[pixel shader]
uniform float2 a;

float4 main() : SV_TARGET
{
    int x = a.x;
    int y = a.y;
    return float4(x + y, x - y, x * y, x / y);
}

[test]
uniform 0 float4 5.0 16.0 0.0 0.0
draw quad
probe all rgba (21.0, -11.0, 80.0, 0.0)

[pixel shader]
uniform float2 a;

float4 main() : SV_TARGET
{
    int x = a.x;
    int y = a.y;
    return float4(x % y, +x, -x, y / x);
}

[test]
uniform 0 float4 5.0 16.0 0.0 0.0
todo draw quad
probe all rgba (5.0, 5.0, -5.0, 3.0)

[pixel shader]
uniform float4 a;

float4 main() : SV_TARGET
{
    return abs(int4(a));
}

[test]
uniform 0 float4 5.0 -7.0 0.0 -10.0
draw quad
probe all rgba (5.0, 7.0, 0.0, 10.0)