zaxpy
zaxpy - compute y := alpha * x + y
SUBROUTINE ZAXPY( N, ALPHA, X, INCX, Y, INCY)
DOUBLE COMPLEX ALPHA
DOUBLE COMPLEX X(*), Y(*)
INTEGER N, INCX, INCY
SUBROUTINE ZAXPY_64( N, ALPHA, X, INCX, Y, INCY)
DOUBLE COMPLEX ALPHA
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 N, INCX, INCY
SUBROUTINE AXPY( [N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX(8) :: ALPHA
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
SUBROUTINE AXPY_64( [N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX(8) :: ALPHA
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: N, INCX, INCY
#include <sunperf.h>
void zaxpy(int n, doublecomplex alpha, doublecomplex *x, int incx, doublecomplex *y, int incy);
void zaxpy_64(long n, doublecomplex alpha, doublecomplex *x, long incx, doublecomplex *y, long incy);
zaxpy compute y := alpha * x + y
where alpha is a scalar and x and y are n-vectors.
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* N (input)
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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.
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* ALPHA (input)
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On entry, ALPHA specifies the scalar alpha. Unchanged on exit.
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* X (input)
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array of DIMENSION at least ( 1 + ( n - 1 )*abs( INCX ) ). Before entry, the incremented array X must contain the vector x. Unchanged on exit.
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* INCX (input)
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On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit.
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* Y (input/output)
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array of DIMENSION at least ( 1 + ( m - 1 )*abs( INCY ) ). On entry, the incremented array Y must contain the vector y. On exit, Y is overwritten by the updated vector y.
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* INCY (input)
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On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit.