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Add byteswapping macros for big-endian systems

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Cameron Gutman
2021-04-17 21:43:13 -05:00
parent efaeade7a6
commit 4304e597d8
8 changed files with 146 additions and 92 deletions
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35
src/Platform.h
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@@ -61,6 +61,41 @@
#define LC_ASSERT(x) assert(x)
#endif
#ifdef _MSC_VER
#pragma intrinsic(_byteswap_ushort)
#define BSWAP16(x) _byteswap_ushort(x)
#pragma intrinsic(_byteswap_ulong)
#define BSWAP32(x) _byteswap_ulong(x)
#pragma intrinsic(_byteswap_uint64)
#define BSWAP64(x) _byteswap_uint64(x)
#elif (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
#define BSWAP16(x) __builtin_bswap16(x)
#define BSWAP32(x) __builtin_bswap32(x)
#define BSWAP64(x) __builtin_bswap64(x)
#elif defined(__has_builtin) && __has_builtin(__builtin_bswap16)
#define BSWAP16(x) __builtin_bswap16(x)
#define BSWAP32(x) __builtin_bswap32(x)
#define BSWAP64(x) __builtin_bswap64(x)
#else
#error Please define your platform's byteswap macros!
#endif
#if (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || defined(__BIG_ENDIAN__)
#define LE16(x) BSWAP16(x)
#define LE32(x) BSWAP32(x)
#define LE64(x) BSWAP64(x)
#define BE16(x) (x)
#define BE32(x) (x)
#define BE64(x) (x)
#else
#define LE16(x) (x)
#define LE32(x) (x)
#define LE64(x) (x)
#define BE16(x) BSWAP16(x)
#define BE32(x) BSWAP32(x)
#define BE64(x) BSWAP64(x)
#endif
int initializePlatform(void);
void cleanupPlatform(void);