Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 189:f53d70110377
immediate instructions.
| author | kono |
|---|---|
| date | Mon, 01 Dec 2003 21:18:45 +0900 |
| parents | dffcccf8b1cb |
| children | 1b1c58483e67 |
| 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 | |
| 189 | 1257 int |
| 1258 code_const_op_p(int op,int v) | |
| 1259 { | |
| 1260 if (DIV||UDIV||MOD||UMOD) return 0; | |
| 1261 else return 1; | |
| 1262 } | |
| 1263 | |
| 1264 void | |
| 1265 oprtc(int op,int orn) | |
| 1266 { | |
| 1267 char *crn = register_name(creg,0); | |
| 1268 | |
| 1269 switch(op) { | |
| 1270 case LSHIFT: | |
| 1271 case ULSHIFT: | |
| 1272 printf("\tsall $%d,%s\n",orn,crn); | |
| 1273 return; | |
| 1274 case RSHIFT: | |
| 1275 printf("\tsarl $%d,%s\n",orn,crn); | |
| 1276 return; | |
| 1277 case URSHIFT: | |
| 1278 printf("\tshrl $%d,%s\n",orn,crn); | |
| 1279 return; | |
| 1280 case ADD: | |
| 1281 printf("\taddl $%d,%s\n",orn,crn); | |
| 1282 break; | |
| 1283 case SUB: case CMP: | |
| 1284 printf("\tsubl $%d,%s\n",orn,crn); | |
| 1285 break; | |
| 1286 case BAND: | |
| 1287 printf("\tandl $%d,%s\n",orn,crn); | |
| 1288 break; | |
| 1289 case EOR: | |
| 1290 printf("\txorl $%d,%s\n",orn,crn); | |
| 1291 break; | |
| 1292 case BOR: | |
| 1293 printf("\torl $%d,%s\n",orn,crn); | |
| 1294 break; | |
| 1295 case MUL: | |
| 1296 case UMUL: | |
| 1297 printf("\t%s $%d,%s\n","imull",orn,crn); | |
| 1298 break; | |
| 1299 default: | |
| 1300 error(-1); | |
| 1301 } | |
| 1302 } | |
| 1303 | |
| 1304 | |
| 61 | 1305 static int edx_stack=0; |
| 1306 | |
| 1307 int | |
| 1308 edx_setup() | |
| 1309 { | |
| 1310 int edx_save; | |
| 1311 /* make real EDX register empty */ | |
| 137 | 1312 if (free_register_count(0)<1) { |
| 61 | 1313 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1314 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1315 edx_stack = list3(edx_save,edx_stack,0); | |
| 1316 } else { | |
| 1317 edx_save = get_register(); | |
| 1318 edx_stack = list3(edx_save,edx_stack,1); | |
| 1319 } | |
| 1320 regv[edx_save]=0; | |
| 1321 use_register(edx_save,REG_EDX,0); | |
| 1322 return edx_save; | |
| 1323 } | |
| 1324 | |
| 1325 | |
| 1326 void | |
| 1327 edx_cleanup() | |
| 1328 { | |
| 1329 if (caddr(edx_stack)==0) { | |
| 1330 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1331 } else | |
| 1332 free_register(car(edx_stack)); | |
| 1333 edx_stack = cadr(edx_stack); | |
| 1334 } | |
| 1335 | |
| 1336 void | |
| 1337 shift(char *op, int reg) | |
| 1338 { | |
| 1339 if (reg>=0) { | |
| 1340 use_register(reg,REG_ECX,1); | |
| 103 | 1341 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1342 use_register(dreg,REG_ECX,0); | |
| 119 | 1343 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1344 reg = dreg; |
| 1345 regv[dreg]=0; | |
| 61 | 1346 } else { |
| 1347 use_register(dreg,REG_ECX,0); | |
| 1348 printf("\tpopl %%ecx\n"); | |
| 103 | 1349 regv[dreg]=0; |
| 61 | 1350 } |
| 1351 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1352 } | |
| 1353 | |
| 1354 void | |
| 163 | 1355 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1356 { |
| 1357 char *op; | |
| 1358 | |
| 166 | 1359 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1360 if (n) |
| 95 | 1361 printf("\t%s %d(%s),%s\n",op,n, |
| 1362 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1363 else |
| 95 | 1364 printf("\t%s (%s),%s\n",op, |
| 1365 register_name(xreg,0),register_name(creg,byte)); | |
| 1366 } | |
| 1367 | |
| 1368 int | |
| 1369 code_csvalue() | |
| 1370 { | |
| 123 | 1371 return rname[creg]; /* for switch value */ |
| 61 | 1372 } |
| 1373 | |
| 1374 void | |
| 95 | 1375 code_cmpdimm(int e, int csreg) |
| 61 | 1376 { |
| 1377 /* used in dosiwtch() */ | |
| 66 | 1378 if(chk) return; |
| 123 | 1379 use_register(creg,csreg,0); |
| 61 | 1380 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1381 } | |
| 1382 | |
| 1383 void | |
| 66 | 1384 code_opening(char *filename) |
| 61 | 1385 { |
| 1386 printf("\t.file \"%s\"\n",filename); | |
| 1387 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1388 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1389 printf(".text\n"); |
| 1390 } | |
| 1391 | |
| 1392 void | |
| 66 | 1393 code_closing() |
| 61 | 1394 { |
| 78 | 1395 global_table(); |
| 61 | 1396 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1397 } | |
| 1398 | |
| 1399 void | |
| 89 | 1400 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1401 { |
| 89 | 1402 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1403 printf("\tj%s\t_%d\n",s,l1); |
| 1404 } | |
| 1405 | |
| 82 | 1406 |
| 1407 void | |
| 61 | 1408 jcond(int l, char cond) |
| 1409 { | |
| 66 | 1410 if (chk) return; |
| 61 | 1411 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1412 } | |
| 1413 | |
| 1414 void | |
| 1415 jmp(int l) | |
| 1416 { | |
| 1417 control=0; | |
| 66 | 1418 if (chk) return; |
| 61 | 1419 printf("\tjmp\t_%d\n",l); |
| 1420 /* align? */ | |
| 1421 /* | |
| 1422 this is not allowed because of ? operator | |
| 1423 regv[creg]=regv[dreg]=0; | |
| 1424 use_register(creg,REG_EAX,0); | |
| 1425 use_register(dreg,REG_EBX,0); | |
| 1426 */ | |
| 1427 } | |
| 1428 | |
| 1429 void | |
| 1430 gen_comment(char *s) | |
| 1431 { | |
| 66 | 1432 if (chk) return; |
| 1433 printf("## %s",s); | |
| 61 | 1434 } |
| 1435 | |
| 1436 | |
| 1437 void | |
| 1438 code_enter(char *name) | |
| 1439 { | |
| 1440 printf("\t.align 4\n"); | |
| 1441 if (stmode!=STATIC) | |
| 1442 printf(".globl %s\n",name); | |
| 1443 printf("\t.type\t%s,@function\n",name); | |
| 1444 printf("%s:\n",name); | |
| 1445 } | |
| 1446 | |
| 77 | 1447 |
| 61 | 1448 void |
| 1449 code_enter1(int args) | |
| 1450 { | |
| 1451 code_disp_label=fwdlabel(); | |
| 1452 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1453 | |
| 1454 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1455 } | |
| 1456 | |
| 1457 void | |
| 1458 code_leave(char *name) | |
| 1459 { | |
| 63 | 1460 disp&= -size_of_int; |
| 61 | 1461 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1462 printf("_%d:\n",labelno); | |
| 1463 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1464 local_table(); | |
| 1465 labelno++; | |
| 1466 free_all_register(); | |
| 1467 } | |
| 1468 | |
| 1469 void | |
| 1470 enter(char *name) | |
| 1471 { | |
| 1472 printf("\t.align 2\n"); | |
| 1473 if (stmode!=STATIC) | |
| 1474 printf(".globl %s\n",name); | |
| 1475 printf("%s:\n",name); | |
| 1476 printf("\t.type\t%s,@function\n",name); | |
| 1477 printf("\tpushl %%ebp\n"); | |
| 1478 printf("\tmovl %%esp,%%ebp\n"); | |
| 1479 printf("\tpushl %%ebx\n"); | |
| 1480 printf("\tpushl %%esi\n"); | |
| 1481 printf("\tpushl %%edi\n"); | |
| 1482 } | |
| 1483 | |
| 1484 void | |
| 1485 enter1() | |
| 1486 { | |
| 182 | 1487 text_mode(); |
| 61 | 1488 func_disp_label=fwdlabel(); |
