Mercurial > hg > CbC > old > device
annotate mc-code-ia32.c @ 205:a50f90d0b63a
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| author | kono |
|---|---|
| date | Thu, 15 Apr 2004 01:01:51 +0900 |
| parents | 4c614334f3d0 |
| children | 32f54ab63b35 |
| 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 | |
| 205 | 112 static int ia32regs[REAL_MAX_REGISTER]; |
| 113 static int ia32regv[REAL_MAX_REGISTER]; | |
| 114 static int ia32rname[REAL_MAX_REGISTER]; | |
| 95 | 115 |
| 205 | 116 static int *regv = ia32regv; |
| 117 static int *regs = ia32regs; | |
| 95 | 118 static int *rname = ia32rname; |
| 119 | |
| 205 | 120 static int ia32fregs[1]; |
| 121 static int ia32fregv[1]; | |
| 95 | 122 |
| 205 | 123 static int freg; |
| 124 static int *fregv = ia32fregv; | |
| 125 static int *fregs = ia32fregs; | |
| 95 | 126 |
| 61 | 127 |
| 128 #define REG_EAX 0 | |
| 129 #define REG_EBX 1 | |
| 130 #define REG_ECX 2 | |
| 131 #define REG_EDX 3 | |
| 132 #define REG_ESI 4 | |
| 133 #define REG_EDI 5 | |
| 134 #define REG_EBP 6 | |
| 135 #define REG_ESP 7 | |
| 136 | |
| 137 | |
| 138 #define DATA_REG 0 | |
| 139 #define POINTER_REG 3 | |
| 140 static char *reg_name[8]; | |
| 141 static char *reg_name_l[4]; | |
| 142 static char *reg_name_w[4]; | |
| 143 | |
| 93 | 144 static void use_register(int virt, int real, int move); |
| 145 static int virtual(int real); | |
| 146 static void shift(char *op, int reg); | |
| 163 | 147 static void ld_indexx(int byte, int n, int xreg,int sign); |
| 93 | 148 static void data_mode(char *name); |
| 149 static int edx_setup(); | |
| 150 static void edx_cleanup(); | |
| 151 static void local_table(void); | |
| 195 | 152 #if FLOAT_CODE |
| 93 | 153 static char * fload(int d); |
| 154 static int code_d1(double d); | |
| 155 static int code_d2(double d); | |
| 195 | 156 static void code_save_fstacks(); |
| 157 #endif | |
| 94 | 158 static void code_save_stacks(); |
| 82 | 159 |
| 61 | 160 void |
| 161 code_init(void) | |
| 162 { | |
| 173 | 163 macro_define("__i386__ 1\n"); |
| 182 | 164 macro_define("__LITTLE_ENDIAN__ 1\n"); |
| 165 macro_define("__STDC__ 1\n"); | |
| 166 macro_define("size_t int\n"); | |
| 167 macro_define("__externsion__\n"); | |
| 168 macro_define("__flexarr\n"); | |
| 183 | 169 macro_define("__builtin_va_list int*\n"); |
| 170 macro_define("wchar_t int\n"); | |
| 173 | 171 |
| 61 | 172 arg_offset = 8; |
| 173 func_disp_offset = -12; | |
| 174 disp_offset = -12; | |
| 175 size_of_int = 4; | |
| 176 endian = 0; | |
| 177 MAX_REGISTER=6; | |
| 178 MAX_DATA_REG=4; | |
| 179 MAX_POINTER=3; | |
| 180 MAX_REGISTER_VAR=2; | |
| 181 | |
| 182 reg_name[REG_EAX] = "%eax"; | |
| 183 reg_name[REG_EBX] = "%ebx"; | |
| 184 reg_name[REG_ECX] = "%ecx"; | |
| 185 reg_name[REG_EDX] = "%edx"; | |
| 186 reg_name[REG_ESI] = "%esi"; | |
| 187 reg_name[REG_EDI] = "%edi"; | |
| 188 reg_name[REG_EBP] = "%ebp"; | |
| 189 reg_name[REG_ESP] = "%esp"; | |
| 190 reg_name_l[REG_EAX] = "%al"; | |
| 191 reg_name_l[REG_EBX] = "%bl"; | |
| 192 reg_name_l[REG_ECX] = "%cl"; | |
| 193 reg_name_l[REG_EDX] = "%dl"; | |
| 194 reg_name_w[REG_EAX] = "%ax"; | |
| 195 reg_name_w[REG_EBX] = "%bx"; | |
| 196 reg_name_w[REG_ECX] = "%cx"; | |
| 197 reg_name_w[REG_EDX] = "%dx"; | |
| 198 | |
| 199 } | |
| 200 | |
| 201 char * | |
| 202 register_name(int i,int byte) | |
| 203 { | |
| 204 if (i<0) { | |
| 205 error(REG_ERR); | |
| 206 return "%eax"; | |
| 207 } | |
| 165 | 208 if (byte==1 && rname[i] <= REG_EDX) { |
| 61 | 209 return reg_name_l[rname[i]]; |
| 165 | 210 } else if (byte==size_of_short && rname[i] <= REG_EDX) { |
| 211 return reg_name_w[rname[i]]; | |
| 61 | 212 } else { |
| 168 | 213 return reg_name[rname[i]]; /* 0 or 4 means int */ |
| 61 | 214 } |
| 215 } | |
| 216 | |
| 147 | 217 int use_int(int i) { return i;} |
| 218 int use_float(int i) { return i;} | |
| 219 int use_double(int i) { return i;} | |
| 195 | 220 int use_longlong(int i) { return i; } |
| 221 | |
| 147 | 222 |
| 61 | 223 void |
| 224 gexpr_code_init(void){ | |
| 225 use_register(creg,REG_EAX,0); | |
| 94 | 226 regv[creg]=0; |
| 61 | 227 regv[dreg]=0; |
| 228 } | |
| 229 | |
| 147 | 230 void |
| 231 code_gexpr(int e){ | |
| 232 } | |
| 233 | |
| 89 | 234 int |
| 235 get_register(void) | |
| 236 { /* 使われていないレジスタを調べる */ | |
| 237 int i; | |
| 238 for(i=0;i<MAX_REGISTER;i++) { | |
| 239 if (! regs[i]) { /* 使われていないなら */ | |
| 240 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 241 return i; /* その場所を表す番号を返す */ | |
| 242 } | |
| 243 } | |
| 244 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 245 } | |
| 246 | |
| 247 void | |
| 248 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 249 regv[i]=regs[i]=0; | |
| 250 } | |
| 251 | |
| 99 | 252 int |
| 126 | 253 get_input_register_var(int i,NMTBL *nptr,int is_code) |
| 99 | 254 { |
| 126 | 255 if (is_code) { |
| 256 if (i>=MAX_CODE_INPUT_REGISTER_VAR) return 0; | |
| 257 i = virtual(i+REG_ESI); | |
| 258 regs[i]=regv[i]=1; | |
| 259 return list3(REGISTER,i,(int)nptr); | |
| 260 } else { | |
| 261 return 0; | |
| 262 } | |
| 99 | 263 } |
| 103 | 264 |
| 99 | 265 int |
| 138 | 266 get_input_dregister_var(int i,NMTBL *nptr,int is_code,int d) |
| 99 | 267 { |
| 126 | 268 return 0; |
| 99 | 269 } |
| 270 | |
| 271 int | |
| 138 | 272 get_dregister(int d) |
| 99 | 273 { |
| 274 return -1; | |
| 275 } | |
| 276 | |
| 195 | 277 int |
| 278 get_lregister_var(NMTBL *n) | |
| 279 { | |
| 204 | 280 return list2(LVAR,new_lvar(size_of_longlong)); |
| 195 | 281 } |
| 282 | |
| 205 | 283 int |
| 284 get_lregister() | |
| 285 { | |
| 286 return -1; | |
| 287 } | |
| 288 | |
| 289 | |
| 89 | 290 int |
| 291 register_full(void) | |
| 292 { | |
| 293 int i; | |
| 294 for(i=0;i<MAX_REGISTER;i++) { | |
| 295 if (! regs[i]) { | |
| 296 return 0; | |
| 297 } | |
| 298 } | |
| 299 return 1; | |
| 300 } | |
| 301 | |
| 302 int | |
| 137 | 303 free_register_count(int d) |
| 89 | 304 { |
| 305 int i,count; | |
| 306 count = 0; | |
| 307 for(i=0;i<MAX_REGISTER;i++) { | |
| 308 if (! regs[i] && ! regv[i]) count++; | |
| 309 } | |
| 137 | 310 return d?0:count; |
| 89 | 311 } |
| 312 | |
| 313 void | |
| 314 free_all_register(void) | |
| 315 { | |
| 316 int i; | |
| 317 for(i=0;i<MAX_REGISTER;i++) { | |
| 318 regs[i]=regv[i]=0; | |
| 319 } | |
| 320 creg = get_register(); | |
| 321 dreg = get_register(); | |
| 322 return; | |
| 323 } | |
| 324 | |
| 325 | |
| 326 void | |
| 327 register_usage(char *s) | |
| 328 { | |
| 329 int i; | |
| 330 if (chk) return; | |
| 331 printf("# %d: %s:",lineno,s); | |
| 332 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 333 for(i=0;i<MAX_REGISTER;i++) { | |
| 334 printf("%d",regs[i]); | |
| 335 } | |
| 336 printf(":"); | |
| 337 for(i=0;i<MAX_REGISTER;i++) { | |
| 338 printf("%d",regv[i]); | |
| 339 } | |
| 340 #if 0 | |
| 341 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 342 for(i=reg_sp;i>=0;i--) { | |
| 343 if(reg_stack[i]>=0) | |
| 344 printf(" %s",register_name(reg_stack[i],0)); | |
| 345 } | |
| 346 #endif | |
| 94 | 347 printf(" f:%d",freg_sp); |
| 89 | 348 printf("\n"); |
| 349 } | |
| 350 | |
| 109 | 351 void |
| 137 | 352 code_arg_register(NMTBL *fnptr) |
| 109 | 353 { |
| 137 | 354 int args = fnptr->dsp; |
| 355 NMTBL *n; | |
| 356 int reg_var = 0; | |
| 357 int freg_var = 0; | |
| 358 int type; | |
| 359 int reg; | |
| 360 int is_code0 = is_code(fnptr); | |
| 361 | |
| 362 while (args) { | |
| 363 /* process in reverse order */ | |
| 364 n = (NMTBL*)caddr(args); | |
| 365 type = n->ty; | |
| 366 if (scalar(type)) { | |
| 367 if ((reg = get_input_register_var(reg_var,n,is_code0))) { | |
| 368 n->sc = REGISTER; | |
| 369 n->dsp = cadr(reg); | |
| 370 regv[n->dsp]= 1; | |
| 371 regs[n->dsp]= INPUT_REG; | |
| 372 reg_var++; | |
| 373 cadddr(args)=size_of_int; /* why we need this? */ | |
| 374 } | |
| 375 } else if (type==FLOAT||type==DOUBLE) { | |
