OpenBLAS/driver/level2/zsyr2_k.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
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/*********************************************************************/

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

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

  BLASLONG i;
  FLOAT *X, *Y;

  X = x;
  Y = y;

  lda *= 2;

  if (incx != 1) {
    COPY_K(m, x, incx, buffer, 1);
    X = buffer;
  }

  if (incy != 1) {
    COPY_K(m, y, incy, (FLOAT *)((BLASLONG)buffer + (BUFFER_SIZE / 2)), 1);
    Y = (FLOAT *)((BLASLONG)buffer + (BUFFER_SIZE / 2));
  }

  for (i = 0; i < m; i++){
#ifndef LOWER
    AXPYU_K(i + 1, 0, 0,
	   alpha_r * X[i * 2 + 0] - alpha_i * X[i * 2 + 1],
	   alpha_i * X[i * 2 + 0] + alpha_r * X[i * 2 + 1],
	   Y,     1, a, 1, NULL, 0);
    AXPYU_K(i + 1, 0, 0,
	   alpha_r * Y[i * 2 + 0] - alpha_i * Y[i * 2 + 1],
	   alpha_i * Y[i * 2 + 0] + alpha_r * Y[i * 2 + 1],
	   X,     1, a, 1, NULL, 0);
    a += lda;
#else
    AXPYU_K(m - i, 0, 0,
	   alpha_r * X[i * 2 + 0] - alpha_i * X[i * 2 + 1],
	   alpha_i * X[i * 2 + 0] + alpha_r * X[i * 2 + 1],
	   Y + i * 2, 1, a, 1, NULL, 0);
    AXPYU_K(m - i, 0, 0,
	   alpha_r * Y[i * 2 + 0] - alpha_i * Y[i * 2 + 1],
	   alpha_i * Y[i * 2 + 0] + alpha_r * Y[i * 2 + 1],
	   X + i * 2, 1, a, 1, NULL, 0);
    a += 2 + lda;
#endif
    }

  return 0;
}