13.4.1. Floating-Point System ID Register, FPSID

The FPSID Register is a read-only register that must be accessed in privileged mode only. It indicates which NEON and VFP implementation is being used.

Figure 13.3 shows the bit arrangement of the FPSID Register.

Figure 13.3. Floating-Point System ID Register format


Table 13.7 shows how the bit values correspond with the FPSID Register functions.

Table 13.7. FPSID Register bit functions

BitsFieldFunction

[31:24]

Implementor

ARM:

0x41 = A

[23]

Hardware or software

0 = hardware implementation

[22:16]

Sub architecture version

The Null VFP sub-architecture:

0x03

[15:8]

Part number

VFP:

0x30

[7:4]

Variant

VFP interface:

0xC

[3:0]

Revision

Version:

0x3


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