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... 17 sub ::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 29 sub ::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 36 sub ::LB 37 { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'"; 38 $1."l"; 39 } 40 sub ::HB 41 { $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'"; 42 $1."h"; 43 } 44 sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num); } 45 sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num); } 46 sub ::blindpop { &pop($_[0]); $stack+=4; } 47 sub ::wparam { &DWP($stack+4*$_[0],"esp"); } 48 sub ::swtmp { &DWP(4*$_[0],"esp"); } 49 50 sub ::bswap 51 { if ($i386) # emulate bswap for i386 52 { &comment("bswap @_"); 53 &xchg(&HB(@_),&LB(@_)); 54 &ror (@_,16); 55 &xchg(&HB(@_),&LB(@_)); 56 } 57 else 58 { &generic("bswap",@_); } 59 } 60 # These are made-up opcodes introduced over the years essentially 61 # by ignorance, just alias them to real ones... 62 sub ::movb { &mov(@_); } 63 sub ::xorb { &xor(@_); } 64 sub ::rotl { &rol(@_); } 65 sub ::rotr { &ror(@_); } 66 sub ::exch { &xchg(@_); } 67 sub ::halt { &hlt; } 68 sub ::movz { &movzx(@_); } 69 sub ::pushf { &pushfd; } 70 sub ::popf { &popfd; } 71 72 # 3 argument instructions 73 sub ::movq 74 { my($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 84 my %regrm = ( "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3, 85 "esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7 ); 86 sub ::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 94 sub ::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 } 101 102 sub ::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)|$2); } 106 else 107 { &::generic("pshufb",@_); } 108 } 109 110 sub ::palignr 111 { my($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 } 117 118 sub ::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 } 125 126 sub ::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 } 133 134 # label management 135 $lbdecor="L"; # local label decoration, set by package 136 $label="000"; 137 138 sub ::islabel # see is argument is a known label 139 { my $i; 140 foreach $i (values %label) { return $i if ($i eq $_[0]); } 141 $label{$_[0]}; # can be undef 142 } 143 144 sub ::label # instantiate a function-scope label 145 { if (!defined($label{$_[0]})) 146 { $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++; } 147 $label{$_[0]}; 148 } 149 150 sub ::LABEL # instantiate a file-scope label 151 { $label{$_[0]}=$_[1] if (!defined($label{$_[0]})); 152 $label{$_[0]}; 153 } 154 155 sub ::static_label { &::LABEL($_[0],$lbdecor.$_[0]); } 156 157 sub ::set_label_B { push(@out,"@_:\n"); } 158 sub ::set_label 159 { my $label=&::label($_[0]); 160 &::align($_[1]) if ($_[1]>1); 161 &::set_label_B($label); 162 $label; 163 } 164 165 sub ::wipe_labels # wipes function-scope labels 166 { foreach $i (keys %label) 167 { delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); } 168 } 169 170 # subroutine management 171 sub ::function_begin 172 { &function_begin_B(@_); 173 $stack=4; 174 &push("ebp"); 175 &push("ebx"); 176 &push("esi"); 177 &push("edi"); 178 } 179 180 sub ::function_end 181 { &pop("edi"); 182 &pop("esi"); 183 &pop("ebx"); 184 &pop("ebp"); 185 &ret(); 186 &function_end_B(@_); 187 $stack=0; 188 &wipe_labels(); 189 } 190 191 sub ::function_end_A 192 { &pop("edi"); 193 &pop("esi"); 194 &pop("ebx"); 195 &pop("ebp"); 196 &ret(); 197 $stack+=16; # readjust esp as if we didn't pop anything 198 } 199 200 sub ::asciz 201 { my @str=unpack("C*",shift); 202 push @str,0; 203 while ($#str>15) { 204 &data_byte(@str[0..15]); 205 foreach (0..15) { shift @str; } 206 } 207 &data_byte(@str) if (@str); 208 } 209 210 sub ::asm_finish 211 { &file_end(); 212 print @out; 213 } 214 215 sub ::asm_init 216 { my ($type,$fn,$cpu)=@_; 217 218 $filename=$fn; 219 $i386=$cpu; 220 221 $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=$android=0; 222 if (($type eq "elf")) 223 { $elf=1; require "x86gas.pl"; } 224 elsif (($type eq "a\.out")) 225 { $aout=1; require "x86gas.pl"; } 226 elsif (($type eq "coff" or $type eq "gaswin")) 227 { $coff=1; require "x86gas.pl"; } 228 elsif (($type eq "win32n")) 229 { $win32=1; require "x86nasm.pl"; } 230 elsif (($type eq "nw-nasm")) 231 { $netware=1; require "x86nasm.pl"; } 232 #elsif (($type eq "nw-mwasm")) 233 #{ $netware=1; $mwerks=1; require "x86nasm.pl"; } 234 elsif (($type eq "win32")) 235 { $win32=1; require "x86masm.pl"; } 236 elsif (($type eq "macosx")) 237 { $aout=1; $macosx=1; require "x86gas.pl"; } 238 elsif (($type eq "android")) 239 { $elf=1; $android=1; require "x86gas.pl"; } 240 else 241 { print STDERR <<"EOF"; 242 Pick one target type from 243 elf - Linux, FreeBSD, Solaris x86, etc. 244 a.out - DJGPP, elder OpenBSD, etc. 245 coff - GAS/COFF such as Win32 targets 246 win32n - Windows 95/Windows NT NASM format 247 nw-nasm - NetWare NASM format 248 macosx - Mac OS X 249 EOF 250 exit(1); 251 } 252 253 $pic=0; 254 for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); } 255 256 $filename =~ s/\.pl$//; 257 &file($filename); 258 } 259 260 1; 261
