Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 187:dffcccf8b1cb
nested COND
| author | kono |
|---|---|
| date | Mon, 01 Dec 2003 19:06:30 +0900 |
| parents | 6391432ca002 |
| children | f53d70110377 |
| 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/", |
| 183 | 12 "/usr/lib/gcc-lib/i386-redhat-linux/2.96/include/", |
| 173 | 13 0 |
| 14 }; | |
| 15 | |
| 16 | |
| 94 | 17 #define SAVE_STACKS 1 |
| 18 | |
| 61 | 19 #define TEXT_EMIT_MODE 0 |
| 20 #define DATA_EMIT_MODE 1 | |
| 21 #define RODATA_EMIT_MODE 2 | |
| 22 | |
| 23 static int output_mode = TEXT_EMIT_MODE; | |
| 24 static int data_alignment = 0; | |
| 25 | |
| 119 | 26 int size_of_int = 4; |
| 165 | 27 int size_of_short = 2; |
| 119 | 28 int size_of_float = 4; |
| 29 int size_of_double = 8; | |
| 30 int size_of_longlong = 8; | |
| 31 int endian = 0; | |
| 32 int MAX_REGISTER=6; /* intel386のレジスタを6つまで使う*/ | |
| 33 #define REAL_MAX_REGISTER 8 /* intel386のレジスタが8つということ*/ | |
| 34 int MAX_DATA_REG=4; | |
| 35 int MAX_POINTER=3; | |
| 36 int MAX_REGISTGER_VAR=2; | |
| 37 int MAX_FREGISTER=1; | |
| 38 | |
| 39 #define MAX_FPU_STACK 7 | |
| 40 | |
| 41 int MAX_INPUT_REGISTER_VAR = 0; | |
| 42 int MAX_CODE_INPUT_REGISTER_VAR = 2; | |
| 43 int MAX_INPUT_DREGISTER_VAR = 0; | |
| 138 | 44 int MAX_INPUT_FREGISTER_VAR = 0; |
| 119 | 45 int MAX_CODE_INPUT_DREGISTER_VAR = 0; |
| 61 | 46 |
| 138 | 47 int reg_sp; /* REGister Stack-Pointer */ |
| 48 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 49 | |
| 50 /* floating point registers */ | |
| 51 | |
| 52 int freg_sp; /* floating point REGister Stack-Pointer */ | |
| 53 int freg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 54 | |
| 55 | |
| 61 | 56 /* |
| 128 | 57 -28 -8 local2 |
| 58 -24 -4 local1 | |
| 59 -20 8 arg3 | |
| 60 -16 4 arg2 | |
| 61 -12 0 arg1 | |
| 62 local2 -20 4 -8 (%edi) | |
| 63 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 64 %edi -12 <- disp_offset %ebp |
| 65 %esi -8 | |
| 66 %ebx -4 | |
| 67 %ebp = %esp 0 | |
| 68 %eip 4 <- arg_offset | |
| 69 arg1 8 0 | |
| 70 arg2 12 4 | |
| 71 see enter/enter1/leave see code_enter | |
| 72 */ | |
| 73 int arg_offset = 8; | |
| 74 int disp_offset = -12; | |
| 75 int func_disp_offset = -12; | |
| 76 int code_disp_offset = 0; | |
| 77 int jump_offset = 0; | |
| 78 | |
| 119 | 79 static int code_disp_label; |
| 80 static int func_disp_label; | |
| 61 | 81 |
| 119 | 82 static int |
| 83 lvar(int l) | |
| 84 { | |
| 85 if (is_code(fnptr)) { | |
| 86 return l+code_disp_offset; | |
| 87 } else if (l<0) { | |
| 88 return l+disp_offset; | |
| 89 } else { | |
| 90 return l+arg_offset; | |
| 91 } | |
| 92 } | |
| 99 | 93 |
| 95 | 94 /* |
| 95 creg currrent virtual register | |
| 96 dreg spare virtual register | |
| 97 | |
| 98 rname[creg] currrent real register | |
| 99 rname[dreg] spare real register | |
| 100 | |
| 101 regs[] virtual register usage | |
| 102 regv[] value in virtual register flag | |
| 103 | |
| 104 reg_name[rname[creg]] | |
| 105 | |
| 106 freg current floating point register | |
| 107 fregv calue in floating point register | |
| 108 */ | |
| 109 | |
| 110 static int dreg; /* general temporal register */ | |
| 111 | |
| 112 int ia32regs[REAL_MAX_REGISTER]; | |
| 113 int ia32regv[REAL_MAX_REGISTER]; | |
| 114 int ia32rname[REAL_MAX_REGISTER]; | |
| 115 | |
| 116 int *regv = ia32regv; | |
| 117 int *regs = ia32regs; | |
| 118 static int *rname = ia32rname; | |
| 119 | |
| 120 int ia32fregs[1]; | |
| 121 int ia32fregv[1]; | |
| 122 | |
| 123 int freg; | |
| 124 int *fregv = ia32fregv; | |
| 125 int *fregs = ia32fregs; | |
| 126 | |
| 61 | 127 |
| 128 #define REG_EAX 0 | |
| 129 #define REG_EBX 1 | |
| 130 #define REG_ECX 2 | |
| 131 #define REG_EDX 3 | |
| 132 #define REG_ESI 4 | |
| 133 #define REG_EDI 5 | |
| 134 #define REG_EBP 6 | |
| 135 #define REG_ESP 7 | |
| 136 | |
| 137 | |
| 138 #define DATA_REG 0 | |
| 139 #define POINTER_REG 3 | |
| 140 static char *reg_name[8]; | |
| 141 static char *reg_name_l[4]; | |
| 142 static char *reg_name_w[4]; | |
| 143 | |
| 93 | 144 static void use_register(int virt, int real, int move); |
| 145 static int virtual(int real); | |
| 146 static void shift(char *op, int reg); | |
| 163 | 147 static void ld_indexx(int byte, int n, int xreg,int sign); |
| 93 | 148 static void data_mode(char *name); |
| 149 static int edx_setup(); | |
| 150 static void edx_cleanup(); | |
| 151 static void local_table(void); | |
| 152 static char * fload(int d); | |
| 153 static int code_d1(double d); | |
| 154 static int code_d2(double d); | |
| 94 | 155 static void code_save_stacks(); |
| 107 | 156 static void code_save_fstacks(); |
| 82 | 157 |
| 61 | 158 void |
| 159 code_init(void) | |
| 160 { | |
| 173 | 161 macro_define("__i386__ 1\n"); |
| 182 | 162 macro_define("__LITTLE_ENDIAN__ 1\n"); |
| 163 macro_define("__STDC__ 1\n"); | |
| 164 macro_define("size_t int\n"); | |
| 165 macro_define("__externsion__\n"); | |
| 166 macro_define("__flexarr\n"); | |
| 183 | 167 macro_define("__builtin_va_list int*\n"); |
| 168 macro_define("wchar_t int\n"); | |
| 173 | 169 |
| 61 | 170 arg_offset = 8; |
| 171 func_disp_offset = -12; | |
| 172 disp_offset = -12; | |
| 173 size_of_int = 4; | |
| 174 endian = 0; | |
| 175 MAX_REGISTER=6; | |
| 176 MAX_DATA_REG=4; | |
| 177 MAX_POINTER=3; | |
| 178 MAX_REGISTER_VAR=2; | |
| 179 | |
| 180 reg_name[REG_EAX] = "%eax"; | |
| 181 reg_name[REG_EBX] = "%ebx"; | |
| 182 reg_name[REG_ECX] = "%ecx"; | |
| 183 reg_name[REG_EDX] = "%edx"; | |
| 184 reg_name[REG_ESI] = "%esi"; | |
| 185 reg_name[REG_EDI] = "%edi"; | |
| 186 reg_name[REG_EBP] = "%ebp"; | |
| 187 reg_name[REG_ESP] = "%esp"; | |
| 188 reg_name_l[REG_EAX] = "%al"; | |
| 189 reg_name_l[REG_EBX] = "%bl"; | |
| 190 reg_name_l[REG_ECX] = "%cl"; | |
| 191 reg_name_l[REG_EDX] = "%dl"; | |
| 192 reg_name_w[REG_EAX] = "%ax"; | |
| 193 reg_name_w[REG_EBX] = "%bx"; | |
| 194 reg_name_w[REG_ECX] = "%cx"; | |
| 195 reg_name_w[REG_EDX] = "%dx"; | |
| 196 | |
| 197 } | |
| 198 | |
| 199 char * | |
| 200 register_name(int i,int byte) | |
| 201 { | |
| 202 if (i<0) { | |
| 203 error(REG_ERR); | |
| 204 return "%eax"; | |
| 205 } | |
| 165 | 206 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 207 return reg_name_l[rname[i]]; |
| 165 | 208 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 209 return reg_name_w[rname[i]]; | |
| 61 | 210 } else { |
| 168 | 211 return reg_name[rname[i]]; /* 0 or 4 means int */ |
| 61 | 212 } |
| 213 } | |
| 214 | |
| 147 | 215 int use_int(int i) { return i;} |
| 216 int use_float(int i) { return i;} | |
| 217 int use_double(int i) { return i;} | |
| 218 | |
| 61 | 219 void |
| 220 gexpr_code_init(void){ | |
| 221 use_register(creg,REG_EAX,0); | |
| 94 | 222 regv[creg]=0; |
| 61 | 223 regv[dreg]=0; |
| 224 } | |
| 225 | |
| 147 | 226 void |
| 227 code_gexpr(int e){ | |
| 228 } | |
| 229 | |
| 61 | 230 int |
| 231 register_var(int r) { | |
| 232 return virtual(r+REG_ESI); | |
| 233 } | |
| 234 | |
| 89 | 235 int |
| 236 get_register(void) | |
| 237 { /* 使われていないレジスタを調べる */ | |
| 238 int i; | |
| 239 for(i=0;i<MAX_REGISTER;i++) { | |
| 240 if (! regs[i]) { /* 使われていないなら */ | |
| 241 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 242 return i; /* その場所を表す番号を返す */ | |
| 243 } | |
| 244 } | |
| 245 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 246 } | |
| 247 | |
| 248 void | |
