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v3.9.9

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Jay D Dee
2019-10-10 19:58:34 -04:00
parent 789c8b70bc
commit 72330eb5a7
30 changed files with 4534 additions and 858 deletions
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43
simd-utils/simd-int.h
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@@ -1,5 +1,5 @@
#if !defined(SIMD_SCALAR_H__)
#define SIMD_SCALAR_H__ 1
#if !defined(SIMD_INT_H__)
#define SIMD_INT_H__ 1
///////////////////////////////////
//
@@ -13,6 +13,8 @@
// Some utilities are also provided for smaller integers, most notably
// bit rotation.
// MMX has no extract instruction for 32 bit elements so this:
// Lo is trivial, high is a simple shift.
// Input may be uint64_t or __m64, returns uint32_t.
@@ -56,18 +58,45 @@ static inline void memset_zero_64( uint64_t *src, int n )
static inline void memset_64( uint64_t *dst, const uint64_t a, int n )
{ for ( int i = 0; i < n; i++ ) dst[i] = a; }
#if defined (GCC_INT128)
///////////////////////////////////////
//
// 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 );
// No real need or use.
//#define u128_neg1 ((uint128_t)(-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
// usefull for making constants.
#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;
// Maybe usefull for making constants.
#define mk_uint128( hi, lo ) \
( ( (uint128_t)(hi) << 64 ) | ( (uint128_t)(lo) ) )
@@ -92,6 +121,6 @@ static inline void memset_64( uint64_t *dst, const uint64_t a, int n )
#endif // GCC_INT128
#endif // SIMD_SCALAR_H__
#endif // SIMD_INT_H__