text: /* 
   * -- High Performance Computing Linpack Benchmark (HPL)                
   *    HPL - 2.0 - September 10, 2008                          
   *    Antoine P. Petitet                                                
   *    University of Tennessee, Knoxville                                
   *    Innovative Computing Laboratory                                 
   *    (C) Copyright 2000-2008 All Rights Reserved                       
   *                                                                      
   * -- Copyright notice and Licensing terms:                             
   *                                                                      
   * 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. All  advertising  materials  mentioning  features  or  use of this
   * software must display the following acknowledgement:                 
   * This  product  includes  software  developed  at  the  University  of
   * Tennessee, Knoxville, Innovative Computing Laboratory.             
   *                                                                      
   * 4. The name of the  University,  the name of the  Laboratory,  or the
   * names  of  its  contributors  may  not  be used to endorse or promote
   * products  derived   from   this  software  without  specific  written
   * permission.                                                          
   *                                                                      
   * -- Disclaimer:                                                       
   *                                                                      
   * 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. 
   * ---------------------------------------------------------------------
   */ 
  /*
   * Include files
   */
  #include "hpl.h"
  
  #ifndef HPL_dgemv
  
  #ifdef HPL_CALL_VSIPL
  
  #ifdef STDC_HEADERS
  static void HPL_dgemv0
  (
     const enum HPL_TRANS       TRANS,
     const int                  M,
     const int                  N,
     const double               ALPHA,
     const double               * A,
     const int                  LDA,
     const double               * X,
     const int                  INCX,
     const double               BETA,
     double                     * Y,
     const int                  INCY
  )
  #else
  static void HPL_dgemv0( TRANS, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY )
     const enum HPL_TRANS       TRANS;
     const int                  INCX, INCY, LDA, M, N;
     const double               ALPHA, BETA;
     const double               * A, * X;
     double                     * Y;
  #endif
  {
  /*
   * .. Local Variables ..
   */
     int                        i, iaij, ix, iy, j, jaj, jx, jy;
     register double            t0;
  /* ..
   * .. Executable Statements ..
   */
     if( ( M == 0 ) || ( N == 0 ) ||
         ( ( ALPHA == HPL_rzero ) && ( BETA == HPL_rone  ) ) ) return;
   
     if( ALPHA == HPL_rzero ) { HPL_dscal( M, BETA, Y, INCY ); return; }
   
     if( TRANS == HplNoTrans )
     {
        HPL_dscal( M, BETA, Y, INCY );
        for( j = 0, jaj  = 0, jx = 0; j < N; j++, jaj += LDA, jx += INCX )
        {
           t0 = ALPHA * X[jx];
           for( i = 0, iaij = jaj, iy = 0; i < M; i++, iaij += 1, iy += INCY )
           { Y[iy] += A[iaij] * t0; }
        }
     }
     else
     {
        for( j = 0, jaj  = 0, jy  = 0; j < N; j++, jaj += LDA, jy += INCY )
        {
           t0 = HPL_rzero;
           for( i = 0, iaij = jaj, ix = 0; i < M; i++, iaij += 1, ix += INCX )
           { t0 += A[iaij] * X[ix]; }
           if( BETA == HPL_rzero ) Y[jy] = ALPHA * t0;
           else                    Y[jy] = BETA * Y[jy] + ALPHA * t0;
        }
     }
  }
  #endif
  