| 249 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 250 regv[i]=regs[i]=0; | |
| 251 } | |
| 252 | |
| 99 | 253 int |
| 126 | 254 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 255 { |
| 126 | 256 if (is_code) { |
| 257 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 258 i = virtual(i+REG_ESI); | |
| 259 regs[i]=regv[i]=1; | |
| 260 return list3(REGISTER,i,(int)nptr); | |
| 261 } else { | |
| 262 return 0; | |
| 263 } | |
| 99 | 264 } |
| 103 | 265 |
| 99 | 266 int |
| 138 | 267 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 268 { |
| 126 | 269 return 0; |
| 99 | 270 } |
| 271 | |
| 272 int | |
| 138 | 273 get_dregister(int d) |
| 99 | 274 { |
| 275 return -1; | |
| 276 } | |
| 277 | |
| 89 | 278 int |
| 279 register_full(void) | |
| 280 { | |
| 281 int i; | |
| 282 for(i=0;i<MAX_REGISTER;i++) { | |
| 283 if (! regs[i]) { | |
| 284 return 0; | |
| 285 } | |
| 286 } | |
| 287 return 1; | |
| 288 } | |
| 289 | |
| 290 int | |
| 137 | 291 free_register_count(int d) |
| 89 | 292 { |
| 293 int i,count; | |
| 294 count = 0; | |
| 295 for(i=0;i<MAX_REGISTER;i++) { | |
| 296 if (! regs[i] && ! regv[i]) count++; | |
| 297 } | |
| 137 | 298 return d?0:count; |
| 89 | 299 } |
| 300 | |
| 301 void | |
| 302 free_all_register(void) | |
| 303 { | |
| 304 int i; | |
| 305 for(i=0;i<MAX_REGISTER;i++) { | |
| 306 regs[i]=regv[i]=0; | |
| 307 } | |
| 308 creg = get_register(); | |
| 309 dreg = get_register(); | |
| 310 return; | |
| 311 } | |
| 312 | |
| 313 | |
| 314 void | |
| 315 register_usage(char *s) | |
| 316 { | |
| 317 int i; | |
| 318 if (chk) return; | |
| 319 printf("# %d: %s:",lineno,s); | |
| 320 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 321 for(i=0;i<MAX_REGISTER;i++) { | |
| 322 printf("%d",regs[i]); | |
| 323 } | |
| 324 printf(":"); | |
| 325 for(i=0;i<MAX_REGISTER;i++) { | |
| 326 printf("%d",regv[i]); | |
| 327 } | |
| 328 #if 0 | |
| 329 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 330 for(i=reg_sp;i>=0;i--) { | |
| 331 if(reg_stack[i]>=0) | |
| 332 printf(" %s",register_name(reg_stack[i],0)); | |
| 333 } | |
| 334 #endif | |
| 94 | 335 printf(" f:%d",freg_sp); |
| 89 | 336 printf("\n"); |
| 337 } | |
| 338 | |
| 109 | 339 void |
| 137 | 340 code_arg_register(NMTBL *fnptr) |
| 109 | 341 { |
| 137 | 342 int args = fnptr->dsp; |
| 343 NMTBL *n; | |
| 344 int reg_var = 0; | |
| 345 int freg_var = 0; | |
| 346 int type; | |
| 347 int reg; | |
| 348 int is_code0 = is_code(fnptr); | |
| 349 | |
| 350 while (args) { | |
| 351 /* process in reverse order */ | |
| 352 n = (NMTBL*)caddr(args); | |
| 353 type = n->ty; | |
| 354 if (scalar(type)) { | |
| 355 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 356 n->sc = REGISTER; | |
| 357 n->dsp = cadr(reg); | |
| 358 regv[n->dsp]= 1; | |
| 359 regs[n->dsp]= INPUT_REG; | |
| 360 reg_var++; | |
| 361 cadddr(args)=size_of_int; /* why we need this? */ | |
| 362 } | |
| 363 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 364 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 365 n->sc = DREGISTER; |
| 366 n->dsp = cadr(reg); | |
| 367 fregv[n->dsp]= 1; | |
| 368 fregs[n->dsp]= INPUT_REG; | |
| 369 freg_var++; | |
| 370 cadddr(args)=size(type); /* why we need this? */ | |
| 371 } | |
| 372 } | |
| 373 args = cadr(args); | |
| 374 } | |
| 109 | 375 } |
| 376 | |
| 89 | 377 void |
| 378 gexpr_init(void) | |
| 379 { | |
| 380 while(reg_sp > 0) { | |
| 94 | 381 if (reg_stack[--reg_sp]>=0) |
| 382 free_register(reg_stack[reg_sp]); | |
| 89 | 383 } |
| 94 | 384 freg_sp = 0; |
| 89 | 385 text_mode(); |
| 386 gexpr_code_init(); | |
| 387 register_usage("gexpr_init"); | |
| 388 } | |
| 389 | |
| 390 | |
| 391 void | |
| 392 emit_init(void) | |
| 393 { | |
| 394 int i; | |
| 395 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 396 free_all_register(); | |
| 397 reg_sp = 0; | |
| 94 | 398 freg_sp = 0; |
| 89 | 399 text_mode(); |
| 400 } | |
| 401 | |
| 402 int | |
| 403 virtual(int real) | |
| 404 { | |
| 405 int real_v,i; | |
| 406 real_v = -1; | |
| 407 for(i=0;i<MAX_REGISTER;i++) { | |
| 408 if (rname[i]==real) { | |
| 409 real_v=i; | |
| 410 break; | |
| 411 } | |
| 412 } | |
| 413 return real_v; | |
| 414 } | |
| 415 | |
| 416 int | |
| 417 pop_register(void) | |
| 418 { /* レジスタから値を取り出す */ | |
| 419 return reg_stack[--reg_sp]; | |
| 420 } | |
| 421 | |
| 422 void | |
| 423 emit_pop_free(int xreg) | |
| 424 { | |
| 159 | 425 if (xreg==dreg||xreg==creg) { |
| 89 | 426 regv[dreg]=0; |
| 98 | 427 } else if (xreg>=0) { |
| 89 | 428 free_register(xreg); |
| 429 } | |
| 430 } | |
| 431 | |
| 432 | |
| 61 | 433 int |
| 105 | 434 get_register_var(NMTBL *nptr) |
| 61 | 435 { |
| 436 int i; | |
| 437 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 438 if (! regs[i]) { /* 使われていないなら */ | |
| 439 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 440 regv[i]=0; | |
| 105 | 441 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 442 } |
| 443 } | |
| 104 | 444 return list2(LVAR,new_lvar(size_of_int)); |
| 445 } | |
| 446 | |
| 447 int | |
| 138 | 448 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 449 { |
| 138 | 450 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 451 } |
| 452 | |
| 61 | 453 void |
| 454 use_register(int virt, int real, int move) | |
| 455 { | |
| 456 int real_v; | |
| 457 char *move_op; | |
| 458 if (rname[virt]==real) | |
| 459 return; | |
| 460 real_v = virtual(real); | |
| 461 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 462 if (move || (regv[real_v])) { | |
| 463 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 464 } | |
| 465 rname[real_v] = rname[virt]; | |
| 466 rname[virt] = real; | |
| 467 } | |
| 468 | |
| 469 void | |
| 470 use_pointer(int virt, int move) | |
| 471 { | |
| 472 int i; | |
| 473 if (rname[virt]>=POINTER_REG) | |
| 474 return; | |
| 475 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 476 if (!regs[virtual(i)]) { | |
| 477 use_register(virt,i,move); | |
| 478 return; | |
| 479 } | |
| 480 } | |
| 481 /* we prefer EBX */ | |
| 482 use_register(virt,REG_EBX,move); | |
| 483 } | |
| 484 | |
| 485 void | |
| 486 use_data_reg(int virt, int move) | |
| 487 { | |
| 488 int i; | |
| 489 if (rname[virt]<MAX_DATA_REG) | |
| 490 return; | |
| 491 for(i=0;i<MAX_DATA_REG;i++) { | |
| 492 if (!regs[virtual(i)]) { | |
| 493 use_register(virt,i,move); | |
| 494 return; | |
| 495 } | |
| 496 } | |
| 497 /* we prefer EBX */ | |
| 498 use_register(virt,REG_EBX,move); | |
| 499 } | |
| 500 | |
| 501 | |
| 502 void | |
| 107 | 503 emit_push() |
| 61 | 504 { |
| 505 int new_reg; | |
| 506 new_reg = get_register(); | |
| 159 | 507 if (new_reg==creg) error(-1); |
| 61 | 508 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 509 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 510 reg_stack[reg_sp++] = -1; |
| 511 printf("\tpushl %s\n",register_name(creg,0)); | |
| 512 /* creg is used soon, don't regv[creg]=0 */ | |
| 513 } else { | |
| 514 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 515 creg = new_reg; | |
| 516 regv[creg]=1; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 int | |
| 521 emit_pop(int type) | |
| 522 { | |
| 523 int xreg; | |
| 524 if ((xreg=pop_register())==-1) { | |
| 525 if (type==POINTER_REG) | |
| 526 use_pointer(dreg,0); | |
| 527 else if (type==DATA_REG) | |
| 528 use_data_reg(dreg,0); | |
| 529 if (regv[dreg]) { | |
| 530 printf("# emit_pop dreg conflict\n"); | |
