[Mesa-dev] [PATCH] nir: Use a single bit for the dual-source blend index

[Tapani Pälli]

Reviewed-by: Tapani Pälli <tapani.palli at intel.com>

On 08/02/2015 08:04 AM, Timothy Arceri wrote:
> The only values allowed are 0 and 1, and the value is checked before
> assigning.
>
> This is a copy of 8eeca7a56c that seems to have been made to the glsl
> ir type after it was copied for use in nir but before nir landed.
> ---
>   src/glsl/nir/nir.h | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
> index 4551d09..d47f352 100644
> --- a/src/glsl/nir/nir.h
> +++ b/src/glsl/nir/nir.h
> @@ -293,9 +293,13 @@ typedef struct {
>         unsigned int driver_location;
>
>         /**
> -       * output index for dual source blending.
> +       * Output index for dual source blending.
> +       *
> +       * \note
> +       * The GLSL spec only allows the values 0 or 1 for the index in \b dual
> +       * source blending.
>          */
> -      int index;
> +      unsigned index:1;
>
>         /**
>          * Initial binding point for a sampler or UBO.
>