 static double d0 = 1.0; | |
| 81 | 1704 |
| 82 | 1705 int |
| 1706 code_d1(double d) | |
| 1707 { | |
| 1708 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1709 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1710 } | |
| 1711 | |
| 1712 int | |
| 1713 code_d2(double d) | |
| 1714 { | |
| 1715 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1716 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1717 } | |
| 1718 | |
| 138 | 1719 void code_dconst(int e2,int freg,int d) |
| 82 | 1720 { |
| 1721 int lb; | |
| 138 | 1722 double value = dcadr(e2); |
| 81 | 1723 |
| 138 | 1724 if (value==0.0) { |
| 82 | 1725 printf("\tfldz\n"); return; |
| 1726 } | |
| 138 | 1727 if (value==1.0) { |
| 82 | 1728 printf("\tfld1\n"); return; |
| 1729 } | |
| 1730 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1731 lb=fwdlabel(); | |
| 1732 printf("_%d:\n",lb); | |
| 138 | 1733 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1734 if (output_mode==TEXT_EMIT_MODE) { |
| 1735 printf(".text\n"); | |
| 1736 } else { | |
| 1737 text_mode(); | |
| 1738 } | |
| 1739 printf("\tfldl _%d\n",lb); | |
| 1740 } | |
| 1741 | |
| 138 | 1742 void code_dneg(int freg,int d) |
| 82 | 1743 { |
| 1744 printf("\tfchs\n"); | |
| 1745 } | |
| 81 | 1746 |
| 147 | 1747 void code_d2i(int freg) |
| 82 | 1748 { |
| 1749 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1750 printf("\tfnstcw (%%esp)\n"); | |
| 1751 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1752 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1753 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1754 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1755 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1756 printf("\tfldcw (%%esp)\n"); |
| 82 | 1757 printf("\tpopl %s\n",register_name(creg,0)); |
| 1758 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1759 } | |
| 81 | 1760 |
| 147 | 1761 void code_i2d(int creg) |
| 82 | 1762 { |
| 1763 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1764 printf("\tfildl (%%esp)\n"); | |
| 1765 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1766 } | |
| 1767 | |
| 147 | 1768 void code_d2u(int freg) |
| 85 | 1769 { |
| 86 | 1770 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1771 printf("\tfnstcw (%%esp)\n"); |
| 1772 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1773 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1774 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1775 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1776 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1777 printf("\tfldcw (%%esp)\n"); |
| 86 | 1778 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1779 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1780 } |
| 1781 | |
| 147 | 1782 void code_u2d(int creg) |
| 85 | 1783 { |
| 86 | 1784 printf("\tpushl %s\n",register_name(creg,0)); |
| 1785 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1786 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1787 printf("\tfildll (%%esp)\n"); | |
| 1788 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1789 } |
| 1790 | |
| 133 | 1791 void code_d2f(int freg) { } |
| 1792 void code_f2d(int freg) { } | |
| 147 | 1793 void code_f2i(int freg) { code_d2i(freg); } |
| 1794 void code_f2u(int freg) { code_d2u(freg); } | |
| 1795 void code_i2f(int creg) { code_i2d(creg); } | |
| 1796 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1797 |
| 107 | 1798 void code_drgvar(int e2,int d,int freg) |
| 82 | 1799 { |
| 109 | 1800 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1801 } |
| 81 | 1802 |
| 1803 | |
| 107 | 1804 void code_drlvar(int e2,int d,int freg) |
| 82 | 1805 { |
| 119 | 1806 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1807 } |
| 1808 | |
| 138 | 1809 void code_cmp_drgvar(int e2,int d) |
| 82 | 1810 { |
| 109 | 1811 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1812 } |
| 1813 | |
| 138 | 1814 void code_cmp_drlvar(int e2,int d) |
| 82 | 1815 { |
| 119 | 1816 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1817 } |
| 1818 | |
| 1819 void dtosop(int op,int e1) | |
| 94 | 1820 { |
| 82 | 1821 switch(op) { |
| 133 | 1822 case FADD: |
| 82 | 1823 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1824 case FSUB: |
| 85 | 1825 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1826 case FDIV: |
| 85 | 1827 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1828 case FMUL: |
| 82 | 1829 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1830 case FCMP: |
| 89 | 1831 case DCMP: |
| 82 | 1832 printf("\tfucompp\n"); |
| 1833 printf("\tfnstsw\t%%ax\n"); | |
| 1834 break; | |
| 1835 } | |
| 1836 } | |
| 81 | 1837 |
| 83 | 1838 void |
