llvm-project/llvm/test/CodeGen/AMDGPU/divergence-driven-bfe-isel.ll

26 lines
762 B
LLVM

; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
; GCN_LABEL: @bfe_uniform
; GCN: s_bfe_u32 s{{[0-9]+}}, s{{[0-9]+}}, 0x40010
define amdgpu_kernel void @bfe_uniform(i32 %val, i32 addrspace(1)* %out) {
%hibits = lshr i32 %val, 16
%masked = and i32 %hibits, 15
store i32 %masked, i32 addrspace(1)* %out
ret void
}
; GCN_LABEL: @bfe_divergent
; GCN: v_bfe_u32 v{{[0-9]+}}, v{{[0-9]+}}, 16, 4
define amdgpu_kernel void @bfe_divergent(i32 %val, i32 addrspace(1)* %out) {
%tid = call i32 @llvm.amdgcn.workitem.id.x()
%divergent = add i32 %val, %tid
%hibits = lshr i32 %divergent, 16
%masked = and i32 %hibits, 15
store i32 %masked, i32 addrspace(1)* %out
ret void
}
declare i32 @llvm.amdgcn.workitem.id.x()