#!/usr/bin/perl
#
-# insns.pl produce insnsa.c and insnsd.c from insns.dat
+# insns.pl produce insnsa.c, insnsd.c, insnsi.h, insnsn.c from insns.dat
#
# The Netwide Assembler is copyright (C) 1996 Simon Tatham and
# Julian Hall. All rights reserved. The software is
-# redistributable under the licence given in the file "Licence"
+# redistributable under the license given in the file "LICENSE"
# distributed in the NASM archive.
+# Opcode prefixes which need their own opcode tables
+# LONGER PREFIXES FIRST!
+@disasm_prefixes = qw(0F24 0F25 0F38 0F3A 0F7A 0FA6 0FA7 0F);
+
print STDERR "Reading insns.dat...\n";
-open (F, "insns.dat") || die "unable to open insns.dat";
+@args = ();
+undef $output;
+foreach $arg ( @ARGV ) {
+ if ( $arg =~ /^\-/ ) {
+ if ( $arg =~ /^\-([adin])$/ ) {
+ $output = $1;
+ } else {
+ die "$0: Unknown option: ${arg}\n";
+ }
+ } else {
+ push (@args, $arg);
+ }
+}
+
+$fname = "insns.dat" unless $fname = $args[0];
+open (F, $fname) || die "unable to open $fname";
+
+%dinstables = ();
$line = 0;
-$opcodes = 0;
$insns = 0;
while (<F>) {
$line++;
split;
next if $#_ == -1; # blank lines
(warn "line $line does not contain four fields\n"), next if $#_ != 3;
- $formatted = &format(@_);
+ ($formatted, $nd) = &format(@_);
if ($formatted) {
$insns++;
$aname = "aa_$_[0]";
push @$aname, $formatted;
}
- $opcodes[$opcodes++] = $_[0], $done{$_[0]} = 1 if !$done{$_[0]};
- if ($formatted && $formatted !~ /IF_ND/) {
+ if ( $_[0] =~ /cc$/ ) {
+ # Conditional instruction
+ $k_opcodes_cc{$_[0]}++;
+ } else {
+ # Unconditional instruction
+ $k_opcodes{$_[0]}++;
+ }
+ if ($formatted && !$nd) {
push @big, $formatted;
- foreach $i (&startbyte($_[2])) {
- $aname = sprintf "dd_%02X",$i;
- push @$aname, $#big;
+ my @sseq = startseq($_[2]);
+ foreach $i (@sseq) {
+ if (!defined($dinstables{$i})) {
+ $dinstables{$i} = [];
+ }
+ push(@{$dinstables{$i}}, $#big);
}
}
}
close F;
-print STDERR "Writing insnsa.c...\n";
+@opcodes = sort keys(%k_opcodes);
+@opcodes_cc = sort keys(%k_opcodes_cc);
-open A, ">insnsa.c";
+if ( !defined($output) || $output eq 'a' ) {
+ print STDERR "Writing insnsa.c...\n";
-print A "/* This file auto-generated from insns.dat by insns.pl" .
+ open A, ">insnsa.c";
+
+ print A "/* This file auto-generated from insns.dat by insns.pl" .
" - don't edit it */\n\n";
-print A "#include <stdio.h>\n";
-print A "#include \"nasm.h\"\n";
-print A "#include \"insns.h\"\n";
-print A "\n";
-
-foreach $i (@opcodes) {
- print A "static struct itemplate instrux_${i}[] = {\n";
- $aname = "aa_$i";
- foreach $j (@$aname) {
- print A " $j\n";
- }
- print A " {-1}\n};\n\n";
-}
-print A "struct itemplate *nasm_instructions[] = {\n";
-foreach $i (@opcodes) {
- print A " instrux_${i},\n";
-}
-print A "};\n";
+ print A "#include \"nasm.h\"\n";
+ print A "#include \"insns.h\"\n";
+ print A "\n";
-close A;
+ foreach $i (@opcodes, @opcodes_cc) {
+ print A "static const struct itemplate instrux_${i}[] = {\n";
+ $aname = "aa_$i";
+ foreach $j (@$aname) {
+ print A " $j\n";
+ }
+ print A " ITEMPLATE_END\n};\n\n";
+ }
+ print A "const struct itemplate * const nasm_instructions[] = {\n";
+ foreach $i (@opcodes, @opcodes_cc) {
+ print A " instrux_${i},\n";
+ }
+ print A "};\n";
-print STDERR "Writing insnsd.c...\n";
+ close A;
+}
+
+if ( !defined($output) || $output eq 'd' ) {
+ print STDERR "Writing insnsd.c...\n";
-open D, ">insnsd.c";
+ open D, ">insnsd.c";
-print D "/* This file auto-generated from insns.dat by insns.pl" .