| 138 | 376 if ((reg = get_input_dregister_var(freg_var,n,is_code0,1))) { |
| 137 | 377 n->sc = DREGISTER; |
| 378 n->dsp = cadr(reg); | |
| 379 fregv[n->dsp]= 1; | |
| 380 fregs[n->dsp]= INPUT_REG; | |
| 381 freg_var++; | |
| 382 cadddr(args)=size(type); /* why we need this? */ | |
| 383 } | |
| 384 } | |
| 385 args = cadr(args); | |
| 386 } | |
| 109 | 387 } |
| 388 | |
| 89 | 389 void |
| 390 gexpr_init(void) | |
| 391 { | |
| 392 while(reg_sp > 0) { | |
| 94 | 393 if (reg_stack[--reg_sp]>=0) |
| 394 free_register(reg_stack[reg_sp]); | |
| 89 | 395 } |
| 94 | 396 freg_sp = 0; |
| 89 | 397 text_mode(); |
| 398 gexpr_code_init(); | |
| 399 register_usage("gexpr_init"); | |
| 400 } | |
| 401 | |
| 402 | |
| 403 void | |
| 404 emit_init(void) | |
| 405 { | |
| 406 int i; | |
| 407 for(i=0;i<MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} | |
| 408 free_all_register(); | |
| 409 reg_sp = 0; | |
| 94 | 410 freg_sp = 0; |
| 89 | 411 text_mode(); |
| 412 } | |
| 413 | |
| 414 int | |
| 415 virtual(int real) | |
| 416 { | |
| 417 int real_v,i; | |
| 418 real_v = -1; | |
| 419 for(i=0;i<MAX_REGISTER;i++) { | |
| 420 if (rname[i]==real) { | |
| 421 real_v=i; | |
| 422 break; | |
| 423 } | |
| 424 } | |
| 425 return real_v; | |
| 426 } | |
| 427 | |
| 428 int | |
| 429 pop_register(void) | |
| 430 { /* レジスタから値を取り出す */ | |
| 431 return reg_stack[--reg_sp]; | |
| 432 } | |
| 433 | |
| 434 void | |
| 435 emit_pop_free(int xreg) | |
| 436 { | |
| 159 | 437 if (xreg==dreg||xreg==creg) { |
| 89 | 438 regv[dreg]=0; |
| 98 | 439 } else if (xreg>=0) { |
| 89 | 440 free_register(xreg); |
| 441 } | |
| 442 } | |
| 443 | |
| 444 | |
| 61 | 445 int |
| 105 | 446 get_register_var(NMTBL *nptr) |
| 61 | 447 { |
| 448 int i; | |
| 449 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 450 if (! regs[i]) { /* 使われていないなら */ | |
| 451 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 452 regv[i]=0; | |
| 105 | 453 return list3(REGISTER,i,(int)nptr); /* その場所を表す番号を返す */ |
| 61 | 454 } |
| 455 } | |
| 104 | 456 return list2(LVAR,new_lvar(size_of_int)); |
| 457 } | |
| 458 | |
| 459 int | |
| 138 | 460 get_dregister_var(NMTBL *nptr,int d) |
| 104 | 461 { |
| 138 | 462 return list2(LVAR,new_lvar(d?size_of_double:size_of_float)); |
| 137 | 463 } |
| 464 | |
| 61 | 465 void |
| 466 use_register(int virt, int real, int move) | |
| 467 { | |
| 468 int real_v; | |
| 469 char *move_op; | |
| 470 if (rname[virt]==real) | |
| 471 return; | |
| 472 real_v = virtual(real); | |
| 473 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 474 if (move || (regv[real_v])) { | |
| 475 printf(move_op,reg_name[rname[virt]],reg_name[real]); | |
| 476 } | |
| 477 rname[real_v] = rname[virt]; | |
| 478 rname[virt] = real; | |
| 479 } | |
| 480 | |
| 481 void | |
| 482 use_pointer(int virt, int move) | |
| 483 { | |
| 484 int i; | |
| 485 if (rname[virt]>=POINTER_REG) | |
| 486 return; | |
| 487 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 488 if (!regs[virtual(i)]) { | |
| 489 use_register(virt,i,move); | |
| 490 return; | |
| 491 } | |
| 492 } | |
| 493 /* we prefer EBX */ | |
| 494 use_register(virt,REG_EBX,move); | |
| 495 } | |
| 496 | |
| 497 void | |
| 498 use_data_reg(int virt, int move) | |
| 499 { | |
| 500 int i; | |
| 501 if (rname[virt]<MAX_DATA_REG) | |
| 502 return; | |
| 503 for(i=0;i<MAX_DATA_REG;i++) { | |
| 504 if (!regs[virtual(i)]) { | |
| 505 use_register(virt,i,move); | |
| 506 return; | |
| 507 } | |
| 508 } | |
| 509 /* we prefer EBX */ | |
| 510 use_register(virt,REG_EBX,move); | |
| 511 } | |
| 512 | |
| 513 | |
| 514 void | |
| 107 | 515 emit_push() |
| 61 | 516 { |
| 517 int new_reg; | |
| 518 new_reg = get_register(); | |
| 159 | 519 if (new_reg==creg) error(-1); |
| 61 | 520 if(new_reg<0) { /* もうレジスタがない */ |
| 83 | 521 if (reg_sp>=MAX_MAX) error(-1); |
| 61 | 522 reg_stack[reg_sp++] = -1; |
| 523 printf("\tpushl %s\n",register_name(creg,0)); | |
| 524 /* creg is used soon, don't regv[creg]=0 */ | |
| 525 } else { | |
| 526 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 527 creg = new_reg; | |
| 528 regv[creg]=1; | |
| 529 } | |
| 530 } | |
| 531 | |
| 532 int | |
| 533 emit_pop(int type) | |
| 534 { | |
| 535 int xreg; | |
| 536 if ((xreg=pop_register())==-1) { | |
| 537 if (type==POINTER_REG) | |
| 538 use_pointer(dreg,0); | |
| 539 else if (type==DATA_REG) | |
| 540 use_data_reg(dreg,0); | |
| 541 if (regv[dreg]) { | |
| 542 printf("# emit_pop dreg conflict\n"); | |
| 94 | 543 error(-1); |
| 61 | 544 } |
| 545 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 94 | 546 regv[dreg]=1; |
| 547 return dreg; | |
| 548 } else if (xreg<= -REG_LVAR_OFFSET) { | |
| 119 | 549 code_rlvar(xreg+REG_LVAR_OFFSET,dreg); |
| 117 | 550 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 551 regv[dreg]=1; |
| 552 return dreg; | |
| 553 } | |
| 61 | 554 return xreg; |
| 555 } | |
| 556 | |
| 186 | 557 int |
| 558 stack_top(int type) | |
| 559 { | |
| 560 int xreg; | |
| 561 if (type==INT) { | |
| 562 xreg = reg_stack[reg_sp]; | |
| 563 if (xreg<= -REG_LVAR_OFFSET) { | |
| 564 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 565 } else { | |
| 566 return list2(REGISTER,xreg); | |
| 567 } | |
| 568 } else { | |
| 569 xreg = freg_stack[freg_sp]; | |
| 570 if (xreg<= -REG_LVAR_OFFSET) { | |
| 571 return list2(LVAR,REG_LVAR_OFFSET+xreg); | |
| 187 | 572 } else { |
| 186 | 573 return list2(DREGISTER,xreg); |
| 574 } | |
| 575 } | |
| 576 return xreg; | |
| 577 } | |
| 578 | |
| 579 | |
| 580 | |
| 92 | 581 void |
| 582 code_label(int labelno) | |
| 583 { | |
| 584 printf("_%d:\n",labelno); | |
| 585 } | |
| 61 | 586 |
| 587 void | |
| 107 | 588 code_gvar(int e1,int creg) { |
| 109 | 589 printf("\tmovl $%s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 590 regv[creg]=1; |
| 61 | 591 } |
| 592 | |
| 593 | |
| 594 void | |
| 107 | 595 code_rgvar(int e1,int creg) { |
| 109 | 596 printf("\tmovl %s,%s\n",((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 597 regv[creg]=1; |
| 61 | 598 } |
| 166 | 599 static char *cload(int sign,int sz) { return sz==1?(sign?"movsbl":"movzbl"):sz==size_of_short?(sign?"movswl":"movzwl"):"movl"; } |
| 61 | 600 void |
| 165 | 601 code_crgvar(int e1,int creg,int sign,int sz){ |
| 602 printf("\t%s %s,%s\n",cload(sign,sz), | |
| 163 | 603 ((NMTBL*)cadr(e1))->nm,register_name(creg,0)); |
| 107 | 604 regv[creg]=1; |
| 61 | 605 } |
| 606 | |
| 607 | |
| 608 void | |
| 107 | 609 code_lvar(int e2,int creg) { |
| 119 | 610 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 107 | 611 regv[creg]=1; |
| 61 | 612 } |
| 613 | |
| 614 | |
| 615 void | |
| 107 | 616 code_register(int e2,int creg) { |
| 61 | 617 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); |
| 107 | 618 regv[creg]=1; |
| 61 | 619 } |
| 620 | |
| 621 | |
| 622 void | |
| 94 | 623 code_rlvar(int e2,int reg) { |
| 119 | 624 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(reg,0)); |
| 107 | 625 regv[creg]=1; |
| 61 | 626 } |
| 627 | |
| 628 | |
| 629 void | |
| 165 | 630 code_crlvar(int e2,int reg,int sign,int sz) { |
| 631 printf("\t%s %d(%%ebp),%s\n",cload(sign,sz),lvar(e2),register_name(reg,0)); | |
| 107 | 632 regv[creg]=1; |
| 61 | 633 } |
| 634 | |
| 635 | |
| 636 void | |
| 109 | 637 code_fname(NMTBL *n,int creg) { |
| 638 printf("\tmovl $%s,%s\n",n->nm,register_name(creg,0)); | |
| 107 | 639 regv[creg]=1; |
| 61 | 640 } |
| 641 | |
| 642 | |
| 643 void | |
| 107 | 644 code_const(int e2,int creg) { |
| 61 | 645 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 107 | 646 regv[creg]=1; |
| 61 | 647 } |
| 648 | |
| 649 | |
| 650 void | |
| 107 | 651 code_neg(int creg) { |
| 61 | 652 printf("\tnegl %s\n", register_name(creg,0)); |
| 653 } | |
| 654 | |
| 655 | |
| 656 void | |
| 107 | 657 code_not(int creg) { |
| 61 | 658 printf("\tnotl %s\n", register_name(creg,0)); |
| 659 } | |
| 660 | |
| 661 | |
| 662 void | |
| 107 | 663 code_lnot(int creg) { |
| 61 | 664 char *xrn; |
