Blame thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/lapack/laswp/generic/zlaswp_k_1.c

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/*********************************************************************/
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/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/* All rights reserved.                                              */
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/*                                                                   */
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/* Redistribution and use in source and binary forms, with or        */
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/* without modification, are permitted provided that the following   */
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/* conditions are met:                                               */
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/*                                                                   */
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/*   1. Redistributions of source code must retain the above         */
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/*      copyright notice, this list of conditions and the following  */
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/*      disclaimer.                                                  */
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/*                                                                   */
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/*   2. Redistributions in binary form must reproduce the above      */
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/*      copyright notice, this list of conditions and the following  */
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/*      disclaimer in the documentation and/or other materials       */
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/*      provided with the distribution.                              */
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/*                                                                   */
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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
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/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */
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/*    INCLUDING, BUT  NOT LIMITED  TO, THE IMPLIED  WARRANTIES OF    */
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/*    MERCHANTABILITY  AND FITNESS FOR  A PARTICULAR  PURPOSE ARE    */
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/*    DISCLAIMED.  IN  NO EVENT SHALL THE UNIVERSITY  OF TEXAS AT    */
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/*    AUSTIN OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,    */
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/*    INCIDENTAL,  SPECIAL, EXEMPLARY,  OR  CONSEQUENTIAL DAMAGES    */
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/*    (INCLUDING, BUT  NOT LIMITED TO,  PROCUREMENT OF SUBSTITUTE    */
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/*    GOODS  OR  SERVICES; LOSS  OF  USE,  DATA,  OR PROFITS;  OR    */
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/*    BUSINESS INTERRUPTION) HOWEVER CAUSED  AND ON ANY THEORY OF    */
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/*    LIABILITY, WHETHER  IN CONTRACT, STRICT  LIABILITY, OR TORT    */
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/*    (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY WAY OUT    */
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/*    OF  THE  USE OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE    */
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/*    POSSIBILITY OF SUCH DAMAGE.                                    */
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/*                                                                   */
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/* The views and conclusions contained in the software and           */
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/* documentation are those of the authors and should not be          */
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/* interpreted as representing official policies, either expressed   */
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/* or implied, of The University of Texas at Austin.                 */
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/*********************************************************************/
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#include <stdio.h></stdio.h>
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#include "common.h"
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#ifndef MINUS
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#define a2	(a1 + 2)
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#else
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#define a2	(a1 - 2)
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#endif
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int CNAME(BLASLONG n, BLASLONG k1, BLASLONG k2, FLOAT dummy1, FLOAT dummy4, 
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	  FLOAT *a, BLASLONG lda, 
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	  FLOAT *dummy2, BLASLONG dumy3, blasint *ipiv, BLASLONG incx){
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  BLASLONG i, j, ip1, ip2;
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  blasint *piv;
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  FLOAT *a1;
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  FLOAT *b1, *b2;
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  FLOAT A1, A2, B1, B2, A3, A4, B3, B4;
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  a   -= 2;
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  lda *= 2;
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  k1 --;
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#ifndef MINUS
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 ipiv += k1;
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#else
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  ipiv -= (k2 - 1) * incx;
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#endif
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  if (n  <= 0) return 0;
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  j = n;
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  if (j > 0) {
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    do {
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      piv = ipiv;
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#ifndef MINUS
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      a1 = a + (k1 + 1) * 2;
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#else
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      a1 = a + k2 * 2;
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#endif
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      ip1 = *piv * 2;
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      piv += incx;
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      ip2 = *piv * 2;
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      piv += incx;
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      b1 = a + ip1;
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      b2 = a + ip2;
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      i = ((k2 - k1) >> 1);
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      if (i > 0) {
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	do {
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#ifdef OPTERON
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#ifndef MINUS
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	  asm volatile("prefetchw  2 * 128(%0)\n"  : : "r"(a1));
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	  asm volatile("prefetchw  2 * 128(%0)\n"  : : "r"(b1));
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#else
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	  asm volatile("prefetchw -2 * 128(%0)\n"  : : "r"(a1));
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	  asm volatile("prefetchw -2 * 128(%0)\n"  : : "r"(b1));
