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Diffstat (limited to 'gcc/config/i386/lzcntintrin.h')
-rw-r--r-- | gcc/config/i386/lzcntintrin.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/gcc/config/i386/lzcntintrin.h b/gcc/config/i386/lzcntintrin.h new file mode 100644 index 0000000..4300811 --- /dev/null +++ b/gcc/config/i386/lzcntintrin.h @@ -0,0 +1,55 @@ +/* Copyright (C) 2009 Free Software Foundation, Inc. + + This file is part of GCC. + + GCC is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + GCC is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _X86INTRIN_H_INCLUDED +# error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead." +#endif + +#ifndef __LZCNT__ +# error "LZCNT instruction is not enabled" +#endif /* __LZCNT__ */ + +#ifndef _LZCNTINTRIN_H_INCLUDED +#define _LZCNTINTRIN_H_INCLUDED + +extern __inline unsigned short __attribute__((__gnu_inline__, __always_inline__, __artificial__)) +__lzcnt16 (unsigned short __X) +{ + return __builtin_clzs (__X); +} + +extern __inline unsigned int __attribute__((__gnu_inline__, __always_inline__, __artificial__)) +__lzcnt32 (unsigned int __X) +{ + return __builtin_clz (__X); +} + +#ifdef __x86_64__ +extern __inline unsigned long __attribute__((__gnu_inline__, __always_inline__, __artificial__)) +__lzcnt64 (unsigned long __X) +{ + return __builtin_clzl (__X); +} +#endif + +#endif /* _LZCNTINTRIN_H_INCLUDED */ |