From patchwork Tue Sep 6 03:40:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Gibson X-Patchwork-Id: 666226 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 3sSvHL1q0wz9s5g for ; Tue, 6 Sep 2016 14:48:14 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b=e21dqYyW; dkim-atps=neutral Received: from localhost ([::1]:58500 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bh8It-0002Jt-6Y for incoming@patchwork.ozlabs.org; Tue, 06 Sep 2016 00:48:11 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48428) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bh7ED-0000y9-Qe for qemu-devel@nongnu.org; Mon, 05 Sep 2016 23:39:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bh7E4-00078a-Kz for qemu-devel@nongnu.org; Mon, 05 Sep 2016 23:39:16 -0400 Received: from ozlabs.org ([103.22.144.67]:59265) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bh7E3-0006zO-SW; Mon, 05 Sep 2016 23:39:08 -0400 Received: by ozlabs.org (Postfix, from userid 1007) id 3sSslP5mPfz9vFL; Tue, 6 Sep 2016 13:38:56 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1473133137; bh=j5U0FesDvQ6zfZnqOqYzXh+NfEcCeqouk2713y6HLiw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e21dqYyWd35ioDgnam2HGeMMZ0czAC0icKCFXRPtDh9m6yojwKEUuHKVfjE/Leo9H JGeMbeMl63gwwlGJR+Xb6rQDc/tSIQylPL/Nu9xTMQsX9qVsXpcUzrxzerfwVdtYYA tXTa36t7vQWlhwUAfSQIBC+/4ybNSciF1XFH+8ss= From: David Gibson To: peter.maydell@linearo.org Date: Tue, 6 Sep 2016 13:40:34 +1000 Message-Id: <1473133253-17598-48-git-send-email-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1473133253-17598-1-git-send-email-david@gibson.dropbear.id.au> References: <1473133253-17598-1-git-send-email-david@gibson.dropbear.id.au> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 103.22.144.67 Subject: [Qemu-devel] [PULL 47/66] target-ppc: implement branch-less divd[o][.] 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: David Gibson , qemu-ppc@nongnu.org, agraf@suse.de, Nikunj A Dadhania , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Nikunj A Dadhania Similar to divw, implement branch-less divd. Signed-off-by: Nikunj A Dadhania Reviewed-by: Richard Henderson Signed-off-by: David Gibson --- target-ppc/translate.c | 48 ++++++++++++++++++++++++++---------------------- 1 file changed, 26 insertions(+), 22 deletions(-) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index f69836d..5fe7a9d 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -1170,37 +1170,41 @@ GEN_DIVE(divweo, divwe, 1); static inline void gen_op_arith_divd(DisasContext *ctx, TCGv ret, TCGv arg1, TCGv arg2, int sign, int compute_ov) { - TCGLabel *l1 = gen_new_label(); - TCGLabel *l2 = gen_new_label(); + TCGv_i64 t0 = tcg_temp_new_i64(); + TCGv_i64 t1 = tcg_temp_new_i64(); + TCGv_i64 t2 = tcg_temp_new_i64(); + TCGv_i64 t3 = tcg_temp_new_i64(); - tcg_gen_brcondi_i64(TCG_COND_EQ, arg2, 0, l1); - if (sign) { - TCGLabel *l3 = gen_new_label(); - tcg_gen_brcondi_i64(TCG_COND_NE, arg2, -1, l3); - tcg_gen_brcondi_i64(TCG_COND_EQ, arg1, INT64_MIN, l1); - gen_set_label(l3); - tcg_gen_div_i64(ret, arg1, arg2); - } else { - tcg_gen_divu_i64(ret, arg1, arg2); - } - if (compute_ov) { - tcg_gen_movi_tl(cpu_ov, 0); - } - tcg_gen_br(l2); - gen_set_label(l1); + tcg_gen_mov_i64(t0, arg1); + tcg_gen_mov_i64(t1, arg2); if (sign) { - tcg_gen_sari_i64(ret, arg1, 63); + tcg_gen_setcondi_i64(TCG_COND_EQ, t2, t0, INT64_MIN); + tcg_gen_setcondi_i64(TCG_COND_EQ, t3, t1, -1); + tcg_gen_and_i64(t2, t2, t3); + tcg_gen_setcondi_i64(TCG_COND_EQ, t3, t1, 0); + tcg_gen_or_i64(t2, t2, t3); + tcg_gen_movi_i64(t3, 0); + tcg_gen_movcond_i64(TCG_COND_NE, t1, t2, t3, t2, t1); + tcg_gen_div_i64(ret, t0, t1); } else { - tcg_gen_movi_i64(ret, 0); + tcg_gen_setcondi_i64(TCG_COND_EQ, t2, t1, 0); + tcg_gen_movi_i64(t3, 0); + tcg_gen_movcond_i64(TCG_COND_NE, t1, t2, t3, t2, t1); + tcg_gen_divu_i64(ret, t0, t1); } if (compute_ov) { - tcg_gen_movi_tl(cpu_ov, 1); - tcg_gen_movi_tl(cpu_so, 1); + tcg_gen_mov_tl(cpu_ov, t2); + tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov); } - gen_set_label(l2); + tcg_temp_free_i64(t0); + tcg_temp_free_i64(t1); + tcg_temp_free_i64(t2); + tcg_temp_free_i64(t3); + if (unlikely(Rc(ctx->opcode) != 0)) gen_set_Rc0(ctx, ret); } + #define GEN_INT_ARITH_DIVD(name, opc3, sign, compute_ov) \ static void glue(gen_, name)(DisasContext *ctx) \ { \