1 files changed, 73 insertions, 0 deletions
diff --git a/newlib/libc/machine/i386/memcpy.S b/newlib/libc/machine/i386/memcpy.S
new file mode 100644
index 00000000000..c0fd8f27e38
--- /dev/null
+++ b/newlib/libc/machine/i386/memcpy.S
@@ -0,0 +1,73 @@
+/*
+ * ====================================================
+ * 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
+	pushl esi
+	pushl edi
+	pushl ebx
+	movl 8(ebp),edi
+	movl 16(ebp),ecx
+	movl 12(ebp),esi
+	cld
+		
+#ifndef __OPTIMIZE_SIZE__
+		
+	cmpl $8,ecx
+	jbe .L3
+
+/* move any preceding bytes until destination address is long word aligned */
+		
+	movl edi,edx	
+	movl ecx,ebx
+	andl $3,edx
+	jz .L11
+	movl $4,ecx
+	subl edx,ecx
+	andl $3,ecx
+	subl ecx,ebx
+	rep
+	movsb
+	
+	mov ebx,ecx
+
+/* move bytes a long word at a time */
+		
+.L11:
+	shrl $2,ecx
+	.p2align 2
+	rep
+	movsl
+	
+	movl ebx,ecx
+	andl $3,ecx
+	
+#endif /* !__OPTIMIZE_SIZE__ */
+
+/* handle any remaining bytes */
+		
+.L3:		
+	rep
+	movsb
+.L5:		
+	movl 8(ebp),eax
+
+	leal -12(ebp),esp
+	popl ebx
+	popl edi
+	popl esi
+	leave
+	ret