+ print D "/* This file auto-generated from insns.dat by insns.pl" .
" - don't edit it */\n\n";
-print D "#include <stdio.h>\n";
-print D "#include \"nasm.h\"\n";
-print D "#include \"insns.h\"\n";
-print D "\n";
-
-print D "static struct itemplate instrux[] = {\n";
-foreach $j (@big) {
- print D " $j\n";
-}
-print D " {-1}\n};\n\n";
-
-for ($c=0; $c<256; $c++) {
- $h = sprintf "%02X", $c;
- print D "static struct itemplate *itable_${h}[] = {\n";
- $aname = "dd_$h";
- foreach $j (@$aname) {
- print D " instrux + $j,\n";
- }
- print D " NULL\n};\n\n";
+ print D "#include \"nasm.h\"\n";
+ print D "#include \"insns.h\"\n";
+ print D "\n";
+
+ print D "static const struct itemplate instrux[] = {\n";
+ $n = 0;
+ foreach $j (@big) {
+ printf D " /* %4d */ %s\n", $n++, $j;
+ }
+ print D "};\n";
+
+ foreach $h (sort(keys(%dinstables))) {
+ print D "\nstatic const struct itemplate * const itable_${h}[] = {\n";
+ foreach $j (@{$dinstables{$h}}) {
+ print D " instrux + $j,\n";
+ }
+ print D "};\n";
+ }
+
+ foreach $h (@disasm_prefixes, '') {
+ $is_prefix{$h} = 1;
+ print D "\n";
+ print D "static " unless ($h eq '');
+ print D "const struct disasm_index ";
+ print D ($h eq '') ? 'itable' : "itable_$h";
+ print D "[256] = {\n";
+ for ($c = 0; $c < 256; $c++) {
+ $nn = sprintf("%s%02X", $h, $c);
+ if ($is_prefix{$nn}) {
+ die "$0: ambiguous decoding of $nn\n"
+ if (defined($dinstables{$nn}));
+ printf D " { itable_%s, -1 },\n", $nn;
+ } elsif (defined($dinstables{$nn})) {
+ printf D " { itable_%s, %u },\n",
+ $nn, scalar(@{$dinstables{$nn}});
+ } else {
+ printf D " { NULL, 0 },\n";
+ }
+ }
+ print D "};\n";
+ }
+
+ close D;
}
-print D "struct itemplate **itable[] = {\n";
-for ($c=0; $c<256; $c++) {
- printf D " itable_%02X,\n", $c;
+if ( !defined($output) || $output eq 'i' ) {
+ print STDERR "Writing insnsi.h...\n";
+
+ open I, ">insnsi.h";
+
+ print I "/* This file is auto-generated from insns.dat by insns.pl" .
+ " - don't edit it */\n\n";
+ print I "/* This file in included by nasm.h */\n\n";
+
+ print I "/* Instruction names */\n\n";
+ print I "#ifndef NASM_INSNSI_H\n";
+ print I "#define NASM_INSNSI_H 1\n\n";
+ print I "enum opcode {\n";
+ $maxlen = 0;
+ foreach $i (@opcodes, @opcodes_cc) {
+ print I "\tI_${i},\n";
+ $len = length($i);
+ $len++ if ( $i =~ /cc$/ ); # Condition codes can be 3 characters long
+ $maxlen = $len if ( $len > $maxlen );
+ }
+ print I "\tI_none = -1\n";
+ print I "\n};\n\n";
+ print I "#define MAX_INSLEN ", $maxlen, "\n\n";
+ print I "#endif /* NASM_INSNSI_H */\n";
+
+ close I;
}
-print D "};\n";
-close D;
+if ( !defined($output) || $output eq 'n' ) {
+ print STDERR "Writing insnsn.c...\n";
+
+ open N, ">insnsn.c";
+
+ print N "/* This file is auto-generated from insns.dat by insns.pl" .
