Matt Turner <matts...@gmail.com> writes:
> instructions in affected programs: 2858 -> 2808 (-1.75%)
> helped: 12
> ---
> src/glsl/nir/nir_opt_algebraic.py | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/src/glsl/nir/nir_opt_algebraic.py
> b/src/glsl/nir/nir_opt_algebraic.py
> index 6730408..34a401a 100644
> --- a/src/glsl/nir/nir_opt_algebraic.py
> +++ b/src/glsl/nir/nir_opt_algebraic.py
> @@ -149,6 +149,14 @@ optimizations = [
> (('flog', ('frsq', a)), ('fmul', -0.5, ('flog', a))),
> (('flog2', ('fpow', a, b)), ('fmul', b, ('flog2', a))),
> (('flog', ('fpow', a, b)), ('fmul', b, ('flog', a))),
> + (('fadd', ('flog2', a), ('flog2', b)), ('flog2', ('fmul', a, b))),
> + (('fadd', ('flog', a), ('flog', b)), ('flog', ('fmul', a, b))),
> + (('fadd', ('flog2', a), ('fneg', ('flog2', b))), ('flog2', ('fdiv', a,
> b))),
> + (('fadd', ('flog', a), ('fneg', ('flog', b))), ('flog', ('fdiv', a, b))),
> + (('fmul', ('fexp2', a), ('fexp2', a)), ('fmul', 2.0, ('fexp2', a))),
> + (('fmul', ('fexp', a), ('fexp', a)), ('fmul', 2.0, ('fexp', a))),
e^a * e^a -> 2 * e^a? This doesn't seem right. And something specific
to this doesn't seem particularly better than the general case below.
> + (('fmul', ('fexp2', a), ('fexp2', b)), ('fexp2', ('fadd', a, b))),
> + (('fmul', ('fexp', a), ('fexp', b)), ('fexp', ('fadd', a, b))),
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