Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 180:f00e3bfa1b45
nkf.c compile (not correct)
| author | kono |
|---|---|
| date | Sun, 30 Nov 2003 18:26:36 +0900 |
| parents | 3b33c7daae95 |
| children | e1e9ec8c96a7 |
| 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/", | |
| 11 0 | |
| 12 }; | |
| 13 | |
| 14 | |
| 94 | 15 #define SAVE_STACKS 1 |
| 16 | |
| 61 | 17 #define TEXT_EMIT_MODE 0 |
| 18 #define DATA_EMIT_MODE 1 | |
| 19 #define RODATA_EMIT_MODE 2 | |
| 20 | |
| 21 static int output_mode = TEXT_EMIT_MODE; | |
| 22 static int data_alignment = 0; | |
| 23 | |
| 119 | 24 int size_of_int = 4; |
| 165 | 25 int size_of_short = 2; |
| 119 | 26 int size_of_float = 4; |
| 27 int size_of_double = 8; | |
| 28 int size_of_longlong = 8; | |
| 29 int endian = 0; | |
| 30 int MAX_REGISTER=6; /* intel386のレジスタを6つまで使う*/ | |
| 31 #define REAL_MAX_REGISTER 8 /* intel386のレジスタが8つということ*/ | |
| 32 int MAX_DATA_REG=4; | |
| 33 int MAX_POINTER=3; | |
| 34 int MAX_REGISTGER_VAR=2; | |
| 35 int MAX_FREGISTER=1; | |
| 36 | |
| 37 #define MAX_FPU_STACK 7 | |
| 38 | |
| 39 int MAX_INPUT_REGISTER_VAR = 0; | |
| 40 int MAX_CODE_INPUT_REGISTER_VAR = 2; | |
| 41 int MAX_INPUT_DREGISTER_VAR = 0; | |
| 138 | 42 int MAX_INPUT_FREGISTER_VAR = 0; |
| 119 | 43 int MAX_CODE_INPUT_DREGISTER_VAR = 0; |
| 61 | 44 |
| 138 | 45 int reg_sp; /* REGister Stack-Pointer */ |
| 46 int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 47 | |
| 48 /* floating point registers */ | |
| 49 | |
| 50 int freg_sp; /* floating point REGister Stack-Pointer */ | |
| 51 int freg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 52 | |
| 53 | |
| 61 | 54 /* |
| 128 | 55 -28 -8 local2 |
| 56 -24 -4 local1 | |
| 57 -20 8 arg3 | |
| 58 -16 4 arg2 | |
| 59 -12 0 arg1 | |
| 60 local2 -20 4 -8 (%edi) | |
| 61 local1 <-- -16 0 local variable -4 (%esi) | |
| 61 | 62 %edi -12 <- disp_offset %ebp |
| 63 %esi -8 | |
| 64 %ebx -4 | |
| 65 %ebp = %esp 0 | |
| 66 %eip 4 <- arg_offset | |
| 67 arg1 8 0 | |
| 68 arg2 12 4 | |
| 69 see enter/enter1/leave see code_enter | |
| 70 */ | |
| 71 int arg_offset = 8; | |
| 72 int disp_offset = -12; | |
| 73 int func_disp_offset = -12; | |
| 74 int code_disp_offset = 0; | |
| 75 int jump_offset = 0; | |
| 76 | |
| 119 | 77 static int code_disp_label; |
| 78 static int func_disp_label; | |
| 61 | 79 |
| 119 | 80 static int |
| 81 lvar(int l) | |
| 82 { | |
| 83 if (is_code(fnptr)) { | |
| 84 return l+code_disp_offset; | |
| 85 } else if (l<0) { | |
| 86 return l+disp_offset; | |
| 87 } else { | |
| 88 return l+arg_offset; | |
| 89 } | |
| 90 } | |
| 99 | 91 |
| 95 | 92 /* |
| 93 creg currrent virtual register | |
| 94 dreg spare virtual register | |
| 95 | |
| 96 rname[creg] currrent real register | |
| 97 rname[dreg] spare real register | |
| 98 | |
| 99 regs[] virtual register usage | |
| 100 regv[] value in virtual register flag | |
| 101 | |
| 102 reg_name[rname[creg]] | |
| 103 | |
| 104 freg current floating point register | |
| 105 fregv calue in floating point register | |
| 106 */ | |
| 107 | |
| 108 static int dreg; /* general temporal register */ | |
| 109 | |
| 110 int ia32regs[REAL_MAX_REGISTER]; | |
| 111 int ia32regv[REAL_MAX_REGISTER]; | |
| 112 int ia32rname[REAL_MAX_REGISTER]; | |
| 113 | |
| 114 int *regv = ia32regv; | |
| 115 int *regs = ia32regs; | |
| 116 static int *rname = ia32rname; | |
| 117 | |
| 118 int ia32fregs[1]; | |
| 119 int ia32fregv[1]; | |
| 120 | |
| 121 int freg; | |
| 122 int *fregv = ia32fregv; | |
| 123 int *fregs = ia32fregs; | |
| 124 | |
| 61 | 125 |
| 126 #define REG_EAX 0 | |
| 127 #define REG_EBX 1 | |
| 128 #define REG_ECX 2 | |
| 129 #define REG_EDX 3 | |
| 130 #define REG_ESI 4 | |
| 131 #define REG_EDI 5 | |
| 132 #define REG_EBP 6 | |
| 133 #define REG_ESP 7 | |
| 134 | |
| 135 | |
| 136 #define DATA_REG 0 | |
| 137 #define POINTER_REG 3 | |
| 138 static char *reg_name[8]; | |
| 139 static char *reg_name_l[4]; | |
| 140 static char *reg_name_w[4]; | |
| 141 | |
| 93 | 142 static void use_register(int virt, int real, int move); |
| 143 static int virtual(int real); | |
| 144 static void shift(char *op, int reg); | |
| 163 | 145 static void ld_indexx(int byte, int n, int xreg,int sign); |
| 93 | 146 static void data_mode(char *name); |
| 147 static int edx_setup(); | |
| 148 static void edx_cleanup(); | |
| 149 static void local_table(void); | |
| 150 static char * fload(int d); | |
| 151 static int code_d1(double d); | |
| 152 static int code_d2(double d); | |
| 94 | 153 static void code_save_stacks(); |
| 107 | 154 static void code_save_fstacks(); |
| 82 | 155 |
| 61 | 156 void |
| 157 code_init(void) | |
| 158 { | |
| 173 | 159 macro_define("__i386__ 1\n"); |
| 160 | |
| 61 | 161 arg_offset = 8; |
| 162 func_disp_offset = -12; | |
| 163 disp_offset = -12; | |
| 164 size_of_int = 4; | |
| 165 endian = 0; | |
| 166 MAX_REGISTER=6; | |
| 167 MAX_DATA_REG=4; | |
| 168 MAX_POINTER=3; | |
| 169 MAX_REGISTER_VAR=2; | |
| 170 | |
| 171 reg_name[REG_EAX] = "%eax"; | |
| 172 reg_name[REG_EBX] = "%ebx"; | |
| 173 reg_name[REG_ECX] = "%ecx"; | |
| 174 reg_name[REG_EDX] = "%edx"; | |
| 175 reg_name[REG_ESI] = "%esi"; | |
| 176 reg_name[REG_EDI] = "%edi"; | |
| 177 reg_name[REG_EBP] = "%ebp"; | |
| 178 reg_name[REG_ESP] = "%esp"; | |
| 179 reg_name_l[REG_EAX] = "%al"; | |
| 180 reg_name_l[REG_EBX] = "%bl"; | |
| 181 reg_name_l[REG_ECX] = "%cl"; | |
| 182 reg_name_l[REG_EDX] = "%dl"; | |
| 183 reg_name_w[REG_EAX] = "%ax"; | |
| 184 reg_name_w[REG_EBX] = "%bx"; | |
| 185 reg_name_w[REG_ECX] = "%cx"; | |
| 186 reg_name_w[REG_EDX] = "%dx"; | |
| 187 | |
| 188 } | |
| 189 | |
| 190 char * | |
| 191 register_name(int i,int byte) | |
| 192 { | |
| 193 if (i<0) { | |
| 194 error(REG_ERR); | |
| 195 return "%eax"; | |
| 196 } | |
| 165 | 197 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 198 return reg_name_l[rname[i]]; |
| 165 | 199 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 200 return reg_name_w[rname[i]]; | |
| 61 | 201 } else { |
| 168 | 202 return reg_name[rname[i]]; /* 0 or 4 means int */ |
| 61 | 203 } |
| 204 } | |
| 205 | |
| 147 | 206 int use_int(int i) { return i;} |
| 207 int use_float(int i) { return i;} | |
| 208 int use_double(int i) { return i;} | |
| 209 | |
| 61 | 210 void |
| 211 gexpr_code_init(void){ | |
| 212 use_register(creg,REG_EAX,0); | |
| 94 | 213 regv[creg]=0; |
| 61 | 214 regv[dreg]=0; |
| 215 } | |
| 216 | |
| 147 | 217 void |
| 218 code_gexpr(int e){ | |
| 219 } | |
| 220 | |
| 61 | 221 int |
| 222 register_var(int r) { | |
| 223 return virtual(r+REG_ESI); | |
| 224 } | |
| 225 | |
| 89 | 226 int |
| 227 get_register(void) | |
| 228 { /* 使われていないレジスタを調べる */ | |
| 229 int i; | |
| 230 for(i=0;i<MAX_REGISTER;i++) { | |
| 231 if (! regs[i]) { /* 使われていないなら */ | |
| 232 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 233 return i; /* その場所を表す番号を返す */ | |
| 234 } | |
| 235 } | |
| 236 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 237 } | |
| 238 | |
| 239 void | |
| 240 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 241 regv[i]=regs[i]=0; | |
| 242 } | |
| 243 | |
| 99 | 244 int |
| 126 | 245 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 246 { |
| 126 | 247 if (is_code) { |
