Crate simdprune

Pruning elements in SIMD vectors

This crate is a port of Daniel Lemire’s C library simdprune.

The mask “marks” values in the input for deletion. So if the mask is odd, then the first value is marked for deletion. This function produces a new vector that start with all values that have not been deleted.

Passing a mask of 0 would simply copy the provided vector.

Note that this is the opposite of the mask behavior of AVX512 VCOMPRESS/VPCOMRESS instructions. If you have AVX512 much of this crate can be performed with those instructions.

Examples

See prune_epi32.

Features

All features below are enabled by default.

• std - Enables the standard library. Disabling this enables the no_std crate attribute.
• large_tables - Enables functions like prune_epi8 which require large tables (>1MB). Disabling this may speed up compilation.

Functions

pext_prune256_epi32^⚠avx2,bmi2

Prune 32-bit floating-point values. Uses 64bit pdep/pext to save a step in unpacking.

prune256_epi32^⚠avx2

Prune 32-bit integer values.

prune256_ps^⚠avx2

Prune 32-bit floating-point values.

prune_epi8^⚠large_tables and ssse3

Prune 8-bit values.

prune_epi16^⚠ssse3

Prune 8-bit values.

prune_epi32^⚠ssse3

Prune 32-bit integer values.

prune_ps^⚠ssse3

Prune 32-bit floating-point values.

skinnyprune_epi8^⚠ssse3

Prune 8-bit values. Like prune_epi8 but uses a <1kB table.

thinprune_epi8^⚠ssse3

Prune 8-bit values. Like prune_epi8 but uses a 2kB table.