// license:BSD-3-Clause // copyright-holders:Vas Crabb /*************************************************************************** eigccppc.h Inline implementations for GCC compilers. This code is automatically included if appropriate by eminline.h. ***************************************************************************/ #ifndef MAME_OSD_EIGCC_H #define MAME_OSD_EIGCC_H #include /*************************************************************************** INLINE MATH FUNCTIONS ***************************************************************************/ /*------------------------------------------------- addu_32x32_co - perform an unsigned 32 bit + 32 bit addition and return the result with carry out -------------------------------------------------*/ #ifndef addu_32x32_co #define addu_32x32_co _addu_32x32_co inline bool _addu_32x32_co(uint32_t a, uint32_t b, uint32_t &sum) { return __builtin_add_overflow(a, b, &sum); } #endif /*------------------------------------------------- addu_64x64_co - perform an unsigned 64 bit + 64 bit addition and return the result with carry out -------------------------------------------------*/ #ifndef addu_64x64_co #define addu_64x64_co _addu_64x64_co inline bool _addu_64x64_co(uint64_t a, uint64_t b, uint64_t &sum) { return __builtin_add_overflow(a, b, &sum); } #endif /*************************************************************************** INLINE BIT MANIPULATION FUNCTIONS ***************************************************************************/ /*------------------------------------------------- count_leading_zeros_32 - return the number of leading zero bits in a 32-bit value -------------------------------------------------*/ #ifndef count_leading_zeros_32 #define count_leading_zeros_32 _count_leading_zeros_32 inline uint8_t _count_leading_zeros_32(uint32_t val) { // uses CPU feature if available, otherwise falls back to runtime library call static_assert(sizeof(val) == sizeof(unsigned), "expected 32-bit unsigned int"); return uint8_t(unsigned(val ? __builtin_clz(val) : 32)); } #endif /*------------------------------------------------- count_leading_ones_32 - return the number of leading one bits in a 32-bit value -------------------------------------------------*/ #ifndef count_leading_ones_32 #define count_leading_ones_32 _count_leading_ones_32 inline uint8_t _count_leading_ones_32(uint32_t val) { return count_leading_zeros_32(~val); } #endif /*------------------------------------------------- count_leading_zeros_64 - return the number of leading zero bits in a 64-bit value -------------------------------------------------*/ #ifndef count_leading_zeros_64 #define count_leading_zeros_64 _count_leading_zeros_64 inline uint8_t _count_leading_zeros_64(uint64_t val) { // uses CPU feature if available, otherwise falls back to runtime library call static_assert(sizeof(val) == sizeof(unsigned long long), "expected 64-bit unsigned long long int"); return uint8_t(unsigned(val ? __builtin_clzll(val) : 64)); } #endif /*------------------------------------------------- count_leading_ones_64 - return the number of leading one bits in a 64-bit value -------------------------------------------------*/ #ifndef count_leading_ones_64 #define count_leading_ones_64 _count_leading_ones_64 inline uint8_t _count_leading_ones_64(uint64_t val) { return count_leading_zeros_64(~val); } #endif /*------------------------------------------------- population_count_32 - return the number of one bits in a 32-bit value -------------------------------------------------*/ #ifndef population_count_32 #define population_count_32 _population_count_32 inline unsigned _population_count_32(uint32_t val) { // uses CPU feature if available, otherwise falls back to implementation similar to eminline.h static_assert(sizeof(val) == sizeof(unsigned), "expected 32-bit unsigned int"); return unsigned(__builtin_popcount(static_cast(val))); } #endif /*------------------------------------------------- population_count_64 - return the number of one bits in a 64-bit value -------------------------------------------------*/ #ifndef population_count_64 #define population_count_64 _population_count_64 inline unsigned _population_count_64(uint64_t val) { // uses CPU feature if available, otherwise falls back to implementation similar to eminline.h static_assert(sizeof(val) == sizeof(unsigned long long), "expected 64-bit unsigned long long int"); return unsigned(__builtin_popcountll(static_cast(val))); } #endif #endif // MAME_OSD_EIGCC_H