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关于memcpy的src dst地址4,8字节对齐产生拷贝速度差异的问题

最近在用memcpy发现源,目的地址如果是4字节对齐,或8字节对齐会产生巨大的速度差异, 请问下TI K2里面是怎么实现memcpy的, 有没有源码可以让我看一下?