#include <IOKit/audio/BigNum128.h>
Kernel (KEXT) › IOKit

IOKit/audio/BigNum128.h Kernel.framework

includes: libkern/OSTypes.h, Kernel/stdint.h
1 function

functionUInt64mult

extern U128 UInt64mult(const uint64_t A, const uint64_t B)
▾
claude-fable-5, 2026-08-24 · not from Apple sources · verified against xnu SDK Kernel.framework IOKit/audio/BigNum128.h
Returns the full 128-bit product of the unsigned 64-bit integers A and B as a U128 (hi/lo pair). Part of IOAudioFamily's big-number support used for sample-time arithmetic; the implementation is in IOAudioFamily, not xnu.