| 248 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 249 i = virtual(i+REG_ESI); | |
| 250 regs[i]=regv[i]=1; | |
| 251 return list3(REGISTER,i,(int)nptr); | |
| 252 } else { | |
| 253 return 0; | |
| 254 } | |
| 99 | 255 } |
| 103 | 256 |
| 99 | 257 int |
| 138 | 258 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 259 { |
| 126 | 260 return 0; |
| 99 | 261 } |
| 262 | |
| 263 int | |
| 138 | 264 get_dregister(int d) |
| 99 | 265 { |
| 266 return -1; | |
| 267 } | |
| 268 | |
| 89 | 269 int |
| 270 register_full(void) | |
| 271 { | |
| 272 int i; | |
| 273 for(i=0;i<MAX_REGISTER;i++) { | |
| 274 if (! regs[i]) { | |
| 275 return 0; | |
| 276 } | |
| 277 } | |
| 278 return 1; | |
| 279 } | |
| 280 | |
| 281 int | |
| 137 | 282 free_register_count(int d) |
| 89 | 283 { |
| 284 int i,count; | |
| 285 count = 0; | |
| 286 for(i=0;i<MAX_REGISTER;i++) { | |
| 287 if (! regs[i] && ! regv[i]) count++; | |
| 288 } | |
| 137 | 289 return d?0:count; |
| 89 | 290 } |
| 291 | |
| 292 void | |
| 293 free_all_register(void) | |
| 294 { | |
| 295 int i; | |
| 296 for(i=0;i<MAX_REGISTER;i++) { | |
| 297 regs[i]=regv[i]=0; | |
| 298 } | |
| 299 creg = get_register(); | |
| 300 dreg = get_register(); | |
| 301 return; | |
| 302 } | |
| 303 | |
| 304 | |
| 305 void | |
| 306 register_usage(char *s) | |
| 307 { | |
| 308 int i; | |
| 309 if (chk) return; | |
| 310 printf("# %d: %s:",lineno,s); | |
| 311 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 312 for(i=0;i<MAX_REGISTER;i++) { | |
| 313 printf("%d",regs[i]); | |
| 314 } | |
| 315 printf(":"); | |
| 316 for(i=0;i<MAX_REGISTER;i++) { | |
| 317 printf("%d",regv[i]); | |
| 318 } | |
| 319 #if 0 | |
| 320 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 321 for(i=reg_sp;i>=0;i--) { | |
| 322 if(reg_stack[i]>=0) | |
| 323 printf(" %s",register_name(reg_stack[i],0)); | |
| 324 } | |
| 325 #endif | |
| 94 | 326 printf(" f:%d",freg_sp); |
| 89 | 327 printf("\n"); |
| 328 } | |
| 329 | |
| 109 | 330 void |
| 137 | 331 code_arg_register(NMTBL *fnptr) |
| 109 | 332 { |
| 137 | 333 int args = fnptr->dsp; |
| 334 NMTBL *n; | |
| 335 int reg_var = 0; | |
| 336 int freg_var = 0; | |
| 337 int type; | |
| 338 int reg; | |
| 339 int is_code0 = is_code(fnptr); | |
| 340 | |
| 341 while (args) { | |
| 342 /* process in reverse order */ | |
| 343 n = (NMTBL*)caddr(args); | |
| 344 type = n->ty; | |
| 345 if (scalar(type)) { | |
| 346 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 347 n->sc = REGISTER; | |
| 348 n->dsp = cadr(reg); | |
| 349 regv[n->dsp]= 1; | |
| 350 regs[n->dsp]= INPUT_REG; | |
| 351 reg_var++; | |
| 352 cadddr(args)=size_of_int; /* why we need this? */ | |
| 353 } | |
| 354 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 355 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 356 n->sc = DREGISTER; |
| 357 n->dsp = cadr(reg); | |
| 358 fregv[n->dsp]= 1; | |
| 359 fregs[n->dsp]= INPUT_REG; | |
| 360 freg_var++; | |
| 361 cadddr(args)=size(type); /* why we need this? */ | |
| 362 } | |
| 363 } | |
| 364 args = cadr(args); | |
| 365 } | |
| 109 | 366 } |
| 367 | |
| 89 | 368 void |
| 369 gexpr_init(void) | |
| 370 { | |
| 371 while(reg_sp > 0) { | |
| 94 | 372 if (reg_stack[--reg_sp]>=0) |
| 373 free_register(reg_stack[reg_sp]); | |
| 89 | 374 } |
| 94 | 375 freg_sp = 0; |
| 89 | 376 text_mode(); |
| 377 gexpr_code_init(); | |
| 378 register_usage("gexpr_init"); | |
| 379 } | |
| 380 | |
| 381 | |
| 382 void | |
| 383 emit_init(void) | |
| 384 { | |
| 385 int i; | |
| 386 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 387 free_all_register(); | |
| 388 reg_sp = 0; | |
| 94 | 389 freg_sp = 0; |
| 89 | 390 text_mode(); |
| 391 } | |
| 392 | |
| 393 int | |
| 394 virtual(int real) | |
| 395 { | |
| 396 int real_v,i; | |
| 397 real_v = -1; | |
| 398 for(i=0;i<MAX_REGISTER;i++) { | |
| 399 if (rname[i]==real) { | |
| 400 real_v=i; | |
| 401 break; | |
| 402 } | |
| 403 } | |
| 404 return real_v; | |
| 405 } | |
| 406 | |
| 407 int | |
| 408 pop_register(void) | |
| 409 { /* レジスタから値を取り出す */ | |
| 410 return reg_stack[--reg_sp]; | |
| 411 } | |
| 412 | |
| 413 void | |
| 414 emit_pop_free(int xreg) | |
| 415 { | |
| 159 | 416 if (xreg==dreg||xreg==creg) { |
| 89 | 417 regv[dreg]=0; |
| 98 | 418 } else if (xreg>=0) { |
| 89 | 419 free_register(xreg); |
| 420 } | |
| 421 } | |
| 422 | |
| 423 | |
| 61 | 424 int |
| 105 | 425 get_register_var(NMTBL *nptr) |
| 61 | 426 { |
| 427 int i; | |
| 428 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 429 if (! regs[i]) { /* 使われていないなら */ | |
| 430 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 431 regv[i]=0; | |
| 105 | 432 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 433 } |
| 434 } | |
| 104 | 435 return list2(LVAR,new_lvar(size_of_int)); |
| 436 } | |
| 437 | |
| 438 int | |
| 138 | 439 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 440 { |
| 138 | 441 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 442 } |
| 443 | |
| 61 | 444 void |
| 445 use_register(int virt, int real, int move) | |
| 446 { | |
| 447 int real_v; | |
| 448 char *move_op; | |
| 449 if (rname[virt]==real) | |
| 450 return; | |
| 451 real_v = virtual(real); | |
| 452 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 453 if (move || (regv[real_v])) { | |
| 454 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 455 } | |
| 456 rname[real_v] = rname[virt]; | |
| 457 rname[virt] = real; | |
| 458 } | |
| 459 | |
| 460 void | |
| 461 use_pointer(int virt, int move) | |
| 462 { | |
| 463 int i; | |
| 464 if (rname[virt]>=POINTER_REG) | |
| 465 return; | |
| 466 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 467 if (!regs[virtual(i)]) { | |
| 468 use_register(virt,i,move); | |
| 469 return; | |
| 470 } | |
| 471 } | |
| 472 /* we prefer EBX */ | |
| 473 use_register(virt,REG_EBX,move); | |
| 474 } | |
| 475 | |
| 476 void | |
| 477 use_data_reg(int virt, int move) | |
| 478 { | |
| 479 int i; | |
| 480 if (rname[virt]<MAX_DATA_REG) | |
| 481 return; | |
| 482 for(i=0;i<MAX_DATA_REG;i++) { | |
| 483 if (!regs[virtual(i)]) { | |
| 484 use_register(virt,i,move); | |
| 485 return; | |
| 486 } | |
| 487 } | |
| 488 /* we prefer EBX */ | |
| 489 use_register(virt,REG_EBX,move); | |
| 490 } | |
| 491 | |
| 492 | |
| 493 void | |
| 107 | 494 emit_push() |
| 61 | 495 { |
| 496 int new_reg; | |
| 497 new_reg = get_register(); | |
| 159 | 498 if (new_reg==creg) error(-1); |
| 61 | 499 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 500 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 501 reg_stack[reg_sp++] = -1; |
| 502 printf("\tpushl %s\n",register_name(creg,0)); | |
| 503 /* creg is used soon, don't regv[creg]=0 */ | |
| 504 } else { | |
| 505 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 506 creg = new_reg; | |
| 507 regv[creg]=1; | |
| 508 } | |
| 509 } | |
| 510 | |
| 511 int | |
| 512 emit_pop(int type) | |
| 513 { | |
| 514 int xreg; | |
| 515 if ((xreg=pop_register())==-1) { | |
| 516 if (type==POINTER_REG) | |
| 517 use_pointer(dreg,0); | |
| 518 else if (type==DATA_REG) | |
| 519 use_data_reg(dreg,0); | |
| 520 if (regv[dreg]) { | |
| 521 printf("# emit_pop dreg conflict\n"); | |
| 94 | 522 error(-1); |
| 61 | 523 } |
