[rtems commit] i386: Fix _CPU_Bitfield_Find_first_bit()

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    3bf9fdbe040136753e6a2c809bd18a44ac5fac03
Changeset: http://git.rtems.org/rtems/commit/?id=3bf9fdbe040136753e6a2c809bd18a44ac5fac03

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Mon Jun 13 09:46:17 2016 +0200

i386: Fix _CPU_Bitfield_Find_first_bit()

Bug introduced by b04b76c6a0c87ffc9670d356e793108411ce355a.

---

 cpukit/score/cpu/i386/rtems/score/cpu.h | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/cpukit/score/cpu/i386/rtems/score/cpu.h b/cpukit/score/cpu/i386/rtems/score/cpu.h
index 3f0e336..6cfeee6 100644
--- a/cpukit/score/cpu/i386/rtems/score/cpu.h
+++ b/cpukit/score/cpu/i386/rtems/score/cpu.h
@@ -552,14 +552,13 @@ extern void _CPU_Fatal_halt(uint32_t source, uint32_t error)
 
 #define _CPU_Bitfield_Find_first_bit( _value, _output ) \
   { \
-    register uint16_t   __value_in_register = (_value); \
-    \
-    _output = 0; \
-    \
+    register uint16_t __value_in_register = ( _value ); \
+    uint16_t          __output = 0; \
     __asm__ volatile ( "bsfw    %0,%1 " \
-                    : "=r" (__value_in_register), "=r" (_output) \
-                    : "0"  (__value_in_register), "1"  (_output) \
+                    : "=r" ( __value_in_register ), "=r" ( __output ) \
+                    : "0"  ( __value_in_register ), "1"  ( __output ) \
     ); \
+    ( _output ) = __output; \
   }
 
 /* end of Bitfield handler macros */