38 lines
764 B
Go
38 lines
764 B
Go
package sys_test
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import (
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"runtime/internal/sys"
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"testing"
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)
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func TestCtz64(t *testing.T) {
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for i := 0; i <= 64; i++ {
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x := uint64(5) << uint(i)
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if got := sys.Ctz64(x); got != i {
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t.Errorf("Ctz64(%d)=%d, want %d", x, got, i)
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}
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}
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}
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func TestCtz32(t *testing.T) {
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for i := 0; i <= 32; i++ {
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x := uint32(5) << uint(i)
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if got := sys.Ctz32(x); got != i {
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t.Errorf("Ctz32(%d)=%d, want %d", x, got, i)
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}
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}
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}
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func TestBswap64(t *testing.T) {
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x := uint64(0x1122334455667788)
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y := sys.Bswap64(x)
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if y != 0x8877665544332211 {
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t.Errorf("Bswap(%x)=%x, want 0x8877665544332211", x, y)
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}
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}
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func TestBswap32(t *testing.T) {
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x := uint32(0x11223344)
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y := sys.Bswap32(x)
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if y != 0x44332211 {
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t.Errorf("Bswap(%x)=%x, want 0x44332211", x, y)
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}
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}
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