go zeroextension_test 源码
golang zeroextension_test 代码
文件路径：/src/cmd/compile/internal/ssa/zeroextension_test.go
// Copyright 2018 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 ssa
import "testing"
type extTest struct {
f func(uint64, uint64) uint64
arg1 uint64
arg2 uint64
res uint64
name string
}
var extTests = [...]extTest{
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 / op2)) }, arg1: 0x1, arg2: 0xfffffffeffffffff, res: 0xffffffff, name: "div"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 * op2)) }, arg1: 0x1, arg2: 0x100000001, res: 0x1, name: "mul"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 + op2)) }, arg1: 0x1, arg2: 0xeeeeeeeeffffffff, res: 0x0, name: "add"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 - op2)) }, arg1: 0x1, arg2: 0xeeeeeeeeffffffff, res: 0x2, name: "sub"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 | op2)) }, arg1: 0x100000000000001, arg2: 0xfffffffffffffff, res: 0xffffffff, name: "or"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 ^ op2)) }, arg1: 0x100000000000001, arg2: 0xfffffffffffffff, res: 0xfffffffe, name: "xor"},
{f: func(a, b uint64) uint64 { op1 := int32(a); op2 := int32(b); return uint64(uint32(op1 & op2)) }, arg1: 0x100000000000001, arg2: 0x100000000000001, res: 0x1, name: "and"},
}
func TestZeroExtension(t *testing.T) {
for _, x := range extTests {
r := x.f(x.arg1, x.arg2)
if x.res != r {
t.Errorf("%s: got %d want %d", x.name, r, x.res)
}
}
}
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