On Mar 30, 2014 3:15 AM, "Chris Forbes" <<a href="mailto:chrisf@ijw.co.nz">chrisf@ijw.co.nz</a>> wrote: > > nVIDIA's compiler considers `signed` to be a reserved word and so > refuses to compile these shaders. Whether that's sensible or not, > we'd like to see any real failures in these tests instead. > I believe the nvidia compiler failing to conform to performing to spec. I double checked the glsl 1.50 specification for keywords ( section 3.6 ) and the keyword signed is not mentioned. However I did notice that unsigned is a reserved keyword, so the behavior nvidia has is sensible since most c-like languages reserve this keyword.