Mercurial > hg > CbC > old > device
annotate mc-nop-386.c @ 56:5aa4528b6983 parallel-assign-c
A little optimized parallel assignment
| author | kono |
|---|---|
| date | Wed, 19 Feb 2003 12:15:05 +0900 |
| parents | 94564b45c4f3 |
| children | 3d7f199e99d0 |
| 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); | |
| 55 | 42 static void b_expr(int e1, char cond, int l1,int err); |
| 18 | 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); |
| 55 | 76 extern int append4(int target,int t,int ty,int e1); |
| 0 | 77 |
| 78 #define TEXT_EMIT_MODE 0 | |
| 79 #define DATA_EMIT_MODE 1 | |
| 80 #define RODATA_EMIT_MODE 2 | |
| 81 | |
| 18 | 82 static int output_mode = TEXT_EMIT_MODE; |
| 83 static int data_alignment = 0; | |
| 0 | 84 |
| 36 | 85 static int code_disp_label; |
| 86 static int func_disp_label; | |
| 87 | |
| 0 | 88 /* |
| 53 | 89 -16 -8 local2 |
| 90 -12 -4 local1 | |
| 91 -8 8 arg3 | |
| 92 -4 4 arg2 | |
| 93 0 0 arg1 | |
| 94 local2 -20 4 0 (%edi) | |
| 95 local1 <-- -16 0 local variable 0 (%esi) | |
| 50 | 96 %edi -12 <- disp_offset %ebp |
| 97 %esi -8 | |
| 0 | 98 %ebx -4 |
| 99 %ebp = %esp 0 | |
| 100 %eip 4 <- arg_offset | |
| 53 | 101 arg1 8 0 |
| 102 arg2 12 4 | |
| 50 | 103 see enter/enter1/leave see code_enter |
| 0 | 104 */ |
| 105 int arg_offset = 8; | |
| 3 | 106 int disp_offset = -12; |
| 107 int func_disp_offset = -12; | |
| 53 | 108 int code_disp_offset = 0; |
| 109 int jump_offset = 0; | |
| 110 | |
| 3 | 111 int size_of_int = 4; |
| 0 | 112 int endian = 0; |
| 113 int MAX_REGISTER=6; /* intel386¤Î¥ì¥¸¥¹¥¿¤ò4¤Ä¤Þ¤Ç»È¤¦*/ | |
| 114 int REAL_MAX_REGISTER=8; /* intel386¤Î¥ì¥¸¥¹¥¿¤¬8¤Ä¤È¤¤¤¦¤³¤È*/ | |
| 115 int MAX_DATA_REG=4; | |
| 116 int MAX_POINTER=3; | |
| 117 int MAX_REGISTGER_VAR=2; | |
| 118 | |
| 119 static int creg; /* current register */ | |
| 120 static int dreg; /* temporary register */ | |
| 121 static int reg_sp; /* REGister Stack-Pointer */ | |
| 122 | |
| 123 | |
| 124 #define REG_EAX 0 | |
| 125 #define REG_EBX 1 | |
| 126 #define REG_ECX 2 | |
| 127 #define REG_EDX 3 | |
| 128 #define REG_ESI 4 | |
| 129 #define REG_EDI 5 | |
| 130 #define REG_EBP 6 | |
| 131 #define REG_ESP 7 | |
| 132 | |
| 133 | |
| 134 #define DATA_REG 0 | |
| 135 #define POINTER_REG 3 | |
| 136 static char *reg_name[8]; | |
| 137 static char *reg_name_l[4]; | |
| 13 | 138 static char *reg_name_w[4]; |
| 0 | 139 |
| 140 /* | |
| 141 creg currrent virtual register | |
| 142 dreg spare virtual register | |
| 143 | |
| 144 rname[creg] currrent real register | |
| 145 rname[dreg] spare real register | |
| 146 | |
| 147 regs[] virtual register usage | |
| 40 | 148 regv[] value in virtual register flag |
| 0 | 149 |
| 150 reg_name[rname[creg]] | |
| 151 */ | |
| 152 | |
| 153 #define MAX_MAX 10 | |
| 154 static int rname[MAX_MAX]; | |
| 155 static int regs[MAX_MAX]; /* »È¤ï¤ì¤Æ¤¤¤ë¥ì¥¸¥¹¥¿¤ò¼¨¤¹¥Õ¥é¥° */ | |
| 156 static int reg_stack[MAX_MAX]; /* ¼ÂºÝ¤Î¥ì¥¸¥¹¥¿¤ÎÎΰè */ | |
| 40 | 157 static int regv[MAX_MAX]; /* Ãͤ¬Æþ¤Ã¤Æ¤¤¤ë¤«¤É¤¦¤« */ |
| 0 | 158 |
| 159 void | |
| 160 code_init(void) | |
| 161 { | |
| 24 | 162 arg_offset = 8; |
| 163 func_disp_offset = -12; | |
| 164 disp_offset = -12; | |
| 165 size_of_int = 4; | |
| 166 endian = 0; | |
| 167 MAX_REGISTER=6; | |
| 168 MAX_DATA_REG=4; | |
| 169 MAX_POINTER=3; | |
| 0 | 170 MAX_REGISTER_VAR=2; |
| 171 | |
| 172 reg_name[REG_EAX] = "%eax"; | |
| 173 reg_name[REG_EBX] = "%ebx"; | |
| 174 reg_name[REG_ECX] = "%ecx"; | |
| 175 reg_name[REG_EDX] = "%edx"; | |
| 176 reg_name[REG_ESI] = "%esi"; | |
| 177 reg_name[REG_EDI] = "%edi"; | |
| 178 reg_name[REG_EBP] = "%ebp"; | |
| 179 reg_name[REG_ESP] = "%esp"; | |
| 180 reg_name_l[REG_EAX] = "%al"; | |
| 181 reg_name_l[REG_EBX] = "%bl"; | |
| 182 reg_name_l[REG_ECX] = "%cl"; | |
| 183 reg_name_l[REG_EDX] = "%dl"; | |
| 13 | 184 reg_name_w[REG_EAX] = "%ax"; |
| 185 reg_name_w[REG_EBX] = "%bx"; | |
| 186 reg_name_w[REG_ECX] = "%cx"; | |
| 187 reg_name_w[REG_EDX] = "%dx"; | |
| 0 | 188 |
| 189 } | |
| 190 | |
| 191 char * | |
| 18 | 192 register_name(int i,int byte) |
| 0 | 193 { |
| 38 | 194 if (i<0) { |
| 195 error(REG_ERR); | |
| 196 return "%eax"; | |
| 197 } | |
| 24 | 198 if (byte && rname[i] <= REG_EDX) { |
| 18 | 199 return reg_name_l[rname[i]]; |
| 200 } else { | |
| 24 | 201 return reg_name[rname[i]]; /* should be error */ |
| 18 | 202 } |
| 0 | 203 } |
| 204 | |
| 205 int | |
| 206 get_register(void) | |
| 207 { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¥ì¥¸¥¹¥¿¤òÄ´¤Ù¤ë */ | |
| 208 int i; | |
| 209 for(i=0;i<MAX_REGISTER;i++) { | |
| 210 if (! regs[i]) { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¤Ê¤é */ | |
| 211 regs[i]=1; /* ¤½¤Î¥ì¥¸¥¹¥¿¤ò»È¤¦¤³¤È¤òÀë¸À¤· */ | |
| 212 return i; /* ¤½¤Î¾ì½ê¤òɽ¤¹ÈÖ¹æ¤òÊÖ¤¹ */ | |
| 213 } | |
| 214 } | |
| 215 return -1; /* ¶õ¤¤¤Æ¤¤¤ë¾ì½ê¤¬¤Ê¤¤¤Ê¤é¡¢¤½¤ì¤òɽ¤¹ -1 ¤òÊÖ¤¹ */ | |
| 216 } | |
| 217 | |
| 218 void | |
| 219 free_register(int i) { /* ¤¤¤é¤Ê¤¯¤Ê¤Ã¤¿¥ì¥¸¥¹¥¿¤ò³«Êü */ | |
| 40 | 220 regv[i]=regs[i]=0; |
| 0 | 221 } |
| 222 | |
| 223 int | |
| 224 register_full(void) | |
| 225 { | |
| 226 int i; | |
| 227 for(i=0;i<MAX_REGISTER;i++) { | |
| 228 if (! regs[i]) { | |
| 229 return 0; | |
| 230 } | |
| 231 } | |
| 232 return 1; | |
| 233 } | |
| 234 | |
| 23 | 235 static |
| 236 int | |
| 237 free_register_count(void) | |
| 238 { | |
| 239 int i,count; | |
| 240 count = 0; | |
| 241 for(i=0;i<MAX_REGISTER;i++) { | |
| 42 | 242 if (! regs[i] && ! regv[i]) count++; |
| 23 | 243 } |
| 244 return count; | |
| 245 } | |
| 246 | |
| 42 | 247 static void |
| 248 free_all_register(void) | |
| 249 { | |
| 250 int i; | |
| 251 for(i=0;i<MAX_REGISTER;i++) { | |
| 252 regs[i]=regv[i]=0; | |
| 253 } | |
| 254 creg = get_register(); | |
| 255 dreg = get_register(); | |
| 256 return; | |
| 257 } | |
| 258 | |
| 40 | 259 void |
| 260 use_register_var(int i) { | |
| 261 regv[i]=1; | |
| 262 } | |
| 263 | |
| 264 static int creg_regvar = -1; | |
| 265 static int creg_regvar_back; | |
| 266 static int creg_back; | |
| 267 | |
| 268 void | |
| 269 creg_destroy() { | |
| 270 creg_back = creg; creg_regvar_back = creg_regvar; | |
| 271 if (creg_regvar>=0) | |
| 272 creg = creg_regvar; | |
| 273 creg_regvar=-1; | |
| 274 } | |
| 275 | |
| 276 void | |
| 277 creg_un_destroy() { | |
| 278 creg = creg_back; creg_regvar = creg_regvar_back; | |
| 279 } | |
| 280 | |
| 42 | 281 void |
| 282 register_usage(char *s) | |
| 283 { | |
| 284 int i; | |
| 285 printf("# %d: %s:",lineno,s); | |
| 286 printf(" creg=%s dreg=%s ",register_name(creg,0),register_name(dreg,0)); | |
| 287 for(i=0;i<MAX_REGISTER;i++) { | |
| 288 printf("%d",regs[i]); | |
| 289 } | |
| 290 printf(":"); | |
| 291 for(i=0;i<MAX_REGISTER;i++) { | |
| 292 printf("%d",regv[i]); | |
| 293 } | |
| 294 #if 0 | |
| 295 printf(" regs_stack",register_name(creg,0),register_name(dreg,0)); | |
| 296 for(i=reg_sp;i>=0;i--) { | |
| 297 if(reg_stack[i]>=0) | |
| 298 printf(" %s",register_name(reg_stack[i],0)); | |
| 299 } | |
| 300 #endif | |
| 301 printf("\n"); | |
| 302 } | |
| 23 | 303 |
| 0 | 304 void |
| 305 gexpr_init(void) | |
| 306 { | |
| 307 while(reg_sp > 0) { | |
| 308 free_register(reg_stack[--reg_sp]); | |
| 309 } | |
| 310 text_mode(); | |
