Epson ARM.POWERED ARM720T - Manual (Page 34)

1: Introduction
1-14 EPSON ARM720T CORE CPU MANUAL
1.3.3 Thumb instruction set
This section gives an overview of the Thumb instructions available. For full details of these
instructions, see the ARM Architecture Reference Manual .
The Thumb instruction set formats are shown in Figure 1-4.
Figure 1-4 Thumb instruction set formats
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Rd
Rd Rb
Rb
Op
0 0 1
H1 H2
0 1 0 0 0 0
0 1 0 0 1
Ro 1 L B 0
Offset8
Op
Word8
Rd
Rn/
offset3
Rd Rs Op 0 0 0 1 1 1
Rd Op
Rd Rs
RdHd Rs/Hs 0 1 0 0 0 1
0 1 0
Rd Rb Ro 1 H S 1 0 1 0
Offset5 B L 0 1 1
Rb Rd Offset5 0 L 1 0 0
Rd Word8 1 L 1 0 0
Rd Word8 0 SP 1 0 1
SWord7 0 0 0 S 1 1 0 1 0
Rlist 1 0 R 1 1 L 1 0
Rlist Rb 0 0 L 1 1
Softset8 Cond 0 1 1 1
Value8 1 1 1 1 1 0 1 1
Offset11 0 1 1 0 1
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
03
04
06
02
05
07
08
09
10
11
12
13
14
15
16
17
18
19
Move shifted register
Move, compare, add, and subtract
immediate
ALU operation
High register operations and branch
exchange
PC-relative load
Load and store with relative offset
Load and store sign-extended byte and
halfword
Load and store with immediate offset
Load and store halfword
SP-relative load and store
Load address
Add offset to stack pointer
Push and pop registers
Multiple load and store
Add and subtract
Conditional branch
Software interrupt
Unconditional branch
Long branch with link Offset H 1 1 1 1
Offset5 Rd Rs Op 0 0 0 01