REG_FIELD_PREP8(9)

📦 version 7.3.1, in nixpkgs unstable

💅 REG_FIELD_PREP8(9) — bestie edition 🎀

okay so this is REG_FIELD_PREP8, straight out of the Kernel API Manual, and honestly? she's a tiny little function with main character energy. let's get into it 💖

✨ NAME ✨

REG_FIELD_PREP8 — Prepare a u8 bitfield value 🦋

like, literally that's her whole job. preparing a bitfield value. a u8 one. she's not doing extra, she's not doing less. iconic behavior tbh.

🌸 SYNOPSIS 🌸

REG_FIELD_PREP8 (__mask , __val );

two arguments, one call, zero drama. we love to see it 🫶

🎀 ARGUMENTS 🎀

  • __mask — the shifted mask that defines the field's length and its position. she's the blueprint, she's the map, she's telling everyone where the field lives and how big it is 💅
  • __val — the value you're putting in the field. the actual payload. the guest of honor 🌟

🔥 DESCRIPTION 🔥

so what is this actually doing? it's a local copy of FIELD_PREP, and it exists for a few very specific reasons, bestie:

  • it generates an integer constant expression ⭐
  • it forces u8 (no cap, u8 is the whole vibe) 💀
  • and it's there for consistency with REG_FIELD_GET8, REG_BIT8 and REG_GENMASK8 — the whole little friend group has to match, you know? 👑

so yeah, she's basically the FIELD_PREP of the 8-bit world, keeping the squad aesthetically consistent. 🧚

🌈 RETURN 🌈

you get __val masked and shifted into the field defined by __mask. that's it, that's the return value. masked ✅ shifted ✅ into the right field ✅ slay 💅

👑 SEE ALSO 👑

go check out the kernel file ./include/drm/intel/reg_bits.h — that's the home base, that's the address 📍

and then the whole crew:

all of them, linked, accounted for, not a single one left behind. periodt. 💖

ngl this page is short but she ate. no bugs listed, no warnings, no environment variables — just a clean little u8 moment. 🌸

and that's the whole page, bestie! shipped from ./include/drm/intel, dated October 2026, footer and all — we mentioned it, so nothing got lost, and everything still lines up with the original. you're welcome, mwah 😘💜

📦 where this page comes from