| 524 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 525 regv[dreg]=1; |
| 526 return dreg; | |
| 527 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 528 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 529 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 530 regv[dreg]=1; |
| 531 return dreg; | |
| 532 } | |
| 61 | 533 return xreg; |
| 534 } | |
| 535 | |
| 92 | 536 void |
| 537 code_label(int labelno) | |
| 538 { | |
| 539 printf("_%d:\n",labelno); | |
| 540 } | |
| 61 | 541 |
| 542 void | |
| 107 | 543 code_gvar(int e1,int creg) { |
| 109 | 544 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 545 regv[creg]=1; |
| 61 | 546 } |
| 547 | |
| 548 | |
| 549 void | |
| 107 | 550 code_rgvar(int e1,int creg) { |
| 109 | 551 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 552 regv[creg]=1; |
| 61 | 553 } |
| 166 | 554 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 555 void |
| 165 | 556 code_crgvar(int e1,int creg,int sign,int sz){ |
| 557 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 558 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 559 regv[creg]=1; |
| 61 | 560 } |
| 561 | |
| 562 | |
| 563 void | |
| 107 | 564 code_lvar(int e2,int creg) { |
| 119 | 565 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 566 regv[creg]=1; |
| 61 | 567 } |
| 568 | |
| 569 | |
| 570 void | |
| 107 | 571 code_register(int e2,int creg) { |
| 61 | 572 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 573 regv[creg]=1; |
| 61 | 574 } |
| 575 | |
| 576 | |
| 577 void | |
| 94 | 578 code_rlvar(int e2,int reg) { |
| 119 | 579 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 580 regv[creg]=1; |
| 61 | 581 } |
| 582 | |
| 583 | |
| 584 void | |
| 165 | 585 code_crlvar(int e2,int reg,int sign,int sz) { |
| 586 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 587 regv[creg]=1; |
| 61 | 588 } |
| 589 | |
| 590 | |
| 591 void | |
| 109 | 592 code_fname(NMTBL *n,int creg) { |
| 593 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 594 regv[creg]=1; |
| 61 | 595 } |
| 596 | |
| 597 | |
| 598 void | |
| 107 | 599 code_const(int e2,int creg) { |
| 61 | 600 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 601 regv[creg]=1; |
| 61 | 602 } |
| 603 | |
| 604 | |
| 605 void | |
| 107 | 606 code_neg(int creg) { |
| 61 | 607 printf("\tnegl %s\n", register_name(creg,0)); |
| 608 } | |
| 609 | |
| 610 | |
| 611 void | |
| 107 | 612 code_not(int creg) { |
| 61 | 613 printf("\tnotl %s\n", register_name(creg,0)); |
| 614 } | |
| 615 | |
| 616 | |
| 617 void | |
| 107 | 618 code_lnot(int creg) { |
| 61 | 619 char *xrn; |
| 620 use_data_reg(creg,1); | |
| 621 xrn = register_name(creg,1); | |
| 622 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 623 printf("\tsete %s\n", xrn); | |
| 624 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 625 } | |
| 626 | |
| 627 void | |
| 168 | 628 code_preinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 629 char *xrn; |
| 630 if (car(e2)==REGISTER) { | |
| 168 | 631 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 632 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 633 regv[reg]=1; | |
| 61 | 634 return; |
| 635 } | |
| 636 g_expr(e2); | |
| 637 xrn = register_name(creg,0); | |
| 168 | 638 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 639 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); | |
| 61 | 640 } |
| 641 | |
| 642 | |
| 643 void | |
| 168 | 644 code_postinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 645 char *xrn; |
| 646 if (car(e2)==REGISTER) { | |
| 107 | 647 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 168 | 648 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 649 regv[reg]=1; |
| 61 | 650 return; |
| 651 } | |
| 652 g_expr(e2); | |
| 653 emit_push(); | |
| 654 xrn = register_name((e2=emit_pop(0)),0); | |
| 165 | 655 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 168 | 656 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 61 | 657 emit_pop_free(e2); |
| 658 } | |
| 659 | |
| 660 | |
| 661 | |
| 662 void | |
| 107 | 663 code_return(int creg) { |
| 61 | 664 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 665 regv[creg]=1; |
| 61 | 666 } |
| 667 | |
| 668 | |
| 669 void | |
| 107 | 670 code_environment(int creg) { |
| 61 | 671 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 672 regv[creg]=1; |
| 61 | 673 } |
| 674 | |
| 675 | |
| 676 void | |
| 116 | 677 code_bool(int e1) { |
| 61 | 678 char *xrn; |
| 679 int e2,e3; | |
| 680 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 681 xrn = register_name(creg,0); | |
| 682 printf("\txorl %s,%s\n",xrn,xrn); | |
| 683 jmp(e3=fwdlabel()); | |
| 684 fwddef(e2); | |
| 685 printf("\tmovl $1,%s\n",xrn); | |
| 686 fwddef(e3); | |
| 107 | 687 regv[creg]=1; |
| 61 | 688 } |
| 689 | |
| 690 char * | |
| 691 code_gt(int cond) { | |
| 692 return (cond?"g":"le"); | |
| 693 } | |
| 694 | |
| 695 char * | |
| 696 code_ugt(int cond) { | |
| 697 return (cond?"a":"be"); | |
| 698 } | |
| 699 | |
| 700 char * | |
| 701 code_ge(int cond) { | |
| 702 return (cond?"ge":"l"); | |
| 703 } | |
| 704 | |
| 705 char * | |
| 706 code_uge(int cond) { | |
| 707 return (cond?"ae":"b"); | |
| 708 } | |
| 709 | |
| 710 char * | |
| 711 code_eq(int cond) { | |
| 712 return (cond?"e":"ne"); | |
| 713 } | |
| 714 | |
| 715 void | |
| 167 | 716 code_cmp_crgvar(int e1,int sz) { |
| 717 if (sz==1) | |
| 718 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 719 else if (sz==size_of_short) | |
| 720 printf("\tcmpw $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 61 | 721 } |
| 722 | |
| 723 | |
| 724 void | |
| 167 | 725 code_cmp_crlvar(int e1,int sz) { |
| 726 if (sz==1) | |
| 727 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); | |
| 728 else if (sz==size_of_short) | |
| 729 printf("\tcmpw $0,%d(%%ebp)\n",lvar(e1)); | |
| 61 | 730 } |
| 731 | |
| 732 | |
| 733 void | |
| 734 code_cmp_rgvar(int e1) { | |
| 109 | 735 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 736 } |
| 737 | |
| 738 | |
| 739 void | |
| 740 code_cmp_rlvar(int e1) { | |
| 119 | 741 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 742 } |
| 743 | |
| 744 | |
| 745 void | |
| 746 code_cmp_register(int e2) { | |
| 747 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 748 } | |
| 749 | |
| 750 | |
| 751 void | |
| 752 ascii(char *s) | |
| 753 { | |
| 754 printf("\t.string \""); | |
| 755 while(*s) { | |
| 756 if (*s=='\n') | |
| 757 printf("%cn",92); | |
| 758 else if (*s<' ') | |
| 759 printf("%c%03o",92,*s); | |
| 760 else if (*s==34) | |
| 761 printf("%c%c",92,34); | |
| 762 else | |
| 763 printf("%c",*s); | |
| 764 s++; | |
| 765 } | |
| 766 printf("%c\n",34); | |
| 767 } | |
| 768 | |
| 769 void | |
| 107 | 770 code_string(int e1,int creg) |
| 61 | 771 { |
| 772 char *s; | |
| 773 int i,lb; | |
| 774 | |
| 775 if (0) { | |
| 776 s=(char *)cadr(e1); | |
| 777 lb=fwdlabel(); | |
| 778 printf("\tjmp _%d\n",lb); | |
| 779 i=backdef(); | |
| 780 ascii(s); | |
| 781 printf("\t.align 2\n"); | |
| 782 fwddef(lb); | |
| 783 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 784 } else { | |
| 785 s=(char *)cadr(e1); | |
| 786 printf(".section\t.rodata\n"); | |
| 787 lb=fwdlabel(); | |
| 788 printf("_%d:\n",lb); | |
| 789 ascii(s); | |
