RWByteAddressBuffer _15 : register(u0);
ByteAddressBuffer _20 : register(t1);

// Returns the inverse of a matrix, by using the algorithm of calculating the classical
// adjoint and dividing by the determinant. The contents of the matrix are changed.
float2x2 SPIRV_Cross_Inverse(float2x2 m)
{
    float2x2 adj;	// The adjoint matrix (inverse after dividing by determinant)

    // Create the transpose of the cofactors, as the classical adjoint of the matrix.
    adj[0][0] =  m[1][1];
    adj[0][1] = -m[0][1];

    adj[1][0] = -m[1][0];
    adj[1][1] =  m[0][0];

    // Calculate the determinant as a combination of the cofactors of the first row.
    float det = (adj[0][0] * m[0][0]) + (adj[0][1] * m[1][0]);

    // Divide the classical adjoint matrix by the determinant.
    // If determinant is zero, matrix is not invertable, so leave it unchanged.
    return (det != 0.0f) ? (adj * (1.0f / det)) : m;
}

// Returns the determinant of a 2x2 matrix.
float SPIRV_Cross_Det2x2(float a1, float a2, float b1, float b2)
{
    return a1 * b2 - b1 * a2;
}

// Returns the inverse of a matrix, by using the algorithm of calculating the classical
// adjoint and dividing by the determinant. The contents of the matrix are changed.
float3x3 SPIRV_Cross_Inverse(float3x3 m)
{
    float3x3 adj;	// The adjoint matrix (inverse after dividing by determinant)

    // Create the transpose of the cofactors, as the classical adjoint of the matrix.
    adj[0][0] =  SPIRV_Cross_Det2x2(m[1][1], m[1][2], m[2][1], m[2][2]);
    adj[0][1] = -SPIRV_Cross_Det2x2(m[0][1], m[0][2], m[2][1], m[2][2]);
    adj[0][2] =  SPIRV_Cross_Det2x2(m[0][1], m[0][2], m[1][1], m[1][2]);

    adj[1][0] = -SPIRV_Cross_Det2x2(m[1][0], m[1][2], m[2][0], m[2][2]);
    adj[1][1] =  SPIRV_Cross_Det2x2(m[0][0], m[0][2], m[2][0], m[2][2]);
    adj[1][2] = -SPIRV_Cross_Det2x2(m[0][0], m[0][2], m[1][0], m[1][2]);

    adj[2][0] =  SPIRV_Cross_Det2x2(m[1][0], m[1][1], m[2][0], m[2][1]);
    adj[2][1] = -SPIRV_Cross_Det2x2(m[0][0], m[0][1], m[2][0], m[2][1]);
    adj[2][2] =  SPIRV_Cross_Det2x2(m[0][0], m[0][1], m[1][0], m[1][1]);

    // Calculate the determinant as a combination of the cofactors of the first row.
    float det = (adj[0][0] * m[0][0]) + (adj[0][1] * m[1][0]) + (adj[0][2] * m[2][0]);

    // Divide the classical adjoint matrix by the determinant.
    // If determinant is zero, matrix is not invertable, so leave it unchanged.
    return (det != 0.0f) ? (adj * (1.0f / det)) : m;
}

// Returns the determinant of a 3x3 matrix.
float SPIRV_Cross_Det3x3(float a1, float a2, float a3, float b1, float b2, float b3, float c1, float c2, float c3)
{
    return a1 * SPIRV_Cross_Det2x2(b2, b3, c2, c3) - b1 * SPIRV_Cross_Det2x2(a2, a3, c2, c3) + c1 * SPIRV_Cross_Det2x2(a2, a3, b2, b3);
}

// Returns the inverse of a matrix, by using the algorithm of calculating the classical
// adjoint and dividing by the determinant. The contents of the matrix are changed.
float4x4 SPIRV_Cross_Inverse(float4x4 m)
{
    float4x4 adj;	// The adjoint matrix (inverse after dividing by determinant)

