Hi all,
The LDM and STM instruction is no more supported in ARMv8 and instead LTP and STP is used.
What is the key difference between the same why the instruction is loaded and stored in pair.
ARMv8 ISA overview :
The LDM, STM, PUSH and POP instructions do not exist in A64, however bulk transfers can be constructed using the LDP and STP instructions which load and store a pair of independent registers from consecutive memory locations, and which support unaligned addresses when accessing normal memory. The LDNP and STNP instructions additionally provide a “streaming” or ”non-temporal” hint that the data does not need to be retained in caches. The PRFM (prefetch memory) instructions also include hints for “streaming” or “non-temporal” accesses, and allow targeting of a prefetch to a specific cache level.