frame_pointer              contains the register used as frame pointer
stack_pointer              contains the register used as stack pointer
self_pointer               contains the register used as self pointer


unusedregsint              set of Currently available integer registers
unusedregsfpu              set of Currently available fpu registers
unusedregsmm               set of Currently available mm registers

availabletempregsint       set of maximally available integer registers
availabletempregsfpu       set of maximally available fpu registers
availabletempregsmm        set of maximally available mm registers

countusableregsint         count of currently available integer registers
countusableregsfpu         count of currently available fpu registers
countusableregsmm          count of currently available mm registers

c_countusableregsint       count of max. available int registers (in the current procedure)
c_countusableregsfpu       count of max. available fpu registers (in the current procedure)
c_countusableregsmm        count of max. available mm registers (in the current procedure)

intregs                    all!! available integer register
fpuregs                    all!! available fpu register
mmregs                     all!! available multimedia register

Intel specific
--------------
unusedregssse
availabletempregssse
countusableregssse