| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2 |
| ; RUN: llc -mattr=mul,movw < %s -mtriple=avr | FileCheck %s |
| |
| ; Tests lowering of multiplication to hardware instructions. |
| |
| define i8 @mult8(i8 %a, i8 %b) { |
| ; CHECK-LABEL: mult8: |
| ; CHECK: ; %bb.0: |
| ; CHECK-NEXT: muls r22, r24 |
| ; CHECK-NEXT: clr r1 |
| ; CHECK-NEXT: mov r24, r0 |
| ; CHECK-NEXT: ret |
| %mul = mul i8 %b, %a |
| ret i8 %mul |
| } |
| |
| define i16 @mult16(i16 %a, i16 %b) { |
| ; CHECK-LABEL: mult16: |
| ; CHECK: ; %bb.0: |
| ; CHECK-NEXT: muls r22, r25 |
| ; CHECK-NEXT: mov r25, r0 |
| ; CHECK-NEXT: clr r1 |
| ; CHECK-NEXT: mul r22, r24 |
| ; CHECK-NEXT: mov r20, r0 |
| ; CHECK-NEXT: mov r18, r1 |
| ; CHECK-NEXT: clr r1 |
| ; CHECK-NEXT: add r18, r25 |
| ; CHECK-NEXT: muls r23, r24 |
| ; CHECK-NEXT: clr r1 |
| ; CHECK-NEXT: add r18, r0 |
| ; CHECK-NEXT: mov r19, r18 |
| ; CHECK-NEXT: clr r18 |
| ; CHECK-NEXT: mov r24, r20 |
| ; CHECK-NEXT: clr r25 |
| ; CHECK-NEXT: or r24, r18 |
| ; CHECK-NEXT: or r25, r19 |
| ; CHECK-NEXT: ret |
| %mul = mul nsw i16 %b, %a |
| ret i16 %mul |
| } |