[pixel shader]
float4 main(uniform float4 u) : sv_target
{
    return trunc(u);
}

[test]
uniform 0 float4 -0.5 6.5 7.5 3.4
draw quad
probe all rgba (0.0, 6.0, 7.0, 3.0)
uniform 0 float4 -1.5 6.5 7.5 3.4
draw quad
probe all rgba (-1.0, 6.0, 7.0, 3.0)

[pixel shader]
float4 main(uniform float4 u) : sv_target
{
    float a = trunc(u.r);
    int2 b = trunc(u.gb);
    float4 res = float4(b, a, u.a);
    return trunc(res);
}

[test]
uniform 0 float4 -0.5 6.5 7.5 3.4
draw quad
probe all rgba (6.0, 7.0, 0.0, 3.0)

[require]
shader model >= 4.0

[pixel shader]
float4 main(uniform int4 u) : sv_target
{
    float a = trunc(u.r);
    int2 b = trunc(u.gb);
    float4 res = float4(b, a, u.a);
    return trunc(res);
}

[test]
uniform 0 int4 -1 6 7 3
draw quad
probe all rgba (6.0, 7.0, -1.0, 3.0)