fp to int and back conversion sequences
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19944 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index a92aa1b..731f303 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -412,6 +412,7 @@
{
assert (N.getOperand(0).getValueType() == MVT::i64 && "only quads can be loaded from");
Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
+ Tmp2 = MakeReg(MVT::f64);
//The hard way:
// Spill the integer to memory and reload it from there.
@@ -419,12 +420,10 @@
MachineFunction *F = BB->getParent();
int FrameIdx = F->getFrameInfo()->CreateStackObject(Size, Size);
- //STL LDS
- //STQ LDT
- Opc = DestType == MVT::f64 ? Alpha::STQ : Alpha::STL;
- BuildMI(BB, Opc, 2).addReg(Tmp1).addFrameIndex(FrameIdx).addReg(Alpha::F31);
- Opc = DestType == MVT::f64 ? Alpha::LDT : Alpha::LDS;
- BuildMI(BB, Opc, 1, Result).addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ BuildMI(BB, Alpha::STQ, 3).addReg(Tmp1).addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ BuildMI(BB, Alpha::LDT, 2, Tmp2).addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ Opc = DestType == MVT::f64 ? Alpha::CVTQT : Alpha::CVTQS;
+ BuildMI(BB, Opc, 1, Result).addReg(Tmp2);
//The easy way: doesn't work
// //so these instructions are not supported on ev56
@@ -965,13 +964,34 @@
return Result;
// // case ISD::UINT_TO_FP:
-// case ISD::FP_TO_SINT:
-// assert (N.getValueType() == MVT::f64 && "Only can convert for doubles");
-// Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
-// Tmp2 = MakeReg(SrcTy);
-// BuildMI(BB, CVTTQ, 1, Tmp2).addReg(Tmp1);
-// BuildMI(BB, FTOIT, 1, Result).addReg(Tmp2);
-// return result;
+
+ case ISD::FP_TO_SINT:
+ {
+ assert (DestType == MVT::i64 && "only quads can be loaded to");
+ MVT::ValueType SrcType = N.getOperand(0).getValueType();
+ Tmp1 = SelectExpr(N.getOperand(0)); // Get the operand register
+
+ //The hard way:
+ // Spill the integer to memory and reload it from there.
+ unsigned Size = MVT::getSizeInBits(MVT::f64)/8;
+ MachineFunction *F = BB->getParent();
+ int FrameIdx = F->getFrameInfo()->CreateStackObject(Size, 8);
+
+ //CVTTQ STT LDQ
+ //CVTST CVTTQ STT LDQ
+ if (SrcType == MVT::f32)
+ {
+ Tmp2 = MakeReg(MVT::f64);
+ BuildMI(BB, Alpha::CVTST, 1, Tmp2).addReg(Tmp1);
+ Tmp1 = Tmp2;
+ }
+ Tmp2 = MakeReg(MVT::f64);
+ BuildMI(BB, Alpha::CVTTQ, 1, Tmp2).addReg(Tmp1);
+ BuildMI(BB, Alpha::STT, 3).addReg(Tmp2).addFrameIndex(FrameIdx).addReg(Alpha::F31);
+ BuildMI(BB, Alpha::LDQ, 2, Result).addFrameIndex(FrameIdx).addReg(Alpha::F31);
+
+ return Result;
+ }
// // case ISD::FP_TO_UINT: