Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 182:e1e9ec8c96a7
some fix
| author | kono |
|---|---|
| date | Sun, 30 Nov 2003 21:15:24 +0900 |
| parents | 3b33c7daae95 |
| children | 1d80ad165831 |
| 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 |
| 173 | 9 char *l_include_path[] = { |
| 10 "/usr/include/", | |
| 182 | 11 "/usr/include/linux/", |
| 173 | 12 0 |
| 13 }; | |
| 14 | |
| 15 | |
| 94 | 16 #define SAVE_STACKS 1 |
| 17 | |
| 61 | 18 #define TEXT_EMIT_MODE 0 |
| 19 #define DATA_EMIT_MODE 1 | |
| 20 #define RODATA_EMIT_MODE 2 | |
| 21 | |
| 22 static int output_mode = TEXT_EMIT_MODE; | |
| 23 static int data_alignment = 0; | |
| 24 | |
| 119 | 25 int size_of_int = 4; |
| 165 | 26 int size_of_short = 2; |
| 119 | 27 int size_of_float = 4; |
| 28 int size_of_double = 8; | |
| 29 int size_of_longlong = 8; | |
| 30 int endian = 0; | |
| 31 int MAX_REGISTER=6; /* intel386のレジスタを6つまで使う*/ | |
| 32 #define REAL_MAX_REGISTER 8 /* intel386のレジスタが8つということ*/ | |
| 33 int MAX_DATA_REG=4; | |
| 34 int MAX_POINTER=3; | |
| 35 int MAX_REGISTGER_VAR=2; | |
| 36 int MAX_FREGISTER=1; | |
| 37 | |
| 38 #define MAX_FPU_STACK 7 | |
| 39 | |
| 40 int MAX_INPUT_REGISTER_VAR = 0; | |
| 41 int MAX_CODE_INPUT_REGISTER_VAR = 2; | |
| 42 int MAX_INPUT_DREGISTER_VAR = 0; | |
| 138 | 43 int MAX_INPUT_FREGISTER_VAR = 0; |
| 119 | 44 int MAX_CODE_INPUT_DREGISTER_VAR = 0; |
| 61 | 45 |
| 138 | 46 int reg_sp; /* REGister Stack-Pointer */ |
| 47 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 48 | |
| 49 /* floating point registers */ | |
| 50 | |
| 51 int freg_sp; /* floating point REGister Stack-Pointer */ | |
| 52 int freg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 53 | |
| 54 | |
| 61 | 55 /* |
| 128 | 56 -28 -8 local2 |
| 57 -24 -4 local1 | |
| 58 -20 8 arg3 | |
| 59 -16 4 arg2 | |
| 60 -12 0 arg1 | |
| 61 local2 -20 4 -8 (%edi) | |
| 62 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 63 %edi -12 <- disp_offset %ebp |
| 64 %esi -8 | |
| 65 %ebx -4 | |
| 66 %ebp = %esp 0 | |
| 67 %eip 4 <- arg_offset | |
| 68 arg1 8 0 | |
| 69 arg2 12 4 | |
| 70 see enter/enter1/leave see code_enter | |
| 71 */ | |
| 72 int arg_offset = 8; | |
| 73 int disp_offset = -12; | |
| 74 int func_disp_offset = -12; | |
| 75 int code_disp_offset = 0; | |
| 76 int jump_offset = 0; | |
| 77 | |
| 119 | 78 static int code_disp_label; |
| 79 static int func_disp_label; | |
| 61 | 80 |
| 119 | 81 static int |
| 82 lvar(int l) | |
| 83 { | |
| 84 if (is_code(fnptr)) { | |
| 85 return l+code_disp_offset; | |
| 86 } else if (l<0) { | |
| 87 return l+disp_offset; | |
| 88 } else { | |
| 89 return l+arg_offset; | |
| 90 } | |
| 91 } | |
| 99 | 92 |
| 95 | 93 /* |
| 94 creg currrent virtual register | |
| 95 dreg spare virtual register | |
| 96 | |
| 97 rname[creg] currrent real register | |
| 98 rname[dreg] spare real register | |
| 99 | |
| 100 regs[] virtual register usage | |
| 101 regv[] value in virtual register flag | |
| 102 | |
| 103 reg_name[rname[creg]] | |
| 104 | |
| 105 freg current floating point register | |
| 106 fregv calue in floating point register | |
| 107 */ | |
| 108 | |
| 109 static int dreg; /* general temporal register */ | |
| 110 | |
| 111 int ia32regs[REAL_MAX_REGISTER]; | |
| 112 int ia32regv[REAL_MAX_REGISTER]; | |
| 113 int ia32rname[REAL_MAX_REGISTER]; | |
| 114 | |
| 115 int *regv = ia32regv; | |
| 116 int *regs = ia32regs; | |
| 117 static int *rname = ia32rname; | |
| 118 | |
| 119 int ia32fregs[1]; | |
| 120 int ia32fregv[1]; | |
| 121 | |
| 122 int freg; | |
| 123 int *fregv = ia32fregv; | |
| 124 int *fregs = ia32fregs; | |
| 125 | |
| 61 | 126 |
| 127 #define REG_EAX 0 | |
| 128 #define REG_EBX 1 | |
| 129 #define REG_ECX 2 | |
| 130 #define REG_EDX 3 | |
| 131 #define REG_ESI 4 | |
| 132 #define REG_EDI 5 | |
| 133 #define REG_EBP 6 | |
| 134 #define REG_ESP 7 | |
| 135 | |
| 136 | |
| 137 #define DATA_REG 0 | |
| 138 #define POINTER_REG 3 | |
| 139 static char *reg_name[8]; | |
| 140 static char *reg_name_l[4]; | |
| 141 static char *reg_name_w[4]; | |
| 142 | |
| 93 | 143 static void use_register(int virt, int real, int move); |
| 144 static int virtual(int real); | |
| 145 static void shift(char *op, int reg); | |
| 163 | 146 static void ld_indexx(int byte, int n, int xreg,int sign); |
| 93 | 147 static void data_mode(char *name); |
| 148 static int edx_setup(); | |
| 149 static void edx_cleanup(); | |
| 150 static void local_table(void); | |
| 151 static char * fload(int d); | |
| 152 static int code_d1(double d); | |
| 153 static int code_d2(double d); | |
| 94 | 154 static void code_save_stacks(); |
| 107 | 155 static void code_save_fstacks(); |
| 82 | 156 |
| 61 | 157 void |
| 158 code_init(void) | |
| 159 { | |
| 173 | 160 macro_define("__i386__ 1\n"); |
| 182 | 161 macro_define("__LITTLE_ENDIAN__ 1\n"); |
| 162 macro_define("__STDC__ 1\n"); | |
| 163 macro_define("size_t int\n"); | |
| 164 macro_define("__externsion__\n"); | |
| 165 macro_define("__flexarr\n"); | |
| 173 | 166 |
| 61 | 167 arg_offset = 8; |
| 168 func_disp_offset = -12; | |
| 169 disp_offset = -12; | |
| 170 size_of_int = 4; | |
| 171 endian = 0; | |
| 172 MAX_REGISTER=6; | |
| 173 MAX_DATA_REG=4; | |
| 174 MAX_POINTER=3; | |
| 175 MAX_REGISTER_VAR=2; | |
| 176 | |
| 177 reg_name[REG_EAX] = "%eax"; | |
| 178 reg_name[REG_EBX] = "%ebx"; | |
| 179 reg_name[REG_ECX] = "%ecx"; | |
| 180 reg_name[REG_EDX] = "%edx"; | |
| 181 reg_name[REG_ESI] = "%esi"; | |
| 182 reg_name[REG_EDI] = "%edi"; | |
| 183 reg_name[REG_EBP] = "%ebp"; | |
| 184 reg_name[REG_ESP] = "%esp"; | |
| 185 reg_name_l[REG_EAX] = "%al"; | |
| 186 reg_name_l[REG_EBX] = "%bl"; | |
| 187 reg_name_l[REG_ECX] = "%cl"; | |
| 188 reg_name_l[REG_EDX] = "%dl"; | |
| 189 reg_name_w[REG_EAX] = "%ax"; | |
| 190 reg_name_w[REG_EBX] = "%bx"; | |
| 191 reg_name_w[REG_ECX] = "%cx"; | |
| 192 reg_name_w[REG_EDX] = "%dx"; | |
| 193 | |
| 194 } | |
| 195 | |
| 196 char * | |
| 197 register_name(int i,int byte) | |
| 198 { | |
| 199 if (i<0) { | |
| 200 error(REG_ERR); | |
| 201 return "%eax"; | |
| 202 } | |
| 165 | 203 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 204 return reg_name_l[rname[i]]; |
| 165 | 205 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 206 return reg_name_w[rname[i]]; | |
| 61 | 207 } else { |
| 168 | 208 return reg_name[rname[i]]; /* 0 or 4 means int */ |
| 61 | 209 } |
| 210 } | |
| 211 | |
| 147 | 212 int use_int(int i) { return i;} |
| 213 int use_float(int i) { return i;} | |
| 214 int use_double(int i) { return i;} | |
| 215 | |
| 61 | 216 void |
| 217 gexpr_code_init(void){ | |
| 218 use_register(creg,REG_EAX,0); | |
| 94 | 219 regv[creg]=0; |
| 61 | 220 regv[dreg]=0; |
| 221 } | |
| 222 | |
| 147 | 223 void |
| 224 code_gexpr(int e){ | |
| 225 } | |
| 226 | |
| 61 | 227 int |
| 228 register_var(int r) { | |
| 229 return virtual(r+REG_ESI); | |
| 230 } | |
| 231 | |
| 89 | 232 int |
| 233 get_register(void) | |
| 234 { /* 使われていないレジスタを調べる */ | |
| 235 int i; | |
| 236 for(i=0;i<MAX_REGISTER;i++) { | |
| 237 if (! regs[i]) { /* 使われていないなら */ | |
| 238 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 239 return i; /* その場所を表す番号を返す */ | |
| 240 } | |
| 241 } | |
| 242 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 243 } | |
| 244 | |
| 245 void | |
| 246 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 247 regv[i]=regs[i]=0; | |
| 248 } | |
| 249 | |
| 99 | 250 int |
| 126 | 251 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 252 { |
| 126 | 253 if (is_code) { |
| 254 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 255 i = virtual(i+REG_ESI); | |
| 256 regs[i]=regv[i]=1; | |
| 257 return list3(REGISTER,i,(int)nptr); | |
| 258 } else { | |
| 259 return 0; | |
| 260 } | |
| 99 | 261 } |
| 103 | 262 |
| 99 | 263 int |
| 138 | 264 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 265 { |
| 126 | 266 return 0; |
| 99 | 267 } |
| 268 | |
| 269 int | |
| 138 | 270 get_dregister(int d) |
| 99 | 271 { |
| 272 return -1; | |
| 273 } | |
| 274 | |
| 89 | 275 int |
| 276 register_full(void) | |
| 277 { | |
| 278 int i; | |
| 279 for(i=0;i<MAX_REGISTER;i++) { | |
| 280 if (! regs[i]) { | |
| 281 return 0; | |
| 282 } | |
| 283 } | |
| 284 return 1; | |
| 285 } | |
| 286 | |
| 287 int | |
| 137 | 288 free_register_count(int d) |
| 89 | 289 { |
| 290 int i,count; | |
| 291 count = 0; | |
| 292 for(i=0;i<MAX_REGISTER;i++) { | |
| 293 if (! regs[i] && ! regv[i]) count++; | |
| 294 } | |
| 137 | 295 return d?0:count; |
| 89 | 296 } |
| 297 | |
| 298 void | |
| 299 free_all_register(void) | |
| 300 { | |
| 301 int i; | |
| 302 for(i=0;i<MAX_REGISTER;i++) { | |
| 303 regs[i]=regv[i]=0; | |
| 304 } | |
| 305 creg = get_register(); | |
| 306 dreg = get_register(); | |
| 307 return; | |
| 308 } | |
| 309 | |
| 310 | |
| 311 void | |
| 312 register_usage(char *s) | |
| 313 { | |
| 314 int i; | |
| 315 if (chk) return; | |
| 316 printf("# %d: %s:",lineno,s); | |
| 317 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 318 for(i=0;i<MAX_REGISTER;i++) { | |
| 319 printf("%d",regs[i]); | |
| 320 } | |
| 321 printf(":"); | |
| 322 for(i=0;i<MAX_REGISTER;i++) { | |
| 323 printf("%d",regv[i]); | |
| 324 } | |
| 325 #if 0 | |
| 326 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 327 for(i=reg_sp;i>=0;i--) { | |
| 328 if(reg_stack[i]>=0) | |
| 329 printf(" %s",register_name(reg_stack[i],0)); | |
| 330 } | |
| 331 #endif | |
| 94 | 332 printf(" f:%d",freg_sp); |
| 89 | 333 printf("\n"); |
| 334 } | |
| 335 | |
| 109 | 336 void |
| 137 | 337 code_arg_register(NMTBL *fnptr) |
| 109 | 338 { |
| 137 | 339 int args = fnptr->dsp; |
| 340 NMTBL *n; | |
| 341 int reg_var = 0; | |
| 342 int freg_var = 0; | |
| 343 int type; | |
| 344 int reg; | |
| 345 int is_code0 = is_code(fnptr); | |
| 346 | |
| 347 while (args) { | |
| 348 /* process in reverse order */ | |
| 349 n = (NMTBL*)caddr(args); | |
| 350 type = n->ty; | |
| 351 if (scalar(type)) { | |
| 352 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 353 n->sc = REGISTER; | |
| 354 n->dsp = cadr(reg); | |
| 355 regv[n->dsp]= 1; | |
| 356 regs[n->dsp]= INPUT_REG; | |
| 357 reg_var++; | |
| 358 cadddr(args)=size_of_int; /* why we need this? */ | |
| 359 } | |
| 360 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 361 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 362 n->sc = DREGISTER; |
| 363 n->dsp = cadr(reg); | |
| 364 fregv[n->dsp]= 1; | |
| 365 fregs[n->dsp]= INPUT_REG; | |
| 366 freg_var++; | |
| 367 cadddr(args)=size(type); /* why we need this? */ | |
| 368 } | |
| 369 } | |
| 370 args = cadr(args); | |
| 371 } | |
| 109 | 372 } |
| 373 | |
| 89 | 374 void |
| 375 gexpr_init(void) | |
| 376 { | |
| 377 while(reg_sp > 0) { | |
| 94 | 378 if (reg_stack[--reg_sp]>=0) |
| 379 free_register(reg_stack[reg_sp]); | |
| 89 | 380 } |
| 94 | 381 freg_sp = 0; |
| 89 | 382 text_mode(); |
| 383 gexpr_code_init(); | |
| 384 register_usage("gexpr_init"); | |
| 385 } | |
| 386 | |
| 387 | |
| 388 void | |
| 389 emit_init(void) | |
| 390 { | |
| 391 int i; | |
| 392 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 393 free_all_register(); | |
| 394 reg_sp = 0; | |
| 94 | 395 freg_sp = 0; |
| 89 | 396 text_mode(); |
| 397 } | |
| 398 | |
| 399 int | |
| 400 virtual(int real) | |
| 401 { | |
| 402 int real_v,i; | |
| 403 real_v = -1; | |
| 404 for(i=0;i<MAX_REGISTER;i++) { | |
| 405 if (rname[i]==real) { | |
| 406 real_v=i; | |
| 407 break; | |
| 408 } | |
| 409 } | |
| 410 return real_v; | |
| 411 } | |
| 412 | |
| 413 int | |
| 414 pop_register(void) | |
| 415 { /* レジスタから値を取り出す */ | |
| 416 return reg_stack[--reg_sp]; | |
| 417 } | |
| 418 | |
| 419 void | |
| 420 emit_pop_free(int xreg) | |
| 421 { | |
| 159 | 422 if (xreg==dreg||xreg==creg) { |
| 89 | 423 regv[dreg]=0; |
| 98 | 424 } else if (xreg>=0) { |
| 89 | 425 free_register(xreg); |
| 426 } | |
| 427 } | |
| 428 | |
| 429 | |
| 61 | 430 int |
| 105 | 431 get_register_var(NMTBL *nptr) |
| 61 | 432 { |
| 433 int i; | |
| 434 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 435 if (! regs[i]) { /* 使われていないなら */ | |
| 436 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 437 regv[i]=0; | |
| 105 | 438 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 439 } |
| 440 } | |
| 104 | 441 return list2(LVAR,new_lvar(size_of_int)); |
| 442 } | |
| 443 | |
| 444 int | |
| 138 | 445 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 446 { |
| 138 | 447 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 448 } |
| 449 | |
| 61 | 450 void |
| 451 use_register(int virt, int real, int move) | |
| 452 { | |
| 453 int real_v; | |
| 454 char *move_op; | |
| 455 if (rname[virt]==real) | |
| 456 return; | |
| 457 real_v = virtual(real); | |
| 458 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 459 if (move || (regv[real_v])) { | |
| 460 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 461 } | |
| 462 rname[real_v] = rname[virt]; | |
| 463 rname[virt] = real; | |
| 464 } | |
| 465 | |
| 466 void | |
| 467 use_pointer(int virt, int move) | |
| 468 { | |
| 469 int i; | |
| 470 if (rname[virt]>=POINTER_REG) | |
| 471 return; | |
| 472 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 473 if (!regs[virtual(i)]) { | |
| 474 use_register(virt,i,move); | |
| 475 return; | |
| 476 } | |
| 477 } | |
| 478 /* we prefer EBX */ | |
| 479 use_register(virt,REG_EBX,move); | |
| 480 } | |
| 481 | |
| 482 void | |
| 483 use_data_reg(int virt, int move) | |
| 484 { | |
| 485 int i; | |
| 486 if (rname[virt]<MAX_DATA_REG) | |
| 487 return; | |
| 488 for(i=0;i<MAX_DATA_REG;i++) { | |
| 489 if (!regs[virtual(i)]) { | |
| 490 use_register(virt,i,move); | |
| 491 return; | |
| 492 } | |
| 493 } | |
| 494 /* we prefer EBX */ | |
| 495 use_register(virt,REG_EBX,move); | |
| 496 } | |
| 497 | |
| 498 | |
| 499 void | |
| 107 | 500 emit_push() |
| 61 | 501 { |
| 502 int new_reg; | |
| 503 new_reg = get_register(); | |
| 159 | 504 if (new_reg==creg) error(-1); |
| 61 | 505 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 506 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 507 reg_stack[reg_sp++] = -1; |
| 508 printf("\tpushl %s\n",register_name(creg,0)); | |
| 509 /* creg is used soon, don't regv[creg]=0 */ | |
| 510 } else { | |
| 511 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 512 creg = new_reg; | |
| 513 regv[creg]=1; | |
| 514 } | |
| 515 } | |
| 516 | |
| 517 int | |
| 518 emit_pop(int type) | |
| 519 { | |
| 520 int xreg; | |
| 521 if ((xreg=pop_register())==-1) { | |
| 522 if (type==POINTER_REG) | |
