Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 203:28baf6cd9ad1
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| author | kono |
|---|---|
| date | Tue, 13 Apr 2004 10:28:21 +0900 |
| parents | 5f70abd9453d |
| children | 4c614334f3d0 |
| 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); | |
| 195 | 152 #if FLOAT_CODE |
| 93 | 153 static char * fload(int d); |
| 154 static int code_d1(double d); | |
| 155 static int code_d2(double d); | |
| 195 | 156 static void code_save_fstacks(); |
| 157 #endif | |
| 94 | 158 static void code_save_stacks(); |
| 82 | 159 |
| 61 | 160 void |
| 161 code_init(void) | |
| 162 { | |
| 173 | 163 macro_define("__i386__ 1\n"); |
| 182 | 164 macro_define("__LITTLE_ENDIAN__ 1\n"); |
| 165 macro_define("__STDC__ 1\n"); | |
| 166 macro_define("size_t int\n"); | |
| 167 macro_define("__externsion__\n"); | |
| 168 macro_define("__flexarr\n"); | |
| 183 | 169 macro_define("__builtin_va_list int*\n"); |
| 170 macro_define("wchar_t int\n"); | |
| 173 | 171 |
| 61 | 172 arg_offset = 8; |
| 173 func_disp_offset = -12; | |
| 174 disp_offset = -12; | |
| 175 size_of_int = 4; | |
| 176 endian = 0; | |
| 177 MAX_REGISTER=6; | |
| 178 MAX_DATA_REG=4; | |
| 179 MAX_POINTER=3; | |
| 180 MAX_REGISTER_VAR=2; | |
| 181 | |
| 182 reg_name[REG_EAX] = "%eax"; | |
| 183 reg_name[REG_EBX] = "%ebx"; | |
| 184 reg_name[REG_ECX] = "%ecx"; | |
| 185 reg_name[REG_EDX] = "%edx"; | |
| 186 reg_name[REG_ESI] = "%esi"; | |
| 187 reg_name[REG_EDI] = "%edi"; | |
| 188 reg_name[REG_EBP] = "%ebp"; | |
| 189 reg_name[REG_ESP] = "%esp"; | |
| 190 reg_name_l[REG_EAX] = "%al"; | |
| 191 reg_name_l[REG_EBX] = "%bl"; | |
| 192 reg_name_l[REG_ECX] = "%cl"; | |
| 193 reg_name_l[REG_EDX] = "%dl"; | |
| 194 reg_name_w[REG_EAX] = "%ax"; | |
| 195 reg_name_w[REG_EBX] = "%bx"; | |
| 196 reg_name_w[REG_ECX] = "%cx"; | |
| 197 reg_name_w[REG_EDX] = "%dx"; | |
| 198 | |
| 199 } | |
| 200 | |
| 201 char * | |
| 202 register_name(int i,int byte) | |
| 203 { | |
| 204 if (i<0) { | |
| 205 error(REG_ERR); | |
| 206 return "%eax"; | |
| 207 } | |
| 165 | 208 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 209 return reg_name_l[rname[i]]; |
| 165 | 210 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 211 return reg_name_w[rname[i]]; | |
| 61 | 212 } else { |
| 168 | 213 return reg_name[rname[i]]; /* 0 or 4 means int */ |
| 61 | 214 } |
| 215 } | |
| 216 | |
| 147 | 217 int use_int(int i) { return i;} |
| 218 int use_float(int i) { return i;} | |
| 219 int use_double(int i) { return i;} | |
| 195 | 220 int use_longlong(int i) { return i; } |
| 221 | |
| 147 | 222 |
| 61 | 223 void |
| 224 gexpr_code_init(void){ | |
| 225 use_register(creg,REG_EAX,0); | |
| 94 | 226 regv[creg]=0; |
| 61 | 227 regv[dreg]=0; |
| 228 } | |
| 229 | |
| 147 | 230 void |
| 231 code_gexpr(int e){ | |
| 232 } | |
| 233 | |
| 61 | 234 int |
| 235 register_var(int r) { | |
| 236 return virtual(r+REG_ESI); | |
| 237 } | |
| 238 | |
| 89 | 239 int |
| 240 get_register(void) | |
| 241 { /* 使われていないレジスタを調べる */ | |
| 242 int i; | |
| 243 for(i=0;i<MAX_REGISTER;i++) { | |
| 244 if (! regs[i]) { /* 使われていないなら */ | |
| 245 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 246 return i; /* その場所を表す番号を返す */ | |
| 247 } | |
| 248 } | |
| 249 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 250 } | |
| 251 | |
| 252 void | |
| 253 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 254 regv[i]=regs[i]=0; | |
| 255 } | |
| 256 | |
| 99 | 257 int |
| 126 | 258 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 259 { |
| 126 | 260 if (is_code) { |
| 261 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 262 i = virtual(i+REG_ESI); | |
| 263 regs[i]=regv[i]=1; | |
| 264 return list3(REGISTER,i,(int)nptr); | |
| 265 } else { | |
| 266 return 0; | |
| 267 } | |
| 99 | 268 } |
| 103 | 269 |
| 99 | 270 int |
| 138 | 271 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 272 { |
| 126 | 273 return 0; |
| 99 | 274 } |
| 275 | |
| 276 int | |
| 138 | 277 get_dregister(int d) |
| 99 | 278 { |
| 279 return -1; | |
| 280 } | |
| 281 | |
| 195 | 282 int |
| 283 get_lregister_var(NMTBL *n) | |
| 284 { | |
| 285 return -1; | |
| 286 } | |
| 287 | |
| 89 | 288 int |
| 289 register_full(void) | |
| 290 { | |
| 291 int i; | |
| 292 for(i=0;i<MAX_REGISTER;i++) { | |
| 293 if (! regs[i]) { | |
| 294 return 0; | |
| 295 } | |
| 296 } | |
| 297 return 1; | |
| 298 } | |
| 299 | |
| 300 int | |
| 137 | 301 free_register_count(int d) |
| 89 | 302 { |
| 303 int i,count; | |
| 304 count = 0; | |
| 305 for(i=0;i<MAX_REGISTER;i++) { | |
| 306 if (! regs[i] && ! regv[i]) count++; | |
| 307 } | |
| 137 | 308 return d?0:count; |
| 89 | 309 } |
| 310 | |
| 311 void | |
| 312 free_all_register(void) | |
| 313 { | |
| 314 int i; | |
| 315 for(i=0;i<MAX_REGISTER;i++) { | |
| 316 regs[i]=regv[i]=0; | |
| 317 } | |
| 318 creg = get_register(); | |
| 319 dreg = get_register(); | |
| 320 return; | |
| 321 } | |
| 322 | |
| 323 | |
| 324 void | |
| 325 register_usage(char *s) | |
| 326 { | |
| 327 int i; | |
| 328 if (chk) return; | |
| 329 printf("# %d: %s:",lineno,s); | |
| 330 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 331 for(i=0;i<MAX_REGISTER;i++) { | |
| 332 printf("%d",regs[i]); | |
| 333 } | |
| 334 printf(":"); | |
| 335 for(i=0;i<MAX_REGISTER;i++) { | |
| 336 printf("%d",regv[i]); | |
| 337 } | |
| 338 #if 0 | |
| 339 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 340 for(i=reg_sp;i>=0;i--) { | |
| 341 if(reg_stack[i]>=0) | |
| 342 printf(" %s",register_name(reg_stack[i],0)); | |
| 343 } | |
| 344 #endif | |
| 94 | 345 printf(" f:%d",freg_sp); |
| 89 | 346 printf("\n"); |
| 347 } | |
| 348 | |
| 109 | 349 void |
| 137 | 350 code_arg_register(NMTBL *fnptr) |
| 109 | 351 { |
| 137 | 352 int args = fnptr->dsp; |
| 353 NMTBL *n; | |
| 354 int reg_var = 0; | |
| 355 int freg_var = 0; | |
| 356 int type; | |
| 357 int reg; | |
| 358 int is_code0 = is_code(fnptr); | |
| 359 | |
| 360 while (args) { | |
| 361 /* process in reverse order */ | |
| 362 n = (NMTBL*)caddr(args); | |
| 363 type = n->ty; | |
| 364 if (scalar(type)) { | |
| 365 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 366 n->sc = REGISTER; | |
| 367 n->dsp = cadr(reg); | |
| 368 regv[n->dsp]= 1; | |
| 369 regs[n->dsp]= INPUT_REG; | |
| 370 reg_var++; | |
| 371 cadddr(args)=size_of_int; /* why we need this? */ | |
| 372 } | |
| 373 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 374 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 375 n->sc = DREGISTER; |
| 376 n->dsp = cadr(reg); | |
| 377 fregv[n->dsp]= 1; | |
| 378 fregs[n->dsp]= INPUT_REG; | |
| 379 freg_var++; | |
| 380 cadddr(args)=size(type); /* why we need this? */ | |
| 381 } | |
| 382 } | |
| 383 args = cadr(args); | |
| 384 } | |
| 109 | 385 } |
| 386 | |
| 89 | 387 void |
| 388 gexpr_init(void) | |
| 389 { | |
| 390 while(reg_sp > 0) { | |
| 94 | 391 if (reg_stack[--reg_sp]>=0) |
| 392 free_register(reg_stack[reg_sp]); | |
| 89 | 393 } |
| 94 | 394 freg_sp = 0; |
| 89 | 395 text_mode(); |
| 396 gexpr_code_init(); | |
| 397 register_usage("gexpr_init"); | |
| 398 } | |
| 399 | |
| 400 | |
| 401 void | |
| 402 emit_init(void) | |
| 403 { | |
| 404 int i; | |
| 405 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 406 free_all_register(); | |
| 407 reg_sp = 0; | |
| 94 | 408 freg_sp = 0; |
| 89 | 409 text_mode(); |
| 410 } | |
| 411 | |
| 412 int | |
| 413 virtual(int real) | |
| 414 { | |
| 415 int real_v,i; | |
| 416 real_v = -1; | |
| 417 for(i=0;i<MAX_REGISTER;i++) { | |
| 418 if (rname[i]==real) { | |
| 419 real_v=i; | |
| 420 break; | |
| 421 } | |
| 422 } | |
| 423 return real_v; | |
| 424 } | |
| 425 | |
| 426 int | |
| 427 pop_register(void) | |
| 428 { /* レジスタから値を取り出す */ | |
| 429 return reg_stack[--reg_sp]; | |
| 430 } | |
| 431 | |
| 432 void | |
| 433 emit_pop_free(int xreg) | |
| 434 { | |
| 159 | 435 if (xreg==dreg||xreg==creg) { |
| 89 | 436 regv[dreg]=0; |
| 98 | 437 } else if (xreg>=0) { |
| 89 | 438 free_register(xreg); |
| 439 } | |
| 440 } | |
| 441 | |
| 442 | |
| 61 | 443 int |
| 105 | 444 get_register_var(NMTBL *nptr) |
| 61 | 445 { |
| 446 int i; | |
| 447 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 448 if (! regs[i]) { /* 使われていないなら */ | |
| 449 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 450 regv[i]=0; | |
| 105 | 451 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 452 } |
| 453 } | |
| 104 | 454 return list2(LVAR,new_lvar(size_of_int)); |
| 455 } | |
| 456 | |
| 457 int | |
| 138 | 458 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 459 { |
| 138 | 460 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 461 } |
| 462 | |
| 61 | 463 void |
| 464 use_register(int virt, int real, int move) | |
| 465 { | |
| 466 int real_v; | |
| 467 char *move_op; | |
| 468 if (rname[virt]==real) | |
| 469 return; | |
| 470 real_v = virtual(real); | |
| 471 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 472 if (move || (regv[real_v])) { | |
| 473 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 474 } | |
| 475 rname[real_v] = rname[virt]; | |
| 476 rname[virt] = real; | |
| 477 } | |
| 478 | |
| 479 void | |
| 480 use_pointer(int virt, int move) | |
| 481 { | |
| 482 int i; | |
| 483 if (rname[virt]>=POINTER_REG) | |
| 484 return; | |
| 485 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 486 if (!regs[virtual(i)]) { | |
| 487 use_register(virt,i,move); | |
| 488 return; | |
| 489 } | |
| 490 } | |
| 491 /* we prefer EBX */ | |
| 492 use_register(virt,REG_EBX,move); | |
| 493 } | |
| 494 | |
| 495 void | |
| 496 use_data_reg(int virt, int move) | |
| 497 { | |
| 498 int i; | |
| 499 if (rname[virt]<MAX_DATA_REG) | |
| 500 return; | |
| 501 for(i=0;i<MAX_DATA_REG;i++) { | |
| 502 if (!regs[virtual(i)]) { | |
| 503 use_register(virt,i,move); | |
| 504 return; | |
| 505 } | |
| 506 } | |
| 507 /* we prefer EBX */ | |
| 508 use_register(virt,REG_EBX,move); | |
| 509 } | |
| 510 | |
| 511 | |
| 512 void | |
| 107 | 513 emit_push() |
| 61 | 514 { |
| 515 int new_reg; | |
| 516 new_reg = get_register(); | |
| 159 | 517 if (new_reg==creg) error(-1); |
| 61 | 518 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 519 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 520 reg_stack[reg_sp++] = -1; |
| 521 printf("\tpushl %s\n",register_name(creg,0)); | |
| 522 /* creg is used soon, don't regv[creg]=0 */ | |
| 523 } else { | |
| 524 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 525 creg = new_reg; | |
| 526 regv[creg]=1; | |
| 527 } | |
| 528 } | |
| 529 | |
| 530 int | |
| 531 emit_pop(int type) | |
| 532 { | |
| 533 int xreg; | |
| 534 if ((xreg=pop_register())==-1) { | |
| 535 if (type==POINTER_REG) | |
| 536 use_pointer(dreg,0); | |
| 537 else if (type==DATA_REG) | |
| 538 use_data_reg(dreg,0); | |
| 539 if (regv[dreg]) { | |
| 540 printf("# emit_pop dreg conflict\n"); | |
| 94 | 541 error(-1); |
| 61 | 542 } |
| 543 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 544 regv[dreg]=1; |
| 545 return dreg; | |
| 546 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 547 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 548 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 549 regv[dreg]=1; |
| 550 return dreg; | |
| 551 } | |
| 61 | 552 return xreg; |
| 553 } | |
| 554 | |
| 186 | 555 int |
| 556 stack_top(int type) | |
| 557 { | |
| 558 int xreg; | |
| 559 if (type==INT) { | |
| 560 xreg = reg_stack[reg_sp]; | |
| 561 if (xreg<= -REG_LVAR_OFFSET) { | |
| 562 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 563 } else { | |
| 564 return list2(REGISTER,xreg); | |
| 565 } | |
| 566 } else { | |
| 567 xreg = freg_stack[freg_sp]; | |
| 568 if (xreg<= -REG_LVAR_OFFSET) { | |
| 569 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 187 | 570 } else { |
| 186 | 571 return list2(DREGISTER,xreg); |
| 572 } | |
| 573 } | |
| 574 return xreg; | |
| 575 } | |
| 576 | |
| 577 | |
| 578 | |
| 92 | 579 void |
| 580 code_label(int labelno) | |
| 581 { | |
| 582 printf("_%d:\n",labelno); | |
| 583 } | |
| 61 | 584 |
| 585 void | |
| 107 | 586 code_gvar(int e1,int creg) { |
| 109 | 587 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 588 regv[creg]=1; |
| 61 | 589 } |
| 590 | |
| 591 | |
| 592 void | |
| 107 | 593 code_rgvar(int e1,int creg) { |
| 109 | 594 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 595 regv[creg]=1; |
| 61 | 596 } |
| 166 | 597 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 598 void |
| 165 | 599 code_crgvar(int e1,int creg,int sign,int sz){ |
| 600 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 601 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 602 regv[creg]=1; |
| 61 | 603 } |
| 604 | |
| 605 | |
| 606 void | |
| 107 | 607 code_lvar(int e2,int creg) { |
| 119 | 608 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 609 regv[creg]=1; |
| 61 | 610 } |
| 611 | |
| 612 | |
| 613 void | |
| 107 | 614 code_register(int e2,int creg) { |
| 61 | 615 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 616 regv[creg]=1; |
| 61 | 617 } |
| 618 | |
| 619 | |
| 620 void | |
| 94 | 621 code_rlvar(int e2,int reg) { |
| 119 | 622 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 623 regv[creg]=1; |
| 61 | 624 } |
| 625 | |
| 626 | |
| 627 void | |
| 165 | 628 code_crlvar(int e2,int reg,int sign,int sz) { |
| 629 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 630 regv[creg]=1; |
| 61 | 631 } |
| 632 | |
| 633 | |
| 634 void | |
| 109 | 635 code_fname(NMTBL *n,int creg) { |
| 636 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 637 regv[creg]=1; |
| 61 | 638 } |
| 639 | |
| 640 | |
| 641 void | |
| 107 | 642 code_const(int e2,int creg) { |
| 61 | 643 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 644 regv[creg]=1; |
| 61 | 645 } |
| 646 | |
| 647 | |
| 648 void | |
| 107 | 649 code_neg(int creg) { |
| 61 | 650 printf("\tnegl %s\n", register_name(creg,0)); |
| 651 } | |
| 652 | |
| 653 | |
| 654 void | |
| 107 | 655 code_not(int creg) { |
| 61 | 656 printf("\tnotl %s\n", register_name(creg,0)); |
| 657 } | |
| 658 | |
| 659 | |
| 660 void | |
| 107 | 661 code_lnot(int creg) { |
| 61 | 662 char *xrn; |
| 663 use_data_reg(creg,1); | |
| 664 xrn = register_name(creg,1); | |
| 665 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 666 printf("\tsete %s\n", xrn); | |
| 667 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 668 } | |
| 669 | |
| 670 void | |
| 168 | 671 code_preinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 672 char *xrn; |
| 673 if (car(e2)==REGISTER) { | |
| 168 | 674 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 675 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 676 regv[reg]=1; | |
| 61 | 677 return; |
| 678 } | |
| 679 g_expr(e2); | |
| 680 xrn = register_name(creg,0); | |
| 168 | 681 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 682 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); | |
| 61 | 683 } |
| 684 | |
| 685 | |
| 686 void | |
| 168 | 687 code_postinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 688 char *xrn; |
| 689 if (car(e2)==REGISTER) { | |
| 107 | 690 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 168 | 691 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 692 regv[reg]=1; |
| 61 | 693 return; |
