From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27862 invoked by alias); 10 Aug 2014 03:47:33 -0000 Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org Received: (qmail 27852 invoked by uid 89); 10 Aug 2014 03:47:31 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=3.4 required=5.0 tests=AWL,BAYES_50,FREEMAIL_FROM,RDNS_DYNAMIC,SPF_SOFTFAIL,TVD_RCVD_IP,URI_HEX autolearn=no version=3.3.2 X-HELO: joe.nabble.com Received: from 216-139-250-139.aus.us.siteprotect.com (HELO joe.nabble.com) (216.139.250.139) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-SHA encrypted) ESMTPS; Sun, 10 Aug 2014 03:47:30 +0000 Received: from sam.nabble.com ([192.168.236.26]) by joe.nabble.com with esmtp (Exim 4.72) (envelope-from ) id 1XGK63-0006Uy-LY for gcc-help@gcc.gnu.org; Sat, 09 Aug 2014 20:47:03 -0700 Date: Sun, 10 Aug 2014 03:47:00 -0000 From: hanhwi To: gcc-help@gcc.gnu.org Message-ID: <1407642408642-1059079.post@n5.nabble.com> Subject: -mno-bmi doesn't work in GCC4.8.2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-SW-Source: 2014-08/txt/msg00076.txt.bz2 Hi, all, I'm using GCC 4.8.2 on x86-64 machine. The compiler emits tzcnt instruction unlike previous gcc. I want to prevent using tzcnt instruction. As I know, tzcnt instruction is BMI extension. To disable the feature, I set -mno-bmi but it didn't work. Is there any way to disable tzcnt instruction? Thanks, Hanhwi -- View this message in context: http://gcc.1065356.n5.nabble.com/mno-bmi-doesn-t-work-in-GCC4-8-2-tp1059079.html Sent from the gcc - Help mailing list archive at Nabble.com.