From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47035) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1atddp-0007sk-OX for qemu-devel@nongnu.org; Fri, 22 Apr 2016 12:09:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1atddo-0008F4-O1 for qemu-devel@nongnu.org; Fri, 22 Apr 2016 12:09:13 -0400 Received: from mail-lf0-x22c.google.com ([2a00:1450:4010:c07::22c]:35388) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1atddo-0008Ez-DQ for qemu-devel@nongnu.org; Fri, 22 Apr 2016 12:09:12 -0400 Received: by mail-lf0-x22c.google.com with SMTP id c126so82160898lfb.2 for ; Fri, 22 Apr 2016 09:09:12 -0700 (PDT) From: Sergey Fedorov Date: Fri, 22 Apr 2016 19:08:44 +0300 Message-Id: <1461341333-19646-3-git-send-email-sergey.fedorov@linaro.org> In-Reply-To: <1461341333-19646-1-git-send-email-sergey.fedorov@linaro.org> References: <1461341333-19646-1-git-send-email-sergey.fedorov@linaro.org> Subject: [Qemu-devel] [PATCH v2 02/11] include/qemu/osdep.h: Add macros for pointer alignment List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Sergey Fedorov , Paolo Bonzini , Peter Crosthwaite , Richard Henderson , Sergey Fedorov , Peter Maydell , "Daniel P. Berrange" , Eric Blake From: Sergey Fedorov These macros provide a convenient way to n-byte align pointers up and down and check if a pointer is n-byte aligned. Signed-off-by: Sergey Fedorov Signed-off-by: Sergey Fedorov --- include/qemu/osdep.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index e3bc50b61359..1e3221cbec65 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -161,6 +161,17 @@ extern int daemon(int, int); /* Check if n is a multiple of m */ #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) +/* n-byte align pointer down */ +#define QEMU_ALIGN_PTR_DOWN(p, n) \ + ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) + +/* n-byte align pointer up */ +#define QEMU_ALIGN_PTR_UP(p, n) \ + ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) + +/* Check if pointer p is n-bytes aligned */ +#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) + #ifndef ROUND_UP #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d)) #endif -- 2.8.1