Note: this is a BLAS routine and is not in libslatec.a
*DECK SGER
SUBROUTINE SGER (M, N, ALPHA, X, INCX, Y, INCY, A, LDA)
C***BEGIN PROLOGUE SGER
C***PURPOSE Perform rank 1 update of a real general matrix.
C***LIBRARY SLATEC (BLAS)
C***CATEGORY D1B4
C***TYPE SINGLE PRECISION (SGER-S)
C***KEYWORDS LEVEL 2 BLAS, LINEAR ALGEBRA
C***AUTHOR Dongarra, J. J., (ANL)
C Du Croz, J., (NAG)
C Hammarling, S., (NAG)
C Hanson, R. J., (SNLA)
C***DESCRIPTION
C
C SGER performs the rank 1 operation
C
C A := alpha*x*y' + A,
C
C where alpha is a scalar, x is an m element vector, y is an n element
C vector and A is an m by n matrix.
C
C Parameters
C ==========
C
C M - INTEGER.
C On entry, M specifies the number of rows of the matrix A.
C M must be at least zero.
C Unchanged on exit.
C
C N - INTEGER.
C On entry, N specifies the number of columns of the matrix A.
C N must be at least zero.
C Unchanged on exit.
C
C ALPHA - REAL .
C On entry, ALPHA specifies the scalar alpha.
C Unchanged on exit.
C
C X - REAL array of dimension at least
C ( 1 + ( m - 1)*abs( INCX)).
C Before entry, the incremented array X must contain the m
C element vector x.
C Unchanged on exit.
C
C INCX - INTEGER.
C On entry, INCX specifies the increment for the elements of
C X. INCX must not be zero.
C Unchanged on exit.
C
C Y - REAL array of dimension at least
C ( 1 + ( n - 1 )*abs( INCY ) ).
C Before entry, the incremented array Y must contain the n
C element vector y.
C Unchanged on exit.
C
C INCY - INTEGER.
C On entry, INCY specifies the increment for the elements of
C Y. INCY must not be zero.
C Unchanged on exit.
C
C A - REAL array of DIMENSION ( LDA, n ).
C Before entry, the leading m by n part of the array A must
C contain the matrix of coefficients. On exit, A is
C overwritten by the updated matrix.
C
C LDA - INTEGER.
C On entry, LDA specifies the first dimension of A as declared
C in the calling (sub) program. LDA must be at least
C max( 1, m ).
C Unchanged on exit.
C
C***REFERENCES Dongarra, J. J., Du Croz, J., Hammarling, S., and
C Hanson, R. J. An extended set of Fortran basic linear
C algebra subprograms. ACM TOMS, Vol. 14, No. 1,
C pp. 1-17, March 1988.
C***ROUTINES CALLED XERBLA
C***REVISION HISTORY (YYMMDD)
C 861022 DATE WRITTEN
C 910605 Modified to meet SLATEC prologue standards. Only comment
C lines were modified. (BKS)
C***END PROLOGUE SGER