94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
/*********************************************************************/
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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>
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#include <math.h>
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#include "common.h"
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static FLOAT dm1 = -1.;
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static FLOAT dp1 = 1.;
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#ifndef SQRT
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#define SQRT(x) sqrt(x)
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#endif
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blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG myid) {
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BLASLONG n, lda;
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FLOAT *a;
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FLOAT ajj;
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BLASLONG i, j;
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n = args -> n;
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a = (FLOAT *)args -> a;
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lda = args -> lda;
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if (range_n) {
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n = range_n[1] - range_n[0];
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a += range_n[0] * (lda + 1) * COMPSIZE;
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}
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for (j = 0; j < n; j++) {
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ajj = *(a + j) - DOTU_K(j, a, 1, a, 1);
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if (ajj <= 0){
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*(a + j) = ajj;
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return j + 1;
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}
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ajj = SQRT(ajj);
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*(a + j) = ajj;
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i = n - j - 1;
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if (i > 0) {
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GEMV_T(j, i, 0, dm1,
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a + lda, lda,
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a, 1,
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a + j + lda, lda, sb);
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SCAL_K(i, 0, 0, dp1 / ajj,
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a + j + lda, lda, NULL, 0, NULL, 0);
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}
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a += lda;
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}
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return 0;
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}
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