fixp_linear_interpolate(9)

📦 version 7.3.1, in nixpkgs unstable

💖 fixp_linear_interpolate(9) — like, the Kernel API Manual page, bestie 💖

okay so first things first: we're in the Kernel API Manual section (9), and the star of the show is fixp_linear_interpolate. she interpolates. she's linear. she's everything. 🎀

✨ NAME ✨

fixp_linear_interpolate — interpolates a value from two known points 🦋

like literally, you give her two points and an x, and she finds the y. math girlie behavior. no cap.

✨ SYNOPSIS ✨

int fixp_linear_interpolate (int x0 , int y0 , int x1 , int y1 , int x );

five ints in, one int out. that's the whole vibe check. 💅

✨ ARGUMENTS ✨

okay so here's the cast of characters, and yes every single one matters 🙈

  • x0 — x value of point 0 ✨
  • y0 — y value of point 0 🎀
  • x1 — x value of point 1 🌸
  • y1 — y value of point 1 🦋
  • x — the linear interpolant 👑 (this is the one you're actually asking about, she's the main character)
fr fr, don't mix up your x's and y's — points 0 and 1 are the two known points you're interpolating between, and x is the spot you want a value for. 🫶

✨ SEE ALSO ✨

go check out the kernel file ./include/linux/fixp-arith.h — that's where the magic lives 📁✨

and while you're there, the whole friend group:

iykyk 💜

that's the page!! sending you off with the official sign-off: this one's from ./include/linux and it's dated October 2026 — so yeah, she's from the future, iconic behavior honestly 🌈⭐💖

📦 where this page comes from