ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

B6.1.14 VMRS
System Instructions
Move to ARM core register from Advanced SIMD and VFP extension System Register moves the value of
an extension system register to a general-purpose register.
Encoding T1 / A1 VFPv2, VFPv3, Advanced SIMD
VMRS ,
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1 1 1 0 1 1 1 0 1 1 1 1 reg Rt 1 0 1 0 (0)(0)(0) 1 (0)(0)(0)(0)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
cond 1 1 1 0 1 1 1 1 reg Rt 1 0 1 0 (0)(0)(0) 1 (0)(0)(0)(0)
t = UInt(Rt);
if t == 13 && CurrentInstrSet() != InstrSet_ARM then UNPREDICTABLE;
if t == 15 && reg != ‘0001’ then UNPREDICTABLE;
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. B6-27