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| author | Ulrich Drepper <drepper@redhat.com> | 2007-06-08 19:23:19 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-06-08 19:23:19 +0000 |
| commit | 36dffb2256f4ad8fa45feaf0617d8c5570a92cdb (patch) | |
| tree | c51054851ca82b4bc708c71252d8ba36ebbc5f51 /sysdeps | |
| parent | 7d0e41cebe87f807c70c65b9b8cb001edca66465 (diff) | |
| download | glibc-36dffb2256f4ad8fa45feaf0617d8c5570a92cdb.tar.gz glibc-36dffb2256f4ad8fa45feaf0617d8c5570a92cdb.tar.xz glibc-36dffb2256f4ad8fa45feaf0617d8c5570a92cdb.zip | |
* posix/sched_cpucount.c (__sched_cpucount): Allow using special
instruction for counting bits. * sysdeps/x86_64/sched_cpucount.c: New file.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/x86_64/sched_cpucount.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sysdeps/x86_64/sched_cpucount.c b/sysdeps/x86_64/sched_cpucount.c new file mode 100644 index 0000000000..63d84a62e8 --- /dev/null +++ b/sysdeps/x86_64/sched_cpucount.c @@ -0,0 +1,26 @@ +/* Copyright (C) 2007 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. */ + +#ifdef __amdfam10 +# define POPCNT(l) \ + ({ __cpu_mask r; \ + asm ("popcntq %1, %0" : "=r" (r) : "0" (l)); \ + r; }) +#endif + +#include <posix/sched_cpucount.c> |