1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/lib/VMCore/Instructions.cpp b/llvm/lib/VMCore/Instructions.cpp
index 8db6ac9a33f..185cd0557c1 100644
--- a/llvm/lib/VMCore/Instructions.cpp
+++ b/llvm/lib/VMCore/Instructions.cpp
@@ -2003,6 +2003,44 @@ bool BinaryOperator::isExact() const {
 }
 
 //===----------------------------------------------------------------------===//
+//                             FPMathOperator Class
+//===----------------------------------------------------------------------===//
+
+/// getFPAccuracy - Get the maximum error permitted by this operation in ULPs.
+/// An accuracy of 0.0 means that the operation should be performed with the
+/// default precision.  A huge value is returned if the accuracy is 'fast'.
+float FPMathOperator::getFPAccuracy() const {
+  const MDNode *MD =
+    cast<Instruction>(this)->getMetadata(LLVMContext::MD_fpmath);
+  if (!MD)
+    return 0.0;
+  Value *Op = MD->getOperand(0);
+  if (const ConstantFP *Accuracy = dyn_cast<ConstantFP>(Op))
+    return Accuracy->getValueAPF().convertToFloat();
+  // If it's not a floating point number then it must be 'fast'.
+  assert(isa<MDString>(Op) && cast<MDString>(Op)->getString() == "fast" &&
+         "Expected the 'fast' keyword!");
+  return HUGE_VALF;
+}
+
+/// isFastFPAccuracy - Return true if the accuracy is 'fast'.  This says that
+/// speed is more important than accuracy.
+bool FPMathOperator::isFastFPAccuracy() const {
+  const MDNode *MD =
+    cast<Instruction>(this)->getMetadata(LLVMContext::MD_fpmath);
+  if (!MD)
+    return false;
+  Value *Op = MD->getOperand(0);
+  if (isa<ConstantFP>(Op))
+    return false;
+  // If it's not a floating point number then it must be 'fast'.
+  assert(isa<MDString>(Op) && cast<MDString>(Op)->getString() == "fast" &&
+         "Expected the 'fast' keyword!");
+  return true;
+}
+
+
+//===----------------------------------------------------------------------===//
 //                                CastInst Class
 //===----------------------------------------------------------------------===//