USUBBORROW(3G)

💖 NAME 💖

okay so bestie, welcome to usubBorrow — she subtracts unsigned integers and generates borrow. that's the whole vibe. it's from the 3G manual section, which is giving "OpenGL shading language core functions" energy, iykyk 💅

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✨ DECLARATION ✨

like, here's literally how you call her:

genUType usubBorrow(genUType x, genUType y, out genUType borrow);

she takes two genUTypes and an out param. main character behavior fr fr 🫶

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🌸 PARAMETERS 🌸

• x — the first vector to be used in the subtraction operation. she's the one being subtracted FROM, so pay attention bestie 👑
• y — the second vector to be used in the subtraction operation. the one doing the subtracting 💅
• borrow — the variable that receives the borrow output of the difference. yes it's out, yes it gets written, no you don't pass it by value, okurrr 🎀

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🦋 DESCRIPTION 🦋

okay so here's the tea, and it's actually kind of iconic:

usubBorrow subtracts two 32-bit unsigned integer variables (scalars or vectors, she does both, she's versatile like that ✨) and generates a 32-bit unsigned integer result, along with a borrow output.

The result is the difference of x and y if non-negative, or 232 plus that difference otherwise.

And borrow? The value borrow is set to 0 if x ≥ y and to 1 otherwise. no cap, that's literally it 💖

lowkey the borrow flag is the whole point bestie — it's how you know the subtraction went ✨under✨ zero and wrapped around. it's giving unsigned arithmetic with receipts 🧾

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🌈 VERSION SUPPORT 🌈

so which OpenGL Shading Language versions let you have her? let's do a little vibe check across the eras 💀

• OpenGL Shading Language 1.10 — -
• OpenGL Shading Language 1.20 — -
• OpenGL Shading Language 1.30 — -
• OpenGL Shading Language 1.40 — -
• OpenGL Shading Language 1.50 — -
• OpenGL Shading Language 3.30 — -
• OpenGL Shading Language 4.00 — ✔
• OpenGL Shading Language 4.10 — ✔
• OpenGL Shading Language 4.20 — ✔
• OpenGL Shading Language 4.30 — ✔
• OpenGL Shading Language 4.40 — ✔
• OpenGL Shading Language 4.50 — ✔

so like… she didn't exist until 4.00 and then she ATE and never left. periodt 💅🔥 (the function name across all of those columns is, obviously, usubBorrow.)

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🎀 SEE ALSO 🎀

• uaddCarry()

(the carry sibling!! she borrows, they carry, it's a whole dynamic, obsessed 🫶)

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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/.

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💜 COPYRIGHT 💜

Copyright © 2011-2014 Khronos Group

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and that's the page bestie!! 🌟 this was [FIXME: source], dated 01/03/2018, and you just read USUBBORROW(3G) — go forth and subtract with borrows responsibly, mwah 💋💖✨