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| author | Kalle Raiskila <kalle.raiskila@nokia.com> | 2010-11-23 13:27:59 +0000 |
|---|---|---|
| committer | Kalle Raiskila <kalle.raiskila@nokia.com> | 2010-11-23 13:27:59 +0000 |
| commit | 0cc5b1f60e02716cac617959d88d4c412fdb3154 (patch) | |
| tree | b3feab55bc9327c224c9425f578487f6279049ad | |
| parent | beb6898df8f96ccea4ae147587479b507bb3e491 (diff) | |
| download | external_llvm-0cc5b1f60e02716cac617959d88d4c412fdb3154.zip external_llvm-0cc5b1f60e02716cac617959d88d4c412fdb3154.tar.gz external_llvm-0cc5b1f60e02716cac617959d88d4c412fdb3154.tar.bz2 | |
Division by pow-of-2 is not cheap on SPU, do it with
shifts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120022 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/CellSPU/SPUISelLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/CellSPU/div_ops.ll | 22 |
2 files changed, 22 insertions, 2 deletions
diff --git a/lib/Target/CellSPU/SPUISelLowering.cpp b/lib/Target/CellSPU/SPUISelLowering.cpp index 014fbbe..0fa511e 100644 --- a/lib/Target/CellSPU/SPUISelLowering.cpp +++ b/lib/Target/CellSPU/SPUISelLowering.cpp @@ -97,8 +97,6 @@ namespace { SPUTargetLowering::SPUTargetLowering(SPUTargetMachine &TM) : TargetLowering(TM, new TargetLoweringObjectFileELF()), SPUTM(TM) { - // Fold away setcc operations if possible. - setPow2DivIsCheap(); // Use _setjmp/_longjmp instead of setjmp/longjmp. setUseUnderscoreSetJmp(true); diff --git a/test/CodeGen/CellSPU/div_ops.ll b/test/CodeGen/CellSPU/div_ops.ll new file mode 100644 index 0000000..0c93d83 --- /dev/null +++ b/test/CodeGen/CellSPU/div_ops.ll @@ -0,0 +1,22 @@ +; RUN: llc --march=cellspu %s -o - | FileCheck %s + +; signed division rounds towards zero, rotma don't. +define i32 @sdivide (i32 %val ) +{ +; CHECK: rotmai +; CHECK: rotmi +; CHECK: a +; CHECK: rotmai +; CHECK: bi $lr + %rv = sdiv i32 %val, 4 + ret i32 %rv +} + +define i32 @udivide (i32 %val ) +{ +; CHECK: rotmi +; CHECK: bi $lr + %rv = udiv i32 %val, 4 + ret i32 %rv +} + |