+ " - don't edit it */\n\n";
+ print N "/* This file in included by names.c */\n\n";
+
+ print N "static const char * const insn_names[] = {";
+ $first = 1;
+ foreach $i (@opcodes) {
+ print N "," if ( !$first );
+ $first = 0;
+ $ilower = $i;
+ $ilower =~ tr/A-Z/a-z/; # Change to lower case (Perl 4 compatible)
+ print N "\n\t\"${ilower}\"";
+ }
+ print N "\n};\n\n";
+ print N "/* Conditional instructions */\n";
+ print N "static const char *icn[] = {";
+ $first = 1;
+ foreach $i (@opcodes_cc) {
+ print N "," if ( !$first );
+ $first = 0;
+ $ilower = $i;
+ $ilower =~ s/cc$//; # Skip cc suffix
+ $ilower =~ tr/A-Z/a-z/; # Change to lower case (Perl 4 compatible)
+ print N "\n\t\"${ilower}\"";
+ }
+
+ print N "\n};\n\n";
+ print N "/* and the corresponding opcodes */\n";
+ print N "static const enum opcode ico[] = {";
+ $first = 1;
+ foreach $i (@opcodes_cc) {
+ print N "," if ( !$first );
+ $first = 0;
+ print N "\n\tI_$i";
+ }
+
+ print N "\n};\n";
+
+ close N;
+}
printf STDERR "Done: %d instructions\n", $insns;
sub format {
- local ($opcode, $operands, $codes, $flags) = @_;
- local $num;
-
- return undef if $operands eq "ignore";
-
- # format the operands
- $operands =~ s/:/|colon,/g;
- $operands =~ s/mem(\d+)/mem|bits$1/g;
- $operands =~ s/mem/memory/g;
- $operands =~ s/memory_offs/mem_offs/g;
- $operands =~ s/imm(\d+)/imm|bits$1/g;
- $operands =~ s/imm/immediate/g;
- $operands =~ s/rm(\d+)/regmem|bits$1/g;
- $num = 3;
- $operands = '0,0,0', $num = 0 if $operands eq 'void';
- $operands .= ',0', $num-- while $operands !~ /,.*,/;
- $operands =~ tr/a-z/A-Z/;
-
- # format the flags
- $flags =~ s/,/|IF_/g;
- $flags = "IF_" . $flags;
-
- "{I_$opcode, $num, {$operands}, \"$codes\", $flags},";
+ my ($opcode, $operands, $codes, $flags) = @_;
+ my $num, $nd = 0;
+
+ return (undef, undef) if $operands eq "ignore";
+
+ # format the operands
+ $operands =~ s/:/|colon,/g;
+ $operands =~ s/mem(\d+)/mem|bits$1/g;
+ $operands =~ s/mem/memory/g;
+ $operands =~ s/memory_offs/mem_offs/g;
+ $operands =~ s/imm(\d+)/imm|bits$1/g;
+ $operands =~ s/imm/immediate/g;
+ $operands =~ s/rm(\d+)/rm_gpr|bits$1/g;
+ $operands =~ s/mmxrm/rm_mmx/g;
+ $operands =~ s/xmmrm/rm_xmm/g;
+ $operands =~ s/\=([0-9]+)/same_as|$1/g;
+ if ($operands eq 'void') {
+ @ops = ();
+ } else {
+ @ops = split(/\,/, $operands);
+ }
+ $num = scalar(@ops);
+ while (scalar(@ops) < 4) {
+ push(@ops, '0');
+ }
+ $operands = join(',', @ops);
+ $operands =~ tr/a-z/A-Z/;
+
+ # format the flags
+ $flags =~ s/,/|IF_/g;
+ $flags =~ s/(\|IF_ND|IF_ND\|)//, $nd = 1 if $flags =~ /IF_ND/;
+ $flags = "IF_" . $flags;
+
+ ("{I_$opcode, $num, {$operands}, \"$codes\", $flags},", $nd);
+}
+
+sub addprefix ($@) {
+ my ($prefix, @list) = @_;
+ my $x;
+ my @l = ();
+
+ foreach $x (@list) {
+ push(@l, sprintf("%s%02X", $prefix, $x));
+ }
+
+ return @l;
}
# Here we determine the range of possible starting bytes for a given
# instruction. We need only consider the codes:
# \1 \2 \3 mean literal bytes, of course
# \4 \5 \6 \7 mean PUSH/POP of segment registers: special case
-# \10 \11 \12 mean byte plus register value
