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#include "stdafx.h"
#include <intrin.h>
#include "mulMatImpl.h"
#include "mulMatUtils.hpp"
using namespace CpuCompute;
// We want to keep code size reasonable, that's why these panel reshaping methods are in the base class
HRESULT MulMatBase::transposePanel( uint16_t* rdi, size_t i, size_t m2, size_t m3 ) const
{
assert( stridesA[ 0 ] == 1 );
const size_t heightFloats = (size_t)panelHeightRegisters * 8;
i *= heightFloats;
const uint16_t* rsi = (const uint16_t*)pa;
rsi += m3 * stridesA[ 3 ];
rsi += m2 * stridesA[ 2 ];
rsi += i * stridesA[ 1 ];
const size_t resultStride = heightFloats;
if( i + heightFloats <= resultSize[ 0 ] )
{
// A complete panel
for( size_t i = 0; i < panelHeightRegisters; i++ )
{
transpose8( rdi, length, rsi, stridesA[ 1 ], resultStride );
// Advance by 8 floats in the output buffer
rdi += 8;
// Advance by 8 rows in the source matrix
rsi += 8 * stridesA[ 1 ];
}
}
else
{
// A partial panel, at the bottom of the first argument matrix
const size_t remainder = resultSize[ 0 ] - i;
assert( remainder > 0 && remainder < heightFloats );
zeroAlignedMemory( rdi, resultStride * length * sizeof( uint16_t ) );
const size_t completePanels = remainder / 8;
for( size_t i = 0; i < completePanels; i++ )
{
transpose8( rdi, length, rsi, stridesA[ 1 ], resultStride );
rdi += 8;
rsi += 8 * stridesA[ 1 ];
}
const size_t lastPanel = remainder % 8;
if( 0 != lastPanel )
transpose8Partial( rdi, length, lastPanel, rsi, stridesA[ 1 ], resultStride );
}
return S_OK;
}
inline const uint16_t* MulMatBase::getPanelA( size_t i, size_t m2, size_t m3 ) const
{
const uint16_t* rsi = (const uint16_t*)pa;
rsi += m3 * stridesA[ 3 ];
rsi += m2 * stridesA[ 2 ];
rsi += i * stridesA[ 1 ];
return rsi;
}
HRESULT MulMatBase::copyPanelColumnMajor8( uint16_t* rdi, size_t i, size_t m2, size_t m3 ) const
{
assert( stridesA[ 1 ] == 1 );
assert( panelHeightRegisters == 1 );
constexpr size_t heightFloats = 8;
i *= heightFloats;
const uint16_t* rsi = getPanelA( i, m2, m3 );
constexpr size_t resultStride = heightFloats;
if( i + heightFloats <= resultSize[ 0 ] )
{
// A complete panel, height = 8 elements
copyColumnMajor( rdi, length, rsi, stridesA[ 0 ], resultStride );
}
else
{
// A partial panel, at the bottom of the first argument matrix
const size_t remainder = resultSize[ 0 ] - i;
assert( remainder > 0 && remainder < heightFloats );
copyColumnMajorPartial( rdi, length, remainder, rsi, stridesA[ 0 ], resultStride );
}
return S_OK;
}
__forceinline __m128i load8Partial( const uint16_t* x, size_t len )
{
assert( len > 0 && len < 8 );
__m128i ix = _mm_setzero_si128();
switch( len )
{
case 1: // load 2 bytes
ix = _mm_cvtsi32_si128( *x );
break;
case 2: // load 4 bytes
ix = _mm_cvtsi32_si128( *(const int*)x );
break;
case 3: // load 6 bytes
ix = _mm_cvtsi32_si128( *(const int*)x );
ix = _mm_insert_epi16( ix, x[ 2 ], 2 );
break;
case 4: // load 8 bytes
ix = _mm_cvtsi64_si128( *(const int64_t*)x );
break;
case 5: // load 10 bytes
ix = _mm_cvtsi64_si128( *(const int64_t*)x );
ix = _mm_insert_epi16( ix, x[ 4 ], 4 );
break;
case 6: // load 12 bytes
ix = _mm_cvtsi64_si128( *(const int64_t*)x );
ix = _mm_insert_epi32( ix, *(const int*)( x + 4 ), 2 );
break;
case 7: // load 14 bytes
ix = _mm_cvtsi64_si128( *(const int64_t*)x );
ix = _mm_insert_epi32( ix, *(const int*)( x + 4 ), 2 );
ix = _mm_insert_epi16( ix, x[ 6 ], 6 );
break;
}
return ix;
}
__forceinline __m256i load16Partial( const uint16_t* rsi, size_t len )
{
assert( len > 0 && len < 16 );
if( len < 8 )
{
__m128i low = load8Partial( rsi, len );
return _mm256_setr_m128i( low, _mm_setzero_si128() );
}
else if( len > 8 )
{
__m128i low = load16( (const int*)rsi );
__m128i high = load8Partial( rsi + 8, len - 8 );
return _mm256_setr_m128i( low, high );
