Re: [B2-devel] Thoughts on SheepShaver and Basilisk II

[Robert M. <mr...@gm...>]

PPC_DECODE_CACHE enables a memory block decode_cache_p which holds up
to 32768 consecutive results of decode(opcode) for a block of
consecutive PPC instructions (32-bit words).

There is a profiling function enabled by PPC_PROFILE_COMPILE_TIME
which will record the amount of CPU time used by the decode cache
function, printing "compile" vs "predecode" time vs total emulation
time.

I'm also prone to wonder why PPC_DECODE_CACHE was disabled by default
-- it seems that if Gwenole went to all that effort implementing a
decode cache (it's about 150 lines of code), why would it be disabled
by default?

On 6/16/12, Alexei Svitkine <ale...@gm...> wrote:
> For example, let's take this commit by Tycho which kallisti5 pulled:
>
https://github.com/tycho/sheepshaver/commit/ceed8dca09fd5e5fe4e1bf9127d628382cb0f350
>
> Presumably this makes something faster. Maybe it does, it looks plausible -
> [...]

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