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diff --git a/third_party/aom/build/make/ads2gas.pl b/third_party/aom/build/make/ads2gas.pl
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+++ b/third_party/aom/build/make/ads2gas.pl
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+#!/usr/bin/env perl
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+# ads2gas.pl
+# Author: Eric Fung (efung (at) acm.org)
+#
+# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format
+#
+# Usage: cat inputfile | perl ads2gas.pl > outputfile
+#
+
+use FindBin;
+use lib $FindBin::Bin;
+use thumb;
+
+my $thumb = 0;
+
+foreach my $arg (@ARGV) {
+ $thumb = 1 if ($arg eq "-thumb");
+}
+
+print "@ This file was created from a .asm file\n";
+print "@ using the ads2gas.pl script.\n";
+print "\t.equ DO1STROUNDING, 0\n";
+if ($thumb) {
+ print "\t.syntax unified\n";
+ print "\t.thumb\n";
+}
+
+# Stack of procedure names.
+@proc_stack = ();
+
+while (<STDIN>)
+{
+ undef $comment;
+ undef $line;
+ $comment_char = ";";
+ $comment_sub = "@";
+
+ # Handle comments.
+ if (/$comment_char/)
+ {
+ $comment = "";
+ ($line, $comment) = /(.*?)$comment_char(.*)/;
+ $_ = $line;
+ }
+
+ # Load and store alignment
+ s/@/,:/g;
+
+ # Hexadecimal constants prefaced by 0x
+ s/#&/#0x/g;
+
+ # Convert :OR: to |
+ s/:OR:/ | /g;
+
+ # Convert :AND: to &
+ s/:AND:/ & /g;
+
+ # Convert :NOT: to ~
+ s/:NOT:/ ~ /g;
+
+ # Convert :SHL: to <<
+ s/:SHL:/ << /g;
+
+ # Convert :SHR: to >>
+ s/:SHR:/ >> /g;
+
+ # Convert ELSE to .else
+ s/\bELSE\b/.else/g;
+
+ # Convert ENDIF to .endif
+ s/\bENDIF\b/.endif/g;
+
+ # Convert ELSEIF to .elseif
+ s/\bELSEIF\b/.elseif/g;
+
+ # Convert LTORG to .ltorg
+ s/\bLTORG\b/.ltorg/g;
+
+ # Convert endfunc to nothing.
+ s/\bendfunc\b//ig;
+
+ # Convert FUNCTION to nothing.
+ s/\bFUNCTION\b//g;
+ s/\bfunction\b//g;
+
+ s/\bENTRY\b//g;
+ s/\bMSARMASM\b/0/g;
+ s/^\s+end\s+$//g;
+
+ # Convert IF :DEF:to .if
+ # gcc doesn't have the ability to do a conditional
+ # if defined variable that is set by IF :DEF: on
+ # armasm, so convert it to a normal .if and then
+ # make sure to define a value elesewhere
+ if (s/\bIF :DEF:\b/.if /g)
+ {
+ s/=/==/g;
+ }
+
+ # Convert IF to .if
+ if (s/\bIF\b/.if/g)
+ {
+ s/=+/==/g;
+ }
+
+ # Convert INCLUDE to .INCLUDE "file"
+ s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
+
+ # Code directive (ARM vs Thumb)
+ s/CODE([0-9][0-9])/.code $1/;
+
+ # No AREA required
+ # But ALIGNs in AREA must be obeyed
+ s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
+ # If no ALIGN, strip the AREA and align to 4 bytes
+ s/^\s*AREA.*$/.text\n.p2align 2/;
+
+ # DCD to .word
+ # This one is for incoming symbols
+ s/DCD\s+\|(\w*)\|/.long $1/;
+
+ # DCW to .short
+ s/DCW\s+\|(\w*)\|/.short $1/;
+ s/DCW(.*)/.short $1/;
+
+ # Constants defined in scope
+ s/DCD(.*)/.long $1/;
+ s/DCB(.*)/.byte $1/;
+
+ # RN to .req
+ if (s/RN\s+([Rr]\d+|lr)/.req $1/)
+ {
+ print;
+ print "$comment_sub$comment\n" if defined $comment;
+ next;
+ }
+
+ # Make function visible to linker, and make additional symbol with
+ # prepended underscore
+ s/EXPORT\s+\|([\$\w]*)\|/.global $1 \n\t.type $1, function/;
+ s/IMPORT\s+\|([\$\w]*)\|/.global $1/;
+
+ s/EXPORT\s+([\$\w]*)/.global $1/;
+ s/export\s+([\$\w]*)/.global $1/;
+
+ # No vertical bars required; make additional symbol with prepended
+ # underscore
+ s/^\|(\$?\w+)\|/_$1\n\t$1:/g;
+
+ # Labels need trailing colon
+# s/^(\w+)/$1:/ if !/EQU/;
+ # put the colon at the end of the line in the macro
+ s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
+
+ # ALIGN directive
+ s/\bALIGN\b/.balign/g;
+
+ if ($thumb) {
+ # ARM code - we force everything to thumb with the declaration in the header
+ s/\sARM//g;
+ } else {
+ # ARM code
+ s/\sARM/.arm/g;
+ }
+
+ # push/pop
+ s/(push\s+)(r\d+)/stmdb sp\!, \{$2\}/g;
+ s/(pop\s+)(r\d+)/ldmia sp\!, \{$2\}/g;
+
+ # NEON code
+ s/(vld1.\d+\s+)(q\d+)/$1\{$2\}/g;
+ s/(vtbl.\d+\s+[^,]+),([^,]+)/$1,\{$2\}/g;
+
+ if ($thumb) {
+ thumb::FixThumbInstructions($_, 0);
+ }
+
+ # eabi_attributes numerical equivalents can be found in the
+ # "ARM IHI 0045C" document.
+
+ # REQUIRE8 Stack is required to be 8-byte aligned
+ s/\sREQUIRE8/.eabi_attribute 24, 1 \@Tag_ABI_align_needed/g;
+
+ # PRESERVE8 Stack 8-byte align is preserved
+ s/\sPRESERVE8/.eabi_attribute 25, 1 \@Tag_ABI_align_preserved/g;
+
+ # Use PROC and ENDP to give the symbols a .size directive.
+ # This makes them show up properly in debugging tools like gdb and valgrind.
+ if (/\bPROC\b/)
+ {
+ my $proc;
+ /^_([\.0-9A-Z_a-z]\w+)\b/;
+ $proc = $1;
+ push(@proc_stack, $proc) if ($proc);
+ s/\bPROC\b/@ $&/;
+ }
+ if (/\bENDP\b/)
+ {
+ my $proc;
+ s/\bENDP\b/@ $&/;
+ $proc = pop(@proc_stack);
+ $_ = "\t.size $proc, .-$proc".$_ if ($proc);
+ }
+
+ # EQU directive
+ s/(\S+\s+)EQU(\s+\S+)/.equ $1, $2/;
+
+ # Begin macro definition
+ if (/\bMACRO\b/) {
+ $_ = <STDIN>;
+ s/^/.macro/;
+ s/\$//g; # remove formal param reference
+ s/;/@/g; # change comment characters
+ }
+
+ # For macros, use \ to reference formal params
+ s/\$/\\/g; # End macro definition
+ s/\bMEND\b/.endm/; # No need to tell it where to stop assembling
+ next if /^\s*END\s*$/;
+ print;
+ print "$comment_sub$comment\n" if defined $comment;
+}
+
+# Mark that this object doesn't need an executable stack.
+printf ("\t.section\t.note.GNU-stack,\"\",\%\%progbits\n");