| 790 if (output_mode==TEXT_EMIT_MODE) { | |
| 791 printf(".text\n"); | |
| 792 } else { | |
| 793 text_mode(); | |
| 794 } | |
| 795 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 796 } | |
| 797 } | |
| 798 | |
| 799 #define MAX_COPY_LEN 20 | |
| 800 | |
| 801 void | |
| 802 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 803 { | |
| 804 int fix = 0; | |
| 805 /* length <0 means upward direction copy */ | |
| 806 switch (length) { | |
| 807 case 0: break; | |
| 808 case 1: case -1: | |
| 809 printf("\tmovb %d(%s),%s\n",offset, | |
| 810 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 811 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 812 register_name(to,0)); | |
| 813 break; | |
| 814 case 2: case -2: | |
| 815 printf("\tmovw %d(%s),%s\n",offset, | |
| 816 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 817 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 818 register_name(to,0)); | |
| 819 break; | |
| 820 case 4: case -4: | |
| 821 printf("\tmovl %d(%s),%s\n",offset, | |
| 822 register_name(from,0), register_name(dreg,0)); | |
| 823 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 824 register_name(to,0)); | |
| 825 break; | |
| 826 default: | |
| 827 if (-MAX_COPY_LEN<length && length <0) { | |
| 828 for(;length<=4;length+=4,offset-=4) | |
| 829 emit_copy(from,to,4,offset,0,det); | |
| 830 for(;length<=2;length+=2,offset-=2) | |
| 831 emit_copy(from,to,2,offset,0,det); | |
| 832 if(length>0) | |
| 833 emit_copy(from,to,length,offset,0,det); | |
| 834 break; | |
| 835 } else if (length <=MAX_COPY_LEN) { | |
| 836 for(;length>=4;length-=4,offset+=4) | |
| 837 emit_copy(from,to,4,offset,0,det); | |
| 838 for(;length>=2;length-=2,offset+=2) | |
| 839 emit_copy(from,to,2,offset,0,det); | |
| 840 if(length>0) | |
| 841 emit_copy(from,to,length,offset,0,det); | |
| 842 break; | |
| 843 } | |
| 844 if (det) { | |
| 845 /* | |
| 846 call bcopy | |
| 847 g_expr(list3(FUNCTION,,); | |
| 848 break; | |
| 849 */ | |
| 850 } | |
| 851 use_register(from,REG_ESI,1); | |
| 852 use_register(to, REG_EDI,1); | |
| 853 use_register(dreg,REG_ECX,0); | |
| 854 if (length<0) { | |
| 855 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 856 printf("\taddl $%d,%%esi\n",-length); | |
| 857 printf("\taddl $%d,%%edi\n",-length); | |
| 858 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 859 if(length%4) { | |
| 860 emit_copy(from,to,length,offset+length/4,0,det); | |
| 861 } | |
| 862 } else { | |
| 863 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 864 fix = (length/4)*4; | |
| 865 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 866 if(length%4) { | |
| 867 emit_copy(from,to,length,offset+length/4,0,det); | |
| 868 } | |
| 869 } | |
| 870 } | |
| 871 if (value) { | |
| 872 /* creg must point top of the destination data */ | |
| 873 /* this code is necessary for the value of assignment or function call */ | |
| 874 /* otherwise we don't need this */ | |
| 875 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 876 if(creg!=to) { | |
| 877 if (to==dreg) | |
| 878 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 879 else { | |
| 880 free_register(creg); creg=to; | |
| 881 } | |
| 882 } | |
| 883 } | |
| 884 regv[from]=regv[to]=regv[dreg]=0; | |
| 885 regv[creg]=1; | |
| 886 } | |
| 887 | |
| 888 int | |
| 889 struct_push(int e4,int t) | |
| 890 { | |
| 81 | 891 int length,xreg,save,lreg,count; |
| 61 | 892 g_expr(e4); |
| 893 length=size(t); | |
| 894 if(length%size_of_int) { | |
| 895 length += size_of_int - (length%size_of_int); | |
| 896 } | |
| 81 | 897 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 898 if (length==0) return count; | |
| 899 else { | |
| 900 printf("\tpushl %d(%s)\n", | |
| 901 length-size_of_int,register_name(creg,0)); | |
| 902 } | |
| 61 | 903 } |
| 904 printf("\tsubl $%d,%%esp\n",length); | |
| 905 if (register_full()) { | |
| 906 save = 1; | |
| 907 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 908 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 909 xreg = lreg; regv[xreg]=0; | |
| 910 } else { | |
| 911 save=0; | |
| 912 xreg = get_register(); | |
| 913 } | |
| 914 if (save) | |
| 915 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 916 else | |
| 917 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 918 regv[xreg]=1; | |
| 919 /* downward direction copy */ | |
| 920 emit_copy(creg,xreg,length,0,0,1); | |
| 921 /* we have value in creg, it may be changed */ | |
| 922 if (save) { | |
| 923 if(creg==xreg) { | |
| 924 creg = get_register(); /* creg is freed in emit_copy */ | |
| 925 } | |
| 926 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 927 regv[xreg]=1; | |
| 928 } else | |
| 929 free_register(xreg); | |
| 930 return length/size_of_int; | |
| 931 } | |
| 932 | |
| 94 | 933 int |
| 61 | 934 function(int e1) |
| 935 { | |
| 127 | 936 int e2,e3,e4,nargs,t,ret_type; |
| 937 NMTBL *n=0; | |
| 61 | 938 int save,saved; |
|
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939 ret_type = cadr(cadddr(e1)); |
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940 if (ret_type==CHAR) ret_type=INT; |
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changeset
|
941 |
| 94 | 942 #ifdef SAVE_STACKS |
| 943 code_save_stacks(); | |
| 944 #endif | |
| 137 | 945 if (free_register_count(0)<1) { |
| 61 | 946 for(save = 0;save==dreg||save==creg;save++); |
| 947 printf("\tpushl %s\n",register_name(save,0)); | |
| 948 saved = 1; | |
| 949 } else { | |
| 950 save = get_register(); | |
| 951 saved = 0; | |
| 952 } | |
| 953 regv[save]=0; | |
| 954 e2 = cadr(e1); | |
| 955 nargs = 0; | |
| 956 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 957 t=caddr(e3); | |
| 127 | 958 e4 = car(e3); |
| 61 | 959 if(scalar(t)) { |
| 960 g_expr(e4); | |
| 961 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 962 } else if (t==DOUBLE) { |
| 963 g_expr(e4); | |
| 964 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 965 nargs += size_of_double/size_of_int; |
| 83 | 966 fregv[freg]=0; |
| 82 | 967 continue; |
| 968 } else if (t==FLOAT) { | |
| 969 g_expr(e4); | |
| 970 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 971 nargs += size_of_float/size_of_int; |
| 83 | 972 fregv[freg]=0; |
| 82 | 973 continue; |
| 61 | 974 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 975 nargs += struct_push(e4,t); | |
| 976 continue; | |
| 977 } else { | |
| 978 error(TYERR); | |
| 979 } | |
| 980 ++nargs; | |
| 981 } | |
| 982 if (car(e2) == FNAME) { | |
| 983 n=(NMTBL *)cadr(e2); | |
| 78 | 984 regv[creg]=0; |
| 985 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 986 } else { |
| 987 g_expr(e2); | |
| 78 | 988 regv[creg]=1; |
| 989 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 990 } |
| 991 | |
| 992 /* we don't have to save creg nor dreg */ | |
| 993 regs[creg]=0; regs[dreg]=0; | |
| 78 | 994 regv[dreg]= regv[save]= 0; |
| 61 | 995 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 996 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 997 regs[creg]=1; regs[dreg]=1; | |
| 998 | |
| 999 if (car(e2) == FNAME) { | |
| 1000 printf("\tcall\t%s\n",n->nm); | |
| 1001 } else { | |
| 1002 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1003 } | |
