16344c4a55
Upstream changes to account for differences in clang syntax for Chromium iOS builds. Since most of these are incompatible with XCode clang, hide them behind a flag. Change-Id: Idafcbcd4eb01b1ada6277da2d2edfd6c04b579fd
236 lines
5.4 KiB
Perl
Executable File
236 lines
5.4 KiB
Perl
Executable File
#!/usr/bin/env perl
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##
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## Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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##
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## Use of this source code is governed by a BSD-style license
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## that can be found in the LICENSE file in the root of the source
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## tree. An additional intellectual property rights grant can be found
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## in the file PATENTS. All contributing project authors may
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## be found in the AUTHORS file in the root of the source tree.
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##
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# ads2gas_apple.pl
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# Author: Eric Fung (efung (at) acm.org)
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#
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# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format
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#
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# Usage: cat inputfile | perl ads2gas_apple.pl > outputfile
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#
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my $chromium = 0;
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foreach my $arg (@ARGV) {
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$chromium = 1 if ($arg eq "-chromium");
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}
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print "@ This file was created from a .asm file\n";
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print "@ using the ads2gas_apple.pl script.\n\n";
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print "\t.set WIDE_REFERENCE, 0\n";
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print "\t.set ARCHITECTURE, 5\n";
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print "\t.set DO1STROUNDING, 0\n";
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my %register_aliases;
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my %macro_aliases;
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my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9");
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my @incoming_array;
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my @imported_functions;
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# Perl trim function to remove whitespace from the start and end of the string
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sub trim($)
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{
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my $string = shift;
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$string =~ s/^\s+//;
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$string =~ s/\s+$//;
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return $string;
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}
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while (<STDIN>)
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{
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# Load and store alignment
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s/@/,:/g;
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# Comment character
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s/;/ @/g;
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# Hexadecimal constants prefaced by 0x
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s/#&/#0x/g;
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# Convert :OR: to |
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s/:OR:/ | /g;
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# Convert :AND: to &
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s/:AND:/ & /g;
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# Convert :NOT: to ~
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s/:NOT:/ ~ /g;
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# Convert :SHL: to <<
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s/:SHL:/ << /g;
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# Convert :SHR: to >>
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s/:SHR:/ >> /g;
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# Convert ELSE to .else
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s/ELSE/.else/g;
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# Convert ENDIF to .endif
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s/ENDIF/.endif/g;
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# Convert ELSEIF to .elseif
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s/ELSEIF/.elseif/g;
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# Convert LTORG to .ltorg
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s/LTORG/.ltorg/g;
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# Convert IF :DEF:to .if
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# gcc doesn't have the ability to do a conditional
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# if defined variable that is set by IF :DEF: on
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# armasm, so convert it to a normal .if and then
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# make sure to define a value elesewhere
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if (s/\bIF :DEF:\b/.if /g)
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{
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s/=/==/g;
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}
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# Convert IF to .if
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if (s/\bIF\b/.if/g)
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{
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s/=/==/g;
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}
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# Convert INCLUDE to .INCLUDE "file"
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s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
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# Code directive (ARM vs Thumb)
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s/CODE([0-9][0-9])/.code $1/;
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# No AREA required
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# But ALIGNs in AREA must be obeyed
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s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
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# If no ALIGN, strip the AREA and align to 4 bytes
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s/^\s*AREA.*$/.text\n.p2align 2/;
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# DCD to .word
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# This one is for incoming symbols
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s/DCD\s+\|(\w*)\|/.long $1/;
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# DCW to .short
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s/DCW\s+\|(\w*)\|/.short $1/;
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s/DCW(.*)/.short $1/;
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# Constants defined in scope
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s/DCD(.*)/.long $1/;
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s/DCB(.*)/.byte $1/;
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# Build a hash of all the register - alias pairs.
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if (s/(.*)RN(.*)/$1 .req $2/g)
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{
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$register_aliases{trim($1)} = trim($2);
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next;
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}
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while (($key, $value) = each(%register_aliases))
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{
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s/\b$key\b/$value/g;
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}
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# Make function visible to linker, and make additional symbol with
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# prepended underscore
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s/EXPORT\s+\|([\$\w]*)\|/.globl _$1\n\t.globl $1/;
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# Prepend imported functions with _
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if (s/IMPORT\s+\|([\$\w]*)\|/.globl $1/)
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{
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$function = trim($1);
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push(@imported_functions, $function);
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}
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foreach $function (@imported_functions)
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{
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s/$function/_$function/;
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}
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# No vertical bars required; make additional symbol with prepended
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# underscore
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s/^\|(\$?\w+)\|/_$1\n\t$1:/g;
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# Labels need trailing colon
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# s/^(\w+)/$1:/ if !/EQU/;
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# put the colon at the end of the line in the macro
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s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
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# ALIGN directive
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s/ALIGN/.balign/g;
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# Strip ARM
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s/\sARM/@ ARM/g;
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# Strip REQUIRE8
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#s/\sREQUIRE8/@ REQUIRE8/g;
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s/\sREQUIRE8/@ /g;
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# Strip PRESERVE8
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s/\sPRESERVE8/@ PRESERVE8/g;
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# Strip PROC and ENDPROC
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s/\bPROC\b/@/g;
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s/\bENDP\b/@/g;
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# EQU directive
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s/(.*)EQU(.*)/.set $1, $2/;
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# Begin macro definition
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if (/MACRO/)
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{
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# Process next line down, which will be the macro definition
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$_ = <STDIN>;
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$trimmed = trim($_);
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# remove commas that are separating list
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$trimmed =~ s/,//g;
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# string to array
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@incoming_array = split(/\s+/, $trimmed);
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print ".macro @incoming_array[0]\n";
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# remove the first element, as that is the name of the macro
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shift (@incoming_array);
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@macro_aliases{@incoming_array} = @mapping_list;
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next;
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}
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while (($key, $value) = each(%macro_aliases))
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{
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$key =~ s/\$/\\\$/;
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s/$key\b/$value/g;
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}
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# For macros, use \ to reference formal params
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# s/\$/\\/g; # End macro definition
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s/MEND/.endm/; # No need to tell it where to stop assembling
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next if /^\s*END\s*$/;
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# Clang used by Chromium differs slightly from clang in XCode in what it
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# will accept in the assembly.
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if ($chromium) {
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s/qsubaddx/qsax/i;
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s/qaddsubx/qasx/i;
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s/ldrneb/ldrbne/i;
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s/ldrneh/ldrhne/i;
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s/(vqshrun\.s16 .*, \#)0$/${1}8/i;
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# http://llvm.org/bugs/show_bug.cgi?id=16022
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s/\.include/#include/;
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}
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print;
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}
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