staticperl/perl/bytecode.pl

BEGIN {
  push @INC, './lib';
  require 'regen_lib.pl';
}
use strict;
my %alias_to = (
    U32 => [qw(line_t)],
    PADOFFSET => [qw(STRLEN SSize_t)],
    U16 => [qw(OPCODE short)],
    U8  => [qw(char)],
);

my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);

# Nullsv *must* come first in the following so that the condition
# ($$sv == 0) can continue to be used to test (sv == Nullsv).
my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE);

my (%alias_from, $from, $tos);
while (($from, $tos) = each %alias_to) {
    map { $alias_from{$_} = $from } @$tos;
}

my $c_header = <<'EOT';
/*
 *      Copyright (c) 1996-1999 Malcolm Beattie
 *
 *      You may distribute under the terms of either the GNU General Public
 *      License or the Artistic License, as specified in the README file.
 *
 */
/*
 * This file is autogenerated from bytecode.pl. Changes made here will be lost.
 */
EOT

my $perl_header;
($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;

safer_unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";

#
# Start with boilerplate for Asmdata.pm
#
open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
binmode ASMDATA_PM;
print ASMDATA_PM $perl_header, <<'EOT';
package B::Asmdata;

our $VERSION = '1.01';

use Exporter;
@ISA = qw(Exporter);
@EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
our(%insn_data, @insn_name, @optype, @specialsv_name);

EOT
print ASMDATA_PM <<"EOT";
\@optype = qw(@optype);
\@specialsv_name = qw(@specialsv);

# XXX insn_data is initialised this way because with a large
# %insn_data = (foo => [...], bar => [...], ...) initialiser
# I get a hard-to-track-down stack underflow and segfault.
EOT

#
# Boilerplate for byterun.c
#
open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
binmode BYTERUN_C;
print BYTERUN_C $c_header, <<'EOT';

#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#define NO_XSLOCKS
#include "XSUB.h"

#include "byterun.h"
#include "bytecode.h"


static const int optype_size[] = {
EOT
my $i = 0;
for ($i = 0; $i < @optype - 1; $i++) {
    printf BYTERUN_C "    sizeof(%s),\n", $optype[$i], $i;
}
printf BYTERUN_C "    sizeof(%s)\n", $optype[$i], $i;
print BYTERUN_C <<'EOT';
};

void *
bset_obj_store(pTHX_ struct byteloader_state *bstate, void *obj, I32 ix)
{
    if (ix > bstate->bs_obj_list_fill) {
        Renew(bstate->bs_obj_list, ix + 32, void*);
        bstate->bs_obj_list_fill = ix + 31;
    }
    bstate->bs_obj_list[ix] = obj;
    return obj;
}

int
byterun(pTHX_ register struct byteloader_state *bstate)
{
    register int insn;
    U32 ix;
    SV *specialsv_list[6];

    BYTECODE_HEADER_CHECK;      /* croak if incorrect platform */
    New(666, bstate->bs_obj_list, 32, void*); /* set op objlist */
    bstate->bs_obj_list_fill = 31;
    bstate->bs_obj_list[0] = NULL; /* first is always Null */
    bstate->bs_ix = 1;

EOT

for my $i ( 0 .. $#specialsv ) {
    print BYTERUN_C "    specialsv_list[$i] = $specialsv[$i];\n";
}

print BYTERUN_C <<'EOT';

    while ((insn = BGET_FGETC()) != EOF) {
        switch (insn) {
EOT


my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);

while (<DATA>) {
    if (/^\s*#/) {
        print BYTERUN_C if /^\s*#\s*(?:if|endif|el)/;
        next;
    }
    chop;
    next unless length;
    if (/^%number\s+(.*)/) {
        $insn_num = $1;
        next;
    } elsif (/%enum\s+(.*?)\s+(.*)/) {
        create_enum($1, $2);    # must come before instructions
        next;
    }
    ($insn, $lvalue, $argtype, $flags) = split;
    my $rvalcast = '';
    if ($argtype =~ m:(.+)/(.+):) {
        ($rvalcast, $argtype) = ("($1)", $2);
    }
    $insn_name[$insn_num] = $insn;
    $fundtype = $alias_from{$argtype} || $argtype;

    #
    # Add the case statement and code for the bytecode interpreter in byterun.c
    #
    printf BYTERUN_C "\t  case INSN_%s:\t\t/* %d */\n\t    {\n",
        uc($insn), $insn_num;
    my $optarg = $argtype eq "none" ? "" : ", arg";
    if ($optarg) {
        printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
    }
    if ($flags =~ /x/) {
        print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
    } elsif ($flags =~ /s/) {
        # Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
        print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
    }
    elsif ($optarg && $lvalue ne "none") {
        print BYTERUN_C "\t\t$lvalue = ${rvalcast}arg;\n";
    }
    print BYTERUN_C "\t\tbreak;\n\t    }\n";

    #
    # Add the initialiser line for %insn_data in Asmdata.pm
    #
    print ASMDATA_PM <<"EOT";
\$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
EOT

