I know that armv7 can use condition codes for load/store, like ldrne/streq. But A64 does not allow instructions to be conditionally executed. so how can i archive this in arm64:
ands tmp1, dstend, 7 # set nzcv flag with ands
# if not zero, ldr w6, [srcend, -4]!, str w6, [dstend, -4]!
# else, do nothing and goes on
...
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