3 ## Copyright (c) 2010 The WebM project authors. All Rights Reserved.
5 ## Use of this source code is governed by a BSD-style license
6 ## that can be found in the LICENSE file in the root of the source
7 ## tree. An additional intellectual property rights grant can be found
8 ## in the file PATENTS. All contributing project authors may
9 ## be found in the AUTHORS file in the root of the source tree.
14 # Author: Eric Fung (efung (at) acm.org)
16 # Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format
18 # Usage: cat inputfile | perl ads2gas_apple.pl > outputfile
23 foreach my $arg (@ARGV) {
24 $chromium = 1 if ($arg eq "-chromium");
27 print "@ This file was created from a .asm file\n";
28 print "@ using the ads2gas_apple.pl script.\n\n";
29 print "\t.set WIDE_REFERENCE, 0\n";
30 print "\t.set ARCHITECTURE, 5\n";
31 print "\t.set DO1STROUNDING, 0\n";
36 my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9");
40 my @imported_functions;
42 # Perl trim function to remove whitespace from the start and end of the string
53 # Load and store alignment
59 # Hexadecimal constants prefaced by 0x
77 # Convert ELSE to .else
80 # Convert ENDIF to .endif
83 # Convert ELSEIF to .elseif
84 s/\bELSEIF\b/.elseif/g;
86 # Convert LTORG to .ltorg
89 # Convert IF :DEF:to .if
90 # gcc doesn't have the ability to do a conditional
91 # if defined variable that is set by IF :DEF: on
92 # armasm, so convert it to a normal .if and then
93 # make sure to define a value elesewhere
94 if (s/\bIF :DEF:\b/.if /g)
105 # Convert INCLUDE to .INCLUDE "file"
106 s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
108 # Code directive (ARM vs Thumb)
109 s/CODE([0-9][0-9])/.code $1/;
112 # But ALIGNs in AREA must be obeyed
113 s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
114 # If no ALIGN, strip the AREA and align to 4 bytes
115 s/^\s*AREA.*$/.text\n.p2align 2/;
118 # This one is for incoming symbols
119 s/DCD\s+\|(\w*)\|/.long $1/;
122 s/DCW\s+\|(\w*)\|/.short $1/;
123 s/DCW(.*)/.short $1/;
125 # Constants defined in scope
129 # Build a hash of all the register - alias pairs.
130 if (s/(.*)RN(.*)/$1 .req $2/g)
132 $register_aliases{trim($1)} = trim($2);
136 while (($key, $value) = each(%register_aliases))
141 # Make function visible to linker, and make additional symbol with
142 # prepended underscore
143 s/EXPORT\s+\|([\$\w]*)\|/.globl _$1\n\t.globl $1/;
145 # Prepend imported functions with _
146 if (s/IMPORT\s+\|([\$\w]*)\|/.globl $1/)
148 $function = trim($1);
149 push(@imported_functions, $function);
152 foreach $function (@imported_functions)
154 s/$function/_$function/;
157 # No vertical bars required; make additional symbol with prepended
159 s/^\|(\$?\w+)\|/_$1\n\t$1:/g;
161 # Labels need trailing colon
162 # s/^(\w+)/$1:/ if !/EQU/;
163 # put the colon at the end of the line in the macro
164 s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
167 s/\bALIGN\b/.balign/g;
173 #s/\sREQUIRE8/@ REQUIRE8/g;
177 s/\sPRESERVE8/@ PRESERVE8/g;
179 # Strip PROC and ENDPROC
184 s/(.*)EQU(.*)/.set $1, $2/;
186 # Begin macro definition
189 # Process next line down, which will be the macro definition
194 # remove commas that are separating list
198 @incoming_array = split(/\s+/, $trimmed);
200 print ".macro @incoming_array[0]\n";
202 # remove the first element, as that is the name of the macro
203 shift (@incoming_array);
205 @macro_aliases{@incoming_array} = @mapping_list;
210 while (($key, $value) = each(%macro_aliases))
216 # For macros, use \ to reference formal params
217 # s/\$/\\/g; # End macro definition
218 s/\bMEND\b/.endm/; # No need to tell it where to stop assembling
219 next if /^\s*END\s*$/;
221 # Clang used by Chromium differs slightly from clang in XCode in what it
222 # will accept in the assembly.
228 s/(vqshrun\.s16 .*, \#)0$/${1}8/i;
230 # http://llvm.org/bugs/show_bug.cgi?id=16022
231 s/\.include/#include/;