From: Ivan Maidanski <ivmai@mail.ru>
Date: Sat, 17 Aug 2013 09:58:59 +0000 (+0400)
Subject: Fix ARM double-CAS operands width (GCC/Clang)
X-Git-Tag: libatomic_ops-7_2e~5
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b60ce287b2fdd12a522932f5707b320cba181904;p=libatomic_ops

Fix ARM double-CAS operands width (GCC/Clang)
(Apply commit a81940c from 'master' branch.)

* src/atomic_ops/sysdeps/gcc/arm.h (AO_double_compare_and_swap): Swap
assembly code operands ("new_val" and "addr") to prevent
Clang3.3 warning about operand truncation.

Conflicts:

    src/atomic_ops/sysdeps/gcc/arm.h
---

diff --git a/src/atomic_ops/sysdeps/gcc/arm.h b/src/atomic_ops/sysdeps/gcc/arm.h
index 1c5af93..0aa5e7c 100644
--- a/src/atomic_ops/sysdeps/gcc/arm.h
+++ b/src/atomic_ops/sysdeps/gcc/arm.h
@@ -295,9 +295,9 @@ AO_compare_and_swap(volatile AO_t *addr, AO_t old_val, AO_t new_val)
       if (tmp != old_val)
         break;
       __asm__ __volatile__(
-        "       strexd  %0, %2, %H2, [%3]\n" /* store new one if matched */
+        "       strexd  %0, %3, %H3, [%2]\n" /* store new one if matched */
         : "=&r"(result), "+m"(*addr)
-        : "r"(new_val), "r"(addr)
+        : "r" (addr), "r" (new_val)
         : "cc");
     } while (result);
     return !result;   /* if succeded, return 1 else 0 */