1 /* Copyright (C) 2009-2014 Free Software Foundation, Inc. 2 3 This file is part of GCC. 4 5 GCC is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3, or (at your option) 8 any later version. 9 10 GCC is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 Under Section 7 of GPL version 3, you are granted additional 16 permissions described in the GCC Runtime Library Exception, version 17 3.1, as published by the Free Software Foundation. 18 19 You should have received a copy of the GNU General Public License and 20 a copy of the GCC Runtime Library Exception along with this program; 21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 22 <http://www.gnu.org/licenses/>. */ 23 24 #if !defined _X86INTRIN_H_INCLUDED && !defined _IMMINTRIN_H_INCLUDED 25 # error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead." 26 #endif 27 28 29 #ifndef _LZCNTINTRIN_H_INCLUDED 30 #define _LZCNTINTRIN_H_INCLUDED 31 32 #ifndef __LZCNT__ 33 #pragma GCC push_options 34 #pragma GCC target("lzcnt") 35 #define __DISABLE_LZCNT__ 36 #endif /* __LZCNT__ */ 37 38 extern __inline unsigned short __attribute__((__gnu_inline__, __always_inline__, __artificial__)) 39 __lzcnt16 (unsigned short __X) 40 { 41 return __builtin_clzs (__X); 42 } 43 44 extern __inline unsigned int __attribute__((__gnu_inline__, __always_inline__, __artificial__)) 45 __lzcnt32 (unsigned int __X) 46 { 47 return __builtin_clz (__X); 48 } 49 50 extern __inline unsigned int __attribute__((__gnu_inline__, __always_inline__, __artificial__)) 51 _lzcnt_u32 (unsigned int __X) 52 { 53 return __builtin_clz (__X); 54 } 55 56 #ifdef __x86_64__ 57 extern __inline unsigned long long __attribute__((__gnu_inline__, __always_inline__, __artificial__)) 58 __lzcnt64 (unsigned long long __X) 59 { 60 return __builtin_clzll (__X); 61 } 62 63 extern __inline unsigned long long __attribute__((__gnu_inline__, __always_inline__, __artificial__)) 64 _lzcnt_u64 (unsigned long long __X) 65 { 66 return __builtin_clzll (__X); 67 } 68 #endif 69 70 #ifdef __DISABLE_LZCNT__ 71 #undef __DISABLE_LZCNT__ 72 #pragma GCC pop_options 73 #endif /* __DISABLE_LZCNT__ */ 74 75 #endif /* _LZCNTINTRIN_H_INCLUDED */ 76
