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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/i686/hp-timing.h
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/i686/hp-timing.h')
-rw-r--r--sysdeps/i386/i686/hp-timing.h22
1 files changed, 0 insertions, 22 deletions
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))