B::Asmdata(3pm) Perl Programmers Reference Guide B::Asmdata(3pm)

NAME
       B::Asmdata - Autogenerated data about Perl ops, used to generate byte-
       code

SYNOPSIS
               use B::Asmdata qw(%insndata @insnname @optype @specialsvname);

DESCRIPTION
       Provides information about Perl ops in order to generate bytecode via a
       bunch of exported variables.  Its mostly used by B::Assembler and
       B::Disassembler.

       %insndata
             my($bytecodenum, $putsub, $getmeth) = @$insndata{$opname};

           For a given $opname (for example, 'coplabel', 'svflags', etc...)
           you get an array ref containing the bytecode number of the op, a
           reference to the subroutine used to 'PUT', and the name of the
           method used to 'GET'.

       @insnname
             my $opname = $insnname[$bytecodenum];

           A simple mapping of the bytecode number to the name of the op.
           Suitable for using with %insndata like so:

             my $opinfo = $insndata{$insnname[$bytecodenum]};

       @optype
             my $optype = $optype[$optypenum];

           A simple mapping of the op type number to its type (like 'COP' or
           'BINOP').

       @specialsvname
             my $svname = $specialsvname[$svindex];

           Certain SV types are considered 'special'.  They're represented by
           B::SPECIAL and are referred to by a number from the specialsvlist.
           This array maps that number back to the name of the SV (like
           'Nullsv' or '&PLsvundef').

AUTHOR       Malcolm Beattie, "mbeattie@sable.ox.ac.uk"



perl v5.8.8                       2001-09-21                   B::Asmdata(3pm)