crypto/perlasm/x86nasm.pl

   1 #!/usr/local/bin/perl
   2
   3 package x86nasm;
   4
   5 $label="L000";
   6 $under=($main'netware)?'':'_';
   7
   8 %lb=(   'eax',  'al',
   9         'ebx',  'bl',
  10         'ecx',  'cl',
  11         'edx',  'dl',
  12         'ax',   'al',
  13         'bx',   'bl',
  14         'cx',   'cl',
  15         'dx',   'dl',
  16         );
  17
  18 %hb=(   'eax',  'ah',
  19         'ebx',  'bh',
  20         'ecx',  'ch',
  21         'edx',  'dh',
  22         'ax',   'ah',
  23         'bx',   'bh',
  24         'cx',   'ch',
  25         'dx',   'dh',
  26         );
  27
  28 sub main'asm_init_output { @out=(); }
  29 sub main'asm_get_output { return(@out); }
  30 sub main'get_labels { return(@labels); }
  31
  32 sub main'external_label
  33 {
  34         push(@labels,@_);
  35         foreach (@_) {
  36                 push(@out,".") if ($main'mwerks);
  37                 push(@out, "extern\t${under}$_\n");
  38         }
  39 }
  40
  41 sub main'LB
  42         {
  43         (defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
  44         return($lb{$_[0]});
  45         }
  46
  47 sub main'HB
  48         {
  49         (defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
  50         return($hb{$_[0]});
  51         }
  52
  53 sub main'BP
  54         {
  55         &get_mem("BYTE",@_);
  56         }
  57
  58 sub main'DWP
  59         {
  60         &get_mem("DWORD",@_);
  61         }
  62
  63 sub main'QWP
  64         {
  65         &get_mem("",@_);
  66         }
  67
  68 sub main'BC
  69         {
  70         return (($main'mwerks)?"":"BYTE ")."@_";
  71         }
  72
  73 sub main'DWC
  74         {
  75         return (($main'mwerks)?"":"DWORD ")."@_";
  76         }
  77
  78 sub main'stack_push
  79         {
  80         my($num)=@_;
  81         $stack+=$num*4;
  82         &main'sub("esp",$num*4);
  83         }
  84
  85 sub main'stack_pop
  86         {
  87         my($num)=@_;
  88         $stack-=$num*4;
  89         &main'add("esp",$num*4);
  90         }
  91
  92 sub get_mem
  93         {
  94         my($size,$addr,$reg1,$reg2,$idx)=@_;
  95         my($t,$post);
  96         my($ret)=$size;
  97         if ($ret ne "")
  98                 {
  99                 $ret .= " PTR" if ($main'mwerks);
 100                 $ret .= " ";
 101                 }
 102         $ret .= "[";
 103         $addr =~ s/^\s+//;
 104         if ($addr =~ /^(.+)\+(.+)$/)
 105                 {
 106                 $reg2=&conv($1);
 107                 $addr="$under$2";
 108                 }
 109         elsif ($addr =~ /^[_a-zA-Z]/)
 110                 {
 111                 $addr="$under$addr";
 112                 }
 113
 114         if ($addr =~ /^.+\-.+$/) { $addr="($addr)"; }
 115
 116         $reg1="$regs{$reg1}" if defined($regs{$reg1});
 117         $reg2="$regs{$reg2}" if defined($regs{$reg2});
 118         if (($addr ne "") && ($addr ne 0))
 119                 {
 120                 if ($addr !~ /^-/)
 121                         { $ret.="${addr}+"; }
 122                 else    { $post=$addr; }
 123                 }
 124         if ($reg2 ne "")
 125                 {
 126                 $t="";
 127                 $t="*$idx" if ($idx != 0);
 128                 $reg1="+".$reg1 if ("$reg1$post" ne "");
 129                 $ret.="$reg2$t$reg1$post]";
 130                 }
 131         else
 132                 {
 133                 $ret.="$reg1$post]"
 134                 }
 135         $ret =~ s/\+\]/]/; # in case $addr was the only argument
 136         return($ret);
 137         }
 138
 139 sub main'mov    { &out2("mov",@_); }
 140 sub main'movb   { &out2("mov",@_); }
 141 sub main'and    { &out2("and",@_); }
 142 sub main'or     { &out2("or",@_); }
 143 sub main'shl    { &out2("shl",@_); }
 144 sub main'shr    { &out2("shr",@_); }
 145 sub main'xor    { &out2("xor",@_); }
 146 sub main'xorb   { &out2("xor",@_); }
 147 sub main'add    { &out2("add",@_); }
 148 sub main'adc    { &out2("adc",@_); }
 149 sub main'sub    { &out2("sub",@_); }
 150 sub main'sbb    { &out2("sbb",@_); }
 151 sub main'rotl   { &out2("rol",@_); }
 152 sub main'rotr   { &out2("ror",@_); }
 153 sub main'exch   { &out2("xchg",@_); }
 154 sub main'cmp    { &out2("cmp",@_); }
 155 sub main'lea    { &out2("lea",@_); }
 156 sub main'mul    { &out1("mul",@_); }
 157 sub main'div    { &out1("div",@_); }
 158 sub main'dec    { &out1("dec",@_); }
 159 sub main'inc    { &out1("inc",@_); }
 160 sub main'jmp    { &out1("jmp",@_); }
 161 sub main'jmp_ptr { &out1p("jmp",@_); }
 162
 163 # This is a bit of a kludge: declare all branches as NEAR.
