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1); # Some out-of-date 32-bit GNU assembler just can't handle cmplw...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