    // Create the transpose of the cofactors, as the classical adjoint of the matrix.
    adj[0][0] =  SPIRV_Cross_Det3x3(m[1][1], m[1][2], m[1][3], m[2][1], m[2][2], m[2][3], m[3][1], m[3][2], m[3][3]);
    adj[0][1] = -SPIRV_Cross_Det3x3(m[0][1], m[0][2], m[0][3], m[2][1], m[2][2], m[2][3], m[3][1], m[3][2], m[3][3]);
    adj[0][2] =  SPIRV_Cross_Det3x3(m[0][1], m[0][2], m[0][3], m[1][1], m[1][2], m[1][3], m[3][1], m[3][2], m[3][3]);
    adj[0][3] = -SPIRV_Cross_Det3x3(m[0][1], m[0][2], m[0][3], m[1][1], m[1][2], m[1][3], m[2][1], m[2][2], m[2][3]);

    adj[1][0] = -SPIRV_Cross_Det3x3(m[1][0], m[1][2], m[1][3], m[2][0], m[2][2], m[2][3], m[3][0], m[3][2], m[3][3]);
    adj[1][1] =  SPIRV_Cross_Det3x3(m[0][0], m[0][2], m[0][3], m[2][0], m[2][2], m[2][3], m[3][0], m[3][2], m[3][3]);
    adj[1][2] = -SPIRV_Cross_Det3x3(m[0][0], m[0][2], m[0][3], m[1][0], m[1][2], m[1][3], m[3][0], m[3][2], m[3][3]);
    adj[1][3] =  SPIRV_Cross_Det3x3(m[0][0], m[0][2], m[0][3], m[1][0], m[1][2], m[1][3], m[2][0], m[2][2], m[2][3]);

    adj[2][0] =  SPIRV_Cross_Det3x3(m[1][0], m[1][1], m[1][3], m[2][0], m[2][1], m[2][3], m[3][0], m[3][1], m[3][3]);
    adj[2][1] = -SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][3], m[2][0], m[2][1], m[2][3], m[3][0], m[3][1], m[3][3]);
    adj[2][2] =  SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][3], m[1][0], m[1][1], m[1][3], m[3][0], m[3][1], m[3][3]);
    adj[2][3] = -SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][3], m[1][0], m[1][1], m[1][3], m[2][0], m[2][1], m[2][3]);

    adj[3][0] = -SPIRV_Cross_Det3x3(m[1][0], m[1][1], m[1][2], m[2][0], m[2][1], m[2][2], m[3][0], m[3][1], m[3][2]);
    adj[3][1] =  SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][2], m[2][0], m[2][1], m[2][2], m[3][0], m[3][1], m[3][2]);
    adj[3][2] = -SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][2], m[1][0], m[1][1], m[1][2], m[3][0], m[3][1], m[3][2]);
    adj[3][3] =  SPIRV_Cross_Det3x3(m[0][0], m[0][1], m[0][2], m[1][0], m[1][1], m[1][2], m[2][0], m[2][1], m[2][2]);

    // Calculate the determinant as a combination of the cofactors of the first row.
    float det = (adj[0][0] * m[0][0]) + (adj[0][1] * m[1][0]) + (adj[0][2] * m[2][0]) + (adj[0][3] * m[3][0]);

    // Divide the classical adjoint matrix by the determinant.
    // If determinant is zero, matrix is not invertable, so leave it unchanged.
    return (det != 0.0f) ? (adj * (1.0f / det)) : m;
}

void comp_main()
{
    float2x2 _23 = asfloat(uint2x2(_20.Load2(0), _20.Load2(8)));
    float2x2 _24 = SPIRV_Cross_Inverse(_23);
    _15.Store2(0, asuint(_24[0]));
    _15.Store2(8, asuint(_24[1]));
    float3x3 _29 = asfloat(uint3x3(_20.Load3(16), _20.Load3(32), _20.Load3(48)));
    float3x3 _30 = SPIRV_Cross_Inverse(_29);
    _15.Store3(16, asuint(_30[0]));
    _15.Store3(32, asuint(_30[1]));
    _15.Store3(48, asuint(_30[2]));
    float4x4 _35 = asfloat(uint4x4(_20.Load4(64), _20.Load4(80), _20.Load4(96), _20.Load4(112)));
    float4x4 _36 = SPIRV_Cross_Inverse(_35);
    _15.Store4(64, asuint(_36[0]));
    _15.Store4(80, asuint(_36[1]));
    _15.Store4(96, asuint(_36[2]));
    _15.Store4(112, asuint(_36[3]));
}

[numthreads(1, 1, 1)]
void main()
{
    comp_main();
}
