Index

XAFLAG

Convert floating-point condition flags from external format to Arm format. This instruction converts the state of the PSTATE.{N,Z,C,V} flags from an alternative representation required by some software to a form representing the result of an Arm floating-point scalar compare instruction.

System
(FEAT_FlagM2)

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 1 1 1 1 1 1
CRm

XAFLAG

if !IsFeatureImplemented(FEAT_FlagM2) then UNDEFINED;

Operation

bit n = NOT(PSTATE.C) AND NOT(PSTATE.Z);
bit z = PSTATE.Z AND PSTATE.C;
bit c = PSTATE.C OR PSTATE.Z;
bit v = NOT(PSTATE.C) AND PSTATE.Z;

PSTATE.N = n;
PSTATE.Z = z;
PSTATE.C = c;
PSTATE.V = v;