diff options
Diffstat (limited to 'fallback_builtins.h')
| -rw-r--r-- | fallback_builtins.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fallback_builtins.h b/fallback_builtins.h index 314ad32..afa5870 100644 --- a/fallback_builtins.h +++ b/fallback_builtins.h @@ -14,7 +14,9 @@ */ static __forceinline unsigned long __builtin_ctz(uint32_t value) { #ifdef X86_FEATURES +# ifndef X86_NOCHECK_TZCNT if (x86_cpu_has_tzcnt) +# endif return _tzcnt_u32(value); #endif unsigned long trailing_zero; @@ -29,7 +31,9 @@ static __forceinline unsigned long __builtin_ctz(uint32_t value) { */ static __forceinline unsigned long long __builtin_ctzll(uint64_t value) { #ifdef X86_FEATURES +# ifndef X86_NOCHECK_TZCNT if (x86_cpu_has_tzcnt) +# endif return _tzcnt_u64(value); #endif unsigned long trailing_zero; |