resources/sksl/intrinsics/AbsFloat.sksl

uniform half4 testInputs;
uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    half4 expected = half4(1.25, 0, 0.75, 2.25);
    return (abs(testInputs.x)    == expected.x     &&
            abs(testInputs.xy)   == expected.xy    &&
            abs(testInputs.xyz)  == expected.xyz   &&
            abs(testInputs.xyzw) == expected.xyzw) ? colorGreen : colorRed;
}