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spirv: handle gl_SampleMask

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SPIR-V maps both gl_SampleMask and gl_SampleMaskIn to the same
builtin (SampleMask). The only way to tell which one we are dealing with
is to check if it is an input or an output.

Fixes:
dEQP-VK.pipeline.multisample_shader_builtin.sample_mask.write.*

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
This commit is contained in:
Iago Toral Quiroga 2017-01-24 11:49:40 +01:00
parent 9467d78d38
commit 56495080ed
1 changed files with 6 additions and 2 deletions
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8
src/compiler/spirv/vtn_variables.c
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@ -975,8 +975,12 @@ vtn_get_builtin_location(struct vtn_builder *b,
set_mode_system_value(mode);
break;
case SpvBuiltInSampleMask:
*location = SYSTEM_VALUE_SAMPLE_MASK_IN; /* XXX out? */
set_mode_system_value(mode);
if (*mode == nir_var_shader_out) {
*location = FRAG_RESULT_SAMPLE_MASK;
} else {
*location = SYSTEM_VALUE_SAMPLE_MASK_IN;
set_mode_system_value(mode);
}
break;
case SpvBuiltInFragDepth:
*location = FRAG_RESULT_DEPTH;