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Merge pull request #417 from lioncash/swap

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common: Move byte swapping functions to bit_utils.h
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Merry 2018-11-24 12:44:41 +00:00 • committed by MerryMage
commit ad14a33672
2 changed files with 30 additions and 12 deletions
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23
src/common/bit_util.h
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@ -12,6 +12,7 @@
#include <type_traits>
#include "common/assert.h"
#include "common/common_types.h"
namespace Dynarmic::Common {
@ -199,4 +200,26 @@ inline T RotateRight(T value, size_t amount) {
return static_cast<T>((x >> amount) | (x << (BitSize<T>() - amount)));
}
constexpr u16 Swap16(u16 value) {
return static_cast<u16>(u32{value} >> 8 | u32{value} << 8);
}
constexpr u32 Swap32(u32 value) {
return ((value & 0xFF000000U) >> 24) |
((value & 0x00FF0000U) >> 8) |
((value & 0x0000FF00U) << 8) |
((value & 0x000000FFU) << 24);
}
constexpr u64 Swap64(u64 value) {
return ((value & 0xFF00000000000000ULL) >> 56) |
((value & 0x00FF000000000000ULL) >> 40) |
((value & 0x0000FF0000000000ULL) >> 24) |
((value & 0x000000FF00000000ULL) >> 8) |
((value & 0x00000000FF000000ULL) << 8) |
((value & 0x0000000000FF0000ULL) << 24) |
((value & 0x000000000000FF00ULL) << 40) |
((value & 0x00000000000000FFULL) << 56);
}
} // namespace Dynarmic::Common