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authorYann Collet <yann.collet.73@gmail.com>2015-07-16 08:03:55 (GMT)
committerYann Collet <yann.collet.73@gmail.com>2015-07-16 08:03:55 (GMT)
commit3e579afa6d721f4086e11dd8b9db8f8601c0f6d9 (patch)
treedd1d70e74c36bd4454187116886369d1ea9cccf5 /lib
parent795a2cdb1b9b9e78bcf4ee9be6c0f15f9005c090 (diff)
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Slightly improved decompression speed
Slightly decreased decompression stack usage in 64-bits mode
Diffstat (limited to 'lib')
-rw-r--r--lib/lz4.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/lz4.c b/lib/lz4.c
index ac11222..1c2d279 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1132,8 +1132,8 @@ FORCE_INLINE int LZ4_decompress_generic(
const BYTE* const lowLimit = lowPrefix - dictSize;
const BYTE* const dictEnd = (const BYTE*)dictStart + dictSize;
- const size_t dec32table[] = {4, 1, 2, 1, 4, 4, 4, 4};
- const size_t dec64table[] = {0, 0, 0, (size_t)-1, 0, 1, 2, 3};
+ const unsigned dec32table[] = {4, 1, 2, 1, 4, 4, 4, 4};
+ const int dec64table[] = {0, 0, 0, -1, 0, 1, 2, 3};
const int safeDecode = (endOnInput==endOnInputSize);
const int checkOffset = ((safeDecode) && (dictSize < (int)(64 KB)));
@@ -1247,15 +1247,16 @@ FORCE_INLINE int LZ4_decompress_generic(
cpy = op + length;
if (unlikely(offset<8))
{
- const size_t dec64 = dec64table[offset];
+ const int dec64 = dec64table[offset];
op[0] = match[0];
op[1] = match[1];
op[2] = match[2];
op[3] = match[3];
match += dec32table[offset];
memcpy(op+4, match, 4);
- op += 8; match -= dec64;
- } else { LZ4_copy8(op, match); op+=8; match+=8; }
+ match -= dec64;
+ } else { LZ4_copy8(op, match); match+=8; }
+ op += 8;
if (unlikely(cpy>oend-12))
{