PIC SPI, how to tell when SSBUF is finished transmitting?

I'm working with a PIC with hardware SPI. In order to send the data through the SPI you just write to register SSPBUF. However, I've been looking through the data sheet and I can't find what tells you that the transfer is complete. Do you have to add a delay yourself (as I am doing now) or is there some variable I can check to see when it is done? I've read all through the datasheet, and tried different things, but nothing has worked except for the delay yet.

I don't have the datasheet handy but just check the buffer full flag bit.

16F88 in asm

16F819 in asm

dsPIC 30F4013 in C

And if your program is pressed for time you can use an interrupt.