Variable glsl_uint64Const
glsl_uint64: "\nstruct uint64_t {\n highp uvec2 value;\n};\nstruct uint64x2_t {\n highp uvec4 value;\n};\nuint64_t mixLinear(uint64_t x, uint64_t y, float a) {\n return x;\n}\nuint64_t toUint64(uint64_t x) { return x; }\n" = ...