PUSHF            Push Flags onto Stack               Flags: not altered

Logic:    SP   SP - 2
(SP)   flag-register

PUSHF decrements SP by 2, then transfers the flags register to the new
top of stack.

                                                                          
Operands                  Clocks   Transfers  Bytes   Example
no operands                 14         1        1     PUSHF
                                                                          

See also: POPF
See also: LAHF
See also: SAHF

PUSHF Push Flags onto Stack