Outstanding questions

Figure out direct jumps (grep USE_DIRECT_JUMP)

Begin each block with a snippet that increments the cycle counter by
the number of instructions in the block (should work even with direct
block chaining, unless direct jumps can occur to the middle of a basic
block). Do something magical to make rdtsc work (figure out the
instruction offset and add/subtract it from the cycle
counter?). Figure out if it's possible to reliably put at the end of
the block instead. Can blocks ever be interrupted mid-way? Is the
vmtimer ever read during execution of a TB (meaning it would not have
its intermediate value)? Is it actually okay if it just jumps up on
each TB?

Is randomization used anywhere meaningful?

How do jumps into the middle of blocks work?

In gen_jmp_tb, why are there all of the things after gen_op_goto_tbx?




                          Answered questions

                                 ===

rt_clock doesn't show up anywhere.  Where are the RTC readings coming
from?

pc.c:cmos_init calls rtc_set_date with the host time.  Thereafter, the
RTC updates itself from timers fired off vm_clock