diff options
| author | Eric Anholt <[email protected]> | 2015-01-28 10:39:29 -0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2015-02-18 14:47:50 -0800 |
| commit | cb95a228e81a963d77f50058c7406db0ad3bccac (patch) | |
| tree | abfe7e9ac2679b79d8be1c528bf915a4f1d0c3e0 /src/glsl/nir | |
| parent | ccf14bca4b892a0dffa1d8c244bfabe384d70f98 (diff) | |
nir: Add a flag for lowering fsqrt(x) to frcp(frsqrt(x)).
vc4 cse/algebraic-disabled stats:
total uniforms in shared programs: 13972 -> 13966 (-0.04%)
uniforms in affected programs: 408 -> 402 (-1.47%)
total instructions in shared programs: 44973 -> 44911 (-0.14%)
instructions in affected programs: 1551 -> 1489 (-4.00%)
v2: Rebase to master (no TGSI->NIR present)
Reviewed-by: Kenneth Graunke <[email protected]> (v1)
Diffstat (limited to 'src/glsl/nir')
| -rw-r--r-- | src/glsl/nir/nir.h | 1 | ||||
| -rw-r--r-- | src/glsl/nir/nir_opt_algebraic.py | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h index bcc51e88ac8..37e15efa5cf 100644 --- a/src/glsl/nir/nir.h +++ b/src/glsl/nir/nir.h @@ -1328,6 +1328,7 @@ typedef struct nir_function { typedef struct nir_shader_compiler_options { bool lower_fpow; + bool lower_fsqrt; } nir_shader_compiler_options; typedef struct nir_shader { diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py index b8b28f1d6d1..f93757e0325 100644 --- a/src/glsl/nir/nir_opt_algebraic.py +++ b/src/glsl/nir/nir_opt_algebraic.py @@ -128,7 +128,8 @@ optimizations = [ (('fdiv', 1.0, a), ('frcp', a)), (('frcp', ('frcp', a)), a), (('frcp', ('fsqrt', a)), ('frsq', a)), - (('frcp', ('frsq', a)), ('fsqrt', a)), + (('fsqrt', a), ('frcp', ('frsq', a)), 'options->lower_fsqrt'), + (('frcp', ('frsq', a)), ('fsqrt', a), '!options->lower_fsqrt'), # Boolean simplifications (('ine', 'a@bool', 0), 'a'), (('ieq', 'a@bool', 0), ('inot', 'a')), |