IPR-NIOS Altera, IPR-NIOS Datasheet - Page 212

• 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

8–26
callr
Nios II Processor Reference Handbook
Operation:
Assembler Syntax:
Example:
Description:
Usage:
Exceptions:
Instruction Type:
Instruction Fields:
31
30
29
A
28
27
26
25
24
0
ra ← PC + 4
PC ← rA
callr rA
callr r6
Saves the address of the next instruction in the return address register, and transfers execution
to the address contained in register rA.
callr is used to dereference C-language function pointers.
Misaligned destination address
R
A = Register index of operand rA
23
22
21
20
0x1f
19
18
17
16
15
14
0x1d
13
12
11
10
9
call subroutine in register
0
8
Chapter 8: Instruction Set Reference
December 2010 Altera Corporation
7
6
5
Instruction Set Reference
4
0x3a
3
2
1
0