/*********************************************************************/

/* 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></stdio.h>

#include <ctype.h></ctype.h>

#include "common.h"

#ifdef FUNCTION_PROFILE

#include "functable.h"

#endif

#ifdef XDOUBLE

#define ERROR_NAME "QSYR2 "

#elif defined(DOUBLE)

#define ERROR_NAME "ZSYR2 "

#else

#define ERROR_NAME "CSYR2 "

#endif

static int (*syr2[])(BLASLONG, FLOAT, FLOAT, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *) = {

#ifdef XDOUBLE

  xsyr2_U, xsyr2_L,

#elif defined(DOUBLE)

  zsyr2_U, zsyr2_L,

#else

  csyr2_U, csyr2_L,

#endif

};

#ifdef SMP

static int (*syr2_thread[])(BLASLONG, FLOAT *, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, int) = {

#ifdef XDOUBLE

  xsyr2_thread_U, xsyr2_thread_L,

#elif defined(DOUBLE)

  zsyr2_thread_U, zsyr2_thread_L,

#else

  csyr2_thread_U, csyr2_thread_L,

#endif

};

#endif

void NAME(char *UPLO, blasint *N, FLOAT  *ALPHA, 

	 FLOAT  *x, blasint *INCX, FLOAT *y, blasint *INCY, FLOAT *a, blasint *LDA){

  char uplo_arg = *UPLO;

  blasint n		= *N;

  FLOAT alpha_r	= ALPHA[0];

  FLOAT alpha_i	= ALPHA[1];

  blasint lda	= *LDA;

  blasint incx	= *INCX;

  blasint incy	= *INCY;

  blasint info;

  int uplo;

  FLOAT *buffer;

#ifdef SMP

  int nthreads;

#endif

  PRINT_DEBUG_NAME;

  TOUPPER(uplo_arg);

  uplo  = -1;

  if (uplo_arg  == 'U') uplo  = 0;

  if (uplo_arg  == 'L') uplo  = 1;

  info = 0;

  if (lda  < MAX(1, n))   info =  9;

  if (incy == 0)          info =  7;

  if (incx == 0)          info =  5;

  if (n < 0)              info =  2;

  if (uplo  < 0)          info =  1;

  if (info != 0) {

    BLASFUNC(xerbla)(ERROR_NAME, &info, sizeof(ERROR_NAME));

    return;

  }

  if (n == 0) return;

  if ((alpha_r == ZERO) && (alpha_i == ZERO)) return;

  IDEBUG_START;

  FUNCTION_PROFILE_START();

  if (incx < 0 ) x -= (n - 1) * incx;

  if (incy < 0 ) y -= (n - 1) * incy;

  buffer = (FLOAT *)blas_memory_alloc(1);

#ifdef SMP

  nthreads = num_cpu_avail(2);

  if (nthreads == 1) {

#endif

    (syr2[uplo])(n, alpha_r, alpha_i, x, incx, y, incy, a, lda, buffer);

#ifdef SMP

  } else {

    (syr2_thread[uplo])(n, ALPHA, x, incx, y, incy, a, lda, buffer, nthreads);

  }

#endif

  blas_memory_free(buffer);

  FUNCTION_PROFILE_END(4, n * n / 2 + 2 * n, 2 * n * n);

  IDEBUG_END;

  return;

}