af9fe8f597
We don't need to sort opcodes anymore, since we are using an O(1) hash and not binary search. Instead, sort them in the order they first appear in insns.dat; this lets us move all the pseudo-ops to a contiguous range at the start of the file, for more efficient handling. Change the functions that process pseudo-ops accordingly. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
1048 lines
33 KiB
Perl
Executable file
1048 lines
33 KiB
Perl
Executable file
#!/usr/bin/perl
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## --------------------------------------------------------------------------
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##
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## Copyright 1996-2017 The NASM Authors - All Rights Reserved
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## See the file AUTHORS included with the NASM distribution for
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## the specific copyright holders.
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##
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## Redistribution and use in source and binary forms, with or without
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## modification, are permitted provided that the following
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## conditions are met:
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##
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## * Redistributions of source code must retain the above copyright
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## notice, this list of conditions and the following disclaimer.
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## * Redistributions in binary form must reproduce the above
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## copyright notice, this list of conditions and the following
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## disclaimer in the documentation and/or other materials provided
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## with the distribution.
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##
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## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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## CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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## INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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## DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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## NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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## OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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## EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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##
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## --------------------------------------------------------------------------
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#
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# insns.pl
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#
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# Parse insns.dat and produce generated source code files
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require 'x86/insns-iflags.ph';
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# Opcode prefixes which need their own opcode tables
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# LONGER PREFIXES FIRST!
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@disasm_prefixes = qw(0F24 0F25 0F38 0F3A 0F7A 0FA6 0FA7 0F);
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# This should match MAX_OPERANDS from nasm.h
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$MAX_OPERANDS = 5;
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# Add VEX/XOP prefixes
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@vex_class = ( 'vex', 'xop', 'evex' );
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$vex_classes = scalar(@vex_class);
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@vexlist = ();
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%vexmap = ();
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for ($c = 0; $c < $vex_classes; $c++) {
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$vexmap{$vex_class[$c]} = $c;
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for ($m = 0; $m < 32; $m++) {
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for ($p = 0; $p < 4; $p++) {
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push(@vexlist, sprintf("%s%02X%01X", $vex_class[$c], $m, $p));
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}
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}
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}
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@disasm_prefixes = (@vexlist, @disasm_prefixes);
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@bytecode_count = (0) x 256;
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print STDERR "Reading insns.dat...\n";
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@args = ();
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undef $output;
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foreach $arg ( @ARGV ) {
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if ( $arg =~ /^\-/ ) {
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if ( $arg =~ /^\-([abdin]|f[hc])$/ ) {
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$output = $1;
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} else {
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die "$0: Unknown option: ${arg}\n";
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}
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} else {
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push (@args, $arg);
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}
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}
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die if (scalar(@args) != 2); # input output
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($fname, $oname) = @args;
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open(F, '<', $fname) || die "unable to open $fname";
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%dinstables = ();
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@bytecode_list = ();
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$line = 0;
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$insns = 0;
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$n_opcodes = $n_opcodes_cc = 0;
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while (<F>) {
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$line++;
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chomp;
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next if ( /^\s*(\;.*|)$/ ); # comments or blank lines
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unless (/^\s*(\S+)\s+(\S+)\s+(\S+|\[.*\])\s+(\S+)\s*$/) {
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warn "line $line does not contain four fields\n";
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next;
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}
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@fields = ($1, $2, $3, $4);
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@field_list = ([@fields, 0]);
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if ($fields[1] =~ /\*/) {
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# This instruction has relaxed form(s)
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if ($fields[2] !~ /^\[/) {
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warn "line $line has an * operand but uses raw bytecodes\n";
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next;
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}
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$opmask = 0;
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@ops = split(/,/, $fields[1]);
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for ($oi = 0; $oi < scalar @ops; $oi++) {
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if ($ops[$oi] =~ /\*$/) {
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if ($oi == 0) {
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warn "line $line has a first operand with a *\n";
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next;
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}
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$opmask |= 1 << $oi;
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}
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}
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for ($oi = 1; $oi < (1 << scalar @ops); $oi++) {
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if (($oi & ~$opmask) == 0) {
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my @xops = ();
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my $omask = ~$oi;
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for ($oj = 0; $oj < scalar(@ops); $oj++) {
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if ($omask & 1) {
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push(@xops, $ops[$oj]);
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}
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$omask >>= 1;
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}
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push(@field_list, [$fields[0], join(',', @xops),
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$fields[2], $fields[3], $oi]);
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}
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}
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}
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foreach $fptr (@field_list) {
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@fields = @$fptr;
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($formatted, $nd) = format_insn(@fields);
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if ($formatted) {
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$insns++;
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$aname = "aa_$fields[0]";
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push @$aname, $formatted;
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}
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if ( $fields[0] =~ /cc$/ ) {
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# Conditional instruction
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if (!defined($k_opcodes_cc{$fields[0]})) {
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$k_opcodes_cc{$fields[0]} = $n_opcodes_cc++;
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}
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} else {
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# Unconditional instruction
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if (!defined($k_opcodes{$fields[0]})) {
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$k_opcodes{$fields[0]} = $n_opcodes++;
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}
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}
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if ($formatted && !$nd) {
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push @big, $formatted;
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my @sseq = startseq($fields[2], $fields[4]);
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foreach $i (@sseq) {
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if (!defined($dinstables{$i})) {
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$dinstables{$i} = [];
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}
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push(@{$dinstables{$i}}, $#big);
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}
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}
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}
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}
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close F;
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#
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# Generate the bytecode array. At this point, @bytecode_list contains
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# the full set of bytecodes.
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#
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# Sort by descending length
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@bytecode_list = sort { scalar(@$b) <=> scalar(@$a) } @bytecode_list;
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@bytecode_array = ();
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%bytecode_pos = ();
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$bytecode_next = 0;
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foreach $bl (@bytecode_list) {
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my $h = hexstr(@$bl);
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next if (defined($bytecode_pos{$h}));
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push(@bytecode_array, $bl);
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while ($h ne '') {
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$bytecode_pos{$h} = $bytecode_next;
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$h = substr($h, 2);
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$bytecode_next++;
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}
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}
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undef @bytecode_list;
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@opcodes = sort { $k_opcodes{$a} <=> $k_opcodes{$b} } keys(%k_opcodes);
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@opcodes_cc = sort { $k_opcodes_cc{$a} <=> $k_opcodes_cc{$b} } keys(%k_opcodes_cc);
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if ( $output eq 'b') {
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print STDERR "Writing $oname...\n";
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open(B, '>', $oname);
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print B "/* This file auto-generated from insns.dat by insns.pl" .
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" - don't edit it */\n\n";
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print B "#include \"nasm.h\"\n";
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print B "#include \"insns.h\"\n\n";
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print B "const uint8_t nasm_bytecodes[$bytecode_next] = {\n";
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$p = 0;
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foreach $bl (@bytecode_array) {
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printf B " /* %5d */ ", $p;
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foreach $d (@$bl) {
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printf B "%#o,", $d;
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$p++;
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}
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printf B "\n";
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}
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print B "};\n";
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print B "\n";
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print B "/*\n";
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print B " * Bytecode frequencies (including reuse):\n";
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print B " *\n";
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for ($i = 0; $i < 32; $i++) {
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print B " *";
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for ($j = 0; $j < 256; $j += 32) {
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print B " |" if ($j);
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printf B " %3o:%4d", $i+$j, $bytecode_count[$i+$j];
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}
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print B "\n";
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}
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print B " */\n";
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close B;
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}
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if ( $output eq 'a' ) {
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print STDERR "Writing $oname...\n";
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open(A, '>', $oname);
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print A "/* This file auto-generated from insns.dat by insns.pl" .
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" - don't edit it */\n\n";
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print A "#include \"nasm.h\"\n";
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print A "#include \"insns.h\"\n\n";
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foreach $i (@opcodes, @opcodes_cc) {
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print A "static const struct itemplate instrux_${i}[] = {\n";
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$aname = "aa_$i";
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foreach $j (@$aname) {
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print A " ", codesubst($j), "\n";
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}
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print A " ITEMPLATE_END\n};\n\n";
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}
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print A "const struct itemplate * const nasm_instructions[] = {\n";
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foreach $i (@opcodes, @opcodes_cc) {
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print A " instrux_${i},\n";
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}
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print A "};\n";
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close A;
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}
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if ( $output eq 'd' ) {
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print STDERR "Writing $oname...\n";
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open(D, '>', $oname);
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print D "/* This file auto-generated from insns.dat by insns.pl" .