| 94 | 531 error(-1); |
| 61 | 532 } |
| 533 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 534 regv[dreg]=1; |
| 535 return dreg; | |
| 536 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 537 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 538 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 539 regv[dreg]=1; |
| 540 return dreg; | |
| 541 } | |
| 61 | 542 return xreg; |
| 543 } | |
| 544 | |
| 186 | 545 int |
| 546 stack_top(int type) | |
| 547 { | |
| 548 int xreg; | |
| 549 if (type==INT) { | |
| 550 xreg = reg_stack[reg_sp]; | |
| 551 if (xreg<= -REG_LVAR_OFFSET) { | |
| 552 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 553 } else { | |
| 554 return list2(REGISTER,xreg); | |
| 555 } | |
| 556 } else { | |
| 557 xreg = freg_stack[freg_sp]; | |
| 558 if (xreg<= -REG_LVAR_OFFSET) { | |
| 559 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 187 | 560 } else { |
| 186 | 561 return list2(DREGISTER,xreg); |
| 562 } | |
| 563 } | |
| 564 return xreg; | |
| 565 } | |
| 566 | |
| 567 | |
| 568 | |
| 92 | 569 void |
| 570 code_label(int labelno) | |
| 571 { | |
| 572 printf("_%d:\n",labelno); | |
| 573 } | |
| 61 | 574 |
| 575 void | |
| 107 | 576 code_gvar(int e1,int creg) { |
| 109 | 577 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 578 regv[creg]=1; |
| 61 | 579 } |
| 580 | |
| 581 | |
| 582 void | |
| 107 | 583 code_rgvar(int e1,int creg) { |
| 109 | 584 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 585 regv[creg]=1; |
| 61 | 586 } |
| 166 | 587 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 588 void |
| 165 | 589 code_crgvar(int e1,int creg,int sign,int sz){ |
| 590 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 591 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 592 regv[creg]=1; |
| 61 | 593 } |
| 594 | |
| 595 | |
| 596 void | |
| 107 | 597 code_lvar(int e2,int creg) { |
| 119 | 598 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 599 regv[creg]=1; |
| 61 | 600 } |
| 601 | |
| 602 | |
| 603 void | |
| 107 | 604 code_register(int e2,int creg) { |
| 61 | 605 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 606 regv[creg]=1; |
| 61 | 607 } |
| 608 | |
| 609 | |
| 610 void | |
| 94 | 611 code_rlvar(int e2,int reg) { |
| 119 | 612 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 613 regv[creg]=1; |
| 61 | 614 } |
| 615 | |
| 616 | |
| 617 void | |
| 165 | 618 code_crlvar(int e2,int reg,int sign,int sz) { |
| 619 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 620 regv[creg]=1; |
| 61 | 621 } |
| 622 | |
| 623 | |
| 624 void | |
| 109 | 625 code_fname(NMTBL *n,int creg) { |
| 626 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 627 regv[creg]=1; |
| 61 | 628 } |
| 629 | |
| 630 | |
| 631 void | |
| 107 | 632 code_const(int e2,int creg) { |
| 61 | 633 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 634 regv[creg]=1; |
| 61 | 635 } |
| 636 | |
| 637 | |
| 638 void | |
| 107 | 639 code_neg(int creg) { |
| 61 | 640 printf("\tnegl %s\n", register_name(creg,0)); |
| 641 } | |
| 642 | |
| 643 | |
| 644 void | |
| 107 | 645 code_not(int creg) { |
| 61 | 646 printf("\tnotl %s\n", register_name(creg,0)); |
| 647 } | |
| 648 | |
| 649 | |
| 650 void | |
| 107 | 651 code_lnot(int creg) { |
| 61 | 652 char *xrn; |
| 653 use_data_reg(creg,1); | |
| 654 xrn = register_name(creg,1); | |
| 655 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 656 printf("\tsete %s\n", xrn); | |
| 657 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 658 } | |
| 659 | |
| 660 void | |
| 168 | 661 code_preinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 662 char *xrn; |
| 663 if (car(e2)==REGISTER) { | |
| 168 | 664 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 665 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 666 regv[reg]=1; | |
| 61 | 667 return; |
| 668 } | |
| 669 g_expr(e2); | |
| 670 xrn = register_name(creg,0); | |
| 168 | 671 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 672 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); | |
| 61 | 673 } |
| 674 | |
| 675 | |
| 676 void | |
| 168 | 677 code_postinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 678 char *xrn; |
| 679 if (car(e2)==REGISTER) { | |
| 107 | 680 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 168 | 681 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 682 regv[reg]=1; |
| 61 | 683 return; |
| 684 } | |
| 685 g_expr(e2); | |
| 686 emit_push(); | |
| 687 xrn = register_name((e2=emit_pop(0)),0); | |
| 165 | 688 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 168 | 689 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 61 | 690 emit_pop_free(e2); |
| 691 } | |
| 692 | |
| 693 | |
| 694 | |
| 695 void | |
| 107 | 696 code_return(int creg) { |
| 61 | 697 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 698 regv[creg]=1; |
| 61 | 699 } |
| 700 | |
| 701 | |
| 702 void | |
| 107 | 703 code_environment(int creg) { |
| 61 | 704 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 705 regv[creg]=1; |
| 61 | 706 } |
| 707 | |
| 708 | |
| 709 void | |
| 116 | 710 code_bool(int e1) { |
| 61 | 711 char *xrn; |
| 712 int e2,e3; | |
| 713 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 714 xrn = register_name(creg,0); | |
| 715 printf("\txorl %s,%s\n",xrn,xrn); | |
| 716 jmp(e3=fwdlabel()); | |
| 717 fwddef(e2); | |
| 718 printf("\tmovl $1,%s\n",xrn); | |
| 719 fwddef(e3); | |
| 107 | 720 regv[creg]=1; |
| 61 | 721 } |
| 722 | |
| 723 char * | |
| 724 code_gt(int cond) { | |
| 725 return (cond?"g":"le"); | |
| 726 } | |
| 727 | |
| 728 char * | |
| 729 code_ugt(int cond) { | |
| 730 return (cond?"a":"be"); | |
| 731 } | |
| 732 | |
| 733 char * | |
| 734 code_ge(int cond) { | |
| 735 return (cond?"ge":"l"); | |
| 736 } | |
| 737 | |
| 738 char * | |
| 739 code_uge(int cond) { | |
| 740 return (cond?"ae":"b"); | |
| 741 } | |
| 742 | |
| 743 char * | |
| 744 code_eq(int cond) { | |
| 745 return (cond?"e":"ne"); | |
| 746 } | |
| 747 | |
| 748 void | |
| 167 | 749 code_cmp_crgvar(int e1,int sz) { |
| 750 if (sz==1) | |
| 751 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 752 else if (sz==size_of_short) | |
| 753 printf("\tcmpw $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 61 | 754 } |
| 755 | |
| 756 | |
| 757 void | |
| 167 | 758 code_cmp_crlvar(int e1,int sz) { |
| 759 if (sz==1) | |
| 760 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); | |
| 761 else if (sz==size_of_short) | |
| 762 printf("\tcmpw $0,%d(%%ebp)\n",lvar(e1)); | |
| 61 | 763 } |
| 764 | |
| 765 | |
| 766 void | |
| 767 code_cmp_rgvar(int e1) { | |
| 109 | 768 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 769 } |
| 770 | |
| 771 | |
| 772 void | |
| 773 code_cmp_rlvar(int e1) { | |
| 119 | 774 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 775 } |
| 776 | |
| 777 | |
| 778 void | |
| 779 code_cmp_register(int e2) { | |
| 780 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 781 } | |
| 782 | |
| 783 | |
| 784 void | |
| 785 ascii(char *s) | |
| 786 { | |
| 787 printf("\t.string \""); | |
| 788 while(*s) { | |
| 789 if (*s=='\n') | |
| 790 printf("%cn",92); | |
| 791 else if (*s<' ') | |
| 792 printf("%c%03o",92,*s); | |
| 793 else if (*s==34) | |
| 794 printf("%c%c",92,34); | |
| 795 else | |
| 796 printf("%c",*s); | |
| 797 s++; | |
| 798 } | |
| 799 printf("%c\n",34); | |
| 800 } | |
| 801 | |
| 802 void | |
