diff options
| author | Stefan Liebler <stli@linux.ibm.com> | 2019-09-18 16:09:54 +0200 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-09-18 16:09:54 +0200 |
| commit | 2b680878669e0a7086924de08f60a0747df0029f (patch) | |
| tree | fc0f6f7500586e7d971a8218b54efdbce5d69d9a | |
| parent | 8cacbcf4a984ccac24efedb795d9c8a7f149d17b (diff) | |
| download | glibc-2b680878669e0a7086924de08f60a0747df0029f.tar.gz glibc-2b680878669e0a7086924de08f60a0747df0029f.tar.xz glibc-2b680878669e0a7086924de08f60a0747df0029f.zip | |
S390: Add support for HP_TIMING_NOW.
This patch adds support for HP_TIMING_NOW if we build at least with -march=z10 -mzarch. Otherwise we are still using the generic hp-timing.h. ChangeLog: * sysdeps/s390/hp-timing.h: New file.
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | sysdeps/s390/hp-timing.h | 42 |
2 files changed, 46 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 2258e1cbb8..a2baa8e419 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2019-09-18 Stefan Liebler <stli@linux.ibm.com> + + * sysdeps/s390/hp-timing.h: New file. + 2019-09-18 Joseph Myers <joseph@codesourcery.com> * sysdeps/unix/sysv/linux/riscv/vfork.S: Do not include diff --git a/sysdeps/s390/hp-timing.h b/sysdeps/s390/hp-timing.h new file mode 100644 index 0000000000..793fb66a4d --- /dev/null +++ b/sysdeps/s390/hp-timing.h @@ -0,0 +1,42 @@ +/* High precision, low overhead timing functions. s390 version. + Copyright (C) 2019 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _HP_TIMING_H + +/* The stckf instruction is available starting with z9-109 zarch CPUs. + As there is no extra configure check for z9-109, the z10 one is used. */ +#ifdef HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT +# define _HP_TIMING_H 1 +# include <hp-timing-common.h> + +/* We use 64 bit values for the times. + Note: Bit 51 is incremented every 0.000 001s = 1us. */ +typedef unsigned long long int hp_timing_t; + +# define HP_TIMING_INLINE (1) + +# define HP_TIMING_NOW(VAR) \ + do { \ + __asm__ __volatile__ ("stckf %0" : "=Q" (VAR) : : "cc"); \ + } while (0) + +#else +# include_next <hp-timing.h> +#endif + +#endif /* hp-timing.h */ |