  #ifdef STDC_HEADERS
  void HPL_dgemv
  (
     const enum HPL_ORDER             ORDER,
     const enum HPL_TRANS             TRANS,
     const int                        M,
     const int                        N,
     const double                     ALPHA,
     const double *                   A,
     const int                        LDA,
     const double *                   X,
     const int                        INCX,
     const double                     BETA,
     double *                         Y,
     const int                        INCY
  )
  #else
  void HPL_dgemv
  ( ORDER, TRANS, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY )
     const enum HPL_ORDER             ORDER;
     const enum HPL_TRANS             TRANS;
     const int                        M;
     const int                        N;
     const double                     ALPHA;
     const double *                   A;
     const int                        LDA;
     const double *                   X;
     const int                        INCX;
     const double                     BETA;
     double *                         Y;
     const int                        INCY;
  #endif
  {
  /* 
   * Purpose
   * =======
   *
   * HPL_dgemv performs one of the matrix-vector operations
   *  
   *     y := alpha * op( A ) * x + beta * y,
   *  
   *  where op( X ) is one of
   *  
   *     op( X ) = X   or   op( X ) = X^T.
   *  
   * where alpha and beta are scalars, x and y are vectors and  A  is an m
   * by n matrix.
   *
   * Arguments
   * =========
   *
   * ORDER   (local input)                 const enum HPL_ORDER
   *         On entry, ORDER  specifies the storage format of the operands
   *         as follows:                                                  
   *            ORDER = HplRowMajor,                                      
   *            ORDER = HplColumnMajor.                                   
   *
   * TRANS   (local input)                 const enum HPL_TRANS
   *         On entry,  TRANS  specifies the  operation to be performed as
   *         follows:   
   *            TRANS = HplNoTrans y := alpha*A  *x + beta*y,
   *            TRANS = HplTrans   y := alpha*A^T*x + beta*y.
   *
   * M       (local input)                 const int
   *         On entry,  M  specifies  the number of rows of  the matrix A.
   *         M must be at least zero.
   *
   * N       (local input)                 const int
   *         On entry, N  specifies the number of columns of the matrix A.
   *         N must be at least zero.
   *
   * ALPHA   (local input)                 const double
   *         On entry, ALPHA specifies the scalar alpha.   When  ALPHA  is
   *         supplied as zero then  A and X  need not be set on input.
   *
   * A       (local input)                 const double *
   *         On entry,  A  points  to an array of size equal to or greater
   *         than LDA * n.  Before  entry, the leading m by n part  of the
   *         array  A  must contain the matrix coefficients.
   *
   * LDA     (local input)                 const int
   *         On entry,  LDA  specifies  the  leading  dimension  of  A  as
   *         declared  in  the  calling  (sub) program.  LDA  must  be  at
   *         least MAX(1,m).
   *
   * X       (local input)                 const double *
   *         On entry,  X  is an incremented array of dimension  at  least
   *         ( 1 + ( n - 1 ) * abs( INCX ) )  that  contains the vector x.
   *
   * INCX    (local input)                 const int
   *         On entry, INCX specifies the increment for the elements of X.
   *         INCX must not be zero.
   *
   * BETA    (local input)                 const double
   *         On entry, BETA  specifies the scalar beta.    When  ALPHA  is
   *         supplied as zero then  Y  need not be set on input.
   *
   * Y       (local input/output)          double *
   *         On entry,  Y  is an incremented array of dimension  at  least
   *         ( 1 + ( n - 1 ) * abs( INCY ) )  that  contains the vector y.
   *         Before entry with BETA non-zero, the incremented array Y must
   *         contain the vector  y.  On exit,  Y  is  overwritten  by  the
   *         updated vector y.
   *
   * INCY    (local input)                 const int
   *         On entry, INCY specifies the increment for the elements of Y.
   *         INCY must not be zero.
   *
   * ---------------------------------------------------------------------
   */ 
  #ifdef HPL_CALL_CBLAS
     cblas_dgemv( ORDER, TRANS, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY );
  #endif
  #ifdef HPL_CALL_VSIPL
     if( ORDER == HplColumnMajor )
     {
        HPL_dgemv0( TRANS, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY );
     }
     else
     {
        HPL_dgemv0( ( TRANS == HplNoTrans ? HplTrans : HplNoTrans ),
                    N, M, ALPHA, A, LDA, X, INCX, BETA, Y, INCY );
     }
  #endif
  #ifdef HPL_CALL_FBLAS
     double                    alpha = ALPHA, beta = BETA;
  #ifdef StringSunStyle
  #ifdef HPL_USE_F77_INTEGER_DEF
     F77_INTEGER               IONE = 1;
  #else
     int                       IONE = 1;
  #endif
  #endif
  #ifdef StringStructVal
     F77_CHAR                  ftran;
  #endif
  #ifdef StringStructPtr
     F77_CHAR                  ftran;
  #endif
  #ifdef StringCrayStyle
     F77_CHAR                  ftran;
  #endif
   
  #ifdef HPL_USE_F77_INTEGER_DEF
     const F77_INTEGER         F77M    = M,   F77N    = N,
                               F77lda  = LDA, F77incx = INCX, F77incy = INCY;
  #else
  #define F77M                 M
  #define F77N                 N
  #define F77lda               LDA
  #define F77incx              INCX
  #define F77incy              INCY
  #endif
     char                      ctran;
  
     if( ORDER == HplColumnMajor )
     {
        ctran = ( TRANS == HplNoTrans ? 'N' : 'T' );
  
  #ifdef StringSunStyle
        F77dgemv( &ctran, &F77M, &F77N, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy, IONE );
  #endif
  #ifdef StringCrayStyle
        ftran = HPL_C2F_CHAR( ctran );
        F77dgemv( ftran,  &F77M, &F77N, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
  #ifdef StringStructVal
        ftran.len = 1; ftran.cp = &ctran;
        F77dgemv( ftran,  &F77M, &F77N, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
  #ifdef StringStructPtr
        ftran.len = 1; ftran.cp = &ctran;
        F77dgemv( &ftran, &F77M, &F77N, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
     }
     else
     {
        ctran = ( TRANS == HplNoTrans ? 'T' : 'N' );
  #ifdef StringSunStyle
        F77dgemv( &ctran, &F77N, &F77M, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy, IONE );
  #endif
  #ifdef StringCrayStyle
        ftran = HPL_C2F_CHAR( ctran );
        F77dgemv( ftran,  &F77N, &F77M, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
  #ifdef StringStructVal
        ftran.len = 1; ftran.cp = &ctran;
        F77dgemv( ftran,  &F77N, &F77M, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
  #ifdef StringStructPtr
        ftran.len = 1; ftran.cp = &ctran;
        F77dgemv( &ftran, &F77N, &F77M, &alpha, A, &F77lda, X, &F77incx,
                  &beta, Y, &F77incy );
  #endif
     }
  
  #endif
  /*
   * End of HPL_dgemv
   */
  }
  
  #endif
  