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" - don't edit it */\n\n";
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print D "#include \"nasm.h\"\n";
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print D "#include \"insns.h\"\n\n";
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print D "static const struct itemplate instrux[] = {\n";
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$n = 0;
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foreach $j (@big) {
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printf D " /* %4d */ %s\n", $n++, codesubst($j);
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}
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print D "};\n";
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foreach $h (sort(keys(%dinstables))) {
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next if ($h eq ''); # Skip pseudo-instructions
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print D "\nstatic const struct itemplate * const itable_${h}[] = {\n";
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foreach $j (@{$dinstables{$h}}) {
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print D " instrux + $j,\n";
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}
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print D "};\n";
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}
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@prefix_list = ();
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foreach $h (@disasm_prefixes, '') {
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for ($c = 0; $c < 256; $c++) {
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$nn = sprintf("%s%02X", $h, $c);
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if ($is_prefix{$nn} || defined($dinstables{$nn})) {
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# At least one entry in this prefix table
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push(@prefix_list, $h);
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$is_prefix{$h} = 1;
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last;
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}
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}
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}
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foreach $h (@prefix_list) {
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print D "\n";
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print D "static " unless ($h eq '');
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print D "const struct disasm_index ";
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print D ($h eq '') ? 'itable' : "itable_$h";
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print D "[256] = {\n";
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for ($c = 0; $c < 256; $c++) {
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$nn = sprintf("%s%02X", $h, $c);
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if ($is_prefix{$nn}) {
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die "$fname: ambiguous decoding of $nn\n"
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if (defined($dinstables{$nn}));
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printf D " /* 0x%02x */ { itable_%s, -1 },\n", $c, $nn;
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} elsif (defined($dinstables{$nn})) {
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printf D " /* 0x%02x */ { itable_%s, %u },\n", $c,
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$nn, scalar(@{$dinstables{$nn}});
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} else {
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printf D " /* 0x%02x */ { NULL, 0 },\n", $c;
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}
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}
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print D "};\n";
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}
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printf D "\nconst struct disasm_index * const itable_vex[NASM_VEX_CLASSES][32][4] =\n";
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print D "{\n";
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for ($c = 0; $c < $vex_classes; $c++) {
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print D " {\n";
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for ($m = 0; $m < 32; $m++) {
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print D " { ";
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for ($p = 0; $p < 4; $p++) {
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$vp = sprintf("%s%02X%01X", $vex_class[$c], $m, $p);
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printf D "%-15s",
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($is_prefix{$vp} ? sprintf("itable_%s,", $vp) : 'NULL,');
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}
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print D "},\n";
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}
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print D " },\n";
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}
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print D "};\n";
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close D;
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}
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if ( $output eq 'i' ) {
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print STDERR "Writing $oname...\n";
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open(I, '>', $oname);
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print I "/* This file is auto-generated from insns.dat by insns.pl" .
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" - don't edit it */\n\n";
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print I "/* This file in included by nasm.h */\n\n";
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print I "/* Instruction names */\n\n";
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print I "#ifndef NASM_INSNSI_H\n";
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print I "#define NASM_INSNSI_H 1\n\n";
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print I "enum opcode {\n";
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$maxlen = 0;
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foreach $i (@opcodes, @opcodes_cc) {
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print I "\tI_${i},\n";
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$len = length($i);
