1 #include "../cc/cc.h" 2 #include "../8c/8.out.h" 3 4 /* 5 * 8c/386 6 * Intel 386 7 */ 8 #define SZ_CHAR 1 9 #define SZ_SHORT 2 10 #define SZ_INT 4 11 #define SZ_LONG 4 12 #define SZ_IND 4 13 #define SZ_FLOAT 4 14 #define SZ_VLONG 8 15 #define SZ_DOUBLE 8 16 #define FNX 100 17 18 typedef struct Adr Adr; 19 typedef struct Prog Prog; 20 typedef struct Case Case; 21 typedef struct C1 C1; 22 typedef struct Var Var; 23 typedef struct Reg Reg; 24 typedef struct Rgn Rgn; 25 typedef struct Renv Renv; 26 27 EXTERN struct 28 { 29 Node* regtree; 30 Node* basetree; 31 short scale; 32 short reg; 33 short ptr; 34 } idx; 35 36 struct Adr 37 { 38 long offset; 39 double dval; 40 char sval[NSNAME]; 41 42 Sym* sym; 43 uchar type; 44 uchar index; 45 uchar etype; 46 uchar scale; /* doubles as width in DATA op */ 47 }; 48 #define A ((Adr*)0) 49 50 #define INDEXED 9 51 struct Prog 52 { 53 Adr from; 54 Adr to; 55 Prog* link; 56 long lineno; 57 short as; 58 }; 59 #define P ((Prog*)0) 60 61 struct Case 62 { 63 Case* link; 64 vlong val; 65 long label; 66 char def; 67 char isv; 68 }; 69 #define C ((Case*)0) 70 71 struct C1 72 { 73 vlong val; 74 long label; 75 }; 76 77 struct Var 78 { 79 long offset; 80 Sym* sym; 81 char name; 82 char etype; 83 }; 84 85 struct Reg 86 { 87 long pc; 88 long rpo; /* reverse post ordering */ 89 90 Bits set; 91 Bits use1; 92 Bits use2; 93 94 Bits refbehind; 95 Bits refahead; 96 Bits calbehind; 97 Bits calahead; 98 Bits regdiff; 99 Bits act; 100 101 long regu; 102 long loop; /* could be shorter */ 103 104 Reg* log5; 105 long active; 106 107 Reg* p1; 108 Reg* p2; 109 Reg* p2link; 110 Reg* s1; 111 Reg* s2; 112 Reg* link; 113 Prog* prog; 114 }; 115 #define R ((Reg*)0) 116 117 struct Renv 118 { 119 int safe; 120 Node base; 121 Node* saved; 122 Node* scope; 123 }; 124 125 #define NRGN 600 126 struct Rgn 127 { 128 Reg* enter; 129 short cost; 130 short varno; 131 short regno; 132 }; 133 134 EXTERN long breakpc; 135 EXTERN long nbreak; 136 EXTERN Case* cases; 137 EXTERN Node constnode; 138 EXTERN Node fconstnode; 139 EXTERN long continpc; 140 EXTERN long curarg; 141 EXTERN long cursafe; 142 EXTERN Prog* firstp; 143 EXTERN Prog* lastp; 144 EXTERN long maxargsafe; 145 EXTERN int mnstring; 146 EXTERN Node* nodrat; 147 EXTERN Node* nodret; 148 EXTERN Node* nodsafe; 149 EXTERN long nrathole; 150 EXTERN long nstring; 151 EXTERN Prog* p; 152 EXTERN long pc; 153 EXTERN Node regnode; 154 EXTERN Node fregnode0; 155 EXTERN Node fregnode1; 156 EXTERN char string[NSNAME]; 157 EXTERN Sym* symrathole; 158 EXTERN Node znode; 159 EXTERN Prog zprog; 160 EXTERN int reg[D_NONE]; 161 EXTERN long exregoffset; 162 EXTERN long exfregoffset; 163 164 #define BLOAD(r) band(bnot(r->refbehind), r->refahead) 165 #define BSTORE(r) band(bnot(r->calbehind), r->calahead) 166 #define LOAD(r) (~r->refbehind.b[z] & r->refahead.b[z]) 167 #define STORE(r) (~r->calbehind.b[z] & r->calahead.b[z]) 168 169 #define bset(a,n) ((a).b[(n)/32]&(1L<<(n)%32)) 170 171 #define CLOAD 5 172 #define CREF 5 173 #define CINF 1000 174 #define LOOP 3 175 176 EXTERN Rgn region[NRGN]; 177 EXTERN Rgn* rgp; 178 EXTERN int nregion; 179 EXTERN int nvar; 180 181 EXTERN Bits externs; 182 EXTERN Bits params; 183 EXTERN Bits consts; 184 EXTERN Bits addrs; 185 186 EXTERN long regbits; 187 EXTERN long exregbits; 188 189 EXTERN int change; 190 EXTERN int suppress; 191 192 EXTERN Reg* firstr; 193 EXTERN Reg* lastr; 194 EXTERN Reg zreg; 195 EXTERN Reg* freer; 196 EXTERN Var var[NVAR]; 197 EXTERN long* idom; 198 EXTERN Reg** rpo2r; 199 EXTERN long maxnr; 200 201 extern char* anames[]; 202 203 /* 204 * sgen.c 205 */ 206 void codgen(Node*, Node*); 207 void gen(Node*); 208 void noretval(int); 209 void usedset(Node*, int); 210 void xcom(Node*); 211 void indx(Node*); 212 int bcomplex(Node*, Node*); 213 214 /* 215 * cgen.c 216 */ 217 void zeroregm(Node*); 218 void cgen(Node*, Node*); 219 void reglcgen(Node*, Node*, Node*); 220 void lcgen(Node*, Node*); 221 void bcgen(Node*, int); 222 void boolgen(Node*, int, Node*); 223 void sugen(Node*, Node*, long); 224 int needreg(Node*, int); 225 226 /* 227 * cgen64.c 228 */ 229 int vaddr(Node*, int); 230 void loadpair(Node*, Node*); 231 int cgen64(Node*, Node*); 232 void testv(Node*, int); 233 234 /* 235 * txt.c 236 */ 237 void ginit(void); 238 void gclean(void); 239 void nextpc(void); 240 void gargs(Node*, Node*, Node*); 241 void garg1(Node*, Node*, Node*, int, Node**); 242 Node* nodconst(long); 243 int nareg(int); 244 Node* nodfconst(double); 245 int nodreg(Node*, Node*, int); 246 int isreg(Node*, int); 247 void regret(Node*, Node*); 248 void regalloc(Node*, Node*, Node*); 249 void regfree(Node*); 250 void regialloc(Node*, Node*, Node*); 251 void regsalloc(Node*, Node*); 252 void regaalloc1(Node*, Node*); 253 void regaalloc(Node*, Node*); 254 void regind(Node*, Node*); 255 void gprep(Node*, Node*); 256 void naddr(Node*, Adr*); 257 void gmove(Node*, Node*); 258 void gins(int a, Node*, Node*); 259 void fgopcode(int, Node*, Node*, int, int); 260 void gopcode(int, Type*, Node*, Node*); 261 int samaddr(Node*, Node*); 262 void gbranch(int); 263 void patch(Prog*, long); 264 int sconst(Node*); 265 void gpseudo(int, Sym*, Node*); 266 267 /* 268 * swt.c 269 */ 270 int swcmp(const void*, const void*); 271 void doswit(Node*); 272 void swit1(C1*, int, long, Node*); 273 void casf(void); 274 void bitload(Node*, Node*, Node*, Node*, Node*); 275 void bitstore(Node*, Node*, Node*, Node*, Node*); 276 long outstring(char*, long); 277 void nullwarn(Node*, Node*); 278 void gextern(Sym*, Node*, long, long); 279 void outcode(void); 280 void ieeedtod(Ieee*, double); 281 282 /* 283 * list 284 */ 285 void listinit(void); 286 int Pconv(Fmt*); 287 int Aconv(Fmt*); 288 int Dconv(Fmt*); 289 int Sconv(Fmt*); 290 int Rconv(Fmt*); 291 int Xconv(Fmt*); 292 int Bconv(Fmt*); 293 294 /* 295 * reg.c 296 */ 297 Reg* rega(void); 298 int rcmp(const void*, const void*); 299 void regopt(Prog*); 300 void addmove(Reg*, int, int, int); 301 Bits mkvar(Reg*, Adr*, int); 302 void prop(Reg*, Bits, Bits); 303 void loopit(Reg*, long); 304 void synch(Reg*, Bits); 305 ulong allreg(ulong, Rgn*); 306 void paint1(Reg*, int); 307 ulong paint2(Reg*, int); 308 void paint3(Reg*, int, long, int); 309 void addreg(Adr*, int); 310 311 /* 312 * peep.c 313 */ 314 void peep(void); 315 void excise(Reg*); 316 Reg* uniqp(Reg*); 317 Reg* uniqs(Reg*); 318 int regtyp(Adr*); 319 int anyvar(Adr*); 320 int subprop(Reg*); 321 int copyprop(Reg*); 322 int copy1(Adr*, Adr*, Reg*, int); 323 int copyu(Prog*, Adr*, Adr*); 324 325 int copyas(Adr*, Adr*); 326 int copyau(Adr*, Adr*); 327 int copysub(Adr*, Adr*, Adr*, int); 328 int copysub1(Prog*, Adr*, Adr*, int); 329 330 long RtoB(int); 331 long FtoB(int); 332 int BtoR(long); 333 int BtoF(long); 334 335 #define D_HI D_NONE 336 #define D_LO D_NONE 337 338 /* 339 * com64 340 */ 341 int cond(int); 342 int com64(Node*); 343 void com64init(void); 344 void bool64(Node*); 345 long lo64v(Node*); 346 long hi64v(Node*); 347 Node* lo64(Node*); 348 Node* hi64(Node*); 349 350 /* 351 * div/mul 352 */ 353 void sdivgen(Node*, Node*, Node*, Node*); 354 void udivgen(Node*, Node*, Node*, Node*); 355 void sdiv2(long, int, Node*, Node*); 356 void smod2(long, int, Node*, Node*); 357 void mulgen(Type*, Node*, Node*); 358 void genmuladd(Node*, Node*, int, Node*); 359 void shiftit(Type*, Node*, Node*); 360 361 #pragma varargck type "A" int 362 #pragma varargck type "B" Bits 363 #pragma varargck type "D" Adr* 364 #pragma varargck type "P" Prog* 365 #pragma varargck type "R" int 366 #pragma varargck type "S" char* 367 368 /* wrecklessly steal a field */ 369 370 #define rplink label 371