zger.c

来自「Optimized GotoBLAS libraries」· C语言 代码 · 共 96 行

/*********************************************************************/
/*                                                                   */
/*             Optimized BLAS libraries                              */
/*                     By Kazushige Goto <[e-mail]>     */
/*                                                                   */
/* Copyright (c) The University of Texas, 2005. All rights reserved. */
/* UNIVERSITY EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES CONCERNING  */
/* THIS SOFTWARE AND DOCUMENTATION, INCLUDING ANY WARRANTIES OF      */
/* MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE,              */
/* NON-INFRINGEMENT AND WARRANTIES OF PERFORMANCE, AND ANY WARRANTY  */
/* THAT MIGHT OTHERWISE ARISE FROM COURSE OF DEALING OR USAGE OF     */
/* TRADE. NO WARRANTY IS EITHER EXPRESS OR IMPLIED WITH RESPECT TO   */
/* THE USE OF THE SOFTWARE OR DOCUMENTATION.                         */
/* Under no circumstances shall University be liable for incidental, */
/* special, indirect, direct or consequential damages or loss of     */
/* profits, interruption of business, or related expenses which may  */
/* arise from use of Software or Documentation, including but not    */
/* limited to those resulting from defects in Software and/or        */
/* Documentation, or loss or inaccuracy of data of any kind.         */
/*********************************************************************/

#include <stdio.h>
#include "common.h"

int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha_r, FLOAT alpha_i,
	 FLOAT *x, BLASLONG incx,
	 FLOAT *y, BLASLONG incy,
	 FLOAT *a, BLASLONG lda, FLOAT *buffer){


  BLASLONG i, j;
  FLOAT *X;

  incx *= 2;
  incy *= 2;
  lda  *= 2;

  X = x;

  if (incx != 2){
    X = buffer;
    
    i = (m >> 2);
    if (i > 0) {
      do {
	*(X + 0) = *(x + 0);
	*(X + 1) = *(x + 1);
	x += incx;
	*(X + 2) = *(x + 0);
	*(X + 3) = *(x + 1);
	x += incx;
	*(X + 4) = *(x + 0);
	*(X + 5) = *(x + 1);
	x += incx;
	*(X + 6) = *(x + 0);
	*(X + 7) = *(x + 1);
	x += incx;
	X += 8;
	i --;
      } while (i > 0);
    }

    i = (m & 3);
    if (i > 0) {
      do {
	*(X + 0) = *(x + 0);
	*(X + 1) = *(x + 1);
	X += 2;
	x += incx;
	i --;
      } while (i > 0);
    }

    X = buffer;
  }
    
  for (j = 0; j < n; j++) {
    FLOAT beta_r = *(y + 0);
    FLOAT beta_i = *(y + 1);
    y += incy;

    ZAXPY_K(m, 0, 0, 
#ifndef CONJ
	        alpha_r * beta_r - alpha_i * beta_i,
	        alpha_r * beta_i + alpha_i * beta_r,
#else
	        alpha_r * beta_r + alpha_i * beta_i,
	       -alpha_r * beta_i + alpha_i * beta_r,
#endif
	    X, 1, a + j * lda, 1, NULL, 0);
  }
  
  return 0;
}