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$len++ if ( $i =~ /cc$/ ); # Condition codes can be 3 characters long
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$maxlen = $len if ( $len > $maxlen );
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}
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print I "\tI_none = -1\n";
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print I "};\n\n";
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print I "#define MAX_INSLEN ", $maxlen, "\n";
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print I "#define NASM_VEX_CLASSES ", $vex_classes, "\n";
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print I "#define NO_DECORATOR\t{", join(',',(0) x $MAX_OPERANDS), "}\n";
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print I "#define FIRST_COND_OPCODE I_", $opcodes_cc[0], "\n\n";
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print I "#endif /* NASM_INSNSI_H */\n";
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close I;
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}
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if ( $output eq 'n' ) {
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print STDERR "Writing $oname...\n";
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open(N, '>', $oname);
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print N "/* This file is auto-generated from insns.dat by insns.pl" .
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" - don't edit it */\n\n";
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print N "#include \"tables.h\"\n\n";
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print N "const char * const nasm_insn_names[] = {";
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$first = 1;
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foreach $i (@opcodes, @opcodes_cc) {
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print N "," if ( !$first );
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$first = 0;
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$ilower = $i;
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$ilower =~ s/cc$//; # Remove conditional cc suffix
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$ilower =~ tr/A-Z/a-z/; # Change to lower case (Perl 4 compatible)
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print N "\n\t\"${ilower}\"";
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}
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print N "\n};\n";
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close N;
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}
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if ( $output eq 'fh') {
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write_iflaggen_h();
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}
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if ( $output eq 'fc') {
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write_iflag_c();
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}
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printf STDERR "Done: %d instructions\n", $insns;
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# Count primary bytecodes, for statistics
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sub count_bytecodes(@) {
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my $skip = 0;
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foreach my $bc (@_) {
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if ($skip) {
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$skip--;
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next;
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}
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$bytecode_count[$bc]++;
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if ($bc >= 01 && $bc <= 04) {
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$skip = $bc;
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} elsif (($bc & ~03) == 010) {
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$skip = 1;
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} elsif (($bc & ~013) == 0144) {
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$skip = 1;
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} elsif ($bc == 0172 || $bc == 0173) {
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$skip = 1;
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} elsif (($bc & ~3) == 0260 || $bc == 0270) { # VEX
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$skip = 2;
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} elsif (($bc & ~3) == 0240 || $bc == 0250) { # EVEX
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$skip = 3;
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} elsif ($bc == 0330) {
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$skip = 1;
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}
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}
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}
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|
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sub format_insn($$$$$) {
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my ($opcode, $operands, $codes, $flags, $relax) = @_;
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my $num, $nd = 0, $rawflags, $flagsindex;
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my @bytecode;
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my $op, @ops, $opp, @opx, @oppx, @decos, @opevex;
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return (undef, undef) if $operands eq "ignore";
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# format the operands
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$operands =~ s/\*//g;
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$operands =~ s/:/|colon,/g;
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@ops = ();
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@decos = ();
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if ($operands ne 'void') {
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foreach $op (split(/,/, $operands)) {
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@opx = ();
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@opevex = ();
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foreach $opp (split(/\|/, $op)) {
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@oppx = ();
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if ($opp =~ s/^(b(32|64)|mask|z|er|sae)$//) {
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push(@opevex, $1);
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}
