diff options
Diffstat (limited to 'test/CodeGen/AMDGPU/enable-no-signed-zeros-fp-math.ll')
| -rw-r--r-- | test/CodeGen/AMDGPU/enable-no-signed-zeros-fp-math.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/CodeGen/AMDGPU/enable-no-signed-zeros-fp-math.ll b/test/CodeGen/AMDGPU/enable-no-signed-zeros-fp-math.ll new file mode 100644 index 0000000000000..6eb1fc1d0cc29 --- /dev/null +++ b/test/CodeGen/AMDGPU/enable-no-signed-zeros-fp-math.ll @@ -0,0 +1,22 @@ +; 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 + +; Test that the -enable-no-signed-zeros-fp-math flag works + +; GCN-LABEL: {{^}}fneg_fsub_f32: +; GCN: v_subrev_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 { + %b_ptr = getelementptr float, float addrspace(1)* %in, i32 1 + %a = load float, float addrspace(1)* %in, 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 } |