Thought it was worth getting the real McCoy[tm] for the Intel register and other specifications.
http://software.intel.com/en-us/articles/intel-c-stm-compiler-prototype-edition-20/#ABI
Download this PDF file below.
Intel TM ABI 1_0_1 (425k PDF)
i dunno what it is, but that is one hell of a title - lol
After having a climb through it, the main reference at the end was Agner Fog's document which is for what its worth a better technical reference than the Intel copy.
mutter, this keyboard is driving me NUTZ. Fixed another typo.
you don't have to tell me about intel pdf's - lol
they look nice - but the content just isn't what it used to be
they tend to make a bag of worms out of it
The latest manuals are very good, I have just downloaded the full set recently to keep up with the SSE instructions and they have in fact got better. Shame the rest of their stuff is looking a bit flaky.