| 523 use_pointer(dreg,0); | |
| 524 else if (type==DATA_REG) | |
| 525 use_data_reg(dreg,0); | |
| 526 if (regv[dreg]) { | |
| 527 printf("# emit_pop dreg conflict\n"); | |
| 94 | 528 error(-1); |
| 61 | 529 } |
| 530 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 531 regv[dreg]=1; |
| 532 return dreg; | |
| 533 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 534 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 535 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 536 regv[dreg]=1; |
| 537 return dreg; | |
| 538 } | |
| 61 | 539 return xreg; |
| 540 } | |
| 541 | |
| 92 | 542 void |
| 543 code_label(int labelno) | |
| 544 { | |
| 545 printf("_%d:\n",labelno); | |
| 546 } | |
| 61 | 547 |
| 548 void | |
| 107 | 549 code_gvar(int e1,int creg) { |
| 109 | 550 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 551 regv[creg]=1; |
| 61 | 552 } |
| 553 | |
| 554 | |
| 555 void | |
| 107 | 556 code_rgvar(int e1,int creg) { |
| 109 | 557 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 558 regv[creg]=1; |
| 61 | 559 } |
| 166 | 560 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 561 void |
| 165 | 562 code_crgvar(int e1,int creg,int sign,int sz){ |
| 563 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 564 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 565 regv[creg]=1; |
| 61 | 566 } |
| 567 | |
| 568 | |
| 569 void | |
| 107 | 570 code_lvar(int e2,int creg) { |
| 119 | 571 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 572 regv[creg]=1; |
| 61 | 573 } |
| 574 | |
| 575 | |
| 576 void | |
| 107 | 577 code_register(int e2,int creg) { |
| 61 | 578 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 579 regv[creg]=1; |
| 61 | 580 } |
| 581 | |
| 582 | |
| 583 void | |
| 94 | 584 code_rlvar(int e2,int reg) { |
| 119 | 585 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 586 regv[creg]=1; |
| 61 | 587 } |
| 588 | |
| 589 | |
| 590 void | |
| 165 | 591 code_crlvar(int e2,int reg,int sign,int sz) { |
| 592 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 593 regv[creg]=1; |
| 61 | 594 } |
| 595 | |
| 596 | |
| 597 void | |
| 109 | 598 code_fname(NMTBL *n,int creg) { |
| 599 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 600 regv[creg]=1; |
| 61 | 601 } |
| 602 | |
| 603 | |
| 604 void | |
| 107 | 605 code_const(int e2,int creg) { |
| 61 | 606 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 607 regv[creg]=1; |
| 61 | 608 } |
| 609 | |
| 610 | |
| 611 void | |
| 107 | 612 code_neg(int creg) { |
| 61 | 613 printf("\tnegl %s\n", register_name(creg,0)); |
| 614 } | |
| 615 | |
| 616 | |
| 617 void | |
| 107 | 618 code_not(int creg) { |
| 61 | 619 printf("\tnotl %s\n", register_name(creg,0)); |
| 620 } | |
| 621 | |
| 622 | |
| 623 void | |
| 107 | 624 code_lnot(int creg) { |
| 61 | 625 char *xrn; |
| 626 use_data_reg(creg,1); | |
| 627 xrn = register_name(creg,1); | |
| 628 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 629 printf("\tsete %s\n", xrn); | |
| 630 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 631 } | |
| 632 | |
| 633 void | |
| 168 | 634 code_preinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 635 char *xrn; |
| 636 if (car(e2)==REGISTER) { | |
| 168 | 637 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 638 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 639 regv[reg]=1; | |
| 61 | 640 return; |
| 641 } | |
| 642 g_expr(e2); | |
| 643 xrn = register_name(creg,0); | |
| 168 | 644 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 645 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); | |
| 61 | 646 } |
| 647 | |
| 648 | |
| 649 void | |
| 168 | 650 code_postinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 651 char *xrn; |
| 652 if (car(e2)==REGISTER) { | |
| 107 | 653 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 168 | 654 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 655 regv[reg]=1; |
| 61 | 656 return; |
| 657 } | |
| 658 g_expr(e2); | |
| 659 emit_push(); | |
| 660 xrn = register_name((e2=emit_pop(0)),0); | |
| 165 | 661 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 168 | 662 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 61 | 663 emit_pop_free(e2); |
| 664 } | |
| 665 | |
| 666 | |
| 667 | |
| 668 void | |
| 107 | 669 code_return(int creg) { |
| 61 | 670 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 671 regv[creg]=1; |
| 61 | 672 } |
| 673 | |
| 674 | |
| 675 void | |
| 107 | 676 code_environment(int creg) { |
| 61 | 677 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 678 regv[creg]=1; |
| 61 | 679 } |
| 680 | |
| 681 | |
| 682 void | |
| 116 | 683 code_bool(int e1) { |
| 61 | 684 char *xrn; |
| 685 int e2,e3; | |
| 686 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 687 xrn = register_name(creg,0); | |
| 688 printf("\txorl %s,%s\n",xrn,xrn); | |
| 689 jmp(e3=fwdlabel()); | |
| 690 fwddef(e2); | |
| 691 printf("\tmovl $1,%s\n",xrn); | |
| 692 fwddef(e3); | |
| 107 | 693 regv[creg]=1; |
| 61 | 694 } |
| 695 | |
| 696 char * | |
| 697 code_gt(int cond) { | |
| 698 return (cond?"g":"le"); | |
| 699 } | |
| 700 | |
| 701 char * | |
| 702 code_ugt(int cond) { | |
| 703 return (cond?"a":"be"); | |
| 704 } | |
| 705 | |
| 706 char * | |
| 707 code_ge(int cond) { | |
| 708 return (cond?"ge":"l"); | |
| 709 } | |
| 710 | |
| 711 char * | |
| 712 code_uge(int cond) { | |
| 713 return (cond?"ae":"b"); | |
| 714 } | |
| 715 | |
| 716 char * | |
| 717 code_eq(int cond) { | |
| 718 return (cond?"e":"ne"); | |
| 719 } | |
| 720 | |
| 721 void | |
| 167 | 722 code_cmp_crgvar(int e1,int sz) { |
| 723 if (sz==1) | |
| 724 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 725 else if (sz==size_of_short) | |
| 726 printf("\tcmpw $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 61 | 727 } |
| 728 | |
| 729 | |
| 730 void | |
| 167 | 731 code_cmp_crlvar(int e1,int sz) { |
| 732 if (sz==1) | |
| 733 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); | |
| 734 else if (sz==size_of_short) | |
| 735 printf("\tcmpw $0,%d(%%ebp)\n",lvar(e1)); | |
| 61 | 736 } |
| 737 | |
| 738 | |
| 739 void | |
| 740 code_cmp_rgvar(int e1) { | |
| 109 | 741 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 742 } |
| 743 | |
| 744 | |
| 745 void | |
| 746 code_cmp_rlvar(int e1) { | |
| 119 | 747 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 748 } |
| 749 | |
| 750 | |
| 751 void | |
| 752 code_cmp_register(int e2) { | |
| 753 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 754 } | |
| 755 | |
| 756 | |
| 757 void | |
| 758 ascii(char *s) | |
| 759 { | |
| 760 printf("\t.string \""); | |
| 761 while(*s) { | |
| 762 if (*s=='\n') | |
| 763 printf("%cn",92); | |
| 764 else if (*s<' ') | |
| 765 printf("%c%03o",92,*s); | |
| 766 else if (*s==34) | |
| 767 printf("%c%c",92,34); | |
| 768 else | |
| 769 printf("%c",*s); | |
| 770 s++; | |
| 771 } | |
| 772 printf("%c\n",34); | |
| 773 } | |
| 774 | |
| 775 void | |
| 107 | 776 code_string(int e1,int creg) |
| 61 | 777 { |
| 778 char *s; | |
| 779 int i,lb; | |
| 780 | |
| 781 if (0) { | |
| 782 s=(char *)cadr(e1); | |
| 783 lb=fwdlabel(); | |
| 784 printf("\tjmp _%d\n",lb); | |
| 785 i=backdef(); | |
| 786 ascii(s); | |
| 787 printf("\t.align 2\n"); | |
| 788 fwddef(lb); | |
| 789 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 790 } else { | |
| 791 s=(char *)cadr(e1); | |
| 792 printf(".section\t.rodata\n"); | |
| 793 lb=fwdlabel(); | |
| 794 printf("_%d:\n",lb); | |
| 795 ascii(s); | |
| 796 if (output_mode==TEXT_EMIT_MODE) { | |
| 797 printf(".text\n"); | |
| 798 } else { | |
| 799 text_mode(); | |
| 800 } | |
| 801 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 #define MAX_COPY_LEN 20 | |
| 806 | |
| 807 void | |
| 808 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 809 { | |
| 810 int fix = 0; | |
| 811 /* length <0 means upward direction copy */ | |
| 812 switch (length) { | |
| 813 case 0: break; | |
| 814 case 1: case -1: | |
| 815 printf("\tmovb %d(%s),%s\n",offset, | |
| 816 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 817 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 818 register_name(to,0)); | |
| 819 break; | |
| 820 case 2: case -2: | |
| 821 printf("\tmovw %d(%s),%s\n",offset, | |
| 822 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 823 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 824 register_name(to,0)); | |
| 825 break; | |
| 826 case 4: case -4: | |
| 827 printf("\tmovl %d(%s),%s\n",offset, | |
| 828 register_name(from,0), register_name(dreg,0)); | |
| 829 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 830 register_name(to,0)); | |
| 831 break; | |
| 832 default: | |
| 833 if (-MAX_COPY_LEN<length && length <0) { | |
| 834 for(;length<=4;length+=4,offset-=4) | |
| 835 emit_copy(from,to,4,offset,0,det); | |
| 836 for(;length<=2;length+=2,offset-=2) | |
| 837 emit_copy(from,to,2,offset,0,det); | |
| 838 if(length>0) | |
| 839 emit_copy(from,to,length,offset,0,det); | |
| 840 break; | |
| 841 } else if (length <=MAX_COPY_LEN) { | |
| 842 for(;length>=4;length-=4,offset+=4) | |
| 843 emit_copy(from,to,4,offset,0,det); | |
| 844 for(;length>=2;length-=2,offset+=2) | |
| 845 emit_copy(from,to,2,offset,0,det); | |
| 846 if(length>0) | |
| 847 emit_copy(from,to,length,offset,0,det); | |
| 848 break; | |
| 849 } | |
| 850 if (det) { | |
| 851 /* | |
| 852 call bcopy | |
| 853 g_expr(list3(FUNCTION,,); | |
| 854 break; | |
| 855 */ | |
| 856 } | |
| 857 use_register(from,REG_ESI,1); | |
| 858 use_register(to, REG_EDI,1); | |
| 859 use_register(dreg,REG_ECX,0); | |
| 860 if (length<0) { | |
| 861 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 862 printf("\taddl $%d,%%esi\n",-length); | |
| 863 printf("\taddl $%d,%%edi\n",-length); | |
| 864 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 865 if(length%4) { | |
| 866 emit_copy(from,to,length,offset+length/4,0,det); | |
| 867 } | |
| 868 } else { | |
| 869 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 870 fix = (length/4)*4; | |
| 871 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 872 if(length%4) { | |
| 873 emit_copy(from,to,length,offset+length/4,0,det); | |
| 874 } | |
| 875 } | |
| 876 } | |
| 877 if (value) { | |
| 878 /* creg must point top of the destination data */ | |
| 879 /* this code is necessary for the value of assignment or function call */ | |
| 880 /* otherwise we don't need this */ | |
| 881 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 882 if(creg!=to) { | |
| 883 if (to==dreg) | |
| 884 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 885 else { | |
| 886 free_register(creg); creg=to; | |
| 887 } | |
| 888 } | |
| 889 } | |
| 890 regv[from]=regv[to]=regv[dreg]=0; | |
| 891 regv[creg]=1; | |
| 892 } | |
| 893 | |
| 894 int | |
| 895 struct_push(int e4,int t) | |
| 896 { | |
| 81 | 897 int length,xreg,save,lreg,count; |
| 61 | 898 g_expr(e4); |
| 899 length=size(t); | |
| 900 if(length%size_of_int) { | |
| 901 length += size_of_int - (length%size_of_int); | |
| 902 } | |
| 81 | 903 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 904 if (length==0) return count; | |
| 905 else { | |
| 906 printf("\tpushl %d(%s)\n", | |
| 907 length-size_of_int,register_name(creg,0)); | |
| 908 } | |
| 61 | 909 } |
| 910 printf("\tsubl $%d,%%esp\n",length); | |
| 911 if (register_full()) { | |
| 912 save = 1; | |
| 913 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 914 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 915 xreg = lreg; regv[xreg]=0; | |
| 916 } else { | |
| 917 save=0; | |
| 918 xreg = get_register(); | |
| 919 } | |
| 920 if (save) | |
| 921 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 922 else | |
| 923 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 924 regv[xreg]=1; | |
| 925 /* downward direction copy */ | |
| 926 emit_copy(creg,xreg,length,0,0,1); | |
| 927 /* we have value in creg, it may be changed */ | |
| 928 if (save) { | |
| 929 if(creg==xreg) { | |
| 930 creg = get_register(); /* creg is freed in emit_copy */ | |
| 931 } | |
| 932 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 933 regv[xreg]=1; | |
| 934 } else | |
| 935 free_register(xreg); | |
| 936 return length/size_of_int; | |
| 937 } | |
| 938 | |
| 94 | 939 int |
| 61 | 940 function(int e1) |
| 941 { | |
| 127 | 942 int e2,e3,e4,nargs,t,ret_type; |
| 943 NMTBL *n=0; | |
| 61 | 944 int save,saved; |
|
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945 ret_type = cadr(cadddr(e1)); |
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946 if (ret_type==CHAR) ret_type=INT; |
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|
947 |
| 94 | 948 #ifdef SAVE_STACKS |
| 949 code_save_stacks(); | |
| 950 #endif | |
| 137 | 951 if (free_register_count(0)<1) { |
| 61 | 952 for(save = 0;save==dreg||save==creg;save++); |
| 953 printf("\tpushl %s\n",register_name(save,0)); | |
| 954 saved = 1; | |
| 955 } else { | |
| 956 save = get_register(); | |
| 957 saved = 0; | |
| 958 } | |
| 959 regv[save]=0; | |
| 960 e2 = cadr(e1); | |
| 961 nargs = 0; | |
| 962 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 963 t=caddr(e3); | |
| 127 | 964 e4 = car(e3); |
| 61 | 965 if(scalar(t)) { |
| 966 g_expr(e4); | |
| 967 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 968 } else if (t==DOUBLE) { |
| 969 g_expr(e4); | |
| 970 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 971 nargs += size_of_double/size_of_int; |
| 83 | 972 fregv[freg]=0; |
| 82 | 973 continue; |
| 974 } else if (t==FLOAT) { | |
| 975 g_expr(e4); | |
| 976 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 977 nargs += size_of_float/size_of_int; |
| 83 | 978 fregv[freg]=0; |
| 82 | 979 continue; |
| 61 | 980 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 981 nargs += struct_push(e4,t); | |
| 982 continue; | |
| 983 } else { | |
| 984 error(TYERR); | |
| 985 } | |
| 986 ++nargs; | |
| 987 } | |
| 988 if (car(e2) == FNAME) { | |
| 989 n=(NMTBL *)cadr(e2); | |
| 78 | 990 regv[creg]=0; |
| 991 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 992 } else { |
| 993 g_expr(e2); | |
| 78 | 994 regv[creg]=1; |
| 995 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 996 } |
| 997 | |
| 998 /* we don't have to save creg nor dreg */ | |
| 999 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1000 regv[dreg]= regv[save]= 0; |
| 61 | 1001 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1002 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1003 regs[creg]=1; regs[dreg]=1; | |
| 1004 | |
| 1005 if (car(e2) == FNAME) { | |
