ASE: mathutils.hh: improve fast_log2, add fast_log2_block - Githubissues

tim-janik / anklang

MIDI and Audio Synthesizer and Composer

https://anklang.testbit.eu/

Mozilla Public License 2.0

55 stars 4 forks source link

ASE: mathutils.hh: improve fast_log2, add fast_log2_block #64

Open swesterfeld opened 5 months ago

swesterfeld commented 5 months ago

avoid using a union in fast_log2 (fix undefined behaviour)
make code auto vectorizable by gcc
add a block version for fast_log2 (should be auto vectorized)
assume sign bit == 0, makex exponent extraction easier