Shutdown will enter the debugger or quit depending on the execution mode.
Quit is different from shutdown since it is triggered outside the guest by using the host Quit menu item.
Last use of grab_return was removed in f204caa9079aa94d90e1a8ef650b845283c1d46a.
grab_breakpoint was added in 2bd717e2931cba5be3152f92b3cca5e82e446759 but
never used.
There's no reason for it to be a global, we always set it and use it
in instruction implementations, and we never read it directly.
Perhaps the compiler could optimize this away, but it's better to be
simpler (and also be easier to read).
Mode 1 contains real addressing mode entries, which by definition cannot
be using segment registers. By skipping over them, we can shave off a
couple of seconds from the 10.2 boot time.
They happen surprisingly often, and flushing the TLB is expensive
because we need to walk over all entries.
Takes booting 10.2 on a Beige G3 from binary start to "Welcome to Macintosh"
from 58s to 38s on my machine.
Keeps track of instructions (including operands) that are executed,
to see if there are any hotspots that could be optimized or fastpaths
that should be added.
Also adds a mode where CPU profiler data is periodically output, to
make it easier to get at these instruction counts during startup.
cur_dma_rgn->end is the last byte of a region. It is not the byte after the region. Therefore, subtract 1 from size before doing compare.
Also add more detail to the abort messages.
None of the POWER opcodes uses it now, plus it is a duplicate of ppc_setsoov (though ppc_setsoov is inline so it would have to be moved to be able to use it in poweropcodes.cpp?
Use U instead of UL. U will use the smallest size that can fit all the unsigned bytes. Since 0xFFFFFFFF fits in 32 bits, the 0xFFFFFFFFU is a uint32_t.
