From: Ivan Maidanski <ivmai@mail.ru>
Date: Thu, 5 Oct 2017 08:40:31 +0000 (+0300)
Subject: Fix 'bad register name %sil' assembler error (GCC-4.4/x86)
X-Git-Tag: v7.6.2~58
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c39944135c75de19a123d812da91f192b51256fa;p=libatomic_ops

Fix 'bad register name %sil' assembler error (GCC-4.4/x86)
(fix commit 7708b76)

* src/atomic_ops/sysdeps/gcc/x86.h [!AO_USE_SYNC_CAS_BUILTIN]
(AO_char_fetch_compare_and_swap_full): Replace "r"(new_val) to
"q"(new_val) in __asm__("cmpxchgb").
---

diff --git a/src/atomic_ops/sysdeps/gcc/x86.h b/src/atomic_ops/sysdeps/gcc/x86.h
index 20bf77f..3ab1f76 100644
--- a/src/atomic_ops/sysdeps/gcc/x86.h
+++ b/src/atomic_ops/sysdeps/gcc/x86.h
@@ -292,7 +292,7 @@ AO_fetch_compare_and_swap_full(volatile AO_t *addr, AO_t old_val,
 
       __asm__ __volatile__ ("lock; cmpxchgb %3, %4"
                             : "=a" (fetched_val), "=m" (*addr)
-                            : "a" (old_val), "r" (new_val), "m" (*addr)
+                            : "a" (old_val), "q" (new_val), "m" (*addr)
                             : "memory");
       return fetched_val;
 #   endif