Re: [Qemu-devel] [PATCH 5/9] target-cris: sync CC state at load/stores.

["Edgar E. Iglesias" <edgar.iglesias@gmail.com>]

On Mon, Sep 05, 2016 at 12:02:14PM -0700, Richard Henderson wrote:
> On 09/05/2016 04:54 AM, Rabin Vincent wrote:
> >From: "Edgar E. Iglesias" <edgar@axis.com>
> >
> >Icount may choose to abort and recompile a TB at any load/store.  We
> >need to sync the CC state at these insns.
> >
> >Signed-off-by: Edgar E. Iglesias <edgar@axis.com>
> >Signed-off-by: Rabin Vincent <rabinv@axis.com>
> >---
> > target-cris/translate.c     | 9 +++++++++
> > target-cris/translate_v10.c | 3 +++
> > 2 files changed, 12 insertions(+)
> >
> >diff --git a/target-cris/translate.c b/target-cris/translate.c
> >index f4a8d7d..c280e24 100644
> >--- a/target-cris/translate.c
> >+++ b/target-cris/translate.c
> >@@ -1098,6 +1098,9 @@ static void gen_load64(DisasContext *dc, TCGv_i64 dst, TCGv addr)
> > {
> >     int mem_index = cpu_mmu_index(&dc->cpu->env, false);
> >
> >+    /* Due to icount, we need to update the CC flags on load/stores.  */
> >+    cris_evaluate_flags(dc);
> >+
> 
> This is not the proper way to handle this.  You should arrange to sync the
> CC flags in restore_state_to_opc.  There are plenty of examples in the tree
> you can examine.  It looks like there's plenty of room for cleanup for cris
> here.
>

Thanks, agreed.

Rabin, most of the CRIS patches that I left in the AXIS tree without upstreaming
need more work. I don't mind you posting them but keep in mind that there's
not much that can go up without tidy up.

Best regards,
Edgar