Current File : //glibc-2.29/sysdeps/x86_64/multiarch/sched_cpucount.c
/* Count bits in CPU set. x86-64 multi-arch version.
This file is part of the GNU C Library.
Copyright (C) 2008-2019 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@redhat.com>.
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
<http://www.gnu.org/licenses/>. */
#include <sched.h>
#include "init-arch.h"
#define __sched_cpucount static generic_cpucount
#include <posix/sched_cpucount.c>
#undef __sched_cpucount
#define POPCNT(l) \
({ __cpu_mask r; \
asm ("popcnt %1, %0" : "=r" (r) : "0" (l));\
r; })
#define __sched_cpucount static popcount_cpucount
#include <posix/sched_cpucount.c>
#undef __sched_cpucount
libc_ifunc (__sched_cpucount,
HAS_CPU_FEATURE (POPCNT) ? popcount_cpucount : generic_cpucount);
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