1 ; RUN: llc -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN -check-prefix=FUNC %s
2 ; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=VI -check-prefix=GCN -check-prefix=FUNC %s
3 ; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck -check-prefix=R600 -check-prefix=FUNC %s
5 ; FUNC-LABEL: {{^}}s_fneg_f32:
9 define amdgpu_kernel void @s_fneg_f32(float addrspace(1)* %out, float %in) {
10 %fneg = fsub float -0.000000e+00, %in
11 store float %fneg, float addrspace(1)* %out
15 ; FUNC-LABEL: {{^}}s_fneg_v2f32:
21 define amdgpu_kernel void @s_fneg_v2f32(<2 x float> addrspace(1)* nocapture %out, <2 x float> %in) {
22 %fneg = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, %in
23 store <2 x float> %fneg, <2 x float> addrspace(1)* %out
27 ; FUNC-LABEL: {{^}}s_fneg_v4f32:
37 define amdgpu_kernel void @s_fneg_v4f32(<4 x float> addrspace(1)* nocapture %out, <4 x float> %in) {
38 %fneg = fsub <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>, %in
39 store <4 x float> %fneg, <4 x float> addrspace(1)* %out
43 ; DAGCombiner will transform:
44 ; (fneg (f32 bitcast (i32 a))) => (f32 bitcast (xor (i32 a), 0x80000000))
45 ; unless the target returns true for isNegFree()
47 ; FUNC-LABEL: {{^}}fsub0_f32:
49 ; GCN: v_sub_f32_e64 v{{[0-9]}}, 0, s{{[0-9]+$}}
53 define amdgpu_kernel void @fsub0_f32(float addrspace(1)* %out, i32 %in) {
54 %bc = bitcast i32 %in to float
55 %fsub = fsub float 0.0, %bc
56 store float %fsub, float addrspace(1)* %out
59 ; FUNC-LABEL: {{^}}fneg_free_f32:
60 ; SI: s_load_dword [[NEG_VALUE:s[0-9]+]], s[{{[0-9]+:[0-9]+}}], 0xb
61 ; VI: s_load_dword [[NEG_VALUE:s[0-9]+]], s[{{[0-9]+:[0-9]+}}], 0x2c
63 ; GCN: v_bfrev_b32_e32 [[SIGNBIT:v[0-9]+]], 1{{$}}
64 ; GCN: v_xor_b32_e32 [[RES:v[0-9]+]], [[NEG_VALUE]], [[SIGNBIT]]
65 ; GCN: buffer_store_dword [[RES]]
69 define amdgpu_kernel void @fneg_free_f32(float addrspace(1)* %out, i32 %in) {
70 %bc = bitcast i32 %in to float
71 %fsub = fsub float -0.0, %bc
72 store float %fsub, float addrspace(1)* %out
76 ; FUNC-LABEL: {{^}}fneg_fold_f32:
77 ; SI: s_load_dword [[NEG_VALUE:s[0-9]+]], s[{{[0-9]+:[0-9]+}}], 0xb
78 ; VI: s_load_dword [[NEG_VALUE:s[0-9]+]], s[{{[0-9]+:[0-9]+}}], 0x2c
80 ; GCN: v_mul_f32_e64 v{{[0-9]+}}, -[[NEG_VALUE]], [[NEG_VALUE]]
81 define amdgpu_kernel void @fneg_fold_f32(float addrspace(1)* %out, float %in) {
82 %fsub = fsub float -0.0, %in
83 %fmul = fmul float %fsub, %in
84 store float %fmul, float addrspace(1)* %out
88 ; Make sure we turn some integer operations back into fabs
89 ; FUNC-LABEL: {{^}}bitpreserve_fneg_f32:
90 ; GCN: v_mul_f32_e64 v{{[0-9]+}}, s{{[0-9]+}}, -4.0
91 define amdgpu_kernel void @bitpreserve_fneg_f32(float addrspace(1)* %out, float %in) {
92 %in.bc = bitcast float %in to i32
93 %int.abs = xor i32 %in.bc, 2147483648
94 %bc = bitcast i32 %int.abs to float
95 %fadd = fmul float %bc, 4.0
96 store float %fadd, float addrspace(1)* %out