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[Qemu-devel] [PATCH v2 0/3] target-m68k: add movem, BCD and CAS instruct

From: Laurent Vivier
Subject: [Qemu-devel] [PATCH v2 0/3] target-m68k: add movem, BCD and CAS instructions
Date: Wed, 2 Nov 2016 22:15:16 +0100

This series is another subset of the series I sent in May:

This subset contains reworked patches for:
- abcd/nbcd/sbcd: remove inline, delay write back to memory and
  use only 3 digits (and extract it from the bifield patch as
  it was squashed into it)
- movem: delay the update of the registers to the end of the load
  sequence to be able to restart the operation in case of page
  fault, and manage the 68020+ <-> 68000/68010 special case
- cas/cas2: rewrite according Richard's comments,
  and use cmpxchg() in cas.

I've checked it doesn't break coldfire support:
but it can't boot a 680x0 processor kernel.

- movem: don't use temp variable mask2
- bcd: delay register write back
       fix bcd_add() to add X
       define bcd_sub() instead of bsd_neg()
- cas2: make it atomic with "parallel_cpus" and
        cpu_loop_exit_atomic() (and 64bit cmpxchg()
        if possible)

Richard: This series doesn't use your "areg writeback" series,
but if you resend your series (with cmpm patches squashed
and the fix for writeback_mask), I will rebase this series
on top of yours.


Laurent Vivier (3):
  target-m68k: add abcd/sbcd/nbcd
  target-m68k: implement 680x0 movem
  target-m68k: add cas/cas2 ops

 target-m68k/helper.h    |   2 +
 target-m68k/op_helper.c | 133 +++++++++++++
 target-m68k/translate.c | 481 ++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 599 insertions(+), 17 deletions(-)


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