| 665 use_data_reg(creg,1); | |
| 666 xrn = register_name(creg,1); | |
| 667 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 668 printf("\tsete %s\n", xrn); | |
| 669 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 670 } | |
| 671 | |
| 672 void | |
| 168 | 673 code_preinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 674 char *xrn; |
| 675 if (car(e2)==REGISTER) { | |
| 168 | 676 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 677 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 678 regv[reg]=1; | |
| 61 | 679 return; |
| 680 } | |
| 681 g_expr(e2); | |
| 682 xrn = register_name(creg,0); | |
| 168 | 683 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 684 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); | |
| 61 | 685 } |
| 686 | |
| 687 | |
| 688 void | |
| 168 | 689 code_postinc(int e1,int e2,int dir,int sign,int sz,int reg) { |
| 61 | 690 char *xrn; |
| 691 if (car(e2)==REGISTER) { | |
| 107 | 692 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(reg,0)); |
| 168 | 693 printf("\taddl $%d,%s\n",dir,register_name(cadr(e2),0)); |
| 107 | 694 regv[reg]=1; |
| 61 | 695 return; |
| 696 } | |
| 697 g_expr(e2); | |
| 698 emit_push(); | |
| 699 xrn = register_name((e2=emit_pop(0)),0); | |
| 165 | 700 printf("\t%s (%s),%s\n",cload(sign,sz),xrn,register_name(creg,0)); |
| 168 | 701 printf("\t%s $%d,(%s)\n",(sz==1)?"addb":(sz==size_of_short)?"addw":"addl",dir,xrn); |
| 61 | 702 emit_pop_free(e2); |
| 703 } | |
| 704 | |
| 705 | |
| 706 | |
| 707 void | |
| 107 | 708 code_return(int creg) { |
| 61 | 709 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 107 | 710 regv[creg]=1; |
| 61 | 711 } |
| 712 | |
| 713 | |
| 714 void | |
| 107 | 715 code_environment(int creg) { |
| 61 | 716 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 107 | 717 regv[creg]=1; |
| 61 | 718 } |
| 719 | |
| 720 | |
| 721 void | |
| 116 | 722 code_bool(int e1) { |
| 61 | 723 char *xrn; |
| 724 int e2,e3; | |
| 725 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ | |
| 726 xrn = register_name(creg,0); | |
| 727 printf("\txorl %s,%s\n",xrn,xrn); | |
| 728 jmp(e3=fwdlabel()); | |
| 729 fwddef(e2); | |
| 730 printf("\tmovl $1,%s\n",xrn); | |
| 731 fwddef(e3); | |
| 107 | 732 regv[creg]=1; |
| 61 | 733 } |
| 734 | |
| 735 char * | |
| 736 code_gt(int cond) { | |
| 737 return (cond?"g":"le"); | |
| 738 } | |
| 739 | |
| 740 char * | |
| 741 code_ugt(int cond) { | |
| 742 return (cond?"a":"be"); | |
| 743 } | |
| 744 | |
| 745 char * | |
| 746 code_ge(int cond) { | |
| 747 return (cond?"ge":"l"); | |
| 748 } | |
| 749 | |
| 750 char * | |
| 751 code_uge(int cond) { | |
| 752 return (cond?"ae":"b"); | |
| 753 } | |
| 754 | |
| 755 char * | |
| 756 code_eq(int cond) { | |
| 757 return (cond?"e":"ne"); | |
| 758 } | |
| 759 | |
| 760 void | |
| 167 | 761 code_cmp_crgvar(int e1,int sz) { |
| 762 if (sz==1) | |
| 763 printf("\tcmpb $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 764 else if (sz==size_of_short) | |
| 765 printf("\tcmpw $0,%s\n",((NMTBL*)cadr(e1))->nm); | |
| 61 | 766 } |
| 767 | |
| 768 | |
| 769 void | |
| 167 | 770 code_cmp_crlvar(int e1,int sz) { |
| 771 if (sz==1) | |
| 772 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e1)); | |
| 773 else if (sz==size_of_short) | |
| 774 printf("\tcmpw $0,%d(%%ebp)\n",lvar(e1)); | |
| 61 | 775 } |
| 776 | |
| 777 | |
| 778 void | |
| 779 code_cmp_rgvar(int e1) { | |
| 109 | 780 printf("\tcmpl $0,%s\n",((NMTBL*)cadr(e1))->nm); |
| 61 | 781 } |
| 782 | |
| 783 | |
| 784 void | |
| 785 code_cmp_rlvar(int e1) { | |
| 119 | 786 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e1)); |
| 61 | 787 } |
| 788 | |
| 789 | |
| 790 void | |
| 791 code_cmp_register(int e2) { | |
| 792 printf("\tcmpl $0,%s\n",register_name(e2,0)); | |
| 793 } | |
| 794 | |
| 795 | |
| 796 void | |
| 797 ascii(char *s) | |
| 798 { | |
| 799 printf("\t.string \""); | |
| 800 while(*s) { | |
| 801 if (*s=='\n') | |
| 802 printf("%cn",92); | |
| 803 else if (*s<' ') | |
| 804 printf("%c%03o",92,*s); | |
| 805 else if (*s==34) | |
| 806 printf("%c%c",92,34); | |
| 807 else | |
| 808 printf("%c",*s); | |
| 809 s++; | |
| 810 } | |
| 811 printf("%c\n",34); | |
| 812 } | |
| 813 | |
| 814 void | |
| 107 | 815 code_string(int e1,int creg) |
| 61 | 816 { |
| 817 char *s; | |
| 818 int i,lb; | |
| 819 | |
| 820 if (0) { | |
| 821 s=(char *)cadr(e1); | |
| 822 lb=fwdlabel(); | |
| 823 printf("\tjmp _%d\n",lb); | |
| 824 i=backdef(); | |
| 825 ascii(s); | |
| 826 printf("\t.align 2\n"); | |
| 827 fwddef(lb); | |
| 828 printf("\tlea _%d,%s\n",i,register_name(creg,0)); | |
| 829 } else { | |
| 830 s=(char *)cadr(e1); | |
| 831 printf(".section\t.rodata\n"); | |
| 832 lb=fwdlabel(); | |
| 833 printf("_%d:\n",lb); | |
| 834 ascii(s); | |
| 835 if (output_mode==TEXT_EMIT_MODE) { | |
| 836 printf(".text\n"); | |
| 837 } else { | |
| 838 text_mode(); | |
| 839 } | |
| 840 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); | |
| 841 } | |
| 842 } | |
| 843 | |
| 844 #define MAX_COPY_LEN 20 | |
| 845 | |
| 846 void | |
| 847 emit_copy(int from,int to,int length,int offset,int value,int det) | |
| 848 { | |
| 849 int fix = 0; | |
| 850 /* length <0 means upward direction copy */ | |
| 851 switch (length) { | |
| 852 case 0: break; | |
| 853 case 1: case -1: | |
| 854 printf("\tmovb %d(%s),%s\n",offset, | |
| 855 register_name(from,0), reg_name_l[rname[dreg]] ); | |
| 856 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset, | |
| 857 register_name(to,0)); | |
| 858 break; | |
| 859 case 2: case -2: | |
| 860 printf("\tmovw %d(%s),%s\n",offset, | |
| 861 register_name(from,0), reg_name_w[rname[dreg]] ); | |
| 862 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset, | |
| 863 register_name(to,0)); | |
| 864 break; | |
| 865 case 4: case -4: | |
| 866 printf("\tmovl %d(%s),%s\n",offset, | |
| 867 register_name(from,0), register_name(dreg,0)); | |
| 868 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset, | |
| 869 register_name(to,0)); | |
| 870 break; | |
| 871 default: | |
| 872 if (-MAX_COPY_LEN<length && length <0) { | |
| 873 for(;length<=4;length+=4,offset-=4) | |
| 874 emit_copy(from,to,4,offset,0,det); | |
| 875 for(;length<=2;length+=2,offset-=2) | |
| 876 emit_copy(from,to,2,offset,0,det); | |
| 877 if(length>0) | |
| 878 emit_copy(from,to,length,offset,0,det); | |
| 879 break; | |
| 880 } else if (length <=MAX_COPY_LEN) { | |
| 881 for(;length>=4;length-=4,offset+=4) | |
| 882 emit_copy(from,to,4,offset,0,det); | |
| 883 for(;length>=2;length-=2,offset+=2) | |
| 884 emit_copy(from,to,2,offset,0,det); | |
| 885 if(length>0) | |
| 886 emit_copy(from,to,length,offset,0,det); | |
| 887 break; | |
| 888 } | |
| 889 if (det) { | |
| 890 /* | |
| 891 call bcopy | |
| 892 g_expr(list3(FUNCTION,,); | |
| 893 break; | |
| 894 */ | |
| 895 } | |
| 896 use_register(from,REG_ESI,1); | |
| 897 use_register(to, REG_EDI,1); | |
| 898 use_register(dreg,REG_ECX,0); | |
| 899 if (length<0) { | |
| 900 printf("\tmovl $%d,%%ecx\n",-length/4); | |
| 901 printf("\taddl $%d,%%esi\n",-length); | |
| 902 printf("\taddl $%d,%%edi\n",-length); | |
| 903 printf("\tstd\n\trep\n\tmovsl\n"); | |
| 904 if(length%4) { | |
| 905 emit_copy(from,to,length,offset+length/4,0,det); | |
| 906 } | |
| 907 } else { | |
| 908 printf("\tmovl $%d,%%ecx\n",length/4); | |
| 909 fix = (length/4)*4; | |
| 910 printf("\tcld\n\trep\n\tmovsl\n"); | |
| 911 if(length%4) { | |
| 912 emit_copy(from,to,length,offset+length/4,0,det); | |
| 913 } | |
| 914 } | |
| 915 } | |
| 916 if (value) { | |
| 917 /* creg must point top of the destination data */ | |
| 918 /* this code is necessary for the value of assignment or function call */ | |
| 919 /* otherwise we don't need this */ | |
| 920 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 921 if(creg!=to) { | |
| 922 if (to==dreg) | |
| 923 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 924 else { | |
| 925 free_register(creg); creg=to; | |
| 926 } | |
| 927 } | |
| 928 } | |
| 929 regv[from]=regv[to]=regv[dreg]=0; | |
| 930 regv[creg]=1; | |
| 931 } | |
| 932 | |
| 933 int | |
| 934 struct_push(int e4,int t) | |
| 935 { | |
| 81 | 936 int length,xreg,save,lreg,count; |
| 61 | 937 g_expr(e4); |
| 938 length=size(t); | |
| 939 if(length%size_of_int) { | |
| 940 length += size_of_int - (length%size_of_int); | |
| 941 } | |
| 81 | 942 for(count=0;length<MAX_COPY_LEN;count++,length-=size_of_int) { |
| 943 if (length==0) return count; | |
| 944 else { | |
| 945 printf("\tpushl %d(%s)\n", | |
| 946 length-size_of_int,register_name(creg,0)); | |
| 947 } | |
| 61 | 948 } |
| 949 printf("\tsubl $%d,%%esp\n",length); | |
| 950 if (register_full()) { | |
| 951 save = 1; | |
| 952 for(lreg=0;lreg==creg||lreg==dreg;lreg++); | |
| 953 printf("\tpushl %s\n",register_name(lreg,0)); | |
| 954 xreg = lreg; regv[xreg]=0; | |
| 955 } else { | |
| 956 save=0; | |
| 957 xreg = get_register(); | |
| 958 } | |
| 959 if (save) | |
| 960 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); | |
| 961 else | |
| 962 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); | |
| 963 regv[xreg]=1; | |
| 964 /* downward direction copy */ | |
| 965 emit_copy(creg,xreg,length,0,0,1); | |
| 966 /* we have value in creg, it may be changed */ | |
| 967 if (save) { | |
| 968 if(creg==xreg) { | |
| 969 creg = get_register(); /* creg is freed in emit_copy */ | |
| 970 } | |
| 971 printf("\tpopl %s\n",register_name(xreg,0)); | |
| 972 regv[xreg]=1; | |
| 973 } else | |
| 974 free_register(xreg); | |
| 975 return length/size_of_int; | |
| 976 } | |
| 977 | |
| 94 | 978 int |
| 61 | 979 function(int e1) |
| 980 { | |
| 127 | 981 int e2,e3,e4,nargs,t,ret_type; |
| 982 NMTBL *n=0; | |
| 61 | 983 int save,saved; |
|
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984 ret_type = cadr(cadddr(e1)); |
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985 if (ret_type==CHAR) ret_type=INT; |
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|
986 |
| 94 | 987 #ifdef SAVE_STACKS |
| 988 code_save_stacks(); | |
| 989 #endif | |
| 137 | 990 if (free_register_count(0)<1) { |
| 61 | 991 for(save = 0;save==dreg||save==creg;save++); |
| 992 printf("\tpushl %s\n",register_name(save,0)); | |
| 993 saved = 1; | |
| 994 } else { | |
| 995 save = get_register(); | |
| 996 saved = 0; | |
| 997 } | |
| 998 regv[save]=0; | |
| 999 e2 = cadr(e1); | |
| 1000 nargs = 0; | |
| 1001 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 1002 t=caddr(e3); | |
| 127 | 1003 e4 = car(e3); |
| 61 | 1004 if(scalar(t)) { |
| 1005 g_expr(e4); | |
| 1006 printf("\tpushl %s\n",register_name(creg,0)); | |
| 82 | 1007 } else if (t==DOUBLE) { |
| 1008 g_expr(e4); | |
| 1009 printf("\tleal\t-8(%%esp),%%esp\n\tfstpl\t(%%esp)\n"); | |
| 85 | 1010 nargs += size_of_double/size_of_int; |
| 83 | 1011 fregv[freg]=0; |
| 82 | 1012 continue; |
| 1013 } else if (t==FLOAT) { | |
| 1014 g_expr(e4); | |
| 1015 printf("\tleal\t-4(%%esp),%%esp\n\tfstps\t(%%esp)\n"); | |
| 85 | 1016 nargs += size_of_float/size_of_int; |
| 83 | 1017 fregv[freg]=0; |
| 82 | 1018 continue; |
| 61 | 1019 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 1020 nargs += struct_push(e4,t); | |
| 1021 continue; | |
| 1022 } else { | |
| 1023 error(TYERR); | |
| 1024 } | |
| 1025 ++nargs; | |
| 1026 } | |
| 1027 if (car(e2) == FNAME) { | |
| 1028 n=(NMTBL *)cadr(e2); | |
| 78 | 1029 regv[creg]=0; |
| 1030 use_register(creg,REG_EAX,0); /* will be destroyed */ | |
| 61 | 1031 } else { |
| 1032 g_expr(e2); | |
| 78 | 1033 regv[creg]=1; |
| 1034 use_register(creg,REG_EAX,1); /* will be destroyed */ | |
| 61 | 1035 } |
| 1036 | |
| 1037 /* we don't have to save creg nor dreg */ | |
| 1038 regs[creg]=0; regs[dreg]=0; | |
| 78 | 1039 regv[dreg]= regv[save]= 0; |
| 61 | 1040 use_register(dreg,REG_EDX,0); /* will be destroyed */ |
| 1041 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 1042 regs[creg]=1; regs[dreg]=1; | |
| 1043 | |
| 1044 if (car(e2) == FNAME) { | |
| 1045 printf("\tcall\t%s\n",n->nm); | |
| 1046 } else { | |
| 1047 printf("\tcall\t*%s\n",register_name(creg,0)); | |
| 1048 } | |
| 1049 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); | |
| 1050 if (saved) { | |
| 1051 printf("\tpopl %s\n",register_name(save,0)); | |
| 1052 } else { | |
| 1053 free_register(save); | |
| 1054 } | |
| 1055 regv[save]=0; | |
| 105 | 1056 if (ret_type==DOUBLE||ret_type==FLOAT) { |
| 94 | 1057 fregv[freg]=1; regv[creg]=0; |
| 105 | 1058 } else if (ret_type==VOID) { |
| 94 | 1059 fregv[freg]=0; regv[creg]=0; |
| 1060 } else { | |
| 1061 fregv[freg]=0; regv[creg]=1; | |
| 1062 } | |
| 105 | 1063 return ret_type; |
| 61 | 1064 } |
| 1065 | |
| 1066 void | |
| 1067 code_frame_pointer(int e3) { | |
| 1068 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1069 } | |
| 1070 | |
| 1071 | |
| 1072 void | |
| 62 | 1073 code_fix_frame_pointer(int disp_offset) { |
| 61 | 1074 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); |
| 1075 } | |
| 1076 | |
| 1077 | |
| 1078 void | |
| 1079 code_jmp(char *s) { | |
| 1080 printf("\tjmp %s\n",s); | |
| 1081 } | |
| 1082 | |
| 1083 | |
| 1084 void | |
| 1085 code_indirect_jmp(int e2) { | |
| 1086 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1087 } | |
| 1088 | |
| 94 | 1089 int |
| 196 | 1090 code_rindirect(int e1, int offset, int us) |
| 1091 { | |
| 1092 char *crn,*op; | |
| 1093 int byte; | |
| 1094 g_expr(e1); | |
| 1095 byte = 0; op="movl"; | |
| 1096 crn = register_name(creg,0); | |
| 1097 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1098 return us?UNSIGNED:INT; | |
| 1099 } | |
| 1100 | |
| 1101 int | |
| 1102 code_crindirect(int e1, int offset, int us) | |
| 61 | 1103 { |
| 196 | 1104 char *crn,*op; |
| 1105 int byte; | |
| 1106 g_expr(e1); | |
| 1107 byte = 0; op=us?"movzbl":"movsbl"; | |
| 1108 crn = register_name(creg,0); | |
| 1109 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1110 return us?UCHAR:CHAR; | |
| 1111 } | |
| 1112 | |
| 1113 int | |
| 1114 code_srindirect(int e1, int offset, int us) | |
| 1115 { | |
| 1116 char *crn,*op; | |
| 1117 int byte; | |
| 1118 g_expr(e1); | |
| 1119 byte = 0; op=us?"movzwl":"movswl"; | |
| 1120 crn = register_name(creg,0); | |
| 1121 printf("\t%s %d(%s),%s\n",op,offset,crn,crn); | |
| 1122 return us?USHORT:SHORT; | |
| 1123 } | |
| 1124 | |
| 195 | 1125 #if FLOAT_CODE |
| 196 | 1126 int |
| 1127 code_drindirect(int e1, int offset, int d) | |
| 1128 { | |
| 1129 g_expr(e1); | |
| 1130 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1131 return DOUBLE; | |
| 1132 } | |
| 195 | 1133 #endif |
| 196 | 1134 |
| 1135 #if LONGLONG_CODE | |
| 1136 int | |
| 1137 code_lrindirect(int e1, int offset, int us) | |
| 1138 { | |
| 203 | 1139 return LONGLONG; |
| 61 | 1140 } |
| 196 | 1141 #endif |
| 61 | 1142 |
| 1143 char * | |
| 1144 move(int byte) | |
| 1145 { | |
| 165 | 1146 return byte==1?"movb":byte==size_of_short?"movw":"movl"; |
| 61 | 1147 } |
| 1148 | |
| 1149 void | |
| 103 | 1150 code_assign_gvar(int e2,int creg,int byte) { |
| 61 | 1151 if (byte) use_data_reg(creg,1); |
| 109 | 1152 printf("\t%s %s,%s\n",move(byte),register_name(creg,byte),((NMTBL*)cadr(e2))->nm); |
| 61 | 1153 } |
| 1154 | |
| 1155 void | |
| 103 | 1156 code_assign_lvar(int e2,int creg,int byte) { |
| 61 | 1157 if (byte) use_data_reg(creg,1); |
| 119 | 1158 printf("\t%s %s,%d(%%ebp)\n",move(byte),register_name(creg,byte),lvar(e2)); |
| 61 | 1159 } |
| 1160 | |
| 1161 void | |
| 111 | 1162 code_assign_register(int e2,int byte,int creg) { |
| 61 | 1163 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(e2,0)); |
| 1164 } | |
| 1165 | |
| 1166 void | |
| 118 | 1167 code_assign(int e2,int byte,int creg) { |
| 95 | 1168 if (byte) use_data_reg(creg,1); |
| 61 | 1169 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(e2,0)); |
| 144 | 1170 regv[creg]=1; |
