It's fully cocked, and good to go after pulling back the slide 3/4". The "lug" (for a lack of a better term) engages the sear, the firing pin is fully cocked and ready to be released (except of course the safeties are still engaged.
The SA trigger performs one action, which has caused me a lot of confusion why they call the XD a "modified SA" pistol, which it does not seem to me that it is. The Trigger allows the sear to drop, releasing the firing pin, making a "bang" sound. It is true that there are several safeties that need to be disengaged before the sear can drop.. the USA trigger must be correctly depressed before the trigger can be pulled.. the Grip safety must be correctly depressed before it will physically allow the sear to drop... and the slide will not move back if the grip safety is not disengaged...
There is also the safety on the trigger rail that I don't really understand how that works.. I think this is commonly referred to as the drop safety...
Anyway.. the Glock, which is a DA pistol, works similarly, with the exception that that last part of the trigger pull completes the cocking action. Thus it is DA.
Correct me if I am wrong.