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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id z21-20020a1c4c15000000b003f42d2f4531sm5201321wmf.48.2023.05.18.05.51.18 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 May 2023 05:51:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1684414279; x=1687006279; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=qKdYxX6AGGIMH+Ujyu/x5WcZet6ovGbUI7+N7ydiBEM=; b=JgzWMLQdofTeXfc6H0zjC9o6PWM4osQ2fAMqZCXSe51+y8c7htKugE+hQ69qCi0qSL S3s3vQkLg7GeeBRQPdiy3XH037cWWVt0F13rT7/ZhMHx2bFAYwQlJDoAKo8wHC0pxFXt 0Zn2ufQd4GFOsNdd/oZbBXZVrtIv0RGSfuX1cXOpKJGNs1AT+X0eMluNs3eiLvyDVQIW wjGQi6qY3240/HDvh5uv763r1LX6q8HRxFkT59nUUigrd55NCww6GTfi+OyLf1GFX9KV NNVo1NL4GsvOkryODwKPHqKIzo/NBRWBO1hV3gkV47KelRblE5qNTfYz9snFRtAY2wd5 eb0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684414279; x=1687006279; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qKdYxX6AGGIMH+Ujyu/x5WcZet6ovGbUI7+N7ydiBEM=; b=jh6m98/x8Zm5CVtscxvZUfbKGPdZ4dqjo5FxqTbhiX07nh39jn6R0EwABZpzDKXX7c tRt06ggECds0W/EYsEIDC5iFkG3mykP8GWzlEuKIV9jr9D45/Ti+nryWl7BZuq5J32Hy Ns4Dnltj+5wL3IfPzDza/35Y7v45dHJDOeloFc5LDKHNt3WeKP97TKxmw0ZQku6p3jQP LQh5b78CYkO6+yrScViggGL4xbFUxXbQqy39q2nMwoOYhWKyX5Aj1F/fECLUbxVqYUip XvneB5igBerEpjCMzcxXLgGp4IFhxff7GZWUsgt7dEJXszRWpEXAsgfghPxGwd7YUQtA AawA== X-Gm-Message-State: AC+VfDz7KhbGZcjuLon3590rjNN9Qf5GuG/BM7rfpZMDqt+nXM8LVfZI NP1ed7elgAWJEWO4JwVrIzMDWXtNOvXPrymL4wI= X-Google-Smtp-Source: ACHHUZ4rJLc0v/FxkgdVrV2iJoUE0iTdKUXLv5RwPGWami8P606tF/SUosCZmkL7YywFSttv8KTmrA== X-Received: by 2002:a5d:428d:0:b0:306:37bf:ca5a with SMTP id k13-20020a5d428d000000b0030637bfca5amr1392742wrq.47.1684414279027; Thu, 18 May 2023 05:51:19 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 23/29] target/arm: Convert BR, BLR, RET to decodetree Date: Thu, 18 May 2023 13:51:01 +0100 Message-Id: <20230518125107.146421-24-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230518125107.146421-1-peter.maydell@linaro.org> References: <20230518125107.146421-1-peter.maydell@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=2a00:1450:4864:20::32f; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32f.google.com 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1684414395352100001 Content-Type: text/plain; charset="utf-8" Convert the simple (non-pointer-auth) BR, BLR and RET insns to decodetree. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-id: 20230512144106.3608981-18-peter.maydell@linaro.org --- target/arm/tcg/a64.decode | 5 ++++ target/arm/tcg/translate-a64.c | 55 ++++++++++++++++++++++++++++++---- 2 files changed, 54 insertions(+), 6 deletions(-) diff --git a/target/arm/tcg/a64.decode b/target/arm/tcg/a64.decode index 5b9e275b5f8..690dc107d41 100644 --- a/target/arm/tcg/a64.decode +++ b/target/arm/tcg/a64.decode @@ -19,6 +19,7 @@ # This file is processed by scripts/decodetree.py # =20 +&r rn &ri rd imm &rri_sf rd rn imm sf &i imm @@ -126,3 +127,7 @@ CBZ sf:1 011010 nz:1 ................... rt= :5 &cbz imm=3D%imm19 TBZ . 011011 nz:1 ..... .............. rt:5 &tbz imm=3D%imm14= bitpos=3D%imm31_19 =20 B_cond 0101010 0 ................... 0 cond:4 imm=3D%imm19 + +BR 1101011 0000 11111 000000 rn:5 00000 &r +BLR 1101011 0001 11111 000000 rn:5 00000 &r +RET 1101011 0010 11111 000000 rn:5 00000 &r diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c index a7ab89fdc8c..3af16e60b50 100644 --- a/target/arm/tcg/translate-a64.c +++ b/target/arm/tcg/translate-a64.c @@ -1388,6 +1388,53 @@ static bool trans_B_cond(DisasContext *s, arg_B_cond= *a) return true; } =20 +static void set_btype_for_br(DisasContext *s, int rn) +{ + if (dc_isar_feature(aa64_bti, s)) { + /* BR to {x16,x17} or !guard -> 1, else 3. */ + set_btype(s, rn =3D=3D 16 || rn =3D=3D 17 || !s->guarded_page ? 1 = : 3); + } +} + +static void set_btype_for_blr(DisasContext *s) +{ + if (dc_isar_feature(aa64_bti, s)) { + /* BLR sets BTYPE to 2, regardless of source guarded page. */ + set_btype(s, 2); + } +} + +static bool trans_BR(DisasContext *s, arg_r *a) +{ + gen_a64_set_pc(s, cpu_reg(s, a->rn)); + set_btype_for_br(s, a->rn); + s->base.is_jmp =3D DISAS_JUMP; + return true; +} + +static bool trans_BLR(DisasContext *s, arg_r *a) +{ + TCGv_i64 dst =3D cpu_reg(s, a->rn); + TCGv_i64 lr =3D cpu_reg(s, 30); + if (dst =3D=3D lr) { + TCGv_i64 tmp =3D tcg_temp_new_i64(); + tcg_gen_mov_i64(tmp, dst); + dst =3D tmp; + } + gen_pc_plus_diff(s, lr, curr_insn_len(s)); + gen_a64_set_pc(s, dst); + set_btype_for_blr(s); + s->base.is_jmp =3D DISAS_JUMP; + return true; +} + +static bool trans_RET(DisasContext *s, arg_r *a) +{ + gen_a64_set_pc(s, cpu_reg(s, a->rn)); + s->base.is_jmp =3D DISAS_JUMP; + return true; +} + /* HINT instruction group, including various allocated HINTs */ static void handle_hint(DisasContext *s, uint32_t insn, unsigned int op1, unsigned int op2, unsigned int c= rm) @@ -2186,12 +2233,8 @@ static void disas_uncond_b_reg(DisasContext *s, uint= 32_t insn) btype_mod =3D opc; switch (op3) { case 0: - /* BR, BLR, RET */ - if (op4 !=3D 0) { - goto do_unallocated; - } - dst =3D cpu_reg(s, rn); - break; + /* BR, BLR, RET : handled in decodetree */ + goto do_unallocated; =20 case 2: case 3: --=20 2.34.1