Instead of passing the value around constantly, just store it in the regcache,
note where it is, and restore it on the exception path.
This saves a whole bunch of pushing and popping and gives a ~5% speed boost
in Rebel Strike. It's a bit ugly, but it simplifies a lot of code and is
faster, too.
Should be slightly faster, and also lets us skip the nops on the way back.
Remove the trampoline cache, since it isn't really useful anymore with this.
Instead of jumping over update code and similar, just jump directly to the
handler.
This avoids redundant exception checks in the case where we can't do fastmem
memory operations (e.g. paired loadstore).
Small TLB lookup optimizations: this is the hot path for MMU code, so try to
make it better.
Template the TLB lookup functions based on the lookup type (opcode, data,
no exception).
Clean up the Read/Write functions and make them more consistent.
Add an early-exit path for MMU accesses to ReadFromHardware/WriteToHardware.
I'm not quite sure why the float paired stores were written how they were,
but it should be more consistent now.
Also get rid of the use of a psTemp global that wasn't really needed.
Add some comments.
This change matches the behaviour of OpenGL.
This should make Ty the Tasmanian Tiger 3 stretch across the whole
screen. There are other games with this same issue but I have not any.
See issue #6750 for details
Previously it was packed into spare slots in clippos.xy and normal.w,
but it's ugly and more importantly it's causing bugs.
This was discovered during the debugging of a zfreeze branch, which
expected clippos.xy to be xy position coordinates in clipspace (as
the name suggested).
Turns out the stereoscopy shader had also run into this trap, modifying
clippos.x (introducing errors with per-pixel lighting).
This commit has been moved outside of the zfreeze PR for fast merging.
When we try to JIT from a block which doesn't exist, don't JIT any code;
just update the PPC state to indicate an ISI. This is a little simpler,
and avoids abusing the JIT block cache.
