From 137dc553d86b1ccf94388e48efaf17609dfcd28f Mon Sep 17 00:00:00 2001
From: Torbjorn Granlund <tege@gmplib.org>
Date: Wed, 17 Apr 2013 17:04:54 +0200
Subject: (arm64 count_trailing_zeros): New.

---
 longlong.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'longlong.h')

diff --git a/longlong.h b/longlong.h
index a7a853253..d969c7470 100644
--- a/longlong.h
+++ b/longlong.h
@@ -548,6 +548,8 @@ extern UWtype __MPN(udiv_qrnnd) (UWtype *, UWtype, UWtype, UWtype);
   } while (0)
 #define count_leading_zeros(count, x) \
   __asm__ ("clz\t%0, %1" : "=r" (count) : "r" (x))
+#define count_trailing_zeros(count, x) \
+  __asm__ ("rbit\t%0, %1\n\tclz\t%0, %0" : "=r" (count) : "r" (x))
 #define COUNT_LEADING_ZEROS_0 64
 #endif /* __aarch64__ */
 
-- 
cgit v1.2.1