2.5.1. Floating-Point System ID Register

The FPSID Register characteristics are:


Provides information about the VFP implementation.

Usage constraints

Only accessible in privileged modes.


Available in all FPU configurations.


See the register summary in Table 2.2.

Figure 2.1 shows the FPSID Register bit assignments.

Figure 2.1. FPSID Register bit assignments

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Table 2.4 shows the FPSID Register bit assignments.

Table 2.4. FPSID Register bit assignments


Denotes ARM

[23]SWHardware implementation with no software emulation

The null VFP sub-architecture

[15:8]Part number


[3:0]RevisionRevision 4

You can access the FPSID Register with the following VMRS instruction:

VMRS <Rd>, FPSID ; Read Floating-Point System ID Register
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