release/src/router/openssl/crypto/perlasm/x86asm.pl

   1 #!/usr/bin/env perl
   2
   3 # require 'x86asm.pl';
   4 # &asm_init(<flavor>,"des-586.pl"[,$i386only]);
   5 # &function_begin("foo");
   6 # ...
   7 # &function_end("foo");
   8 # &asm_finish
   9
  10 $out=();
  11 $i386=0;
  12
  13 # AUTOLOAD is this context has quite unpleasant side effect, namely
  14 # that typos in function calls effectively go to assembler output,
  15 # but on the pros side we don't have to implement one subroutine per
  16 # each opcode...
  17 sub ::AUTOLOAD
  18 { my $opcode = $AUTOLOAD;
  19
  20     die "more than 4 arguments passed to $opcode" if ($#_>3);
  21
  22     $opcode =~ s/.*:://;
  23     if    ($opcode =~ /^push/) { $stack+=4; }
  24     elsif ($opcode =~ /^pop/)  { $stack-=4; }
  25
  26     &generic($opcode,@_) or die "undefined subroutine \&$AUTOLOAD";
  27 }
  28
  29 sub ::emit
  30 { my $opcode=shift;
  31
  32     if ($#_==-1)    { push(@out,"\t$opcode\n");                         }
  33     else            { push(@out,"\t$opcode\t".join(',',@_)."\n");       }
  34 }
  35
  36 sub ::LB
  37 {   $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'low byte'";
  38   $1."l";
  39 }
  40 sub ::HB
  41 {   $_[0] =~ m/^e?([a-d])x$/o or die "$_[0] does not have a 'high byte'";
  42   $1."h";
  43 }
  44 sub ::stack_push{ my $num=$_[0]*4; $stack+=$num; &sub("esp",$num);      }
  45 sub ::stack_pop { my $num=$_[0]*4; $stack-=$num; &add("esp",$num);      }
  46 sub ::blindpop  { &pop($_[0]); $stack+=4;                               }
  47 sub ::wparam    { &DWP($stack+4*$_[0],"esp");                           }
  48 sub ::swtmp     { &DWP(4*$_[0],"esp");                                  }
  49
  50 sub ::bswap
  51 {   if ($i386)  # emulate bswap for i386
  52     {   &comment("bswap @_");
  53         &xchg(&HB(@_),&LB(@_));
  54         &ror (@_,16);
  55         &xchg(&HB(@_),&LB(@_));
  56     }
  57     else
  58     {   &generic("bswap",@_);   }
  59 }
  60 # These are made-up opcodes introduced over the years essentially
  61 # by ignorance, just alias them to real ones...
  62 sub ::movb      { &mov(@_);     }
  63 sub ::xorb      { &xor(@_);     }
  64 sub ::rotl      { &rol(@_);     }
  65 sub ::rotr      { &ror(@_);     }
  66 sub ::exch      { &xchg(@_);    }
  67 sub ::halt      { &hlt;         }
  68 sub ::movz      { &movzx(@_);   }
  69 sub ::pushf     { &pushfd;      }
  70 sub ::popf      { &popfd;       }
  71
  72 # 3 argument instructions
  73 sub ::movq
  74 { my($p1,$p2,$optimize)=@_;
  75
  76     if ($optimize && $p1=~/^mm[0-7]$/ && $p2=~/^mm[0-7]$/)
  77     # movq between mmx registers can sink Intel CPUs
  78     {   &::pshufw($p1,$p2,0xe4);                }
  79     else
  80     {   &::generic("movq",@_);                  }
  81 }
  82
  83 # SSE>2 instructions
  84 my %regrm = (   "eax"=>0, "ecx"=>1, "edx"=>2, "ebx"=>3,
  85                 "esp"=>4, "ebp"=>5, "esi"=>6, "edi"=>7  );
  86 sub ::pextrd
  87 { my($dst,$src,$imm)=@_;
  88     if ("$dst:$src" =~ /(e[a-dsd][ixp]):xmm([0-7])/)
  89     {   &::data_byte(0x66,0x0f,0x3a,0x16,0xc0|($2<<3)|$regrm{$1},$imm); }
