Mercurial > projects > ddmd
annotate dmd/AsmStatement.d @ 176:fa9a71a9f5a8
Moved all the mutable globals to Global
| author | korDen |
|---|---|
| date | Sun, 10 Oct 2010 05:22:45 +0400 |
| parents | af724d3510d7 |
| children | e3afd1303184 |
| rev | line source |
|---|---|
| 0 | 1 module dmd.AsmStatement; |
| 2 | |
| 114 | 3 import dmd.common; |
| 0 | 4 import dmd.Loc; |
| 5 import dmd.Statement; | |
| 6 import dmd.Token; | |
| 7 import dmd.Scope; | |
| 8 import dmd.OutBuffer; | |
| 9 import dmd.HdrGenState; | |
| 10 import dmd.IRState; | |
| 11 import dmd.BE; | |
| 12 import dmd.LabelDsymbol; | |
| 13 import dmd.Dsymbol; | |
| 14 import dmd.Id; | |
| 15 import dmd.TOK; | |
| 16 import dmd.Global; | |
| 17 import dmd.FuncDeclaration; | |
| 18 import dmd.Declaration; | |
| 19 import dmd.LabelStatement; | |
| 20 import dmd.Util; | |
| 21 | |
| 22 import dmd.backend.code; | |
| 23 import dmd.backend.iasm; | |
| 24 import dmd.backend.block; | |
| 25 import dmd.backend.Blockx; | |
| 26 import dmd.backend.Util; | |
| 27 import dmd.codegen.Util; | |
| 28 import dmd.backend.BC; | |
| 29 import dmd.backend.FL; | |
| 30 import dmd.backend.SFL; | |
| 31 import dmd.backend.SC; | |
| 32 import dmd.backend.mTY; | |
| 33 import dmd.backend.Symbol; | |
| 34 import dmd.backend.LIST; | |
| 35 | |
| 36 import core.stdc.string : memset; | |
| 37 import core.stdc.stdlib : exit, EXIT_FAILURE; | |
| 38 | |
| 174 | 39 import std.stdio; |
| 40 | |
| 0 | 41 class AsmStatement : Statement |
| 42 { | |
| 43 Token* tokens; | |
| 44 code* asmcode; | |
| 45 uint asmalign; // alignment of this statement | |
| 46 bool refparam; // true if function parameter is referenced | |
| 47 bool naked; // true if function is to be naked | |
| 48 uint regs; // mask of registers modified | |
| 49 | |
| 50 this(Loc loc, Token* tokens) | |
| 51 { | |
| 52 super(loc); | |
| 53 this.tokens = tokens; | |
| 54 } | |
| 55 | |
| 72 | 56 override Statement syntaxCopy() |
| 0 | 57 { |
| 58 assert(false); | |
| 59 } | |
| 60 | |
| 72 | 61 override Statement semantic(Scope sc) |
| 0 | 62 { |
| 63 //printf("AsmStatement.semantic()\n"); | |
|
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64 //static if (true) { |
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65 if (sc.func && sc.func.isSafe()) |
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66 error("inline assembler not allowed in @safe function %s", sc.func.toChars()); |
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67 //} else { |
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68 // if (global.params.safe && !sc.module_.safe) |
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69 // { |
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70 // error("inline assembler not allowed in safe mode"); |
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71 // } |
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72 //} |
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73 |
| 0 | 74 OP* o; |
| 75 OPND* o1 = null; | |
| 76 OPND* o2 = null; | |
| 77 OPND* o3 = null; | |
| 78 | |
| 79 PTRNTAB ptb; | |
| 80 uint usNumops; | |
| 81 ubyte uchPrefix = 0; | |
