movbe

x86-64 and later

Move Data After Swapping Bytes

movbe reg16, mem16 | movbe reg32, mem32 | movbe reg64, mem64 | movbe mem16, reg16 | movbe mem32, reg32 | movbe mem64, reg64

Move Data After Swapping Bytes

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Forms

Every form of movbe the assembler accepts, from NASM's own instruction table. The second column is the processor that introduced the form; a badge marks a form that needs an extension, that is lockable, or that long mode dropped.

FormSinceNotes
movbe reg16, mem16x86-64apxlong
movbe reg32, mem32x86-64apxlong
movbe reg64, mem64x86-64long
movbe mem16, reg16x86-64apxlong
movbe mem32, reg32x86-64apxlong
movbe mem64, reg64x86-64long