 164 $near=($main'mwerks)?'':'NEAR';
 165 sub main'je     { &out1("je $near",@_); }
 166 sub main'jle    { &out1("jle $near",@_); }
 167 sub main'jz     { &out1("jz $near",@_); }
 168 sub main'jge    { &out1("jge $near",@_); }
 169 sub main'jl     { &out1("jl $near",@_); }
 170 sub main'ja     { &out1("ja $near",@_); }
 171 sub main'jae    { &out1("jae $near",@_); }
 172 sub main'jb     { &out1("jb $near",@_); }
 173 sub main'jbe    { &out1("jbe $near",@_); }
 174 sub main'jc     { &out1("jc $near",@_); }
 175 sub main'jnc    { &out1("jnc $near",@_); }
 176 sub main'jnz    { &out1("jnz $near",@_); }
 177 sub main'jne    { &out1("jne $near",@_); }
 178 sub main'jno    { &out1("jno $near",@_); }
 179
 180 sub main'push   { &out1("push",@_); $stack+=4; }
 181 sub main'pop    { &out1("pop",@_); $stack-=4; }
 182 sub main'pushf  { &out0("pushfd"); $stack+=4; }
 183 sub main'popf   { &out0("popfd"); $stack-=4; }
 184 sub main'bswap  { &out1("bswap",@_); &using486(); }
 185 sub main'not    { &out1("not",@_); }
 186 sub main'call   { &out1("call",($_[0]=~/^\@L/?'':$under).$_[0]); }
 187 sub main'ret    { &out0("ret"); }
 188 sub main'nop    { &out0("nop"); }
 189 sub main'test   { &out2("test",@_); }
 190 sub main'bt     { &out2("bt",@_); }
 191 sub main'leave  { &out0("leave"); }
 192 sub main'cpuid  { &out0("cpuid"); }
 193 sub main'rdtsc  { &out0("rdtsc"); }
 194 sub main'halt   { &out0("hlt"); }
 195
 196 # SSE2
 197 sub main'emms   { &out0("emms"); }
 198 sub main'movd   { &out2("movd",@_); }
 199 sub main'movq   { &out2("movq",@_); }
 200 sub main'movdqu { &out2("movdqu",@_); }
 201 sub main'movdqa { &out2("movdqa",@_); }
 202 sub main'movdq2q{ &out2("movdq2q",@_); }
 203 sub main'movq2dq{ &out2("movq2dq",@_); }
 204 sub main'paddq  { &out2("paddq",@_); }
 205 sub main'pmuludq{ &out2("pmuludq",@_); }
 206 sub main'psrlq  { &out2("psrlq",@_); }
 207 sub main'psllq  { &out2("psllq",@_); }
 208 sub main'pxor   { &out2("pxor",@_); }
 209 sub main'por    { &out2("por",@_); }
 210 sub main'pand   { &out2("pand",@_); }
 211
 212 sub out2
 213         {
 214         my($name,$p1,$p2)=@_;
 215         my($l,$t);
 216
 217         push(@out,"\t$name\t");
 218         if (!$main'mwerks and $name eq "lea")
 219                 {
 220                 $p1 =~ s/^[^\[]*\[/\[/;
 221                 $p2 =~ s/^[^\[]*\[/\[/;
 222                 }
 223         $t=&conv($p1).",";
 224         $l=length($t);
 225         push(@out,$t);
 226         $l=4-($l+9)/8;
 227         push(@out,"\t" x $l);
 228         push(@out,&conv($p2));
 229         push(@out,"\n");
 230         }
 231
 232 sub out0
 233         {
 234         my($name)=@_;
 235
 236         push(@out,"\t$name\n");
 237         }
 238
 239 sub out1
 240         {
 241         my($name,$p1)=@_;
 242         my($l,$t);
 243         push(@out,"\t$name\t".&conv($p1)."\n");
 244         }
 245
 246 sub conv
 247         {
 248         my($p)=@_;
 249         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 250         return $p;
 251         }
 252
 253 sub using486
 254         {
 255         return if $using486;
 256         $using486++;
 257         grep(s/\.386/\.486/,@out);
 258         }
 259
 260 sub main'file
 261         {
 262         push(@out,".") if ($main'mwerks);
 263         push(@out,"section\t.text\n");
 264         }
 265
 266 sub main'function_begin
 267         {
 268         my($func,$extra)=@_;
 269
