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// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <catch2/catch.hpp>
#include <math.h>
#include "common/bit_util.h"
namespace Common {
inline u32 CTZ32(u32 value) {
u32 count = 0;
while (((value >> count) & 0xf) == 0 && count < 32)
count += 4;
while (((value >> count) & 1) == 0 && count < 32)
count++;
return count;
}
inline u64 CTZ64(u64 value) {
u64 count = 0;
while (((value >> count) & 0xf) == 0 && count < 64)
count += 4;
while (((value >> count) & 1) == 0 && count < 64)
count++;
return count;
}
TEST_CASE("BitUtils", "[common]") {
REQUIRE(Common::CountTrailingZeroes32(0) == CTZ32(0));
REQUIRE(Common::CountTrailingZeroes64(0) == CTZ64(0));
REQUIRE(Common::CountTrailingZeroes32(9) == CTZ32(9));
REQUIRE(Common::CountTrailingZeroes32(8) == CTZ32(8));
REQUIRE(Common::CountTrailingZeroes32(0x801000) == CTZ32(0x801000));
REQUIRE(Common::CountTrailingZeroes64(9) == CTZ64(9));
REQUIRE(Common::CountTrailingZeroes64(8) == CTZ64(8));
REQUIRE(Common::CountTrailingZeroes64(0x801000) == CTZ64(0x801000));
REQUIRE(Common::CountTrailingZeroes64(0x801000000000UL) == CTZ64(0x801000000000UL));
}
} // namespace Common
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