Re: [Qemu-devel] [PATCH fix for-2.9] target/ppc: fix cpu_ov setting for 32-bit

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Mar 13, 2017 at 03:01:04PM +0530, Nikunj A Dadhania wrote:
> A bug was introduced in following commit:
> 
>     dc0ad84 target/ppc: update overflow flags for add/sub
> 
> As for 32-bit ppc target extracting bit 63 for overflow is not correct.
> Made it dependent on TARGET_LOG_BITS. This had broken booting MacOS
> 9.2.1 image
> 
> Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>

Applied to ppc-for-2.9, thanks.

> ---
>  target/ppc/translate.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/target/ppc/translate.c b/target/ppc/translate.c
> index b6abc60..f40b5a1 100644
> --- a/target/ppc/translate.c
> +++ b/target/ppc/translate.c
> @@ -818,7 +818,7 @@ static inline void gen_op_arith_compute_ov(DisasContext *ctx, TCGv arg0,
>          if (is_isa300(ctx)) {
>              tcg_gen_extract_tl(cpu_ov32, cpu_ov, 31, 1);
>          }
> -        tcg_gen_extract_tl(cpu_ov, cpu_ov, 63, 1);
> +        tcg_gen_extract_tl(cpu_ov, cpu_ov, TARGET_LONG_BITS - 1, 1);
>      }
>      tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
>  }

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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