From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932916AbcFHTsC (ORCPT ); Wed, 8 Jun 2016 15:48:02 -0400 Received: from terminus.zytor.com ([198.137.202.10]:41274 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932725AbcFHTr7 (ORCPT ); Wed, 8 Jun 2016 15:47:59 -0400 Date: Wed, 8 Jun 2016 12:47:22 -0700 From: "tip-bot for H. Peter Anvin" Message-ID: Cc: peterz@infradead.org, linux-kernel@vger.kernel.org, luto@kernel.org, hpa@zytor.com, bp@suse.de, mingo@kernel.org, tglx@linutronix.de Reply-To: mingo@kernel.org, tglx@linutronix.de, luto@kernel.org, bp@suse.de, hpa@zytor.com, linux-kernel@vger.kernel.org, peterz@infradead.org In-Reply-To: <1465414726-197858-5-git-send-email-hpa@linux.intel.com> References: <1465414726-197858-5-git-send-email-hpa@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/asm] x86, asm: define CC_SET() and CC_OUT() macros Git-Commit-ID: ff3554b409b82d349f71e9d7082648b7b0a1a5bb X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: ff3554b409b82d349f71e9d7082648b7b0a1a5bb Gitweb: http://git.kernel.org/tip/ff3554b409b82d349f71e9d7082648b7b0a1a5bb Author: H. Peter Anvin AuthorDate: Wed, 8 Jun 2016 12:38:40 -0700 Committer: H. Peter Anvin CommitDate: Wed, 8 Jun 2016 12:41:20 -0700 x86, asm: define CC_SET() and CC_OUT() macros The CC_SET() and CC_OUT() macros can be used together to take advantage of the new __GCC_ASM_FLAG_OUTPUTS__ feature in gcc 6+ while remaining backwards compatible. CC_SET() generates a SET instruction on older compilers; CC_OUT() makes sure the output is received in the correct variable. Signed-off-by: H. Peter Anvin Link: http://lkml.kernel.org/r/1465414726-197858-5-git-send-email-hpa@linux.intel.com Reviewed-by: Andy Lutomirski Reviewed-by: Borislav Petkov Acked-by: Peter Zijlstra (Intel) --- arch/x86/include/asm/asm.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index f5063b6..7acb51c 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -42,6 +42,18 @@ #define _ASM_SI __ASM_REG(si) #define _ASM_DI __ASM_REG(di) +/* + * Macros to generate condition code outputs from inline assembly, + * The output operand must be type "bool". + */ +#ifdef __GCC_ASM_FLAG_OUTPUTS__ +# define CC_SET(c) "\n\t/* output condition code " #c "*/\n" +# define CC_OUT(c) "=@cc" #c +#else +# define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" +# define CC_OUT(c) [_cc_ ## c] "=qm" +#endif + /* Exception table entry */ #ifdef __ASSEMBLY__ # define _ASM_EXTABLE_HANDLE(from, to, handler) \