| 107 | 803 code_string(int e1,int creg) |
| 61 | 804 { |
| 805 char *s; | |
| 806 int i,lb; | |
| 807 | |
| 808 if (0) { | |
| 809 s=(char *)cadr(e1); | |
| 810 lb=fwdlabel(); | |
| 811 printf("\tjmp _%d\n",lb); | |
| 812 i=backdef(); | |
| 813 ascii(s); | |
| 814 printf("\t.align 2\n"); | |
| 815 fwddef(lb); | |
| 816 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 817 } else { | |
| 818 s=(char *)cadr(e1); | |
| 819 printf(".section\t.rodata\n"); | |
| 820 lb=fwdlabel(); | |
| 821 printf("_%d:\n",lb); | |
| 822 ascii(s); | |
| 823 if (output_mode==TEXT_EMIT_MODE) { | |
| 824 printf(".text\n"); | |
| 825 } else { | |
| 826 text_mode(); | |
| 827 } | |
| 828 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 829 } | |
| 830 } | |
| 831 | |
| 832 #define MAX_COPY_LEN 20 | |
| 833 | |
| 834 void | |
| 835 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 836 { | |
| 837 int fix = 0; | |
| 838 /* length <0 means upward direction copy */ | |
| 839 switch (length) { | |
| 840 case 0: break; | |
| 841 case 1: case -1: | |
| 842 printf("\tmovb %d(%s),%s\n",offset, | |
| 843 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 844 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 845 register_name(to,0)); | |
| 846 break; | |
| 847 case 2: case -2: | |
| 848 printf("\tmovw %d(%s),%s\n",offset, | |
| 849 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 850 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 851 register_name(to,0)); | |
| 852 break; | |
| 853 case 4: case -4: | |
| 854 printf("\tmovl %d(%s),%s\n",offset, | |
| 855 register_name(from,0), register_name(dreg,0)); | |
| 856 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 857 register_name(to,0)); | |
| 858 break; | |
| 859 default: | |
| 860 if (-MAX_COPY_LEN<length && length <0) { | |
| 861 for(;length<=4;length+=4,offset-=4) | |
| 862 emit_copy(from,to,4,offset,0,det); | |
| 863 for(;length<=2;length+=2,offset-=2) | |
| 864 emit_copy(from,to,2,offset,0,det); | |
| 865 if(length>0) | |
| 866 emit_copy(from,to,length,offset,0,det); | |
| 867 break; | |
| 868 } else if (length <=MAX_COPY_LEN) { | |
| 869 for(;length>=4;length-=4,offset+=4) | |
| 870 emit_copy(from,to,4,offset,0,det); | |
| 871 for(;length>=2;length-=2,offset+=2) | |
| 872 emit_copy(from,to,2,offset,0,det); | |
| 873 if(length>0) | |
| 874 emit_copy(from,to,length,offset,0,det); | |
| 875 break; | |
| 876 } | |
| 877 if (det) { | |
| 878 /* | |
| 879 call bcopy | |
| 880 g_expr(list3(FUNCTION,,); | |
| 881 break; | |
| 882 */ | |
| 883 } | |
| 884 use_register(from,REG_ESI,1); | |
| 885 use_register(to, REG_EDI,1); | |
| 886 use_register(dreg,REG_ECX,0); | |
| 887 if (length<0) { | |
| 888 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 889 printf("\taddl $%d,%%esi\n",-length); | |
| 890 printf("\taddl $%d,%%edi\n",-length); | |
| 891 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 892 if(length%4) { | |
| 893 emit_copy(from,to,length,offset+length/4,0,det); | |
| 894 } | |
| 895 } else { | |
| 896 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 897 fix = (length/4)*4; | |
| 898 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 899 if(length%4) { | |
| 900 emit_copy(from,to,length,offset+length/4,0,det); | |
| 901 } | |
| 902 } | |
| 903 } | |
| 904 if (value) { | |
| 905 /* creg must point top of the destination data */ | |
| 906 /* this code is necessary for the value of assignment or function call */ | |
| 907 /* otherwise we don't need this */ | |
| 908 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 909 if(creg!=to) { | |
| 910 if (to==dreg) | |
| 911 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 912 else { | |
| 913 free_register(creg); creg=to; | |
| 914 } | |
| 915 } | |
| 916 } | |
| 917 regv[from]=regv[to]=regv[dreg]=0; | |
| 918 regv[creg]=1; | |
| 919 } | |
| 920 | |
| 921 int | |
| 922 struct_push(int e4,int t) | |
| 923 { | |
| 81 | 924 int length,xreg,save,lreg,count; |
| 61 | 925 g_expr(e4); |
| 926 length=size(t); | |
| 927 if(length%size_of_int) { | |
| 928 length += size_of_int - (length%size_of_int); | |
| 929 } | |
| 81 | 930 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 931 if (length==0) return count; | |
| 932 else { | |
| 933 printf("\tpushl %d(%s)\n", | |
| 934 length-size_of_int,register_name(creg,0)); | |
| 935 } | |
| 61 | 936 } |
| 937 printf("\tsubl $%d,%%esp\n",length); | |
| 938 if (register_full()) { | |
| 939 save = 1; | |
| 940 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 941 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 942 xreg = lreg; regv[xreg]=0; | |
| 943 } else { | |
| 944 save=0; | |
| 945 xreg = get_register(); | |
| 946 } | |
| 947 if (save) | |
| 948 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 949 else | |
| 950 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 951 regv[xreg]=1; | |
| 952 /* downward direction copy */ | |
| 953 emit_copy(creg,xreg,length,0,0,1); | |
| 954 /* we have value in creg, it may be changed */ | |
| 955 if (save) { | |
| 956 if(creg==xreg) { | |
| 957 creg = get_register(); /* creg is freed in emit_copy */ | |
| 958 } | |
| 959 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 960 regv[xreg]=1; | |
| 961 } else | |
| 962 free_register(xreg); | |
| 963 return length/size_of_int; | |
| 964 } | |
| 965 | |
| 94 | 966 int |
| 61 | 967 function(int e1) |
| 968 { | |
| 127 | 969 int e2,e3,e4,nargs,t,ret_type; |
| 970 NMTBL *n=0; | |
| 61 | 971 int save,saved; |
|
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972 ret_type = cadr(cadddr(e1)); |
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973 if (ret_type==CHAR) ret_type=INT; |
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|
974 |
| 94 | 975 #ifdef SAVE_STACKS |
| 976 code_save_stacks(); | |
| 977 #endif | |
| 137 | 978 if (free_register_count(0)<1) { |
| 61 | 979 for(save = 0;save==dreg||save==creg;save++); |
| 980 printf("\tpushl %s\n",register_name(save,0)); | |
| 981 saved = 1; | |
| 982 } else { | |
| 983 save = get_register(); | |
| 984 saved = 0; | |
| 985 } | |
| 986 regv[save]=0; | |
| 987 e2 = cadr(e1); | |
| 988 nargs = 0; | |
| 989 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 990 t=caddr(e3); | |
| 127 | 991 e4 = car(e3); |
| 61 | 992 if(scalar(t)) { |
| 993 g_expr(e4); | |
| 994 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 995 } else if (t==DOUBLE) { |
| 996 g_expr(e4); | |
| 997 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 998 nargs += size_of_double/size_of_int; |
| 83 | 999 fregv[freg]=0; |
| 82 | 1000 continue; |
| 1001 } else if (t==FLOAT) { | |
| 1002 g_expr(e4); | |
| 1003 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1004 nargs += size_of_float/size_of_int; |
| 83 | 1005 fregv[freg]=0; |
| 82 | 1006 continue; |
| 61 | 1007 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1008 nargs += struct_push(e4,t); | |
| 1009 continue; | |
| 1010 } else { | |
| 1011 error(TYERR); | |
| 1012 } | |
| 1013 ++nargs; | |
| 1014 } | |
| 1015 if (car(e2) == FNAME) { | |
| 1016 n=(NMTBL *)cadr(e2); | |
| 78 | 1017 regv[creg]=0; |
| 1018 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1019 } else { |
| 1020 g_expr(e2); | |
| 78 | 1021 regv[creg]=1; |
| 1022 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1023 } |
| 1024 | |
| 1025 /* we don't have to save creg nor dreg */ | |
