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