Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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PUSHF/POPF Instructions
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  Title:    Push or Pop Flags                     Flags: O D I T S Z A P C
                                                         ═════════════════
  Syntax:   PUSHF                                        ± ± ± ± ± ± ± ± ±
            PUSHFD
            POPF
            POPFD
 
  See also: PUSH, POP, LAHF
 
  Description:
 
     PUSHF pushes the flags register onto the stack. POPF pops the
     value on the top of the stack into the flags register.
 
     PUSHF and POPF always work on the 16-bit flags register. PUSHFD
     and POPFD work on the 32-bit flags register (80386/486 only).
                                    -♦-