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MOVBE
MOVBE moves a value from a source to a destination while reversing the byte order of the data.
The following table covers the supported source and destinations.
| source | destination(s) |
|---|---|
| reg | mN |
| mN | reg |
| #I | imm |
DO NOT support LOCK
The instruction is only available in 64-bit mode or compatibility mode when the processor supports the MOVBE feature. It is not available in 32-bit mode.
The operand size must be 1, 2, 4, or 8 bytes. The instruction performs a big-endian to little-endian (or vice versa) conversion; users MUST ensure the operand size matches the target data width to avoid incorrect byte reversal or memory corruption. This instruction is intended to replace the sequence of MOV followed by BSWAP.