| 1026 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1027 regv[dreg]= regv[save]= 0; |
| 61 | 1028 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1029 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1030 regs[creg]=1; regs[dreg]=1; | |
| 1031 | |
| 1032 if (car(e2) == FNAME) { | |
| 1033 printf("\tcall\t%s\n",n->nm); | |
| 1034 } else { | |
| 1035 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1036 } | |
| 1037 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1038 if (saved) { | |
| 1039 printf("\tpopl %s\n",register_name(save,0)); | |
| 1040 } else { | |
| 1041 free_register(save); | |
| 1042 } | |
| 1043 regv[save]=0; | |
| 105 | 1044 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1045 fregv[freg]=1; regv[creg]=0; |
| 105 | 1046 } else if (ret_type==VOID) { |
| 94 | 1047 fregv[freg]=0; regv[creg]=0; |
| 1048 } else { | |
| 1049 fregv[freg]=0; regv[creg]=1; | |
| 1050 } | |
| 105 | 1051 return ret_type; |
| 61 | 1052 } |
| 1053 | |
| 1054 void | |
| 1055 code_frame_pointer(int e3) { | |
| 1056 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1057 } | |
| 1058 | |
| 1059 | |
| 1060 void | |
| 62 | 1061 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1062 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1063 } | |
| 1064 | |
| 1065 | |
| 1066 void | |
| 1067 code_jmp(char *s) { | |
| 1068 printf("\tjmp %s\n",s); | |
| 1069 } | |
| 1070 | |
| 1071 | |
| 1072 void | |
| 1073 code_indirect_jmp(int e2) { | |
| 1074 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1075 } | |
| 1076 | |
| 94 | 1077 int |
| 61 | 1078 rindirect(int e1) /* *(p +5 ) */ |
| 1079 { | |
| 1080 char *op; | |
| 94 | 1081 int e2,e3,byte,t; |
| 61 | 1082 e3 = cadr(e2 = cadr(e1)); |
| 1083 g_expr(e2); | |
| 82 | 1084 switch (car(e1)) { |
| 1085 case FRINDIRECT: case DRINDIRECT: | |
| 163 | 1086 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); |
| 1087 t=DOUBLE; | |
| 1088 return t; | |
| 1089 break; | |
| 1090 case CRINDIRECT: | |
| 1091 byte = 1; op="movsbl";t=CHAR; | |
| 166 | 1092 break; |
| 163 | 1093 case CURINDIRECT: |
| 166 | 1094 byte = 1; op="movzbl";t=UCHAR; |
| 1095 break; | |
| 165 | 1096 case SRINDIRECT: |
| 1097 byte = 1; op="movswl";t=SHORT; | |
| 166 | 1098 break; |
| 165 | 1099 case SURINDIRECT: |
| 166 | 1100 byte = 1; op="movzwl";t=USHORT; |
| 1101 break; | |
| 163 | 1102 case RINDIRECT: default: |
| 1103 byte = 0; op="movl";t=INT; | |
| 1104 } | |
| 61 | 1105 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1106 return t; |
| 61 | 1107 } |
| 1108 | |
| 1109 char * | |
| 1110 move(int byte) | |
| 1111 { | |
| 165 | 1112 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1113 } |
| 1114 | |
| 1115 void | |
| 103 | 1116 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1117 if (byte) use_data_reg(creg,1); |
| 109 | 1118 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1119 } |
| 1120 | |
| 1121 void | |
| 103 | 1122 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1123 if (byte) use_data_reg(creg,1); |
| 119 | 1124 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1125 } |
| 1126 | |
| 1127 void | |
| 111 | 1128 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1129 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1130 } | |
| 1131 | |
| 1132 void | |
| 118 | 1133 code_assign(int e2,int byte,int creg) { |
| 95 | 1134 if (byte) use_data_reg(creg,1); |
| 61 | 1135 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1136 regv[creg]=1; |
| 61 | 1137 } |
| 1138 | |
| 1139 void | |
| 1140 code_register_assop(int e2,int op,int byte) { | |
| 1141 int reg; | |
| 1142 int xreg = creg; | |
| 1143 creg = reg = e2; | |
| 1144 tosop(op,xreg); | |
| 1145 creg = xreg; | |
| 1146 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1147 regs[creg]=regv[creg]=1; |
| 61 | 1148 } |
| 1149 | |
| 1150 | |
| 1151 void | |
| 163 | 1152 code_assop(int op,int byte,int sign) { |
| 61 | 1153 char *xrn; |
| 1154 int xreg; | |
| 1155 int edx = edx_setup(); | |
| 1156 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1157 regv[xreg]=regs[xreg]=1; | |
| 1158 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1159 regv[edx]=1; | |
| 163 | 1160 ld_indexx(byte,0,edx,sign); |
| 61 | 1161 tosop(op,xreg); |
| 165 | 1162 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1163 edx_cleanup(); |
| 1164 emit_pop_free(xreg); | |
| 144 | 1165 regv[creg]=1; |
| 61 | 1166 } |
| 1167 | |
| 1168 | |
| 1169 void | |
| 1170 tosop(int op,int oreg) | |
| 1171 { | |
| 1172 int dx; | |
| 1173 char *orn,*crn; | |
| 1174 | |
| 1175 switch(op) { | |
| 1176 case LSHIFT: | |
| 1177 case ULSHIFT: | |
| 1178 shift("sall",oreg); | |
| 144 | 1179 regv[creg]=1; |
| 61 | 1180 return; |
| 1181 case RSHIFT: | |
| 1182 shift("sarl",oreg); | |
| 144 | 1183 regv[creg]=1; |
| 61 | 1184 return; |
| 1185 case URSHIFT: | |
| 1186 shift("shrl",oreg); | |
| 144 | 1187 regv[creg]=1; |
| 61 | 1188 return; |
| 1189 } | |
| 1190 if(oreg==-1) { | |
| 1191 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1192 oreg = dreg; | |
| 1193 regv[dreg]=1; | |
| 94 | 1194 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1195 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1196 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1197 oreg = dreg; |
| 1198 regv[dreg]=1; | |
| 61 | 1199 } |
| 1200 regv[oreg]=1; regs[oreg]=1; | |
| 1201 orn = register_name(oreg,0); | |
| 1202 crn = register_name(creg,0); | |
| 1203 switch(op) { | |
| 1204 case ADD: | |
| 1205 printf("\taddl %s,%s\n",orn,crn); | |
| 1206 break; | |
| 89 | 1207 case SUB: case CMP: |
| 61 | 1208 printf("\tsubl %s,%s\n",orn,crn); |
| 1209 break; | |
| 1210 case BAND: | |
| 1211 printf("\tandl %s,%s\n",orn,crn); | |
| 1212 break; | |
| 1213 case EOR: | |
| 1214 printf("\txorl %s,%s\n",orn,crn); | |
| 1215 break; | |
| 1216 case BOR: | |
| 1217 printf("\torl %s,%s\n",orn,crn); | |
| 1218 break; | |
| 1219 case MUL: | |
| 1220 case UMUL: | |
| 1221 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1222 break; | |
| 1223 case DIV: | |
| 1224 case UDIV: | |
| 1225 use_register(creg,REG_EAX,1); | |
| 1226 edx_setup(); | |
| 1227 orn = register_name(oreg,0); | |
| 1228 if (op==DIV) | |
| 127 | 1229 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1230 else |
| 127 | 1231 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1232 edx_cleanup(); |
| 1233 break; | |
| 1234 case MOD: | |
| 1235 case UMOD: | |
| 1236 use_register(creg,REG_EAX,1); | |
| 1237 edx_setup(); | |
| 1238 orn = register_name(oreg,0); | |
| 1239 if (op==DIV) | |
| 127 | 1240 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1241 else |
| 127 | 1242 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1243 dx = virtual(REG_EDX); |
| 1244 if (dx!=creg) { | |
| 1245 rname[dx]=rname[creg]; | |
| 1246 rname[creg]=REG_EDX; | |
| 1247 } | |
| 1248 edx_cleanup(); | |
| 1249 break; | |
| 1250 } | |
| 159 | 1251 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1252 free_register(oreg); |
| 94 | 1253 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1254 regv[creg]=1; |
| 61 | 1255 } |
| 1256 | |
| 1257 static int edx_stack=0; | |
| 1258 | |
| 1259 int | |
| 1260 edx_setup() | |
| 1261 { | |
| 1262 int edx_save; | |
| 1263 /* make real EDX register empty */ | |
| 137 | 1264 if (free_register_count(0)<1) { |
| 61 | 1265 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1266 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1267 edx_stack = list3(edx_save,edx_stack,0); | |
