Mercurial > hg > CbC > old > device
annotate mc-nop-386.c @ 46:b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
calling sequence.
| author | kono |
|---|---|
| date | Sat, 15 Feb 2003 17:54:30 +0900 |
| parents | b9266c88495c |
| children | f6b5e4f1a962 |
| rev | line source |
|---|---|
| 0 | 1 /* Micro-C Code Generatation Part for intel386 */ |
| 1 | 2 /* $Id$ */ |
| 0 | 3 |
| 4 #define EXTERN extern | |
| 5 #include "mc.h" | |
| 6 | |
| 18 | 7 extern int get_register_var(void); |
| 8 extern void bexpr(int e1, char cond, int l1); | |
| 9 extern void closing(void); | |
| 10 extern void cmpdimm(int e, int csreg); | |
| 11 extern void code_enter(char *name) ; | |
| 12 extern void code_enter1(int disp0,int args); | |
| 13 extern void code_init(void); | |
| 36 | 14 extern void code_leave(char *name,int disp) ; |
| 15 extern void leave(int control,char *name,int disp0) ; | |
| 18 | 16 extern void def_label(int cslabel, int dlabel) ; |
| 17 extern void emit_data(int e, int t, NMTBL *n); | |
| 18 extern void emit_init(void); | |
| 19 extern void enter(char *name) ; | |
| 20 extern void enter1(int disp) ; | |
| 21 extern void g_expr(int e1); | |
| 22 extern void gen_comment(char *s); | |
| 23 extern void gen_gdecl(char *n, int gpc) ; | |
| 24 extern void gen_source(char *s); | |
| 25 extern void gexpr(int e1); | |
| 26 extern void jcond(int l, char cond); | |
| 27 extern void jmp(int l); | |
| 28 extern void opening(char *filename); | |
| 29 extern void ret(void); | |
| 0 | 30 |
| 42 | 31 static int edx_setup() ; |
| 18 | 32 static int lvar(int l); |
| 33 static void jump(int e1, int env); | |
| 34 static void data_mode(char *name); | |
| 35 static void text_mode(void); | |
| 36 static void assign(int e1); | |
| 37 static void assop(int e1); | |
| 38 static void b_expr(int e1, char cond, int l1); | |
| 39 static void emit_push(void); | |
| 40 static void free_register(int i); | |
| 41 static void function(int e1); | |
| 42 static void global_table(void) ; | |
| 43 /* static void indexy(char *op, char *gvar); */ | |
| 44 /* static void jmp_eq_label(int l); */ | |
| 45 /* static void jmp_label(int l); */ | |
| 46 static void ld_indexx(int byte, int n, int xreg); | |
| 47 static void local_table(void) ; | |
| 48 static void machinop(int e1); | |
| 49 static void rexpr(int e1, int l1, char *s); | |
| 50 static void rindirect(int e1); | |
| 51 static void sassign(int e1); | |
| 52 static void shift(char *op, int xreg) ; | |
| 53 /* static void st_indexx(int byte, int n, int xreg); */ | |
| 54 static void string(int e1); | |
| 43 | 55 static void tosop(int op,int reg); |
| 42 | 56 static void edx_cleanup(); |
| 26 | 57 static void use_register(int virt, int real, int move); |
| 38 | 58 static void emit_copy(int from,int to,int length,int offset); |
| 18 | 59 |
| 60 extern int error(int n); | |
| 61 extern int fwdlabel(void); | |
| 62 extern void fwddef(int l); | |
| 63 extern int backdef(void); | |
| 64 extern int size(int t); | |
| 65 extern int list3(int e1, int e2, int e3); | |
| 2 | 66 extern int scalar(int); |
| 67 extern int reverse0(int); | |
| 0 | 68 |
| 69 #define TEXT_EMIT_MODE 0 | |
| 70 #define DATA_EMIT_MODE 1 | |
| 71 #define RODATA_EMIT_MODE 2 | |
| 72 | |
| 18 | 73 static int output_mode = TEXT_EMIT_MODE; |
| 74 static int data_alignment = 0; | |
| 0 | 75 |
| 36 | 76 static int code_disp_label; |
| 77 static int func_disp_label; | |
| 78 | |
| 0 | 79 /* |
| 80 local1 <----24 local variable | |
| 81 %esi -20 <- disp_offset | |
| 82 %edi -16 | |
| 83 %edx -12 | |
| 84 %ecx -8 | |
| 85 %ebx -4 | |
| 86 %ebp = %esp 0 | |
| 87 %eip 4 <- arg_offset | |
| 88 arg1 8 | |
| 89 see enter/enter1/leave | |
| 90 */ | |
| 91 int arg_offset = 8; | |
| 6 | 92 int code_arg_offset = -4; |
| 3 | 93 int disp_offset = -12; |
| 94 int func_disp_offset = -12; | |
| 95 int code_disp_offset = -4; | |
| 96 int size_of_int = 4; | |
| 0 | 97 int endian = 0; |
| 98 int MAX_REGISTER=6; /* intel386のレジスタを4つまで使う*/ | |
| 99 int REAL_MAX_REGISTER=8; /* intel386のレジスタが8つということ*/ | |
| 100 int MAX_DATA_REG=4; | |
| 101 int MAX_POINTER=3; | |
| 102 int MAX_REGISTGER_VAR=2; | |
| 103 | |
| 104 static int creg; /* current register */ | |
| 105 static int dreg; /* temporary register */ | |
| 106 static int reg_sp; /* REGister Stack-Pointer */ | |
| 107 | |
| 108 | |
| 109 #define REG_EAX 0 | |
| 110 #define REG_EBX 1 | |
| 111 #define REG_ECX 2 | |
| 112 #define REG_EDX 3 | |
| 113 #define REG_ESI 4 | |
| 114 #define REG_EDI 5 | |
| 115 #define REG_EBP 6 | |
| 116 #define REG_ESP 7 | |
| 117 | |
| 118 | |
| 119 #define DATA_REG 0 | |
| 120 #define POINTER_REG 3 | |
| 121 static char *reg_name[8]; | |
| 122 static char *reg_name_l[4]; | |
| 13 | 123 static char *reg_name_w[4]; |
| 0 | 124 |
| 125 /* | |
| 126 creg currrent virtual register | |
| 127 dreg spare virtual register | |
| 128 | |
| 129 rname[creg] currrent real register | |
| 130 rname[dreg] spare real register | |
| 131 | |
| 132 regs[] virtual register usage | |
| 40 | 133 regv[] value in virtual register flag |
| 0 | 134 |
| 135 reg_name[rname[creg]] | |
| 136 */ | |
| 137 | |
| 138 #define MAX_MAX 10 | |
| 139 static int rname[MAX_MAX]; | |
| 140 static int regs[MAX_MAX]; /* 使われているレジスタを示すフラグ */ | |
| 141 static int reg_stack[MAX_MAX]; /* 実際のレジスタの領域 */ | |
| 40 | 142 static int regv[MAX_MAX]; /* 値が入っているかどうか */ |
| 0 | 143 |
| 144 void | |
| 145 code_init(void) | |
| 146 { | |
| 24 | 147 arg_offset = 8; |
| 148 func_disp_offset = -12; | |
| 149 disp_offset = -12; | |
| 150 size_of_int = 4; | |
| 151 endian = 0; | |
| 152 MAX_REGISTER=6; | |
| 153 MAX_DATA_REG=4; | |
| 154 MAX_POINTER=3; | |
| 0 | 155 MAX_REGISTER_VAR=2; |
| 156 | |
| 157 reg_name[REG_EAX] = "%eax"; | |
| 158 reg_name[REG_EBX] = "%ebx"; | |
| 159 reg_name[REG_ECX] = "%ecx"; | |
| 160 reg_name[REG_EDX] = "%edx"; | |
| 161 reg_name[REG_ESI] = "%esi"; | |
| 162 reg_name[REG_EDI] = "%edi"; | |
| 163 reg_name[REG_EBP] = "%ebp"; | |
| 164 reg_name[REG_ESP] = "%esp"; | |
| 165 reg_name_l[REG_EAX] = "%al"; | |
| 166 reg_name_l[REG_EBX] = "%bl"; | |
| 167 reg_name_l[REG_ECX] = "%cl"; | |
| 168 reg_name_l[REG_EDX] = "%dl"; | |
| 13 | 169 reg_name_w[REG_EAX] = "%ax"; |
| 170 reg_name_w[REG_EBX] = "%bx"; | |
| 171 reg_name_w[REG_ECX] = "%cx"; | |
| 172 reg_name_w[REG_EDX] = "%dx"; | |
| 0 | 173 |
| 174 } | |
| 175 | |
| 176 char * | |
| 18 | 177 register_name(int i,int byte) |
| 0 | 178 { |
| 38 | 179 if (i<0) { |
| 180 error(REG_ERR); | |
| 181 return "%eax"; | |
| 182 } | |
| 24 | 183 if (byte && rname[i] <= REG_EDX) { |
| 18 | 184 return reg_name_l[rname[i]]; |
| 185 } else { | |
| 24 | 186 return reg_name[rname[i]]; /* should be error */ |
| 18 | 187 } |
| 0 | 188 } |
| 189 | |
| 190 int | |
| 191 get_register(void) | |
| 192 { /* 使われていないレジスタを調べる */ | |
| 193 int i; | |
| 194 for(i=0;i<MAX_REGISTER;i++) { | |
| 195 if (! regs[i]) { /* 使われていないなら */ | |
| 196 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 197 return i; /* その場所を表す番号を返す */ | |
| 198 } | |
| 199 } | |
| 200 return -1; /* 空いている場所がないなら、それを表す -1 を返す */ | |
| 201 } | |
| 202 | |
| 203 void | |
