diff options
Diffstat (limited to 'contrib/syslinux/syslinux-4.03/com32/include/ilog2.h')
-rw-r--r-- | contrib/syslinux/syslinux-4.03/com32/include/ilog2.h | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/contrib/syslinux/syslinux-4.03/com32/include/ilog2.h b/contrib/syslinux/syslinux-4.03/com32/include/ilog2.h deleted file mode 100644 index 91a5057..0000000 --- a/contrib/syslinux/syslinux-4.03/com32/include/ilog2.h +++ /dev/null @@ -1,48 +0,0 @@ -/* ----------------------------------------------------------------------- * - * - * Copyright 2010 Intel Corporation; author: H. Peter Anvin - * - * Permission is hereby granted, free of charge, to any person - * obtaining a copy of this software and associated documentation - * files (the "Software"), to deal in the Software without - * restriction, including without limitation the rights to use, - * copy, modify, merge, publish, distribute, sublicense, and/or - * sell copies of the Software, and to permit persons to whom - * the Software is furnished to do so, subject to the following - * conditions: - * - * The above copyright notice and this permission notice shall - * be included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES - * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR - * OTHER DEALINGS IN THE SOFTWARE. - * - * ----------------------------------------------------------------------- */ - -#ifndef _ILOG2_H -#define _ILOG2_H - -/* - * Computes floor(log2(x)) -- undefined for x = 0. - */ - -#include <klibc/compiler.h> -#include <stdint.h> - -static inline __constfunc uint32_t ilog2(uint32_t __v) -{ -# if __GNUC__ >= 4 - return __builtin_clz(__v) ^ 31; -# else - asm("bsrl %1,%0" : "=r" (__v) : "rm" (__v)); - return __v; -# endif -} - -#endif /* _ILOG2_H */ |