AVR-Chat

I'm using the spi functions in the avr32 framework, but since I can't  
get my code to load onto a real board yet I'm not able to look at the  
waveform and answer this for myself.  I hope someone who know this can  
help me out.

The spi_read and spi_write functions both take an unsigned short.   
That's two bytes.

Does this mean that two 16 clocks will go out with the resulting  
amount of data being written or read, or do they actually just clock  
out 8 clocks per call?

Thanks.