|
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] xen: arm64: assembly optimised mem* and str*
commit 42c4eb6a83b1d1353ff0bf33faefa6848e0bb2b1
Author: Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Wed Mar 26 13:38:49 2014 +0000
Commit: Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Thu Apr 3 17:15:43 2014 +0100
xen: arm64: assembly optimised mem* and str*
Taken from Linux v3.14-rc7.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Acked-by: Julien Grall <julien.grall@xxxxxxxxxx>
Acked-by: Tim Deegan <tim@xxxxxxx>
---
xen/arch/arm/arm64/lib/Makefile | 2 +
xen/arch/arm/arm64/lib/memchr.S | 43 +++++++++++++++++++++++++++++
xen/arch/arm/arm64/lib/memcpy.S | 52 +++++++++++++++++++++++++++++++++++
xen/arch/arm/arm64/lib/memmove.S | 56 ++++++++++++++++++++++++++++++++++++++
xen/arch/arm/arm64/lib/memset.S | 52 +++++++++++++++++++++++++++++++++++
xen/arch/arm/arm64/lib/strchr.S | 41 +++++++++++++++++++++++++++
xen/arch/arm/arm64/lib/strrchr.S | 42 ++++++++++++++++++++++++++++
xen/include/asm-arm/string.h | 4 +-
8 files changed, 290 insertions(+), 2 deletions(-)
diff --git a/xen/arch/arm/arm64/lib/Makefile b/xen/arch/arm/arm64/lib/Makefile
index 32c02c4..9f3b236 100644
--- a/xen/arch/arm/arm64/lib/Makefile
+++ b/xen/arch/arm/arm64/lib/Makefile
@@ -1 +1,3 @@
+obj-y += memcpy.o memmove.o memset.o memchr.o
obj-y += bitops.o find_next_bit.o
+obj-y += strchr.o strrchr.o
diff --git a/xen/arch/arm/arm64/lib/memchr.S b/xen/arch/arm/arm64/lib/memchr.S
new file mode 100644
index 0000000..3cc1b01
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/memchr.S
@@ -0,0 +1,43 @@
+/*
+ * Based on arch/arm/lib/memchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * Find a character in an area of memory.
+ *
+ * Parameters:
+ * x0 - buf
+ * x1 - c
+ * x2 - n
+ * Returns:
+ * x0 - address of first occurrence of 'c' or 0
+ */
+ENTRY(memchr)
+ and w1, w1, #0xff
+1: subs x2, x2, #1
+ b.mi 2f
+ ldrb w3, [x0], #1
+ cmp w3, w1
+ b.ne 1b
+ sub x0, x0, #1
+ ret
+2: mov x0, #0
+ ret
+ENDPROC(memchr)
diff --git a/xen/arch/arm/arm64/lib/memcpy.S b/xen/arch/arm/arm64/lib/memcpy.S
new file mode 100644
index 0000000..c8197c6
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/memcpy.S
@@ -0,0 +1,52 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * Copy a buffer from src to dest (alignment handled by the hardware)
+ *
+ * Parameters:
+ * x0 - dest
+ * x1 - src
+ * x2 - n
+ * Returns:
+ * x0 - dest
+ */
+ENTRY(memcpy)
+ mov x4, x0
+ subs x2, x2, #8
+ b.mi 2f
+1: ldr x3, [x1], #8
+ subs x2, x2, #8
+ str x3, [x4], #8
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ ldr w3, [x1], #4
+ sub x2, x2, #4
+ str w3, [x4], #4
+3: adds x2, x2, #2
+ b.mi 4f
+ ldrh w3, [x1], #2
+ sub x2, x2, #2
+ strh w3, [x4], #2
+4: adds x2, x2, #1
+ b.mi 5f
+ ldrb w3, [x1]
+ strb w3, [x4]
+5: ret
+ENDPROC(memcpy)
diff --git a/xen/arch/arm/arm64/lib/memmove.S b/xen/arch/arm/arm64/lib/memmove.S
new file mode 100644
index 0000000..1bf0936
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/memmove.S
@@ -0,0 +1,56 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * Move a buffer from src to test (alignment handled by the hardware).
