instruction tables
Previously, all of the internals that handled how the instruction tables
are initialized were exposed externally. However, this can all be made
private to each CPU backend.
If each backend has an Init() function, then this is where the instruction
tables should be initialized, it shouldn't be the responsibility of
external code to ensure internal validity.
This allows for getting rid of all the table initialization shenanigans
within JitInterface and PPCTables.
The class itself already acts as a namespace trailer, so '_interpreter'
isn't necessary. This also gets rid of a duplicate typedef in the
Interpreter_Tables.
GetOpInfo was returning null pointers for invalid ops in subtables
instead of asserting an error. This was causing segfaults when the
jit tried to jit invalid code.
Doesn't support all the FPSCR flags, just the FPRF ones.
Add PPCAnalyzer support to remove unnecessary FPRF calculations.
POV-ray benchmark with enableFPRF forced on for an extreme comparison:
Before: 1500s
After, fmul/fmadd only: 728s
After, all float: 753s
In real games that use FPRF, like F-Zero GX, FPRF previously cost a few percent
of total runtime.
Since FPRF is so much faster now, if enableFPRF is set, just do it for every
float instruction, not just fmul/fmadd like before. I don't know if this will
fix any games, but there's little good reason not to.
