diff options
Diffstat (limited to 'src/compiler/nir/nir_opt_algebraic.py')
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index d6737995844..b8d418c2e49 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -972,6 +972,18 @@ for op in ['fadd', 'fmul', 'iadd', 'imul']: ((op, ('bcsel(is_used_once)', a, '#b', c), '#d'), ('bcsel', a, (op, b, d), (op, c, d))) ] +# For derivatives in compute shaders, GLSL_NV_compute_shader_derivatives +# states: +# +# If neither layout qualifier is specified, derivatives in compute shaders +# return zero, which is consistent with the handling of built-in texture +# functions like texture() in GLSL 4.50 compute shaders. +for op in ['fddx', 'fddx_fine', 'fddx_coarse', + 'fddy', 'fddy_fine', 'fddy_coarse']: + optimizations += [ + ((op, 'a'), 0.0, 'info->stage == MESA_SHADER_COMPUTE && info->cs.derivative_group == DERIVATIVE_GROUP_NONE') +] + # This section contains "late" optimizations that should be run before # creating ffmas and calling regular optimizations for the final time. # Optimizations should go here if they help code generation and conflict |