| 1006 printf("\tcall\t%s\n",n->nm); | |
| 1007 } else { | |
| 1008 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1009 } | |
| 1010 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1011 if (saved) { | |
| 1012 printf("\tpopl %s\n",register_name(save,0)); | |
| 1013 } else { | |
| 1014 free_register(save); | |
| 1015 } | |
| 1016 regv[save]=0; | |
| 105 | 1017 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1018 fregv[freg]=1; regv[creg]=0; |
| 105 | 1019 } else if (ret_type==VOID) { |
| 94 | 1020 fregv[freg]=0; regv[creg]=0; |
| 1021 } else { | |
| 1022 fregv[freg]=0; regv[creg]=1; | |
| 1023 } | |
| 105 | 1024 return ret_type; |
| 61 | 1025 } |
| 1026 | |
| 1027 void | |
| 1028 code_frame_pointer(int e3) { | |
| 1029 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1030 } | |
| 1031 | |
| 1032 | |
| 1033 void | |
| 62 | 1034 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1035 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1036 } | |
| 1037 | |
| 1038 | |
| 1039 void | |
| 1040 code_jmp(char *s) { | |
| 1041 printf("\tjmp %s\n",s); | |
| 1042 } | |
| 1043 | |
| 1044 | |
| 1045 void | |
| 1046 code_indirect_jmp(int e2) { | |
| 1047 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1048 } | |
| 1049 | |
| 94 | 1050 int |
| 61 | 1051 rindirect(int e1) /* *(p +5 ) */ |
| 1052 { | |
| 1053 char *op; | |
| 94 | 1054 int e2,e3,byte,t; |
| 61 | 1055 e3 = cadr(e2 = cadr(e1)); |
| 1056 g_expr(e2); | |
| 82 | 1057 switch (car(e1)) { |
| 1058 case FRINDIRECT: case DRINDIRECT: | |
| 163 | 1059 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); |
| 1060 t=DOUBLE; | |
| 1061 return t; | |
| 1062 break; | |
| 1063 case CRINDIRECT: | |
| 1064 byte = 1; op="movsbl";t=CHAR; | |
| 166 | 1065 break; |
| 163 | 1066 case CURINDIRECT: |
| 166 | 1067 byte = 1; op="movzbl";t=UCHAR; |
| 1068 break; | |
| 165 | 1069 case SRINDIRECT: |
| 1070 byte = 1; op="movswl";t=SHORT; | |
| 166 | 1071 break; |
| 165 | 1072 case SURINDIRECT: |
| 166 | 1073 byte = 1; op="movzwl";t=USHORT; |
| 1074 break; | |
| 163 | 1075 case RINDIRECT: default: |
| 1076 byte = 0; op="movl";t=INT; | |
| 1077 } | |
| 61 | 1078 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1079 return t; |
| 61 | 1080 } |
| 1081 | |
| 1082 char * | |
| 1083 move(int byte) | |
| 1084 { | |
| 165 | 1085 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1086 } |
| 1087 | |
| 1088 void | |
| 103 | 1089 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1090 if (byte) use_data_reg(creg,1); |
| 109 | 1091 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1092 } |
| 1093 | |
| 1094 void | |
| 103 | 1095 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1096 if (byte) use_data_reg(creg,1); |
| 119 | 1097 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1098 } |
| 1099 | |
| 1100 void | |
| 111 | 1101 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1102 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1103 } | |
| 1104 | |
| 1105 void | |
| 118 | 1106 code_assign(int e2,int byte,int creg) { |
| 95 | 1107 if (byte) use_data_reg(creg,1); |
| 61 | 1108 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1109 regv[creg]=1; |
| 61 | 1110 } |
| 1111 | |
| 1112 void | |
| 1113 code_register_assop(int e2,int op,int byte) { | |
| 1114 int reg; | |
| 1115 int xreg = creg; | |
| 1116 creg = reg = e2; | |
| 1117 tosop(op,xreg); | |
| 1118 creg = xreg; | |
| 1119 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1120 regs[creg]=regv[creg]=1; |
| 61 | 1121 } |
| 1122 | |
| 1123 | |
| 1124 void | |
| 163 | 1125 code_assop(int op,int byte,int sign) { |
| 61 | 1126 char *xrn; |
| 1127 int xreg; | |
| 1128 int edx = edx_setup(); | |
| 1129 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1130 regv[xreg]=regs[xreg]=1; | |
| 1131 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1132 regv[edx]=1; | |
| 163 | 1133 ld_indexx(byte,0,edx,sign); |
| 61 | 1134 tosop(op,xreg); |
| 165 | 1135 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1136 edx_cleanup(); |
| 1137 emit_pop_free(xreg); | |
| 144 | 1138 regv[creg]=1; |
| 61 | 1139 } |
| 1140 | |
| 1141 | |
| 1142 void | |
| 1143 tosop(int op,int oreg) | |
| 1144 { | |
| 1145 int dx; | |
| 1146 char *orn,*crn; | |
| 1147 | |
| 1148 switch(op) { | |
| 1149 case LSHIFT: | |
| 1150 case ULSHIFT: | |
| 1151 shift("sall",oreg); | |
| 144 | 1152 regv[creg]=1; |
| 61 | 1153 return; |
| 1154 case RSHIFT: | |
| 1155 shift("sarl",oreg); | |
| 144 | 1156 regv[creg]=1; |
| 61 | 1157 return; |
| 1158 case URSHIFT: | |
| 1159 shift("shrl",oreg); | |
| 144 | 1160 regv[creg]=1; |
| 61 | 1161 return; |
| 1162 } | |
| 1163 if(oreg==-1) { | |
| 1164 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1165 oreg = dreg; | |
| 1166 regv[dreg]=1; | |
| 94 | 1167 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1168 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1169 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1170 oreg = dreg; |
| 1171 regv[dreg]=1; | |
| 61 | 1172 } |
| 1173 regv[oreg]=1; regs[oreg]=1; | |
| 1174 orn = register_name(oreg,0); | |
| 1175 crn = register_name(creg,0); | |
| 1176 switch(op) { | |
| 1177 case ADD: | |
| 1178 printf("\taddl %s,%s\n",orn,crn); | |
| 1179 break; | |
| 89 | 1180 case SUB: case CMP: |
| 61 | 1181 printf("\tsubl %s,%s\n",orn,crn); |
| 1182 break; | |
| 1183 case BAND: | |
| 1184 printf("\tandl %s,%s\n",orn,crn); | |
| 1185 break; | |
| 1186 case EOR: | |
| 1187 printf("\txorl %s,%s\n",orn,crn); | |
| 1188 break; | |
| 1189 case BOR: | |
| 1190 printf("\torl %s,%s\n",orn,crn); | |
| 1191 break; | |
| 1192 case MUL: | |
| 1193 case UMUL: | |
| 1194 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1195 break; | |
| 1196 case DIV: | |
| 1197 case UDIV: | |
| 1198 use_register(creg,REG_EAX,1); | |
| 1199 edx_setup(); | |
| 1200 orn = register_name(oreg,0); | |
| 1201 if (op==DIV) | |
| 127 | 1202 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1203 else |
| 127 | 1204 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1205 edx_cleanup(); |
| 1206 break; | |
| 1207 case MOD: | |
| 1208 case UMOD: | |
| 1209 use_register(creg,REG_EAX,1); | |
| 1210 edx_setup(); | |
| 1211 orn = register_name(oreg,0); | |
| 1212 if (op==DIV) | |
| 127 | 1213 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1214 else |
| 127 | 1215 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1216 dx = virtual(REG_EDX); |
| 1217 if (dx!=creg) { | |
| 1218 rname[dx]=rname[creg]; | |
| 1219 rname[creg]=REG_EDX; | |
| 1220 } | |
| 1221 edx_cleanup(); | |
| 1222 break; | |
| 1223 } | |
| 159 | 1224 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1225 free_register(oreg); |
| 94 | 1226 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1227 regv[creg]=1; |
| 61 | 1228 } |
| 1229 | |
| 1230 static int edx_stack=0; | |
| 1231 | |
| 1232 int | |
| 1233 edx_setup() | |
| 1234 { | |
| 1235 int edx_save; | |
| 1236 /* make real EDX register empty */ | |
| 137 | 1237 if (free_register_count(0)<1) { |
| 61 | 1238 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1239 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1240 edx_stack = list3(edx_save,edx_stack,0); | |
| 1241 } else { | |
| 1242 edx_save = get_register(); | |
| 1243 edx_stack = list3(edx_save,edx_stack,1); | |
