intlog10(9)

🎀 NAME 🎀

okay so this is intlog10(9) — it computes log10 of a value, and the result is shifted left by 24 bits. bestie, it's giving math but make it kernel ✨

✨ SYNOPSIS ✨

unsigned int intlog10 (u32 value );

🫶 ARGUMENTS 🫶

• value — the value you're putting in, and it must be != 0. no cap, zero is not invited to this party 💅

💅 DESCRIPTION 💅

so if you wanna use rational values, you can use this method:

intlog10(value) = intlog10(value * 10^x) - x * 2^24

here's a usecase example, bestie:

intlog10(1000) will give 3 << 24 = 3 * 2^24

but heads up 🫶 due to the implementation, intlog10(1000) might be not exactly 3 * 2^24. it's close, but not necessarily exact — lowkey important.

also, look at intlog2 for similar examples 👀

🌈 RETURN 🌈

log10(value) * 2^24

👀 SEE ALSO 👀

• Kernel file ./include/linux/int_log.h
• intlog2(9)

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made with 💖 from the ./include/linux corner, dated October 2026 🎀✨