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Marchesi" To: Yonghong Song Cc: Eduard Zingerman , Yonghong Song , bpf@vger.kernel.org, Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Fangrui Song , kernel-team@fb.com, cupertino.miranda@oracle.com, david.faust@oracle.com Subject: Re: [PATCH bpf-next v2 00/15] bpf: Support new insns from cpu v4 In-Reply-To: (Yonghong Song's message of "Mon, 17 Jul 2023 14:52:32 -0700") References: <20230713060718.388258-1-yhs@fb.com> <8b3e804bc23d44ba3a30b9d69e6590bede857ed3.camel@gmail.com> Date: Fri, 21 Jul 2023 16:56:03 +0200 Message-ID: <87351h8gak.fsf@oracle.com> User-Agent: Gnus/5.13 (Gnus v5.13) Content-Type: text/plain X-ClientProxiedBy: LO4P265CA0152.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:2c7::15) To BYAPR10MB2888.namprd10.prod.outlook.com (2603:10b6:a03:88::32) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR10MB2888:EE_|CH2PR10MB4230:EE_ X-MS-Office365-Filtering-Correlation-Id: a16f40d0-6e0c-4e3b-8530-08db89faa0f2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Where is the precise "pseudo-c" syntax used by the new instructions documented? For ALU sdiv/smod we are using: rd s/= rs rd s%= rs For ALU32 sdiv/smod we are using: wd s/= ws wd s%= ws For ALU movs instruction I just made up: rd s= (i8) rs rd s= (i16) rs rd s= (i32) rs For ALU32 movs I just made up: wd s= (i8) ws wd s= (i16) ws wd s= (i32) ws Thanks!