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Questions - bit-packing

Are there bit (un)packing instructions in common x86_64 processor line mmx command for bytes?

dead hachers! Background: Maybe you know mmx packing/unpacking instruction set, what howewer works on bytes and larger volumes, like shorts, words, etc. Quesion: Are there any instructions for any x8...
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Peter Tschischik

x86

aes

instruction-set

des

bit-packing

Votes: 0

Answers: 0

How do I optimise numpy.packbits with numba?

I'm trying to optimise numpy.packbits: import numpy as np from numba import njit, prange @njit(parallel=True) def _numba_pack(arr, div, su): for i in prange(div): s = 0 for j in r...
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mathfux

python

numpy

numba

bit-packing

Votes: 0

Answers: 1

Latest Answer

There are several issue with the Numba implementation. One of them is that parallel loops breaks the constant propagation optimization in LLVM-Lite (the JIT-compiler used by Numba). This cause critica...
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Jérôme Richard

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