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Added saturateCast. (#354)

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This commit is contained in:
Branimir Karadžić
2025-12-13 11:05:24 -08:00
committed by GitHub
parent 5dc415ee2e
commit 4ac903bdcf
3 changed files with 164 additions and 3 deletions
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98
tests/cast_test.cpp
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@@ -21,3 +21,101 @@ TEST_CASE("Narrow cast", "[cast]")
REQUIRE_ASSERTS(bx::narrowCast<int8_t>(uint32_t(128) ) );
REQUIRE(128 == bx::narrowCast<uint8_t>(int32_t(128) ) );
}
template<typename Ty, typename FromT>
inline constexpr bool saturateCastTest(Ty _expectedMin, Ty _expectedMax)
{
return true
&& _expectedMin == bx::saturateCast<Ty>(static_cast<FromT>(_expectedMin) )
&& _expectedMax == bx::saturateCast<Ty>(static_cast<FromT>(_expectedMax) )
;
}
TEST_CASE("Saturate cast", "[cast]")
{
STATIC_REQUIRE(-128 == bx::saturateCast<int8_t >( int32_t( -255) ) );
STATIC_REQUIRE( 127 == bx::saturateCast<int8_t >( int32_t( 255) ) );
STATIC_REQUIRE( 127 == bx::saturateCast<int8_t >( int32_t( 127) ) );
STATIC_REQUIRE( 127 == bx::saturateCast<int8_t >( int32_t( 128) ) );
STATIC_REQUIRE( 127 == bx::saturateCast<int8_t >(uint32_t( 128) ) );
STATIC_REQUIRE(-128 == bx::saturateCast<int8_t >( float(-1389.9831f) ) );
STATIC_REQUIRE( 127 == bx::saturateCast<int8_t >( float( 1389.9831f) ) );
STATIC_REQUIRE( 0 == bx::saturateCast<uint8_t>( int32_t( -128) ) );
STATIC_REQUIRE( 128 == bx::saturateCast<uint8_t>( int32_t( 128) ) );
STATIC_REQUIRE( -13 == bx::saturateCast<int8_t >( float( -13.89f) ) );
STATIC_REQUIRE( 13 == bx::saturateCast<int8_t >( float( 13.89f) ) );
STATIC_REQUIRE( 0 == bx::saturateCast<uint8_t>( float( -13.89f) ) );
STATIC_REQUIRE( 13 == bx::saturateCast<uint8_t>( float( 13.89f) ) );
STATIC_REQUIRE(saturateCastTest<int8_t, int8_t>(-128, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, uint8_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, int16_t>(-128, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, uint16_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, int32_t>(-128, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, uint32_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, int64_t>(-128, 127) );
STATIC_REQUIRE(saturateCastTest<int8_t, uint64_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<uint8_t, int8_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<uint8_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, int16_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, uint16_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, int32_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, uint32_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, int64_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint8_t, uint64_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<int16_t, int8_t>( -128, 127) );
STATIC_REQUIRE(saturateCastTest<int16_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<int16_t, int16_t>( -32768, 32767) );
STATIC_REQUIRE(saturateCastTest<int16_t, uint16_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<int16_t, int32_t>( -32768, 32767) );
STATIC_REQUIRE(saturateCastTest<int16_t, uint32_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<int16_t, int64_t>( -32768, 32767) );
STATIC_REQUIRE(saturateCastTest<int16_t, uint64_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<uint16_t, int8_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<uint16_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint16_t, int16_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<uint16_t, uint16_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint16_t, int32_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint16_t, uint32_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint16_t, int64_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint16_t, uint64_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<int32_t, int8_t>( -128, 127) );
STATIC_REQUIRE(saturateCastTest<int32_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<int32_t, int16_t>( -32768, 32767) );
STATIC_REQUIRE(saturateCastTest<int32_t, uint16_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<int32_t, int32_t>( -2147483648, 2147483647) );
STATIC_REQUIRE(saturateCastTest<int32_t, uint32_t>( 0, 2147483647) );
STATIC_REQUIRE(saturateCastTest<int32_t, int64_t>( -2147483648, 2147483647) );
STATIC_REQUIRE(saturateCastTest<int32_t, uint64_t>( 0, 2147483647) );
STATIC_REQUIRE(saturateCastTest<uint32_t, int8_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<uint32_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint32_t, int16_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<uint32_t, uint16_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint32_t, int32_t>( 0, 2147483647) );
STATIC_REQUIRE(saturateCastTest<uint32_t, uint32_t>( 0, 4294967295) );
STATIC_REQUIRE(saturateCastTest<uint32_t, int64_t>( 0, 4294967295) );
STATIC_REQUIRE(saturateCastTest<uint32_t, uint64_t>( 0, 4294967295) );
STATIC_REQUIRE(saturateCastTest<int64_t, int8_t>( -128, 127) );
STATIC_REQUIRE(saturateCastTest<int64_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<int64_t, int16_t>( -32768, 32767) );
STATIC_REQUIRE(saturateCastTest<int64_t, uint16_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<int64_t, int32_t>( -2147483648, 2147483647) );
STATIC_REQUIRE(saturateCastTest<int64_t, uint32_t>( 0, 4294967295) );
STATIC_REQUIRE(saturateCastTest<int64_t, int64_t>( -9223372036854775808ll, 9223372036854775807ll) );
STATIC_REQUIRE(saturateCastTest<int64_t, uint64_t>( 0, 9223372036854775807ll) );
STATIC_REQUIRE(saturateCastTest<uint64_t, int8_t>( 0, 127) );
STATIC_REQUIRE(saturateCastTest<uint64_t, uint8_t>( 0, 255) );
STATIC_REQUIRE(saturateCastTest<uint64_t, int16_t>( 0, 32767) );
STATIC_REQUIRE(saturateCastTest<uint64_t, uint16_t>( 0, 65535) );
STATIC_REQUIRE(saturateCastTest<uint64_t, int32_t>( 0, 2147483647) );
STATIC_REQUIRE(saturateCastTest<uint64_t, uint32_t>( 0, 4294967295) );
STATIC_REQUIRE(saturateCastTest<uint64_t, int64_t>( 0, 9223372036854775807ull) );
STATIC_REQUIRE(saturateCastTest<uint64_t, uint64_t>( 0, 18446744073709551615ull) );
}