zink: Output PackHalf2x16 to uint not float
Fixes InconsistentSpirv validation errors reporting that PackHalf2x16
outputs uint
rather than float
.
For example the previous code generates the following SPIR-V with
PackHalf2x16
output as a float:
%2018 = OpExtInst %float %1 PackHalf2x16 %2017
%2019 = OpBitcast %uint %2018
The new code generates:
%2018 = OpExtInst %uint %1 PackHalf2x16 %2017
Didn't cause any obvious problems but was distracting when trying to track down unrelated problems.
Tested on Windows 10 w/ Nvidia RTX 2070 SUPER, driver 496.49 running Superposition and the Mesa test suite.
Thanks, Charles