zlarscl2 (l) - Linux Manuals

zlarscl2: performs a reciprocal diagonal scaling on an vector

NAME

ZLARSCL2 - performs a reciprocal diagonal scaling on an vector

SYNOPSIS

SUBROUTINE ZLARSCL2
( M, N, D, X, LDX )

    
IMPLICIT NONE

    
INTEGER M, N, LDX

    
COMPLEX*16 X( LDX, * )

    
DOUBLE PRECISION D( * )

PURPOSE

ZLARSCL2 performs a reciprocal diagonal scaling on an vector:
  x <-- inv(D) * x
where the diagonal matrix D is stored as a vector.
Eventually to be replaced by BLAS_sge_diag_scale in the new BLAS standard.

ARGUMENTS

The size of the vectors X and D.
D (input) DOUBLE PRECISION array, length N
Diagonal matrix D, stored as a vector of length N. X (input/output) COMPLEX*16 array, length N On entry, the vector X to be scaled by D. On exit, the scaled vector.

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