| 1489 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1490 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1491 } | |
| 1492 | |
| 1493 void | |
| 1494 leave(int control, char *name) | |
| 1495 { | |
| 128 | 1496 int sz; |
| 1497 | |
| 1498 disp &= -size_of_int; | |
| 61 | 1499 if (control) |
| 108 | 1500 code_set_return_register(1); |
| 61 | 1501 if (retcont) { |
| 1502 if (control) | |
| 1503 jmp(retlabel); | |
| 1504 fwddef(retcont); | |
| 128 | 1505 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1506 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1507 } else if (cadr(fnptr->ty)>0&&( | |
| 1508 car(cadr(fnptr->ty))==STRUCT || | |
| 1509 car(cadr(fnptr->ty))==UNION)) { | |
| 1510 sz = size(cadr(fnptr->ty)); | |
| 1511 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1512 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1513 register_name(creg,0)); | |
| 1514 emit_copy(dreg,creg,sz,0,1,1); | |
| 1515 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1516 use_register(creg,REG_EAX,0); | |
| 1517 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1518 } | |
| 61 | 1519 } |
| 1520 fwddef(retlabel); | |
| 63 | 1521 |
| 61 | 1522 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1523 printf("\tpopl %%edi\n"); | |
| 1524 printf("\tpopl %%esi\n"); | |
| 1525 printf("\tpopl %%ebx\n"); | |
| 1526 printf("\tleave\n"); | |
| 1527 printf("\tret\n"); | |
| 1528 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1529 printf("_%d:\n",labelno); | |
| 1530 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1531 local_table(); | |
| 1532 labelno++; | |
| 1533 free_all_register(); | |
| 1534 } | |
| 1535 | |
| 187 | 1536 int |
| 1537 code_get_fixed_creg(int reg,int type) { | |
| 1538 if (type==FLOAT||type==DOUBLE) { | |
| 1539 return 0; | |
| 1540 } else { | |
| 1541 return rname[reg]; | |
| 1542 } | |
| 1543 } | |
| 61 | 1544 |
| 1545 void | |
| 187 | 1546 code_set_fixed_creg(int reg,int mode,int type) { |
| 108 | 1547 if (type==FLOAT||type==DOUBLE) { |
| 187 | 1548 } else { |
| 1549 use_register(creg,reg,mode); | |
| 1550 } | |
| 61 | 1551 } |
| 1552 | |
| 1553 void | |
| 107 | 1554 code_set_return_register(int mode) { |
| 1555 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1556 } else { | |
| 1557 use_register(creg,REG_EAX,mode); | |
| 1558 } | |
| 1559 } | |
| 1560 | |
| 1561 void | |
| 61 | 1562 gen_gdecl(char *n, int gpc) |
| 1563 { | |
| 1564 /* | |
| 1565 if (stmode!=STATIC) | |
| 1566 printf(".globl %s\n",n); | |
| 1567 */ | |
| 1568 } | |
| 1569 | |
| 1570 void | |
| 1571 align(int t) | |
| 1572 { | |
| 1573 if (t!=CHAR) { | |
| 1574 if (data_alignment & 1) | |
| 1575 printf("\t.align 2\n"); | |
| 1576 data_alignment = 0; | |
| 1577 } | |
| 1578 } | |
| 1579 | |
| 1580 void | |
| 1581 emit_data(int e, int t, NMTBL *n) | |
| 1582 { | |
| 1583 int l; | |
| 82 | 1584 double d; |
| 1585 float f; | |
| 61 | 1586 char *name; |
| 1587 name = n->nm; | |
| 156 | 1588 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1589 error(-1); return; |
| 1590 } | |
| 66 | 1591 if (chk) return; |
| 61 | 1592 if (n->dsp != -1) { |
| 1593 n->dsp = -1; /* initiallized flag */ | |
| 1594 printf(".globl\t%s\n",name); | |
| 1595 data_mode(name); | |
| 1596 align(t); | |
| 1597 printf("%s:\n",name); | |
| 1598 } else { | |
| 1599 data_mode(0); | |
| 1600 } | |
| 1601 if(car(e)==CONST) { | |
| 168 | 1602 if (t==CHAR||t==UCHAR) { |
| 61 | 1603 printf("\t.byte %d\n",cadr(e)); |
| 1604 if (data_alignment>0) | |
