1234287Sdim/*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------=== 2234287Sdim * 3234287Sdim * Permission is hereby granted, free of charge, to any person obtaining a copy 4234287Sdim * of this software and associated documentation files (the "Software"), to deal 5234287Sdim * in the Software without restriction, including without limitation the rights 6234287Sdim * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7234287Sdim * copies of the Software, and to permit persons to whom the Software is 8234287Sdim * furnished to do so, subject to the following conditions: 9234287Sdim * 10234287Sdim * The above copyright notice and this permission notice shall be included in 11234287Sdim * all copies or substantial portions of the Software. 12234287Sdim * 13234287Sdim * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14234287Sdim * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15234287Sdim * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16234287Sdim * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17234287Sdim * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18234287Sdim * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19234287Sdim * THE SOFTWARE. 20234287Sdim * 21234287Sdim *===-----------------------------------------------------------------------=== 22234287Sdim */ 23234287Sdim 24234287Sdim#if !defined __X86INTRIN_H && !defined __IMMINTRIN_H 25234287Sdim#error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead." 26234287Sdim#endif 27234287Sdim 28234287Sdim#ifndef __LZCNT__ 29234287Sdim# error "LZCNT instruction is not enabled" 30234287Sdim#endif /* __LZCNT__ */ 31234287Sdim 32234287Sdim#ifndef __LZCNTINTRIN_H 33234287Sdim#define __LZCNTINTRIN_H 34234287Sdim 35234287Sdimstatic __inline__ unsigned short __attribute__((__always_inline__, __nodebug__)) 36234287Sdim__lzcnt16(unsigned short __X) 37234287Sdim{ 38234287Sdim return __builtin_clzs(__X); 39234287Sdim} 40234287Sdim 41234287Sdimstatic __inline__ unsigned int __attribute__((__always_inline__, __nodebug__)) 42234287Sdim__lzcnt32(unsigned int __X) 43234287Sdim{ 44234287Sdim return __builtin_clz(__X); 45234287Sdim} 46234287Sdim 47234287Sdim#ifdef __x86_64__ 48234287Sdimstatic __inline__ unsigned long long __attribute__((__always_inline__, __nodebug__)) 49234287Sdim__lzcnt64(unsigned long long __X) 50234287Sdim{ 51234287Sdim return __builtin_clzll(__X); 52234287Sdim} 53234287Sdim#endif 54234287Sdim 55234287Sdim#endif /* __LZCNTINTRIN_H */ 56