1 ; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s 2 3 ; XFAIL: * 4 5 ; CHECK: @bfe_def 6 ; CHECK: BFE_UINT 7 define void @bfe_def(i32 addrspace(1)* %out, i32 %x) { 8 entry: 9 %0 = lshr i32 %x, 5 10 %1 = and i32 %0, 15 ; 0xf 11 store i32 %1, i32 addrspace(1)* %out 12 ret void 13 } 14 15 ; This program could be implemented using a BFE_UINT instruction, however 16 ; since the lshr constant + number of bits in the mask is >= 32, it can also be 17 ; implmented with a LSHR instruction, which is better, because LSHR has less 18 ; operands and requires less constants. 19 20 ; CHECK: @bfe_shift 21 ; CHECK-NOT: BFE_UINT 22 define void @bfe_shift(i32 addrspace(1)* %out, i32 %x) { 23 entry: 24 %0 = lshr i32 %x, 16 25 %1 = and i32 %0, 65535 ; 0xffff 26 store i32 %1, i32 addrspace(1)* %out 27 ret void 28 } 29