| 1605 data_alignment++; | |
| 1606 gpc += 1; | |
| 168 | 1607 } else if (t==SHORT||t==USHORT) { |
| 1608 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1609 if (data_alignment>0) data_alignment++; |
| 168 | 1610 gpc += size_of_short; |
| 61 | 1611 } else { |
| 1612 printf("\t.long %d\n",cadr(e)); | |
| 1613 gpc += size_of_int; | |
| 1614 } | |
| 82 | 1615 } else if(t==DOUBLE) { |
| 1616 d = dcadr(e); | |
| 1617 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1618 } else if(t==FLOAT) { | |
| 1619 f = dcadr(e); | |
| 1620 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1621 } else if(t!=CHAR) { |
| 1622 gpc += size_of_int; | |
| 1623 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1624 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1625 } else if(car(e)==GVAR) { | |
| 1626 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1627 } else if(car(e)==FNAME) { |
| 1628 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1629 } else if(car(e)==STRING) { | |
| 1630 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1631 l = fwdlabel(); | |
| 1632 printf("\t.long _%d\n",l); | |
| 1633 printf(".section\t.rodata\n"); | |
| 1634 printf("_%d:\n",l); | |
| 1635 output_mode = RODATA_EMIT_MODE; | |
| 1636 } | |
| 1637 ascii((char *)cadr(e)); | |
| 1638 } else error(TYERR); | |
| 168 | 1639 } else error(TYERR); |
| 61 | 1640 } |
| 1641 | |
| 1642 void | |
| 1643 emit_data_closing(NMTBL *n) | |
| 1644 { | |
| 1645 int lb; | |
| 66 | 1646 if (chk) return; |
| 61 | 1647 if (mode==GDECL) { |
| 1648 data_mode(0); | |
| 1649 lb=fwdlabel(); | |
| 1650 printf("_%d:\n",lb); | |
| 1651 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1652 } | |
| 1653 } | |
| 1654 | |
| 1655 void | |
| 1656 global_table(void) | |
| 1657 { | |
| 1658 NMTBL *n; | |
| 1659 int init; | |
| 1660 init=0; | |
| 1661 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1662 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1663 /* n->dsp = -1 means initialized global */ |
| 1664 if (init==0) { | |
| 1665 data_mode(0); | |
| 1666 init=1; | |
| 1667 } | |
| 1668 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1669 } | |
| 1670 } | |
| 1671 } | |
| 1672 | |
| 1673 void | |
| 1674 local_table(void) | |
| 1675 { | |
| 1676 NMTBL *n; | |
| 1677 int init; | |
| 1678 init=0; | |
| 1679 /* static local variables */ | |
| 1680 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1681 if (n->sc == GVAR) { | |
| 1682 if (init==0) { | |
| 1683 data_mode(0); | |
| 1684 init=1; | |
| 1685 } | |
| 156 | 1686 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1687 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1688 } |
| 1689 } | |
| 1690 } | |
| 1691 | |
| 1692 void | |
| 1693 text_mode(void) | |
| 1694 { | |
| 1695 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1696 printf(".text\n"); | |
| 1697 printf("\t.align 2\n"); | |
| 1698 output_mode = TEXT_EMIT_MODE; | |
| 1699 } | |
| 1700 } | |
| 1701 | |
| 1702 void | |
| 1703 data_mode(char *name) | |
| 1704 { | |
| 1705 if (output_mode!=DATA_EMIT_MODE) { | |
| 1706 printf(".data\n"); | |
| 1707 output_mode = DATA_EMIT_MODE; | |
| 1708 } | |
| 1709 if (name) | |
| 1710 printf("\t.type\t%s,@object\n",name); | |
| 1711 } | |
| 1712 | |
| 81 | 1713 /* floating point */ |
| 1714 | |
| 1715 | |
| 82 | 1716 char * |
| 1717 fstore(int d) | |
| 1718 { | |
| 83 | 1719 return use? |
| 1720 (d?"fstl":"fsts"): | |
