Formats; Instructions - Xilinx MicroBlaze Reference Manual

Formats

MicroBlaze uses two instruction formats: Type A and Type B.
Type A
Type A is used for register-register instructions. It contains the opcode, one destination and two
source registers.
Opcode Destination Reg Source Reg A
0 6
Type B
Type B is used for register-immediate instructions. It contains the opcode, one destination and one
source registers, and a source 16-bit immediate value.
Opcode Destination Reg Source Reg A
0 6

Instructions

This section provides descriptions of MicroBlaze instructions. Instructions are listed in alphabetical
order. For each instruction Xilinx provides the mnemonic, encoding, a description, pseudocode of its
semantics, and a list of registers that it modifies.
MicroBlaze Processor Reference Guide
UG984 (v2016.2) June 8, 2016
UG984 (v2016.1) April 6, 2016
Chapter 5: MicroBlaze Instruction Set Architecture
Source Reg B
11 16
11 16
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0 0 0 0 0 0 0 0 0 0 0
21
Immediate Value
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31
31
179