Xilinx MicroBlaze Reference Manual page 292

swapb Swap Bytes
rD, rA
swapb
1 0 0 1 0 0
0
6
Description
Swaps the contents of register rA treated as four bytes, and places the result in rD. This effectively
converts the byte sequence in the register between endianness formats, either from little-endian to
big-endian or vice versa.
Pseudocode
(rD)[24:31]
(rD)[16:23]
←
(rD)[8:15]
←
(rD)[0:7]
Registers Altered
• rD
Latency
• 1 cycle
Note
This instruction is only valid if MicroBlaze is configured to use reorder instructions
(C_USE_REORDER_INSTR = 1).
MicroBlaze Processor Reference Guide
UG984 (v2018.2) June 21, 2018
rD rA
11
←
(rA)[0:7]
←
(rA)[8:15]
(rA)[16:23]
(rA)[24:31]
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Chapter 5: MicroBlaze Instruction Set Architecture
0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0
16 31
293
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