From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: [PATCH v5 4/7] arm: compile memshr Date: Thu, 23 Feb 2012 14:51:48 +0000 Message-ID: <1330008712-17715-4-git-send-email-stefano.stabellini@eu.citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xensource.com Cc: david.vrabel@citrix.com, Ian.Campbell@citrix.com, Stefano Stabellini , Tim.Deegan@citrix.com List-Id: xen-devel@lists.xenproject.org Signed-off-by: Stefano Stabellini Acked-by: Ian Campbell --- tools/memshr/bidir-hash.c | 31 +++++++++++++++++++++++++++++++ 1 files changed, 31 insertions(+), 0 deletions(-) diff --git a/tools/memshr/bidir-hash.c b/tools/memshr/bidir-hash.c index 6c0dc3d..45d473e 100644 --- a/tools/memshr/bidir-hash.c +++ b/tools/memshr/bidir-hash.c @@ -109,6 +109,37 @@ static void hash_resize(struct __hash *h); } while (0) static inline void atomic_inc(uint32_t *v) { ia64_fetchadd4_rel(v, 1); } static inline void atomic_dec(uint32_t *v) { ia64_fetchadd4_rel(v, -1); } +#elif defined(__arm__) +static inline void atomic_inc(uint32_t *v) +{ + unsigned long tmp; + int result; + + __asm__ __volatile__("@ atomic_add\n" +"1: ldrex %0, [%3]\n" +" add %0, %0, #1\n" +" strex %1, %0, [%3]\n" +" teq %1, #0\n" +" bne 1b" + : "=&r" (result), "=&r" (tmp), "+Qo" (*v) + : "r" (v) + : "cc"); +} +static inline void atomic_dec(uint32_t *v) +{ + unsigned long tmp; + int result; + + __asm__ __volatile__("@ atomic_sub\n" +"1: ldrex %0, [%3]\n" +" sub %0, %0, #1\n" +" strex %1, %0, [%3]\n" +" teq %1, #0\n" +" bne 1b" + : "=&r" (result), "=&r" (tmp), "+Qo" (*v) + : "r" (v) + : "cc"); +} #else /* __x86__ */ static inline void atomic_inc(uint32_t *v) { -- 1.7.2.5