freepascal.compiler/compiler/new

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
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unusedregssse
availabletempregssse
countusableregssse