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R600: Allow ftrunc

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v2: Add ftrunc->TRUNC pattern instead of replacing int_AMDGPU_trunc
v3: move ftrunc pattern next to TRUNC definition, it's available since R600

Patch By: Jan Vesely

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197783 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2013-12-20 05:11:55 +00:00
parent 658537c710
commit 37ee312f77
3 changed files with 18 additions and 0 deletions
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2
lib/Target/R600/AMDGPUISelLowering.cpp
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@ -60,6 +60,7 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
setOperationAction(ISD::FRINT, MVT::f32, Legal);
setOperationAction(ISD::FROUND, MVT::f32, Legal);
setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
// The hardware supports ROTR, but not ROTL
setOperationAction(ISD::ROTL, MVT::i32, Expand);
@ -184,6 +185,7 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
setOperationAction(ISD::FADD, VT, Expand);
setOperationAction(ISD::FDIV, VT, Expand);
setOperationAction(ISD::FFLOOR, VT, Expand);
setOperationAction(ISD::FTRUNC, VT, Expand);
setOperationAction(ISD::FMUL, VT, Expand);
setOperationAction(ISD::FRINT, VT, Expand);
setOperationAction(ISD::FSQRT, VT, Expand);

3
lib/Target/R600/R600Instructions.td
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@ -733,6 +733,9 @@ def CEIL : R600_1OP_Helper <0x12, "CEIL", fceil>;
def RNDNE : R600_1OP_Helper <0x13, "RNDNE", frint>;
def FLOOR : R600_1OP_Helper <0x14, "FLOOR", ffloor>;
// Add also ftrunc intrinsic pattern
def : Pat<(ftrunc f32:$src0), (TRUNC $src0)>;
def MOV : R600_1OP <0x19, "MOV", []>;
let isPseudo = 1, isCodeGenOnly = 1, usesCustomInserter = 1 in {

13
test/CodeGen/R600/llvm.trunc.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
; CHECK-LABEL: @trunc_f32
; CHECK: TRUNC
define void @trunc_f32(float addrspace(1)* %out, float %in) {
entry:
%0 = call float @llvm.trunc.f32(float %in)
store float %0, float addrspace(1)* %out
ret void
}
declare float @llvm.trunc.f32(float)