1 files changed, 33 insertions, 0 deletions
diff --git a/test/CodeGen/AMDGPU/llvm.AMDGPU.rsq.ll b/test/CodeGen/AMDGPU/llvm.AMDGPU.rsq.ll
new file mode 100644
index 0000000000000..36b72f14db195
--- /dev/null
+++ b/test/CodeGen/AMDGPU/llvm.AMDGPU.rsq.ll
@@ -0,0 +1,33 @@
+; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
+; RUN: llc -march=r600 -mcpu=cypress -verify-machineinstrs < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
+
+declare float @llvm.AMDGPU.rsq.f32(float) nounwind readnone
+
+; FUNC-LABEL: {{^}}rsq_f32:
+; SI: v_rsq_f32_e32 {{v[0-9]+}}, {{s[0-9]+}}
+; EG: RECIPSQRT_IEEE
+define void @rsq_f32(float addrspace(1)* %out, float %src) nounwind {
+  %rsq = call float @llvm.AMDGPU.rsq.f32(float %src) nounwind readnone
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; TODO: Really these should be constant folded
+; FUNC-LABEL: {{^}}rsq_f32_constant_4.0
+; SI: v_rsq_f32_e32 {{v[0-9]+}}, 4.0
+; EG: RECIPSQRT_IEEE
+define void @rsq_f32_constant_4.0(float addrspace(1)* %out) nounwind {
+  %rsq = call float @llvm.AMDGPU.rsq.f32(float 4.0) nounwind readnone
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}
+
+; FUNC-LABEL: {{^}}rsq_f32_constant_100.0
+; SI: v_rsq_f32_e32 {{v[0-9]+}}, 0x42c80000
+; EG: RECIPSQRT_IEEE
+define void @rsq_f32_constant_100.0(float addrspace(1)* %out) nounwind {
+  %rsq = call float @llvm.AMDGPU.rsq.f32(float 100.0) nounwind readnone
+  store float %rsq, float addrspace(1)* %out, align 4
+  ret void
+}