From patchwork Wed May 4 20:12:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 9018611 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2EBCA9F1D3 for ; Wed, 4 May 2016 20:26:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4288B2020F for ; Wed, 4 May 2016 20:26:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CA46E201EC for ; Wed, 4 May 2016 20:26:22 +0000 (UTC) Received: from localhost ([::1]:50104 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay3NC-0008Gt-V3 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 04 May 2016 16:26:18 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47535) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay3D4-00049Y-4v for qemu-devel@nongnu.org; Wed, 04 May 2016 16:15:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ay3Cr-0004SQ-OK for qemu-devel@nongnu.org; Wed, 04 May 2016 16:15:44 -0400 Received: from smtp1-g21.free.fr ([212.27.42.1]:35011) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ay3Cr-0004L3-H5 for qemu-devel@nongnu.org; Wed, 04 May 2016 16:15:37 -0400 Received: from Quad.localdomain (unknown [IPv6:2a01:e34:eeee:5240:12c3:7bff:fe6b:9a76]) by smtp1-g21.free.fr (Postfix) with ESMTPS id AD5EDB00345; Wed, 4 May 2016 20:08:59 +0200 (CEST) From: Laurent Vivier To: qemu-devel@nongnu.org Date: Wed, 4 May 2016 22:12:05 +0200 Message-Id: <1462392752-17703-26-git-send-email-laurent@vivier.eu> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1462392752-17703-1-git-send-email-laurent@vivier.eu> References: <1462392752-17703-1-git-send-email-laurent@vivier.eu> X-detected-operating-system: by eggs.gnu.org: Windows NT kernel [generic] [fuzzy] X-Received-From: 212.27.42.1 Subject: [Qemu-devel] [PATCH 25/52] target-m68k: Optimize gen_flush_flags X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , rth@twiddle.net, schwab@linux-m68k.org, agraf@suse.de, gerg@uclinux.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Richard Henderson Signed-off-by: Richard Henderson Signed-off-by: Laurent Vivier --- target-m68k/translate.c | 56 +++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 52 insertions(+), 4 deletions(-) diff --git a/target-m68k/translate.c b/target-m68k/translate.c index cc8a000..58cc9d9 100644 --- a/target-m68k/translate.c +++ b/target-m68k/translate.c @@ -456,18 +456,66 @@ static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base) static void gen_flush_flags(DisasContext *s) { - TCGv tmp; + TCGv t0, t1; switch (s->cc_op) { case CC_OP_FLAGS: return; + + case CC_OP_ADD: + tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + /* Compute signed overflow for addition. */ + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V); + tcg_temp_free(t1); + break; + + case CC_OP_SUB: + tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + /* Compute signed overflow for subtraction. */ + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1); + tcg_temp_free(t1); + break; + + case CC_OP_CMP: + tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V); + tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V); + /* Compute signed overflow for subtraction. */ + t0 = tcg_temp_new(); + tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N); + tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N); + tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0); + tcg_temp_free(t0); + tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z); + break; + + case CC_OP_LOGIC: + tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); + tcg_gen_movi_i32(QREG_CC_C, 0); + tcg_gen_movi_i32(QREG_CC_V, 0); + break; + case CC_OP_DYNAMIC: gen_helper_flush_flags(cpu_env, QREG_CC_OP); break; + default: - tmp = tcg_const_i32(s->cc_op); - gen_helper_flush_flags(cpu_env, tmp); - tcg_temp_free(tmp); + t0 = tcg_const_i32(s->cc_op); + gen_helper_flush_flags(cpu_env, t0); + tcg_temp_free(t0); break; }