psb_precaply -- Preconditioner application routine

ifstarssyntaxsyntaxcall psb_precaplyprec,x,y,desc_a,info,trans,work ifstarssyntaxsyntax*call psb_precaplyprec,x,desc_a,info,trans

Type:

Synchronous.

On Entry

prec

the preconditioner. Scope: local
Type: required
Intent: in.
Specified as: a preconditioner data structure precdatapsb_prec_type.

x

the source vector. Scope: local
Type: required
Intent: inout.
Specified as: a double precision array.

desc_a

the problem communication descriptor. Scope: local
Type: required
Intent: in.
Specified as: a communication data structure descdatapsb_desc_type.

trans

Scope:
Type: optional
Intent: in.
Specified as: a character.

work

an optional work space Scope: local
Type: optional
Intent: inout.
Specified as: a double precision array.

On Return

y

the destination vector. Scope: local
Type: required
Intent: inout.
Specified as: a double precision array.

info

Error code.
Scope: local
Type: required
Intent: out.
An integer value; 0 means no error has been detected.