/usr/include/fflas-ffpack/fflas/fflas_igemm/igemm.inl is in fflas-ffpack-common 2.2.2-5.
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// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
/*
* Copyright (C) 2013,2014 Pascal Giorgi
*
* Written by Pascal Giorgi <pascal.giorgi@lirmm.fr>
* the code is inspired and adapted from the Eigen library
* modified by Brice Boyer (briceboyer) <boyer.brice@gmail.com>
*
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*.
*/
#ifndef __FFLASFFPACK_fflas_igemm_igemm_INL
#define __FFLASFFPACK_fflas_igemm_igemm_INL
#include "fflas-ffpack/utils/fflas_memory.h"
namespace FFLAS { namespace Protected {
// Assume matrices A,B,C are stored in column major order
template<enum FFLAS_TRANSPOSE tA, enum FFLAS_TRANSPOSE tB>
void igemm_colmajor(size_t rows, size_t cols, size_t depth,
const int64_t alpha,
const int64_t* A, size_t lda, const int64_t* B, size_t ldb,
int64_t* C, size_t ldc)
{
FFLASFFPACK_check(alpha != 0);
switch(alpha) {
case 1:
igemm_colmajor<tA,tB,number_kind::one>(rows,cols,depth,
alpha,A,lda,B,ldb,
C,ldc);
break;
case -1:
igemm_colmajor<tA,tB,number_kind::mone>(rows,cols,depth,
alpha,A,lda,B,ldb,
C,ldc);
break;
default:
igemm_colmajor<tA,tB,number_kind::other>(rows,cols,depth,
alpha,A,lda,B,ldb,
C,ldc);
}
}
template<enum FFLAS_TRANSPOSE tA, enum FFLAS_TRANSPOSE tB, enum number_kind alpha_kind>
void igemm_colmajor(size_t rows, size_t cols, size_t depth,
const int64_t alpha,
const int64_t* A, size_t lda, const int64_t* B, size_t ldb,
int64_t* C, size_t ldc)
{
using simd = Simd<int64_t> ;
size_t mc,kc,nc;
mc=rows;
nc=cols;
kc=depth;
FFLAS::details::BlockingFactor(mc,nc,kc);
size_t sizeA = mc*kc;
size_t sizeB = kc*cols;
size_t sizeW = simd::vect_size*kc*_nr; // store data duplicated by the number of elements fitting in vector register
// these data must be simd::alignment byte aligned
int64_t *blockA, *blockB, *blockW;
blockA = fflas_new<int64_t>(sizeA, (Alignment)simd::alignment);
blockB = fflas_new<int64_t>(sizeB, (Alignment)simd::alignment);
blockW = fflas_new<int64_t>(sizeW, (Alignment)simd::alignment);
// For each horizontal panel of B, and corresponding vertical panel of A
for(size_t k2=0; k2<depth; k2+=kc){
const size_t actual_kc = std::min(k2+kc,depth)-k2;
FFLASFFPACK_check(kc <= depth);
// pack horizontal panel of B into sequential memory (L2 cache)
if (tB == FflasNoTrans)
FFLAS::details::pack_rhs<_nr,false>(blockB, B+k2, ldb, actual_kc, cols);
else
FFLAS::details::pack_lhs<_nr,true>(blockB, B+k2*ldb, ldb, cols, actual_kc);
// For each mc x kc block of the lhs's vertical panel...
for(size_t i2=0; i2<rows; i2+=mc){
const size_t actual_mc = std::min(i2+mc,rows)-i2;
FFLASFFPACK_check(mc <= rows);
// pack a chunk of the vertical panel of A into a sequential memory (L1 cache)
if (tA == FflasNoTrans)
FFLAS::details::pack_lhs<_mr,false>(blockA, A+i2+k2*lda, lda, actual_mc, actual_kc);
else
FFLAS::details::pack_rhs<_mr,true>(blockA, A+i2*lda+k2, lda, actual_kc, actual_mc);
// call block*panel kernel
FFLAS::details::igebp<alpha_kind>(actual_mc, cols, actual_kc
, alpha
, blockA, actual_kc, blockB, actual_kc
, C+i2, ldc
, blockW);
}
}
fflas_delete(blockA);
fflas_delete(blockB);
fflas_delete(blockW);
}
void igemm( const enum FFLAS_TRANSPOSE TransA, const enum FFLAS_TRANSPOSE TransB,
size_t rows, size_t cols, size_t depth
, const int64_t alpha
, const int64_t* A, size_t lda, const int64_t* B, size_t ldb
, const int64_t beta
, int64_t* C, size_t ldc
)
{
if (!rows || !cols) {
return ;
}
//! @todo use primitive (no Field()) and specialise for int64.
// CP: fscalin assumes C in row major mode and we are here in col major mode
// hence let's transpose the arguments.
fscalin(Givaro::ZRing<int64_t>(),cols,rows, beta,C,ldc);
if (!depth || alpha == 0) {
return ;
}
if (TransA == FflasNoTrans) {
if (TransB == FflasNoTrans) {
igemm_colmajor<FflasNoTrans,FflasNoTrans>(rows, cols, depth, alpha, A, lda, B, ldb, C, ldc);
}
else {
igemm_colmajor<FflasNoTrans,FflasTrans>(rows, cols, depth, alpha, A, lda, B, ldb, C, ldc);
}
}
else {
if (TransB == FflasNoTrans) {
igemm_colmajor<FflasTrans,FflasNoTrans>(rows, cols, depth, alpha, A, lda, B, ldb, C, ldc);
}
else {
igemm_colmajor<FflasTrans,FflasTrans>(rows, cols, depth, alpha, A, lda, B, ldb, C, ldc);
}
}
}
} // Protected
} // FFLAS
// igemm
namespace FFLAS {
inline void igemm_(const enum FFLAS_ORDER Order, const enum FFLAS_TRANSPOSE TransA, const enum FFLAS_TRANSPOSE TransB,
const size_t M, const size_t N, const size_t K,
const int64_t alpha,
const int64_t *A, const size_t lda,
const int64_t *B, const size_t ldb,
const int64_t beta,
int64_t *C, const size_t ldc)
{
if (Order == FflasColMajor)
Protected::igemm(TransA,TransB,M,N,K,alpha,A,lda,B,ldb,beta,C,ldc);
else
Protected::igemm(TransB,TransA,N,M,K,alpha,B,ldb,A,lda,beta,C,ldc);
}
} // FFLAS
#endif // __FFLASFFPACK_fflas_igemm_igemm_INL
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