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/*
BLIS
An object-based framework for developing high-performance BLAS-like
libraries.
Copyright (C) 2014, The University of Texas at Austin
Copyright (C) 2018 - 2020, Advanced Micro Devices, Inc.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name(s) of the copyright holder(s) nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "blis.h"
void bli_gemmt_front
(
obj_t* alpha,
obj_t* a,
obj_t* b,
obj_t* beta,
obj_t* c,
cntx_t* cntx,
rntm_t* rntm,
cntl_t* cntl
)
{
bli_init_once();
obj_t a_local;
obj_t b_local;
obj_t c_local;
// If C has a zero dimension, return early.
if ( bli_obj_has_zero_dim( c ) )
{
return;
}
// If alpha is zero, or if A or B has a zero dimension, scale C by beta
// and return early.
if ( bli_obj_equals( alpha, &BLIS_ZERO ) ||
bli_obj_has_zero_dim( a ) ||
bli_obj_has_zero_dim( b ) )
{
bli_scalm( beta, c );
return;
}
// Alias A, B, and C in case we need to apply transformations.
bli_obj_alias_to( a, &a_local );
bli_obj_alias_to( b, &b_local );
bli_obj_alias_to( c, &c_local );
// Set the obj_t buffer field to the location currently implied by the row
// and column offsets and then zero the offsets. If any of the original
// obj_t's were views into larger matrices, this step effectively makes
// those obj_t's "forget" their lineage.
bli_obj_reset_origin( &a_local );
bli_obj_reset_origin( &b_local );
bli_obj_reset_origin( &c_local );
// An optimization: If C is stored by rows and the micro-kernel prefers
// contiguous columns, or if C is stored by columns and the micro-kernel
// prefers contiguous rows, transpose the entire operation to allow the
// micro-kernel to access elements of C in its preferred manner.
if ( bli_cntx_l3_vir_ukr_dislikes_storage_of( &c_local, BLIS_GEMM_UKR, cntx ) )
{
bli_obj_swap( &a_local, &b_local );
bli_obj_induce_trans( &a_local );
bli_obj_induce_trans( &b_local );
bli_obj_induce_trans( &c_local );
}
// Set the pack schemas within the objects, as appropriate.
bli_l3_set_schemas( &a_local, &b_local, &c_local, cntx );
// Parse and interpret the contents of the rntm_t object to properly
// set the ways of parallelism for each loop, and then make any
// additional modifications necessary for the current operation.
bli_rntm_set_ways_for_op
(
BLIS_GEMM,
BLIS_LEFT, // ignored for gemm/hemm/symm/gemmt
bli_obj_length( &c_local ),
bli_obj_width( &c_local ),
bli_obj_width( &a_local ),
rntm
);
// Invoke the internal back-end via the thread handler.
bli_l3_thread_decorator
(
bli_l3_int,
BLIS_GEMMT, // operation family id
alpha,
&a_local,
&b_local,
beta,
&c_local,
cntx,
rntm,
cntl
);
}
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