| 61 | 1171 } |
| 1172 | |
| 1173 void | |
| 1174 code_register_assop(int e2,int op,int byte) { | |
| 1175 int reg; | |
| 1176 int xreg = creg; | |
| 1177 creg = reg = e2; | |
| 1178 tosop(op,xreg); | |
| 1179 creg = xreg; | |
| 1180 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 159 | 1181 regs[creg]=regv[creg]=1; |
| 61 | 1182 } |
| 1183 | |
| 1184 | |
| 1185 void | |
| 163 | 1186 code_assop(int op,int byte,int sign) { |
| 61 | 1187 char *xrn; |
| 1188 int xreg; | |
| 1189 int edx = edx_setup(); | |
| 1190 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ | |
| 1191 regv[xreg]=regs[xreg]=1; | |
| 1192 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1193 regv[edx]=1; | |
| 163 | 1194 ld_indexx(byte,0,edx,sign); |
| 61 | 1195 tosop(op,xreg); |
| 165 | 1196 printf("\t%s %s,(%s)\n",move(byte),register_name(creg,byte),register_name(edx,0)); |
| 61 | 1197 edx_cleanup(); |
| 1198 emit_pop_free(xreg); | |
| 144 | 1199 regv[creg]=1; |
| 61 | 1200 } |
| 1201 | |
| 1202 | |
| 1203 void | |
| 1204 tosop(int op,int oreg) | |
| 1205 { | |
| 1206 int dx; | |
| 1207 char *orn,*crn; | |
| 1208 | |
| 1209 switch(op) { | |
| 1210 case LSHIFT: | |
| 1211 case ULSHIFT: | |
| 1212 shift("sall",oreg); | |
| 144 | 1213 regv[creg]=1; |
| 61 | 1214 return; |
| 1215 case RSHIFT: | |
| 1216 shift("sarl",oreg); | |
| 144 | 1217 regv[creg]=1; |
| 61 | 1218 return; |
| 1219 case URSHIFT: | |
| 1220 shift("shrl",oreg); | |
| 144 | 1221 regv[creg]=1; |
| 61 | 1222 return; |
| 1223 } | |
| 1224 if(oreg==-1) { | |
| 1225 printf("\tpopl %s\n",register_name(dreg,0)); | |
| 1226 oreg = dreg; | |
| 1227 regv[dreg]=1; | |
| 94 | 1228 } else if (oreg<= -REG_LVAR_OFFSET) { |
| 119 | 1229 code_rlvar(oreg+REG_LVAR_OFFSET,dreg); |
| 117 | 1230 free_lvar(oreg+REG_LVAR_OFFSET); |
| 94 | 1231 oreg = dreg; |
| 1232 regv[dreg]=1; | |
| 61 | 1233 } |
| 1234 regv[oreg]=1; regs[oreg]=1; | |
| 1235 orn = register_name(oreg,0); | |
| 1236 crn = register_name(creg,0); | |
| 1237 switch(op) { | |
| 1238 case ADD: | |
| 1239 printf("\taddl %s,%s\n",orn,crn); | |
| 1240 break; | |
| 89 | 1241 case SUB: case CMP: |
| 61 | 1242 printf("\tsubl %s,%s\n",orn,crn); |
| 1243 break; | |
| 1244 case BAND: | |
| 1245 printf("\tandl %s,%s\n",orn,crn); | |
| 1246 break; | |
| 1247 case EOR: | |
| 1248 printf("\txorl %s,%s\n",orn,crn); | |
| 1249 break; | |
| 1250 case BOR: | |
| 1251 printf("\torl %s,%s\n",orn,crn); | |
| 1252 break; | |
| 1253 case MUL: | |
| 1254 case UMUL: | |
| 1255 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 1256 break; | |
| 1257 case DIV: | |
| 1258 case UDIV: | |
| 1259 use_register(creg,REG_EAX,1); | |
| 1260 edx_setup(); | |
| 1261 orn = register_name(oreg,0); | |
| 1262 if (op==DIV) | |
| 127 | 1263 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1264 else |
| 127 | 1265 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1266 edx_cleanup(); |
| 1267 break; | |
| 1268 case MOD: | |
| 1269 case UMOD: | |
| 1270 use_register(creg,REG_EAX,1); | |
| 1271 edx_setup(); | |
| 1272 orn = register_name(oreg,0); | |
| 1273 if (op==DIV) | |
| 127 | 1274 printf("\tcltd\n\tidivl %s\n",orn); |
| 61 | 1275 else |
| 127 | 1276 printf("\txor %%edx,%%edx\n\tdivl %s\n",orn); |
| 61 | 1277 dx = virtual(REG_EDX); |
| 1278 if (dx!=creg) { | |
| 1279 rname[dx]=rname[creg]; | |
| 1280 rname[creg]=REG_EDX; | |
| 1281 } | |
| 1282 edx_cleanup(); | |
| 1283 break; | |
| 1284 } | |
| 159 | 1285 if (oreg!=dreg&&oreg!=creg&&oreg>=0) |
| 61 | 1286 free_register(oreg); |
| 94 | 1287 else if (oreg==dreg) regv[dreg]=0; |
| 144 | 1288 regv[creg]=1; |
| 61 | 1289 } |
| 1290 | |
| 189 | 1291 int |
| 1292 code_const_op_p(int op,int v) | |
| 1293 { | |
| 190 | 1294 if (op==DIV||op==UDIV||op==MOD||op==UMOD) return 0; |
| 189 | 1295 else return 1; |
| 1296 } | |
| 1297 | |
| 1298 void | |
| 1299 oprtc(int op,int orn) | |
| 1300 { | |
| 1301 char *crn = register_name(creg,0); | |
| 1302 | |
| 1303 switch(op) { | |
| 1304 case LSHIFT: | |
| 1305 case ULSHIFT: | |
| 1306 printf("\tsall $%d,%s\n",orn,crn); | |
| 1307 return; | |
| 1308 case RSHIFT: | |
| 1309 printf("\tsarl $%d,%s\n",orn,crn); | |
| 1310 return; | |
| 1311 case URSHIFT: | |
| 1312 printf("\tshrl $%d,%s\n",orn,crn); | |
| 1313 return; | |
| 1314 case ADD: | |
| 1315 printf("\taddl $%d,%s\n",orn,crn); | |
| 1316 break; | |
| 1317 case SUB: case CMP: | |
| 1318 printf("\tsubl $%d,%s\n",orn,crn); | |
| 1319 break; | |
| 1320 case BAND: | |
| 1321 printf("\tandl $%d,%s\n",orn,crn); | |
| 1322 break; | |
| 1323 case EOR: | |
| 1324 printf("\txorl $%d,%s\n",orn,crn); | |
| 1325 break; | |
| 1326 case BOR: | |
| 1327 printf("\torl $%d,%s\n",orn,crn); | |
| 1328 break; | |
| 1329 case MUL: | |
| 1330 case UMUL: | |
| 1331 printf("\t%s $%d,%s\n","imull",orn,crn); | |
| 1332 break; | |
| 1333 default: | |
| 1334 error(-1); | |
| 1335 } | |
| 1336 } | |
| 1337 | |
| 1338 | |
| 61 | 1339 static int edx_stack=0; |
| 1340 | |
| 1341 int | |
| 1342 edx_setup() | |
| 1343 { | |
| 1344 int edx_save; | |
| 1345 /* make real EDX register empty */ | |
| 137 | 1346 if (free_register_count(0)<1) { |
| 61 | 1347 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); |
| 1348 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1349 edx_stack = list3(edx_save,edx_stack,0); | |
| 1350 } else { | |
| 1351 edx_save = get_register(); | |
| 1352 edx_stack = list3(edx_save,edx_stack,1); | |
| 1353 } | |
| 1354 regv[edx_save]=0; | |
| 1355 use_register(edx_save,REG_EDX,0); | |
| 1356 return edx_save; | |
| 1357 } | |
| 1358 | |
| 1359 | |
| 1360 void | |
| 1361 edx_cleanup() | |
| 1362 { | |
| 1363 if (caddr(edx_stack)==0) { | |
| 1364 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1365 } else | |
| 1366 free_register(car(edx_stack)); | |
| 1367 edx_stack = cadr(edx_stack); | |
| 1368 } | |
| 1369 | |
| 1370 void | |
| 1371 shift(char *op, int reg) | |
| 1372 { | |
| 1373 if (reg>=0) { | |
| 1374 use_register(reg,REG_ECX,1); | |
| 103 | 1375 } else if (reg<= -REG_LVAR_OFFSET) { |
| 1376 use_register(dreg,REG_ECX,0); | |
| 119 | 1377 code_rlvar(reg+REG_LVAR_OFFSET,dreg); |
| 103 | 1378 reg = dreg; |
| 1379 regv[dreg]=0; | |
| 61 | 1380 } else { |
| 1381 use_register(dreg,REG_ECX,0); | |
| 1382 printf("\tpopl %%ecx\n"); | |
| 103 | 1383 regv[dreg]=0; |
| 61 | 1384 } |
| 1385 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); | |
| 1386 } | |
| 1387 | |
| 1388 void | |
| 163 | 1389 ld_indexx(int byte, int n, int xreg,int sign) |
| 61 | 1390 { |
| 1391 char *op; | |
| 1392 | |
| 166 | 1393 op = byte ? (sign?"movsbl":"movzbl") : "movl"; |
| 61 | 1394 if (n) |
| 95 | 1395 printf("\t%s %d(%s),%s\n",op,n, |
| 1396 register_name(xreg,0),register_name(creg,byte)); | |
| 61 | 1397 else |
| 95 | 1398 printf("\t%s (%s),%s\n",op, |
| 1399 register_name(xreg,0),register_name(creg,byte)); | |
| 1400 } | |
| 1401 | |
| 1402 int | |
| 1403 code_csvalue() | |
| 1404 { | |
| 123 | 1405 return rname[creg]; /* for switch value */ |
| 61 | 1406 } |
| 1407 | |
| 1408 void | |
| 95 | 1409 code_cmpdimm(int e, int csreg) |
| 61 | 1410 { |
| 1411 /* used in dosiwtch() */ | |
| 66 | 1412 if(chk) return; |
| 123 | 1413 use_register(creg,csreg,0); |
| 61 | 1414 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 1415 } | |
| 1416 | |
| 1417 void | |
| 66 | 1418 code_opening(char *filename) |
| 61 | 1419 { |
| 1420 printf("\t.file \"%s\"\n",filename); | |
| 1421 printf("\t.version\t\"01.01\"\n"); | |
| 66 | 1422 /* printf("gcc2_compiled.:\n"); */ |
| 61 | 1423 printf(".text\n"); |
| 1424 } | |
| 1425 | |
| 1426 void | |
| 66 | 1427 code_closing() |
| 61 | 1428 { |
| 78 | 1429 global_table(); |
| 61 | 1430 printf("\t.ident \"Micro-C compiled\"\n"); |
| 1431 } | |
| 1432 | |
| 1433 void | |
| 89 | 1434 rexpr(int e1, int l1, char *s,int t) |
| 61 | 1435 { |
| 89 | 1436 g_expr(list3(CMP,cadr(e1),caddr(e1))); |
| 61 | 1437 printf("\tj%s\t_%d\n",s,l1); |
| 1438 } | |
