[pixel shader]
uniform float4x4 m;

float4 main() : SV_TARGET
{
    return float4(m[0][0], m[1][0], m[1][2], m[2][3]);
}

[test]
uniform 0 float4 1.0 2.0 3.0 4.0
uniform 4 float4 5.0 6.0 7.0 8.0
uniform 8 float4 9.0 10.0 11.0 12.0
uniform 12 float4 13.0 14.0 15.0 16.0
draw quad
probe (0, 0) rgba (1.0, 2.0, 10.0, 15.0)

[pixel shader]
uniform column_major float4x4 m;

float4 main() : SV_TARGET
{
    return float4(m[0][0], m[1][0], m[1][2], m[2][3]);
}

[test]
uniform 0 float4 1.0 2.0 3.0 4.0
uniform 4 float4 5.0 6.0 7.0 8.0
uniform 8 float4 9.0 10.0 11.0 12.0
uniform 12 float4 13.0 14.0 15.0 16.0
draw quad
probe (0, 0) rgba (1.0, 2.0, 10.0, 15.0)

[pixel shader]
uniform row_major float4x4 m;

float4 main() : SV_TARGET
{
    return float4(m[0][0], m[1][0], m[1][2], m[2][3]);
}

[test]
uniform 0 float4 1.0 2.0 3.0 4.0
uniform 4 float4 5.0 6.0 7.0 8.0
uniform 8 float4 9.0 10.0 11.0 12.0
uniform 12 float4 13.0 14.0 15.0 16.0
draw quad
probe (0, 0) rgba (1.0, 5.0, 7.0, 12.0)

[pixel shader]
uniform float3x2 m;

float4 main() : SV_TARGET
{
    float3x2 m2 = m;
    return float4(m2[0][0], m2[2][0], m2[1][1], m2[2][1]);
}

[test]
uniform 0 float4 1.0 2.0 3.0 0.0
uniform 4 float4 5.0 6.0 7.0 0.0
draw quad
probe (0, 0) rgba (1.0, 3.0, 6.0, 7.0)

[pixel shader]
float4 main() : SV_TARGET
{
    float2x2 a = float2x2(11.0, 12.0, 13.0, 14.0);
    float4x4 m = float4x4(1.0, 2.0, 3.0, 4.0,
                          float3(5.0, 6.0, 7.0), 8.0,
                          9.0, 10.0,
                          a,
                          15.0, 16.0);
    return float4(m[0][0], m[1][0], m[1][2], m[2][3]);
}

[test]
draw quad
probe (0, 0) rgba (1.0, 5.0, 7.0, 12.0)


[pixel shader]
float4 main() : SV_TARGET
{
    float3x2 m = {1, 2, 3, 4, 5, 6};

    m[1] = float2(30, 40);

    return float4(m[1], m[2]);
}

[test]
draw quad
probe (0, 0) rgba (30.0, 40.0, 5.0, 6.0)


[pixel shader]
float4 main() : SV_TARGET
{
    row_major float3x2 m = {1, 2, 3, 4, 5, 6};

    m[2] = float2(50, 60);

    return float4(m[1], m[2]);
}

[test]
draw quad
probe (0, 0) rgba (3.0, 4.0, 50.0, 60.0)


[pixel shader]
uniform float i;

float4 main() : sv_target
{
    float4x4 mat = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};

    return mat[i];
}

[test]
uniform 0 float 2
draw quad
probe (0, 0) rgba (8, 9, 10, 11)


[pixel shader]
uniform float i;

float4 main() : sv_target
{
    row_major float4x4 mat = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};

    return mat[i];
}

[test]
uniform 0 float 3
todo(glsl) draw quad
probe (0, 0) rgba (12, 13, 14, 15)