diff options
Diffstat (limited to 'clang')
| -rw-r--r-- | clang/lib/Headers/bmiintrin.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/clang/lib/Headers/bmiintrin.h b/clang/lib/Headers/bmiintrin.h index dc2f83f3e2d..da98792d830 100644 --- a/clang/lib/Headers/bmiintrin.h +++ b/clang/lib/Headers/bmiintrin.h @@ -39,7 +39,12 @@ /* Define the default attributes for the functions in this file. */ #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("bmi"))) -static __inline__ unsigned short __DEFAULT_FN_ATTRS +/* Allow using the tzcnt intrinsics even for non-BMI targets. Since the TZCNT + instruction behaves as BSF on non-BMI targets, there is code that expects + to use it as a potentially faster version of BSF. */ +#define __RELAXED_FN_ATTRS __attribute__((__always_inline__, __nodebug__)) + +static __inline__ unsigned short __RELAXED_FN_ATTRS __tzcnt_u16(unsigned short __X) { return __X ? __builtin_ctzs(__X) : 16; @@ -83,7 +88,7 @@ __blsr_u32(unsigned int __X) return __X & (__X - 1); } -static __inline__ unsigned int __DEFAULT_FN_ATTRS +static __inline__ unsigned int __RELAXED_FN_ATTRS __tzcnt_u32(unsigned int __X) { return __X ? __builtin_ctz(__X) : 32; @@ -136,7 +141,7 @@ __blsr_u64(unsigned long long __X) return __X & (__X - 1); } -static __inline__ unsigned long long __DEFAULT_FN_ATTRS +static __inline__ unsigned long long __RELAXED_FN_ATTRS __tzcnt_u64(unsigned long long __X) { return __X ? __builtin_ctzll(__X) : 64; @@ -145,5 +150,6 @@ __tzcnt_u64(unsigned long long __X) #endif /* __x86_64__ */ #undef __DEFAULT_FN_ATTRS +#undef __RELAXED_FN_ATTRS #endif /* __BMIINTRIN_H */ |
