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- /* Copyright (C) 2010-2018 The RetroArch team
- *
- * ---------------------------------------------------------------------------------------
- * The following license statement only applies to this file (retro_endianness.h).
- * ---------------------------------------------------------------------------------------
- *
- * Permission is hereby granted, free of charge,
- * to any person obtaining a copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
- * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
- #ifndef __LIBRETRO_SDK_ENDIANNESS_H
- #define __LIBRETRO_SDK_ENDIANNESS_H
- #include <retro_inline.h>
- #include <stdint.h>
- #include <stdlib.h>
- #if defined(_MSC_VER) && _MSC_VER > 1200
- #define SWAP16 _byteswap_ushort
- #define SWAP32 _byteswap_ulong
- #else
- #define SWAP16(x) ((uint16_t)( \
- (((uint16_t)(x) & 0x00ff) << 8) | \
- (((uint16_t)(x) & 0xff00) >> 8) \
- ))
- #define SWAP32(x) ((uint32_t)( \
- (((uint32_t)(x) & 0x000000ff) << 24) | \
- (((uint32_t)(x) & 0x0000ff00) << 8) | \
- (((uint32_t)(x) & 0x00ff0000) >> 8) | \
- (((uint32_t)(x) & 0xff000000) >> 24) \
- ))
- #endif
- #if defined(_MSC_VER) && _MSC_VER <= 1200
- #define SWAP64(val) \
- ((((uint64_t)(val) & 0x00000000000000ff) << 56) \
- | (((uint64_t)(val) & 0x000000000000ff00) << 40) \
- | (((uint64_t)(val) & 0x0000000000ff0000) << 24) \
- | (((uint64_t)(val) & 0x00000000ff000000) << 8) \
- | (((uint64_t)(val) & 0x000000ff00000000) >> 8) \
- | (((uint64_t)(val) & 0x0000ff0000000000) >> 24) \
- | (((uint64_t)(val) & 0x00ff000000000000) >> 40) \
- | (((uint64_t)(val) & 0xff00000000000000) >> 56))
- #else
- #define SWAP64(val) \
- ((((uint64_t)(val) & 0x00000000000000ffULL) << 56) \
- | (((uint64_t)(val) & 0x000000000000ff00ULL) << 40) \
- | (((uint64_t)(val) & 0x0000000000ff0000ULL) << 24) \
- | (((uint64_t)(val) & 0x00000000ff000000ULL) << 8) \
- | (((uint64_t)(val) & 0x000000ff00000000ULL) >> 8) \
- | (((uint64_t)(val) & 0x0000ff0000000000ULL) >> 24) \
- | (((uint64_t)(val) & 0x00ff000000000000ULL) >> 40) \
- | (((uint64_t)(val) & 0xff00000000000000ULL) >> 56))
- #endif
- /**
- * is_little_endian:
- *
- * Checks if the system is little endian or big-endian.
- *
- * Returns: greater than 0 if little-endian,
- * otherwise big-endian.
- **/
- #if defined(MSB_FIRST)
- #define is_little_endian() (0)
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define is_little_endian() (1)
- #else
- static INLINE uint8_t is_little_endian(void)
- {
- union
- {
- uint16_t x;
- uint8_t y[2];
- } u;
- u.x = 1;
- return u.y[0];
- }
- #endif
- /**
- * swap_if_big64:
- * @val : unsigned 64-bit value
- *
- * Byteswap unsigned 64-bit value if system is big-endian.
- *
- * Returns: Byteswapped value in case system is big-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_big64(val) (SWAP64(val))
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_big64(val) (val)
- #else
- static INLINE uint64_t swap_if_big64(uint64_t val)
- {
- if (is_little_endian())
- return val;
- return SWAP64(val);
- }
- #endif
- /**
- * swap_if_big32:
- * @val : unsigned 32-bit value
- *
- * Byteswap unsigned 32-bit value if system is big-endian.
- *
- * Returns: Byteswapped value in case system is big-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_big32(val) (SWAP32(val))
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_big32(val) (val)
- #else
- static INLINE uint32_t swap_if_big32(uint32_t val)
- {
- if (is_little_endian())
- return val;
- return SWAP32(val);
- }
- #endif
- /**
- * swap_if_little64:
- * @val : unsigned 64-bit value
- *
- * Byteswap unsigned 64-bit value if system is little-endian.
- *
- * Returns: Byteswapped value in case system is little-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_little64(val) (val)
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_little64(val) (SWAP64(val))
- #else
- static INLINE uint64_t swap_if_little64(uint64_t val)
- {
- if (is_little_endian())
- return SWAP64(val);
- return val;
- }
- #endif
- /**
- * swap_if_little32:
- * @val : unsigned 32-bit value
- *
- * Byteswap unsigned 32-bit value if system is little-endian.
- *
- * Returns: Byteswapped value in case system is little-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_little32(val) (val)
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_little32(val) (SWAP32(val))
- #else
- static INLINE uint32_t swap_if_little32(uint32_t val)
- {
- if (is_little_endian())
- return SWAP32(val);
- return val;
- }
- #endif
- /**
- * swap_if_big16:
- * @val : unsigned 16-bit value
- *
- * Byteswap unsigned 16-bit value if system is big-endian.
- *
- * Returns: Byteswapped value in case system is big-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_big16(val) (SWAP16(val))
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_big16(val) (val)
- #else
- static INLINE uint16_t swap_if_big16(uint16_t val)
- {
- if (is_little_endian())
- return val;
- return SWAP16(val);
- }
- #endif
- /**
- * swap_if_little16:
- * @val : unsigned 16-bit value
- *
- * Byteswap unsigned 16-bit value if system is little-endian.
- *
- * Returns: Byteswapped value in case system is little-endian,
- * otherwise returns same value.
- **/
- #if defined(MSB_FIRST)
- #define swap_if_little16(val) (val)
- #elif defined(__x86_64) || defined(__i386) || defined(_M_IX86) || defined(_M_X64)
- #define swap_if_little16(val) (SWAP16(val))
- #else
- static INLINE uint16_t swap_if_little16(uint16_t val)
- {
- if (is_little_endian())
- return SWAP16(val);
- return val;
- }
- #endif
- /**
- * store32be:
- * @addr : pointer to unsigned 32-bit buffer
- * @data : unsigned 32-bit value to write
- *
- * Write data to address. Endian-safe. Byteswaps the data
- * first if necessary before storing it.
- **/
- static INLINE void store32be(uint32_t *addr, uint32_t data)
- {
- *addr = swap_if_little32(data);
- }
- /**
- * load32be:
- * @addr : pointer to unsigned 32-bit buffer
- *
- * Load value from address. Endian-safe.
- *
- * Returns: value from address, byte-swapped if necessary.
- **/
- static INLINE uint32_t load32be(const uint32_t *addr)
- {
- return swap_if_little32(*addr);
- }
- #endif
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