sger(3P) Sun Performance Library sger(3P)NAMEsger - perform the rank 1 operation A := alpha*x*y' + A
SYNOPSIS
SUBROUTINE SGER(M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
INTEGER M, N, INCX, INCY, LDA
REAL ALPHA
REAL X(*), Y(*), A(LDA,*)
SUBROUTINE SGER_64(M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
INTEGER*8 M, N, INCX, INCY, LDA
REAL ALPHA
REAL X(*), Y(*), A(LDA,*)
F95 INTERFACE
SUBROUTINE GER([M], [N], ALPHA, X, [INCX], Y, [INCY], A, [LDA])
INTEGER :: M, N, INCX, INCY, LDA
REAL :: ALPHA
REAL, DIMENSION(:) :: X, Y
REAL, DIMENSION(:,:) :: A
SUBROUTINE GER_64([M], [N], ALPHA, X, [INCX], Y, [INCY], A, [LDA])
INTEGER(8) :: M, N, INCX, INCY, LDA
REAL :: ALPHA
REAL, DIMENSION(:) :: X, Y
REAL, DIMENSION(:,:) :: A
C INTERFACE
#include <sunperf.h>
void sger(int m, int n, float alpha, float *x, int incx, float *y, int
incy, float *a, int lda);
void sger_64(long m, long n, float alpha, float *x, long incx, float
*y, long incy, float *a, long lda);
PURPOSEsger 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.
ARGUMENTS
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.
6 Mar 2009 sger(3P)