mirror of
https://github.com/wolfpld/tracy.git
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601 lines
18 KiB
C++
601 lines
18 KiB
C++
#include "TracyEtc1.hpp"
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#include <array>
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#include <assert.h>
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#include <stdint.h>
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#include <string.h>
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#ifdef __SSE4_1__
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# ifdef _MSC_VER
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# include <intrin.h>
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# include <Windows.h>
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# define _bswap(x) _byteswap_ulong(x)
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# else
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# include <x86intrin.h>
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# endif
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#else
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# ifndef _MSC_VER
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# include <byteswap.h>
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# define _bswap(x) bswap_32(x)
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# endif
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#endif
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#ifndef _bswap
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# define _bswap(x) __builtin_bswap32(x)
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#endif
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namespace tracy
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{
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typedef std::array<uint16_t, 4> v4i;
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const uint32_t g_avg2[16] = {
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0x00,
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0x11,
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0x22,
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0x33,
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0x44,
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0x55,
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0x66,
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0x77,
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0x88,
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0x99,
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0xAA,
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0xBB,
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0xCC,
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0xDD,
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0xEE,
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0xFF
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};
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const int64_t g_table256[8][4] = {
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{ 2*256, 8*256, -2*256, -8*256 },
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{ 5*256, 17*256, -5*256, -17*256 },
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{ 9*256, 29*256, -9*256, -29*256 },
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{ 13*256, 42*256, -13*256, -42*256 },
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{ 18*256, 60*256, -18*256, -60*256 },
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{ 24*256, 80*256, -24*256, -80*256 },
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{ 33*256, 106*256, -33*256, -106*256 },
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{ 47*256, 183*256, -47*256, -183*256 }
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};
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const uint32_t g_id[4][16] = {
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{ 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 },
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{ 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2 },
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{ 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4 },
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{ 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6 }
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};
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#ifdef __SSE4_1__
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const __m128i g_table128_SIMD[2] =
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{
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_mm_setr_epi16( 2*128, 5*128, 9*128, 13*128, 18*128, 24*128, 33*128, 47*128),
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_mm_setr_epi16( 8*128, 17*128, 29*128, 42*128, 60*128, 80*128, 106*128, 183*128)
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};
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const __m128i g_table256_SIMD[4] =
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{
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_mm_setr_epi32( 2*256, 5*256, 9*256, 13*256),