| 26 | 311 use_register(creg,REG_EAX,0); |
| 42 | 312 regv[dreg]=0; |
| 40 | 313 creg_regvar = -1; |
| 42 | 314 register_usage("gexpr_init"); |
| 0 | 315 } |
| 316 | |
| 42 | 317 |
| 0 | 318 void |
| 319 emit_init(void) | |
| 320 { | |
| 321 int i; | |
| 40 | 322 for(i=0;i<REAL_MAX_REGISTER;i++) { regs[i]=0; regv[i]=0;rname[i]=i;} |
| 42 | 323 free_all_register(); |
| 0 | 324 reg_sp = 0; |
| 325 text_mode(); | |
| 326 } | |
| 327 | |
| 328 int | |
| 329 virtual(int real) | |
| 330 { | |
| 331 int real_v,i; | |
| 332 real_v = -1; | |
| 333 for(i=0;i<MAX_REGISTER;i++) { | |
| 334 if (rname[i]==real) { | |
| 335 real_v=i; | |
| 336 break; | |
| 337 } | |
| 338 } | |
| 23 | 339 /* if (real_v == -1) |
| 340 error(-1); */ | |
| 0 | 341 return real_v; |
| 342 } | |
| 343 | |
| 344 void | |
| 345 use_register(int virt, int real, int move) | |
| 346 { | |
| 347 int real_v; | |
| 348 char *move_op; | |
| 349 if (rname[virt]==real) | |
| 350 return; | |
| 351 real_v = virtual(real); | |
| 352 move_op = regs[real_v]?"\txchg %s,%s\n":"\tmovl %s,%s\n"; | |
| 41 | 353 if (move || (regv[real_v])) { |
| 0 | 354 printf(move_op,reg_name[rname[virt]],reg_name[real]); |
| 355 } | |
| 356 rname[real_v] = rname[virt]; | |
| 357 rname[virt] = real; | |
| 358 } | |
| 359 | |
| 360 void | |
| 361 use_pointer(int virt, int move) | |
| 362 { | |
| 363 int i; | |
| 364 if (rname[virt]>=POINTER_REG) | |
| 365 return; | |
| 366 for(i=POINTER_REG;i<MAX_REGISTER;i++) { | |
| 367 if (!regs[virtual(i)]) { | |
| 368 use_register(virt,i,move); | |
| 369 return; | |
| 370 } | |
| 371 } | |
| 372 /* we prefer EBX */ | |
| 373 use_register(virt,REG_EBX,move); | |
| 374 } | |
| 375 | |
| 376 void | |
| 377 use_data_reg(int virt, int move) | |
| 378 { | |
| 379 int i; | |
| 380 if (rname[virt]<MAX_DATA_REG) | |
| 381 return; | |
| 382 for(i=0;i<MAX_DATA_REG;i++) { | |
| 383 if (!regs[virtual(i)]) { | |
| 384 use_register(virt,i,move); | |
| 385 return; | |
| 386 } | |
| 387 } | |
| 388 /* we prefer EBX */ | |
| 389 use_register(virt,REG_EBX,move); | |
| 390 } | |
| 391 | |
| 392 int | |
| 393 pop_register(void) | |
| 394 { /* ¥ì¥¸¥¹¥¿¤«¤éÃͤò¼è¤ê½Ð¤¹ */ | |
| 42 | 395 return reg_stack[--reg_sp]; |
| 0 | 396 } |
| 397 | |
| 398 int | |
| 399 stack_used(void) { | |
| 400 return reg_stack[--reg_sp]<0; | |
| 401 } | |
| 402 | |
| 403 void | |
| 404 emit_push(void) | |
| 405 { | |
| 406 int new_reg; | |
| 407 new_reg = get_register(); | |
| 408 if(new_reg<0) { /* ¤â¤¦¥ì¥¸¥¹¥¿¤¬¤Ê¤¤ */ | |
| 409 reg_stack[reg_sp++] = -1; | |
| 18 | 410 printf("\tpushl %s\n",register_name(creg,0)); |
| 42 | 411 /* creg is used soon, don't regv[creg]=0 */ |
| 0 | 412 } else { |
| 413 reg_stack[reg_sp++] = creg; /* push ¤¹¤ë¤«¤ï¤ê¤Ë¥ì¥¸¥¹¥¿¤ò»È¤¦ */ | |
| 18 | 414 creg = new_reg; |
| 42 | 415 regv[creg]=1; |
| 0 | 416 } |
| 42 | 417 } |
| 418 | |
| 419 void | |
| 420 emit_push_x(int xreg) | |
| 421 { | |
| 422 int new_reg; | |
| 423 new_reg = get_register(); | |
| 424 if(new_reg<0) { /* ¤â¤¦¥ì¥¸¥¹¥¿¤¬¤Ê¤¤ */ | |
| 425 reg_stack[reg_sp++] = -1; | |
| 426 printf("\tpushl %s\n",register_name(xreg,0)); | |
| 427 /* creg is used soon, don't regv[xreg]=0 */ | |
| 428 } else { | |
| 429 reg_stack[reg_sp++] = xreg; /* push ¤¹¤ë¤«¤ï¤ê¤Ë¥ì¥¸¥¹¥¿¤ò»È¤¦ */ | |
| 430 xreg = new_reg; | |
| 431 regv[xreg]=1; | |
| 432 } | |
| 0 | 433 } |
| 434 | |
| 18 | 435 int |
| 0 | 436 emit_pop(int type) |
| 437 { | |
| 18 | 438 int xreg; |
| 42 | 439 if ((xreg=pop_register())==-1) { |
| 0 | 440 if (type==POINTER_REG) |
| 441 use_pointer(dreg,0); | |
| 442 else if (type==DATA_REG) | |
| 443 use_data_reg(dreg,0); | |
| 42 | 444 if (regv[dreg]) { |
| 445 printf("# emit_pop dreg conflict\n"); | |
| 446 } | |
| 18 | 447 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 448 xreg = dreg; |
| 42 | 449 regv[xreg]=1; |
| 450 } | |
| 451 return xreg; | |
| 452 } | |
| 453 | |
| 454 static void | |
| 455 emit_pop_free(int xreg) | |
| 456 { | |
| 457 if (xreg==dreg) { | |
| 458 regv[dreg]=0; | |
| 43 | 459 } else if (xreg!=-1) { |
| 42 | 460 free_register(xreg); |
| 0 | 461 } |
| 462 } | |
| 463 | |
| 464 int | |
| 465 get_register_var(void) | |
| 466 { | |
| 467 int i; | |
| 468 for(i=REG_ESI;i<REG_ESP;i++) { | |
| 469 if (! regs[i]) { /* »È¤ï¤ì¤Æ¤¤¤Ê¤¤¤Ê¤é */ | |
| 470 regs[i]=1; /* ¤½¤Î¥ì¥¸¥¹¥¿¤ò»È¤¦¤³¤È¤òÀë¸À¤· */ | |
| 41 | 471 regv[i]=0; |
| 0 | 472 return i; /* ¤½¤Î¾ì½ê¤òɽ¤¹ÈÖ¹æ¤òÊÖ¤¹ */ |
| 473 } | |
| 474 } | |
| 475 return -1; | |
| 476 } | |
| 477 | |
| 478 void | |
| 479 gexpr(int e1) | |
| 480 { | |
| 481 gexpr_init(); | |
| 24 | 482 #if 0 |
| 32 | 483 if(lineno==2862) { |
| 24 | 484 g_expr(e1); /*break here*/ |
| 485 return; | |
| 486 } | |
| 487 #endif | |
| 0 | 488 g_expr(e1); |
| 42 | 489 } |
| 490 | |
| 491 int | |
| 492 csvalue() | |
| 493 { | |
| 494 return rname[creg]; /* for siwtch value */ | |
| 0 | 495 } |
| 496 | |
| 497 void | |
| 498 g_expr(int e1) | |
| 499 { | |
| 22 | 500 int e2,e3/*,e4*/; |
| 0 | 501 char *xrn; |
| 502 NMTBL *n; | |
| 503 | |
| 504 if (chk) return; | |
| 505 e2 = cadr(e1); | |
| 506 switch (car(e1)){ | |
| 507 case GVAR: | |
| 508 /* use_pointer(creg,0); */ | |
| 18 | 509 printf("\tmovl $%s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 510 regv[creg]=1; |
| 0 | 511 return; |
| 512 case RGVAR: | |
| 513 /* use_pointer(creg,0); */ | |
| 18 | 514 printf("\tmovl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 515 regv[creg]=1; |
| 0 | 516 return; |
| 517 case CRGVAR: | |
| 27 | 518 printf("\tmovsbl %s,%s\n",(char *)caddr(e1),register_name(creg,0)); |
| 42 | 519 regv[creg]=1; |
| 0 | 520 return; |
| 521 case LVAR: | |
| 522 /* use_pointer(creg,0); */ | |
| 18 | 523 printf("\tlea %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 524 regv[creg]=1; |
| 0 | 525 return; |
| 526 case REGISTER: | |
| 527 /* this is of course redundant... */ | |
| 18 | 528 /* we can use rname for this? */ |
| 529 /* or why not creg=e2? */ | |
| 530 printf("\tmovl %s,%s\n",register_name(e2,0),register_name(creg,0)); | |
| 42 | 531 regv[creg]=1; |
| 0 | 532 return; |
| 533 case RLVAR: | |
| 18 | 534 printf("\tmovl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 535 regv[creg]=1; |
| 0 | 536 return; |
| 537 case CRLVAR: | |
| 21 | 538 printf("\tmovsbl %d(%%ebp),%s\n",lvar(e2),register_name(creg,0)); |
| 42 | 539 regv[creg]=1; |
| 0 | 540 return; |
| 541 case FNAME: | |
| 18 | 542 printf("\tmovl $%s,%s\n",((NMTBL *)e2)->nm,register_name(creg,0)); |
| 42 | 543 regv[creg]=1; |
| 0 | 544 return; |
| 545 case CONST: /* ÂåÆþ¤¹¤ëÃͤ¬0¤Ç¤âÆÃÊ̤ʽèÍý¤Ï¤·¤Ê¤¤ */ | |
| 18 | 546 printf("\tmovl $%d,%s\n",e2,register_name(creg,0)); |
| 42 | 547 regv[creg]=1; |
| 0 | 548 return; |
| 549 case STRING: | |
| 550 string(e1); | |
| 42 | 551 regv[creg]=1; |
| 0 | 552 return; |
| 553 case FUNCTION: | |
| 554 function(e1); | |
| 42 | 555 regv[creg]=1; |
| 0 | 556 return; |
| 557 case CODE: | |
| 558 jump(e2,caddr(e1)); | |
| 559 return; | |
| 560 case INDIRECT: | |
| 561 g_expr(e2); | |
| 562 return; | |
| 563 case RINDIRECT: case CRINDIRECT: | |
| 564 rindirect(e1); | |
| 565 return; | |
| 566 case ADDRESS: | |
| 567 g_expr(e2); | |
| 568 return; | |
| 569 case MINUS: /* ¥ì¥¸¥¹¥¿¤ËÂФ·¡¢negl¤ò¼Â¹Ô¤¹¤ì¤Ð¼Â¸½²Äǽ */ | |
| 570 g_expr(e2); | |
