/*********************************************************************/
/* 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 PREFETCHSIZE 8
#define a2 (a1 + 1)
#define a4 (a3 + 1)
#define a6 (a5 + 1)
#define a8 (a7 + 1)
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, B1, B2, A3, A4, B3, B4;
FLOAT A5, A6, B5, B6, A7, A8, B7, B8;
a--;
k1 --;
ipiv += k1;
if (n <= 0) return 0;
j = (n >> 2);
if (j > 0) {
do {
piv = ipiv;
a1 = a + k1 + 1;
a3 = a1 + 1 * lda;
a5 = a1 + 2 * lda;
a7 = a1 + 3 * lda;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
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 {
#ifdef __GNUC__
__builtin_prefetch(a1 + PREFETCHSIZE, 0, 0);
__builtin_prefetch(a3 + PREFETCHSIZE, 0, 0);
__builtin_prefetch(a5 + PREFETCHSIZE, 0, 0);
__builtin_prefetch(a7 + PREFETCHSIZE, 0, 0);
#endif
A1 = *a1;
A2 = *a2;
A3 = *a3;
A4 = *a4;
A5 = *a5;
A6 = *a6;
A7 = *a7;
A8 = *a8;
B1 = *b1;
B2 = *b2;
B3 = *b3;
B4 = *b4;
B5 = *b5;
B6 = *b6;
B7 = *b7;
B8 = *b8;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
piv += 2;
if (b1 == a1) {
if (b2 == a2) {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
*(buffer + 2) = A5;
*(buffer + 3) = A7;
*(buffer + 4) = A2;
*(buffer + 5) = A4;
*(buffer + 6) = A6;
*(buffer + 7) = A8;
} else {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
*(buffer + 2) = A5;
*(buffer + 3) = A7;
*(buffer + 4) = B2;
*(buffer + 5) = B4;
*(buffer + 6) = B6;
*(buffer + 7) = B8;
*b2 = A2;
*b4 = A4;
*b6 = A6;
*b8 = A8;
}
} else
if (b1 == a2) {
if (b2 == a2) {
*(buffer + 0) = A2;
*(buffer + 1) = A4;
*(buffer + 2) = A6;
*(buffer + 3) = A8;
*(buffer + 4) = A1;
*(buffer + 5) = A3;
*(buffer + 6) = A5;
*(buffer + 7) = A7;
} else {
*(buffer + 0) = A2;
*(buffer + 1) = A4;
*(buffer + 2) = A6;
*(buffer + 3) = A8;
*(buffer + 4) = B2;
*(buffer + 5) = B4;
*(buffer + 6) = B6;
*(buffer + 7) = B8;
*b2 = A1;
*b4 = A3;
*b6 = A5;
*b8 = A7;
}
} else {
if (b2 == a2) {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = B5;
*(buffer + 3) = B7;
*(buffer + 4) = A2;
*(buffer + 5) = A4;
*(buffer + 6) = A6;
*(buffer + 7) = A8;
*b1 = A1;
*b3 = A3;
*b5 = A5;
*b7 = A7;
} else
if (b2 == b1) {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = B5;
*(buffer + 3) = B7;
*(buffer + 4) = A1;
*(buffer + 5) = A3;
*(buffer + 6) = A5;
*(buffer + 7) = A7;
*b1 = A2;
*b3 = A4;
*b5 = A6;
*b7 = A8;
} else {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = B5;
*(buffer + 3) = B7;
*(buffer + 4) = B2;
*(buffer + 5) = B4;
*(buffer + 6) = B6;
*(buffer + 7) = B8;
*b1 = A1;
*b2 = A2;
*b3 = A3;
*b4 = A4;
*b5 = A5;
*b6 = A6;
*b7 = A7;
*b8 = A8;
}
}
buffer += 8;
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 += 2;
a3 += 2;
a5 += 2;
a7 += 2;
i --;
} while (i > 0);
}
i = ((k2 - k1) & 1);
if (i > 0) {
A1 = *a1;
B1 = *b1;
A3 = *a3;
B3 = *b3;
A5 = *a5;
B5 = *b5;
A7 = *a7;
B7 = *b7;
