1uniform half4 testInputs;  // equals (-1.25, 0, 0.75, 2.25)
2uniform half4 colorGreen, colorRed;
3
4half4 main(float2 coords) {
5    const half4 constVal = half4(-1.25, 0, 0.75, 2.25);
6    int4 expected = int4(-1, 0, 0, 1);
7    return (sign(int4(testInputs).x)    == expected.x &&
8            sign(int4(testInputs).xy)   == expected.xy &&
9            sign(int4(testInputs).xyz)  == expected.xyz &&
10            sign(int4(testInputs).xyzw) == expected.xyzw &&
11            sign(int4(constVal).x)      == expected.x &&
12            sign(int4(constVal).xy)     == expected.xy &&
13            sign(int4(constVal).xyz)    == expected.xyz &&
14            sign(int4(constVal).xyzw)   == expected.xyzw) ? colorGreen : colorRed;
15}
16