| #!/usr/bin/env perl |
| |
| # require 'x86asm.pl'; |
| # &asm_init(<flavor>,"des-586.pl"[,$i386only]); |
| # &function_begin("foo"); |
| # ... |
| # &function_end("foo"); |
| # &asm_finish |
| |
| $out=(); |
| $i386=0; |
| |
| # AUTOLOAD is this context has quite unpleasant side effect, namely |
| # that typos in function calls effectively go to assembler output, |
| # but on the pros side we don't have to implement one subroutine per |
| # each opcode... |
| sub ::AUTOLOAD |
| { my $opcode = $AUTOLOAD; |
| |
| die "more than 4 arguments passed to $opcode" if ($#_>3); |
| |
| $opcode =~ s/.*:://; |
| if ($opcode =~ /^push/) { $stack+=4; } |
| elsif ($opcode =~ /^pop/) { $stack-=4; } |
| |
| &generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD"; |
| } |
| |
| sub ::emit |
| { my $opcode=shift; |
| |
| if ($#_==-1) { push(@out,"\t$opcode\n"); } |
| else { push(@out,"\t$opcode\t".join(',',@_)."\n"); } |
| } |
| |
| sub ::LB |
| { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'"; |
| $1."l"; |
| } |
| sub ::HB |
| { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'"; |
| $1."h"; |
| } |
| sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); } |
| sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); } |
| sub ::blindpop { &pop($_[0]); $stack+=4; } |
| sub ::wparam { &DWP($stack+4*$_[0],"esp"); } |
| sub ::swtmp { &DWP(4*$_[0],"esp"); } |
| |
| sub ::bswap |
| { if ($i386) # emulate bswap for i386 |
| { &comment("bswap @_"); |
| &xchg(&HB(@_),&LB(@_)); |
| &ror (@_,16); |
| &xchg(&HB(@_),&LB(@_)); |
| } |
| else |
| { &generic("bswap",@_); } |
| } |
| # These are made-up opcodes introduced over the years essentially |
| # by ignorance, just alias them to real ones... |
| sub ::movb { &mov(@_); } |
| sub ::xorb { &xor(@_); } |
| sub ::rotl { &rol(@_); } |
| sub ::rotr { &ror(@_); } |
| sub ::exch { &xchg(@_); } |
| sub ::halt { &hlt; } |
| sub ::movz { &movzx(@_); } |
| sub ::pushf { &pushfd; } |
| sub ::popf { &popfd; } |
| |
| # 3 argument instructions |
| sub ::movq |
| { my($p1,$p2,$optimize)=@_; |
| |
| if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/) |
| # movq between mmx registers can sink Intel CPUs |
| { &::pshufw($p1,$p2,0xe4); } |
| else |
| { &::generic("movq",@_); } |
| } |
| |
| # SSE>2 instructions |
| my %regrm = ( "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3, |
| "esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7 ); |
| sub ::pextrd |
| { my($dst,$src,$imm)=@_; |
| if ("$dst:$src" =~ /(e[a-dsd][ixp]):xmm([0-7])/) |
| { &::data_byte(0x66,0x0f,0x3a,0x16,0xc0|($2<<3)|$regrm{$1},$imm); } |
| else |
| { &::generic("pextrd",@_); } |
| } |
| |
| sub ::pinsrd |
| { my($dst,$src,$imm)=@_; |
| if ("$dst:$src" =~ /xmm([0-7]):(e[a-dsd][ixp])/) |
| { &::data_byte(0x66,0x0f,0x3a,0x22,0xc0|($1<<3)|$regrm{$2},$imm); } |
| else |
| { &::generic("pinsrd",@_); } |
| } |
| |
| sub ::pshufb |
| { my($dst,$src)=@_; |
| if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
| { &data_byte(0x66,0x0f,0x38,0x00,0xc0|($1<<3)|$2); } |
| else |
| { &::generic("pshufb",@_); } |
| } |
| |
| sub ::palignr |
| { my($dst,$src,$imm)=@_; |
| if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
| { &::data_byte(0x66,0x0f,0x3a,0x0f,0xc0|($1<<3)|$2,$imm); } |
| else |
| { &::generic("palignr",@_); } |
| } |
| |
| sub ::pclmulqdq |
| { my($dst,$src,$imm)=@_; |
| if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) |
| { &::data_byte(0x66,0x0f,0x3a,0x44,0xc0|($1<<3)|$2,$imm); } |
| else |
| { &::generic("pclmulqdq",@_); } |
| } |
| |
| sub ::rdrand |
| { my ($dst)=@_; |
| if ($dst =~ /(e[a-dsd][ixp])/) |
| { &::data_byte(0x0f,0xc7,0xf0|$regrm{$dst}); } |
| else |
| { &::generic("rdrand",@_); } |
| } |
| |
| sub rxb { |
| local *opcode=shift; |
