[Libre-soc-bugs] [Bug 238] POWER Compressed Formal Standard writeup

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=238

--- Comment #169 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Luke Kenneth Casson Leighton from comment #167)

> we do not have enough info to say if the mode should be implicitly 3.0b or
> 3.0bthen16 when M=0
> 
> i will make a TODO note.

nnope.  couldn't stand it.

instead, i cut the brownfield encoding space in half, by shifting the bits 0-4
over by one, making room for N.

this makes Cmaj.m=0b001.1 uniform and consistent when it comes to observing M
and N, at the expense of halving the unallocated space in this weird
sub-sub-space.

it's a reasonable tradeoff.

the downside is that crops can only target CR0-3 now.

-- 
You are receiving this mail because:
You are on the CC list for the bug.