STRB(1) (Thumb*) - Store Register Byte
Syntax
STRB op, [basereg, #value]
where:
|
op |
Register containing source |
|
basereg |
Base register containing the base address |
|
value |
5-bit immediate value added to basereg constituting the address |
Description
The STRB instruction in this format takes 8-bit data from op and stores it to an address specified by value . It enables access to structure (record) fields.
Note
A data abort exception is generated if an invalid load or store data access
is attempted.
Addressing Mode
No operands.Flags Affected
|
N |
Z |
C |
V |
Q |
S |
I |
F |
T |
|
|
|
|
|
|
|
|
|
|
|
15 |
14 |
13 |
12 |
11 |
10 |
|
6 |
5 |
|
3 |
2 |
|
0 |
|
0 |
1 |
1 |
0 |
0 |
value |
basereg |
op |
||||||
Example
1 ;@.text
2 ;@.globl funstrb
3 ;@.align 0
4 ;
5 AREA example,CODE,READONLY
6 CODE16
7
8 label1
9 ; Store low byte of register R4
10 ; to memory at address given by
11 ; value of R1 plus offset of 12
12 ; bytes
13 00000000 700C STRB R4, [R1, #OxC]
Further Information
See LDRB(1) InstructionSee LDRB(2) Instruction
See LDRSB Instruction
See STRB(2) Instruction