    # Find the next unused instruction number
    do { $insn_num++ } while $insn_name[$insn_num];
}

#
# Finish off byterun.c
#
print BYTERUN_C <<'EOT';
          default:
            Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
            /* NOTREACHED */
        }
    }
    return 0;
}
EOT

#
# Write the instruction and optype enum constants into byterun.h
#
open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
binmode BYTERUN_H;
print BYTERUN_H $c_header, <<'EOT';
struct byteloader_fdata {
    SV  *datasv;
    int next_out;
    int idx;
};

struct byteloader_state {
    struct byteloader_fdata     *bs_fdata;
    SV                          *bs_sv;
    void                        **bs_obj_list;
    int                         bs_obj_list_fill;
    int                         bs_ix;
    XPV                         bs_pv;
    int                         bs_iv_overflows;
};

int bl_getc(struct byteloader_fdata *);
int bl_read(struct byteloader_fdata *, char *, size_t, size_t);
extern int byterun(pTHX_ struct byteloader_state *);

enum {
EOT

my $add_enum_value = 0;
my $max_insn;
for $i ( 0 .. $#insn_name ) {
    $insn = uc($insn_name[$i]);
    if (defined($insn)) {
        $max_insn = $i;
        if ($add_enum_value) {
            print BYTERUN_H "    INSN_$insn = $i,\t\t\t/* $i */\n";
            $add_enum_value = 0;
        } else {
            print BYTERUN_H "    INSN_$insn,\t\t\t/* $i */\n";
        }
    } else {
        $add_enum_value = 1;
    }
}

print BYTERUN_H "    MAX_INSN = $max_insn\n};\n";

print BYTERUN_H "\nenum {\n";
for ($i = 0; $i < @optype - 1; $i++) {
    printf BYTERUN_H "    OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
}
printf BYTERUN_H "    OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;

#
# Finish off insn_data and create array initialisers in Asmdata.pm
#
print ASMDATA_PM <<'EOT';

my ($insn_name, $insn_data);
while (($insn_name, $insn_data) = each %insn_data) {
    $insn_name[$insn_data->[0]] = $insn_name;
}
# Fill in any gaps
@insn_name = map($_ || "unused", @insn_name);

1;

__END__

=head1 NAME

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

=head1 SYNOPSIS

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

=head1 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.

=over 4

=item %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'.

=for _private
Add more detail about what $put_sub and $get_meth are and how to use them.

=item @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]};

=item @optype

  my $op_type = $optype[$op_type_num];

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

=item @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').

=back

=head1 AUTHOR

Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>

=cut
EOT


close ASMDATA_PM or die "Error closing ASMDATA_PM: $!";
close BYTERUN_H or die "Error closing BYTERUN_H: $!";
close BYTERUN_C or die "Error closing BYTERUN_C: $!";

__END__
# First set instruction ord("#") to read comment to end-of-line (sneaky)
%number 35
comment         arg                     comment_t
# Then make ord("\n") into a no-op
%number 10
nop             none                    none

