cblas_cherk.c

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/*
 *
 * cblas_cherk.c
 * This program is a C interface to cherk.
 * Written by Keita Teranishi
 * 4/8/1998
 *
 */
 
#include "cblas.h"
#include "cblas_f77.h"
void cblas_cherk(const CBLAS_LAYOUT layout, const CBLAS_UPLO Uplo,
                 const CBLAS_TRANSPOSE Trans, const CBLAS_INT N, const CBLAS_INT K,
                 const float alpha, const void *A, const CBLAS_INT lda,
                 const float beta, void *C, const CBLAS_INT ldc)
{
   char UL, TR;
#ifdef F77_CHAR
   F77_CHAR F77_TR, F77_UL;
#else
   #define F77_TR &TR
   #define F77_UL &UL
#endif
 
#ifdef F77_INT
   F77_INT F77_N=N, F77_K=K, F77_lda=lda;
   F77_INT F77_ldc=ldc;
#else
   #define F77_N N
   #define F77_K K
   #define F77_lda lda
   #define F77_ldc ldc
#endif
 
   extern int CBLAS_CallFromC;
   extern int RowMajorStrg;
   RowMajorStrg = 0;
   CBLAS_CallFromC = 1;
 
   if( layout == CblasColMajor )
   {
      if( Uplo == CblasUpper) UL='U';
      else if ( Uplo == CblasLower ) UL='L';
      else
      {
         cblas_xerbla(2, "cblas_cherk", "Illegal Uplo setting, %d\n", Uplo);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
 
      if( Trans == CblasTrans) TR ='T';
      else if ( Trans == CblasConjTrans ) TR='C';
      else if ( Trans == CblasNoTrans )   TR='N';
      else
      {
         cblas_xerbla(3, "cblas_cherk", "Illegal Trans setting, %d\n", Trans);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
 
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
         F77_TR = C2F_CHAR(&TR);
      #endif
 
      F77_cherk(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda,
                     &beta, C, &F77_ldc);
   } else if (layout == CblasRowMajor)
   {
      RowMajorStrg = 1;
      if( Uplo == CblasUpper) UL='L';
      else if ( Uplo == CblasLower ) UL='U';
      else
      {
         cblas_xerbla(3, "cblas_cherk", "Illegal Uplo setting, %d\n", Uplo);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      if( Trans == CblasTrans) TR ='N';
      else if ( Trans == CblasConjTrans ) TR='N';
      else if ( Trans == CblasNoTrans )   TR='C';
      else
      {
         cblas_xerbla(3, "cblas_cherk", "Illegal Trans setting, %d\n", Trans);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
 
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
         F77_SD = C2F_CHAR(&SD);
      #endif
 
      F77_cherk(F77_UL, F77_TR, &F77_N, &F77_K, &alpha, A, &F77_lda,
                &beta, C, &F77_ldc);
   }
   else  cblas_xerbla(1, "cblas_cherk", "Illegal layout setting, %d\n", layout);
   CBLAS_CallFromC = 0;
   RowMajorStrg = 0;
   return;
}