| 694 } | |
| 695 g_expr(e2); | |
| 696 emit_push(); | |
| 697 xrn = register_name((e2=emit_pop(0)),0); | |
| 165 | 698 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 168 | 699 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 61 | 700 emit_pop_free(e2); |
| 701 } | |
| 702 | |
| 703 | |
| 704 | |
| 705 void | |
| 107 | 706 code_return(int creg) { |
| 61 | 707 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 708 regv[creg]=1; |
| 61 | 709 } |
| 710 | |
| 711 | |
| 712 void | |
| 107 | 713 code_environment(int creg) { |
| 61 | 714 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 715 regv[creg]=1; |
| 61 | 716 } |
| 717 | |
| 718 | |
| 719 void | |
| 116 | 720 code_bool(int e1) { |
| 61 | 721 char *xrn; |
| 722 int e2,e3; | |
| 723 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 724 xrn = register_name(creg,0); | |
| 725 printf("\txorl %s,%s\n",xrn,xrn); | |
| 726 jmp(e3=fwdlabel()); | |
| 727 fwddef(e2); | |
| 728 printf("\tmovl $1,%s\n",xrn); | |
| 729 fwddef(e3); | |
| 107 | 730 regv[creg]=1; |
| 61 | 731 } |
| 732 | |
| 733 char * | |
| 734 code_gt(int cond) { | |
| 735 return (cond?"g":"le"); | |
| 736 } | |
| 737 | |
| 738 char * | |
| 739 code_ugt(int cond) { | |
| 740 return (cond?"a":"be"); | |
| 741 } | |
| 742 | |
| 743 char * | |
| 744 code_ge(int cond) { | |
| 745 return (cond?"ge":"l"); | |
| 746 } | |
| 747 | |
| 748 char * | |
| 749 code_uge(int cond) { | |
| 750 return (cond?"ae":"b"); | |
| 751 } | |
| 752 | |
| 753 char * | |
| 754 code_eq(int cond) { | |
| 755 return (cond?"e":"ne"); | |
| 756 } | |
| 757 | |
| 758 void | |
| 167 | 759 code_cmp_crgvar(int e1,int sz) { |
| 760 if (sz==1) | |
| 761 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 762 else if (sz==size_of_short) | |
| 763 printf("\tcmpw $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 61 | 764 } |
| 765 | |
| 766 | |
| 767 void | |
| 167 | 768 code_cmp_crlvar(int e1,int sz) { |
| 769 if (sz==1) | |
| 770 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); | |
| 771 else if (sz==size_of_short) | |
| 772 printf("\tcmpw $0,%d(%%ebp)\n",lvar(e1)); | |
| 61 | 773 } |
| 774 | |
| 775 | |
| 776 void | |
| 777 code_cmp_rgvar(int e1) { | |
| 109 | 778 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 779 } |
| 780 | |
| 781 | |
| 782 void | |
| 783 code_cmp_rlvar(int e1) { | |
| 119 | 784 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 785 } |
| 786 | |
| 787 | |
| 788 void | |
| 789 code_cmp_register(int e2) { | |
| 790 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 791 } | |
| 792 | |
| 793 | |
| 794 void | |
| 795 ascii(char *s) | |
| 796 { | |
| 797 printf("\t.string \""); | |
| 798 while(*s) { | |
| 799 if (*s=='\n') | |
| 800 printf("%cn",92); | |
| 801 else if (*s<' ') | |
| 802 printf("%c%03o",92,*s); | |
| 803 else if (*s==34) | |
| 804 printf("%c%c",92,34); | |
| 805 else | |
| 806 printf("%c",*s); | |
| 807 s++; | |
| 808 } | |
| 809 printf("%c\n",34); | |
| 810 } | |
| 811 | |
| 812 void | |
| 107 | 813 code_string(int e1,int creg) |
| 61 | 814 { |
| 815 char *s; | |
| 816 int i,lb; | |
| 817 | |
| 818 if (0) { | |
| 819 s=(char *)cadr(e1); | |
| 820 lb=fwdlabel(); | |
| 821 printf("\tjmp _%d\n",lb); | |
| 822 i=backdef(); | |
| 823 ascii(s); | |
| 824 printf("\t.align 2\n"); | |
| 825 fwddef(lb); | |
| 826 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 827 } else { | |
| 828 s=(char *)cadr(e1); | |
| 829 printf(".section\t.rodata\n"); | |
| 830 lb=fwdlabel(); | |
| 831 printf("_%d:\n",lb); | |
| 832 ascii(s); | |
| 833 if (output_mode==TEXT_EMIT_MODE) { | |
| 834 printf(".text\n"); | |
| 835 } else { | |
| 836 text_mode(); | |
| 837 } | |
| 838 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 839 } | |
| 840 } | |
| 841 | |
| 842 #define MAX_COPY_LEN 20 | |
| 843 | |
| 844 void | |
| 845 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 846 { | |
| 847 int fix = 0; | |
| 848 /* length <0 means upward direction copy */ | |
| 849 switch (length) { | |
| 850 case 0: break; | |
| 851 case 1: case -1: | |
| 852 printf("\tmovb %d(%s),%s\n",offset, | |
| 853 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 854 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 855 register_name(to,0)); | |
| 856 break; | |
| 857 case 2: case -2: | |
| 858 printf("\tmovw %d(%s),%s\n",offset, | |
| 859 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 860 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 861 register_name(to,0)); | |
| 862 break; | |
| 863 case 4: case -4: | |
| 864 printf("\tmovl %d(%s),%s\n",offset, | |
| 865 register_name(from,0), register_name(dreg,0)); | |
| 866 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 867 register_name(to,0)); | |
| 868 break; | |
| 869 default: | |
| 870 if (-MAX_COPY_LEN<length && length <0) { | |
| 871 for(;length<=4;length+=4,offset-=4) | |
| 872 emit_copy(from,to,4,offset,0,det); | |
| 873 for(;length<=2;length+=2,offset-=2) | |
| 874 emit_copy(from,to,2,offset,0,det); | |
| 875 if(length>0) | |
| 876 emit_copy(from,to,length,offset,0,det); | |
| 877 break; | |
| 878 } else if (length <=MAX_COPY_LEN) { | |
| 879 for(;length>=4;length-=4,offset+=4) | |
| 880 emit_copy(from,to,4,offset,0,det); | |
| 881 for(;length>=2;length-=2,offset+=2) | |
| 882 emit_copy(from,to,2,offset,0,det); | |
| 883 if(length>0) | |
| 884 emit_copy(from,to,length,offset,0,det); | |
| 885 break; | |
| 886 } | |
| 887 if (det) { | |
| 888 /* | |
| 889 call bcopy | |
| 890 g_expr(list3(FUNCTION,,); | |
| 891 break; | |
| 892 */ | |
| 893 } | |
| 894 use_register(from,REG_ESI,1); | |
| 895 use_register(to, REG_EDI,1); | |
| 896 use_register(dreg,REG_ECX,0); | |
| 897 if (length<0) { | |
| 898 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 899 printf("\taddl $%d,%%esi\n",-length); | |
| 900 printf("\taddl $%d,%%edi\n",-length); | |
| 901 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 902 if(length%4) { | |
| 903 emit_copy(from,to,length,offset+length/4,0,det); | |
| 904 } | |
| 905 } else { | |
| 906 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 907 fix = (length/4)*4; | |
| 908 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 909 if(length%4) { | |
| 910 emit_copy(from,to,length,offset+length/4,0,det); | |
| 911 } | |
| 912 } | |
| 913 } | |
| 914 if (value) { | |
| 915 /* creg must point top of the destination data */ | |
| 916 /* this code is necessary for the value of assignment or function call */ | |
| 917 /* otherwise we don't need this */ | |
| 918 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 919 if(creg!=to) { | |
| 920 if (to==dreg) | |
| 921 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 922 else { | |
| 923 free_register(creg); creg=to; | |
| 924 } | |
| 925 } | |
| 926 } | |
| 927 regv[from]=regv[to]=regv[dreg]=0; | |
| 928 regv[creg]=1; | |
| 929 } | |
| 930 | |
| 931 int | |
| 932 struct_push(int e4,int t) | |
| 933 { | |
| 81 | 934 int length,xreg,save,lreg,count; |
| 61 | 935 g_expr(e4); |
| 936 length=size(t); | |
| 937 if(length%size_of_int) { | |
| 938 length += size_of_int - (length%size_of_int); | |
| 939 } | |
| 81 | 940 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 941 if (length==0) return count; | |
| 942 else { | |
| 943 printf("\tpushl %d(%s)\n", | |
| 944 length-size_of_int,register_name(creg,0)); | |
| 945 } | |
| 61 | 946 } |
| 947 printf("\tsubl $%d,%%esp\n",length); | |
| 948 if (register_full()) { | |
| 949 save = 1; | |
| 950 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 951 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 952 xreg = lreg; regv[xreg]=0; | |
| 953 } else { | |
| 954 save=0; | |