  90     else
  91     {   &::generic("pextrd",@_);                }
  92 }
  93
  94 sub ::pinsrd
  95 { my($dst,$src,$imm)=@_;
  96     if ("$dst:$src" =~ /xmm([0-7]):(e[a-dsd][ixp])/)
  97     {   &::data_byte(0x66,0x0f,0x3a,0x22,0xc0|($1<<3)|$regrm{$2},$imm); }
  98     else
  99     {   &::generic("pinsrd",@_);                }
 100 }
 101
 102 sub ::pshufb
 103 { my($dst,$src)=@_;
 104     if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
 105     {   &data_byte(0x66,0x0f,0x38,0x00,0xc0|($1<<3)|$2);        }
 106     else
 107     {   &::generic("pshufb",@_);                }
 108 }
 109
 110 sub ::palignr
 111 { my($dst,$src,$imm)=@_;
 112     if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
 113     {   &::data_byte(0x66,0x0f,0x3a,0x0f,0xc0|($1<<3)|$2,$imm); }
 114     else
 115     {   &::generic("palignr",@_);               }
 116 }
 117
 118 sub ::pclmulqdq
 119 { my($dst,$src,$imm)=@_;
 120     if ("$dst:$src" =~ /xmm([0-7]):xmm([0-7])/)
 121     {   &::data_byte(0x66,0x0f,0x3a,0x44,0xc0|($1<<3)|$2,$imm); }
 122     else
 123     {   &::generic("pclmulqdq",@_);             }
 124 }
 125
 126 sub ::rdrand
 127 { my ($dst)=@_;
 128     if ($dst =~ /(e[a-dsd][ixp])/)
 129     {   &::data_byte(0x0f,0xc7,0xf0|$regrm{$dst});      }
 130     else
 131     {   &::generic("rdrand",@_);        }
 132 }
 133
 134 sub ::rdseed
 135 { my ($dst)=@_;
 136     if ($dst =~ /(e[a-dsd][ixp])/)
 137     {   &::data_byte(0x0f,0xc7,0xf8|$regrm{$dst});      }
 138     else
 139     {   &::generic("rdrand",@_);        }
 140 }
 141
 142 sub rxb {
 143  local *opcode=shift;
 144  my ($dst,$src1,$src2,$rxb)=@_;
 145
 146    $rxb|=0x7<<5;
 147    $rxb&=~(0x04<<5) if($dst>=8);
 148    $rxb&=~(0x01<<5) if($src1>=8);
 149    $rxb&=~(0x02<<5) if($src2>=8);
 150    push @opcode,$rxb;
 151 }
 152
 153 sub ::vprotd
 154 { my $args=join(',',@_);
 155     if ($args =~ /xmm([0-7]),xmm([0-7]),([x0-9a-f]+)/)
 156     { my @opcode=(0x8f);
 157         rxb(\@opcode,$1,$2,-1,0x08);
 158         push @opcode,0x78,0xc2;
 159         push @opcode,0xc0|($2&7)|(($1&7)<<3);           # ModR/M
 160         my $c=$3;
 161         push @opcode,$c=~/^0/?oct($c):$c;
 162         &::data_byte(@opcode);
 163     }
 164     else
 165     {   &::generic("vprotd",@_);        }
 166 }
 167
 168 # label management
 169 $lbdecor="L";           # local label decoration, set by package
 170 $label="000";
 171
 172 sub ::islabel           # see is argument is a known label
 173 { my $i;
 174     foreach $i (values %label) { return $i if ($i eq $_[0]); }
 175   $label{$_[0]};        # can be undef
 176 }
 177
 178 sub ::label             # instantiate a function-scope label
 179 {   if (!defined($label{$_[0]}))
 180     {   $label{$_[0]}="${lbdecor}${label}${_[0]}"; $label++;   }
 181   $label{$_[0]};
 182 }
 183
 184 sub ::LABEL             # instantiate a file-scope label
 185 {   $label{$_[0]}=$_[1] if (!defined($label{$_[0]}));
 186   $label{$_[0]};
 187 }
 188
 189 sub ::static_label      { &::LABEL($_[0],$lbdecor.$_[0]); }
 190
 191 sub ::set_label_B       { push(@out,"@_:\n"); }
