freeswan/libcrypto/perlasm/x86unix.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86unix;
   4
   5 $label="L000";
   6
   7 $align=($main::aout)?"4":"16";
   8 $under=($main::aout)?"_":"";
   9 $com_start=($main::sol)?"/":"#";
  10
  11 sub main::asm_init_output { @out=(); }
  12 sub main::asm_get_output { return(@out); }
  13 sub main::get_labels { return(@labels); }
  14 sub main::external_label { push(@labels,@_); }
  15
  16 if ($main::cpp)
  17         {
  18         $align="ALIGN";
  19         $under="";
  20         $com_start='/*';
  21         $com_end='*/';
  22         }
  23
  24 %lb=(   'eax',  '%al',
  25         'ebx',  '%bl',
  26         'ecx',  '%cl',
  27         'edx',  '%dl',
  28         'ax',   '%al',
  29         'bx',   '%bl',
  30         'cx',   '%cl',
  31         'dx',   '%dl',
  32         );
  33
  34 %hb=(   'eax',  '%ah',
  35         'ebx',  '%bh',
  36         'ecx',  '%ch',
  37         'edx',  '%dh',
  38         'ax',   '%ah',
  39         'bx',   '%bh',
  40         'cx',   '%ch',
  41         'dx',   '%dh',
  42         );
  43
  44 %regs=( 'eax',  '%eax',
  45         'ebx',  '%ebx',
  46         'ecx',  '%ecx',
  47         'edx',  '%edx',
  48         'esi',  '%esi',
  49         'edi',  '%edi',
  50         'ebp',  '%ebp',
  51         'esp',  '%esp',
  52         'mm0',  '%mm0',
  53         'mm1',  '%mm1',
  54         );
  55
  56 %reg_val=(
  57         'eax',  0x00,
  58         'ebx',  0x03,
  59         'ecx',  0x01,
  60         'edx',  0x02,
  61         'esi',  0x06,
  62         'edi',  0x07,
  63         'ebp',  0x05,
  64         'esp',  0x04,
  65         );
  66
  67 sub main::LB
  68         {
  69         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  70         return($lb{$_[0]});
  71         }
  72
  73 sub main::HB
  74         {
  75         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  76         return($hb{$_[0]});
  77         }
  78
  79 sub main::DWP
  80         {
  81         local($addr,$reg1,$reg2,$idx)=@_;
  82
  83         $ret="";
  84         $addr =~ s/(^|[+ \t])([A-Za-z_]+[A-Za-z0-9_]+)($|[+ \t])/$1$under$2$3/;
  85         $reg1="$regs{$reg1}" if defined($regs{$reg1});
  86         $reg2="$regs{$reg2}" if defined($regs{$reg2});
  87         $ret.=$addr if ($addr ne "") && ($addr ne 0);
  88         if ($reg2 ne "")
  89                 {
  90                 if($idx ne "")
  91                     { $ret.="($reg1,$reg2,$idx)"; }
  92                 else
  93                     { $ret.="($reg1,$reg2)"; }
  94                 }
  95         else
  96                 { $ret.="($reg1)" }
  97         return($ret);
  98         }
  99
 100 sub main::BP
 101         {
 102         return(&main::DWP(@_));
 103         }
 104
 105 sub main::BC
 106         {
 107         return @_;
 108         }
 109
 110 sub main::DWC
 111         {
 112         return @_;
 113         }
 114
 115 #sub main::BP
 116 #       {
 117 #       local($addr,$reg1,$reg2,$idx)=@_;
 118 #
 119 #       $ret="";
 120 #
 121 #       $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
 122 #       $reg1="$regs{$reg1}" if defined($regs{$reg1});
 123 #       $reg2="$regs{$reg2}" if defined($regs{$reg2});
 124 #       $ret.=$addr if ($addr ne "") && ($addr ne 0);
 125 #       if ($reg2 ne "")
 126 #               { $ret.="($reg1,$reg2,$idx)"; }
 127 #       else
 128 #               { $ret.="($reg1)" }
 129 #       return($ret);
 130 #       }
 131
 132 sub main::mov   { &out2("movl",@_); }
 133 sub main::movb  { &out2("movb",@_); }
 134 sub main::and   { &out2("andl",@_); }
 135 sub main::or    { &out2("orl",@_); }
 136 sub main::shl   { &out2("sall",@_); }
 137 sub main::shr   { &out2("shrl",@_); }
 138 sub main::xor   { &out2("xorl",@_); }
 139 sub main::xorb  { &out2("xorb",@_); }
 140 sub main::add   { &out2("addl",@_); }
 141 sub main::adc   { &out2("adcl",@_); }
 142 sub main::sub   { &out2("subl",@_); }
 143 sub main::rotl  { &out2("roll",@_); }
 144 sub main::rotr  { &out2("rorl",@_); }
 145 sub main::exch  { &out2("xchg",@_); }
 146 sub main::cmp   { &out2("cmpl",@_); }
 147 sub main::lea   { &out2("leal",@_); }
 148 sub main::mul   { &out1("mull",@_); }
 149 sub main::div   { &out1("divl",@_); }
 150 sub main::jmp   { &out1("jmp",@_); }
 151 sub main::jmp_ptr { &out1p("jmp",@_); }
 152 sub main::je    { &out1("je",@_); }
 153 sub main::jle   { &out1("jle",@_); }
 154 sub main::jne   { &out1("jne",@_); }
 155 sub main::jnz   { &out1("jnz",@_); }
 156 sub main::jz    { &out1("jz",@_); }
