1 files changed, 86 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/usubo.ll b/llvm/test/CodeGen/AMDGPU/usubo.ll
new file mode 100644
index 00000000000..3c9b1622a07
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/usubo.ll
@@ -0,0 +1,86 @@
+; 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 { i32, i1 } @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone
+declare { i64, i1 } @llvm.usub.with.overflow.i64(i64, i64) nounwind readnone
+
+; FUNC-LABEL: {{^}}usubo_i64_zext:
+
+; EG: SUBB_UINT
+; EG: ADDC_UINT
+define void @usubo_i64_zext(i64 addrspace(1)* %out, i64 %a, i64 %b) nounwind {
+  %usub = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %a, i64 %b) nounwind
+  %val = extractvalue { i64, i1 } %usub, 0
+  %carry = extractvalue { i64, i1 } %usub, 1
+  %ext = zext i1 %carry to i64
+  %add2 = add i64 %val, %ext
+  store i64 %add2, i64 addrspace(1)* %out, align 8
+  ret void
+}
+
+; FUNC-LABEL: {{^}}s_usubo_i32:
+; SI: s_sub_i32
+
+; EG-DAG: SUBB_UINT
+; EG-DAG: SUB_INT
+define void @s_usubo_i32(i32 addrspace(1)* %out, i1 addrspace(1)* %carryout, i32 %a, i32 %b) nounwind {
+  %usub = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b) nounwind
+  %val = extractvalue { i32, i1 } %usub, 0
+  %carry = extractvalue { i32, i1 } %usub, 1
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i1 %carry, i1 addrspace(1)* %carryout
+  ret void
+}
+
+; FUNC-LABEL: {{^}}v_usubo_i32:
+; SI: v_subrev_i32_e32
+
+; EG-DAG: SUBB_UINT
+; EG-DAG: SUB_INT
+define void @v_usubo_i32(i32 addrspace(1)* %out, i1 addrspace(1)* %carryout, i32 addrspace(1)* %aptr, i32 addrspace(1)* %bptr) nounwind {
+  %a = load i32, i32 addrspace(1)* %aptr, align 4
+  %b = load i32, i32 addrspace(1)* %bptr, align 4
+  %usub = call { i32, i1 } @llvm.usub.with.overflow.i32(i32 %a, i32 %b) nounwind
+  %val = extractvalue { i32, i1 } %usub, 0
+  %carry = extractvalue { i32, i1 } %usub, 1
+  store i32 %val, i32 addrspace(1)* %out, align 4
+  store i1 %carry, i1 addrspace(1)* %carryout
+  ret void
+}
+
+; FUNC-LABEL: {{^}}s_usubo_i64:
+; SI: s_sub_u32
+; SI: s_subb_u32
+
+; EG-DAG: SUBB_UINT
+; EG-DAG: SUB_INT
+; EG-DAG: SUB_INT
+; EG: SUB_INT
+define void @s_usubo_i64(i64 addrspace(1)* %out, i1 addrspace(1)* %carryout, i64 %a, i64 %b) nounwind {
+  %usub = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %a, i64 %b) nounwind
+  %val = extractvalue { i64, i1 } %usub, 0
+  %carry = extractvalue { i64, i1 } %usub, 1
+  store i64 %val, i64 addrspace(1)* %out, align 8
+  store i1 %carry, i1 addrspace(1)* %carryout
+  ret void
+}
+
+; FUNC-LABEL: {{^}}v_usubo_i64:
+; SI: v_sub_i32
+; SI: v_subb_u32
+
+; EG-DAG: SUBB_UINT
+; EG-DAG: SUB_INT
+; EG-DAG: SUB_INT
+; EG: SUB_INT
+define void @v_usubo_i64(i64 addrspace(1)* %out, i1 addrspace(1)* %carryout, i64 addrspace(1)* %aptr, i64 addrspace(1)* %bptr) nounwind {
+  %a = load i64, i64 addrspace(1)* %aptr, align 4
+  %b = load i64, i64 addrspace(1)* %bptr, align 4
+  %usub = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %a, i64 %b) nounwind
+  %val = extractvalue { i64, i1 } %usub, 0
+  %carry = extractvalue { i64, i1 } %usub, 1
+  store i64 %val, i64 addrspace(1)* %out, align 8
+  store i1 %carry, i1 addrspace(1)* %carryout
+  ret void
+}