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/*********************************************************************/
/* 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 <ctype.h>
#include "common.h"
const static FLOAT dm1 = -1.;
int CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *b, BLASLONG incb, void *buffer){
BLASLONG i, is, min_i;
#if (TRANSA == 2) || (TRANSA == 4)
FLOAT _Complex result;
#endif
#ifndef UNIT
FLOAT ar, ai, br, bi, ratio, den;
#endif
FLOAT *gemvbuffer = (FLOAT *)buffer;
FLOAT *B = b;
if (incb != 1) {
B = buffer;
gemvbuffer = (FLOAT *)(((BLASLONG)buffer + m * sizeof(FLOAT) * 2 + 4095) & ~4095);
COPY_K(m, b, incb, buffer, 1);
}
for (is = m; is > 0; is -= DTB_ENTRIES){
min_i = MIN(is, DTB_ENTRIES);
#if (TRANSA == 2) || (TRANSA == 4)
if (m - is > 0){
#if TRANSA == 2
GEMV_T(m - is, min_i, 0, dm1, ZERO,
a + (is + (is - min_i) * lda) * COMPSIZE, lda,
B + is * COMPSIZE, 1,
B + (is - min_i) * COMPSIZE, 1, gemvbuffer);
#else
GEMV_C(m - is, min_i, 0, dm1, ZERO,
a + (is + (is - min_i) * lda) * COMPSIZE, lda,
B + is * COMPSIZE, 1,
B + (is - min_i) * COMPSIZE, 1, gemvbuffer);
#endif
}
#endif
for (i = 0; i < min_i; i++) {
FLOAT *AA = a + ((is - i - 1) + (is - i - 1) * lda) * COMPSIZE;
FLOAT *BB = B + (is - i - 1) * COMPSIZE;
#if (TRANSA == 2) || (TRANSA == 4)
if (i > 0) {
#if TRANSA == 2
result = DOTU_K(i, AA + 2, 1, BB + 2, 1);
#else
result = DOTC_K(i, AA + 2, 1, BB + 2, 1);
#endif
BB[0] -= CREAL(result);
BB[1] -= CIMAG(result);
}
#endif
#ifndef UNIT
ar = AA[0];
ai = AA[1];
if (fabs(ar) >= fabs(ai)){
ratio = ai / ar;
den = 1./(ar * ( 1 + ratio * ratio));
ar = den;
#if TRANSA < 3
ai = -ratio * den;
#else
ai = ratio * den;
#endif
} else {
ratio = ar / ai;
den = 1./(ai * ( 1 + ratio * ratio));
ar = ratio * den;
#if TRANSA < 3
ai = -den;
#else
ai = den;
#endif
}
br = BB[0];
bi = BB[1];
BB[0] = ar*br - ai*bi;
BB[1] = ar*bi + ai*br;
#endif
#if (TRANSA == 1) || (TRANSA == 3)
if (i < min_i - 1) {
#if TRANSA == 1
AXPYU_K (min_i - i - 1, 0, 0, - BB[0], -BB[1],
AA - (min_i - i - 1) * COMPSIZE, 1, BB - (min_i - i - 1) * COMPSIZE, 1, NULL, 0);
#else
AXPYC_K(min_i - i - 1, 0, 0, - BB[0], -BB[1],
AA - (min_i - i - 1) * COMPSIZE, 1, BB - (min_i - i - 1) * COMPSIZE, 1, NULL, 0);
#endif
}
#endif
}
#if (TRANSA == 1) || (TRANSA == 3)
if (is - min_i > 0){
#if TRANSA == 1
GEMV_N(is - min_i, min_i, 0, dm1, ZERO,
a + (is - min_i) * lda * COMPSIZE, lda,
B + (is - min_i) * COMPSIZE, 1,
B, 1, gemvbuffer);
#else
GEMV_R(is - min_i, min_i, 0, dm1, ZERO,
a + (is - min_i) * lda * COMPSIZE, lda,
B + (is - min_i) * COMPSIZE, 1,
B, 1, gemvbuffer);
#endif
}
#endif
}
if (incb != 1) {
COPY_K(m, buffer, 1, b, incb);
}
return 0;
}
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