+ * If dest <= src, call memcpy, otherwise copy in reverse order.
+ *
+ * Parameters:
+ * x0 - dest
+ * x1 - src
+ * x2 - n
+ * Returns:
+ * x0 - dest
+ */
+ENTRY(memmove)
+ cmp x0, x1
+ b.ls memcpy
+ add x4, x0, x2
+ add x1, x1, x2
+ subs x2, x2, #8
+ b.mi 2f
+1: ldr x3, [x1, #-8]!
+ subs x2, x2, #8
+ str x3, [x4, #-8]!
+ b.pl 1b
+2: adds x2, x2, #4
+ b.mi 3f
+ ldr w3, [x1, #-4]!
+ sub x2, x2, #4
+ str w3, [x4, #-4]!
+3: adds x2, x2, #2
+ b.mi 4f
+ ldrh w3, [x1, #-2]!
+ sub x2, x2, #2
+ strh w3, [x4, #-2]!
+4: adds x2, x2, #1
+ b.mi 5f
+ ldrb w3, [x1, #-1]
+ strb w3, [x4, #-1]
+5: ret
+ENDPROC(memmove)
diff --git a/xen/arch/arm/arm64/lib/memset.S b/xen/arch/arm/arm64/lib/memset.S
new file mode 100644
index 0000000..25a4fb6
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/memset.S
@@ -0,0 +1,52 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * 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)
diff --git a/xen/arch/arm/arm64/lib/strchr.S b/xen/arch/arm/arm64/lib/strchr.S
new file mode 100644
index 0000000..9e265e4
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/strchr.S
@@ -0,0 +1,41 @@
+/*
+ * Based on arch/arm/lib/strchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * Find the first occurrence of a character in a string.
+ *
+ * Parameters:
+ * x0 - str
+ * x1 - c
+ * Returns:
+ * x0 - address of first occurrence of 'c' or 0
+ */
+ENTRY(strchr)
+ and w1, w1, #0xff
+1: ldrb w2, [x0], #1
+ cmp w2, w1
+ ccmp w2, wzr, #4, ne
+ b.ne 1b
+ sub x0, x0, #1
+ cmp w2, w1
+ csel x0, x0, xzr, eq
+ ret
+ENDPROC(strchr)
diff --git a/xen/arch/arm/arm64/lib/strrchr.S b/xen/arch/arm/arm64/lib/strrchr.S
new file mode 100644
index 0000000..3791754
--- /dev/null
+++ b/xen/arch/arm/arm64/lib/strrchr.S
@@ -0,0 +1,42 @@
+/*
+ * Based on arch/arm/lib/strrchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <xen/config.h>
+
+/*
+ * Find the last occurrence of a character in a string.
+ *
+ * Parameters:
+ * x0 - str
+ * x1 - c
+ * Returns:
+ * x0 - address of last occurrence of 'c' or 0
+ */
+ENTRY(strrchr)
+ mov x3, #0
+ and w1, w1, #0xff
+1: ldrb w2, [x0], #1
+ cbz w2, 2f
+ cmp w2, w1
+ b.ne 1b
+ sub x3, x0, #1
+ b 1b
+2: mov x0, x3
+ ret
+ENDPROC(strrchr)
diff --git a/xen/include/asm-arm/string.h b/xen/include/asm-arm/string.h
index 7d8b35a..3242762 100644
--- a/xen/include/asm-arm/string.h
+++ b/xen/include/asm-arm/string.h
@@ -3,8 +3,6 @@
#include <xen/config.h>
-#if defined(CONFIG_ARM_32)
-
/*
* We don't do inline string functions, since the
* optimised inline asm versions are not small.
@@ -29,6 +27,8 @@ extern void * memset(void *, int, __kernel_size_t);
#define __HAVE_ARCH_MEMCHR
extern void * memchr(const void *, int, __kernel_size_t);
+#if defined(CONFIG_ARM_32)
+
extern void __memzero(void *ptr, __kernel_size_t n);
#define memset(p,v,n) \
--
generated by git-patchbot for /home/xen/git/xen.git#master
_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog
|
 |
Lists.xenproject.org is hosted with RackSpace, monitoring our |