| 955 xreg = get_register(); | |
| 956 } | |
| 957 if (save) | |
| 958 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 959 else | |
| 960 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 961 regv[xreg]=1; | |
| 962 /* downward direction copy */ | |
| 963 emit_copy(creg,xreg,length,0,0,1); | |
| 964 /* we have value in creg, it may be changed */ | |
| 965 if (save) { | |
| 966 if(creg==xreg) { | |
| 967 creg = get_register(); /* creg is freed in emit_copy */ | |
| 968 } | |
| 969 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 970 regv[xreg]=1; | |
| 971 } else | |
| 972 free_register(xreg); | |
| 973 return length/size_of_int; | |
| 974 } | |
| 975 | |
| 94 | 976 int |
| 61 | 977 function(int e1) |
| 978 { | |
| 127 | 979 int e2,e3,e4,nargs,t,ret_type; |
| 980 NMTBL *n=0; | |
| 61 | 981 int save,saved; |
|
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982 ret_type = cadr(cadddr(e1)); |
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983 if (ret_type==CHAR) ret_type=INT; |
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|
984 |
| 94 | 985 #ifdef SAVE_STACKS |
| 986 code_save_stacks(); | |
| 987 #endif | |
| 137 | 988 if (free_register_count(0)<1) { |
| 61 | 989 for(save = 0;save==dreg||save==creg;save++); |
| 990 printf("\tpushl %s\n",register_name(save,0)); | |
| 991 saved = 1; | |
| 992 } else { | |
| 993 save = get_register(); | |
| 994 saved = 0; | |
| 995 } | |
| 996 regv[save]=0; | |
| 997 e2 = cadr(e1); | |
| 998 nargs = 0; | |
| 999 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 1000 t=caddr(e3); | |
| 127 | 1001 e4 = car(e3); |
| 61 | 1002 if(scalar(t)) { |
| 1003 g_expr(e4); | |
| 1004 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1005 } else if (t==DOUBLE) { |
| 1006 g_expr(e4); | |
| 1007 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1008 nargs += size_of_double/size_of_int; |
| 83 | 1009 fregv[freg]=0; |
| 82 | 1010 continue; |
| 1011 } else if (t==FLOAT) { | |
| 1012 g_expr(e4); | |
| 1013 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1014 nargs += size_of_float/size_of_int; |
| 83 | 1015 fregv[freg]=0; |
| 82 | 1016 continue; |
| 61 | 1017 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1018 nargs += struct_push(e4,t); | |
| 1019 continue; | |
| 1020 } else { | |
| 1021 error(TYERR); | |
| 1022 } | |
| 1023 ++nargs; | |
| 1024 } | |
| 1025 if (car(e2) == FNAME) { | |
| 1026 n=(NMTBL *)cadr(e2); | |
| 78 | 1027 regv[creg]=0; |
| 1028 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1029 } else { |
| 1030 g_expr(e2); | |
| 78 | 1031 regv[creg]=1; |
| 1032 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1033 } |
| 1034 | |
| 1035 /* we don't have to save creg nor dreg */ | |
| 1036 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1037 regv[dreg]= regv[save]= 0; |
| 61 | 1038 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1039 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1040 regs[creg]=1; regs[dreg]=1; | |
| 1041 | |
| 1042 if (car(e2) == FNAME) { | |
| 1043 printf("\tcall\t%s\n",n->nm); | |
| 1044 } else { | |
| 1045 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1046 } | |
| 1047 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1048 if (saved) { | |
| 1049 printf("\tpopl %s\n",register_name(save,0)); | |
| 1050 } else { | |
| 1051 free_register(save); | |
| 1052 } | |
| 1053 regv[save]=0; | |
| 105 | 1054 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1055 fregv[freg]=1; regv[creg]=0; |
| 105 | 1056 } else if (ret_type==VOID) { |
| 94 | 1057 fregv[freg]=0; regv[creg]=0; |
| 1058 } else { | |
| 1059 fregv[freg]=0; regv[creg]=1; | |
| 1060 } | |
| 105 | 1061 return ret_type; |
| 61 | 1062 } |
| 1063 | |
| 1064 void | |
| 1065 code_frame_pointer(int e3) { | |
| 1066 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1067 } | |
| 1068 | |
| 1069 | |
| 1070 void | |
| 62 | 1071 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1072 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1073 } | |
| 1074 | |
| 1075 | |
| 1076 void | |
| 1077 code_jmp(char *s) { | |
| 1078 printf("\tjmp %s\n",s); | |
| 1079 } | |
| 1080 | |
| 1081 | |
| 1082 void | |
| 1083 code_indirect_jmp(int e2) { | |
| 1084 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1085 } | |
| 1086 | |
| 94 | 1087 int |
| 196 | 1088 code_rindirect(int e1, int offset, int us) |
| 1089 { | |
| 1090 char *crn,*op; | |
| 1091 int byte; | |
| 1092 g_expr(e1); | |
| 1093 byte = 0; op="movl"; | |
| 1094 crn = register_name(creg,0); | |
| 1095 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1096 return us?UNSIGNED:INT; | |
| 1097 } | |
| 1098 | |
| 1099 int | |
| 1100 code_crindirect(int e1, int offset, int us) | |
| 61 | 1101 { |
| 196 | 1102 char *crn,*op; |
| 1103 int byte; | |
| 1104 g_expr(e1); | |
| 1105 byte = 0; op=us?"movzbl":"movsbl"; | |
| 1106 crn = register_name(creg,0); | |
| 1107 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1108 return us?UCHAR:CHAR; | |
| 1109 } | |
| 1110 | |
| 1111 int | |
| 1112 code_srindirect(int e1, int offset, int us) | |
| 1113 { | |
| 1114 char *crn,*op; | |
| 1115 int byte; | |
| 1116 g_expr(e1); | |
| 1117 byte = 0; op=us?"movzwl":"movswl"; | |
| 1118 crn = register_name(creg,0); | |
| 1119 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1120 return us?USHORT:SHORT; | |
| 1121 } | |
| 1122 | |
| 195 | 1123 #if FLOAT_CODE |
| 196 | 1124 int |
| 1125 code_drindirect(int e1, int offset, int d) | |
| 1126 { | |
| 1127 g_expr(e1); | |
| 1128 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1129 return DOUBLE; | |
| 1130 } | |
| 195 | 1131 #endif |
| 196 | 1132 |
| 1133 #if LONGLONG_CODE | |
| 1134 int | |
| 1135 code_lrindirect(int e1, int offset, int us) | |
| 1136 { | |
| 203 | 1137 return LONGLONG; |
| 61 | 1138 } |
| 196 | 1139 #endif |
| 61 | 1140 |
| 1141 char * | |
| 1142 move(int byte) | |
| 1143 { | |
| 165 | 1144 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1145 } |
| 1146 | |
| 1147 void | |
| 103 | 1148 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1149 if (byte) use_data_reg(creg,1); |
| 109 | 1150 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1151 } |
| 1152 | |
| 1153 void | |
| 103 | 1154 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1155 if (byte) use_data_reg(creg,1); |
| 119 | 1156 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1157 } |
| 1158 | |
| 1159 void | |
| 111 | 1160 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1161 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1162 } | |
| 1163 | |
| 1164 void | |
| 118 | 1165 code_assign(int e2,int byte,int creg) { |
| 95 | 1166 if (byte) use_data_reg(creg,1); |
| 61 | 1167 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1168 regv[creg]=1; |
| 61 | 1169 } |
| 1170 | |
| 1171 void | |
| 1172 code_register_assop(int e2,int op,int byte) { | |
| 1173 int reg; | |
| 1174 int xreg = creg; | |
| 1175 creg = reg = e2; | |
| 1176 tosop(op,xreg); | |
| 1177 creg = xreg; | |
| 1178 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1179 regs[creg]=regv[creg]=1; |
| 61 | 1180 } |
| 1181 | |
| 1182 | |
| 1183 void | |
| 163 | 1184 code_assop(int op,int byte,int sign) { |
| 61 | 1185 char *xrn; |
| 1186 int xreg; | |
| 1187 int edx = edx_setup(); | |
| 1188 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1189 regv[xreg]=regs[xreg]=1; | |
| 1190 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1191 regv[edx]=1; | |
| 163 | 1192 ld_indexx(byte,0,edx,sign); |
| 61 | 1193 tosop(op,xreg); |
| 165 | 1194 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1195 edx_cleanup(); |
| 1196 emit_pop_free(xreg); | |
