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/arm64/lib/memset.S | 53 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
create mode 100644 arch/arm64/lib/memset.S
(limited to 'arch/arm64/lib/memset.S')
diff --git a/arch/arm64/lib/memset.S b/arch/arm64/lib/memset.S
new file mode 100644
index 00000000..87e4a68f
--- /dev/null
+++ b/arch/arm64/lib/memset.S
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include
+#include
+
+/*
+ * Fill in the buffer with character c (alignment handled by the hardware)
+ *
+ * Parameters:
+ * x0 - buf
+ * x1 - c
+ * x2 - n
+ * Returns:
+ * x0 - buf
+ */
+ENTRY(memset)
+ mov x4, x0
+ and w1, w1, #0xff
+ orr w1, w1, w1, lsl #8
+ orr w1, w1, w1, lsl #16
+ orr x1, x1, x1, lsl #32
+ subs x2, x2, #8
+ b.mi 2f
+1: str x1, [x4], #8
+ subs x2, x2, #8
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ sub x2, x2, #4
+ str w1, [x4], #4
+3: adds x2, x2, #2
+ b.mi 4f
+ sub x2, x2, #2
+ strh w1, [x4], #2
+4: adds x2, x2, #1
+ b.mi 5f
+ strb w1, [x4]
+5: ret
+ENDPROC(memset)
--
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