| 1721 (d?"fstpl":"fstps") | |
| 1722 ; | |
| 1723 } | |
| 1724 | |
| 1725 char * | |
| 1726 fstore_u(int d) | |
| 1727 { | |
| 82 | 1728 return d?"fstpl":"fstps"; |
| 1729 } | |
| 81 | 1730 |
| 82 | 1731 char * |
| 1732 fload(int d) | |
| 1733 { | |
| 1734 return d?"fldl":"flds"; | |
| 1735 } | |
| 81 | 1736 |
| 1737 | |
| 103 | 1738 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1739 { |
| 109 | 1740 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1741 } |
| 1742 | |
| 103 | 1743 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1744 { |
| 119 | 1745 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1746 } |
| 1747 | |
| 138 | 1748 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1749 { |
| 1750 error(-1); | |
| 1751 } | |
| 1752 | |
| 103 | 1753 void code_dassign(int e2,int freg,int d) |
| 82 | 1754 { |
| 1755 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1756 } | |
| 1757 | |
| 1758 static double d0 = 1.0; | |
| 81 | 1759 |
| 82 | 1760 int |
| 1761 code_d1(double d) | |
| 1762 { | |
| 1763 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1764 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1765 } | |
| 1766 | |
| 1767 int | |
| 1768 code_d2(double d) | |
| 1769 { | |
| 1770 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1771 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1772 } | |
| 1773 | |
| 138 | 1774 void code_dconst(int e2,int freg,int d) |
| 82 | 1775 { |
| 1776 int lb; | |
| 138 | 1777 double value = dcadr(e2); |
| 81 | 1778 |
| 138 | 1779 if (value==0.0) { |
| 82 | 1780 printf("\tfldz\n"); return; |
| 1781 } | |
| 138 | 1782 if (value==1.0) { |
| 82 | 1783 printf("\tfld1\n"); return; |
| 1784 } | |
| 1785 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1786 lb=fwdlabel(); | |
| 1787 printf("_%d:\n",lb); | |
| 138 | 1788 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1789 if (output_mode==TEXT_EMIT_MODE) { |
| 1790 printf(".text\n"); | |
| 1791 } else { | |
| 1792 text_mode(); | |
| 1793 } | |
| 1794 printf("\tfldl _%d\n",lb); | |
| 1795 } | |
| 1796 | |
| 138 | 1797 void code_dneg(int freg,int d) |
| 82 | 1798 { |
| 1799 printf("\tfchs\n"); | |
| 1800 } | |
| 81 | 1801 |
| 147 | 1802 void code_d2i(int freg) |
| 82 | 1803 { |
| 1804 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1805 printf("\tfnstcw (%%esp)\n"); | |
| 1806 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1807 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1808 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1809 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1810 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1811 printf("\tfldcw (%%esp)\n"); |
| 82 | 1812 printf("\tpopl %s\n",register_name(creg,0)); |
| 1813 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1814 } | |
| 81 | 1815 |
| 147 | 1816 void code_i2d(int creg) |
| 82 | 1817 { |
| 1818 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1819 printf("\tfildl (%%esp)\n"); | |
| 1820 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1821 } | |
| 1822 | |
| 147 | 1823 void code_d2u(int freg) |
| 85 | 1824 { |
| 86 | 1825 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1826 printf("\tfnstcw (%%esp)\n"); |
| 1827 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1828 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1829 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1830 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1831 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1832 printf("\tfldcw (%%esp)\n"); |
