From: Johann <johannkoenig@google.com>
Date: Wed, 13 Nov 2013 23:41:40 +0000 (-0800)
Subject: Generate GAS output for Chromium
X-Git-Tag: v1.3.0~10^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=16344c4a5511669543ab91e5cdb567644210bfb7;p=libvpx

Generate GAS output for Chromium

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
---

diff --git a/build/make/ads2gas_apple.pl b/build/make/ads2gas_apple.pl
index fdafa982b..befb3dbe7 100755
--- a/build/make/ads2gas_apple.pl
+++ b/build/make/ads2gas_apple.pl
@@ -17,6 +17,13 @@
 #
 # Usage: cat inputfile | perl ads2gas_apple.pl > outputfile
 #
+
+my $chromium = 0;
+
+foreach my $arg (@ARGV) {
+    $chromium = 1 if ($arg eq "-chromium");
+}
+
 print "@ This file was created from a .asm file\n";
 print "@  using the ads2gas_apple.pl script.\n\n";
 print "\t.set WIDE_REFERENCE, 0\n";
@@ -47,7 +54,7 @@ while (<STDIN>)
     s/@/,:/g;
 
     # Comment character
-    s/;/@/g;
+    s/;/ @/g;
 
     # Hexadecimal constants prefaced by 0x
     s/#&/#0x/g;
@@ -210,5 +217,19 @@ while (<STDIN>)
 #   s/\$/\\/g;                  # End macro definition
     s/MEND/.endm/;              # No need to tell it where to stop assembling
     next if /^\s*END\s*$/;
+
+    # Clang used by Chromium differs slightly from clang in XCode in what it
+    # will accept in the assembly.
+    if ($chromium) {
+        s/qsubaddx/qsax/i;
+        s/qaddsubx/qasx/i;
+        s/ldrneb/ldrbne/i;
+        s/ldrneh/ldrhne/i;
+        s/(vqshrun\.s16 .*, \#)0$/${1}8/i;
+
+        # http://llvm.org/bugs/show_bug.cgi?id=16022
+        s/\.include/#include/;
+    }
+
     print;
 }