Mercurial > hg > CbC > old > device
annotate mc-nop-386.c @ 53:64a4e3789fd2 parallel-assign
parallel assign works.
| author | kono |
|---|---|
| date | Tue, 18 Feb 2003 20:14:19 +0900 |
| parents | ddaa1aa5b49b |
| children | 1a6b6a7bdca6 |
| 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) ; | |
| 50 | 12 extern void code_enter1(int args); |
| 18 | 13 extern void code_init(void); |
| 50 | 14 extern void code_leave(char *name) ; |
| 15 extern void leave(int control,char *name) ; | |
| 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) ; | |
| 50 | 20 extern void enter1() ; |
| 18 | 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); | |
| 49 | 30 extern int assign_expr0(int e,int e1,int type,int type1); |
| 31 extern int integral(int t); | |
| 50 | 32 extern void tree_print_t(int e,int t); |
| 33 extern int rvalue_t(int e,int t); | |
| 0 | 34 |
| 42 | 35 static int edx_setup() ; |
| 18 | 36 static int lvar(int l); |
| 37 static void jump(int e1, int env); | |
| 38 static void data_mode(char *name); | |
| 39 static void text_mode(void); | |
| 40 static void assign(int e1); | |
| 41 static void assop(int e1); | |
| 42 static void b_expr(int e1, char cond, int l1); | |
| 43 static void emit_push(void); | |
| 44 static void free_register(int i); | |
| 45 static void function(int e1); | |
| 46 static void global_table(void) ; | |
| 47 /* static void indexy(char *op, char *gvar); */ | |
| 48 /* static void jmp_eq_label(int l); */ | |
| 49 /* static void jmp_label(int l); */ | |
| 50 static void ld_indexx(int byte, int n, int xreg); | |
| 51 static void local_table(void) ; | |
| 52 static void machinop(int e1); | |
| 53 static void rexpr(int e1, int l1, char *s); | |
| 54 static void rindirect(int e1); | |
| 55 static void sassign(int e1); | |
| 56 static void shift(char *op, int xreg) ; | |
| 57 /* static void st_indexx(int byte, int n, int xreg); */ | |
| 58 static void string(int e1); | |
| 43 | 59 static void tosop(int op,int reg); |
| 42 | 60 static void edx_cleanup(); |
| 26 | 61 static void use_register(int virt, int real, int move); |
| 47 | 62 static void emit_copy(int from,int to,int length,int offset,int value); |
| 51 | 63 static int is_same_type(int s,int t); |
| 18 | 64 |
| 65 extern int error(int n); | |
| 66 extern int fwdlabel(void); | |
| 67 extern void fwddef(int l); | |
| 68 extern int backdef(void); | |
| 69 extern int size(int t); | |
| 49 | 70 extern int list4(int e1, int e2, int e3,int e4); |
| 18 | 71 extern int list3(int e1, int e2, int e3); |
| 49 | 72 extern int list2(int e1, int e2); |
| 2 | 73 extern int scalar(int); |
| 74 extern int reverse0(int); | |
| 49 | 75 extern void remove0(int *list,int element); |
| 0 | 76 |
| 77 #define TEXT_EMIT_MODE 0 | |
| 78 #define DATA_EMIT_MODE 1 | |
| 79 #define RODATA_EMIT_MODE 2 | |
| 80 | |
| 18 | 81 static int output_mode = TEXT_EMIT_MODE; |
| 82 static int data_alignment = 0; | |
| 0 | 83 |
| 36 | 84 static int code_disp_label; |
| 85 static int func_disp_label; | |
| 86 | |
| 0 | 87 /* |
| 53 | 88 -16 -8 local2 |
| 89 -12 -4 local1 | |
| 90 -8 8 arg3 | |
| 91 -4 4 arg2 | |
| 92 0 0 arg1 | |
| 93 local2 -20 4 0 (%edi) | |
| 94 local1 <-- -16 0 local variable 0 (%esi) | |
| 50 | 95 %edi -12 <- disp_offset %ebp |
| 96 %esi -8 | |
| 0 | 97 %ebx -4 |
| 98 %ebp = %esp 0 | |
| 99 %eip 4 <- arg_offset | |
| 53 | 100 arg1 8 0 |
| 101 arg2 12 4 | |
| 50 | 102 see enter/enter1/leave see code_enter |
| 0 | 103 */ |
| 104 int arg_offset = 8; | |
| 3 | 105 int disp_offset = -12; |
| 106 int func_disp_offset = -12; | |
| 53 | 107 int code_disp_offset = 0; |
| 108 int jump_offset = 0; | |
| 109 | |
| 3 | 110 int size_of_int = 4; |
| 0 | 111 int endian = 0; |
| 112 int MAX_REGISTER=6; /* intel386¤Î¥ì¥¸¥¹¥¿¤ò4¤Ä¤Þ¤Ç»È¤¦*/ | |
| 113 int REAL_MAX_REGISTER=8; /* intel386¤Î¥ì¥¸¥¹¥¿¤¬8¤Ä¤È¤¤¤¦¤³¤È*/ | |
| 114 int MAX_DATA_REG=4; | |
| 115 int MAX_POINTER=3; | |
| 116 int MAX_REGISTGER_VAR=2; | |
| 117 | |
| 118 static int creg; /* current register */ | |
| 119 static int dreg; /* temporary register */ | |
| 120 static int reg_sp; /* REGister Stack-Pointer */ | |
| 121 | |
| 122 | |
| 123 #define REG_EAX 0 | |
| 124 #define REG_EBX 1 | |
| 125 #define REG_ECX 2 | |
| 126 #define REG_EDX 3 | |
| 127 #define REG_ESI 4 | |
| 128 #define REG_EDI 5 | |
| 129 #define REG_EBP 6 | |
| 130 #define REG_ESP 7 | |
| 131 | |
| 132 | |
| 133 #define DATA_REG 0 | |
| 134 #define POINTER_REG 3 | |
| 135 static char *reg_name[8]; | |
| 136 static char *reg_name_l[4]; | |
| 13 | 137 static char *reg_name_w[4]; |
| 0 | 138 |
| 139 /* | |
| 140 creg currrent virtual register | |
| 141 dreg spare virtual register | |
| 142 | |
| 143 rname[creg] currrent real register | |
| 144 rname[dreg] spare real register | |
| 145 | |
| 146 regs[] virtual register usage | |
| 40 | 147 regv[] value in virtual register flag |
| 0 | 148 |
| 149 reg_name[rname[creg]] | |
| 150 */ | |
| 151 | |
| 152 #define MAX_MAX 10 | |
| 153 static int rname[MAX_MAX]; | |
| 154 static int regs[MAX_MAX]; /* »È¤ï¤ì¤Æ¤¤¤ë¥ì¥¸¥¹¥¿¤ò¼¨¤¹¥Õ¥é¥° */ | |
| 155 static int reg_stack[MAX_MAX]; /* ¼ÂºÝ¤Î¥ì¥¸¥¹¥¿¤ÎÎΰè */ | |
| 40 | 156 static int regv[MAX_MAX]; /* Ãͤ¬Æþ¤Ã¤Æ¤¤¤ë¤«¤É¤¦¤« */ |
| 0 | 157 |
| 158 void | |
| 159 code_init(void) | |
| 160 { | |
| 24 | 161 arg_offset = 8; |
| 162 func_disp_offset = -12; | |
| 163 disp_offset = -12; | |
| 164 size_of_int = 4; | |
| 165 endian = 0; | |
| 166 MAX_REGISTER=6; | |
| 167 MAX_DATA_REG=4; | |
| 168 MAX_POINTER=3; | |
| 0 | 169 MAX_REGISTER_VAR=2; |
| 170 | |
| 171 reg_name[REG_EAX] = "%eax"; | |
| 172 reg_name[REG_EBX] = "%ebx"; | |
| 173 reg_name[REG_ECX] = "%ecx"; | |
| 174 reg_name[REG_EDX] = "%edx"; | |
| 175 reg_name[REG_ESI] = "%esi"; | |
| 176 reg_name[REG_EDI] = "%edi"; | |
| 177 reg_name[REG_EBP] = "%ebp"; | |
| 178 reg_name[REG_ESP] = "%esp"; | |
| 179 reg_name_l[REG_EAX] = "%al"; | |
| 180 reg_name_l[REG_EBX] = "%bl"; | |
| 181 reg_name_l[REG_ECX] = "%cl"; | |
| 182 reg_name_l[REG_EDX] = "%dl"; | |
| 13 | 183 reg_name_w[REG_EAX] = "%ax"; |
| 184 reg_name_w[REG_EBX] = "%bx"; | |
| 185 reg_name_w[REG_ECX] = "%cx"; | |
| 186 reg_name_w[REG_EDX] = "%dx"; | |
| 0 | 187 |
| 188 } | |
| 189 | |
| 190 char * | |
| 18 | 191 register_name(int i,int byte) |
| 0 | 192 { |
| 38 | 193 if (i<0) { |
| 194 error(REG_ERR); | |
| 195 return "%eax"; | |
| 196 } | |
| 24 | 197 if (byte && rname[i] <= REG_EDX) { |
| 18 | 198 return reg_name_l[rname[i]]; |
| 199 } else { | |
| 24 | 200 return reg_name[rname[i]]; /* should be error */ |
| 18 | 201 } |
| 0 | 202 } |
| 203 | |
| 204 int | |
| 205 get_register(void) | |
| 206 { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¥ì¥¸¥¹¥¿¤òÄ´¤Ù¤ë */ | |
| 207 int i; | |
| 208 for(i=0;i<MAX_REGISTER;i++) { | |
| 209 if (! regs[i]) { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¤Ê¤é */ | |
| 210 regs[i]=1; /* ¤½¤Î¥ì¥¸¥¹¥¿¤ò»È¤¦¤³¤È¤òÀë¸À¤· */ | |
| 211 return i; /* ¤½¤Î¾ì½ê¤òɽ¤¹ÈÖ¹æ¤òÊÖ¤¹ */ | |
| 212 } | |
| 213 } | |
| 214 return -1; /* ¶õ¤¤¤Æ¤¤¤ë¾ì½ê¤¬¤Ê¤¤¤Ê¤é¡¢¤½¤ì¤òɽ¤¹ -1 ¤òÊÖ¤¹ */ | |
| 215 } | |
| 216 | |
| 217 void | |
| 218 free_register(int i) { /* ¤¤¤é¤Ê¤¯¤Ê¤Ã¤¿¥ì¥¸¥¹¥¿¤ò³«Êü */ | |
| 40 | 219 regv[i]=regs[i]=0; |
| 0 | 220 } |
| 221 | |
| 222 int | |
| 223 register_full(void) | |
| 224 { | |
| 225 int i; | |
| 226 for(i=0;i<MAX_REGISTER;i++) { | |
| 227 if (! regs[i]) { | |
| 228 return 0; | |
| 229 } | |
| 230 } | |
| 231 return 1; | |
| 232 } | |
| 233 | |
| 23 | 234 static |
| 235 int | |
| 236 free_register_count(void) | |
| 237 { | |
| 238 int i,count; | |
| 239 count = 0; | |
| 240 for(i=0;i<MAX_REGISTER;i++) { | |
| 42 | 241 if (! regs[i] && ! regv[i]) count++; |
| 23 | 242 } |
| 243 return count; | |
| 244 } | |
| 245 | |
| 42 | 246 static void |
| 247 free_all_register(void) | |
| 248 { | |
| 249 int i; | |
| 250 for(i=0;i<MAX_REGISTER;i++) { | |
| 251 regs[i]=regv[i]=0; | |
| 252 } | |
| 253 creg = get_register(); | |
| 254 dreg = get_register(); | |
| 255 return; | |
| 256 } | |
| 257 | |
| 40 | 258 void |
| 259 use_register_var(int i) { | |
| 260 regv[i]=1; | |
