From patchwork Fri Sep 6 06:50:30 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 273083 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id BC9F22C008A for ; Fri, 6 Sep 2013 16:54:01 +1000 (EST) Received: from localhost ([::1]:35379 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VHpvb-0004p6-MC for incoming@patchwork.ozlabs.org; Fri, 06 Sep 2013 02:53:59 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32937) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VHptI-00016g-Q1 for qemu-devel@nongnu.org; Fri, 06 Sep 2013 02:51:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VHptD-0005Bl-05 for qemu-devel@nongnu.org; Fri, 06 Sep 2013 02:51:36 -0400 Received: from mail-qc0-x234.google.com ([2607:f8b0:400d:c01::234]:34042) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VHptC-0005BZ-Sr for qemu-devel@nongnu.org; Fri, 06 Sep 2013 02:51:30 -0400 Received: by mail-qc0-f180.google.com with SMTP id p19so1356442qcv.25 for ; Thu, 05 Sep 2013 23:51:30 -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:in-reply-to:references; bh=HDOgps7EZgwqXDayjmesjaLuXFi4X3t9johtRqcmjc0=; b=cQRKYIhLBEWzBD3GBVuFMVPjB6VosTJAMP0HqGrlyVIdbmf75IyO2ZXu+AFSOT1AOM Gu4Mi8j8jL3vFBPKYdnTjPoxlHWpFCMjWYqS0plNOyO1UkIb8WImqgDVfGNL/igARbOv +ckHgbVx+BPhdfxO2DIKWCdBAiAfThJstPKEooeQNaYSd4KFjH20D4D4OMvxLNqI5zEx jYASdquSfytyQfprftA6PS9kyl1IitChKVP1yGV0WCMBOhpRpwRaHLTHAfBkQreWgONH gdh1V3DOpH1HvdA8V3M6Gd9uML1+SRaUIlh6c1NiRutzhnpcCLA1eg/eYSlrewYWaZ0f W4Gw== X-Received: by 10.229.224.65 with SMTP id in1mr1151254qcb.17.1378450290438; Thu, 05 Sep 2013 23:51:30 -0700 (PDT) Received: from pebble.com (50-194-63-110-static.hfc.comcastbusiness.net. [50.194.63.110]) by mx.google.com with ESMTPSA id i10sm1688981qev.8.1969.12.31.16.00.00 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Thu, 05 Sep 2013 23:51:29 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 5 Sep 2013 23:50:30 -0700 Message-Id: <1378450242-27080-9-git-send-email-rth@twiddle.net> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1378450242-27080-1-git-send-email-rth@twiddle.net> References: <1378450242-27080-1-git-send-email-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2607:f8b0:400d:c01::234 Cc: aurelien@aurel32.net, Richard Henderson Subject: [Qemu-devel] [PATCH 08/19] tcg-ia64: Use SUB_A3 and ADDS_A4 for subtraction 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 We can subtract from more small constants that just 0 with one insn, and we can add the negative for most small constants. Signed-off-by: Richard Henderson --- tcg/ia64/tcg-target.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c index 1659421..cc8c7a9 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -1078,6 +1078,28 @@ static inline void tcg_out_add(TCGContext *s, TCGReg ret, TCGReg arg1, } } +static inline void tcg_out_sub(TCGContext *s, TCGReg ret, TCGArg arg1, + int const_arg1, TCGArg arg2, int const_arg2) +{ + if (const_arg1 && arg1 == (int8_t)arg1) { + if (const_arg2) { + tcg_out_movi(s, TCG_TYPE_I64, ret, arg1 - arg2); + return; + } + tcg_out_bundle(s, mmI, + INSN_NOP_M, + INSN_NOP_M, + tcg_opc_a3(TCG_REG_P0, OPC_SUB_A3, ret, arg1, arg2)); + } else if (const_arg2 && -arg2 == sextract64(-arg2, 0, 14)) { + tcg_out_bundle(s, mmI, + INSN_NOP_M, + INSN_NOP_M, + tcg_opc_a4(TCG_REG_P0, OPC_ADDS_A4, ret, -arg2, arg1)); + } else { + tcg_out_alu(s, OPC_SUB_A1, ret, arg1, 0, arg2, 0); + } +} + static inline void tcg_out_eqv(TCGContext *s, TCGArg ret, TCGArg arg1, int const_arg1, TCGArg arg2, int const_arg2) @@ -2083,8 +2105,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, break; case INDEX_op_sub_i32: case INDEX_op_sub_i64: - tcg_out_alu(s, OPC_SUB_A1, args[0], args[1], const_args[1], - args[2], const_args[2]); + tcg_out_sub(s, args[0], args[1], const_args[1], args[2], const_args[2]); break; case INDEX_op_and_i32: