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Fix PR618 and Regression/CodeGen/CBackend/2005-08-23-Fmod.ll by not emitting

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x%y for 'rem' on fp values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22984 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-23 20:22:50 +00:00
parent c544cece40
commit 57da25231a
2 changed files with 28 additions and 0 deletions
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14
lib/Target/CBackend/CBackend.cpp
View File

@ -871,6 +871,9 @@ bool CWriter::doInitialization(Module &M) {
}
// Function declarations
Out << "double fmod(double, double);\n"; // Support for FP rem
Out << "float fmodf(float, float);\n";
if (!M.empty()) {
Out << "\n/* Function Declarations */\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
@ -1349,6 +1352,17 @@ void CWriter::visitBinaryOperator(Instruction &I) {
Out << "-(";
writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
Out << ")";
} else if (I.getOpcode() == Instruction::Rem &&
I.getType()->isFloatingPoint()) {
// Output a call to fmod/fmodf instead of emitting a%b
if (I.getType() == Type::FloatTy)
Out << "fmodf(";
else
Out << "fmod(";
writeOperand(I.getOperand(0));
Out << ", ";
writeOperand(I.getOperand(1));
Out << ")";
} else {
writeOperand(I.getOperand(0));

14
lib/Target/CBackend/Writer.cpp
View File

@ -871,6 +871,9 @@ bool CWriter::doInitialization(Module &M) {
}
// Function declarations
Out << "double fmod(double, double);\n"; // Support for FP rem
Out << "float fmodf(float, float);\n";
if (!M.empty()) {
Out << "\n/* Function Declarations */\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
@ -1349,6 +1352,17 @@ void CWriter::visitBinaryOperator(Instruction &I) {
Out << "-(";
writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
Out << ")";
} else if (I.getOpcode() == Instruction::Rem &&
I.getType()->isFloatingPoint()) {
// Output a call to fmod/fmodf instead of emitting a%b
if (I.getType() == Type::FloatTy)
Out << "fmodf(";
else
Out << "fmod(";
writeOperand(I.getOperand(0));
Out << ", ";
writeOperand(I.getOperand(1));
Out << ")";
} else {
writeOperand(I.getOperand(0));