1; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
2
3; FUNC-LABEL: {{^}}fneg_f64:
4; SI: v_xor_b32
5define void @fneg_f64(double addrspace(1)* %out, double %in) {
6  %fneg = fsub double -0.000000e+00, %in
7  store double %fneg, double addrspace(1)* %out
8  ret void
9}
10
11; FUNC-LABEL: {{^}}fneg_v2f64:
12; SI: v_xor_b32
13; SI: v_xor_b32
14define void @fneg_v2f64(<2 x double> addrspace(1)* nocapture %out, <2 x double> %in) {
15  %fneg = fsub <2 x double> <double -0.000000e+00, double -0.000000e+00>, %in
16  store <2 x double> %fneg, <2 x double> addrspace(1)* %out
17  ret void
18}
19
20; FUNC-LABEL: {{^}}fneg_v4f64:
21; R600: -PV
22; R600: -T
23; R600: -PV
24; R600: -PV
25
26; SI: v_xor_b32
27; SI: v_xor_b32
28; SI: v_xor_b32
29; SI: v_xor_b32
30define void @fneg_v4f64(<4 x double> addrspace(1)* nocapture %out, <4 x double> %in) {
31  %fneg = fsub <4 x double> <double -0.000000e+00, double -0.000000e+00, double -0.000000e+00, double -0.000000e+00>, %in
32  store <4 x double> %fneg, <4 x double> addrspace(1)* %out
33  ret void
34}
35
36; DAGCombiner will transform:
37; (fneg (f64 bitcast (i64 a))) => (f64 bitcast (xor (i64 a), 0x80000000))
38; unless the target returns true for isNegFree()
39
40; FUNC-LABEL: {{^}}fneg_free_f64:
41; FIXME: Unnecessary copy to VGPRs
42; SI: v_add_f64 {{v\[[0-9]+:[0-9]+\]}}, {{v\[[0-9]+:[0-9]+\]}}, -{{v\[[0-9]+:[0-9]+\]$}}
43define void @fneg_free_f64(double addrspace(1)* %out, i64 %in) {
44  %bc = bitcast i64 %in to double
45  %fsub = fsub double 0.0, %bc
46  store double %fsub, double addrspace(1)* %out
47  ret void
48}
49
50; SI-LABEL: {{^}}fneg_fold_f64:
51; SI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0xb
52; SI-NOT: xor
53; SI: v_mul_f64 {{v\[[0-9]+:[0-9]+\]}}, -[[NEG_VALUE]], [[NEG_VALUE]]
54define void @fneg_fold_f64(double addrspace(1)* %out, double %in) {
55  %fsub = fsub double -0.0, %in
56  %fmul = fmul double %fsub, %in
57  store double %fmul, double addrspace(1)* %out
58  ret void
59}
60