ZGERC(1) BLAS routine ZGERC(1)NAME
ZGERC - performs the rank 1 operation A := alpha*x*conjg( y' ) + A,
SYNOPSIS
SUBROUTINE ZGERC(M,N,ALPHA,X,INCX,Y,INCY,A,LDA)
DOUBLE COMPLEX ALPHA
INTEGER INCX,INCY,LDA,M,N
DOUBLE COMPLEX
A(LDA,*),X(*),Y(*)
PURPOSE
ZGERC performs the rank 1 operation
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 - INTEGER.
On entry, M specifies the number of rows of the matrix A. M
must be at least zero. Unchanged on exit.
N - INTEGER.
On entry, N specifies the number of columns of the matrix A. N
must be at least zero. Unchanged on exit.
ALPHA - COMPLEX*16 .
On entry, ALPHA specifies the scalar alpha. Unchanged on exit.
X - COMPLEX*16 array of dimension at least
( 1 + ( m - 1 )*abs( INCX ) ). Before entry, the incremented
array X must contain the m element vector x. Unchanged on exit.
INCX - INTEGER.
On entry, INCX specifies the increment for the elements of X.
INCX must not be zero. Unchanged on exit.
Y - COMPLEX*16 array of dimension at least
( 1 + ( n - 1 )*abs( INCY ) ). Before entry, the incremented
array Y must contain the n element vector y. Unchanged on exit.
INCY - INTEGER.
On entry, INCY specifies the increment for the elements of Y.
INCY must not be zero. Unchanged on exit.
A - COMPLEX*16 array of DIMENSION ( LDA, n ).
Before entry, the leading m by n part of the array A must con‐
tain the matrix of coefficients. On exit, A is overwritten by
the updated matrix.
LDA - INTEGER.
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.
FURTHER DETAILS
Level 2 Blas routine.
-- Written on 22-October-1986.
Jack Dongarra, Argonne National Lab.
Jeremy Du Croz, Nag Central Office.
Sven Hammarling, Nag Central Office.
Richard Hanson, Sandia National Labs.
BLAS routine November 2008 ZGERC(1)
