From 8d8f68709d8ec730f14de15fd1f8192f1a5f7163 Mon Sep 17 00:00:00 2001
From: Ragesh Radhakrishnan <ragesh.r@linaro.org>
Date: Mon, 14 Oct 2013 19:45:58 +0530
Subject: Add aarch64 neon support check

Add small neon code snipet to check the compiler neon support in
acinclude.m4
---
 acinclude.m4 | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/acinclude.m4 b/acinclude.m4
index 70e2555..8ebfbc5 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -180,3 +180,36 @@ AC_DEFUN([AC_CHECK_COMPATIBLE_ARM_ASSEMBLER_IFELSE],[
     $2
   fi
 ])
+
+AC_DEFUN([AC_CHECK_COMPATIBLE_ARM64_ASSEMBLER_IFELSE],[
+  ac_good_gnu_arm_assembler=no
+  ac_save_CC="$CC"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="$CCASFLAGS -x assembler-with-cpp"
+  CC="$CCAS"
+  AC_COMPILE_IFELSE([[
+    .text
+    movi v0.16b, #100]], ac_good_gnu_arm_assembler=yes)
+
+  ac_use_gas_preprocessor=no
+  if test "x$ac_good_gnu_arm_assembler" = "xno" ; then
+    CC="gas-preprocessor.pl $CCAS"
+    AC_COMPILE_IFELSE([[
+      .text
+      movi v0.16b, #100]], ac_use_gas_preprocessor=yes)
+  fi
+  CFLAGS="$ac_save_CFLAGS"
+  CC="$ac_save_CC"
+
+  if test "x$ac_use_gas_preprocessor" = "xyes" ; then
+    CCAS="gas-preprocessor.pl $CCAS"
+    AC_SUBST([CCAS])
+    ac_good_gnu_arm_assembler=yes
+  fi
+
+  if test "x$ac_good_gnu_arm_assembler" = "xyes" ; then
+    $1
+  else
+    $2
+  fi
+])
-- 
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