AuroraMiddleware/lz4
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Slightly improved compression speed on ARMv6

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This commit is contained in:
Yann Collet 2015-08-16 02:33:57 +01:00
parent 0f2bf0c54e
commit d15ac1f1a7
2 changed files with 12 additions and 11 deletions
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1
NEWS
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@ -1,5 +1,6 @@
r132
Improved: Small decompression speed boost (+4%)
Improved: Performance on ARMv6
Makefile: Generate intermediate object files (*.o) for faster compilation on low power systems
r131

22
lib/lz4.c
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@ -158,27 +158,28 @@ static U16 LZ4_read16(const void* memPtr) { return *(const U16*) memPtr; }
static U32 LZ4_read32(const void* memPtr) { return *(const U32*) memPtr; }
static size_t LZ4_read_ARCH(const void* memPtr) { return *(const size_t*) memPtr; }
static void LZ4_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
#else
static U16 LZ4_read16(const void* memPtr)
{
U16 val16;
memcpy(&val16, memPtr, 2);
return val16;
U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
}
static U32 LZ4_read32(const void* memPtr)
{
U32 val32;
memcpy(&val32, memPtr, 4);
return val32;
U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
}
static size_t LZ4_read_ARCH(const void* memPtr)
{
size_t val;
memcpy(&val, memPtr, sizeof(val));
return val;
size_t val; memcpy(&val, memPtr, sizeof(val)); return val;
}
static void LZ4_write16(void* memPtr, U16 value)
{
memcpy(memPtr, &value, sizeof(value));
}
#endif // LZ4_FORCE_DIRECT_MEMORY_ACCESS
@ -201,7 +202,7 @@ static void LZ4_writeLE16(void* memPtr, U16 value)
{
if (LZ4_isLittleEndian())
{
memcpy(memPtr, &value, 2);
LZ4_write16(memPtr, value);
}
else
{
@ -218,7 +219,6 @@ static void LZ4_wildCopy(void* dstPtr, const void* srcPtr, void* dstEnd)
const BYTE* s = (const BYTE*)srcPtr;
BYTE* const e = (BYTE*)dstEnd;
do { memcpy(d,s,8); d+=8; s+=8; } while (d<e);
//do { memcpy(d,s,16); d+=16; s+=16; } while (d<e);
}