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#include <catch2/catch.hpp>
#include <vcpkg/base/uint128.h>
TEST_CASE ("uint128 constructor and assign", "[uint128]")
{
vcpkg::UInt128 x = 120;
REQUIRE(x.bottom_64_bits() == 120);
REQUIRE(x.top_64_bits() == 0);
x = 3201;
REQUIRE(x.bottom_64_bits() == 3201);
REQUIRE(x.top_64_bits() == 0);
x = 0xFFFF'FFFF'FFFF'FFFF;
REQUIRE(x.bottom_64_bits() == 0xFFFF'FFFF'FFFF'FFFF);
REQUIRE(x.top_64_bits() == 0);
}
TEST_CASE ("uint128 add-assign", "[uint128]")
{
vcpkg::UInt128 x = 0xFFFF'FFFF'FFFF'FFFF;
x += 1;
REQUIRE(x.bottom_64_bits() == 0);
REQUIRE(x.top_64_bits() == 1);
}
TEST_CASE ("uint128 shl-assign", "[uint128]")
{
vcpkg::UInt128 x = 0xFFFF'FFFF'FFFF'FFFF;
x <<= 32;
REQUIRE(x.bottom_64_bits() == 0xFFFF'FFFF'0000'0000);
REQUIRE(x.top_64_bits() == 0x0000'0000'FFFF'FFFF);
x <<= 60;
REQUIRE(x.bottom_64_bits() == 0);
REQUIRE(x.top_64_bits() == 0xFFFF'FFFF'F000'0000);
x = 1;
x <<= 96;
REQUIRE(x.bottom_64_bits() == 0);
REQUIRE(x.top_64_bits() == (uint64_t(1) << 32));
}
TEST_CASE ("uint128 shr-assign", "[uint128]")
{
vcpkg::UInt128 x = 0xFFFF'FFFF'FFFF'FFFF;
x <<= 64;
REQUIRE(x.bottom_64_bits() == 0x0000'0000'0000'0000);
REQUIRE(x.top_64_bits() == 0xFFFF'FFFF'FFFF'FFFF);
x >>= 32;
REQUIRE(x.bottom_64_bits() == 0xFFFF'FFFF'0000'0000);
REQUIRE(x.top_64_bits() == 0x0000'0000'FFFF'FFFF);
x >>= 60;
REQUIRE(x.bottom_64_bits() == 0x0000'000F'FFFF'FFFF);
REQUIRE(x.top_64_bits() == 0x0000'0000'0000'0000);
x = 0x8000'0000'0000'0000;
x <<= 64;
REQUIRE(x.bottom_64_bits() == 0);
REQUIRE(x.top_64_bits() == 0x8000'0000'0000'0000);
x >>= 96;
REQUIRE(x.bottom_64_bits() == (uint64_t(1) << 31));
REQUIRE(x.top_64_bits() == 0);
}
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