| 1244 } | |
| 1245 regv[edx_save]=0; | |
| 1246 use_register(edx_save,REG_EDX,0); | |
| 1247 return edx_save; | |
| 1248 } | |
| 1249 | |
| 1250 | |
| 1251 void | |
| 1252 edx_cleanup() | |
| 1253 { | |
| 1254 if (caddr(edx_stack)==0) { | |
| 1255 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1256 } else | |
| 1257 free_register(car(edx_stack)); | |
| 1258 edx_stack = cadr(edx_stack); | |
| 1259 } | |
| 1260 | |
| 1261 void | |
| 1262 shift(char *op, int reg) | |
| 1263 { | |
| 1264 if (reg>=0) { | |
| 1265 use_register(reg,REG_ECX,1); | |
| 103 | 1266 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1267 use_register(dreg,REG_ECX,0); | |
| 119 | 1268 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1269 reg = dreg; |
| 1270 regv[dreg]=0; | |
| 61 | 1271 } else { |
| 1272 use_register(dreg,REG_ECX,0); | |
| 1273 printf("\tpopl %%ecx\n"); | |
| 103 | 1274 regv[dreg]=0; |
| 61 | 1275 } |
| 1276 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1277 } | |
| 1278 | |
| 1279 void | |
| 163 | 1280 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1281 { |
| 1282 char *op; | |
| 1283 | |
| 166 | 1284 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1285 if (n) |
| 95 | 1286 printf("\t%s %d(%s),%s\n",op,n, |
| 1287 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1288 else |
| 95 | 1289 printf("\t%s (%s),%s\n",op, |
| 1290 register_name(xreg,0),register_name(creg,byte)); | |
| 1291 } | |
| 1292 | |
| 1293 int | |
| 1294 code_csvalue() | |
| 1295 { | |
| 123 | 1296 return rname[creg]; /* for switch value */ |
| 61 | 1297 } |
| 1298 | |
| 1299 void | |
| 95 | 1300 code_cmpdimm(int e, int csreg) |
| 61 | 1301 { |
| 1302 /* used in dosiwtch() */ | |
| 66 | 1303 if(chk) return; |
| 123 | 1304 use_register(creg,csreg,0); |
| 61 | 1305 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1306 } | |
| 1307 | |
| 1308 void | |
| 66 | 1309 code_opening(char *filename) |
| 61 | 1310 { |
| 1311 printf("\t.file \"%s\"\n",filename); | |
| 1312 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1313 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1314 printf(".text\n"); |
| 1315 } | |
| 1316 | |
| 1317 void | |
| 66 | 1318 code_closing() |
| 61 | 1319 { |
| 78 | 1320 global_table(); |
| 61 | 1321 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1322 } | |
| 1323 | |
| 1324 void | |
| 89 | 1325 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1326 { |
| 89 | 1327 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1328 printf("\tj%s\t_%d\n",s,l1); |
| 1329 } | |
| 1330 | |
| 82 | 1331 |
| 1332 void | |
| 61 | 1333 jcond(int l, char cond) |
| 1334 { | |
| 66 | 1335 if (chk) return; |
| 61 | 1336 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1337 } | |
| 1338 | |
| 1339 void | |
| 1340 jmp(int l) | |
| 1341 { | |
| 1342 control=0; | |
| 66 | 1343 if (chk) return; |
| 61 | 1344 printf("\tjmp\t_%d\n",l); |
| 1345 /* align? */ | |
| 1346 /* | |
| 1347 this is not allowed because of ? operator | |
| 1348 regv[creg]=regv[dreg]=0; | |
| 1349 use_register(creg,REG_EAX,0); | |
| 1350 use_register(dreg,REG_EBX,0); | |
| 1351 */ | |
| 1352 } | |
| 1353 | |
| 1354 void | |
| 1355 gen_comment(char *s) | |
| 1356 { | |
| 66 | 1357 if (chk) return; |
| 1358 printf("## %s",s); | |
| 61 | 1359 } |
| 1360 | |
| 1361 | |
| 1362 void | |
| 1363 code_enter(char *name) | |
| 1364 { | |
| 1365 printf("\t.align 4\n"); | |
| 1366 if (stmode!=STATIC) | |
| 1367 printf(".globl %s\n",name); | |
| 1368 printf("\t.type\t%s,@function\n",name); | |
| 1369 printf("%s:\n",name); | |
| 1370 } | |
| 1371 | |
| 77 | 1372 |
| 61 | 1373 void |
| 1374 code_enter1(int args) | |
| 1375 { | |
| 1376 code_disp_label=fwdlabel(); | |
| 1377 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1378 | |
| 1379 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1380 } | |
| 1381 | |
| 1382 void | |
| 1383 code_leave(char *name) | |
| 1384 { | |
| 63 | 1385 disp&= -size_of_int; |
| 61 | 1386 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1387 printf("_%d:\n",labelno); | |
| 1388 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1389 local_table(); | |
| 1390 labelno++; | |
| 1391 free_all_register(); | |
| 1392 } | |
| 1393 | |
| 1394 void | |
| 1395 enter(char *name) | |
| 1396 { | |
| 1397 printf("\t.align 2\n"); | |
| 1398 if (stmode!=STATIC) | |
| 1399 printf(".globl %s\n",name); | |
| 1400 printf("%s:\n",name); | |
| 1401 printf("\t.type\t%s,@function\n",name); | |
| 1402 printf("\tpushl %%ebp\n"); | |
| 1403 printf("\tmovl %%esp,%%ebp\n"); | |
| 1404 printf("\tpushl %%ebx\n"); | |
| 1405 printf("\tpushl %%esi\n"); | |
| 1406 printf("\tpushl %%edi\n"); | |
| 1407 } | |
| 1408 | |
| 1409 void | |
| 1410 enter1() | |
| 1411 { | |
| 182 | 1412 text_mode(); |
| 61 | 1413 func_disp_label=fwdlabel(); |
| 1414 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1415 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1416 } | |
| 1417 | |
| 1418 void | |
| 1419 leave(int control, char *name) | |
| 1420 { | |
| 128 | 1421 int sz; |
| 1422 | |
| 1423 disp &= -size_of_int; | |
| 61 | 1424 if (control) |
| 108 | 1425 code_set_return_register(1); |
| 61 | 1426 if (retcont) { |
| 1427 if (control) | |
| 1428 jmp(retlabel); | |
| 1429 fwddef(retcont); | |
| 128 | 1430 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1431 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1432 } else if (cadr(fnptr->ty)>0&&( | |
| 1433 car(cadr(fnptr->ty))==STRUCT || | |
| 1434 car(cadr(fnptr->ty))==UNION)) { | |
| 1435 sz = size(cadr(fnptr->ty)); | |
| 1436 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1437 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1438 register_name(creg,0)); | |
| 1439 emit_copy(dreg,creg,sz,0,1,1); | |
| 1440 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1441 use_register(creg,REG_EAX,0); | |
| 1442 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1443 } | |
| 61 | 1444 } |
| 1445 fwddef(retlabel); | |
| 63 | 1446 |
| 61 | 1447 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1448 printf("\tpopl %%edi\n"); | |
| 1449 printf("\tpopl %%esi\n"); | |
| 1450 printf("\tpopl %%ebx\n"); | |
| 1451 printf("\tleave\n"); | |
| 1452 printf("\tret\n"); | |
| 1453 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1454 printf("_%d:\n",labelno); | |
| 1455 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1456 local_table(); | |
| 1457 labelno++; | |
| 1458 free_all_register(); | |
| 1459 } | |
| 1460 | |
| 1461 | |
| 1462 void | |
| 108 | 1463 code_set_fixed_creg(int mode,int type) { |
| 1464 if (type==FLOAT||type==DOUBLE) { | |
| 1465 } else | |
| 1466 use_register(creg,REG_EAX,mode); | |
| 61 | 1467 } |
| 1468 | |
| 1469 void | |
| 107 | 1470 code_set_return_register(int mode) { |
| 1471 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1472 } else { | |
| 1473 use_register(creg,REG_EAX,mode); | |
| 1474 } | |
| 1475 } | |
| 1476 | |
| 1477 void | |
| 61 | 1478 gen_gdecl(char *n, int gpc) |
| 1479 { | |
| 1480 /* | |
| 1481 if (stmode!=STATIC) | |
| 1482 printf(".globl %s\n",n); | |
| 1483 */ | |
| 1484 } | |
| 1485 | |
| 1486 void | |
| 1487 align(int t) | |
| 1488 { | |
| 1489 if (t!=CHAR) { | |
| 1490 if (data_alignment & 1) | |
| 1491 printf("\t.align 2\n"); | |
