X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=deps%2Flibretro-common%2Finclude%2Fretro_endianness.h;fp=deps%2Flibretro-common%2Finclude%2Fretro_endianness.h;h=46984638c8b02d9f66155254e42ed1a91ff4a461;hb=3719602cbe883fb394a71353e20a10a4a306e814;hp=0000000000000000000000000000000000000000;hpb=8659d7fd2cdb11f63724ead0997f47f4c694f8c2;p=pcsx_rearmed.git diff --git a/deps/libretro-common/include/retro_endianness.h b/deps/libretro-common/include/retro_endianness.h new file mode 100644 index 00000000..46984638 --- /dev/null +++ b/deps/libretro-common/include/retro_endianness.h @@ -0,0 +1,580 @@ +/* Copyright (C) 2010-2020 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 +#include +#include + +#if defined(_MSC_VER) && _MSC_VER > 1200 +#define SWAP16 _byteswap_ushort +#define SWAP32 _byteswap_ulong +#else +static INLINE uint16_t SWAP16(uint16_t x) +{ + return ((x & 0x00ff) << 8) | + ((x & 0xff00) >> 8); +} + +static INLINE uint32_t SWAP32(uint32_t x) +{ + return ((x & 0x000000ff) << 24) | + ((x & 0x0000ff00) << 8) | + ((x & 0x00ff0000) >> 8) | + ((x & 0xff000000) >> 24); +} + +#endif + +#if defined(_MSC_VER) && _MSC_VER <= 1200 +static INLINE uint64_t SWAP64(uint64_t val) +{ + return + ((val & 0x00000000000000ff) << 56) + | ((val & 0x000000000000ff00) << 40) + | ((val & 0x0000000000ff0000) << 24) + | ((val & 0x00000000ff000000) << 8) + | ((val & 0x000000ff00000000) >> 8) + | ((val & 0x0000ff0000000000) >> 24) + | ((val & 0x00ff000000000000) >> 40) + | ((val & 0xff00000000000000) >> 56); +} +#else +static INLINE uint64_t SWAP64(uint64_t val) +{ + return ((val & 0x00000000000000ffULL) << 56) + | ((val & 0x000000000000ff00ULL) << 40) + | ((val & 0x0000000000ff0000ULL) << 24) + | ((val & 0x00000000ff000000ULL) << 8) + | ((val & 0x000000ff00000000ULL) >> 8) + | ((val & 0x0000ff0000000000ULL) >> 24) + | ((val & 0x00ff000000000000ULL) >> 40) + | ((val & 0xff00000000000000ULL) >> 56); +} +#endif + +#ifdef _MSC_VER +/* MSVC pre-defines macros depending on target arch */ +#if defined (_M_IX86) || defined (_M_AMD64) || defined (_M_ARM) || defined (_M_ARM64) +#ifndef LSB_FIRST +#define LSB_FIRST 1 +#endif +#elif _M_PPC +#ifndef MSB_FIRST +#define MSB_FIRST 1 +#endif +#else +/* MSVC can run on _M_ALPHA and _M_IA64 too, but they're both bi-endian; need to find what mode MSVC runs them at */ +#error "unknown platform, can't determine endianness" +#endif +#else +#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +#ifndef MSB_FIRST +#define MSB_FIRST 1 +#endif +#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ +#ifndef LSB_FIRST +#define LSB_FIRST 1 +#endif +#else +#error "Invalid endianness macros" +#endif +#endif + +#if defined(MSB_FIRST) && defined(LSB_FIRST) +# error "Bug in LSB_FIRST/MSB_FIRST definition" +#endif + +#if !defined(MSB_FIRST) && !defined(LSB_FIRST) +# error "Bug in LSB_FIRST/MSB_FIRST definition" +#endif + +#ifdef MSB_FIRST +# define RETRO_IS_BIG_ENDIAN 1 +# define RETRO_IS_LITTLE_ENDIAN 0 +/* For compatibility */ +# define WORDS_BIGENDIAN 1 +#else +# define RETRO_IS_BIG_ENDIAN 0 +# define RETRO_IS_LITTLE_ENDIAN 1 +/* For compatibility */ +# undef WORDS_BIGENDIAN +#endif + + +/** + * is_little_endian: + * + * Checks if the system is little endian or big-endian. + * + * Returns: greater than 0 if little-endian, + * otherwise big-endian. + **/ +#define is_little_endian() RETRO_IS_LITTLE_ENDIAN + +/** + * 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 RETRO_IS_BIG_ENDIAN +#define swap_if_big64(val) (SWAP64(val)) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_big64(val) (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 RETRO_IS_BIG_ENDIAN +#define swap_if_big32(val) (SWAP32(val)) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_big32(val) (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 RETRO_IS_BIG_ENDIAN +#define swap_if_little64(val) (val) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_little64(val) (SWAP64(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 