| 82 ubyte bAsmseen; | |
| 83 char* pszLabel = null; | |
| 84 code* c; | |
| 85 FuncDeclaration fd = sc.parent.isFuncDeclaration(); | |
| 86 | |
| 87 assert(fd); | |
| 88 fd.inlineAsm = 1; | |
| 89 | |
| 90 if (!tokens) | |
| 91 return null; | |
| 92 | |
| 176 | 93 auto asmstate = &global.asmstate; |
| 94 | |
| 95 memset(asmstate, 0, (*asmstate).sizeof); | |
| 0 | 96 |
| 97 asmstate.statement = this; | |
| 98 asmstate.sc = sc; | |
| 99 | |
| 100 static if (false) { | |
| 101 // don't use bReturnax anymore, and will fail anyway if we use return type inference | |
| 102 // Scalar return values will always be in AX. So if it is a scalar | |
| 103 // then asm block sets return value if it modifies AX, if it is non-scalar | |
| 104 // then always assume that the ASM block sets up an appropriate return | |
| 105 // value. | |
| 106 | |
| 107 asmstate.bReturnax = 1; | |
| 108 if (sc.func.type.nextOf().isscalar()) | |
| 109 asmstate.bReturnax = 0; | |
| 110 } | |
| 111 | |
| 112 // Assume assembler code takes care of setting the return value | |
| 113 sc.func.hasReturnExp |= 8; | |
| 114 | |
| 115 if (!asmstate.bInit) | |
| 116 { | |
| 117 asmstate.bInit = true; | |
| 118 init_optab(); | |
| 119 asmstate.psDollar = new LabelDsymbol(Id.__dollar); | |
| 120 //asmstate.psLocalsize = new VarDeclaration(0, Type.tint32, Id.__LOCAL_SIZE, null); | |
| 121 asmstate.psLocalsize = new Dsymbol(Id.__LOCAL_SIZE); | |
| 122 cod3_set386(); | |
| 123 } | |
| 124 | |
| 125 asmstate.loc = loc; | |
| 126 | |
| 176 | 127 global.asmtok = tokens; |
| 128 asm_token_trans(global.asmtok); | |
| 0 | 129 if (setjmp(asmstate.env)) |
| 130 { | |
| 176 | 131 global.asmtok = null; // skip rest of line |
| 132 global.tok_value = TOK.TOKeof; | |
| 0 | 133 exit(EXIT_FAILURE); |
| 134 goto AFTER_EMIT; | |
| 135 } | |
| 136 | |
| 176 | 137 switch (cast(int)global.tok_value) |
| 0 | 138 { |
| 139 case ASMTK.ASMTKnaked: | |
| 140 naked = true; | |
| 141 sc.func.naked = true; | |
| 142 asm_token(); | |
| 143 break; | |
| 144 | |
| 145 case ASMTK.ASMTKeven: | |
| 146 asm_token(); | |
| 147 asmalign = 2; | |
| 148 break; | |
| 149 | |
| 150 case TOK.TOKalign: | |
| 151 { | |
| 152 asm_token(); | |
| 153 uint align_ = asm_getnum(); | |
| 154 if (ispow2(align_) == -1) | |
| 155 asmerr(ASMERRMSGS.EM_align, align_); // power of 2 expected | |
| 156 else | |
| 157 asmalign = align_; | |
| 158 break; | |
| 159 } | |
| 160 | |
| 161 // The following three convert the keywords 'int', 'in', 'out' | |
| 162 // to identifiers, since they are x86 instructions. | |
| 163 case TOK.TOKint32: | |
| 164 o = asm_op_lookup(Id.__int.toChars()); | |
| 165 goto Lopcode; | |
| 166 | |
| 167 case TOK.TOKin: | |
| 168 o = asm_op_lookup(Id.___in.toChars()); | |
| 169 goto Lopcode; | |
| 170 | |
| 171 case TOK.TOKout: | |
| 172 o = asm_op_lookup(Id.___out.toChars()); | |
| 173 goto Lopcode; | |
| 174 | |
| 175 case TOK.TOKidentifier: | |
| 176 | 176 o = asm_op_lookup(global.asmtok.ident.toChars()); |
| 0 | 177 if (!o) |
| 178 goto OPCODE_EXPECTED; | |
| 179 | |
| 180 Lopcode: | |
| 181 asmstate.ucItype = o.usNumops & IT.ITMASK; | |
| 182 asm_token(); | |