| 1492 data_alignment = 0; | |
| 1493 } | |
| 1494 } | |
| 1495 | |
| 1496 void | |
| 1497 emit_data(int e, int t, NMTBL *n) | |
| 1498 { | |
| 1499 int l; | |
| 82 | 1500 double d; |
| 1501 float f; | |
| 61 | 1502 char *name; |
| 1503 name = n->nm; | |
| 156 | 1504 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1505 error(-1); return; |
| 1506 } | |
| 66 | 1507 if (chk) return; |
| 61 | 1508 if (n->dsp != -1) { |
| 1509 n->dsp = -1; /* initiallized flag */ | |
| 1510 printf(".globl\t%s\n",name); | |
| 1511 data_mode(name); | |
| 1512 align(t); | |
| 1513 printf("%s:\n",name); | |
| 1514 } else { | |
| 1515 data_mode(0); | |
| 1516 } | |
| 1517 if(car(e)==CONST) { | |
| 168 | 1518 if (t==CHAR||t==UCHAR) { |
| 61 | 1519 printf("\t.byte %d\n",cadr(e)); |
| 1520 if (data_alignment>0) | |
| 1521 data_alignment++; | |
| 1522 gpc += 1; | |
| 168 | 1523 } else if (t==SHORT||t==USHORT) { |
| 1524 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1525 if (data_alignment>0) data_alignment++; |
| 168 | 1526 gpc += size_of_short; |
| 61 | 1527 } else { |
| 1528 printf("\t.long %d\n",cadr(e)); | |
| 1529 gpc += size_of_int; | |
| 1530 } | |
| 82 | 1531 } else if(t==DOUBLE) { |
| 1532 d = dcadr(e); | |
| 1533 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1534 } else if(t==FLOAT) { | |
| 1535 f = dcadr(e); | |
| 1536 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1537 } else if(t!=CHAR) { |
| 1538 gpc += size_of_int; | |
| 1539 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1540 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1541 } else if(car(e)==GVAR) { | |
| 1542 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1543 } else if(car(e)==FNAME) { |
| 1544 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1545 } else if(car(e)==STRING) { | |
| 1546 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1547 l = fwdlabel(); | |
| 1548 printf("\t.long _%d\n",l); | |
| 1549 printf(".section\t.rodata\n"); | |
| 1550 printf("_%d:\n",l); | |
| 1551 output_mode = RODATA_EMIT_MODE; | |
| 1552 } | |
| 1553 ascii((char *)cadr(e)); | |
| 1554 } else error(TYERR); | |
| 168 | 1555 } else error(TYERR); |
| 61 | 1556 } |
| 1557 | |
| 1558 void | |
| 1559 emit_data_closing(NMTBL *n) | |
| 1560 { | |
| 1561 int lb; | |
| 66 | 1562 if (chk) return; |
| 61 | 1563 if (mode==GDECL) { |
| 1564 data_mode(0); | |
| 1565 lb=fwdlabel(); | |
| 1566 printf("_%d:\n",lb); | |
| 1567 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1568 } | |
| 1569 } | |
| 1570 | |
| 1571 void | |
| 1572 global_table(void) | |
| 1573 { | |
| 1574 NMTBL *n; | |
| 1575 int init; | |
| 1576 init=0; | |
| 1577 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1578 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1579 /* n->dsp = -1 means initialized global */ |
| 1580 if (init==0) { | |
| 1581 data_mode(0); | |
| 1582 init=1; | |
| 1583 } | |
| 1584 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1585 } | |
| 1586 } | |
| 1587 } | |
| 1588 | |
| 1589 void | |
| 1590 local_table(void) | |
| 1591 { | |
| 1592 NMTBL *n; | |
| 1593 int init; | |
| 1594 init=0; | |
| 1595 /* static local variables */ | |
| 1596 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1597 if (n->sc == GVAR) { | |
| 1598 if (init==0) { | |
| 1599 data_mode(0); | |
| 1600 init=1; | |
| 1601 } | |
| 156 | 1602 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1603 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1604 } |
| 1605 } | |
| 1606 } | |
| 1607 | |
| 1608 void | |
| 1609 text_mode(void) | |
| 1610 { | |
| 1611 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1612 printf(".text\n"); | |
| 1613 printf("\t.align 2\n"); | |
| 1614 output_mode = TEXT_EMIT_MODE; | |
| 1615 } | |
| 1616 } | |
| 1617 | |
| 1618 void | |
| 1619 data_mode(char *name) | |
| 1620 { | |
| 1621 if (output_mode!=DATA_EMIT_MODE) { | |
| 1622 printf(".data\n"); | |
| 1623 output_mode = DATA_EMIT_MODE; | |
| 1624 } | |
| 1625 if (name) | |
| 1626 printf("\t.type\t%s,@object\n",name); | |
| 1627 } | |
| 1628 | |
| 81 | 1629 /* floating point */ |
| 1630 | |
| 1631 | |
| 82 | 1632 char * |
| 1633 fstore(int d) | |
| 1634 { | |
| 83 | 1635 return use? |
| 1636 (d?"fstl":"fsts"): | |
| 1637 (d?"fstpl":"fstps") | |
| 1638 ; | |
| 1639 } | |
| 1640 | |
| 1641 char * | |
| 1642 fstore_u(int d) | |
| 1643 { | |
| 82 | 1644 return d?"fstpl":"fstps"; |
| 1645 } | |
| 81 | 1646 |
| 82 | 1647 char * |
| 1648 fload(int d) | |
| 1649 { | |
| 1650 return d?"fldl":"flds"; | |
| 1651 } | |
| 81 | 1652 |
| 1653 | |
| 103 | 1654 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1655 { |
| 109 | 1656 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1657 } |
| 1658 | |
| 103 | 1659 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1660 { |
| 119 | 1661 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1662 } |
| 1663 | |
| 138 | 1664 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1665 { |
| 1666 error(-1); | |
| 1667 } | |
| 1668 | |
| 103 | 1669 void code_dassign(int e2,int freg,int d) |
| 82 | 1670 { |
| 1671 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1672 } | |
| 1673 | |
| 1674 static double d0 = 1.0; | |
| 81 | 1675 |
| 82 | 1676 int |
| 1677 code_d1(double d) | |
| 1678 { | |
| 1679 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1680 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1681 } | |
| 1682 | |
| 1683 int | |
| 1684 code_d2(double d) | |
| 1685 { | |
| 1686 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1687 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1688 } | |
| 1689 | |
| 138 | 1690 void code_dconst(int e2,int freg,int d) |
| 82 | 1691 { |
| 1692 int lb; | |
| 138 | 1693 double value = dcadr(e2); |
| 81 | 1694 |
| 138 | 1695 if (value==0.0) { |
| 82 | 1696 printf("\tfldz\n"); return; |
| 1697 } | |
| 138 | 1698 if (value==1.0) { |
| 82 | 1699 printf("\tfld1\n"); return; |
| 1700 } | |
| 1701 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1702 lb=fwdlabel(); | |
| 1703 printf("_%d:\n",lb); | |
| 138 | 1704 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1705 if (output_mode==TEXT_EMIT_MODE) { |
| 1706 printf(".text\n"); | |
| 1707 } else { | |
| 1708 text_mode(); | |
| 1709 } | |
| 1710 printf("\tfldl _%d\n",lb); | |
| 1711 } | |
| 1712 | |
| 138 | 1713 void code_dneg(int freg,int d) |
| 82 | 1714 { |
| 1715 printf("\tfchs\n"); | |
| 1716 } | |
| 81 | 1717 |
| 147 | 1718 void code_d2i(int freg) |
| 82 | 1719 { |
| 1720 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1721 printf("\tfnstcw (%%esp)\n"); | |
| 1722 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1723 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1724 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1725 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1726 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1727 printf("\tfldcw (%%esp)\n"); |
| 82 | 1728 printf("\tpopl %s\n",register_name(creg,0)); |
| 1729 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1730 } | |
| 81 | 1731 |
| 147 | 1732 void code_i2d(int creg) |
| 82 | 1733 { |
| 1734 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1735 printf("\tfildl (%%esp)\n"); | |
| 1736 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1737 } | |
| 1738 | |
