text: /*********************************************************************/
  /* 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>
  #include "common.h"
  
  #define a2	(a1 + 2)
  #define a4	(a3 + 2)
  #define a6	(a5 + 2)
  #define a8	(a7 + 2)
  
  int CNAME(BLASLONG n, BLASLONG k1, BLASLONG k2, FLOAT *a, BLASLONG lda, blasint *ipiv, FLOAT *buffer){
  
    BLASLONG i, j, ip1, ip2;
    blasint *piv;
    FLOAT *a1, *a3, *a5, *a7;
    FLOAT *b1, *b2, *b3, *b4;
    FLOAT *b5, *b6, *b7, *b8;
    FLOAT A1, A2, A3, A4, A5, A6, A7, A8;
    FLOAT B1, B2, B3, B4, B5, B6, B7, B8;
  
    FLOAT A9, A10, A11, A12, A13, A14, A15, A16;
    FLOAT B9, B10, B11, B12, B13, B14, B15, B16;
  
    a -= 2;
    lda *= 2;
    k1 --;
  
   ipiv += k1;
  
    if (n  <= 0) return 0;
  
    j = (n >> 2);
    if (j > 0) {
      do {
        piv = ipiv;
  
        a1 = a + (k1 + 1) * 2;
  
        a3 = a1 + 1 * lda;
        a5 = a1 + 2 * lda;
        a7 = a1 + 3 * lda;
  
        ip1 = *(piv + 0) * 2;
        ip2 = *(piv + 1) * 2;
        piv += 2;
  
        b1 = a + ip1;
        b2 = a + ip2;
  
        b3 = b1 + 1 * lda;
        b4 = b2 + 1 * lda;
        b5 = b1 + 2 * lda;
        b6 = b2 + 2 * lda;
        b7 = b1 + 3 * lda;
        b8 = b2 + 3 * lda;
  
        i = ((k2 - k1) >> 1);
  
        if (i > 0) {
  	do {
  	  A1  = *(a1 + 0);
  	  A9  = *(a1 + 1);
  	  A2  = *(a2 + 0);
  	  A10 = *(a2 + 1);
  	  A3  = *(a3 + 0);
  	  A11 = *(a3 + 1);
  	  A4  = *(a4 + 0);
  	  A12 = *(a4 + 1);
  	  A5  = *(a5 + 0);
  	  A13 = *(a5 + 1);
  	  A6  = *(a6 + 0);
  	  A14 = *(a6 + 1);
  	  A7  = *(a7 + 0);
  	  A15 = *(a7 + 1);
  	  A8  = *(a8 + 0);
  	  A16 = *(a8 + 1);
  
  	  B1  = *(b1 + 0);
  	  B9  = *(b1 + 1);
  	  B2  = *(b2 + 0);
  	  B10 = *(b2 + 1);
  	  B3  = *(b3 + 0);
  	  B11 = *(b3 + 1);
  	  B4  = *(b4 + 0);
  	  B12 = *(b4 + 1);
  	  B5  = *(b5 + 0);
  	  B13 = *(b5 + 1);
  	  B6  = *(b6 + 0);
  	  B14 = *(b6 + 1);
  	  B7  = *(b7 + 0);
  	  B15 = *(b7 + 1);
  	  B8  = *(b8 + 0);
  	  B16 = *(b8 + 1);
  
  	  ip1 = *(piv + 0) * 2;
  	  ip2 = *(piv + 1) * 2;
  	  piv += 2;
  
  	if (b1 == a1) {
  	    if (b2 == a2) {
  	      *(buffer +  0) = A1;
  	      *(buffer +  1) = A9;
  	      *(buffer +  2) = A3;
  	      *(buffer +  3) = A11;
  	      *(buffer +  4) = A5;
  	      *(buffer +  5) = A13;
  	      *(buffer +  6) = A7;
  	      *(buffer +  7) = A15;
  
  	      *(buffer +  8) = A2;
  	      *(buffer +  9) = A10;
  	      *(buffer + 10) = A4;
  	      *(buffer + 11) = A12;
  	      *(buffer + 12) = A6;
  	      *(buffer + 13) = A14;
  	      *(buffer + 14) = A8;
  	      *(buffer + 15) = A16;
  	    } else {
  	      *(buffer +  0) = A1;
  	      *(buffer +  1) = A9;
  	      *(buffer +  2) = A3;
  	      *(buffer +  3) = A11;
  	      *(buffer +  4) = A5;
  	      *(buffer +  5) = A13;
  	      *(buffer +  6) = A7;
  	      *(buffer +  7) = A15;
  