| 1268 } else { | |
| 1269 edx_save = get_register(); | |
| 1270 edx_stack = list3(edx_save,edx_stack,1); | |
| 1271 } | |
| 1272 regv[edx_save]=0; | |
| 1273 use_register(edx_save,REG_EDX,0); | |
| 1274 return edx_save; | |
| 1275 } | |
| 1276 | |
| 1277 | |
| 1278 void | |
| 1279 edx_cleanup() | |
| 1280 { | |
| 1281 if (caddr(edx_stack)==0) { | |
| 1282 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1283 } else | |
| 1284 free_register(car(edx_stack)); | |
| 1285 edx_stack = cadr(edx_stack); | |
| 1286 } | |
| 1287 | |
| 1288 void | |
| 1289 shift(char *op, int reg) | |
| 1290 { | |
| 1291 if (reg>=0) { | |
| 1292 use_register(reg,REG_ECX,1); | |
| 103 | 1293 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1294 use_register(dreg,REG_ECX,0); | |
| 119 | 1295 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1296 reg = dreg; |
| 1297 regv[dreg]=0; | |
| 61 | 1298 } else { |
| 1299 use_register(dreg,REG_ECX,0); | |
| 1300 printf("\tpopl %%ecx\n"); | |
| 103 | 1301 regv[dreg]=0; |
| 61 | 1302 } |
| 1303 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1304 } | |
| 1305 | |
| 1306 void | |
| 163 | 1307 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1308 { |
| 1309 char *op; | |
| 1310 | |
| 166 | 1311 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1312 if (n) |
| 95 | 1313 printf("\t%s %d(%s),%s\n",op,n, |
| 1314 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1315 else |
| 95 | 1316 printf("\t%s (%s),%s\n",op, |
| 1317 register_name(xreg,0),register_name(creg,byte)); | |
| 1318 } | |
| 1319 | |
| 1320 int | |
| 1321 code_csvalue() | |
| 1322 { | |
| 123 | 1323 return rname[creg]; /* for switch value */ |
| 61 | 1324 } |
| 1325 | |
| 1326 void | |
| 95 | 1327 code_cmpdimm(int e, int csreg) |
| 61 | 1328 { |
| 1329 /* used in dosiwtch() */ | |
| 66 | 1330 if(chk) return; |
| 123 | 1331 use_register(creg,csreg,0); |
| 61 | 1332 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1333 } | |
| 1334 | |
| 1335 void | |
| 66 | 1336 code_opening(char *filename) |
| 61 | 1337 { |
| 1338 printf("\t.file \"%s\"\n",filename); | |
| 1339 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1340 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1341 printf(".text\n"); |
| 1342 } | |
| 1343 | |
| 1344 void | |
| 66 | 1345 code_closing() |
| 61 | 1346 { |
| 78 | 1347 global_table(); |
| 61 | 1348 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1349 } | |
| 1350 | |
| 1351 void | |
| 89 | 1352 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1353 { |
| 89 | 1354 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1355 printf("\tj%s\t_%d\n",s,l1); |
| 1356 } | |
| 1357 | |
| 82 | 1358 |
| 1359 void | |
| 61 | 1360 jcond(int l, char cond) |
| 1361 { | |
| 66 | 1362 if (chk) return; |
| 61 | 1363 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1364 } | |
| 1365 | |
| 1366 void | |
| 1367 jmp(int l) | |
| 1368 { | |
| 1369 control=0; | |
| 66 | 1370 if (chk) return; |
| 61 | 1371 printf("\tjmp\t_%d\n",l); |
| 1372 /* align? */ | |
| 1373 /* | |
| 1374 this is not allowed because of ? operator | |
| 1375 regv[creg]=regv[dreg]=0; | |
| 1376 use_register(creg,REG_EAX,0); | |
| 1377 use_register(dreg,REG_EBX,0); | |
| 1378 */ | |
| 1379 } | |
| 1380 | |
| 1381 void | |
| 1382 gen_comment(char *s) | |
| 1383 { | |
| 66 | 1384 if (chk) return; |
| 1385 printf("## %s",s); | |
| 61 | 1386 } |
| 1387 | |
| 1388 | |
| 1389 void | |
| 1390 code_enter(char *name) | |
| 1391 { | |
| 1392 printf("\t.align 4\n"); | |
| 1393 if (stmode!=STATIC) | |
| 1394 printf(".globl %s\n",name); | |
| 1395 printf("\t.type\t%s,@function\n",name); | |
| 1396 printf("%s:\n",name); | |
| 1397 } | |
| 1398 | |
| 77 | 1399 |
| 61 | 1400 void |
| 1401 code_enter1(int args) | |
| 1402 { | |
| 1403 code_disp_label=fwdlabel(); | |
| 1404 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1405 | |
| 1406 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1407 } | |
| 1408 | |
| 1409 void | |
| 1410 code_leave(char *name) | |
| 1411 { | |
| 63 | 1412 disp&= -size_of_int; |
| 61 | 1413 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1414 printf("_%d:\n",labelno); | |
| 1415 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1416 local_table(); | |
| 1417 labelno++; | |
| 1418 free_all_register(); | |
| 1419 } | |
| 1420 | |
| 1421 void | |
| 1422 enter(char *name) | |
| 1423 { | |
| 1424 printf("\t.align 2\n"); | |
| 1425 if (stmode!=STATIC) | |
| 1426 printf(".globl %s\n",name); | |
| 1427 printf("%s:\n",name); | |
| 1428 printf("\t.type\t%s,@function\n",name); | |
| 1429 printf("\tpushl %%ebp\n"); | |
| 1430 printf("\tmovl %%esp,%%ebp\n"); | |
| 1431 printf("\tpushl %%ebx\n"); | |
| 1432 printf("\tpushl %%esi\n"); | |
| 1433 printf("\tpushl %%edi\n"); | |
| 1434 } | |
| 1435 | |
| 1436 void | |
| 1437 enter1() | |
| 1438 { | |
| 182 | 1439 text_mode(); |
| 61 | 1440 func_disp_label=fwdlabel(); |
| 1441 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1442 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1443 } | |
| 1444 | |
| 1445 void | |
| 1446 leave(int control, char *name) | |
| 1447 { | |
| 128 | 1448 int sz; |
| 1449 | |
| 1450 disp &= -size_of_int; | |
| 61 | 1451 if (control) |
| 108 | 1452 code_set_return_register(1); |
| 61 | 1453 if (retcont) { |
| 1454 if (control) | |
| 1455 jmp(retlabel); | |
| 1456 fwddef(retcont); | |
| 128 | 1457 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1458 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1459 } else if (cadr(fnptr->ty)>0&&( | |
| 1460 car(cadr(fnptr->ty))==STRUCT || | |
| 1461 car(cadr(fnptr->ty))==UNION)) { | |
| 1462 sz = size(cadr(fnptr->ty)); | |
| 1463 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1464 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1465 register_name(creg,0)); | |
| 1466 emit_copy(dreg,creg,sz,0,1,1); | |
| 1467 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1468 use_register(creg,REG_EAX,0); | |
| 1469 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1470 } | |
| 61 | 1471 } |
| 1472 fwddef(retlabel); | |
| 63 | 1473 |
| 61 | 1474 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1475 printf("\tpopl %%edi\n"); | |
| 1476 printf("\tpopl %%esi\n"); | |
| 1477 printf("\tpopl %%ebx\n"); | |
| 1478 printf("\tleave\n"); | |
| 1479 printf("\tret\n"); | |
| 1480 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1481 printf("_%d:\n",labelno); | |
| 1482 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1483 local_table(); | |
| 1484 labelno++; | |
| 1485 free_all_register(); | |
| 1486 } | |
| 1487 | |
| 187 | 1488 int |
| 1489 code_get_fixed_creg(int reg,int type) { | |
| 1490 if (type==FLOAT||type==DOUBLE) { | |
| 1491 return 0; | |
| 1492 } else { | |
| 1493 return rname[reg]; | |
| 1494 } | |
| 1495 } | |
| 61 | 1496 |
| 1497 void | |
| 187 | 1498 code_set_fixed_creg(int reg,int mode,int type) { |
| 108 | 1499 if (type==FLOAT||type==DOUBLE) { |
| 187 | 1500 } else { |
| 1501 use_register(creg,reg,mode); | |
| 1502 } | |
| 61 | 1503 } |
| 1504 | |
| 1505 void | |
| 107 | 1506 code_set_return_register(int mode) { |
| 1507 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1508 } else { | |
| 1509 use_register(creg,REG_EAX,mode); | |
| 1510 } | |
| 1511 } | |
| 1512 | |
| 1513 void | |
| 61 | 1514 gen_gdecl(char *n, int gpc) |
| 1515 { | |
| 1516 /* | |
