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; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s
; CHECK: @bfe_def
; CHECK: BFE_UINT
define void @bfe_def(i32 addrspace(1)* %out, i32 %x) {
entry:
%0 = lshr i32 %x, 5
%1 = and i32 %0, 15 ; 0xf
store i32 %1, i32 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 void @bfe_shift(i32 addrspace(1)* %out, i32 %x) {
entry:
%0 = lshr i32 %x, 16
%1 = and i32 %0, 65535 ; 0xffff
store i32 %1, i32 addrspace(1)* %out
ret void
}
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