| 147 | 1739 void code_d2u(int freg) |
| 85 | 1740 { |
| 86 | 1741 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1742 printf("\tfnstcw (%%esp)\n"); |
| 1743 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1744 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1745 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1746 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1747 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1748 printf("\tfldcw (%%esp)\n"); |
| 86 | 1749 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1750 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1751 } |
| 1752 | |
| 147 | 1753 void code_u2d(int creg) |
| 85 | 1754 { |
| 86 | 1755 printf("\tpushl %s\n",register_name(creg,0)); |
| 1756 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1757 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1758 printf("\tfildll (%%esp)\n"); | |
| 1759 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1760 } |
| 1761 | |
| 133 | 1762 void code_d2f(int freg) { } |
| 1763 void code_f2d(int freg) { } | |
| 147 | 1764 void code_f2i(int freg) { code_d2i(freg); } |
| 1765 void code_f2u(int freg) { code_d2u(freg); } | |
| 1766 void code_i2f(int creg) { code_i2d(creg); } | |
| 1767 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1768 |
| 107 | 1769 void code_drgvar(int e2,int d,int freg) |
| 82 | 1770 { |
| 109 | 1771 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1772 } |
| 81 | 1773 |
| 1774 | |
| 107 | 1775 void code_drlvar(int e2,int d,int freg) |
| 82 | 1776 { |
| 119 | 1777 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1778 } |
| 1779 | |
| 138 | 1780 void code_cmp_drgvar(int e2,int d) |
| 82 | 1781 { |
| 109 | 1782 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1783 } |
| 1784 | |
| 138 | 1785 void code_cmp_drlvar(int e2,int d) |
| 82 | 1786 { |
| 119 | 1787 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1788 } |
| 1789 | |
| 1790 void dtosop(int op,int e1) | |
| 94 | 1791 { |
| 82 | 1792 switch(op) { |
| 133 | 1793 case FADD: |
| 82 | 1794 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1795 case FSUB: |
| 85 | 1796 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1797 case FDIV: |
| 85 | 1798 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1799 case FMUL: |
| 82 | 1800 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1801 case FCMP: |
| 89 | 1802 case DCMP: |
| 82 | 1803 printf("\tfucompp\n"); |
| 1804 printf("\tfnstsw\t%%ax\n"); | |
| 1805 break; | |
| 1806 } | |
| 1807 } | |
| 81 | 1808 |
| 83 | 1809 void |
| 1810 code_dassop(int op,int d) { | |
| 1811 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1812 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1813 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1814 dtosop(op,0); | |
| 1815 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1816 } | |
| 1817 | |
| 1818 void | |
| 107 | 1819 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1820 g_expr(e2); |
| 1821 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1822 printf("\tfld1\n"); | |
| 87 | 1823 if (caddr(e1)>0) |
| 83 | 1824 printf("\tfaddp %%st,%%st(1)\n"); |
| 1825 else | |
| 1826 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1827 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1828 } | |
| 1829 | |
| 1830 void | |
| 107 | 1831 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1832 g_expr(e2); |
| 1833 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1834 if (use) | |
| 86 | 1835 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1836 printf("\tfld1\n"); |
| 87 | 1837 if (caddr(e1)>0) |
| 83 | 1838 printf("\tfaddp %%st,%%st(1)\n"); |
| 1839 else | |
| 1840 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1841 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1842 } |
| 1843 | |
| 84 | 1844 void |
| 1845 drexpr(int e1, int e2,int l1, int op) | |
| 1846 { | |
| 89 | 1847 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1848 switch(op) { |
| 1849 case DOP+GE: | |
| 133 | 1850 case FOP+GE: |
| 84 | 1851 printf("\ttestb\t$5,%%ah\n"); |
| 1852 printf("\tjne\t_%d\n",l1); | |
| 1853 break; | |
| 1854 case DOP+GT: | |
| 133 | 1855 case FOP+GT: |
| 84 | 1856 printf("\ttestb\t$69,%%ah\n"); |
| 1857 printf("\tjne\t_%d\n",l1); | |
| 1858 break; | |
| 1859 case DOP+EQ: | |
| 133 | 1860 case FOP+EQ: |
| 84 | 1861 printf("\tandb\t$69,%%ah\n"); |
| 1862 printf("\txorb\t$64,%%ah\n"); | |
| 1863 printf("\tjne\t_%d\n",l1); | |
| 1864 break; | |
| 1865 case DOP+NEQ: | |
| 133 | 1866 case FOP+NEQ: |
| 84 | 1867 printf("\tandb\t$69,%%ah\n"); |
| 1868 printf("\txorb\t$64,%%ah\n"); | |
| 1869 printf("\tje\t_%d\n",l1); | |
| 1870 break; | |
| 1871 } | |
| 1872 } | |
| 1873 | |
| 94 | 1874 void |
| 138 | 1875 code_dregister(int e2,int freg,int d) |
| 94 | 1876 { |
| 1877 error(-1); | |
| 1878 } | |
| 1879 | |
| 138 | 1880 void |
| 1881 code_cmp_dregister(int e2,int d) | |
| 94 | 1882 { |
| 1883 error(-1); | |
| 82 | 1884 } |
| 81 | 1885 |
| 97 | 1886 int pop_fregister() |
| 82 | 1887 { |
| 94 | 1888 if (freg_sp<0) { error(-1); return -1;} |
| 1889 printf("# fpop: %d\n",freg_sp-1); | |
| 1890 return freg_stack[--freg_sp]; | |
| 82 | 1891 } |
| 81 | 1892 |
| 94 | 1893 int |
| 138 | 1894 emit_dpop(int d) |
| 94 | 1895 { |
| 1896 int xreg; | |
| 97 | 1897 if ((xreg=pop_fregister())==-1) { |
| 94 | 1898 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1899 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1900 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1901 /* pushed order is reversed. We don't need this for comutable |
| 1902 operator, but it is ok to do this. */ | |
| 1903 printf("\tfxch\t%%st(1)\n"); | |
| 1904 } | |
| 1905 return xreg; | |
| 1906 } | |
| 1907 | |
| 1908 | |
| 138 | 1909 void emit_dpop_free(int e1,int d) |
| 82 | 1910 { |
| 1911 } | |
| 81 | 1912 |
| 133 | 1913 void emit_dpush(int type) |
| 82 | 1914 { |
| 119 | 1915 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1916 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1917 freg_stack[freg_sp++]=-1; |
| 94 | 1918 printf("# fpush:%d\n",freg_sp); |
| 1919 } | |
| 1920 | |
| 1921 void | |
| 1922 code_save_stacks() | |
| 1923 { | |
| 1924 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1925 int xreg,sp,screg; | |
| 1926 sp=reg_sp; | |
| 1927 while(sp-->0) { | |
| 1928 if ((xreg=reg_stack[sp])>=0) { | |
| 1929 screg=creg; | |
| 1930 if(creg!=xreg) { | |
| 1931 if (xreg!=dreg) free_register(xreg); | |
| 1932 creg = xreg; | |
| 1933 } | |
| 1934 code_assign_lvar( | |
| 119 | 1935 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1936 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1937 regv[xreg]=0; | |
| 1938 creg=screg; | |
| 1939 } | |
| 1940 } | |
| 107 | 1941 code_save_fstacks(); |
| 1942 } | |
| 1943 | |
| 1944 void | |
| 1945 code_save_fstacks() | |
| 1946 { | |
| 127 | 1947 int xreg,sp,uses; |
| 1948 uses = use; use = 0; | |
| 94 | 1949 sp=freg_sp; |
| 1950 while(sp-->0) { | |
| 1951 if ((xreg=freg_stack[sp])==-1) { | |
| 1952 code_dassign_lvar( | |
| 119 | 1953 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1954 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 1955 } | |
| 1956 } | |
| 127 | 1957 use = uses; |
| 82 | 1958 } |
| 81 | 1959 |
| 61 | 1960 /* end */ |