-# \17 means byte zero
+# \1[0123] mean byte plus register value
+# \170 means byte zero
# \330 means byte plus condition code
# \0 or \340 mean give up and return empty set
-sub startbyte { # FIXME we cheat, for now :-)
- local ($codes) = @_;
- local $word, @range;
-
- while (1) {
- die "couldn't get code in '$codes'" if $codes !~ /^(\\[^\\]+)(\\.*)?$/;
- $word = $1, $codes = $2;
- return (hex $1) if $word =~ /^\\[123]$/ && $codes =~ /^\\x(..)/;
- return (0x07, 0x17, 0x1F) if $word eq "\\4";
- return (0xA1, 0xA9) if $word eq "\\5";
- return (0x06, 0x0E, 0x16, 0x1E) if $word eq "\\6";
- return (0xA0, 0xA8) if $word eq "\\7";
- $start=hex $1, $r=8, last if $word =~ /^\\1[012]$/ && $codes =~/^\\x(..)/;
- return (0) if $word eq "\\17";
- $start=hex $1, $r=16, last if $word =~ /^\\330$/ && $codes =~ /^\\x(..)/;
- return () if $word eq "\\0" || $word eq "\\340";
+sub startseq($) {
+ my ($codestr) = @_;
+ my $word, @range;
+ my @codes = ();
+ my $c = $codestr;
+ my $c0, $c1, $i;
+ my $prefix = '';
+
+ # Although these are C-syntax strings, by convention they should have
+ # only octal escapes (for directives) and hexadecimal escapes
+ # (for verbatim bytes)
+ while ($c ne '') {
+ if ($c =~ /^\\x([0-9a-f]+)(.*)$/i) {
+ push(@codes, hex $1);
+ $c = $2;
+ next;
+ } elsif ($c =~ /^\\([0-7]{1,3})(.*)$/) {
+ push(@codes, oct $1);
+ $c = $2;
+ next;
+ } else {
+ die "$0: unknown code format in \"$codestr\"\n";
+ }
+ }
+
+ while ($c0 = shift(@codes)) {
+ $c1 = $codes[0];
+ if ($c0 == 01 || $c0 == 02 || $c0 == 03 || $c0 == 0170) {
+ # Fixed byte string
+ my $fbs = $prefix;
+ while (1) {
+ if ($c0 == 01 || $c0 == 02 || $c0 == 03) {
+ while ($c0--) {
+ $fbs .= sprintf("%02X", shift(@codes));
+ }
+ } elsif ($c0 == 0170) {
+ $fbs .= '00';
+ } else {
+ last;
+ }
+ $c0 = shift(@codes);
+ }
+
+ foreach $pfx (@disasm_prefixes) {
+ if (substr($fbs, 0, length($pfx)) eq $pfx) {
+ $prefix = $pfx;
+ $fbs = substr($fbs, length($pfx));
+ last;
+ }
+ }
+
+ if ($fbs ne '') {
+ return ($prefix.substr($fbs,0,2));
+ }
+
+ unshift(@codes, $c0);
+ } elsif ($c0 == 04) {
+ return addprefix($prefix, 0x07, 0x17, 0x1F);
+ } elsif ($c0 == 05) {
+ return addprefix($prefix, 0xA1, 0xA9);
+ } elsif ($c0 == 06) {
+ return addprefix($prefix, 0x06, 0x0E, 0x16, 0x1E);
+ } elsif ($c0 == 07) {
+ return addprefix($prefix, 0xA0, 0xA8);
+ } elsif ($c0 >= 010 && $c0 <= 013) {
+ return addprefix($prefix, $c1..($c1+7));
+ } elsif (($c0 & ~013) == 0144) {
+ return addprefix($prefix, $c1, $c1|2);
+ } elsif ($c0 == 0330) {
+ return addprefix($prefix, $c1..($c1+15));
+ } elsif ($c0 == 0 || $c0 == 0340) {
+ return $prefix;
+ } else {
+ # We really need to be able to distinguish "forbidden"
+ # and "ignorable" codes here
+ }
}
- @range = ();
- push @range, $start++ while ($r-- > 0);
- @range;
+ return $prefix;
}
projects / platform / upstream / nasm.git / blobdiff