From patchwork Thu Oct 31 20:21:57 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 287614 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 6ADAE2C03AB for ; Fri, 1 Nov 2013 07:48:40 +1100 (EST) Received: from localhost ([::1]:59199 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VbyrM-00022T-3V for incoming@patchwork.ozlabs.org; Thu, 31 Oct 2013 16:28:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53132) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VbylE-0002je-5d for qemu-devel@nongnu.org; Thu, 31 Oct 2013 16:22:38 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Vbyl8-0000QW-Ch for qemu-devel@nongnu.org; Thu, 31 Oct 2013 16:22:32 -0400 Received: from mail-pa0-x236.google.com ([2607:f8b0:400e:c03::236]:65138) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Vbyl8-0000QD-4O for qemu-devel@nongnu.org; Thu, 31 Oct 2013 16:22:26 -0400 Received: by mail-pa0-f54.google.com with SMTP id fa1so3070570pad.27 for ; Thu, 31 Oct 2013 13:22:25 -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=KR62cFuzDVBrxpoGUUkkZVFv6VgMalTnBYgpKnJqYVs=; b=Kvl5loyKeaIoql37P5cni+iMMDOEwt1DYIbCZpFKYhcw/pGnYUyZwq435pnq3oaCNA A5DwIPpB94WX9u20J0hb3WjZm1IJsrSZG+SgsJVC1R87/pZnt8WPT7Po0BIzyUgCWR46 ZSZuudu5hkJvd9ycidQ1mqUqLt9LHb2I2oXpt0ye3Km5Q94bu56ngQKY7jpu3M1bizYH 006BXkkb/m4yd++Q0LvgZaFeQeOQnlNFg76b3gxLDA05Z77wRpoFD7nhkoXpZE3RMuDN zuv95ZzvE7z2XmxGZnBMFdw0UYykxTYnFbCIs+wlaYTzw529o3JjXsN/hrp+P+frtnxH e9qA== X-Received: by 10.67.23.227 with SMTP id id3mr3847742pad.101.1383250944435; Thu, 31 Oct 2013 13:22:24 -0700 (PDT) Received: from pebble.twiddle.net (50-194-63-110-static.hfc.comcastbusiness.net. [50.194.63.110]) by mx.google.com with ESMTPSA id ve9sm6109179pbc.19.2013.10.31.13.22.23 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 31 Oct 2013 13:22:23 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Thu, 31 Oct 2013 13:21:57 -0700 Message-Id: <1383250929-10288-9-git-send-email-rth@twiddle.net> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1383250929-10288-1-git-send-email-rth@twiddle.net> References: <1383250929-10288-1-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:f8b0:400e:c03::236 Cc: aliguori@amazon.com, aurelien@aurel32.net Subject: [Qemu-devel] [PATCH 08/20] 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 Acked-by: Aurelien Jarno --- 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 be74606..d7bccd2 100644 --- a/tcg/ia64/tcg-target.c +++ b/tcg/ia64/tcg-target.c @@ -1080,6 +1080,28 @@ 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, const_arg1, arg2, const_arg2); + } +} + static inline void tcg_out_eqv(TCGContext *s, TCGArg ret, TCGArg arg1, int const_arg1, TCGArg arg2, int const_arg2) @@ -2085,8 +2107,7 @@ 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: