From nobody Mon Feb 9 19:06:14 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1493188315811225.87757284105157; Tue, 25 Apr 2017 23:31:55 -0700 (PDT) Received: from localhost ([::1]:52916 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3GUU-00071g-4L for importer@patchew.org; Wed, 26 Apr 2017 02:31:54 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49647) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3GMU-0000em-7M for qemu-devel@nongnu.org; Wed, 26 Apr 2017 02:23:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3GMS-0000Oq-Bj for qemu-devel@nongnu.org; Wed, 26 Apr 2017 02:23:38 -0400 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:46587) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3GMO-0000Kv-HV; Wed, 26 Apr 2017 02:23:32 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailout.nyi.internal (Postfix) with ESMTP id 4275821CCE; Wed, 26 Apr 2017 02:23:32 -0400 (EDT) Received: from frontend1 ([10.202.2.160]) by compute4.internal (MEProxy); Wed, 26 Apr 2017 02:23:32 -0400 Received: from localhost (flamenco.cs.columbia.edu [128.59.20.216]) by mail.messagingengine.com (Postfix) with ESMTPA id EB4BF7E0A4; Wed, 26 Apr 2017 02:23:31 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=braap.org; h=cc :date:from:in-reply-to:message-id:references:subject:to :x-me-sender:x-me-sender:x-sasl-enc:x-sasl-enc; s=mesmtp; bh=15o sJEsGDnVzxhqZFHkOUQS7uBrU2al87S0YPknkkVM=; b=mzNkJp+FExFSZkUZL2Q 9Jf0v4xWd30rb2uIt/0EOwQq9+VIY1U+ZJW5hj3nbmfZNvWxf0EFULiUKS+rhbSJ TGCtVEV9veLrrlpk+knkPipP1OzNp6w2PB+5F0Nt02Qrnm5h0FLqTBfc4LjNeaZ+ Nb5hItvtLZhccO7Q4FGRZ1K0= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:date:from:in-reply-to:message-id :references:subject:to:x-me-sender:x-me-sender:x-sasl-enc :x-sasl-enc; s=fm1; bh=15osJEsGDnVzxhqZFHkOUQS7uBrU2al87S0YPknkk VM=; b=B8JXkCIpNe9x4TqSx6MBLW1HSmmTcv8kjAwcYKSQbJ4DGpOUmgBhm/XM2 fUSKfqsYKMoZSBaqyVcHhlyXYUh3eT7UGgF8/6+JxmejPEL6TikiavXL59wOCOvx CGYhYgRY6SSsS7RF2oqQ9qJBB0iqK/02wuyhDQJ0yIBcn75fimYsof6+Kh6mlvkG HDa43MWgo7FjdssFXdZbvh2QYN3JgzPk1J0R7er8a6BGWW9bLIgme4npbyyq7tcv RAVaqOi4p2nt7J3xyA2nseMruKqxeHJP1m1jdNGh+3ehbQ/ouNDbNTd0y8tZFlyH HHJqMw6o1NMoDGlG5fNzfGq9mfHZw== X-ME-Sender: X-Sasl-enc: TrZoq9ih4dSSs3gR1W5dw7aYyJCDSOdJuuB+x2HTqFCJ 1493187811 From: "Emilio G. Cota" To: qemu-devel@nongnu.org Date: Wed, 26 Apr 2017 02:23:22 -0400 Message-Id: <1493187803-4510-10-git-send-email-cota@braap.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1493187803-4510-1-git-send-email-cota@braap.org> References: <1493187803-4510-1-git-send-email-cota@braap.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.111.4.28 Subject: [Qemu-devel] [PATCH v3 09/10] target/i386: optimize indirect branches 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: Peter Maydell , Eduardo Habkost , Peter Crosthwaite , Stefan Weil , Alexander Graf , alex.bennee@linaro.org, qemu-arm@nongnu.org, Pranith Kumar , Paolo Bonzini , Aurelien Jarno , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Speed up indirect branches by jumping to the target if it is valid. Softmmu measurements (see later commit for user-mode numbers): Note: baseline (i.e. speedup =3D=3D 1x) is QEMU v2.9.0. - SPECint06 (test set), x86_64-softmmu (Ubuntu 16.04 guest= ). Host: Intel i7-4790K @ 4.00GHz 2.4x +-+------------------------------------------------------------------= --------------------------------------------+-+ | = | | cross = | 2.2x +cross+jr............................................................