/*********************************************************************/

/* 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></stdio.h>

#include "common.h"

blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG myid) {

  BLASLONG n, bk, i, blocking, lda;

  BLASLONG info;

  int mode;

  blas_arg_t newarg;

  FLOAT *a;

  FLOAT alpha[2] = { -ONE, ZERO};

#ifndef COMPLEX

#ifdef XDOUBLE

  mode  =  BLAS_XDOUBLE | BLAS_REAL;

#elif defined(DOUBLE)

  mode  =  BLAS_DOUBLE  | BLAS_REAL;

#else

  mode  =  BLAS_SINGLE  | BLAS_REAL;

#endif  

#else

#ifdef XDOUBLE

  mode  =  BLAS_XDOUBLE | BLAS_COMPLEX;

#elif defined(DOUBLE)

  mode  =  BLAS_DOUBLE  | BLAS_COMPLEX;

#else

  mode  =  BLAS_SINGLE  | BLAS_COMPLEX;

#endif  

#endif

  if (args -> nthreads  == 1) {

    info = POTRF_L_SINGLE(args, NULL, NULL, sa, sb, 0); 

    return info;

  }

  n  = args -> n;

  a  = (FLOAT *)args -> a;

  lda = args -> lda;

  if (range_n) n  = range_n[1] - range_n[0];

  if (n <= GEMM_UNROLL_N * 4) {

    info = POTRF_L_SINGLE(args, NULL, range_n, sa, sb, 0);

    return info;

  }

  newarg.lda = lda;

  newarg.ldb = lda;

  newarg.ldc = lda;

  newarg.alpha = alpha;

  newarg.beta = NULL;

  newarg.nthreads = args -> nthreads;

  blocking = (n / 2 + GEMM_UNROLL_N - 1) & ~(GEMM_UNROLL_N - 1);

  if (blocking > GEMM_Q) blocking = GEMM_Q;

  for (i = 0; i < n; i += blocking) {

    bk = n - i;

    if (bk > blocking) bk = blocking;

    newarg.m = bk;

    newarg.n = bk;

    newarg.a = a + (i + i * lda) * COMPSIZE;

    info = CNAME(&newarg, NULL, NULL, sa, sb, 0);

    if (info) return info + i;

    if (n - i - bk > 0) {

      newarg.m = n - i - bk;

      newarg.n = bk;

      newarg.a = a + (i      + i * lda) * COMPSIZE;

      newarg.b = a + (i + bk + i * lda) * COMPSIZE;

      gemm_thread_m(mode | BLAS_RSIDE | BLAS_TRANSA_T | BLAS_UPLO,

		    &newarg, NULL, NULL, (void *)TRSM_RCLN, sa, sb, args -> nthreads);

      newarg.n = n - i - bk;

      newarg.k = bk;

      newarg.a = a + (i + bk +  i       * lda) * COMPSIZE;

      newarg.c = a + (i + bk + (i + bk) * lda) * COMPSIZE;

#ifndef USE_SIMPLE_THREADED_LEVEL3

      HERK_THREAD_LN(&newarg, NULL, NULL, sa, sb, 0);

#else

      syrk_thread(mode | BLAS_TRANSA_N | BLAS_TRANSB_T | BLAS_UPLO,

		  &newarg, NULL, NULL, (void *)HERK_LN, sa, sb, args -> nthreads);

#endif

    }

  }

  return 0;

}