From 428dd03f5a7291d19f0c45fc314da9356ee22d63 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Wed, 25 Jun 2014 12:27:16 -0700
Subject: 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.
---
sysdeps/i386/i686/Makefile | 5 -----
sysdeps/i386/i686/hp-timing.c | 23 -----------------------
sysdeps/i386/i686/hp-timing.h | 22 ----------------------
3 files changed, 50 deletions(-)
delete mode 100644 sysdeps/i386/i686/hp-timing.c
(limited to 'sysdeps/i386')
diff --git a/sysdeps/i386/i686/Makefile b/sysdeps/i386/i686/Makefile
index 01c2917892..5ce9fc670a 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 faa6dadd0a..0000000000
--- 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 a4b19c1043..12c613e9de 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))
--
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