| 204 free_register(int i) { /* いらなくなったレジスタを開放 */ | |
| 40 | 205 regv[i]=regs[i]=0; |
| 0 | 206 } |
| 207 | |
| 208 int | |
| 209 register_full(void) | |
| 210 { | |
| 211 int i; | |
| 212 for(i=0;i<MAX_REGISTER;i++) { | |
| 213 if (! regs[i]) { | |
| 214 return 0; | |
| 215 } | |
| 216 } | |
| 217 return 1; | |
| 218 } | |
| 219 | |
| 23 | 220 static |
| 221 int | |
| 222 free_register_count(void) | |
| 223 { | |
| 224 int i,count; | |
| 225 count = 0; | |
| 226 for(i=0;i<MAX_REGISTER;i++) { | |
| 42 | 227 if (! regs[i] && ! regv[i]) count++; |
| 23 | 228 } |
| 229 return count; | |
| 230 } | |
| 231 | |
| 42 | 232 static void |
| 233 free_all_register(void) | |
| 234 { | |
| 235 int i; | |
| 236 for(i=0;i<MAX_REGISTER;i++) { | |
| 237 regs[i]=regv[i]=0; | |
| 238 } | |
| 239 creg = get_register(); | |
| 240 dreg = get_register(); | |
| 241 return; | |
| 242 } | |
| 243 | |
| 40 | 244 void |
| 245 use_register_var(int i) { | |
| 246 regv[i]=1; | |
| 247 } | |
| 248 | |
| 249 static int creg_regvar = -1; | |
| 250 static int creg_regvar_back; | |
| 251 static int creg_back; | |
| 252 | |
| 253 void | |
| 254 creg_destroy() { | |
| 255 creg_back = creg; creg_regvar_back = creg_regvar; | |
| 256 if (creg_regvar>=0) | |
| 257 creg = creg_regvar; | |
| 258 creg_regvar=-1; | |
| 259 } | |
| 260 | |
| 261 void | |
| 262 creg_un_destroy() { | |
| 263 creg = creg_back; creg_regvar = creg_regvar_back; | |
| 264 } | |
| 265 | |
| 42 | 266 void |
| 267 register_usage(char *s) | |
| 268 { | |
| 269 int i; | |
| 270 printf("# %d: %s:",lineno,s); | |
| 271 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 272 for(i=0;i<MAX_REGISTER;i++) { | |
| 273 printf("%d",regs[i]); | |
| 274 } | |
| 275 printf(":"); | |
| 276 for(i=0;i<MAX_REGISTER;i++) { | |
| 277 printf("%d",regv[i]); | |
| 278 } | |
| 279 #if 0 | |
| 280 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 281 for(i=reg_sp;i>=0;i--) { | |
| 282 if(reg_stack[i]>=0) | |
| 283 printf(" %s",register_name(reg_stack[i],0)); | |
| 284 } | |
| 285 #endif | |
| 286 printf("\n"); | |
| 287 } | |
| 23 | 288 |
| 0 | 289 void |
| 290 gexpr_init(void) | |
| 291 { | |
| 292 while(reg_sp > 0) { | |
| 293 free_register(reg_stack[--reg_sp]); | |
| 294 } | |
| 295 text_mode(); | |
| 26 | 296 use_register(creg,REG_EAX,0); |
| 42 | 297 regv[dreg]=0; |
| 40 | 298 creg_regvar = -1; |
| 42 | 299 register_usage("gexpr_init"); |
| 0 | 300 } |
| 301 | |
| 42 | 302 |
| 0 | 303 void |
| 304 emit_init(void) | |
| 305 { | |
| 306 int i; | |
| 40 | 307 for(i=0;i<REAL_MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} |
| 42 | 308 free_all_register(); |
| 0 | 309 reg_sp = 0; |
| 310 text_mode(); | |
| 311 } | |
| 312 | |
| 313 int | |
| 314 virtual(int real) | |
| 315 { | |
| 316 int real_v,i; | |
| 317 real_v = -1; | |
| 318 for(i=0;i<MAX_REGISTER;i++) { | |
| 319 if (rname[i]==real) { | |
| 320 real_v=i; | |
| 321 break; | |
| 322 } | |
| 323 } | |
| 23 | 324 /* if (real_v == -1) |
| 325 error(-1); */ | |
| 0 | 326 return real_v; |
| 327 } | |
| 328 | |
| 329 void | |
| 330 use_register(int virt, int real, int move) | |
| 331 { | |
| 332 int real_v; | |
| 333 char *move_op; | |
| 334 if (rname[virt]==real) | |
| 335 return; | |
| 336 real_v = virtual(real); | |
| 337 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 41 | 338 if (move || (regv[real_v])) { |
| 0 | 339 printf(move_op,reg_name[rname[virt]],reg_name[real]); |
| 340 } | |
| 341 rname[real_v] = rname[virt]; | |
| 342 rname[virt] = real; | |
| 343 } | |
| 344 | |
| 345 void | |
| 346 use_pointer(int virt, int move) | |
| 347 { | |
| 348 int i; | |
| 349 if (rname[virt]>=POINTER_REG) | |
| 350 return; | |
| 351 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 352 if (!regs[virtual(i)]) { | |
| 353 use_register(virt,i,move); | |
| 354 return; | |
| 355 } | |
| 356 } | |
| 357 /* we prefer EBX */ | |
| 358 use_register(virt,REG_EBX,move); | |
| 359 } | |
| 360 | |
| 361 void | |
| 362 use_data_reg(int virt, int move) | |
| 363 { | |
| 364 int i; | |
| 365 if (rname[virt]<MAX_DATA_REG) | |
| 366 return; | |
| 367 for(i=0;i<MAX_DATA_REG;i++) { | |
| 368 if (!regs[virtual(i)]) { | |
| 369 use_register(virt,i,move); | |
| 370 return; | |
| 371 } | |
| 372 } | |
| 373 /* we prefer EBX */ | |
| 374 use_register(virt,REG_EBX,move); | |
| 375 } | |
| 376 | |
| 377 int | |
| 378 pop_register(void) | |
| 379 { /* レジスタから値を取り出す */ | |
| 42 | 380 return reg_stack[--reg_sp]; |
| 0 | 381 } |
| 382 | |
| 383 int | |
| 384 stack_used(void) { | |
| 385 return reg_stack[--reg_sp]<0; | |
| 386 } | |
| 387 | |
| 388 void | |
| 389 emit_push(void) | |
| 390 { | |
| 391 int new_reg; | |
| 392 new_reg = get_register(); | |
| 393 if(new_reg<0) { /* もうレジスタがない */ | |
| 394 reg_stack[reg_sp++] = -1; | |
| 18 | 395 printf("\tpushl %s\n",register_name(creg,0)); |
| 42 | 396 /* creg is used soon, don't regv[creg]=0 */ |
| 0 | 397 } else { |
| 398 reg_stack[reg_sp++] = creg; /* push するかわりにレジスタを使う */ | |
| 18 | 399 creg = new_reg; |
| 42 | 400 regv[creg]=1; |
| 0 | 401 } |
| 42 | 402 } |
| 403 | |
| 404 void | |
| 405 emit_push_x(int xreg) | |
| 406 { | |
| 407 int new_reg; | |
| 408 new_reg = get_register(); | |
| 409 if(new_reg<0) { /* もうレジスタがない */ | |
| 410 reg_stack[reg_sp++] = -1; | |
| 411 printf("\tpushl %s\n",register_name(xreg,0)); | |
| 412 /* creg is used soon, don't regv[xreg]=0 */ | |
| 413 } else { | |
| 414 reg_stack[reg_sp++] = xreg; /* push するかわりにレジスタを使う */ | |
| 415 xreg = new_reg; | |
| 416 regv[xreg]=1; | |
| 417 } | |
| 0 | 418 } |
| 419 | |
| 18 | 420 int |
| 0 | 421 emit_pop(int type) |
| 422 { | |
| 18 | 423 int xreg; |
| 42 | 424 if ((xreg=pop_register())==-1) { |
| 0 | 425 if (type==POINTER_REG) |
| 426 use_pointer(dreg,0); | |
| 427 else if (type==DATA_REG) | |
| 428 use_data_reg(dreg,0); | |
| 42 | 429 if (regv[dreg]) { |
| 430 printf("# emit_pop dreg conflict\n"); | |
| 431 } | |
| 18 | 432 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 433 xreg = dreg; |
| 42 | 434 regv[xreg]=1; |
| 435 } | |
| 436 return xreg; | |
| 437 } | |
| 438 | |
| 439 static void | |
| 440 emit_pop_free(int xreg) | |
| 441 { | |
| 442 if (xreg==dreg) { | |
| 443 regv[dreg]=0; | |
| 43 | 444 } else if (xreg!=-1) { |
| 42 | 445 free_register(xreg); |
| 0 | 446 } |
| 447 } | |
| 448 | |
| 449 int | |
| 450 get_register_var(void) | |
| 451 { | |
| 452 int i; | |
| 453 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 454 if (! regs[i]) { /* 使われていないなら */ | |
| 455 regs[i]=1; /* そのレジスタを使うことを宣言し */ | |
| 41 | 456 regv[i]=0; |
| 0 | 457 return i; /* その場所を表す番号を返す */ |
| 458 } | |
| 459 } | |
| 460 return -1; | |
| 461 } | |
| 462 | |
| 463 void | |
| 464 gexpr(int e1) | |
| 465 { | |
| 466 gexpr_init(); | |
| 24 | 467 #if 0 |
| 32 | 468 if(lineno==2862) { |
| 24 | 469 g_expr(e1); /*break here*/ |
| 470 return; | |
| 471 } | |
| 472 #endif | |
| 0 | 473 g_expr(e1); |
| 42 | 474 } |
| 475 | |
| 476 int | |
| 477 csvalue() | |
| 478 { | |
| 479 return rname[creg]; /* for siwtch value */ | |
| 0 | 480 } |
| 481 | |
| 482 void | |
| 483 g_expr(int e1) | |
| 484 { | |
| 22 | 485 int e2,e3/*,e4*/; |
| 0 | 486 char *xrn; |