 157 sub main::jge   { &out1("jge",@_); }
 158 sub main::jl    { &out1("jl",@_); }
 159 sub main::jb    { &out1("jb",@_); }
 160 sub main::jc    { &out1("jc",@_); }
 161 sub main::jnc   { &out1("jnc",@_); }
 162 sub main::jno   { &out1("jno",@_); }
 163 sub main::dec   { &out1("decl",@_); }
 164 sub main::inc   { &out1("incl",@_); }
 165 sub main::push  { &out1("pushl",@_); $stack+=4; }
 166 sub main::pop   { &out1("popl",@_); $stack-=4; }
 167 sub main::not   { &out1("notl",@_); }
 168 sub main::call  { &out1("call",$under.$_[0]); }
 169 sub main::ret   { &out0("ret"); }
 170 sub main::nop   { &out0("nop"); }
 171
 172 # The bswapl instruction is new for the 486. Emulate if i386.
 173 sub main::bswap
 174         {
 175         if ($main::i386)
 176                 {
 177                 &main::comment("bswapl @_");
 178                 &main::exch(main::HB(@_),main::LB(@_));
 179                 &main::rotr(@_,16);
 180                 &main::exch(main::HB(@_),main::LB(@_));
 181                 }
 182         else
 183                 {
 184                 &out1("bswapl",@_);
 185                 }
 186         }
 187
 188 sub out2
 189         {
 190         local($name,$p1,$p2)=@_;
 191         local($l,$ll,$t);
 192         local(%special)=(       "roll",0xD1C0,"rorl",0xD1C8,
 193                                 "rcll",0xD1D0,"rcrl",0xD1D8,
 194                                 "shll",0xD1E0,"shrl",0xD1E8,
 195                                 "sarl",0xD1F8);
 196
 197         if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
 198                 {
 199                 $op=$special{$name}|$reg_val{$p1};
 200                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 201                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 202                 push(@out,$tmp1);
 203                 push(@out,$tmp2);
 204
 205                 $p2=&conv($p2);
 206                 $p1=&conv($p1);
 207                 &main::comment("$name $p2 $p1");
 208                 return;
 209                 }
 210
 211         push(@out,"\t$name\t");
 212         $t=&conv($p2).",";
 213         $l=length($t);
 214         push(@out,$t);
 215         $ll=4-($l+9)/8;
 216         $tmp1=sprintf("\t" x $ll);
 217         push(@out,$tmp1);
 218         push(@out,&conv($p1)."\n");
 219         }
 220
 221 sub out1
 222         {
 223         local($name,$p1)=@_;
 224         local($l,$t);
 225         local(%special)=("bswapl",0x0FC8);
 226
 227         if ((defined($special{$name})) && defined($regs{$p1}))
 228                 {
 229                 $op=$special{$name}|$reg_val{$p1};
 230                 $tmp1=sprintf(".byte %d\n",($op>>8)&0xff);
 231                 $tmp2=sprintf(".byte %d\t",$op     &0xff);
 232                 push(@out,$tmp1);
 233                 push(@out,$tmp2);
 234
 235                 $p2=&conv($p2);
 236                 $p1=&conv($p1);
 237                 &main::comment("$name $p2 $p1");
 238                 return;
 239                 }
 240
 241         push(@out,"\t$name\t".&conv($p1)."\n");
 242         }
 243
 244 sub out1p
 245         {
 246         local($name,$p1)=@_;
 247         local($l,$t);
 248
 249         push(@out,"\t$name\t*".&conv($p1)."\n");
 250         }
 251
 252 sub out0
 253         {
 254         push(@out,"\t$_[0]\n");
 255         }
 256
 257 sub conv
 258         {
 259         local($p)=@_;
 260
 261 #       $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 262
 263         $p=$regs{$p} if (defined($regs{$p}));
 264
 265         $p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
 266         $p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
 267         return $p;
 268         }
 269
 270 sub main::file
 271         {
 272         local($file)=@_;
 273
 274         local($tmp)=<<"EOF";
 275         .file   "$file.s"
 276         .version        "01.01"
 277 gcc2_compiled.:
 278 EOF
 279         push(@out,$tmp);
 280         }
 281
 282 sub main::function_begin
 283         {
 284         local($func)=@_;
 285
 286         &main::external_label($func);
 287         $func=$under.$func;
 288
 289         local($tmp)=<<"EOF";
 290 .text
 291         .align $align
 292 .globl $func
 293 EOF
 294         push(@out,$tmp);
 295         if ($main::cpp)
 296                 { $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
 297         elsif ($main::gaswin)
 298                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 299         else    { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
