glsl-out: Perform casts in int only math functions #1978
Merged
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Some functions like abs only accept signed integers while naga's IR
accepts both signed and unsigned integers, this wasn't accounted for in
the glsl backend causing it to produce code that wouldn't type check.
This commit addresses it by performing casts from uint to int of the
function argument and then back from int to uint for the function
return.
closes #1968
Edit: found some problems that need to be fixed firstEdit2: Good to go now