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Implement arbitrary integer constants through the use of APInt values.

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Positive, negative, and hexadecimal integer constants will now return an
APInt for values having > 64 bits of precision.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34715 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-02-28 02:24:27 +00:00
parent f231004a1c
commit c34ebfbcfd
1 changed files with 45 additions and 13 deletions
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58
lib/AsmParser/Lexer.l
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@ -186,6 +186,7 @@ HexFPConstant 0x[0-9A-Fa-f]+
* it to deal with 64 bit numbers.
*/
HexIntConstant [us]0x[0-9A-Fa-f]+
%%
{Comment} { /* Ignore comments for now */ }
@ -361,20 +362,51 @@ shufflevector { RET_TOK(OtherOpVal, ShuffleVector, SHUFFLEVECTOR); }
return ATSTRINGCONSTANT;
}
{PInteger} { llvmAsmlval.UInt64Val = atoull(yytext); return EUINT64VAL; }
{NInteger} {
uint64_t Val = atoull(yytext+1);
// +1: we have bigger negative range
if (Val > (uint64_t)INT64_MAX+1)
GenerateError("Constant too large for signed 64 bits!");
llvmAsmlval.SInt64Val = -Val;
return ESINT64VAL;
{PInteger} { int len = strlen(yytext);
uint32_t numBits = ((len * 64) / 19) + 1;
APInt Tmp(numBits, yytext, len, 10);
uint32_t activeBits = Tmp.getActiveBits();
if (activeBits > 0 && activeBits < numBits)
Tmp.trunc(activeBits);
if (Tmp.getBitWidth() > 64) {
llvmAsmlval.APIntVal = new APInt(Tmp);
return EUAPINTVAL;
} else {
llvmAsmlval.UInt64Val = Tmp.getZExtValue();
return EUINT64VAL;
}
}
{HexIntConstant} {
llvmAsmlval.UInt64Val = HexIntToVal(yytext+3);
return yytext[0] == 's' ? ESINT64VAL : EUINT64VAL;
{NInteger} { int len = strlen(yytext);
uint32_t numBits = (((len-1) * 64) / 19) + 1;
APInt Tmp(numBits, yytext, len, 10);
uint32_t minBits = Tmp.getMinSignedBits();
if (minBits > 0 && minBits < numBits)
Tmp.trunc(minBits);
if (Tmp.getBitWidth() > 64) {
llvmAsmlval.APIntVal = new APInt(Tmp);
return ESAPINTVAL;
} else {
llvmAsmlval.SInt64Val = Tmp.getSExtValue();
return ESINT64VAL;
}
}
{HexIntConstant} { int len = strlen(yytext+3) - 3;
uint32_t bits = len * 4;
APInt Tmp(bits, yytext+3, len, 16);
uint32_t activeBits = Tmp.getActiveBits();
if (activeBits > 0 && activeBits < bits)
Tmp.trunc(activeBits);
if (Tmp.getBitWidth() > 64) {
llvmAsmlval.APIntVal = new APInt(Tmp);
return yytext[0] == 's' ? ESAPINTVAL : EUAPINTVAL;
} else if (yytext[0] == 's') {
llvmAsmlval.SInt64Val = Tmp.getSExtValue();
return ESINT64VAL;
} else {
llvmAsmlval.UInt64Val = Tmp.getZExtValue();
return EUINT64VAL;
}
}
{LocalVarID} {