CFINV

Invert carry flag

This instruction inverts the value of the PSTATE.C flag.

Encoding: System

Variants: FEAT_FlagM (ARMv8.4)

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
1	1	0	1	0	1	0	1	0	0	0	0	0	0	0	0	0	1	0	0	(0)	(0)	(0)	(0)	0	0	0	1	1	1	1	1
													op1							CRm				op2			Rt

CFINV

Decoding algorithm

if !IsFeatureImplemented(FEAT_FlagM) then EndOfDecode(Decode_UNDEF);

Operation

PSTATE.C = NOT(PSTATE.C);

Explanations

Operational Notes

If PSTATE.DIT is 1:

• The execution time of this instruction is independent of:
  • The values of the data supplied in any of its registers.
  • The values of the NZCV flags.
• The response of this instruction to asynchronous exceptions does not vary based on:
  • The values of the data supplied in any of its registers.
  • The values of the NZCV flags.