blob: edfdc7e64e8f592b841b057139c7ea44ffa6604a [file] [log] [blame]
; 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
}