[llvm-commits] CVS: llvm/lib/Target/CBackend/Writer.cpp

[Chris Lattner]

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));