| 571 /* use_data_reg(creg,1); */ | |
| 18 | 572 printf("\tnegl %s\n", register_name(creg,0)); |
| 0 | 573 return; |
| 574 case BNOT: /* ~ */ | |
| 575 g_expr(e2); | |
| 576 /* use_data_reg(creg,1); */ | |
| 18 | 577 printf("\tnotl %s\n", register_name(creg,0)); |
| 0 | 578 return; |
| 579 case LNOT: /* ! */ | |
| 580 g_expr(e2); | |
| 581 use_data_reg(creg,1); | |
| 18 | 582 xrn = register_name(creg,1); |
| 583 printf("\tcmpl $0,%s\n", register_name(creg,0)); | |
| 584 printf("\tsete %s\n", xrn); | |
| 585 printf("\tmovzbl %s,%s\n", xrn,register_name(creg,0)); | |
| 0 | 586 return; |
| 587 case PREINC: | |
| 588 if (car(e2)==REGISTER) { | |
| 18 | 589 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 590 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 591 return; |
| 592 } | |
| 593 g_expr(e2); | |
| 18 | 594 xrn = register_name(creg,0); |
| 595 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); | |
| 596 printf("\tmovl (%s),%s\n",xrn,xrn); | |
| 0 | 597 return; |
| 598 case POSTINC: | |
| 599 if (car(e2)==REGISTER) { | |
| 18 | 600 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 601 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 0 | 602 return; |
| 603 } | |
| 604 g_expr(e2); | |
| 605 emit_push(); | |
| 41 | 606 xrn = register_name((e2=emit_pop(0)),0); |
| 18 | 607 printf("\tmovl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 608 printf("\taddl $%d,(%s)\n",caddr(e1),xrn); |
| 42 | 609 emit_pop_free(e2); |
| 0 | 610 return; |
| 611 case CPOSTINC: | |
| 612 /* char *p; *p++ */ | |
| 613 if (car(e2)==REGISTER) { | |
| 18 | 614 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 615 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); | |
| 0 | 616 return; |
| 617 } | |
| 618 g_expr(e2); | |
| 42 | 619 emit_push(); |
| 41 | 620 xrn = register_name((e2=emit_pop(0)),1); |
| 18 | 621 printf("\tmovsbl (%s),%s\n",xrn,register_name(creg,0)); |
| 0 | 622 printf("\tincl (%s)\n",xrn); |
| 42 | 623 emit_pop_free(e2); |
| 0 | 624 return; |
| 625 case CPREINC: | |
| 626 if (car(e2)==REGISTER) { | |
| 18 | 627 printf("\taddl $%d,%s\n",caddr(e1),register_name(cadr(e2),0)); |
| 628 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 629 return; |
| 630 } | |
| 631 g_expr(e2); | |
| 18 | 632 printf("\tincl (%s)\n",register_name(creg,0)); |
| 21 | 633 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 0 | 634 return; |
| 635 case CPOSTDEC: | |
| 636 if (car(e2)==REGISTER) { | |
| 18 | 637 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); |
| 638 printf("\tdecl %s\n",register_name(cadr(e2),0)); | |
| 0 | 639 return; |
| 640 } | |
| 641 g_expr(e2); | |
| 21 | 642 printf("\tmovsbl (%s),%s\n",register_name(creg,0),register_name(creg,0)); |
| 18 | 643 printf("\tdecl (%s)\n",register_name(creg,0)); |
| 0 | 644 return; |
| 645 case CPREDEC: | |
| 646 if (car(e2)==REGISTER) { | |
| 18 | 647 printf("\tdecl %s\n",register_name(cadr(e2),0)); |
| 648 printf("\tmovl %s,%s\n",register_name(cadr(e2),0),register_name(creg,0)); | |
| 0 | 649 return; |
| 650 } | |
| 651 g_expr(e2); | |
| 652 emit_push(); | |
| 18 | 653 e2 = emit_pop(0); |
| 654 printf("\tdecl (%s)\n",register_name(e2,0)); | |
| 21 | 655 printf("\tmovsbl (%s),%s\n",register_name(e2,0),register_name(creg,0)); |
| 42 | 656 emit_pop_free(e2); |
| 0 | 657 return; |
| 658 case MUL: case UMUL: | |
| 659 case DIV: case UDIV: | |
| 660 case MOD: case UMOD: | |
| 661 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT: | |
| 662 case ADD: case SUB: case BAND: case EOR: case BOR: | |
| 663 machinop(e1); | |
| 664 return; | |
| 665 case COND: | |
| 666 e2=fwdlabel(); | |
| 55 | 667 b_expr(cadr(e1),0,e2,0); |
| 22 | 668 use_register(creg,REG_EAX,0); |
| 0 | 669 g_expr(caddr(e1)); |
| 22 | 670 /* e4 = rname[creg]; this is a bad idea */ |
| 671 use_register(creg,REG_EAX,1); | |
| 0 | 672 jmp(e3=fwdlabel()); |
| 673 fwddef(e2); | |
| 22 | 674 use_register(creg,REG_EAX,0); |
| 0 | 675 g_expr(cadddr(e1)); |
| 22 | 676 /* use_register(creg,e4,1); */ |
| 677 use_register(creg,REG_EAX,1); | |
| 0 | 678 fwddef(e3); |
| 679 return; | |
| 37 | 680 case RSTRUCT: |
| 681 g_expr(e2); | |
| 682 return; | |
| 0 | 683 case SASS: |
| 684 sassign(e1); | |
| 685 return; | |
| 686 case ASS: case CASS: | |
| 687 assign(e1); | |
| 688 return; | |
| 689 case ASSOP: case CASSOP: | |
| 690 assop(e1); | |
| 691 return; | |
| 692 case COMMA: | |
| 693 g_expr(e2); | |
| 694 g_expr(caddr(e1)); | |
| 695 return; | |
| 696 case RETURN: | |
| 697 n = (NMTBL *)e2; | |
| 698 if (retcont==0) | |
| 699 retcont=fwdlabel(); | |
| 18 | 700 printf("\tleal _%d,%s\n",retcont,register_name(creg,0)); |
| 42 | 701 regv[creg]=1; |
| 0 | 702 return; |
| 703 case ENVIRONMENT: | |
| 18 | 704 printf("\tmovl %%ebp,%s\n",register_name(creg,0)); |
| 42 | 705 regv[creg]=1; |
| 0 | 706 return; |
| 707 default: | |
| 55 | 708 b_expr(e1,1,e2=fwdlabel(),1); /* including > < ... */ |
| 18 | 709 xrn = register_name(creg,0); |
| 710 printf("\txorl %s,%s\n",xrn,xrn); | |
| 0 | 711 jmp(e3=fwdlabel()); |
| 712 fwddef(e2); | |
| 18 | 713 printf("\tmovl $1,%s\n",xrn); |
| 0 | 714 fwddef(e3); |
| 42 | 715 regv[creg]=1; |
| 0 | 716 } |
| 717 } | |
| 718 | |
| 719 void | |
| 720 bexpr(int e1, char cond, int l1) | |
| 721 { | |
| 722 gexpr_init(); | |
| 55 | 723 b_expr(e1,cond,l1,0); |
| 0 | 724 } |
| 725 | |
| 726 void | |
| 55 | 727 b_expr(int e1, char cond, int l1,int err) |
| 0 | 728 { |
| 729 int e2,l2; | |
| 730 if (chk) return; | |
| 731 e2=cadr(e1); | |
| 732 switch(car(e1)) { | |
| 733 case LNOT: | |
| 55 | 734 b_expr(e2,!cond,l1,0); |
| 0 | 735 return; |
| 736 case GT: | |
| 737 rexpr(e1,l1,cond?"g":"le"); | |
| 738 return; | |
| 739 case UGT: | |
| 740 rexpr(e1,l1,cond?"a":"be"); | |
| 741 return; | |
| 742 case GE: | |
| 743 rexpr(e1,l1,cond?"ge":"l"); | |
| 744 return; | |
| 745 case UGE: | |
| 746 rexpr(e1,l1,cond?"ae":"b"); | |
| 747 return; | |
| 748 case LT: | |
| 749 rexpr(e1,l1,cond?"l":"ge"); | |
| 750 return; | |
| 751 case ULT: | |
| 752 rexpr(e1,l1,cond?"b":"ae"); | |
| 753 return; | |
| 754 case LE: | |
| 755 rexpr(e1,l1,cond?"le":"g"); | |
| 756 return; | |
| 757 case ULE: | |
| 758 rexpr(e1,l1,cond?"be":"a"); | |
| 759 return; | |
| 760 case EQ: | |
| 761 rexpr(e1,l1,cond?"e":"ne"); | |
| 762 return; | |
| 763 case NEQ: | |
| 764 rexpr(e1,l1,cond?"ne":"e"); | |
| 765 return; | |
| 766 case LAND: | |
| 55 | 767 b_expr(e2,0,cond?(l2=fwdlabel()):l1,0); |
| 768 b_expr(caddr(e1),cond,l1,0); | |
| 0 | 769 if(cond) fwddef(l2); |
| 770 return; | |
| 771 case LOR: | |
| 55 | 772 b_expr(e2,1,cond?l1:(l2=fwdlabel()),0); |
| 773 b_expr(caddr(e1),cond,l1,0); | |
| 0 | 774 if(!cond) fwddef(l2); |
| 775 return; | |
| 776 case CRGVAR: | |
| 18 | 777 printf("\tcmpb $0,%s\n",(char *)caddr(e1)); |
| 0 | 778 jcond(l1,cond); |
| 779 return; | |
| 780 case CRLVAR: | |
| 781 printf("\tcmpb $0,%d(%%ebp)\n",lvar(e2)); | |
| 782 jcond(l1,cond); | |
| 783 return; | |
| 784 case RGVAR: | |
| 18 | 785 printf("\tcmpl $0,%s\n",(char *)caddr(e1)); |
| 0 | 786 jcond(l1,cond); |
| 787 return; | |
| 788 case RLVAR: | |
| 789 printf("\tcmpl $0,%d(%%ebp)\n",lvar(e2)); | |
| 790 jcond(l1,cond); | |
| 791 return; | |
| 792 case REGISTER: | |
| 18 | 793 printf("\tcmpl $0,%s\n",register_name(e2,0)); |