| 144 | 1197 regv[creg]=1; |
| 61 | 1198 } |
| 1199 | |
| 1200 | |
| 1201 void | |
| 1202 tosop(int op,int oreg) | |
| 1203 { | |
| 1204 int dx; | |
| 1205 char *orn,*crn; | |
| 1206 | |
| 1207 switch(op) { | |
| 1208 case LSHIFT: | |
| 1209 case ULSHIFT: | |
| 1210 shift("sall",oreg); | |
| 144 | 1211 regv[creg]=1; |
| 61 | 1212 return; |
| 1213 case RSHIFT: | |
| 1214 shift("sarl",oreg); | |
| 144 | 1215 regv[creg]=1; |
| 61 | 1216 return; |
| 1217 case URSHIFT: | |
| 1218 shift("shrl",oreg); | |
| 144 | 1219 regv[creg]=1; |
| 61 | 1220 return; |
| 1221 } | |
| 1222 if(oreg==-1) { | |
| 1223 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1224 oreg = dreg; | |
| 1225 regv[dreg]=1; | |
| 94 | 1226 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1227 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1228 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1229 oreg = dreg; |
| 1230 regv[dreg]=1; | |
| 61 | 1231 } |
| 1232 regv[oreg]=1; regs[oreg]=1; | |
| 1233 orn = register_name(oreg,0); | |
| 1234 crn = register_name(creg,0); | |
| 1235 switch(op) { | |
| 1236 case ADD: | |
| 1237 printf("\taddl %s,%s\n",orn,crn); | |
| 1238 break; | |
| 89 | 1239 case SUB: case CMP: |
| 61 | 1240 printf("\tsubl %s,%s\n",orn,crn); |
| 1241 break; | |
| 1242 case BAND: | |
| 1243 printf("\tandl %s,%s\n",orn,crn); | |
| 1244 break; | |
| 1245 case EOR: | |
| 1246 printf("\txorl %s,%s\n",orn,crn); | |
| 1247 break; | |
| 1248 case BOR: | |
| 1249 printf("\torl %s,%s\n",orn,crn); | |
| 1250 break; | |
| 1251 case MUL: | |
| 1252 case UMUL: | |
| 1253 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1254 break; | |
| 1255 case DIV: | |
| 1256 case UDIV: | |
| 1257 use_register(creg,REG_EAX,1); | |
| 1258 edx_setup(); | |
| 1259 orn = register_name(oreg,0); | |
| 1260 if (op==DIV) | |
| 127 | 1261 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1262 else |
| 127 | 1263 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1264 edx_cleanup(); |
| 1265 break; | |
| 1266 case MOD: | |
| 1267 case UMOD: | |
| 1268 use_register(creg,REG_EAX,1); | |
| 1269 edx_setup(); | |
| 1270 orn = register_name(oreg,0); | |
| 1271 if (op==DIV) | |
| 127 | 1272 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1273 else |
| 127 | 1274 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1275 dx = virtual(REG_EDX); |
| 1276 if (dx!=creg) { | |
| 1277 rname[dx]=rname[creg]; | |
| 1278 rname[creg]=REG_EDX; | |
| 1279 } | |
| 1280 edx_cleanup(); | |
| 1281 break; | |
| 1282 } | |
| 159 | 1283 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1284 free_register(oreg); |
| 94 | 1285 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1286 regv[creg]=1; |
| 61 | 1287 } |
| 1288 | |
| 189 | 1289 int |
| 1290 code_const_op_p(int op,int v) | |
| 1291 { | |
| 190 | 1292 if (op==DIV||op==UDIV||op==MOD||op==UMOD) return 0; |
| 189 | 1293 else return 1; |
| 1294 } | |
| 1295 | |
| 1296 void | |
| 1297 oprtc(int op,int orn) | |
| 1298 { | |
| 1299 char *crn = register_name(creg,0); | |
| 1300 | |
| 1301 switch(op) { | |
| 1302 case LSHIFT: | |
| 1303 case ULSHIFT: | |
| 1304 printf("\tsall $%d,%s\n",orn,crn); | |
| 1305 return; | |
| 1306 case RSHIFT: | |
| 1307 printf("\tsarl $%d,%s\n",orn,crn); | |
| 1308 return; | |
| 1309 case URSHIFT: | |
| 1310 printf("\tshrl $%d,%s\n",orn,crn); | |
| 1311 return; | |
| 1312 case ADD: | |
| 1313 printf("\taddl $%d,%s\n",orn,crn); | |
| 1314 break; | |
| 1315 case SUB: case CMP: | |
| 1316 printf("\tsubl $%d,%s\n",orn,crn); | |
| 1317 break; | |
| 1318 case BAND: | |
| 1319 printf("\tandl $%d,%s\n",orn,crn); | |
| 1320 break; | |
| 1321 case EOR: | |
| 1322 printf("\txorl $%d,%s\n",orn,crn); | |
| 1323 break; | |
| 1324 case BOR: | |
| 1325 printf("\torl $%d,%s\n",orn,crn); | |
| 1326 break; | |
| 1327 case MUL: | |
| 1328 case UMUL: | |
| 1329 printf("\t%s $%d,%s\n","imull",orn,crn); | |
| 1330 break; | |
| 1331 default: | |
| 1332 error(-1); | |
| 1333 } | |
| 1334 } | |
| 1335 | |
| 1336 | |
| 61 | 1337 static int edx_stack=0; |
| 1338 | |
| 1339 int | |
| 1340 edx_setup() | |
| 1341 { | |
| 1342 int edx_save; | |
| 1343 /* make real EDX register empty */ | |
| 137 | 1344 if (free_register_count(0)<1) { |
| 61 | 1345 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1346 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1347 edx_stack = list3(edx_save,edx_stack,0); | |
| 1348 } else { | |
| 1349 edx_save = get_register(); | |
| 1350 edx_stack = list3(edx_save,edx_stack,1); | |
| 1351 } | |
| 1352 regv[edx_save]=0; | |
| 1353 use_register(edx_save,REG_EDX,0); | |
| 1354 return edx_save; | |
| 1355 } | |
| 1356 | |
| 1357 | |
| 1358 void | |
| 1359 edx_cleanup() | |
| 1360 { | |
| 1361 if (caddr(edx_stack)==0) { | |
| 1362 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1363 } else | |
| 1364 free_register(car(edx_stack)); | |
| 1365 edx_stack = cadr(edx_stack); | |
| 1366 } | |
| 1367 | |
| 1368 void | |
| 1369 shift(char *op, int reg) | |
| 1370 { | |
| 1371 if (reg>=0) { | |
| 1372 use_register(reg,REG_ECX,1); | |
| 103 | 1373 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1374 use_register(dreg,REG_ECX,0); | |
| 119 | 1375 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1376 reg = dreg; |
| 1377 regv[dreg]=0; | |
| 61 | 1378 } else { |
| 1379 use_register(dreg,REG_ECX,0); | |
| 1380 printf("\tpopl %%ecx\n"); | |
| 103 | 1381 regv[dreg]=0; |
| 61 | 1382 } |
| 1383 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1384 } | |
| 1385 | |
| 1386 void | |
| 163 | 1387 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1388 { |
| 1389 char *op; | |
| 1390 | |
| 166 | 1391 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1392 if (n) |
| 95 | 1393 printf("\t%s %d(%s),%s\n",op,n, |
| 1394 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1395 else |
| 95 | 1396 printf("\t%s (%s),%s\n",op, |
| 1397 register_name(xreg,0),register_name(creg,byte)); | |
| 1398 } | |
| 1399 | |
| 1400 int | |
| 1401 code_csvalue() | |
| 1402 { | |
| 123 | 1403 return rname[creg]; /* for switch value */ |
| 61 | 1404 } |
| 1405 | |
| 1406 void | |
| 95 | 1407 code_cmpdimm(int e, int csreg) |
| 61 | 1408 { |
| 1409 /* used in dosiwtch() */ | |
| 66 | 1410 if(chk) return; |
| 123 | 1411 use_register(creg,csreg,0); |
| 61 | 1412 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1413 } | |
| 1414 | |
| 1415 void | |
| 66 | 1416 code_opening(char *filename) |
| 61 | 1417 { |
| 1418 printf("\t.file \"%s\"\n",filename); | |
| 1419 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1420 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1421 printf(".text\n"); |
| 1422 } | |
| 1423 | |
| 1424 void | |
| 66 | 1425 code_closing() |
| 61 | 1426 { |
| 78 | 1427 global_table(); |
| 61 | 1428 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1429 } | |
| 1430 | |
| 1431 void | |
| 89 | 1432 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1433 { |
| 89 | 1434 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1435 printf("\tj%s\t_%d\n",s,l1); |
| 1436 } | |
| 1437 | |
| 82 | 1438 |
| 1439 void | |
| 61 | 1440 jcond(int l, char cond) |
| 1441 { | |
| 66 | 1442 if (chk) return; |
| 61 | 1443 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1444 } | |
| 1445 | |
| 1446 void | |
| 1447 jmp(int l) | |
| 1448 { | |
| 1449 control=0; | |
| 66 | 1450 if (chk) return; |
| 61 | 1451 printf("\tjmp\t_%d\n",l); |
| 1452 /* align? */ | |
| 1453 /* | |
| 1454 this is not allowed because of ? operator | |
| 1455 regv[creg]=regv[dreg]=0; | |
| 1456 use_register(creg,REG_EAX,0); | |
| 1457 use_register(dreg,REG_EBX,0); | |
| 1458 */ | |
| 1459 } | |
| 1460 | |
