ARM VERSION 1.2 - Manual (Page 182)

ARM Instruction Reference
4-72 Copyright © 2000, 2001 ARM Limited. All rights reserved. ARM DUI 0068B
4.8.1 SWI
Software interrupt.
Syntax
SWI{cond} immed_24
where:
cond is an optional condition code (see Conditional execution on page 4-4).
immed_24 is an expression evaluating to an integer in the range 0-2 24 –1 (a 24-bit
integer).
Usage
The SWI instruction causes a SWI exception. This means that the processor mode
changes to Supervisor, the CPSR is saved to the Supervisor mode SPSR, and execution
branches to the SWI vector (see the Handling Processor Exceptions chapter in ADS
Developer Guide).
Condition flags
This instruction does not affect the flags.
Architectures
This instruction is available in all versions of the ARM architecture.
Example
SWI 0x123456