| 1439 | |
| 82 | 1440 |
| 1441 void | |
| 61 | 1442 jcond(int l, char cond) |
| 1443 { | |
| 66 | 1444 if (chk) return; |
| 61 | 1445 printf("\tj%s\t_%d\n",cond?"ne":"e",l); |
| 1446 } | |
| 1447 | |
| 1448 void | |
| 1449 jmp(int l) | |
| 1450 { | |
| 1451 control=0; | |
| 66 | 1452 if (chk) return; |
| 61 | 1453 printf("\tjmp\t_%d\n",l); |
| 1454 /* align? */ | |
| 1455 /* | |
| 1456 this is not allowed because of ? operator | |
| 1457 regv[creg]=regv[dreg]=0; | |
| 1458 use_register(creg,REG_EAX,0); | |
| 1459 use_register(dreg,REG_EBX,0); | |
| 1460 */ | |
| 1461 } | |
| 1462 | |
| 1463 void | |
| 1464 gen_comment(char *s) | |
| 1465 { | |
| 66 | 1466 if (chk) return; |
| 1467 printf("## %s",s); | |
| 61 | 1468 } |
| 1469 | |
| 1470 | |
| 1471 void | |
| 1472 code_enter(char *name) | |
| 1473 { | |
| 1474 printf("\t.align 4\n"); | |
| 1475 if (stmode!=STATIC) | |
| 1476 printf(".globl %s\n",name); | |
| 1477 printf("\t.type\t%s,@function\n",name); | |
| 1478 printf("%s:\n",name); | |
| 1479 } | |
| 1480 | |
| 77 | 1481 |
| 61 | 1482 void |
| 1483 code_enter1(int args) | |
| 1484 { | |
| 1485 code_disp_label=fwdlabel(); | |
| 1486 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); | |
| 1487 | |
| 1488 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); | |
| 1489 } | |
| 1490 | |
| 1491 void | |
| 1492 code_leave(char *name) | |
| 1493 { | |
| 63 | 1494 disp&= -size_of_int; |
| 61 | 1495 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 1496 printf("_%d:\n",labelno); | |
| 1497 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1498 local_table(); | |
| 1499 labelno++; | |
| 1500 free_all_register(); | |
| 1501 } | |
| 1502 | |
| 1503 void | |
| 1504 enter(char *name) | |
| 1505 { | |
| 1506 printf("\t.align 2\n"); | |
| 1507 if (stmode!=STATIC) | |
| 1508 printf(".globl %s\n",name); | |
| 1509 printf("%s:\n",name); | |
| 1510 printf("\t.type\t%s,@function\n",name); | |
| 1511 printf("\tpushl %%ebp\n"); | |
| 1512 printf("\tmovl %%esp,%%ebp\n"); | |
| 1513 printf("\tpushl %%ebx\n"); | |
| 1514 printf("\tpushl %%esi\n"); | |
| 1515 printf("\tpushl %%edi\n"); | |
| 1516 } | |
| 1517 | |
| 1518 void | |
| 1519 enter1() | |
| 1520 { | |
| 182 | 1521 text_mode(); |
| 61 | 1522 func_disp_label=fwdlabel(); |
| 1523 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); | |
| 1524 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 1525 } | |
| 1526 | |
| 1527 void | |
| 1528 leave(int control, char *name) | |
| 1529 { | |
| 128 | 1530 int sz; |
| 1531 | |
| 1532 disp &= -size_of_int; | |
| 61 | 1533 if (control) |
| 108 | 1534 code_set_return_register(1); |
| 61 | 1535 if (retcont) { |
| 1536 if (control) | |
| 1537 jmp(retlabel); | |
| 1538 fwddef(retcont); | |
| 128 | 1539 if (cadr(fnptr->ty)==FLOAT||cadr(fnptr->ty)==DOUBLE) { |
| 1540 printf("\tfldl %d(%%ebp)\n",-size_of_double); | |
| 1541 } else if (cadr(fnptr->ty)>0&&( | |
| 1542 car(cadr(fnptr->ty))==STRUCT || | |
| 1543 car(cadr(fnptr->ty))==UNION)) { | |
| 1544 sz = size(cadr(fnptr->ty)); | |
| 1545 printf("\tlea %d(%%ebp),%s\n",-sz,register_name(dreg,0)); | |
| 1546 printf("\tmovl %d(%%ebp),%s\n",disp-size_of_int, | |
| 1547 register_name(creg,0)); | |
| 1548 emit_copy(dreg,creg,sz,0,1,1); | |
| 1549 } else if (cadr(fnptr->ty)!=VOID) { | |
| 1550 use_register(creg,REG_EAX,0); | |
| 1551 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); | |
| 1552 } | |
| 61 | 1553 } |
| 1554 fwddef(retlabel); | |
| 63 | 1555 |
| 61 | 1556 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 1557 printf("\tpopl %%edi\n"); | |
| 1558 printf("\tpopl %%esi\n"); | |
| 1559 printf("\tpopl %%ebx\n"); | |
| 1560 printf("\tleave\n"); | |
| 1561 printf("\tret\n"); | |
| 1562 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); | |
| 1563 printf("_%d:\n",labelno); | |
| 1564 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 1565 local_table(); | |
| 1566 labelno++; | |
| 1567 free_all_register(); | |
| 1568 } | |
| 1569 | |
| 187 | 1570 int |
| 1571 code_get_fixed_creg(int reg,int type) { | |
| 1572 if (type==FLOAT||type==DOUBLE) { | |
| 1573 return 0; | |
| 1574 } else { | |
| 1575 return rname[reg]; | |
| 1576 } | |
| 1577 } | |
| 61 | 1578 |
| 1579 void | |
| 187 | 1580 code_set_fixed_creg(int reg,int mode,int type) { |
| 108 | 1581 if (type==FLOAT||type==DOUBLE) { |
| 187 | 1582 } else { |
| 1583 use_register(creg,reg,mode); | |
| 1584 } | |
| 61 | 1585 } |
| 1586 | |
| 1587 void | |
| 107 | 1588 code_set_return_register(int mode) { |
| 1589 if (fnptr->ty==DOUBLE||fnptr->ty==FLOAT) { | |
| 1590 } else { | |
| 1591 use_register(creg,REG_EAX,mode); | |
| 1592 } | |
| 1593 } | |
| 1594 | |
| 1595 void | |
| 61 | 1596 gen_gdecl(char *n, int gpc) |
| 1597 { | |
| 1598 /* | |
| 1599 if (stmode!=STATIC) | |
| 1600 printf(".globl %s\n",n); | |
| 1601 */ | |
| 1602 } | |
| 1603 | |
| 1604 void | |
| 1605 align(int t) | |
| 1606 { | |
| 1607 if (t!=CHAR) { | |
| 1608 if (data_alignment & 1) | |
| 1609 printf("\t.align 2\n"); | |
| 1610 data_alignment = 0; | |
| 1611 } | |
| 1612 } | |
| 1613 | |
| 1614 void | |
| 1615 emit_data(int e, int t, NMTBL *n) | |
| 1616 { | |
| 1617 int l; | |
| 195 | 1618 #if FLOAT_CODE |
| 82 | 1619 double d; |
| 1620 float f; | |
| 195 | 1621 #endif |
| 61 | 1622 char *name; |
| 1623 name = n->nm; | |
| 156 | 1624 if(mode!=GDECL && mode!=STADECL) { |
| 61 | 1625 error(-1); return; |
| 1626 } | |
| 66 | 1627 if (chk) return; |
| 61 | 1628 if (n->dsp != -1) { |
| 1629 n->dsp = -1; /* initiallized flag */ | |
| 1630 printf(".globl\t%s\n",name); | |
| 1631 data_mode(name); | |
| 1632 align(t); | |
| 1633 printf("%s:\n",name); | |
| 1634 } else { | |
| 1635 data_mode(0); | |
| 1636 } | |
| 1637 if(car(e)==CONST) { | |
| 168 | 1638 if (t==CHAR||t==UCHAR) { |
| 61 | 1639 printf("\t.byte %d\n",cadr(e)); |
| 1640 if (data_alignment>0) | |
| 1641 data_alignment++; | |
| 1642 gpc += 1; | |
| 168 | 1643 } else if (t==SHORT||t==USHORT) { |
| 1644 printf("\t.short %d\n",cadr(e)); | |
| 82 | 1645 if (data_alignment>0) data_alignment++; |
| 168 | 1646 gpc += size_of_short; |
| 61 | 1647 } else { |
| 1648 printf("\t.long %d\n",cadr(e)); | |
| 1649 gpc += size_of_int; | |
| 1650 } | |
| 195 | 1651 #if FLOAT_CODE |
| 82 | 1652 } else if(t==DOUBLE) { |
| 1653 d = dcadr(e); | |
| 1654 printf("\t.long\t0x%x,0x%x\n",code_d1(d),code_d2(d)); | |
| 1655 } else if(t==FLOAT) { | |
| 1656 f = dcadr(e); | |
| 1657 printf("\t.long\t0x%x\n",*(int *)&f); | |
| 195 | 1658 #endif |
| 61 | 1659 } else if(t!=CHAR) { |
| 1660 gpc += size_of_int; | |
| 1661 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 109 | 1662 printf("\t.long %s\n",((NMTBL *)cadr(cadr(e)))->nm); |
| 1663 } else if(car(e)==GVAR) { | |
| 1664 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 61 | 1665 } else if(car(e)==FNAME) { |
| 1666 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1667 } else if(car(e)==STRING) { | |
| 1668 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1669 l = fwdlabel(); | |
| 1670 printf("\t.long _%d\n",l); | |
| 1671 printf(".section\t.rodata\n"); | |
| 1672 printf("_%d:\n",l); | |
| 1673 output_mode = RODATA_EMIT_MODE; | |
| 1674 } | |
| 1675 ascii((char *)cadr(e)); | |
| 1676 } else error(TYERR); | |
| 168 | 1677 } else error(TYERR); |
| 61 | 1678 } |
| 1679 | |
| 1680 void | |
| 1681 emit_data_closing(NMTBL *n) | |
| 1682 { | |
| 1683 int lb; | |
| 66 | 1684 if (chk) return; |
| 61 | 1685 if (mode==GDECL) { |
| 1686 data_mode(0); | |
| 1687 lb=fwdlabel(); | |
| 1688 printf("_%d:\n",lb); | |
| 1689 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1690 } | |
| 1691 } | |
| 1692 | |
| 1693 void | |
| 1694 global_table(void) | |
| 1695 { | |
| 1696 NMTBL *n; | |
| 1697 int init; | |
| 1698 init=0; | |
| 1699 for(n=ntable;n < &ntable[GSYMS];n++) { | |
| 117 | 1700 if ((n->sc == GVAR||n->sc == STATIC) && n->dsp != -1) { |
| 61 | 1701 /* n->dsp = -1 means initialized global */ |
