blob: b7dfcd99029a081fa6194885db9aa6e99be43983 [file] [log] [blame]
; RUN: llc -march=amdgcn -enable-no-signed-zeros-fp-math=0 < %s | FileCheck -check-prefix=GCN -check-prefix=GCN-SAFE %s
; RUN: llc -march=amdgcn -enable-no-signed-zeros-fp-math=1 < %s | FileCheck -check-prefix=GCN -check-prefix=GCN-UNSAFE %s
; RUN: llc -march=amdgcn -enable-unsafe-fp-math < %s | FileCheck -check-prefix=GCN -check-prefix=GCN-UNSAFE %s
declare i32 @llvm.amdgcn.workitem.id.x() nounwind readnone
; Test that the -enable-no-signed-zeros-fp-math flag works
; GCN-LABEL: {{^}}fneg_fsub_f32:
; GCN: v_sub_f32_e32 [[SUB:v[0-9]+]], {{v[0-9]+}}, {{v[0-9]+}}
; GCN-SAFE: v_xor_b32_e32 v{{[0-9]+}}, 0x80000000, [[SUB]]
; GCN-UNSAFE-NOT: xor
define amdgpu_kernel void @fneg_fsub_f32(float addrspace(1)* %out, float addrspace(1)* %in) #0 {
%tid = call i32 @llvm.amdgcn.workitem.id.x()
%add = add i32 %tid, 1
%gep = getelementptr float, float addrspace(1)* %in, i32 %tid
%b_ptr = getelementptr float, float addrspace(1)* %in, i32 %add
%a = load float, float addrspace(1)* %gep, align 4
%b = load float, float addrspace(1)* %b_ptr, align 4
%result = fsub float %a, %b
%neg.result = fsub float -0.0, %result
store float %neg.result, float addrspace(1)* %out, align 4
ret void
}
attributes #0 = { nounwind }