| 261 } | |
| 262 | |
| 263 static int creg_regvar = -1; | |
| 264 static int creg_regvar_back; | |
| 265 static int creg_back; | |
| 266 | |
| 267 void | |
| 268 creg_destroy() { | |
| 269 creg_back = creg; creg_regvar_back = creg_regvar; | |
| 270 if (creg_regvar>=0) | |
| 271 creg = creg_regvar; | |
| 272 creg_regvar=-1; | |
| 273 } | |
| 274 | |
| 275 void | |
| 276 creg_un_destroy() { | |
| 277 creg = creg_back; creg_regvar = creg_regvar_back; | |
| 278 } | |
| 279 | |
| 42 | 280 void |
| 281 register_usage(char *s) | |
| 282 { | |
| 283 int i; | |
| 284 printf("# %d: %s:",lineno,s); | |
| 285 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 286 for(i=0;i<MAX_REGISTER;i++) { | |
| 287 printf("%d",regs[i]); | |
| 288 } | |
| 289 printf(":"); | |
| 290 for(i=0;i<MAX_REGISTER;i++) { | |
| 291 printf("%d",regv[i]); | |
| 292 } | |
| 293 #if 0 | |
| 294 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 295 for(i=reg_sp;i>=0;i--) { | |
| 296 if(reg_stack[i]>=0) | |
| 297 printf(" %s",register_name(reg_stack[i],0)); | |
| 298 } | |
| 299 #endif | |
| 300 printf("\n"); | |
| 301 } | |
| 23 | 302 |
| 0 | 303 void |
| 304 gexpr_init(void) | |
| 305 { | |
| 306 while(reg_sp > 0) { | |
| 307 free_register(reg_stack[--reg_sp]); | |
| 308 } | |
| 309 text_mode(); | |
| 26 | 310 use_register(creg,REG_EAX,0); |
| 42 | 311 regv[dreg]=0; |
| 40 | 312 creg_regvar = -1; |
| 42 | 313 register_usage("gexpr_init"); |
| 0 | 314 } |
| 315 | |
| 42 | 316 |
| 0 | 317 void |
| 318 emit_init(void) | |
| 319 { | |
| 320 int i; | |
| 40 | 321 for(i=0;i<REAL_MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} |
| 42 | 322 free_all_register(); |
| 0 | 323 reg_sp = 0; |
| 324 text_mode(); | |
| 325 } | |
| 326 | |
| 327 int | |
| 328 virtual(int real) | |
| 329 { | |
| 330 int real_v,i; | |
| 331 real_v = -1; | |
| 332 for(i=0;i<MAX_REGISTER;i++) { | |
| 333 if (rname[i]==real) { | |
| 334 real_v=i; | |
| 335 break; | |
| 336 } | |
| 337 } | |
| 23 | 338 /* if (real_v == -1) |
| 339 error(-1); */ | |
| 0 | 340 return real_v; |
| 341 } | |
| 342 | |
| 343 void | |
| 344 use_register(int virt, int real, int move) | |
| 345 { | |
| 346 int real_v; | |
| 347 char *move_op; | |
| 348 if (rname[virt]==real) | |
| 349 return; | |
| 350 real_v = virtual(real); | |
| 351 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 41 | 352 if (move || (regv[real_v])) { |
| 0 | 353 printf(move_op,reg_name[rname[virt]],reg_name[real]); |
| 354 } | |
| 355 rname[real_v] = rname[virt]; | |
| 356 rname[virt] = real; | |
| 357 } | |
| 358 | |
| 359 void | |
| 360 use_pointer(int virt, int move) | |
| 361 { | |
| 362 int i; | |
| 363 if (rname[virt]>=POINTER_REG) | |
| 364 return; | |
| 365 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 366 if (!regs[virtual(i)]) { | |
| 367 use_register(virt,i,move); | |
| 368 return; | |
| 369 } | |
| 370 } | |
| 371 /* we prefer EBX */ | |
| 372 use_register(virt,REG_EBX,move); | |
| 373 } | |
| 374 | |
| 375 void | |
| 376 use_data_reg(int virt, int move) | |
| 377 { | |
| 378 int i; | |
| 379 if (rname[virt]<MAX_DATA_REG) | |
| 380 return; | |
| 381 for(i=0;i<MAX_DATA_REG;i++) { | |
| 382 if (!regs[virtual(i)]) { | |
| 383 use_register(virt,i,move); | |
| 384 return; | |
| 385 } | |
| 386 } | |
| 387 /* we prefer EBX */ | |
| 388 use_register(virt,REG_EBX,move); | |
| 389 } | |
| 390 | |
| 391 int | |
| 392 pop_register(void) | |
| 393 { /* ¥ì¥¸¥¹¥¿¤«¤éÃͤò¼è¤ê½Ð¤¹ */ | |
| 42 | 394 return reg_stack[--reg_sp]; |
| 0 | 395 } |
| 396 | |
| 397 int | |
| 398 stack_used(void) { | |
| 399 return reg_stack[--reg_sp]<0; | |
| 400 } | |
| 401 | |
| 402 void | |
| 403 emit_push(void) | |
| 404 { | |
| 405 int new_reg; | |
| 406 new_reg = get_register(); | |
| 407 if(new_reg<0) { /* ¤â¤¦¥ì¥¸¥¹¥¿¤¬¤Ê¤¤ */ | |
| 408 reg_stack[reg_sp++] = -1; | |
| 18 | 409 printf("\tpushl %s\n",register_name(creg,0)); |
| 42 | 410 /* creg is used soon, don't regv[creg]=0 */ |
| 0 | 411 } else { |
| 412 reg_stack[reg_sp++] = creg; /* push ¤¹¤ë¤«¤ï¤ê¤Ë¥ì¥¸¥¹¥¿¤ò»È¤¦ */ | |
| 18 | 413 creg = new_reg; |
| 42 | 414 regv[creg]=1; |
| 0 | 415 } |
| 42 | 416 } |
| 417 | |
| 418 void | |
| 419 emit_push_x(int xreg) | |
| 420 { | |
| 421 int new_reg; | |
| 422 new_reg = get_register(); | |
| 423 if(new_reg<0) { /* ¤â¤¦¥ì¥¸¥¹¥¿¤¬¤Ê¤¤ */ | |
| 424 reg_stack[reg_sp++] = -1; | |
| 425 printf("\tpushl %s\n",register_name(xreg,0)); | |
| 426 /* creg is used soon, don't regv[xreg]=0 */ | |
| 427 } else { | |
| 428 reg_stack[reg_sp++] = xreg; /* push ¤¹¤ë¤«¤ï¤ê¤Ë¥ì¥¸¥¹¥¿¤ò»È¤¦ */ | |
| 429 xreg = new_reg; | |
| 430 regv[xreg]=1; | |
| 431 } | |
| 0 | 432 } |
| 433 | |
| 18 | 434 int |
| 0 | 435 emit_pop(int type) |
| 436 { | |
| 18 | 437 int xreg; |
| 42 | 438 if ((xreg=pop_register())==-1) { |
| 0 | 439 if (type==POINTER_REG) |
| 440 use_pointer(dreg,0); | |
| 441 else if (type==DATA_REG) | |
| 442 use_data_reg(dreg,0); | |
| 42 | 443 if (regv[dreg]) { |
| 444 printf("# emit_pop dreg conflict\n"); | |
| 445 } | |
| 18 | 446 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 447 xreg = dreg; |
| 42 | 448 regv[xreg]=1; |
| 449 } | |
| 450 return xreg; | |
| 451 } | |
| 452 | |
| 453 static void | |
| 454 emit_pop_free(int xreg) | |
| 455 { | |
| 456 if (xreg==dreg) { | |
| 457 regv[dreg]=0; | |
| 43 | 458 } else if (xreg!=-1) { |
| 42 | 459 free_register(xreg); |
| 0 | 460 } |
| 461 } | |
| 462 | |
| 463 int | |
| 464 get_register_var(void) | |
| 465 { | |
| 466 int i; | |
| 467 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 468 if (! regs[i]) { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¤Ê¤é */ | |
| 469 regs[i]=1; /* ¤½¤Î¥ì¥¸¥¹¥¿¤ò»È¤¦¤³¤È¤òÀë¸À¤· */ | |
| 41 | 470 regv[i]=0; |
| 0 | 471 return i; /* ¤½¤Î¾ì½ê¤òɽ¤¹ÈÖ¹æ¤òÊÖ¤¹ */ |
| 472 } | |
| 473 } | |
| 474 return -1; | |
| 475 } | |
| 476 | |
| 477 void | |
| 478 gexpr(int e1) | |
| 479 { | |
| 480 gexpr_init(); | |
| 24 | 481 #if 0 |
| 32 | 482 if(lineno==2862) { |
| 24 | 483 g_expr(e1); /*break here*/ |
| 484 return; | |
| 485 } | |
| 486 #endif | |
| 0 | 487 g_expr(e1); |
| 42 | 488 } |
| 489 | |
| 490 int | |
| 491 csvalue() | |
| 492 { | |
| 493 return rname[creg]; /* for siwtch value */ | |
| 0 | 494 } |
| 495 | |
| 496 void | |
| 497 g_expr(int e1) | |
| 498 { | |
| 22 | 499 int e2,e3/*,e4*/; |
| 0 | 500 char *xrn; |
| 501 NMTBL *n; | |
| 502 | |
| 503 if (chk) return; | |
| 504 e2 = cadr(e1); | |
| 505 switch (car(e1)){ | |
| 506 case GVAR: | |
| 507 /* use_pointer(creg,0); */ | |
| 18 | 508 printf("\tmovl $%s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 509 regv[creg]=1; |
| 0 | 510 return; |
| 511 case RGVAR: | |
| 512 /* use_pointer(creg,0); */ | |
| 18 | 513 printf("\tmovl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 514 regv[creg]=1; |
| 0 | 515 return; |
| 516 case CRGVAR: | |
| 27 | 517 printf("\tmovsbl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 518 regv[creg]=1; |
| 0 | 519 return; |
| 520 case LVAR: | |
| 521 /* use_pointer(creg,0); */ | |
| 18 | 522 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 523 regv[creg]=1; |
| 0 | 524 return; |
| 525 case REGISTER: | |
| 526 /* this is of course redundant... */ | |
| 18 | 527 /* we can use rname for this? */ |
| 528 /* or why not creg=e2? */ | |
| 529 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); | |
| 42 | 530 regv[creg]=1; |
| 0 | 531 return; |
| 532 case RLVAR: | |
| 18 | 533 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 534 regv[creg]=1; |
| 0 | 535 return; |
| 536 case CRLVAR: | |
| 21 | 537 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 538 regv[creg]=1; |
| 0 | 539 return; |
| 540 case FNAME: | |
| 18 | 541 printf("\tmovl $%s,%s\n",((NMTBL *)e2)->nm,register_name(creg,0)); |
| 42 | 542 regv[creg]=1; |
| 0 | 543 return; |
| 544 case CONST: /* ÂåÆþ¤¹¤ëÃͤ¬0¤Ç¤âÆÃÊ̤ʽèÍý¤Ï¤·¤Ê¤¤ */ | |
| 18 | 545 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 42 | 546 regv[creg]=1; |
| 0 | 547 return; |
| 548 case STRING: | |
| 549 string(e1); | |
| 42 | 550 regv[creg]=1; |
| 0 | 551 return; |
| 552 case FUNCTION: | |
| 553 function(e1); | |
| 42 | 554 regv[creg]=1; |
| 0 | 555 return; |
| 556 case CODE: | |
| 557 jump(e2,caddr(e1)); | |
| 558 return; | |
| 559 case INDIRECT: | |
| 560 g_expr(e2); | |
| 561 return; | |
| 562 case RINDIRECT: case CRINDIRECT: | |
| 563 rindirect(e1); | |
| 564 return; | |
| 565 case ADDRESS: | |
| 566 g_expr(e2); | |
| 567 return; | |
| 568 case MINUS: /* ¥ì¥¸¥¹¥¿¤ËÂФ·¡¢negl¤ò¼Â¹Ô¤¹¤ì¤Ð¼Â¸½²Äǽ */ | |
| 569 g_expr(e2); | |
| 570 /* use_data_reg(creg,1); */ | |
| 18 | 571 printf("\tnegl %s\n", register_name(creg,0)); |
| 0 | 572 return; |
| 573 case BNOT: /* ~ */ | |
| 574 g_expr(e2); | |
| 575 /* use_data_reg(creg,1); */ | |
| 18 | 576 printf("\tnotl %s\n", register_name(creg,0)); |
| 0 | 577 return; |
| 578 case LNOT: /* ! */ | |
| 579 g_expr(e2); | |
| 580 use_data_reg(creg,1); | |
| 18 | 581 xrn = register_name(creg,1); |
| 582 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 583 printf("\tsete %s\n", xrn); | |
| 584 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 0 | 585 return; |
| 586 case PREINC: | |
| 587 if (car(e2)==REGISTER) { | |
| 18 | 588 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 589 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 590 return; |
| 591 } | |
| 592 g_expr(e2); | |
| 18 | 593 xrn = register_name(creg,0); |
| 594 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 595 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 0 | 596 return; |
| 597 case POSTINC: | |
| 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); | |
| 604 emit_push(); | |
| 41 | 605 xrn = register_name((e2=emit_pop(0)),0); |
| 18 | 606 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 607 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); |
| 42 | 608 emit_pop_free(e2); |
| 0 | 609 return; |
| 610 case CPOSTINC: | |
| 611 /* char *p; *p++ */ | |
| 612 if (car(e2)==REGISTER) { | |
| 18 | 613 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 614 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 0 | 615 return; |
| 616 } | |
| 617 g_expr(e2); | |
| 42 | 618 emit_push(); |
| 41 | 619 xrn = register_name((e2=emit_pop(0)),1); |
| 18 | 620 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 621 printf("\tincl (%s)\n",xrn); |
| 42 | 622 emit_pop_free(e2); |
| 0 | 623 return; |
| 624 case CPREINC: | |
| 625 if (car(e2)==REGISTER) { | |
| 18 | 626 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 627 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 628 return; |
| 629 } | |
| 630 g_expr(e2); | |
| 18 | 631 printf("\tincl (%s)\n",register_name(creg,0)); |
| 21 | 632 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 0 | 633 return; |
| 634 case CPOSTDEC: | |
| 635 if (car(e2)==REGISTER) { | |
| 18 | 636 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 637 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 0 | 638 return; |
| 639 } | |
| 640 g_expr(e2); | |
| 21 | 641 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 18 | 642 printf("\tdecl (%s)\n",register_name(creg,0)); |
| 0 | 643 return; |
| 644 case CPREDEC: | |
| 645 if (car(e2)==REGISTER) { | |
| 18 | 646 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 647 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 648 return; |
| 649 } | |
| 650 g_expr(e2); | |
| 651 emit_push(); | |
| 18 | 652 e2 = emit_pop(0); |
| 653 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 21 | 654 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); |
| 42 | 655 emit_pop_free(e2); |
| 0 | 656 return; |
| 657 case MUL: case UMUL: | |
| 658 case DIV: case UDIV: | |
| 659 case MOD: case UMOD: | |
| 660 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT: | |
| 661 case ADD: case SUB: case BAND: case EOR: case BOR: | |
| 662 machinop(e1); | |
| 663 return; | |
| 664 case COND: | |
| 665 e2=fwdlabel(); | |
| 666 b_expr(cadr(e1),0,e2); | |
| 22 | 667 use_register(creg,REG_EAX,0); |
| 0 | 668 g_expr(caddr(e1)); |
| 22 | 669 /* e4 = rname[creg]; this is a bad idea */ |
| 670 use_register(creg,REG_EAX,1); | |
| 0 | 671 jmp(e3=fwdlabel()); |
| 672 fwddef(e2); | |
| 22 | 673 use_register(creg,REG_EAX,0); |
| 0 | 674 g_expr(cadddr(e1)); |
| 22 | 675 /* use_register(creg,e4,1); */ |
| 676 use_register(creg,REG_EAX,1); | |
| 0 | 677 fwddef(e3); |
| 678 return; | |
| 37 | 679 case RSTRUCT: |
| 680 g_expr(e2); | |
| 681 return; | |
| 0 | 682 case SASS: |
| 683 sassign(e1); | |
| 684 return; | |
| 685 case ASS: case CASS: | |
| 686 assign(e1); | |
| 687 return; | |
| 688 case ASSOP: case CASSOP: | |
| 689 assop(e1); | |
| 690 return; | |
| 691 case COMMA: | |
| 692 g_expr(e2); | |
| 693 g_expr(caddr(e1)); | |
| 694 return; | |
| 695 case RETURN: | |
| 696 n = (NMTBL *)e2; | |
| 697 if (retcont==0) | |
| 698 retcont=fwdlabel(); | |
| 18 | 699 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 42 | 700 regv[creg]=1; |
| 0 | 701 return; |
| 702 case ENVIRONMENT: | |
| 18 | 703 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 42 | 704 regv[creg]=1; |
| 0 | 705 return; |
| 706 default: | |
| 707 b_expr(e1,1,e2=fwdlabel()); /* including > < ... */ | |
| 18 | 708 xrn = register_name(creg,0); |
| 709 printf("\txorl %s,%s\n",xrn,xrn); | |
| 0 | 710 jmp(e3=fwdlabel()); |
| 711 fwddef(e2); | |
| 18 | 712 printf("\tmovl $1,%s\n",xrn); |
| 0 | 713 fwddef(e3); |
| 42 | 714 regv[creg]=1; |
| 0 | 715 } |
| 716 } | |
| 717 | |
| 718 void | |
| 719 bexpr(int e1, char cond, int l1) | |
| 720 { | |
| 721 gexpr_init(); | |
| 722 b_expr(e1,cond,l1); | |
| 723 } | |
| 724 | |
| 725 void | |
| 726 b_expr(int e1, char cond, int l1) | |
| 727 { | |
| 728 int e2,l2; | |
| 729 if (chk) return; | |
| 730 e2=cadr(e1); | |
| 731 switch(car(e1)) { | |
| 732 case LNOT: | |
| 733 b_expr(e2,!cond,l1); | |
| 734 return; | |
| 735 case GT: | |
| 736 rexpr(e1,l1,cond?"g":"le"); | |
| 737 return; | |
| 738 case UGT: | |
| 739 rexpr(e1,l1,cond?"a":"be"); | |
| 740 return; | |
| 741 case GE: | |
| 742 rexpr(e1,l1,cond?"ge":"l"); | |
| 743 return; | |
| 744 case UGE: | |
| 745 rexpr(e1,l1,cond?"ae":"b"); | |
| 746 return; | |
| 747 case LT: | |
| 748 rexpr(e1,l1,cond?"l":"ge"); | |
| 749 return; | |
| 750 case ULT: | |
| 751 rexpr(e1,l1,cond?"b":"ae"); | |
| 752 return; | |
| 753 case LE: | |
| 754 rexpr(e1,l1,cond?"le":"g"); | |
| 755 return; | |
| 756 case ULE: | |
| 757 rexpr(e1,l1,cond?"be":"a"); | |
| 758 return; | |
| 759 case EQ: | |
| 760 rexpr(e1,l1,cond?"e":"ne"); | |
| 761 return; | |
| 762 case NEQ: | |
| 763 rexpr(e1,l1,cond?"ne":"e"); | |
| 764 return; | |
| 765 case LAND: | |
| 766 b_expr(e2,0,cond?(l2=fwdlabel()):l1); | |
| 767 b_expr(caddr(e1),cond,l1); | |
| 768 if(cond) fwddef(l2); | |
| 769 return; | |
| 770 case LOR: | |
| 771 b_expr(e2,1,cond?l1:(l2=fwdlabel())); | |
| 772 b_expr(caddr(e1),cond,l1); | |
| 773 if(!cond) fwddef(l2); | |
| 774 return; | |
| 775 case CRGVAR: | |
| 18 | 776 printf("\tcmpb $0,%s\n",(char *)caddr(e1)); |
| 0 | 777 jcond(l1,cond); |
| 778 return; | |
| 779 case CRLVAR: | |
| 780 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e2)); | |
| 781 jcond(l1,cond); | |
| 782 return; | |
| 783 case RGVAR: | |
| 18 | 784 printf("\tcmpl $0,%s\n",(char *)caddr(e1)); |
| 0 | 785 jcond(l1,cond); |
| 786 return; | |
| 787 case RLVAR: | |
| 788 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e2)); | |
| 789 jcond(l1,cond); | |
| 790 return; | |
| 791 case REGISTER: | |
| 18 | 792 printf("\tcmpl $0,%s\n",register_name(e2,0)); |
| 0 | 793 jcond(l1,cond); |
| 794 return; | |
| 795 case CONST: | |
| 796 if((cond&&e2)||(!cond&&!e2)) jmp(l1); | |
| 797 return; | |
| 798 default: | |
| 799 g_expr(e1); | |
| 18 | 800 printf("\tcmpl $0,%s\n",register_name(creg,0)); |
| 0 | 801 jcond(l1,cond); |
| 802 return; | |
| 803 } | |
| 804 } | |
| 805 | |
| 806 void | |
| 807 ascii(char *s) | |
| 808 { | |
| 809 printf("\t.string \""); | |
| 810 while(*s) { | |
| 811 if (*s=='\n') | |
| 812 printf("%cn",92); | |
| 813 else if (*s<' ') | |
| 814 printf("%c%03o",92,*s); | |
| 815 else if (*s==34) | |
| 816 printf("%c%c",92,34); | |
| 817 else | |
| 818 printf("%c",*s); | |
| 819 s++; | |
| 820 } | |
| 821 printf("%c\n",34); | |
| 822 } | |
| 823 | |
| 824 void | |
| 825 string(int e1) | |
| 826 { | |
| 827 char *s; | |
| 828 int i,lb; | |
| 829 | |
| 830 if (0) { | |
| 831 s=(char *)cadr(e1); | |
| 832 lb=fwdlabel(); | |
| 833 printf("\tjmp _%d\n",lb); | |
| 834 i=backdef(); | |
| 835 ascii(s); | |
| 836 printf("\t.align 2\n"); | |
| 837 fwddef(lb); | |
| 18 | 838 printf("\tlea _%d,%s\n",i,register_name(creg,0)); |
| 0 | 839 } else { |
| 840 s=(char *)cadr(e1); | |
| 841 printf(".section\t.rodata\n"); | |
| 842 lb=fwdlabel(); | |
| 843 printf("_%d:\n",lb); | |
| 844 ascii(s); | |
| 845 if (output_mode==TEXT_EMIT_MODE) { | |
| 846 printf(".text\n"); | |
| 847 } else { | |
| 848 text_mode(); | |
| 849 } | |
| 18 | 850 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); |
| 0 | 851 } |
| 852 } | |
| 853 | |
| 13 | 854 #define MAX_COPY_LEN 20 |
| 855 | |
| 856 void | |
| 47 | 857 emit_copy(int from,int to,int length,int offset,int value) |
| 13 | 858 { |
| 39 | 859 int fix = 0; |
| 860 if (length<=0) return; | |
| 13 | 861 switch (length) { |
| 862 case 0: break; | |
| 863 case 1: | |
| 38 | 864 printf("\tmovb %d(%s),%s\n",offset,register_name(from,0), reg_name_l[rname[dreg]] ); |
| 865 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 866 break; |
| 867 case 2: | |
| 38 | 868 printf("\tmovw %d(%s),%s\n",offset,register_name(from,0), reg_name_w[rname[dreg]] ); |
| 869 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 870 break; |
| 871 case 4: | |
| 38 | 872 printf("\tmovl %d(%s),%s\n",offset,register_name(from,0), register_name(dreg,0)); |
| 873 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset,register_name(to,0)); | |
| 13 | 874 break; |
| 875 default: | |
| 876 if (length <=MAX_COPY_LEN) { | |
| 14 | 877 for(;length>=4;length-=4,offset+=4) |
| 47 | 878 emit_copy(from,to,4,offset,0); |
| 14 | 879 for(;length>=2;length-=2,offset+=2) |
| 47 | 880 emit_copy(from,to,2,offset,0); |
| 13 | 881 if(length>0) |
| 47 | 882 emit_copy(from,to,length,offset,0); |
| 39 | 883 break; |
| 13 | 884 } |
| 39 | 885 use_register(from,REG_ESI,1); |
| 886 use_register(to, REG_EDI,1); | |
| 887 use_register(dreg,REG_ECX,0); | |
| 14 | 888 printf("\tmovl $%d,%%ecx\n",length/4); |
| 39 | 889 fix = (length/4)*4; |
| 13 | 890 printf("\tcld\n\trep\n\tmovsl\n"); |
| 14 | 891 if(length%4) { |
| 47 | 892 emit_copy(from,to,length,offset+length/4,0); |
| 14 | 893 } |
| 13 | 894 } |
| 47 | 895 if (value) { |
| 39 | 896 /* this code is necessary for the value of assignment or function call */ |
| 897 /* otherwise we don't need this */ | |
| 47 | 898 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); |
| 899 if(creg!=to) { | |
| 900 if (to==dreg) | |
| 901 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 902 else { | |
| 903 free_register(creg); creg=to; | |
| 904 } | |
| 45 | 905 } |
| 39 | 906 } |
| 41 | 907 regv[from]=regv[to]=regv[dreg]=0; |
| 42 | 908 regv[creg]=1; |
| 13 | 909 } |
| 910 | |
| 911 int | |
| 912 struct_push(int e4,int t) | |
| 913 { | |
| 42 | 914 int length,xreg,save,lreg; |
| 13 | 915 g_expr(e4); |
| 14 | 916 length=size(t); |
| 917 if(length%size_of_int) { | |
| 918 length += size_of_int - (length%size_of_int); | |
| 13 | 919 } |
| 40 | 920 if (length==4) { |
| 921 printf("\tpushl (%s)\n",register_name(creg,0)); return 1; | |
| 922 } | |
| 923 if (length==8) { | |
| 924 printf("\tpushl 4(%s)\n",register_name(creg,0)); | |
| 925 printf("\tpushl (%s)\n",register_name(creg,0)); return 2; | |
| 926 } | |
| 38 | 927 /* I think, after g_expr, at least two registers are free */ |
| 14 | 928 printf("\tsubl $%d,%%esp\n",length); |
| 38 | 929 if (register_full()) { |
| 930 /* this is wrong assumption */ | |
| 931 save = 1; | |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
932 for(lreg=0;lreg==creg||lreg==dreg;lreg++); |
| 38 | 933 printf("\tpushl %s\n",register_name(lreg,0)); |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
934 xreg = lreg; regv[xreg]=0; |
| 38 | 935 } else { |
| 936 save=0; | |
| 937 xreg = get_register(); | |
| 13 | 938 } |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
939 if (save) |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
940 printf("\tlea %d(%%esp),%s\n",size_of_int,register_name(xreg,0)); |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
941 else |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
942 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); |
| 41 | 943 regv[xreg]=1; |
| 47 | 944 emit_copy(creg,xreg,length,0,0); |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
945 /* we have value in creg, it may be changed */ |
| 38 | 946 if (save) { |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
947 if(creg==xreg) { |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
948 creg = get_register(); /* creg is freed in emit_copy */ |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
949 } |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
950 printf("\tpopl %s\n",register_name(xreg,0)); |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
951 regv[xreg]=1; |
| 38 | 952 } else |
| 953 free_register(xreg); | |
| 14 | 954 return length/size_of_int; |
| 13 | 955 } |
| 956 | |
| 0 | 957 void |
| 958 function(int e1) | |
| 959 { | |
| 13 | 960 int e2,e3,e4,e5,nargs,t; |
| 0 | 961 NMTBL *n; |
| 23 | 962 int save,saved; |
| 963 if (free_register_count()<1) { | |
| 964 for(save = 0;save==dreg||save==creg;save++); | |
| 965 printf("\tpushl %s\n",register_name(save,0)); | |
| 966 saved = 1; | |
| 967 } else { | |
| 968 save = get_register(); | |
| 969 saved = 0; | |
| 970 } | |
| 41 | 971 regv[save]=0; |
| 0 | 972 e2 = cadr(e1); |
| 973 nargs = 0; | |
| 974 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 13 | 975 t=caddr(e3); |
| 0 | 976 n=(NMTBL *)(e5=(cadr(e4 = car(e3)))); |
| 977 switch(car(e4)) { | |
| 50 | 978 /* |
| 0 | 979 case FNAME: |
| 18 | 980 printf("\tlea %s,%s\n",n->nm,register_name(creg,0)); |
| 981 printf("\tpushl %s\n",register_name(creg,0)); | |
| 0 | 982 break; |
| 983 case ADDRESS: | |
| 984 g_expr(e5); | |
| 18 | 985 printf("\tpushl %s\n",register_name(creg,0)); |
| 0 | 986 break; |
| 50 | 987 */ |
| 13 | 988 default: |
| 989 if(scalar(t)) { | |
| 990 g_expr(e4); | |
| 18 | 991 printf("\tpushl %s\n",register_name(creg,0)); |
| 13 | 992 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 993 nargs += struct_push(e4,t); | |
| 994 continue; | |
| 995 } else { | |
| 996 error(TYERR); | |
| 997 } | |
| 0 | 998 } |
| 999 ++nargs; | |
| 1000 } | |
| 1001 if (car(e2) == FNAME) { | |
| 1002 n=(NMTBL *)cadr(e2); | |
| 23 | 1003 } else { |
| 44 | 1004 use_register(creg,REG_EAX,0); |
| 23 | 1005 g_expr(e2); |
| 1006 } | |
| 1007 | |
| 26 | 1008 /* we don't have to save creg nor dreg */ |
| 41 | 1009 regs[creg]=0; regs[dreg]=0; |
| 1010 regv[creg]= regv[dreg]= regv[save]= 0; | |
| 23 | 1011 use_register(creg,REG_EAX,0); |
| 1012 use_register(dreg,REG_EDX,0); /* will be destroyed */ | |
| 1013 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 41 | 1014 regs[creg]=1; regs[dreg]=1; |
| 23 | 1015 |
| 1016 if (car(e2) == FNAME) { | |
| 0 | 1017 printf("\tcall\t%s\n",n->nm); |
| 23 | 1018 } else { |
| 18 | 1019 printf("\tcall\t*%s\n",register_name(creg,0)); |
| 0 | 1020 } |
| 6 | 1021 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); |
| 23 | 1022 if (saved) { |
| 1023 printf("\tpopl %s\n",register_name(save,0)); | |
| 1024 } else { | |
| 1025 free_register(save); | |
| 1026 } | |
| 41 | 1027 regv[save]=0; |
| 1028 regv[creg]=1; | |
| 0 | 1029 } |
| 1030 | |
| 51 | 1031 /* goto arguments list */ |
| 52 | 1032 /* target list4(list2(tag,disp),cdr,ty,source_expr) */ |
| 51 | 1033 /* source expr=listn(tag,...) */ |
| 1034 /* source (after) list2(tag,disp) */ | |
| 52 | 1035 /* source list list3(e,cdr,sz) */ |
| 48 | 1036 |
| 1037 int | |
| 52 | 1038 overrap(int t,int sz,int source) |
| 48 | 1039 { |
| 52 | 1040 int s,s0,s1; |
| 1041 int t0=cadr(t); | |
| 1042 int t1=t0+sz; | |
| 48 | 1043 for(;source;source=cadr(source)) { |
| 52 | 1044 s=car(source); s0=cadr(s); |
| 1045 if(car(s)==REGISTER && car(t)==REGISTER) { | |
| 48 | 1046 if(s0==t0) return 1; |
| 52 | 1047 } else if (is_same_type(s,t)) { |
| 1048 s1=s0+caddr(source); | |
| 1049 #if 0 | |
| 51 | 1050 printf("# ovedrrap source %d t0 %d t1 %d\n",car(car(t)),t0,t1); |
| 1051 printf("# ovedrrap target %d s0 %d s1 %d\n",car(car(source)),s0,s1); | |
| 1052 printf("# ovedrrap equal = %d\n",((t0<=s0&&s0<=t1)||(t0<=s1&&s1<=t1))); | |
| 52 | 1053 #endif |
| 48 | 1054 if((t0<=s0&&s0<=t1)||(t0<=s1&&s1<=t1)) return 1; |
| 1055 } | |
| 1056 } | |
| 1057 return 0; | |
| 1058 } | |
| 1059 | |
| 51 | 1060 void |
| 1061 parallel_assign_post(int e1) { | |
| 1062 int ce1; | |
| 1063 while(e1) { | |
| 1064 ce1=car(e1); | |
| 1065 if (ce1) { | |
| 1066 if(car(ce1)) | |
| 1067 g_expr(car(ce1)); | |
| 52 | 1068 #if 1 |
| 1069 printf("# post process ty %d+%d\n",cadr(car(ce1)),caddr(car(ce1))); | |
| 1070 #endif | |
| 51 | 1071 if(cadr(ce1)>=0) { |
| 1072 free_register(cadr(ce1)); | |
| 1073 } | |
| 1074 } | |
| 1075 e1=cadr(e1); | |
| 1076 } | |
| 1077 } | |
| 1078 | |
| 48 | 1079 int |
| 51 | 1080 parallel_assign(int *target,int *source,int *processing) |
| 48 | 1081 { |
| 49 | 1082 int t,s,e1,p,sz,ty; |
| 48 | 1083 while(*target) { |
| 51 | 1084 t=car(*target); s=cadddr(*target); |
| 49 | 1085 sz=size(ty=caddr(*target)); |
| 52 | 1086 if(car(t)==car(s) && cadr(t)==cadr(s)) { |
| 1087 #if 1 | |
| 1088 printf("# duplicate same target check (you shouldn't see this) \n# %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); | |
| 1089 #endif | |
| 1090 /*½ñ¤¹þ¤ßÀ褬¼«Ê¬¼«¿È*/ | |
| 1091 remove0(target,t); | |
| 1092 /* Ç˲õ¤µ¤ì¤Æ¤Ïº¤¤ë¤Î¤Ç¡¢source list¤«¤é¤Ï½ü¤«¤Ê¤¤ */ | |
| 1093 continue; | |
| 1094 } | |
| 48 | 1095 for(p=*processing;p;p=cadr(p)) { |
| 1096 if(car(p)==t) { /*¥¿¡¼¥²¥Ã¥È¤¬½èÍý¥ê¥¹¥ÈÃæ¤Ë¤¢¤ë*/ | |
| 51 | 1097 |
| 1098 /* ¤É¤±¤Æ¤·¤Þ¤¨¤Ð¡¢¤â¤¦´Ø·¸¤Ê¤¤¡£ÆóÅ٤ȽèÍý¤¹¤ëɬÍפâ¤Ê¤¤¡£*/ | |
| 49 | 1099 remove0(target,t); remove0(source,s); remove0(processing,p); |
| 52 | 1100 #if 1 |
| 1101 printf("# circular dependcy %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); | |
| 1102 #endif | |
| 48 | 1103 /*¿·¤·¤¤¥ì¥¸¥¹¥¿(or ¥¹¥¿¥Ã¥¯)¤ò¼èÆÀ¤¹¤ë*/ |
| 49 | 1104 if (sz==size_of_int && (e1=get_register())!=-1) { |
| 48 | 1105 e1=list2(REGISTER,e1); |
| 49 | 1106 g_expr(assign_expr0(e1,s,ty,ty)); |
| 1107 return list2(assign_expr0(t,e1,ty,ty),e1); | |
| 48 | 1108 } else { |
| 50 | 1109 disp-=sz; |
| 53 | 1110 g_expr(assign_expr0((e1=list2(LVAR,disp)),s,ty,ty)); |
| 49 | 1111 return list2(assign_expr0(t,e1,ty,ty),-1); |
| 48 | 1112 } |
| 1113 } | |
| 1114 } | |
| 52 | 1115 if (overrap(t,sz,*source)) { |
| 51 | 1116 remove0(target,t); |
| 49 | 1117 *processing=list2(t,*processing); |
| 51 | 1118 e1=0; |
| 52 | 1119 do { |
| 51 | 1120 /*½ñ¤¹þ¤ßÀ褬¥½¡¼¥¹¤È½Å¤Ê¤Ã¤Æ¤¤¤ë¤¢¤¤¤À*/ |
| 52 | 1121 /*¾¤Î¤òÀè¤Ë½èÍý¤¹¤ë*/ |
| 1122 #if 1 | |
| 1123 printf("# recursive%d %d ty %d+%d sz %d\n",e1,car(t),ty,cadr(t),sz); | |
| 1124 #endif | |
| 51 | 1125 e1=list2(parallel_assign(target,source,processing),e1); |
| 52 | 1126 } while (overrap(t,sz,*source)); |
| 1127 /* ¤³¤ì¤Ç¶õ¤¤¤¿ */ | |
| 1128 #if 1 | |
| 1129 printf("# recursive%d done %d ty %d+%d sz %d\n",e1,car(t),ty,cadr(t),sz); | |
| 1130 #endif | |
| 1131 g_expr(assign_expr0(t,s,ty,ty)); | |
| 51 | 1132 remove0(source,s); |
| 1133 remove0(processing,t); | |
| 48 | 1134 /* ²£¤Ë¤è¤±¤¿¤â¤Î¤¬¤¢¤ì¤Ð¡¢¸å»ÏËö¤ò¤¹¤ë*/ |
| 51 | 1135 parallel_assign_post(e1); |
| 48 | 1136 } else { |
| 52 | 1137 /* ½Å¤Ê¤Ã¤Æ¤Ê¤¤¤Î¤Ç°Â¿´¤·¤Æ½ñ¤¹þ¤á¤ë */ |
| 1138 #if 1 | |
| 1139 printf("# normal assign %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); | |
| 1140 #endif | |
| 49 | 1141 g_expr(assign_expr0(t,s,ty,ty)); |
| 1142 remove0(target,t); remove0(source,s); | |
| 48 | 1143 } |
| 1144 } | |
| 1145 return 0; | |
| 1146 } | |
| 1147 | |
| 49 | 1148 void |
| 1149 remove0(int *parent,int e) | |
| 48 | 1150 { |
| 1151 int list; | |
| 49 | 1152 while ((list=*parent)) { |
| 48 | 1153 if (car(list)==e) { |
| 51 | 1154 *parent= cadr(list); return; |
| 1155 } else { | |
| 1156 parent=&cadr(list); | |
| 1157 } | |
| 1158 } | |
| 1159 } | |
| 1160 | |
| 1161 void | |
| 1162 remove0_all(int *parent,int e) | |
| 1163 { | |
| 1164 int list; | |
| 1165 while ((list=*parent)) { | |
| 1166 if (car(list)==e) { | |
| 48 | 1167 *parent= cadr(list); |
| 1168 } else { | |
| 1169 parent=&cadr(list); | |
| 1170 } | |
| 1171 } | |
| 1172 } | |
| 1173 | |
| 49 | 1174 int |
| 1175 is_simple(int e1) | |
| 1176 { | |
| 1177 return ( | |
| 1178 e1==CONST || e1==FNAME || e1==LVAR || e1==REGISTER || | |
| 50 | 1179 e1==GVAR || RGVAR || RLVAR || CRLVAR || CRGVAR |
| 49 | 1180 ); |
| 1181 } | |
| 1182 | |
| 1183 int | |
| 51 | 1184 is_same_type(int e1,int e2) |
| 49 | 1185 { |
| 51 | 1186 int ce1=car(e1); |
| 1187 int ce2=car(e2); | |
| 1188 return ( | |
| 1189 (ce1==LVAR && (ce2==RLVAR||ce2==CRLVAR)) | |
| 1190 || (ce2==LVAR && (ce1==RLVAR||ce1==CRLVAR)) | |
| 1191 || (ce1==GVAR && (ce2==RGVAR||ce2==CRGVAR)) | |
| 1192 || (ce2==GVAR && (ce1==RGVAR||ce1==CRGVAR)) | |
| 1193 ); | |
| 49 | 1194 } |
| 1195 | |
| 52 | 1196 int |
| 1197 is_memory(int e1) | |
| 1198 { | |
| 1199 int ce1=car(e1); | |
| 1200 return ( | |
| 1201 ce1==LVAR ||ce1==RLVAR||ce1==CRLVAR || | |
| 1202 ce1==GVAR ||ce1==RGVAR||ce1==CRGVAR || | |
| 1203 ce1==REGISTER | |
| 1204 ); | |
| 1205 } | |
| 1206 | |
| 48 | 1207 void |
| 1208 jump(int e1, int env) | |
| 1209 { | |
| 51 | 1210 int e2,e3,e4,sz,arg_size,ty,max_regs,regs; |
| 1211 int t0,s0; | |
| 48 | 1212 NMTBL *code0; |
| 1213 int target = 0; | |
| 1214 int source = 0; | |
| 1215 int processing = 0; | |
| 1216 | |
| 1217 /* ¤Þ¤º¡¢¥µ¥¤¥º¤ò·×»»¤·¤Ê¤¬¤é¡¢·è¤Þ¤Ã¤¿·Á¤ËÍ¡£ */ | |
| 51 | 1218 |
| 50 | 1219 arg_size = 0; regs = 0; max_regs = MAX_REGISTER_VAR-1; |
| 1220 for (e3 = reverse0(caddr(e1)); e3; e3 = cadr(e3)) { | |
| 49 | 1221 e2 = car(e3); sz = size(ty=caddr(e3)); |
| 53 | 1222 if (regs <= max_regs&&scalar(ty)) { |
| 51 | 1223 target=list4(list2(REGISTER,virtual((regs++)+REG_ESI)), |
| 1224 target,ty,e2); | |
| 48 | 1225 } else { |
| 53 | 1226 target=list4(list2(LVAR,0), |
| 51 | 1227 target,ty,e2); |
| 49 | 1228 arg_size += sz; |
| 48 | 1229 } |
| 52 | 1230 #if 1 |
| 1231 printf("# target %d ty %d+%d sz %d\n",car(car(target)),ty,cadr(car(target)),sz); | |
| 1232 #endif | |
| 48 | 1233 } |
| 1234 | |
| 1235 /* disp ¤òÈô¤ÓÀè»÷¹ç¤ï¤»¤Æ½¤Àµ */ | |
| 50 | 1236 if (fnptr->sc==CODE) { |
| 1237 if (-arg_size<disp) disp = -arg_size; | |
| 53 | 1238 jump_offset = 0; |
| 50 | 1239 } else { |
| 1240 if (disp_offset-arg_size<disp) disp = disp_offset-arg_size; | |
| 53 | 1241 jump_offset = 0; |
| 50 | 1242 } |
| 48 | 1243 |
| 1244 /* Ê£»¨¤Ê¼°¤òÁ°¤â¤Ã¤Æ·×»»¤·¤Æ¤ª¤¯ */ | |
| 1245 /* ɬÍפʤé¶É½êÊÑ¿ô¤òÍѤ¤¤ë¡£ */ | |
| 1246 /* ¶É½êÊÑ¿ô¤Ø¤Î¥ª¥Õ¥»¥Ã¥È¤ò³Ð¤¨¤Æ¤ª¤¯ */ | |
| 1247 | |
| 51 | 1248 for (e2 = target; e2; e2 = cadr(e2)) { |
| 1249 t0=car(e2); s0=cadddr(e2); | |
| 52 | 1250 sz=size(ty=caddr(e2)); |
| 53 | 1251 if(car(t0)==LVAR) { |
| 1252 /* ¤³¤³¤Ç¡¢½ñ¹þÀ襢¥É¥ì¥¹¤ò·è¤á¤ë */ | |
| 1253 cadr(t0)=-arg_size+jump_offset; | |
| 1254 arg_size-=sz; | |
| 1255 } | |
| 51 | 1256 if (!is_simple(car(s0))) { |
| 52 | 1257 disp-=sz; |
| 53 | 1258 g_expr(assign_expr0((e4=list2(LVAR,disp)),s0,ty,ty)); |
| 51 | 1259 cadddr(e2)=e4; |
| 1260 s0=e4; | |
| 52 | 1261 } else if (is_same_type(t0,s0)) { |
| 1262 if(cadr(t0)==cadr(s0)) { | |
| 1263 /* we should check size also (but currently useless */ | |
| 1264 remove0(&target,t0); | |
| 1265 /* still we have source to avoid overwrite */ | |
| 51 | 1266 } |
| 52 | 1267 } |
| 1268 if(is_memory(s0)) { | |
| 1269 source=list3(s0,source,sz); | |
| 1270 #if 1 | |
| 1271 printf("# source %d ty %d+%d sz %d\n",car(car(source)),ty,cadr(car(source)),sz); | |
| 51 | 1272 #endif |
| 48 | 1273 } |
| 1274 } | |
| 1275 | |
| 1276 /* compute jump address */ | |
| 1277 e2 = cadr(e1); | |
| 1278 if (car(e2) == FNAME) { | |
| 1279 code0=(NMTBL *)cadr(e2); | |
| 1280 if (code0->sc!=CODE) { | |
| 1281 error(TYERR); return; | |
| 1282 } | |
| 1283 } else { /* indirect */ | |