| 1461 void | |
| 1462 gen_comment(char *s) | |
| 1463 { | |
| 66 | 1464 if (chk) return; |
| 1465 printf("## %s",s); | |
| 61 | 1466 } |
| 1467 | |
| 1468 | |
| 1469 void | |
| 1470 code_enter(char *name) | |
| 1471 { | |
| 1472 printf("\t.align 4\n"); | |
| 1473 if (stmode!=STATIC) | |
| 1474 printf(".globl %s\n",name); | |
| 1475 printf("\t.type\t%s,@function\n",name); | |
| 1476 printf("%s:\n",name); | |
| 1477 } | |
| 1478 | |
| 77 | 1479 |
| 61 | 1480 void |
| 1481 code_enter1(int args) | |
| 1482 { | |
| 1483 code_disp_label=fwdlabel(); | |
| 1484 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1485 | |
| 1486 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1487 } | |
| 1488 | |
| 1489 void | |
| 1490 code_leave(char *name) | |
| 1491 { | |
| 63 | 1492 disp&= -size_of_int; |
| 61 | 1493 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1494 printf("_%d:\n",labelno); | |
| 1495 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1496 local_table(); | |
| 1497 labelno++; | |
| 1498 free_all_register(); | |
| 1499 } | |
| 1500 | |
| 1501 void | |
| 1502 enter(char *name) | |
| 1503 { | |
| 1504 printf("\t.align 2\n"); | |
| 1505 if (stmode!=STATIC) | |
| 1506 printf(".globl %s\n",name); | |
| 1507 printf("%s:\n",name); | |
| 1508 printf("\t.type\t%s,@function\n",name); | |
| 1509 printf("\tpushl %%ebp\n"); | |
| 1510 printf("\tmovl %%esp,%%ebp\n"); | |
| 1511 printf("\tpushl %%ebx\n"); | |
| 1512 printf("\tpushl %%esi\n"); | |
| 1513 printf("\tpushl %%edi\n"); | |
| 1514 } | |
| 1515 | |
| 1516 void | |
| 1517 enter1() | |
| 1518 { | |
| 182 | 1519 text_mode(); |
| 61 | 1520 func_disp_label=fwdlabel(); |
| 1521 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1522 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1523 } | |
| 1524 | |
| 1525 void | |
| 1526 leave(int control, char *name) | |
| 1527 { | |
| 128 | 1528 int sz; |
| 1529 | |
| 1530 disp &= -size_of_int; | |
| 61 | 1531 if (control) |
| 108 | 1532 code_set_return_register(1); |
| 61 | 1533 if (retcont) { |
| 1534 if (control) | |
| 1535 jmp(retlabel); | |
| 1536 fwddef(retcont); | |
| 128 | 1537 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1538 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1539 } else if (cadr(fnptr->ty)>0&&( | |
| 1540 car(cadr(fnptr->ty))==STRUCT || | |
| 1541 car(cadr(fnptr->ty))==UNION)) { | |
| 1542 sz = size(cadr(fnptr->ty)); | |
| 1543 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1544 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1545 register_name(creg,0)); | |
| 1546 emit_copy(dreg,creg,sz,0,1,1); | |
| 1547 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1548 use_register(creg,REG_EAX,0); | |
| 1549 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1550 } | |
| 61 | 1551 } |
| 1552 fwddef(retlabel); | |
| 63 | 1553 |
| 61 | 1554 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1555 printf("\tpopl %%edi\n"); | |
| 1556 printf("\tpopl %%esi\n"); | |
| 1557 printf("\tpopl %%ebx\n"); | |
| 1558 printf("\tleave\n"); | |
| 1559 printf("\tret\n"); | |
| 1560 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1561 printf("_%d:\n",labelno); | |
| 1562 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1563 local_table(); | |
| 1564 labelno++; | |
| 1565 free_all_register(); | |
| 1566 } | |
| 1567 | |
| 187 | 1568 int |
| 1569 code_get_fixed_creg(int reg,int type) { | |
| 1570 if (type==FLOAT||type==DOUBLE) { | |
| 1571 return 0; | |
| 1572 } else { | |
| 1573 return rname[reg]; | |
| 1574 } | |
| 1575 } | |
| 61 | 1576 |
| 1577 void | |
| 187 | 1578 code_set_fixed_creg(int reg,int mode,int type) { |
| 108 | 1579 if (type==FLOAT||type==DOUBLE) { |
| 187 | 1580 } else { |
| 1581 use_register(creg,reg,mode); | |
| 1582 } | |
| 61 | 1583 } |
| 1584 | |
| 1585 void | |
| 107 | 1586 code_set_return_register(int mode) { |
| 1587 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1588 } else { | |
| 1589 use_register(creg,REG_EAX,mode); | |
| 1590 } | |
| 1591 } | |
| 1592 | |
| 1593 void | |
| 61 | 1594 gen_gdecl(char *n, int gpc) |
| 1595 { | |
| 1596 /* | |
| 1597 if (stmode!=STATIC) | |
| 1598 printf(".globl %s\n",n); | |
| 1599 */ | |
| 1600 } | |
| 1601 | |
| 1602 void | |
| 1603 align(int t) | |
| 1604 { | |
| 1605 if (t!=CHAR) { | |
| 1606 if (data_alignment & 1) | |
| 1607 printf("\t.align 2\n"); | |
| 1608 data_alignment = 0; | |
| 1609 } | |
| 1610 } | |
| 1611 | |
| 1612 void | |
| 1613 emit_data(int e, int t, NMTBL *n) | |
| 1614 { | |
| 1615 int l; | |
| 195 | 1616 #if FLOAT_CODE |
| 82 | 1617 double d; |
| 1618 float f; | |
| 195 | 1619 #endif |
| 61 | 1620 char *name; |
| 1621 name = n->nm; | |
| 156 | 1622 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1623 error(-1); return; |
| 1624 } | |
| 66 | 1625 if (chk) return; |
| 61 | 1626 if (n->dsp != -1) { |
| 1627 n->dsp = -1; /* initiallized flag */ | |
| 1628 printf(".globl\t%s\n",name); | |
| 1629 data_mode(name); | |
| 1630 align(t); | |
| 1631 printf("%s:\n",name); | |
| 1632 } else { | |
| 1633 data_mode(0); | |
| 1634 } | |
| 1635 if(car(e)==CONST) { | |
| 168 | 1636 if (t==CHAR||t==UCHAR) { |
| 61 | 1637 printf("\t.byte %d\n",cadr(e)); |
| 1638 if (data_alignment>0) | |
| 1639 data_alignment++; | |
| 1640 gpc += 1; | |
| 168 | 1641 } else if (t==SHORT||t==USHORT) { |
| 1642 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1643 if (data_alignment>0) data_alignment++; |
| 168 | 1644 gpc += size_of_short; |
| 61 | 1645 } else { |
| 1646 printf("\t.long %d\n",cadr(e)); | |
| 1647 gpc += size_of_int; | |
| 1648 } | |
| 195 | 1649 #if FLOAT_CODE |
| 82 | 1650 } else if(t==DOUBLE) { |
| 1651 d = dcadr(e); | |
| 1652 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1653 } else if(t==FLOAT) { | |
| 1654 f = dcadr(e); | |
| 1655 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 195 | 1656 #endif |
| 61 | 1657 } else if(t!=CHAR) { |
| 1658 gpc += size_of_int; | |
| 1659 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1660 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1661 } else if(car(e)==GVAR) { | |
| 1662 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1663 } else if(car(e)==FNAME) { |
| 1664 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1665 } else if(car(e)==STRING) { | |
| 1666 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1667 l = fwdlabel(); | |
| 1668 printf("\t.long _%d\n",l); | |
| 1669 printf(".section\t.rodata\n"); | |
| 1670 printf("_%d:\n",l); | |
| 1671 output_mode = RODATA_EMIT_MODE; | |
| 1672 } | |
| 1673 ascii((char *)cadr(e)); | |
| 1674 } else error(TYERR); | |
| 168 | 1675 } else error(TYERR); |
| 61 | 1676 } |
| 1677 | |
| 1678 void | |
| 1679 emit_data_closing(NMTBL *n) | |
| 1680 { | |
| 1681 int lb; | |
| 66 | 1682 if (chk) return; |
| 61 | 1683 if (mode==GDECL) { |
| 1684 data_mode(0); | |
| 1685 lb=fwdlabel(); | |
| 1686 printf("_%d:\n",lb); | |
| 1687 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1688 } | |
| 1689 } | |
| 1690 | |
| 1691 void | |
| 1692 global_table(void) | |
| 1693 { | |
| 1694 NMTBL *n; | |
| 1695 int init; | |
| 1696 init=0; | |
| 1697 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1698 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1699 /* n->dsp = -1 means initialized global */ |
| 1700 if (init==0) { | |
| 1701 data_mode(0); | |
| 1702 init=1; | |
| 1703 } | |
| 1704 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1705 } | |
| 1706 } | |
| 1707 } | |
| 1708 | |
| 1709 void | |
| 1710 local_table(void) | |
| 1711 { | |
| 1712 NMTBL *n; | |
| 1713 int init; | |
| 1714 init=0; | |
| 1715 /* static local variables */ | |
