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-z][_a-z0-9]*$/i)
 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 sub main'movz   { &out2("movzx",@_); }
 196
 197 # SSE2
 198 sub main'emms   { &out0("emms"); }
 199 sub main'movd   { &out2("movd",@_); }
 200 sub main'movq   { &out2("movq",@_); }
 201 sub main'movdqu { &out2("movdqu",@_); }
 202 sub main'movdqa { &out2("movdqa",@_); }
 203 sub main'movdq2q{ &out2("movdq2q",@_); }
 204 sub main'movq2dq{ &out2("movq2dq",@_); }
 205 sub main'paddq  { &out2("paddq",@_); }
 206 sub main'pmuludq{ &out2("pmuludq",@_); }
 207 sub main'psrlq  { &out2("psrlq",@_); }
 208 sub main'psllq  { &out2("psllq",@_); }
 209 sub main'pxor   { &out2("pxor",@_); }
 210 sub main'por    { &out2("por",@_); }
 211 sub main'pand   { &out2("pand",@_); }
 212
 213 sub out2
 214         {
 215         my($name,$p1,$p2)=@_;
 216         my($l,$t);
 217
 218         push(@out,"\t$name\t");
 219         if (!$main'mwerks and $name eq "lea")
 220                 {
 221                 $p1 =~ s/^[^\[]*\[/\[/;
 222                 $p2 =~ s/^[^\[]*\[/\[/;
 223                 }
 224         $t=&conv($p1).",";
 225         $l=length($t);
 226         push(@out,$t);
 227         $l=4-($l+9)/8;
 228         push(@out,"\t" x $l);
 229         push(@out,&conv($p2));
 230         push(@out,"\n");
 231         }
 232
 233 sub out0
 234         {
 235         my($name)=@_;
 236
 237         push(@out,"\t$name\n");
 238         }
 239
 240 sub out1
 241         {
 242         my($name,$p1)=@_;
 243         my($l,$t);
 244         push(@out,"\t$name\t".&conv($p1)."\n");
 245         }
 246
 247 sub conv
 248         {
 249         my($p)=@_;
 250         $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
 251         return $p;
 252         }
 253
 254 sub using486
 255         {
 256         return if $using486;
 257         $using486++;
 258         grep(s/\.386/\.486/,@out);
 259         }
 260
 261 sub main'file
 262         {
 263         push(@out,".") if ($main'mwerks);
 264         push(@out,"section\t.text\n");
 265         }
 266
 267 sub main'function_begin
 268         {
 269         my($func,$extra)=@_;
 270
 271         push(@labels,$func);
 272         my($tmp)=<<"EOF";
 273 global  $under$func
 274 $under$func:
 275         push    ebp
 276         push    ebx
 277         push    esi
 278         push    edi
 279 EOF
 280         push(@out,$tmp);
 281         $stack=20;
 282         }
 283
 284 sub main'function_begin_B
 285         {
 286         my($func,$extra)=@_;
 287         my($tmp)=<<"EOF";
 288 global  $under$func
 289 $under$func:
 290 EOF
 291         push(@out,$tmp);
 292         $stack=4;
 293         }
 294
 295 sub main'function_end
 296         {
 297         my($func)=@_;
 298
 299         my($tmp)=<<"EOF";
 300         pop     edi
 301         pop     esi
 302         pop     ebx
 303         pop     ebp
 304         ret
 305 EOF
 306         push(@out,$tmp);
 307         $stack=0;
 308         %label=();
 309         }
 310
 311 sub main'function_end_B
 312         {
 313         $stack=0;
 314         %label=();
 315         }
 316
 317 sub main'function_end_A
 318         {
 319         my($func)=@_;
 320
 321         my($tmp)=<<"EOF";
 322         pop     edi
 323         pop     esi
 324         pop     ebx
 325         pop     ebp
 326         ret
 327 EOF
 328         push(@out,$tmp);
 329         }
 330
 331 sub main'file_end
 332         {
 333         }
 334
 335 sub main'wparam
 336         {
 337         my($num)=@_;
 338
 339         return(&main'DWP($stack+$num*4,"esp","",0));
 340         }
 341
 342 sub main'swtmp
 343         {
 344         return(&main'DWP($_[0]*4,"esp","",0));
 345         }
 346
 347 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
 348 #sub main'wtmp
 349 #       {
 350 #       my($num)=@_;
 351 #
 352 #       return(&main'DWP(-(($num+1)*4),"esp","",0));
 353 #       }
 354
 355 sub main'comment
 356         {
 357         foreach (@_)
 358                 {
 359                 push(@out,"\t; $_\n");
 360                 }
 361         }
 362
 363 sub main'public_label
 364         {
 365         $label{$_[0]}="${under}${_[0]}" if (!defined($label{$_[0]}));
 366         push(@out,"global\t$label{$_[0]}\n");
 367         }
 368
 369 sub main'label
 370         {
 371         if (!defined($label{$_[0]}))
 372                 {
 373                 $label{$_[0]}="\@${label}${_[0]}";
 374                 $label++;
 375                 }
 376         return($label{$_[0]});
 377         }
 378
 379 sub main'set_label
 380         {
 381         if (!defined($label{$_[0]}))
 382                 {
 383                 $label{$_[0]}="\@${label}${_[0]}";
 384                 $label++;
 385                 }
 386         if ($_[1]!=0 && $_[1]>1)
 387                 {
 388                 main'align($_[1]);
 389                 }
 390         push(@out,"$label{$_[0]}:\n");
 391         }
 392
 393 sub main'data_word
 394         {
 395         push(@out,(($main'mwerks)?".long\t":"DD\t").join(',',@_)."\n");
 396         }
 397
 398 sub main'align
 399         {
 400         push(@out,".") if ($main'mwerks);
 401         push(@out,"align\t$_[0]\n");
 402         }
 403
 404 sub out1p
 405         {
 406         my($name,$p1)=@_;
 407         my($l,$t);
 408
 409         push(@out,"\t$name\t ".&conv($p1)."\n");
 410         }
 411
 412 sub main'picmeup
 413         {
 414         local($dst,$sym)=@_;
 415         &main'lea($dst,&main'DWP($sym));
 416         }
 417
 418 sub main'blindpop { &out1("pop",@_); }
 419
 420 sub main'initseg
 421         {
 422         local($f)=@_;
 423         if ($main'win32)
 424                 {
 425                 local($tmp)=<<___;
 426 segment .CRT\$XIU data
 427 extern  $under$f
 428 DD      $under$f
 429 ___
 430                 push(@out,$tmp);
 431                 }
 432         }
 433
 434 1;