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AMDGPU: Implement f16 fcanonicalize 

llvm-svn: 290300
This commit is contained in:
Matt Arsenault 2016-12-22 03:05:37 +00:00
parent 4e55c1ec11
commit ce84130f85
4 changed files with 181 additions and 0 deletions
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1
llvm/lib/Target/AMDGPU/AMDGPUInstructions.td
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@ -391,6 +391,7 @@ int TWO_PI = 0x40c90fdb;
int PI = 0x40490fdb;
int TWO_PI_INV = 0x3e22f983;
int FP_UINT_MAX_PLUS_1 = 0x4f800000; // 1 << 32 in floating point encoding
int FP16_ONE = 0x3C00;
int FP32_ONE = 0x3f800000;
int FP32_NEG_ONE = 0xbf800000;
int FP64_ONE = 0x3ff0000000000000;

3
llvm/lib/Target/AMDGPU/SIISelLowering.cpp
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@ -3648,6 +3648,9 @@ SDValue SITargetLowering::performFCanonicalizeCombine(
if (VT == MVT::f64 && !Subtarget->hasFP64Denormals())
return DAG.getConstantFP(0.0, SDLoc(N), VT);
if (VT == MVT::f16 && !Subtarget->hasFP16Denormals())
return DAG.getConstantFP(0.0, SDLoc(N), VT);
}
if (C.isNaN()) {

5
llvm/lib/Target/AMDGPU/SIInstructions.td
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@ -1021,6 +1021,11 @@ defm : BFMPatterns <i32, S_BFM_B32, S_MOV_B32>;
def : BFEPattern <V_BFE_U32, S_MOV_B32>;
def : Pat<
(fcanonicalize f16:$src),
(V_MUL_F16_e64 0, (i32 CONST.FP16_ONE), 0, $src, 0, 0)
>;
def : Pat<
(fcanonicalize f32:$src),
(V_MUL_F32_e64 0, (i32 CONST.FP32_ONE), 0, $src, 0, 0)

172
llvm/test/CodeGen/AMDGPU/fcanonicalize.f16.ll Normal file
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@ -0,0 +1,172 @@
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
declare half @llvm.canonicalize.f16(half) #0
; GCN-LABEL: {{^}}v_test_canonicalize_var_f16:
; GCN: v_mul_f16_e32 [[REG:v[0-9]+]], 1.0, {{v[0-9]+}}
; GCN: buffer_store_short [[REG]]
define void @v_test_canonicalize_var_f16(half addrspace(1)* %out) #1 {
%val = load half, half addrspace(1)* %out
%canonicalized = call half @llvm.canonicalize.f16(half %val)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}s_test_canonicalize_var_f16:
; GCN: v_mul_f16_e64 [[REG:v[0-9]+]], 1.0, {{s[0-9]+}}
; GCN: buffer_store_short [[REG]]
define void @s_test_canonicalize_var_f16(half addrspace(1)* %out, i16 zeroext %val.arg) #1 {
%val = bitcast i16 %val.arg to half
%canonicalized = call half @llvm.canonicalize.f16(half %val)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_p0_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_p0_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0.0)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_n0_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0xffff8000{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_n0_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half -0.0)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_p1_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x3c00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_p1_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 1.0)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_n1_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0xffffbc00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_n1_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half -1.0)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_literal_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x4c00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_literal_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 16.0)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_no_denormals_fold_canonicalize_denormal0_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_no_denormals_fold_canonicalize_denormal0_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH03FF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_denormals_fold_canonicalize_denormal0_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x3ff{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_denormals_fold_canonicalize_denormal0_f16(half addrspace(1)* %out) #3 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH03FF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_no_denormals_fold_canonicalize_denormal1_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_no_denormals_fold_canonicalize_denormal1_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH83FF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_denormals_fold_canonicalize_denormal1_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0xffff83ff{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_denormals_fold_canonicalize_denormal1_f16(half addrspace(1)* %out) #3 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH83FF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_qnan_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7c00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_qnan_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH7C00)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_qnan_value_neg1_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_qnan_value_neg1_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half bitcast (i16 -1 to half))
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_qnan_value_neg2_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_qnan_value_neg2_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half bitcast (i16 -2 to half))
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_snan0_value_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_snan0_value_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH7C01)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_snan1_value_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_snan1_value_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xH7DFF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_snan2_value_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_snan2_value_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xHFDFF)
store half %canonicalized, half addrspace(1)* %out
ret void
}
; GCN-LABEL: {{^}}test_fold_canonicalize_snan3_value_f16:
; GCN: v_mov_b32_e32 [[REG:v[0-9]+]], 0x7e00{{$}}
; GCN: buffer_store_short [[REG]]
define void @test_fold_canonicalize_snan3_value_f16(half addrspace(1)* %out) #1 {
%canonicalized = call half @llvm.canonicalize.f16(half 0xHFC01)
store half %canonicalized, half addrspace(1)* %out
ret void
}
attributes #0 = { nounwind readnone }
attributes #1 = { nounwind }
attributes #2 = { nounwind "target-features"="-fp16-denormals,-fp16-denormals" }
attributes #3 = { nounwind "target-features"="+fp16-denormals,+fp64-denormals" }