caxpy - compute y := alpha * x + y
SUBROUTINE CAXPY( N, ALPHA, X, INCX, Y, INCY)
COMPLEX ALPHA
COMPLEX X(*), Y(*)
INTEGER N, INCX, INCY
SUBROUTINE CAXPY_64( N, ALPHA, X, INCX, Y, INCY)
COMPLEX ALPHA
COMPLEX X(*), Y(*)
INTEGER*8 N, INCX, INCY
SUBROUTINE AXPY( [N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX :: ALPHA
COMPLEX, DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
SUBROUTINE AXPY_64( [N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX :: ALPHA
COMPLEX, DIMENSION(:) :: X, Y
INTEGER(8) :: N, INCX, INCY
#include <sunperf.h>
void caxpy(int n, complex alpha, complex *x, int incx, complex *y, int incy);
void caxpy_64(long n, complex alpha, complex *x, long incx, complex *y, long incy);
caxpy compute y := alpha * x + y
where alpha is a scalar and x and y are n-vectors.
- 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.
- ALPHA (input)
On entry, ALPHA specifies the scalar alpha. Unchanged on exit.
- X (input)
array of DIMENSION at least ( 1 + ( n - 1 )*abs( INCX ) ). Before entry, the incremented array X must contain the vector x. Unchanged on exit.
- INCX (input)
On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit.
- Y (input/output)
array of DIMENSION at least ( 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.