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Add support for the Xbox360 platform (PPC+msvc) 

This includes generic big endian support for msvc by mapping the
Microsoft byte swap instrinsics _bytes_swap_* to the gcc counterpart
names.
This commit is contained in:
Matthew Endsley 2014-07-11 23:41:47 +00:00 committed by Wouter van Oortmerssen
parent df2e0db63d
commit b632f8129f
1 changed files with 19 additions and 2 deletions
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21
include/flatbuffers/flatbuffers.h
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@ -44,13 +44,17 @@
#define FLATBUFFERS_LITTLEENDIAN 1
#endif // __BIG_ENDIAN__
#elif defined(_MSC_VER)
#define FLATBUFFERS_LITTLEENDIAN 1
#if defined(_M_PPC)
#define FLATBUFFERS_LITTLEENDIAN 0
#else
#define FLATBUFFERS_LITTLEENDIAN 1
#endif
#else
#error Unable to determine endianness, define FLATBUFFERS_LITTLEENDIAN.
#endif
#endif // !defined(FLATBUFFERS_LITTLEENDIAN)
#ifndef WIN32
#if !defined(_MSC_VER)
#define FLATBUFFERS_WEAK __attribute__((weak))
#else
#define FLATBUFFERS_WEAK __declspec(selectany)
@ -97,6 +101,14 @@ template<typename T> T EndianScalar(T t) {
#if FLATBUFFERS_LITTLEENDIAN
return t;
#else
#if defined(_MSC_VER)
#pragma push_macro("__builtin_bswap16")
#pragma push_macro("__builtin_bswap32")
#pragma push_macro("__builtin_bswap64")
#define __builtin_bswap16 _byteswap_ushort
#define __builtin_bswap32 _byteswap_ulong
#define __builtin_bswap64 _byteswap_uint64
#endif
// If you're on the few remaining big endian platforms, we make the bold
// assumption you're also on gcc/clang, and thus have bswap intrinsics:
if (sizeof(T) == 1) { // Compile-time if-then's.
@ -113,6 +125,11 @@ template<typename T> T EndianScalar(T t) {
} else {
assert(0);
}
#if defined(_MSC_VER)
#pragma pop_macro("__builtin_bswap16")
#pragma pop_macro("__builtin_bswap32")
#pragma pop_macro("__builtin_bswap64")
#endif
#endif
}