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Thu, 15 Jan 2026 01:13:54 -0800 (PST) Received: from sifive.com ([136.226.240.171]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-35267809f4esm1505246a91.9.2026.01.15.01.13.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jan 2026 01:13:54 -0800 (PST) Date: Thu, 15 Jan 2026 17:13:51 +0800 From: Max Chou To: Richard Henderson Cc: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, Palmer Dabbelt , Alistair Francis , Aurelien Jarno , Peter Maydell , Alex =?utf-8?Q?Benn=C3=A9e?= , Weiwei Li , Daniel Henrique Barboza , Liu Zhiwei Subject: Re: [PATCH 03/18] fpu/softfloat: Add convert operations(bf16, fp32) for OFP8 data types Message-ID: References: <20260108151650.16329-1-max.chou@sifive.com> <20260108151650.16329-4-max.chou@sifive.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=2607:f8b0:4864:20::1032; envelope-from=max.chou@sifive.com; helo=mail-pj1-x1032.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 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 2026-01-10 14:20, Richard Henderson wrote: > I suggest you pass that as a bool parameter to bfloat16_to_float8_e4m3 etc. > This would then be handled as part of round-and-pack, maybe a separate step, > maybe via float_round_nearest_even_max. > Thanks for the suggestion! Will replace the format saturate flag by a bool parameter of convert function at v2. > I'm not sure what to do with arm_althp vs ocpfp. It seems like they have a > couple of things in common. Perhaps we should decompose these to separate > behavior flags. > > > r~ I agree that we should decompose these to seperate behavior flags. I will try to introduce some behavior flas (liked no infinity, maximum normal pattern, etc.) at v2. rnax