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if ($opp =~ s/(?<!\d)(8|16|32|64|80|128|256|512)$//) {
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push(@oppx, "bits$1");
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}
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$opp =~ s/^mem$/memory/;
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$opp =~ s/^memory_offs$/mem_offs/;
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$opp =~ s/^imm$/immediate/;
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$opp =~ s/^([a-z]+)rm$/rm_$1/;
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$opp =~ s/^rm$/rm_gpr/;
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$opp =~ s/^reg$/reg_gpr/;
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# only for evex insns, high-16 regs are allowed
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if ($codes !~ /(^|\s)evex\./) {
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$opp =~ s/^(rm_[xyz]mm)$/$1_l16/;
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$opp =~ s/^([xyz]mm)reg$/$1_l16/;
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}
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push(@opx, $opp, @oppx) if $opp;
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}
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$op = join('|', @opx);
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push(@ops, $op);
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push(@decos, (@opevex ? join('|', @opevex) : '0'));
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}
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}
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|
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$num = scalar(@ops);
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while (scalar(@ops) < $MAX_OPERANDS) {
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push(@ops, '0');
|
|
push(@decos, '0');
|
|
}
|
|
$operands = join(',', @ops);
|
|
$operands =~ tr/a-z/A-Z/;
|
|
|
|
$decorators = "{" . join(',', @decos) . "}";
|
|
if ($decorators =~ /^{(0,)+0}$/) {
|
|
$decorators = "NO_DECORATOR";
|
|
}
|
|
$decorators =~ tr/a-z/A-Z/;
|
|
|
|
# format the flags
|
|
$nd = 1 if $flags =~ /(^|\,)ND($|\,)/;
|
|
$flags =~ s/(^|\,)ND($|\,)/\1/g;
|
|
$flags =~ s/(^|\,)X64($|\,)/\1LONG,X86_64\2/g;
|
|
if ($codes =~ /evex\./) {
|
|
$flags .= ",EVEX";
|
|
} elsif ($codes =~ /(vex|xop)\./) {
|
|
$flags .= ",VEX";
|
|
}
|
|
$rawflags = $flags;
|
|
$flagsindex = insns_flag_index(split(',',$flags));
|
|
|
|
die "Error in flags $rawflags" if not defined($flagsindex);
|
|
|
|
@bytecode = (decodify($codes, $relax), 0);
|
|
push(@bytecode_list, [@bytecode]);
|
|
$codes = hexstr(@bytecode);
|
|
count_bytecodes(@bytecode);
|
|
|
|
("{I_$opcode, $num, {$operands}, $decorators, \@\@CODES-$codes\@\@, $flagsindex},", $nd);
|
|
}
|
|
|
|
#
|
|
# Look for @@CODES-xxx@@ sequences and replace them with the appropriate
|
|
# offset into nasm_bytecodes
|
|
#
|
|
sub codesubst($) {
|
|
my($s) = @_;
|
|
my $n;
|
|
|
|
while ($s =~ /\@\@CODES-([0-9A-F]+)\@\@/) {
|
|
my $pos = $bytecode_pos{$1};
|
|
if (!defined($pos)) {
|
|
die "$fname: no position assigned to byte code $1\n";
|
|
}
|
|
$s = $` . "nasm_bytecodes+${pos}" . "$'";
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
sub addprefix ($@) {
|
|
my ($prefix, @list) = @_;
|
|
my $x;
|
|
my @l = ();
|
|
|
|
foreach $x (@list) {
|
|
push(@l, sprintf("%s%02X", $prefix, $x));
|
|
}
|
|
|
|
return @l;
|
|
}
|
|
|
|
#
|
|
# Turn a code string into a sequence of bytes
|
|
#
|
|
sub decodify($$) {
|
|
# Although these are C-syntax strings, by convention they should have
|
|
# only octal escapes (for directives) and hexadecimal escapes
|
|
# (for verbatim bytes)
|
|
my($codestr, $relax) = @_;
|
|
|
|
if ($codestr =~ /^\s*\[([^\]]*)\]\s*$/) {
|
|
return byte_code_compile($1, $relax);
|
|
}
|
|
|
|
my $c = $codestr;
|
|
my @codes = ();
|
|
|
|
unless ($codestr eq 'ignore') {
|
|
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 = $2;
|
|
next;
|
|
} else {
|
|
die "$fname: unknown code format in \"$codestr\"\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
return @codes;
|
|
}
|
|
|
|
# Turn a numeric list into a hex string
|
|
sub hexstr(@) {
|
|
my $s = '';
|
|
my $c;
|
|
|
|
foreach $c (@_) {
|
|
$s .= sprintf("%02X", $c);
|
|
}
|
|
return $s;
|
|
}
|
|
|
|
# Here we determine the range of possible starting bytes for a given
|
|
# instruction. We need only consider the codes:
|
|
# \[1234] mean literal bytes, of course
|
|
# \1[0123] mean byte plus register value
|
|
# \330 means byte plus condition code
|
|
# \0 or \340 mean give up and return empty set
|
|
# \34[4567] mean PUSH/POP of segment registers: special case
|
|
# \17[234] skip is4 control byte
|
|
# \26x \270 skip VEX control bytes
|
|
# \24x \250 skip EVEX control bytes
|
|
sub startseq($$) {
|
|
my ($codestr, $relax) = @_;
|
|
my $word, @range;
|
|
my @codes = ();
|
|
my $c = $codestr;
|
|
my $c0, $c1, $i;
|
|
my $prefix = '';
|
|
|
|
@codes = decodify($codestr, $relax);
|
|
|
|
while ($c0 = shift(@codes)) {
|
|
$c1 = $codes[0];
|
|
if ($c0 >= 01 && $c0 <= 04) {
|
|
# Fixed byte string
|
|
my $fbs = $prefix;
|
|
while (1) {
|
|
if ($c0 >= 01 && $c0 <= 04) {
|
|
while ($c0--) {
|
|
$fbs .= sprintf("%02X", shift(@codes));
|
|
}
|
|
} 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 >= 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;
|
|
} elsif (($c0 & ~3) == 0260 || $c0 == 0270 ||
|
|
($c0 & ~3) == 0240 || $c0 == 0250) {
|
|
my $c,$m,$wlp;
|
|
$m = shift(@codes);
|
|
$wlp = shift(@codes);
|
|
$c = ($m >> 6);
|
|
$m = $m & 31;
|
|
$prefix .= sprintf('%s%02X%01X', $vex_class[$c], $m, $wlp & 3);
|
|
if ($c0 < 0260) {
|
|
my $tuple = shift(@codes);
|
|
}
|
|
} elsif ($c0 >= 0172 && $c0 <= 173) {
|
|
shift(@codes); # Skip is4 control byte
|
|
} else {
|
|
# We really need to be able to distinguish "forbidden"
|
|
# and "ignorable" codes here
|
|
}
|
|
}
|
|
return $prefix;
|
|
}
|
|
|
|
# EVEX tuple types offset is 0300. e.g. 0301 is for full vector(fv).
|
|
sub tupletype($) {
|
|
my ($tuplestr) = @_;
|
|
my %tuple_codes = (
|
|
'' => 000,
|
|
'fv' => 001,
|
|
'hv' => 002,
|
|
'fvm' => 003,
|
|
't1s8' => 004,
|
|
't1s16' => 005,
|
|
't1s' => 006,
|
|
't1f32' => 007,
|
|
't1f64' => 010,
|
|
't2' => 011,
|
|
't4' => 012,
|
|
't8' => 013,
|
|
'hvm' => 014,
|
|
'qvm' => 015,
|
|
'ovm' => 016,
|
|
'm128' => 017,
|
|
'dup' => 020,
|
|
);
|
|
|
|
if (defined $tuple_codes{$tuplestr}) {
|
|
return 0300 + $tuple_codes{$tuplestr};
|
|
} else {
|
|
die "Undefined tuple type : $tuplestr\n";
