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mdbx: minor refine MDBX_UNALIGNED_OK.

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Леонид Юрьев (Leonid Yuriev) 2022-07-11 23:06:09 +03:00
parent 08e936a809
commit a82f59a998
1 changed files with 6 additions and 5 deletions
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11
src/options.h
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@ -370,14 +370,11 @@
#endif /* MDBX_64BIT_CAS */
#ifndef MDBX_UNALIGNED_OK
#if defined(__ALIGNED__) || defined(__SANITIZE_UNDEFINED__)
#if defined(__ALIGNED__) || defined(__SANITIZE_UNDEFINED__) || \
defined(ENABLE_UBSAN)
#define MDBX_UNALIGNED_OK 0 /* no unaligned access allowed */
#elif defined(__ARM_FEATURE_UNALIGNED)
#define MDBX_UNALIGNED_OK 4 /* ok unaligned for 32-bit words */
#elif __CLANG_PREREQ(5, 0) || __GNUC_PREREQ(5, 0)
/* expecting an optimization will well done, also this
* hushes false-positives from UBSAN (undefined behaviour sanitizer) */
#define MDBX_UNALIGNED_OK 0
#elif defined(__e2k__) || defined(__elbrus__)
#if __iset__ > 4
#define MDBX_UNALIGNED_OK 8 /* ok unaligned for 64-bit words */
@ -386,6 +383,10 @@
#endif
#elif defined(__ia32__)
#define MDBX_UNALIGNED_OK 8 /* ok unaligned for 64-bit words */
#elif __CLANG_PREREQ(5, 0) || __GNUC_PREREQ(5, 0)
/* expecting an optimization will well done, also this
* hushes false-positives from UBSAN (undefined behaviour sanitizer) */
#define MDBX_UNALIGNED_OK 0
#else
#define MDBX_UNALIGNED_OK 0 /* no unaligned access allowed */
#endif