Xilinx MicroBlaze Reference Manual page 251

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
Registers Altered
•
Latency
•
Note
This instruction is only valid if MicroBlaze is configured to use reorder instructions
(C_USE_REORDER_INSTR = 1).
MicroBlaze Processor Reference Guide
UG081 (v14.7)
rD, rA
rD rA
1
1
←
(rD)[24:31] (rA)[0:7]
←
(rD)[16:23] (rA)[8:15]
←
(rD)[8:15] (rA)[16:23]
←
(rD)[0:7] (rA)[24:31]
rD
1 cycle
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0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0
1
6
Instructions
3
1
251
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