mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-28 04:33:05 +00:00
37 lines
878 B
LLVM
37 lines
878 B
LLVM
|
; RUN: llc < %s -march=arm64 | FileCheck %s
|
||
|
|
|
||
|
|
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
|
||
|
|
target triple = "arm64-apple-ios7.0.0"
|
||
|
|
|
||
|
|
; Function Attrs: nounwind readnone
|
||
|
|
declare i32 @llvm.ctlz.i32(i32, i1) #0
|
||
|
|
declare i64 @llvm.ctlz.i64(i64, i1) #1
|
||
|
|
|
||
|
|
; Function Attrs: nounwind ssp
|
||
|
|
define i32 @clrsb32(i32 %x) #2 {
|
||
|
|
entry:
|
||
|
|
%shr = ashr i32 %x, 31
|
||
|
|
%xor = xor i32 %shr, %x
|
||
|
|
%mul = shl i32 %xor, 1
|
||
|
|
%add = or i32 %mul, 1
|
||
|
|
%0 = tail call i32 @llvm.ctlz.i32(i32 %add, i1 false)
|
||
|
|
|
||
|
|
ret i32 %0
|
||
|
|
; CHECK-LABEL: clrsb32
|
||
|
|
; CHECK: cls [[TEMP:w[0-9]+]], [[TEMP]]
|
||
|
|
}
|
||
|
|
|
||
|
|
; Function Attrs: nounwind ssp
|
||
|
|
define i64 @clrsb64(i64 %x) #3 {
|
||
|
|
entry:
|
||
|
|
%shr = ashr i64 %x, 63
|
||
|
|
%xor = xor i64 %shr, %x
|
||
|
|
%mul = shl nsw i64 %xor, 1
|
||
|
|
%add = or i64 %mul, 1
|
||
|
|
%0 = tail call i64 @llvm.ctlz.i64(i64 %add, i1 false)
|
||
|
|
|
||
|
|
ret i64 %0
|
||
|
|
; CHECK-LABEL: clrsb64
|
||
|
|
; CHECK: cls [[TEMP:x[0-9]+]], [[TEMP]]
|
||
|
|
}
|