zdrot(3P) Sun Performance Library zdrot(3P)NAMEzdrot - Apply a plane rotation.
SYNOPSIS
SUBROUTINE ZDROT(N, X, INCX, Y, INCY, C, S)
DOUBLE PRECISION C, S
DOUBLE COMPLEX X(*), Y(*)
INTEGER N, INCX, INCY
SUBROUTINE ZDROT_64(N, X, INCX, Y, INCY, C, S)
DOUBLE PRECISION C, S
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 N, INCX, INCY
F95 INTERFACE
SUBROUTINE ROT([N], X, [INCX], Y, [INCY], C, S)
REAL(8) :: C, S
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
SUBROUTINE ROT_64([N], X, [INCX], Y, [INCY], C, S)
REAL(8) :: C, S
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: N, INCX, INCY
C INTERFACE
#include <sunperf.h>
void zdrot(int n, doublecomplex *x, int incx, doublecomplex *y, int
incy, double c, double s);
void zdrot_64(long n, doublecomplex *x, long incx, doublecomplex *y,
long incy, double c, double s);
PURPOSEzdrot Apply a plane rotation, where the cos and sin (c and s) are real
and the vectors x and y are complex.
ARGUMENTS
N (input)
On entry, N specifies the number of elements in the vector.
N must be at least one for the subroutine to have any visible
effect. Unchanged on exit.
X (input/output), dimension (1+(N-1)*abs(INCX))
On entry, the incremented array X must contain the vector
x. On exit, X is overwritten by the updated vector x.
INCX (input)
On entry, INCX specifies the increment for the elements
of X. INCX must not be zero. Unchanged on exit.
Y (input/output), dimension (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. INCY must not be zero. Unchanged on exit.
C (input)
On entry, the cosine. Unchanged on exit.
S (input)
On entry, the sin. Unchanged on exit.
6 Mar 2009 zdrot(3P)
