1 ; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s 2 3 ; CHECK: {{^}}bfe_def: 4 ; CHECK: BFE_UINT 5 define void @bfe_def(i32 addrspace(1)* %out, i32 %x) { 6 entry: 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 20 define void @bfe_shift(i32 addrspace(1)* %out, i32 %x) { 21 entry: 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 } 27