| 1716 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1717 if (n->sc == GVAR) { | |
| 1718 if (init==0) { | |
| 1719 data_mode(0); | |
| 1720 init=1; | |
| 1721 } | |
| 156 | 1722 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1723 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1724 } |
| 1725 } | |
| 1726 } | |
| 1727 | |
| 1728 void | |
| 1729 text_mode(void) | |
| 1730 { | |
| 1731 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1732 printf(".text\n"); | |
| 1733 printf("\t.align 2\n"); | |
| 1734 output_mode = TEXT_EMIT_MODE; | |
| 1735 } | |
| 1736 } | |
| 1737 | |
| 1738 void | |
| 1739 data_mode(char *name) | |
| 1740 { | |
| 1741 if (output_mode!=DATA_EMIT_MODE) { | |
| 1742 printf(".data\n"); | |
| 1743 output_mode = DATA_EMIT_MODE; | |
| 1744 } | |
| 1745 if (name) | |
| 1746 printf("\t.type\t%s,@object\n",name); | |
| 1747 } | |
| 1748 | |
| 195 | 1749 #if FLOAT_CODE |
| 1750 | |
| 81 | 1751 /* floating point */ |
| 1752 | |
| 1753 | |
| 82 | 1754 char * |
| 1755 fstore(int d) | |
| 1756 { | |
| 83 | 1757 return use? |
| 1758 (d?"fstl":"fsts"): | |
| 1759 (d?"fstpl":"fstps") | |
| 1760 ; | |
| 1761 } | |
| 1762 | |
| 1763 char * | |
| 1764 fstore_u(int d) | |
| 1765 { | |
| 82 | 1766 return d?"fstpl":"fstps"; |
| 1767 } | |
| 81 | 1768 |
| 82 | 1769 char * |
| 1770 fload(int d) | |
| 1771 { | |
| 1772 return d?"fldl":"flds"; | |
| 1773 } | |
| 81 | 1774 |
| 1775 | |
| 103 | 1776 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1777 { |
| 109 | 1778 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1779 } |
| 1780 | |
| 103 | 1781 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1782 { |
| 119 | 1783 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1784 } |
| 1785 | |
| 138 | 1786 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1787 { |
| 1788 error(-1); | |
| 1789 } | |
| 1790 | |
| 103 | 1791 void code_dassign(int e2,int freg,int d) |
| 82 | 1792 { |
| 1793 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1794 } | |
| 1795 | |
| 1796 static double d0 = 1.0; | |
| 81 | 1797 |
| 82 | 1798 int |
| 1799 code_d1(double d) | |
| 1800 { | |
| 1801 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1802 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1803 } | |
| 1804 | |
| 1805 int | |
| 1806 code_d2(double d) | |
| 1807 { | |
| 1808 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1809 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1810 } | |
| 1811 | |
| 138 | 1812 void code_dconst(int e2,int freg,int d) |
| 82 | 1813 { |
| 1814 int lb; | |
| 138 | 1815 double value = dcadr(e2); |
| 81 | 1816 |
| 138 | 1817 if (value==0.0) { |
| 82 | 1818 printf("\tfldz\n"); return; |
| 1819 } | |
| 138 | 1820 if (value==1.0) { |
| 82 | 1821 printf("\tfld1\n"); return; |
| 1822 } | |
| 1823 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1824 lb=fwdlabel(); | |
| 1825 printf("_%d:\n",lb); | |
| 138 | 1826 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1827 if (output_mode==TEXT_EMIT_MODE) { |
| 1828 printf(".text\n"); | |
| 1829 } else { | |
| 1830 text_mode(); | |
| 1831 } | |
| 1832 printf("\tfldl _%d\n",lb); | |
| 1833 } | |
| 1834 | |
| 138 | 1835 void code_dneg(int freg,int d) |
| 82 | 1836 { |
| 1837 printf("\tfchs\n"); | |
| 1838 } | |
| 81 | 1839 |
| 147 | 1840 void code_d2i(int freg) |
| 82 | 1841 { |
| 1842 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1843 printf("\tfnstcw (%%esp)\n"); | |
| 1844 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1845 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1846 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1847 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1848 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1849 printf("\tfldcw (%%esp)\n"); |
| 82 | 1850 printf("\tpopl %s\n",register_name(creg,0)); |
| 1851 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1852 } | |
| 81 | 1853 |
| 147 | 1854 void code_i2d(int creg) |
| 82 | 1855 { |
| 1856 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1857 printf("\tfildl (%%esp)\n"); | |
| 1858 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1859 } | |
| 1860 | |
| 147 | 1861 void code_d2u(int freg) |
| 85 | 1862 { |
| 86 | 1863 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1864 printf("\tfnstcw (%%esp)\n"); |
| 1865 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1866 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1867 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1868 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1869 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1870 printf("\tfldcw (%%esp)\n"); |
| 86 | 1871 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1872 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1873 } |
| 1874 | |
| 147 | 1875 void code_u2d(int creg) |
| 85 | 1876 { |
| 86 | 1877 printf("\tpushl %s\n",register_name(creg,0)); |
| 1878 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1879 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1880 printf("\tfildll (%%esp)\n"); | |
| 1881 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1882 } |
| 1883 | |
| 133 | 1884 void code_d2f(int freg) { } |
| 1885 void code_f2d(int freg) { } | |
| 147 | 1886 void code_f2i(int freg) { code_d2i(freg); } |
| 1887 void code_f2u(int freg) { code_d2u(freg); } | |
| 1888 void code_i2f(int creg) { code_i2d(creg); } | |
| 1889 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1890 |
| 107 | 1891 void code_drgvar(int e2,int d,int freg) |
| 82 | 1892 { |
| 109 | 1893 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1894 } |
| 81 | 1895 |
| 1896 | |
| 107 | 1897 void code_drlvar(int e2,int d,int freg) |
| 82 | 1898 { |
| 119 | 1899 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1900 } |
| 1901 | |
| 138 | 1902 void code_cmp_drgvar(int e2,int d) |
| 82 | 1903 { |
| 109 | 1904 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1905 } |
| 1906 | |
| 138 | 1907 void code_cmp_drlvar(int e2,int d) |
| 82 | 1908 { |
| 119 | 1909 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1910 } |
| 1911 | |
| 1912 void dtosop(int op,int e1) | |
| 94 | 1913 { |
| 82 | 1914 switch(op) { |
| 133 | 1915 case FADD: |
| 82 | 1916 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1917 case FSUB: |
| 85 | 1918 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1919 case FDIV: |
| 85 | 1920 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1921 case FMUL: |
| 82 | 1922 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1923 case FCMP: |
| 89 | 1924 case DCMP: |
| 82 | 1925 printf("\tfucompp\n"); |
| 1926 printf("\tfnstsw\t%%ax\n"); | |
| 1927 break; | |
| 1928 } | |
| 1929 } | |
| 81 | 1930 |
| 83 | 1931 void |
| 1932 code_dassop(int op,int d) { | |
| 1933 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1934 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1935 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1936 dtosop(op,0); | |
| 1937 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1938 } | |
| 1939 | |
| 1940 void | |
| 107 | 1941 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1942 g_expr(e2); |
| 1943 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1944 printf("\tfld1\n"); | |
| 87 | 1945 if (caddr(e1)>0) |
| 83 | 1946 printf("\tfaddp %%st,%%st(1)\n"); |
| 1947 else | |
| 1948 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1949 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1950 } | |
| 1951 | |
| 1952 void | |
| 107 | 1953 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1954 g_expr(e2); |
| 1955 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1956 if (use) | |
