33 lines
936 B
C++
33 lines
936 B
C++
/*
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Copyright (c) 2013 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#include "util/test.h"
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#include "util/bit_tricks.h"
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using namespace lean;
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static void tst1() {
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lean_assert(log2(255u) == 7);
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lean_assert(log2(256u) == 8);
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lean_assert(log2(257u) == 8);
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lean_assert(log2(321u) == 8);
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lean_assert(log2(520u) == 9);
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lean_assert(log2(65535u) == 15);
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lean_assert(log2(65536u) == 16);
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lean_assert(log2(65537u) == 16);
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lean_assert(log2(5203939u) == 22);
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lean_assert(log2(10309482u) == 23);
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lean_assert(log2(41039392u) == 25);
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lean_assert(log2(213469392u) == 27);
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lean_assert(log2(1293828727u) == 30);
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lean_assert(log2(1073741824u) == 30);
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lean_assert(log2(2147483648u) == 31);
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lean_assert(log2(4294967295u) == 31);
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}
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int main() {
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tst1();
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return has_violations() ? 1 : 0;
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}
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