UADDCARRY(3G)

💖 NAME 💖

okay so this one's called uaddCarry — it adds unsigned integers and generates a carry. that's the whole gig. it's in the 3G manual, bestie, so we're in GLSL land now ✨

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📜 DECLARATION 📜

here's the exact signature, do not freestyle it:

genUType uaddCarry(genUType x, genUType y, out genUType carry);

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🫶 PARAMETERS 🫶

• x — the first vector going into the summation operation. yes babe, it's vector one 💅
• y — the second vector in the summation operation. the other half of the situationship 🦋
• carry — the variable that receives the carry output of the sum. it's an out param, so it's literally catching the overflow tea for you 🎀

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🌈 DESCRIPTION 🌈

so uaddCarry takes two 32-bit unsigned integer variables — could be scalars, could be vectors, either one, no judgment 🌸 — and it generates a 32-bit unsigned integer result, plus a carry output riding shotgun.

the result is the sum of x and y modulo 232. no cap.

and then carry? it gets set to 0 if the sum is less than 232, and to 1 otherwise. so it's basically the little flag that goes "hey girl, we overflowed 👀".

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👑 VERSION SUPPORT 👑

here's the vibe check on which OpenGL Shading Language Versions actually let you have this function. uaddCarry is the function name, and the columns are the GLSL versions:

• 1.10 — - (nope, not supported)
• 1.20 — - (still nope)
• 1.30 — -
• 1.40 — -
• 1.50 — -
• 3.30 — - (last of the no era, rip)
• 4.00 — ✔ (and suddenly she's supported, we love a glow up)
• 4.10 — ✔
• 4.20 — ✔
• 4.30 — ✔
• 4.40 — ✔
• 4.50 — ✔ (still eating, still iconic)

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👀 SEE ALSO 👀

• usubBorrow()

(yes that's her sister, go read it next 🫶)

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💜 COPYRIGHT 💜

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.

💜 COPYRIGHT 💜

Copyright © 2011-2014 Khronos Group

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and that's the whole page, bestie 💖 mwah. this was pulled from [FIXME: source] and dated 01/03/2018 — so if you're reading this in the group chat, yes, it's giving vintage, and yes, it still slays 🌟