From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/tile/include/asm/checksum.h | 42 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 arch/tile/include/asm/checksum.h

(limited to 'arch/tile/include/asm/checksum.h')

diff --git a/arch/tile/include/asm/checksum.h b/arch/tile/include/asm/checksum.h
new file mode 100644
index 00000000..b21a2fde
--- /dev/null
+++ b/arch/tile/include/asm/checksum.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CHECKSUM_H
+#define _ASM_TILE_CHECKSUM_H
+
+#include <asm-generic/checksum.h>
+
+/* Allow us to provide a more optimized do_csum(). */
+__wsum do_csum(const unsigned char *buff, int len);
+#define do_csum do_csum
+
+/*
+ * Return the sum of all the 16-bit subwords in a long.
+ * This sums two subwords on a 32-bit machine, and four on 64 bits.
+ * The implementation does two vector adds to capture any overflow.
+ */
+static inline unsigned int csum_long(unsigned long x)
+{
+	unsigned long ret;
+#ifdef __tilegx__
+	ret = __insn_v2sadu(x, 0);
+	ret = __insn_v2sadu(ret, 0);
+#else
+	ret = __insn_sadh_u(x, 0);
+	ret = __insn_sadh_u(ret, 0);
+#endif
+	return ret;
+}
+
+#endif /* _ASM_TILE_CHECKSUM_H */
-- 
cgit v1.3.1