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

/* 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 <stdlib.h></stdlib.h>

#include "common.h"

#ifndef TRANSA

#if   !defined(CONJ) && !defined(XCONJ)

#define GEMV	GEMV_N

#elif  defined(CONJ) && !defined(XCONJ)

#define GEMV	GEMV_R

#elif !defined(CONJ) &&  defined(XCONJ)

#define GEMV	GEMV_O

#else

#define GEMV	GEMV_S

#endif

#else

#if   !defined(CONJ) && !defined(XCONJ)

#define GEMV	GEMV_T

#elif  defined(CONJ) && !defined(XCONJ)

#define GEMV	GEMV_C

#elif !defined(CONJ) &&  defined(XCONJ)

#define GEMV	GEMV_U

#else

#define GEMV	GEMV_D

#endif

#endif

static int gemv_kernel(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *dummy1, FLOAT *buffer, BLASLONG pos){

  FLOAT *a, *x, *y;

  BLASLONG lda, incx, incy;

  BLASLONG m_from, m_to, n_from, n_to;

  a = (FLOAT *)args -> a;

  x = (FLOAT *)args -> b;

  y = (FLOAT *)args -> c;

  lda  = args -> lda;

  incx = args -> ldb;

  incy = args -> ldc;

  m_from = 0;

  m_to   = args -> m;

  if (range_m) {

    m_from = *(range_m + 0);

    m_to   = *(range_m + 1);

    a += m_from        * COMPSIZE;

#ifndef TRANSA

    y += m_from * incy * COMPSIZE;

#endif

  }

  n_from = 0;

  n_to   = args -> n;

  if (range_n) {

    n_from = *(range_n + 0);

    n_to   = *(range_n + 1);

    a += n_from * lda  * COMPSIZE;

#ifdef TRANSA

    y += n_from * incy * COMPSIZE;

#endif

  }

  //  fprintf(stderr, "M_From = %d  M_To = %d  N_From = %d  N_To = %d\n", m_from, m_to, n_from, n_to);

  GEMV(m_to - m_from, n_to - n_from, 0,

       *((FLOAT *)args -> alpha + 0),

#ifdef COMPLEX

       *((FLOAT *)args -> alpha + 1),

#endif

       a, lda, x, incx, y, incy, buffer);

  return 0;

}

#ifndef COMPLEX

int CNAME(BLASLONG m, BLASLONG n, FLOAT  alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG incx, FLOAT *y, BLASLONG incy, FLOAT *buffer, int nthreads){

#else

int CNAME(BLASLONG m, BLASLONG n, FLOAT *alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG incx, FLOAT *y, BLASLONG incy, FLOAT *buffer, int nthreads){

#endif

  blas_arg_t args;

  blas_queue_t queue[MAX_CPU_NUMBER];

  BLASLONG range[MAX_CPU_NUMBER + 1];

  BLASLONG width, i, num_cpu;

#ifdef SMP

#ifndef COMPLEX

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_REAL;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_REAL;

#else

  int mode  =  BLAS_SINGLE  | BLAS_REAL;

#endif  

#else

#ifdef XDOUBLE

  int mode  =  BLAS_XDOUBLE | BLAS_COMPLEX;

#elif defined(DOUBLE)

  int mode  =  BLAS_DOUBLE  | BLAS_COMPLEX;

#else

  int mode  =  BLAS_SINGLE  | BLAS_COMPLEX;

#endif  

#endif

#endif

  args.m = m;

  args.n = n;

  args.a = (void *)a;

  args.b = (void *)x;

  args.c = (void *)y;

  args.lda = lda;

  args.ldb = incx;

  args.ldc = incy;

#ifndef COMPLEX

  args.alpha = (void *)α

#else

  args.alpha = (void *) alpha;

#endif

  num_cpu  = 0;

  range[0] = 0;

#ifndef TRANSA

  i        = m;

#else

  i        = n;

#endif

  while (i > 0){

    width  = blas_quickdivide(i + nthreads - num_cpu - 1, nthreads - num_cpu);

    if (width < 4) width = 4;

    if (i < width) width = i;

    range[num_cpu + 1] = range[num_cpu] + width;

    queue[num_cpu].mode    = mode;

    queue[num_cpu].routine = gemv_kernel;

    queue[num_cpu].args    = &args;

#ifndef TRANSA

    queue[num_cpu].range_m = &range[num_cpu];

    queue[num_cpu].range_n = NULL;

#else

    queue[num_cpu].range_m = NULL;

    queue[num_cpu].range_n = &range[num_cpu];

#endif

    queue[num_cpu].sa      = NULL;

    queue[num_cpu].sb      = NULL;

    queue[num_cpu].next    = &queue[num_cpu + 1];

    num_cpu ++;

    i -= width;

  }

  if (num_cpu) {

    queue[0].sa = NULL;

    queue[0].sb = buffer;

    queue[num_cpu - 1].next = NULL;

    exec_blas(num_cpu, queue);

  }

  return 0;

}