Mercurial > hg > CbC > CbC_llvm
view llvm/test/CodeGen/AMDGPU/bfe_uint.ll @ 266:00f31e85ec16 default tip
Added tag current for changeset 31d058e83c98
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|
date | Sat, 14 Oct 2023 10:13:55 +0900 |
parents | 1f2b6ac9f198 |
children |
line wrap: on
line source
; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s ; CHECK: {{^}}bfe_def: ; CHECK: BFE_UINT define amdgpu_kernel void @bfe_def(ptr addrspace(1) %out, i32 %x) { entry: %0 = lshr i32 %x, 5 %1 = and i32 %0, 15 ; 0xf store i32 %1, ptr addrspace(1) %out ret void } ; This program could be implemented using a BFE_UINT instruction, however ; since the lshr constant + number of bits in the mask is >= 32, it can also be ; implmented with a LSHR instruction, which is better, because LSHR has less ; operands and requires less constants. ; CHECK: {{^}}bfe_shift: ; CHECK-NOT: BFE_UINT define amdgpu_kernel void @bfe_shift(ptr addrspace(1) %out, i32 %x) { entry: %0 = lshr i32 %x, 16 %1 = and i32 %0, 65535 ; 0xffff store i32 %1, ptr addrspace(1) %out ret void }