From patchwork Thu Dec 13 13:45:04 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 1872341 Return-Path: X-Original-To: patchwork-linux-sparse@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 2D2E9DF2EF for ; Thu, 13 Dec 2012 13:45:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753376Ab2LMNpI (ORCPT ); Thu, 13 Dec 2012 08:45:08 -0500 Received: from merlin.infradead.org ([205.233.59.134]:53853 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751597Ab2LMNpH (ORCPT ); Thu, 13 Dec 2012 08:45:07 -0500 Received: from shinybook.infradead.org ([2001:8b0:10b:1:e6ce:8fff:fe1f:f2c0]) by merlin.infradead.org with esmtpsa (Exim 4.76 #1 (Red Hat Linux)) id 1Tj961-0007WI-F4 for linux-sparse@vger.kernel.org; Thu, 13 Dec 2012 13:45:06 +0000 Message-ID: <1355406304.19560.39.camel@shinybook.infradead.org> Subject: [PATCH] Add GCC's byteswap intrinsics From: David Woodhouse To: linux-sparse@vger.kernel.org Date: Thu, 13 Dec 2012 13:45:04 +0000 X-Mailer: Evolution 3.6.2 (3.6.2-3.fc18) Mime-Version: 1.0 Sender: linux-sparse-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org Signed-off-by: David Woodhouse --- I'm about to make the kernel use these: http://git.infradead.org/users/dwmw2/byteswap.git lib.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/lib.c b/lib.c index 396e9f1..d747a3e 100644 --- a/lib.c +++ b/lib.c @@ -698,6 +698,11 @@ void declare_builtin_functions(void) add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n"); add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n"); + /* And byte-swapping operations.. */ + add_pre_buffer("extern short __builtin_bswap16(short);\n"); + add_pre_buffer("extern int __builtin_bswap32(int);\n"); + add_pre_buffer("extern long long __builtin_bswap64(long long);\n"); + /* And some random ones.. */ add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n"); add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");