Blame thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/lapack/lauum/lauum_U_parallel.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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/*    (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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blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG myid) {
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  BLASLONG n, bk, i, blocking, lda;
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  int mode;
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  blas_arg_t newarg;
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  FLOAT *a;
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  FLOAT alpha[2] = { ONE, ZERO};
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#ifndef COMPLEX
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#ifdef XDOUBLE
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  mode  =  BLAS_XDOUBLE | BLAS_REAL;
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#elif defined(DOUBLE)
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  mode  =  BLAS_DOUBLE  | BLAS_REAL;
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#else
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  mode  =  BLAS_SINGLE  | BLAS_REAL;
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#endif  
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#else
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#ifdef XDOUBLE
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  mode  =  BLAS_XDOUBLE | BLAS_COMPLEX;
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#elif defined(DOUBLE)
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  mode  =  BLAS_DOUBLE  | BLAS_COMPLEX;
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#else
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  mode  =  BLAS_SINGLE  | BLAS_COMPLEX;
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#endif  
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#endif
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  if (args -> nthreads  == 1) {
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    LAUUM_U_SINGLE(args, NULL, NULL, sa, sb, 0); 
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    return 0;
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  }
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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) n  = range_n[1] - range_n[0];
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  if (n <= GEMM_UNROLL_N * 2) {
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    LAUUM_U_SINGLE(args, NULL, range_n, sa, sb, 0);
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    return 0;
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  }
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  newarg.lda = lda;
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  newarg.ldb = lda;
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  newarg.ldc = lda;
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  newarg.alpha = alpha;
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  newarg.beta = NULL;
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  newarg.nthreads = args -> nthreads;
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  blocking = (n / 2 + GEMM_UNROLL_N - 1) & ~(GEMM_UNROLL_N - 1);
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  if (blocking > GEMM_Q) blocking = GEMM_Q;
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  for (i = 0; i < n; i += blocking) {
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    bk = n - i;
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    if (bk > blocking) bk = blocking;
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    newarg.n = i;
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    newarg.k = bk;
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    newarg.a = a + (    i * lda) * COMPSIZE;
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    newarg.c = a;
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    syrk_thread(mode | BLAS_TRANSA_N | BLAS_TRANSB_T,
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		&newarg, NULL, NULL, (void *)HERK_UN, sa, sb, args -> nthreads);
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    newarg.m = i;
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    newarg.n = bk;
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    newarg.a = a + (i + i * lda) * COMPSIZE;
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    newarg.b = a + (    i * lda) * COMPSIZE;
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    gemm_thread_m(mode | BLAS_TRANSA_T | BLAS_RSIDE,
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		  &newarg, NULL, NULL, (void *)TRMM_RCUN, sa, sb, args -> nthreads);
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    newarg.m = bk;
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    newarg.n = bk;
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    newarg.a = a + (i + i * lda) * COMPSIZE;
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    CNAME(&newarg, NULL, NULL, sa, sb, 0);
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  }
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  return 0;
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}