| 1004 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1005 if (saved) { | |
| 1006 printf("\tpopl %s\n",register_name(save,0)); | |
| 1007 } else { | |
| 1008 free_register(save); | |
| 1009 } | |
| 1010 regv[save]=0; | |
| 105 | 1011 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1012 fregv[freg]=1; regv[creg]=0; |
| 105 | 1013 } else if (ret_type==VOID) { |
| 94 | 1014 fregv[freg]=0; regv[creg]=0; |
| 1015 } else { | |
| 1016 fregv[freg]=0; regv[creg]=1; | |
| 1017 } | |
| 105 | 1018 return ret_type; |
| 61 | 1019 } |
| 1020 | |
| 1021 void | |
| 1022 code_frame_pointer(int e3) { | |
| 1023 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1024 } | |
| 1025 | |
| 1026 | |
| 1027 void | |
| 62 | 1028 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1029 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1030 } | |
| 1031 | |
| 1032 | |
| 1033 void | |
| 1034 code_jmp(char *s) { | |
| 1035 printf("\tjmp %s\n",s); | |
| 1036 } | |
| 1037 | |
| 1038 | |
| 1039 void | |
| 1040 code_indirect_jmp(int e2) { | |
| 1041 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1042 } | |
| 1043 | |
| 94 | 1044 int |
| 61 | 1045 rindirect(int e1) /* *(p +5 ) */ |
| 1046 { | |
| 1047 char *op; | |
| 94 | 1048 int e2,e3,byte,t; |
| 61 | 1049 e3 = cadr(e2 = cadr(e1)); |
| 1050 g_expr(e2); | |
| 82 | 1051 switch (car(e1)) { |
| 1052 case FRINDIRECT: case DRINDIRECT: | |
| 163 | 1053 printf("\t%s (%s)\n",fload(car(e1)==DRINDIRECT),register_name(creg,0)); |
| 1054 t=DOUBLE; | |
| 1055 return t; | |
| 1056 break; | |
| 1057 case CRINDIRECT: | |
| 1058 byte = 1; op="movsbl";t=CHAR; | |
| 166 | 1059 break; |
| 163 | 1060 case CURINDIRECT: |
| 166 | 1061 byte = 1; op="movzbl";t=UCHAR; |
| 1062 break; | |
| 165 | 1063 case SRINDIRECT: |
| 1064 byte = 1; op="movswl";t=SHORT; | |
| 166 | 1065 break; |
| 165 | 1066 case SURINDIRECT: |
| 166 | 1067 byte = 1; op="movzwl";t=USHORT; |
| 1068 break; | |
| 163 | 1069 case RINDIRECT: default: |
| 1070 byte = 0; op="movl";t=INT; | |
| 1071 } | |
| 61 | 1072 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 94 | 1073 return t; |
| 61 | 1074 } |
| 1075 | |
| 1076 char * | |
| 1077 move(int byte) | |
| 1078 { | |
| 165 | 1079 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1080 } |
| 1081 | |
| 1082 void | |
| 103 | 1083 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1084 if (byte) use_data_reg(creg,1); |
| 109 | 1085 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1086 } |
| 1087 | |
| 1088 void | |
| 103 | 1089 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1090 if (byte) use_data_reg(creg,1); |
| 119 | 1091 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1092 } |
| 1093 | |
| 1094 void | |
| 111 | 1095 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1096 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1097 } | |
| 1098 | |
| 1099 void | |
| 118 | 1100 code_assign(int e2,int byte,int creg) { |
| 95 | 1101 if (byte) use_data_reg(creg,1); |
| 61 | 1102 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1103 regv[creg]=1; |
| 61 | 1104 } |
| 1105 | |
| 1106 void | |
| 1107 code_register_assop(int e2,int op,int byte) { | |
| 1108 int reg; | |
| 1109 int xreg = creg; | |
| 1110 creg = reg = e2; | |
| 1111 tosop(op,xreg); | |
| 1112 creg = xreg; | |
| 1113 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1114 regs[creg]=regv[creg]=1; |
| 61 | 1115 } |
| 1116 | |
| 1117 | |
| 1118 void | |
| 163 | 1119 code_assop(int op,int byte,int sign) { |
| 61 | 1120 char *xrn; |
| 1121 int xreg; | |
| 1122 int edx = edx_setup(); | |
| 1123 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1124 regv[xreg]=regs[xreg]=1; | |
| 1125 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1126 regv[edx]=1; | |
| 163 | 1127 ld_indexx(byte,0,edx,sign); |
| 61 | 1128 tosop(op,xreg); |
| 165 | 1129 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1130 edx_cleanup(); |
| 1131 emit_pop_free(xreg); | |
| 144 | 1132 regv[creg]=1; |
| 61 | 1133 } |
| 1134 | |
| 1135 | |
| 1136 void | |
| 1137 tosop(int op,int oreg) | |
| 1138 { | |
| 1139 int dx; | |
| 1140 char *orn,*crn; | |
| 1141 | |
| 1142 switch(op) { | |
| 1143 case LSHIFT: | |
| 1144 case ULSHIFT: | |
| 1145 shift("sall",oreg); | |
| 144 | 1146 regv[creg]=1; |
| 61 | 1147 return; |
| 1148 case RSHIFT: | |
| 1149 shift("sarl",oreg); | |
| 144 | 1150 regv[creg]=1; |
| 61 | 1151 return; |
| 1152 case URSHIFT: | |
| 1153 shift("shrl",oreg); | |
| 144 | 1154 regv[creg]=1; |
| 61 | 1155 return; |
| 1156 } | |
| 1157 if(oreg==-1) { | |
| 1158 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1159 oreg = dreg; | |
| 1160 regv[dreg]=1; | |
| 94 | 1161 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1162 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1163 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1164 oreg = dreg; |
| 1165 regv[dreg]=1; | |
| 61 | 1166 } |
| 1167 regv[oreg]=1; regs[oreg]=1; | |
| 1168 orn = register_name(oreg,0); | |
| 1169 crn = register_name(creg,0); | |
| 1170 switch(op) { | |
| 1171 case ADD: | |
| 1172 printf("\taddl %s,%s\n",orn,crn); | |
| 1173 break; | |
| 89 | 1174 case SUB: case CMP: |
| 61 | 1175 printf("\tsubl %s,%s\n",orn,crn); |
| 1176 break; | |
| 1177 case BAND: | |
| 1178 printf("\tandl %s,%s\n",orn,crn); | |
| 1179 break; | |
| 1180 case EOR: | |
| 1181 printf("\txorl %s,%s\n",orn,crn); | |
| 1182 break; | |
| 1183 case BOR: | |
| 1184 printf("\torl %s,%s\n",orn,crn); | |
| 1185 break; | |
| 1186 case MUL: | |
| 1187 case UMUL: | |
| 1188 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1189 break; | |
| 1190 case DIV: | |
| 1191 case UDIV: | |
| 1192 use_register(creg,REG_EAX,1); | |
| 1193 edx_setup(); | |
| 1194 orn = register_name(oreg,0); | |
| 1195 if (op==DIV) | |
| 127 | 1196 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1197 else |
| 127 | 1198 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1199 edx_cleanup(); |
| 1200 break; | |
| 1201 case MOD: | |
| 1202 case UMOD: | |
| 1203 use_register(creg,REG_EAX,1); | |
| 1204 edx_setup(); | |
| 1205 orn = register_name(oreg,0); | |
| 1206 if (op==DIV) | |
| 127 | 1207 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1208 else |
| 127 | 1209 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1210 dx = virtual(REG_EDX); |
| 1211 if (dx!=creg) { | |
| 1212 rname[dx]=rname[creg]; | |
| 1213 rname[creg]=REG_EDX; | |
| 1214 } | |
| 1215 edx_cleanup(); | |
| 1216 break; | |
| 1217 } | |
| 159 | 1218 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1219 free_register(oreg); |
| 94 | 1220 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1221 regv[creg]=1; |
| 61 | 1222 } |
| 1223 | |
| 1224 static int edx_stack=0; | |
| 1225 | |
| 1226 int | |
| 1227 edx_setup() | |
| 1228 { | |
| 1229 int edx_save; | |
| 1230 /* make real EDX register empty */ | |
| 137 | 1231 if (free_register_count(0)<1) { |
| 61 | 1232 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1233 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1234 edx_stack = list3(edx_save,edx_stack,0); | |
| 1235 } else { | |
| 1236 edx_save = get_register(); | |
| 1237 edx_stack = list3(edx_save,edx_stack,1); | |
| 1238 } | |
| 1239 regv[edx_save]=0; | |
| 1240 use_register(edx_save,REG_EDX,0); | |
