Module bmi2

Available on x86-64 only.

Bit Manipulation Instruction (BMI) Set 2.0.

The reference is Intel 64 and IA-32 Architectures Software Developer’s Manual Volume 2: Instruction Set Reference, A-Z.

Wikipedia provides a quick overview of the instructions available.

Functions

_bzhi_u64^⚠bmi2

Zeroes higher bits of a >= index.

_mulx_u64^⚠bmi2

Unsigned multiply without affecting flags.

_pdep_u64^⚠bmi2

Scatter contiguous low order bits of a to the result at the positions specified by the mask.

_pext_u64^⚠bmi2

Gathers the bits of x specified by the mask into the contiguous low order bit positions of the result.

x86_bmi2_bzhi_64 🔒 ^⚠

x86_bmi2_pdep_64 🔒 ^⚠

x86_bmi2_pext_64 🔒 ^⚠