From patchwork Thu Sep 27 17:19:53 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 187420 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id EB2D42C0079 for ; Fri, 28 Sep 2012 03:27:06 +1000 (EST) Received: from localhost ([::1]:49284 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THHrd-0008UT-1E for incoming@patchwork.ozlabs.org; Thu, 27 Sep 2012 13:27:05 -0400 Received: from eggs.gnu.org ([208.118.235.92]:55278) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THHrS-0008Si-C8 for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:26:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1THHrN-0005tk-7r for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:26:54 -0400 Received: from mail-pb0-f45.google.com ([209.85.160.45]:57826) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1THHrN-0005tX-1Y for qemu-devel@nongnu.org; Thu, 27 Sep 2012 13:26:49 -0400 Received: by pbbrp2 with SMTP id rp2so3914753pbb.4 for ; Thu, 27 Sep 2012 10:26:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; bh=tqPTun5x7Lw1NuDpJSuxzi6MpQLjIdNlQVWXd/nDtlw=; b=tkX79YR6FV48KKVjhW2vgqCNCpeD4vavqFYGrIhMjRXf58tLxRNefTZg6K8P3Rg45F nzyktYOToCgKWDsyA5M9oKhpp2+peydQEbXyOzlk15kMO6gwwY6QN6oNKgggYDbYCoya HuHtqK77zO4RdgGR3yONu/zipkSbGsKDbcU4VwGKR5AUH5UMwOdhs8COofsnvdQFGgnv 6NTjnae8Ydt0YdeLfP6BZBN9ylOoGPl3HEXmWVbIBtFfKEJ3bvHfOcc9XhHhzLyWVFPt STWpcYpjXCUGrMp9Cw284s2ee22KY6wfjAzlRNP9hbfV3TiJhEjIs3g5HgnidOsAdFyQ bmVg== Received: by 10.66.88.3 with SMTP id bc3mr11082441pab.51.1348766410006; Thu, 27 Sep 2012 10:20:10 -0700 (PDT) Received: from anchor.twiddle.home.com ([173.160.232.49]) by mx.google.com with ESMTPS id jw14sm4118581pbb.36.2012.09.27.10.20.09 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 27 Sep 2012 10:20:09 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 27 Sep 2012 10:19:53 -0700 Message-Id: <1348766397-20731-4-git-send-email-rth@twiddle.net> X-Mailer: git-send-email 1.7.11.4 In-Reply-To: <1348766397-20731-1-git-send-email-rth@twiddle.net> References: <1348766397-20731-1-git-send-email-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.160.45 Cc: Aurelien Jarno Subject: [Qemu-devel] [PATCH 3/7] tcg: Swap commutative double-word comparisons X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Richard Henderson Reviewed-by: Aurelien Jarno --- tcg/optimize.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tcg/optimize.c b/tcg/optimize.c index 004c336..d39926e 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -397,6 +397,22 @@ static bool swap_commutative(TCGArg dest, TCGArg *p1, TCGArg *p2) return false; } +static bool swap_commutative2(TCGArg *p1, TCGArg *p2) +{ + int sum = 0; + sum += temps[p1[0]].state == TCG_TEMP_CONST; + sum += temps[p1[1]].state == TCG_TEMP_CONST; + sum -= temps[p2[0]].state == TCG_TEMP_CONST; + sum -= temps[p2[1]].state == TCG_TEMP_CONST; + if (sum > 0) { + TCGArg t; + t = p1[0], p1[0] = p2[0], p2[0] = t; + t = p1[1], p1[1] = p2[1], p2[1] = t; + return true; + } + return false; +} + /* Propagate constants and copies, fold constant expressions. */ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args, TCGOpDef *tcg_op_defs) @@ -475,6 +491,16 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, swap_commutative(args[0], &args[2], &args[4]); swap_commutative(args[1], &args[3], &args[5]); break; + case INDEX_op_brcond2_i32: + if (swap_commutative2(&args[0], &args[2])) { + args[4] = tcg_swap_cond(args[4]); + } + break; + case INDEX_op_setcond2_i32: + if (swap_commutative2(&args[1], &args[3])) { + args[5] = tcg_swap_cond(args[5]); + } + break; default: break; }