There was too much cut and paste between ldrexd and strexd,
as ldrexd does prohibit two output registers the same.

Fixes: af288228995
Reported-by: Michael Goffioul <michael.goffioul@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/translate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/arm/translate.c b/target/arm/translate.c
index 2ea9da7637..b285b23858 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -8934,7 +8934,7 @@ static bool op_strex(DisasContext *s, arg_STREX *a, MemOp mop, bool rel)
         || (s->thumb && (a->rd == 13 || a->rt == 13))
         || (mop == MO_64
             && (a->rt2 == 15
-                || a->rd == a->rt2 || a->rt == a->rt2
+                || a->rd == a->rt2
                 || (s->thumb && a->rt2 == 13)))) {
         unallocated_encoding(s);
         return true;
-- 
2.17.1

On Sun, 17 Nov 2019 at 09:06, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> There was too much cut and paste between ldrexd and strexd,
> as ldrexd does prohibit two output registers the same.
>
> Fixes: af288228995
> Reported-by: Michael Goffioul <michael.goffioul@gmail.com>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  target/arm/translate.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/arm/translate.c b/target/arm/translate.c
> index 2ea9da7637..b285b23858 100644
> --- a/target/arm/translate.c
> +++ b/target/arm/translate.c
> @@ -8934,7 +8934,7 @@ static bool op_strex(DisasContext *s, arg_STREX *a, MemOp mop, bool rel)
>          || (s->thumb && (a->rd == 13 || a->rt == 13))
>          || (mop == MO_64
>              && (a->rt2 == 15
> -                || a->rd == a->rt2 || a->rt == a->rt2
> +                || a->rd == a->rt2
>                  || (s->thumb && a->rt2 == 13)))) {
>          unallocated_encoding(s);
>          return true;
> --
> 2.17.1


Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM