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Allow hexadecimal integer constants to be used 

llvm-svn: 5802
This commit is contained in:
Chris Lattner 2003-04-17 22:17:32 +00:00
parent acdbe7158d
commit e509bd47bf
1 changed files with 19 additions and 5 deletions
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24
llvm/lib/AsmParser/Lexer.l
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@ -48,10 +48,7 @@ static uint64_t atoull(const char *Buffer) {
return Result;
}
// HexToFP - Convert the ascii string in hexidecimal format to the floating
// point representation of it.
//
static double HexToFP(const char *Buffer) {
static uint64_t HexIntToVal(const char *Buffer) {
uint64_t Result = 0;
for (; *Buffer; ++Buffer) {
uint64_t OldRes = Result;
@ -67,6 +64,15 @@ static double HexToFP(const char *Buffer) {
if (Result < OldRes) // Uh, oh, overflow detected!!!
ThrowException("constant bigger than 64 bits detected!");
}
return Result;
}
// HexToFP - Convert the ascii string in hexidecimal format to the floating
// point representation of it.
//
static double HexToFP(const char *Buffer) {
uint64_t Result = HexIntToVal(Buffer);
assert(sizeof(double) == sizeof(Result) &&
"Data sizes incompatible on this target!");
@ -142,6 +148,11 @@ FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
* hexadecimal number for when exponential notation is not precise enough.
*/
HexFPConstant 0x[0-9A-Fa-f]+
/* HexIntConstant - Hexadecimal constant generated by the CFE to avoid forcing
* it to deal with 64 bit numbers.
*/
HexIntConstant [us]0x[0-9A-Fa-f]+
%%
{Comment} { /* Ignore comments for now */ }
@ -249,7 +260,10 @@ getelementptr { RET_TOK(MemOpVal, GetElementPtr, GETELEMENTPTR); }
llvmAsmlval.SInt64Val = -Val;
return ESINT64VAL;
}
{HexIntConstant} {
llvmAsmlval.UInt64Val = HexIntToVal(yytext+3);
return yytext[0] == 's' ? ESINT64VAL : EUINT64VAL;
}
{EPInteger} { llvmAsmlval.UIntVal = atoull(yytext+1); return UINTVAL; }
{ENInteger} {