Entry
R0 -> from
R1 -> to
R2 = size in bytes
Copies R2 bytes from R0 to R1. R0 and R1 need not be word-aligned, and R2 need not be a multiple of 4. This SWI uses the optimised memory copying routine given in the RISC OS 2 PRMs. It does not cope with overlap (which is why it‘s separate from WimpExt_MemCopy).
Provided by MemMove
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