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159 lines
4.2 KiB
159 lines
4.2 KiB
#!/usr/bin/env perl |
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# PowerPC assembler distiller by <appro>. |
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my $flavour = shift; |
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my $output = shift; |
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open STDOUT,">$output" || die "can't open $output: $!"; |
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my %GLOBALS; |
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my $dotinlocallabels=($flavour=~/linux/)?1:0; |
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################################################################ |
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# directives which need special treatment on different platforms |
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################################################################ |
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my $globl = sub { |
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my $junk = shift; |
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my $name = shift; |
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my $global = \$GLOBALS{$name}; |
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my $ret; |
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$name =~ s|^[\.\_]||; |
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SWITCH: for ($flavour) { |
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/aix/ && do { $name = ".$name"; |
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last; |
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}; |
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/osx/ && do { $name = "_$name"; |
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last; |
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}; |
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/linux.*32/ && do { $ret .= ".globl $name\n"; |
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$ret .= ".type $name,\@function"; |
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last; |
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}; |
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/linux.*64/ && do { $ret .= ".globl $name\n"; |
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$ret .= ".type $name,\@function\n"; |
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$ret .= ".section \".opd\",\"aw\"\n"; |
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$ret .= ".align 3\n"; |
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$ret .= "$name:\n"; |
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$ret .= ".quad .$name,.TOC.\@tocbase,0\n"; |
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$ret .= ".size $name,24\n"; |
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$ret .= ".previous\n"; |
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$name = ".$name"; |
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last; |
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}; |
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} |
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$ret = ".globl $name" if (!$ret); |
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$$global = $name; |
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$ret; |
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}; |
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my $text = sub { |
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($flavour =~ /aix/) ? ".csect" : ".text"; |
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}; |
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my $machine = sub { |
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my $junk = shift; |
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my $arch = shift; |
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if ($flavour =~ /osx/) |
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{ $arch =~ s/\"//g; |
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$arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any"); |
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} |
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".machine $arch"; |
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}; |
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my $size = sub { |
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if ($flavour =~ /linux.*32/) |
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{ shift; |
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".size " . join(",",@_); |
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} |
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else |
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{ ""; } |
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}; |
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my $asciz = sub { |
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shift; |
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my $line = join(",",@_); |
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if ($line =~ /^"(.*)"$/) |
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{ ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; } |
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else |
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{ ""; } |
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}; |
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################################################################ |
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# simplified mnemonics not handled by at least one assembler |
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################################################################ |
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my $cmplw = sub { |
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my $f = shift; |
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my $cr = 0; $cr = shift if ($#_>1); |
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# Some out-of-date 32-bit GNU assembler just can't handle cmplw... |
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($flavour =~ /linux.*32/) ? |
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" .long ".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 : |
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" cmplw ".join(',',$cr,@_); |
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}; |
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my $bdnz = sub { |
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my $f = shift; |
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my $bo = $f=~/[\+\-]/ ? 16+9 : 16; # optional "to be taken" hint |
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" bc $bo,0,".shift; |
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} if ($flavour!~/linux/); |
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my $bltlr = sub { |
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my $f = shift; |
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my $bo = $f=~/\-/ ? 12+2 : 12; # optional "not to be taken" hint |
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($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
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" .long ".sprintf "0x%x",19<<26|$bo<<21|16<<1 : |
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" bclr $bo,0"; |
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}; |
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my $bnelr = sub { |
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my $f = shift; |
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my $bo = $f=~/\-/ ? 4+2 : 4; # optional "not to be taken" hint |
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($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
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" .long ".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 : |
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" bclr $bo,2"; |
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}; |
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my $beqlr = sub { |
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my $f = shift; |
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my $bo = $f=~/-/ ? 12+2 : 12; # optional "not to be taken" hint |
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($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
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" .long ".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 : |
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" bclr $bo,2"; |
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}; |
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# GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two |
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# arguments is 64, with "operand out of range" error. |
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my $extrdi = sub { |
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my ($f,$ra,$rs,$n,$b) = @_; |
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$b = ($b+$n)&63; $n = 64-$n; |
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" rldicl $ra,$rs,$b,$n"; |
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}; |
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while($line=<>) { |
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$line =~ s|[#!;].*$||; # get rid of asm-style comments... |
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$line =~ s|/\*.*\*/||; # ... and C-style comments... |
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$line =~ s|^\s+||; # ... and skip white spaces in beginning... |
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$line =~ s|\s+$||; # ... and at the end |
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{ |
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$line =~ s|\b\.L(\w+)|L$1|g; # common denominator for Locallabel |
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$line =~ s|\bL(\w+)|\.L$1|g if ($dotinlocallabels); |
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} |
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{ |
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$line =~ s|(^[\.\w]+)\:\s*||; |
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my $label = $1; |
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printf "%s:",($GLOBALS{$label} or $label) if ($label); |
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} |
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{ |
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$line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||; |
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my $c = $1; $c = "\t" if ($c eq ""); |
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my $mnemonic = $2; |
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my $f = $3; |
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my $opcode = eval("\$$mnemonic"); |
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$line =~ s|\bc?[rf]([0-9]+)\b|$1|g if ($c ne "." and $flavour !~ /osx/); |
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if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); } |
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elsif ($mnemonic) { $line = $c.$mnemonic.$f."\t".$line; } |
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} |
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print $line if ($line); |
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print "\n"; |
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} |
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close STDOUT;
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