Xilinx MicroBlaze Reference Manual page 274

swapb
Swap Bytes
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 (v2016.2) June 8, 2016
UG984 (v2016.1) April 6, 2016
rD, rA
rD rA
1
1
←
(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
1
6
3
1
274
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