# INT32
# EFIAPI
# TestAndClearBit (
# IN INT32 Bit, // rcx
# IN volatile VOID* Address // rdx
# );
ASM_GLOBAL ASM_PFX(TestAndClearBit)
ASM_PFX(TestAndClearBit):
lock
btrl %ecx, (%rdx)
sbbl %eax, %eax
ret