Re: [Qemu-devel] [PATCH v2 02/29] tcg: Do not recreate INDEX_op_neg_vec unless supported

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> Use tcg_can_emit_vec_op instead of just TCG_TARGET_HAS_neg_vec,
> so that we check the type and vece for the actual operation.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  tcg/optimize.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/tcg/optimize.c b/tcg/optimize.c
> index 5150c38a25..24faa06260 100644
> --- a/tcg/optimize.c
> +++ b/tcg/optimize.c
> @@ -734,9 +734,13 @@ void tcg_optimize(TCGContext *s)
>                  } else if (opc == INDEX_op_sub_i64) {
>                      neg_op = INDEX_op_neg_i64;
>                      have_neg = TCG_TARGET_HAS_neg_i64;
> -                } else {
> +                } else if (TCG_TARGET_HAS_neg_vec) {
> +                    TCGType type = TCGOP_VECL(op) + TCG_TYPE_V64;
> +                    unsigned vece = TCGOP_VECE(op);
>                      neg_op = INDEX_op_neg_vec;
> -                    have_neg = TCG_TARGET_HAS_neg_vec;
> +                    have_neg = tcg_can_emit_vec_op(neg_op, type, vece) > 0;
> +                } else {
> +                    break;
>                  }
>                  if (!have_neg) {
>                      break;


--
Alex Bennée