From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753543AbcFGXfr (ORCPT ); Tue, 7 Jun 2016 19:35:47 -0400 Received: from mga11.intel.com ([192.55.52.93]:36598 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752802AbcFGXbS (ORCPT ); Tue, 7 Jun 2016 19:31:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,436,1459839600"; d="scan'208";a="117879955" From: "H. Peter Anvin" To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Linux Kernel Mailing List Cc: Peter Zijlstra , Andy Lutomirski , Borislav Petkov Subject: [PATCH 05/10] x86, asm: change GEN_*_RMWcc() to use CC_SET()/CC_OUT() Date: Tue, 7 Jun 2016 16:31:04 -0700 Message-Id: <1465342269-492350-6-git-send-email-hpa@linux.intel.com> X-Mailer: git-send-email 2.7.3.0.11.gd79db92 In-Reply-To: <1465342269-492350-1-git-send-email-hpa@linux.intel.com> References: <1465342269-492350-1-git-send-email-hpa@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Change the GEN_*_RMWcc() macros to use the CC_SET()/CC_OUT() macros defined in , and disable the use of asm goto if __GCC_ASM_FLAG_OUTPUTS__ is enabled. This allows gcc to receive the flags output directly in gcc 6+. Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/rmwcc.h | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/x86/include/asm/rmwcc.h b/arch/x86/include/asm/rmwcc.h index e3264c4..661dd30 100644 --- a/arch/x86/include/asm/rmwcc.h +++ b/arch/x86/include/asm/rmwcc.h @@ -1,7 +1,9 @@ #ifndef _ASM_X86_RMWcc #define _ASM_X86_RMWcc -#ifdef CC_HAVE_ASM_GOTO +#if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO) + +/* Use asm goto */ #define __GEN_RMWcc(fullop, var, cc, ...) \ do { \ @@ -19,13 +21,15 @@ cc_label: \ #define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ __GEN_RMWcc(op " %1, " arg0, var, cc, vcon (val)) -#else /* !CC_HAVE_ASM_GOTO */ +#else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ + +/* Use flags output or a set instruction */ #define __GEN_RMWcc(fullop, var, cc, ...) \ do { \ bool c; \ - asm volatile (fullop "; set" #cc " %1" \ - : "+m" (var), "=qm" (c) \ + asm volatile (fullop ";" CC_SET(cc) \ + : "+m" (var), CC_OUT(cc) (c) \ : __VA_ARGS__ : "memory"); \ return c; \ } while (0) @@ -36,6 +40,6 @@ do { \ #define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ __GEN_RMWcc(op " %2, " arg0, var, cc, vcon (val)) -#endif /* CC_HAVE_ASM_GOTO */ +#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ #endif /* _ASM_X86_RMWcc */ -- 2.7.3.0.11.gd79db92