| 86 | 1833 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1834 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1835 } |
| 1836 | |
| 147 | 1837 void code_u2d(int creg) |
| 85 | 1838 { |
| 86 | 1839 printf("\tpushl %s\n",register_name(creg,0)); |
| 1840 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1841 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1842 printf("\tfildll (%%esp)\n"); | |
| 1843 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1844 } |
| 1845 | |
| 133 | 1846 void code_d2f(int freg) { } |
| 1847 void code_f2d(int freg) { } | |
| 147 | 1848 void code_f2i(int freg) { code_d2i(freg); } |
| 1849 void code_f2u(int freg) { code_d2u(freg); } | |
| 1850 void code_i2f(int creg) { code_i2d(creg); } | |
| 1851 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1852 |
| 107 | 1853 void code_drgvar(int e2,int d,int freg) |
| 82 | 1854 { |
| 109 | 1855 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1856 } |
| 81 | 1857 |
| 1858 | |
| 107 | 1859 void code_drlvar(int e2,int d,int freg) |
| 82 | 1860 { |
| 119 | 1861 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1862 } |
| 1863 | |
| 138 | 1864 void code_cmp_drgvar(int e2,int d) |
| 82 | 1865 { |
| 109 | 1866 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1867 } |
| 1868 | |
| 138 | 1869 void code_cmp_drlvar(int e2,int d) |
| 82 | 1870 { |
| 119 | 1871 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1872 } |
| 1873 | |
| 1874 void dtosop(int op,int e1) | |
| 94 | 1875 { |
| 82 | 1876 switch(op) { |
| 133 | 1877 case FADD: |
| 82 | 1878 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1879 case FSUB: |
| 85 | 1880 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1881 case FDIV: |
| 85 | 1882 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1883 case FMUL: |
| 82 | 1884 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1885 case FCMP: |
| 89 | 1886 case DCMP: |
| 82 | 1887 printf("\tfucompp\n"); |
| 1888 printf("\tfnstsw\t%%ax\n"); | |
| 1889 break; | |
| 1890 } | |
| 1891 } | |
| 81 | 1892 |
| 83 | 1893 void |
| 1894 code_dassop(int op,int d) { | |
| 1895 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1896 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1897 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1898 dtosop(op,0); | |
| 1899 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1900 } | |
| 1901 | |
| 1902 void | |
| 107 | 1903 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1904 g_expr(e2); |
| 1905 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1906 printf("\tfld1\n"); | |
| 87 | 1907 if (caddr(e1)>0) |
| 83 | 1908 printf("\tfaddp %%st,%%st(1)\n"); |
| 1909 else | |
| 1910 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1911 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1912 } | |
| 1913 | |
| 1914 void | |
| 107 | 1915 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1916 g_expr(e2); |
| 1917 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1918 if (use) | |
| 86 | 1919 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1920 printf("\tfld1\n"); |
| 87 | 1921 if (caddr(e1)>0) |
| 83 | 1922 printf("\tfaddp %%st,%%st(1)\n"); |
| 1923 else | |
| 1924 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1925 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1926 } |
| 1927 | |
| 84 | 1928 void |
