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st/mesa: set result writemask based on ir type

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This prevents textureQueryLevels, which maps as LODQ, from ending up
with a xyzw writemask, which is illegal.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100061
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Ilia Mirkin 2017-03-04 13:52:48 -05:00
parent 09f16de7e6
commit dab88e9af7
1 changed files with 1 additions and 0 deletions
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src/mesa/state_tracker/st_glsl_to_tgsi.cpp
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@ -4166,6 +4166,7 @@ glsl_to_tgsi_visitor::visit(ir_texture *ir)
*/
result_src = get_temp(ir->type);
result_dst = st_dst_reg(result_src);
result_dst.writemask = (1 << ir->type->vector_elements) - 1;
switch (ir->op) {
case ir_tex: