| lzcntintrin.h (234353) | lzcntintrin.h (280031) |
|---|---|
| 1/*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------=== 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: --- 21 unchanged lines hidden (view full) --- 30#endif /* __LZCNT__ */ 31 32#ifndef __LZCNTINTRIN_H 33#define __LZCNTINTRIN_H 34 35static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__)) 36__lzcnt16(unsigned short __X) 37{ | 1/*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------=== 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: --- 21 unchanged lines hidden (view full) --- 30#endif /* __LZCNT__ */ 31 32#ifndef __LZCNTINTRIN_H 33#define __LZCNTINTRIN_H 34 35static __inline__ unsigned short __attribute__((__always_inline__, __nodebug__)) 36__lzcnt16(unsigned short __X) 37{ |
| 38 return __builtin_clzs(__X); | 38 return __X ? __builtin_clzs(__X) : 16; |
| 39} 40 41static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__)) 42__lzcnt32(unsigned int __X) 43{ | 39} 40 41static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__)) 42__lzcnt32(unsigned int __X) 43{ |
| 44 return __builtin_clz(__X); | 44 return __X ? __builtin_clz(__X) : 32; |
| 45} 46 | 45} 46 |
| 47static __inline__ unsigned int __attribute__((__always_inline__, __nodebug__)) 48_lzcnt_u32(unsigned int __X) 49{ 50 return __X ? __builtin_clz(__X) : 32; 51} 52 |
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| 47#ifdef __x86_64__ 48static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__)) 49__lzcnt64(unsigned long long __X) 50{ | 53#ifdef __x86_64__ 54static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__)) 55__lzcnt64(unsigned long long __X) 56{ |
| 51 return __builtin_clzll(__X); | 57 return __X ? __builtin_clzll(__X) : 64; |
| 52} | 58} |
| 59 60static __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__)) 61_lzcnt_u64(unsigned long long __X) 62{ 63 return __X ? __builtin_clzll(__X) : 64; 64} |
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| 53#endif 54 55#endif /* __LZCNTINTRIN_H */ | 65#endif 66 67#endif /* __LZCNTINTRIN_H */ |