}
else
{
__m128i low = load16( (const int*)rsi );
return _mm256_setr_m128i( low, _mm_setzero_si128() );
}
}
HRESULT MulMatBase::copyPanelColumnMajor16( uint16_t* rdi, size_t i, size_t m2, size_t m3 ) const
{
assert( stridesA[ 1 ] == 1 );
assert( panelHeightRegisters == 2 );
constexpr size_t heightFloats = 16;
i *= heightFloats;
const uint16_t* rsi = getPanelA( i, m2, m3 );
uint16_t* const rdiEnd = rdi + 16 * length;
if( i + heightFloats <= resultSize[ 0 ] )
{
// A complete panel, height = 16 elements
for( ; rdi < rdiEnd; rdi += 16, rsi += stridesA[ 0 ] )
{
__m256i v = _mm256_loadu_si256( ( const __m256i* )rsi );
_mm256_store_si256( ( __m256i* )rdi, v );
}
}
else
{
// A partial panel, at the bottom of the first argument matrix
const size_t remainder = resultSize[ 0 ] - i;
assert( remainder > 0 && remainder < heightFloats );
for( ; rdi < rdiEnd; rdi += 16, rsi += stridesA[ 0 ] )
{
__m256i v = load16Partial( rsi, remainder );
_mm256_store_si256( ( __m256i* )rdi, v );
}
}
return S_OK;
}
HRESULT MulMatBase::copyPanelColumnMajor32( uint16_t* rdi, size_t i, size_t m2, size_t m3 ) const
{
assert( stridesA[ 1 ] == 1 );
assert( panelHeightRegisters == 4 );
constexpr size_t heightFloats = 32;
i *= heightFloats;
const uint16_t* rsi = getPanelA( i, m2, m3 );
uint16_t* const rdiEnd = rdi + 32 * length;
if( i + heightFloats <= resultSize[ 0 ] )
{
// A complete panel, height = 32 elements
for( ; rdi < rdiEnd; rdi += 32, rsi += stridesA[ 0 ] )
{
__m256i v = _mm256_loadu_si256( ( const __m256i* )rsi );
_mm256_store_si256( ( __m256i* )rdi, v );
v = _mm256_loadu_si256( ( const __m256i* )( rsi + 16 ) );
_mm256_store_si256( ( __m256i* )( rdi + 16 ), v );
}
}
else
{
// A partial panel, at the bottom of the first argument matrix
const size_t remainder = resultSize[ 0 ] - i;
assert( remainder > 0 && remainder < heightFloats );
// _mm256_setzero_si256 probably compiles into vpxor, that's AVX2, we don't want that here
const __m256 zero = _mm256_setzero_ps();
for( ; rdi < rdiEnd; rdi += 32, rsi += stridesA[ 0 ] )
{
if( remainder < 16 )
{
__m256i v = load16Partial( rsi, remainder );
_mm256_store_si256( ( __m256i* )rdi, v );
_mm256_store_ps( (float*)( rdi + 16 ), zero );
}
else if( remainder > 16 )
{
__m256i v = _mm256_loadu_si256( ( const __m256i* )rsi );
_mm256_store_si256( ( __m256i* )rdi, v );
v = load16Partial( rsi + 16, remainder - 16 );
_mm256_store_si256( ( __m256i* )( rdi + 16 ), v );
}
else
{
__m256i v = _mm256_loadu_si256( ( const __m256i* )rsi );
_mm256_store_si256( ( __m256i* )rdi, v );
_mm256_store_ps( (float*)( rdi + 16 ), zero );
}
}
}
return S_OK;
}
HRESULT MulMatBase::gatherPanel( uint16_t* rdi, size_t i, size_t m2, size_t m3 ) const
{
// BTW, I never saw this method called.
const size_t heightFloats = (size_t)panelHeightRegisters * 8;
const size_t length = this->length;
zeroAlignedMemory( rdi, length * heightFloats * sizeof( uint16_t ) );
const size_t height = std::min( heightFloats, resultSize[ 0 ] - i );
const size_t strideElement = stridesA[ 0 ];
const size_t strideRow = stridesA[ 1 ];
const uint16_t* rsi = getPanelA( i * heightFloats, m2, m3 );
if( strideElement < strideRow )
{
for( size_t r = 0; r < height; r++, rsi += strideRow, rdi++ )
{
const uint16_t* sourceRow = rsi;
uint16_t* destRow = rdi;
for( size_t c = 0; c < length; c++, sourceRow += strideElement, destRow += heightFloats )
*destRow = *sourceRow;
}
}
else
{
for( size_t c = 0; c < length; c++, rsi += strideElement, rdi += heightFloats )
{
const uint16_t* sourceCol = rsi;
uint16_t* destCol = rdi;
for( size_t r = 0; r < height; r++, sourceCol += strideRow, destCol++ )
*destCol = *sourceCol;
}
}
return S_OK;
}
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