| 1517 if (stmode!=STATIC) | |
| 1518 printf(".globl %s\n",n); | |
| 1519 */ | |
| 1520 } | |
| 1521 | |
| 1522 void | |
| 1523 align(int t) | |
| 1524 { | |
| 1525 if (t!=CHAR) { | |
| 1526 if (data_alignment & 1) | |
| 1527 printf("\t.align 2\n"); | |
| 1528 data_alignment = 0; | |
| 1529 } | |
| 1530 } | |
| 1531 | |
| 1532 void | |
| 1533 emit_data(int e, int t, NMTBL *n) | |
| 1534 { | |
| 1535 int l; | |
| 82 | 1536 double d; |
| 1537 float f; | |
| 61 | 1538 char *name; |
| 1539 name = n->nm; | |
| 156 | 1540 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1541 error(-1); return; |
| 1542 } | |
| 66 | 1543 if (chk) return; |
| 61 | 1544 if (n->dsp != -1) { |
| 1545 n->dsp = -1; /* initiallized flag */ | |
| 1546 printf(".globl\t%s\n",name); | |
| 1547 data_mode(name); | |
| 1548 align(t); | |
| 1549 printf("%s:\n",name); | |
| 1550 } else { | |
| 1551 data_mode(0); | |
| 1552 } | |
| 1553 if(car(e)==CONST) { | |
| 168 | 1554 if (t==CHAR||t==UCHAR) { |
| 61 | 1555 printf("\t.byte %d\n",cadr(e)); |
| 1556 if (data_alignment>0) | |
| 1557 data_alignment++; | |
| 1558 gpc += 1; | |
| 168 | 1559 } else if (t==SHORT||t==USHORT) { |
| 1560 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1561 if (data_alignment>0) data_alignment++; |
| 168 | 1562 gpc += size_of_short; |
| 61 | 1563 } else { |
| 1564 printf("\t.long %d\n",cadr(e)); | |
| 1565 gpc += size_of_int; | |
| 1566 } | |
| 82 | 1567 } else if(t==DOUBLE) { |
| 1568 d = dcadr(e); | |
| 1569 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1570 } else if(t==FLOAT) { | |
| 1571 f = dcadr(e); | |
| 1572 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1573 } else if(t!=CHAR) { |
| 1574 gpc += size_of_int; | |
| 1575 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1576 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1577 } else if(car(e)==GVAR) { | |
| 1578 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1579 } else if(car(e)==FNAME) { |
| 1580 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1581 } else if(car(e)==STRING) { | |
| 1582 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1583 l = fwdlabel(); | |
| 1584 printf("\t.long _%d\n",l); | |
| 1585 printf(".section\t.rodata\n"); | |
| 1586 printf("_%d:\n",l); | |
| 1587 output_mode = RODATA_EMIT_MODE; | |
| 1588 } | |
| 1589 ascii((char *)cadr(e)); | |
| 1590 } else error(TYERR); | |
| 168 | 1591 } else error(TYERR); |
| 61 | 1592 } |
| 1593 | |
| 1594 void | |
| 1595 emit_data_closing(NMTBL *n) | |
| 1596 { | |
| 1597 int lb; | |
| 66 | 1598 if (chk) return; |
| 61 | 1599 if (mode==GDECL) { |
| 1600 data_mode(0); | |
| 1601 lb=fwdlabel(); | |
| 1602 printf("_%d:\n",lb); | |
| 1603 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1604 } | |
| 1605 } | |
| 1606 | |
| 1607 void | |
| 1608 global_table(void) | |
| 1609 { | |
| 1610 NMTBL *n; | |
| 1611 int init; | |
| 1612 init=0; | |
| 1613 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1614 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1615 /* n->dsp = -1 means initialized global */ |
| 1616 if (init==0) { | |
| 1617 data_mode(0); | |
| 1618 init=1; | |
| 1619 } | |
| 1620 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1621 } | |
| 1622 } | |
| 1623 } | |
| 1624 | |
| 1625 void | |
| 1626 local_table(void) | |
| 1627 { | |
| 1628 NMTBL *n; | |
| 1629 int init; | |
| 1630 init=0; | |
| 1631 /* static local variables */ | |
| 1632 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1633 if (n->sc == GVAR) { | |
| 1634 if (init==0) { | |
| 1635 data_mode(0); | |
| 1636 init=1; | |
| 1637 } | |
| 156 | 1638 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1639 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1640 } |
| 1641 } | |
| 1642 } | |
| 1643 | |
| 1644 void | |
| 1645 text_mode(void) | |
| 1646 { | |
| 1647 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1648 printf(".text\n"); | |
| 1649 printf("\t.align 2\n"); | |
| 1650 output_mode = TEXT_EMIT_MODE; | |
| 1651 } | |
| 1652 } | |
| 1653 | |
| 1654 void | |
| 1655 data_mode(char *name) | |
| 1656 { | |
| 1657 if (output_mode!=DATA_EMIT_MODE) { | |
| 1658 printf(".data\n"); | |
| 1659 output_mode = DATA_EMIT_MODE; | |
| 1660 } | |
| 1661 if (name) | |
| 1662 printf("\t.type\t%s,@object\n",name); | |
| 1663 } | |
| 1664 | |
| 81 | 1665 /* floating point */ |
| 1666 | |
| 1667 | |
| 82 | 1668 char * |
| 1669 fstore(int d) | |
| 1670 { | |
| 83 | 1671 return use? |
| 1672 (d?"fstl":"fsts"): | |
| 1673 (d?"fstpl":"fstps") | |
| 1674 ; | |
| 1675 } | |
| 1676 | |
| 1677 char * | |
| 1678 fstore_u(int d) | |
| 1679 { | |
| 82 | 1680 return d?"fstpl":"fstps"; |
| 1681 } | |
| 81 | 1682 |
| 82 | 1683 char * |
| 1684 fload(int d) | |
| 1685 { | |
| 1686 return d?"fldl":"flds"; | |
| 1687 } | |
| 81 | 1688 |
| 1689 | |
| 103 | 1690 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1691 { |
| 109 | 1692 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1693 } |
| 1694 | |
| 103 | 1695 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1696 { |
| 119 | 1697 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1698 } |
| 1699 | |
| 138 | 1700 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1701 { |
| 1702 error(-1); | |
| 1703 } | |
| 1704 | |
| 103 | 1705 void code_dassign(int e2,int freg,int d) |
| 82 | 1706 { |
| 1707 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1708 } | |
| 1709 | |
| 1710 static double d0 = 1.0; | |
| 81 | 1711 |
| 82 | 1712 int |
| 1713 code_d1(double d) | |
| 1714 { | |
| 1715 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1716 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1717 } | |
| 1718 | |
| 1719 int | |
| 1720 code_d2(double d) | |
| 1721 { | |
| 1722 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1723 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1724 } | |
| 1725 | |
| 138 | 1726 void code_dconst(int e2,int freg,int d) |
| 82 | 1727 { |
| 1728 int lb; | |
| 138 | 1729 double value = dcadr(e2); |
| 81 | 1730 |
| 138 | 1731 if (value==0.0) { |
| 82 | 1732 printf("\tfldz\n"); return; |
| 1733 } | |
| 138 | 1734 if (value==1.0) { |
| 82 | 1735 printf("\tfld1\n"); return; |
| 1736 } | |
| 1737 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1738 lb=fwdlabel(); | |
| 1739 printf("_%d:\n",lb); | |
| 138 | 1740 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1741 if (output_mode==TEXT_EMIT_MODE) { |
| 1742 printf(".text\n"); | |
| 1743 } else { | |
| 1744 text_mode(); | |
| 1745 } | |
| 1746 printf("\tfldl _%d\n",lb); | |
| 1747 } | |
| 1748 | |
| 138 | 1749 void code_dneg(int freg,int d) |
| 82 | 1750 { |
| 1751 printf("\tfchs\n"); | |
| 1752 } | |
| 81 | 1753 |
| 147 | 1754 void code_d2i(int freg) |
| 82 | 1755 { |
| 1756 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1757 printf("\tfnstcw (%%esp)\n"); | |
| 1758 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1759 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1760 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1761 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1762 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1763 printf("\tfldcw (%%esp)\n"); |
| 82 | 1764 printf("\tpopl %s\n",register_name(creg,0)); |
| 1765 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1766 } | |
| 81 | 1767 |
| 147 | 1768 void code_i2d(int creg) |
| 82 | 1769 { |
| 1770 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1771 printf("\tfildl (%%esp)\n"); | |
