Blame thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/driver/level2/zsbmv_k.c

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/*********************************************************************/
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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></stdio.h>
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#include <ctype.h></ctype.h>
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#include "common.h"
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int CNAME(BLASLONG n, BLASLONG k, FLOAT alpha_r, FLOAT alpha_i,
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	  FLOAT *a, BLASLONG lda,
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	  FLOAT *x, BLASLONG incx, FLOAT *y, BLASLONG incy, void *buffer){
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  BLASLONG i, length;
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#ifndef LOWER
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  BLASLONG offset;
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#endif
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  FLOAT *X = x;
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  FLOAT *Y = y;
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  FLOAT *sbmvbuffer = (FLOAT *)buffer;
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  FLOAT *bufferY    = sbmvbuffer;
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  FLOAT *bufferX    = sbmvbuffer;
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  if (incy != 1) {
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    Y = bufferY;
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    bufferX    = (FLOAT *)(((BLASLONG)bufferY + n * sizeof(FLOAT) * COMPSIZE + 4095) & ~4095);
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    sbmvbuffer = bufferX;
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    COPY_K(n, y, incy, Y, 1);
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  }
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  if (incx != 1) {
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    X = bufferX;
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    sbmvbuffer = (FLOAT *)(((BLASLONG)bufferX + n * sizeof(FLOAT) * COMPSIZE + 4095) & ~4095);
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    COPY_K(n, x, incx, X, 1);
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  }
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#ifndef LOWER
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  offset = k;
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#endif
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  for (i = 0; i < n; i++) {
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#ifndef LOWER
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    length  = k - offset;
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    AXPYU_K(length + 1, 0, 0,
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	    alpha_r * X[i * 2 + 0] - alpha_i * X[i * 2 + 1], 
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	    alpha_r * X[i * 2 + 1] + alpha_i * X[i * 2 + 0], 
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	    a + offset * COMPSIZE, 1, Y + (i - length) * COMPSIZE, 1, NULL, 0);
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    if (length > 0) {
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      FLOAT _Complex result = DOTU_K(length, a + offset * COMPSIZE, 1, X + (i - length) * COMPSIZE, 1);
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      Y[i * 2 + 0] += alpha_r * CREAL(result) - alpha_i * CIMAG(result);
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      Y[i * 2 + 1] += alpha_r * CIMAG(result) + alpha_i * CREAL(result);
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      }
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    if (offset > 0) offset --;
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#else
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    length  = k;
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    if (n - i - 1 < k) length = n - i - 1;
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    AXPYU_K(length + 1, 0, 0,
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	    alpha_r * X[i * 2 + 0] - alpha_i * X[i * 2 + 1], 
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	    alpha_r * X[i * 2 + 1] + alpha_i * X[i * 2 + 0], 
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	    a, 1, Y + i * COMPSIZE, 1, NULL, 0);
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    if (length > 0) {
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      FLOAT _Complex result = DOTU_K(length, a + COMPSIZE, 1, X + (i + 1) * COMPSIZE, 1);
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      Y[i * 2 + 0] += alpha_r * CREAL(result) - alpha_i * CIMAG(result);
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      Y[i * 2 + 1] += alpha_r * CIMAG(result) + alpha_i * CREAL(result);
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      }
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#endif
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    a += lda * 2;
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  }
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  if (incy != 1) {
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    COPY_K(n, Y, 1, y, incy);
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  }
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  return 0;
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}
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