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authorMarkus F.X.J. Oberhumer <markus@oberhumer.com>2013-02-04 02:26:14 +0100
committerZiyan <jaraidaniel@gmail.com>2016-03-11 16:11:14 +0100
commitb0d1853f2f9da3c8eda38714955629d40d016731 (patch)
treec0a2c7d8d4181ad3429dccc969ac428d692143d0 /lib
parent711c774ddfde3748f84492632d3ca42a5d9ce090 (diff)
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lib/lzo: huge LZO decompression speedup on ARM by using unaligned access
Change-Id: I26fa643682c79d1e79ded0752fb37584b4aeef73 Signed-off-by: Markus F.X.J. Oberhumer <markus@oberhumer.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/lzo/lzo1x_decompress_safe.c4
-rw-r--r--lib/lzo/lzodefs.h6
2 files changed, 10 insertions, 0 deletions
diff --git a/lib/lzo/lzo1x_decompress_safe.c b/lib/lzo/lzo1x_decompress_safe.c
index 569985d522d..e3edc5f3f5e 100644
--- a/lib/lzo/lzo1x_decompress_safe.c
+++ b/lib/lzo/lzo1x_decompress_safe.c
@@ -72,9 +72,11 @@ copy_literal_run:
COPY8(op, ip);
op += 8;
ip += 8;
+# if !defined(__arm__)
COPY8(op, ip);
op += 8;
ip += 8;
+# endif
} while (ip < ie);
ip = ie;
op = oe;
@@ -159,9 +161,11 @@ copy_literal_run:
COPY8(op, m_pos);
op += 8;
m_pos += 8;
+# if !defined(__arm__)
COPY8(op, m_pos);
op += 8;
m_pos += 8;
+# endif
} while (op < oe);
op = oe;
if (HAVE_IP(6)) {
diff --git a/lib/lzo/lzodefs.h b/lib/lzo/lzodefs.h
index 6710b83ce72..db756ccb275 100644
--- a/lib/lzo/lzodefs.h
+++ b/lib/lzo/lzodefs.h
@@ -12,8 +12,14 @@
*/
+#if 1 && defined(__arm__) && ((__LINUX_ARM_ARCH__ >= 6) || defined(__ARM_FEATURE_UNALIGNED))
+#define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS 1
+#define COPY4(dst, src) \
+ * (u32 *) (void *) (dst) = * (const u32 *) (const void *) (src)
+#else
#define COPY4(dst, src) \
put_unaligned(get_unaligned((const u32 *)(src)), (u32 *)(dst))
+#endif
#if defined(__x86_64__)
#define COPY8(dst, src) \
put_unaligned(get_unaligned((const u64 *)(src)), (u64 *)(dst))