| 1772 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1773 } | |
| 1774 | |
| 147 | 1775 void code_d2u(int freg) |
| 85 | 1776 { |
| 86 | 1777 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1778 printf("\tfnstcw (%%esp)\n"); |
| 1779 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1780 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1781 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1782 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1783 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1784 printf("\tfldcw (%%esp)\n"); |
| 86 | 1785 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1786 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1787 } |
| 1788 | |
| 147 | 1789 void code_u2d(int creg) |
| 85 | 1790 { |
| 86 | 1791 printf("\tpushl %s\n",register_name(creg,0)); |
| 1792 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1793 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1794 printf("\tfildll (%%esp)\n"); | |
| 1795 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1796 } |
| 1797 | |
| 133 | 1798 void code_d2f(int freg) { } |
| 1799 void code_f2d(int freg) { } | |
| 147 | 1800 void code_f2i(int freg) { code_d2i(freg); } |
| 1801 void code_f2u(int freg) { code_d2u(freg); } | |
| 1802 void code_i2f(int creg) { code_i2d(creg); } | |
| 1803 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1804 |
| 107 | 1805 void code_drgvar(int e2,int d,int freg) |
| 82 | 1806 { |
| 109 | 1807 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1808 } |
| 81 | 1809 |
| 1810 | |
| 107 | 1811 void code_drlvar(int e2,int d,int freg) |
| 82 | 1812 { |
| 119 | 1813 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1814 } |
| 1815 | |
| 138 | 1816 void code_cmp_drgvar(int e2,int d) |
| 82 | 1817 { |
| 109 | 1818 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1819 } |
| 1820 | |
| 138 | 1821 void code_cmp_drlvar(int e2,int d) |
| 82 | 1822 { |
| 119 | 1823 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1824 } |
| 1825 | |
| 1826 void dtosop(int op,int e1) | |
| 94 | 1827 { |
| 82 | 1828 switch(op) { |
| 133 | 1829 case FADD: |
| 82 | 1830 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1831 case FSUB: |
| 85 | 1832 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1833 case FDIV: |
| 85 | 1834 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1835 case FMUL: |
| 82 | 1836 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1837 case FCMP: |
| 89 | 1838 case DCMP: |
| 82 | 1839 printf("\tfucompp\n"); |
| 1840 printf("\tfnstsw\t%%ax\n"); | |
| 1841 break; | |
| 1842 } | |
| 1843 } | |
| 81 | 1844 |
| 83 | 1845 void |
| 1846 code_dassop(int op,int d) { | |
| 1847 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1848 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1849 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1850 dtosop(op,0); | |
| 1851 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1852 } | |
| 1853 | |
| 1854 void | |
| 107 | 1855 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1856 g_expr(e2); |
| 1857 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1858 printf("\tfld1\n"); | |
| 87 | 1859 if (caddr(e1)>0) |
| 83 | 1860 printf("\tfaddp %%st,%%st(1)\n"); |
| 1861 else | |
| 1862 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1863 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1864 } | |
| 1865 | |
| 1866 void | |
| 107 | 1867 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1868 g_expr(e2); |
| 1869 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1870 if (use) | |
| 86 | 1871 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1872 printf("\tfld1\n"); |
| 87 | 1873 if (caddr(e1)>0) |
| 83 | 1874 printf("\tfaddp %%st,%%st(1)\n"); |
| 1875 else | |
| 1876 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1877 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1878 } |
| 1879 | |
| 84 | 1880 void |
| 1881 drexpr(int e1, int e2,int l1, int op) | |
| 1882 { | |
| 89 | 1883 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1884 switch(op) { |
| 1885 case DOP+GE: | |
| 133 | 1886 case FOP+GE: |
| 84 | 1887 printf("\ttestb\t$5,%%ah\n"); |
| 1888 printf("\tjne\t_%d\n",l1); | |
| 1889 break; | |
| 1890 case DOP+GT: | |
| 133 | 1891 case FOP+GT: |
| 84 | 1892 printf("\ttestb\t$69,%%ah\n"); |
| 1893 printf("\tjne\t_%d\n",l1); | |
| 1894 break; | |
| 1895 case DOP+EQ: | |
| 133 | 1896 case FOP+EQ: |
| 84 | 1897 printf("\tandb\t$69,%%ah\n"); |
| 1898 printf("\txorb\t$64,%%ah\n"); | |
| 1899 printf("\tjne\t_%d\n",l1); | |
| 1900 break; | |
| 1901 case DOP+NEQ: | |
| 133 | 1902 case FOP+NEQ: |
| 84 | 1903 printf("\tandb\t$69,%%ah\n"); |
| 1904 printf("\txorb\t$64,%%ah\n"); | |
| 1905 printf("\tje\t_%d\n",l1); | |
| 1906 break; | |
| 1907 } | |
| 1908 } | |
| 1909 | |
| 94 | 1910 void |
| 138 | 1911 code_dregister(int e2,int freg,int d) |
| 94 | 1912 { |
| 1913 error(-1); | |
| 1914 } | |
| 1915 | |
| 138 | 1916 void |
| 1917 code_cmp_dregister(int e2,int d) | |
| 94 | 1918 { |
| 1919 error(-1); | |
| 82 | 1920 } |
| 81 | 1921 |
| 97 | 1922 int pop_fregister() |
| 82 | 1923 { |
| 94 | 1924 if (freg_sp<0) { error(-1); return -1;} |
| 1925 printf("# fpop: %d\n",freg_sp-1); | |
| 1926 return freg_stack[--freg_sp]; | |
| 82 | 1927 } |
| 81 | 1928 |
| 94 | 1929 int |
| 138 | 1930 emit_dpop(int d) |
| 94 | 1931 { |
| 1932 int xreg; | |
| 97 | 1933 if ((xreg=pop_fregister())==-1) { |
| 94 | 1934 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1935 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1936 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1937 /* pushed order is reversed. We don't need this for comutable |
| 1938 operator, but it is ok to do this. */ | |
| 1939 printf("\tfxch\t%%st(1)\n"); | |
| 1940 } | |
| 1941 return xreg; | |
| 1942 } | |
| 1943 | |
| 1944 | |
| 138 | 1945 void emit_dpop_free(int e1,int d) |
| 82 | 1946 { |
| 1947 } | |
| 81 | 1948 |
| 133 | 1949 void emit_dpush(int type) |
| 82 | 1950 { |
| 119 | 1951 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1952 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1953 freg_stack[freg_sp++]=-1; |
| 94 | 1954 printf("# fpush:%d\n",freg_sp); |
| 1955 } | |
| 1956 | |
| 1957 void | |
| 1958 code_save_stacks() | |
| 1959 { | |
| 1960 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1961 int xreg,sp,screg; | |
| 1962 sp=reg_sp; | |
| 1963 while(sp-->0) { | |
| 1964 if ((xreg=reg_stack[sp])>=0) { | |
| 1965 screg=creg; | |
| 1966 if(creg!=xreg) { | |
| 1967 if (xreg!=dreg) free_register(xreg); | |
| 1968 creg = xreg; | |
| 1969 } | |
| 1970 code_assign_lvar( | |
| 119 | 1971 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1972 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1973 regv[xreg]=0; | |
| 1974 creg=screg; | |
| 1975 } | |
| 1976 } | |
| 107 | 1977 code_save_fstacks(); |
| 1978 } | |
| 1979 | |
| 1980 void | |
| 1981 code_save_fstacks() | |
| 1982 { | |
| 127 | 1983 int xreg,sp,uses; |
| 1984 uses = use; use = 0; | |
| 94 | 1985 sp=freg_sp; |
| 1986 while(sp-->0) { | |
| 1987 if ((xreg=freg_stack[sp])==-1) { | |
| 1988 code_dassign_lvar( | |
| 119 | 1989 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1990 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 1991 } | |
| 1992 } | |
| 127 | 1993 use = uses; |
| 82 | 1994 } |
| 81 | 1995 |
| 61 | 1996 /* end */ |