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

/* 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    */

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/*    (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 "QSBMV "

#elif defined(DOUBLE)

#define ERROR_NAME "DSBMV "

#else

#define ERROR_NAME "SSBMV "

#endif

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

#ifdef XDOUBLE

  qsbmv_U, qsbmv_L,

#elif defined(DOUBLE)

  dsbmv_U, dsbmv_L,

#else

  ssbmv_U, ssbmv_L,

#endif

};

#ifdef SMP

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

#ifdef XDOUBLE

  qsbmv_thread_U, qsbmv_thread_L,

#elif defined(DOUBLE)

  dsbmv_thread_U, dsbmv_thread_L,

#else

  ssbmv_thread_U, ssbmv_thread_L,

#endif

};

#endif

#ifndef CBLAS

void NAME(char *UPLO, blasint *N, blasint *K, FLOAT  *ALPHA, FLOAT *a, blasint *LDA, 

            FLOAT  *x, blasint *INCX, FLOAT *BETA, FLOAT *y, blasint *INCY){

  char uplo_arg = *UPLO;

  blasint n	= *N;

  blasint k	= *K;

  FLOAT alpha	= *ALPHA;

  blasint lda	= *LDA;

  blasint incx	= *INCX;

  FLOAT beta	= *BETA;

  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 (incy == 0)          info = 11;

  if (incx == 0)          info =  8;

  if (lda  < k + 1)       info =  6;

  if (k < 0)              info =  3;

  if (n < 0)              info =  2;

  if (uplo  < 0)          info =  1;

  if (info != 0) {

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

    return;

  }

#else

void CNAME(enum CBLAS_ORDER order,

	   enum CBLAS_UPLO Uplo,

	   blasint n, blasint k,

	   FLOAT alpha,

	   FLOAT  *a, blasint lda,

	   FLOAT  *x, blasint incx,

	   FLOAT beta,

	   FLOAT  *y, blasint incy){

  FLOAT *buffer;

  int uplo;

  blasint info;

#ifdef SMP

  int nthreads;

#endif

  PRINT_DEBUG_CNAME;

  uplo  = -1;

  info  =  0;

  if (order == CblasColMajor) {

    if (Uplo == CblasUpper)         uplo  = 0;

    if (Uplo == CblasLower)         uplo  = 1;

    info = -1;

    if (incy == 0)          info = 11;

    if (incx == 0)          info =  8;

    if (lda  < k + 1)       info =  6;

    if (k < 0)              info =  3;

    if (n < 0)              info =  2;

    if (uplo  < 0)          info =  1;

  }

  if (order == CblasRowMajor) {

    if (Uplo == CblasUpper)         uplo  = 1;

    if (Uplo == CblasLower)         uplo  = 0;

    info = -1;

    if (incy == 0)          info = 11;

    if (incx == 0)          info =  8;

    if (lda  < k + 1)       info =  6;

    if (k < 0)              info =  3;

    if (n < 0)              info =  2;

    if (uplo  < 0)          info =  1;

  }

  if (info >= 0) {

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

    return;

  }

#endif

  if (n == 0) return;

  if (beta != ONE) SCAL_K(n, 0, 0, beta, y, abs(incy), NULL, 0, NULL, 0);

  if (alpha == 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

  (sbmv[uplo])(n, k, alpha, a, lda, x, incx, y, incy, buffer);

#ifdef SMP

  } else {

    (sbmv_thread[uplo])(n, k, alpha, a, lda, x, incx, y, incy, buffer, nthreads);

  }

#endif

  blas_memory_free(buffer);

  FUNCTION_PROFILE_END(1, n * k / 2 + n, n * k);

  IDEBUG_END;

  return;

}