cblas_ztrsv()

void API_SUFFIX cblas_ztrsv	(	const CBLAS_LAYOUT	layout,
		const CBLAS_UPLO	Uplo,
		const CBLAS_TRANSPOSE	TransA,
		const CBLAS_DIAG	Diag,
		const CBLAS_INT	N,
		const void *	A,
		const CBLAS_INT	lda,
		void *	X,
		const CBLAS_INT	incX )

Definition at line 10 of file cblas_ztrsv.c.

{
   char TA;
   char UL;
   char DI;
#ifdef F77_CHAR
   F77_CHAR F77_TA, F77_UL, F77_DI;
#else
   #define F77_TA &TA
   #define F77_UL &UL
   #define F77_DI &DI
#endif
#ifdef F77_INT
   F77_INT F77_N=N, F77_lda=lda, F77_incX=incX;
#else
   #define F77_N N
   #define F77_lda lda
   #define F77_incX incX
#endif
   CBLAS_INT n, i=0, tincX;
   double *st=0,*x=(double *)X;
   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
      {
         API_SUFFIX(cblas_xerbla)(2, "cblas_ztrsv","Illegal Uplo setting, %d\n", Uplo);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      if (TransA == CblasNoTrans) TA = 'N';
      else if (TransA == CblasTrans) TA = 'T';
      else if (TransA == CblasConjTrans) TA = 'C';
      else
      {
         API_SUFFIX(cblas_xerbla)(3, "cblas_ztrsv","Illegal TransA setting, %d\n", TransA);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      if (Diag == CblasUnit) DI = 'U';
      else if (Diag == CblasNonUnit) DI = 'N';
      else
      {
         API_SUFFIX(cblas_xerbla)(4, "cblas_ztrsv","Illegal Diag setting, %d\n", Diag);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
         F77_TA = C2F_CHAR(&TA);
         F77_DI = C2F_CHAR(&DI);
      #endif
      F77_ztrsv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
                      &F77_incX);
   }
   else if (layout == CblasRowMajor)
   {
      RowMajorStrg = 1;
      if (Uplo == CblasUpper) UL = 'L';
      else if (Uplo == CblasLower) UL = 'U';
      else
      {
         API_SUFFIX(cblas_xerbla)(2, "cblas_ztrsv","Illegal Uplo setting, %d\n", Uplo);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
 
      if (TransA == CblasNoTrans) TA = 'T';
      else if (TransA == CblasTrans) TA = 'N';
      else if (TransA == CblasConjTrans)
      {
         TA = 'N';
         if ( N > 0)
         {
            if ( incX > 0 )
               tincX = incX;
            else
               tincX = -incX;
 
            n = N*2*(tincX);
            x++;
            st=x+n;
            i = tincX << 1;
            do
            {
               *x = -(*x);
               x+=i;
            }
            while (x != st);
            x -= n;
         }
      }
      else
      {
         API_SUFFIX(cblas_xerbla)(3, "cblas_ztrsv","Illegal TransA setting, %d\n", TransA);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
 
      if (Diag == CblasUnit) DI = 'U';
      else if (Diag == CblasNonUnit) DI = 'N';
      else
      {
         API_SUFFIX(cblas_xerbla)(4, "cblas_ztrsv","Illegal Diag setting, %d\n", Diag);
         CBLAS_CallFromC = 0;
         RowMajorStrg = 0;
         return;
      }
      #ifdef F77_CHAR
         F77_UL = C2F_CHAR(&UL);
         F77_TA = C2F_CHAR(&TA);
         F77_DI = C2F_CHAR(&DI);
      #endif
      F77_ztrsv( F77_UL, F77_TA, F77_DI, &F77_N, A, &F77_lda, X,
                      &F77_incX);
      if (TransA == CblasConjTrans)
      {
         if (N > 0)
         {
            do
            {
               *x = -(*x);
               x += i;
            }
            while (x != st);
         }
      }
   }
   else API_SUFFIX(cblas_xerbla)(1, "cblas_ztrsv", "Illegal layout setting, %d\n", layout);
   CBLAS_CallFromC = 0;
   RowMajorStrg = 0;
   return;
}

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