| my ($dst,$src1,$src2,$rxb)=@_; |
| |
| $rxb|=0x7<<5; |
| $rxb&=~(0x04<<5) if($dst>=8); |
| $rxb&=~(0x01<<5) if($src1>=8); |
| $rxb&=~(0x02<<5) if($src2>=8); |
| push @opcode,$rxb; |
| } |
| |
| sub ::vprotd |
| { my $args=join(',',@_); |
| if ($args =~ /xmm([0-7]),xmm([0-7]),([x0-9a-f]+)/) |
| { my @opcode=(0x8f); |
| rxb(\@opcode,$1,$2,-1,0x08); |
| push @opcode,0x78,0xc2; |
| push @opcode,0xc0|($2&7)|(($1&7)<<3); # ModR/M |
| my $c=$3; |
| push @opcode,$c=~/^0/?oct($c):$c; |
| &::data_byte(@opcode); |
| } |
| else |
| { &::generic("vprotd",@_); } |
| } |
| |
| # label management |
| $lbdecor="L"; # local label decoration, set by package |
| $label="000"; |
| |
| sub ::islabel # see is argument is a known label |
| { my $i; |
| foreach $i (values %label) { return $i if ($i eq $_[0]); } |
| $label{$_[0]}; # can be undef |
| } |
| |
| sub ::label # instantiate a function-scope label |
| { if (!defined($label{$_[0]})) |
| { $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; } |
| $label{$_[0]}; |
| } |
| |
| sub ::LABEL # instantiate a file-scope label |
| { $label{$_[0]}=$_[1] if (!defined($label{$_[0]})); |
| $label{$_[0]}; |
| } |
| |
| sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); } |
| |
| sub ::set_label_B { push(@out,"@_:\n"); } |
| sub ::set_label |
| { my $label=&::label($_[0]); |
| &::align($_[1]) if ($_[1]>1); |
| &::set_label_B($label); |
| $label; |
| } |
| |
| sub ::wipe_labels # wipes function-scope labels |
| { foreach $i (keys %label) |
| { delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); } |
| } |
| |
| # subroutine management |
| sub ::function_begin |
| { &function_begin_B(@_); |
| $stack=4; |
| &push("ebp"); |
| &push("ebx"); |
| &push("esi"); |
| &push("edi"); |
| } |
| |
| sub ::function_end |
| { &pop("edi"); |
| &pop("esi"); |
| &pop("ebx"); |
| &pop("ebp"); |
| &ret(); |
| &function_end_B(@_); |
| $stack=0; |
| &wipe_labels(); |
| } |
| |
| sub ::function_end_A |
| { &pop("edi"); |
| &pop("esi"); |
| &pop("ebx"); |
| &pop("ebp"); |
| &ret(); |
| $stack+=16; # readjust esp as if we didn't pop anything |
| } |
| |
| sub ::asciz |
| { my @str=unpack("C*",shift); |
| push @str,0; |
| while ($#str>15) { |
| &data_byte(@str[0..15]); |
| foreach (0..15) { shift @str; } |
| } |
| &data_byte(@str) if (@str); |
| } |
| |
| sub ::asm_finish |
| { &file_end(); |
| print "#if defined(__i386__)\n"; |
| print @out; |
| print "#endif"; |
| } |
| |
| sub ::asm_init |
| { my ($type,$fn,$cpu)=@_; |
| |
| $filename=$fn; |
| $i386=$cpu; |
| |
| $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=$android=0; |
| if (($type eq "elf")) |
| { $elf=1; require "x86gas.pl"; } |
| elsif (($type eq "a\.out")) |
| { $aout=1; require "x86gas.pl"; } |
| elsif (($type eq "coff" or $type eq "gaswin")) |
| { $coff=1; require "x86gas.pl"; } |
| elsif (($type eq "win32n")) |
| { $win32=1; require "x86nasm.pl"; } |
| elsif (($type eq "nw-nasm")) |
| { $netware=1; require "x86nasm.pl"; } |
| #elsif (($type eq "nw-mwasm")) |
| #{ $netware=1; $mwerks=1; require "x86nasm.pl"; } |
| elsif (($type eq "win32")) |
| { $win32=1; require "x86masm.pl"; } |
| elsif (($type eq "macosx")) |
| { $aout=1; $macosx=1; require "x86gas.pl"; } |
| elsif (($type eq "android")) |
| { $elf=1; $android=1; require "x86gas.pl"; } |
| else |
| { print STDERR <<"EOF"; |
| Pick one target type from |
| elf - Linux, FreeBSD, Solaris x86, etc. |
| a.out - DJGPP, elder OpenBSD, etc. |
| coff - GAS/COFF such as Win32 targets |
| win32n - Windows 95/Windows NT NASM format |
| nw-nasm - NetWare NASM format |
| macosx - Mac OS X |
| EOF |
| exit(1); |
| } |
| |
| $pic=0; |
| for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); } |
| |
| $filename =~ s/\.pl$//; |
| &file($filename); |
| } |
| |
| sub ::hidden {} |
| |
| 1; |