| 0 | 794 jcond(l1,cond); |
| 795 return; | |
| 796 case CONST: | |
| 797 if((cond&&e2)||(!cond&&!e2)) jmp(l1); | |
| 798 return; | |
| 799 default: | |
| 55 | 800 if(err) { |
| 801 error(-1); return; /* recursice g_expr/b_expr */ | |
| 802 } | |
| 0 | 803 g_expr(e1); |
| 18 | 804 printf("\tcmpl $0,%s\n",register_name(creg,0)); |
| 0 | 805 jcond(l1,cond); |
| 806 return; | |
| 807 } | |
| 808 } | |
| 809 | |
| 810 void | |
| 811 ascii(char *s) | |
| 812 { | |
| 813 printf("\t.string \""); | |
| 814 while(*s) { | |
| 815 if (*s=='\n') | |
| 816 printf("%cn",92); | |
| 817 else if (*s<' ') | |
| 818 printf("%c%03o",92,*s); | |
| 819 else if (*s==34) | |
| 820 printf("%c%c",92,34); | |
| 821 else | |
| 822 printf("%c",*s); | |
| 823 s++; | |
| 824 } | |
| 825 printf("%c\n",34); | |
| 826 } | |
| 827 | |
| 828 void | |
| 829 string(int e1) | |
| 830 { | |
| 831 char *s; | |
| 832 int i,lb; | |
| 833 | |
| 834 if (0) { | |
| 835 s=(char *)cadr(e1); | |
| 836 lb=fwdlabel(); | |
| 837 printf("\tjmp _%d\n",lb); | |
| 838 i=backdef(); | |
| 839 ascii(s); | |
| 840 printf("\t.align 2\n"); | |
| 841 fwddef(lb); | |
| 18 | 842 printf("\tlea _%d,%s\n",i,register_name(creg,0)); |
| 0 | 843 } else { |
| 844 s=(char *)cadr(e1); | |
| 845 printf(".section\t.rodata\n"); | |
| 846 lb=fwdlabel(); | |
| 847 printf("_%d:\n",lb); | |
| 848 ascii(s); | |
| 849 if (output_mode==TEXT_EMIT_MODE) { | |
| 850 printf(".text\n"); | |
| 851 } else { | |
| 852 text_mode(); | |
| 853 } | |
| 18 | 854 printf("\tlea _%d,%s\n",lb,register_name(creg,0)); |
| 0 | 855 } |
| 856 } | |
| 857 | |
| 13 | 858 #define MAX_COPY_LEN 20 |
| 859 | |
| 860 void | |
| 47 | 861 emit_copy(int from,int to,int length,int offset,int value) |
| 13 | 862 { |
| 39 | 863 int fix = 0; |
| 864 if (length<=0) return; | |
| 13 | 865 switch (length) { |
| 866 case 0: break; | |
| 867 case 1: | |
| 38 | 868 printf("\tmovb %d(%s),%s\n",offset,register_name(from,0), reg_name_l[rname[dreg]] ); |
| 869 printf("\tmovb %s,%d(%s)\n",reg_name_l[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 870 break; |
| 871 case 2: | |
| 38 | 872 printf("\tmovw %d(%s),%s\n",offset,register_name(from,0), reg_name_w[rname[dreg]] ); |
| 873 printf("\tmovw %s,%d(%s)\n",reg_name_w[rname[dreg]] ,offset,register_name(to,0)); | |
| 13 | 874 break; |
| 875 case 4: | |
| 38 | 876 printf("\tmovl %d(%s),%s\n",offset,register_name(from,0), register_name(dreg,0)); |
| 877 printf("\tmovl %s,%d(%s)\n",register_name(dreg,0), offset,register_name(to,0)); | |
| 13 | 878 break; |
| 879 default: | |
| 880 if (length <=MAX_COPY_LEN) { | |
| 14 | 881 for(;length>=4;length-=4,offset+=4) |
| 47 | 882 emit_copy(from,to,4,offset,0); |
| 14 | 883 for(;length>=2;length-=2,offset+=2) |
| 47 | 884 emit_copy(from,to,2,offset,0); |
| 13 | 885 if(length>0) |
| 47 | 886 emit_copy(from,to,length,offset,0); |
| 39 | 887 break; |
| 13 | 888 } |
| 39 | 889 use_register(from,REG_ESI,1); |
| 890 use_register(to, REG_EDI,1); | |
| 891 use_register(dreg,REG_ECX,0); | |
| 14 | 892 printf("\tmovl $%d,%%ecx\n",length/4); |
| 39 | 893 fix = (length/4)*4; |
| 13 | 894 printf("\tcld\n\trep\n\tmovsl\n"); |
| 14 | 895 if(length%4) { |
| 47 | 896 emit_copy(from,to,length,offset+length/4,0); |
| 14 | 897 } |
| 13 | 898 } |
| 47 | 899 if (value) { |
| 39 | 900 /* this code is necessary for the value of assignment or function call */ |
| 901 /* otherwise we don't need this */ | |
| 47 | 902 if (fix) printf("\tsubl $%d,%s\n",fix,register_name(to,0)); |
| 903 if(creg!=to) { | |
| 904 if (to==dreg) | |
| 905 printf("\tmovl %s,%s\n",register_name(to,0),register_name(creg,0)); | |
| 906 else { | |
| 907 free_register(creg); creg=to; | |
| 908 } | |
| 45 | 909 } |
| 39 | 910 } |
| 41 | 911 regv[from]=regv[to]=regv[dreg]=0; |
| 42 | 912 regv[creg]=1; |
| 13 | 913 } |
| 914 | |
| 915 int | |
| 916 struct_push(int e4,int t) | |
| 917 { | |
| 42 | 918 int length,xreg,save,lreg; |
| 13 | 919 g_expr(e4); |
| 14 | 920 length=size(t); |
| 921 if(length%size_of_int) { | |
| 922 length += size_of_int - (length%size_of_int); | |
| 13 | 923 } |
| 40 | 924 if (length==4) { |
| 925 printf("\tpushl (%s)\n",register_name(creg,0)); return 1; | |
| 926 } | |
| 927 if (length==8) { | |
| 928 printf("\tpushl 4(%s)\n",register_name(creg,0)); | |
| 929 printf("\tpushl (%s)\n",register_name(creg,0)); return 2; | |
| 930 } | |
| 38 | 931 /* I think, after g_expr, at least two registers are free */ |
| 14 | 932 printf("\tsubl $%d,%%esp\n",length); |
| 38 | 933 if (register_full()) { |
| 934 /* this is wrong assumption */ | |
| 935 save = 1; | |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
936 for(lreg=0;lreg==creg||lreg==dreg;lreg++); |
| 38 | 937 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
|
938 xreg = lreg; regv[xreg]=0; |
| 38 | 939 } else { |
| 940 save=0; | |
| 941 xreg = get_register(); | |
| 13 | 942 } |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
943 if (save) |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
944 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
|
945 else |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
946 printf("\tmovl %%esp,%s\n",register_name(xreg,0)); |
| 41 | 947 regv[xreg]=1; |
| 47 | 948 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
|
949 /* we have value in creg, it may be changed */ |
| 38 | 950 if (save) { |
|
46
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
951 if(creg==xreg) { |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
952 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
|
953 } |
|
b1c8ac8c308d
fix cascading struct retrun. Now it should be compatible with gcc
kono
parents:
45
diff
changeset
|
954 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
|
955 regv[xreg]=1; |
| 38 | 956 } else |
| 957 free_register(xreg); | |
| 14 | 958 return length/size_of_int; |
| 13 | 959 } |
| 960 | |
| 0 | 961 void |
| 962 function(int e1) | |
| 963 { | |
| 13 | 964 int e2,e3,e4,e5,nargs,t; |
| 0 | 965 NMTBL *n; |
| 23 | 966 int save,saved; |
| 967 if (free_register_count()<1) { | |
| 968 for(save = 0;save==dreg||save==creg;save++); | |
| 969 printf("\tpushl %s\n",register_name(save,0)); | |
| 970 saved = 1; | |
| 971 } else { | |
| 972 save = get_register(); | |
| 973 saved = 0; | |
| 974 } | |
| 41 | 975 regv[save]=0; |
| 0 | 976 e2 = cadr(e1); |
| 977 nargs = 0; | |
| 978 for (e3 = caddr(e1); e3; e3 = cadr(e3)) { | |
| 13 | 979 t=caddr(e3); |
| 0 | 980 n=(NMTBL *)(e5=(cadr(e4 = car(e3)))); |
| 981 switch(car(e4)) { | |
| 50 | 982 /* |
| 0 | 983 case FNAME: |
| 18 | 984 printf("\tlea %s,%s\n",n->nm,register_name(creg,0)); |
| 985 printf("\tpushl %s\n",register_name(creg,0)); | |
| 0 | 986 break; |
| 987 case ADDRESS: | |
| 988 g_expr(e5); | |
| 18 | 989 printf("\tpushl %s\n",register_name(creg,0)); |
| 0 | 990 break; |
| 50 | 991 */ |
| 13 | 992 default: |
| 993 if(scalar(t)) { | |
| 994 g_expr(e4); | |
| 18 | 995 printf("\tpushl %s\n",register_name(creg,0)); |
| 13 | 996 } else if (car(t)==STRUCT||car(t)==UNION) { |
| 997 nargs += struct_push(e4,t); | |
| 998 continue; | |
| 999 } else { | |
| 1000 error(TYERR); | |
| 1001 } | |
| 0 | 1002 } |
| 1003 ++nargs; | |
| 1004 } | |