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_mm_setr_epi32( 8*256, 17*256, 29*256, 42*256),
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_mm_setr_epi32( 18*256, 24*256, 33*256, 47*256),
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_mm_setr_epi32( 60*256, 80*256, 106*256, 183*256)
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};
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#endif
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template<class T>
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static inline T sq( T val )
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{
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return val * val;
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}
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static inline int mul8bit( int a, int b )
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{
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int t = a*b + 128;
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return ( t + ( t >> 8 ) ) >> 8;
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}
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template<class T>
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static size_t GetLeastError( const T* err, size_t num )
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{
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size_t idx = 0;
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for( size_t i=1; i<num; i++ )
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{
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if( err[i] < err[idx] )
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{
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idx = i;
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}
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}
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return idx;
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}
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static uint64_t FixByteOrder( uint64_t d )
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{
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return ( ( d & 0x00000000FFFFFFFF ) ) |
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( ( d & 0xFF00000000000000 ) >> 24 ) |
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( ( d & 0x000000FF00000000 ) << 24 ) |
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( ( d & 0x00FF000000000000 ) >> 8 ) |
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( ( d & 0x0000FF0000000000 ) << 8 );
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}
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template<class T, class S>
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static uint64_t EncodeSelectors( uint64_t d, const T terr[2][8], const S tsel[16][8], const uint32_t* id )
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{
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size_t tidx[2];
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tidx[0] = GetLeastError( terr[0], 8 );
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tidx[1] = GetLeastError( terr[1], 8 );
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d |= tidx[0] << 26;
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d |= tidx[1] << 29;
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for( int i=0; i<16; i++ )
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{
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uint64_t t = tsel[i][tidx[id[i]%2]];
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d |= ( t & 0x1 ) << ( i + 32 );
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d |= ( t & 0x2 ) << ( i + 47 );
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}
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return d;
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}
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static void Average( const uint8_t* data, v4i* a )
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{
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#ifdef __SSE4_1__
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__m128i d0 = _mm_loadu_si128(((__m128i*)data) + 0);
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__m128i d1 = _mm_loadu_si128(((__m128i*)data) + 1);
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__m128i d2 = _mm_loadu_si128(((__m128i*)data) + 2);
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__m128i d3 = _mm_loadu_si128(((__m128i*)data) + 3);
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__m128i d0l = _mm_unpacklo_epi8(d0, _mm_setzero_si128());
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__m128i d0h = _mm_unpackhi_epi8(d0, _mm_setzero_si128());
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__m128i d1l = _mm_unpacklo_epi8(d1, _mm_setzero_si128());
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__m128i d1h = _mm_unpackhi_epi8(d1, _mm_setzero_si128());
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__m128i d2l = _mm_unpacklo_epi8(d2, _mm_setzero_si128());
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__m128i d2h = _mm_unpackhi_epi8(d2, _mm_setzero_si128());
