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https://github.com/JayDDee/cpuminer-opt.git
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133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
// Some tools to help using AVX and AVX2
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#include <inttypes.h>
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//#include <immintrin.h>
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// Use these overlays to access the same data in memory as different types
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//
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// Can they be used to access data in ymm/xmm regs?
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// Can they be used in expressions?
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// uint64 a;
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// area256 v;
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// _mm256_load_si256( v.v256, p );
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// a = v.v64[0];
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// a = v.64[0] + v.v64[1];
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typedef union
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{
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#if defined __AVX__
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__m256i v256;
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#endif
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__m128i v128[ 2];
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uint64_t v64 [ 4];
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uint32_t v32 [ 8];
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uint16_t v16 [16];
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uint8_t v8 [32];
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} area256;
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typedef union
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{
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__m128i v128;
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uint64_t v64[ 2];
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uint32_t v32[ 4];
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uint16_t v16[ 8];
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uint8_t v8 [16];
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} area128;
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// useful instrinsics to move data between regs
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// move 128 from ymm to xmm
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// dst = a[127:0] ; imm8 == 0
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// dst = a[255:0] ; imm8 == 1
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//__m128i _mm256_extracti128_si256(__m256i a, int imm8)
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//move 128 from xmm to ymm
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// dst = a( a[255:128], b ) ; mask == 0
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// dst = a( b, a[127:0] ) ; mask == 1
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//__m256i _mm256_inserti128_si256(__m256i a, __m128i b, const int mask);
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#if defined __AVX2__
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// Rotate bits in 4 uint64
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// __m256i mm256_rotr_64( __256i, int )
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#define mm256_rotr_64(w,c) _mm256_or_si256(_mm256_srli_epi64(w, c), \
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_mm256_slli_epi64(w, 64 - c))
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//static inline __m256i mm256_rotr_64 ( __m256i w, int c)
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//{
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// return _mm256_or_si256( _mm256_srli_epi64( w, c ),
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// _mm256_slli_epi64( w, 64 - c ) );
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//}
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// Rotate uint64 by one uint64
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//__m256i mm256_rotl256_1x64( _mm256i, int )
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#define mm256_rotl256_1x64(s) _mm256_permute4x64_epi64( s, 0x39 )
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#define mm256_rotr256_1x64(s) _mm256_permute4x64_epi64( s, 0x93 )
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//static inline __m256i mm256_rotl256_1x64( __m256i s )
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//{
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// return _mm256_permute4x64_epi64( s, 0x39 );
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//}
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//static inline __m256i mm256_rotr256_1x64( __m256i s )
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//{
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// return _mm256_permute4x64_epi64( s, 0x93 );
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//}
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// swap hi and lo 128 bits in 256 bit vector
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// __m256i mm256_swap128( __m256i )
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#define mm256_swap128(s) _mm256_permute2f128_si256( s, s, 1 )
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//static inline __m256i mm256_swap128( __m256i s )
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//{
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// return _mm256_permute2f128_si256( s, s, 1 );
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//}
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#endif
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// rotate bits in 2 uint64
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// _m128i mm_rotr_64( __m128i, int )
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#define mm_rotr_64(w,c) _mm_or_si128(_mm_srli_epi64(w, c), \
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_mm_slli_epi64(w, 64 - c))
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//static inline __m128i mm_rotr_64( __m128i w, int c )
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//{
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// _mm_or_si128( _mm_srli_epi64( w, c ),
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// _mm_slli_epi64( w, 64 - c ) );
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//}
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// swap 128 bit source vectors
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// void mm128_swap128( __m128i, __m128i )
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// macro is better to update two args
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#define mm128_swap128(s0, s1) s0 = _mm_xor_si128(s0, s1); \
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s1 = _mm_xor_si128(s0, s1); \
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s0 = _mm_xor_si128(s0, s1);
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// swap upper and lower 64 bits of 128 bit source vector
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// __m128i mm128_swap64( __m128 )
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#define mm128_swap64(s) _mm_or_si128( _mm_slli_si128( s, 8 ), \
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_mm_srli_si128( s, 8 ) )
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// rotate 2 128 bit vectors as one 256 vector by 1 uint64, use as equivalent of
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// mm256_rotl256_1x64 when avx2 is not available or data is alreeady in __m128i
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// format. uses one local
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//void mm128_rotl256_1x64( __m128i, __m128i )
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#define mm128_rotl256_1x64(s0, s1) do { \
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__m128i t; \
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s0 = mm128_swap64( s0); \
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s1 = mm128_swap64( s1); \
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t = _mm_or_si128( _mm_and_si128( s0, _mm_set_epi64x(0ull,0xffffffffffffffffull) ), \
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_mm_and_si128( s1, _mm_set_epi64x(0xffffffffffffffffull,0ull) ) ); \
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s1 = _mm_or_si128( _mm_and_si128( s0, _mm_set_epi64x(0xffffffffffffffffull,0ull) ), \
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_mm_and_si128( s1, _mm_set_epi64x(0ull,0xffffffffffffffffull) ) ); \
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s0 = t; \
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} while(0)
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#define mm128_rotr256_1x64(s0, s1) do { \
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__m128i t; \
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s0 = mm128_swap64( s0); \
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s1 = mm128_swap64( s1); \
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t = _mm_or_si128( _mm_and_si128( s0, _mm_set_epi64x(0xffffffffffffffffull,0ull) ), \
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_mm_and_si128( s1, _mm_set_epi64x(0ull,0xffffffffffffffffull) ) ); \
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s1 = _mm_or_si128( _mm_and_si128( s0, _mm_set_epi64x(0ull,0xffffffffffffffffull) ), \
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_mm_and_si128( s1, _mm_set_epi64x(0xffffffffffffffffull,0ull) ) ); \
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s0 = t; \
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} while(0)
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