  	      *(buffer +  8) = B2;
  	      *(buffer +  9) = B10;
  	      *(buffer + 10) = B4;
  	      *(buffer + 11) = B12;
  	      *(buffer + 12) = B6;
  	      *(buffer + 13) = B14;
  	      *(buffer + 14) = B8;
  	      *(buffer + 15) = B16;
  
  	      *(b2 + 0) = A2;
  	      *(b2 + 1) = A10;
  	      *(b4 + 0) = A4;
  	      *(b4 + 1) = A12;
  	      *(b6 + 0) = A6;
  	      *(b6 + 1) = A14;
  	      *(b8 + 0) = A8;
  	      *(b8 + 1) = A16;
  	    }
  	} else
  	  if (b1 == a2) {
  	      if (b2 == a2) {
  		*(buffer +  0) = A2;
  		*(buffer +  1) = A10;
  		*(buffer +  2) = A4;
  		*(buffer +  3) = A12;
  		*(buffer +  4) = A6;
  		*(buffer +  5) = A14;
  		*(buffer +  6) = A8;
  		*(buffer +  7) = A16;
  		*(buffer +  8) = A1;
  		*(buffer +  9) = A9;
  		*(buffer + 10) = A3;
  		*(buffer + 11) = A11;
  		*(buffer + 12) = A5;
  		*(buffer + 13) = A13;
  		*(buffer + 14) = A7;
  		*(buffer + 15) = A15;
  
  	      } else {
  		*(buffer +  0) = A2;
  		*(buffer +  1) = A10;
  		*(buffer +  2) = A4;
  		*(buffer +  3) = A12;
  		*(buffer +  4) = A6;
  		*(buffer +  5) = A14;
  		*(buffer +  6) = A8;
  		*(buffer +  7) = A16;
  		*(buffer +  8) = B2;
  		*(buffer +  9) = B10;
  		*(buffer + 10) = B4;
  		*(buffer + 11) = B12;
  		*(buffer + 12) = B6;
  		*(buffer + 13) = B14;
  		*(buffer + 14) = B8;
  		*(buffer + 15) = B16;
  
  		*(b2 + 0) = A1;
  		*(b2 + 1) = A9;
  		*(b4 + 0) = A3;
  		*(b4 + 1) = A11;
  		*(b6 + 0) = A5;
  		*(b6 + 1) = A13;
  		*(b8 + 0) = A7;
  		*(b8 + 1) = A15;
  	      }
  	  } else {
  	      if (b2 == a2) {
  		*(buffer +  0) = B1;
  		*(buffer +  1) = B9;
  		*(buffer +  2) = B3;
  		*(buffer +  3) = B11;
  		*(buffer +  4) = B5;
  		*(buffer +  5) = B13;
  		*(buffer +  6) = B7;
  		*(buffer +  7) = B15;
  		*(buffer +  8) = A2;
  		*(buffer +  9) = A10;
  		*(buffer + 10) = A4;
  		*(buffer + 11) = A12;
  		*(buffer + 12) = A6;
  		*(buffer + 13) = A14;
  		*(buffer + 14) = A8;
  		*(buffer + 15) = A16;
  
  		*(b1 + 0) = A1;
  		*(b1 + 1) = A9;
  		*(b3 + 0) = A3;
  		*(b3 + 1) = A11;
  		*(b5 + 0) = A5;
  		*(b5 + 1) = A13;
  		*(b7 + 0) = A7;
  		*(b7 + 1) = A15;
  	      } else
  		if (b2 == b1) {
  		  *(buffer +  0) = B1;
  		  *(buffer +  1) = B9;
  		  *(buffer +  2) = B3;
  		  *(buffer +  3) = B11;
  		  *(buffer +  4) = B5;
  		  *(buffer +  5) = B13;
  		  *(buffer +  6) = B7;
  		  *(buffer +  7) = B15;
  		  *(buffer +  8) = A1;
  		  *(buffer +  9) = A9;
  		  *(buffer + 10) = A3;
  		  *(buffer + 11) = A11;
  		  *(buffer + 12) = A5;
  		  *(buffer + 13) = A13;
  		  *(buffer + 14) = A7;
  		  *(buffer + 15) = A15;
  
