[llvm-commits] [llvm] r49416 - /llvm/trunk/lib/VMCore/Constants.cpp
Chris Lattner
sabre at nondot.org
Tue Apr 8 23:38:31 PDT 2008
Author: lattner
Date: Wed Apr 9 01:38:30 2008
New Revision: 49416
URL: http://llvm.org/viewvc/llvm-project?rev=49416&view=rev
Log:
add a simplified accessor for creating an fp constant of a
particular value but variable type.
Modified:
llvm/trunk/lib/VMCore/Constants.cpp
Modified: llvm/trunk/lib/VMCore/Constants.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Constants.cpp?rev=49416&r1=49415&r2=49416&view=diff
==============================================================================
--- llvm/trunk/lib/VMCore/Constants.cpp (original)
+++ llvm/trunk/lib/VMCore/Constants.cpp Wed Apr 9 01:38:30 2008
@@ -246,21 +246,24 @@
// ConstantFP
//===----------------------------------------------------------------------===//
+static const fltSemantics *TypeToFloatSemantics(const Type *Ty) {
+ if (Ty == Type::FloatTy)
+ return &APFloat::IEEEsingle;
+ if (Ty == Type::DoubleTy)
+ return &APFloat::IEEEdouble;
+ if (Ty == Type::X86_FP80Ty)
+ return &APFloat::x87DoubleExtended;
+ else if (Ty == Type::FP128Ty)
+ return &APFloat::IEEEquad;
+
+ assert(Ty == Type::PPC_FP128Ty && "Unknown FP format");
+ return &APFloat::PPCDoubleDouble;
+}
+
ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
: Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
- // temporary
- if (Ty==Type::FloatTy)
- assert(&V.getSemantics()==&APFloat::IEEEsingle);
- else if (Ty==Type::DoubleTy)
- assert(&V.getSemantics()==&APFloat::IEEEdouble);
- else if (Ty==Type::X86_FP80Ty)
- assert(&V.getSemantics()==&APFloat::x87DoubleExtended);
- else if (Ty==Type::FP128Ty)
- assert(&V.getSemantics()==&APFloat::IEEEquad);
- else if (Ty==Type::PPC_FP128Ty)
- assert(&V.getSemantics()==&APFloat::PPCDoubleDouble);
- else
- assert(0);
+ assert(&V.getSemantics() == TypeToFloatSemantics(Ty) &&
+ "FP type Mismatch");
}
bool ConstantFP::isNullValue() const {
@@ -335,6 +338,15 @@
return Slot = new ConstantFP(Ty, V);
}
+/// get() - This returns a constant fp for the specified value in the
+/// specified type. This should only be used for simple constant values like
+/// 2.0/1.0 etc, that are known-valid both as double and as the target format.
+ConstantFP *ConstantFP::get(const Type *Ty, double V) {
+ APFloat FV(V);
+ FV.convert(*TypeToFloatSemantics(Ty), APFloat::rmNearestTiesToEven);
+ return get(FV);
+}
+
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
//===----------------------------------------------------------------------===//
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