2.12 Predeclared extension register names

You can write the names of NEON and VFP registers either in upper case or lower case.

The following extension register names are predeclared:

Table 2-3 Predeclared extension registers

Register names

Meaning

q0-q15 and Q0-Q15

NEON quadword registers

d0-d31 and D0-D31

NEON doubleword registers, VFP double-precision registers.

Note:

Some versions of VFP have sixteen double-precision registers, D0-D15.

s0-s31 and S0-S31

VFP single-precision registers

Non-ConfidentialPDF file icon PDF versionARM DUI0473M
Copyright © 2010-2016 ARM Limited or its affiliates. All rights reserved.