<Tr> <Td> 32 - 63 </Td> <Td> 0xFFFF FFFF...... 0000 0000 </Td> <Td> </Td> <Td> Reserved </Td> <Td> </Td> </Tr> <P> Note: The mask column in the table is the AND bitmask (as hexadecimal value) to query the flag (s) within FLAGS register value . </P> <P> The POPF, POPFD, and POPFQ instructions read from the stack, the first 16, 32, and 64 bits of the flags register, respectively . POPFD was introduced with the i386 architecture and POPFQ with the x64 architecture . In 64 - bit mode, PUSHF / POPF and PUSHFQ / POPFQ are available but not PUSHFD / POPFD . </P> <P> The following assembly code changes the direction flag (DF): </P>

How many flag registers are there in 8051