  		  *(b1 + 0) = A2;
  		  *(b1 + 1) = A10;
  		  *(b3 + 0) = A4;
  		  *(b3 + 1) = A12;
  		  *(b5 + 0) = A6;
  		  *(b5 + 1) = A14;
  		  *(b7 + 0) = A8;
  		  *(b7 + 1) = A16;
  		} else {
  		  *(buffer +  0) = B1;
  		  *(buffer +  1) = B9;
  		  *(buffer +  2) = B3;
  		  *(buffer +  3) = B11;
  		  *(buffer +  4) = B5;
  		  *(buffer +  5) = B13;
  		  *(buffer +  6) = B7;
  		  *(buffer +  7) = B15;
  		  *(buffer +  8) = B2;
  		  *(buffer +  9) = B10;
  		  *(buffer + 10) = B4;
  		  *(buffer + 11) = B12;
  		  *(buffer + 12) = B6;
  		  *(buffer + 13) = B14;
  		  *(buffer + 14) = B8;
  		  *(buffer + 15) = B16;
  
  		  *(b1 + 0) = A1;
  		  *(b1 + 1) = A9;
  		  *(b2 + 0) = A2;
  		  *(b2 + 1) = A10;
  		  *(b3 + 0) = A3;
  		  *(b3 + 1) = A11;
  		  *(b4 + 0) = A4;
  		  *(b4 + 1) = A12;
  		  *(b5 + 0) = A5;
  		  *(b5 + 1) = A13;
  		  *(b6 + 0) = A6;
  		  *(b6 + 1) = A14;
  		  *(b7 + 0) = A7;
  		  *(b7 + 1) = A15;
  		  *(b8 + 0) = A8;
  		  *(b8 + 1) = A16;
  		}
  	  }
  
  	 buffer += 16;
  
  	  b1 = a + ip1;
  	  b2 = a + ip2;
  
  	  b3 = b1 + 1 * lda;
  	  b4 = b2 + 1 * lda;
  	  b5 = b1 + 2 * lda;
  	  b6 = b2 + 2 * lda;
  	  b7 = b1 + 3 * lda;
  	  b8 = b2 + 3 * lda;
  
  	  a1 += 4;
  	  a3 += 4;
  	  a5 += 4;
  	  a7 += 4;
  
  	i --;
  	} while (i > 0);
        }
  
        i = ((k2 - k1) & 1);
  
        if (i > 0) {
  	A1  = *(a1 + 0);
  	A9  = *(a1 + 1);
  	B1  = *(b1 + 0);
  	B9  = *(b1 + 1);
  	A3  = *(a3 + 0);
  	A11 = *(a3 + 1);
  	B3  = *(b3 + 0);
  	B11 = *(b3 + 1);
  	A5  = *(a5 + 0);
  	A13 = *(a5 + 1);
  	B5  = *(b5 + 0);
  	B13 = *(b5 + 1);
  	A7  = *(a7 + 0);
  	A15 = *(a7 + 1);
  	B7  = *(b7 + 0);
  	B15 = *(b7 + 1);
  
  	if (a1 == b1) {
  	  *(buffer + 0) = A1;
  	  *(buffer + 1) = A9;
  	  *(buffer + 2) = A3;
  	  *(buffer + 3) = A11;
  	  *(buffer + 4) = A5;
  	  *(buffer + 5) = A13;
  	  *(buffer + 6) = A7;
  	  *(buffer + 7) = A15;
  	} else {
  	  *(buffer + 0) = B1;
  	  *(buffer + 1) = B9;
  	  *(buffer + 2) = B3;
  	  *(buffer + 3) = B11;
  	  *(buffer + 4) = B5;
  	  *(buffer + 5) = B13;
  	  *(buffer + 6) = B7;
  	  *(buffer + 7) = B15;
  
  	  *(b1 + 0) = A1;
  	  *(b1 + 1) = A9;
  	  *(b3 + 0) = A3;
  	  *(b3 + 1) = A11;
  	  *(b5 + 0) = A5;
  	  *(b5 + 1) = A13;
  	  *(b7 + 0) = A7;
  	  *(b7 + 1) = A15;
  	}
  	buffer += 8;
        }
  
        a += 4 * lda;
  
        j --;
      } while (j > 0);
    }
  
    if (n & 2) {
      piv = ipiv;
  
      a1 = a + (k1 + 1) * 2;
      a3 = a1 + lda;
  
      ip1 = *(piv + 0) * 2;
      ip2 = *(piv + 1) * 2;
      piv += 2;
  
      b1 = a + ip1;
      b2 = a + ip2;
  
      b3 = b1 + lda;
      b4 = b2 + lda;
  
      i = ((k2 - k1) >> 1);
  
      if (i > 0) {
        do {
  	A1 = *(a1 + 0);
  	A2 = *(a1 + 1);
  	A3 = *(a2 + 0);
  	A4 = *(a2 + 1);
  	A5 = *(a3 + 0);
  	A6 = *(a3 + 1);
  	A7 = *(a4 + 0);
  	A8 = *(a4 + 1);
  
