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[216.228.167.147]) by smtp.gmail.com with ESMTPSA id k4sm16074pgr.87.2020.08.25.14.01.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Aug 2020 14:01:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ifoPB2xrefiphamrfMAWhJL0YX7DJDQgoCM7PfPYN9w=; b=L8+p6R/NrJWjvoevG8i0efGK/CaF+nLXFjUrd+5bGITCdM8i2ZMWHVfrMHQeHyyYrA GqRp8pcBH0lawSum/RiwvgwFLZjfjuf5a3UlovS+R8bpFiUazFH2erecDWmaxA3zuVzp cn16Q/dnA4IEaF4h4CIyCGf/udMkD/eWGwgYn66Ok5JtetdGCsAzCQLMzawHkQLquZ83 aae+zYDIqdcZfs3rFGvz0M3MfSJt31jdlXu2BT5hpPt5+W6sOGfSfTeEDdEVAVY7veD7 kbkFUjNTnbRVmuZFhpT5UVGH8gb5f2lQbwqwK3xGaz260nMk+hKrQXGjEwRzHL7gnTeM gZgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ifoPB2xrefiphamrfMAWhJL0YX7DJDQgoCM7PfPYN9w=; b=S424+0vNCVpN3F++RLaOdLpe9gZEtAPCPJZomGHAZVX4xLNj5R/twmuc0QZAjqON4T K8/vnAbvGz9J1lWxMDb7KfFN9OrhX7KzWdxAN5ByrJGQjwsCOQGjvCFX5vtC6jOboSLT IyaSiYd3rQd9KNxLt1PfAfs4bSfMWr5pr55guxbM0OxpeBFJoqTurFyxsHU+IWR6jr7t JGasIZwmB+GcB0PBjSIY8AypCbuxRPwyIRcGuGloce3oqUMiwt0CFioSQaVqMBlpkP4V f35BxAojFe0Hgeva6UwNO71gQoLyXkwnHRvoIxXPmQuMhiLaWgrp8bOYvR9DuRmFGOvM cfXg== X-Gm-Message-State: AOAM533jtoL/yEMmC+VbvtnTLhqdCw7h1b9ccClvRp0ioSCl0KIQRIYX D8hu4HiNVTQjA759Sm1BtTfk4/tV4ILL/Q== X-Google-Smtp-Source: ABdhPJxcRwetxRYTk7PAppPF4pkrJZvL1MQI+ljU4lI6tdyG5ny1/tJiuk0SG2VK5JmniLU1RfaKJQ== X-Received: by 2002:a17:90b:2394:: with SMTP id mr20mr47671pjb.56.1598389272047; Tue, 25 Aug 2020 14:01:12 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 60/77] target/microblaze: Replace delayed_branch with tb_flags_to_set Date: Tue, 25 Aug 2020 13:59:33 -0700 Message-Id: <20200825205950.730499-61-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200825205950.730499-1-richard.henderson@linaro.org> References: <20200825205950.730499-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1042; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1042.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" The multi-stage counter can be replaced by clearing D_FLAG, the or'ing in tb_flags_to_set. The jump then happens when D_FLAG is finally cleared. Signed-off-by: Richard Henderson --- target/microblaze/translate.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c index 18009103c7..3ba2dc1800 100644 --- a/target/microblaze/translate.c +++ b/target/microblaze/translate.c @@ -73,7 +73,6 @@ typedef struct DisasContext { uint16_t imm; =20 unsigned int cpustate_changed; - unsigned int delayed_branch; unsigned int tb_flags; unsigned int tb_flags_to_set; int mem_index; @@ -1314,10 +1313,9 @@ static void eval_cond_jmp(DisasContext *dc, TCGv_i32= pc_true, TCGv_i32 pc_false) =20 static void dec_setup_dslot(DisasContext *dc) { - dc->delayed_branch =3D 2; - dc->tb_flags |=3D D_FLAG; + dc->tb_flags_to_set |=3D D_FLAG; if (dc->type_b && (dc->tb_flags & IMM_FLAG)) { - dc->tb_flags |=3D BIMM_FLAG; + dc->tb_flags_to_set |=3D BIMM_FLAG; } } =20 @@ -1329,7 +1327,6 @@ static void dec_bcc(DisasContext *dc) cc =3D EXTRACT_FIELD(dc->ir, 21, 23); dslot =3D dc->ir & (1 << 25); =20 - dc->delayed_branch =3D 1; if (dslot) { dec_setup_dslot(dc); } @@ -1405,7 +1402,6 @@ static void dec_br(DisasContext *dc) } } =20 - dc->delayed_branch =3D 1; if (dslot) { dec_setup_dslot(dc); } @@ -1625,8 +1621,7 @@ static void mb_tr_init_disas_context(DisasContextBase= *dcb, CPUState *cs) =20 dc->cpu =3D cpu; dc->tb_flags =3D dc->base.tb->flags; - dc->delayed_branch =3D !!(dc->tb_flags & D_FLAG); - dc->jmp =3D dc->delayed_branch ? JMP_INDIRECT : JMP_NOJMP; + dc->jmp =3D dc->tb_flags & D_FLAG ? JMP_INDIRECT : JMP_NOJMP; dc->cpustate_changed =3D 0; dc->abort_at_next_insn =3D 0; dc->ext_imm =3D dc->base.tb->cs_base; @@ -1697,11 +1692,11 @@ static void mb_tr_translate_insn(DisasContextBase *= dcb, CPUState *cs) tcg_gen_discard_i32(cpu_imm); } =20 - dc->tb_flags &=3D ~IMM_FLAG; + dc->tb_flags &=3D ~(IMM_FLAG | BIMM_FLAG | D_FLAG); dc->tb_flags |=3D dc->tb_flags_to_set; dc->base.pc_next +=3D 4; =20 - if (dc->delayed_branch && --dc->delayed_branch =3D=3D 0) { + if (dc->jmp !=3D JMP_NOJMP && !(dc->tb_flags & D_FLAG)) { if (dc->tb_flags & DRTI_FLAG) { do_rti(dc); } @@ -1711,8 +1706,6 @@ static void mb_tr_translate_insn(DisasContextBase *dc= b, CPUState *cs) if (dc->tb_flags & DRTE_FLAG) { do_rte(dc); } - /* Clear the delay slot flag. */ - dc->tb_flags &=3D ~D_FLAG; dc->base.is_jmp =3D DISAS_JUMP; } =20 --=20 2.25.1