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R600: Handle fcopysign

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llvm-svn: 210564
This commit is contained in:
Matt Arsenault 2014-06-10 19:00:20 +00:00
parent 5bfef73e00
commit d30b483e1a
7 changed files with 114 additions and 3 deletions
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7
lib/Target/R600/AMDGPUISelLowering.cpp
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@ -214,6 +214,12 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
setOperationAction(ISD::UDIVREM, MVT::i64, Custom);
setOperationAction(ISD::UREM, MVT::i32, Expand);
if (!Subtarget->hasBFI()) {
// fcopysign can be done in a single instruction with BFI.
setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
}
static const MVT::SimpleValueType IntTypes[] = {
MVT::v2i32, MVT::v4i32
};
@ -260,6 +266,7 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
setOperationAction(ISD::FNEG, VT, Expand);
setOperationAction(ISD::SELECT, VT, Expand);
setOperationAction(ISD::VSELECT, VT, Expand);
setOperationAction(ISD::FCOPYSIGN, VT, Expand);
}
setTargetDAGCombine(ISD::MUL);

15
lib/Target/R600/AMDGPUInstructions.td
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@ -365,7 +365,7 @@ class DwordAddrPat<ValueType vt, RegisterClass rc> : Pat <
// BFI_INT patterns
multiclass BFIPatterns <Instruction BFI_INT> {
multiclass BFIPatterns <Instruction BFI_INT, Instruction LoadImm32> {
// Definition from ISA doc:
// (y & x) | (z & ~x)
@ -381,6 +381,19 @@ multiclass BFIPatterns <Instruction BFI_INT> {
(BFI_INT $x, $y, $z)
>;
def : Pat <
(fcopysign f32:$src0, f32:$src1),
(BFI_INT (LoadImm32 0x7fffffff), $src0, $src1)
>;
def : Pat <
(f64 (fcopysign f64:$src0, f64:$src1)),
(INSERT_SUBREG (INSERT_SUBREG (f64 (IMPLICIT_DEF)),
(i32 (EXTRACT_SUBREG $src0, sub0)), sub0),
(BFI_INT (LoadImm32 0x7fffffff),
(i32 (EXTRACT_SUBREG $src0, sub1)),
(i32 (EXTRACT_SUBREG $src1, sub1))), sub1)
>;
}
// SHA-256 Ma patterns

4
lib/Target/R600/AMDGPUSubtarget.h
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@ -72,6 +72,10 @@ public:
return (getGeneration() >= EVERGREEN);
}
bool hasBFI() const {
return (getGeneration() >= EVERGREEN);
}
bool hasBFM() const {
return hasBFE();
}

2
lib/Target/R600/EvergreenInstructions.td
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@ -295,7 +295,7 @@ def : Pat<(i32 (sext_inreg i32:$src, i8)),
def : Pat<(i32 (sext_inreg i32:$src, i16)),
(BFE_INT_eg i32:$src, (i32 ZERO), (MOV_IMM_I32 16))>;
defm : BFIPatterns <BFI_INT_eg>;
defm : BFIPatterns <BFI_INT_eg, MOV_IMM_I32>;
def BFM_INT_eg : R600_2OP <0xA0, "BFM_INT",
[(set i32:$dst, (AMDGPUbfm i32:$src0, i32:$src1))],

2
lib/Target/R600/SIInstructions.td
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@ -2112,7 +2112,7 @@ def : Pat <
(V_MUL_HI_I32 $src0, $src1, (i32 0))
>;
defm : BFIPatterns <V_BFI_B32>;
defm : BFIPatterns <V_BFI_B32, S_MOV_B32>;
def : ROTRPattern <V_ALIGNBIT_B32>;
/********** ======================= **********/

