mirror of
https://github.com/JGRennison/OpenTTD-patches.git
synced 2024-11-16 00:12:51 +00:00
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
|
/*
|
||
|
|
* This file is part of OpenTTD.
|
||
|
|
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
|
||
|
|
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
|
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** @file bitmath_func_test.cpp Test functionality from core/bitmath_func. */
|
||
|
|
|
||
|
|
#include "../stdafx.h"
|
||
|
|
|
||
|
|
#include "../3rdparty/catch2/catch.hpp"
|
||
|
|
|
||
|
|
#include "../core/bitmath_func.hpp"
|
||
|
|
|
||
|
|
extern uint8 FindLastBit64(uint64 x);
|
||
|
|
|
||
|
|
TEST_CASE("FindLastBit tests")
|
||
|
|
{
|
||
|
|
CHECK(FindLastBit<uint8>(0) == 0);
|
||
|
|
CHECK(FindLastBit<uint16>(0) == 0);
|
||
|
|
CHECK(FindLastBit<uint32>(0) == 0);
|
||
|
|
CHECK(FindLastBit<uint64>(0) == 0);
|
||
|
|
CHECK(FindLastBit64(0) == 0);
|
||
|
|
|
||
|
|
for (uint i = 0; i < 8; i++) {
|
||
|
|
uint8 t = (uint8)(1 << i);
|
||
|
|
CHECK(FindLastBit<uint8>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint16>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint32>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint64>(t) == i);
|
||
|
|
CHECK(FindLastBit64(t) == i);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (uint i = 8; i < 16; i++) {
|
||
|
|
uint16 t = (uint16)(1 << i);
|
||
|
|
CHECK(FindLastBit<uint16>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint32>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint64>(t) == i);
|
||
|
|
CHECK(FindLastBit64(t) == i);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (uint i = 16; i < 32; i++) {
|
||
|
|
uint32 t = (1 << i);
|
||
|
|
CHECK(FindLastBit<uint32>(t) == i);
|
||
|
|
CHECK(FindLastBit<uint64>(t) == i);
|
||
|
|
CHECK(FindLastBit64(t) == i);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (uint i = 32; i < 64; i++) {
|
||
|
|
uint64 t = (((uint64)1) << i);
|
||
|
|
CHECK(FindLastBit<uint64>(t) == i);
|
||
|
|
CHECK(FindLastBit64(t) == i);
|
||
|
|
}
|
||
|
|
|
||
|
|
CHECK(FindLastBit(0x42) == FindLastBit(0x40));
|
||
|
|
CHECK(FindLastBit(0xAAAA) == FindLastBit(0x8000));
|
||
|
|
}
|