[Mesa-dev] [PATCH 20/22] compiler/nir: add lowering for 16-bit flrp

[Jason Ekstrand]

Rb

On May 17, 2018 01:49:07 Iago Toral Quiroga <itoral at igalia.com> wrote:

> ---
> src/compiler/nir/nir.h                | 1 +
> src/compiler/nir/nir_opt_algebraic.py | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
> index 59c84bde268..7e4c78cc1b7 100644
> --- a/src/compiler/nir/nir.h
> +++ b/src/compiler/nir/nir.h
> @@ -1871,6 +1871,7 @@ typedef struct nir_shader_compiler_options {
>    bool lower_fdiv;
>    bool lower_ffma;
>    bool fuse_ffma;
> +   bool lower_flrp16;
>    bool lower_flrp32;
>    /** Lowers flrp when it does not support doubles */
>    bool lower_flrp64;
> diff --git a/src/compiler/nir/nir_opt_algebraic.py 
> b/src/compiler/nir/nir_opt_algebraic.py
> index 1033a42a06c..75e71efcc6b 100644
> --- a/src/compiler/nir/nir_opt_algebraic.py
> +++ b/src/compiler/nir/nir_opt_algebraic.py
> @@ -113,6 +113,7 @@ optimizations = [
>    (('~flrp', 0.0, a, b), ('fmul', a, b)),
>    (('~flrp', a, b, ('b2f', c)), ('bcsel', c, b, a), 'options->lower_flrp32'),
>    (('~flrp', a, 0.0, c), ('fadd', ('fmul', ('fneg', a), c), a)),
> +   (('flrp at 16', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 
> 'options->lower_flrp16'),
>    (('flrp at 32', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 
>    'options->lower_flrp32'),
>    (('flrp at 64', a, b, c), ('fadd', ('fmul', c, ('fsub', b, a)), a), 
>    'options->lower_flrp64'),
>    (('ffract', a), ('fsub', a, ('ffloor', a)), 'options->lower_ffract'),
> --
> 2.14.1
>
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