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

/* 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   */

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/*      copyright notice, this list of conditions and the following  */

/*      disclaimer.                                                  */

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/*   2. Redistributions in binary form must reproduce the above      */

/*      copyright notice, this list of conditions and the following  */

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/*      provided with the distribution.                              */

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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */

/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */

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/* interpreted as representing official policies, either expressed   */

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

#include <stdio.h></stdio.h>

#include <stdlib.h></stdlib.h>

#include <math.h></math.h>

#include "common.h"

int CNAME(int mode, blas_arg_t *arg, BLASLONG *range_m, BLASLONG *range_n, int (*function)(), void *sa, void *sb, BLASLONG nthreads) {

  blas_queue_t queue[MAX_CPU_NUMBER];

  BLASLONG range[MAX_CPU_NUMBER + 1];

  BLASLONG width, i;

  BLASLONG n_from, n_to;

  double dnum, nf, nt, di;

  int num_cpu;

  int mask = 0;

  if (!(mode & BLAS_COMPLEX)) {

    switch (mode & BLAS_PREC) {

    case BLAS_SINGLE:

      mask = MAX(SGEMM_UNROLL_M, SGEMM_UNROLL_N) - 1;

      break;

    case BLAS_DOUBLE:

      mask = MAX(DGEMM_UNROLL_M, DGEMM_UNROLL_N) - 1;

      break;

#ifdef EXPRECISION

    case BLAS_XDOUBLE:

      mask = MAX(QGEMM_UNROLL_M, QGEMM_UNROLL_N) - 1;

      break;

#endif

    }

  } else {

    switch (mode & BLAS_PREC) {

    case BLAS_SINGLE:

      mask = MAX(CGEMM_UNROLL_M, CGEMM_UNROLL_N) - 1;

      break;

    case BLAS_DOUBLE:

      mask = MAX(ZGEMM_UNROLL_M, ZGEMM_UNROLL_N) - 1;

      break;

#ifdef EXPRECISION

    case BLAS_XDOUBLE:

      mask = MAX(XGEMM_UNROLL_M, XGEMM_UNROLL_N) - 1;

      break;

#endif

    }

  }

  n_from = 0;

  n_to   = arg -> n;

  if (range_n) {

    n_from = *(range_n + 0);

    n_to   = *(range_n + 1);

  }

  if (!(mode & BLAS_UPLO)) {

    nf = (double)(n_from);

    nt = (double)(n_to);

    dnum = (nt * nt - nf * nf) / (double)nthreads;

    num_cpu  = 0;

    range[0] = n_from;

    i        = n_from;

    while (i < n_to){

      if (nthreads - num_cpu > 1) {

	di = (double)i;

	width = ((BLASLONG)( sqrt(di * di + dnum) - di) + mask) & ~mask;

	if ((width <= 0) || (width > n_to - i)) width = n_to - i;

      } else {

	width = n_to - i;

      }

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

      queue[num_cpu].mode    = mode;

      queue[num_cpu].routine = function;

      queue[num_cpu].args    = arg;

      queue[num_cpu].range_m = range_m;

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

      queue[num_cpu].sa      = NULL;

      queue[num_cpu].sb      = NULL;

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

      num_cpu ++;

      i += width;

    }

  } else {

    nf = (double)(arg -> n - n_from);

    nt = (double)(arg -> n - n_to);

    dnum = (nt * nt - nf * nf) / (double)nthreads;

    num_cpu  = 0;

    range[0] = n_from;

    i        = n_from;

    while (i < n_to){

      if (nthreads - num_cpu > 1) {

	di = (double)(arg -> n - i);

	width = ((BLASLONG)(-sqrt(di * di + dnum) + di) + mask) & ~mask;

	if ((width <= 0) || (width > n_to - i)) width = n_to - i;

      } else {

	width = n_to - i;

      }

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

      queue[num_cpu].mode    = mode;

      queue[num_cpu].routine = function;

      queue[num_cpu].args    = arg;

      queue[num_cpu].range_m = range_m;

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

      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 = sa;

    queue[0].sb = sb;

    queue[num_cpu - 1].next = NULL;

    exec_blas(num_cpu, queue);

  }

  return 0;

}