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mdbx: fix page-boundary checking inside accelerated scan4seq().

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This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2022-08-07 22:24:00 +03:00
parent d6603a0c0a
commit 3de759a7be
1 changed files with 2 additions and 2 deletions
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4
src/core.c
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@ -6015,7 +6015,7 @@ scan4seq_avx2(pgno_t *range, const size_t len, const unsigned seq) {
#else #else
const unsigned on_page_safe_mask = 0xfe0 /* enough for '-31' bytes offset */; const unsigned on_page_safe_mask = 0xfe0 /* enough for '-31' bytes offset */;
#endif #endif
if (likely(on_page_safe_mask & (uintptr_t)range)) { if (likely(on_page_safe_mask & (uintptr_t)(range + offset))) {
const unsigned extra = (unsigned)(detent + 8 - range); const unsigned extra = (unsigned)(detent + 8 - range);
assert(extra > 0 && extra < 8); assert(extra > 0 && extra < 8);
mask = 0xFF << extra; mask = 0xFF << extra;
@ -6092,7 +6092,7 @@ scan4seq_sse2(pgno_t *range, const size_t len, const unsigned seq) {
#else #else
const unsigned on_page_safe_mask = 0xff0 /* enough for '-15' bytes offset */; const unsigned on_page_safe_mask = 0xff0 /* enough for '-15' bytes offset */;
#endif #endif
if (likely(on_page_safe_mask & (uintptr_t)range)) { if (likely(on_page_safe_mask & (uintptr_t)(range + offset))) {
const unsigned extra = (unsigned)(detent + 4 - range); const unsigned extra = (unsigned)(detent + 4 - range);
assert(extra > 0 && extra < 4); assert(extra > 0 && extra < 4);
mask = 0xF << extra; mask = 0xF << extra;