source: icGREP/icgrep-devel/llvm-3.8.0.src/test/CodeGen/AMDGPU/bfe_uint.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 756 bytes
Line 
1; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
2
3; CHECK: {{^}}bfe_def:
4; CHECK: BFE_UINT
5define void @bfe_def(i32 addrspace(1)* %out, i32 %x) {
6entry:
7  %0 = lshr i32 %x, 5
8  %1 = and i32 %0, 15 ; 0xf
9  store i32 %1, i32 addrspace(1)* %out
10  ret void
11}
12
13; This program could be implemented using a BFE_UINT instruction, however
14; since the lshr constant + number of bits in the mask is >= 32, it can also be
15; implmented with a LSHR instruction, which is better, because LSHR has less
16; operands and requires less constants.
17
18; CHECK: {{^}}bfe_shift:
19; CHECK-NOT: BFE_UINT
20define void @bfe_shift(i32 addrspace(1)* %out, i32 %x) {
21entry:
22  %0 = lshr i32 %x, 16
23  %1 = and i32 %0, 65535 ; 0xffff
24  store i32 %1, i32 addrspace(1)* %out
25  ret void
26}
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