move constants for debug functions to end of file
[openssl.git] / crypto / perlasm / x86unix.pl
1 #!/usr/local/bin/perl
2
3 package x86unix;
4
5 $label="L000";
6 $const="";
7 $constl=0;
8
9 $align=($main'aout)?"4":"16";
10 $under=($main'aout)?"_":"";
11 $com_start=($main'sol)?"/":"#";
12
13 sub main'asm_init_output { @out=(); }
14 sub main'asm_get_output { return(@out); }
15 sub main'get_labels { return(@labels); }
16 sub main'external_label { push(@labels,@_); }
17
18 if ($main'cpp)
19         {
20         $align="ALIGN";
21         $under="";
22         $com_start='/*';
23         $com_end='*/';
24         }
25
26 %lb=(   'eax',  '%al',
27         'ebx',  '%bl',
28         'ecx',  '%cl',
29         'edx',  '%dl',
30         'ax',   '%al',
31         'bx',   '%bl',
32         'cx',   '%cl',
33         'dx',   '%dl',
34         );
35
36 %hb=(   'eax',  '%ah',
37         'ebx',  '%bh',
38         'ecx',  '%ch',
39         'edx',  '%dh',
40         'ax',   '%ah',
41         'bx',   '%bh',
42         'cx',   '%ch',
43         'dx',   '%dh',
44         );
45
46 %regs=( 'eax',  '%eax',
47         'ebx',  '%ebx',
48         'ecx',  '%ecx',
49         'edx',  '%edx',
50         'esi',  '%esi',
51         'edi',  '%edi',
52         'ebp',  '%ebp',
53         'esp',  '%esp',
54         );
55
56 %reg_val=(
57         'eax',  0x00,
58         'ebx',  0x03,
59         'ecx',  0x01,
60         'edx',  0x02,
61         'esi',  0x06,
62         'edi',  0x07,
63         'ebp',  0x05,
64         'esp',  0x04,
65         );
66
67 sub main'LB
68         {
69         (defined($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         $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \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
350         if ($main'cpp)
351                 { push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
352         elsif ($main'gaswin)
353                 { $tmp=push(@out,"\t.align 4\n"); }
354         else    { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
355         push(@out,".ident       \"$func\"\n");
356         $stack=0;
357         %label=();
358         }
359
360 sub main'function_end_A
361         {
362         local($func)=@_;
363
364         local($tmp)=<<"EOF";
365         popl    %edi
366         popl    %esi
367         popl    %ebx
368         popl    %ebp
369         ret
370 EOF
371         push(@out,$tmp);
372         }
373
374 sub main'function_end_B
375         {
376         local($func)=@_;
377
378         $func=$under.$func;
379
380         push(@out,".L_${func}_end:\n");
381         if ($main'cpp)
382                 { push(@out,"\tSIZE($func,.L_${func}_end-$func)\n"); }
383         elsif ($main'gaswin)
384                 { push(@out,"\t.align 4\n"); }
385         else    { push(@out,"\t.size\t$func,.L_${func}_end-$func\n"); }
386         push(@out,".ident       \"desasm.pl\"\n");
387         $stack=0;
388         %label=();
389         }
390
391 sub main'wparam
392         {
393         local($num)=@_;
394
395         return(&main'DWP($stack+$num*4,"esp","",0));
396         }
397
398 sub main'stack_push
399         {
400         local($num)=@_;
401         $stack+=$num*4;
402         &main'sub("esp",$num*4);
403         }
404
405 sub main'stack_pop
406         {
407         local($num)=@_;
408         $stack-=$num*4;
409         &main'add("esp",$num*4);
410         }
411
412 sub main'swtmp
413         {
414         return(&main'DWP($_[0]*4,"esp","",0));
415         }
416
417 # Should use swtmp, which is above esp.  Linix can trash the stack above esp
418 #sub main'wtmp
419 #       {
420 #       local($num)=@_;
421 #
422 #       return(&main'DWP(-($num+1)*4,"esp","",0));
423 #       }
424
425 sub main'comment
426         {
427         foreach (@_)
428                 {
429                 if (/^\s*$/)
430                         { push(@out,"\n"); }
431                 else
432                         { push(@out,"\t$com_start $_ $com_end\n"); }
433                 }
434         }
435
436 sub main'label
437         {
438         if (!defined($label{$_[0]}))
439                 {
440                 $label{$_[0]}=".${label}${_[0]}";
441                 $label++;
442                 }
443         return($label{$_[0]});
444         }
445
446 sub main'set_label
447         {
448         if (!defined($label{$_[0]}))
449                 {
450                 $label{$_[0]}=".${label}${_[0]}";
451                 $label++;
452                 }
453         push(@out,".align $align\n") if ($_[1] != 0);
454         push(@out,"$label{$_[0]}:\n");
455         }
456
457 sub main'file_end
458         {
459         if ($const ne "")
460                 {
461                 push(@out,".section .rodata\n");
462                 push(@out,$const);
463                 $const="";
464                 }
465         }
466
467 sub main'data_word
468         {
469         push(@out,"\t.long $_[0]\n");
470         }
471
472 # debug output functions: puts, putx, printf
473
474 sub main'puts
475         {
476         &pushvars();
477         &main'push('$Lstring' . ++$constl);
478         &main'call('puts');
479         $stack-=4;
480         &main'add("esp",4);
481         &popvars();
482
483         $const .= "Lstring$constl:\n\t.string \"@_[0]\"\n";
484         }
485
486 sub main'putx
487         {
488         &pushvars();
489         &main'push($_[0]);
490         &main'push('$Lstring' . ++$constl);
491         &main'call('printf');
492         &main'add("esp",8);
493         $stack-=8;
494         &popvars();
495
496         $const .= "Lstring$constl:\n\t.string \"\%X\"\n";
497         }
498
499 sub main'printf
500         {
501         $ostack = $stack;
502         &pushvars();
503         for ($i = @_ - 1; $i >= 0; $i--)
504                 {
505                 if ($i == 0) # change this to support %s format strings
506                         {
507                         &main'push('$Lstring' . ++$constl);
508                         $const .= "Lstring$constl:\n\t.string \"@_[$i]\"\n";
509                         }
510                 else
511                         {
512                         if ($_[$i] =~ /([0-9]*)\(%esp\)/)
513                                 {
514                                 &main'push(($1 + $stack - $ostack) . '(%esp)');
515                                 }
516                         else
517                                 {
518                                 &main'push($_[$i]);
519                                 }
520                         }
521                 }
522         &main'call('printf');
523         $stack-=4*@_;
524         &main'add("esp",4*@_);
525         &popvars();
526         }
527
528 sub pushvars
529         {
530         &out0("pushf");
531         &main'push("edx");
532         &main'push("ecx");
533         &main'push("eax");
534         }
535
536 sub popvars
537         {
538         &main'pop("eax");
539         &main'pop("ecx");
540         &main'pop("edx");
541         &out0("popf");
542         }