OpenBLAS/kernel/generic/gemm_ncopy_2.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
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/*********************************************************************/

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

int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda, FLOAT *b){
  BLASLONG i, j;
  FLOAT *a_offset, *a_offset1, *a_offset2;
  FLOAT *b_offset;

  a_offset = a;
  b_offset = b;

  j = (n >> 1);

  if (j > 0){
    do {
      a_offset1 = a_offset;
      a_offset2 = a_offset + lda;
      a_offset += 2 * lda;

      i = (m >> 2);

      if (i > 0){
	do {
	  *(b_offset + 0) = *(a_offset1 + 0);
	  *(b_offset + 1) = *(a_offset2 + 0);
	  *(b_offset + 2) = *(a_offset1 + 1);
	  *(b_offset + 3) = *(a_offset2 + 1);
	  *(b_offset + 4) = *(a_offset1 + 2);
	  *(b_offset + 5) = *(a_offset2 + 2);
	  *(b_offset + 6) = *(a_offset1 + 3);
	  *(b_offset + 7) = *(a_offset2 + 3);
	  a_offset1 += 4;
	  a_offset2 += 4;
	  b_offset += 8;
	  i --;
	} while (i > 0);
      }

      i = (m & 3);

      if (i > 0){
	do {
	  *(b_offset + 0) = *(a_offset1 + 0);
	  *(b_offset + 1) = *(a_offset2 + 0);
	  a_offset1 ++;
	  a_offset2 ++;
	  b_offset += 2;
	  i --;
	} while (i > 0);
      }
      j --;
    } while (j > 0);
  }

  if (n & 1){

    i = (m >> 3);
    if (i > 0){
      do {
	*(b_offset + 0) = *(a_offset + 0);
	*(b_offset + 1) = *(a_offset + 1);
	*(b_offset + 2) = *(a_offset + 2);
	*(b_offset + 3) = *(a_offset + 3);
	*(b_offset + 4) = *(a_offset + 4);
	*(b_offset + 5) = *(a_offset + 5);
	*(b_offset + 6) = *(a_offset + 6);
	*(b_offset + 7) = *(a_offset + 7);
	a_offset += 8;
	b_offset += 8;
	i --;
      } while (i > 0);
    }

    i = (m & 7);

    if (i > 0){
      do {
	*(b_offset + 0) = *(a_offset + 0);
	a_offset ++;
	b_offset ++;
	i --;
      } while (i > 0);
    }
  }

  return 0;
}