diff options
Diffstat (limited to 'include/llvm/Support/Endian.h')
| -rw-r--r-- | include/llvm/Support/Endian.h | 168 |
1 files changed, 91 insertions, 77 deletions
diff --git a/include/llvm/Support/Endian.h b/include/llvm/Support/Endian.h index 06e089ffa166f..f50d9b502dafb 100644 --- a/include/llvm/Support/Endian.h +++ b/include/llvm/Support/Endian.h @@ -14,27 +14,36 @@ #ifndef LLVM_SUPPORT_ENDIAN_H #define LLVM_SUPPORT_ENDIAN_H +#include "llvm/Support/AlignOf.h" +#include "llvm/Support/Compiler.h" #include "llvm/Support/Host.h" #include "llvm/Support/SwapByteOrder.h" - -#include <stdint.h> +#include <cassert> +#include <cstddef> +#include <cstdint> +#include <cstring> +#include <type_traits> namespace llvm { namespace support { + enum endianness {big, little, native}; // These are named values for common alignments. enum {aligned = 0, unaligned = 1}; namespace detail { - /// \brief ::value is either alignment, or alignof(T) if alignment is 0. - template<class T, int alignment> - struct PickAlignment { - enum { value = alignment == 0 ? alignof(T) : alignment }; - }; + +/// \brief ::value is either alignment, or alignof(T) if alignment is 0. +template<class T, int alignment> +struct PickAlignment { + enum { value = alignment == 0 ? alignof(T) : alignment }; +}; + } // end namespace detail namespace endian { + constexpr endianness system_endianness() { return sys::IsBigEndianHost ? big : little; } @@ -190,9 +199,11 @@ inline void writeAtBitAlignment(void *memory, value_type value, &val[0], sizeof(value_type) * 2); } } + } // end namespace endian namespace detail { + template<typename value_type, endianness endian, std::size_t alignment> @@ -254,77 +265,78 @@ public: } // end namespace detail -typedef detail::packed_endian_specific_integral - <uint16_t, little, unaligned> ulittle16_t; -typedef detail::packed_endian_specific_integral - <uint32_t, little, unaligned> ulittle32_t; -typedef detail::packed_endian_specific_integral - <uint64_t, little, unaligned> ulittle64_t; - -typedef detail::packed_endian_specific_integral - <int16_t, little, unaligned> little16_t; -typedef detail::packed_endian_specific_integral - <int32_t, little, unaligned> little32_t; -typedef detail::packed_endian_specific_integral - <int64_t, little, unaligned> little64_t; - -typedef detail::packed_endian_specific_integral - <uint16_t, little, aligned> aligned_ulittle16_t; -typedef detail::packed_endian_specific_integral - <uint32_t, little, aligned> aligned_ulittle32_t; -typedef detail::packed_endian_specific_integral - <uint64_t, little, aligned> aligned_ulittle64_t; - -typedef detail::packed_endian_specific_integral - <int16_t, little, aligned> aligned_little16_t; -typedef detail::packed_endian_specific_integral - <int32_t, little, aligned> aligned_little32_t; -typedef detail::packed_endian_specific_integral - <int64_t, little, aligned> aligned_little64_t; - -typedef detail::packed_endian_specific_integral - <uint16_t, big, unaligned> ubig16_t; -typedef detail::packed_endian_specific_integral - <uint32_t, big, unaligned> ubig32_t; -typedef detail::packed_endian_specific_integral - <uint64_t, big, unaligned> ubig64_t; - -typedef detail::packed_endian_specific_integral - <int16_t, big, unaligned> big16_t; -typedef detail::packed_endian_specific_integral - <int32_t, big, unaligned> big32_t; -typedef detail::packed_endian_specific_integral - <int64_t, big, unaligned> big64_t; - -typedef detail::packed_endian_specific_integral - <uint16_t, big, aligned> aligned_ubig16_t; -typedef detail::packed_endian_specific_integral - <uint32_t, big, aligned> aligned_ubig32_t; -typedef detail::packed_endian_specific_integral - <uint64_t, big, aligned> aligned_ubig64_t; - -typedef detail::packed_endian_specific_integral - <int16_t, big, aligned> aligned_big16_t; -typedef detail::packed_endian_specific_integral - <int32_t, big, aligned> aligned_big32_t; -typedef detail::packed_endian_specific_integral - <int64_t, big, aligned> aligned_big64_t; - -typedef detail::packed_endian_specific_integral - <uint16_t, native, unaligned> unaligned_uint16_t; -typedef detail::packed_endian_specific_integral - <uint32_t, native, unaligned> unaligned_uint32_t; -typedef detail::packed_endian_specific_integral - <uint64_t, native, unaligned> unaligned_uint64_t; - -typedef detail::packed_endian_specific_integral - <int16_t, native, unaligned> unaligned_int16_t; -typedef detail::packed_endian_specific_integral - <int32_t, native, unaligned> unaligned_int32_t; -typedef detail::packed_endian_specific_integral - <int64_t, native, unaligned> unaligned_int64_t; +using ulittle16_t = + detail::packed_endian_specific_integral<uint16_t, little, unaligned>; +using ulittle32_t = + detail::packed_endian_specific_integral<uint32_t, little, unaligned>; +using ulittle64_t = + detail::packed_endian_specific_integral<uint64_t, little, unaligned>; + +using little16_t = + detail::packed_endian_specific_integral<int16_t, little, unaligned>; +using little32_t = + detail::packed_endian_specific_integral<int32_t, little, unaligned>; +using little64_t = + detail::packed_endian_specific_integral<int64_t, little, unaligned>; + +using aligned_ulittle16_t = + detail::packed_endian_specific_integral<uint16_t, little, aligned>; +using aligned_ulittle32_t = + detail::packed_endian_specific_integral<uint32_t, little, aligned>; +using aligned_ulittle64_t = + detail::packed_endian_specific_integral<uint64_t, little, aligned>; + +using aligned_little16_t = + detail::packed_endian_specific_integral<int16_t, little, aligned>; +using aligned_little32_t = + detail::packed_endian_specific_integral<int32_t, little, aligned>; +using aligned_little64_t = + detail::packed_endian_specific_integral<int64_t, little, aligned>; + +using ubig16_t = + detail::packed_endian_specific_integral<uint16_t, big, unaligned>; +using ubig32_t = + detail::packed_endian_specific_integral<uint32_t, big, unaligned>; +using ubig64_t = + detail::packed_endian_specific_integral<uint64_t, big, unaligned>; + +using big16_t = + detail::packed_endian_specific_integral<int16_t, big, unaligned>; +using big32_t = + detail::packed_endian_specific_integral<int32_t, big, unaligned>; +using big64_t = + detail::packed_endian_specific_integral<int64_t, big, unaligned>; + +using aligned_ubig16_t = + detail::packed_endian_specific_integral<uint16_t, big, aligned>; +using aligned_ubig32_t = + detail::packed_endian_specific_integral<uint32_t, big, aligned>; +using aligned_ubig64_t = + detail::packed_endian_specific_integral<uint64_t, big, aligned>; + +using aligned_big16_t = + detail::packed_endian_specific_integral<int16_t, big, aligned>; +using aligned_big32_t = + detail::packed_endian_specific_integral<int32_t, big, aligned>; +using aligned_big64_t = + detail::packed_endian_specific_integral<int64_t, big, aligned>; + +using unaligned_uint16_t = + detail::packed_endian_specific_integral<uint16_t, native, unaligned>; +using unaligned_uint32_t = + detail::packed_endian_specific_integral<uint32_t, native, unaligned>; +using unaligned_uint64_t = + detail::packed_endian_specific_integral<uint64_t, native, unaligned>; + +using unaligned_int16_t = + detail::packed_endian_specific_integral<int16_t, native, unaligned>; +using unaligned_int32_t = + detail::packed_endian_specific_integral<int32_t, native, unaligned>; +using unaligned_int64_t = + detail::packed_endian_specific_integral<int64_t, native, unaligned>; namespace endian { + template <typename T> inline T read(const void *P, endianness E) { return read<T, unaligned>(P, E); } @@ -394,8 +406,10 @@ inline void write64le(void *P, uint64_t V) { write64<little>(P, V); } inline void write16be(void *P, uint16_t V) { write16<big>(P, V); } inline void write32be(void *P, uint32_t V) { write32<big>(P, V); } inline void write64be(void *P, uint64_t V) { write64<big>(P, V); } + } // end namespace endian + } // end namespace support } // end namespace llvm -#endif +#endif // LLVM_SUPPORT_ENDIAN_H |