From 3430ed09d3bef58dbf3fe18d87716236883599d8 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Sun, 9 Feb 2020 11:01:39 +0100 Subject: x86: Remove and use the generic version Particularly on CPUs without ERMS, the string instructions are slow, so it is unclear whether this architecture-specific implementation is in fact an optimization. --- sysdeps/x86/bits/select.h | 63 ----------------------------------------------- 1 file changed, 63 deletions(-) delete mode 100644 sysdeps/x86/bits/select.h diff --git a/sysdeps/x86/bits/select.h b/sysdeps/x86/bits/select.h deleted file mode 100644 index b2e3ac800a..0000000000 --- a/sysdeps/x86/bits/select.h +++ /dev/null @@ -1,63 +0,0 @@ -/* Copyright (C) 1997-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#ifndef _SYS_SELECT_H -# error "Never use directly; include instead." -#endif - -#include - - -#if defined __GNUC__ && __GNUC__ >= 2 - -# if __WORDSIZE == 64 -# define __FD_ZERO_STOS "stosq" -# else -# define __FD_ZERO_STOS "stosl" -# endif - -# define __FD_ZERO(fdsp) \ - do { \ - int __d0, __d1; \ - __asm__ __volatile__ ("cld; rep; " __FD_ZERO_STOS \ - : "=c" (__d0), "=D" (__d1) \ - : "a" (0), "0" (sizeof (fd_set) \ - / sizeof (__fd_mask)), \ - "1" (&__FDS_BITS (fdsp)[0]) \ - : "memory"); \ - } while (0) - -#else /* ! GNU CC */ - -/* We don't use `memset' because this would require a prototype and - the array isn't too big. */ -# define __FD_ZERO(set) \ - do { \ - unsigned int __i; \ - fd_set *__arr = (set); \ - for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) \ - __FDS_BITS (__arr)[__i] = 0; \ - } while (0) - -#endif /* GNU CC */ - -#define __FD_SET(d, set) \ - ((void) (__FDS_BITS (set)[__FD_ELT (d)] |= __FD_MASK (d))) -#define __FD_CLR(d, set) \ - ((void) (__FDS_BITS (set)[__FD_ELT (d)] &= ~__FD_MASK (d))) -#define __FD_ISSET(d, set) \ - ((__FDS_BITS (set)[__FD_ELT (d)] & __FD_MASK (d)) != 0) -- cgit 1.4.1