Performs the rank 1 operation.
BLAS Library (libblas.a)
SUBROUTINE SGER(M, N, ALPHA, X, INCX, Y, INCY, A, LDA) REAL ALPHA INTEGER INCX,INCY,LDA,M,N REAL A(LDA,*), X(*), Y(*)
SUBROUTINE DGER(M, N, ALPHA, X, INCX, Y, INCY, A, LDA) DOUBLE PRECISION ALPHA INTEGER INCX,INCY,LDA,M,N DOUBLE PRECISION A(LDA,*), X(*), Y(*)
The SGER or DGER subroutine 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||On entry, M specifies the number of rows of the matrix A; M must be at least 0; unchanged on exit.|
|N||On entry, N specifies the number of columns of the matrix A; N must be at least 0; unchanged on exit.|
|ALPHA||On entry, ALPHA specifies the scalar alpha; unchanged on exit.|
|X||A vector of dimension at least (1 + (M-1) * abs(INCX) ); on entry, the incremented array X must contain the M element vector x; unchanged on exit.|
|INCX||On entry, INCX specifies the increment for the elements of X; INCX must not be 0; unchanged on exit.|
|Y||A vector of dimension at least (1 + (N-1) * abs(INCY) ); on entry, the incremented array Y must contain the N element vector y; unchanged on exit.|
|INCY||On entry, INCY specifies the increment for the elements of Y; INCY must not be 0; unchanged on exit.|
|A||An array of dimension ( LDA, N ); on 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||On entry, LDA specifies the first dimension of A as declared in the calling (sub) program; LDA must be at least max( 1, M ); unchanged on exit.|