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      1 /*
      2  *
      3  * cblas_dsymv.c
      4  * This program is a C interface to dsymv.
      5  * Written by Keita Teranishi
      6  * 4/6/1998
      7  *
      8  */
      9 
     10 #include "cblas.h"
     11 #include "cblas_f77.h"
     12 void cblas_dsymv(const enum CBLAS_ORDER order,
     13                  const enum CBLAS_UPLO Uplo, const int N,
     14                  const double alpha, const double  *A, const int lda,
     15                  const double  *X, const int incX, const double beta,
     16                  double  *Y, const int incY)
     17 {
     18    char UL;
     19 #ifdef F77_CHAR
     20    F77_CHAR F77_UL;
     21 #else
     22    #define F77_UL &UL
     23 #endif
     24 #ifdef F77_INT
     25    F77_INT F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
     26 #else
     27    #define F77_N N
     28    #define F77_lda lda
     29    #define F77_incX incX
     30    #define F77_incY incY
     31 #endif
     32    extern int CBLAS_CallFromC;
     33    extern int RowMajorStrg;
     34    RowMajorStrg = 0;
     35 
     36    CBLAS_CallFromC = 1;
     37    if (order == CblasColMajor)
     38    {
     39       if (Uplo == CblasUpper) UL = 'U';
     40       else if (Uplo == CblasLower) UL = 'L';
     41       else
     42       {
     43          cblas_xerbla(2, "cblas_dsymv","Illegal Uplo setting, %d\n",Uplo );
     44          CBLAS_CallFromC = 0;
     45          RowMajorStrg = 0;
     46          return;
     47       }
     48       #ifdef F77_CHAR
     49          F77_UL = C2F_CHAR(&UL);
     50       #endif
     51       F77_dsymv(F77_UL, &F77_N, &alpha, A, &F77_lda, X,
     52                      &F77_incX, &beta, Y, &F77_incY);
     53    }
     54    else if (order == CblasRowMajor)
     55    {
     56       RowMajorStrg = 1;
     57       if (Uplo == CblasUpper) UL = 'L';
     58       else if (Uplo == CblasLower) UL = 'U';
     59       else
     60       {
     61          cblas_xerbla(2, "cblas_dsymv","Illegal Uplo setting, %d\n", Uplo);
     62          CBLAS_CallFromC = 0;
     63          RowMajorStrg = 0;
     64          return;
     65       }
     66       #ifdef F77_CHAR
     67          F77_UL = C2F_CHAR(&UL);
     68       #endif
     69       F77_dsymv(F77_UL, &F77_N, &alpha,
     70                      A ,&F77_lda, X,&F77_incX, &beta, Y, &F77_incY);
     71    }
     72    else cblas_xerbla(1, "cblas_dsymv", "Illegal Order setting, %d\n", order);
     73    CBLAS_CallFromC = 0;
     74    RowMajorStrg = 0;
     75    return;
     76 }
     77