ext::B::B::AsmdatPerl)Programmers Referenceext::B::B::Asmdata(3p)
B::Asmdata - Autogenerated data about Perl ops, used to gen-
erate bytecode
use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);
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
number from the specialsv_list. This array maps that
number back to the name of the SV (like 'Nullsv' or
'&PL_sv_undef').
Malcolm Beattie, "mbeattie@sable.ox.ac.uk"
perl v5.8.8 2005-02-05 1
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