/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/* Redistribution and use in source and binary forms, with or        */
/* without modification, are permitted provided that the following   */
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/*      provided with the distribution.                              */
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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, BLASLONG offset, FLOAT *b){

  BLASLONG i, ii, j, jj, k;

  FLOAT *a1, *a2,  *a3,  *a4,  *a5,  *a6,  *a7,  *a8;
  FLOAT data1, data2;

  lda *= 2;
  jj = offset;

  j = (n >> 3);
  while (j > 0){

    a1  = a +  0 * lda;
    a2  = a +  1 * lda;
    a3  = a +  2 * lda;
    a4  = a +  3 * lda;
    a5  = a +  4 * lda;
    a6  = a +  5 * lda;
    a7  = a +  6 * lda;
    a8  = a +  7 * lda;

    a += 8 * lda;
    ii = 0;

    for (i = 0; i < m; i++) {

      if ((ii >= jj ) && (ii - jj < 8)) {
	for (k = 0; k < ii - jj; k ++) {
	  *(b +  k * 2 + 0) = *(a1 +  k * lda + 0);
	  *(b +  k * 2 + 1) = *(a1 +  k * lda + 1);
	}
	data1 = *(a1 + (ii - jj) * lda + 0);
	data2 = *(a1 + (ii - jj) * lda + 1);

	compinv(b +  (ii - jj) * 2, data1, data2);
      }

      if (ii - jj >= 8) {
	*(b +  0) = *(a1  +  0);
	*(b +  1) = *(a1  +  1);
	*(b +  2) = *(a2  +  0);
	*(b +  3) = *(a2  +  1);
	*(b +  4) = *(a3  +  0);
	*(b +  5) = *(a3  +  1);
	*(b +  6) = *(a4  +  0);
	*(b +  7) = *(a4  +  1);
	*(b +  8) = *(a5  +  0);
	*(b +  9) = *(a5  +  1);
	*(b + 10) = *(a6  +  0);
	*(b + 11) = *(a6  +  1);
	*(b + 12) = *(a7  +  0);
	*(b + 13) = *(a7  +  1);
	*(b + 14) = *(a8  +  0);
	*(b + 15) = *(a8  +  1);
      }

      a1  += 2;
      a2  += 2;
      a3  += 2;
      a4  += 2;
      a5  += 2;
      a6  += 2;
      a7  += 2;
      a8  += 2;
      b  += 16;
      ii ++;
    }

    jj += 8;
    j --;
  }

  if (n & 4) {

    a1  = a +  0 * lda;
    a2  = a +  1 * lda;
    a3  = a +  2 * lda;
    a4  = a +  3 * lda;
    a += 4 * lda;
    ii = 0;

    for (i = 0; i < m; i++) {

      if ((ii >= jj ) && (ii - jj < 4)) {
	for (k = 0; k < ii - jj; k ++) {
	  *(b +  k * 2 + 0) = *(a1 +  k * lda + 0);
	  *(b +  k * 2 + 1) = *(a1 +  k * lda + 1);
	}
	data1 = *(a1 + (ii - jj) * lda + 0);
	data2 = *(a1 + (ii - jj) * lda + 1);

	compinv(b +  (ii - jj) * 2, data1, data2);
      }

      if (ii - jj >= 4) {
	*(b +  0) = *(a1  +  0);
	*(b +  1) = *(a1  +  1);
	*(b +  2) = *(a2  +  0);
	*(b +  3) = *(a2  +  1);
	*(b +  4) = *(a3  +  0);
	*(b +  5) = *(a3  +  1);
	*(b +  6) = *(a4  +  0);
	*(b +  7) = *(a4  +  1);
      }

      a1  += 2;
      a2  += 2;
      a3  += 2;
      a4  += 2;
      b  += 8;
      ii ++;
    }

    jj += 4;
  }

  if (n & 2) {

    a1  = a +  0 * lda;
    a2  = a +  1 * lda;
    a += 2 * lda;
    ii = 0;

    for (i = 0; i < m; i++) {

      if ((ii >= jj ) && (ii - jj < 2)) {
	for (k = 0; k < ii - jj; k ++) {
	  *(b +  k * 2 + 0) = *(a1 +  k * lda + 0);
	  *(b +  k * 2 + 1) = *(a1 +  k * lda + 1);
	}
	data1 = *(a1 + (ii - jj) * lda + 0);
	data2 = *(a1 + (ii - jj) * lda + 1);

	compinv(b +  (ii - jj) * 2, data1, data2);
      }

      if (ii - jj >= 2) {
	*(b +  0) = *(a1  +  0);
	*(b +  1) = *(a1  +  1);
	*(b +  2) = *(a2  +  0);
	*(b +  3) = *(a2  +  1);
      }

      a1  += 2;
      a2  += 2;
      b  += 4;
      ii ++;
    }

    jj += 2;
  }

  if (n & 1) {

    a1  = a +  0 * lda;
    ii = 0;

    for (i = 0; i < m; i++) {

      if ((ii >= jj ) && (ii - jj < 1)) {
	for (k = 0; k < ii - jj; k ++) {
	  *(b +  k * 2 + 0) = *(a1 +  k * lda + 0);
	  *(b +  k * 2 + 1) = *(a1 +  k * lda + 1);
	}
	data1 = *(a1 + (ii - jj) * lda + 0);
	data2 = *(a1 + (ii - jj) * lda + 1);

	compinv(b +  (ii - jj) * 2, data1, data2);
      }

      if (ii - jj >= 1) {
	*(b +  0) = *(a1  +  0);
	*(b +  1) = *(a1  +  1);
      }

      a1  += 2;
      b  += 2;
      ii ++;
    }
  }

  return 0;
}
