From 82641e16aa83c693974297951e23ba08a3e89652 Mon Sep 17 00:00:00 2001
From: Wilco Dijkstra <wdijkstr@arm.com>
Date: Mon, 13 Jul 2015 12:48:33 +0100
Subject: [PATCH] Add AArch64 versions of math_opt_barrier and math_force_eval
 that avoid going via memory.

---
 ChangeLog                          | 6 ++++++
 sysdeps/aarch64/fpu/math_private.h | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index df8c19eeab..dfef5e0f60 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2015-04-01  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* sysdeps/aarch64/fpu/math_private.h
+	(define math_opt_barrier): Add AArch64 version.
+	(math_force_eval): Likewise.
+
 2015-07-13  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	* sysdeps/aarch64/strlen.S (strlen): Optimize strlen.
diff --git a/sysdeps/aarch64/fpu/math_private.h b/sysdeps/aarch64/fpu/math_private.h
index b3c2509961..1f02ddb05a 100644
--- a/sysdeps/aarch64/fpu/math_private.h
+++ b/sysdeps/aarch64/fpu/math_private.h
@@ -22,6 +22,11 @@
 #include <fenv.h>
 #include <fpu_control.h>
 
+#define math_opt_barrier(x) \
+({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; })
+#define math_force_eval(x) \
+({ __typeof (x) __x = (x); __asm __volatile__ ("" : : "w" (__x)); })
+
 extern __always_inline double
 __ieee754_sqrt (double d)
 {
-- 
2.43.5