From 42b775abafafdf811ef300e869a4e1480ef1cf95 Mon Sep 17 00:00:00 2001 From: "Markus F.X.J. Oberhumer" Date: Mon, 4 Feb 2013 02:26:14 +0100 Subject: lib/lzo: huge LZO decompression speedup on ARM by using unaligned access Signed-off-by: Markus F.X.J. Oberhumer --- lib/lzo/lzo1x_decompress_safe.c | 4 ++++ lib/lzo/lzodefs.h | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/lib/lzo/lzo1x_decompress_safe.c b/lib/lzo/lzo1x_decompress_safe.c index 569985d522d5..e3edc5f3f5ee 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 6710b83ce72e..db756ccb2756 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)) -- cgit v1.2.3