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[67.170.74.237]) by smtp.gmail.com with ESMTPSA id r23-20020a17090b051700b0028b6759d8c1sm349996pjz.29.2024.01.04.17.31.34 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 04 Jan 2024 17:31:35 -0800 (PST) From: dthaler1968@googlemail.com X-Google-Original-From: To: "'Aoyang Fang \(SSE, 222010547\)'" , Cc: , References: <3A7D0A57-02EF-4ACB-A599-1029CFCA7E74@link.cuhk.edu.cn> <015701da3f41$eaab4d10$c001e730$@gmail.com> <20654405-C500-4A24-B09E-A28B25DF32AC@link.cuhk.edu.cn> In-Reply-To: <20654405-C500-4A24-B09E-A28B25DF32AC@link.cuhk.edu.cn> Subject: RE: [PATCH] update the consistency issue in documentation Date: Thu, 4 Jan 2024 17:31:33 -0800 Message-ID: <076801da3f76$eb0cdaf0$c12690d0$@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Content-Language: en-us Thread-Index: AQJcMuQj7ImLqPZXOVe7T7DiaRKhUwLxzd5EAg7D4uSvnoJBMA== Aoyang Fang (SSE, 222010547) wrote:=20 > If so, the value of arithmetic instructions=E2=80=99 code should be 4 = bit, rather than > BPF_ADD: 0x00, BPF_SUB: 0x10, BPF_MUL: 0x20. Otherwise the convention = of > arithmetic instruction is not consistent with the convention of jump > instructions. Good point, you are right that section 3.1 (Arithmetic instructions) and = 3.3 (Jump instructions) are not consistent with each other. Since 'code' is defined in section = 3 as a 4-bit field, I agree that it would be more consistent to change section 3.1 rather = than defining 8-bit values for a 4-bit field. 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