// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** osdcomm.h Common definitions shared by the OSD layer. This includes the most fundamental integral types as well as compiler-specific tweaks. ***************************************************************************/ #pragma once #ifndef MAME_OSD_OSDCOMM_H #define MAME_OSD_OSDCOMM_H #include #include #include #include /*************************************************************************** COMPILER-SPECIFIC NASTINESS ***************************************************************************/ /* The Win32 port requires this constant for variable arg routines. */ #ifndef CLIB_DECL #define CLIB_DECL #endif /* Some optimizations/warnings cleanups for GCC */ #if defined(__GNUC__) #define ATTR_UNUSED __attribute__((__unused__)) #define ATTR_PRINTF(x,y) __attribute__((format(printf, x, y))) #define ATTR_CONST __attribute__((const)) #define ATTR_FORCE_INLINE __attribute__((always_inline)) #define ATTR_HOT __attribute__((hot)) #define ATTR_COLD __attribute__((cold)) #define UNEXPECTED(exp) __builtin_expect(!!(exp), 0) #define EXPECTED(exp) __builtin_expect(!!(exp), 1) #define RESTRICT __restrict__ #else #define ATTR_UNUSED #define ATTR_PRINTF(x,y) #define ATTR_CONST #define ATTR_FORCE_INLINE __forceinline #define ATTR_HOT #define ATTR_COLD #define UNEXPECTED(exp) (exp) #define EXPECTED(exp) (exp) #define RESTRICT #endif /*************************************************************************** FUNDAMENTAL TYPES ***************************************************************************/ namespace osd { using u8 = std::uint8_t; using u16 = std::uint16_t; using u32 = std::uint32_t; using u64 = std::uint64_t; using s8 = std::int8_t; using s16 = std::int16_t; using s32 = std::int32_t; using s64 = std::int64_t; } // namespace OSD /*************************************************************************** FUNDAMENTAL MACROS ***************************************************************************/ /* Concatenate/extract 32-bit halves of 64-bit values */ constexpr uint64_t concat_64(uint32_t hi, uint32_t lo) { return (uint64_t(hi) << 32) | uint32_t(lo); } constexpr uint32_t extract_64hi(uint64_t val) { return uint32_t(val >> 32); } constexpr uint32_t extract_64lo(uint64_t val) { return uint32_t(val); } // Highly useful template for compile-time knowledge of an array size template constexpr size_t ARRAY_LENGTH(T (&)[N]) { return N;} // For declaring an array of the same dimensions as another array (including multi-dimensional arrays) template struct equivalent_array_or_type { typedef T type; }; template struct equivalent_array_or_type { typedef typename equivalent_array_or_type::type type[N]; }; template using equivalent_array_or_type_t = typename equivalent_array_or_type::type; template struct equivalent_array { }; template struct equivalent_array { typedef equivalent_array_or_type_t type[N]; }; template using equivalent_array_t = typename equivalent_array::type; #define EQUIVALENT_ARRAY(a, T) equivalent_array_t > /* Macros for normalizing data into big or little endian formats */ constexpr uint16_t swapendian_int16(uint16_t val) { return (val << 8) | (val >> 8); } constexpr uint32_t swapendian_int32_partial16(uint32_t val) { return ((val << 8) & 0xFF00FF00U) | ((val >> 8) & 0x00FF00FFU); } constexpr uint32_t swapendian_int32(uint32_t val) { return (swapendian_int32_partial16(val) << 16) | (swapendian_int32_partial16(val) >> 16); } constexpr uint64_t swapendian_int64_partial16(uint64_t val) { return ((val << 8) & 0xFF00FF00FF00FF00U) | ((val >> 8) & 0x00FF00FF00FF00FFU); } constexpr uint64_t swapendian_int64_partial32(uint64_t val) { return ((swapendian_int64_partial16(val) << 16) & 0xFFFF0000FFFF0000U) | ((swapendian_int64_partial16(val) >> 16) & 0x0000FFFF0000FFFFU); } constexpr uint64_t swapendian_int64(uint64_t val) { return (swapendian_int64_partial32(val) << 32) | (swapendian_int64_partial32(val) >> 32); } #ifdef LSB_FIRST constexpr uint16_t big_endianize_int16(uint16_t x) { return swapendian_int16(x); } constexpr uint32_t big_endianize_int32(uint32_t x) { return swapendian_int32(x); } constexpr uint64_t big_endianize_int64(uint64_t x) { return swapendian_int64(x); } constexpr uint16_t little_endianize_int16(uint16_t x) { return x; } constexpr uint32_t little_endianize_int32(uint32_t x) { return x; } constexpr uint64_t little_endianize_int64(uint64_t x) { return x; } #else constexpr uint16_t big_endianize_int16(uint16_t x) { return x; } constexpr uint32_t big_endianize_int32(uint32_t x) { return x; } constexpr uint64_t big_endianize_int64(uint64_t x) { return x; } constexpr uint16_t little_endianize_int16(uint16_t x) { return swapendian_int16(x); } constexpr uint32_t little_endianize_int32(uint32_t x) { return swapendian_int32(x); } constexpr uint64_t little_endianize_int64(uint64_t x) { return swapendian_int64(x); } #endif /* LSB_FIRST */ #ifdef _MSC_VER using ssize_t = std::make_signed_t; #endif #ifdef __GNUC__ #ifndef alloca #define alloca(size) __builtin_alloca(size) #endif #endif #endif /* MAME_OSD_OSDCOMM_H */