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#endif
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#endif
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#ifdef CORE2
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#ifndef MINUS
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	  asm volatile("prefetcht1  2 * 128(%0)\n"  : : "r"(a1));
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	  asm volatile("prefetcht1  2 * 128(%0)\n"  : : "r"(b1));
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	  asm volatile("prefetcht1  2 * 128(%0)\n"  : : "r"(b2));
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#else
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	  asm volatile("prefetcht1 -2 * 128(%0)\n"  : : "r"(a1));
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	  asm volatile("prefetcht1 -2 * 128(%0)\n"  : : "r"(b1));
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	  asm volatile("prefetcht1 -2 * 128(%0)\n"  : : "r"(b2));
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#endif
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#endif
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	  A1 = *(a1 + 0);
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	  A2 = *(a1 + 1);
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	  A3 = *(a2 + 0);
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	  A4 = *(a2 + 1);
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	  B1 = *(b1 + 0);
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	  B2 = *(b1 + 1);
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	  B3 = *(b2 + 0);
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	  B4 = *(b2 + 1);
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	  ip1 = *piv * 2;
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	  piv += incx;
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	  ip2 = *piv * 2;
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	  piv += incx;
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	  if (b1 == a1) {
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	    if (b2 == a1) {
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	      *(a1 + 0) = A3;
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	      *(a1 + 1) = A4;
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	      *(a2 + 0) = A1;
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	      *(a2 + 1) = A2;
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	    } else 
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	      if (b2 != a2) {
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		*(a2 + 0) = B3;
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		*(a2 + 1) = B4;
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		*(b2 + 0) = A3;
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		*(b2 + 1) = A4;
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	      }
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	  } else 
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	    if (b1 == a2) {
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	      if (b2 != a1) {
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		if (b2 == a2) {
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		  *(a1 + 0) = A3;
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		  *(a1 + 1) = A4;
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		  *(a2 + 0) = A1;
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		  *(a2 + 1) = A2;
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		} else {
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		  *(a1 + 0) = A3;
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		  *(a1 + 1) = A4;
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		  *(a2 + 0) = B3;
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		  *(a2 + 1) = B4;
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		  *(b2 + 0) = A1;
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		  *(b2 + 1) = A2;
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		}
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	      }
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	    } else {
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	      if (b2 == a1) {
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		*(a1 + 0) = A3;
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		*(a1 + 1) = A4;
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		*(a2 + 0) = B1;
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		*(a2 + 1) = B2;
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		*(b1 + 0) = A1;
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		*(b1 + 1) = A2;
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	      } else 
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		if (b2 == a2) {
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		  *(a1 + 0) = B1;
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		  *(a1 + 1) = B2;
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		  *(b1 + 0) = A1;
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		  *(b1 + 1) = A2;
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		} else 
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		  if (b2 == b1) {
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		    *(a1 + 0) = B1;
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		    *(a1 + 1) = B2;
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		    *(a2 + 0) = A1;
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		    *(a2 + 1) = A2;
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		    *(b1 + 0) = A3;
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		    *(b1 + 1) = A4;
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		  } else {
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		    *(a1 + 0) = B1;
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		    *(a1 + 1) = B2;
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		    *(a2 + 0) = B3;
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		    *(a2 + 1) = B4;
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		    *(b1 + 0) = A1;
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		    *(b1 + 1) = A2;
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		    *(b2 + 0) = A3;
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		    *(b2 + 1) = A4;
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		  }
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	    }
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	  b1 = a + ip1;
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	  b2 = a + ip2;
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#ifndef MINUS
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	  a1 += 4;
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#else
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	  a1 -= 4;
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#endif
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	i --;
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	} while (i > 0);
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      }
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      i = ((k2 - k1) & 1);
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      if (i > 0) {
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	A1 = *(a1 + 0);
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	A2 = *(a1 + 1);
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	B1 = *(b1 + 0);
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	B2 = *(b1 + 1);
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	*(a1 + 0) = B1;
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	*(a1 + 1) = B2;
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	*(b1 + 0) = A1;
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	*(b1 + 1) = A2;
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      }
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      a += lda;
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      j --;
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    } while (j > 0);
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  }
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  return 0;
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} 
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