1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/memmove.c b/sysdeps/i386/i686/multiarch/memmove.c
new file mode 100644
index 0000000000..9e5ad6dc1a
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/memmove.c
@@ -0,0 +1,76 @@
+#include <stddef.h>
+
+void *
+__memmove (void *dst, const void *src, size_t n)
+{
+  const char *s = src;
+  char *d = dst;
+  void *ret = dst;
+  size_t offset_src = ((size_t) s) & (sizeof(size_t) - 1);
+  size_t offset_dst = ((size_t) d) & (sizeof(size_t) - 1);
+
+  if (offset_src != offset_dst)
+  {
+    if (s < d)
+    {
+      // backward copying
+      d += n;
+      s += n;
+      while (n--)
+        *--d = *--s;
+    }
+    else
+      // forward copying
+      while (n--)
+        *d++ = *s++;
+  }
+  else
+  {
+    if (s < d)
+    {
+		offset_src = (offset_src + (size_t)src) & (sizeof(size_t) - 1);
+      // backward copying
+      d += n;
+      s += n;
+      while (n-- && offset_src--)
+        *--d = *--s;
+      n++;
+      if (!n) return ret;
+      void **d1 = (void **)d;
+      void **s1 = (void **)s;
+      while (n >= sizeof(void *))
+      {
+        n -= sizeof(void *);
+        *--d1 = *--s1;
+      }
+      s = (char *)s1;
+      d = (char *)d1;
+      while (n--)
+        *--d = *--s;
+    }
+    else
+    {
+		if (offset_src) offset_src = sizeof(size_t) - offset_src;
+      // forward copying
+      while (n-- && offset_src--)
+        *d++ = *s++;
+      n++;
+      if (!n) return ret;
+      void **d1 = (void **)d;
+      void **s1 = (void **)s;
+      while (n >= sizeof(void *))
+      {
+        n -= sizeof(void *);
+        *d1++ = *s1++;
+      }
+      s = (char *)s1;
+      d = (char *)d1;
+      while (n--)
+        *d++ = *s++;
+    }
+  }
+  return ret;
+}
+
+weak_alias (__memmove, __GI_memmove)
+weak_alias (__memmove, memmove)