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intrinsics_test.go
// 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 ( "runtime/internal/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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