89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/***************************************************************************
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Copyright (c) 2021, The OpenBLAS Project
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. Neither the name of the OpenBLAS project nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include "common.h"
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int CNAME(int transa, int transb, BLASLONG M, BLASLONG N, BLASLONG K, FLOAT alpha, FLOAT beta)
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{
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double MNK = (double) M * (double) N * (double) K;
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#if defined(DOUBLE) // dgemm
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// gcc11 (minor <= 2) has an issue when multiple assemble_pairs are used. This
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// issue affects both dgemm_nn and dgemm_tn.
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#if (defined(__GNUC__) && (__GNUC__ == 11 && __GNUC_MINOR__ <= 2))
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if (!transb)
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return 0;
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#endif
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if (MNK <= 54.0*54.0*54.0)
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return 1;
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#else // sgemm
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#if defined(__GNUC__) && defined(__clang__)
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// clang generates code with register spilling for the region of code with
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// packing, thus, we had to disable this optimization for clang. Given that
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// the packing on-demand used in this work is one of the reasons that lead the
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// small kernels to outperform the normal flow (when MNK increases), with it
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// disabled we had to reduce the MNK inputs used by the code generated by clang.
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if (MNK > 84.0*84.0*84.0)
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return 0;
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if (transa && !transb) {
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// sgemm_tn works better when packing on-demand is used
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if (MNK <= 64.0*64.0*64.0 && K >= 4)
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return 1;
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else
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return 0;
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}
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#else // gcc
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if (MNK > 100.0*100.0*100.0)
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return 0;
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#endif
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#ifdef SMP
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// Multi-threading execution outperforms (or approaches) the execution of the
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// small kernel.
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if (num_cpu_avail(3) > 1) {
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if (MNK <= 64.0*64.0*64.0)
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return 1;
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} else {
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return 1;
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}
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#else
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return 1;
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#endif
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#endif
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return 0;
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}
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