From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10025 invoked by alias); 23 Aug 2006 10:36:15 -0000 Received: (qmail 9907 invoked by uid 48); 23 Aug 2006 10:36:07 -0000 Date: Wed, 23 Aug 2006 10:36:00 -0000 Message-ID: <20060823103607.9906.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/27827] [4.0 Regression] gcc 4 produces worse x87 code on all platforms than gcc 3 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "oliver dot jennrich at googlemail dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2006-08/txt/msg01931.txt.bz2 List-Id: ------- Comment #68 from oliver dot jennrich at googlemail dot com 2006-08-23 10:36 ------- (In reply to comment #23) I read the discussion with a lot of interest - so here are the data for a Pentium-M: echo "GCC 3.x double performance:" GCC 3.x double performance: ./xdmm_gcc ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.281 1537.37 echo "GCC 4.x double performance:" GCC 4.x double performance: ./xdmm_gc4 ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.265 1630.19 echo "GCC 3.x single performance:" GCC 3.x single performance: ./xsmm_gcc ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.281 1537.37 echo "GCC 4.x single performance:" GCC 4.x single performance: ./xsmm_gc4 ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.266 1624.06 > Here is the machine breakdown as measured now: > LIKES GCC 4 DOESN'T CARE LIKES GCC 3 > =========== ============ =========== > CoreDuo Pentium 4 PentiumPRO > Pentium III > Pentium 4e > Pentium D > Athlon-64 X2 > Opteron So I guess the first column gets another entry: Pentium M -- oliver dot jennrich at googlemail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |oliver dot jennrich at | |googlemail dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27827