OpenBLAS/lapack-netlib/CBLAS/src/cblas_cher2.c at v0.3.23 · OpenMathLib/OpenBLAS · GitHub

Name: OpenBLAS/lapack-netlib/CBLAS/src/cblas_cher2.c at v0.3.23 · OpenMathLib/OpenBLAS · GitHub
Rating: 4.9 (4632 reviews)
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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"
voidcblas_cher2(constCBLAS_LAYOUTlayout, constCBLAS_UPLOUplo,
constintN, constvoid*alpha, constvoid*X, constintincX,
constvoid*Y, constintincY, void*A, constintlda)
{
charUL;
#ifdefF77_CHAR
F77_CHARF77_UL;
#else
#defineF77_UL &UL
#endif

#ifdefF77_INT
F77_INTF77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
#else
#defineF77_N N
#defineF77_lda lda
#defineF77_incX incx
#defineF77_incY incy
#endif
intn, 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;

externintCBLAS_CallFromC;
externintRowMajorStrg;
RowMajorStrg=0;

CBLAS_CallFromC=1;
if (layout==CblasColMajor)
 {
if (Uplo==CblasLower) UL='L';
elseif (Uplo==CblasUpper) UL='U';
else
 {
cblas_xerbla(2, "cblas_cher2","Illegal Uplo setting, %d\n",Uplo );
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
 }
#ifdefF77_CHAR
F77_UL=C2F_CHAR(&UL);
#endif

F77_cher2(F77_UL, &F77_N, alpha, X, &F77_incX,
Y, &F77_incY, A, &F77_lda);

 } elseif (layout==CblasRowMajor)
 {
RowMajorStrg=1;
if (Uplo==CblasUpper) UL='L';
elseif (Uplo==CblasLower) UL='U';
else
 {
cblas_xerbla(2, "cblas_cher2","Illegal Uplo setting, %d\n", Uplo);
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
 }
#ifdefF77_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;

#ifdefF77_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 layout setting, %d\n", layout);
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
 }
if(X!=x)
free(x);
if(Y!=y)
free(y);

CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
}