Function _mi_memcpy

3rd/mimalloc-2.0.9/include/mimalloc-internal.h:1055–1062

#include <string.h>
extern bool _mi_cpu_has_fsrm;
static inline void _mi_memcpy(void* dst, const void* src, size_t n) {
  if (_mi_cpu_has_fsrm) {
    __movsb((unsigned char*)dst, (const unsigned char*)src, n);
  }
  else {
    memcpy(dst, src, n);
  }
}
static inline void _mi_memzero(void* dst, size_t n) {
  if (_mi_cpu_has_fsrm) {
    __stosb((unsigned char*)dst, 0, n);