File size: 984 Bytes
f7a7bb1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | // Copyright 2016 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 sys_test
import (
"internal/runtime/sys"
"testing"
)
func TestTrailingZeros64(t *testing.T) {
for i := 0; i <= 64; i++ {
x := uint64(5) << uint(i)
if got := sys.TrailingZeros64(x); got != i {
t.Errorf("TrailingZeros64(%d)=%d, want %d", x, got, i)
}
}
}
func TestTrailingZeros32(t *testing.T) {
for i := 0; i <= 32; i++ {
x := uint32(5) << uint(i)
if got := sys.TrailingZeros32(x); got != i {
t.Errorf("TrailingZeros32(%d)=%d, want %d", x, got, i)
}
}
}
func TestBswap64(t *testing.T) {
x := uint64(0x1122334455667788)
y := sys.Bswap64(x)
if y != 0x8877665544332211 {
t.Errorf("Bswap(%x)=%x, want 0x8877665544332211", x, y)
}
}
func TestBswap32(t *testing.T) {
x := uint32(0x11223344)
y := sys.Bswap32(x)
if y != 0x44332211 {
t.Errorf("Bswap(%x)=%x, want 0x44332211", x, y)
}
}
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