From patchwork Tue Feb 18 01:15:56 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 321242 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)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 232242C00CD for ; Tue, 18 Feb 2014 12:17:26 +1100 (EST) Received: from localhost ([::1]:45447 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WFZJL-0005sx-SZ for incoming@patchwork.ozlabs.org; Mon, 17 Feb 2014 20:17:23 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60365) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WFZIP-0005IE-3T for qemu-devel@nongnu.org; Mon, 17 Feb 2014 20:16:30 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WFZIJ-0007aC-Ms for qemu-devel@nongnu.org; Mon, 17 Feb 2014 20:16:24 -0500 Received: from mail-qa0-x230.google.com ([2607:f8b0:400d:c00::230]:58578) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WFZIJ-0007a7-Ib for qemu-devel@nongnu.org; Mon, 17 Feb 2014 20:16:19 -0500 Received: by mail-qa0-f48.google.com with SMTP id f11so22763155qae.35 for ; Mon, 17 Feb 2014 17:16:19 -0800 (PST) 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=icJ9IGoR8SbLyzMBod8yHVLoVSnHM/vRqxaxvIuhOoc=; b=KjaSoNC3Sz7l43+RRQmhP89GlgwUAFHyLgk7octXqgNSJtmKLVgV7hFuJbHsUBob3S 7W5K+QQtt5rxP7futPOHAYU+SRdeReVhE/sgpWHrdCP3u/+kBfkkmtdxJ0U9NbHoPcuj Unznp89gFQQ1icbk/fzd/CEtErV9bA3mKFuM5B52gT6q3JCIIx2+yRGRB/GiYIxHkWwH PsEFwxDI10h+LK167vZo71FlwCVGY0lSQCPXnU2u4AqvCzrcrwsw74020qHSS0TIGYmL j59DDAXJn8UrP9Q9ZJpjrk3bm/DgXqa9K9oeTfnvtqs7cosDmh7Y8SqCI+XroOymJenX Vz6g== X-Received: by 10.140.90.80 with SMTP id w74mr6122727qgd.96.1392686179264; Mon, 17 Feb 2014 17:16:19 -0800 (PST) Received: from pike.twiddle.home.com ([12.236.175.36]) by mx.google.com with ESMTPSA id w2sm50415225qad.19.2014.02.17.17.16.17 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Feb 2014 17:16:18 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Date: Mon, 17 Feb 2014 19:15:56 -0600 Message-Id: <1392686165-10706-7-git-send-email-rth@twiddle.net> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1392686165-10706-1-git-send-email-rth@twiddle.net> References: <1392686165-10706-1-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:c00::230 Cc: Aurelien Jarno Subject: [Qemu-devel] [PULL 06/15] tcg/optimize: add known-zero bits compute for load ops 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 From: Aurelien Jarno Reviewed-by: Paolo Bonzini Signed-off-by: Aurelien Jarno Signed-off-by: Richard Henderson --- tcg/optimize.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 1cf017a..1b9fea5 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -779,13 +779,37 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, mask = temps[args[3]].mask | temps[args[4]].mask; break; + CASE_OP_32_64(ld8u): + case INDEX_op_qemu_ld8u: + mask = 0xff; + break; + CASE_OP_32_64(ld16u): + case INDEX_op_qemu_ld16u: + mask = 0xffff; + break; + case INDEX_op_ld32u_i64: +#if TCG_TARGET_REG_BITS == 64 + case INDEX_op_qemu_ld32u: +#endif + mask = 0xffffffffu; + break; + + CASE_OP_32_64(qemu_ld): + { + TCGMemOp mop = args[def->nb_oargs + def->nb_iargs]; + if (!(mop & MO_SIGN)) { + mask = (2ULL << ((8 << (mop & MO_SIZE)) - 1)) - 1; + } + } + break; + default: break; } /* 32-bit ops (non 64-bit ops and non load/store ops) generate 32-bit results */ - if (!(tcg_op_defs[op].flags & (TCG_OPF_CALL_CLOBBER | TCG_OPF_64BIT))) { + if (!(def->flags & (TCG_OPF_CALL_CLOBBER | TCG_OPF_64BIT))) { mask &= 0xffffffffu; }