| 1284 g_expr(e2); | |
| 1285 emit_push(); | |
| 1286 } | |
| 50 | 1287 if (env) { |
| 1288 g_expr(env); | |
| 1289 emit_push(); | |
| 1290 } | |
| 48 | 1291 |
| 1292 /* ÊÂÎóÂåÆþ¤ò¼Â¹Ô */ | |
| 1293 | |
| 51 | 1294 e1=parallel_assign(&target,&source,&processing); |
| 1295 | |
| 1296 /* ¸å»ÏËö¤¬»Ä¤Ã¤Æ¤¤¤¿ */ | |
| 1297 parallel_assign_post(e1); | |
| 48 | 1298 |
| 50 | 1299 if (env) { |
| 1300 /* change the frame pointer */ | |
| 1301 e3 = emit_pop(0); | |
| 1302 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1303 emit_pop_free(e3); | |
| 1304 } else if (fnptr->sc==FUNCTION) { | |
| 1305 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); | |
| 1306 } | |
| 1307 | |
| 48 | 1308 /* shrink stack if necessary */ |
| 50 | 1309 /* |
| 1310 if (!env && -arg_size<disp) { | |
| 1311 printf("\tleal %d(%%ebp),%%esp\n",-arg_size); | |
| 1312 } Why we need this? | |
| 1313 */ | |
| 1314 | |
| 48 | 1315 if (car(e2) == FNAME) { |
| 1316 printf("\tjmp %s\n",code0->nm); | |
| 1317 } else { | |
| 1318 e2 = emit_pop(0); | |
| 1319 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1320 emit_pop_free(e2); | |
| 1321 } | |
| 1322 } | |
| 1323 | |
| 1324 #if 0 | |
| 2 | 1325 int |
| 3 | 1326 arg_size(int e3,int *nargs0) |
| 2 | 1327 { |
| 1328 int i,nargs,offset_list,e,t; | |
| 1329 | |
| 1330 offset_list = 0; | |
| 1331 /* we should use prototypes's type */ | |
| 1332 for (i = nargs = 0; e3;e3 =cadr(e3)) { | |
| 1333 e = car(e3); t = caddr(e3); | |
| 3 | 1334 if (i < MAX_REGISTER_VAR && scalar(t)) { |
| 5 | 1335 offset_list = list3(-(REG_ESI+i++),offset_list,e); |
| 2 | 1336 } else { |
| 1337 offset_list = | |
| 5 | 1338 list3(nargs,offset_list,e); |
| 3 | 1339 nargs += (car(e3)==CHAR?size_of_int:size(t)); |
| 2 | 1340 } |
| 1341 } | |
| 3 | 1342 *nargs0 = -nargs; |
| 2 | 1343 return offset_list; |
| 1344 } | |
| 1345 | |
| 18 | 1346 |
| 1347 void | |
| 0 | 1348 jump(int e1, int env) |
| 1349 { | |
| 18 | 1350 int i,args,e2,e3,e4,e5,nargs,regs; |
| 0 | 1351 NMTBL *n,*code0; |
| 42 | 1352 int new_disp,scode,disp1,xreg; |
| 0 | 1353 char *xrn; |
| 1354 | |
| 2 | 1355 /* We need three passes. Compute Stack size, Compute Arg, Copy it. */ |
| 0 | 1356 /* count number of args */ |
| 2 | 1357 args = caddr(e1); |
| 3 | 1358 args = reverse0(args); |
| 1359 nargs = arg_size(args,&new_disp); /* compute in normal order */ | |
| 5 | 1360 disp1 = (fnptr->sc==CODE)?0:-size_of_int; |
| 1361 if (new_disp+disp1 < disp) { /* have to extend stack */ | |
| 6 | 1362 if (fnptr->sc==CODE) |
| 1363 printf("\tleal %d(%%ebp),%%esp\n",new_disp-size_of_int); | |
| 1364 else | |
| 1365 printf("\tleal %d(%%ebp),%%esp\n",new_disp+disp_offset); | |
| 0 | 1366 } |
| 1367 /* compute jump address */ | |
| 1368 e2 = cadr(e1); | |
| 1369 if (car(e2) == FNAME) { | |
| 1370 code0=(NMTBL *)cadr(e2); | |
| 1371 if (code0->sc!=CODE) { | |
| 1372 error(STERR); return; | |
| 1373 } | |
| 1374 } else { /* indirect */ | |
| 1375 g_expr(e2); | |
| 1376 emit_push(); | |
| 1377 } | |
| 2 | 1378 /* compute arguments in reverse order */ |
| 21 | 1379 /* printf("## jump code_arg_offset=%d code_disp_offset=%d\n",code_arg_offset,code_disp_offset); */ |
| 2 | 1380 regs = 0; |
| 4 | 1381 i=MAX_REGISTER_VAR; |
| 2 | 1382 for (e3=nargs; e3;e3 =cadr(e3)) { |
| 1383 n=(NMTBL *)(e5=(cadr(e4 = caddr(e3)))); | |
| 0 | 1384 switch(car(e4)) { |
| 1385 case FNAME: | |
| 18 | 1386 printf("\tlea %s,%s\n",n->nm,register_name(creg,0)); |
| 0 | 1387 emit_push(); |
| 1388 break; | |
| 1389 case ADDRESS: | |
| 1390 g_expr(e5); | |
| 1391 emit_push(); | |
| 1392 break; | |
| 1393 case RLVAR: | |
| 1394 case CRLVAR: | |
| 4 | 1395 if (env==0 && fnptr->sc==CODE) { |
| 21 | 1396 /* printf("## e5=%d car(e3)=%d\n",e5,car(e3)); */ |
| 5 | 1397 if (e5>=0 && e5==car(e3)) { |
| 2 | 1398 /* The same positioned local variable. No need to copy */ |
| 1399 reg_stack[reg_sp++] = -2; | |
| 1400 } | |
| 4 | 1401 break; |
| 0 | 1402 } |
| 3 | 1403 g_expr(e4); |
| 1404 emit_push(); | |
| 1405 break; | |
| 0 | 1406 case REGISTER: |
| 21 | 1407 /* printf("## i=%d rname[e5]=%d\n",i,rname[e5]); */ |
| 4 | 1408 if (i>0 && rname[e5]==REG_ESI+ --i) { |
| 3 | 1409 /* The same register variable. No need to copy */ |
| 2 | 1410 reg_stack[reg_sp++] = e5; |
| 4 | 1411 break; |
| 0 | 1412 } |
| 1413 default: | |
| 1414 g_expr(e4); | |
| 1415 emit_push(); | |
| 1416 } | |
| 2 | 1417 regs++; |
| 0 | 1418 } |
| 1419 if (env) { | |
| 2 | 1420 /* change the frame pointer */ |
| 0 | 1421 g_expr(env); |
| 18 | 1422 printf("\tmovl %s,%%ebp\n",register_name(creg,0)); |
| 3 | 1423 } else if (fnptr->sc==FUNCTION) { |
| 1424 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); | |
| 1425 } | |
| 1426 /* force lvar offset mode to CODE */ | |
| 1427 scode = fnptr->sc; fnptr->sc = CODE; | |
| 21 | 1428 /* printf("## jump2 code_arg_offset=%d code_disp_offset=%d\n",code_arg_offset,code_disp_offset); */ |
| 0 | 1429 /* copy arguments to destination environment if necessary */ |
| 3 | 1430 nargs = reverse0(nargs); /* pop in normal order */ |
| 1431 i=0; | |
| 1432 for (e3=nargs; e3;e3 =cadr(e3)) { | |
| 5 | 1433 if ((e4=car(e3))<0) { |
| 2 | 1434 /* register case */ |
| 1435 if (reg_stack[--reg_sp]>=REG_ESI) { | |
| 1436 /* the same registger */ | |
| 1437 } else { | |
| 1438 if(reg_stack[reg_sp]<0) { | |
| 5 | 1439 printf("\tpopl %s\n",reg_name[rname[REG_ESI+i]]); /* e4? */ |
| 2 | 1440 } else { |
| 1441 printf("\tmovl %s,%s\n", | |
| 1442 reg_name[rname[reg_stack[reg_sp]]], | |
| 5 | 1443 reg_name[rname[REG_ESI+i]]); /* e4? */ |
| 2 | 1444 free_register(reg_stack[reg_sp]); |
| 1445 } | |
| 3 | 1446 i++; |
| 2 | 1447 } |
| 1448 } else { | |
| 1449 /* local variable case */ | |
| 0 | 1450 if (reg_stack[reg_sp-1]== -2) { |
| 1451 /* same positioned variable */ | |
| 1452 reg_sp--; | |
| 1453 } else { | |
| 42 | 1454 printf("\tmovl %s,%d(%%ebp)\n",register_name((xreg=emit_pop(0)),0), lvar(e4)); |
| 0 | 1455 } |
| 1456 } | |
| 1457 } | |
| 42 | 1458 free_register(xreg); |
| 0 | 1459 if (car(e2) != FNAME) { |
| 42 | 1460 xrn=register_name((xreg=emit_pop(0)),0); |
| 0 | 1461 } |
| 42 | 1462 free_register(xreg); |
| 6 | 1463 if (!env && new_disp+disp1>disp) { |
| 0 | 1464 /* shrink stack if necessary */ |
| 5 | 1465 printf("\tleal %d(%%ebp),%%esp\n",new_disp-size_of_int); |
| 0 | 1466 } |
| 1467 if (car(e2) == FNAME) { | |
| 1468 printf("\tjmp %s\n",code0->nm); | |
| 1469 } else { | |
| 1470 printf("\tjmp *%s\n",xrn); | |
| 1471 } | |
| 3 | 1472 fnptr->sc = scode; |
| 0 | 1473 } |
| 48 | 1474 #endif |
| 0 | 1475 |
| 1476 void | |
| 1477 machinop(int e1) | |
| 1478 { | |
| 1479 int e2,e3,op; | |
| 1480 | |
| 1481 e2 = cadr(e1); | |
| 1482 op = car(e1); | |
| 1483 e3 = caddr(e1); | |
| 1484 g_expr(e3); | |
| 1485 emit_push(); | |
| 1486 g_expr(e2); | |
| 43 | 1487 tosop(car(e1),(e2=pop_register())); |
| 1488 emit_pop_free(e2); | |
| 42 | 1489 regv[creg]=1; |
| 0 | 1490 return; |
| 1491 } | |
| 1492 | |
| 1493 | |
| 1494 void | |
| 1495 rindirect(int e1) /* *(p +5 ) */ | |
| 1496 | |
| 1497 { | |
| 1498 char *op; | |
| 1499 int e2,e3,byte; | |
| 1500 | |
| 1501 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); | |
| 1502 e3 = cadr(e2 = cadr(e1)); | |
| 1503 g_expr(e2); | |
| 21 | 1504 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 0 | 1505 } |
| 1506 | |
| 1507 void | |
| 1508 sassign(int e1) | |
| 1509 { | |
| 38 | 1510 int e2,e3,e4,sz,xreg; |
| 0 | 1511 |
| 18 | 1512 /* structure assignment */ |
| 37 | 1513 e2 = cadr(e1); /* pointer variable to the struct */ |
| 1514 e3 = cadr(e2); /* offset of the variable (distination) */ | |
| 39 | 1515 e4 = caddr(e1); /* right value (source) */ |
| 37 | 1516 sz = cadddr(e1); /* size of struct or union */ |
| 0 | 1517 g_expr(e4); |
| 1518 emit_push(); | |
| 1519 g_expr(e2); | |
| 38 | 1520 xreg = emit_pop(0); |
| 47 | 1521 emit_copy(xreg,creg,sz,0,1); |
| 42 | 1522 emit_pop_free(xreg); |
| 0 | 1523 return; |
| 1524 } | |
| 1525 | |
| 1526 void | |
| 1527 assign(int e1) | |
| 1528 { | |
| 1529 char *op; | |
| 1530 int e2,e3,e4,byte; | |
| 1531 | |
| 1532 op = ((byte=(car(e1) == CASS))? "movb" : "movl"); | |
| 1533 /* e2=e4 */ | |
| 1534 e2 = cadr(e1); | |
| 1535 e3 = cadr(e2); | |
| 1536 e4 = caddr(e1); | |
| 1537 switch(car(e2)) { | |
| 1538 case GVAR: /* i=3 */ | |
| 1539 g_expr(e4); | |
| 1540 if (byte) use_data_reg(creg,1); | |
| 18 | 1541 printf("\t%s %s,%s\n",op,register_name(creg,byte),(char *)caddr(e2)); |
| 0 | 1542 return; |
| 1543 case LVAR: | |
| 1544 g_expr(e4); | |
| 1545 if (byte) use_data_reg(creg,1); | |
| 18 | 1546 printf("\t%s %s,%d(%%ebp)\n",op,register_name(creg,byte),lvar(cadr(e2))); |
| 0 | 1547 return; |
| 1548 case REGISTER: | |
| 1549 g_expr(e4); | |
| 1550 if (creg!=cadr(e2)) | |
| 23 | 1551 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(cadr(e2),0)); |
| 0 | 1552 return; |
| 1553 } | |
| 23 | 1554 g_expr(e2); |
| 0 | 1555 emit_push(); |
| 23 | 1556 use_data_reg(creg,0); |
| 1557 g_expr(e4); | |
| 0 | 1558 if (byte) use_data_reg(creg,1); |
| 23 | 1559 e2 = emit_pop(0); |
| 1560 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(e2,0)); | |
| 42 | 1561 emit_pop_free(e2); |
| 1562 regv[creg]=1; | |
| 0 | 1563 return; |
| 1564 } | |
| 1565 | |
| 1566 void | |
| 1567 assop(int e1) | |
| 1568 { | |
| 43 | 1569 int e2,e3,byte,op,reg; |
| 0 | 1570 char *xrn; |
| 42 | 1571 int xreg,edx; |
| 0 | 1572 |
| 1573 /* e2 op= e3 */ | |
| 1574 byte = (car(e1) == CASSOP); | |
| 1575 e2 = cadr(e1); | |
| 1576 if (car(e2)==INDIRECT) e2=cadr(e2); | |
| 1577 e3 = caddr(e1); | |
| 1578 op = cadddr(e1); | |
| 1579 | |
| 1580 g_expr(e3); | |
| 1581 if (car(e2)==REGISTER) { | |
| 43 | 1582 xreg = creg; |
| 1583 creg = reg = cadr(e2); | |
| 1584 tosop(op,xreg); | |
| 1585 creg = xreg; | |
| 1586 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 42 | 1587 regv[creg]=1; |
| 0 | 1588 return; |
| 1589 } | |
| 43 | 1590 emit_push(); |
| 0 | 1591 g_expr(e2); |
| 42 | 1592 edx = edx_setup(); |
| 18 | 1593 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ |
| 42 | 1594 regv[xreg]=regs[xreg]=1; |
| 1595 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1596 regv[edx]=1; | |
| 1597 ld_indexx(byte,0,edx); | |
| 43 | 1598 tosop(op,xreg); |
| 42 | 1599 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); |
| 1600 edx_cleanup(); | |
| 1601 emit_pop_free(xreg); | |
| 1602 regv[creg]=1; | |
| 0 | 1603 return; |
| 1604 } | |
| 1605 | |
| 1606 | |
| 1607 void | |
| 43 | 1608 tosop(int op,int oreg) |
| 0 | 1609 { |
| 43 | 1610 int dx; |
| 18 | 1611 char *orn,*crn; |
| 0 | 1612 |
| 1613 switch(op) { | |
| 1614 case LSHIFT: | |
| 1615 case ULSHIFT: | |
| 1616 shift("sall",oreg); | |
| 1617 return; | |
| 1618 case RSHIFT: | |
| 1619 shift("sarl",oreg); | |
| 1620 return; | |
| 1621 case URSHIFT: | |
| 1622 shift("shrl",oreg); | |
| 1623 return; | |
| 1624 } | |
| 1625 if(oreg==-1) { | |
| 18 | 1626 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 1627 oreg = dreg; |
| 42 | 1628 regv[dreg]=1; |
| 0 | 1629 } |
| 42 | 1630 regv[oreg]=1; regs[oreg]=1; |
| 18 | 1631 orn = register_name(oreg,0); |
| 1632 crn = register_name(creg,0); | |
| 0 | 1633 switch(op) { |
| 1634 case ADD: | |
| 1635 printf("\taddl %s,%s\n",orn,crn); | |
| 41 | 1636 break; |
| 0 | 1637 case SUB: |
| 1638 printf("\tsubl %s,%s\n",orn,crn); | |
| 41 | 1639 break; |
| 0 | 1640 case BAND: |
| 1641 printf("\tandl %s,%s\n",orn,crn); | |
| 41 | 1642 break; |
| 0 | 1643 case EOR: |
| 1644 printf("\txorl %s,%s\n",orn,crn); | |
| 41 | 1645 break; |
| 0 | 1646 case BOR: |
| 1647 printf("\torl %s,%s\n",orn,crn); | |
| 41 | 1648 break; |
| 0 | 1649 case MUL: |
| 1650 case UMUL: | |
| 1651 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 41 | 1652 break; |
| 0 | 1653 case DIV: |
| 1654 case UDIV: | |
| 42 | 1655 use_register(creg,REG_EAX,1); |
| 1656 edx_setup(); | |
| 1657 orn = register_name(oreg,0); | |
| 0 | 1658 if (op==DIV) |
| 1659 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1660 else | |
| 1661 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1662 edx_cleanup(); |
| 41 | 1663 break; |
| 0 | 1664 case MOD: |
| 1665 case UMOD: | |
| 42 | 1666 use_register(creg,REG_EAX,1); |
| 1667 edx_setup(); | |
| 1668 orn = register_name(oreg,0); | |
| 0 | 1669 if (op==DIV) |
| 1670 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1671 else | |
| 1672 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1673 dx = virtual(REG_EDX); |
| 1674 if (dx!=creg) { | |
| 1675 rname[dx]=rname[creg]; | |
| 1676 rname[creg]=REG_EDX; | |
| 1677 } | |
| 1678 edx_cleanup(); | |
| 41 | 1679 break; |
| 0 | 1680 } |
| 42 | 1681 if (oreg!=dreg&&oreg>=0) |
| 1682 free_register(oreg); | |
| 0 | 1683 } |
| 1684 | |
| 42 | 1685 static int edx_stack=0; |
| 0 | 1686 |
| 42 | 1687 int |
| 1688 edx_setup() | |
| 0 | 1689 { |
| 42 | 1690 int edx_save; |
| 1691 /* make real EDX register empty */ | |
| 1692 if (free_register_count()<1) { | |
| 1693 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); | |
| 1694 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1695 edx_stack = list3(edx_save,edx_stack,0); | |
| 1696 } else { | |
| 1697 edx_save = get_register(); | |
| 1698 edx_stack = list3(edx_save,edx_stack,1); | |
| 0 | 1699 } |
| 42 | 1700 regv[edx_save]=0; |
| 1701 use_register(edx_save,REG_EDX,0); | |
| 1702 return edx_save; | |
| 0 | 1703 } |
| 1704 | |
| 18 | 1705 |
| 1706 void | |
| 42 | 1707 edx_cleanup() |
| 0 | 1708 { |
| 42 | 1709 if (caddr(edx_stack)==0) { |
| 1710 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1711 } else | |
| 1712 free_register(car(edx_stack)); | |
| 1713 edx_stack = cadr(edx_stack); | |
| 0 | 1714 } |
| 1715 | |
| 1716 void | |
| 1717 shift(char *op, int reg) | |
| 1718 { | |
| 1719 if (reg>=0) { | |
| 42 | 1720 use_register(reg,REG_ECX,1); |
| 0 | 1721 } else { |
| 1722 use_register(dreg,REG_ECX,0); | |
| 1723 printf("\tpopl %%ecx\n"); | |
| 1724 } | |
| 18 | 1725 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); |
| 0 | 1726 } |
| 1727 | |
| 1728 void | |
| 18 | 1729 ld_indexx(int byte, int n, int xreg) |
| 0 | 1730 { |
| 1731 char *op; | |
| 1732 | |
| 1733 op = byte ? "movsbl" : "movl"; | |
| 1734 if (n) | |
| 18 | 1735 printf("\t%s %d(%s),%s\n",op,n,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1736 else |
| 18 | 1737 printf("\t%s (%s),%s\n",op,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1738 } |
| 1739 | |
| 18 | 1740 /* |
| 0 | 1741 void |
| 18 | 1742 st_indexx(int byte, int n, int xreg) |
| 0 | 1743 { |
| 1744 char *op; | |
| 1745 | |
| 1746 op = byte ? "movb" : "movl"; | |
| 1747 if (n) | |
| 18 | 1748 printf("\t%s %s,%d(%s)\n",op,register_name(creg,byte),n,register_name(xreg,0)); |
| 0 | 1749 else |
| 18 | 1750 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(xreg,0)); |
| 0 | 1751 } |
| 1752 | |
| 1753 void | |
| 1754 indexy(char *op, char *gvar) | |
| 1755 { | |
| 18 | 1756 printf("\t%s %s,%s\n",op,register_name(creg,0),gvar); |
| 0 | 1757 } |
| 18 | 1758 */ |
| 0 | 1759 |
| 1760 void | |
| 1761 cmpdimm(int e, int csreg) | |
| 1762 { | |
| 1763 /* used in dosiwtch() */ | |
| 1764 use_register(creg,csreg,0); | |
| 18 | 1765 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 0 | 1766 } |
| 1767 | |
| 1768 void | |
| 1769 opening(char *filename) | |
| 1770 { | |
| 1771 printf("\t.file \"%s\"\n",filename); | |
| 1772 printf("\t.version\t\"01.01\"\n"); | |
| 1773 printf("gcc2_compiled.:\n"); | |
| 1774 printf(".text\n"); | |
| 1775 emit_init(); | |
| 1776 } | |
| 1777 | |
| 1778 void | |
| 1779 closing(void) | |
| 1780 { | |
| 1781 global_table(); | |
| 1782 printf("\t.ident \"Micro-C compiled\"\n"); | |
| 1783 } | |
| 1784 | |
| 1785 void | |
| 1786 rexpr(int e1, int l1, char *s) | |
| 1787 { | |
| 1788 g_expr(list3(SUB,cadr(e1),caddr(e1))); | |
| 1789 printf("\tj%s\t_%d\n",s,l1); | |
| 1790 } | |
| 1791 | |
| 1792 void | |
| 1793 jcond(int l, char cond) | |
| 1794 { | |
| 1795 printf("\tj%s\t_%d\n",cond?"ne":"e",l); | |
| 1796 } | |
| 1797 | |
| 1798 void | |
| 1799 jmp(int l) | |
| 1800 { | |
| 1801 control=0; | |
| 1802 printf("\tjmp\t_%d\n",l); | |
| 1803 /* align? */ | |
