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/*
* cblas_cher2.c
* The program is a C interface to cher2.
*
* Keita Teranishi 3/23/98
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "cblas.h"
#include "cblas_f77.h"
void cblas_cher2(const enum CBLAS_ORDER order, const enum CBLAS_UPLO Uplo,
const int N, const void *alpha, const void *X, const int incX,
const void *Y, const int incY, void *A, const int lda)
{
char UL;
#ifdef F77_CHAR
F77_CHAR F77_UL;
#else
#define F77_UL &UL
#endif
#ifdef F77_INT
F77_INT F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
#else
#define F77_N N
#define F77_lda lda
#define F77_incX incx
#define F77_incY incy
#endif
int n, i, j, tincx, tincy, incx=incX, incy=incY;
float *x=(float *)X, *xx=(float *)X, *y=(float *)Y,
*yy=(float *)Y, *tx, *ty, *stx, *sty;
extern int CBLAS_CallFromC;
extern int RowMajorStrg;
RowMajorStrg = 0;
CBLAS_CallFromC = 1;
if (order == CblasColMajor)
{
if (Uplo == CblasLower) UL = 'L';
else if (Uplo == CblasUpper) UL = 'U';
else
{
cblas_xerbla(2, "cblas_cher2","Illegal Uplo setting, %d\n",Uplo );
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
#ifdef F77_CHAR
F77_UL = C2F_CHAR(&UL);
#endif
F77_cher2(F77_UL, &F77_N, alpha, X, &F77_incX,
Y, &F77_incY, A, &F77_lda);
} else if (order == CblasRowMajor)
{
RowMajorStrg = 1;
if (Uplo == CblasUpper) UL = 'L';
else if (Uplo == CblasLower) UL = 'U';
else
{
cblas_xerbla(2, "cblas_cher2","Illegal Uplo setting, %d\n", Uplo);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
#ifdef F77_CHAR
F77_UL = C2F_CHAR(&UL);
#endif
if (N > 0)
{
n = N << 1;
x = malloc(n*sizeof(float));
y = malloc(n*sizeof(float));
tx = x;
ty = y;
if( incX > 0 ) {
i = incX << 1 ;
tincx = 2;
stx= x+n;
} else {
i = incX *(-2);
tincx = -2;
stx = x-2;
x +=(n-2);
}
if( incY > 0 ) {
j = incY << 1;
tincy = 2;
sty= y+n;
} else {
j = incY *(-2);
tincy = -2;
sty = y-2;
y +=(n-2);
}
do
{
*x = *xx;
x[1] = -xx[1];
x += tincx ;
xx += i;
}
while (x != stx);
do
{
*y = *yy;
y[1] = -yy[1];
y += tincy ;
yy += j;
}
while (y != sty);
x=tx;
y=ty;
#ifdef F77_INT
F77_incX = 1;
F77_incY = 1;
#else
incx = 1;
incy = 1;
#endif
} else
{
x = (float *) X;
y = (float *) Y;
}
F77_cher2(F77_UL, &F77_N, alpha, y, &F77_incY, x,
&F77_incX, A, &F77_lda);
} else
{
cblas_xerbla(1, "cblas_cher2","Illegal Order setting, %d\n", order);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
if(X!=x)
free(x);
if(Y!=y)
free(y);
CBLAS_CallFromC = 0;
RowMajorStrg = 0;
return;
}
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