* sysdeps/x86_64/bits/select.h: New file.

1 files changed, 78 insertions, 0 deletions

diff --git a/sysdeps/x86_64/bits/select.h b/sysdeps/x86_64/bits/select.h
new file mode 100644
index 0000000000..c217c2615a
--- /dev/null
+++ b/sysdeps/x86_64/bits/select.h
@@ -0,0 +1,78 @@
+/* Copyright (C) 1997, 1998, 1999, 2001, 2008 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _SYS_SELECT_H
+# error "Never use <bits/select.h> directly; include <sys/select.h> instead."
+#endif
+
+
+#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)
+
+# define __FD_SET(fd, fdsp) \
+  __asm__ __volatile__ ("btsl %1,%0"					      \
+			: "=m" (__FDS_BITS (fdsp)[__FDELT (fd)])	      \
+			: "r" (((int) (fd)) % __NFDBITS)		      \
+			: "cc","memory")
+# define __FD_CLR(fd, fdsp) \
+  __asm__ __volatile__ ("btrl %1,%0"					      \
+			: "=m" (__FDS_BITS (fdsp)[__FDELT (fd)])	      \
+			: "r" (((int) (fd)) % __NFDBITS)		      \
+			: "cc","memory")
+# define __FD_ISSET(fd, fdsp) \
+  (__extension__							      \
+   ({register char __result;						      \
+     __asm__ __volatile__ ("btl %1,%2 ; setcb %b0"			      \
+			   : "=q" (__result)				      \
+			   : "r" (((int) (fd)) % __NFDBITS),		      \
+			     "m" (__FDS_BITS (fdsp)[__FDELT (fd)])	      \
+			   : "cc");					      \
+     __result; }))
+
+#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)
+# define __FD_SET(d, set)    (__FDS_BITS (set)[__FDELT (d)] |= __FDMASK (d))
+# define __FD_CLR(d, set)    (__FDS_BITS (set)[__FDELT (d)] &= ~__FDMASK (d))
+# define __FD_ISSET(d, set)  (__FDS_BITS (set)[__FDELT (d)] & __FDMASK (d))
+
+#endif	/* GNU CC */