1 files changed, 58 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/memcpy.S b/newlib/libc/machine/i386/memcpy.S
new file mode 100644
index 0000000..bf1dd6b
--- /dev/null
+++ b/newlib/libc/machine/i386/memcpy.S
@@ -0,0 +1,58 @@
+/*
+ * ====================================================
+ * Copyright (C) 1998 by Cygnus Solutions. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+	#include "i386mach.h"
+
+	.global	SYM (memcpy)
+
+SYM (memcpy):
+
+	pushl ebp
+	movl esp,ebp
+	subl $16,esp
+	pushl edi
+	pushl esi
+	movl 8(ebp),edi
+	movl 12(ebp),esi
+	movl 16(ebp),ecx
+	cld
+
+#ifndef __OPTIMIZE_SIZE__
+/* if aligned on long boundary, move doublewords at a time first */
+
+	movl edi,eax
+	orl esi,eax
+	testb $3,al
+	jne BYTEMOVE
+	shrl $2,ecx
+	rep
+	movsl
+
+/* calculate any remainder bytes after moving doublewords */
+
+	movl 16(ebp),ecx
+	andl $3,ecx
+#endif /* not __OPTIMIZE_SIZE__ */
+	
+/* move any unaligned bytes or remainder bytes, one at a time */
+
+BYTEMOVE: 
+	rep
+	movsb
+
+/* return destination address */
+
+	movl 8(ebp),eax
+
+	leal -24(ebp),esp
+	popl esi
+	popl edi
+	leave
+	ret