= ..............+++...........................+-+ | = | | | = +++ | | 2x +-+..................................................................= ............|..|............................+-+ | = | | | | = | | | 1.8x +-+..................................................................= ............|####...........................+-+ | = |# |# | | = **** |# | 1.6x +-+..................................................................= ..........*.|*.|#...........................+-+ | = * |* |# | | = * |* |# | 1.4x +-+..................................................................= .....+++..*.|*.|#...........................+-+ | ++++++ = #### * |*++# +++ | | +++ | | = #++# *++* # +++ | | 1.2x +-+......................###.....####....+++............|..|.........= ..****..#.*..*..#....####...|.###.....####..+-+ | +++ **** # **** # #### ***### = *++* # * * # #++# ****|# +++#++# | | ****### +++ *++* # *++* # ++# # #### *|* |# +++= * * # * * # *** # *| *|# **** # | 1x +-++-*++*++#++***###++*++*+#++*+-*++#+****++#++***++#+-*+*++#-+****##= ++*++*-+#+*++*-+#++*+*++#++*-+*+#++*++*++#-++-+ | * * # * * # * * # * * # * * # * * # *|* |# *++* #= * * # * * # * * # * * # * * # | | * * # * * # * * # * * # * * # * * # *+*++# * * #= * * # * * # * * # * * # * * # | 0.8x +-+--****###--***###--****##--****###-****###--***###--***###--****##= --****###-****###--***###--****##--****###--+-+ astar bzip2 gcc gobmk h264ref hmmlibquantum mcf om= netpperlbench sjengxalancbmk hmean png: http://imgur.com/DU36YFU NB. 'cross' represents the previous commit. Signed-off-by: Emilio G. Cota Reviewed-by: Richard Henderson --- target/i386/translate.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/target/i386/translate.c b/target/i386/translate.c index a065271..3bd80c0 100644 --- a/target/i386/translate.c +++ b/target/i386/translate.c @@ -4988,7 +4988,7 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, gen_push_v(s, cpu_T1); gen_op_jmp_v(cpu_T0); gen_bnd_jmp(s); - gen_eob(s); + gen_jr(s, cpu_T0); break; case 3: /* lcall Ev */ gen_op_ld_v(s, ot, cpu_T1, cpu_A0); @@ -5006,7 +5006,8 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, tcg_const_i32(dflag - 1), tcg_const_i32(s->pc - s->cs_base)); } - gen_eob(s); + tcg_gen_ld_tl(cpu_tmp4, cpu_env, offsetof(CPUX86State, eip)); + gen_jr(s, cpu_tmp4); break; case 4: /* jmp Ev */ if (dflag =3D=3D MO_16) { @@ -5014,7 +5015,7 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, } gen_op_jmp_v(cpu_T0); gen_bnd_jmp(s); - gen_eob(s); + gen_jr(s, cpu_T0); break; case 5: /* ljmp Ev */ gen_op_ld_v(s, ot, cpu_T1, cpu_A0); @@ -5029,7 +5030,8 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, gen_op_movl_seg_T0_vm(R_CS); gen_op_jmp_v(cpu_T1); } - gen_eob(s); + tcg_gen_ld_tl(cpu_tmp4, cpu_env, offsetof(CPUX86State, eip)); + gen_jr(s, cpu_tmp4); break; case 6: /* push Ev */ gen_push_v(s, cpu_T0); @@ -6409,7 +6411,7 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, /* Note that gen_pop_T0 uses a zero-extending load. */ gen_op_jmp_v(cpu_T0); gen_bnd_jmp(s); - gen_eob(s); + gen_jr(s, cpu_T0); break; case 0xc3: /* ret */ ot =3D gen_pop_T0(s); @@ -6417,7 +6419,7 @@ static target_ulong disas_insn(CPUX86State *env, Disa= sContext *s, /* Note that gen_pop_T0 uses a zero-extending load. */ gen_op_jmp_v(cpu_T0); gen_bnd_jmp(s); - gen_eob(s); + gen_jr(s, cpu_T0); break; case 0xca: /* lret im */ val =3D cpu_ldsw_code(env, s->pc); --=20 2.7.4