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nir: do not pack varying with different types 

The current algorithm only supports packing 32-bit types.
If a shader uses both 16-bit and 32-bit varyings, we shouldn't
compact them together.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Samuel Pitoiset 2019-04-05 11:26:12 +02:00
parent 0dff1533f2
commit 5eb17506e1
1 changed files with 13 additions and 0 deletions
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13
src/compiler/nir/nir_linking_helpers.c
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@ -243,6 +243,7 @@ struct assigned_comps
uint8_t comps;
uint8_t interp_type;
uint8_t interp_loc;
bool is_32bit;
};
/* Packing arrays and dual slot varyings is difficult so to avoid complex
@ -308,6 +309,7 @@ get_unmoveable_components_masks(struct exec_list *var_list,
comps[location + i].interp_type =
get_interp_type(var, type, default_to_smooth_interp);
comps[location + i].interp_loc = get_interp_loc(var);
comps[location + i].is_32bit = glsl_type_is_32bit(type);
}
}
}
@ -423,6 +425,7 @@ struct varying_component {
nir_variable *var;
uint8_t interp_type;
uint8_t interp_loc;
bool is_32bit;
bool is_patch;
bool initialised;
};
@ -539,6 +542,7 @@ gather_varying_component_info(nir_shader *consumer,
vc_info->interp_type =
get_interp_type(in_var, type, default_to_smooth_interp);
vc_info->interp_loc = get_interp_loc(in_var);
vc_info->is_32bit = glsl_type_is_32bit(type);
vc_info->is_patch = in_var->data.patch;
}
}
@ -572,6 +576,14 @@ assign_remap_locations(struct varying_loc (*remap)[4],
continue;
}
/* We can only pack varyings with matching types, and the current
* algorithm only supports packing 32-bit.
*/
if (!assigned_comps[tmp_cursor].is_32bit) {
tmp_comp = 0;
continue;
}
while (tmp_comp < 4 &&
(assigned_comps[tmp_cursor].comps & (1 << tmp_comp))) {
tmp_comp++;
@ -589,6 +601,7 @@ assign_remap_locations(struct varying_loc (*remap)[4],
assigned_comps[tmp_cursor].comps |= (1 << tmp_comp);
assigned_comps[tmp_cursor].interp_type = info->interp_type;
assigned_comps[tmp_cursor].interp_loc = info->interp_loc;
assigned_comps[tmp_cursor].is_32bit = info->is_32bit;
/* Assign remap location */
remap[location][info->var->data.location_frac].component = tmp_comp++;