| 42 | 1804 /* |
| 1805 this is not allowed because of ? operator | |
| 1806 regv[creg]=regv[dreg]=0; | |
| 1807 use_register(creg,REG_EAX,0); | |
| 1808 use_register(dreg,REG_EBX,0); | |
| 1809 */ | |
| 0 | 1810 } |
| 1811 | |
| 1812 int | |
| 1813 fwdlabel(void) | |
| 1814 { | |
| 1815 return labelno++; | |
| 1816 } | |
| 1817 | |
| 1818 void | |
| 1819 fwddef(int l) | |
| 1820 { | |
| 1821 control=1; | |
| 1822 printf("_%d:\n",l); | |
| 1823 } | |
| 1824 | |
| 1825 int | |
| 1826 backdef(void) | |
| 1827 { | |
| 1828 control=1; | |
| 1829 printf("_%d:\n",labelno); | |
| 1830 return labelno++; | |
| 1831 } | |
| 1832 | |
| 1833 void | |
| 1834 def_label(int cslabel, int dlabel) | |
| 1835 { | |
| 1836 int fl; | |
| 1837 | |
| 1838 fl = 0; | |
| 1839 if (control) { | |
| 1840 jmp(fl=fwdlabel()); | |
| 1841 } | |
| 1842 fwddef(cslabel); | |
| 1843 if (dlabel) | |
| 1844 jmp(dlabel); | |
| 1845 if (fl) { | |
| 1846 fwddef(fl); | |
| 1847 } | |
| 1848 } | |
| 1849 | |
| 1850 void | |
| 1851 gen_comment(char *s) | |
| 1852 { | |
| 21 | 1853 printf("## %s",s); |
| 0 | 1854 } |
| 1855 | |
| 1856 void | |
| 1857 gen_source(char *s) | |
| 1858 { | |
| 1859 printf("%s",s); | |
| 1860 } | |
| 1861 | |
| 1862 void | |
| 1863 code_enter(char *name) | |
| 1864 { | |
| 1865 printf("\t.align 4\n"); | |
| 1866 if (stmode!=STATIC) | |
| 1867 printf(".globl %s\n",name); | |
| 1868 printf("\t.type\t%s,@function\n",name); | |
| 1869 printf("%s:\n",name); | |
| 42 | 1870 free_all_register(); |
| 0 | 1871 } |
| 1872 | |
| 1873 void | |
| 50 | 1874 code_enter1(int args) |
| 0 | 1875 { |
| 36 | 1876 code_disp_label=fwdlabel(); |
| 50 | 1877 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); |
| 53 | 1878 |
| 21 | 1879 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); |
| 0 | 1880 } |
| 1881 | |
| 1882 void | |
| 50 | 1883 code_leave(char *name) |
| 0 | 1884 { |
| 53 | 1885 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 0 | 1886 printf("_%d:\n",labelno); |
| 1887 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1888 local_table(); |
| 0 | 1889 labelno++; |
| 1890 } | |
| 1891 | |
| 1892 void | |
| 1893 enter(char *name) | |
| 1894 { | |
| 1895 printf("\t.align 2\n"); | |
| 1896 if (stmode!=STATIC) | |
| 1897 printf(".globl %s\n",name); | |
| 1898 printf("%s:\n",name); | |
| 1899 printf("\t.type\t%s,@function\n",name); | |
| 1900 printf("\tpushl %%ebp\n"); | |
| 1901 printf("\tmovl %%esp,%%ebp\n"); | |
| 1902 printf("\tpushl %%ebx\n"); | |
| 24 | 1903 printf("\tpushl %%esi\n"); |
| 1904 printf("\tpushl %%edi\n"); | |
| 42 | 1905 free_all_register(); |
| 0 | 1906 } |
| 1907 | |
| 1908 void | |
| 50 | 1909 enter1() |
| 0 | 1910 { |
| 36 | 1911 func_disp_label=fwdlabel(); |
| 50 | 1912 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); |
| 36 | 1913 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ |
| 0 | 1914 } |
| 1915 | |
| 1916 void | |
| 50 | 1917 leave(int control, char *name) |
| 0 | 1918 { |
| 1919 if (control) | |
| 1920 use_register(creg,REG_EAX,1); | |
| 1921 if (retcont) { | |
| 1922 if (control) | |
| 1923 jmp(retlabel); | |
| 1924 fwddef(retcont); | |
| 1925 use_register(creg,REG_EAX,0); | |
| 18 | 1926 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); |
| 0 | 1927 /* printf("\tleave\n"); */ |
| 1928 } | |
| 1929 fwddef(retlabel); | |
| 42 | 1930 /* use_register(creg,REG_EAX,0); too late */ |
| 52 | 1931 /* if(disp) printf("\taddl $%d,%%esp\n",-disp); */ |
| 0 | 1932 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 24 | 1933 printf("\tpopl %%edi\n"); |
| 1934 printf("\tpopl %%esi\n"); | |
| 0 | 1935 printf("\tpopl %%ebx\n"); |
| 1936 printf("\tleave\n"); | |
| 1937 printf("\tret\n"); | |
| 52 | 1938 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); |
| 0 | 1939 printf("_%d:\n",labelno); |
| 1940 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1941 local_table(); |
| 0 | 1942 labelno++; |
| 1943 } | |
| 1944 | |
| 1945 | |
| 1946 void | |
| 1947 ret(void) | |
| 1948 { | |
| 1949 use_register(creg,REG_EAX,1); | |
| 1950 jmp(retlabel); | |
| 1951 } | |
| 1952 | |
| 1953 void | |
| 1954 gen_gdecl(char *n, int gpc) | |
| 1955 { | |
| 1956 /* | |
| 1957 if (stmode!=STATIC) | |
| 1958 printf(".globl %s\n",n); | |
| 1959 */ | |
| 1960 } | |
| 1961 | |
| 1962 void | |
| 1963 align(int t) | |
| 1964 { | |
| 1965 if (t!=CHAR) { | |
| 1966 if (data_alignment & 1) | |
| 1967 printf("\t.align 2\n"); | |
| 1968 data_alignment = 0; | |
| 1969 } | |
| 1970 } | |
| 1971 | |
| 1972 void | |
| 1973 emit_data(int e, int t, NMTBL *n) | |
| 1974 { | |
| 1975 int l; | |
| 1976 char *name; | |
| 1977 name = n->nm; | |
| 13 | 1978 if(mode!=GDECL) { |
| 1979 error(-1); return; | |
| 1980 } | |
| 1981 if (n->dsp != -1) { | |
| 1982 n->dsp = -1; /* initiallized flag */ | |
| 1983 printf(".globl\t%s\n",name); | |
| 1984 data_mode(name); | |
| 1985 align(t); | |
| 1986 printf("%s:\n",name); | |
| 1987 } else { | |
| 1988 data_mode(0); | |
| 1989 } | |
| 1990 if(car(e)==CONST) { | |
| 1991 if (t==CHAR) { | |
| 1992 printf("\t.byte %d\n",cadr(e)); | |
| 1993 if (data_alignment>0) | |
| 1994 data_alignment++; | |
| 1995 gpc += 1; | |
| 0 | 1996 } else { |
| 13 | 1997 printf("\t.long %d\n",cadr(e)); |
| 3 | 1998 gpc += size_of_int; |
| 13 | 1999 } |
| 2000 } else if(t!=CHAR) { | |
| 2001 gpc += size_of_int; | |
| 2002 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 18 | 2003 printf("\t.long %s\n",(char *)caddr(cadr(e))); |
| 13 | 2004 } else if(car(e)==FNAME) { |
| 2005 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 2006 } else if(car(e)==STRING) { | |
| 2007 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 2008 l = fwdlabel(); | |
| 2009 printf("\t.long _%d\n",l); | |
| 2010 printf(".section\t.rodata\n"); | |
| 2011 printf("_%d:\n",l); | |
| 2012 output_mode = RODATA_EMIT_MODE; | |
| 2013 } | |
| 2014 ascii((char *)cadr(e)); | |
| 2015 } else error(TYERR); | |
| 0 | 2016 } |
| 2017 } | |
| 2018 | |
| 2019 void | |
| 2020 emit_data_closing(NMTBL *n) | |
| 2021 { | |
| 2022 int lb; | |
| 18 | 2023 if (mode==GDECL) { |
| 0 | 2024 data_mode(0); |
| 2025 lb=fwdlabel(); | |
| 2026 printf("_%d:\n",lb); | |
| 2027 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 2028 } | |
| 2029 } | |
| 2030 | |
| 2031 void | |
| 2032 global_table(void) | |
| 2033 { | |
| 2034 NMTBL *n; | |
| 12 | 2035 int init; |
| 2036 init=0; | |
| 0 | 2037 for(n=ntable;n < &ntable[GSYMS];n++) { |
| 2038 if (n->sc == GVAR && n->dsp != -1) { | |
| 2039 /* n->dsp = -1 means initialized global */ | |
| 12 | 2040 if (init==0) { |
| 2041 data_mode(0); | |
| 2042 init=1; | |
| 2043 } | |
| 0 | 2044 printf(".comm %s,%d\n",n->nm,size(n->ty)); |
| 2045 } | |
| 2046 } | |
| 2047 } | |
| 2048 | |
| 2049 void | |
| 2050 local_table(void) | |
| 2051 { | |
| 2052 NMTBL *n; | |
| 12 | 2053 int init; |
| 2054 init=0; | |
| 0 | 2055 /* static local variables */ |
| 2056 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 2057 if (n->sc == GVAR) { | |
| 12 | 2058 if (init==0) { |
| 2059 data_mode(0); | |
| 2060 init=1; | |
| 2061 } | |
| 0 | 2062 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); |
| 2063 } | |
| 2064 } | |
| 2065 } | |
| 2066 | |
| 2067 void | |
| 2068 text_mode(void) | |
| 2069 { | |
| 2070 if (output_mode!=TEXT_EMIT_MODE) { | |
| 2071 printf(".text\n"); | |
| 2072 printf("\t.align 2\n"); | |
| 2073 output_mode = TEXT_EMIT_MODE; | |
| 2074 } | |
| 2075 } | |
| 2076 | |
| 2077 void | |
| 2078 data_mode(char *name) | |
| 2079 { | |
| 2080 if (output_mode!=DATA_EMIT_MODE) { | |
| 2081 printf(".data\n"); | |
| 2082 output_mode = DATA_EMIT_MODE; | |
| 2083 } | |
| 2084 if (name) | |
| 2085 printf("\t.type\t%s,@object\n",name); | |
| 2086 } | |
| 2087 | |
| 2088 int | |
| 2089 lvar(int l) | |
| 2090 { | |
| 50 | 2091 if (fnptr->sc==CODE) { |
| 53 | 2092 return l+code_disp_offset; |
| 50 | 2093 } else if (l<0) { |
| 2094 return l+disp_offset; | |
| 0 | 2095 } else { |
| 50 | 2096 return l+arg_offset; |
| 0 | 2097 } |
| 2098 } | |
| 2099 | |
| 50 | 2100 |
| 0 | 2101 /* end */ |