Preliminary soft float support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 41828b5..314941a 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -86,10 +86,17 @@
assert(VT < PromoteTo && "Must promote to a larger type!");
TransformToType[VT] = PromoteTo;
} else if (Action == TargetLowering::Expand) {
- assert((VT == MVT::Vector || MVT::isInteger(VT)) && VT > MVT::i8 &&
- "Cannot expand this type: target must support SOME integer reg!");
- // Expand to the next smaller integer type!
- TransformToType[VT] = (MVT::ValueType)(VT-1);
+ // f32 and f64 is each expanded to corresponding integer type of same size.
+ if (VT == MVT::f32)
+ TransformToType[VT] = MVT::i32;
+ else if (VT == MVT::f64)
+ TransformToType[VT] = MVT::i64;
+ else {
+ assert((VT == MVT::Vector || MVT::isInteger(VT)) && VT > MVT::i8 &&
+ "Cannot expand this type: target must support SOME integer reg!");
+ // Expand to the next smaller integer type!
+ TransformToType[VT] = (MVT::ValueType)(VT-1);
+ }
}
}
@@ -129,12 +136,27 @@
else
TransformToType[(MVT::ValueType)IntReg] = (MVT::ValueType)IntReg;
- // If the target does not have native support for F32, promote it to F64.
- if (!isTypeLegal(MVT::f32))
- SetValueTypeAction(MVT::f32, Promote, *this,
- TransformToType, ValueTypeActions);
- else
+ // If the target does not have native F64 support, expand it to I64. We will
+ // be generating soft float library calls. If the target does not have native
+ // support for F32, promote it to F64 if it is legal. Otherwise, expand it to
+ // I32.
+ if (isTypeLegal(MVT::f64))
+ TransformToType[MVT::f64] = MVT::f64;
+ else {
+ NumElementsForVT[MVT::f64] = NumElementsForVT[MVT::i64];
+ SetValueTypeAction(MVT::f64, Expand, *this, TransformToType,
+ ValueTypeActions);
+ }
+ if (isTypeLegal(MVT::f32))
TransformToType[MVT::f32] = MVT::f32;
+ else if (isTypeLegal(MVT::f64))
+ SetValueTypeAction(MVT::f32, Promote, *this, TransformToType,
+ ValueTypeActions);
+ else {
+ NumElementsForVT[MVT::f32] = NumElementsForVT[MVT::i32];
+ SetValueTypeAction(MVT::f32, Expand, *this, TransformToType,
+ ValueTypeActions);
+ }
// Set MVT::Vector to always be Expanded
SetValueTypeAction(MVT::Vector, Expand, *this, TransformToType,
@@ -147,9 +169,6 @@
if (isTypeLegal((MVT::ValueType)i))
TransformToType[i] = (MVT::ValueType)i;
}
-
- assert(isTypeLegal(MVT::f64) && "Target does not support FP?");
- TransformToType[MVT::f64] = MVT::f64;
}
const char *TargetLowering::getTargetNodeName(unsigned Opcode) const {