[llvm-commits] CVS: llvm/lib/Target/CBackend/Writer.cpp
Chris Lattner
lattner at cs.uiuc.edu
Tue Aug 23 13:23:03 PDT 2005
Changes in directory llvm/lib/Target/CBackend:
Writer.cpp updated: 1.243 -> 1.244
---
Log message:
Fix PR618: http://llvm.cs.uiuc.edu/PR618 and Regression/CodeGen/CBackend/2005-08-23-Fmod.ll by not emitting
x%y for 'rem' on fp values.
---
Diffs of the changes: (+14 -0)
Writer.cpp | 14 ++++++++++++++
1 files changed, 14 insertions(+)
Index: llvm/lib/Target/CBackend/Writer.cpp
diff -u llvm/lib/Target/CBackend/Writer.cpp:1.243 llvm/lib/Target/CBackend/Writer.cpp:1.244
--- llvm/lib/Target/CBackend/Writer.cpp:1.243 Wed Aug 17 14:30:44 2005
+++ llvm/lib/Target/CBackend/Writer.cpp Tue Aug 23 15:22:50 2005
@@ -871,6 +871,9 @@
}
// 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 @@
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));
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