| 1702 if (init==0) { | |
| 1703 data_mode(0); | |
| 1704 init=1; | |
| 1705 } | |
| 1706 printf(".comm %s,%d\n",n->nm,size(n->ty)); | |
| 1707 } | |
| 1708 } | |
| 1709 } | |
| 1710 | |
| 1711 void | |
| 1712 local_table(void) | |
| 1713 { | |
| 1714 NMTBL *n; | |
| 1715 int init; | |
| 1716 init=0; | |
| 1717 /* static local variables */ | |
| 1718 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1719 if (n->sc == GVAR) { | |
| 1720 if (init==0) { | |
| 1721 data_mode(0); | |
| 1722 init=1; | |
| 1723 } | |
| 156 | 1724 if (n->dsp!= -1) /* -1 means initialized global */ |
| 1725 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); | |
| 61 | 1726 } |
| 1727 } | |
| 1728 } | |
| 1729 | |
| 1730 void | |
| 1731 text_mode(void) | |
| 1732 { | |
| 1733 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1734 printf(".text\n"); | |
| 1735 printf("\t.align 2\n"); | |
| 1736 output_mode = TEXT_EMIT_MODE; | |
| 1737 } | |
| 1738 } | |
| 1739 | |
| 1740 void | |
| 1741 data_mode(char *name) | |
| 1742 { | |
| 1743 if (output_mode!=DATA_EMIT_MODE) { | |
| 1744 printf(".data\n"); | |
| 1745 output_mode = DATA_EMIT_MODE; | |
| 1746 } | |
| 1747 if (name) | |
| 1748 printf("\t.type\t%s,@object\n",name); | |
| 1749 } | |
| 1750 | |
| 195 | 1751 #if FLOAT_CODE |
| 1752 | |
| 81 | 1753 /* floating point */ |
| 1754 | |
| 1755 | |
| 82 | 1756 char * |
| 1757 fstore(int d) | |
| 1758 { | |
| 83 | 1759 return use? |
| 1760 (d?"fstl":"fsts"): | |
| 1761 (d?"fstpl":"fstps") | |
| 1762 ; | |
| 1763 } | |
| 1764 | |
| 1765 char * | |
| 1766 fstore_u(int d) | |
| 1767 { | |
| 82 | 1768 return d?"fstpl":"fstps"; |
| 1769 } | |
| 81 | 1770 |
| 82 | 1771 char * |
| 1772 fload(int d) | |
| 1773 { | |
| 1774 return d?"fldl":"flds"; | |
| 1775 } | |
| 81 | 1776 |
| 1777 | |
| 103 | 1778 void code_dassign_gvar(int e2,int freg,int d) |
| 82 | 1779 { |
| 109 | 1780 printf("\t%s %s\n",fstore(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1781 } |
| 1782 | |
| 103 | 1783 void code_dassign_lvar(int e2,int freg,int d) |
| 82 | 1784 { |
| 119 | 1785 printf("\t%s %d(%%ebp)\n",fstore(d),lvar(e2)); |
| 82 | 1786 } |
| 1787 | |
| 138 | 1788 void code_dassign_dregister(int e,int d,int freg) |
| 111 | 1789 { |
| 1790 error(-1); | |
| 1791 } | |
| 1792 | |
| 103 | 1793 void code_dassign(int e2,int freg,int d) |
| 82 | 1794 { |
| 1795 printf("\t%s (%s)\n",fstore(d),register_name(e2,0)); | |
| 1796 } | |
| 1797 | |
| 1798 static double d0 = 1.0; | |
| 81 | 1799 |
| 82 | 1800 int |
| 1801 code_d1(double d) | |
| 1802 { | |
| 1803 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1804 return (i[1] == 0x3ff00000)?j[0]:j[1]; | |
| 1805 } | |
| 1806 | |
| 1807 int | |
| 1808 code_d2(double d) | |
| 1809 { | |
| 1810 int *i = (int *)&d0; int *j = (int *)&d; | |
| 1811 return (i[1] == 0x3ff00000)?j[1]:j[0]; | |
| 1812 } | |
| 1813 | |
| 138 | 1814 void code_dconst(int e2,int freg,int d) |
| 82 | 1815 { |
| 1816 int lb; | |
| 138 | 1817 double value = dcadr(e2); |
| 81 | 1818 |
| 138 | 1819 if (value==0.0) { |
| 82 | 1820 printf("\tfldz\n"); return; |
| 1821 } | |
| 138 | 1822 if (value==1.0) { |
| 82 | 1823 printf("\tfld1\n"); return; |
| 1824 } | |
| 1825 printf(" \t.section\t.rodata\n\t.align 8\n"); | |
| 1826 lb=fwdlabel(); | |
| 1827 printf("_%d:\n",lb); | |
| 138 | 1828 printf("\t.long\t0x%x,0x%x\n",code_d1(value),code_d2(value)); |
| 82 | 1829 if (output_mode==TEXT_EMIT_MODE) { |
| 1830 printf(".text\n"); | |
| 1831 } else { | |
| 1832 text_mode(); | |
| 1833 } | |
| 1834 printf("\tfldl _%d\n",lb); | |
| 1835 } | |
| 1836 | |
| 138 | 1837 void code_dneg(int freg,int d) |
| 82 | 1838 { |
| 1839 printf("\tfchs\n"); | |
| 1840 } | |
| 81 | 1841 |
| 147 | 1842 void code_d2i(int freg) |
| 82 | 1843 { |
| 1844 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*2); | |
| 1845 printf("\tfnstcw (%%esp)\n"); | |
| 1846 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1847 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1848 printf("\tfldcw (%%esp)\n"); | |
| 85 | 1849 printf("\tfistpl %d(%%esp)\n",size_of_int); |
| 127 | 1850 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 85 | 1851 printf("\tfldcw (%%esp)\n"); |
| 82 | 1852 printf("\tpopl %s\n",register_name(creg,0)); |
| 1853 printf("\tpopl %s\n",register_name(creg,0)); | |
| 1854 } | |
| 81 | 1855 |
| 147 | 1856 void code_i2d(int creg) |
| 82 | 1857 { |
| 1858 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1859 printf("\tfildl (%%esp)\n"); | |
| 1860 printf("\tlea %d(%%esp),%%esp\n",size_of_int); | |
| 1861 } | |
| 1862 | |
| 147 | 1863 void code_d2u(int freg) |
| 85 | 1864 { |
| 86 | 1865 printf("\tlea -%d(%%esp),%%esp\n",size_of_int*3); |
| 85 | 1866 printf("\tfnstcw (%%esp)\n"); |
| 1867 printf("\tmovl (%%esp), %s\n",register_name(creg,0)); | |
| 1868 printf("\tmovb $12, 1(%%esp)\n"); | |
| 1869 printf("\tfldcw (%%esp)\n"); | |
| 127 | 1870 printf("\tmovl %s, (%%esp)\n",register_name(creg,0)); |
| 86 | 1871 printf("\tfistpll %d(%%esp)\n",size_of_int); |
| 85 | 1872 printf("\tfldcw (%%esp)\n"); |
| 86 | 1873 printf("\tmovl %d(%%esp),%s\n",size_of_int,register_name(creg,0)); |
| 1874 printf("\tlea %d(%%esp),%%esp\n",size_of_int*3); | |
| 85 | 1875 } |
| 1876 | |
| 147 | 1877 void code_u2d(int creg) |
| 85 | 1878 { |
| 86 | 1879 printf("\tpushl %s\n",register_name(creg,0)); |
| 1880 printf("\tpushl %s\n",register_name(creg,0)); | |
| 1881 printf("\tmovl $0, %d(%%esp)\n",size_of_int); | |
| 1882 printf("\tfildll (%%esp)\n"); | |
| 1883 printf("\tlea %d(%%esp),%%esp\n",size_of_int*2); | |
| 85 | 1884 } |
| 1885 | |
| 133 | 1886 void code_d2f(int freg) { } |
| 1887 void code_f2d(int freg) { } | |
| 147 | 1888 void code_f2i(int freg) { code_d2i(freg); } |
| 1889 void code_f2u(int freg) { code_d2u(freg); } | |
| 1890 void code_i2f(int creg) { code_i2d(creg); } | |
| 1891 void code_u2f(int creg) { code_u2d(creg); } | |
| 133 | 1892 |
| 107 | 1893 void code_drgvar(int e2,int d,int freg) |
| 82 | 1894 { |
| 109 | 1895 printf("\t%s %s\n",fload(d),((NMTBL*)cadr(e2))->nm); |
| 82 | 1896 } |
| 81 | 1897 |
| 1898 | |
| 107 | 1899 void code_drlvar(int e2,int d,int freg) |
| 82 | 1900 { |
| 119 | 1901 printf("\t%s %d(%%ebp)\n",fload(d),lvar(e2)); |
| 82 | 1902 } |
| 1903 | |
| 138 | 1904 void code_cmp_drgvar(int e2,int d) |
| 82 | 1905 { |
| 109 | 1906 printf("\tfcomp %s\n",((NMTBL*)cadr(e2))->nm); |
| 82 | 1907 } |
| 1908 | |
| 138 | 1909 void code_cmp_drlvar(int e2,int d) |
| 82 | 1910 { |
| 119 | 1911 printf("\tfcomp %d(%%ebp)\n",lvar(e2)); |
| 82 | 1912 } |
| 1913 | |
| 1914 void dtosop(int op,int e1) | |
| 94 | 1915 { |
| 82 | 1916 switch(op) { |
| 133 | 1917 case FADD: |
| 82 | 1918 case DADD: printf("\tfaddp %%st,%%st(1)\n"); break; |
| 133 | 1919 case FSUB: |
| 85 | 1920 case DSUB: printf("\tfsubp %%st,%%st(1)\n"); break; |
| 133 | 1921 case FDIV: |
| 85 | 1922 case DDIV: printf("\tfdivp %%st,%%st(1)\n"); break; |
| 133 | 1923 case FMUL: |
| 82 | 1924 case DMUL: printf("\tfmulp %%st,%%st(1)\n"); break; |
| 133 | 1925 case FCMP: |
| 89 | 1926 case DCMP: |
| 82 | 1927 printf("\tfucompp\n"); |
| 1928 printf("\tfnstsw\t%%ax\n"); | |
| 1929 break; | |
| 1930 } | |
| 1931 } | |
| 81 | 1932 |
| 83 | 1933 void |
| 1934 code_dassop(int op,int d) { | |
| 1935 /* we have lvalue in creg, applied floating value is in %st(0) */ | |
| 102 | 1936 emit_dpop(d); /* do nothing for 387 */ |
| 83 | 1937 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 1938 dtosop(op,0); | |
| 1939 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1940 } | |
| 1941 | |
| 1942 void | |
| 107 | 1943 code_dpreinc(int e1,int e2,int d,int freg) { |
| 83 | 1944 g_expr(e2); |
| 1945 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1946 printf("\tfld1\n"); | |
| 87 | 1947 if (caddr(e1)>0) |
| 83 | 1948 printf("\tfaddp %%st,%%st(1)\n"); |
| 1949 else | |
| 1950 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 1951 printf("\t%s (%s)\n",fstore(d),register_name(creg,0)); | |
