From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 15 Dec 2017 09:38:53 -0500
Subject: Import newlib and create makefile

---
 newlib/libc/machine/i386/memcpy.S | 58 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 newlib/libc/machine/i386/memcpy.S

(limited to 'newlib/libc/machine/i386/memcpy.S')

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
-- 
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