| 183 if (o.usNumops > 3) | |
| 184 { | |
| 185 switch (asmstate.ucItype) | |
| 186 { | |
| 187 case IT.ITdata: | |
| 188 asmcode = asm_db_parse(o); | |
| 189 goto AFTER_EMIT; | |
| 190 | |
| 191 case IT.ITaddr: | |
| 192 asmcode = asm_da_parse(o); | |
| 193 goto AFTER_EMIT; | |
| 194 | |
| 195 default: | |
| 196 break; | |
| 197 } | |
| 198 } | |
| 199 // get the first part of an expr | |
| 200 o1 = asm_cond_exp(); | |
| 176 | 201 if (global.tok_value == TOK.TOKcomma) |
| 0 | 202 { |
| 203 asm_token(); | |
| 204 o2 = asm_cond_exp(); | |
| 205 } | |
| 176 | 206 if (global.tok_value == TOK.TOKcomma) |
| 0 | 207 { |
| 208 asm_token(); | |
| 209 o3 = asm_cond_exp(); | |
| 210 } | |
| 211 // match opcode and operands in ptrntab to verify legal inst and | |
| 212 // generate | |
| 213 | |
| 214 ptb = asm_classify(o, o1, o2, o3, &usNumops); | |
| 215 assert(ptb.pptb0); | |
| 216 | |
| 217 // | |
| 218 // The Multiply instruction takes 3 operands, but if only 2 are seen | |
| 219 // then the third should be the second and the second should | |
| 220 // be a duplicate of the first. | |
| 221 // | |
| 222 | |
| 223 if (asmstate.ucItype == IT.ITopt && | |
| 224 (usNumops == 2) && | |
| 225 (ASM_GET_aopty(o2.usFlags) == ASM_OPERAND_TYPE._imm) && | |
| 226 ((o.usNumops & IT.ITSIZE) == 3)) | |
| 227 { | |
| 228 o3 = o2; | |
| 229 o2 = opnd_calloc(); | |
| 230 *o2 = *o1; | |
| 231 | |
| 232 // Re-classify the opcode because the first classification | |
| 233 // assumed 2 operands. | |
| 234 | |
| 235 ptb = asm_classify(o, o1, o2, o3, &usNumops); | |
| 236 } | |
| 237 else | |
| 238 { | |
| 239 static if (false) { | |
| 240 if (asmstate.ucItype == IT.ITshift && (ptb.pptb2.usOp2 == 0 || | |
| 241 (ptb.pptb2.usOp2 & _cl))) { | |
| 242 opnd_free(o2); | |
| 243 o2 = null; | |
| 244 usNumops = 1; | |
| 245 } | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 asmcode = asm_emit(loc, usNumops, ptb, o, o1, o2, o3); | |
| 250 break; | |
| 251 | |
| 252 default: | |
| 253 OPCODE_EXPECTED: | |
| 176 | 254 asmerr(ASMERRMSGS.EM_opcode_exp, global.asmtok.toChars()); // assembler opcode expected |
| 0 | 255 break; |
| 256 } | |
| 257 | |
| 258 AFTER_EMIT: | |
| 259 opnd_free(o1); | |
| 260 opnd_free(o2); | |
| 261 opnd_free(o3); | |
| 262 o1 = o2 = o3 = null; | |
| 263 | |
| 176 | 264 if (global.tok_value != TOK.TOKeof) |
| 0 | 265 asmerr(ASMERRMSGS.EM_eol); // end of line expected |
| 266 | |
| 267 //return asmstate.bReturnax; | |
| 268 return this; | |
| 269 } | |
| 270 | |
| 72 | 271 override BE blockExit() |
| 0 | 272 { |
| 273 assert(false); | |
| 274 } | |
| 275 | |
| 72 | 276 override bool comeFrom() |
| 0 | 277 { |
| 278 assert(false); | |
| 279 } | |
| 280 | |
| 72 | 281 override void toCBuffer(OutBuffer buf, HdrGenState* hgs) |
| 0 | 282 { |
| 174 | 283 buf.writestring("asm { "); |
| 284 Token* t = tokens; | |
| 285 while (t) | |
| 286 { | |
| 287 buf.writestring(t.toChars()); | |
| 288 if (t.next && | |
| 289 t.value != TOKmin && | |
| 290 t.value != TOKcomma && | |
| 291 t.next.value != TOKcomma && | |
| 292 t.value != TOKlbracket && | |
| 293 t.next.value != TOKlbracket && | |
| 294 t.next.value != TOKrbracket && | |