| 1929 drexpr(int e1, int e2,int l1, int op) | |
| 1930 { | |
| 89 | 1931 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1932 switch(op) { |
| 1933 case DOP+GE: | |
| 133 | 1934 case FOP+GE: |
| 84 | 1935 printf("\ttestb\t$5,%%ah\n"); |
| 1936 printf("\tjne\t_%d\n",l1); | |
| 1937 break; | |
| 1938 case DOP+GT: | |
| 133 | 1939 case FOP+GT: |
| 84 | 1940 printf("\ttestb\t$69,%%ah\n"); |
| 1941 printf("\tjne\t_%d\n",l1); | |
| 1942 break; | |
| 1943 case DOP+EQ: | |
| 133 | 1944 case FOP+EQ: |
| 84 | 1945 printf("\tandb\t$69,%%ah\n"); |
| 1946 printf("\txorb\t$64,%%ah\n"); | |
| 1947 printf("\tjne\t_%d\n",l1); | |
| 1948 break; | |
| 1949 case DOP+NEQ: | |
| 133 | 1950 case FOP+NEQ: |
| 84 | 1951 printf("\tandb\t$69,%%ah\n"); |
| 1952 printf("\txorb\t$64,%%ah\n"); | |
| 1953 printf("\tje\t_%d\n",l1); | |
| 1954 break; | |
| 1955 } | |
| 1956 } | |
| 1957 | |
| 94 | 1958 void |
| 138 | 1959 code_dregister(int e2,int freg,int d) |
| 94 | 1960 { |
| 1961 error(-1); | |
| 1962 } | |
| 1963 | |
| 138 | 1964 void |
| 1965 code_cmp_dregister(int e2,int d) | |
| 94 | 1966 { |
| 1967 error(-1); | |
| 82 | 1968 } |
| 81 | 1969 |
| 97 | 1970 int pop_fregister() |
| 82 | 1971 { |
| 94 | 1972 if (freg_sp<0) { error(-1); return -1;} |
| 1973 printf("# fpop: %d\n",freg_sp-1); | |
| 1974 return freg_stack[--freg_sp]; | |
| 82 | 1975 } |
| 81 | 1976 |
| 94 | 1977 int |
| 138 | 1978 emit_dpop(int d) |
| 94 | 1979 { |
| 1980 int xreg; | |
| 97 | 1981 if ((xreg=pop_fregister())==-1) { |
| 94 | 1982 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1983 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1984 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1985 /* pushed order is reversed. We don't need this for comutable |
| 1986 operator, but it is ok to do this. */ | |
| 1987 printf("\tfxch\t%%st(1)\n"); | |
| 1988 } | |
| 1989 return xreg; | |
| 1990 } | |
| 1991 | |
| 1992 | |
| 138 | 1993 void emit_dpop_free(int e1,int d) |
| 82 | 1994 { |
| 1995 } | |
| 81 | 1996 |
| 133 | 1997 void emit_dpush(int type) |
| 82 | 1998 { |
| 119 | 1999 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 2000 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 2001 freg_stack[freg_sp++]=-1; |
| 94 | 2002 printf("# fpush:%d\n",freg_sp); |
| 2003 } | |
| 2004 | |
| 2005 void | |
| 2006 code_save_stacks() | |
| 2007 { | |
| 2008 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 2009 int xreg,sp,screg; | |
| 2010 sp=reg_sp; | |
| 2011 while(sp-->0) { | |
| 2012 if ((xreg=reg_stack[sp])>=0) { | |
| 2013 screg=creg; | |
| 2014 if(creg!=xreg) { | |
| 2015 if (xreg!=dreg) free_register(xreg); | |
| 2016 creg = xreg; | |
| 2017 } | |
| 2018 code_assign_lvar( | |
| 119 | 2019 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 2020 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 2021 regv[xreg]=0; | |
| 2022 creg=screg; | |
| 2023 } | |
| 2024 } | |
| 107 | 2025 code_save_fstacks(); |
| 2026 } | |
| 2027 | |
| 2028 void | |
| 2029 code_save_fstacks() | |
| 2030 { | |
| 127 | 2031 int xreg,sp,uses; |
| 2032 uses = use; use = 0; | |
| 94 | 2033 sp=freg_sp; |
| 2034 while(sp-->0) { | |
| 2035 if ((xreg=freg_stack[sp])==-1) { | |
| 2036 code_dassign_lvar( | |
| 119 | 2037 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 2038 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 2039 } | |
| 2040 } | |
| 127 | 2041 use = uses; |
| 82 | 2042 } |
| 81 | 2043 |
| 61 | 2044 /* end */ |