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__m128i d3l = _mm_unpacklo_epi8(d3, _mm_setzero_si128());
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__m128i d3h = _mm_unpackhi_epi8(d3, _mm_setzero_si128());
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__m128i sum0 = _mm_add_epi16(d0l, d1l);
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__m128i sum1 = _mm_add_epi16(d0h, d1h);
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__m128i sum2 = _mm_add_epi16(d2l, d3l);
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__m128i sum3 = _mm_add_epi16(d2h, d3h);
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__m128i sum0l = _mm_unpacklo_epi16(sum0, _mm_setzero_si128());
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__m128i sum0h = _mm_unpackhi_epi16(sum0, _mm_setzero_si128());
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__m128i sum1l = _mm_unpacklo_epi16(sum1, _mm_setzero_si128());
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__m128i sum1h = _mm_unpackhi_epi16(sum1, _mm_setzero_si128());
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__m128i sum2l = _mm_unpacklo_epi16(sum2, _mm_setzero_si128());
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__m128i sum2h = _mm_unpackhi_epi16(sum2, _mm_setzero_si128());
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__m128i sum3l = _mm_unpacklo_epi16(sum3, _mm_setzero_si128());
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__m128i sum3h = _mm_unpackhi_epi16(sum3, _mm_setzero_si128());
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__m128i b0 = _mm_add_epi32(sum0l, sum0h);
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__m128i b1 = _mm_add_epi32(sum1l, sum1h);
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__m128i b2 = _mm_add_epi32(sum2l, sum2h);
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__m128i b3 = _mm_add_epi32(sum3l, sum3h);
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__m128i a0 = _mm_srli_epi32(_mm_add_epi32(_mm_add_epi32(b2, b3), _mm_set1_epi32(4)), 3);
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__m128i a1 = _mm_srli_epi32(_mm_add_epi32(_mm_add_epi32(b0, b1), _mm_set1_epi32(4)), 3);
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__m128i a2 = _mm_srli_epi32(_mm_add_epi32(_mm_add_epi32(b1, b3), _mm_set1_epi32(4)), 3);
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__m128i a3 = _mm_srli_epi32(_mm_add_epi32(_mm_add_epi32(b0, b2), _mm_set1_epi32(4)), 3);
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_mm_storeu_si128((__m128i*)&a[0], _mm_packus_epi32(_mm_shuffle_epi32(a0, _MM_SHUFFLE(3, 0, 1, 2)), _mm_shuffle_epi32(a1, _MM_SHUFFLE(3, 0, 1, 2))));
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_mm_storeu_si128((__m128i*)&a[2], _mm_packus_epi32(_mm_shuffle_epi32(a2, _MM_SHUFFLE(3, 0, 1, 2)), _mm_shuffle_epi32(a3, _MM_SHUFFLE(3, 0, 1, 2))));
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#else
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uint32_t r[4];
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uint32_t g[4];
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uint32_t b[4];
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memset(r, 0, sizeof(r));
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memset(g, 0, sizeof(g));
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memset(b, 0, sizeof(b));
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for( int j=0; j<4; j++ )
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{
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for( int i=0; i<4; i++ )
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{
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int index = (j & 2) + (i >> 1);
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b[index] += *data++;
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g[index] += *data++;
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r[index] += *data++;
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data++;
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}
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}
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a[0] = v4i{ uint16_t( (r[2] + r[3] + 4) / 8 ), uint16_t( (g[2] + g[3] + 4) / 8 ), uint16_t( (b[2] + b[3] + 4) / 8 ), 0};
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a[1] = v4i{ uint16_t( (r[0] + r[1] + 4) / 8 ), uint16_t( (g[0] + g[1] + 4) / 8 ), uint16_t( (b[0] + b[1] + 4) / 8 ), 0};
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a[2] = v4i{ uint16_t( (r[1] + r[3] + 4) / 8 ), uint16_t( (g[1] + g[3] + 4) / 8 ), uint16_t( (b[1] + b[3] + 4) / 8 ), 0};
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a[3] = v4i{ uint16_t( (r[0] + r[2] + 4) / 8 ), uint16_t( (g[0] + g[2] + 4) / 8 ), uint16_t( (b[0] + b[2] + 4) / 8 ), 0};
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#endif
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}
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static void CalcErrorBlock( const uint8_t* data, unsigned int err[4][4] )
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{
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#ifdef __SSE4_1__
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__m128i d0 = _mm_loadu_si128(((__m128i*)data) + 0);