| 487 NMTBL *n; | |
| 488 | |
| 489 if (chk) return; | |
| 490 e2 = cadr(e1); | |
| 491 switch (car(e1)){ | |
| 492 case GVAR: | |
| 493 /* use_pointer(creg,0); */ | |
| 18 | 494 printf("\tmovl $%s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 495 regv[creg]=1; |
| 0 | 496 return; |
| 497 case RGVAR: | |
| 498 /* use_pointer(creg,0); */ | |
| 18 | 499 printf("\tmovl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 500 regv[creg]=1; |
| 0 | 501 return; |
| 502 case CRGVAR: | |
| 27 | 503 printf("\tmovsbl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 504 regv[creg]=1; |
| 0 | 505 return; |
| 506 case LVAR: | |
| 507 /* use_pointer(creg,0); */ | |
| 18 | 508 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 509 regv[creg]=1; |
| 0 | 510 return; |
| 511 case REGISTER: | |
| 512 /* this is of course redundant... */ | |
| 18 | 513 /* we can use rname for this? */ |
| 514 /* or why not creg=e2? */ | |
| 515 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); | |
| 42 | 516 regv[creg]=1; |
| 0 | 517 return; |
| 518 case RLVAR: | |
| 18 | 519 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 520 regv[creg]=1; |
| 0 | 521 return; |
| 522 case CRLVAR: | |
| 21 | 523 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 524 regv[creg]=1; |
| 0 | 525 return; |
| 526 case FNAME: | |
| 18 | 527 printf("\tmovl $%s,%s\n",((NMTBL *)e2)->nm,register_name(creg,0)); |
| 42 | 528 regv[creg]=1; |
| 0 | 529 return; |
| 530 case CONST: /* 代入する値が0でも特別な処理はしない */ | |
| 18 | 531 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 42 | 532 regv[creg]=1; |
| 0 | 533 return; |
| 534 case STRING: | |
| 535 string(e1); | |
| 42 | 536 regv[creg]=1; |
| 0 | 537 return; |
| 538 case FUNCTION: | |
| 539 function(e1); | |
| 42 | 540 regv[creg]=1; |
| 0 | 541 return; |
| 542 case CODE: | |
| 543 jump(e2,caddr(e1)); | |
| 544 return; | |
| 545 case INDIRECT: | |
| 546 g_expr(e2); | |
| 547 return; | |
| 548 case RINDIRECT: case CRINDIRECT: | |
| 549 rindirect(e1); | |
| 550 return; | |
| 551 case ADDRESS: | |
| 552 g_expr(e2); | |
| 553 return; | |
| 554 case MINUS: /* レジスタに対し、neglを実行すれば実現可能 */ | |
| 555 g_expr(e2); | |
| 556 /* use_data_reg(creg,1); */ | |
| 18 | 557 printf("\tnegl %s\n", register_name(creg,0)); |
| 0 | 558 return; |
| 559 case BNOT: /* ~ */ | |
| 560 g_expr(e2); | |
| 561 /* use_data_reg(creg,1); */ | |
| 18 | 562 printf("\tnotl %s\n", register_name(creg,0)); |
| 0 | 563 return; |
| 564 case LNOT: /* ! */ | |
| 565 g_expr(e2); | |
| 566 use_data_reg(creg,1); | |
| 18 | 567 xrn = register_name(creg,1); |
| 568 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 569 printf("\tsete %s\n", xrn); | |
| 570 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 0 | 571 return; |
| 572 case PREINC: | |
| 573 if (car(e2)==REGISTER) { | |
| 18 | 574 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 575 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 576 return; |
| 577 } | |
| 578 g_expr(e2); | |
| 18 | 579 xrn = register_name(creg,0); |
| 580 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 581 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 0 | 582 return; |
| 583 case POSTINC: | |
| 584 if (car(e2)==REGISTER) { | |
| 18 | 585 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 586 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 0 | 587 return; |
| 588 } | |
| 589 g_expr(e2); | |
| 590 emit_push(); | |
| 41 | 591 xrn = register_name((e2=emit_pop(0)),0); |
| 18 | 592 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 593 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); |
| 42 | 594 emit_pop_free(e2); |
| 0 | 595 return; |
| 596 case CPOSTINC: | |
| 597 /* char *p; *p++ */ | |
| 598 if (car(e2)==REGISTER) { | |
| 18 | 599 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 600 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 0 | 601 return; |
| 602 } | |
| 603 g_expr(e2); | |
| 42 | 604 emit_push(); |
| 41 | 605 xrn = register_name((e2=emit_pop(0)),1); |
| 18 | 606 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 607 printf("\tincl (%s)\n",xrn); |
| 42 | 608 emit_pop_free(e2); |
| 0 | 609 return; |
| 610 case CPREINC: | |
| 611 if (car(e2)==REGISTER) { | |
| 18 | 612 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 613 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 614 return; |
| 615 } | |
| 616 g_expr(e2); | |
| 18 | 617 printf("\tincl (%s)\n",register_name(creg,0)); |
| 21 | 618 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 0 | 619 return; |
| 620 case CPOSTDEC: | |
| 621 if (car(e2)==REGISTER) { | |
| 18 | 622 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 623 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 0 | 624 return; |
| 625 } | |
| 626 g_expr(e2); | |
| 21 | 627 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 18 | 628 printf("\tdecl (%s)\n",register_name(creg,0)); |
| 0 | 629 return; |
| 630 case CPREDEC: | |
| 631 if (car(e2)==REGISTER) { | |
| 18 | 632 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 633 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 634 return; |
| 635 } | |
| 636 g_expr(e2); | |
| 637 emit_push(); | |
| 18 | 638 e2 = emit_pop(0); |
| 639 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 21 | 640 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); |
| 42 | 641 emit_pop_free(e2); |
| 0 | 642 return; |
| 643 case MUL: case UMUL: | |
| 644 case DIV: case UDIV: | |
| 645 case MOD: case UMOD: | |
| 646 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT: | |
| 647 case ADD: case SUB: case BAND: case EOR: case BOR: | |
| 648 machinop(e1); | |
| 649 return; | |
| 650 case COND: | |
| 651 e2=fwdlabel(); | |
| 652 b_expr(cadr(e1),0,e2); | |
| 22 | 653 use_register(creg,REG_EAX,0); |
| 0 | 654 g_expr(caddr(e1)); |
| 22 | 655 /* e4 = rname[creg]; this is a bad idea */ |
| 656 use_register(creg,REG_EAX,1); | |
| 0 | 657 jmp(e3=fwdlabel()); |
| 658 fwddef(e2); | |
| 22 | 659 use_register(creg,REG_EAX,0); |
| 0 | 660 g_expr(cadddr(e1)); |
| 22 | 661 /* use_register(creg,e4,1); */ |
| 662 use_register(creg,REG_EAX,1); | |
| 0 | 663 fwddef(e3); |
| 664 return; | |
| 37 | 665 case RSTRUCT: |
| 666 g_expr(e2); | |
| 667 return; | |
| 0 | 668 case SASS: |
| 669 sassign(e1); | |
| 670 return; | |
| 671 case ASS: case CASS: | |
| 672 assign(e1); | |
| 673 return; | |
| 674 case ASSOP: case CASSOP: | |
| 675 assop(e1); | |
| 676 return; | |
| 677 case COMMA: | |
| 678 g_expr(e2); | |
| 679 g_expr(caddr(e1)); | |
| 680 return; | |
| 681 case RETURN: | |
| 682 n = (NMTBL *)e2; | |
| 683 if (retcont==0) | |
| 684 retcont=fwdlabel(); | |
| 18 | 685 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 42 | 686 regv[creg]=1; |
| 0 | 687 return; |
| 688 case ENVIRONMENT: | |
| 18 | 689 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 42 | 690 regv[creg]=1; |
| 0 | 691 return; |
| 692 default: | |
| 693 b_expr(e1,1,e2=fwdlabel()); /* including > < ... */ | |
| 18 | 694 xrn = register_name(creg,0); |
| 695 printf("\txorl %s,%s\n",xrn,xrn); | |
| 0 | 696 jmp(e3=fwdlabel()); |
| 697 fwddef(e2); | |
| 18 | 698 printf("\tmovl $1,%s\n",xrn); |
| 0 | 699 fwddef(e3); |
| 42 | 700 regv[creg]=1; |
| 0 | 701 } |
| 702 } | |
| 703 | |
| 704 void | |
| 705 bexpr(int e1, char cond, int l1) | |
| 706 { | |
| 707 gexpr_init(); | |
| 708 b_expr(e1,cond,l1); | |
| 709 } | |
| 710 | |
| 711 void | |
| 712 b_expr(int e1, char cond, int l1) | |
| 713 { | |
| 714 int e2,l2; | |
| 715 if (chk) return; | |
| 716 e2=cadr(e1); | |
| 717 switch(car(e1)) { | |
| 718 case LNOT: | |
| 719 b_expr(e2,!cond,l1); | |
| 720 return; | |
| 721 case GT: | |
| 722 rexpr(e1,l1,cond?"g":"le"); | |
| 723 return; | |
| 724 case UGT: | |
| 725 rexpr(e1,l1,cond?"a":"be"); | |
| 726 return; | |
| 727 case GE: | |
| 728 rexpr(e1,l1,cond?"ge":"l"); | |
| 729 return; | |
| 730 case UGE: | |
| 731 rexpr(e1,l1,cond?"ae":"b"); | |
| 732 return; | |
| 733 case LT: | |
| 734 rexpr(e1,l1,cond?"l":"ge"); | |
| 735 return; | |
| 736 case ULT: | |
| 737 rexpr(e1,l1,cond?"b":"ae"); | |
| 738 return; | |
| 739 case LE: | |
| 740 rexpr(e1,l1,cond?"le":"g"); | |
| 741 return; | |
| 742 case ULE: | |
| 743 rexpr(e1,l1,cond?"be":"a"); | |
| 744 return; | |
| 745 case EQ: | |
| 746 rexpr(e1,l1,cond?"e":"ne"); | |
| 747 return; | |
| 748 case NEQ: | |
| 749 rexpr(e1,l1,cond?"ne":"e"); | |
| 750 return; | |
| 751 case LAND: | |
| 752 b_expr(e2,0,cond?(l2=fwdlabel()):l1); | |
| 753 b_expr(caddr(e1),cond,l1); | |
| 754 if(cond) fwddef(l2); | |
| 755 return; | |
| 756 case LOR: | |
| 757 b_expr(e2,1,cond?l1:(l2=fwdlabel())); | |
| 758 b_expr(caddr(e1),cond,l1); | |
| 759 if(!cond) fwddef(l2); | |
| 760 return; | |
| 761 case CRGVAR: | |
| 18 | 762 printf("\tcmpb $0,%s\n",(char *)caddr(e1)); |
| 0 | 763 jcond(l1,cond); |
| 764 return; | |
| 765 case CRLVAR: | |
| 766 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e2)); | |
| 767 jcond(l1,cond); | |
| 768 return; | |
| 769 case RGVAR: | |
| 18 | 770 printf("\tcmpl $0,%s\n",(char *)caddr(e1)); |
| 0 | 771 jcond(l1,cond); |
| 772 return; | |
| 773 case RLVAR: | |
| 774 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e2)); | |
| 775 jcond(l1,cond); | |
| 776 return; | |
| 777 case REGISTER: | |
| 18 | 778 printf("\tcmpl $0,%s\n",register_name(e2,0)); |
| 0 | 779 jcond(l1,cond); |
| 780 return; | |
| 781 case CONST: | |
| 782 if((cond&&e2)||(!cond&&!e2)) jmp(l1); | |
| 783 return; | |
| 784 default: | |
| 785 g_expr(e1); | |
| 18 | 786 printf("\tcmpl $0,%s\n",register_name(creg,0)); |
| 0 | 787 jcond(l1,cond); |
| 788 return; | |
| 789 } | |
| 790 } | |
| 791 | |
| 792 void | |
| 793 ascii(char *s) | |
| 794 { | |
| 795 printf("\t.string \""); | |
| 796 while(*s) { | |
| 797 if (*s=='\n') | |
| 798 printf("%cn",92); | |
| 799 else if (*s<' ') | |
| 800 printf("%c%03o",92,*s); | |
| 801 else if (*s==34) | |
| 802 printf("%c%c",92,34); | |
| 803 else | |
| 804 printf("%c",*s); | |
| 805 s++; | |
| 806 } | |
| 807 printf("%c\n",34); | |
| 808 } | |
| 809 | |
| 810 void | |
| 811 string(int e1) | |
| 812 { | |
| 813 char *s; | |
| 814 int i,lb; | |
| 815 | |
| 816 if (0) { | |
| 817 s=(char *)cadr(e1); | |
| 818 lb=fwdlabel(); | |
| 819 printf("\tjmp _%d\n",lb); | |
| 820 i=backdef(); | |
| 821 ascii(s); | |
| 822 printf("\t.align 2\n"); | |
| 823 fwddef(lb); | |
| 18 | 824 printf("\tlea _%d,%s\n",i,register_name(creg,0)); |
| 0 | 825 } else { |
| 826 s=(char *)cadr(e1); | |
| 827 printf(".section\t.rodata\n"); | |
| 828 lb=fwdlabel(); | |
| 829 printf("_%d:\n",lb); | |
| 830 ascii(s); | |
| 831 if (output_mode==TEXT_EMIT_MODE) { | |
| 832 printf(".text\n"); | |
| 833 } else { | |
| 834 text_mode(); | |
| 835 } | |
| 18 | 836 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); |
| 0 | 837 } |
| 838 } | |
| 839 | |
| 13 | 840 #define MAX_COPY_LEN 20 |
| 841 | |
| 842 void | |
| 38 | 843 emit_copy(int from,int to,int length,int offset) |
| 13 | 844 { |
| 39 | 845 int fix = 0; |
| 846 if (length<=0) return; | |
| 13 | 847 switch (length) { |
| 848 case 0: break; | |
| 849 case 1: | |
| 38 | 850 printf("\tmovb %d(%s),%s\n",offset,register_name(from,0), reg_name_l[rname[dreg]] ); |
| 851 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 852 break; |
| 853 case 2: | |
| 38 | 854 printf("\tmovw %d(%s),%s\n",offset,register_name(from,0), reg_name_w[rname[dreg]] ); |
| 855 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 856 break; |
| 857 case 4: | |
| 38 | 858 printf("\tmovl %d(%s),%s\n",offset,register_name(from,0), register_name(dreg,0)); |
| 859 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset,register_name(to,0)); | |
| 13 | 860 break; |
| 861 default: | |
| 862 if (length <=MAX_COPY_LEN) { | |
| 14 | 863 for(;length>=4;length-=4,offset+=4) |
| 13 | 864 emit_copy(from,to,4,offset); |
| 14 | 865 for(;length>=2;length-=2,offset+=2) |
| 13 | 866 emit_copy(from,to,2,offset); |
| 867 if(length>0) | |
| 868 emit_copy(from,to,length,offset); | |
| 39 | 869 break; |
| 13 | 870 } |
| 39 | 871 use_register(from,REG_ESI,1); |
| 872 use_register(to, REG_EDI,1); | |
| 873 use_register(dreg,REG_ECX,0); | |
| 14 | 874 printf("\tmovl $%d,%%ecx\n",length/4); |
| 39 | 875 fix = (length/4)*4; |
| 13 | 876 printf("\tcld\n\trep\n\tmovsl\n"); |
| 14 | 877 if(length%4) { |
| 38 | 878 emit_copy(from,to,length,offset+length/4); |
| 14 | 879 } |
| 13 | 880 } |
| 39 | 881 /* this code is necessary for the value of assignment or function call */ |
| 882 /* otherwise we don't need this */ | |
| 883 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); | |
| 884 if(creg!=to) { | |
| 45 | 885 if (to==dreg) |
| 886 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 887 else { | |
| 888 free_register(creg); creg=to; | |
| 889 } | |
| 39 | 890 } |
| 41 | 891 regv[from]=regv[to]=regv[dreg]=0; |
| 42 | 892 regv[creg]=1; |
| 13 | 893 } |
| 894 | |
| 895 int | |
| 896 struct_push(int e4,int t) | |
| 897 { | |
| 42 | 898 int length,xreg,save,lreg; |
| 13 | 899 g_expr(e4); |
| 14 | 900 length=size(t); |
| 901 if(length%size_of_int) { | |
| 902 length += size_of_int - (length%size_of_int); | |
| 13 | 903 } |
| 40 | 904 if (length==4) { |
| 905 printf("\tpushl (%s)\n",register_name(creg,0)); return 1; | |
| 906 } | |
| 907 if (length==8) { | |
| 908 printf("\tpushl 4(%s)\n",register_name(creg,0)); | |
| 909 printf("\tpushl (%s)\n",register_name(creg,0)); return 2; | |
| 910 } | |
| 38 | 911 /* I think, after g_expr, at least two registers are free */ |
| 14 | 912 printf("\tsubl $%d,%%esp\n",length); |
| 38 | 913 if (register_full()) { |
| 914 /* this is wrong assumption */ | |
| 915 save = 1; | |
|
46
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45
diff
changeset
|
916 for(lreg=0;lreg==creg||lreg==dreg;lreg++); |
| 38 | 917 printf("\tpushl %s\n",register_name(lreg,0)); |
|
46
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45
diff
changeset
|
918 xreg = lreg; regv[xreg]=0; |
| 38 | 919 } else { |
| 920 save=0; | |
| 921 xreg = get_register(); | |
| 13 | 922 } |
|
46
b1c8ac8c308d
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kono
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diff
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|
923 if (save) |
|
b1c8ac8c308d
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kono
parents:
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diff
changeset
|
924 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); |
|
b1c8ac8c308d
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kono
parents:
45
diff
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|
925 else |
|
b1c8ac8c308d
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kono
parents:
45
diff
changeset
|
926 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); |
| 41 | 927 regv[xreg]=1; |
| 38 | 928 emit_copy(creg,xreg,length,0); |
|
46
b1c8ac8c308d
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kono
parents:
45
diff
changeset
|
929 /* we have value in creg, it may be changed */ |
| 38 | 930 if (save) { |
|
46
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kono
parents:
45
diff
changeset
|
931 if(creg==xreg) { |
|
b1c8ac8c308d
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kono
parents:
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diff
changeset
|
932 creg = get_register(); /* creg is freed in emit_copy */ |
|
b1c8ac8c308d
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kono
parents:
45
diff
changeset
|
933 printf("\tmovl %s,%s\n",register_name(xreg,0),register_name(creg,0)); |
|
b1c8ac8c308d
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kono
parents:
45
diff
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|
934 regv[creg]=1; |
|
b1c8ac8c308d
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kono
parents:
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diff
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|
935 } |
|
b1c8ac8c308d
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kono
parents:
45
diff
changeset
|
936 printf("\tpopl %s\n",register_name(xreg,0)); |
|
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parents:
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diff
changeset
|
937 regv[xreg]=1; |
| 38 | 938 } else |
| 939 free_register(xreg); | |
| 14 | 940 return length/size_of_int; |
| 13 | 941 } |
| 942 | |
| 0 | 943 void |
| 944 function(int e1) | |
| 945 { | |
| 13 | 946 int e2,e3,e4,e5,nargs,t; |
| 0 | 947 NMTBL *n; |
| 23 | 948 int save,saved; |
| 949 if (free_register_count()<1) { | |
| 950 for(save = 0;save==dreg||save==creg;save++); | |
| 951 printf("\tpushl %s\n",register_name(save,0)); | |
| 952 saved = 1; | |
| 953 } else { | |
| 954 save = get_register(); | |
| 955 saved = 0; | |
| 956 } | |
| 41 | 957 regv[save]=0; |
| 0 | 958 e2 = cadr(e1); |
| 959 nargs = 0; | |
| 960 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 13 | 961 t=caddr(e3); |
| 0 | 962 n=(NMTBL *)(e5=(cadr(e4 = car(e3)))); |
| 963 switch(car(e4)) { | |
| 964 case FNAME: | |
| 18 | 965 printf("\tlea %s,%s\n",n->nm,register_name(creg,0)); |
| 966 printf("\tpushl %s\n",register_name(creg,0)); | |
| 0 | 967 break; |
| 968 case ADDRESS: | |
| 969 g_expr(e5); | |
| 18 | 970 printf("\tpushl %s\n",register_name(creg,0)); |
| 0 | 971 break; |
| 13 | 972 default: |
| 973 if(scalar(t)) { | |
| 974 g_expr(e4); | |
| 18 | 975 printf("\tpushl %s\n",register_name(creg,0)); |
| 13 | 976 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 977 nargs += struct_push(e4,t); | |
| 978 continue; | |
| 979 } else { | |
| 980 error(TYERR); | |
| 981 } | |
| 0 | 982 } |
| 983 ++nargs; | |
| 984 } | |
| 985 if (car(e2) == FNAME) { | |
| 986 n=(NMTBL *)cadr(e2); | |
| 23 | 987 } else { |
| 44 | 988 use_register(creg,REG_EAX,0); |
| 23 | 989 g_expr(e2); |
| 990 } | |
| 991 | |
| 26 | 992 /* we don't have to save creg nor dreg */ |
| 41 | 993 regs[creg]=0; regs[dreg]=0; |
| 994 regv[creg]= regv[dreg]= regv[save]= 0; | |
| 23 | 995 use_register(creg,REG_EAX,0); |
| 996 use_register(dreg,REG_EDX,0); /* will be destroyed */ | |
| 997 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 41 | 998 regs[creg]=1; regs[dreg]=1; |
| 23 | 999 |
| 1000 if (car(e2) == FNAME) { | |
| 0 | 1001 printf("\tcall\t%s\n",n->nm); |
| 23 | 1002 } else { |
| 18 | 1003 printf("\tcall\t*%s\n",register_name(creg,0)); |
| 0 | 1004 } |
| 6 | 1005 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); |
| 23 | 1006 if (saved) { |
| 1007 printf("\tpopl %s\n",register_name(save,0)); | |
| 1008 } else { | |
| 1009 free_register(save); | |
| 1010 } | |
| 41 | 1011 regv[save]=0; |
| 1012 regv[creg]=1; | |
| 0 | 1013 } |
| 1014 | |
| 2 | 1015 int |
| 3 | 1016 arg_size(int e3,int *nargs0) |
| 2 | 1017 { |
| 1018 int i,nargs,offset_list,e,t; | |
| 1019 | |
| 1020 offset_list = 0; | |
| 1021 /* we should use prototypes's type */ | |
| 1022 for (i = nargs = 0; e3;e3 =cadr(e3)) { | |
| 1023 e = car(e3); t = caddr(e3); | |
| 3 | 1024 if (i < MAX_REGISTER_VAR && scalar(t)) { |
| 5 | 1025 offset_list = list3(-(REG_ESI+i++),offset_list,e); |
| 2 | 1026 } else { |
| 1027 offset_list = | |
| 5 | 1028 list3(nargs,offset_list,e); |
| 3 | 1029 nargs += (car(e3)==CHAR?size_of_int:size(t)); |
| 2 | 1030 } |
| 1031 } | |
| 3 | 1032 *nargs0 = -nargs; |
| 2 | 1033 return offset_list; |
| 1034 } | |
| 1035 | |
| 18 | 1036 int |
| 1037 is_simple(int e1) | |
| 1038 { | |
| 1039 int e2 = car(e1); | |
| 1040 return ( | |
| 1041 e2==FNAME || e2==LVAR || e2==CRLVAR || e2==REGISTER | |
| 1042 ); | |
| 1043 } | |
| 1044 | |
| 1045 void | |
| 1046 jump_new(int e1, int env) | |
| 1047 { | |
| 1048 int e2; | |
| 1049 NMTBL *code0; | |
| 1050 /* | |
| 1051 jump アドレスを計算する | |
| 1052 */ | |
| 1053 /* compute jump address */ | |
| 1054 e2 = cadr(e1); | |
| 1055 if (car(e2) == FNAME) { | |
| 1056 code0=(NMTBL *)cadr(e2); | |
| 1057 if (code0->sc!=CODE) { | |
| 1058 error(STERR); return; | |
| 1059 } | |
| 1060 } else { /* indirect */ | |
| 1061 g_expr(e2); | |
| 1062 emit_push(); | |
| 1063 } | |
| 1064 /* | |
| 1065 まず、複雑な式を前もって単純な式に落す。 | |
| 1066 必要なら局所変数を用いる。 | |
| 1067 局所変数へのオフセットを覚えておく | |
| 1068 */ | |
| 1069 /* | |
| 1070 スタックの位置を修正する | |
| 1071 */ | |
| 1072 /* | |
| 1073 オフセットを用いて、 | |
| 1074 並べ変えを行う | |
| 1075 */ | |
| 1076 /* | |
| 1077 スタックの位置を修正する | |
| 1078 */ | |
| 1079 /* | |
| 1080 jump code を生成する | |
| 1081 */ | |
| 1082 } | |
| 1083 | |
| 0 | 1084 void |
| 1085 jump(int e1, int env) | |
| 1086 { | |
| 18 | 1087 int i,args,e2,e3,e4,e5,nargs,regs; |
| 0 | 1088 NMTBL *n,*code0; |
| 42 | 1089 int new_disp,scode,disp1,xreg; |
| 0 | 1090 char *xrn; |
| 1091 | |
| 2 | 1092 /* We need three passes. Compute Stack size, Compute Arg, Copy it. */ |
| 0 | 1093 /* count number of args */ |
| 2 | 1094 args = caddr(e1); |
| 3 | 1095 args = reverse0(args); |
| 1096 nargs = arg_size(args,&new_disp); /* compute in normal order */ | |
| 5 | 1097 disp1 = (fnptr->sc==CODE)?0:-size_of_int; |
| 1098 if (new_disp+disp1 < disp) { /* have to extend stack */ | |
| 6 | 1099 if (fnptr->sc==CODE) |
| 1100 printf("\tleal %d(%%ebp),%%esp\n",new_disp-size_of_int); | |
| 1101 else | |
| 1102 printf("\tleal %d(%%ebp),%%esp\n",new_disp+disp_offset); | |
| 0 | 1103 } |
| 1104 /* compute jump address */ | |
| 1105 e2 = cadr(e1); | |
| 1106 if (car(e2) == FNAME) { | |
| 1107 code0=(NMTBL *)cadr(e2); | |
| 1108 if (code0->sc!=CODE) { | |
| 1109 error(STERR); return; | |
| 1110 } | |
| 1111 } else { /* indirect */ | |
| 1112 g_expr(e2); | |
| 1113 emit_push(); | |
| 1114 } | |
| 2 | 1115 /* compute arguments in reverse order */ |
| 21 | 1116 /* printf("## jump code_arg_offset=%d code_disp_offset=%d\n",code_arg_offset,code_disp_offset); */ |
| 2 | 1117 regs = 0; |
| 4 | 1118 i=MAX_REGISTER_VAR; |
| 2 | 1119 for (e3=nargs; e3;e3 =cadr(e3)) { |
| 1120 n=(NMTBL *)(e5=(cadr(e4 = caddr(e3)))); | |
| 0 | 1121 switch(car(e4)) { |
| 1122 case FNAME: | |
| 18 | 1123 printf("\tlea %s,%s\n",n->nm,register_name(creg,0)); |
| 0 | 1124 emit_push(); |
| 1125 break; | |
| 1126 case ADDRESS: | |
| 1127 g_expr(e5); | |
| 1128 emit_push(); | |
| 1129 break; | |
| 1130 case RLVAR: | |
| 1131 case CRLVAR: | |
| 4 | 1132 if (env==0 && fnptr->sc==CODE) { |
| 21 | 1133 /* printf("## e5=%d car(e3)=%d\n",e5,car(e3)); */ |
| 5 | 1134 if (e5>=0 && e5==car(e3)) { |
| 2 | 1135 /* The same positioned local variable. No need to copy */ |
| 1136 reg_stack[reg_sp++] = -2; | |
| 1137 } | |
| 4 | 1138 break; |
| 0 | 1139 } |
| 3 | 1140 g_expr(e4); |
| 1141 emit_push(); | |
| 1142 break; | |
| 0 | 1143 case REGISTER: |
| 21 | 1144 /* printf("## i=%d rname[e5]=%d\n",i,rname[e5]); */ |
| 4 | 1145 if (i>0 && rname[e5]==REG_ESI+ --i) { |
| 3 | 1146 /* The same register variable. No need to copy */ |
| 2 | 1147 reg_stack[reg_sp++] = e5; |
| 4 | 1148 break; |
| 0 | 1149 } |
| 1150 default: | |
| 1151 g_expr(e4); | |
| 1152 emit_push(); | |
| 1153 } | |
| 2 | 1154 regs++; |
| 0 | 1155 } |
| 1156 if (env) { | |
| 2 | 1157 /* change the frame pointer */ |
| 0 | 1158 g_expr(env); |
| 18 | 1159 printf("\tmovl %s,%%ebp\n",register_name(creg,0)); |
| 3 | 1160 } else if (fnptr->sc==FUNCTION) { |
| 1161 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); | |
| 1162 } | |
| 1163 /* force lvar offset mode to CODE */ | |
| 1164 scode = fnptr->sc; fnptr->sc = CODE; | |
| 21 | 1165 /* printf("## jump2 code_arg_offset=%d code_disp_offset=%d\n",code_arg_offset,code_disp_offset); */ |
| 0 | 1166 /* copy arguments to destination environment if necessary */ |
| 3 | 1167 nargs = reverse0(nargs); /* pop in normal order */ |
| 1168 i=0; | |
| 1169 for (e3=nargs; e3;e3 =cadr(e3)) { | |
| 5 | 1170 if ((e4=car(e3))<0) { |
| 2 | 1171 /* register case */ |
| 1172 if (reg_stack[--reg_sp]>=REG_ESI) { | |
| 1173 /* the same registger */ | |
| 1174 } else { | |
| 1175 if(reg_stack[reg_sp]<0) { | |
| 5 | 1176 printf("\tpopl %s\n",reg_name[rname[REG_ESI+i]]); /* e4? */ |
| 2 | 1177 } else { |
| 1178 printf("\tmovl %s,%s\n", | |
| 1179 reg_name[rname[reg_stack[reg_sp]]], | |
| 5 | 1180 reg_name[rname[REG_ESI+i]]); /* e4? */ |
| 2 | 1181 free_register(reg_stack[reg_sp]); |
| 1182 } | |
| 3 | 1183 i++; |
| 2 | 1184 } |
| 1185 } else { | |
| 1186 /* local variable case */ | |
| 0 | 1187 if (reg_stack[reg_sp-1]== -2) { |
| 1188 /* same positioned variable */ | |
| 1189 reg_sp--; | |
| 1190 } else { | |
| 42 | 1191 printf("\tmovl %s,%d(%%ebp)\n",register_name((xreg=emit_pop(0)),0), lvar(e4)); |
| 0 | 1192 } |
| 1193 } | |
| 1194 } | |
| 42 | 1195 free_register(xreg); |
| 0 | 1196 if (car(e2) != FNAME) { |
| 42 | 1197 xrn=register_name((xreg=emit_pop(0)),0); |
| 0 | 1198 } |
| 42 | 1199 free_register(xreg); |
| 6 | 1200 if (!env && new_disp+disp1>disp) { |
| 0 | 1201 /* shrink stack if necessary */ |
| 5 | 1202 printf("\tleal %d(%%ebp),%%esp\n",new_disp-size_of_int); |
| 0 | 1203 } |
| 1204 if (car(e2) == FNAME) { | |
| 1205 printf("\tjmp %s\n",code0->nm); | |
| 1206 } else { | |
| 1207 printf("\tjmp *%s\n",xrn); | |
| 1208 } | |
| 3 | 1209 fnptr->sc = scode; |
| 0 | 1210 } |
| 1211 | |
| 1212 | |
| 1213 void | |
| 1214 machinop(int e1) | |
| 1215 { | |
| 1216 int e2,e3,op; | |
| 1217 | |
| 1218 e2 = cadr(e1); | |
| 1219 op = car(e1); | |
| 1220 e3 = caddr(e1); | |
| 1221 g_expr(e3); | |
| 1222 emit_push(); | |
| 1223 g_expr(e2); | |
| 43 | 1224 tosop(car(e1),(e2=pop_register())); |
| 1225 emit_pop_free(e2); | |
| 42 | 1226 regv[creg]=1; |
| 0 | 1227 return; |
| 1228 } | |
| 1229 | |
| 1230 | |
| 1231 void | |
| 1232 rindirect(int e1) /* *(p +5 ) */ | |
| 1233 | |
| 1234 { | |
| 1235 char *op; | |
| 1236 int e2,e3,byte; | |
| 1237 | |
| 1238 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); | |
| 1239 e3 = cadr(e2 = cadr(e1)); | |
| 1240 g_expr(e2); | |
| 21 | 1241 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 0 | 1242 } |
| 1243 | |
| 1244 void | |
| 1245 sassign(int e1) | |
| 1246 { | |
| 38 | 1247 int e2,e3,e4,sz,xreg; |
| 0 | 1248 |
| 18 | 1249 /* structure assignment */ |
| 37 | 1250 e2 = cadr(e1); /* pointer variable to the struct */ |
| 1251 e3 = cadr(e2); /* offset of the variable (distination) */ | |
| 39 | 1252 e4 = caddr(e1); /* right value (source) */ |
| 37 | 1253 sz = cadddr(e1); /* size of struct or union */ |
| 0 | 1254 g_expr(e4); |
| 1255 emit_push(); | |
| 1256 g_expr(e2); | |
| 38 | 1257 xreg = emit_pop(0); |
| 1258 emit_copy(xreg,creg,sz,0); | |
| 42 | 1259 emit_pop_free(xreg); |
| 0 | 1260 return; |
| 1261 } | |
| 1262 | |
| 1263 void | |
| 1264 assign(int e1) | |
| 1265 { | |
| 1266 char *op; | |
| 1267 int e2,e3,e4,byte; | |
| 1268 | |
| 1269 op = ((byte=(car(e1) == CASS))? "movb" : "movl"); | |
| 1270 /* e2=e4 */ | |
| 1271 e2 = cadr(e1); | |
| 1272 e3 = cadr(e2); | |
| 1273 e4 = caddr(e1); | |
| 1274 switch(car(e2)) { | |
| 1275 case GVAR: /* i=3 */ | |
| 1276 g_expr(e4); | |
| 1277 if (byte) use_data_reg(creg,1); | |
| 18 | 1278 printf("\t%s %s,%s\n",op,register_name(creg,byte),(char *)caddr(e2)); |
| 0 | 1279 return; |
| 1280 case LVAR: | |
| 1281 g_expr(e4); | |
| 1282 if (byte) use_data_reg(creg,1); | |
| 18 | 1283 printf("\t%s %s,%d(%%ebp)\n",op,register_name(creg,byte),lvar(cadr(e2))); |
| 0 | 1284 return; |
| 1285 case REGISTER: | |
| 1286 g_expr(e4); | |
| 1287 if (creg!=cadr(e2)) | |
| 23 | 1288 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(cadr(e2),0)); |
| 0 | 1289 return; |
| 1290 } | |
| 23 | 1291 g_expr(e2); |
| 0 | 1292 emit_push(); |
| 23 | 1293 use_data_reg(creg,0); |
| 1294 g_expr(e4); | |
| 0 | 1295 if (byte) use_data_reg(creg,1); |
| 23 | 1296 e2 = emit_pop(0); |
| 1297 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(e2,0)); | |
| 42 | 1298 emit_pop_free(e2); |
| 1299 regv[creg]=1; | |
| 0 | 1300 return; |
| 1301 } | |
| 1302 | |
| 1303 void | |
| 1304 assop(int e1) | |
| 1305 { | |
| 43 | 1306 int e2,e3,byte,op,reg; |
| 0 | 1307 char *xrn; |
| 42 | 1308 int xreg,edx; |
| 0 | 1309 |
| 1310 /* e2 op= e3 */ | |
| 1311 byte = (car(e1) == CASSOP); | |
| 1312 e2 = cadr(e1); | |
| 1313 if (car(e2)==INDIRECT) e2=cadr(e2); | |
| 1314 e3 = caddr(e1); | |
| 1315 op = cadddr(e1); | |
| 1316 | |
| 1317 g_expr(e3); | |
| 1318 if (car(e2)==REGISTER) { | |
| 43 | 1319 xreg = creg; |
| 1320 creg = reg = cadr(e2); | |
| 1321 tosop(op,xreg); | |
| 1322 creg = xreg; | |
| 1323 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 42 | 1324 regv[creg]=1; |
| 0 | 1325 return; |
| 1326 } | |
| 43 | 1327 emit_push(); |
| 0 | 1328 g_expr(e2); |
| 42 | 1329 edx = edx_setup(); |
| 18 | 1330 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ |
| 42 | 1331 regv[xreg]=regs[xreg]=1; |
