0 Instructions are not trapped. This is the reset value if Advanced SIMD and floating-point are
implemented.
1 Instructions are trapped. This is always the value if Advanced SIMD and floating-point are
not implemented.
[9:0]
Reserved, RES1.
To access the CPTR_EL2:
MRS <Xt>, CPTR_EL2 ; Read CPTR_EL2 into Xt
MSR CPTR_EL2, <Xt> ; Write Xt to CPTR_EL2
B2 AArch64 system registers
B2.32 Architectural Feature Trap Register, EL2
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