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Added support symbolic floating point constants in the MC assembler for Infinity

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and Nans with the same strings as GAS supports.  rdar://8673024


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128488 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby 2011-03-29 21:11:52 +00:00
parent 5726005e4f
commit 360d8d7a02
2 changed files with 17 additions and 3 deletions
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14
lib/MC/MCParser/AsmParser.cpp
View File

@ -1552,13 +1552,21 @@ bool AsmParser::ParseDirectiveRealValue(const fltSemantics &Semantics) {
Lex();
if (getLexer().isNot(AsmToken::Integer) &&
getLexer().isNot(AsmToken::Real))
getLexer().isNot(AsmToken::Real) &&
getLexer().isNot(AsmToken::Identifier))
return TokError("unexpected token in directive");
// Convert to an APFloat.
APFloat Value(Semantics);
if (Value.convertFromString(getTok().getString(),
APFloat::rmNearestTiesToEven) ==
StringRef IDVal = getTok().getString();
if (getLexer().is(AsmToken::Identifier)) {
if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
Value = APFloat::getInf(Semantics);
else if (!IDVal.compare_lower("nan"))
Value = APFloat::getNaN(Semantics, false, ~0);
else
return TokError("invalid floating point literal");
} else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
APFloat::opInvalidOp)
return TokError("invalid floating point literal");
if (IsNeg)

6
test/MC/AsmParser/floating-literals.s
View File

@ -6,6 +6,12 @@
# CHECK: .long 1082549862
.single 1.2455, +2.3, 3, + 4.2
# CHECK: .long 2139095040
.single InFinIty
# CHECK: .long 2147483647
.single nAN
# CHECK: .long 1067928519
.float 1.307