# Now for the rest of the ordinary ones, beginning with \0 which is
# ret so that \0-terminated strings can be read properly as bytecode.
%number 0
#
# The argtype is either a single type or "rightvaluecast/argtype".
#
#opcode         lvalue                                  argtype         flags   
#
ret             none                                    none            x
ldsv            bstate->bs_sv                           svindex
ldop            PL_op                                   opindex
stsv            bstate->bs_sv                           U32             s
stop            PL_op                                   U32             s
stpv            bstate->bs_pv.xpv_pv                    U32             x
ldspecsv        bstate->bs_sv                           U8              x
ldspecsvx       bstate->bs_sv                           U8              x
newsv           bstate->bs_sv                           U8              x
newsvx          bstate->bs_sv                           U32             x
newop           PL_op                                   U8              x
newopx          PL_op                                   U16             x
newopn          PL_op                                   U8              x
newpv           none                                    PV
pv_cur          bstate->bs_pv.xpv_cur                   STRLEN
pv_free         bstate->bs_pv                           none            x
sv_upgrade      bstate->bs_sv                           U8              x
sv_refcnt       SvREFCNT(bstate->bs_sv)                 U32
sv_refcnt_add   SvREFCNT(bstate->bs_sv)                 I32             x
sv_flags        SvFLAGS(bstate->bs_sv)                  U32
xrv             SvRV(bstate->bs_sv)                     svindex
xpv             bstate->bs_sv                           none            x
xpv_cur         SvCUR(bstate->bs_sv)                    STRLEN
xpv_len         SvLEN(bstate->bs_sv)                    STRLEN
xiv             SvIVX(bstate->bs_sv)                    IV
xnv             SvNVX(bstate->bs_sv)                    NV
xlv_targoff     LvTARGOFF(bstate->bs_sv)                STRLEN
xlv_targlen     LvTARGLEN(bstate->bs_sv)                STRLEN
xlv_targ        LvTARG(bstate->bs_sv)                   svindex
xlv_type        LvTYPE(bstate->bs_sv)                   char
xbm_useful      BmUSEFUL(bstate->bs_sv)                 I32
xbm_previous    BmPREVIOUS(bstate->bs_sv)               U16
xbm_rare        BmRARE(bstate->bs_sv)                   U8
xfm_lines       FmLINES(bstate->bs_sv)                  IV
xio_lines       IoLINES(bstate->bs_sv)                  IV
xio_page        IoPAGE(bstate->bs_sv)                   IV
xio_page_len    IoPAGE_LEN(bstate->bs_sv)               IV
xio_lines_left  IoLINES_LEFT(bstate->bs_sv)             IV
xio_top_name    IoTOP_NAME(bstate->bs_sv)               pvindex
xio_top_gv      *(SV**)&IoTOP_GV(bstate->bs_sv)         svindex
xio_fmt_name    IoFMT_NAME(bstate->bs_sv)               pvindex
xio_fmt_gv      *(SV**)&IoFMT_GV(bstate->bs_sv)         svindex
xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv)            pvindex
xio_bottom_gv   *(SV**)&IoBOTTOM_GV(bstate->bs_sv)      svindex
xio_subprocess  IoSUBPROCESS(bstate->bs_sv)             short
xio_type        IoTYPE(bstate->bs_sv)                   char
xio_flags       IoFLAGS(bstate->bs_sv)                  char
xcv_xsubany     *(SV**)&CvXSUBANY(bstate->bs_sv).any_ptr        svindex
xcv_stash       *(SV**)&CvSTASH(bstate->bs_sv)          svindex
xcv_start       CvSTART(bstate->bs_sv)                  opindex
xcv_root        CvROOT(bstate->bs_sv)                   opindex
xcv_gv          *(SV**)&CvGV(bstate->bs_sv)             svindex
xcv_file        CvFILE(bstate->bs_sv)                   pvindex
xcv_depth       CvDEPTH(bstate->bs_sv)                  long
xcv_padlist     *(SV**)&CvPADLIST(bstate->bs_sv)        svindex
xcv_outside     *(SV**)&CvOUTSIDE(bstate->bs_sv)        svindex
xcv_outside_seq CvOUTSIDE_SEQ(bstate->bs_sv)            U32
xcv_flags       CvFLAGS(bstate->bs_sv)                  U16
av_extend       bstate->bs_sv                           SSize_t         x
av_pushx        bstate->bs_sv                           svindex         x
av_push         bstate->bs_sv                           svindex         x
xav_fill        AvFILLp(bstate->bs_sv)                  SSize_t
xav_max         AvMAX(bstate->bs_sv)                    SSize_t
