diff options
| author | Kenneth Graunke <[email protected]> | 2015-01-19 14:57:38 -0800 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2015-01-23 14:53:26 -0800 |
| commit | 3e56572c498bea3c41692c80c242883373dab42a (patch) | |
| tree | df1b4d5f32695785a5672c6d8fd0a16de2dedd0a /src/glsl/nir | |
| parent | 978b0a9cda925ee903028b92f6654e610608a5ba (diff) | |
nir: Add a bunch of algebraic optimizations on logic/bit operations.
Matt and I noticed a bunch of "val <- ior a a" operations in a shader,
so we decided to add an algebraic optimization for that. While there,
I decided to add a bunch more of them.
v2: Delete bogus fand/for optimizations (caught by Jason).
total NIR instructions in shared programs: 2023511 -> 2020814 (-0.13%)
NIR instructions in affected programs: 149634 -> 146937 (-1.80%)
helped: 1032
total i965 instructions in shared programs: 6035392 -> 6035397 (0.00%)
i965 instructions in affected programs: 537 -> 542 (0.93%)
HURT: 2
Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Diffstat (limited to 'src/glsl/nir')
| -rw-r--r-- | src/glsl/nir/nir_opt_algebraic.py | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py index 169bb41b709..53fe4a0804e 100644 --- a/src/glsl/nir/nir_opt_algebraic.py +++ b/src/glsl/nir/nir_opt_algebraic.py @@ -68,6 +68,19 @@ optimizations = [ (('fadd', ('fmul', a, b), c), ('ffma', a, b, c)), (('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)), (('fmin', ('fmax', a, 1.0), 0.0), ('fsat', a)), + # Logical and bit operations + (('fand', a, 0.0), 0.0), + (('iand', a, a), a), + (('iand', a, 0), 0), + (('ior', a, a), a), + (('ior', a, 0), a), + (('fxor', a, a), 0.0), + (('ixor', a, a), 0), + (('inot', ('inot', a)), a), + # DeMorgan's Laws + (('iand', ('inot', a), ('inot', b)), ('inot', ('ior', a, b))), + (('ior', ('inot', a), ('inot', b)), ('inot', ('iand', a, b))), + # This one may not be exact (('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))), ] |