hw/i386.reference/CMC.htm

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   4 <TITLE>80386 Programmer's Reference Manual -- Opcode CMC</TITLE>
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   7 <B>up:</B> <A HREF="c17.htm">
   8 Chapter 17 -- 80386 Instruction Set</A><BR>
   9 <B>prev:</B><A HREF="CLTS.htm"> CLTS Clear Task-Switched Flag in CR0</A><BR>
  10 <B>next:</B><A HREF="CMP.htm"> CMP Compare Two Operands</A>
  11 <P>
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  13 <P>
  14 <H1>CMC -- Complement Carry Flag</H1>
  15
  16 <PRE>
  17 Opcode    Instruction    Clocks   Description
  18
  19 F5        CMC            2        Complement carry flag
  20 </PRE>
  21
  22
  23 <H2>Operation</H2>
  24
  25 <PRE>
  26 CF := NOT CF;
  27 </PRE>
  28
  29 <H2>Description</H2>
  30
  31 CMC reverses the setting of the carry flag. No other flags are affected.
  32
  33 <H2>Flags Affected</H2>
  34
  35 CF as described above
  36
  37 <H2>Protected Mode Exceptions</H2>
  38
  39 None
  40
  41 <H2>Real Address Mode Exceptions</H2>
  42
  43 None
  44
  45 <H2>Virtual 8086 Mode Exceptions</H2>
  46
  47 None
  48
  49
  50 <P>
  51 <HR>
  52 <P>
  53 <B>up:</B> <A HREF="c17.htm">
  54 Chapter 17 -- 80386 Instruction Set</A><BR>
  55 <B>prev:</B><A HREF="CLTS.htm"> CLTS Clear Task-Switched Flag in CR0</A><BR>
  56 <B>next:</B><A HREF="CMP.htm"> CMP Compare Two Operands</A>
  57 </BODY>