No shader-db changes, but does recognize some extract_u16 which enables
the next patch to optimize some code.
---
src/compiler/nir/nir_opt_algebraic.py | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/compiler/nir/nir_opt_algebraic.py
b/src/compiler/nir/nir_opt_algebraic.py
index dd26805..39be85f 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -163,6 +163,7 @@ optimizations = [
(('ushr', 0, a), 0),
(('ushr', a, 0), a),
(('iand', 0xff, ('ushr', a, 24)), ('ushr', a, 24)),
+ (('iand', 0xffff, ('ushr', a, 16)), ('ushr', a, 16)),
# Exponential/logarithmic identities
(('fexp2', ('flog2', a)), a), # 2^lg2(a) = a
(('flog2', ('fexp2', a)), a), # lg2(2^a) = a
@@ -220,6 +221,10 @@ optimizations = [
(('iand', 0xff, ('ushr', a, 8)), ('extract_u8', a, 1),
'!options->lower_extract_byte'),
(('iand', 0xff, a), ('extract_u8', a, 0), '!options->lower_extract_byte'),
+ # Word extraction
+ (('ushr', a, 16), ('extract_u16', a, 1), '!options->lower_extract_word'),
+ (('iand', 0xffff, a), ('extract_u16', a, 0),
'!options->lower_extract_word'),
+
# Subtracts
(('fsub', a, ('fsub', 0.0, b)), ('fadd', a, b)),
(('isub', a, ('isub', 0, b)), ('iadd', a, b)),
--
2.4.10
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