perlasm/x86masm.pl: fix last fix.
[openssl.git] / crypto / perlasm / x86gas.pl
1 #!/usr/bin/env perl
2
3 package x86gas;
4
5 *out=\@::out;
6
7 $::lbdecor=$::aout?"L":".L";            # local label decoration
8 $nmdecor=($::aout or $::coff)?"_":"";   # external name decoration
9
10 $initseg="";
11
12 $align=16;
13 $align=log($align)/log(2) if ($::aout);
14 $com_start="#" if ($::aout or $::coff);
15
16 sub opsize()
17 { my $reg=shift;
18     if    ($reg =~ m/^%e/o)             { "l"; }
19     elsif ($reg =~ m/^%[a-d][hl]$/o)    { "b"; }
20     elsif ($reg =~ m/^%[xm]/o)          { undef; }
21     else                                { "w"; }
22 }
23
24 # swap arguments;
25 # expand opcode with size suffix;
26 # prefix numeric constants with $;
27 sub ::generic
28 { my($opcode,@arg)=@_;
29   my($suffix,$dst,$src);
30
31     @arg=reverse(@arg);
32
33     for (@arg)
34     {   s/^(\*?)(e?[a-dsixphl]{2})$/$1%$2/o;    # gp registers
35         s/^([xy]?mm[0-7])$/%$1/o;               # xmm/mmx registers
36         s/^(\-?[0-9]+)$/\$$1/o;                 # constants
37         s/^(\-?0x[0-9a-f]+)$/\$$1/o;            # constants
38     }
39
40     $dst = $arg[$#arg]          if ($#arg>=0);
41     $src = $arg[$#arg-1]        if ($#arg>=1);
42     if    ($dst =~ m/^%/o)      { $suffix=&opsize($dst); }
43     elsif ($src =~ m/^%/o)      { $suffix=&opsize($src); }
44     else                        { $suffix="l";           }
45     undef $suffix if ($dst =~ m/^%[xm]/o || $src =~ m/^%[xm]/o);
46
47     if ($#_==0)                         { &::emit($opcode);             }
48     elsif ($#_==1 && $opcode =~ m/^(call|clflush|j|loop|set)/o)
49                                         { &::emit($opcode,@arg);        }
50     else                                { &::emit($opcode.$suffix,@arg);}
51
52   1;
53 }
54 #
55 # opcodes not covered by ::generic above, mostly inconsistent namings...
56 #
57 sub ::movzx     { &::movzb(@_);                 }
58 sub ::pushfd    { &::pushfl;                    }
59 sub ::popfd     { &::popfl;                     }
60 sub ::cpuid     { &::emit(".byte\t0x0f,0xa2");  }
61 sub ::rdtsc     { &::emit(".byte\t0x0f,0x31");  }
62
63 sub ::call      { &::emit("call",(&::islabel($_[0]) or "$nmdecor$_[0]")); }
64 sub ::call_ptr  { &::generic("call","*$_[0]");  }
65 sub ::jmp_ptr   { &::generic("jmp","*$_[0]");   }
66
67 *::bswap = sub  { &::emit("bswap","%$_[0]");    } if (!$::i386);
68
69 sub ::DWP
70 { my($addr,$reg1,$reg2,$idx)=@_;
71   my $ret="";
72
73     $addr =~ s/^\s+//;
74     # prepend global references with optional underscore
75     $addr =~ s/^([^\+\-0-9][^\+\-]*)/&::islabel($1) or "$nmdecor$1"/ige;
76
77     $reg1 = "%$reg1" if ($reg1);
78     $reg2 = "%$reg2" if ($reg2);
79
80     $ret .= $addr if (($addr ne "") && ($addr ne 0));
81
82     if ($reg2)
83     {   $idx!= 0 or $idx=1;
84         $ret .= "($reg1,$reg2,$idx)";
85     }
86     elsif ($reg1)
87     {   $ret .= "($reg1)";      }
88
89   $ret;
90 }
91 sub ::QWP       { &::DWP(@_);   }
92 sub ::BP        { &::DWP(@_);   }
93 sub ::WP        { &::DWP(@_);   }
94 sub ::BC        { @_;           }
95 sub ::DWC       { @_;           }
96
97 sub ::file
98 {   push(@out,".file\t\"$_[0].s\"\n.text\n");   }
99
100 sub ::function_begin_B
101 { my $func=shift;
102   my $global=($func !~ /^_/);
103   my $begin="${::lbdecor}_${func}_begin";
104
105     &::LABEL($func,$global?"$begin":"$nmdecor$func");
106     $func=$nmdecor.$func;
107
108     push(@out,".globl\t$func\n")        if ($global);
109     if ($::coff)
110     {   push(@out,".def\t$func;\t.scl\t".(3-$global).";\t.type\t32;\t.endef\n"); }
111     elsif (($::aout and !$::pic) or $::macosx)
112     { }
113     else
114     {   push(@out,".type        $func,\@function\n"); }
115     push(@out,".align\t$align\n");
116     push(@out,"$func:\n");
117     push(@out,"$begin:\n")              if ($global);
118     $::stack=4;
119 }
120
121 sub ::function_end_B
122 { my $func=shift;
123     push(@out,".size\t$nmdecor$func,.-".&::LABEL($func)."\n") if ($::elf);
124     $::stack=0;
125     &::wipe_labels();
126 }
127
128 sub ::comment
129         {
130         if (!defined($com_start) or $::elf)
131                 {       # Regarding $::elf above...