 270         push(@labels,$func);
 271         my($tmp)=<<"EOF";
 272 global  $under$func
 273 $under$func:
 274         push    ebp
 275         push    ebx
 276         push    esi
 277         push    edi
 278 EOF
 279         push(@out,$tmp);
 280         $stack=20;
 281         }
 282
 283 sub main'function_begin_B
 284         {
 285         my($func,$extra)=@_;
 286         my($tmp)=<<"EOF";
 287 global  $under$func
 288 $under$func:
 289 EOF
 290         push(@out,$tmp);
 291         $stack=4;
 292         }
 293
 294 sub main'function_end
 295         {
 296         my($func)=@_;
 297
 298         my($tmp)=<<"EOF";
 299         pop     edi
 300         pop     esi
 301         pop     ebx
 302         pop     ebp
 303         ret
 304 EOF
 305         push(@out,$tmp);
 306         $stack=0;
 307         %label=();
 308         }
 309
 310 sub main'function_end_B
 311         {
 312         $stack=0;
 313         %label=();
 314         }
 315
 316 sub main'function_end_A
 317         {
 318         my($func)=@_;
 319
 320         my($tmp)=<<"EOF";
 321         pop     edi
 322         pop     esi
 323         pop     ebx
 324         pop     ebp
 325         ret
 326 EOF
 327         push(@out,$tmp);
 328         }
 329
 330 sub main'file_end
 331         {
 332         }
 333
 334 sub main'wparam
 335         {
 336         my($num)=@_;
 337
 338         return(&main'DWP($stack+$num*4,"esp","",0));
 339         }
 340
 341 sub main'swtmp
 342         {
 343         return(&main'DWP($_[0]*4,"esp","",0));
 344         }
 345
 346 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 347 #sub main'wtmp
 348 #       {
 349 #       my($num)=@_;
 350 #
 351 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 352 #       }
 353
 354 sub main'comment
 355         {
 356         foreach (@_)
 357                 {
 358                 push(@out,"\t; $_\n");
 359                 }
 360         }
 361
 362 sub main'label
 363         {
 364         if (!defined($label{$_[0]}))
 365                 {
 366                 $label{$_[0]}="\@${label}${_[0]}";
 367                 $label++;
 368                 }
 369         return($label{$_[0]});
 370         }
 371
 372 sub main'set_label
 373         {
 374         if (!defined($label{$_[0]}))
 375                 {
 376                 $label{$_[0]}="\@${label}${_[0]}";
 377                 $label++;
 378                 }
 379         push(@out,"$label{$_[0]}:\n");
 380         }
 381
 382 sub main'data_word
 383         {
 384         push(@out,(($main'mwerks)?".long\t":"DD\t").join(',',@_)."\n");
 385         }
 386
 387 sub main'align
 388         {
 389         push(@out,".") if ($main'mwerks);
 390         push(@out,"align\t$_[0]\n");
 391         }
 392
 393 sub out1p
 394         {
 395         my($name,$p1)=@_;
 396         my($l,$t);
 397
 398         push(@out,"\t$name\t ".&conv($p1)."\n");
 399         }
 400
 401 sub main'picmeup
 402         {
 403         local($dst,$sym)=@_;
 404         &main'lea($dst,&main'DWP($sym));
 405         }
 406
 407 sub main'blindpop { &out1("pop",@_); }
 408
 409 sub main'initseg
 410         {
 411         local($f)=@_;
 412         if ($main'win32)
 413                 {
 414                 local($tmp)=<<___;
 415 segment .CRT\$XIU data
 416 extern  $under$f
 417 DD      $under$f
 418 ___
 419                 push(@out,$tmp);
 420                 }
 421         }
 422
 423 1;