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authorRichard Henderson <rth@twiddle.net>2014-06-25 12:27:16 -0700
committerRichard Henderson <rth@twiddle.net>2014-07-03 08:38:25 -0700
commit428dd03f5a7291d19f0c45fc314da9356ee22d63 (patch)
tree35017b916f4ebeebf563364be5c07cdee6902a4e /sysdeps/i386
parentc39323e9d2fb6697d5d8739ad9b7959c88a6d5a1 (diff)
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Remove HP_TIMING_DIFF_INIT and dl_hp_timing_overhead
Without HP_TIMING_ACCUM, dl_hp_timing_overhead is write-only. If we remove it, there's no point in HP_TIMING_DIFF_INIT either.
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/i686/Makefile5
-rw-r--r--sysdeps/i386/i686/hp-timing.c23
-rw-r--r--sysdeps/i386/i686/hp-timing.h22
3 files changed, 0 insertions, 50 deletions
diff --git a/sysdeps/i386/i686/Makefile b/sysdeps/i386/i686/Makefile
index 01c2917..5ce9fc6 100644
--- a/sysdeps/i386/i686/Makefile
+++ b/sysdeps/i386/i686/Makefile
@@ -1,8 +1,3 @@
-ifeq ($(subdir),csu)
-sysdep_routines += hp-timing
-elide-routines.os += hp-timing
-endif
-
# So that we can test __m128's alignment
stack-align-test-flags += -msse
diff --git a/sysdeps/i386/i686/hp-timing.c b/sysdeps/i386/i686/hp-timing.c
deleted file mode 100644
index faa6dad..0000000
--- a/sysdeps/i386/i686/hp-timing.c
+++ /dev/null
@@ -1,23 +0,0 @@
-/* Support for high precision, low overhead timing functions. i686 version.
- Copyright (C) 1998-2014 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
-
- 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 <hp-timing.h>
-
-/* We have to define the variable for the overhead. */
-hp_timing_t _dl_hp_timing_overhead;
diff --git a/sysdeps/i386/i686/hp-timing.h b/sysdeps/i386/i686/hp-timing.h
index a4b19c1..12c613e 100644
--- a/sysdeps/i386/i686/hp-timing.h
+++ b/sysdeps/i386/i686/hp-timing.h
@@ -52,9 +52,6 @@
- HP_TIMING_NOW: place timestamp for current time in variable given as
parameter.
- - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
- HP_TIMING_DIFF macro.
-
- HP_TIMING_DIFF: compute difference between two times and store it
in a third. Source and destination might overlap.
@@ -83,25 +80,6 @@ typedef unsigned long long int hp_timing_t;
in accurate clock cycles here so we don't do this. */
#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rdtsc" : "=A" (Var))
-/* Use two 'rdtsc' instructions in a row to find out how long it takes. */
-#define HP_TIMING_DIFF_INIT() \
- do { \
- if (GLRO(dl_hp_timing_overhead) == 0) \
- { \
- int __cnt = 5; \
- GLRO(dl_hp_timing_overhead) = ~0ull; \
- do \
- { \
- hp_timing_t __t1, __t2; \
- HP_TIMING_NOW (__t1); \
- HP_TIMING_NOW (__t2); \
- if (__t2 - __t1 < GLRO(dl_hp_timing_overhead)) \
- GLRO(dl_hp_timing_overhead) = __t2 - __t1; \
- } \
- while (--__cnt > 0); \
- } \
- } while (0)
-
/* It's simple arithmetic for us. */
#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start))