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[83.57.168.235]) by smtp.gmail.com with ESMTPSA id z5sm10956187wrn.69.2021.05.29.09.54.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 29 May 2021 09:54:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=H/j00hEbe6+E9TUrgGoJ4busYCQdPM+IW6semZPtYG4=; b=sn+YCOf2BhZB8M9EYzyu/HdkiwbgV6ZGIp9ABRQf+EfCOZsMEGEXRJhH0y+D7Hntfl S0mHaf/uOyCbQ1aAU5+eG48u6UWOVcyj0se9aExnrLXRE03Br80dbt6MZZ/0g0lgv98I /WCxIFoP++0JPRgfAKq+ZeTXJt06nIdeATXWr+GVoWYoRcmHCz3NxpxzjUtPv0I3sfFb V8TvskGMSsyqrADP0Dl2sWYmevuCXsWRi7npVevL1T2Nzhf4UpOmgO906055R2yAi1hS ms1/sAcV+IhjeJ4a57FLbTmh4x0HPyfnFfj4ho9IaLOiRL2B6WV44FuidhnTLLT+l0Q8 tbHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :mime-version:content-transfer-encoding; bh=H/j00hEbe6+E9TUrgGoJ4busYCQdPM+IW6semZPtYG4=; b=IJNPboTtW0nog6/4j+PgyuFoP2VZjuPsA5qGADzgvuLjTJja+a4BJvrdoHk+ZnXqBn MlYkHu8sWfhFyhX+Qlgv2THrE82Cpg8bN8wfC/cJmxv/4cG0swTNu0H4A8rPV9TSb/ya aDelgEFD4lQHFS0if84lmKnRoQvc7P9GCCXUZOdeKJ9jR8XMzuRM011+YHmOfRJzRZKQ VR9xwdnnuKyz/wLFW9QTNwbMFr2058TZ5fRk/wmBeI3E5NP1bgY0jJyjMUzI2QHbUZqC v7ZJTs5KTZZfHim53rBySIuuXl19g6rEc8ebVPNjxrDwCDWW2KaIO7dLWMbgrgpBfmPC ATzw== X-Gm-Message-State: AOAM530juP3XqngFi5eP+q2fNbqvLFDE+3qvCO0JqAywzg9NvcS3rIer 4ss5RuZnqsBd5zxsVsQK6yJEoMzaJVC1lQ== X-Google-Smtp-Source: ABdhPJztxKmfKDOS6oU8LX+ghLTQOBdrkBDnKaGu19rQPqY/bx6L0iLzgH/tj6e8SZHDi0X+yXOqFw== X-Received: by 2002:a5d:5745:: with SMTP id q5mr14447900wrw.56.1622307285906; Sat, 29 May 2021 09:54:45 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH] target/mips: Raise exception when DINSV opcode used with DSP disabled Date: Sat, 29 May 2021 18:54:43 +0200 Message-Id: <20210529165443.1114402-1-f4bug@amsat.org> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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=2a00:1450:4864:20::436; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wr1-x436.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: Aleksandar Rikalo , Jia Liu , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Aurelien Jarno Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Per the "MIPS=C2=AE DSP Module for MIPS64 Architecture" manual, rev. 3.02, Table 5.3 "SPECIAL3 Encoding of Function Field for DSP Module": If the Module/ASE is not implemented, executing such an instruction must cause a Reserved Instruction Exception. The DINSV instruction lists the following exceptions: - Reserved Instruction - DSP Disabled If the MIPS core doesn't support the DSP module, or the DSP is disabled, do not handle the '$rt =3D $0' case as a no-op but raise the proper exception instead. Cc: Jia Liu Fixes: 1cb6686cf92 ("target-mips: Add ASE DSP bit/manipulation instructions= ") Signed-off-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson --- target/mips/tcg/translate.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c index c03a8ae1fed..6ccba34c050 100644 --- a/target/mips/tcg/translate.c +++ b/target/mips/tcg/translate.c @@ -24373,10 +24373,11 @@ static void decode_opc_special3_legacy(CPUMIPSSta= te *env, DisasContext *ctx) { TCGv t0, t1; =20 + check_dsp(ctx); + if (rt =3D=3D 0) { break; } - check_dsp(ctx); =20 t0 =3D tcg_temp_new(); t1 =3D tcg_temp_new(); --=20 2.26.3