124 lines
4.2 KiB
C
124 lines
4.2 KiB
C
/*********************************************************************/
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/* Copyright 2009, 2010 The University of Texas at Austin. */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or */
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/* without modification, are permitted provided that the following */
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/* conditions are met: */
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/* */
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/* 1. Redistributions of source code must retain the above */
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/* copyright notice, this list of conditions and the following */
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/* disclaimer. */
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/* */
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/* 2. Redistributions in binary form must reproduce the above */
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/* copyright notice, this list of conditions and the following */
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/* disclaimer in the documentation and/or other materials */
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/* provided with the distribution. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
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/* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */
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/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
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/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
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/* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */
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/* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
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/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
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/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */
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/* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */
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/* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
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/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */
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/* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
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/* POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/* The views and conclusions contained in the software and */
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/* documentation are those of the authors and should not be */
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/* interpreted as representing official policies, either expressed */
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/* or implied, of The University of Texas at Austin. */
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/*********************************************************************/
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#include <stdio.h>
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#include "common.h"
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#ifdef FUNCTION_PROFILE
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#include "functable.h"
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#endif
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#if defined(THUNDERX2T99) || defined(VULCAN) || defined(ARMV8) || defined(THUNDERX3T110)
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// Multithreaded swap gives performance benefits in ThunderX2T99
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#else
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// Disable multi-threading as it does not show any performance
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// benefits. Keep the multi-threading code for the record.
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#undef SMP
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#endif
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#ifndef CBLAS
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void NAME(blasint *N, FLOAT *x, blasint *INCX, FLOAT *y, blasint *INCY){
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blasint n = *N;
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blasint incx = *INCX;
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blasint incy = *INCY;
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#else
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void CNAME(blasint n, FLOAT *x, blasint incx, FLOAT *y, blasint incy){
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#endif
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#ifdef SMP
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int mode, nthreads;
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FLOAT dummyalpha[2] = {ZERO, ZERO};
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#endif
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#ifndef CBLAS
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PRINT_DEBUG_NAME;
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#else
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PRINT_DEBUG_CNAME;
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#endif
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if (n <= 0) return;
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IDEBUG_START;
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FUNCTION_PROFILE_START();
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if (incx < 0) x -= (n - 1) * incx;
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if (incy < 0) y -= (n - 1) * incy;
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#ifdef SMP
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//disable multi-thread when incx==0 or incy==0
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//In that case, the threads would be dependent.
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if (incx == 0 || incy == 0 || n < 2097152 * GEMM_MULTITHREAD_THRESHOLD / sizeof(FLOAT))
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nthreads = 1;
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else
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nthreads = num_cpu_avail(1);
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if (nthreads == 1) {
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#endif
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SWAP_K(n, 0, 0, ZERO, x, incx, y, incy, NULL, 0);
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#ifdef SMP
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} else {
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#ifdef XDOUBLE
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mode = BLAS_XDOUBLE | BLAS_REAL;
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#elif defined(DOUBLE)
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mode = BLAS_DOUBLE | BLAS_REAL;
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#else
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mode = BLAS_SINGLE | BLAS_REAL;
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#endif
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blas_level1_thread(mode, n, 0, 0, dummyalpha,
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x, incx, y, incy, NULL, 0, (void *)SWAP_K, nthreads);
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}
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#endif
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FUNCTION_PROFILE_END(1, 2 * n, 0);
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IDEBUG_END;
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return;
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}
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