| ; RUN: llc -mattr=mul,movw < %s -march=avr | FileCheck %s | |
| ; Tests lowering of multiplication to hardware instructions. | |
| define i8 @mult8(i8 %a, i8 %b) { | |
| ; CHECK-LABEL: mult8: | |
| ; CHECK: muls r22, r24 | |
| ; CHECK: clr r1 | |
| ; CHECK: mov r24, r0 | |
| %mul = mul i8 %b, %a | |
| ret i8 %mul | |
| } | |
| define i16 @mult16(i16 %a, i16 %b) { | |
| ; CHECK-LABEL: mult16: | |
| ; CHECK: muls r22, r25 | |
| ; CHECK: mov r20, r0 | |
| ; CHECK: mul r22, r24 | |
| ; CHECK: mov r21, r0 | |
| ; CHECK: mov r18, r1 | |
| ; CHECK: clr r1 | |
| ; CHECK: add r18, r20 | |
| ; CHECK: muls r23, r24 | |
| ; CHECK: clr r1 | |
| ; CHECK: add r18, r0 | |
| ; :TODO: finish after reworking shift instructions | |
| %mul = mul nsw i16 %b, %a | |
| ret i16 %mul | |
| } |