RETRO_IS_BIG_ENDIAN +#define swap_if_little32(val) (val) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_little32(val) (SWAP32(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 RETRO_IS_BIG_ENDIAN +#define swap_if_big16(val) (SWAP16(val)) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_big16(val) (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 RETRO_IS_BIG_ENDIAN +#define swap_if_little16(val) (val) +#elif RETRO_IS_LITTLE_ENDIAN +#define swap_if_little16(val) (SWAP16(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); +} + +/** + * retro_cpu_to_le16: + * @val : unsigned 16-bit value + * + * Convert unsigned 16-bit value from system to little-endian. + * + * Returns: Little-endian representation of val. + **/ + +#define retro_cpu_to_le16(val) swap_if_big16(val) + +/** + * retro_cpu_to_le32: + * @val : unsigned 32-bit value + * + * Convert unsigned 32-bit value from system to little-endian. + * + * Returns: Little-endian representation of val. + **/ + +#define retro_cpu_to_le32(val) swap_if_big32(val) + +/** + * retro_cpu_to_le64: + * @val : unsigned 64-bit value + * + * Convert unsigned 64-bit value from system to little-endian. + * + * Returns: Little-endian representation of val. + **/ + +#define retro_cpu_to_le64(val) swap_if_big64(val) + +/** + * retro_le_to_cpu16: + * @val : unsigned 16-bit value + * + * Convert unsigned 16-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +#define retro_le_to_cpu16(val) swap_if_big16(val) + +/** + * retro_le_to_cpu32: + * @val : unsigned 32-bit value + * + * Convert unsigned 32-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +#define retro_le_to_cpu32(val) swap_if_big32(val) + +/** + * retro_le_to_cpu16: + * @val : unsigned 64-bit value + * + * Convert unsigned 64-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +#define retro_le_to_cpu64(val) swap_if_big64(val) + +/** + * retro_cpu_to_be16: + * @val : unsigned 16-bit value + * + * Convert unsigned 16-bit value from system to big-endian. + * + * Returns: Big-endian representation of val. + **/ + +#define retro_cpu_to_be16(val) swap_if_little16(val) + +/** + * retro_cpu_to_be32: + * @val : unsigned 32-bit value + * + * Convert unsigned 32-bit value from system to big-endian. + * + * Returns: Big-endian representation of val. + **/ + +#define retro_cpu_to_be32(val) swap_if_little32(val) + +/** + * retro_cpu_to_be64: + * @val : unsigned 64-bit value + * + * Convert unsigned 64-bit value from system to big-endian. + * + * Returns: Big-endian representation of val. + **/ + +#define retro_cpu_to_be64(val) swap_if_little64(val) + +/** + * retro_be_to_cpu16: + * @val : unsigned 16-bit value + * + * Convert unsigned 16-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +#define retro_be_to_cpu16(val) swap_if_little16(val) + +/** + * retro_be_to_cpu32: + * @val : unsigned 32-bit value + * + * Convert unsigned 32-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +#define retro_be_to_cpu32(val) swap_if_little32(val) + +/** + * retro_be_to_cpu64: + * @val : unsigned 64-bit value + * + * Convert unsigned 64-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +#define retro_be_to_cpu64(val) swap_if_little64(val) + +#ifdef __GNUC__ +/* This attribute means that the same memory may be referred through + pointers to different size of the object (aliasing). E.g. that u8 * + and u32 * may actually be pointing to the same object. */ +#define MAY_ALIAS __attribute__((__may_alias__)) +#else +#define MAY_ALIAS +#endif + +#pragma pack(push, 1) +struct retro_unaligned_uint16_s +{ + uint16_t val; +} MAY_ALIAS; +struct retro_unaligned_uint32_s +{ + uint32_t val; +} MAY_ALIAS; +struct retro_unaligned_uint64_s +{ + uint64_t val; +} MAY_ALIAS; +#pragma pack(pop) + +typedef struct retro_unaligned_uint16_s retro_unaligned_uint16_t; +typedef struct retro_unaligned_uint32_s retro_unaligned_uint32_t; +typedef struct