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/*
* cblas_ztbsv.c
* The program is a C interface to ztbsv.
*
* Keita Teranishi 3/23/98
*
*/
#include "cblas.h"
#include "cblas_f77.h"
void cblas_ztbsv(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
const enum CBLAS_TRANSPOSE TransA, const enum CBLAS_DIAG Diag,
const int N, const int K, const void *A, const int lda,
void *X, const int incX)
{
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_K=K, F77_incX=incX;
#else
#define F77_N N
#define F77_K K
#define F77_lda lda
#define F77_incX incX
#endif
int n, i=0, tincX;
double *st=0,*x=(double *)X;
extern int CBLAS_CallFromC;
extern int RowMajorStrg;
RowMajorStrg = 0;
CBLAS_CallFromC = 1;
if (order == CblasColMajor)
{
if (Uplo == CblasUpper) UL = 'U';
else if (Uplo == CblasLower) UL = 'L';
else
{
cblas_xerbla(2, "cblas_ztbsv","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
{
cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
if (Diag == CblasUnit) DI = 'U';
else if (Diag == CblasNonUnit) DI = 'N';
else
{
cblas_xerbla(4, "cblas_ztbsv","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_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
&F77_incX);
}
else if (order == CblasRowMajor)
{
RowMajorStrg = 1;
if (Uplo == CblasUpper) UL = 'L';
else if (Uplo == CblasLower) UL = 'U';
else
{
cblas_xerbla(2, "cblas_ztbsv","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
{
cblas_xerbla(3, "cblas_ztbsv","Illegal TransA setting, %d\n", TransA);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
if (Diag == CblasUnit) DI = 'U';
else if (Diag == CblasNonUnit) DI = 'N';
else
{
cblas_xerbla(4, "cblas_ztbsv","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_ztbsv( F77_UL, F77_TA, F77_DI, &F77_N, &F77_K, A, &F77_lda, X,
&F77_incX);
if (TransA == CblasConjTrans)
{
if (N > 0)
{
do
{
*x = -(*x);
x+= i;
}
while (x != st);
}
}
}
else cblas_xerbla(1, "cblas_ztbsv", "Illegal Order setting, %d\n", order);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
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