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| author | Stefan Boberg <[email protected]> | 2023-05-02 10:01:47 +0200 |
|---|---|---|
| committer | GitHub <[email protected]> | 2023-05-02 10:01:47 +0200 |
| commit | 075d17f8ada47e990fe94606c3d21df409223465 (patch) | |
| tree | e50549b766a2f3c354798a54ff73404217b4c9af /src/zencore/intmath.cpp | |
| parent | fix: bundle shouldn't append content zip to zen (diff) | |
| download | zen-075d17f8ada47e990fe94606c3d21df409223465.tar.xz zen-075d17f8ada47e990fe94606c3d21df409223465.zip | |
moved source directories into `/src` (#264)
* moved source directories into `/src`
* updated bundle.lua for new `src` path
* moved some docs, icon
* removed old test trees
Diffstat (limited to 'src/zencore/intmath.cpp')
| -rw-r--r-- | src/zencore/intmath.cpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/zencore/intmath.cpp b/src/zencore/intmath.cpp new file mode 100644 index 000000000..5a686dc8e --- /dev/null +++ b/src/zencore/intmath.cpp @@ -0,0 +1,65 @@ +// Copyright Epic Games, Inc. All Rights Reserved. + +#include <zencore/endian.h> +#include <zencore/intmath.h> + +#include <zencore/testing.h> + +namespace zen { + +////////////////////////////////////////////////////////////////////////// +// +// Testing related code follows... +// + +#if ZEN_WITH_TESTS + +void +intmath_forcelink() +{ +} + +TEST_CASE("intmath") +{ + CHECK(FloorLog2(0x00) == 0); + CHECK(FloorLog2(0x01) == 0); + CHECK(FloorLog2(0x0f) == 3); + CHECK(FloorLog2(0x10) == 4); + CHECK(FloorLog2(0x11) == 4); + CHECK(FloorLog2(0x12) == 4); + CHECK(FloorLog2(0x22) == 5); + CHECK(FloorLog2(0x0001'0000) == 16); + CHECK(FloorLog2(0x0001'000f) == 16); + CHECK(FloorLog2(0x8000'0000) == 31); + + CHECK(FloorLog2_64(0x00ull) == 0); + CHECK(FloorLog2_64(0x01ull) == 0); + CHECK(FloorLog2_64(0x0full) == 3); + CHECK(FloorLog2_64(0x10ull) == 4); + CHECK(FloorLog2_64(0x11ull) == 4); + CHECK(FloorLog2_64(0x0001'0000ull) == 16); + CHECK(FloorLog2_64(0x0001'000full) == 16); + CHECK(FloorLog2_64(0x8000'0000ull) == 31); + CHECK(FloorLog2_64(0x0000'0001'0000'0000ull) == 32); + CHECK(FloorLog2_64(0x8000'0000'0000'0000ull) == 63); + + CHECK(CountLeadingZeros64(0x8000'0000'0000'0000ull) == 0); + CHECK(CountLeadingZeros64(0x0000'0000'0000'0000ull) == 64); + CHECK(CountLeadingZeros64(0x0000'0000'0000'0001ull) == 63); + CHECK(CountLeadingZeros64(0x0000'0000'8000'0000ull) == 32); + CHECK(CountLeadingZeros64(0x0000'0001'0000'0000ull) == 31); + + CHECK(CountTrailingZeros64(0x8000'0000'0000'0000ull) == 63); + CHECK(CountTrailingZeros64(0x0000'0000'0000'0000ull) == 64); + CHECK(CountTrailingZeros64(0x0000'0000'0000'0001ull) == 0); + CHECK(CountTrailingZeros64(0x0000'0000'8000'0000ull) == 31); + CHECK(CountTrailingZeros64(0x0000'0001'0000'0000ull) == 32); + + CHECK(ByteSwap(uint16_t(0x6d72)) == 0x726d); + CHECK(ByteSwap(uint32_t(0x2741'3965)) == 0x6539'4127); + CHECK(ByteSwap(uint64_t(0x214d'6172'7469'6e21ull)) == 0x216e'6974'7261'4d21ull); +} + +#endif + +} // namespace zen |