xav_flags       AvFLAGS(bstate->bs_sv)                  U8
xhv_riter       HvRITER(bstate->bs_sv)                  I32
xhv_name        HvNAME(bstate->bs_sv)                   pvindex
xhv_pmroot      *(OP**)&HvPMROOT(bstate->bs_sv)         opindex
hv_store        bstate->bs_sv                           svindex         x
sv_magic        bstate->bs_sv                           char            x
mg_obj          SvMAGIC(bstate->bs_sv)->mg_obj          svindex
mg_private      SvMAGIC(bstate->bs_sv)->mg_private      U16
mg_flags        SvMAGIC(bstate->bs_sv)->mg_flags        U8
mg_name         SvMAGIC(bstate->bs_sv)                  pvcontents      x
mg_namex        SvMAGIC(bstate->bs_sv)                  svindex         x
xmg_stash       *(SV**)&SvSTASH(bstate->bs_sv)          svindex
gv_fetchpv      bstate->bs_sv                           strconst        x
gv_fetchpvx     bstate->bs_sv                           strconst        x
gv_stashpv      bstate->bs_sv                           strconst        x
gv_stashpvx     bstate->bs_sv                           strconst        x
gp_sv           GvSV(bstate->bs_sv)                     svindex
gp_refcnt       GvREFCNT(bstate->bs_sv)                 U32
gp_refcnt_add   GvREFCNT(bstate->bs_sv)                 I32             x
gp_av           *(SV**)&GvAV(bstate->bs_sv)             svindex
gp_hv           *(SV**)&GvHV(bstate->bs_sv)             svindex
gp_cv           *(SV**)&GvCV(bstate->bs_sv)             svindex
gp_file         GvFILE(bstate->bs_sv)                   pvindex
gp_io           *(SV**)&GvIOp(bstate->bs_sv)            svindex
gp_form         *(SV**)&GvFORM(bstate->bs_sv)           svindex
gp_cvgen        GvCVGEN(bstate->bs_sv)                  U32
gp_line         GvLINE(bstate->bs_sv)                   line_t
gp_share        bstate->bs_sv                           svindex         x
xgv_flags       GvFLAGS(bstate->bs_sv)                  U8
op_next         PL_op->op_next                          opindex
op_sibling      PL_op->op_sibling                       opindex
op_ppaddr       PL_op->op_ppaddr                        strconst        x
op_targ         PL_op->op_targ                          PADOFFSET
op_type         PL_op                                   OPCODE          x
op_seq          PL_op->op_seq                           U16
op_flags        PL_op->op_flags                         U8
op_private      PL_op->op_private                       U8
op_first        cUNOP->op_first                         opindex
op_last         cBINOP->op_last                         opindex
op_other        cLOGOP->op_other                        opindex
op_pmreplroot   cPMOP->op_pmreplroot                    opindex
op_pmreplstart  cPMOP->op_pmreplstart                   opindex
op_pmnext       *(OP**)&cPMOP->op_pmnext                opindex
#ifdef USE_ITHREADS
op_pmstashpv    cPMOP                                   pvindex         x
op_pmreplrootpo cPMOP->op_pmreplroot                    OP*/PADOFFSET
#else
op_pmstash      *(SV**)&cPMOP->op_pmstash               svindex
op_pmreplrootgv *(SV**)&cPMOP->op_pmreplroot            svindex
#endif
pregcomp        PL_op                                   pvcontents      x
op_pmflags      cPMOP->op_pmflags                       U16
op_pmpermflags  cPMOP->op_pmpermflags                   U16
op_pmdynflags   cPMOP->op_pmdynflags                    U8
op_sv           cSVOP->op_sv                            svindex
op_padix        cPADOP->op_padix                        PADOFFSET
op_pv           cPVOP->op_pv                            pvcontents
op_pv_tr        cPVOP->op_pv                            op_tr_array
op_redoop       cLOOP->op_redoop                        opindex
op_nextop       cLOOP->op_nextop                        opindex
op_lastop       cLOOP->op_lastop                        opindex
cop_label       cCOP->cop_label                         pvindex
#ifdef USE_ITHREADS
cop_stashpv     cCOP                                    pvindex         x
cop_file        cCOP                                    pvindex         x
#else
cop_stash       cCOP                                    svindex         x
cop_filegv      cCOP                                    svindex         x
#endif
cop_seq         cCOP->cop_seq                           U32
cop_arybase     cCOP->cop_arybase                       I32
cop_line        cCOP->cop_line                          line_t
cop_io          cCOP->cop_io                            svindex
cop_warnings    cCOP->cop_warnings                      svindex
main_start      PL_main_start                           opindex
main_root       PL_main_root                            opindex
main_cv         *(SV**)&PL_main_cv                      svindex
curpad          PL_curpad                               svindex         x
push_begin      PL_beginav                              svindex         x
push_init       PL_initav                               svindex         x
push_end        PL_endav                                svindex         x
curstash        *(SV**)&PL_curstash                     svindex
defstash        *(SV**)&PL_defstash                     svindex
data            none                                    U8              x
incav           *(SV**)&GvAV(PL_incgv)                  svindex
load_glob       none                                    svindex         x
#ifdef USE_ITHREADS
regex_padav     *(SV**)&PL_regex_padav                  svindex
#endif
dowarn          PL_dowarn                               U8
comppad_name    *(SV**)&PL_comppad_name                 svindex
xgv_stash       *(SV**)&GvSTASH(bstate->bs_sv)          svindex
signal          bstate->bs_sv                           strconst        x
# to be removed
formfeed        PL_formfeed                             svindex
Revision:	1.1
Committed:	Thu Jun 30 14:26:41 2005 UTC (21 years, 2 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	PERL-5-8-7, HEAD
Branch point for:	PERL
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	BEGIN {
2			push @INC, './lib';
3			require 'regen_lib.pl';
4			}
5			use strict;
6			my %alias_to = (
7			U32 => [qw(line_t)],
8			PADOFFSET => [qw(STRLEN SSize_t)],
9			U16 => [qw(OPCODE short)],
10			U8 => [qw(char)],
11			);
12
13			my @optype= qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
14
15			# Nullsv must come first in the following so that the condition
16			# ($$sv == 0) can continue to be used to test (sv == Nullsv).
17			my @specialsv = qw(Nullsv &PL_sv_undef &PL_sv_yes &PL_sv_no pWARN_ALL pWARN_NONE);
18
19			my (%alias_from, $from, $tos);
20			while (($from, $tos) = each %alias_to) {
21			map { $alias_from{$_} = $from } @$tos;
22			}
23
24			my $c_header = <<'EOT';
25			/*
26			* Copyright (c) 1996-1999 Malcolm Beattie
27			*
28			* You may distribute under the terms of either the GNU General Public
29			* License or the Artistic License, as specified in the README file.
30			*
31			*/
32			/*
33			* This file is autogenerated from bytecode.pl. Changes made here will be lost.
34			*/
35			EOT
36
37			my $perl_header;
38			($perl_header = $c_header) =~ s{[/ ]?\*/?}{#}g;
39
40			safer_unlink "ext/ByteLoader/byterun.c", "ext/ByteLoader/byterun.h", "ext/B/B/Asmdata.pm";
41
42			#
43			# Start with boilerplate for Asmdata.pm
44			#
45			open(ASMDATA_PM, ">ext/B/B/Asmdata.pm") or die "ext/B/B/Asmdata.pm: $!";
46			binmode ASMDATA_PM;
47			print ASMDATA_PM $perl_header, <<'EOT';
48			package B::Asmdata;
49
50			our $VERSION = '1.01';
51
52			use Exporter;
53			@ISA = qw(Exporter);
54			@EXPORT_OK = qw(%insn_data @insn_name @optype @specialsv_name);
55			our(%insn_data, @insn_name, @optype, @specialsv_name);
56
57			EOT
58			print ASMDATA_PM <<"EOT";
59			\@optype = qw(@optype);
60			\@specialsv_name = qw(@specialsv);
61
62			# XXX insn_data is initialised this way because with a large
63			# %insn_data = (foo => [...], bar => [...], ...) initialiser
64			# I get a hard-to-track-down stack underflow and segfault.
65			EOT
66
67			#
68			# Boilerplate for byterun.c
69			#
70			open(BYTERUN_C, ">ext/ByteLoader/byterun.c") or die "ext/ByteLoader/byterun.c: $!";
71			binmode BYTERUN_C;
72			print BYTERUN_C $c_header, <<'EOT';
73
74			#define PERL_NO_GET_CONTEXT
75			#include "EXTERN.h"
76			#include "perl.h"
77			#define NO_XSLOCKS
78			#include "XSUB.h"
79
80			#include "byterun.h"
81			#include "bytecode.h"
82
83
84			static const int optype_size[] = {
85			EOT
86			my $i = 0;
87			for ($i = 0; $i < @optype - 1; $i++) {
88			printf BYTERUN_C " sizeof(%s),\n", $optype[$i], $i;
89			}
90			printf BYTERUN_C " sizeof(%s)\n", $optype[$i], $i;
91			print BYTERUN_C <<'EOT';
92			};
93
94			void *
95			bset_obj_store(pTHX_ struct byteloader_state bstate, void obj, I32 ix)
96			{
97			if (ix > bstate->bs_obj_list_fill) {
98			Renew(bstate->bs_obj_list, ix + 32, void*);
99			bstate->bs_obj_list_fill = ix + 31;
100			}
101			bstate->bs_obj_list[ix] = obj;
102			return obj;
