tcg-hppa improvements

These are all follow-ups to Aurelien's review of my finish-the-port post of last week.

I've been able to do some testing of system mode now. Both arm-test and sparc-test seem to have some problem entering user-mode. This is suggesive of the problem Aurelien described wrt re-translation, but as far as I can tell I've fixed that bit. Nevertheless, this patch sequence is a strict improvement, since we wouldn't get even that far before this patch sequence.

I'm going to try to get SDL et al installed on the machine next, so I can try some graphics-mode emulations, like DOS... however horrible trans-atlantic X sessions tend to be...

r~

Richard Henderson (6):
tcg-hppa: Constrain immediate inputs to and_i32, or_i32, andc_i32.
tcg-hppa: Fix GUEST_BASE initialization in prologue.
tcg-hppa: Fix softmmu loads and stores.
tcg-hppa: Schedule the address masking after the TLB load.
tcg-hppa: Fix branch offset during retranslation.
tcg-hppa: Remove automatically implemented opcodes.

 tcg/hppa/tcg-target.c |  437 ++++++++++++++++++++++++-------------------------
 tcg/hppa/tcg-target.h |   10 +-
 2 files changed, 217 insertions(+), 230 deletions(-)