retro_unaligned_uint64_s retro_unaligned_uint64_t; + +/* L-value references to unaligned pointers. */ +#define retro_unaligned16(p) (((retro_unaligned_uint16_t *)p)->val) +#define retro_unaligned32(p) (((retro_unaligned_uint32_t *)p)->val) +#define retro_unaligned64(p) (((retro_unaligned_uint64_t *)p)->val) + +/** + * retro_get_unaligned_16be: + * @addr : pointer to unsigned 16-bit value + * + * Convert unsigned unaligned 16-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +static INLINE uint16_t retro_get_unaligned_16be(void *addr) { + return retro_be_to_cpu16(retro_unaligned16(addr)); +} + +/** + * retro_get_unaligned_32be: + * @addr : pointer to unsigned 32-bit value + * + * Convert unsigned unaligned 32-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +static INLINE uint32_t retro_get_unaligned_32be(void *addr) { + return retro_be_to_cpu32(retro_unaligned32(addr)); +} + +/** + * retro_get_unaligned_64be: + * @addr : pointer to unsigned 64-bit value + * + * Convert unsigned unaligned 64-bit value from big-endian to native. + * + * Returns: Native representation of big-endian val. + **/ + +static INLINE uint64_t retro_get_unaligned_64be(void *addr) { + return retro_be_to_cpu64(retro_unaligned64(addr)); +} + +/** + * retro_get_unaligned_16le: + * @addr : pointer to unsigned 16-bit value + * + * Convert unsigned unaligned 16-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +static INLINE uint16_t retro_get_unaligned_16le(void *addr) { + return retro_le_to_cpu16(retro_unaligned16(addr)); +} + +/** + * retro_get_unaligned_32le: + * @addr : pointer to unsigned 32-bit value + * + * Convert unsigned unaligned 32-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +static INLINE uint32_t retro_get_unaligned_32le(void *addr) { + return retro_le_to_cpu32(retro_unaligned32(addr)); +} + +/** + * retro_get_unaligned_64le: + * @addr : pointer to unsigned 64-bit value + * + * Convert unsigned unaligned 64-bit value from little-endian to native. + * + * Returns: Native representation of little-endian val. + **/ + +static INLINE uint64_t retro_get_unaligned_64le(void *addr) { + return retro_le_to_cpu64(retro_unaligned64(addr)); +} + +/** + * retro_set_unaligned_16le: + * @addr : pointer to unsigned 16-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 16-bit little-endian value + * + **/ + +static INLINE void retro_set_unaligned_16le(void *addr, uint16_t v) { + retro_unaligned16(addr) = retro_cpu_to_le16(v); +} + +/** + * retro_set_unaligned_32le: + * @addr : pointer to unsigned 32-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 32-bit little-endian value + * + **/ + +static INLINE void retro_set_unaligned_32le(void *addr, uint32_t v) { + retro_unaligned32(addr) = retro_cpu_to_le32(v); +} + +/** + * retro_set_unaligned_32le: + * @addr : pointer to unsigned 32-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 32-bit little-endian value + * + **/ + +static INLINE void retro_set_unaligned_64le(void *addr, uint64_t v) { + retro_unaligned64(addr) = retro_cpu_to_le64(v); +} + +/** + * retro_set_unaligned_16be: + * @addr : pointer to unsigned 16-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 16-bit big-endian value + * + **/ + +static INLINE void retro_set_unaligned_16be(void *addr, uint16_t v) { + retro_unaligned16(addr) = retro_cpu_to_be16(v); +} + +/** + * retro_set_unaligned_32be: + * @addr : pointer to unsigned 32-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 32-bit big-endian value + * + **/ + +static INLINE void retro_set_unaligned_32be(void *addr, uint32_t v) { + retro_unaligned32(addr) = retro_cpu_to_be32(v); +} + +/** + * retro_set_unaligned_32be: + * @addr : pointer to unsigned 32-bit value + * @val : value to store + * + * Convert native value to unsigned unaligned 32-bit big-endian value + * + **/ + +static INLINE void retro_set_unaligned_64be(void *addr, uint64_t v) { + retro_unaligned64(addr) = retro_cpu_to_be64(v); +} + + +#endif