|
|
}
|
|
}
|
|
|
|
#
|
|
# This function takes a series of byte codes in a format which is more
|
|
# typical of the Intel documentation, and encode it.
|
|
#
|
|
# The format looks like:
|
|
#
|
|
# [operands: opcodes]
|
|
#
|
|
# The operands word lists the order of the operands:
|
|
#
|
|
# r = register field in the modr/m
|
|
# m = modr/m
|
|
# v = VEX "v" field
|
|
# i = immediate
|
|
# s = register field of is4/imz2 field
|
|
# - = implicit (unencoded) operand
|
|
# x = indeX register of mib. 014..017 bytecodes are used.
|
|
#
|
|
# For an operand that should be filled into more than one field,
|
|
# enter it as e.g. "r+v".
|
|
#
|
|
sub byte_code_compile($$) {
|
|
my($str, $relax) = @_;
|
|
my $opr;
|
|
my $opc;
|
|
my @codes = ();
|
|
my $litix = undef;
|
|
my %oppos = ();
|
|
my $i;
|
|
my $op, $oq;
|
|
my $opex;
|
|
|
|
my %imm_codes = (
|
|
'ib' => 020, # imm8
|
|
'ib,u' => 024, # Unsigned imm8
|
|
'iw' => 030, # imm16
|
|
'ib,s' => 0274, # imm8 sign-extended to opsize or bits
|
|
'iwd' => 034, # imm16 or imm32, depending on opsize
|
|
'id' => 040, # imm32
|
|
'id,s' => 0254, # imm32 sign-extended to 64 bits
|
|
'iwdq' => 044, # imm16/32/64, depending on addrsize
|
|
'rel8' => 050,
|
|
'iq' => 054,
|
|
'rel16' => 060,
|
|
'rel' => 064, # 16 or 32 bit relative operand
|
|
'rel32' => 070,
|
|
'seg' => 074,
|
|
);
|
|
my %plain_codes = (
|
|
'o16' => 0320, # 16-bit operand size
|
|
'o32' => 0321, # 32-bit operand size
|
|
'odf' => 0322, # Operand size is default
|
|
'o64' => 0324, # 64-bit operand size requiring REX.W
|
|
'o64nw' => 0323, # Implied 64-bit operand size (no REX.W)
|
|
'a16' => 0310,
|
|
'a32' => 0311,
|
|
'adf' => 0312, # Address size is default
|
|
'a64' => 0313,
|
|
'!osp' => 0364,
|
|
'!asp' => 0365,
|
|
'f2i' => 0332, # F2 prefix, but 66 for operand size is OK
|
|
'f3i' => 0333, # F3 prefix, but 66 for operand size is OK
|
|
'mustrep' => 0336,
|
|
'mustrepne' => 0337,
|
|
'rex.l' => 0334,
|
|
'norexb' => 0314,
|
|
'norexx' => 0315,
|
|
'norexr' => 0316,
|
|
'norexw' => 0317,
|
|
'repe' => 0335,
|
|
'nohi' => 0325, # Use spl/bpl/sil/dil even without REX
|
|
'nof3' => 0326, # No REP 0xF3 prefix permitted
|
|
'norep' => 0331, # No REP prefix permitted
|
|
'wait' => 0341, # Needs a wait prefix
|
|
'resb' => 0340,
|
|
'np' => 0360, # No prefix
|
|
'jcc8' => 0370, # Match only if Jcc possible with single byte
|
|
'jmp8' => 0371, # Match only if JMP possible with single byte
|
|
'jlen' => 0373, # Length of jump
|
|
'hlexr' => 0271,
|
|
'hlenl' => 0272,
|
|
'hle' => 0273,
|
|
|
|
# This instruction takes XMM VSIB
|
|
'vsibx' => 0374,
|
|
'vm32x' => 0374,
|
|
'vm64x' => 0374,
|
|
|
|
# This instruction takes YMM VSIB
|
|
'vsiby' => 0375,
|
|
'vm32y' => 0375,
|
|
'vm64y' => 0375,
|
|
|
|
# This instruction takes ZMM VSIB
|
|
'vsibz' => 0376,
|
|
'vm32z' => 0376,
|
|
'vm64z' => 0376,
|
|
);
|
|
|
|
unless ($str =~ /^(([^\s:]*)\:*([^\s:]*)\:|)\s*(.*\S)\s*$/) {
|
|
die "$fname: $line: cannot parse: [$str]\n";
|
|
}
|
|
$opr = "\L$2";
|
|
$tuple = "\L$3"; # Tuple type for AVX512
|
|
$opc = "\L$4";
|
|
|
|
my $op = 0;
|
|
for ($i = 0; $i < length($opr); $i++) {
|
|
my $c = substr($opr,$i,1);
|
|
if ($c eq '+') {
|
|
$op--;
|
|
} else {
|
|
if ($relax & 1) {
|
|
$op--;
|
|
}
|
|
$relax >>= 1;
|
|
$oppos{$c} = $op++;
|
|
}
|
|
}
|
|
$tup = tupletype($tuple);
|
|
|
|
my $last_imm = 'h';
|
|
my $prefix_ok = 1;
