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Intel Pentium Instruction Set Reference

CMC - Complement Carry Flag

Code Mnemonic Description
F5 CMC Complement CF flag


Complements the CF flag in the EFLAGS register.

Operands Bytes Clocks
  1 2 NP


ID unaffected DF unaffected
VIP unaffected IF unaffected
VIF unaffected TF unaffected
AC unaffected SF unaffected
VM unaffected ZF unaffected
RF unaffected AF unaffected
NT unaffected PF unaffected
IOPL unaffected CF contains the complement of its original value
OF unaffected