mirror of
https://github.com/golang/go
synced 2024-11-22 23:50:03 -07:00
42 lines
677 B
Go
42 lines
677 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2024 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 main() {
|
||
|
|
testMod()
|
||
|
|
testMul()
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func mod3(x uint32) uint64 {
|
||
|
|
return uint64(x % 3)
|
||
|
|
}
|
||
|
|
|
||
|
|
func testMod() {
|
||
|
|
got := mod3(1<<32 - 1)
|
||
|
|
want := uint64((1<<32 - 1) % 3)
|
||
|
|
if got != want {
|
||
|
|
fmt.Printf("testMod: got %x want %x\n", got, want)
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func mul3(a uint32) uint64 {
|
||
|
|
return uint64(a * 3)
|
||
|
|
}
|
||
|
|
|
||
|
|
func testMul() {
|
||
|
|
got := mul3(1<<32 - 1)
|
||
|
|
want := uint64((1<<32-1)*3 - 2<<32)
|
||
|
|
if got != want {
|
||
|
|
fmt.Printf("testMul: got %x want %x\n", got, want)
|
||
|
|
}
|
||
|
|
}
|