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.IX Title "B::Asmdata 3"
.TH B::Asmdata 3 "2002-11-24" "perl v5.8.0" "Perl Programmers Reference Guide"
.SH "NAME"
B::Asmdata \- Autogenerated data about Perl ops, used to generate bytecode
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&        use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);
.Ve
.SH "DESCRIPTION"
.IX Header "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.
.IP "%insn_data" 4
.IX Item "%insn_data"
.Vb 1
\&  my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name};
.Ve
.Sp
For a given \f(CW$op_name\fR (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 '\s-1PUT\s0', and the name of the method
used to '\s-1GET\s0'.
.IP "@insn_name" 4
.IX Item "@insn_name"
.Vb 1
\&  my $op_name = $insn_name[$bytecode_num];
.Ve
.Sp
A simple mapping of the bytecode number to the name of the op.
Suitable for using with \f(CW%insn_data\fR like so:
.Sp
.Vb 1
\&  my $op_info = $insn_data{$insn_name[$bytecode_num]};
.Ve
.IP "@optype" 4
.IX Item "@optype"
.Vb 1
\&  my $op_type = $optype[$op_type_num];
.Ve
.Sp
A simple mapping of the op type number to its type (like '\s-1COP\s0' or '\s-1BINOP\s0').
.IP "@specialsv_name" 4
.IX Item "@specialsv_name"
.Vb 1
\&  my $sv_name = $specialsv_name[$sv_index];
.Ve
.Sp
Certain \s-1SV\s0 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 \s-1SV\s0 (like 'Nullsv'
or '&PL_sv_undef').
.SH "AUTHOR"
.IX Header "AUTHOR"
Malcolm Beattie, \f(CW\*(C`mbeattie@sable.ox.ac.uk\*(C'\fR