| 1952 } | |
| 1953 | |
| 1954 void | |
| 107 | 1955 code_dpostinc(int e1,int e2,int d,int freg) { |
| 83 | 1956 g_expr(e2); |
| 1957 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); | |
| 1958 if (use) | |
| 86 | 1959 printf("\t%s (%s)\n",fload(d),register_name(creg,0)); |
| 83 | 1960 printf("\tfld1\n"); |
| 87 | 1961 if (caddr(e1)>0) |
| 83 | 1962 printf("\tfaddp %%st,%%st(1)\n"); |
| 1963 else | |
| 1964 printf("\tfsubrp %%st,%%st(1)\n"); | |
| 87 | 1965 printf("\t%s (%s)\n",(use?fstore_u(d):fstore(d)),register_name(creg,0)); |
| 83 | 1966 } |
| 1967 | |
| 84 | 1968 void |
| 1969 drexpr(int e1, int e2,int l1, int op) | |
| 1970 { | |
| 89 | 1971 g_expr(list3(DCMP,e1,e2)); |
| 84 | 1972 switch(op) { |
| 1973 case DOP+GE: | |
| 133 | 1974 case FOP+GE: |
| 84 | 1975 printf("\ttestb\t$5,%%ah\n"); |
| 1976 printf("\tjne\t_%d\n",l1); | |
| 1977 break; | |
| 1978 case DOP+GT: | |
| 133 | 1979 case FOP+GT: |
| 84 | 1980 printf("\ttestb\t$69,%%ah\n"); |
| 1981 printf("\tjne\t_%d\n",l1); | |
| 1982 break; | |
| 1983 case DOP+EQ: | |
| 133 | 1984 case FOP+EQ: |
| 84 | 1985 printf("\tandb\t$69,%%ah\n"); |
| 1986 printf("\txorb\t$64,%%ah\n"); | |
| 1987 printf("\tjne\t_%d\n",l1); | |
| 1988 break; | |
| 1989 case DOP+NEQ: | |
| 133 | 1990 case FOP+NEQ: |
| 84 | 1991 printf("\tandb\t$69,%%ah\n"); |
| 1992 printf("\txorb\t$64,%%ah\n"); | |
| 1993 printf("\tje\t_%d\n",l1); | |
| 1994 break; | |
| 1995 } | |
| 1996 } | |
| 1997 | |
| 94 | 1998 void |
| 138 | 1999 code_dregister(int e2,int freg,int d) |
| 94 | 2000 { |
| 2001 error(-1); | |
| 2002 } | |
| 2003 | |
| 138 | 2004 void |
| 2005 code_cmp_dregister(int e2,int d) | |
| 94 | 2006 { |
| 2007 error(-1); | |
| 82 | 2008 } |
| 81 | 2009 |
| 97 | 2010 int pop_fregister() |
| 82 | 2011 { |
| 94 | 2012 if (freg_sp<0) { error(-1); return -1;} |
| 2013 printf("# fpop: %d\n",freg_sp-1); | |
| 2014 return freg_stack[--freg_sp]; | |
| 82 | 2015 } |
| 81 | 2016 |
| 94 | 2017 int |
| 138 | 2018 emit_dpop(int d) |
| 94 | 2019 { |
| 2020 int xreg; | |
| 97 | 2021 if ((xreg=pop_fregister())==-1) { |
| 94 | 2022 } else if (xreg<= -REG_LVAR_OFFSET) { |
| 119 | 2023 code_drlvar(REG_LVAR_OFFSET+xreg,1,freg); |
| 117 | 2024 free_lvar(xreg+REG_LVAR_OFFSET); |
| 94 | 2025 /* pushed order is reversed. We don't need this for comutable |
| 2026 operator, but it is ok to do this. */ | |
| 2027 printf("\tfxch\t%%st(1)\n"); | |
| 2028 } | |
| 2029 return xreg; | |
| 2030 } | |
| 2031 | |
| 2032 | |
| 138 | 2033 void emit_dpop_free(int e1,int d) |
| 82 | 2034 { |
| 2035 } | |
| 81 | 2036 |
| 133 | 2037 void emit_dpush(int type) |
| 82 | 2038 { |
| 119 | 2039 if (freg_sp>=MAX_FPU_STACK) code_save_fstacks(); |
| 94 | 2040 if (freg_sp>MAX_MAX) error(-1); |
| 107 | 2041 freg_stack[freg_sp++]=-1; |
| 94 | 2042 printf("# fpush:%d\n",freg_sp); |
| 2043 } | |
| 2044 | |
| 195 | 2045 #endif |
| 2046 | |
| 94 | 2047 void |
| 2048 code_save_stacks() | |
| 2049 { | |
| 2050 /* temporal registers or stacks in fpu are saved in local variable */ | |
| 2051 int xreg,sp,screg; | |
| 2052 sp=reg_sp; | |
| 2053 while(sp-->0) { | |
| 2054 if ((xreg=reg_stack[sp])>=0) { | |
| 2055 screg=creg; | |
| 2056 if(creg!=xreg) { | |
| 2057 if (xreg!=dreg) free_register(xreg); | |
| 2058 creg = xreg; | |
| 2059 } | |
| 2060 code_assign_lvar( | |
| 119 | 2061 (reg_stack[sp]=new_lvar(size_of_int)),creg,0); |
| 94 | 2062 reg_stack[sp]= reg_stack[sp]-REG_LVAR_OFFSET; |
| 2063 regv[xreg]=0; | |
| 2064 creg=screg; | |
| 2065 } | |
| 2066 } | |
| 195 | 2067 #if FLOAT_CODE |
| 107 | 2068 code_save_fstacks(); |
| 195 | 2069 #endif |
| 107 | 2070 } |
| 2071 | |
| 195 | 2072 #if FLOAT_CODE |
| 107 | 2073 void |
| 2074 code_save_fstacks() | |
| 2075 { | |
| 127 | 2076 int xreg,sp,uses; |
| 2077 uses = use; use = 0; | |
| 94 | 2078 sp=freg_sp; |
| 2079 while(sp-->0) { | |
| 2080 if ((xreg=freg_stack[sp])==-1) { | |
| 2081 code_dassign_lvar( | |
| 119 | 2082 (freg_stack[sp]=new_lvar(size_of_double)),freg,1); |
| 94 | 2083 freg_stack[sp]= freg_stack[sp]-REG_LVAR_OFFSET; |
| 2084 } | |
| 2085 } | |
| 127 | 2086 use = uses; |
| 82 | 2087 } |
| 195 | 2088 #endif |
| 2089 | |
| 2090 | |
| 2091 | |
| 2092 #if LONGLONG_CODE | |
| 2093 | |
| 2094 | |
| 2095 /* 64bit int part */ | |
| 2096 | |
| 2097 void lrexpr(int e1, int e2,int l1, int op) | |
| 2098 { | |
| 2099 } | |
| 2100 | |
| 2101 int lpop_register() | |
| 2102 { | |
| 2103 return 0; | |
| 2104 } | |
| 2105 | |
| 2106 int emit_lpop() | |
| 2107 { | |
| 2108 return 0; | |
| 2109 } | |
| 2110 | |
| 2111 void code_lregister(int e2,int reg) | |
| 2112 { | |
| 2113 | |
| 2114 } | |
| 2115 | |
| 2116 void code_cmp_lregister(int reg) | |
| 2117 { | |
| 2118 | |
| 2119 } | |
| 2120 | |
| 2121 void code_cmp_lrgvar(int e1,int e2) | |
| 2122 { | |
| 2123 | |
| 2124 } | |
| 2125 | |
| 2126 void code_cmp_lrlvar(int e1,int e2) | |
| 2127 { | |
| 2128 | |
| 2129 } | |
| 2130 | |
| 2131 void code_lassign(int e1,int e2) | |
| 2132 { | |
| 2133 | |
| 2134 } | |
| 2135 | |
| 2136 void code_lassign_gvar(int e1,int e2) | |
| 2137 { | |
| 2138 | |
| 2139 } | |
| 2140 | |
| 2141 void code_lassign_lvar(int e1,int e2) | |
| 2142 { | |
| 2143 | |
| 2144 } | |
| 2145 | |
| 2146 void code_lassign_lregister(int e2,int reg) | |
| 2147 { | |
| 2148 | |
| 2149 } | |
| 2150 | |
| 2151 void code_lconst(int e1,int e2) | |
| 2152 { | |
| 2153 | |
| 2154 } | |
| 2155 | |
| 2156 void code_lneg(int e1,int e2) | |
| 2157 { | |
| 2158 | |
| 2159 } | |
| 2160 | |
| 2161 void code_lrgvar(int e1,int e2) | |
| 2162 { | |
| 2163 | |
| 2164 } | |
| 2165 | |
| 2166 void code_lrlvar(int e1,int e2) | |
| 2167 { | |
| 2168 | |
| 2169 } | |
| 2170 | |
| 2171 void ltosop(int e1,int e2) | |
| 2172 { | |
| 2173 | |
| 2174 } | |
| 2175 | |
| 2176 void emit_lpop_free(int e1) | |
| 2177 { | |
| 2178 | |
| 2179 } | |
| 2180 | |
| 2181 void emit_lpush() | |
| 2182 { | |
| 2183 | |
| 2184 } | |
| 2185 | |
| 2186 void code_i2ll(int creg) | |
| 2187 { | |
| 2188 | |
| 2189 } | |
| 2190 | |
| 2191 void code_i2ull(int creg) | |
| 2192 { | |
| 2193 | |
| 2194 } | |
| 2195 | |
| 2196 void code_u2ll(int creg) | |
| 2197 { | |
| 2198 | |
| 2199 } | |
| 2200 | |
| 2201 void code_u2ull(int creg) | |
| 2202 { | |
| 2203 | |
| 2204 } | |
| 2205 | |
| 2206 void code_ll2i(int creg) | |
| 2207 { | |
| 2208 | |
| 2209 } | |
| 2210 | |
| 2211 void code_ll2u(int creg) | |
| 2212 { | |
| 2213 | |
| 2214 } | |
| 2215 | |
| 2216 void code_ull2i(int creg) | |
| 2217 { | |
| 2218 | |
| 2219 } | |
| 2220 | |
| 2221 void code_ull2u(int creg) | |
| 2222 { | |
| 2223 | |
| 2224 } | |
| 2225 | |
| 2226 #if FLOAT_CODE | |
| 2227 void code_d2ll(int creg) | |
| 2228 { | |
| 2229 | |
| 2230 } | |
| 2231 | |
| 2232 void code_d2ull(int creg) | |
| 2233 { | |
| 2234 | |
| 2235 } | |
| 2236 | |
| 2237 void code_f2ll(int creg) | |
| 2238 { | |
| 2239 | |
| 2240 } | |
| 2241 | |
| 2242 void code_f2ull(int creg) | |
| 2243 { | |
| 2244 | |
| 2245 } | |
| 2246 | |
| 2247 void code_ll2d(int creg) | |
| 2248 { | |
| 2249 | |
| 2250 } | |
| 2251 | |
| 2252 void code_ll2f(int creg) | |
| 2253 { | |
| 2254 | |
| 2255 } | |
| 2256 | |
| 2257 void code_ull2d(int creg) | |
| 2258 { | |
| 2259 | |
| 2260 } | |
| 2261 | |
| 2262 void code_ull2f(int creg) | |
| 2263 { | |
| 2264 | |
| 2265 } | |
| 2266 | |
| 2267 void code_ull2ll(int creg) | |
| 2268 { | |
| 2269 | |
| 2270 } | |
| 2271 | |
| 2272 void code_ull2ull(int creg) | |
| 2273 { | |
| 2274 | |
| 2275 } | |
| 2276 | |
| 2277 #endif | |
| 2278 | |
| 2279 | |
| 2280 void code_lpreinc(int e1,int e2,int reg) | |
| 2281 { | |
| 2282 | |
| 2283 } | |
| 2284 | |
| 2285 void code_lpostinc(int e1,int e2,int reg) | |
| 2286 { | |
| 2287 | |
| 2288 } | |
| 2289 | |
| 2290 void code_lassop(int op) | |
| 2291 { | |
| 2292 | |
| 2293 } | |
| 2294 | |
| 2295 | |
| 2296 #endif | |
| 81 | 2297 |
| 61 | 2298 /* end */ |
| 195 | 2299 |