 192 sub ::set_label
 193 { my $label=&::label($_[0]);
 194     &::align($_[1]) if ($_[1]>1);
 195     &::set_label_B($label);
 196   $label;
 197 }
 198
 199 sub ::wipe_labels       # wipes function-scope labels
 200 {   foreach $i (keys %label)
 201     {   delete $label{$i} if ($label{$i} =~ /^\Q${lbdecor}\E[0-9]{3}/); }
 202 }
 203
 204 # subroutine management
 205 sub ::function_begin
 206 {   &function_begin_B(@_);
 207     $stack=4;
 208     &push("ebp");
 209     &push("ebx");
 210     &push("esi");
 211     &push("edi");
 212 }
 213
 214 sub ::function_end
 215 {   &pop("edi");
 216     &pop("esi");
 217     &pop("ebx");
 218     &pop("ebp");
 219     &ret();
 220     &function_end_B(@_);
 221     $stack=0;
 222     &wipe_labels();
 223 }
 224
 225 sub ::function_end_A
 226 {   &pop("edi");
 227     &pop("esi");
 228     &pop("ebx");
 229     &pop("ebp");
 230     &ret();
 231     $stack+=16; # readjust esp as if we didn't pop anything
 232 }
 233
 234 sub ::asciz
 235 { my @str=unpack("C*",shift);
 236     push @str,0;
 237     while ($#str>15) {
 238         &data_byte(@str[0..15]);
 239         foreach (0..15) { shift @str; }
 240     }
 241     &data_byte(@str) if (@str);
 242 }
 243
 244 sub ::asm_finish
 245 {   &file_end();
 246     print @out;
 247 }
 248
 249 sub ::asm_init
 250 { my ($type,$fn,$cpu)=@_;
 251
 252     $filename=$fn;
 253     $i386=$cpu;
 254
 255     $elf=$cpp=$coff=$aout=$macosx=$win32=$netware=$mwerks=$android=0;
 256     if    (($type eq "elf"))
 257     {   $elf=1;                 require "x86gas.pl";    }
 258     elsif (($type eq "elf-1"))
 259     {   $elf=-1;                require "x86gas.pl";    }
 260     elsif (($type eq "a\.out"))
 261     {   $aout=1;                require "x86gas.pl";    }
 262     elsif (($type eq "coff" or $type eq "gaswin"))
 263     {   $coff=1;                require "x86gas.pl";    }
 264     elsif (($type eq "win32n"))
 265     {   $win32=1;               require "x86nasm.pl";   }
 266     elsif (($type eq "nw-nasm"))
 267     {   $netware=1;             require "x86nasm.pl";   }
 268     #elsif (($type eq "nw-mwasm"))
 269     #{  $netware=1; $mwerks=1;  require "x86nasm.pl";   }
 270     elsif (($type eq "win32"))
 271     {   $win32=1;               require "x86masm.pl";   }
 272     elsif (($type eq "macosx"))
 273     {   $aout=1; $macosx=1;     require "x86gas.pl";    }
 274     elsif (($type eq "android"))
 275     {   $elf=1; $android=1;     require "x86gas.pl";    }
 276     else
 277     {   print STDERR <<"EOF";
 278 Pick one target type from
 279         elf     - Linux, FreeBSD, Solaris x86, etc.
 280         a.out   - DJGPP, elder OpenBSD, etc.
 281         coff    - GAS/COFF such as Win32 targets
 282         win32n  - Windows 95/Windows NT NASM format
 283         nw-nasm - NetWare NASM format
 284         macosx  - Mac OS X
 285 EOF
 286         exit(1);
 287     }
 288
 289     $pic=0;
 290     for (@ARGV) { $pic=1 if (/\-[fK]PIC/i); }
 291
 292     $filename =~ s/\.pl$//;
 293     &file($filename);
 294 }
 295
 296 sub ::hidden {}
 297
 298 1;