Contents
dger - perform the rank 1 operation A := alpha*x*y' + A
SUBROUTINE DGER(M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
INTEGER M, N, INCX, INCY, LDA
DOUBLE PRECISION ALPHA
DOUBLE PRECISION X(*), Y(*), A(LDA,*)
SUBROUTINE DGER_64(M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
INTEGER*8 M, N, INCX, INCY, LDA
DOUBLE PRECISION ALPHA
DOUBLE PRECISION X(*), Y(*), A(LDA,*)
F95 INTERFACE
SUBROUTINE GER([M], [N], ALPHA, X, [INCX], Y, [INCY], A, [LDA])
INTEGER :: M, N, INCX, INCY, LDA
REAL(8) :: ALPHA
REAL(8), DIMENSION(:) :: X, Y
REAL(8), DIMENSION(:,:) :: A
SUBROUTINE GER_64([M], [N], ALPHA, X, [INCX], Y, [INCY], A, [LDA])
INTEGER(8) :: M, N, INCX, INCY, LDA
REAL(8) :: ALPHA
REAL(8), DIMENSION(:) :: X, Y
REAL(8), DIMENSION(:,:) :: A
C INTERFACE
#include <sunperf.h>
void dger(int m, int n, double alpha, double *x, int incx,
double *y, int incy, double *a, int lda);
void dger_64(long m, long n, double alpha, double *x, long
incx, double *y, long incy, double *a, long lda);
dger performs the rank 1 operation A := alpha*x*y' + A,
where alpha is a scalar, x is an m element vector, y is an n
element vector and A is an m by n matrix.
M (input)
On entry, M specifies the number of rows of the
matrix A. M >= 0. Unchanged on exit.
N (input)
On entry, N specifies the number of columns of the
matrix A. N >= 0. Unchanged on exit.
ALPHA (input)
On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
X (input)
( 1 + ( m - 1 )*abs( INCX ) ). Before entry, the
incremented array X must contain the m element
vector x. Unchanged on exit.
INCX (input)
On entry, INCX specifies the increment for the
elements of X. INCX <> 0. Unchanged on exit.
Y (input)
( 1 + ( n - 1 )*abs( INCY ) ). Before entry, the
incremented array Y must contain the n element
vector y. Unchanged on exit.
INCY (input)
On entry, INCY specifies the increment for the
elements of Y. INCY <> 0. Unchanged on exit.
A (input/output)
Before entry, the leading m by n part of the array
A must contain the matrix of coefficients. On
exit, A is overwritten by the updated matrix.
LDA (input)
On entry, LDA specifies the first dimension of A
as declared in the calling (sub) program. LDA >=
max( 1, m ). Unchanged on exit.