20060303a

1 files changed, 35 insertions, 0 deletions

diff --git a/libkern/memcpy-thumb.c b/libkern/memcpy-thumb.c
new file mode 100644
index 00000000..35f0afc5
--- /dev/null
+++ b/libkern/memcpy-thumb.c
@@ -0,0 +1,35 @@
+#include	<u.h>
+#include	<libc.h>
+
+void*
+memmove(void *a1, void *a2, ulong n)
+{
+	char *s1, *s2;
+
+	if((long)n < 0)
+		abort();
+	if(a1 > a2)
+		goto back;
+	s1 = a1;
+	s2 = a2;
+	while(n > 0) {
+		*s1++ = *s2++;
+		n--;
+	}
+	return a1;
+
+back:
+	s1 = (char*)a1 + n;
+	s2 = (char*)a2 + n;
+	while(n > 0) {
+		*--s1 = *--s2;
+		n--;
+	}
+	return a1;
+}
+
+void*
+memcpy(void *a1, void *a2, ulong n)
+{
+	return memmove(a1, a2, n);
+}