 300         push(@out,"$func:\n");
 301         $tmp=<<"EOF";
 302         pushl   %ebp
 303         pushl   %ebx
 304         pushl   %esi
 305         pushl   %edi
 306
 307 EOF
 308         push(@out,$tmp);
 309         $stack=20;
 310         }
 311
 312 sub main::function_begin_B
 313         {
 314         local($func,$extra)=@_;
 315
 316         &main::external_label($func);
 317         $func=$under.$func;
 318
 319         local($tmp)=<<"EOF";
 320 .text
 321         .align $align
 322 .globl $func
 323 EOF
 324         push(@out,$tmp);
 325         if ($main::cpp)
 326                 { push(@out,"\tTYPE($func,\@function)\n"); }
 327         elsif ($main::gaswin)
 328                 { $tmp=push(@out,"\t.def\t$func;\t.scl\t2;\t.type\t32;\t.endef\n"); }
 329         else    { push(@out,"\t.type    $func,\@function\n"); }
 330         push(@out,"$func:\n");
 331         $stack=4;
 332         }
 333
 334 sub main::function_end
 335         {
 336         local($func)=@_;
 337
 338         $func=$under.$func;
 339
 340         local($tmp)=<<"EOF";
 341         popl    %edi
 342         popl    %esi
 343         popl    %ebx
 344         popl    %ebp
 345         ret
 346 .${func}_end:
 347 EOF
 348         push(@out,$tmp);
 349         if ($main::cpp)
 350                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
 351         elsif ($main::gaswin)
 352                 { $tmp=push(@out,"\t.align 4\n"); }
 353         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
 354         push(@out,".ident       \"$func\"\n");
 355         $stack=0;
 356         %label=();
 357         }
 358
 359 sub main::function_end_A
 360         {
 361         local($func)=@_;
 362
 363         local($tmp)=<<"EOF";
 364         popl    %edi
 365         popl    %esi
 366         popl    %ebx
 367         popl    %ebp
 368         ret
 369 EOF
 370         push(@out,$tmp);
 371         }
 372
 373 sub main::function_end_B
 374         {
 375         local($func)=@_;
 376
 377         $func=$under.$func;
 378
 379         push(@out,".L_${func}_end:\n");
 380         if ($main::cpp)
 381                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
 382         elsif ($main::gaswin)
 383                 { push(@out,"\t.align 4\n"); }
 384         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
 385         push(@out,".ident       \"desasm.pl\"\n");
 386         $stack=0;
 387         %label=();
 388         }
 389
 390 sub main::wparam
 391         {
 392         local($num)=@_;
 393
 394         return(&main::DWP($stack+$num*4,"esp","",0));
 395         }
 396
 397 sub main::stack_push
 398         {
 399         local($num)=@_;
 400         $stack+=$num*4;
 401         &main::sub("esp",$num*4);
 402         }
 403
 404 sub main::stack_pop
 405         {
 406         local($num)=@_;
 407         $stack-=$num*4;
 408         &main::add("esp",$num*4);
 409         }
 410
 411 sub main::swtmp
 412         {
 413         return(&main::DWP($_[0]*4,"esp","",0));
 414         }
 415
 416 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 417 #sub main::wtmp
 418 #       {
 419 #       local($num)=@_;
 420 #
 421 #       return(&main::DWP(-($num+1)*4,"esp","",0));
 422 #       }
 423
 424 sub main::comment
 425         {
 426         foreach (@_)
 427                 {
 428                 if (/^\s*$/)
 429                         { push(@out,"\n"); }
 430                 else
 431                         { push(@out,"\t$com_start $_ $com_end\n"); }
 432                 }
 433         }
 434
 435 sub main::label
 436         {
 437         if (!defined($label{$_[0]}))
 438                 {
 439                 $label{$_[0]}=".${label}${_[0]}";
 440                 $label++;
 441                 }
 442         return($label{$_[0]});
 443         }
 444
 445 sub main::set_label
 446         {
 447         if (!defined($label{$_[0]}))
 448                 {
 449                 $label{$_[0]}=".${label}${_[0]}";
 450                 $label++;
 451                 }
 452         push(@out,".align $align\n") if ($_[1] != 0);
 453         push(@out,"$label{$_[0]}:\n");
 454         }
 455
 456 sub main::file_end
 457         {
 458         }
 459
 460 sub main::data_word
 461         {
 462         push(@out,"\t.long $_[0]\n");
 463         }
 464
 465 ##
 466 ## Additional functions required for MMX and other ops
 467 ##
 468 sub main::testb { &out2('testb', @_) }
 469 sub main::movzx { &out2('movzx', @_) }
 470 sub main::movd { &out2('movd', @_) }
 471 sub main::emms { &out0('emms', @_) }