Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | #!/usr/bin/env perl |
| 2 | |
| 3 | # PowerPC assembler distiller by <appro>. |
| 4 | |
| 5 | my $flavour = shift; |
| 6 | my $output = shift; |
| 7 | open STDOUT,">$output" || die "can't open $output: $!"; |
| 8 | |
| 9 | my %GLOBALS; |
| 10 | my $dotinlocallabels=($flavour=~/linux/)?1:0; |
| 11 | |
| 12 | ################################################################ |
| 13 | # directives which need special treatment on different platforms |
| 14 | ################################################################ |
| 15 | my $globl = sub { |
| 16 | my $junk = shift; |
| 17 | my $name = shift; |
| 18 | my $global = \$GLOBALS{$name}; |
| 19 | my $ret; |
| 20 | |
| 21 | $name =~ s|^[\.\_]||; |
| 22 | |
| 23 | SWITCH: for ($flavour) { |
| 24 | /aix/ && do { $name = ".$name"; |
| 25 | last; |
| 26 | }; |
| 27 | /osx/ && do { $name = "_$name"; |
| 28 | last; |
| 29 | }; |
| 30 | /linux.*32/ && do { $ret .= ".globl $name\n"; |
| 31 | $ret .= ".type $name,\@function"; |
| 32 | last; |
| 33 | }; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 34 | /linux.*64/ && do { $ret .= ".globl .$name\n"; |
| 35 | $ret .= ".type .$name,\@function\n"; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 36 | $ret .= ".section \".opd\",\"aw\"\n"; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 37 | $ret .= ".globl $name\n"; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 38 | $ret .= ".align 3\n"; |
| 39 | $ret .= "$name:\n"; |
| 40 | $ret .= ".quad .$name,.TOC.\@tocbase,0\n"; |
| 41 | $ret .= ".size $name,24\n"; |
| 42 | $ret .= ".previous\n"; |
| 43 | |
| 44 | $name = ".$name"; |
| 45 | last; |
| 46 | }; |
| 47 | } |
| 48 | |
| 49 | $ret = ".globl $name" if (!$ret); |
| 50 | $$global = $name; |
| 51 | $ret; |
| 52 | }; |
| 53 | my $text = sub { |
| 54 | ($flavour =~ /aix/) ? ".csect" : ".text"; |
| 55 | }; |
| 56 | my $machine = sub { |
| 57 | my $junk = shift; |
| 58 | my $arch = shift; |
| 59 | if ($flavour =~ /osx/) |
| 60 | { $arch =~ s/\"//g; |
| 61 | $arch = ($flavour=~/64/) ? "ppc970-64" : "ppc970" if ($arch eq "any"); |
| 62 | } |
| 63 | ".machine $arch"; |
| 64 | }; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 65 | my $asciz = sub { |
| 66 | shift; |
| 67 | my $line = join(",",@_); |
| 68 | if ($line =~ /^"(.*)"$/) |
| 69 | { ".byte " . join(",",unpack("C*",$1),0) . "\n.align 2"; } |
| 70 | else |
| 71 | { ""; } |
| 72 | }; |
| 73 | |
| 74 | ################################################################ |
| 75 | # simplified mnemonics not handled by at least one assembler |
| 76 | ################################################################ |
| 77 | my $cmplw = sub { |
| 78 | my $f = shift; |
| 79 | my $cr = 0; $cr = shift if ($#_>1); |
| 80 | # Some out-of-date 32-bit GNU assembler just can't handle cmplw... |
| 81 | ($flavour =~ /linux.*32/) ? |
| 82 | " .long ".sprintf "0x%x",31<<26|$cr<<23|$_[0]<<16|$_[1]<<11|64 : |
| 83 | " cmplw ".join(',',$cr,@_); |
| 84 | }; |
| 85 | my $bdnz = sub { |
| 86 | my $f = shift; |
| 87 | my $bo = $f=~/[\+\-]/ ? 16+9 : 16; # optional "to be taken" hint |
| 88 | " bc $bo,0,".shift; |
| 89 | } if ($flavour!~/linux/); |
| 90 | my $bltlr = sub { |
| 91 | my $f = shift; |
| 92 | my $bo = $f=~/\-/ ? 12+2 : 12; # optional "not to be taken" hint |
| 93 | ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
| 94 | " .long ".sprintf "0x%x",19<<26|$bo<<21|16<<1 : |
| 95 | " bclr $bo,0"; |
| 96 | }; |
| 97 | my $bnelr = sub { |
| 98 | my $f = shift; |
| 99 | my $bo = $f=~/\-/ ? 4+2 : 4; # optional "not to be taken" hint |
| 100 | ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
| 101 | " .long ".sprintf "0x%x",19<<26|$bo<<21|2<<16|16<<1 : |
| 102 | " bclr $bo,2"; |
| 103 | }; |
| 104 | my $beqlr = sub { |
| 105 | my $f = shift; |
| 106 | my $bo = $f=~/-/ ? 12+2 : 12; # optional "not to be taken" hint |
| 107 | ($flavour =~ /linux/) ? # GNU as doesn't allow most recent hints |
| 108 | " .long ".sprintf "0x%X",19<<26|$bo<<21|2<<16|16<<1 : |
| 109 | " bclr $bo,2"; |
| 110 | }; |
| 111 | # GNU assembler can't handle extrdi rA,rS,16,48, or when sum of last two |
| 112 | # arguments is 64, with "operand out of range" error. |
| 113 | my $extrdi = sub { |
| 114 | my ($f,$ra,$rs,$n,$b) = @_; |
| 115 | $b = ($b+$n)&63; $n = 64-$n; |
| 116 | " rldicl $ra,$rs,$b,$n"; |
| 117 | }; |
| 118 | |
| 119 | while($line=<>) { |
| 120 | |
| 121 | $line =~ s|[#!;].*$||; # get rid of asm-style comments... |
| 122 | $line =~ s|/\*.*\*/||; # ... and C-style comments... |
| 123 | $line =~ s|^\s+||; # ... and skip white spaces in beginning... |
| 124 | $line =~ s|\s+$||; # ... and at the end |
| 125 | |
| 126 | { |
| 127 | $line =~ s|\b\.L(\w+)|L$1|g; # common denominator for Locallabel |
| 128 | $line =~ s|\bL(\w+)|\.L$1|g if ($dotinlocallabels); |
| 129 | } |
| 130 | |
| 131 | { |
| 132 | $line =~ s|(^[\.\w]+)\:\s*||; |
| 133 | my $label = $1; |
| 134 | printf "%s:",($GLOBALS{$label} or $label) if ($label); |
| 135 | } |
| 136 | |
| 137 | { |
| 138 | $line =~ s|^\s*(\.?)(\w+)([\.\+\-]?)\s*||; |
| 139 | my $c = $1; $c = "\t" if ($c eq ""); |
| 140 | my $mnemonic = $2; |
| 141 | my $f = $3; |
| 142 | my $opcode = eval("\$$mnemonic"); |
| 143 | $line =~ s|\bc?[rf]([0-9]+)\b|$1|g if ($c ne "." and $flavour !~ /osx/); |
| 144 | if (ref($opcode) eq 'CODE') { $line = &$opcode($f,split(',',$line)); } |
| 145 | elsif ($mnemonic) { $line = $c.$mnemonic.$f."\t".$line; } |
| 146 | } |
| 147 | |
| 148 | print $line if ($line); |
| 149 | print "\n"; |
| 150 | } |
| 151 | |
| 152 | close STDOUT; |