On Mon, 2016-01-25 at 15:18 -0800, Matt Turner wrote:
> ---
> src/glsl/nir/nir.h | 4 ++++
> src/glsl/nir/nir_opt_algebraic.py | 28 ++++++++++++++++++++++++++++
> 2 files changed, 32 insertions(+)
>
> diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
> index bbd5b1a..3b90b51 100644
> --- a/src/glsl/nir/nir.h
> +++ b/src/glsl/nir/nir.h
> @@ -1474,6 +1474,10 @@ typedef struct nir_shader_compiler_options {
> bool lower_pack_unorm_4x8;
> bool lower_pack_snorm_4x8;
> bool lower_unpack_half_2x16;
> + bool lower_unpack_unorm_2x16;
> + bool lower_unpack_snorm_2x16;
> + bool lower_unpack_unorm_4x8;
> + bool lower_unpack_snorm_4x8;
>
> bool lower_extract_byte;
> bool lower_extract_word;
> diff --git a/src/glsl/nir/nir_opt_algebraic.py
> b/src/glsl/nir/nir_opt_algebraic.py
> index 56b0f5e..a0d6c07 100644
> --- a/src/glsl/nir/nir_opt_algebraic.py
> +++ b/src/glsl/nir/nir_opt_algebraic.py
> @@ -278,6 +278,34 @@ optimizations = [
> ('pack_uvec4_to_uint',
> ('f2i', ('fround_even', ('fmul', ('fmin', 1.0, ('fmax', -1.0, 'v')),
> 127.0)))),
> 'options->lower_pack_snorm_4x8'),
> +
> + (('unpack_unorm_2x16', 'v'),
> + ('fdiv', ('u2f', ('vec4', ('extract_uword', 'v', 0),
> + ('extract_uword', 'v', 1), 0, 0)),
> + 65535.0),
> + 'options->lower_unpack_unorm_2x16'),
This should return a vec2 not a vec4, right?
> + (('unpack_unorm_4x8', 'v'),
> + ('fdiv', ('u2f', ('vec4', ('extract_ubyte', 'v', 0),
> + ('extract_ubyte', 'v', 1),
> + ('extract_ubyte', 'v', 2),
> + ('extract_ubyte', 'v', 3))),
> + 255.0),
> + 'options->lower_unpack_unorm_4x8'),
> +
> + (('unpack_snorm_2x16', 'v'),
> + ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec4',
> ('extract_iword', 'v', 0),
> +
> ('extract_iword', 'v', 1), 0, 0)),
> + 32767.0))),
> + 'options->lower_unpack_snorm_2x16'),
Same comment here.
> + (('unpack_snorm_4x8', 'v'),
> + ('fmin', 1.0, ('fmax', -1.0, ('fdiv', ('i2f', ('vec4',
> ('extract_ibyte', 'v', 0),
> +
> ('extract_ibyte', 'v', 1),
> +
> ('extract_ibyte', 'v', 2),
> +
> ('extract_ibyte', 'v', 3))),
> + 127.0))),
> + 'options->lower_unpack_snorm_4x8'),
> ]
>
> # Add optimizations to handle the case where the result of a ternary is
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