103			}
104
105			int
106			byterun(pTHX_ register struct byteloader_state *bstate)
107			{
108			register int insn;
109			U32 ix;
110			SV *specialsv_list[6];
111
112			BYTECODE_HEADER_CHECK; /* croak if incorrect platform */
113			New(666, bstate->bs_obj_list, 32, void); / set op objlist */
114			bstate->bs_obj_list_fill = 31;
115			bstate->bs_obj_list[0] = NULL; /* first is always Null */
116			bstate->bs_ix = 1;
117
118			EOT
119
120			for my $i ( 0 .. $#specialsv ) {
121			print BYTERUN_C " specialsv_list[$i] = $specialsv[$i];\n";
122			}
123
124			print BYTERUN_C <<'EOT';
125
126			while ((insn = BGET_FGETC()) != EOF) {
127			switch (insn) {
128			EOT
129
130
131			my (@insn_name, $insn_num, $insn, $lvalue, $argtype, $flags, $fundtype);
132
133			while (<DATA>) {
134			if (/^\s*#/) {
135			print BYTERUN_C if /^\s#\s(?:if\|endif\|el)/;
136			next;
137			}
138			chop;
139			next unless length;
140			if (/^%number\s+(.*)/) {
141			$insn_num = $1;
142			next;
143			} elsif (/%enum\s+(.?)\s+(.)/) {
144			create_enum($1, $2); # must come before instructions
145			next;
146			}
147			($insn, $lvalue, $argtype, $flags) = split;
148			my $rvalcast = '';
149			if ($argtype =~ m:(.+)/(.+):) {
150			($rvalcast, $argtype) = ("($1)", $2);
151			}
152			$insn_name[$insn_num] = $insn;
153			$fundtype = $alias_from{$argtype} \|\| $argtype;
154
155			#
156			# Add the case statement and code for the bytecode interpreter in byterun.c
157			#
158			printf BYTERUN_C "\t case INSN_%s:\t\t/* %d */\n\t {\n",
159			uc($insn), $insn_num;
160			my $optarg = $argtype eq "none" ? "" : ", arg";
161			if ($optarg) {
162			printf BYTERUN_C "\t\t$argtype arg;\n\t\tBGET_%s(arg);\n", $fundtype;
163			}
164			if ($flags =~ /x/) {
165			print BYTERUN_C "\t\tBSET_$insn($lvalue$optarg);\n";
166			} elsif ($flags =~ /s/) {
167			# Store instructions store to bytecode_obj_list[arg]. "lvalue" field is rvalue.
168			print BYTERUN_C "\t\tBSET_OBJ_STORE($lvalue$optarg);\n";
169			}
170			elsif ($optarg && $lvalue ne "none") {
171			print BYTERUN_C "\t\t$lvalue = ${rvalcast}arg;\n";
172			}
173			print BYTERUN_C "\t\tbreak;\n\t }\n";
174
175			#
176			# Add the initialiser line for %insn_data in Asmdata.pm
177			#
178			print ASMDATA_PM <<"EOT";
179			\$insn_data{$insn} = [$insn_num, \\&PUT_$fundtype, "GET_$fundtype"];
180			EOT
181
182			# Find the next unused instruction number
183			do { $insn_num++ } while $insn_name[$insn_num];
184			}
185
186			#
187			# Finish off byterun.c
188			#
189			print BYTERUN_C <<'EOT';
190			default:
191			Perl_croak(aTHX_ "Illegal bytecode instruction %d\n", insn);
192			/* NOTREACHED */
193			}
194			}
195			return 0;
196			}
197			EOT
198
199			#
200			# Write the instruction and optype enum constants into byterun.h
201			#
202			open(BYTERUN_H, ">ext/ByteLoader/byterun.h") or die "ext/ByteLoader/byterun.h: $!";
203			binmode BYTERUN_H;
204			print BYTERUN_H $c_header, <<'EOT';
205			struct byteloader_fdata {
206			SV *datasv;
207			int next_out;
208			int idx;
209			};
210
211			struct byteloader_state {
212			struct byteloader_fdata *bs_fdata;
213			SV *bs_sv;
214			void **bs_obj_list;
215			int bs_obj_list_fill;
216			int bs_ix;
217			XPV bs_pv;
218			int bs_iv_overflows;
219			};
220
221			int bl_getc(struct byteloader_fdata *);
222			int bl_read(struct byteloader_fdata , char , size_t, size_t);
223			extern int byterun(pTHX_ struct byteloader_state *);
224
225			enum {
226			EOT
227
228			my $add_enum_value = 0;
229			my $max_insn;
230			for $i ( 0 .. $#insn_name ) {
231			$insn = uc($insn_name[$i]);
232			if (defined($insn)) {
233			$max_insn = $i;
234			if ($add_enum_value) {
235			print BYTERUN_H " INSN_$insn = $i,\t\t\t/* $i */\n";
236			$add_enum_value = 0;
237			} else {
238			print BYTERUN_H " INSN_$insn,\t\t\t/* $i */\n";
239			}
240			} else {
241			$add_enum_value = 1;
242			}
243			}
244
245			print BYTERUN_H " MAX_INSN = $max_insn\n};\n";
246
247			print BYTERUN_H "\nenum {\n";
248			for ($i = 0; $i < @optype - 1; $i++) {
249			printf BYTERUN_H " OPt_%s,\t\t/* %d */\n", $optype[$i], $i;
250			}
251			printf BYTERUN_H " OPt_%s\t\t/* %d */\n};\n\n", $optype[$i], $i;
252
253			#
254			# Finish off insn_data and create array initialisers in Asmdata.pm
255			#
256			print ASMDATA_PM <<'EOT';
257
258			my ($insn_name, $insn_data);
259			while (($insn_name, $insn_data) = each %insn_data) {
260			$insn_name[$insn_data->[0]] = $insn_name;
261			}
262			# Fill in any gaps
263			@insn_name = map($_ \|\| "unused", @insn_name);
264
265			1;
266
267			__END__
268
269			=head1 NAME
270
271			B::Asmdata - Autogenerated data about Perl ops, used to generate bytecode
272
273			=head1 SYNOPSIS
274
275			use B::Asmdata qw(%insn_data @insn_name @optype @specialsv_name);
276
277			=head1 DESCRIPTION
278
279			Provides information about Perl ops in order to generate bytecode via
280			a bunch of exported variables. Its mostly used by B::Assembler and
281			B::Disassembler.
282
283			=over 4
284
285			=item %insn_data
286
287			my($bytecode_num, $put_sub, $get_meth) = @$insn_data{$op_name};
288
289			For a given $op_name (for example, 'cop_label', 'sv_flags', etc...)
290			you get an array ref containing the bytecode number of the op, a
291			reference to the subroutine used to 'PUT', and the name of the method
292			used to 'GET'.
293
294			=for _private
295			Add more detail about what $put_sub and $get_meth are and how to use them.
296
297			=item @insn_name
298
299			my $op_name = $insn_name[$bytecode_num];
300
301			A simple mapping of the bytecode number to the name of the op.
302			Suitable for using with %insn_data like so:
303
304			my $op_info = $insn_data{$insn_name[$bytecode_num]};
305
306			=item @optype
307
308			my $op_type = $optype[$op_type_num];
309
310			A simple mapping of the op type number to its type (like 'COP' or 'BINOP').
311
312			=item @specialsv_name
313
314			my $sv_name = $specialsv_name[$sv_index];
315
316			Certain SV types are considered 'special'. They're represented by
317			B::SPECIAL and are refered to by a number from the specialsv_list.
318			This array maps that number back to the name of the SV (like 'Nullsv'
319			or '&PL_sv_undef').
320
321			=back
322
323			=head1 AUTHOR
324
325			Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>
326
327			=cut
328			EOT
329
330
331			close ASMDATA_PM or die "Error closing ASMDATA_PM: $!";
332			close BYTERUN_H or die "Error closing BYTERUN_H: $!";
333			close BYTERUN_C or die "Error closing BYTERUN_C: $!";
334
335			__END__
336			# First set instruction ord("#") to read comment to end-of-line (sneaky)
337			%number 35
338			comment arg comment_t
339			# Then make ord("\n") into a no-op
340			%number 10
341			nop none none
342
343			# Now for the rest of the ordinary ones, beginning with \0 which is
344			# ret so that \0-terminated strings can be read properly as bytecode.
345			%number 0
346			#
347			# The argtype is either a single type or "rightvaluecast/argtype".
348			#
349			#opcode lvalue argtype flags
350			#
351			ret none none x
352			ldsv bstate->bs_sv svindex
353			ldop PL_op opindex
354			stsv bstate->bs_sv U32 s
355			stop PL_op U32 s
356			stpv bstate->bs_pv.xpv_pv U32 x
357			ldspecsv bstate->bs_sv U8 x
358			ldspecsvx bstate->bs_sv U8 x
359			newsv bstate->bs_sv U8 x
360			newsvx bstate->bs_sv U32 x
361			newop PL_op U8 x
362			newopx PL_op U16 x
363			newopn PL_op U8 x
364			newpv none PV
365			pv_cur bstate->bs_pv.xpv_cur STRLEN
366			pv_free bstate->bs_pv none x
367			sv_upgrade bstate->bs_sv U8 x
368			sv_refcnt SvREFCNT(bstate->bs_sv) U32
369			sv_refcnt_add SvREFCNT(bstate->bs_sv) I32 x
370			sv_flags SvFLAGS(bstate->bs_sv) U32
371			xrv SvRV(bstate->bs_sv) svindex
372			xpv bstate->bs_sv none x
373			xpv_cur SvCUR(bstate->bs_sv) STRLEN
374			xpv_len SvLEN(bstate->bs_sv) STRLEN
375			xiv SvIVX(bstate->bs_sv) IV
376			xnv SvNVX(bstate->bs_sv) NV
377			xlv_targoff LvTARGOFF(bstate->bs_sv) STRLEN
378			xlv_targlen LvTARGLEN(bstate->bs_sv) STRLEN
379			xlv_targ LvTARG(bstate->bs_sv) svindex
380			xlv_type LvTYPE(bstate->bs_sv) char
381			xbm_useful BmUSEFUL(bstate->bs_sv) I32
382			xbm_previous BmPREVIOUS(bstate->bs_sv) U16
383			xbm_rare BmRARE(bstate->bs_sv) U8
384			xfm_lines FmLINES(bstate->bs_sv) IV
385			xio_lines IoLINES(bstate->bs_sv) IV
386			xio_page IoPAGE(bstate->bs_sv) IV
387			xio_page_len IoPAGE_LEN(bstate->bs_sv) IV
388			xio_lines_left IoLINES_LEFT(bstate->bs_sv) IV
389			xio_top_name IoTOP_NAME(bstate->bs_sv) pvindex
390			xio_top_gv (SV*)&IoTOP_GV(bstate->bs_sv) svindex
391			xio_fmt_name IoFMT_NAME(bstate->bs_sv) pvindex
392			xio_fmt_gv (SV*)&IoFMT_GV(bstate->bs_sv) svindex
393			xio_bottom_name IoBOTTOM_NAME(bstate->bs_sv) pvindex
394			xio_bottom_gv (SV*)&IoBOTTOM_GV(bstate->bs_sv) svindex
395			xio_subprocess IoSUBPROCESS(bstate->bs_sv) short
396			xio_type IoTYPE(bstate->bs_sv) char
397			xio_flags IoFLAGS(bstate->bs_sv) char
398			xcv_xsubany (SV*)&CvXSUBANY(bstate->bs_sv).any_ptr svindex
399			xcv_stash (SV*)&CvSTASH(bstate->bs_sv) svindex
400			xcv_start CvSTART(bstate->bs_sv) opindex
401			xcv_root CvROOT(bstate->bs_sv) opindex
402			xcv_gv (SV*)&CvGV(bstate->bs_sv) svindex
403			xcv_file CvFILE(bstate->bs_sv) pvindex
404			xcv_depth CvDEPTH(bstate->bs_sv) long
405			xcv_padlist (SV*)&CvPADLIST(bstate->bs_sv) svindex
406			xcv_outside (SV*)&CvOUTSIDE(bstate->bs_sv) svindex
407			xcv_outside_seq CvOUTSIDE_SEQ(bstate->bs_sv) U32
408			xcv_flags CvFLAGS(bstate->bs_sv) U16
409			av_extend bstate->bs_sv SSize_t x
410			av_pushx bstate->bs_sv svindex x
411			av_push bstate->bs_sv svindex x
412			xav_fill AvFILLp(bstate->bs_sv) SSize_t
413			xav_max AvMAX(bstate->bs_sv) SSize_t
414			xav_flags AvFLAGS(bstate->bs_sv) U8
415			xhv_riter HvRITER(bstate->bs_sv) I32
416			xhv_name HvNAME(bstate->bs_sv) pvindex
417			xhv_pmroot (OP*)&HvPMROOT(bstate->bs_sv) opindex
418			hv_store bstate->bs_sv svindex x
419			sv_magic bstate->bs_sv char x
420			mg_obj SvMAGIC(bstate->bs_sv)->mg_obj svindex
421			mg_private SvMAGIC(bstate->bs_sv)->mg_private U16
422			mg_flags SvMAGIC(bstate->bs_sv)->mg_flags U8
423			mg_name SvMAGIC(bstate->bs_sv) pvcontents x
424			mg_namex SvMAGIC(bstate->bs_sv) svindex x
425			xmg_stash (SV*)&SvSTASH(bstate->bs_sv) svindex
426			gv_fetchpv bstate->bs_sv strconst x
427			gv_fetchpvx bstate->bs_sv strconst x
428			gv_stashpv bstate->bs_sv strconst x
429			gv_stashpvx bstate->bs_sv strconst x
430			gp_sv GvSV(bstate->bs_sv) svindex
431			gp_refcnt GvREFCNT(bstate->bs_sv) U32
432			gp_refcnt_add GvREFCNT(bstate->bs_sv) I32 x
433			gp_av (SV*)&GvAV(bstate->bs_sv) svindex
434			gp_hv (SV*)&GvHV(bstate->bs_sv) svindex
435			gp_cv (SV*)&GvCV(bstate->bs_sv) svindex
436			gp_file GvFILE(bstate->bs_sv) pvindex
437			gp_io (SV*)&GvIOp(bstate->bs_sv) svindex
438			gp_form (SV*)&GvFORM(bstate->bs_sv) svindex
439			gp_cvgen GvCVGEN(bstate->bs_sv) U32
440			gp_line GvLINE(bstate->bs_sv) line_t
441			gp_share bstate->bs_sv svindex x
442			xgv_flags GvFLAGS(bstate->bs_sv) U8
443			op_next PL_op->op_next opindex
444			op_sibling PL_op->op_sibling opindex
445			op_ppaddr PL_op->op_ppaddr strconst x
446			op_targ PL_op->op_targ PADOFFSET
447			op_type PL_op OPCODE x
448			op_seq PL_op->op_seq U16
449			op_flags PL_op->op_flags U8
450			op_private PL_op->op_private U8
451			op_first cUNOP->op_first opindex
452			op_last cBINOP->op_last opindex
453			op_other cLOGOP->op_other opindex
454			op_pmreplroot cPMOP->op_pmreplroot opindex
455			op_pmreplstart cPMOP->op_pmreplstart opindex
456			op_pmnext (OP*)&cPMOP->op_pmnext opindex
457			#ifdef USE_ITHREADS
458			op_pmstashpv cPMOP pvindex x
459			op_pmreplrootpo cPMOP->op_pmreplroot OP*/PADOFFSET
460			#else
461			op_pmstash (SV*)&cPMOP->op_pmstash svindex
462			op_pmreplrootgv (SV*)&cPMOP->op_pmreplroot svindex
463			#endif
464			pregcomp PL_op pvcontents x
465			op_pmflags cPMOP->op_pmflags U16
466			op_pmpermflags cPMOP->op_pmpermflags U16
467			op_pmdynflags cPMOP->op_pmdynflags U8
468			op_sv cSVOP->op_sv svindex
469			op_padix cPADOP->op_padix PADOFFSET
470			op_pv cPVOP->op_pv pvcontents
471			op_pv_tr cPVOP->op_pv op_tr_array
472			op_redoop cLOOP->op_redoop opindex
473			op_nextop cLOOP->op_nextop opindex
474			op_lastop cLOOP->op_lastop opindex
475			cop_label cCOP->cop_label pvindex
476			#ifdef USE_ITHREADS
477			cop_stashpv cCOP pvindex x
478			cop_file cCOP pvindex x
479			#else
480			cop_stash cCOP svindex x
481			cop_filegv cCOP svindex x
482			#endif
483			cop_seq cCOP->cop_seq U32
484			cop_arybase cCOP->cop_arybase I32
485			cop_line cCOP->cop_line line_t
486			cop_io cCOP->cop_io svindex
487			cop_warnings cCOP->cop_warnings svindex
488			main_start PL_main_start opindex
489			main_root PL_main_root opindex
490			main_cv (SV*)&PL_main_cv svindex
491			curpad PL_curpad svindex x
492			push_begin PL_beginav svindex x
493			push_init PL_initav svindex x
494			push_end PL_endav svindex x
495			curstash (SV*)&PL_curstash svindex
496			defstash (SV*)&PL_defstash svindex
497			data none U8 x
498			incav (SV*)&GvAV(PL_incgv) svindex
499			load_glob none svindex x
500			#ifdef USE_ITHREADS
501			regex_padav (SV*)&PL_regex_padav svindex
502			#endif
503			dowarn PL_dowarn U8
504			comppad_name (SV*)&PL_comppad_name svindex
505			xgv_stash (SV*)&GvSTASH(bstate->bs_sv) svindex
506			signal bstate->bs_sv strconst x
507			# to be removed
508			formfeed PL_formfeed svindex