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> // APSR (Application Program Status Register Mask). It is the user level
> // alias for the CPSR. The APSR is a subset of the CPSR. Although
> // bits[15:0] are UNKNOWN on reads, it is permitted that, on a read of
> // APSR:
> // Bit[9] returns the value of CPSR.E.
> // Bits[8:6] return the value of CPSR.{A,I, F}, the mask bits.
> static const uint32_t ApsrMask = CpsrMaskQ | CondCodesMask | 0x000001D0;
>
> // CPSR (Current Program Status Register Mask).
> static const uint32_t CpsrMask = ApsrMask | 0x00F003DF;
>