mirror of
https://github.com/JayDDee/cpuminer-opt.git
synced 2025-09-17 23:44:27 +00:00
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
#if !defined(SIMD_INT_H__)
|
|
#define SIMD_INT_H__ 1
|
|
|
|
// Endian byte swap
|
|
#define bswap_64( a ) __builtin_bswap64( a )
|
|
#define bswap_32( a ) __builtin_bswap32( a )
|
|
|
|
|
|
///////////////////////////////////////
|
|
//
|
|
// 128 bit integers
|
|
//
|
|
// 128 bit integers are inneficient and not a shortcut for __m128i.
|
|
// Native type __int128 supported starting with GCC-4.8.
|
|
//
|
|
// __int128 uses two 64 bit GPRs to hold the data. The main benefits are
|
|
// for 128 bit arithmetic. Vectors are preferred when 128 bit arith
|
|
// is not required. int128 also works better with other integer sizes.
|
|
// Vectors benefit from wider registers.
|
|
//
|
|
// For safety use typecasting on all numeric arguments.
|
|
//
|
|
// Use typecasting for conversion to/from 128 bit vector:
|
|
// __m128i v128 = (__m128i)my_int128l
|
|
// __m256i v256 = _mm256_set_m128i( (__m128i)my_int128, (__m128i)my_int128 );
|
|
// my_int128 = (uint128_t)_mm256_extracti128_si256( v256, 1 );
|
|
|
|
// Compiler check for __int128 support
|
|
// Configure also has a test for int128.
|
|
#if ( __GNUC__ > 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ >= 8 ) )
|
|
#define GCC_INT128 1
|
|
#endif
|
|
|
|
#if !defined(GCC_INT128)
|
|
#warning "__int128 not supported, requires GCC-4.8 or newer."
|
|
#endif
|
|
|
|
#if defined(GCC_INT128)
|
|
|
|
// Familiar looking type names
|
|
typedef __int128 int128_t;
|
|
typedef unsigned __int128 uint128_t;
|
|
|
|
// Extracting the low bits is a trivial cast.
|
|
// These specialized functions are optimized while providing a
|
|
// consistent interface.
|
|
#define u128_hi64( x ) ( (uint64_t)( (uint128_t)(x) >> 64 ) )
|
|
#define u128_lo64( x ) ( (uint64_t)(x) )
|
|
|
|
#endif // GCC_INT128
|
|
|
|
#endif // SIMD_INT_H__
|
|
|
|
|