From 472ded1cf333a35e328a21084f46a28dd5febfef Mon Sep 17 00:00:00 2001
From: William Grant <wgrant@ubuntu.com>
Date: Fri, 15 Nov 2013 14:17:03 +0000
Subject: [PATCH] configure: Prevent the NEON check in configure from passing
 under aarch64.

The test verifies that the NEON C intrinsics work, but the rest of the
codebase uses lots of direct ARMv7 NEON assembly. The same intrinsics
work in A64, but the assembly is slightly different.

Prevent the check from passing so that we don't use this where it won't
work.

https://bugzilla.gnome.org/show_bug.cgi?id=712367
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index e5c223ff18..04953715e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -190,6 +190,7 @@ AC_LINK_IFELSE([
 AC_LANG_PROGRAM([[
   #include <arm_neon.h>
   int32x4_t testfunc(int16_t *a, int16_t *b) {
+      asm volatile ("vmull.s16 q0, d0, d0" : : : "q0");
       return vmull_s16(vld1_s16(a), vld1_s16(b));
   }
 ]])],