[v2 PATCH vkd3d 5/6] vkd3d-shader/hlsl: Parse the saturate() intrinsic.

[Matteo Bruni]

On Thu, Sep 16, 2021 at 8:56 PM Matteo Bruni <mbruni at codeweavers.com> wrote:
>
> From: Zebediah Figura <zfigura at codeweavers.com>
>
> Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
> Signed-off-by: Matteo Bruni <mbruni at codeweavers.com>
> ---
> v2 (Matteo): Fix trivial whitespace error.
>
>  Makefile.am                |  2 ++
>  libs/vkd3d-shader/hlsl.y   |  9 +++++++++
>  tests/saturate.shader_test | 10 ++++++++++
>  3 files changed, 21 insertions(+)
>  create mode 100644 tests/saturate.shader_test
>
> diff --git a/Makefile.am b/Makefile.am
> index 67dcbba4..45db1a16 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -87,6 +87,7 @@ vkd3d_shader_tests = \
>         tests/preproc-invalid.shader_test \
>         tests/preproc-macro.shader_test \
>         tests/preproc-misc.shader_test \
> +       tests/saturate.shader_test \
>         tests/swizzle-0.shader_test \
>         tests/swizzle-1.shader_test \
>         tests/swizzle-2.shader_test \
> @@ -295,6 +296,7 @@ XFAIL_TESTS = \
>         tests/hlsl-vector-indexing-uniform.shader_test \
>         tests/math.shader_test \
>         tests/max.shader_test \
> +       tests/saturate.shader_test \
>         tests/trigonometry.shader_test \
>         tests/writemask-assignop-1.shader_test
>  endif
> diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
> index 8f634728..fe3c3289 100644
> --- a/libs/vkd3d-shader/hlsl.y
> +++ b/libs/vkd3d-shader/hlsl.y
> @@ -1577,6 +1577,14 @@ static bool intrinsic_max(struct hlsl_ctx *ctx,
>      return !!add_expr(ctx, params->instrs, HLSL_OP2_MAX, args, &loc);
>  }
>
> +static bool intrinsic_saturate(struct hlsl_ctx *ctx,
> +        const struct parse_initializer *params, struct vkd3d_shader_location loc)
> +{
> +    struct hlsl_ir_node *args[3] = {params->args[0]};
> +
> +    return !!add_expr(ctx, params->instrs, HLSL_OP1_SAT, args, &loc);
> +}
> +
>  static const struct intrinsic_function
>  {
>      const char *name;
> @@ -1588,6 +1596,7 @@ intrinsic_functions[] =
>  {
>      {"clamp",                               3, true,  intrinsic_clamp},
>      {"max",                                 2, true,  intrinsic_max},
> +    {"saturate",                            1, true,  intrinsic_saturate},
>  };
>
>  static int intrinsic_function_name_compare(const void *a, const void *b)
> diff --git a/tests/saturate.shader_test b/tests/saturate.shader_test
> new file mode 100644
> index 00000000..0a954e7f
> --- /dev/null
> +++ b/tests/saturate.shader_test
> @@ -0,0 +1,10 @@
> +[pixel shader]
> +float4 main(uniform float2 u) : sv_target
> +{
> +    return float4(saturate(u), saturate(u.x + 0.5), saturate(-1.2));
> +}
> +
> +[test]
> +uniform 0 float4 0.7 -0.1 0.0 0.0
> +draw quad
> +probe all rgba (0.7, 0.0, 1.0, 0.0)
> --
> 2.26.3

I didn't mean to drop Giovanni's sign-off...