Contents
drot - Apply a Given's rotation constructed by SROTG.
SUBROUTINE DROT(N, X, INCX, Y, INCY, C, S)
INTEGER N, INCX, INCY
DOUBLE PRECISION C, S
DOUBLE PRECISION X(*), Y(*)
SUBROUTINE DROT_64(N, X, INCX, Y, INCY, C, S)
INTEGER*8 N, INCX, INCY
DOUBLE PRECISION C, S
DOUBLE PRECISION X(*), Y(*)
F95 INTERFACE
SUBROUTINE ROT([N], X, [INCX], Y, [INCY], C, S)
INTEGER :: N, INCX, INCY
REAL(8) :: C, S
REAL(8), DIMENSION(:) :: X, Y
SUBROUTINE ROT_64([N], X, [INCX], Y, [INCY], C, S)
INTEGER(8) :: N, INCX, INCY
REAL(8) :: C, S
REAL(8), DIMENSION(:) :: X, Y
C INTERFACE
#include <sunperf.h>
void drot(int n, double *x, int incx, double *y, int incy,
double c, double s);
void drot_64(long n, double *x, long incx, double *y, long
incy, double c, double s);
drot Apply a Given's rotation constructed by SROTG.
N (input)
On entry, N specifies the number of elements in
the vector. N must be at least one for the sub-
routine to have any visible effect. Unchanged on
exit.
X (input/output)
( 1 + ( n - 1 )*abs( INCX ) ). Before entry, the
incremented array X must contain the vector x.
INCX (input)
On entry, INCX specifies the increment for the
elements of X. Unchanged on exit.
Y (input/output)
( 1 + ( n - 1 )*abs( INCY ) ). On entry, the
incremented array Y must contain the vector y. On
exit, Y is overwritten by the updated vector y.
INCY (input)
On entry, INCY specifies the increment for the
elements of Y. Unchanged on exit.
C (input) On entry, the C rotation value constructed by
SROTG. Unchanged on exit.
S (input) On entry, the S rotation value constructed by
SROTG. Unchanged on exit.