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#float

1 post1 participant0 posts today
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Gea-Suan Lin

用「加法」來計算浮點數乘法的近似值

在「Why Does Integer Addition Approximate Float Multiplication? (probablydance.com)」這邊看到的，原文在「Why Does Integer Addition Approximate Float Mu

blog.gslin.org/archives/2025/0

#Murmuring #754 #addition #approximate #approximation #float #ieee #integer #multiplication

Gea-Suan Lin's BLOG · 用「加法」來計算浮點數乘法的近似值在「Why Does Integer Addition Approximate Float Multiplication? (probablydance.com)」這邊看到的，原文在「Why Does Integer Addition Approximate Float Multiplication?」。 這邊的浮點數主要指的是 IEEE 754-1985 (32 bits 的 single precision 與 64 bits 的 double precision)，因為表示方式的性質，剛好讓「加法」與乘法的操作有點像。 這邊刻意用引號括弧起來的「加法」是直接把 IEEE 754...
Public
moki
lieber tristan, du wolltest gerne wissen, wie groß axolotl werden können: sie können zwischen 23 und 30 cm lang werden. sie werden bis zu 20 jahre alt. das einzigartige an ihnen ist, dass sich ihre organe wie gliedmaßen, auch teile des gehirns und des herzens nach einer verletzung vollständig wieder herstellen. wissenschaftler untersuchen warum diese amphibien das können. sie haben bereits herausgefunden, dass sie das größte genom besitzen, das bisher entschlüsselt wurde.

acrylic painting on canvas 2020

#axolotl #texcoco #lurch #Mexicanwalkingfish #salamander #walkingfish #endemism #painting #cave #mexico #exploration #science #regeneration #shadesofgreen #genome #olm #drift #float #moki #mioke
#mioke
Public
Chris Ruppel
OJEN COCKTAIL

3 dashes Peychauds bitters
¼ oz (optional) orgeat
2 oz Ojen anise liqueur

Garnish: Peychauds float
Method: Fill a chilled double old fashioned glass halfway with crushed ice, add the anise liqueur, optional orgeat, the initial dashes of Peychauds, and swizzle. Add more crushed ice and swizzle again. Finally, top with additional crushed ice until it is higher than the glass, and float the Peychauds bitters on top.

🔗 https://potentpotables.app/drinks/ojen-cocktail/

This one was inspired by @SonicAlligator@gram.social who recently posted a top-down photo of a negroni. The spec actually calls for crushed ice, but the large rock plus Peychauds float is still a really pretty effect IMO. It definitely needs crushed ice and a good swizzle to taste like the spec intends though. The spec comes from the book Cure: New Orleans drinks and how to mix 'em, page 51.

#alcohol #cocktail #cocktails #homeBar #mixology #ojen #anise #liqueur #peychauds #bitters #orgeat #almond #syrup #clearIce #float #drinkstodon #fedithirst
a top-down angle of a white cocktail with crystal clear hand-shaped large rock of ice and Peychauds bitters floated on top, sitting on a wooden table
#fedithirst
Public
Habr

Точность позиционирования объектов в играх: возможные ошибки

- Чем чревато брать float или double в качестве типа данных для хранения позиций объектов? - Как это может повлиять на наличие багов в игре и ошибки синхронизации сетевой игры или реплеев? Об этом вы узнаете в этом гайде с наглядными гифками и пруфом на C++

habr.com/ru/articles/876816/

#float #floating_point #precision #точность_вычислений #gamedev #разработка_игр #c++ #компилятор_оптимизация #движки #игровой_движок

ХабрТочность позиционирования объектов в играх: возможные ошибкиЕсли вы возьмёте тип float/double для хранения координат объектов, то получите плавные движения по экрану за счёт сохранения дробной части - игровые сущности смогут передвигаться по субпикселям, но...
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🇵🇸(🧆🏳️)Popolon🐷ᠫᠣᠫᠣᠯᠣᠨ🐎抱抱龙🐉بوبولون🤖🦧
Sophgo presented it's new SG2044 in #Shanghai today. That's an evolution of SG2042, with a 64 core based on an updated version of T-Head #RISCV C920 core, with RV #Vector extension 1.0 (RVV1.0) this time, and a new #Matrix extension, with matrix registers and tiles register (that's huge for #LinearAlgebra, there is some AI usage announced too). The specifications are in version 0.6 and proposed as RISC-V standard open extension, you can download the specs 0.6 of matrix extension from 24 december 2024 here. They also upgrade the frequency from 2.0 GHz to 2.5 GHz, PCI-e from Gen4 x32 to to Gen5.0 x80 and 4x DDR4@3200 o 8x LPDDR5x@9000. This will keep a 120W TDP.

A patched {Gnu toolchain (and SHL library & HHB toolkit for neural network usage) already allow to compile them, it will probably incorporated in mainline #GCC and #Linux, as previous T-Head extensions. And there are also patchs for #Qemu for testing. see the Xuantie RISC-V git repository on Github. These sources and patchs also include some examples.

exemple of RISC-V matrix extension #assembly multiplications:

#float matrix multiplication, output double_widen, md = md + ms1*ms2
mfmacc.h.e4 md, ms2, ms1
mfmacc.h.e5 md, ms2, ms1
mfmacc.bf16.e4 md, ms2, ms1
mfmacc.bf16.e5 md, ms2, ms1
mfmacc.s.bf16 md, ms2, ms1
mfmacc.s.h md, ms2, ms1
mfmacc.d.s md, ms2, ms1
Schema of a mfmacc.s assembly instruction that multiply two 4×4 matrix of 32 bits elements. and put the result in third one.
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Unité de Recherche Géoazur

Félicitations à notre collègue Yann Hello, Ingénieur de recherche à l'#IRD qui reçoit le prix Adrien Constantin de Magny 2024 de l'Académie des sciences.

Ce prix lui a été remis le 15 octobre 2024 au palais de l’Institut de France lors d'une cérémonie exceptionnelle. Le prix Adrien Constantin de Magny, récompense des travaux scientifiques ayant des applications notables dans le domaine de l'industrie.

geoazur.oca.eu/fr/acc-geoazur/

Yann Hello, Ingénieur de Recherche, vérifie le matériel avant d'embarquer
Yann Hello, Ingénieur de Recherche, met à l'eau une bouée MERMAID
#academiedessciences#cnrs#ifremer
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