1 ; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
3 ; FUNC-LABEL: {{^}}fneg_f64:
5 define 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
11 ; FUNC-LABEL: {{^}}fneg_v2f64:
14 define 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
20 ; FUNC-LABEL: {{^}}fneg_v4f64:
30 define 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
36 ; DAGCombiner will transform:
37 ; (fneg (f64 bitcast (i64 a))) => (f64 bitcast (xor (i64 a), 0x80000000))
38 ; unless the target returns true for isNegFree()
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\[[0-9]+:[0-9]+\]$}}
43 define 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
50 ; SI-LABEL: {{^}}fneg_fold_f64:
51 ; SI: s_load_dwordx2 [[NEG_VALUE:s\[[0-9]+:[0-9]+\]]], {{s\[[0-9]+:[0-9]+\]}}, 0xb
53 ; SI: v_mul_f64 {{v\[[0-9]+:[0-9]+\]}}, -[[NEG_VALUE]], [[NEG_VALUE]]
54 define 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