| 1005 if (car(e2) == FNAME) { | |
| 1006 n=(NMTBL *)cadr(e2); | |
| 23 | 1007 } else { |
| 44 | 1008 use_register(creg,REG_EAX,0); |
| 23 | 1009 g_expr(e2); |
| 1010 } | |
| 1011 | |
| 26 | 1012 /* we don't have to save creg nor dreg */ |
| 41 | 1013 regs[creg]=0; regs[dreg]=0; |
| 1014 regv[creg]= regv[dreg]= regv[save]= 0; | |
| 23 | 1015 use_register(creg,REG_EAX,0); |
| 1016 use_register(dreg,REG_EDX,0); /* will be destroyed */ | |
| 1017 use_register(save,REG_ECX,0); /* will be destroyed */ | |
| 41 | 1018 regs[creg]=1; regs[dreg]=1; |
| 23 | 1019 |
| 1020 if (car(e2) == FNAME) { | |
| 0 | 1021 printf("\tcall\t%s\n",n->nm); |
| 23 | 1022 } else { |
| 18 | 1023 printf("\tcall\t*%s\n",register_name(creg,0)); |
| 0 | 1024 } |
| 6 | 1025 if (nargs) printf("\taddl $%d,%%esp\n",size_of_int*nargs); |
| 23 | 1026 if (saved) { |
| 1027 printf("\tpopl %s\n",register_name(save,0)); | |
| 1028 } else { | |
| 1029 free_register(save); | |
| 1030 } | |
| 41 | 1031 regv[save]=0; |
| 1032 regv[creg]=1; | |
| 0 | 1033 } |
| 1034 | |
| 51 | 1035 /* goto arguments list */ |
| 52 | 1036 /* target list4(list2(tag,disp),cdr,ty,source_expr) */ |
| 51 | 1037 /* source expr=listn(tag,...) */ |
| 1038 /* source (after) list2(tag,disp) */ | |
| 52 | 1039 /* source list list3(e,cdr,sz) */ |
| 48 | 1040 |
| 56 | 1041 #define DEBUG_PARALLEL_ASSIGN 0 |
| 1042 | |
| 48 | 1043 int |
| 52 | 1044 overrap(int t,int sz,int source) |
| 48 | 1045 { |
| 52 | 1046 int s,s0,s1; |
| 1047 int t0=cadr(t); | |
| 1048 int t1=t0+sz; | |
| 48 | 1049 for(;source;source=cadr(source)) { |
| 52 | 1050 s=car(source); s0=cadr(s); |
| 1051 if(car(s)==REGISTER && car(t)==REGISTER) { | |
| 56 | 1052 if(s0==t0) return s; |
| 52 | 1053 } else if (is_same_type(s,t)) { |
| 1054 s1=s0+caddr(source); | |
| 56 | 1055 #if DEBUG_PARALLEL_ASSIGN>1 |
| 51 | 1056 printf("# ovedrrap source %d t0 %d t1 %d\n",car(car(t)),t0,t1); |
| 1057 printf("# ovedrrap target %d s0 %d s1 %d\n",car(car(source)),s0,s1); | |
| 54 | 1058 printf("# ovedrrap equal = %d\n",((t0<=s0&&s0<t1)||(t0<s1&&s1<=t1))); |
| 52 | 1059 #endif |
| 55 | 1060 if((t0<=s0&&s0<t1)||(t0<s1&&s1<=t1)) return s; |
| 48 | 1061 } |
| 1062 } | |
| 1063 return 0; | |
| 1064 } | |
| 1065 | |
| 51 | 1066 void |
| 55 | 1067 remove_target(int *target,int t,int *use) |
| 1068 { | |
| 1069 int use0=*use; | |
| 1070 while(use0) { | |
| 1071 if (car(use0)==t) { | |
| 1072 free_register(caddr(use0)); | |
| 1073 break; | |
| 51 | 1074 } |
| 55 | 1075 use0 = cadr(use0); |
| 1076 } | |
| 1077 remove0(target,t); | |
| 1078 } | |
| 1079 | |
| 1080 void | |
| 1081 save_target(int t,int s,int *target,int *use,int sz,int ty) | |
| 1082 { | |
| 1083 int e1; | |
| 1084 /*¿·¤·¤¤¥ì¥¸¥¹¥¿(or ¥¹¥¿¥Ã¥¯)¤ò¼èÆÀ¤¹¤ë*/ | |
| 1085 if (sz==size_of_int && (e1=get_register())!=-1) { | |
| 1086 *use=list3(t,*use,e1); | |
| 1087 e1=list2(REGISTER,e1); | |
| 1088 g_expr(assign_expr0(e1,s,ty,ty)); | |
| 1089 *target = append4(*target,t,ty,e1); | |
| 1090 } else { | |
| 1091 disp-=sz; | |
| 1092 g_expr(assign_expr0((e1=list2(LVAR,disp)),s,ty,ty)); | |
| 1093 *target = append4(*target,t,ty,e1); | |
| 51 | 1094 } |
| 1095 } | |
| 1096 | |
| 56 | 1097 int |
| 1098 circular_dependency(int t,int s,int *target,int *source) | |
| 1099 { | |
| 1100 int target0=*target; | |
| 1101 int t1,sz,ty,s1; | |
| 1102 while(target0) { | |
| 1103 if (cadddr(target0)==s) { | |
| 1104 t1=car(target0); | |
| 1105 s=cadddr(target0); | |
| 1106 sz=size(ty=caddr(target0)); | |
| 1107 if(t==t1) { | |
| 1108 #if DEBUG_PARALLEL_ASSIGN | |
| 1109 printf("# circular dependency %d ty %d+%d sz %d\n",car(t1),ty,cadr(t1),sz); | |
| 1110 #endif | |
| 1111 return 1; | |
| 1112 } | |
| 1113 if ((s1=overrap(t1,sz,*source))) { | |
| 1114 /* another overrap start over */ | |
| 1115 return circular_dependency(t,s1,target,source); | |
| 1116 } | |
| 1117 } | |
| 1118 target0=cadr(target0); | |
| 1119 } | |
| 1120 return 0; | |
| 1121 } | |
| 1122 | |
| 55 | 1123 void |
| 1124 parallel_assign(int *target,int *source,int *processing,int *use) | |
| 48 | 1125 { |
| 56 | 1126 int t,s,sz,ty,target0,s1; |
| 48 | 1127 while(*target) { |
| 56 | 1128 target0=*target; |
| 1129 while(target0) { | |
| 1130 t=car(target0); s=cadddr(target0); | |
| 1131 sz=size(ty=caddr(target0)); | |
| 1132 if(car(t)==car(s) && cadr(t)==cadr(s)) { | |
| 1133 /*½ñ¤¹þ¤ßÀ褬¼«Ê¬¼«¿È*/ | |
| 1134 #if DEBUG_PARALLEL_ASSIGN | |
| 1135 printf("# remove same %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); | |
| 52 | 1136 #endif |
| 56 | 1137 remove_target(target,t,use); |
| 1138 /* Ç˲õ¤µ¤ì¤Æ¤Ïº¤¤ë¤Î¤Ç¡¢source list¤«¤é¤Ï½ü¤«¤Ê¤¤ */ | |
| 1139 } else if (!(s1=overrap(t,sz,*source))) { | |
| 1140 /* ½Å¤Ê¤Ã¤Æ¤Ê¤¤¤Î¤Ç°Â¿´¤·¤Æ½ñ¤¹þ¤á¤ë */ | |
| 1141 #if DEBUG_PARALLEL_ASSIGN | |
| 52 | 1142 printf("# normal assign %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); |
| 1143 #endif | |
| 56 | 1144 g_expr(assign_expr0(t,s,ty,ty)); |
| 1145 remove_target(target,t,use); remove0(source,s); | |
| 1146 } else { | |
| 1147 if(circular_dependency(t,s1,target,source)) { | |
| 1148 #if DEBUG_PARALLEL_ASSIGN | |
| 1149 printf("# saving %d ty %d+%d sz %d\n",car(t),ty,cadr(t),sz); | |
| 55 | 1150 #endif |
| 56 | 1151 remove_target(target,t,use); remove0(source,s); |
| 1152 save_target(t,s,target,use,sz,ty); | |
| 1153 } | |
| 1154 } | |
| 1155 target0=cadr(target0); | |
| 48 | 1156 } |
| 1157 } | |
| 1158 } | |
| 1159 | |
| 49 | 1160 void |
| 1161 remove0(int *parent,int e) | |
| 48 | 1162 { |
| 1163 int list; | |
| 49 | 1164 while ((list=*parent)) { |
| 48 | 1165 if (car(list)==e) { |
| 51 | 1166 *parent= cadr(list); return; |
| 1167 } else { | |
| 1168 parent=&cadr(list); | |
| 1169 } | |
| 1170 } | |
| 1171 } | |
| 1172 | |
| 1173 void | |
| 1174 remove0_all(int *parent,int e) | |
| 1175 { | |
| 1176 int list; | |
| 1177 while ((list=*parent)) { | |
| 1178 if (car(list)==e) { | |
| 48 | 1179 *parent= cadr(list); |
| 1180 } else { | |
| 1181 parent=&cadr(list); | |
| 1182 } | |
| 1183 } | |
| 1184 } | |
| 1185 | |
| 49 | 1186 int |
| 1187 is_simple(int e1) | |
| 1188 { | |
| 1189 return ( | |
| 1190 e1==CONST || e1==FNAME || e1==LVAR || e1==REGISTER || | |
| 50 | 1191 e1==GVAR || RGVAR || RLVAR || CRLVAR || CRGVAR |
| 49 | 1192 ); |
| 1193 } | |
| 1194 | |
| 1195 int | |
| 51 | 1196 is_same_type(int e1,int e2) |
| 49 | 1197 { |
| 51 | 1198 int ce1=car(e1); |
| 1199 int ce2=car(e2); | |
| 1200 return ( | |
| 1201 (ce1==LVAR && (ce2==RLVAR||ce2==CRLVAR)) | |
| 1202 || (ce2==LVAR && (ce1==RLVAR||ce1==CRLVAR)) | |
| 1203 || (ce1==GVAR && (ce2==RGVAR||ce2==CRGVAR)) | |
| 1204 || (ce2==GVAR && (ce1==RGVAR||ce1==CRGVAR)) | |
| 1205 ); | |
| 49 | 1206 } |
| 1207 | |
| 52 | 1208 int |
| 1209 is_memory(int e1) | |
| 1210 { | |
| 1211 int ce1=car(e1); | |
| 1212 return ( | |
| 1213 ce1==LVAR ||ce1==RLVAR||ce1==CRLVAR || | |
| 1214 ce1==GVAR ||ce1==RGVAR||ce1==CRGVAR || | |
| 1215 ce1==REGISTER | |
| 1216 ); | |
| 1217 } | |
| 1218 | |
| 48 | 1219 void |
| 1220 jump(int e1, int env) | |
| 1221 { | |
| 51 | 1222 int e2,e3,e4,sz,arg_size,ty,max_regs,regs; |
| 1223 int t0,s0; | |
| 48 | 1224 NMTBL *code0; |
| 1225 int target = 0; | |
| 1226 int source = 0; | |
| 1227 int processing = 0; | |
| 55 | 1228 int use = 0; |