132                         # GNU and SVR4 as'es use different comment delimiters,
133                 push(@out,"\n");        # so we just skip ELF comments...
134                 return;
135                 }
136         foreach (@_)
137                 {
138                 if (/^\s*$/)
139                         { push(@out,"\n"); }
140                 else
141                         { push(@out,"\t$com_start $_ $com_end\n"); }
142                 }
143         }
144
145 sub ::external_label
146 {   foreach(@_) { &::LABEL($_,$nmdecor.$_); }   }
147
148 sub ::public_label
149 {   push(@out,".globl\t".&::LABEL($_[0],$nmdecor.$_[0])."\n");   }
150
151 sub ::file_end
152 {   if ($::macosx)
153     {   if (%non_lazy_ptr)
154         {   push(@out,".section __IMPORT,__pointers,non_lazy_symbol_pointers\n");
155             foreach $i (keys %non_lazy_ptr)
156             {   push(@out,"$non_lazy_ptr{$i}:\n.indirect_symbol\t$i\n.long\t0\n");   }
157         }
158     }
159     if (grep {/\b${nmdecor}OPENSSL_ia32cap_P\b/i} @out) {
160         my $tmp=".comm\t${nmdecor}OPENSSL_ia32cap_P,8";
161         if ($::macosx)  { push (@out,"$tmp,2\n"); }
162         elsif ($::elf)  { push (@out,"$tmp,4\n"); }
163         else            { push (@out,"$tmp\n"); }
164     }
165     push(@out,$initseg) if ($initseg);
166 }
167
168 sub ::data_byte {   push(@out,".byte\t".join(',',@_)."\n");   }
169 sub ::data_short{   push(@out,".value\t".join(',',@_)."\n");  }
170 sub ::data_word {   push(@out,".long\t".join(',',@_)."\n");   }
171
172 sub ::align
173 { my $val=$_[0],$p2,$i;
174     if ($::aout)
175     {   for ($p2=0;$val!=0;$val>>=1) { $p2++; }
176         $val=$p2-1;
177         $val.=",0x90";
178     }
179     push(@out,".align\t$val\n");
180 }
181
182 sub ::picmeup
183 { my($dst,$sym,$base,$reflabel)=@_;
184
185     if (($::pic && ($::elf || $::aout)) || $::macosx)
186     {   if (!defined($base))
187         {   &::call(&::label("PIC_me_up"));
188             &::set_label("PIC_me_up");
189             &::blindpop($dst);
190             $base=$dst;
191             $reflabel=&::label("PIC_me_up");
192         }
193         if ($::macosx)
194         {   my $indirect=&::static_label("$nmdecor$sym\$non_lazy_ptr");
195             &::mov($dst,&::DWP("$indirect-$reflabel",$base));
196             $non_lazy_ptr{"$nmdecor$sym"}=$indirect;
197         }
198         else
199         {   &::lea($dst,&::DWP("_GLOBAL_OFFSET_TABLE_+[.-$reflabel]",
200                             $base));
201             &::mov($dst,&::DWP("$sym\@GOT",$dst));
202         }
203     }
204     else
205     {   &::lea($dst,&::DWP($sym));      }
206 }
207
208 sub ::initseg
209 { my $f=$nmdecor.shift;
210
211     if ($::android)
212     {   $initseg.=<<___;
213 .section        .init_array
214 .align  4
215 .long   $f
216 ___
217     }
218     elsif ($::elf)
219     {   $initseg.=<<___;
220 .section        .init
221         call    $f
222 ___
223     }
224     elsif ($::coff)
225     {   $initseg.=<<___;        # applies to both Cygwin and Mingw
226 .section        .ctors
227 .long   $f
228 ___
229     }
230     elsif ($::macosx)
231     {   $initseg.=<<___;
232 .mod_init_func
233 .align 2
234 .long   $f
235 ___
236     }
237     elsif ($::aout)
238     {   my $ctor="${nmdecor}_GLOBAL_\$I\$$f";
239         $initseg.=".text\n";
240         $initseg.=".type        $ctor,\@function\n" if ($::pic);
241         $initseg.=<<___;        # OpenBSD way...
242 .globl  $ctor
243 .align  2
244 $ctor:
245         jmp     $f
246 ___
247     }
248 }
249
250 sub ::dataseg
251 {   push(@out,".data\n");   }
252
253 1;