if (a1 == b1) {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
*(buffer + 2) = A5;
*(buffer + 3) = A7;
} else {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = B5;
*(buffer + 3) = B7;
*b1 = A1;
*b3 = A3;
*b5 = A5;
*b7 = A7;
}
buffer += 4;
}
a += 4 * lda;
j --;
} while (j > 0);
}
if (n & 2) {
piv = ipiv;
a1 = a + k1 + 1;
a3 = a1 + 1 * lda;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
piv += 2;
b1 = a + ip1;
b2 = a + ip2;
b3 = b1 + 1 * lda;
b4 = b2 + 1 * lda;
i = ((k2 - k1) >> 1);
if (i > 0) {
do {
A1 = *a1;
A2 = *a2;
A3 = *a3;
A4 = *a4;
B1 = *b1;
B2 = *b2;
B3 = *b3;
B4 = *b4;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
piv += 2;
if (b1 == a1) {
if (b2 == a2) {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
*(buffer + 2) = A2;
*(buffer + 3) = A4;
} else {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
*(buffer + 2) = B2;
*(buffer + 3) = B4;
*b2 = A2;
*b4 = A4;
}
} else
if (b1 == a2) {
if (b2 == a2) {
*(buffer + 0) = A2;
*(buffer + 1) = A4;
*(buffer + 2) = A1;
*(buffer + 3) = A3;
} else {
*(buffer + 0) = A2;
*(buffer + 1) = A4;
*(buffer + 2) = B2;
*(buffer + 3) = B4;
*b2 = A1;
*b4 = A3;
}
} else {
if (b2 == a2) {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = A2;
*(buffer + 3) = A4;
*b1 = A1;
*b3 = A3;
} else
if (b2 == b1) {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = A1;
*(buffer + 3) = A3;
*b1 = A2;
*b3 = A4;
} else {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*(buffer + 2) = B2;
*(buffer + 3) = B4;
*b1 = A1;
*b2 = A2;
*b3 = A3;
*b4 = A4;
}
}
buffer += 4;
b1 = a + ip1;
b2 = a + ip2;
b3 = b1 + 1 * lda;
b4 = b2 + 1 * lda;
a1 += 2;
a3 += 2;
i --;
} while (i > 0);
}
i = ((k2 - k1) & 1);
if (i > 0) {
A1 = *a1;
B1 = *b1;
A3 = *a3;
B3 = *b3;
if (a1 == b1) {
*(buffer + 0) = A1;
*(buffer + 1) = A3;
} else {
*(buffer + 0) = B1;
*(buffer + 1) = B3;
*b1 = A1;
*b3 = A3;
}
buffer += 2;
}
a += 2 * lda;
}
if (n & 1) {
piv = ipiv;
a1 = a + k1 + 1;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
piv += 2;
b1 = a + ip1;
b2 = a + ip2;
i = ((k2 - k1) >> 1);
if (i > 0) {
do {
A1 = *a1;
A2 = *a2;
B1 = *b1;
B2 = *b2;
ip1 = *(piv + 0);
ip2 = *(piv + 1);
piv += 2;
if (b1 == a1) {
if (b2 == a2) {
*(buffer + 0) = A1;
*(buffer + 1) = A2;
} else {
*(buffer + 0) = A1;
*(buffer + 1) = B2;
*b2 = A2;
}
} else
if (b1 == a2) {
if (b2 == a2) {
*(buffer + 0) = A2;
*(buffer + 1) = A1;
} else {
*(buffer + 0) = A2;
*(buffer + 1) = B2;
*b2 = A1;
}
} else {
if (b2 == a2) {
*(buffer + 0) = B1;
*(buffer + 1) = A2;
*b1 = A1;
} else
if (b2 == b1) {
*(buffer + 0) = B1;
*(buffer + 1) = A1;
*b1 = A2;
} else {
*(buffer + 0) = B1;
*(buffer + 1) = B2;
*b1 = A1;
*b2 = A2;
}
}
buffer += 2;
b1 = a + ip1;
b2 = a + ip2;
a1 += 2;
i --;
} while (i > 0);
}
i = ((k2 - k1) & 1);
if (i > 0) {
A1 = *a1;
B1 = *b1;
if (a1 == b1) {
*(buffer + 0) = A1;
} else {
*(buffer + 0) = B1;
*b1 = A1;
}
}
}
return 0;
}