| 48 | 1229 |
| 1230 /* ¤Þ¤º¡¢¥µ¥¤¥º¤ò·×»»¤·¤Ê¤¬¤é¡¢·è¤Þ¤Ã¤¿·Á¤ËÍ¡£ */ | |
| 51 | 1231 |
| 50 | 1232 arg_size = 0; regs = 0; max_regs = MAX_REGISTER_VAR-1; |
| 1233 for (e3 = reverse0(caddr(e1)); e3; e3 = cadr(e3)) { | |
| 49 | 1234 e2 = car(e3); sz = size(ty=caddr(e3)); |
| 53 | 1235 if (regs <= max_regs&&scalar(ty)) { |
| 51 | 1236 target=list4(list2(REGISTER,virtual((regs++)+REG_ESI)), |
| 1237 target,ty,e2); | |
| 48 | 1238 } else { |
| 53 | 1239 target=list4(list2(LVAR,0), |
| 51 | 1240 target,ty,e2); |
| 49 | 1241 arg_size += sz; |
| 48 | 1242 } |
| 56 | 1243 #if DEBUG_PARALLEL_ASSIGN |
| 52 | 1244 printf("# target %d ty %d+%d sz %d\n",car(car(target)),ty,cadr(car(target)),sz); |
| 1245 #endif | |
| 48 | 1246 } |
| 1247 | |
| 1248 /* disp ¤òÈô¤ÓÀè»÷¹ç¤ï¤»¤Æ½¤Àµ */ | |
| 50 | 1249 if (fnptr->sc==CODE) { |
| 1250 if (-arg_size<disp) disp = -arg_size; | |
| 53 | 1251 jump_offset = 0; |
| 50 | 1252 } else { |
| 1253 if (disp_offset-arg_size<disp) disp = disp_offset-arg_size; | |
| 53 | 1254 jump_offset = 0; |
| 50 | 1255 } |
| 48 | 1256 |
| 1257 /* Ê£»¨¤Ê¼°¤òÁ°¤â¤Ã¤Æ·×»»¤·¤Æ¤ª¤¯ */ | |
| 1258 /* ɬÍפʤé¶É½êÊÑ¿ô¤òÍѤ¤¤ë¡£ */ | |
| 1259 /* ¶É½êÊÑ¿ô¤Ø¤Î¥ª¥Õ¥»¥Ã¥È¤ò³Ð¤¨¤Æ¤ª¤¯ */ | |
| 1260 | |
| 51 | 1261 for (e2 = target; e2; e2 = cadr(e2)) { |
| 1262 t0=car(e2); s0=cadddr(e2); | |
| 52 | 1263 sz=size(ty=caddr(e2)); |
| 53 | 1264 if(car(t0)==LVAR) { |
| 1265 /* ¤³¤³¤Ç¡¢½ñ¹þÀ襢¥É¥ì¥¹¤ò·è¤á¤ë */ | |
| 1266 cadr(t0)=-arg_size+jump_offset; | |
| 1267 arg_size-=sz; | |
| 1268 } | |
| 51 | 1269 if (!is_simple(car(s0))) { |
| 52 | 1270 disp-=sz; |
| 53 | 1271 g_expr(assign_expr0((e4=list2(LVAR,disp)),s0,ty,ty)); |
| 51 | 1272 cadddr(e2)=e4; |
| 1273 s0=e4; | |
| 52 | 1274 } else if (is_same_type(t0,s0)) { |
| 1275 if(cadr(t0)==cadr(s0)) { | |
| 56 | 1276 #if DEBUG_PARALLEL_ASSIGN |
| 1277 printf("# remove same memory %d ty %d+%d sz %d\n",car(t0),ty,cadr(t0),sz); | |
| 1278 #endif | |
| 52 | 1279 /* we should check size also (but currently useless */ |
| 1280 remove0(&target,t0); | |
| 1281 /* still we have source to avoid overwrite */ | |
| 51 | 1282 } |
| 52 | 1283 } |
| 1284 if(is_memory(s0)) { | |
| 1285 source=list3(s0,source,sz); | |
| 56 | 1286 #if DEBUG_PARALLEL_ASSIGN |
| 52 | 1287 printf("# source %d ty %d+%d sz %d\n",car(car(source)),ty,cadr(car(source)),sz); |
| 51 | 1288 #endif |
| 48 | 1289 } |
| 1290 } | |
| 1291 | |
| 1292 /* compute jump address */ | |
| 1293 e2 = cadr(e1); | |
| 1294 if (car(e2) == FNAME) { | |
| 1295 code0=(NMTBL *)cadr(e2); | |
| 1296 if (code0->sc!=CODE) { | |
| 1297 error(TYERR); return; | |
| 1298 } | |
| 1299 } else { /* indirect */ | |
| 1300 g_expr(e2); | |
| 1301 emit_push(); | |
| 1302 } | |
| 50 | 1303 if (env) { |
| 1304 g_expr(env); | |
| 1305 emit_push(); | |
| 1306 } | |
| 48 | 1307 |
| 1308 /* ÊÂÎóÂåÆþ¤ò¼Â¹Ô */ | |
| 1309 | |
| 55 | 1310 parallel_assign(&target,&source,&processing,&use); |
| 1311 while (use) { | |
| 1312 free_register(caddr(use)); use=cadr(use); | |
| 1313 } | |
| 1314 if(target) error(-1); | |
| 48 | 1315 |
| 50 | 1316 if (env) { |
| 1317 /* change the frame pointer */ | |
| 1318 e3 = emit_pop(0); | |
| 1319 printf("\tmovl %s,%%ebp\n",register_name(e3,0)); | |
| 1320 emit_pop_free(e3); | |
| 1321 } else if (fnptr->sc==FUNCTION) { | |
| 1322 printf("\tlea %d(%%ebp),%%ebp\n",disp_offset); | |
| 1323 } | |
| 1324 | |
| 48 | 1325 /* shrink stack if necessary */ |
| 50 | 1326 /* |
| 1327 if (!env && -arg_size<disp) { | |
| 1328 printf("\tleal %d(%%ebp),%%esp\n",-arg_size); | |
| 1329 } Why we need this? | |
| 1330 */ | |
| 1331 | |
| 48 | 1332 if (car(e2) == FNAME) { |
| 1333 printf("\tjmp %s\n",code0->nm); | |
| 1334 } else { | |
| 1335 e2 = emit_pop(0); | |
| 1336 printf("\tjmp *%s\n",register_name(e2,0)); | |
| 1337 emit_pop_free(e2); | |
| 1338 } | |
| 1339 } | |
| 1340 | |
| 0 | 1341 void |
| 1342 machinop(int e1) | |
| 1343 { | |
| 1344 int e2,e3,op; | |
| 1345 | |
| 1346 e2 = cadr(e1); | |
| 1347 op = car(e1); | |
| 1348 e3 = caddr(e1); | |
| 1349 g_expr(e3); | |
| 1350 emit_push(); | |
| 1351 g_expr(e2); | |
| 43 | 1352 tosop(car(e1),(e2=pop_register())); |
| 1353 emit_pop_free(e2); | |
| 42 | 1354 regv[creg]=1; |
| 0 | 1355 return; |
| 1356 } | |
| 1357 | |
| 1358 | |
| 1359 void | |
| 1360 rindirect(int e1) /* *(p +5 ) */ | |
| 1361 | |
| 1362 { | |
| 1363 char *op; | |
| 1364 int e2,e3,byte; | |
| 1365 | |
| 1366 op = ((byte = (car(e1) == CRINDIRECT)) ? "movsbl" : "movl"); | |
| 1367 e3 = cadr(e2 = cadr(e1)); | |
| 1368 g_expr(e2); | |
| 21 | 1369 printf("\t%s (%s),%s\n",op,register_name(creg,0),register_name(creg,0)); |
| 0 | 1370 } |
| 1371 | |
| 1372 void | |
| 1373 sassign(int e1) | |
| 1374 { | |
| 38 | 1375 int e2,e3,e4,sz,xreg; |
| 0 | 1376 |
| 18 | 1377 /* structure assignment */ |
| 37 | 1378 e2 = cadr(e1); /* pointer variable to the struct */ |
| 1379 e3 = cadr(e2); /* offset of the variable (distination) */ | |
| 39 | 1380 e4 = caddr(e1); /* right value (source) */ |
| 37 | 1381 sz = cadddr(e1); /* size of struct or union */ |
| 0 | 1382 g_expr(e4); |
| 1383 emit_push(); | |
| 1384 g_expr(e2); | |
| 38 | 1385 xreg = emit_pop(0); |
| 47 | 1386 emit_copy(xreg,creg,sz,0,1); |
| 42 | 1387 emit_pop_free(xreg); |
| 0 | 1388 return; |
| 1389 } | |
| 1390 | |
| 1391 void | |
| 1392 assign(int e1) | |
| 1393 { | |
| 1394 char *op; | |
| 1395 int e2,e3,e4,byte; | |
| 1396 | |
| 1397 op = ((byte=(car(e1) == CASS))? "movb" : "movl"); | |
| 1398 /* e2=e4 */ | |
| 1399 e2 = cadr(e1); | |
| 1400 e3 = cadr(e2); | |
| 1401 e4 = caddr(e1); | |
| 1402 switch(car(e2)) { | |
| 1403 case GVAR: /* i=3 */ | |
| 1404 g_expr(e4); | |
| 1405 if (byte) use_data_reg(creg,1); | |
| 18 | 1406 printf("\t%s %s,%s\n",op,register_name(creg,byte),(char *)caddr(e2)); |
| 0 | 1407 return; |
| 1408 case LVAR: | |
| 1409 g_expr(e4); | |
| 1410 if (byte) use_data_reg(creg,1); | |
| 18 | 1411 printf("\t%s %s,%d(%%ebp)\n",op,register_name(creg,byte),lvar(cadr(e2))); |
| 0 | 1412 return; |
| 1413 case REGISTER: | |
| 1414 g_expr(e4); | |
| 1415 if (creg!=cadr(e2)) | |
| 23 | 1416 printf("\tmovl %s,%s\n",register_name(creg,0),register_name(cadr(e2),0)); |
| 0 | 1417 return; |
| 1418 } | |
| 23 | 1419 g_expr(e2); |
| 0 | 1420 emit_push(); |
| 23 | 1421 use_data_reg(creg,0); |
| 1422 g_expr(e4); | |
| 0 | 1423 if (byte) use_data_reg(creg,1); |
| 23 | 1424 e2 = emit_pop(0); |
| 1425 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(e2,0)); | |
| 42 | 1426 emit_pop_free(e2); |
| 1427 regv[creg]=1; | |
| 0 | 1428 return; |
| 1429 } | |
| 1430 | |
| 1431 void | |
| 1432 assop(int e1) | |
| 1433 { | |
| 43 | 1434 int e2,e3,byte,op,reg; |
| 0 | 1435 char *xrn; |
| 42 | 1436 int xreg,edx; |
| 0 | 1437 |
| 1438 /* e2 op= e3 */ | |
| 1439 byte = (car(e1) == CASSOP); | |
| 1440 e2 = cadr(e1); | |
| 1441 if (car(e2)==INDIRECT) e2=cadr(e2); | |
| 1442 e3 = caddr(e1); | |
| 1443 op = cadddr(e1); | |
| 1444 | |
| 1445 g_expr(e3); | |
| 1446 if (car(e2)==REGISTER) { | |
| 43 | 1447 xreg = creg; |
| 1448 creg = reg = cadr(e2); | |
| 1449 tosop(op,xreg); | |
| 1450 creg = xreg; | |
| 1451 printf("\tmovl %s,%s\n",register_name(reg,0),register_name(creg,0)); | |
| 42 | 1452 regv[creg]=1; |
| 0 | 1453 return; |
| 1454 } | |
| 43 | 1455 emit_push(); |
| 0 | 1456 g_expr(e2); |
| 42 | 1457 edx = edx_setup(); |
| 18 | 1458 xrn = register_name(xreg = emit_pop(0),0); /* pop e3 value */ |
| 42 | 1459 regv[xreg]=regs[xreg]=1; |
| 1460 printf("\tmovl %s,%s # assop \n",register_name(creg,0),register_name(edx,0)); | |
| 1461 regv[edx]=1; | |
| 1462 ld_indexx(byte,0,edx); | |
| 43 | 1463 tosop(op,xreg); |
| 42 | 1464 printf("\t%s %s,(%s)\n",byte ? "movb" : "movl",register_name(creg,byte),register_name(edx,0)); |
| 1465 edx_cleanup(); | |
| 1466 emit_pop_free(xreg); | |
| 1467 regv[creg]=1; | |
| 0 | 1468 return; |
| 1469 } | |
| 1470 | |
| 1471 | |
| 1472 void | |
| 43 | 1473 tosop(int op,int oreg) |
| 0 | 1474 { |
| 43 | 1475 int dx; |
| 18 | 1476 char *orn,*crn; |
| 0 | 1477 |
| 1478 switch(op) { | |
| 1479 case LSHIFT: | |
| 1480 case ULSHIFT: | |
| 1481 shift("sall",oreg); | |
| 1482 return; | |
| 1483 case RSHIFT: | |
| 1484 shift("sarl",oreg); | |
| 1485 return; | |
| 1486 case URSHIFT: | |
| 1487 shift("shrl",oreg); | |
| 1488 return; | |
| 1489 } | |
| 1490 if(oreg==-1) { | |
| 18 | 1491 printf("\tpopl %s\n",register_name(dreg,0)); |
| 0 | 1492 oreg = dreg; |
| 42 | 1493 regv[dreg]=1; |
| 0 | 1494 } |
| 42 | 1495 regv[oreg]=1; regs[oreg]=1; |
| 18 | 1496 orn = register_name(oreg,0); |
| 1497 crn = register_name(creg,0); | |
| 0 | 1498 switch(op) { |
| 1499 case ADD: | |
| 1500 printf("\taddl %s,%s\n",orn,crn); | |
| 41 | 1501 break; |
| 0 | 1502 case SUB: |
| 1503 printf("\tsubl %s,%s\n",orn,crn); | |
| 41 | 1504 break; |
| 0 | 1505 case BAND: |
| 1506 printf("\tandl %s,%s\n",orn,crn); | |
| 41 | 1507 break; |
| 0 | 1508 case EOR: |
| 1509 printf("\txorl %s,%s\n",orn,crn); | |
| 41 | 1510 break; |
| 0 | 1511 case BOR: |
| 1512 printf("\torl %s,%s\n",orn,crn); | |
| 41 | 1513 break; |
| 0 | 1514 case MUL: |
| 1515 case UMUL: | |
| 1516 printf("\t%s %s,%s\n","imull",orn,crn); | |
| 41 | 1517 break; |
| 0 | 1518 case DIV: |
| 1519 case UDIV: | |
| 42 | 1520 use_register(creg,REG_EAX,1); |
| 1521 edx_setup(); | |
| 1522 orn = register_name(oreg,0); | |
| 0 | 1523 if (op==DIV) |
| 1524 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1525 else | |
| 1526 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1527 edx_cleanup(); |
| 41 | 1528 break; |
| 0 | 1529 case MOD: |
| 1530 case UMOD: | |
| 42 | 1531 use_register(creg,REG_EAX,1); |
| 1532 edx_setup(); | |
| 1533 orn = register_name(oreg,0); | |
| 0 | 1534 if (op==DIV) |
| 1535 printf("\tcltd\n\tdivl %s\n",orn); | |
| 1536 else | |
| 1537 printf("\txor %%edx,%%edx\n\tidivl %s\n",orn); | |
| 42 | 1538 dx = virtual(REG_EDX); |
| 1539 if (dx!=creg) { | |
| 1540 rname[dx]=rname[creg]; | |
| 1541 rname[creg]=REG_EDX; | |
| 1542 } | |
| 1543 edx_cleanup(); | |
| 41 | 1544 break; |
| 0 | 1545 } |
| 42 | 1546 if (oreg!=dreg&&oreg>=0) |
| 1547 free_register(oreg); | |
| 0 | 1548 } |
| 1549 | |
| 42 | 1550 static int edx_stack=0; |
| 0 | 1551 |
| 42 | 1552 int |
| 1553 edx_setup() | |
| 0 | 1554 { |
| 42 | 1555 int edx_save; |
| 1556 /* make real EDX register empty */ | |
| 1557 if (free_register_count()<1) { | |
| 1558 for(edx_save = 0;edx_save==dreg||edx_save==creg;edx_save++); | |
| 1559 printf("\tpushl %s\n",register_name(edx_save,0)); | |
| 1560 edx_stack = list3(edx_save,edx_stack,0); | |
| 1561 } else { | |
| 1562 edx_save = get_register(); | |
| 1563 edx_stack = list3(edx_save,edx_stack,1); | |
| 0 | 1564 } |
| 42 | 1565 regv[edx_save]=0; |
| 1566 use_register(edx_save,REG_EDX,0); | |
| 1567 return edx_save; | |
| 0 | 1568 } |
| 1569 | |
| 18 | 1570 |
| 1571 void | |
| 42 | 1572 edx_cleanup() |
| 0 | 1573 { |
| 42 | 1574 if (caddr(edx_stack)==0) { |
| 1575 printf("\tpopl %s\n",register_name(car(edx_stack),0)); | |
| 1576 } else | |
| 1577 free_register(car(edx_stack)); | |
| 1578 edx_stack = cadr(edx_stack); | |
| 0 | 1579 } |
| 1580 | |
| 1581 void | |
| 1582 shift(char *op, int reg) | |
| 1583 { | |
| 1584 if (reg>=0) { | |
| 42 | 1585 use_register(reg,REG_ECX,1); |
| 0 | 1586 } else { |
| 1587 use_register(dreg,REG_ECX,0); | |
| 1588 printf("\tpopl %%ecx\n"); | |
| 1589 } | |
| 18 | 1590 printf("\t%s %%cl,%s\n",op,register_name(creg,0)); |
| 0 | 1591 } |
| 1592 | |
| 1593 void | |
| 18 | 1594 ld_indexx(int byte, int n, int xreg) |
| 0 | 1595 { |
| 1596 char *op; | |
| 1597 | |
| 1598 op = byte ? "movsbl" : "movl"; | |
| 1599 if (n) | |
| 18 | 1600 printf("\t%s %d(%s),%s\n",op,n,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1601 else |
| 18 | 1602 printf("\t%s (%s),%s\n",op,register_name(xreg,0),register_name(creg,byte)); |
| 0 | 1603 } |
| 1604 | |
| 18 | 1605 /* |
| 0 | 1606 void |
| 18 | 1607 st_indexx(int byte, int n, int xreg) |
| 0 | 1608 { |
| 1609 char *op; | |
| 1610 | |
| 1611 op = byte ? "movb" : "movl"; | |
| 1612 if (n) | |
| 18 | 1613 printf("\t%s %s,%d(%s)\n",op,register_name(creg,byte),n,register_name(xreg,0)); |
| 0 | 1614 else |
| 18 | 1615 printf("\t%s %s,(%s)\n",op,register_name(creg,byte),register_name(xreg,0)); |
| 0 | 1616 } |
| 1617 | |
| 1618 void | |
| 1619 indexy(char *op, char *gvar) | |
| 1620 { | |
| 18 | 1621 printf("\t%s %s,%s\n",op,register_name(creg,0),gvar); |
| 0 | 1622 } |
| 18 | 1623 */ |
| 0 | 1624 |
| 1625 void | |
| 1626 cmpdimm(int e, int csreg) | |
| 1627 { | |
| 1628 /* used in dosiwtch() */ | |
| 1629 use_register(creg,csreg,0); | |
| 18 | 1630 printf("\tcmpl $%d,%s\n",e,register_name(creg,0)); |
| 0 | 1631 } |
| 1632 | |
| 1633 void | |
| 1634 opening(char *filename) | |
| 1635 { | |
| 1636 printf("\t.file \"%s\"\n",filename); | |
| 1637 printf("\t.version\t\"01.01\"\n"); | |
| 1638 printf("gcc2_compiled.:\n"); | |
| 1639 printf(".text\n"); | |
| 1640 emit_init(); | |
| 1641 } | |
| 1642 | |
| 1643 void | |
| 1644 closing(void) | |
| 1645 { | |
| 1646 global_table(); | |
| 1647 printf("\t.ident \"Micro-C compiled\"\n"); | |
| 1648 } | |
| 1649 | |
| 1650 void | |
| 1651 rexpr(int e1, int l1, char *s) | |
| 1652 { | |
| 1653 g_expr(list3(SUB,cadr(e1),caddr(e1))); | |
| 1654 printf("\tj%s\t_%d\n",s,l1); | |
| 1655 } | |
| 1656 | |
| 1657 void | |
| 1658 jcond(int l, char cond) | |
| 1659 { | |
| 1660 printf("\tj%s\t_%d\n",cond?"ne":"e",l); | |
| 1661 } | |
| 1662 | |
| 1663 void | |
| 1664 jmp(int l) | |
| 1665 { | |
| 1666 control=0; | |
| 1667 printf("\tjmp\t_%d\n",l); | |
| 1668 /* align? */ | |
| 42 | 1669 /* |
| 1670 this is not allowed because of ? operator | |
| 1671 regv[creg]=regv[dreg]=0; | |
| 1672 use_register(creg,REG_EAX,0); | |
| 1673 use_register(dreg,REG_EBX,0); | |
| 1674 */ | |
| 0 | 1675 } |
| 1676 | |
| 1677 int | |
| 1678 fwdlabel(void) | |
| 1679 { | |
| 1680 return labelno++; | |
| 1681 } | |
| 1682 | |
| 1683 void | |
| 1684 fwddef(int l) | |
| 1685 { | |
| 1686 control=1; | |
| 1687 printf("_%d:\n",l); | |
| 1688 } | |
| 1689 | |
| 1690 int | |
| 1691 backdef(void) | |
| 1692 { | |
| 1693 control=1; | |
| 1694 printf("_%d:\n",labelno); | |
| 1695 return labelno++; | |
| 1696 } | |
| 1697 | |
| 1698 void | |
| 1699 def_label(int cslabel, int dlabel) | |
| 1700 { | |
| 1701 int fl; | |
| 1702 | |
| 1703 fl = 0; | |
| 1704 if (control) { | |
| 1705 jmp(fl=fwdlabel()); | |
| 1706 } | |
| 1707 fwddef(cslabel); | |
| 1708 if (dlabel) | |
| 1709 jmp(dlabel); | |
