resources/sksl/workarounds/BuiltinFMASupport.sksl

/*#pragma settings NoBuiltinFMASupport*/

uniform half4 colorGreen, colorRed;
uniform float testArray[5];

half4 main(float2 coords) {
    float one = testArray[0];
    float two = testArray[1];
    float three = testArray[2];
    half four = half(testArray[3]);
    half five = half(testArray[4]);

    return (fma(one, two, three)         == (1 * 2 + 3)) &&
           (fma(half(three), four, five) == (3 * 4 + 5)) &&
           (fma(6, 7, 8)                 == (6 * 7 + 8)) ? colorGreen : colorRed;
}