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Update zstd to 1.5.5.

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This commit is contained in:
Bartosz Taudul
2023-04-05 17:16:24 +02:00
parent 856027a27d
commit ab6c492117
21 changed files with 939 additions and 585 deletions
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zstd/common/bits.h
+30 -5
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@@ -17,7 +17,7 @@ MEM_STATIC unsigned ZSTD_countTrailingZeros32_fallback(U32 val)
{
assert(val != 0);
{
static const int DeBruijnBytePos[32] = {0, 1, 28, 2, 29, 14, 24, 3,
static const U32 DeBruijnBytePos[32] = {0, 1, 28, 2, 29, 14, 24, 3,
30, 22, 20, 15, 25, 17, 4, 8,
31, 27, 13, 23, 21, 19, 16, 7,
26, 12, 18, 6, 11, 5, 10, 9};
@@ -30,7 +30,7 @@ MEM_STATIC unsigned ZSTD_countTrailingZeros32(U32 val)
assert(val != 0);
# if defined(_MSC_VER)
# if STATIC_BMI2 == 1
return _tzcnt_u32(val);
return (unsigned)_tzcnt_u32(val);
# else
if (val != 0) {
unsigned long r;
@@ -69,7 +69,7 @@ MEM_STATIC unsigned ZSTD_countLeadingZeros32(U32 val)
assert(val != 0);
# if defined(_MSC_VER)
# if STATIC_BMI2 == 1
return _lzcnt_u32(val);
return (unsigned)_lzcnt_u32(val);
# else
if (val != 0) {
unsigned long r;
@@ -92,7 +92,7 @@ MEM_STATIC unsigned ZSTD_countTrailingZeros64(U64 val)
assert(val != 0);
# if defined(_MSC_VER) && defined(_WIN64)
# if STATIC_BMI2 == 1
return _tzcnt_u64(val);
return (unsigned)_tzcnt_u64(val);
# else
if (val != 0) {
unsigned long r;
@@ -123,7 +123,7 @@ MEM_STATIC unsigned ZSTD_countLeadingZeros64(U64 val)
assert(val != 0);
# if defined(_MSC_VER) && defined(_WIN64)
# if STATIC_BMI2 == 1
return _lzcnt_u64(val);
return (unsigned)_lzcnt_u64(val);
# else
if (val != 0) {
unsigned long r;
@@ -172,4 +172,29 @@ MEM_STATIC unsigned ZSTD_highbit32(U32 val) /* compress, dictBuilder, decodeCo
return 31 - ZSTD_countLeadingZeros32(val);
}
/* ZSTD_rotateRight_*():
* Rotates a bitfield to the right by "count" bits.
* https://en.wikipedia.org/w/index.php?title=Circular_shift&oldid=991635599#Implementing_circular_shifts
*/
MEM_STATIC
U64 ZSTD_rotateRight_U64(U64 const value, U32 count) {
assert(count < 64);
count &= 0x3F; /* for fickle pattern recognition */
return (value >> count) | (U64)(value << ((0U - count) & 0x3F));
}
MEM_STATIC
U32 ZSTD_rotateRight_U32(U32 const value, U32 count) {
assert(count < 32);
count &= 0x1F; /* for fickle pattern recognition */
return (value >> count) | (U32)(value << ((0U - count) & 0x1F));
}
MEM_STATIC
U16 ZSTD_rotateRight_U16(U16 const value, U32 count) {
assert(count < 16);
count &= 0x0F; /* for fickle pattern recognition */
return (value >> count) | (U16)(value << ((0U - count) & 0x0F));
}
#endif /* ZSTD_BITS_H */