OpenBLAS/driver/level3/gemm_thread_mn.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/*********************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include "common.h"

static const int divide_rule[][2] =
  {{ 0,  0},
   { 1,  1}, { 1,  2}, { 1,  3}, { 2,  2},
   { 1,  5}, { 2,  3}, { 1,  7}, { 2,  4},
   { 3,  3}, { 2,  5}, { 1, 11}, { 2,  6},
   { 1, 13}, { 2,  7}, { 3,  5}, { 4,  4},
   { 1, 17}, { 3,  6}, { 1, 19}, { 4,  5},
   { 3,  7}, { 2, 11}, { 1, 23}, { 4,  6},
   { 5,  5}, { 2, 13}, { 3,  9}, { 4,  7},
   { 1, 29}, { 5,  6}, { 1, 31}, { 4,  8},
   { 3, 11}, { 2, 17}, { 5,  7}, { 6,  6},
   { 1, 37}, { 2, 19}, { 3, 13}, { 5,  8},
   { 1, 41}, { 6,  7}, { 1, 43}, { 4, 11},
   { 5,  9}, { 2, 23}, { 1, 47}, { 6,  8},
   { 7,  7}, { 5, 10}, { 3, 17}, { 4, 13},
   { 1, 53}, { 6,  9}, { 5, 11}, { 7,  8},
   { 3, 19}, { 2, 29}, { 1, 59}, { 6, 10},
   { 1, 61}, { 2, 31}, { 7,  9}, { 8,  8},
};

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

  blas_queue_t queue[MAX_CPU_NUMBER];

  BLASLONG range_M[MAX_CPU_NUMBER + 1], range_N[MAX_CPU_NUMBER + 1];
  BLASLONG procs, num_cpu_m, num_cpu_n;

  BLASLONG width, i, j;
  BLASLONG divM, divN;

  divM = divide_rule[nthreads][0];
  divN = divide_rule[nthreads][1];

  if (!range_m) {
    range_M[0] = 0;
    i          = arg -> m;
  } else {
    range_M[0] = range_m[0];
    i          = range_m[1] - range_m[0];
  }

  num_cpu_m  = 0;

  while (i > 0){

    width  = blas_quickdivide(i + divM - num_cpu_m - 1, divM - num_cpu_m);

    i -= width;
    if (i < 0) width = width + i;

    range_M[num_cpu_m + 1] = range_M[num_cpu_m] + width;

    num_cpu_m ++;
  }

  if (!range_n) {
    range_N[0] = 0;
    i          = arg -> n;
  } else {
    range_N[0] = range_n[0];
    i          = range_n[1] - range_n[0];
  }

  num_cpu_n  = 0;

  while (i > 0){

    width  = blas_quickdivide(i + divN - num_cpu_n - 1, divN - num_cpu_n);

    i -= width;
    if (i < 0) width = width + i;

    range_N[num_cpu_n + 1] = range_N[num_cpu_n] + width;

    num_cpu_n ++;
  }

  procs = 0;

  for (j = 0; j < num_cpu_n; j++) {
    for (i = 0; i < num_cpu_m; i++) {

    queue[procs].mode    = mode;
    queue[procs].routine = function;
    queue[procs].args    = arg;
    queue[procs].range_m = &range_M[i];
    queue[procs].range_n = &range_N[j];
    queue[procs].sa      = NULL;
    queue[procs].sb      = NULL;
    queue[procs].next    = &queue[procs + 1];

    procs ++;
    }
  }

  if (procs) {
    queue[0].sa = sa;
    queue[0].sb = sb;

    queue[procs - 1].next = NULL;

    exec_blas(procs, queue);
  }

  return 0;
}