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author | Neil Roberts <[email protected]> | 2018-05-09 15:14:36 +0200 |
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committer | Alejandro Piñeiro <[email protected]> | 2018-07-10 11:43:40 +0200 |
commit | 45106a1c931d86060df72bcd296b4a1d33fda9bb (patch) | |
tree | 565fe01eb25b7bd7da9259d4795778588e97ea6d /autogen.sh | |
parent | 18c086a9e641c1808be0416468c1d11913a3675c (diff) |
spirv: Fix InterpolateAt* instructions for vecs with dynamic index
If the glsl is something like this:
in vec4 some_input;
interpolateAtCentroid(some_input[idx])
then it now gets generated as if it were:
interpolateAtCentroid(some_input)[idx]
This is necessary because the index will get generated as a series of
nir_bcsel instructions so it would no longer be an input variable. It
is similar to what is done for GLSL in ca63a5ed3e9efb2bd645b42.
Although I can’t find anything explicit in the Vulkan specs to say
this should be allowed, the SPIR-V spec just says “the operand
interpolant must be a pointer to the Input Storage Class”, which I
guess doesn’t rule out any type of pointer to an input.
This was found using the spec/glsl-4.40/execution/fs-interpolateAt*
Piglit tests with the ARB_gl_spirv branch.
Signed-off-by: Neil Roberts <[email protected]>
Signed-off-by: Alejandro Piñeiro <[email protected]>
v2: update after nir_deref_instr land on master. Implemented by
Alejandro Piñeiro. Special thanks to Jason Ekstrand for guidance
at the new nir_deref_instr world.
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'autogen.sh')
0 files changed, 0 insertions, 0 deletions