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mdbx: add MDBX_HAVE_CMOV macro/option.

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Леонид Юрьев (Leonid Yuriev) 2022-07-24 17:31:38 +03:00
parent 262fafd00e
commit fe6c6b2068
1 changed files with 27 additions and 0 deletions
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27
src/base.h
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@ -375,6 +375,33 @@ __extern_C key_t ftok(const char *, int);
#endif
#endif /* __BYTE_ORDER__ || __ORDER_LITTLE_ENDIAN__ || __ORDER_BIG_ENDIAN__ */
/*----------------------------------------------------------------------------*/
/* Availability of CMOV or equivalent */
#ifndef MDBX_HAVE_CMOV
#if defined(__e2k__)
#define MDBX_HAVE_CMOV 1
#elif defined(__thumb2__) || defined(__thumb2)
#define MDBX_HAVE_CMOV 1
#elif defined(__thumb__) || defined(__thumb) || defined(__TARGET_ARCH_THUMB)
#define MDBX_HAVE_CMOV 0
#elif defined(_M_ARM) || defined(_M_ARM64) || defined(__aarch64__) || \
defined(__aarch64) || defined(__arm__) || defined(__arm) || \
defined(__CC_ARM)
#define MDBX_HAVE_CMOV 1
#elif (defined(__riscv__) || defined(__riscv64)) && \
(defined(__riscv_b) || defined(__riscv_bitmanip))
#define MDBX_HAVE_CMOV 1
#elif defined(i686) || defined(__i686) || defined(__i686__) || \
(defined(_M_IX86) && _M_IX86 > 600) || defined(__x86_64) || \
defined(__x86_64__) || defined(__amd64__) || defined(__amd64) || \
defined(_M_X64) || defined(_M_AMD64)
#define MDBX_HAVE_CMOV 1
#else
#define MDBX_HAVE_CMOV 0
#endif
#endif /* MDBX_HAVE_CMOV */
/*----------------------------------------------------------------------------*/
/* Compiler's includes for builtins/intrinsics */