| 1241 return edx_save; | |
| 1242 } | |
| 1243 | |
| 1244 | |
| 1245 void | |
| 1246 edx_cleanup() | |
| 1247 { | |
| 1248 if (caddr(edx_stack)==0) { | |
| 1249 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1250 } else | |
| 1251 free_register(car(edx_stack)); | |
| 1252 edx_stack = cadr(edx_stack); | |
| 1253 } | |
| 1254 | |
| 1255 void | |
| 1256 shift(char *op, int reg) | |
| 1257 { | |
| 1258 if (reg>=0) { | |
| 1259 use_register(reg,REG_ECX,1); | |
| 103 | 1260 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1261 use_register(dreg,REG_ECX,0); | |
| 119 | 1262 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1263 reg = dreg; |
| 1264 regv[dreg]=0; | |
| 61 | 1265 } else { |
| 1266 use_register(dreg,REG_ECX,0); | |
| 1267 printf("\tpopl %%ecx\n"); | |
| 103 | 1268 regv[dreg]=0; |
| 61 | 1269 } |
| 1270 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1271 } | |
| 1272 | |
| 1273 void | |
| 163 | 1274 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1275 { |
| 1276 char *op; | |
| 1277 | |
| 166 | 1278 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1279 if (n) |
| 95 | 1280 printf("\t%s %d(%s),%s\n",op,n, |
| 1281 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1282 else |
| 95 | 1283 printf("\t%s (%s),%s\n",op, |
| 1284 register_name(xreg,0),register_name(creg,byte)); | |
| 1285 } | |
| 1286 | |
| 1287 int | |
| 1288 code_csvalue() | |
| 1289 { | |
| 123 | 1290 return rname[creg]; /* for switch value */ |
| 61 | 1291 } |
| 1292 | |
| 1293 void | |
| 95 | 1294 code_cmpdimm(int e, int csreg) |
| 61 | 1295 { |
| 1296 /* used in dosiwtch() */ | |
| 66 | 1297 if(chk) return; |
| 123 | 1298 use_register(creg,csreg,0); |
| 61 | 1299 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1300 } | |
| 1301 | |
| 1302 void | |
| 66 | 1303 code_opening(char *filename) |
| 61 | 1304 { |
| 1305 printf("\t.file \"%s\"\n",filename); | |
| 1306 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1307 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1308 printf(".text\n"); |
| 1309 } | |
| 1310 | |
| 1311 void | |
| 66 | 1312 code_closing() |
| 61 | 1313 { |
| 78 | 1314 global_table(); |
| 61 | 1315 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1316 } | |
| 1317 | |
| 1318 void | |
| 89 | 1319 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1320 { |
| 89 | 1321 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1322 printf("\tj%s\t_%d\n",s,l1); |
| 1323 } | |
| 1324 | |
| 82 | 1325 |
| 1326 void | |
| 61 | 1327 jcond(int l, char cond) |
| 1328 { | |
| 66 | 1329 if (chk) return; |
| 61 | 1330 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1331 } | |
| 1332 | |
| 1333 void | |
| 1334 jmp(int l) | |
| 1335 { | |
| 1336 control=0; | |
| 66 | 1337 if (chk) return; |
| 61 | 1338 printf("\tjmp\t_%d\n",l); |
| 1339 /* align? */ | |
| 1340 /* | |
| 1341 this is not allowed because of ? operator | |
| 1342 regv[creg]=regv[dreg]=0; | |
| 1343 use_register(creg,REG_EAX,0); | |
| 1344 use_register(dreg,REG_EBX,0); | |
| 1345 */ | |
| 1346 } | |
| 1347 | |
| 1348 void | |
| 1349 gen_comment(char *s) | |
| 1350 { | |
| 66 | 1351 if (chk) return; |
| 1352 printf("## %s",s); | |
| 61 | 1353 } |
| 1354 | |
| 1355 | |
| 1356 void | |
| 1357 code_enter(char *name) | |
| 1358 { | |
| 1359 printf("\t.align 4\n"); | |
| 1360 if (stmode!=STATIC) | |
| 1361 printf(".globl %s\n",name); | |
| 1362 printf("\t.type\t%s,@function\n",name); | |
| 1363 printf("%s:\n",name); | |
| 1364 } | |
| 1365 | |
| 77 | 1366 |
| 61 | 1367 void |
| 1368 code_enter1(int args) | |
| 1369 { | |
| 1370 code_disp_label=fwdlabel(); | |
| 1371 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1372 | |
| 1373 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1374 } | |
| 1375 | |
| 1376 void | |
| 1377 code_leave(char *name) | |
| 1378 { | |
| 63 | 1379 disp&= -size_of_int; |
| 61 | 1380 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1381 printf("_%d:\n",labelno); | |
| 1382 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1383 local_table(); | |
| 1384 labelno++; | |
| 1385 free_all_register(); | |
| 1386 } | |
| 1387 | |
| 1388 void | |
| 1389 enter(char *name) | |
| 1390 { | |
| 1391 printf("\t.align 2\n"); | |
| 1392 if (stmode!=STATIC) | |
| 1393 printf(".globl %s\n",name); | |
| 1394 printf("%s:\n",name); | |
| 1395 printf("\t.type\t%s,@function\n",name); | |
| 1396 printf("\tpushl %%ebp\n"); | |
| 1397 printf("\tmovl %%esp,%%ebp\n"); | |
| 1398 printf("\tpushl %%ebx\n"); | |
| 1399 printf("\tpushl %%esi\n"); | |
| 1400 printf("\tpushl %%edi\n"); | |
| 1401 } | |
| 1402 | |
| 1403 void | |
| 1404 enter1() | |
| 1405 { | |
| 1406 func_disp_label=fwdlabel(); | |
| 1407 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1408 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1409 } | |
| 1410 | |
| 1411 void | |
| 1412 leave(int control, char *name) | |
| 1413 { | |
| 128 | 1414 int sz; |
| 1415 | |
| 1416 disp &= -size_of_int; | |
| 61 | 1417 if (control) |
| 108 | 1418 code_set_return_register(1); |
| 61 | 1419 if (retcont) { |
| 1420 if (control) | |
| 1421 jmp(retlabel); | |
| 1422 fwddef(retcont); | |
| 128 | 1423 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1424 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1425 } else if (cadr(fnptr->ty)>0&&( | |
| 1426 car(cadr(fnptr->ty))==STRUCT || | |
| 1427 car(cadr(fnptr->ty))==UNION)) { | |
| 1428 sz = size(cadr(fnptr->ty)); | |
| 1429 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1430 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1431 register_name(creg,0)); | |
| 1432 emit_copy(dreg,creg,sz,0,1,1); | |
| 1433 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1434 use_register(creg,REG_EAX,0); | |
| 1435 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1436 } | |
| 61 | 1437 } |
| 1438 fwddef(retlabel); | |
| 63 | 1439 |
| 61 | 1440 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1441 printf("\tpopl %%edi\n"); | |
| 1442 printf("\tpopl %%esi\n"); | |
| 1443 printf("\tpopl %%ebx\n"); | |
| 1444 printf("\tleave\n"); | |
| 1445 printf("\tret\n"); | |
| 1446 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1447 printf("_%d:\n",labelno); | |
| 1448 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1449 local_table(); | |
| 1450 labelno++; | |
| 1451 free_all_register(); | |
| 1452 } | |
| 1453 | |
| 1454 | |
| 1455 void | |
| 108 | 1456 code_set_fixed_creg(int mode,int type) { |
| 1457 if (type==FLOAT||type==DOUBLE) { | |
| 1458 } else | |
| 1459 use_register(creg,REG_EAX,mode); | |
| 61 | 1460 } |
| 1461 | |
| 1462 void | |
| 107 | 1463 code_set_return_register(int mode) { |
| 1464 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1465 } else { | |
| 1466 use_register(creg,REG_EAX,mode); | |
| 1467 } | |
| 1468 } | |
| 1469 | |
| 1470 void | |
| 61 | 1471 gen_gdecl(char *n, int gpc) |
| 1472 { | |
| 1473 /* | |
| 1474 if (stmode!=STATIC) | |
| 1475 printf(".globl %s\n",n); | |
| 1476 */ | |
| 1477 } | |
| 1478 | |
| 1479 void | |
| 1480 align(int t) | |
| 1481 { | |
| 1482 if (t!=CHAR) { | |
| 1483 if (data_alignment & 1) | |
| 1484 printf("\t.align 2\n"); | |
| 1485 data_alignment = 0; | |
| 1486 } | |
| 1487 } | |
| 1488 | |
| 1489 void | |
| 1490 emit_data(int e, int t, NMTBL *n) | |
| 1491 { | |
| 1492 int l; | |
| 82 | 1493 double d; |
| 1494 float f; | |
| 61 | 1495 char *name; |
| 1496 name = n->nm; | |
| 156 | 1497 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1498 error(-1); return; |
| 1499 } | |
| 66 | 1500 if (chk) return; |
| 61 | 1501 if (n->dsp != -1) { |
| 1502 n->dsp = -1; /* initiallized flag */ | |
| 1503 printf(".globl\t%s\n",name); | |
| 1504 data_mode(name); | |
| 1505 align(t); | |
| 1506 printf("%s:\n",name); | |
| 1507 } else { | |
| 1508 data_mode(0); | |
| 1509 } | |
| 1510 if(car(e)==CONST) { | |
| 168 | 1511 if (t==CHAR||t==UCHAR) { |
| 61 | 1512 printf("\t.byte %d\n",cadr(e)); |
| 1513 if (data_alignment>0) | |
| 1514 data_alignment++; | |
| 1515 gpc += 1; | |
| 168 | 1516 } else if (t==SHORT||t==USHORT) { |
| 1517 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1518 if (data_alignment>0) data_alignment++; |
| 168 | 1519 gpc += size_of_short; |
| 61 | 1520 } else { |
| 1521 printf("\t.long %d\n",cadr(e)); | |
| 1522 gpc += size_of_int; | |
| 1523 } | |
| 82 | 1524 } else if(t==DOUBLE) { |
| 1525 d = dcadr(e); | |
| 1526 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1527 } else if(t==FLOAT) { | |
| 1528 f = dcadr(e); | |
| 1529 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 61 | 1530 } else if(t!=CHAR) { |
| 1531 gpc += size_of_int; | |
| 1532 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1533 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1534 } else if(car(e)==GVAR) { | |
| 1535 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1536 } else if(car(e)==FNAME) { |
| 1537 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1538 } else if(car(e)==STRING) { | |
| 1539 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1540 l = fwdlabel(); | |
| 1541 printf("\t.long _%d\n",l); | |
| 1542 printf(".section\t.rodata\n"); | |
| 1543 printf("_%d:\n",l); | |
| 1544 output_mode = RODATA_EMIT_MODE; | |
| 1545 } | |
| 1546 ascii((char *)cadr(e)); | |
| 1547 } else error(TYERR); | |
| 168 | 1548 } else error(TYERR); |
| 61 | 1549 } |
| 1550 | |
| 1551 void | |
| 1552 emit_data_closing(NMTBL *n) | |
| 1553 { | |
| 1554 int lb; | |
| 66 | 1555 if (chk) return; |
| 61 | 1556 if (mode==GDECL) { |
| 1557 data_mode(0); | |
| 1558 lb=fwdlabel(); | |
| 1559 printf("_%d:\n",lb); | |
| 1560 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1561 } | |
| 1562 } | |
| 1563 | |
| 1564 void | |
| 1565 global_table(void) | |
| 1566 { | |
| 1567 NMTBL *n; | |
| 1568 int init; | |
| 1569 init=0; | |
| 1570 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1571 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1572 /* n->dsp = -1 means initialized global */ |
| 1573 if (init==0) { | |
| 1574 data_mode(0); | |
| 1575 init=1; | |
| 1576 } | |
| 1577 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1578 } | |
| 1579 } | |
| 1580 } | |
| 1581 | |
| 1582 void | |
| 1583 local_table(void) | |
| 1584 { | |
| 1585 NMTBL *n; | |
| 1586 int init; | |
| 1587 init=0; | |
| 1588 /* static local variables */ | |
| 1589 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1590 if (n->sc == GVAR) { | |
| 1591 if (init==0) { | |
| 1592 data_mode(0); | |
| 1593 init=1; | |
| 1594 } | |
| 156 | 1595 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1596 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1597 } |
| 1598 } | |
| 1599 } | |
| 1600 | |
| 1601 void | |
| 1602 text_mode(void) | |
| 1603 { | |
| 1604 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1605 printf(".text\n"); | |
| 1606 printf("\t.align 2\n"); | |
| 1607 output_mode = TEXT_EMIT_MODE; | |
| 1608 } | |
| 1609 } | |
| 1610 | |
| 1611 void | |
| 1612 data_mode(char *name) | |
| 1613 { | |
| 1614 if (output_mode!=DATA_EMIT_MODE) { | |
| 1615 printf(".data\n"); | |
| 1616 output_mode = DATA_EMIT_MODE; | |
| 1617 } | |
| 1618 if (name) | |
| 1619 printf("\t.type\t%s,@object\n",name); | |
| 1620 } | |
| 1621 | |
| 81 | 1622 /* floating point */ |
| 1623 | |
| 1624 | |
| 82 | 1625 char * |
| 1626 fstore(int d) | |
| 1627 { | |
| 83 | 1628 return use? |
| 1629 (d?"fstl":"fsts"): | |
| 1630 (d?"fstpl":"fstps") | |
| 1631 ; | |
| 1632 } | |
| 1633 | |
| 1634 char * | |
| 1635 fstore_u(int d) | |
| 1636 { | |
| 82 | 1637 return d?"fstpl":"fstps"; |
| 1638 } | |
| 81 | 1639 |
| 82 | 1640 char * |
| 1641 fload(int d) | |
| 1642 { | |
| 1643 return d?"fldl":"flds"; | |
| 1644 } | |
| 81 | 1645 |
| 1646 | |
| 103 | 1647 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1648 { |
| 109 | 1649 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1650 } |
| 1651 | |
| 103 | 1652 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1653 { |
| 119 | 1654 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1655 } |
| 1656 | |
| 138 | 1657 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1658 { |
| 1659 error(-1); | |
| 1660 } | |
| 1661 | |
| 103 | 1662 void code_dassign(int e2,int freg,int d) |
| 82 | 1663 { |
| 1664 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1665 } | |
| 1666 | |
| 1667 static double d0 = 1.0; | |
| 81 | 1668 |
| 82 | 1669 int |
| 1670 code_d1(double d) | |
| 1671 { | |
| 1672 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1673 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1674 } | |
| 1675 | |
| 1676 int | |
| 1677 code_d2(double d) | |
| 1678 { | |
| 1679 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1680 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1681 } | |
| 1682 | |
| 138 | 1683 void code_dconst(int e2,int freg,int d) |
| 82 | 1684 { |
| 1685 int lb; | |
| 138 | 1686 double value = dcadr(e2); |
| 81 | 1687 |
| 138 | 1688 if (value==0.0) { |
| 82 | 1689 printf("\tfldz\n"); return; |
| 1690 } | |
| 138 | 1691 if (value==1.0) { |
| 82 | 1692 printf("\tfld1\n"); return; |
| 1693 } | |
| 1694 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1695 lb=fwdlabel(); | |
| 1696 printf("_%d:\n",lb); | |
| 138 | 1697 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1698 if (output_mode==TEXT_EMIT_MODE) { |
| 1699 printf(".text\n"); | |
| 1700 } else { | |
| 1701 text_mode(); | |
| 1702 } | |
| 1703 printf("\tfldl _%d\n",lb); | |
| 1704 } | |
| 1705 | |
| 138 | 1706 void code_dneg(int freg,int d) |
| 82 | 1707 { |
| 1708 printf("\tfchs\n"); | |
| 1709 } | |
| 81 | 1710 |
| 147 | 1711 void code_d2i(int freg) |
| 82 | 1712 { |
| 1713 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1714 printf("\tfnstcw (%%esp)\n"); | |
| 1715 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1716 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1717 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1718 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1719 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1720 printf("\tfldcw (%%esp)\n"); |
| 82 | 1721 printf("\tpopl %s\n",register_name(creg,0)); |
| 1722 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1723 } | |
| 81 | 1724 |
| 147 | 1725 void code_i2d(int creg) |
| 82 | 1726 { |
| 1727 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1728 printf("\tfildl (%%esp)\n"); | |
| 1729 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1730 } | |
| 1731 | |
| 147 | 1732 void code_d2u(int freg) |
