In the AdvSIMD scalar x indexed element and vector x indexed element
encoding group, the SDOT and UDOT instructions are vector only,
and their opcode is unallocated in the scalar group. Correctly
UNDEF this unallocated encoding.

Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/translate-a64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 474d9bfb5f0..30bc2412fc0 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -12641,7 +12641,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
         break;
     case 0x0e: /* SDOT */
     case 0x1e: /* UDOT */
-        if (size != MO_32 || !dc_isar_feature(aa64_dp, s)) {
+        if (is_scalar || size != MO_32 || !dc_isar_feature(aa64_dp, s)) {
             unallocated_encoding(s);
             return;
         }
-- 
2.20.1

On Fri, Jan 25, 2019 at 7:26 PM Peter Maydell <peter.maydell@linaro.org> wrote:
>
> In the AdvSIMD scalar x indexed element and vector x indexed element
> encoding group, the SDOT and UDOT instructions are vector only,
> and their opcode is unallocated in the scalar group. Correctly
> UNDEF this unallocated encoding.
>
> Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com>

Thanks,

Laurent

> ---
>  target/arm/translate-a64.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
> index 474d9bfb5f0..30bc2412fc0 100644
> --- a/target/arm/translate-a64.c
> +++ b/target/arm/translate-a64.c
> @@ -12641,7 +12641,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
>          break;
>      case 0x0e: /* SDOT */
>      case 0x1e: /* UDOT */
> -        if (size != MO_32 || !dc_isar_feature(aa64_dp, s)) {
> +        if (is_scalar || size != MO_32 || !dc_isar_feature(aa64_dp, s)) {
>              unallocated_encoding(s);
>              return;
>          }
> --
> 2.20.1
>