Kenneth Graunke <kenn...@whitecape.org> writes:
> On Haswell (GL 3.3):
>
> total instructions in shared programs: 6208759 -> 6203860 (-0.08%)
> instructions in affected programs: 856541 -> 851642 (-0.57%)
> helped: 3157
> HURT: 113
> LOST: 7
> GAINED: 15
>
> On Broadwell (GL 4.4):
>
> total instructions in shared programs: 11637854 -> 11632016 (-0.05%)
> instructions in affected programs: 1055693 -> 1049855 (-0.55%)
> helped: 3900
> HURT: 176
> LOST: 1
> GAINED: 18
>
> Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
> ---
> src/compiler/nir/nir_opt_algebraic.py | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/src/compiler/nir/nir_opt_algebraic.py
> b/src/compiler/nir/nir_opt_algebraic.py
> index 1cf614c..4e9896f 100644
> --- a/src/compiler/nir/nir_opt_algebraic.py
> +++ b/src/compiler/nir/nir_opt_algebraic.py
> @@ -251,6 +251,10 @@ optimizations = [
> (('ieq', 'a@bool', False), ('inot', 'a')),
> (('bcsel', a, True, False), ('ine', a, 0)),
> (('bcsel', a, False, True), ('ieq', a, 0)),
> + (('bcsel@32', a, 1.0, 0.0), ('b2f', ('ine', a, 0))),
> + (('bcsel@32', a, 0.0, 1.0), ('b2f', ('ieq', a, 0))),
> + (('bcsel@32', a, -1.0, -0.0), ('fneg', ('b2f', ('ine', a, 0)))),
> + (('bcsel@32', a, -0.0, -1.0), ('fneg', ('b2f', ('ieq', a, 0)))),Isn't bcsel's first arg guaranteed to be 0 or ~0? I thought that was how nir's bcsel (and b2f) worked. If not, it would be good to see this documented.
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