B::Asmdata

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



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

SYNOPSIS
               use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);

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.

       %insn_data
             my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name};

           For a given $op_name (for example, 'cop_label', 'sv_flags', 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'.

       @insn_name
             my $op_name = $insn_name[$bytecode_num];

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

             my $op_info = $insn_data{$insn_name[$bytecode_num]};

       @optype
             my $op_type = $optype[$op_type_num];

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

       @specialsv_name
             my $sv_name = $specialsv_name[$sv_index];

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

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



perl v5.8.6                       2001-09-21                     B::Asmdata(3)