From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38315) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b10kO-0008KH-Pz for qemu-devel@nongnu.org; Thu, 12 May 2016 20:14:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b10kM-0002eu-IT for qemu-devel@nongnu.org; Thu, 12 May 2016 20:14:27 -0400 Received: from mail-qg0-x242.google.com ([2607:f8b0:400d:c04::242]:33276) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b10kM-0002eo-Eg for qemu-devel@nongnu.org; Thu, 12 May 2016 20:14:26 -0400 Received: by mail-qg0-x242.google.com with SMTP id 90so6865289qgz.0 for ; Thu, 12 May 2016 17:14:26 -0700 (PDT) Sender: Richard Henderson From: Richard Henderson Date: Thu, 12 May 2016 14:13:04 -1000 Message-Id: <1463098420-29113-4-git-send-email-rth@twiddle.net> In-Reply-To: <1463098420-29113-1-git-send-email-rth@twiddle.net> References: <1463098420-29113-1-git-send-email-rth@twiddle.net> Subject: [Qemu-devel] [PULL 03/39] 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: peter.maydell@linaro.org, Sergey Fedorov , Sergey Fedorov 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 Message-Id: <1461341333-19646-3-git-send-email-sergey.fedorov@linaro.org> Signed-off-by: Richard Henderson --- include/qemu/osdep.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index e3bc50b..1e3221c 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 -- 2.5.5