EAX_EDX_RET        56 arch/x86/include/asm/msr.h #define EAX_EDX_RET(val, low, high)	"=a" (low), "=d" (high)
EAX_EDX_RET        60 arch/x86/include/asm/msr.h #define EAX_EDX_RET(val, low, high)	"=A" (val)