Man Pages

B::Asmdata - phpMan B::Asmdata - phpMan

Command: man perldoc info search(apropos)  


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



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

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 referred to by a num-
           ber 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, "mbeattieATsable.uk"



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