uniform half4 colorGreen, colorRed; noinline bool checkIntrinsicAsFunctionArg(float3 f3, int3 e3) { // 6 equals 0.75 * 2^3. return (f3 == float3(0.75) && e3 == int3(3)); } half4 main(float2 coords) { float4 value = colorGreen.gggg * 6; int4 exp; float4 result; bool4 ok; // 6 equals 0.75 * 2^3. result.x = frexp(value.x, exp.x); ok.x = (result.x == 0.75 && exp.x == 3); result.xy = frexp(value.xy, exp.xy); ok.y = (result.y == 0.75 && exp.y == 3); result.xyz = frexp(value.xyz, exp.xyz); ok.z = (result.z == 0.75 && exp.z == 3); result.xyzw = frexp(value.xyzw, exp.xyzw); ok.w = (result.w == 0.75 && exp.w == 3); bool funcOk = checkIntrinsicAsFunctionArg(frexp(value.wzy, exp.zxw).yxz, exp.yxz); return all(ok) && funcOk ? colorGreen : colorRed; }