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[174.21.149.226]) by smtp.gmail.com with ESMTPSA id b29sm240462pgn.15.2020.05.04.09.33.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 May 2020 09:33:29 -0700 (PDT) Subject: Re: [PATCH RFC] target/arm: Implement SVE2 fp multiply-add long To: Stephen Long , qemu-devel@nongnu.org References: <20200504154303.5230-1-steplong@quicinc.com> From: Richard Henderson Message-ID: <9120944e-86a0-82b6-5d04-d679518616b7@linaro.org> Date: Mon, 4 May 2020 09:33:27 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200504154303.5230-1-steplong@quicinc.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::441; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x441.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN 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: qemu-arm@nongnu.org, apazos@quicinc.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 5/4/20 8:43 AM, Stephen Long wrote: > + for (i = 0; i < opr_sz; i += sizeof(float32)) { > + float32 nn = *(float16 *)(vn + H1_2(i + sel1)); > + float32 mm = *(float16 *)(vm + H1_2(i + sel1)); For integers we could rely on C types for the extension. For floating point, you need to call float16_to_float32 here. r~