|
|
foreach $op (split(/\s*(?:\s|(?=[\/\\]))/, $opc)) {
|
|
my $pc = $plain_codes{$op};
|
|
|
|
if (defined $pc) {
|
|
# Plain code
|
|
push(@codes, $pc);
|
|
} elsif ($prefix_ok && $op =~ /^(66|f2|f3)$/) {
|
|
# 66/F2/F3 prefix used as an opcode extension
|
|
if ($op eq '66') {
|
|
push(@codes, 0361);
|
|
} elsif ($op eq 'f2') {
|
|
push(@codes, 0332);
|
|
} else {
|
|
push(@codes, 0333);
|
|
}
|
|
} elsif ($op =~ /^[0-9a-f]{2}$/) {
|
|
if (defined($litix) && $litix+$codes[$litix]+1 == scalar @codes &&
|
|
$codes[$litix] < 4) {
|
|
$codes[$litix]++;
|
|
push(@codes, hex $op);
|
|
} else {
|
|
$litix = scalar(@codes);
|
|
push(@codes, 01, hex $op);
|
|
}
|
|
$prefix_ok = 0;
|
|
} elsif ($op eq '/r') {
|
|
if (!defined($oppos{'r'}) || !defined($oppos{'m'})) {
|
|
die "$fname: $line: $op requires r and m operands\n";
|
|
}
|
|
$opex = (($oppos{'m'} & 4) ? 06 : 0) |
|
|
(($oppos{'r'} & 4) ? 05 : 0);
|
|
push(@codes, $opex) if ($opex);
|
|
# if mib is composed with two separate operands - ICC style
|
|
push(@codes, 014 + ($oppos{'x'} & 3)) if (defined($oppos{'x'}));
|
|
push(@codes, 0100 + (($oppos{'m'} & 3) << 3) + ($oppos{'r'} & 3));
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ m:^/([0-7])$:) {
|
|
if (!defined($oppos{'m'})) {
|
|
die "$fname: $line: $op requires m operand\n";
|
|
}
|
|
push(@codes, 06) if ($oppos{'m'} & 4);
|
|
push(@codes, 0200 + (($oppos{'m'} & 3) << 3) + $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^(vex|xop)(|\..*)$/) {
|
|
my $vexname = $1;
|
|
my $c = $vexmap{$vexname};
|
|
my ($m,$w,$l,$p) = (undef,2,undef,0);
|
|
my $has_nds = 0;
|
|
my @subops = split(/\./, $op);
|
|
shift @subops; # Drop prefix
|
|
foreach $oq (@subops) {
|
|
if ($oq eq '128' || $oq eq 'l0' || $oq eq 'lz') {
|
|
$l = 0;
|
|
} elsif ($oq eq '256' || $oq eq 'l1') {
|
|
$l = 1;
|
|
} elsif ($oq eq 'lig') {
|
|
$l = 2;
|
|
} elsif ($oq eq 'w0') {
|
|
$w = 0;
|
|
} elsif ($oq eq 'w1') {
|
|
$w = 1;
|
|
} elsif ($oq eq 'wig') {
|
|
$w = 2;
|
|
} elsif ($oq eq 'ww') {
|
|
$w = 3;
|
|
} elsif ($oq eq 'p0') {
|
|
$p = 0;
|
|
} elsif ($oq eq '66' || $oq eq 'p1') {
|
|
$p = 1;
|
|
} elsif ($oq eq 'f3' || $oq eq 'p2') {
|
|
$p = 2;
|
|
} elsif ($oq eq 'f2' || $oq eq 'p3') {
|
|
$p = 3;
|
|
} elsif ($oq eq '0f') {
|
|
$m = 1;
|
|
} elsif ($oq eq '0f38') {
|
|
$m = 2;
|
|
} elsif ($oq eq '0f3a') {
|
|
$m = 3;
|
|
} elsif ($oq =~ /^m([0-9]+)$/) {
|
|
$m = $1+0;
|
|
} elsif ($oq eq 'nds' || $oq eq 'ndd' || $oq eq 'dds') {
|
|
if (!defined($oppos{'v'})) {
|
|
die "$fname: $line: $vexname.$oq without 'v' operand\n";
|
|
}
|
|
$has_nds = 1;
|
|
} else {
|
|
die "$fname: $line: undefined \U$vexname\E subcode: $oq\n";
|
|
}
|
|
}
|
|
if (!defined($m) || !defined($w) || !defined($l) || !defined($p)) {
|
|
die "$fname: $line: missing fields in \U$vexname\E specification\n";
|
|
}
|
|
if (defined($oppos{'v'}) && !$has_nds) {
|
|
die "$fname: $line: 'v' operand without ${vexname}.nds or ${vexname}.ndd\n";
|
|
}
|
|
my $minmap = ($c == 1) ? 8 : 0; # 0-31 for VEX, 8-31 for XOP
|
|
if ($m < $minmap || $m > 31) {
|
|
die "$fname: $line: Only maps ${minmap}-31 are valid for \U${vexname}\n";
|
|
}
|
|
push(@codes, defined($oppos{'v'}) ? 0260+($oppos{'v'} & 3) : 0270,
|
|
($c << 6)+$m, ($w << 4)+($l << 2)+$p);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^(evex)(|\..*)$/) {
|
|
my $c = $vexmap{$1};
|
|
my ($m,$w,$l,$p) = (undef,2,undef,0);
|
|
my $has_nds = 0;
|
|
my @subops = split(/\./, $op);
|
|
shift @subops; # Drop prefix
|
|
foreach $oq (@subops) {
|
|
if ($oq eq '128' || $oq eq 'l0' || $oq eq 'lz' || $oq eq 'lig') {
|
|
$l = 0;
|
|
} elsif ($oq eq '256' || $oq eq 'l1') {
|
|
$l = 1;
|
|
} elsif ($oq eq '512' || $oq eq 'l2') {
|
|
$l = 2;
|
|
} elsif ($oq eq 'w0') {
|
|
$w = 0;
|
|
} elsif ($oq eq 'w1') {
|
|
$w = 1;
|
|
} elsif ($oq eq 'wig') {
|
|
$w = 2;
|
|
} elsif ($oq eq 'ww') {
|
|
$w = 3;
|
|
} elsif ($oq eq 'p0') {
|
|
$p = 0;
|
|
} elsif ($oq eq '66' || $oq eq 'p1') {
|
|
$p = 1;
|
|
} elsif ($oq eq 'f3' || $oq eq 'p2') {
|
|
$p = 2;
|
|
} elsif ($oq eq 'f2' || $oq eq 'p3') {
|
|
$p = 3;
|
|
} elsif ($oq eq '0f') {
|
|
$m = 1;
|
|
} elsif ($oq eq '0f38') {
|
|
$m = 2;
|
|
} elsif ($oq eq '0f3a') {
|
|
$m = 3;
|
|
} elsif ($oq =~ /^m([0-9]+)$/) {
|
|
$m = $1+0;
|
|
} elsif ($oq eq 'nds' || $oq eq 'ndd' || $oq eq 'dds') {
|
|
if (!defined($oppos{'v'})) {
|
|
die "$fname: $line: evex.$oq without 'v' operand\n";
|
|
}
|
|
$has_nds = 1;
|
|
} else {
|
|
die "$fname: $line: undefined EVEX subcode: $oq\n";
|
|
}
|
|
}
|
|
if (!defined($m) || !defined($w) || !defined($l) || !defined($p)) {
|
|
die "$fname: $line: missing fields in EVEX specification\n";
|
|
}
|
|
if (defined($oppos{'v'}) && !$has_nds) {
|
|
die "$fname: $line: 'v' operand without evex.nds or evex.ndd\n";
|
|
}
|
|
if ($m > 15) {
|
|
die "$fname: $line: Only maps 0-15 are valid for EVEX\n";
|
|
}
|
|
push(@codes, defined($oppos{'v'}) ? 0240+($oppos{'v'} & 3) : 0250,
|
|
($c << 6)+$m, ($w << 4)+($l << 2)+$p, $tup);
|
|
$prefix_ok = 0;
|
|
} elsif (defined $imm_codes{$op}) {
|
|
if ($op eq 'seg') {
|
|
if ($last_imm lt 'i') {
|
|
die "$fname: $line: seg without an immediate operand\n";
|
|
}
|
|
} else {
|
|
$last_imm++;
|
|
if ($last_imm gt 'j') {
|
|
die "$fname: $line: too many immediate operands\n";
|
|
}
|
|
}
|
|
if (!defined($oppos{$last_imm})) {
|
|
die "$fname: $line: $op without '$last_imm' operand\n";
|
|
}
|
|
push(@codes, 05) if ($oppos{$last_imm} & 4);
|
|
push(@codes, $imm_codes{$op} + ($oppos{$last_imm} & 3));
|
|
$prefix_ok = 0;
|
|
} elsif ($op eq '/is4') {
|
|
if (!defined($oppos{'s'})) {
|
|
die "$fname: $line: $op without 's' operand\n";
|
|
}
|
|
if (defined($oppos{'i'})) {
|
|
push(@codes, 0172, ($oppos{'s'} << 3)+$oppos{'i'});
|
|
} else {
|
|
push(@codes, 05) if ($oppos{'s'} & 4);
|
|
push(@codes, 0174+($oppos{'s'} & 3));
|
|
}
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^\/is4\=([0-9]+)$/) {
|
|
my $imm = $1;
|
|
if (!defined($oppos{'s'})) {
|
|
die "$fname: $line: $op without 's' operand\n";
|
|
}
|
|
if ($imm < 0 || $imm > 15) {
|
|
die "$fname: $line: invalid imm4 value for $op: $imm\n";
|
|
}
|
|
push(@codes, 0173, ($oppos{'s'} << 4) + $imm);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^([0-9a-f]{2})\+c$/) {
|
|
push(@codes, 0330, hex $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^([0-9a-f]{2})\+r$/) {
|
|
if (!defined($oppos{'r'})) {
|
|
die "$fname: $line: $op without 'r' operand\n";
|
|
}
|
|
push(@codes, 05) if ($oppos{'r'} & 4);
|
|
push(@codes, 010 + ($oppos{'r'} & 3), hex $1);
|
|
$prefix_ok = 0;
|
|
} elsif ($op =~ /^\\([0-7]+|x[0-9a-f]{2})$/) {
|
|
# Escape to enter literal bytecodes
|
|
push(@codes, oct $1);
|
|
} else {
|
|
die "$fname: $line: unknown operation: $op\n";
|
|
}
|
|
}
|
|
|
|
return @codes;
|
|
}
|