IPR-NIOS Altera, IPR-NIOS Datasheet - Page 236

• Manufacturer Part Number: IPR-NIOS
• Description: IP NIOS II MEGACORE RENEW
• Manufacturer: Altera
• Type: MegaCorer

Specifications of IPR-NIOS

• License: Renewal License
• Lead Free Status / RoHS Status: Not applicable / Not applicable

8–50
eret
Nios II Processor Reference Handbook
Operation:
Assembler Syntax:
Example:
Description:
Usage:
Exceptions:
Instruction Type:
Instruction Fields:
31
30
0x1d
29
28
27
26
25
0x1e
24
status ← estatus
PC ← ea
eret
eret
Copies the value of estatus into the status register, and transfers execution to the address in
ea.
Use eret to return from traps, external interrupts, and other exception handling routines. Note
that before returning from hardware interrupt exceptions, the exception handler must adjust the
ea register.
Misaligned destination address
Supervisor-only instruction
R
None
23
22
21
20
19
0
18
17
16
15
14
0x01
13
12
11
10
9
0
8
Chapter 8: Instruction Set Reference
December 2010 Altera Corporation
7
6
exception return
5
Instruction Set Reference
4
0x3a
3
2
1
0