| 1332 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1333 regv[edx]=1; | |
| 1334 ld_indexx(byte,0,edx); | |
| 43 | 1335 tosop(op,xreg); |
| 42 | 1336 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); |
| 1337 edx_cleanup(); | |
| 1338 emit_pop_free(xreg); | |
| 1339 regv[creg]=1; | |
| 0 | 1340 return; |
| 1341 } | |
| 1342 | |
| 1343 | |
| 1344 void | |
| 43 | 1345 tosop(int op,int oreg) |
| 0 | 1346 { |
| 43 | 1347 int dx; |
| 18 | 1348 char *orn,*crn; |
| 0 | 1349 |
| 1350 switch(op) { | |
| 1351 case LSHIFT: | |
| 1352 case ULSHIFT: | |
| 1353 shift("sall",oreg); | |
| 1354 return; | |
| 1355 case RSHIFT: | |
| 1356 shift("sarl",oreg); | |
| 1357 return; | |
| 1358 case URSHIFT: | |
| 1359 shift("shrl",oreg); | |
| 1360 return; | |
| 1361 } | |
| 1362 if(oreg==-1) { | |
| 18 | 1363 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 1364 oreg = dreg; |
| 42 | 1365 regv[dreg]=1; |
| 0 | 1366 } |
| 42 | 1367 regv[oreg]=1; regs[oreg]=1; |
| 18 | 1368 orn = register_name(oreg,0); |
| 1369 crn = register_name(creg,0); | |
| 0 | 1370 switch(op) { |
| 1371 case ADD: | |
| 1372 printf("\taddl %s,%s\n",orn,crn); | |
| 41 | 1373 break; |
| 0 | 1374 case SUB: |
| 1375 printf("\tsubl %s,%s\n",orn,crn); | |
| 41 | 1376 break; |
| 0 | 1377 case BAND: |
| 1378 printf("\tandl %s,%s\n",orn,crn); | |
| 41 | 1379 break; |
| 0 | 1380 case EOR: |
| 1381 printf("\txorl %s,%s\n",orn,crn); | |
| 41 | 1382 break; |
| 0 | 1383 case BOR: |
| 1384 printf("\torl %s,%s\n",orn,crn); | |
| 41 | 1385 break; |
| 0 | 1386 case MUL: |
| 1387 case UMUL: | |
| 1388 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 41 | 1389 break; |
| 0 | 1390 case DIV: |
| 1391 case UDIV: | |
| 42 | 1392 use_register(creg,REG_EAX,1); |
| 1393 edx_setup(); | |
| 1394 orn = register_name(oreg,0); | |
| 0 | 1395 if (op==DIV) |
| 1396 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1397 else | |
| 1398 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1399 edx_cleanup(); |
| 41 | 1400 break; |
| 0 | 1401 case MOD: |
| 1402 case UMOD: | |
| 42 | 1403 use_register(creg,REG_EAX,1); |
| 1404 edx_setup(); | |
| 1405 orn = register_name(oreg,0); | |
| 0 | 1406 if (op==DIV) |
| 1407 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1408 else | |
| 1409 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1410 dx = virtual(REG_EDX); |
| 1411 if (dx!=creg) { | |
| 1412 rname[dx]=rname[creg]; | |
| 1413 rname[creg]=REG_EDX; | |
| 1414 } | |
| 1415 edx_cleanup(); | |
| 41 | 1416 break; |
| 0 | 1417 } |
| 42 | 1418 if (oreg!=dreg&&oreg>=0) |
| 1419 free_register(oreg); | |
| 0 | 1420 } |
| 1421 | |
| 42 | 1422 static int edx_stack=0; |
| 0 | 1423 |
| 42 | 1424 int |
| 1425 edx_setup() | |
| 0 | 1426 { |
| 42 | 1427 int edx_save; |
| 1428 /* make real EDX register empty */ | |
| 1429 if (free_register_count()<1) { | |
| 1430 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); | |
| 1431 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1432 edx_stack = list3(edx_save,edx_stack,0); | |
| 1433 } else { | |
| 1434 edx_save = get_register(); | |
| 1435 edx_stack = list3(edx_save,edx_stack,1); | |
| 0 | 1436 } |
| 42 | 1437 regv[edx_save]=0; |
| 1438 use_register(edx_save,REG_EDX,0); | |
| 1439 return edx_save; | |
| 0 | 1440 } |
| 1441 | |
| 18 | 1442 |
| 1443 void | |
| 42 | 1444 edx_cleanup() |
| 0 | 1445 { |
| 42 | 1446 if (caddr(edx_stack)==0) { |
| 1447 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1448 } else | |
| 1449 free_register(car(edx_stack)); | |
| 1450 edx_stack = cadr(edx_stack); | |
| 0 | 1451 } |
| 1452 | |
| 1453 void | |
| 1454 shift(char *op, int reg) | |
| 1455 { | |
| 1456 if (reg>=0) { | |
| 42 | 1457 use_register(reg,REG_ECX,1); |
| 0 | 1458 } else { |
| 1459 use_register(dreg,REG_ECX,0); | |
| 1460 printf("\tpopl %%ecx\n"); | |
| 1461 } | |
| 18 | 1462 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); |
| 0 | 1463 } |
| 1464 | |
| 1465 void | |
| 18 | 1466 ld_indexx(int byte, int n, int xreg) |
| 0 | 1467 { |
| 1468 char *op; | |
| 1469 | |
| 1470 op = byte ? "movsbl" : "movl"; | |
| 1471 if (n) | |
| 18 | 1472 printf("\t%s %d(%s),%s\n",op,n,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1473 else |
| 18 | 1474 printf("\t%s (%s),%s\n",op,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1475 } |
| 1476 | |
| 18 | 1477 /* |
| 0 | 1478 void |
| 18 | 1479 st_indexx(int byte, int n, int xreg) |
| 0 | 1480 { |
| 1481 char *op; | |
| 1482 | |
| 1483 op = byte ? "movb" : "movl"; | |
| 1484 if (n) | |
| 18 | 1485 printf("\t%s %s,%d(%s)\n",op,register_name(creg,byte),n,register_name(xreg,0)); |
| 0 | 1486 else |
| 18 | 1487 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(xreg,0)); |
| 0 | 1488 } |
| 1489 | |
| 1490 void | |
| 1491 indexy(char *op, char *gvar) | |
| 1492 { | |
| 18 | 1493 printf("\t%s %s,%s\n",op,register_name(creg,0),gvar); |
| 0 | 1494 } |
| 18 | 1495 */ |
| 0 | 1496 |
| 1497 void | |
| 1498 cmpdimm(int e, int csreg) | |
| 1499 { | |
| 1500 /* used in dosiwtch() */ | |
| 1501 use_register(creg,csreg,0); | |
| 18 | 1502 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 0 | 1503 } |
| 1504 | |
| 1505 void | |
| 1506 opening(char *filename) | |
| 1507 { | |
| 1508 printf("\t.file \"%s\"\n",filename); | |
| 1509 printf("\t.version\t\"01.01\"\n"); | |
| 1510 printf("gcc2_compiled.:\n"); | |
| 1511 printf(".text\n"); | |
| 1512 emit_init(); | |
| 1513 } | |
| 1514 | |
| 1515 void | |
| 1516 closing(void) | |
| 1517 { | |
| 1518 global_table(); | |
| 1519 printf("\t.ident \"Micro-C compiled\"\n"); | |
| 1520 } | |
| 1521 | |
| 1522 void | |
| 1523 rexpr(int e1, int l1, char *s) | |
| 1524 { | |
| 1525 g_expr(list3(SUB,cadr(e1),caddr(e1))); | |
| 1526 printf("\tj%s\t_%d\n",s,l1); | |
| 1527 } | |
| 1528 | |
| 1529 void | |
| 1530 jcond(int l, char cond) | |
| 1531 { | |
| 1532 printf("\tj%s\t_%d\n",cond?"ne":"e",l); | |
| 1533 } | |
| 1534 | |
| 1535 void | |
| 1536 jmp(int l) | |
| 1537 { | |
| 1538 control=0; | |
| 1539 printf("\tjmp\t_%d\n",l); | |
| 1540 /* align? */ | |
| 42 | 1541 /* |
| 1542 this is not allowed because of ? operator | |
| 1543 regv[creg]=regv[dreg]=0; | |
| 1544 use_register(creg,REG_EAX,0); | |
| 1545 use_register(dreg,REG_EBX,0); | |
| 1546 */ | |
| 0 | 1547 } |
| 1548 | |
| 1549 int | |
| 1550 fwdlabel(void) | |
| 1551 { | |
| 1552 return labelno++; | |
| 1553 } | |
| 1554 | |
| 1555 void | |
| 1556 fwddef(int l) | |
| 1557 { | |
| 1558 control=1; | |
| 1559 printf("_%d:\n",l); | |
| 1560 } | |
| 1561 | |
| 1562 int | |
| 1563 backdef(void) | |
| 1564 { | |
| 1565 control=1; | |
| 1566 printf("_%d:\n",labelno); | |
| 1567 return labelno++; | |
| 1568 } | |
| 1569 | |
| 1570 void | |
| 1571 def_label(int cslabel, int dlabel) | |
| 1572 { | |
| 1573 int fl; | |
| 1574 | |
| 1575 fl = 0; | |
| 1576 if (control) { | |
| 1577 jmp(fl=fwdlabel()); | |
| 1578 } | |
| 1579 fwddef(cslabel); | |
| 1580 if (dlabel) | |
| 1581 jmp(dlabel); | |
| 1582 if (fl) { | |
| 1583 fwddef(fl); | |
| 1584 } | |
| 1585 } | |
| 1586 | |
| 1587 void | |
| 1588 gen_comment(char *s) | |
| 1589 { | |
| 21 | 1590 printf("## %s",s); |
| 0 | 1591 } |
| 1592 | |
| 1593 void | |
| 1594 gen_source(char *s) | |
| 1595 { | |
| 1596 printf("%s",s); | |
| 1597 } | |
| 1598 | |
| 1599 void | |
| 1600 code_enter(char *name) | |
| 1601 { | |
| 1602 printf("\t.align 4\n"); | |
| 1603 if (stmode!=STATIC) | |
| 1604 printf(".globl %s\n",name); | |
| 1605 printf("\t.type\t%s,@function\n",name); | |
| 1606 printf("%s:\n",name); | |
| 42 | 1607 free_all_register(); |
| 0 | 1608 } |
| 1609 | |
| 1610 void | |
| 6 | 1611 code_enter1(int disp0,int args) |
| 0 | 1612 { |
| 36 | 1613 code_disp_label=fwdlabel(); |
| 1614 printf("\tsubl $_%d,%%esp\n",code_disp_label); | |
| 1615 /* | |
| 6 | 1616 if(disp0) { |
| 1617 printf("\tsubl $%d,%%esp\n",-disp0); | |
| 0 | 1618 } |
| 36 | 1619 */ |
| 21 | 1620 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); |
| 0 | 1621 } |
| 1622 | |
| 1623 void | |
| 36 | 1624 code_leave(char *name,int disp0) |
| 0 | 1625 { |
| 36 | 1626 printf("\t.set _%d,%d\n",code_disp_label,-disp0); |
| 0 | 1627 printf("_%d:\n",labelno); |
| 1628 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1629 local_table(); |
| 0 | 1630 labelno++; |
| 1631 } | |
| 1632 | |
| 1633 void | |
| 1634 enter(char *name) | |
| 1635 { | |
| 1636 printf("\t.align 2\n"); | |
| 1637 if (stmode!=STATIC) | |
| 1638 printf(".globl %s\n",name); | |
| 1639 printf("%s:\n",name); | |
| 1640 printf("\t.type\t%s,@function\n",name); | |
| 1641 printf("\tpushl %%ebp\n"); | |
| 1642 printf("\tmovl %%esp,%%ebp\n"); | |
| 1643 printf("\tpushl %%ebx\n"); | |
| 24 | 1644 printf("\tpushl %%esi\n"); |
| 1645 printf("\tpushl %%edi\n"); | |
| 42 | 1646 free_all_register(); |
| 0 | 1647 } |
| 1648 | |
| 1649 void | |
| 1650 enter1(int disp) | |
| 1651 { | |
| 36 | 1652 func_disp_label=fwdlabel(); |
| 1653 printf("\tsubl $_%d,%%esp\n",func_disp_label); | |
| 1654 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ | |
| 0 | 1655 } |
| 1656 | |
| 1657 void | |
| 36 | 1658 leave(int control, char *name,int disp) |
| 0 | 1659 { |
| 1660 if (control) | |
| 1661 use_register(creg,REG_EAX,1); | |
| 1662 if (retcont) { | |
| 1663 if (control) | |
| 1664 jmp(retlabel); | |
| 1665 fwddef(retcont); | |
| 1666 use_register(creg,REG_EAX,0); | |
| 18 | 1667 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); |
| 0 | 1668 /* printf("\tleave\n"); */ |
| 1669 } | |
| 1670 fwddef(retlabel); | |
| 42 | 1671 /* use_register(creg,REG_EAX,0); too late */ |
| 0 | 1672 /* if(disp) printf("\taddl $%d,%%esp\n",-disp); */ |
| 1673 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); | |
| 24 | 1674 printf("\tpopl %%edi\n"); |
| 1675 printf("\tpopl %%esi\n"); | |
| 0 | 1676 printf("\tpopl %%ebx\n"); |
| 1677 printf("\tleave\n"); | |
| 1678 printf("\tret\n"); | |
| 36 | 1679 printf("\t.set _%d,%d\n",func_disp_label,-disp); |
| 0 | 1680 printf("_%d:\n",labelno); |
| 1681 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1682 local_table(); |
| 0 | 1683 labelno++; |
| 1684 } | |
| 1685 | |
| 1686 | |
| 1687 void | |
| 1688 ret(void) | |
| 1689 { | |
| 1690 use_register(creg,REG_EAX,1); | |
| 1691 jmp(retlabel); | |
| 1692 } | |
| 1693 | |
| 1694 void | |
| 1695 gen_gdecl(char *n, int gpc) | |
| 1696 { | |
| 1697 /* | |
| 1698 if (stmode!=STATIC) | |
| 1699 printf(".globl %s\n",n); | |
| 1700 */ | |
| 1701 } | |
| 1702 | |
| 1703 void | |
| 1704 align(int t) | |
| 1705 { | |
| 1706 if (t!=CHAR) { | |
| 1707 if (data_alignment & 1) | |
| 1708 printf("\t.align 2\n"); | |
| 1709 data_alignment = 0; | |
| 1710 } | |
| 1711 } | |
| 1712 | |
| 1713 void | |
| 1714 emit_data(int e, int t, NMTBL *n) | |
| 1715 { | |
| 1716 int l; | |
| 1717 char *name; | |
| 1718 name = n->nm; | |
| 13 | 1719 if(mode!=GDECL) { |
| 1720 error(-1); return; | |
| 1721 } | |
| 1722 if (n->dsp != -1) { | |
| 1723 n->dsp = -1; /* initiallized flag */ | |
| 1724 printf(".globl\t%s\n",name); | |
| 1725 data_mode(name); | |
| 1726 align(t); | |
| 1727 printf("%s:\n",name); | |
| 1728 } else { | |
| 1729 data_mode(0); | |
| 1730 } | |
| 1731 if(car(e)==CONST) { | |
| 1732 if (t==CHAR) { | |
| 1733 printf("\t.byte %d\n",cadr(e)); | |
| 1734 if (data_alignment>0) | |
| 1735 data_alignment++; | |
| 1736 gpc += 1; | |
| 0 | 1737 } else { |
| 13 | 1738 printf("\t.long %d\n",cadr(e)); |
| 3 | 1739 gpc += size_of_int; |
| 13 | 1740 } |
| 1741 } else if(t!=CHAR) { | |
| 1742 gpc += size_of_int; | |
| 1743 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 18 | 1744 printf("\t.long %s\n",(char *)caddr(cadr(e))); |
| 13 | 1745 } else if(car(e)==FNAME) { |
| 1746 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1747 } else if(car(e)==STRING) { | |
| 1748 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1749 l = fwdlabel(); | |
| 1750 printf("\t.long _%d\n",l); | |
| 1751 printf(".section\t.rodata\n"); | |
| 1752 printf("_%d:\n",l); | |
| 1753 output_mode = RODATA_EMIT_MODE; | |
| 1754 } | |
| 1755 ascii((char *)cadr(e)); | |
| 1756 } else error(TYERR); | |
| 0 | 1757 } |
| 1758 } | |
| 1759 | |
| 1760 void | |
| 1761 emit_data_closing(NMTBL *n) | |
| 1762 { | |
| 1763 int lb; | |
| 18 | 1764 if (mode==GDECL) { |
| 0 | 1765 data_mode(0); |
| 1766 lb=fwdlabel(); | |
| 1767 printf("_%d:\n",lb); | |
| 1768 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1769 } | |
| 1770 } | |
| 1771 | |
| 1772 void | |
| 1773 global_table(void) | |
| 1774 { | |
| 1775 NMTBL *n; | |
| 12 | 1776 int init; |
| 1777 init=0; | |
| 0 | 1778 for(n=ntable;n < &ntable[GSYMS];n++) { |
| 1779 if (n->sc == GVAR && n->dsp != -1) { | |
| 1780 /* n->dsp = -1 means initialized global */ | |
| 12 | 1781 if (init==0) { |
| 1782 data_mode(0); | |
| 1783 init=1; | |
| 1784 } | |
| 0 | 1785 printf(".comm %s,%d\n",n->nm,size(n->ty)); |
| 1786 } | |
| 1787 } | |
| 1788 } | |
| 1789 | |
| 1790 void | |
| 1791 local_table(void) | |
| 1792 { | |
| 1793 NMTBL *n; | |
| 12 | 1794 int init; |
| 1795 init=0; | |
| 0 | 1796 /* static local variables */ |
| 1797 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1798 if (n->sc == GVAR) { | |
| 12 | 1799 if (init==0) { |
| 1800 data_mode(0); | |
| 1801 init=1; | |
| 1802 } | |
| 0 | 1803 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); |
| 1804 } | |
| 1805 } | |
| 1806 } | |
| 1807 | |
| 1808 void | |
| 1809 text_mode(void) | |
| 1810 { | |
| 1811 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1812 printf(".text\n"); | |
| 1813 printf("\t.align 2\n"); | |
| 1814 output_mode = TEXT_EMIT_MODE; | |
| 1815 } | |
| 1816 } | |
| 1817 | |
| 1818 void | |
| 1819 data_mode(char *name) | |
| 1820 { | |
| 1821 if (output_mode!=DATA_EMIT_MODE) { | |
| 1822 printf(".data\n"); | |
| 1823 output_mode = DATA_EMIT_MODE; | |
| 1824 } | |
| 1825 if (name) | |
| 1826 printf("\t.type\t%s,@object\n",name); | |
| 1827 } | |
| 1828 | |
| 1829 int | |
| 1830 lvar(int l) | |
| 1831 { | |
| 1832 if (l<0) { | |
| 1833 if (fnptr->sc==CODE) | |
| 1834 return l+code_disp_offset; | |
| 1835 else | |
| 1836 return l+disp_offset; | |
| 1837 } else { | |
| 3 | 1838 if (fnptr->sc==CODE) |
| 5 | 1839 return -l+code_arg_offset; |
| 3 | 1840 else |
| 1841 return l+arg_offset; | |
| 0 | 1842 } |
| 1843 } | |
| 1844 | |
| 1845 /* end */ |