mirror of
https://github.com/golang/go
synced 2024-11-18 04:54:49 -07:00
31 lines
586 B
Go
31 lines
586 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2021 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
func f(x uint64) uint64 {
|
||
|
|
s := "\x04"
|
||
|
|
c := s[0]
|
||
|
|
return x - x<<c<<4
|
||
|
|
}
|
||
|
|
|
||
|
|
func g(x uint32) uint32 {
|
||
|
|
s := "\x04"
|
||
|
|
c := s[0]
|
||
|
|
return x - x<<c<<4
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
if want, got := uint64(0xffffffffffffff01), f(1); want != got {
|
||
|
|
panic(fmt.Sprintf("want %x got %x", want, got))
|
||
|
|
}
|
||
|
|
if want, got := uint32(0xffffff01), g(1); want != got {
|
||
|
|
panic(fmt.Sprintf("want %x got %x", want, got))
|
||
|
|
}
|
||
|
|
}
|