FPSID, the floating-point system ID register

The FPSID is a read-only register. You can read it to find out which implementation of the NEON or VFP architecture your program is running on.

bit[31:24]

Implementor code

bit[23]

0 for hardware coprocessor, 1 for software implementation

bit[22:16]

Subarchitecture version number

bit[15:8]

Implementation defined part number

bit[7:4]

Implementation defined variant number

bit[3:0]

Implementation defined revision number.

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Concepts
Reference
  • The Technical Reference Manual for your VFP coprocessor or floating-point capable processor.

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