| 86 | 1957 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1958 printf("\tfld1\n"); |
| 87 | 1959 if (caddr(e1)>0) |
| 83 | 1960 printf("\tfaddp %%st,%%st(1)\n"); |
| 1961 else | |
| 1962 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1963 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1964 } |
| 1965 | |
| 84 | 1966 void |
| 1967 drexpr(int e1, int e2,int l1, int op) | |
| 1968 { | |
| 89 | 1969 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1970 switch(op) { |
| 1971 case DOP+GE: | |
| 133 | 1972 case FOP+GE: |
| 84 | 1973 printf("\ttestb\t$5,%%ah\n"); |
| 1974 printf("\tjne\t_%d\n",l1); | |
| 1975 break; | |
| 1976 case DOP+GT: | |
| 133 | 1977 case FOP+GT: |
| 84 | 1978 printf("\ttestb\t$69,%%ah\n"); |
| 1979 printf("\tjne\t_%d\n",l1); | |
| 1980 break; | |
| 1981 case DOP+EQ: | |
| 133 | 1982 case FOP+EQ: |
| 84 | 1983 printf("\tandb\t$69,%%ah\n"); |
| 1984 printf("\txorb\t$64,%%ah\n"); | |
| 1985 printf("\tjne\t_%d\n",l1); | |
| 1986 break; | |
| 1987 case DOP+NEQ: | |
| 133 | 1988 case FOP+NEQ: |
| 84 | 1989 printf("\tandb\t$69,%%ah\n"); |
| 1990 printf("\txorb\t$64,%%ah\n"); | |
| 1991 printf("\tje\t_%d\n",l1); | |
| 1992 break; | |
| 1993 } | |
| 1994 } | |
| 1995 | |
| 94 | 1996 void |
| 138 | 1997 code_dregister(int e2,int freg,int d) |
| 94 | 1998 { |
| 1999 error(-1); | |
| 2000 } | |
| 2001 | |
| 138 | 2002 void |
| 2003 code_cmp_dregister(int e2,int d) | |
| 94 | 2004 { |
| 2005 error(-1); | |
| 82 | 2006 } |
| 81 | 2007 |
| 97 | 2008 int pop_fregister() |
| 82 | 2009 { |
| 94 | 2010 if (freg_sp<0) { error(-1); return -1;} |
| 2011 printf("# fpop: %d\n",freg_sp-1); | |
| 2012 return freg_stack[--freg_sp]; | |
| 82 | 2013 } |
| 81 | 2014 |
| 94 | 2015 int |
| 138 | 2016 emit_dpop(int d) |
| 94 | 2017 { |
| 2018 int xreg; | |
| 97 | 2019 if ((xreg=pop_fregister())==-1) { |
| 94 | 2020 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 2021 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 2022 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 2023 /* pushed order is reversed. We don't need this for comutable |
| 2024 operator, but it is ok to do this. */ | |
| 2025 printf("\tfxch\t%%st(1)\n"); | |
| 2026 } | |
| 2027 return xreg; | |
| 2028 } | |
| 2029 | |
| 2030 | |
| 138 | 2031 void emit_dpop_free(int e1,int d) |
| 82 | 2032 { |
| 2033 } | |
| 81 | 2034 |
| 133 | 2035 void emit_dpush(int type) |
| 82 | 2036 { |
| 119 | 2037 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 2038 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 2039 freg_stack[freg_sp++]=-1; |
| 94 | 2040 printf("# fpush:%d\n",freg_sp); |
| 2041 } | |
| 2042 | |
| 195 | 2043 #endif |
| 2044 | |
| 94 | 2045 void |
| 2046 code_save_stacks() | |
| 2047 { | |
| 2048 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 2049 int xreg,sp,screg; | |
| 2050 sp=reg_sp; | |
| 2051 while(sp-->0) { | |
| 2052 if ((xreg=reg_stack[sp])>=0) { | |
| 2053 screg=creg; | |
| 2054 if(creg!=xreg) { | |
| 2055 if (xreg!=dreg) free_register(xreg); | |
| 2056 creg = xreg; | |
| 2057 } | |
| 2058 code_assign_lvar( | |
| 119 | 2059 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 2060 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 2061 regv[xreg]=0; | |
| 2062 creg=screg; | |
| 2063 } | |
| 2064 } | |
| 195 | 2065 #if FLOAT_CODE |
| 107 | 2066 code_save_fstacks(); |
| 195 | 2067 #endif |
| 107 | 2068 } |
| 2069 | |
| 195 | 2070 #if FLOAT_CODE |
| 107 | 2071 void |
| 2072 code_save_fstacks() | |
| 2073 { | |
| 127 | 2074 int xreg,sp,uses; |
| 2075 uses = use; use = 0; | |
| 94 | 2076 sp=freg_sp; |
| 2077 while(sp-->0) { | |
| 2078 if ((xreg=freg_stack[sp])==-1) { | |
| 2079 code_dassign_lvar( | |
| 119 | 2080 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 2081 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 2082 } | |
| 2083 } | |
| 127 | 2084 use = uses; |
| 82 | 2085 } |
| 195 | 2086 #endif |
| 2087 | |
| 2088 | |
| 2089 | |
| 2090 #if LONGLONG_CODE | |
| 2091 | |
| 2092 | |
| 2093 /* 64bit int part */ | |
| 2094 | |
| 2095 void lrexpr(int e1, int e2,int l1, int op) | |
| 2096 { | |
| 2097 } | |
| 2098 | |
| 2099 int lpop_register() | |
| 2100 { | |
| 2101 return 0; | |
| 2102 } | |
| 2103 | |
| 2104 int emit_lpop() | |
| 2105 { | |
| 2106 return 0; | |
| 2107 } | |
| 2108 | |
| 2109 void code_lregister(int e2,int reg) | |
| 2110 { | |
| 2111 | |
| 2112 } | |
| 2113 | |
| 2114 void code_cmp_lregister(int reg) | |
| 2115 { | |
| 2116 | |
| 2117 } | |
| 2118 | |
| 2119 void code_cmp_lrgvar(int e1,int e2) | |
| 2120 { | |
| 2121 | |
| 2122 } | |
| 2123 | |
| 2124 void code_cmp_lrlvar(int e1,int e2) | |
| 2125 { | |
| 2126 | |
| 2127 } | |
| 2128 | |
| 2129 void code_lassign(int e1,int e2) | |
| 2130 { | |
| 2131 | |
| 2132 } | |
| 2133 | |
| 2134 void code_lassign_gvar(int e1,int e2) | |
| 2135 { | |
| 2136 | |
| 2137 } | |
| 2138 | |
| 2139 void code_lassign_lvar(int e1,int e2) | |
| 2140 { | |
| 2141 | |
| 2142 } | |
| 2143 | |
| 2144 void code_lassign_lregister(int e2,int reg) | |
| 2145 { | |
| 2146 | |
| 2147 } | |
| 2148 | |
| 2149 void code_lconst(int e1,int e2) | |
| 2150 { | |
| 2151 | |
| 2152 } | |
| 2153 | |
| 2154 void code_lneg(int e1,int e2) | |
| 2155 { | |
| 2156 | |
| 2157 } | |
| 2158 | |
| 2159 void code_lrgvar(int e1,int e2) | |
| 2160 { | |
| 2161 | |
| 2162 } | |
| 2163 | |
| 2164 void code_lrlvar(int e1,int e2) | |
| 2165 { | |
| 2166 | |
| 2167 } | |
| 2168 | |
| 2169 void ltosop(int e1,int e2) | |
| 2170 { | |
| 2171 | |
| 2172 } | |
| 2173 | |
| 2174 void emit_lpop_free(int e1) | |
| 2175 { | |
| 2176 | |
| 2177 } | |
| 2178 | |
| 2179 void emit_lpush() | |
| 2180 { | |
| 2181 | |
| 2182 } | |
| 2183 | |
| 2184 void code_i2ll(int creg) | |
| 2185 { | |
| 2186 | |
| 2187 } | |
| 2188 | |
| 2189 void code_i2ull(int creg) | |
| 2190 { | |
| 2191 | |
| 2192 } | |
| 2193 | |
| 2194 void code_u2ll(int creg) | |
| 2195 { | |
| 2196 | |
| 2197 } | |
| 2198 | |
| 2199 void code_u2ull(int creg) | |
| 2200 { | |
| 2201 | |
| 2202 } | |
| 2203 | |
| 2204 void code_ll2i(int creg) | |
| 2205 { | |
| 2206 | |
| 2207 } | |
| 2208 | |
| 2209 void code_ll2u(int creg) | |
| 2210 { | |
| 2211 | |
| 2212 } | |
| 2213 | |
| 2214 void code_ull2i(int creg) | |
| 2215 { | |
| 2216 | |
| 2217 } | |
| 2218 | |
| 2219 void code_ull2u(int creg) | |
| 2220 { | |
| 2221 | |
| 2222 } | |
| 2223 | |
| 2224 #if FLOAT_CODE | |
| 2225 void code_d2ll(int creg) | |
| 2226 { | |
| 2227 | |
| 2228 } | |
| 2229 | |
| 2230 void code_d2ull(int creg) | |
| 2231 { | |
| 2232 | |
| 2233 } | |
| 2234 | |
| 2235 void code_f2ll(int creg) | |
| 2236 { | |
| 2237 | |
| 2238 } | |
| 2239 | |
| 2240 void code_f2ull(int creg) | |
| 2241 { | |
| 2242 | |
| 2243 } | |
| 2244 | |
| 2245 void code_ll2d(int creg) | |
| 2246 { | |
| 2247 | |
| 2248 } | |
| 2249 | |
| 2250 void code_ll2f(int creg) | |
| 2251 { | |
| 2252 | |
| 2253 } | |
| 2254 | |
| 2255 void code_ull2d(int creg) | |
| 2256 { | |
| 2257 | |
| 2258 } | |
| 2259 | |
| 2260 void code_ull2f(int creg) | |
| 2261 { | |
| 2262 | |
| 2263 } | |
| 2264 | |
| 2265 void code_ull2ll(int creg) | |
| 2266 { | |
| 2267 | |
| 2268 } | |
| 2269 | |
| 2270 void code_ull2ull(int creg) | |
| 2271 { | |
| 2272 | |
| 2273 } | |
| 2274 | |
| 2275 #endif | |
| 2276 | |
| 2277 | |
| 2278 void code_lpreinc(int e1,int e2,int reg) | |
| 2279 { | |
| 2280 | |
| 2281 } | |
| 2282 | |
| 2283 void code_lpostinc(int e1,int e2,int reg) | |
| 2284 { | |
| 2285 | |
| 2286 } | |
| 2287 | |
| 2288 void code_lassop(int op) | |
| 2289 { | |
| 2290 | |
| 2291 } | |
| 2292 | |
| 2293 | |
| 2294 #endif | |
| 81 | 2295 |
| 61 | 2296 /* end */ |
| 195 | 2297 |