diff options
| -rw-r--r-- | lib/lz4.c | 14 |
1 files changed, 7 insertions, 7 deletions
@@ -297,15 +297,15 @@ void LZ4_wildCopy(void* dstPtr, const void* srcPtr, void* dstEnd) do { memcpy(d,s,8); d+=8; s+=8; } while (d<e); } -/* customized variant of memcpy, which can overwrite up to 16 bytes beyond dstEnd */ +/* customized variant of memcpy, which can overwrite up to 32 bytes beyond dstEnd */ LZ4_FORCE_O2_INLINE_GCC_PPC64LE -void LZ4_wildCopy16(void* dstPtr, const void* srcPtr, void* dstEnd) +void LZ4_wildCopy32(void* dstPtr, const void* srcPtr, void* dstEnd) { BYTE* d = (BYTE*)dstPtr; const BYTE* s = (const BYTE*)srcPtr; BYTE* const e = (BYTE*)dstEnd; - do { memcpy(d,s,16); d+=16; s+=16; } while (d<e); + do { memcpy(d,s,16); memcpy(d+16,s+16,16); d+=32; s+=32; } while (d<e); } /*-************************************ @@ -317,7 +317,7 @@ void LZ4_wildCopy16(void* dstPtr, const void* srcPtr, void* dstEnd) #define LASTLITERALS 5 /* see ../doc/lz4_Block_format.md#parsing-restrictions */ #define MFLIMIT 12 /* see ../doc/lz4_Block_format.md#parsing-restrictions */ #define MATCH_SAFEGUARD_DISTANCE ((2*WILDCOPYLENGTH) - MINMATCH) /* ensure it's possible to write 2 x wildcopyLength without overflowing output buffer */ -#define FASTLOOP_SAFE_DISTANCE 32 +#define FASTLOOP_SAFE_DISTANCE 64 static const int LZ4_minLength = (MFLIMIT+1); #define KB *(1 <<10) @@ -1559,7 +1559,7 @@ LZ4_decompress_generic( { goto safe_literal_copy; } - LZ4_wildCopy16(op, ip, cpy); + LZ4_wildCopy32(op, ip, cpy); ip += length; op = cpy; } else { cpy = op+length; @@ -1597,7 +1597,7 @@ LZ4_decompress_generic( goto safe_match_copy; } - /* Fastpath check: Avoids a branch in LZ4_wildCopy16 if true */ + /* Fastpath check: Avoids a branch in LZ4_wildCopy32 if true */ if (!(dict == usingExtDict) || (match >= lowPrefix)) { if (offset >= 8) { memcpy(op, match, 8); @@ -1661,7 +1661,7 @@ LZ4_decompress_generic( memcpy(op, match, 8); if (length > 16) LZ4_wildCopy(op+8, match+8, cpy); } else { - LZ4_wildCopy16(op, match, cpy); + LZ4_wildCopy32(op, match, cpy); } op = cpy; /* wildcopy correction */ |