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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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#ifdef FUNCTION_PROFILE
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#include "functable.h"
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#endif
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#ifdef XDOUBLE
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#define ERROR_NAME "QSYR2 "
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#elif defined(DOUBLE)
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#define ERROR_NAME "DSYR2 "
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#else
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#define ERROR_NAME "SSYR2 "
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#endif
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static int (*syr2[])(BLASLONG, FLOAT, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *) = {
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#ifdef XDOUBLE
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  qsyr2_U, qsyr2_L,
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#elif defined(DOUBLE)
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  dsyr2_U, dsyr2_L,
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#else
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  ssyr2_U, ssyr2_L,
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#endif
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};
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#ifdef SMP
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static int (*syr2_thread[])(BLASLONG, FLOAT, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, BLASLONG, FLOAT *, int) = {
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#ifdef XDOUBLE
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  qsyr2_thread_U, qsyr2_thread_L,
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#elif defined(DOUBLE)
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  dsyr2_thread_U, dsyr2_thread_L,
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#else
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  ssyr2_thread_U, ssyr2_thread_L,
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#endif
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};
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#endif
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#ifndef CBLAS
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void NAME(char *UPLO, blasint *N, FLOAT  *ALPHA, 
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	 FLOAT  *x, blasint *INCX, FLOAT *y, blasint *INCY, FLOAT *a, blasint *LDA){
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  char uplo_arg = *UPLO;
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  blasint n		= *N;
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  FLOAT alpha	= *ALPHA;
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  blasint lda	= *LDA;
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  blasint incx	= *INCX;
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  blasint incy	= *INCY;
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  blasint info;
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  int uplo;
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  FLOAT *buffer;
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#ifdef SMP
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  int nthreads;
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#endif
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  PRINT_DEBUG_NAME;
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  TOUPPER(uplo_arg);
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  uplo  = -1;
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  if (uplo_arg  == 'U') uplo  = 0;
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  if (uplo_arg  == 'L') uplo  = 1;
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  info = 0;
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  if (lda  < MAX(1, n))   info =  9;
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  if (incy == 0)          info =  7;
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  if (incx == 0)          info =  5;
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  if (n < 0)              info =  2;
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  if (uplo  < 0)          info =  1;
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  if (info != 0) {
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    BLASFUNC(xerbla)(ERROR_NAME, &info, sizeof(ERROR_NAME));
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    return;
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  }
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#else
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void CNAME(enum CBLAS_ORDER order, enum CBLAS_UPLO Uplo, blasint n, FLOAT alpha, FLOAT *x, blasint incx, FLOAT *y, blasint incy, FLOAT *a, blasint lda) {
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  FLOAT *buffer;
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  int trans, uplo;
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  blasint info;
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#ifdef SMP
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  int nthreads;
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#endif
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  PRINT_DEBUG_CNAME;
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  trans = -1;
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  uplo  = -1;
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  info  =  0;
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  if (order == CblasColMajor) {
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    if (Uplo == CblasUpper) uplo  = 0;
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    if (Uplo == CblasLower) uplo  = 1;
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    info = -1;
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    if (lda  < MAX(1, n))   info =  9;
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    if (incy == 0)          info =  7;
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    if (incx == 0)          info =  5;
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    if (n < 0)              info =  2;
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    if (uplo  < 0)          info =  1;
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  }
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  if (order == CblasRowMajor) {
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    if (Uplo == CblasUpper) uplo  = 1;
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    if (Uplo == CblasLower) uplo  = 0;
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    info = -1;
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    if (lda  < MAX(1, n))   info =  9;
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    if (incy == 0)          info =  7;
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    if (incx == 0)          info =  5;
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    if (n < 0)              info =  2;
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    if (uplo  < 0)          info =  1;
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  }
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  if (info >= 0) {
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    BLASFUNC(xerbla)(ERROR_NAME, &info, sizeof(ERROR_NAME));
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    return;
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  }
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#endif
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  if (n == 0) return;
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  if (alpha == ZERO) return;
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  IDEBUG_START;
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  FUNCTION_PROFILE_START();
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  if (incx < 0 ) x -= (n - 1) * incx;
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  if (incy < 0 ) y -= (n - 1) * incy;
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  buffer = (FLOAT *)blas_memory_alloc(1);
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#ifdef SMP
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  nthreads = num_cpu_avail(2);
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  if (nthreads == 1) {
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#endif
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    (syr2[uplo])(n, alpha, x, incx, y, incy, a, lda, buffer);
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#ifdef SMP
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  } else {
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    (syr2_thread[uplo])(n, alpha, x, incx, y, incy, a, lda, buffer, nthreads);
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  }
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#endif
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  blas_memory_free(buffer);
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  FUNCTION_PROFILE_END(1, n * n / 2 + 2 * n, 2 * n * n);
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  IDEBUG_END;
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  return;
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}