From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NWpKz-0001hi-33 for qemu-devel@nongnu.org; Mon, 18 Jan 2010 06:00:01 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NWpKu-0001fQ-4y for qemu-devel@nongnu.org; Mon, 18 Jan 2010 06:00:00 -0500 Received: from [199.232.76.173] (port=51049 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NWpKt-0001fI-Uo for qemu-devel@nongnu.org; Mon, 18 Jan 2010 05:59:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:55918) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NWpKt-0002GC-GE for qemu-devel@nongnu.org; Mon, 18 Jan 2010 05:59:55 -0500 Date: Mon, 18 Jan 2010 12:56:30 +0200 From: "Michael S. Tsirkin" Message-ID: <20100118105630.GB8277@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: [Qemu-devel] [PATCHv2 1/3] bwap: add qemu_bswap helper List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: qemu-devel@nongnu.org, agraf@suse.de, Blue Swirl , Isaku Yamahata , paul@codesourcery.com, Aurelien Jarno add helper that can swap values of 4, 2, 1 bytes Signed-off-by: Michael S. Tsirkin --- bswap.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/bswap.h b/bswap.h index 4558704..aace9b7 100644 --- a/bswap.h +++ b/bswap.h @@ -214,4 +214,10 @@ static inline void cpu_to_be32wu(uint32_t *p, uint32_t v) #undef le_bswaps #undef be_bswaps +/* len must be one of 1, 2, 4 */ +static inline uint32_t qemu_bswap_len(uint32_t value, int len) +{ + return bswap32(value) >> (32 - 8 * len); +} + #endif /* BSWAP_H */ -- 1.6.6.144.g5c3af