| 1839 code_dassop(int op,int d) { | |
| 1840 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1841 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1842 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1843 dtosop(op,0); | |
| 1844 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1845 } | |
| 1846 | |
| 1847 void | |
| 107 | 1848 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1849 g_expr(e2); |
| 1850 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1851 printf("\tfld1\n"); | |
| 87 | 1852 if (caddr(e1)>0) |
| 83 | 1853 printf("\tfaddp %%st,%%st(1)\n"); |
| 1854 else | |
| 1855 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1856 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1857 } | |
| 1858 | |
| 1859 void | |
| 107 | 1860 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1861 g_expr(e2); |
| 1862 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1863 if (use) | |
| 86 | 1864 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1865 printf("\tfld1\n"); |
| 87 | 1866 if (caddr(e1)>0) |
| 83 | 1867 printf("\tfaddp %%st,%%st(1)\n"); |
| 1868 else | |
| 1869 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1870 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1871 } |
| 1872 | |
| 84 | 1873 void |
| 1874 drexpr(int e1, int e2,int l1, int op) | |
| 1875 { | |
| 89 | 1876 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1877 switch(op) { |
| 1878 case DOP+GE: | |
| 133 | 1879 case FOP+GE: |
| 84 | 1880 printf("\ttestb\t$5,%%ah\n"); |
| 1881 printf("\tjne\t_%d\n",l1); | |
| 1882 break; | |
| 1883 case DOP+GT: | |
| 133 | 1884 case FOP+GT: |
| 84 | 1885 printf("\ttestb\t$69,%%ah\n"); |
| 1886 printf("\tjne\t_%d\n",l1); | |
| 1887 break; | |
| 1888 case DOP+EQ: | |
| 133 | 1889 case FOP+EQ: |
| 84 | 1890 printf("\tandb\t$69,%%ah\n"); |
| 1891 printf("\txorb\t$64,%%ah\n"); | |
| 1892 printf("\tjne\t_%d\n",l1); | |
| 1893 break; | |
| 1894 case DOP+NEQ: | |
| 133 | 1895 case FOP+NEQ: |
| 84 | 1896 printf("\tandb\t$69,%%ah\n"); |
| 1897 printf("\txorb\t$64,%%ah\n"); | |
| 1898 printf("\tje\t_%d\n",l1); | |
| 1899 break; | |
| 1900 } | |
| 1901 } | |
| 1902 | |
| 94 | 1903 void |
| 138 | 1904 code_dregister(int e2,int freg,int d) |
| 94 | 1905 { |
| 1906 error(-1); | |
| 1907 } | |
| 1908 | |
| 138 | 1909 void |
| 1910 code_cmp_dregister(int e2,int d) | |
| 94 | 1911 { |
| 1912 error(-1); | |
| 82 | 1913 } |
| 81 | 1914 |
| 97 | 1915 int pop_fregister() |
| 82 | 1916 { |
| 94 | 1917 if (freg_sp<0) { error(-1); return -1;} |
| 1918 printf("# fpop: %d\n",freg_sp-1); | |
| 1919 return freg_stack[--freg_sp]; | |
| 82 | 1920 } |
| 81 | 1921 |
| 94 | 1922 int |
| 138 | 1923 emit_dpop(int d) |
| 94 | 1924 { |
| 1925 int xreg; | |
| 97 | 1926 if ((xreg=pop_fregister())==-1) { |
| 94 | 1927 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1928 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1929 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1930 /* pushed order is reversed. We don't need this for comutable |
| 1931 operator, but it is ok to do this. */ | |
| 1932 printf("\tfxch\t%%st(1)\n"); | |
| 1933 } | |
| 1934 return xreg; | |
| 1935 } | |
| 1936 | |
| 1937 | |
| 138 | 1938 void emit_dpop_free(int e1,int d) |
| 82 | 1939 { |
| 1940 } | |
| 81 | 1941 |
| 133 | 1942 void emit_dpush(int type) |
| 82 | 1943 { |
| 119 | 1944 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1945 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1946 freg_stack[freg_sp++]=-1; |
| 94 | 1947 printf("# fpush:%d\n",freg_sp); |
| 1948 } | |
| 1949 | |
| 1950 void | |
| 1951 code_save_stacks() | |
| 1952 { | |
| 1953 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1954 int xreg,sp,screg; | |
| 1955 sp=reg_sp; | |
| 1956 while(sp-->0) { | |
| 1957 if ((xreg=reg_stack[sp])>=0) { | |
| 1958 screg=creg; | |
| 1959 if(creg!=xreg) { | |
| 1960 if (xreg!=dreg) free_register(xreg); | |
| 1961 creg = xreg; | |
| 1962 } | |
| 1963 code_assign_lvar( | |
| 119 | 1964 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1965 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1966 regv[xreg]=0; | |
| 1967 creg=screg; | |
| 1968 } | |
| 1969 } | |
| 107 | 1970 code_save_fstacks(); |
| 1971 } | |
| 1972 | |
| 1973 void | |
| 1974 code_save_fstacks() | |
| 1975 { | |
| 127 | 1976 int xreg,sp,uses; |
| 1977 uses = use; use = 0; | |
| 94 | 1978 sp=freg_sp; |
| 1979 while(sp-->0) { | |
| 1980 if ((xreg=freg_stack[sp])==-1) { | |
| 1981 code_dassign_lvar( | |
| 119 | 1982 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1983 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 1984 } | |
| 1985 } | |
| 127 | 1986 use = uses; |
| 82 | 1987 } |
| 81 | 1988 |
| 61 | 1989 /* end */ |