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      1 /*
      2  *
      3  * cblas_dsyr2k.c
      4  * This program is a C interface to dsyr2k.
      5  * Written by Keita Teranishi
      6  * 4/6/1998
      7  *
      8  */
      9 
     10 #include "cblas.h"
     11 #include "cblas_f77.h"
     12 void cblas_dsyr2k(const enum CBLAS_ORDER Order, const enum CBLAS_UPLO Uplo,
     13                   const enum CBLAS_TRANSPOSE Trans, const int N, const int K,
     14                   const double alpha, const double  *A, const int lda,
     15                   const double  *B, const int ldb, const double beta,
     16                   double  *C, const int ldc)
     17 {
     18    char UL, TR;
     19 #ifdef F77_CHAR
     20    F77_CHAR F77_TA, F77_UL;
     21 #else
     22    #define F77_TR &TR
     23    #define F77_UL &UL
     24 #endif
     25 
     26 #ifdef F77_INT
     27    F77_INT F77_N=N, F77_K=K, F77_lda=lda, F77_ldb=ldb;
     28    F77_INT F77_ldc=ldc;
     29 #else
     30    #define F77_N N
     31    #define F77_K K
     32    #define F77_lda lda
     33    #define F77_ldb ldb
     34    #define F77_ldc ldc
     35 #endif
     36 
     37    extern int CBLAS_CallFromC;
     38    extern int RowMajorStrg;
     39    RowMajorStrg = 0;
     40    CBLAS_CallFromC = 1;
     41 
     42    if( Order == CblasColMajor )
     43    {
     44 
     45       if( Uplo == CblasUpper) UL='U';
     46       else if ( Uplo == CblasLower ) UL='L';
     47       else
     48       {
     49          cblas_xerbla(2, "cblas_dsyr2k","Illegal Uplo setting, %d\n", Uplo);
     50          CBLAS_CallFromC = 0;
     51          RowMajorStrg = 0;
     52          return;
     53       }
     54 
     55       if( Trans == CblasTrans) TR ='T';
     56       else if ( Trans == CblasConjTrans ) TR='C';
     57       else if ( Trans == CblasNoTrans )   TR='N';
     58       else
     59       {
     60          cblas_xerbla(3, "cblas_dsyr2k","Illegal Trans setting, %d\n", Trans);
     61          CBLAS_CallFromC = 0;
     62          RowMajorStrg = 0;
     63          return;
     64       }
     65 
     66 
     67       #ifdef F77_CHAR
     68          F77_UL = C2F_CHAR(&UL);
     69          F77_TR = C2F_CHAR(&TR);
     70       #endif
     71 
     72       F77_dsyr2k(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda,
     73                       B, &F77_ldb, &beta, C, &F77_ldc);
     74    } else if (Order == CblasRowMajor)
     75    {
     76       RowMajorStrg = 1;
     77       if( Uplo == CblasUpper) UL='L';
     78       else if ( Uplo == CblasLower ) UL='U';
     79       else
     80       {
     81          cblas_xerbla(3, "cblas_dsyr2k","Illegal Uplo setting, %d\n", Uplo);
     82          CBLAS_CallFromC = 0;
     83          RowMajorStrg = 0;
     84          return;
     85       }
     86       if( Trans == CblasTrans) TR ='N';
     87       else if ( Trans == CblasConjTrans ) TR='N';
     88       else if ( Trans == CblasNoTrans )   TR='T';
     89       else
     90       {
     91          cblas_xerbla(3, "cblas_dsyr2k","Illegal Trans setting, %d\n", Trans);
     92          CBLAS_CallFromC = 0;
     93          RowMajorStrg = 0;
     94          return;
     95       }
     96 
     97       #ifdef F77_CHAR
     98          F77_UL = C2F_CHAR(&UL);
     99          F77_TR = C2F_CHAR(&TR);
    100       #endif
    101 
    102       F77_dsyr2k(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda, B,
    103                 &F77_ldb, &beta, C, &F77_ldc);
    104    }
    105    else cblas_xerbla(1, "cblas_dsyr2k","Illegal Order setting, %d\n", Order);
    106    CBLAS_CallFromC = 0;
    107    RowMajorStrg = 0;
    108    return;
    109 }
    110