crc32_le_vgfm_generic(9)

💅 crc32_le_vgfm_generic(9) — bestie edition 🎀

okay so this is a page from the Kernel API Manual, and it's all about crc32_le_vgfm_generic — literally the girlboss that computes CRC-32 (the LE variant, obviously) using vector registers ✨

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🌸 NAME 🌸

crc32_le_vgfm_generic — compute CRC-32 (LE variant) with vector registers. that's it, that's the function, and she ate 💅

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🦋 SYNOPSIS 🦋

u32 crc32_le_vgfm_generic (u32 crc , unsigned char const *buf , size_t
size , unsigned long *constants );

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🎀 ARGUMENTS 🎀

• crc — the initial CRC value, typically ~0. your starting point, your origin story, your main character entrance 💖
• buf — input buffer pointer. heads up: performance might be improved if the buffer is on a doubleword boundary. so like,,, align her if you want her to slay faster ⭐
• size — size of the buffer, and it must be 64 bytes or greater. no exceptions bestie, this is a hard requirement 🚨
• constants — CRC-32 constant pool base pointer. she needs her constants, it's giving support system 🫶

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🔥 DESCRIPTION 🔥

okay so register usage, and this is the part where you take notes because it's literally a whole seating chart:

• V0 — initial CRC value and intermediate constants and results. the main character register, honestly 👑
• V1..V4 — data for CRC computation. the crunch squad 💪
• V5..V8 — next data chunks that are fetched from the input buffer. they're waiting in the wings, ready for their moment 🌈
• V9 — constant for BE->LE conversion and shift operations. the translator, the vibe-checker, the one who makes everyone understand each other 🧚
• V10..V14 — CRC-32 constants. the constants, obviously, doing constant things 💜

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⭐ SEE ALSO ⭐

• Kernel file ./lib/crc/s390/crc32le-vx.c — go read the source, iykyk 💀

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and that's the whole page, no cap 🦋 go forth and compute those CRCs

mwah 💋 — brought to you by the fine folks over at ./lib/crc/s390, dated October 2026, no notes, iconic behavior only 🎀✨