Declaring a variable as a Double in CCES for ADSP-21489

Hello, 

I have a simple question and looking for a simple answer.

I am developing a floating point audio processing platform in CCES to be implemented on ADSP_21489.

I would like to know what word length is stored when declaring a variable as a double on a 32-bit dsp? See example of "out" variable declared below:

    // Process at single precision 
    float out;
    // Process at double precision? 
    double out;

Does it store it as:

- 1 x 32-bit float?

- 2 x 32-bit float?

- 1 x 40-bit float?

- Or none of the above

Thanks,

Calum