  	B1 = *(b1 + 0);
  	B2 = *(b1 + 1);
  	B3 = *(b2 + 0);
  	B4 = *(b2 + 1);
  	B5 = *(b3 + 0);
  	B6 = *(b3 + 1);
  	B7 = *(b4 + 0);
  	B8 = *(b4 + 1);
  
  	ip1 = *(piv + 0) * 2;
  	ip2 = *(piv + 1) * 2;
  	piv += 2;
  
  	if (b1 == a1) {
  	  if (b2 == a2) {
  	    *(buffer + 0) = A1;
  	    *(buffer + 1) = A2;
  	    *(buffer + 2) = A5;
  	    *(buffer + 3) = A6;
  	    *(buffer + 4) = A3;
  	    *(buffer + 5) = A4;
  	    *(buffer + 6) = A7;
  	    *(buffer + 7) = A8;
  	  } else {
  	    *(buffer + 0) = A1;
  	    *(buffer + 1) = A2;
  	    *(buffer + 2) = A5;
  	    *(buffer + 3) = A6;
  	    *(buffer + 4) = B3;
  	    *(buffer + 5) = B4;
  	    *(buffer + 6) = B7;
  	    *(buffer + 7) = B8;
  
  	    *(b2 + 0) = A3;
  	    *(b2 + 1) = A4;
  	    *(b4 + 0) = A7;
  	    *(b4 + 1) = A8;
  	  }
  	} else
  	  if (b1 == a2) {
  	    if (b2 == a2) {
  	      *(buffer + 0) = A3;
  	      *(buffer + 1) = A4;
  	      *(buffer + 2) = A7;
  	      *(buffer + 3) = A8;
  	      *(buffer + 4) = A1;
  	      *(buffer + 5) = A2;
  	      *(buffer + 6) = A5;
  	      *(buffer + 7) = A6;
  	    } else {
  	      *(buffer + 0) = A3;
  	      *(buffer + 1) = A4;
  	      *(buffer + 2) = A7;
  	      *(buffer + 3) = A8;
  	      *(buffer + 4) = B3;
  	      *(buffer + 5) = B4;
  	      *(buffer + 6) = B7;
  	      *(buffer + 7) = B8;
  
  	      *(b2 + 0) = A1;
  	      *(b2 + 1) = A2;
  	      *(b4 + 0) = A5;
  	      *(b4 + 1) = A6;
  	    }
  	  } else {
  	    if (b2 == a2) {
  	      *(buffer + 0) = B1;
  	      *(buffer + 1) = B2;
  	      *(buffer + 2) = B5;
  	      *(buffer + 3) = B6;
  	      *(buffer + 4) = A3;
  	      *(buffer + 5) = A4;
  	      *(buffer + 6) = A7;
  	      *(buffer + 7) = A8;
  
  	      *(b1 + 0) = A1;
  	      *(b1 + 1) = A2;
  	      *(b3 + 0) = A5;
  	      *(b3 + 1) = A6;
  	    } else
  	      if (b2 == b1) {
  		*(buffer + 0) = B1;
  		*(buffer + 1) = B2;
  		*(buffer + 2) = B5;
  		*(buffer + 3) = B6;
  		*(buffer + 4) = A1;
  		*(buffer + 5) = A2;
  		*(buffer + 6) = A5;
  		*(buffer + 7) = A6;
  
  		*(b1 + 0) = A3;
  		*(b1 + 1) = A4;
  		*(b3 + 0) = A7;
  		*(b3 + 1) = A8;
  	      } else {
  		*(buffer + 0) = B1;
  		*(buffer + 1) = B2;
  		*(buffer + 2) = B5;
  		*(buffer + 3) = B6;
  		*(buffer + 4) = B3;
  		*(buffer + 5) = B4;
  		*(buffer + 6) = B7;
  		*(buffer + 7) = B8;
  		*(b1 + 0) = A1;
  		*(b1 + 1) = A2;
  		*(b2 + 0) = A3;
  		*(b2 + 1) = A4;
  		*(b3 + 0) = A5;
  		*(b3 + 1) = A6;
  		*(b4 + 0) = A7;
  		*(b4 + 1) = A8;
  	      }
  	  }
  
  	  buffer += 8;
  
  	  b1 = a + ip1;
  	  b2 = a + ip2;
  
  	  b3 = b1 + lda;
  	  b4 = b2 + lda;
  
  	  a1 += 4;
  	  a3 += 4;
  
  	  i --;
        } while (i > 0);
      }
  
      i = ((k2 - k1) & 1);
  
      if (i > 0) {
        A1 = *(a1 + 0);
        A2 = *(a1 + 1);
        B1 = *(b1 + 0);
        B2 = *(b1 + 1);
        A3 = *(a3 + 0);
        A4 = *(a3 + 1);
        B3 = *(b3 + 0);
        B4 = *(b3 + 1);
  
        if (a1 == b1) {
  	*(buffer + 0) = A1;
  	*(buffer + 1) = A2;
  	*(buffer + 2) = A3;
  	*(buffer + 3) = A4;
  
