1 files changed, 43 insertions, 0 deletions

diff --git a/arch/x86/lib/memcpy_32.c b/arch/x86/lib/memcpy_32.c
new file mode 100644
index 000000000000..8ac51b82a632
--- /dev/null
+++ b/arch/x86/lib/memcpy_32.c
@@ -0,0 +1,43 @@
+#include <linux/string.h>
+#include <linux/module.h>
+
+#undef memcpy
+#undef memset
+
+void *memcpy(void *to, const void *from, size_t n)
+{
+#ifdef CONFIG_X86_USE_3DNOW
+        return __memcpy3d(to, from, n);
+#else
+        return __memcpy(to, from, n);
+#endif
+}
+EXPORT_SYMBOL(memcpy);
+
+void *memset(void *s, int c, size_t count)
+{
+        return __memset(s, c, count);
+}
+EXPORT_SYMBOL(memset);
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+        int d0, d1, d2;
+
+        if (dest < src) {
+                memcpy(dest,src,n);
+        } else {
+                __asm__ __volatile__(
+                        "std\n\t"
+                        "rep\n\t"
+                        "movsb\n\t"
+                        "cld"
+                        : "=&c" (d0), "=&S" (d1), "=&D" (d2)
+                        :"0" (n),
+                         "1" (n-1+(const char *)src),
+                         "2" (n-1+(char *)dest)
+                        :"memory");
+        }
+        return dest;
+}
+EXPORT_SYMBOL(memmove);