/*
 *             Automatically Tuned Linear Algebra Software v3.2
 *                    (C) Copyright 1999 R. Clint Whaley                     
 *
 * 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.
 *   3. The name of the University of Tennessee, the ATLAS group,
 *      or the names of its contributers may not be used to endorse
 *      or promote products derived from this software without specific
 *      written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * ``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 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. 
 *
 */

#define SREAL
#include "atlas_misc.h"
#include "cblas.h"
#ifdef ATL_USEPTHREADS
   #include "atlas_ptalias2.h"
#endif
#include "atlas_level2.h"

void cblas_stbsv(const enum CBLAS_ORDER Order, const enum CBLAS_UPLO Uplo,
                 const enum CBLAS_TRANSPOSE TA, const enum CBLAS_DIAG Diag,
                 const int N, const int K, const float *A, const int lda,
                 float *X, const int incX)
{
   int info = 2000;
   enum CBLAS_UPLO uplo;
   enum CBLAS_TRANSPOSE ta;
   #define x X

#ifndef NoCblasErrorChecks
   if (Order != CblasColMajor && Order != CblasRowMajor)
      info = cblas_errprn(1, info, "Order must be %d or %d, but is set to %d",
                          CblasRowMajor, CblasColMajor, Order);
   if (Uplo != CblasUpper && Uplo != CblasLower)
      info = cblas_errprn(2, info, "UPLO must be %d or %d, but is set to %d",
                          CblasUpper, CblasLower, Uplo);
   if (TA != CblasNoTrans && TA != CblasTrans && TA != CblasConjTrans)
      info = cblas_errprn(3, info, 
                          "TransA must be %d, %d or %d, but is set to %d",
                          CblasNoTrans, CblasTrans, CblasConjTrans, TA);
   if (Diag != CblasUnit && Diag != CblasNonUnit)
      info = cblas_errprn(4, info, "DIAG must be %d or %d, but is set to %d",
                          CblasUnit, CblasNonUnit, Diag);

   if (N < 0) info = cblas_errprn(5, info, 
                        "N cannot be less than zero; is set to %d.", N);
   if (K < 0)
      info = cblas_errprn(6, info, "Valid K: 0 < K < N; K=%d, N=%d.", K, N);
   if (lda < K+1)
      info = cblas_errprn(8, info, "lda must be >= K+1: lda=%d K=%d", lda, K);
   if (!incX) 
      info = cblas_errprn(10, info, "incX cannot be zero; is set to %d.", incX);
   if (info != 2000)
   {
      cblas_xerbla(info, "cblas_stbsv", "");
      return;
   }
#endif
   if (incX < 0) x += (1-N)*incX;
   if (Order == CblasColMajor)
      ATL_stbsv(Uplo, TA, Diag, N, K, A, lda, x, incX);
   else
   {
      uplo = ( (Uplo == CblasUpper) ? CblasLower : CblasUpper );
      if (TA == CblasNoTrans) ta = CblasTrans;
      else ta = CblasNoTrans;
      ATL_stbsv(uplo, ta, Diag, N, K, A, lda, x, incX);
   }
}
