| // 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) |
| } |
| } |