        } else {
  	*(buffer + 0) = B1;
  	*(buffer + 1) = B2;
  	*(buffer + 2) = B3;
  	*(buffer + 3) = B4;
  	*(b1 + 0) = A1;
  	*(b1 + 1) = A2;
  	*(b3 + 0) = A3;
  	*(b3 + 1) = A4;
        }
        buffer += 4;
      }
  
      a += 2 * lda;
    }
  
    if (n & 1) {
      piv = ipiv;
  
      a1 = a + (k1 + 1) * 2;
  
      ip1 = *(piv + 0) * 2;
      ip2 = *(piv + 1) * 2;
      piv += 2;
  
      b1 = a + ip1;
      b2 = a + ip2;
  
      i = ((k2 - k1) >> 1);
  
      if (i > 0) {
        do {
  	A1 = *(a1 + 0);
  	A2 = *(a1 + 1);
  	A3 = *(a2 + 0);
  	A4 = *(a2 + 1);
  	B1 = *(b1 + 0);
  	B2 = *(b1 + 1);
  	B3 = *(b2 + 0);
  	B4 = *(b2 + 1);
  
  	ip1 = *(piv + 0) * 2;
  	ip2 = *(piv + 1) * 2;
  	piv += 2;
  
  	if (b1 == a1) {
  	  if (b2 == a2) {
  	    *(buffer + 0) = A1;
  	    *(buffer + 1) = A2;
  	    *(buffer + 2) = A3;
  	    *(buffer + 3) = A4;
  	  } else {
  	    *(buffer + 0) = A1;
  	    *(buffer + 1) = A2;
  	    *(buffer + 2) = B3;
  	    *(buffer + 3) = B4;
  
  	    *(b2 + 0) = A3;
  	    *(b2 + 1) = A4;
  	  }
  	} else
  	  if (b1 == a2) {
  	    if (b2 == a2) {
  	      *(buffer + 0) = A3;
  	      *(buffer + 1) = A4;
  	      *(buffer + 2) = A1;
  	      *(buffer + 3) = A2;
  	    } else {
  	      *(buffer + 0) = A3;
  	      *(buffer + 1) = A4;
  	      *(buffer + 2) = B3;
  	      *(buffer + 3) = B4;
  	      *(b2 + 0) = A1;
  	      *(b2 + 1) = A2;
  	    }
  	  } else {
  	    if (b2 == a2) {
  	      *(buffer + 0) = B1;
  	      *(buffer + 1) = B2;
  	      *(buffer + 2) = A3;
  	      *(buffer + 3) = A4;
  	      *(b1 + 0) = A1;
  	      *(b1 + 1) = A2;
  	    } else
  	      if (b2 == b1) {
  		*(buffer + 0) = B1;
  		*(buffer + 1) = B2;
  		*(buffer + 2) = A1;
  		*(buffer + 3) = A2;
  		*(b1 + 0) = A3;
  		*(b1 + 1) = A4;
  	      } else {
  		*(buffer + 0) = B1;
  		*(buffer + 1) = B2;
  		*(buffer + 2) = B3;
  		*(buffer + 3) = B4;
  		*(b1 + 0) = A1;
  		*(b1 + 1) = A2;
  		*(b2 + 0) = A3;
  		*(b2 + 1) = A4;
  	      }
  	  }
  
  	buffer += 4;
  
  	b1 = a + ip1;
  	b2 = a + ip2;
  
  	a1 += 4;
  
  	i --;
        } while (i > 0);
      }
  
      i = ((k2 - k1) & 1);
  
      if (i > 0) {
        A1 = *(a1 + 0);
        A2 = *(a1 + 1);
        B1 = *(b1 + 0);
        B2 = *(b1 + 1);
  
        if (a1 == b1) {
  	*(buffer + 0) = A1;
  	*(buffer + 1) = A2;
        } else {
  	*(buffer + 0) = B1;
  	*(buffer + 1) = B2;
  	*(b1 + 0) = A1;
  	*(b1 + 1) = A2;
        }
        buffer += 2;
      }
    }
  
    return 0;
  }
  
  