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| author | Markus F.X.J. Oberhumer <markus@oberhumer.com> | 2013-02-04 02:26:14 +0100 |
|---|---|---|
| committer | Simon Shields <keepcalm444@gmail.com> | 2016-06-12 21:20:20 +1000 |
| commit | 579b11bb139ae8ab650f2bb6d6c0fc71bec529cf (patch) | |
| tree | 9bee9d6931a69b32ef44002e7b89eaafaf1e4c15 /lib | |
| parent | 39a4e2420fe3fec2019dc3ad9ebfc6c4ae7869c3 (diff) | |
| download | kernel_samsung_smdk4412-579b11bb139ae8ab650f2bb6d6c0fc71bec529cf.tar.gz kernel_samsung_smdk4412-579b11bb139ae8ab650f2bb6d6c0fc71bec529cf.tar.bz2 kernel_samsung_smdk4412-579b11bb139ae8ab650f2bb6d6c0fc71bec529cf.zip | |
lib/lzo: huge LZO decompression speedup on ARM by using unaligned access
Change-Id: I4dc172b2822504c3f2db1913ed9404e031861d55
Signed-off-by: Markus F.X.J. Oberhumer <markus@oberhumer.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/lzo/lzo1x_decompress_safe.c | 4 | ||||
| -rw-r--r-- | lib/lzo/lzodefs.h | 6 |
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)) |