1; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
2; RUN: llc -march=r600 -mcpu=redwood < %s | FileCheck -check-prefix=R600 -check-prefix=FUNC %s
3
4; FUNC-LABEL: {{^}}fneg_f32:
5; R600: -PV
6
7; SI: v_xor_b32
8define void @fneg_f32(float addrspace(1)* %out, float %in) {
9  %fneg = fsub float -0.000000e+00, %in
10  store float %fneg, float addrspace(1)* %out
11  ret void
12}
13
14; FUNC-LABEL: {{^}}fneg_v2f32:
15; R600: -PV
16; R600: -PV
17
18; SI: v_xor_b32
19; SI: v_xor_b32
20define void @fneg_v2f32(<2 x float> addrspace(1)* nocapture %out, <2 x float> %in) {
21  %fneg = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, %in
22  store <2 x float> %fneg, <2 x float> addrspace(1)* %out
23  ret void
24}
25
26; FUNC-LABEL: {{^}}fneg_v4f32:
27; R600: -PV
28; R600: -T
29; R600: -PV
30; R600: -PV
31
32; SI: v_xor_b32
33; SI: v_xor_b32
34; SI: v_xor_b32
35; SI: v_xor_b32
36define void @fneg_v4f32(<4 x float> addrspace(1)* nocapture %out, <4 x float> %in) {
37  %fneg = fsub <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>, %in
38  store <4 x float> %fneg, <4 x float> addrspace(1)* %out
39  ret void
40}
41
42; DAGCombiner will transform:
43; (fneg (f32 bitcast (i32 a))) => (f32 bitcast (xor (i32 a), 0x80000000))
44; unless the target returns true for isNegFree()
45
46; FUNC-LABEL: {{^}}fneg_free_f32:
47; R600-NOT: XOR
48; R600: -KC0[2].Z
49
50; XXX: We could use v_add_f32_e64 with the negate bit here instead.
51; SI: v_sub_f32_e64 v{{[0-9]}}, 0, s{{[0-9]+$}}
52define void @fneg_free_f32(float addrspace(1)* %out, i32 %in) {
53  %bc = bitcast i32 %in to float
54  %fsub = fsub float 0.0, %bc
55  store float %fsub, float addrspace(1)* %out
56  ret void
57}
58
59; FUNC-LABEL: {{^}}fneg_fold_f32:
60; SI: s_load_dword [[NEG_VALUE:s[0-9]+]], s[{{[0-9]+:[0-9]+}}], 0xb
61; SI-NOT: xor
62; SI: v_mul_f32_e64 v{{[0-9]+}}, -[[NEG_VALUE]], [[NEG_VALUE]]
63define void @fneg_fold_f32(float addrspace(1)* %out, float %in) {
64  %fsub = fsub float -0.0, %in
65  %fmul = fmul float %fsub, %in
66  store float %fmul, float addrspace(1)* %out
67  ret void
68}
69