denuvo-ref/zstd
1
0
Fork 0
mirror of https://github.com/facebook/zstd synced 2026-08-22 22:32:07 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Merge 81980f7790 into 82d322c497

Browse source
This commit is contained in:
huangshangcheng 2026-08-04 11:32:11 -07:00 • committed by GitHub
commit 28374d3490
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 25 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

31
lib/compress/zstd_compress_internal.h
View file

@ -860,15 +860,34 @@ MEM_STATIC size_t ZSTD_count(const BYTE* pIn, const BYTE* pMatch, const BYTE* co
{ size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn);
if (diff) return ZSTD_NbCommonBytes(diff); }
pIn+=sizeof(size_t); pMatch+=sizeof(size_t);
while (pIn < pInLoopLimit) {
size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn);
if (!diff) { pIn+=sizeof(size_t); pMatch+=sizeof(size_t); continue; }
pIn += ZSTD_NbCommonBytes(diff);
return (size_t)(pIn - pStart);
} }
}
#if defined(ZSTD_ARCH_RISCV_RVV)
{
size_t vl;
while (pIn < pInLimit) {
vl = __riscv_vsetvl_e8m1((size_t)(pInLimit - pIn));
vuint8m1_t v_in = __riscv_vle8_v_u8m1(pIn, vl);
vuint8m1_t v_match = __riscv_vle8_v_u8m1(pMatch, vl);
vbool8_t mask = __riscv_vmsne_vv_u8m1_b8(v_in, v_match, vl);
long first_diff = __riscv_vfirst_m_b8(mask, vl);
if (first_diff >= 0) {
return (size_t)(pIn + first_diff - pStart);
}
pIn += vl;
pMatch += vl;
}
}
#else
while (pIn < pInLoopLimit) {
size_t const diff = MEM_readST(pMatch) ^ MEM_readST(pIn);
if (!diff) { pIn+=sizeof(size_t); pMatch+=sizeof(size_t); continue; }
pIn += ZSTD_NbCommonBytes(diff);
return (size_t)(pIn - pStart);
}
if (MEM_64bits() && (pIn<(pInLimit-3)) && (MEM_read32(pMatch) == MEM_read32(pIn))) { pIn+=4; pMatch+=4; }
if ((pIn<(pInLimit-1)) && (MEM_read16(pMatch) == MEM_read16(pIn))) { pIn+=2; pMatch+=2; }
if ((pIn<pInLimit) && (*pMatch == *pIn)) pIn++;
#endif
return (size_t)(pIn - pStart);
}