diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/glsl/nir/nir_opt_algebraic.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py index 40722de1ea5..42846e1202b 100644 --- a/src/glsl/nir/nir_opt_algebraic.py +++ b/src/glsl/nir/nir_opt_algebraic.py @@ -96,6 +96,16 @@ optimizations = [ (('ishr', a, 0), a), (('ushr', 0, a), 0), (('ushr', a, 0), 0), + # Exponential/logarithmic identities + (('fexp2', ('flog2', a)), a), # 2^lg2(a) = a + (('fexp', ('flog', a)), a), # e^ln(a) = a + (('flog2', ('fexp2', a)), a), # lg2(2^a) = a + (('flog', ('fexp', a)), a), # ln(e^a) = a + (('fexp2', ('fmul', ('flog2', a), b)), ('fpow', a, b)), # 2^(lg2(a)*b) = a^b + (('fexp', ('fmul', ('flog', a), b)), ('fpow', a, b)), # e^(ln(a)*b) = a^b + (('fpow', a, 1.0), a), + (('fpow', a, 2.0), ('fmul', a, a)), + (('fpow', 2.0, a), ('fexp2', a)), # This one may not be exact (('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))), |