50
test/CodeGen/R600/fcopysign.f32.ll Normal file
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@ -0,0 +1,50 @@
; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
declare float @llvm.copysign.f32(float, float) nounwind readnone
declare <2 x float> @llvm.copysign.v2f32(<2 x float>, <2 x float>) nounwind readnone
declare <4 x float> @llvm.copysign.v4f32(<4 x float>, <4 x float>) nounwind readnone
; Try to identify arg based on higher address.
; FUNC-LABEL: @test_copysign_f32:
; SI: S_LOAD_DWORD [[SSIGN:s[0-9]+]], {{.*}} 0xc
; SI: V_MOV_B32_e32 [[VSIGN:v[0-9]+]], [[SSIGN]]
; SI-DAG: S_LOAD_DWORD [[SMAG:s[0-9]+]], {{.*}} 0xb
; SI-DAG: V_MOV_B32_e32 [[VMAG:v[0-9]+]], [[SMAG]]
; SI-DAG: S_MOV_B32 [[SCONST:s[0-9]+]], 0x7fffffff
; SI: V_BFI_B32 [[RESULT:v[0-9]+]], [[SCONST]], [[VMAG]], [[VSIGN]]
; SI: BUFFER_STORE_DWORD [[RESULT]],
; SI: S_ENDPGM
; EG: BFI_INT
define void @test_copysign_f32(float addrspace(1)* %out, float %mag, float %sign) nounwind {
%result = call float @llvm.copysign.f32(float %mag, float %sign)
store float %result, float addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: @test_copysign_v2f32:
; SI: S_ENDPGM
; EG: BFI_INT
; EG: BFI_INT
define void @test_copysign_v2f32(<2 x float> addrspace(1)* %out, <2 x float> %mag, <2 x float> %sign) nounwind {
%result = call <2 x float> @llvm.copysign.v2f32(<2 x float> %mag, <2 x float> %sign)
store <2 x float> %result, <2 x float> addrspace(1)* %out, align 8
ret void
}
; FUNC-LABEL: @test_copysign_v4f32:
; SI: S_ENDPGM
; EG: BFI_INT
; EG: BFI_INT
; EG: BFI_INT
; EG: BFI_INT
define void @test_copysign_v4f32(<4 x float> addrspace(1)* %out, <4 x float> %mag, <4 x float> %sign) nounwind {
%result = call <4 x float> @llvm.copysign.v4f32(<4 x float> %mag, <4 x float> %sign)
store <4 x float> %result, <4 x float> addrspace(1)* %out, align 16
ret void
}

37
test/CodeGen/R600/fcopysign.f64.ll Normal file
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@ -0,0 +1,37 @@
; RUN: llc -march=r600 -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
declare double @llvm.copysign.f64(double, double) nounwind readnone
declare <2 x double> @llvm.copysign.v2f64(<2 x double>, <2 x double>) nounwind readnone
declare <4 x double> @llvm.copysign.v4f64(<4 x double>, <4 x double>) nounwind readnone
; FUNC-LABEL: @test_copysign_f64:
; SI-DAG: S_LOAD_DWORDX2 s{{\[}}[[SSIGN_LO:[0-9]+]]:[[SSIGN_HI:[0-9]+]]{{\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0xd
; SI: V_MOV_B32_e32 v[[VSIGN_HI:[0-9]+]], s[[SSIGN_HI]]
; SI-DAG: S_LOAD_DWORDX2 s{{\[}}[[SMAG_LO:[0-9]+]]:[[SMAG_HI:[0-9]+]]{{\]}}, s{{\[[0-9]+:[0-9]+\]}}, 0xb
; SI-DAG: V_MOV_B32_e32 v[[VMAG_HI:[0-9]+]], s[[SMAG_HI]]
; SI-DAG: S_MOV_B32 [[SCONST:s[0-9]+]], 0x7fffffff
; SI: V_BFI_B32 v[[VRESULT_HI:[0-9]+]], [[SCONST]], v[[VMAG_HI]], v[[VSIGN_HI]]
; SI: V_MOV_B32_e32 v[[VMAG_LO:[0-9]+]], s[[SMAG_LO]]
; SI: BUFFER_STORE_DWORDX2 v{{\[}}[[VMAG_LO]]:[[VRESULT_HI]]{{\]}}
; SI: S_ENDPGM
define void @test_copysign_f64(double addrspace(1)* %out, double %mag, double %sign) nounwind {
%result = call double @llvm.copysign.f64(double %mag, double %sign)
store double %result, double addrspace(1)* %out, align 8
ret void
}
; FUNC-LABEL: @test_copysign_v2f64:
; SI: S_ENDPGM
define void @test_copysign_v2f64(<2 x double> addrspace(1)* %out, <2 x double> %mag, <2 x double> %sign) nounwind {
%result = call <2 x double> @llvm.copysign.v2f64(<2 x double> %mag, <2 x double> %sign)
store <2 x double> %result, <2 x double> addrspace(1)* %out, align 8
ret void
}
; FUNC-LABEL: @test_copysign_v4f64:
; SI: S_ENDPGM
define void @test_copysign_v4f64(<4 x double> addrspace(1)* %out, <4 x double> %mag, <4 x double> %sign) nounwind {
%result = call <4 x double> @llvm.copysign.v4f64(<4 x double> %mag, <4 x double> %sign)
store <4 x double> %result, <4 x double> addrspace(1)* %out, align 8
ret void
}