diff options
| author | Chris Robinson <[email protected]> | 2020-08-13 14:04:29 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2020-08-13 14:04:29 -0700 |
| commit | 8e7199cbb60a4682a3d4c28d5746c1890c40e983 (patch) | |
| tree | 7344fb64ad696c0f1252c8d0e06ad3305fd9b9f5 /common/alnumeric.h | |
| parent | fd52c828a9c4f4bb7ed3a4dcfe4a5b4ed5664246 (diff) | |
Avoid a cmake check for determining the size of long
Diffstat (limited to 'common/alnumeric.h')
| -rw-r--r-- | common/alnumeric.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/common/alnumeric.h b/common/alnumeric.h index df05b966..61bfff8b 100644 --- a/common/alnumeric.h +++ b/common/alnumeric.h @@ -96,15 +96,27 @@ inline size_t RoundUp(size_t value, size_t r) noexcept */ #ifdef __GNUC__ +template<typename T> +struct NumericDetail64 { }; +template<> +struct NumericDetail64<unsigned long long> { + constexpr static inline auto popcnt64(unsigned long long val) noexcept + { return __builtin_popcountll(val); } + constexpr static inline auto ctz64(unsigned long long val) noexcept + { return __builtin_ctzll(val); } +}; +template<> +struct NumericDetail64<unsigned long> { + constexpr static inline auto popcnt64(unsigned long val) noexcept + { return __builtin_popcountl(val); } + constexpr static inline auto ctz64(unsigned long val) noexcept + { return __builtin_ctzl(val); } +}; + #define POPCNT32 __builtin_popcount #define CTZ32 __builtin_ctz -#if SIZEOF_LONG == 8 -#define POPCNT64 __builtin_popcountl -#define CTZ64 __builtin_ctzl -#else -#define POPCNT64 __builtin_popcountll -#define CTZ64 __builtin_ctzll -#endif +#define POPCNT64 NumericDetail64<uint64_t>::popcnt64 +#define CTZ64 NumericDetail64<uint64_t>::ctz64 #else |