[Mesa-dev] [PATCH 19/26] nir: Add an opcode for stomping a 32-bit value to 16-bit precision

[Rob Clark]

On Fri, Mar 25, 2016 at 7:12 PM, Jason Ekstrand <jason at jlekstrand.net> wrote:
> This correlates directly to the SPIR-V opcode OpQuantizeToF16

Reviewed-by: Rob Clark <robdclark at gmail.com>

> ---
>  src/compiler/nir/nir_opcodes.py | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
> index 7c8a322..d6b658d 100644
> --- a/src/compiler/nir/nir_opcodes.py
> +++ b/src/compiler/nir/nir_opcodes.py
> @@ -180,6 +180,7 @@ unop("ffloor", tfloat, "bit_size == 64 ? floor(src0) : floorf(src0)")
>  unop("ffract", tfloat, "src0 - (bit_size == 64 ? floor(src0) : floorf(src0))")
>  unop("fround_even", tfloat, "bit_size == 64 ? _mesa_roundeven(src0) : _mesa_roundevenf(src0)")
>
> +unop("fquantize2f16", tfloat, "(fabs(src0) < ldexpf(1.0, -14)) ? copysignf(0.0f, src0) : _mesa_half_to_float(_mesa_float_to_half(src0))")
>
>  # Trigonometric operations.
>
> --
> 2.5.0.400.gff86faf
>
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