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__m128i d1 = _mm_loadu_si128(((__m128i*)data) + 1);
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__m128i d2 = _mm_loadu_si128(((__m128i*)data) + 2);
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__m128i d3 = _mm_loadu_si128(((__m128i*)data) + 3);
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__m128i dm0 = _mm_and_si128(d0, _mm_set1_epi32(0x00FFFFFF));
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__m128i dm1 = _mm_and_si128(d1, _mm_set1_epi32(0x00FFFFFF));
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__m128i dm2 = _mm_and_si128(d2, _mm_set1_epi32(0x00FFFFFF));
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__m128i dm3 = _mm_and_si128(d3, _mm_set1_epi32(0x00FFFFFF));
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__m128i d0l = _mm_unpacklo_epi8(dm0, _mm_setzero_si128());
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__m128i d0h = _mm_unpackhi_epi8(dm0, _mm_setzero_si128());
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__m128i d1l = _mm_unpacklo_epi8(dm1, _mm_setzero_si128());
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__m128i d1h = _mm_unpackhi_epi8(dm1, _mm_setzero_si128());
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__m128i d2l = _mm_unpacklo_epi8(dm2, _mm_setzero_si128());
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__m128i d2h = _mm_unpackhi_epi8(dm2, _mm_setzero_si128());
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__m128i d3l = _mm_unpacklo_epi8(dm3, _mm_setzero_si128());
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__m128i d3h = _mm_unpackhi_epi8(dm3, _mm_setzero_si128());
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__m128i sum0 = _mm_add_epi16(d0l, d1l);
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__m128i sum1 = _mm_add_epi16(d0h, d1h);
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__m128i sum2 = _mm_add_epi16(d2l, d3l);
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__m128i sum3 = _mm_add_epi16(d2h, d3h);
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__m128i sum0l = _mm_unpacklo_epi16(sum0, _mm_setzero_si128());
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__m128i sum0h = _mm_unpackhi_epi16(sum0, _mm_setzero_si128());
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__m128i sum1l = _mm_unpacklo_epi16(sum1, _mm_setzero_si128());
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__m128i sum1h = _mm_unpackhi_epi16(sum1, _mm_setzero_si128());
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__m128i sum2l = _mm_unpacklo_epi16(sum2, _mm_setzero_si128());
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__m128i sum2h = _mm_unpackhi_epi16(sum2, _mm_setzero_si128());
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__m128i sum3l = _mm_unpacklo_epi16(sum3, _mm_setzero_si128());
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__m128i sum3h = _mm_unpackhi_epi16(sum3, _mm_setzero_si128());
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__m128i b0 = _mm_add_epi32(sum0l, sum0h);
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__m128i b1 = _mm_add_epi32(sum1l, sum1h);
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__m128i b2 = _mm_add_epi32(sum2l, sum2h);
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__m128i b3 = _mm_add_epi32(sum3l, sum3h);
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__m128i a0 = _mm_add_epi32(b2, b3);
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__m128i a1 = _mm_add_epi32(b0, b1);
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__m128i a2 = _mm_add_epi32(b1, b3);
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__m128i a3 = _mm_add_epi32(b0, b2);
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_mm_storeu_si128((__m128i*)&err[0], a0);
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_mm_storeu_si128((__m128i*)&err[1], a1);
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_mm_storeu_si128((__m128i*)&err[2], a2);
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_mm_storeu_si128((__m128i*)&err[3], a3);
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#else
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unsigned int terr[4][4];
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memset(terr, 0, 16 * sizeof(unsigned int));
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for( int j=0; j<4; j++ )
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{
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for( int i=0; i<4; i++ )
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{
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int index = (j & 2) + (i >> 1);
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unsigned int d = *data++;
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terr[index][0] += d;
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d = *data++;
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terr[index][1] += d;
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d = *data++;
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terr[index][2] += d;
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data++;
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}
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}
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for( int i=0; i<3; i++ )
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{
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err[0][i] = terr[2][i] + terr[3][i];
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err[1][i] = terr[0][i] + terr[1][i];
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err[2][i] = terr[1][i] + terr[3][i];
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err[3][i] = terr[0][i] + terr[2][i];
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}
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for( int i=0; i<4; i++ )
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{
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err[i][3] = 0;
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}
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#endif
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}
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static unsigned int CalcError( const unsigned int block[4], const v4i& average )
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{
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unsigned int err = 0x3FFFFFFF; // Big value to prevent negative values, but small enough to prevent overflow
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err -= block[0] * 2 * average[2];
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err -= block[1] * 2 * average[1];
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err -= block[2] * 2 * average[0];
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err += 8 * ( sq( average[0] ) + sq( average[1] ) + sq( average[2] ) );
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return err;
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}
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void ProcessAverages( v4i* a )
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{
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#ifdef __SSE4_1__
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for( int i=0; i<2; i++ )
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{
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__m128i d = _mm_loadu_si128((__m128i*)a[i*2].data());
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__m128i t = _mm_add_epi16(_mm_mullo_epi16(d, _mm_set1_epi16(31)), _mm_set1_epi16(128));
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__m128i c = _mm_srli_epi16(_mm_add_epi16(t, _mm_srli_epi16(t, 8)), 8);
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__m128i c1 = _mm_shuffle_epi32(c, _MM_SHUFFLE(3, 2, 3, 2));
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__m128i diff = _mm_sub_epi16(c, c1);
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diff = _mm_max_epi16(diff, _mm_set1_epi16(-4));
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diff = _mm_min_epi16(diff, _mm_set1_epi16(3));
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__m128i co = _mm_add_epi16(c1, diff);
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c = _mm_blend_epi16(co, c, 0xF0);
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__m128i a0 = _mm_or_si128(_mm_slli_epi16(c, 3), _mm_srli_epi16(c, 2));
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_mm_storeu_si128((__m128i*)a[4+i*2].data(), a0);
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}
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for( int i=0; i<2; i++ )
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{
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__m128i d = _mm_loadu_si128((__m128i*)a[i*2].data());
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__m128i t0 = _mm_add_epi16(_mm_mullo_epi16(d, _mm_set1_epi16(15)), _mm_set1_epi16(128));
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__m128i t1 = _mm_srli_epi16(_mm_add_epi16(t0, _mm_srli_epi16(t0, 8)), 8);
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__m128i t2 = _mm_or_si128(t1, _mm_slli_epi16(t1, 4));
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_mm_storeu_si128((__m128i*)a[i*2].data(), t2);
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}
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#else
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for( int i=0; i<2; i++ )
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{
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for( int j=0; j<3; j++ )
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{
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int32_t c1 = mul8bit( a[i*2+1][j], 31 );
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int32_t c2 = mul8bit( a[i*2][j], 31 );
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int32_t diff = c2 - c1;
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if( diff > 3 ) diff = 3;
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else if( diff < -4 ) diff = -4;
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int32_t co = c1 + diff;
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a[5+i*2][j] = ( c1 << 3 ) | ( c1 >> 2 );
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a[4+i*2][j] = ( co << 3 ) | ( co >> 2 );
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}
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}
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for( int i=0; i<4; i++ )
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{
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a[i][0] = g_avg2[mul8bit( a[i][0], 15 )];
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a[i][1] = g_avg2[mul8bit( a[i][1], 15 )];
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a[i][2] = g_avg2[mul8bit( a[i][2], 15 )];
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}
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#endif
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}
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static void EncodeAverages( uint64_t& _d, const v4i* a, size_t idx )
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{
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auto d = _d;
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d |= ( idx << 24 );
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size_t base = idx << 1;
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if( ( idx & 0x2 ) == 0 )
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{
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for( int i=0; i<3; i++ )
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{
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d |= uint64_t( a[base+0][i] >> 4 ) << ( i*8 );
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d |= uint64_t( a[base+1][i] >> 4 ) << ( i*8 + 4 );
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}
|
|
}
|
|
else
|
|
{
|
|
for( int i=0; i<3; i++ )
|
|
{
|
|
d |= uint64_t( a[base+1][i] & 0xF8 ) << ( i*8 );
|
|
int32_t c = ( ( a[base+0][i] & 0xF8 ) - ( a[base+1][i] & 0xF8 ) ) >> 3;
|
|
c &= ~0xFFFFFFF8;
|
|
d |= ((uint64_t)c) << ( i*8 );
|
|
}
|
|
}
|
|
_d = d;
|
|
}
|
|
|
|
static uint64_t CheckSolid( const uint8_t* src )
|
|
{
|
|
#ifdef __SSE4_1__
|
|
__m128i d0 = _mm_loadu_si128(((__m128i*)src) + 0);
|
|
__m128i d1 = _mm_loadu_si128(((__m128i*)src) + 1);
|
|
__m128i d2 = _mm_loadu_si128(((__m128i*)src) + 2);
|
|
__m128i d3 = _mm_loadu_si128(((__m128i*)src) + 3);
|
|
|
|
__m128i c = _mm_shuffle_epi32(d0, _MM_SHUFFLE(0, 0, 0, 0));
|
|
|
|
__m128i c0 = _mm_cmpeq_epi8(d0, c);
|
|
__m128i c1 = _mm_cmpeq_epi8(d1, c);
|
|
__m128i c2 = _mm_cmpeq_epi8(d2, c);
|
|
__m128i c3 = _mm_cmpeq_epi8(d3, c);
|
|
|
|
__m128i m0 = _mm_and_si128(c0, c1);
|
|
__m128i m1 = _mm_and_si128(c2, c3);
|
|
__m128i m = _mm_and_si128(m0, m1);
|
|
|
|
if (!_mm_testc_si128(m, _mm_set1_epi32(-1)))
|
|
{
|
|
return 0;
|
|
}
|
|
#else
|
|
const uint8_t* ptr = src + 4;
|
|
for( int i=1; i<16; i++ )
|
|
{
|
|
if( memcmp( src, ptr, 4 ) != 0 )
|
|
{
|
|
return 0;
|
|
}
|
|
ptr += 4;
|
|
}
|
|
#endif
|
|
return 0x02000000 |
|
|
( (unsigned int)( src[0] & 0xF8 ) << 16 ) |
|
|
( (unsigned int)( src[1] & 0xF8 ) << 8 ) |
|
|
( (unsigned int)( src[2] & 0xF8 ) );
|
|
}
|
|
|
|
static void PrepareAverages( v4i a[8], const uint8_t* src, unsigned int err[4] )
|
|
{
|
|
Average( src, a );
|
|
ProcessAverages( a );
|
|
|
|
unsigned int errblock[4][4];
|
|
CalcErrorBlock( src, errblock );
|
|
|
|
for( int i=0; i<4; i++ )
|
|
{
|
|
err[i/2] += CalcError( errblock[i], a[i] );
|
|
err[2+i/2] += CalcError( errblock[i], a[i+4] );
|
|
}
|
|
}
|
|
|
|
static void FindBestFit( uint64_t terr[2][8], uint16_t tsel[16][8], v4i a[8], const uint32_t* id, const uint8_t* data )
|
|
{
|
|
for( size_t i=0; i<16; i++ )
|
|
{
|
|
uint16_t* sel = tsel[i];
|
|
unsigned int bid = id[i];
|
|
uint64_t* ter = terr[bid%2];
|
|
|
|
uint8_t b = *data++;
|
|
uint8_t g = *data++;
|
|
uint8_t r = *data++;
|
|
data++;
|
|
|
|
int dr = a[bid][0] - r;
|
|
int dg = a[bid][1] - g;
|
|
int db = a[bid][2] - b;
|
|
|
|
int pix = dr * 77 + dg * 151 + db * 28;
|
|
|
|
for( int t=0; t<8; t++ )
|
|
{
|
|
const int64_t* tab = g_table256[t];
|
|
unsigned int idx = 0;
|
|
uint64_t err = sq( tab[0] + pix );
|
|
for( int j=1; j<4; j++ )
|
|
{
|
|
uint64_t local = sq( tab[j] + pix );
|
|
if( local < err )
|
|
{
|
|
err = local;
|
|
idx = j;
|
|
}
|
|
}
|
|
*sel++ = idx;
|
|
*ter++ += err;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef __SSE4_1__
|
|
// Non-reference implementation, but faster. Produces same results as the AVX2 version
|
|
static void FindBestFit( uint32_t terr[2][8], uint16_t tsel[16][8], v4i a[8], const uint32_t* id, const uint8_t* data )
|
|
{
|
|
for( size_t i=0; i<16; i++ )
|
|
{
|
|
uint16_t* sel = tsel[i];
|
|
unsigned int bid = id[i];
|
|
uint32_t* ter = terr[bid%2];
|
|
|
|
uint8_t b = *data++;
|
|
uint8_t g = *data++;
|
|
uint8_t r = *data++;
|
|
data++;
|
|
|
|
int dr = a[bid][0] - r;
|
|
int dg = a[bid][1] - g;
|
|
int db = a[bid][2] - b;
|
|
|
|
// The scaling values are divided by two and rounded, to allow the differences to be in the range of signed int16
|
|
// This produces slightly different results, but is significant faster
|
|
__m128i pixel = _mm_set1_epi16(dr * 38 + dg * 76 + db * 14);
|
|
__m128i pix = _mm_abs_epi16(pixel);
|
|
|
|
// Taking the absolute value is way faster. The values are only used to sort, so the result will be the same.
|
|
// Since the selector table is symmetrical, we need to calculate the difference only for half of the entries.
|
|
__m128i error0 = _mm_abs_epi16(_mm_sub_epi16(pix, g_table128_SIMD[0]));
|
|
__m128i error1 = _mm_abs_epi16(_mm_sub_epi16(pix, g_table128_SIMD[1]));
|
|
|
|
__m128i index = _mm_and_si128(_mm_cmplt_epi16(error1, error0), _mm_set1_epi16(1));
|
|
__m128i minError = _mm_min_epi16(error0, error1);
|
|
|
|
// Exploiting symmetry of the selector table and use the sign bit
|
|
// This produces slightly different results, but is needed to produce same results as AVX2 implementation
|
|
__m128i indexBit = _mm_andnot_si128(_mm_srli_epi16(pixel, 15), _mm_set1_epi8(-1));
|
|
__m128i minIndex = _mm_or_si128(index, _mm_add_epi16(indexBit, indexBit));
|
|
|
|
// Squaring the minimum error to produce correct values when adding
|
|
__m128i squareErrorLo = _mm_mullo_epi16(minError, minError);
|
|
__m128i squareErrorHi = _mm_mulhi_epi16(minError, minError);
|
|
|
|
__m128i squareErrorLow = _mm_unpacklo_epi16(squareErrorLo, squareErrorHi);
|
|
__m128i squareErrorHigh = _mm_unpackhi_epi16(squareErrorLo, squareErrorHi);
|
|
|
|
squareErrorLow = _mm_add_epi32(squareErrorLow, _mm_loadu_si128(((__m128i*)ter) + 0));
|
|
_mm_storeu_si128(((__m128i*)ter) + 0, squareErrorLow);
|
|
squareErrorHigh = _mm_add_epi32(squareErrorHigh, _mm_loadu_si128(((__m128i*)ter) + 1));
|
|
_mm_storeu_si128(((__m128i*)ter) + 1, squareErrorHigh);
|
|
|
|
_mm_storeu_si128((__m128i*)sel, minIndex);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static uint64_t ProcessRGB( const uint8_t* src )
|
|
{
|
|
uint64_t d = CheckSolid( src );
|
|
if( d != 0 ) return d;
|
|
|
|
v4i a[8];
|
|
unsigned int err[4] = {};
|
|
PrepareAverages( a, src, err );
|
|
size_t idx = GetLeastError( err, 4 );
|
|
EncodeAverages( d, a, idx );
|
|
|
|
#if defined __SSE4_1__
|
|
uint32_t terr[2][8] = {};
|
|
#else
|
|
uint64_t terr[2][8] = {};
|
|
#endif
|
|
uint16_t tsel[16][8];
|
|
auto id = g_id[idx];
|
|
FindBestFit( terr, tsel, a, id, src );
|
|
|
|
return FixByteOrder( EncodeSelectors( d, terr, tsel, id ) );
|
|
}
|
|
|
|
void CompressImageEtc1( const char* src, char* dst, int w, int h )
|
|
{
|
|
assert( (w % 4) == 0 && (h % 4) == 0 );
|
|
|
|
uint32_t buf[4*4];
|
|
int i = 0;
|
|
|
|
auto ptr = dst;
|
|
auto blocks = w * h / 16;
|
|
do
|
|
{
|
|
auto tmp = (char*)buf;
|
|
for( int x=0; x<4; x++ )
|
|
{
|
|
memcpy( tmp, src, 4 );
|
|
memcpy( tmp + 4, src + w * 4, 4 );
|
|
memcpy( tmp + 8, src + w * 8, 4 );
|
|
memcpy( tmp + 12, src + w * 12, 4 );
|
|
src += 4;
|
|
tmp += 16;
|
|
}
|
|
if( ++i == w/4 )
|
|
{
|
|
src += w * 3 * 4;
|
|
i = 0;
|
|
}
|
|
|
|
const auto c = ProcessRGB( (uint8_t*)buf );
|
|
memcpy( ptr, &c, sizeof( uint64_t ) );
|
|
ptr += sizeof( uint64_t );
|
|
}
|
|
while( --blocks );
|
|
}
|
|
|
|
}
|