| 85 | 1733 { |
| 86 | 1734 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1735 printf("\tfnstcw (%%esp)\n"); |
| 1736 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1737 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1738 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1739 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1740 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1741 printf("\tfldcw (%%esp)\n"); |
| 86 | 1742 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1743 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1744 } |
| 1745 | |
| 147 | 1746 void code_u2d(int creg) |
| 85 | 1747 { |
| 86 | 1748 printf("\tpushl %s\n",register_name(creg,0)); |
| 1749 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1750 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1751 printf("\tfildll (%%esp)\n"); | |
| 1752 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1753 } |
| 1754 | |
| 133 | 1755 void code_d2f(int freg) { } |
| 1756 void code_f2d(int freg) { } | |
| 147 | 1757 void code_f2i(int freg) { code_d2i(freg); } |
| 1758 void code_f2u(int freg) { code_d2u(freg); } | |
| 1759 void code_i2f(int creg) { code_i2d(creg); } | |
| 1760 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1761 |
| 107 | 1762 void code_drgvar(int e2,int d,int freg) |
| 82 | 1763 { |
| 109 | 1764 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1765 } |
| 81 | 1766 |
| 1767 | |
| 107 | 1768 void code_drlvar(int e2,int d,int freg) |
| 82 | 1769 { |
| 119 | 1770 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1771 } |
| 1772 | |
| 138 | 1773 void code_cmp_drgvar(int e2,int d) |
| 82 | 1774 { |
| 109 | 1775 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1776 } |
| 1777 | |
| 138 | 1778 void code_cmp_drlvar(int e2,int d) |
| 82 | 1779 { |
| 119 | 1780 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1781 } |
| 1782 | |
| 1783 void dtosop(int op,int e1) | |
| 94 | 1784 { |
| 82 | 1785 switch(op) { |
| 133 | 1786 case FADD: |
| 82 | 1787 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1788 case FSUB: |
| 85 | 1789 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1790 case FDIV: |
| 85 | 1791 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1792 case FMUL: |
| 82 | 1793 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1794 case FCMP: |
| 89 | 1795 case DCMP: |
| 82 | 1796 printf("\tfucompp\n"); |
| 1797 printf("\tfnstsw\t%%ax\n"); | |
| 1798 break; | |
| 1799 } | |
| 1800 } | |
| 81 | 1801 |
| 83 | 1802 void |
| 1803 code_dassop(int op,int d) { | |
| 1804 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1805 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1806 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1807 dtosop(op,0); | |
| 1808 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1809 } | |
| 1810 | |
| 1811 void | |
| 107 | 1812 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1813 g_expr(e2); |
| 1814 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1815 printf("\tfld1\n"); | |
| 87 | 1816 if (caddr(e1)>0) |
| 83 | 1817 printf("\tfaddp %%st,%%st(1)\n"); |
| 1818 else | |
| 1819 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1820 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1821 } | |
| 1822 | |
| 1823 void | |
| 107 | 1824 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1825 g_expr(e2); |
| 1826 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1827 if (use) | |
| 86 | 1828 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1829 printf("\tfld1\n"); |
| 87 | 1830 if (caddr(e1)>0) |
| 83 | 1831 printf("\tfaddp %%st,%%st(1)\n"); |
| 1832 else | |
| 1833 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1834 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1835 } |
| 1836 | |
| 84 | 1837 void |
| 1838 drexpr(int e1, int e2,int l1, int op) | |
| 1839 { | |
| 89 | 1840 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1841 switch(op) { |
| 1842 case DOP+GE: | |
| 133 | 1843 case FOP+GE: |
| 84 | 1844 printf("\ttestb\t$5,%%ah\n"); |
| 1845 printf("\tjne\t_%d\n",l1); | |
| 1846 break; | |
| 1847 case DOP+GT: | |
| 133 | 1848 case FOP+GT: |
| 84 | 1849 printf("\ttestb\t$69,%%ah\n"); |
| 1850 printf("\tjne\t_%d\n",l1); | |
| 1851 break; | |
| 1852 case DOP+EQ: | |
| 133 | 1853 case FOP+EQ: |
| 84 | 1854 printf("\tandb\t$69,%%ah\n"); |
| 1855 printf("\txorb\t$64,%%ah\n"); | |
| 1856 printf("\tjne\t_%d\n",l1); | |
| 1857 break; | |
| 1858 case DOP+NEQ: | |
| 133 | 1859 case FOP+NEQ: |
| 84 | 1860 printf("\tandb\t$69,%%ah\n"); |
| 1861 printf("\txorb\t$64,%%ah\n"); | |
| 1862 printf("\tje\t_%d\n",l1); | |
| 1863 break; | |
| 1864 } | |
| 1865 } | |
| 1866 | |
| 94 | 1867 void |
| 138 | 1868 code_dregister(int e2,int freg,int d) |
| 94 | 1869 { |
| 1870 error(-1); | |
| 1871 } | |
| 1872 | |
| 138 | 1873 void |
| 1874 code_cmp_dregister(int e2,int d) | |
| 94 | 1875 { |
| 1876 error(-1); | |
| 82 | 1877 } |
| 81 | 1878 |
| 97 | 1879 int pop_fregister() |
| 82 | 1880 { |
| 94 | 1881 if (freg_sp<0) { error(-1); return -1;} |
| 1882 printf("# fpop: %d\n",freg_sp-1); | |
| 1883 return freg_stack[--freg_sp]; | |
| 82 | 1884 } |
| 81 | 1885 |
| 94 | 1886 int |
| 138 | 1887 emit_dpop(int d) |
| 94 | 1888 { |
| 1889 int xreg; | |
| 97 | 1890 if ((xreg=pop_fregister())==-1) { |
| 94 | 1891 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 1892 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 1893 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 1894 /* pushed order is reversed. We don't need this for comutable |
| 1895 operator, but it is ok to do this. */ | |
| 1896 printf("\tfxch\t%%st(1)\n"); | |
| 1897 } | |
| 1898 return xreg; | |
| 1899 } | |
| 1900 | |
| 1901 | |
| 138 | 1902 void emit_dpop_free(int e1,int d) |
| 82 | 1903 { |
| 1904 } | |
| 81 | 1905 |
| 133 | 1906 void emit_dpush(int type) |
| 82 | 1907 { |
| 119 | 1908 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 1909 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 1910 freg_stack[freg_sp++]=-1; |
| 94 | 1911 printf("# fpush:%d\n",freg_sp); |
| 1912 } | |
| 1913 | |
| 1914 void | |
| 1915 code_save_stacks() | |
| 1916 { | |
| 1917 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 1918 int xreg,sp,screg; | |
| 1919 sp=reg_sp; | |
| 1920 while(sp-->0) { | |
| 1921 if ((xreg=reg_stack[sp])>=0) { | |
| 1922 screg=creg; | |
| 1923 if(creg!=xreg) { | |
| 1924 if (xreg!=dreg) free_register(xreg); | |
| 1925 creg = xreg; | |
| 1926 } | |
| 1927 code_assign_lvar( | |
| 119 | 1928 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 1929 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 1930 regv[xreg]=0; | |
| 1931 creg=screg; | |
| 1932 } | |
| 1933 } | |
| 107 | 1934 code_save_fstacks(); |
| 1935 } | |
| 1936 | |
| 1937 void | |
| 1938 code_save_fstacks() | |
| 1939 { | |
| 127 | 1940 int xreg,sp,uses; |
| 1941 uses = use; use = 0; | |
| 94 | 1942 sp=freg_sp; |
| 1943 while(sp-->0) { | |
| 1944 if ((xreg=freg_stack[sp])==-1) { | |
| 1945 code_dassign_lvar( | |
| 119 | 1946 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 1947 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 1948 } | |
| 1949 } | |
| 127 | 1950 use = uses; |
| 82 | 1951 } |
| 81 | 1952 |
| 61 | 1953 /* end */ |