1 package sys_test 2 3 import ( 4 "runtime/internal/sys" 5 "testing" 6 ) 7 8 func TestCtz64(t *testing.T) { 9 for i := 0; i <= 64; i++ { 10 x := uint64(5) << uint(i) 11 if got := sys.Ctz64(x); got != i { 12 t.Errorf("Ctz64(%d)=%d, want %d", x, got, i) 13 } 14 } 15 } 16 func TestCtz32(t *testing.T) { 17 for i := 0; i <= 32; i++ { 18 x := uint32(5) << uint(i) 19 if got := sys.Ctz32(x); got != i { 20 t.Errorf("Ctz32(%d)=%d, want %d", x, got, i) 21 } 22 } 23 } 24 25 func TestBswap64(t *testing.T) { 26 x := uint64(0x1122334455667788) 27 y := sys.Bswap64(x) 28 if y != 0x8877665544332211 { 29 t.Errorf("Bswap(%x)=%x, want 0x8877665544332211", x, y) 30 } 31 } 32 func TestBswap32(t *testing.T) { 33 x := uint32(0x11223344) 34 y := sys.Bswap32(x) 35 if y != 0x44332211 { 36 t.Errorf("Bswap(%x)=%x, want 0x44332211", x, y) 37 } 38 } 39
