Blame thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/driver/level2/trmv_U.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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const static FLOAT dp1 = 1.;
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int CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *b, BLASLONG incb, FLOAT *buffer){
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  BLASLONG i, is, min_i;
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  FLOAT *gemvbuffer = (FLOAT *)buffer;
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  FLOAT *B = b;
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  if (incb != 1) {
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    B = buffer;
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    gemvbuffer = (FLOAT *)(((BLASLONG)buffer + m * sizeof(FLOAT) + 4095) & ~4095);
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    COPY_K(m, b, incb, buffer, 1);
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  }
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  for (is = 0; is < m; is += DTB_ENTRIES){
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    min_i = MIN(m - is, DTB_ENTRIES);
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#ifndef TRANSA
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    if (is > 0){
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      GEMV_N(is, min_i, 0, dp1, 
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	     a + is * lda,  lda,
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	     B + is, 1,
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	     B,      1, gemvbuffer);
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    }
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#endif
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    for (i = 0; i < min_i; i++) {
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      FLOAT *AA = a + is + (i + is) * lda;
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      FLOAT *BB = B + is;
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#ifndef TRANSA
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      if (i > 0) AXPYU_K(i, 0, 0, BB[i], AA, 1, BB, 1, NULL, 0);
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#endif
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#ifndef UNIT
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      BB[i] *= AA[i];
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#endif
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#ifdef TRANSA
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      if (i < min_i - 1) BB[i] += DOTU_K(min_i - i - 1, AA + i + 1, 1, BB + i + 1, 1);
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#endif
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    }
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#ifdef TRANSA
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    if (m - is > min_i){
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      GEMV_T(m - is - min_i, min_i, 0, dp1, 
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	     a + is + min_i + is * lda,  lda,
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	     B + is + min_i, 1,
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	     B + is,         1, gemvbuffer);
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  }
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#endif
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  }
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  if (incb != 1) {
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    COPY_K(m, buffer, 1, b, incb);
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  }
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  return 0;
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}
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