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[174.21.150.71]) by smtp.gmail.com with ESMTPSA id g7sm15785335pgg.50.2021.02.14.12.13.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 14 Feb 2021 12:13:18 -0800 (PST) Subject: Re: [PATCH v8 15/35] Hexagon (target/hexagon/arch.[ch]) utility functions To: Taylor Simpson , qemu-devel@nongnu.org References: <1612763186-18161-1-git-send-email-tsimpson@quicinc.com> <1612763186-18161-16-git-send-email-tsimpson@quicinc.com> From: Richard Henderson Message-ID: <3c036fc7-444f-6ea3-7b1c-2a42837fb5ac@linaro.org> Date: Sun, 14 Feb 2021 12:13:16 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1612763186-18161-16-git-send-email-tsimpson@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::632; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x632.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, NICE_REPLY_A=-0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ale@rev.ng, alex.bennee@linaro.org, philmd@redhat.com, laurent@vivier.eu, bcain@quicinc.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2/7/21 9:46 PM, Taylor Simpson wrote: > +uint32_t carry_from_add64(uint64_t a, uint64_t b, uint32_t c) > +{ > + uint64_t tmpa, tmpb, tmpc; > + tmpa = fGETUWORD(0, a); > + tmpb = fGETUWORD(0, b); > + tmpc = tmpa + tmpb + c; > + tmpa = fGETUWORD(1, a); > + tmpb = fGETUWORD(1, b); > + tmpc = tmpa + tmpb + fGETUWORD(1, tmpc); > + tmpc = fGETUWORD(1, tmpc); > + return tmpc; > +} I presume this is intended to compute carry-out from 64-bit addition with carry-in? uint64_t r = a + b; return c ? r <= a : r < a; > +static const int softfloat_roundingmodes[] = { FloatRoundMode > +static float32 float32_mul_pow2(float32 a, uint32_t p, float_status *fp_status) > +{ > + float32 b = make_float32((SF_BIAS + p) << SF_MANTBITS); > + return float32_mul(a, b, fp_status); > +} This is float32_scalbn. r~