So now:
(block_size)
mbits = nlog2(----------) = nlog2(block_size) - 3
( 8 )
Instead of:
( (block_size))
mbits = nlog2(floor(----------)) = nlog2(block_size & ~0x7) - 3
( ( 8 ))
This makes the post-log - 3 formula simpler, which we probably want to
prefer as it avoids a division. And ceiling is arguably more intuitive
corner case behavior.
This may seem like a minor detail, but because mbits is purely
block_size derived and not configurable, any quirks here will become
a permanent compatibility requirement.
And hey, it saves a couple bytes (I'm not really sure why, the division
should've been optimized to a shift):
code stack ctx
before: 35528 2440 636
after: 35520 (-0.0%) 2440 (+0.0%) 636 (+0.0%)
Christopher Haster
04d3002f3a