From 07cabb9432dd927a6d7b1f72039d9475c1742971 Mon Sep 17 00:00:00 2001 From: Dale Johannesen Date: Mon, 8 Sep 2008 18:00:26 +0000 Subject: [PATCH] Redo the 3 existing low-precision expansions to use float constants. An oversight by the numerics people who supplied this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55930 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../SelectionDAG/SelectionDAGBuild.cpp | 85 +++++++++---------- 1 file changed, 38 insertions(+), 47 deletions(-) diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index 276d165db9a..83a5dcb2973 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp @@ -2801,28 +2801,25 @@ SelectionDAGLowering::visitLog2(CallInst &I) { SDValue t5 = DAG.getNode(ISD::AND, MVT::i32, t4, DAG.getConstant(1073741823, MVT::i32)); SDValue t6 = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, t5); - SDValue t7 = DAG.getNode(ISD::FP_EXTEND, MVT::f64, t6); - SDValue t8 = DAG.getNode(ISD::FMUL, MVT::f64, t7, + SDValue t7 = DAG.getNode(ISD::FMUL, MVT::f32, t6, DAG.getConstantFP(APFloat( - APInt(64, 0xbfb4e4c5b6dfced3ULL)), MVT::f64)); - SDValue t9 = DAG.getNode(ISD::FADD, MVT::f64, t8, + APInt(32, 0xbda7262e)), MVT::f32)); + SDValue t8 = DAG.getNode(ISD::FADD, MVT::f32, t7, DAG.getConstantFP(APFloat( - APInt(64, 0x3fe4a5015b0db188ULL)), MVT::f64)); - SDValue t10 = DAG.getNode(ISD::FMUL, MVT::f64, t9, t7); - SDValue t11 = DAG.getNode(ISD::FSUB, MVT::f64, t10, + APInt(32, 0x3f25280b)), MVT::f32)); + SDValue t9 = DAG.getNode(ISD::FMUL, MVT::f32, t8, t6); + SDValue t10 = DAG.getNode(ISD::FSUB, MVT::f32, t9, DAG.getConstantFP(APFloat( - APInt(64, 0x4000f724658ffcb8ULL)), MVT::f64)); - SDValue t12 = DAG.getNode(ISD::FMUL, MVT::f64, t11, t7); - SDValue t13 = DAG.getNode(ISD::FADD, MVT::f64, t12, + APInt(32, 0x4007b923)), MVT::f32)); + SDValue t11 = DAG.getNode(ISD::FMUL, MVT::f32, t10, t6); + SDValue t12 = DAG.getNode(ISD::FADD, MVT::f32, t11, DAG.getConstantFP(APFloat( - APInt(64, 0x401047c5d1dbd553ULL)), MVT::f64)); - SDValue t14 = DAG.getNode(ISD::FMUL, MVT::f64, t13, t7); - SDValue t15 = DAG.getNode(ISD::FSUB, MVT::f64, t14, + APInt(32, 0x40823e2f)), MVT::f32)); + SDValue t13 = DAG.getNode(ISD::FMUL, MVT::f32, t12, t6); + SDValue t14 = DAG.getNode(ISD::FSUB, MVT::f32, t13, DAG.getConstantFP(APFloat( - APInt(64, 0x40041a537b273db2ULL)), MVT::f64)); - SDValue t16 = DAG.getNode(ISD::FP_ROUND, MVT::f32, t15, - DAG.getConstant(0, MVT::i32)); - result = DAG.getNode(ISD::FADD, MVT::f32, t3, t16); + APInt(32, 0x4020d29c)), MVT::f32)); + result = DAG.getNode(ISD::FADD, MVT::f32, t3, t14); } else { // No special expansion. result = DAG.getNode(ISD::FLOG2, @@ -2857,24 +2854,21 @@ SelectionDAGLowering::visitLog10(CallInst &I) { SDValue t6 = DAG.getNode(ISD::AND, MVT::i32, t5, DAG.getConstant(1073741823, MVT::i32)); SDValue t7 = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, t6); - SDValue t8 = DAG.getNode(ISD::FP_EXTEND, MVT::f64, t7); - SDValue t9 = DAG.getNode(ISD::FMUL, MVT::f64, t8, + SDValue t8 = DAG.getNode(ISD::FMUL, MVT::f32, t7, DAG.getConstantFP(APFloat( - APInt(64, 0x3fa863e61d44a337ULL)), MVT::f64)); - SDValue t10 = DAG.getNode(ISD::FSUB, MVT::f64, t9, + APInt(32, 0x3d431f31)), MVT::f32)); + SDValue t9 = DAG.getNode(ISD::FSUB, MVT::f32, t8, DAG.getConstantFP(APFloat( - APInt(64, 0x3fd443f63982ad9aULL)), MVT::f64)); - SDValue t11 = DAG.getNode(ISD::FMUL, MVT::f64, t10, t8); - SDValue t12 = DAG.getNode(ISD::FADD, MVT::f64, t11, + APInt(32, 0x3ea21fb2)), MVT::f32)); + SDValue t10 = DAG.getNode(ISD::FMUL, MVT::f32, t9, t7); + SDValue t11 = DAG.getNode(ISD::FADD, MVT::f32, t10, DAG.getConstantFP(APFloat( - APInt(64, 0x3fed5c4641d8bd71ULL)), MVT::f64)); - SDValue t13 = DAG.getNode(ISD::FMUL, MVT::f64, t12, t8); - SDValue t14 = DAG.getNode(ISD::FSUB, MVT::f64, t13, + APInt(32, 0x3f6ae232)), MVT::f32)); + SDValue t12 = DAG.getNode(ISD::FMUL, MVT::f32, t11, t7); + SDValue t13 = DAG.getNode(ISD::FSUB, MVT::f32, t12, DAG.getConstantFP(APFloat( - APInt(64, 0x3fe4bef863538c6fULL)), MVT::f64)); - SDValue t15 = DAG.getNode(ISD::FP_ROUND, MVT::f32, t14, - DAG.getConstant(0, MVT::i32)); - result = DAG.getNode(ISD::FADD, MVT::f32, t4, t15); + APInt(32, 0x3f25f7c3)), MVT::f32)); + result = DAG.getNode(ISD::FADD, MVT::f32, t4, t13); } else { // No special expansion. result = DAG.getNode(ISD::FLOG10, @@ -2898,26 +2892,23 @@ SelectionDAGLowering::visitExp2(CallInst &I) { SDValue t2 = DAG.getNode(ISD::FSUB, MVT::f32, operand, t1); SDValue t3 = DAG.getNode(ISD::SHL, MVT::i32, t0, DAG.getConstant(23, MVT::i32)); - SDValue t4 = DAG.getNode(ISD::FP_EXTEND, MVT::f64, t2); - SDValue t5 = DAG.getNode(ISD::FMUL, MVT::f64, t4, + SDValue t4 = DAG.getNode(ISD::FMUL, MVT::f32, t2, DAG.getConstantFP(APFloat( - APInt(64, 0x3fb446bc609aa9cdULL)), MVT::f64)); - SDValue t6 = DAG.getNode(ISD::FADD, MVT::f64, t5, + APInt(32, 0x3da235e3)), MVT::f32)); + SDValue t5 = DAG.getNode(ISD::FADD, MVT::f32, t4, DAG.getConstantFP(APFloat( - APInt(64, 0x3fccb71e629f3a20ULL)), MVT::f64)); - SDValue t7 = DAG.getNode(ISD::FMUL, MVT::f64, t6, t4); - SDValue t8 = DAG.getNode(ISD::FADD, MVT::f64, t7, + APInt(32, 0x3e65b8f3)), MVT::f32)); + SDValue t6 = DAG.getNode(ISD::FMUL, MVT::f32, t5, t2); + SDValue t7 = DAG.getNode(ISD::FADD, MVT::f32, t6, DAG.getConstantFP(APFloat( - APInt(64, 0x3fe64960db7bd5feULL)), MVT::f64)); - SDValue t9 = DAG.getNode(ISD::FMUL, MVT::f64, t8, t4); - SDValue t10 = DAG.getNode(ISD::FADD, MVT::f64, t9, + APInt(32, 0x3f324b07)), MVT::f32)); + SDValue t8 = DAG.getNode(ISD::FMUL, MVT::f32, t7, t2); + SDValue t9 = DAG.getNode(ISD::FADD, MVT::f32, t8, DAG.getConstantFP(APFloat( - APInt(64, 0x3fefff1f934bd549ULL)), MVT::f64)); - SDValue t11 = DAG.getNode(ISD::FP_ROUND, MVT::f32, t10, - DAG.getConstant(0, MVT::i32)); - SDValue t12 = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, t11); - SDValue t13 = DAG.getNode(ISD::ADD, MVT::i32, t12, t3); - result = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, t13); + APInt(32, 0x3f7ff8fd)), MVT::f32)); + SDValue t10 = DAG.getNode(ISD::BIT_CONVERT, MVT::i32, t9); + SDValue t11 = DAG.getNode(ISD::ADD, MVT::i32, t10, t3); + result = DAG.getNode(ISD::BIT_CONVERT, MVT::f32, t11); } else { // No special expansion. result = DAG.getNode(ISD::FEXP2, -- 2.34.1