| 295 t.value != TOKlparen && | |
| 296 t.next.value != TOKlparen && | |
| 297 t.next.value != TOKrparen && | |
| 298 t.value != TOKdot && | |
| 299 t.next.value != TOKdot) | |
| 300 { | |
| 301 buf.writebyte(' '); | |
| 302 } | |
| 303 t = t.next; | |
| 304 } | |
| 305 buf.writestring("; }"); | |
| 306 buf.writenl(); | |
| 0 | 307 } |
| 308 | |
| 72 | 309 override AsmStatement isAsmStatement() { return this; } |
| 0 | 310 |
| 72 | 311 override void toIR(IRState *irs) |
| 0 | 312 { |
| 313 block* bpre; | |
| 314 block* basm; | |
| 315 Declaration d; | |
| 316 Symbol* s; | |
| 317 Blockx* blx = irs.blx; | |
| 318 | |
| 319 // dumpCode(asmcode); | |
| 320 | |
| 321 //printf("AsmStatement::toIR(asmcode = %x)\n", asmcode); | |
| 322 bpre = blx.curblock; | |
| 323 block_next(blx,BCgoto,null); | |
| 324 basm = blx.curblock; | |
| 325 list_append(&bpre.Bsucc, basm); | |
| 326 basm.Bcode = asmcode; | |
| 327 basm.Balign = cast(ubyte)asmalign; | |
| 174 | 328 |
| 0 | 329 static if (false) { |
| 330 if (label) | |
| 331 { | |
| 332 block* b = labelToBlock(loc, blx, label); | |
| 333 printf("AsmStatement::toIR() %p\n", b); | |
| 334 if (b) | |
| 335 list_append(&basm.Bsucc, b); | |
| 336 } | |
| 337 } | |
| 338 // Loop through each instruction, fixing Dsymbols into Symbol's | |
| 339 for (code* c = asmcode; c; c = c.next) | |
| 340 { | |
| 341 LabelDsymbol label; | |
| 342 block* b; | |
| 174 | 343 |
| 0 | 344 switch (c.IFL1) |
| 345 { | |
| 346 case FLblockoff: | |
| 347 case FLblock: | |
| 348 // FLblock and FLblockoff have LabelDsymbol's - convert to blocks | |
| 349 label = c.IEVlsym1; | |
| 350 b = labelToBlock(loc, blx, label); | |
| 351 list_append(&basm.Bsucc, b); | |
| 352 c.IEV1.Vblock = b; | |
| 353 break; | |
| 354 | |
| 355 case FLdsymbol: | |
| 356 case FLfunc: | |
| 357 s = c.IEVdsym1.toSymbol(); | |
| 358 if (s.Sclass == SCauto && s.Ssymnum == -1) | |
| 359 symbol_add(s); | |
| 360 c.IEVsym1() = s; | |
| 361 c.IFL1 = s.Sfl ? s.Sfl : FLauto; | |
| 362 break; | |
| 363 default: | |
| 364 break; | |
| 365 } | |
| 366 | |
| 367 // Repeat for second operand | |
| 368 switch (c.IFL2) | |
| 369 { | |
| 370 case FLblockoff: | |
| 371 case FLblock: | |
| 372 label = c.IEVlsym2; | |
| 373 b = labelToBlock(loc, blx, label); | |
| 374 list_append(&basm.Bsucc, b); | |
| 375 c.IEV2.Vblock = b; | |
| 376 break; | |
| 377 | |
| 378 case FLdsymbol: | |
| 379 case FLfunc: | |
| 380 d = c.IEVdsym2; | |
| 381 s = d.toSymbol(); | |
| 382 if (s.Sclass == SCauto && s.Ssymnum == -1) | |
| 383 symbol_add(s); | |
| 384 c.IEVsym2() = s; | |
| 385 c.IFL2 = s.Sfl ? s.Sfl : FLauto; | |
| 386 if (d.isDataseg()) | |
| 387 s.Sflags |= SFLlivexit; | |
| 388 break; | |
| 389 default: | |
| 390 break; | |
| 391 } | |
| 392 //c.print(); | |
| 393 } | |
| 394 | |
| 395 basm.bIasmrefparam = refparam; // are parameters reference? | |
| 396 basm.usIasmregs = cast(ushort)regs; // registers modified | |
| 397 | |
| 398 block_next(blx,BCasm, null); | |
| 399 list_prepend(&basm.Bsucc, blx.curblock); | |
| 400 | |
| 401 if (naked) | |
| 402 { | |
| 403 blx.funcsym.Stype.Tty |= mTYnaked; | |
| 404 } | |
| 405 } | |
| 72 | 406 } |