src/runtime/internal/sys/intrinsics_test.go

package sys_test

import (
	"runtime/internal/sys"
	"testing"
)

func TestCtz64(t *testing.T) {
	for i := uint(0); i <= 64; i++ {
		x := uint64(5) << i
		if got := sys.Ctz64(x); got != uint64(i) {
			t.Errorf("Ctz64(%d)=%d, want %d", x, got, i)
		}
	}
}
func TestCtz32(t *testing.T) {
	for i := uint(0); i <= 32; i++ {
		x := uint32(5) << i
		if got := sys.Ctz32(x); got != uint32(i) {
			t.Errorf("Ctz32(%d)=%d, want %d", x, got, i)
		}
	}
}
func TestCtz16(t *testing.T) {
	for i := uint(0); i <= 16; i++ {
		x := uint16(5) << i
		if got := sys.Ctz16(x); got != uint16(i) {
			t.Errorf("Ctz16(%d)=%d, want %d", x, got, i)
		}
	}
}
func TestCtz8(t *testing.T) {
	for i := uint(0); i <= 8; i++ {
		x := uint8(5) << i
		if got := sys.Ctz8(x); got != uint8(i) {
			t.Errorf("Ctz8(%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)
	}
}