nir: Transform expressions of b2f(a) and b2f(b) to a ^^ b

All Gen platforms had pretty similar results. (Skylake shown)
total instructions in shared programs: 14276892 -> 14276886 (<.01%)
instructions in affected programs: 484 -> 478 (-1.24%)
helped: 2
HURT: 0

total cycles in shared programs: 532578397 -> 532578395 (<.01%)
cycles in affected programs: 3522 -> 3520 (-0.06%)
helped: 1
HURT: 0

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Thomas Helland <thomashelland90@gmail.com>

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 9ead2dd37d59b4e6d41e8708c11bc34d4ce51a15..c1ab9dd3c8379c050c81cc22bc1e13aeb8f15050 100644 (file)
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -173,6 +173,9 @@ optimizations = [
    (('fne', ('fmul', ('b2f', a), ('b2f', b)), 0.0), ('iand', a, b)),
    (('fne', ('fmin', ('b2f', a), ('b2f', b)), 0.0), ('iand', a, b)),
    (('fne', ('bcsel', a, ('b2f', b), 0.0)   , 0.0), ('iand', a, b)),
+   (('fne', ('fadd', ('b2f', a), ('fneg', ('b2f', b))), 0.0), ('ixor', a, b)),
+   (('fne',          ('b2f', a) ,          ('b2f', b) ),      ('ixor', a, b)),
+   (('fne', ('fneg', ('b2f', a)), ('fneg', ('b2f', b))),      ('ixor', a, b)),
    (('feq', ('fadd', ('b2f', a), ('b2f', b)), 0.0), ('inot', ('ior', a, b))),
    (('feq', ('fmax', ('b2f', a), ('b2f', b)), 0.0), ('inot', ('ior', a, b))),
    (('feq', ('bcsel', a, 1.0, ('b2f', b))   , 0.0), ('inot', ('ior', a, b))),