Remove unnecessary bit-wise AND from the limited precision work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56049 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 2c38513..57b6768 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2755,18 +2755,16 @@
// GetExponent - Get the exponent:
//
-// (float)(((Op1 & 0x7f800000) >> 23) - 127);
+// (float)((Op1 >> 23) - 127);
//
// where Op is the hexidecimal representation of floating point value.
static SDValue
GetExponent(SelectionDAG &DAG, SDValue Op) {
- SDValue t1 = DAG.getNode(ISD::AND, MVT::i32, Op,
- DAG.getConstant(0x7f800000, MVT::i32));
- SDValue t2 = DAG.getNode(ISD::SRL, MVT::i32, t1,
+ SDValue t1 = DAG.getNode(ISD::SRL, MVT::i32, Op,
DAG.getConstant(23, MVT::i32));
- SDValue t3 = DAG.getNode(ISD::SUB, MVT::i32, t2,
+ SDValue t2 = DAG.getNode(ISD::SUB, MVT::i32, t1,
DAG.getConstant(127, MVT::i32));
- return DAG.getNode(ISD::UINT_TO_FP, MVT::f32, t3);
+ return DAG.getNode(ISD::UINT_TO_FP, MVT::f32, t2);
}
/// Inlined utility function to implement binary input atomic intrinsics for