| // 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)) |
| } |
| } |