| 1710 if (fl) { | |
| 1711 fwddef(fl); | |
| 1712 } | |
| 1713 } | |
| 1714 | |
| 1715 void | |
| 1716 gen_comment(char *s) | |
| 1717 { | |
| 21 | 1718 printf("## %s",s); |
| 0 | 1719 } |
| 1720 | |
| 1721 void | |
| 1722 gen_source(char *s) | |
| 1723 { | |
| 1724 printf("%s",s); | |
| 1725 } | |
| 1726 | |
| 1727 void | |
| 1728 code_enter(char *name) | |
| 1729 { | |
| 1730 printf("\t.align 4\n"); | |
| 1731 if (stmode!=STATIC) | |
| 1732 printf(".globl %s\n",name); | |
| 1733 printf("\t.type\t%s,@function\n",name); | |
| 1734 printf("%s:\n",name); | |
| 1735 } | |
| 1736 | |
| 1737 void | |
| 50 | 1738 code_enter1(int args) |
| 0 | 1739 { |
| 36 | 1740 code_disp_label=fwdlabel(); |
| 50 | 1741 printf("\tlea _%d(%%ebp),%%esp\n",code_disp_label); |
| 53 | 1742 |
| 21 | 1743 printf("## args %d disp %d code_arg_offset=%d code_disp_offset=%d\n",args,disp,code_arg_offset,code_disp_offset); |
| 0 | 1744 } |
| 1745 | |
| 1746 void | |
| 50 | 1747 code_leave(char *name) |
| 0 | 1748 { |
| 53 | 1749 printf("\t.set _%d,%d\n",code_disp_label,disp+code_disp_offset); |
| 0 | 1750 printf("_%d:\n",labelno); |
| 1751 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1752 local_table(); |
| 0 | 1753 labelno++; |
| 55 | 1754 free_all_register(); |
| 0 | 1755 } |
| 1756 | |
| 1757 void | |
| 1758 enter(char *name) | |
| 1759 { | |
| 1760 printf("\t.align 2\n"); | |
| 1761 if (stmode!=STATIC) | |
| 1762 printf(".globl %s\n",name); | |
| 1763 printf("%s:\n",name); | |
| 1764 printf("\t.type\t%s,@function\n",name); | |
| 1765 printf("\tpushl %%ebp\n"); | |
| 1766 printf("\tmovl %%esp,%%ebp\n"); | |
| 1767 printf("\tpushl %%ebx\n"); | |
| 24 | 1768 printf("\tpushl %%esi\n"); |
| 1769 printf("\tpushl %%edi\n"); | |
| 0 | 1770 } |
| 1771 | |
| 1772 void | |
| 50 | 1773 enter1() |
| 0 | 1774 { |
| 36 | 1775 func_disp_label=fwdlabel(); |
| 50 | 1776 printf("\tlea _%d(%%ebp),%%esp\n",func_disp_label); |
| 36 | 1777 /* if(disp) printf("\tsubl $%d,%%esp\n",-disp); */ |
| 0 | 1778 } |
| 1779 | |
| 1780 void | |
| 50 | 1781 leave(int control, char *name) |
| 0 | 1782 { |
| 1783 if (control) | |
| 1784 use_register(creg,REG_EAX,1); | |
| 1785 if (retcont) { | |
| 1786 if (control) | |
| 1787 jmp(retlabel); | |
| 1788 fwddef(retcont); | |
| 1789 use_register(creg,REG_EAX,0); | |
| 18 | 1790 printf("\tmovl %s,%s\n",reg_name[REG_ESI],register_name(creg,0)); |
| 0 | 1791 /* printf("\tleave\n"); */ |
| 1792 } | |
| 1793 fwddef(retlabel); | |
| 42 | 1794 /* use_register(creg,REG_EAX,0); too late */ |
| 52 | 1795 /* if(disp) printf("\taddl $%d,%%esp\n",-disp); */ |
| 0 | 1796 printf("\tlea %d(%%ebp),%%esp\n",disp_offset); |
| 24 | 1797 printf("\tpopl %%edi\n"); |
| 1798 printf("\tpopl %%esi\n"); | |
| 0 | 1799 printf("\tpopl %%ebx\n"); |
| 1800 printf("\tleave\n"); | |
| 1801 printf("\tret\n"); | |
| 52 | 1802 printf("\t.set _%d,%d\n",func_disp_label,disp+disp_offset); |
| 0 | 1803 printf("_%d:\n",labelno); |
| 1804 printf("\t.size\t%s,_%d-%s\n",name,labelno,name); | |
| 12 | 1805 local_table(); |
| 0 | 1806 labelno++; |
| 55 | 1807 free_all_register(); |
| 0 | 1808 } |
| 1809 | |
| 1810 | |
| 1811 void | |
| 1812 ret(void) | |
| 1813 { | |
| 1814 use_register(creg,REG_EAX,1); | |
| 1815 jmp(retlabel); | |
| 1816 } | |
| 1817 | |
| 1818 void | |
| 1819 gen_gdecl(char *n, int gpc) | |
| 1820 { | |
| 1821 /* | |
| 1822 if (stmode!=STATIC) | |
| 1823 printf(".globl %s\n",n); | |
| 1824 */ | |
| 1825 } | |
| 1826 | |
| 1827 void | |
| 1828 align(int t) | |
| 1829 { | |
| 1830 if (t!=CHAR) { | |
| 1831 if (data_alignment & 1) | |
| 1832 printf("\t.align 2\n"); | |
| 1833 data_alignment = 0; | |
| 1834 } | |
| 1835 } | |
| 1836 | |
| 1837 void | |
| 1838 emit_data(int e, int t, NMTBL *n) | |
| 1839 { | |
| 1840 int l; | |
| 1841 char *name; | |
| 1842 name = n->nm; | |
| 13 | 1843 if(mode!=GDECL) { |
| 1844 error(-1); return; | |
| 1845 } | |
| 1846 if (n->dsp != -1) { | |
| 1847 n->dsp = -1; /* initiallized flag */ | |
| 1848 printf(".globl\t%s\n",name); | |
| 1849 data_mode(name); | |
| 1850 align(t); | |
| 1851 printf("%s:\n",name); | |
| 1852 } else { | |
| 1853 data_mode(0); | |
| 1854 } | |
| 1855 if(car(e)==CONST) { | |
| 1856 if (t==CHAR) { | |
| 1857 printf("\t.byte %d\n",cadr(e)); | |
| 1858 if (data_alignment>0) | |
| 1859 data_alignment++; | |
| 1860 gpc += 1; | |
| 0 | 1861 } else { |
| 13 | 1862 printf("\t.long %d\n",cadr(e)); |
| 3 | 1863 gpc += size_of_int; |
| 13 | 1864 } |
| 1865 } else if(t!=CHAR) { | |
| 1866 gpc += size_of_int; | |
| 1867 if(car(e)==ADDRESS&&car(cadr(e))==GVAR) { | |
| 18 | 1868 printf("\t.long %s\n",(char *)caddr(cadr(e))); |
| 13 | 1869 } else if(car(e)==FNAME) { |
| 1870 printf("\t.long %s\n",((NMTBL *)cadr(e))->nm); | |
| 1871 } else if(car(e)==STRING) { | |
| 1872 if (car(n->ty)!=ARRAY || cadr(n->ty)!=CHAR) { | |
| 1873 l = fwdlabel(); | |
| 1874 printf("\t.long _%d\n",l); | |
| 1875 printf(".section\t.rodata\n"); | |
| 1876 printf("_%d:\n",l); | |
| 1877 output_mode = RODATA_EMIT_MODE; | |
| 1878 } | |
| 1879 ascii((char *)cadr(e)); | |
| 1880 } else error(TYERR); | |
| 0 | 1881 } |
| 1882 } | |
| 1883 | |
| 1884 void | |
| 1885 emit_data_closing(NMTBL *n) | |
| 1886 { | |
| 1887 int lb; | |
| 18 | 1888 if (mode==GDECL) { |
| 0 | 1889 data_mode(0); |
| 1890 lb=fwdlabel(); | |
| 1891 printf("_%d:\n",lb); | |
| 1892 printf("\t.size\t%s,_%d-%s\n",n->nm,lb,n->nm); | |
| 1893 } | |
| 1894 } | |
| 1895 | |
| 1896 void | |
| 1897 global_table(void) | |
| 1898 { | |
| 1899 NMTBL *n; | |
| 12 | 1900 int init; |
| 1901 init=0; | |
| 0 | 1902 for(n=ntable;n < &ntable[GSYMS];n++) { |
| 1903 if (n->sc == GVAR && n->dsp != -1) { | |
| 1904 /* n->dsp = -1 means initialized global */ | |
| 12 | 1905 if (init==0) { |
| 1906 data_mode(0); | |
| 1907 init=1; | |
| 1908 } | |
| 0 | 1909 printf(".comm %s,%d\n",n->nm,size(n->ty)); |
| 1910 } | |
| 1911 } | |
| 1912 } | |
| 1913 | |
| 1914 void | |
| 1915 local_table(void) | |
| 1916 { | |
| 1917 NMTBL *n; | |
| 12 | 1918 int init; |
| 1919 init=0; | |
| 0 | 1920 /* static local variables */ |
| 1921 for(n=ntable+GSYMS;n < &ntable[GSYMS+LSYMS];n++) { | |
| 1922 if (n->sc == GVAR) { | |
| 12 | 1923 if (init==0) { |
| 1924 data_mode(0); | |
| 1925 init=1; | |
| 1926 } | |
| 0 | 1927 printf(".lcomm %s,%d\n",n->nm,size(n->ty)); |
| 1928 } | |
| 1929 } | |
| 1930 } | |
| 1931 | |
| 1932 void | |
| 1933 text_mode(void) | |
| 1934 { | |
| 1935 if (output_mode!=TEXT_EMIT_MODE) { | |
| 1936 printf(".text\n"); | |
| 1937 printf("\t.align 2\n"); | |
| 1938 output_mode = TEXT_EMIT_MODE; | |
| 1939 } | |
| 1940 } | |
| 1941 | |
| 1942 void | |
| 1943 data_mode(char *name) | |
| 1944 { | |
| 1945 if (output_mode!=DATA_EMIT_MODE) { | |
| 1946 printf(".data\n"); | |
| 1947 output_mode = DATA_EMIT_MODE; | |
| 1948 } | |
| 1949 if (name) | |
| 1950 printf("\t.type\t%s,@object\n",name); | |
| 1951 } | |
| 1952 | |
| 1953 int | |
| 1954 lvar(int l) | |
| 1955 { | |
| 50 | 1956 if (fnptr->sc==CODE) { |
| 53 | 1957 return l+code_disp_offset; |
| 50 | 1958 } else if (l<0) { |
| 1959 return l+disp_offset; | |
| 0 | 1960 } else { |
| 50 | 1961 return l+arg_offset; |
| 0 | 1962 } |
| 1963 } | |
| 1964 | |
| 50 | 1965 |
| 0 | 1966 /* end */ |