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/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. 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. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``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 UNIVERSITY OF TEXAS AT */
/* AUSTIN 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. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/
#include <stdio.h>
#include "common.h"
#ifdef FUNCTION_PROFILE
#include "functable.h"
#endif
#if defined(Z13)
#define MULTI_THREAD_MINIMAL 200000
#else
#define MULTI_THREAD_MINIMAL 10000
#endif
#ifndef CBLAS
void NAME(blasint *N, FLOAT *ALPHA, FLOAT *x, blasint *INCX, FLOAT *y, blasint *INCY){
blasint n = *N;
blasint incx = *INCX;
blasint incy = *INCY;
#else
#ifdef COMPLEX
void CNAME(blasint n, void *VALPHA, void *vx, blasint incx, void *vy, blasint incy){
FLOAT *ALPHA = (FLOAT*) VALPHA;
FLOAT *x = (FLOAT*) vx;
FLOAT *y = (FLOAT*) vy;
#else
void CNAME(blasint n, FLOAT *ALPHA, FLOAT *x, blasint incx, FLOAT *y, blasint incy){
#endif
#endif
FLOAT alpha_r = *(ALPHA + 0);
FLOAT alpha_i = *(ALPHA + 1);
#ifdef SMP
int mode, nthreads;
#endif
#ifndef CBLAS
PRINT_DEBUG_NAME;
#else
PRINT_DEBUG_CNAME;
#endif
if (n <= 0) return;
if ((alpha_r == ZERO) && (alpha_i == ZERO)) return;
if (incx == 0 && incy == 0) {
*y += n * (alpha_r * (*x) - alpha_i* (*(x+1)) );
*(y+1) += n * (alpha_i * (*x) + alpha_r * (*(x +1)) );
return;
}
IDEBUG_START;
FUNCTION_PROFILE_START();
if (incx < 0) x -= (n - 1) * incx * 2;
if (incy < 0) y -= (n - 1) * incy * 2;
#ifdef SMP
//disable multi-thread when incx==0 or incy==0
//In that case, the threads would be dependent.
//
//Temporarily work-around the low performance issue with small input size &
//multithreads.
if (incx == 0 || incy == 0 || n <= MULTI_THREAD_MINIMAL)
nthreads = 1;
else
nthreads = num_cpu_avail(1);
if (nthreads == 1) {
#endif
#ifndef CONJ
AXPYU_K (n, 0, 0, alpha_r, alpha_i, x, incx, y, incy, NULL, 0);
#else
AXPYC_K(n, 0, 0, alpha_r, alpha_i, x, incx, y, incy, NULL, 0);
#endif
#ifdef SMP
} else {
#ifdef XDOUBLE
mode = BLAS_XDOUBLE | BLAS_COMPLEX;
#elif defined(DOUBLE)
mode = BLAS_DOUBLE | BLAS_COMPLEX;
#else
mode = BLAS_SINGLE | BLAS_COMPLEX;
#endif
blas_level1_thread(mode, n, 0, 0, ALPHA, x, incx, y, incy, NULL, 0,
#ifndef CONJ
(int (*)(void))AXPYU_K,
#else
(int (*)(void))AXPYC_K,
#endif
nthreads);
}
#endif
FUNCTION_PROFILE_END(4, 2 * n, 2 * n);
IDEBUG_END;
return;
}
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