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Improve platform detection, in particular MSVC ARM64

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This commit is contained in:
Michał Janiszewski 2019-10-24 21:59:41 +02:00 • committed by Nikolaj Bjorner
parent 907ffde577
commit 3feb1479c9
3 changed files with 13 additions and 7 deletions
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12
src/util/mpz.cpp
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@ -46,18 +46,17 @@ Revision History:
#define LEHMER_GCD
#endif
#ifdef _WINDOWS
#if defined(_WINDOWS) && !defined(_M_ARM) && !defined(_M_ARM64)
// This is needed for _tzcnt_u32 and friends.
#include <immintrin.h>
#define _trailing_zeros32(X) _tzcnt_u32(X)
#endif
#if defined(__GNUC__)
#define _trailing_zeros32(X) __builtin_ctz(X)
#else
#define _trailing_zeros32(X) _tzcnt_u32(X)
#endif
#if defined(__LP64__) || defined(_WIN64)
#if (defined(__LP64__) || defined(_WIN64)) && !defined(_M_ARM) && !defined(_M_ARM64)
#if defined(__GNUC__)
#define _trailing_zeros64(X) __builtin_ctzll(X)
#else
@ -69,6 +68,11 @@ inline uint64_t _trailing_zeros64(uint64_t x) {
for (; 0 == (x & 1) && r < 64; ++r, x >>= 1);
return r;
}
inline uint32_t _trailing_zeros32(uint32_t x) {
uint32_t r = 0;
for (; 0 == (x & 1) && r < 32; ++r, x >>= 1);
return r;
}
#endif