mult_func(9)

💅 mult_func(9) — a Kernel API Manual moment ✨

okay so bestie, welcome to the mult_func(9) page in the Kernel API Manual. This one is short, it is direct, and it is lowkey iconic for not wasting anybody's time. It's here to emulate a MULT instruction, and that's the whole serve. 🎀

💖 NAME 💖

mult_func — Emulate a MULT instruction. That's it, that's the name section, and it ate. 💅

✨ SYNOPSIS ✨

Here's the exact signature, bestie — do not freehand this:

int mult_func (struct pt_regs *regs , u32 ir );

🎀 ARGUMENTS 🎀

Two arguments, both doing their little jobs. Let's go:

• regs — Process register set. Like, the process's register set, periodt. 🫶
• ir — Instruction. The instruction itself. No cap. 👑

🦋 DESCRIPTION 🦋

Returns 0 since it always succeeds. The way this has zero drama is honestly aspirational 😭✨ — it always succeeds, and it hands back 0. Main character behavior fr fr.

👑 SEE ALSO 👑

Kernel file ./arch/mips/kernel/mips-r2-to-r6-emul.c is the spot, and the whole friend group is linked here. iykyk 🌈:

• mipsr6_emul(9)
• movf_func(9)
• movt_func(9)
• jr_func(9)
• movz_func(9)
• movn_func(9)
• mfhi_func(9)
• mthi_func(9)
• mflo_func(9)
• mtlo_func(9)
• multu_func(9)
• div_func(9)
• divu_func(9)
• dmult_func(9)
• dmultu_func(9)
• ddiv_func(9)
• ddivu_func(9)
• madd_func(9)
• maddu_func(9)
• msub_func(9)
• msubu_func(9)
• mul_func(9)
• clz_func(9)
• clo_func(9)
• dclz_func(9)
• dclo_func(9)
• mipsr2_decoder(9)

source/version ./arch/mips/kernel 🫶 dated October 2026 🌸 signed mult_func(9) 💖