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([2602:47:d49d:ec01:bbf3:9914:aa9c:3b4e]) by smtp.gmail.com with ESMTPSA id g184-20020a6252c1000000b00535d19c46d7sm2199904pfb.203.2022.08.18.20.26.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Aug 2022 20:26:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=x19w7YfjB2h5oqwKEQEJIlPdiLtoIpQZ8bzoyerjNiU=; b=x3AnRLgh42tz7kLYNwNWqMXuPeqOytRLrrz7c193IvW/VsNoMwYZd/ftwSPHA84Mlr agTuSj3JCR8n7Ilpov8gsJumCK8jLiMqltflCXru6142c8dyBUZVGUfyyO/s0jSujlko ZmO2gh1VRTiwEx88BLaGp0f274BWjIEyFh6YJaQo94xnvl0wv97TjGPRsBIffhhtP9zl SwVy9MptYOX8NzwRR9pn7Yk2Qa2E1wrq1rtW6wrZKC2qepCS7NrnWLKUmlfFgaI2pbR1 w8Mvx784Eono8H92WfNIQ7zANtxscFcVvqC+4dbG/3eoXKPcV6bviwLcypLLf7IQIVS4 uUsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=x19w7YfjB2h5oqwKEQEJIlPdiLtoIpQZ8bzoyerjNiU=; b=wy13lhDB0PyVjVfoXRf4qARR+OKDOxPh7eeaz7V60VmxyO51i1/aDUu/JAaXUz7gX/ NODDkDJFYO7CaCJpYjzlWXeGnQ2goMIN3GnyK8g/BW1VOFvaX2RZjc2FHEnypMQk56F9 fYgs55dOIgkKXcahi16oovggJ3SX5mCXxeOZKjG0vvar/C0EtpdHj9DaA6yOYrnB4bQg 9Lo6LCgQuSqWR9pwN8lsbABTg5rXUAR1rx42Ojym7jVuvE5jeE8c2NZsLSDtblX+rSOR 9gJMw0KEAp9ZaPx/Gs1SEby9b7I5JfHTHx1A68TZ6IAtWmY/3kZNjiU0m8dJzS2hShwV K4ZA== X-Gm-Message-State: ACgBeo3oAG+J/c5YpzeMDpJXbJWYg1MXVMjqYUqoHteMb9g61ZNXKnmC I3YK7kp0cXoeVdo523YXgSZqOSG6ywWM3A== X-Google-Smtp-Source: AA6agR7foEo/7M4C5ONOhvXQ8qEDEFguwnR+u/cXygoPZXDo9PsMwRUqDkwblXY+sMGxeAexNOqEBw== X-Received: by 2002:a17:90b:4c8c:b0:1fa:c44f:473a with SMTP id my12-20020a17090b4c8c00b001fac44f473amr7587509pjb.195.1660879600002; Thu, 18 Aug 2022 20:26:40 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: laurent@vivier.eu, iii@linux.ibm.com, dramforever@live.com, alistair.francis@wdc.com, alex.bennee@linaro.org Subject: [PATCH v6 20/21] target/riscv: Add MAX_INSN_LEN and insn_len Date: Thu, 18 Aug 2022 20:26:14 -0700 Message-Id: <20220819032615.884847-21-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220819032615.884847-1-richard.henderson@linaro.org> References: <20220819032615.884847-1-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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1034; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1034.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+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1660880633095100001 Content-Type: text/plain; charset="utf-8" These will be useful in properly ending the TB. Signed-off-by: Richard Henderson Reviewed-by: Alistair Francis --- target/riscv/translate.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 38666ddc91..a719aa6e63 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1022,6 +1022,14 @@ static uint32_t opcode_at(DisasContextBase *dcbase, = target_ulong pc) /* Include decoders for factored-out extensions */ #include "decode-XVentanaCondOps.c.inc" =20 +/* The specification allows for longer insns, but not supported by qemu. */ +#define MAX_INSN_LEN 4 + +static inline int insn_len(uint16_t first_word) +{ + return (first_word & 3) =3D=3D 3 ? 4 : 2; +} + static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opc= ode) { /* @@ -1037,7 +1045,7 @@ static void decode_opc(CPURISCVState *env, DisasConte= xt *ctx, uint16_t opcode) }; =20 /* Check for compressed insn */ - if (extract16(opcode, 0, 2) !=3D 3) { + if (insn_len(opcode) =3D=3D 2) { if (!has_ext(ctx, RVC)) { gen_exception_illegal(ctx); } else { --=20 2.34.1