1#!/usr/bin/env perl 2 3# require 'x86asm.pl'; 4# &asm_init(<flavor>,"des-586.pl"[,$i386only]); 5# &function_begin("foo"); 6# ... 7# &function_end("foo"); 8# &asm_finish 9 10$out=(); 11$i386=0; 12 13# AUTOLOAD is this context has quite unpleasant side effect, namely 14# that typos in function calls effectively go to assembler output, 15# but on the pros side we don't have to implement one subroutine per 16# each opcode... 17sub ::AUTOLOAD 18{ my $opcode = $AUTOLOAD; 19 20 die "more than 4 arguments passed to $opcode" if ($#_>3); 21 22 $opcode =~ s/.*:://; 23 if ($opcode =~ /^push/) { $stack+=4; } 24 elsif ($opcode =~ /^pop/) { $stack-=4; } 25 26 &generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD"; 27} 28 29sub ::emit 30{ my $opcode=shift; 31 32 if ($#_==-1) { push(@out,"\t$opcode\n"); } 33 else { push(@out,"\t$opcode\t".join(',',@_)."\n"); } 34} 35 36sub ::LB 37{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'"; 38 $1."l"; 39} 40sub ::HB 41{ $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'"; 42 $1."h"; 43} 44sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); } 45sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); } 46sub ::blindpop { &pop($_[0]); $stack+=4; } 47sub ::wparam { &DWP($stack+4*$_[0],"esp"); } 48sub ::swtmp { &DWP(4*$_[0],"esp"); } 49 50sub ::bswap 51{ if ($i386) # emulate bswap for i386 52 { &comment("bswap @_"); 53 &xchg(&HB(@_),&LB(@_)); 54 &ror (@_,16); 55 &xchg(&HB(@_),&LB(@_)); 56 } 57 else 58 { &generic("bswap",@_); } 59} 60# These are made-up opcodes introduced over the years essentially 61# by ignorance, just alias them to real ones... 62sub ::movb { &mov(@_); } 63sub ::xorb { &xor(@_); } 64sub ::rotl { &rol(@_); } 65sub ::rotr { &ror(@_); } 66sub ::exch { &xchg(@_); } 67sub ::halt { &hlt; } 68sub ::movz { &movzx(@_); } 69sub ::pushf { &pushfd; } 70sub ::popf { &popfd; } 71 72# 3 argument instructions 73sub ::movq 74{ my($p1,$p2,$optimize)=@_; 75 76 if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/) 77 # movq between mmx registers can sink Intel CPUs 78 { &::pshufw($p1,$p2,0xe4); } 79 else 80 { &::generic("movq",@_); } 81} 82 83# SSE>2 instructions 84my %regrm = ( "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3, 85 "esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7 ); 86sub ::pextrd 87{ my($dst,$src,$imm)=@_; 88 if ("$dst:$src" =~ /(e[a-dsd][ixp]):xmm([0-7])/) 89 { &::data_byte(0x66,0x0f,0x3a,0x16,0xc0|($2<<3)|$regrm{$1},$imm); } 90 else 91 { &::generic("pextrd",@_); } 92} 93 94sub ::pinsrd 95{ my($dst,$src,$imm)=@_; 96 if ("$dst:$src" =~ /xmm([0-7]):(e[a-dsd][ixp])/) 97 { &::data_byte(0x66,0x0f,0x3a,0x22,0xc0|($1<<3)|$regrm{$2},$imm); } 98 else 99 { &::generic("pinsrd",@_); } 100} 101 102sub ::pshufb 103{ my($dst,$src)=@_; 104 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) 105 { &data_byte(0x66,0x0f,0x38,0x00,0xc0|($1<<3)|$2); } 106 else 107 { &::generic("pshufb",@_); } 108} 109 110sub ::palignr 111{ my($dst,$src,$imm)=@_; 112 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) 113 { &::data_byte(0x66,0x0f,0x3a,0x0f,0xc0|($1<<3)|$2,$imm); } 114 else 115 { &::generic("palignr",@_); } 116} 117 118sub ::pclmulqdq 119{ my($dst,$src,$imm)=@_; 120 if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/) 121 { &::data_byte(0x66,0x0f,0x3a,0x44,0xc0|($1<<3)|$2,$imm); } 122 else 123 { &::generic("pclmulqdq",@_); } 124} 125 126sub ::rdrand 127{ my ($dst)=@_; 128 if ($dst =~ /(e[a-dsd][ixp])/) 129 { &::data_byte(0x0f,0xc7,0xf0|$regrm{$dst}); } 130 else 131 { &::generic("rdrand",@_); } 132} 133 134sub rxb { 135 local *opcode=shift; 136 my ($dst,$src1,$src2,$rxb)=@_; 137 138 $rxb|=0x7<<5; 139 $rxb&=~(0x04<<5) if($dst>=8); 140 $rxb&=~(0x01<<5) if($src1>=8); 141 $rxb&=~(0x02<<5) if($src2>=8); 142 push @opcode,$rxb; 143} 144 145sub ::vprotd 146{ my $args=join(',',@_); 147 if ($args =~ /xmm([0-7]),xmm([0-7]),([x0-9a-f]+)/) 148 { my @opcode=(0x8f); 149 rxb(\@opcode,$1,$2,-1,0x08); 150 push @opcode,0x78,0xc2; 151 push @opcode,0xc0|($2&7)|(($1&7)<<3); # ModR/M 152 my $c=$3; 153 push @opcode,$c=~/^0/?oct($c):$c; 154 &::data_byte(@opcode); 155 } 156 else 157 { &::generic("vprotd",@_); } 158} 159 160# label management 161$lbdecor="L"; # local label decoration, set by package 162$label="000"; 163 164sub ::islabel # see is argument is a known label 165{ my $i; 166 foreach $i (values %label) { return $i if ($i eq $_[0]); } 167 $label{$_[0]}; # can be undef 168} 169 170sub ::label # instantiate a function-scope label 171{ if (!defined($label{$_[0]})) 172 { $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; } 173 $label{$_[0]}; 174} 175 176sub ::LABEL # instantiate a file-scope label 177{ $label{$_[0]}=$_[1] if (!defined($label{$_[0]})); 178 $label{$_[0]}; 179} 180 181sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); } 182 183sub ::set_label_B { push(@out,"@_:\n"); } 184sub ::set_label 185{ my $label=&::label($_[0]); 186 &::align($_[1]) if ($_[1]>1); 187 &::set_label_B($label); 188 $label; 189} 190 191sub ::wipe_labels # wipes function-scope labels 192{ foreach $i (keys %label) 193 { delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); } 194} 195 196# subroutine management 197sub ::function_begin 198{ &function_begin_B(@_); 199 $stack=4; 200 &push("ebp"); 201 &push("ebx"); 202 &push("esi"); 203 &push("edi"); 204} 205 206sub ::function_end 207{ &pop("edi"); 208 &pop("esi"); 209 &pop("ebx"); 210 &pop("ebp"); 211 &ret(); 212 &function_end_B(@_); 213 $stack=0; 214 &wipe_labels(); 215} 216 217sub ::function_end_A 218{ &pop("edi"); 219 &pop("esi"); 220 &pop("ebx"); 221 &pop("ebp"); 222 &ret(); 223 $stack+=16; # readjust esp as if we didn't pop anything 224} 225 226sub ::asciz 227{ my @str=unpack("C*",shift); 228 push @str,0; 229 while ($#str>15) { 230 &data_byte(@str[0..15]); 231 foreach (0..15) { shift @str; } 232 } 233 &data_byte(@str) if (@str); 234} 235 236sub ::asm_finish 237{ &file_end(); 238 print "#if defined(__i386__)\n" unless $win32; 239 print @out; 240 print "#endif\n" unless $win32; 241} 242 243sub ::asm_init 244{ my ($type,$fn,$cpu)=@_; 245 246 $filename=$fn; 247 $i386=$cpu; 248 249 $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=$android=0; 250 if (($type eq "elf")) 251 { $elf=1; require "x86gas.pl"; } 252 elsif (($type eq "elf-1")) 253 { $elf=-1; require "x86gas.pl"; } 254 elsif (($type eq "a\.out")) 255 { $aout=1; require "x86gas.pl"; } 256 elsif (($type eq "coff" or $type eq "gaswin")) 257 { $coff=1; require "x86gas.pl"; } 258 elsif (($type eq "win32n")) 259 { $win32=1; require "x86nasm.pl"; } 260 elsif (($type eq "nw-nasm")) 261 { $netware=1; require "x86nasm.pl"; } 262 #elsif (($type eq "nw-mwasm")) 263 #{ $netware=1; $mwerks=1; require "x86nasm.pl"; } 264 elsif (($type eq "win32")) 265 { $win32=1; require "x86masm.pl"; } 266 elsif (($type eq "macosx")) 267 { $aout=1; $macosx=1; require "x86gas.pl"; } 268 elsif (($type eq "android")) 269 { $elf=1; $android=1; require "x86gas.pl"; } 270 else 271 { print STDERR <<"EOF"; 272Pick one target type from 273 elf - Linux, FreeBSD, Solaris x86, etc. 274 a.out - DJGPP, elder OpenBSD, etc. 275 coff - GAS/COFF such as Win32 targets 276 win32n - Windows 95/Windows NT NASM format 277 nw-nasm - NetWare NASM format 278 macosx - Mac OS X 279EOF 280 exit(1); 281 } 282 283 $pic=0; 284 for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); } 285 286 $filename =~ s/\.pl$//; 287 &file($filename); 288} 289 290sub ::hidden {} 291 2921; 293