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

Thumb Instruction Set Encoding
A6.3.10 Store single data item
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 1 1 0 0 0 op1 0 op2
Table A6-21 show the allocation of encodings in this space. Other encodings in this space are UNDEFINED.
These encodings are all available in ARMv6T2 and above.
op1 op2 Instruction See
Table A6-21 Store single data item
100 - Store Register Byte STRB (immediate, Thumb) on page A8-388
000 1xx1xx
1100xx
1110xx Store Register Byte Unprivileged STRBT on page A8-394
0xxxxx Store Register Byte STRB (register) on page A8-392
101 - Store Register Halfword STRH (immediate, Thumb) on page A8-408
001 1xx1xx
1100xx
1110xx Store Register Halfword Unprivileged STRHT on page A8-414
001 0xxxxx Store Register Halfword STRH (register) on page A8-412
110 - Store Register (immediate) STR (immediate, Thumb) on page A8-382
010 1xx1xx
1100xx
1110xx Store Register Unprivileged STRT on page A8-416
0xxxxx Store Register (register) STR (register) on page A8-386
A6-30 Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. ARM DDI 0406B