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authorRichard Henderson <rth@twiddle.net>2014-06-25 13:58:59 -0700
committerRichard Henderson <rth@twiddle.net>2014-07-03 08:38:30 -0700
commit86e1a7ff92df1589a3a0e0dd44ef2d861e307620 (patch)
tree4d4d60aeed7a88a42ac04f5e0867fc76b832d84f /sysdeps/i386
parent428dd03f5a7291d19f0c45fc314da9356ee22d63 (diff)
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Unify hp-timing implementations
Provide an hp-timing-common.h for ports to use.
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/i686/hp-timing.h61
1 files changed, 1 insertions, 60 deletions
diff --git a/sysdeps/i386/i686/hp-timing.h b/sysdeps/i386/i686/hp-timing.h
index 12c613e..512efc5 100644
--- a/sysdeps/i386/i686/hp-timing.h
+++ b/sysdeps/i386/i686/hp-timing.h
@@ -20,50 +20,6 @@
#ifndef _HP_TIMING_H
#define _HP_TIMING_H 1
-#include <string.h>
-#include <sys/param.h>
-#include <_itoa.h>
-
-/* The macros defined here use the timestamp counter in i586 and up versions
- of the x86 processors. They provide a very accurate way to measure the
- time with very little overhead. The time values themself have no real
- meaning, only differences are interesting.
-
- This version is for the i686 processors. The difference to the i586
- version is that the timerstamp register is unconditionally used. This is
- not the case for the i586 version where we have to perform runtime test
- whether the processor really has this capability. We have to make this
- distinction since the sysdeps/i386/i586 code is supposed to work on all
- platforms while the i686 already contains i686-specific code.
-
- The list of macros we need includes the following:
-
- - HP_TIMING_AVAIL: test for availability.
-
- - HP_TIMING_INLINE: this macro is non-zero if the functionality is not
- implemented using function calls but instead uses some inlined code
- which might simply consist of a few assembler instructions. We have to
- know this since we might want to use the macros here in places where we
- cannot make function calls.
-
- - hp_timing_t: This is the type for variables used to store the time
- values.
-
- - HP_TIMING_NOW: place timestamp for current time in variable given as
- parameter.
-
- - HP_TIMING_DIFF: compute difference between two times and store it
- in a third. Source and destination might overlap.
-
- - HP_TIMING_ACCUM_NT: add time difference to another variable, without
- being thread-safe.
-
- - HP_TIMING_PRINT: write decimal representation of the timing value into
- the given string. This operation need not be inline even though
- HP_TIMING_INLINE is specified.
-
-*/
-
/* We always assume having the timestamp register. */
#define HP_TIMING_AVAIL (1)
@@ -80,21 +36,6 @@ 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))
-/* It's simple arithmetic for us. */
-#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start))
-
-#define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff)
-
-/* Print the time value. */
-#define HP_TIMING_PRINT(Buf, Len, Val) \
- do { \
- char __buf[20]; \
- char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0); \
- size_t __len = (Len); \
- char *__dest = (Buf); \
- while (__len-- > 0 && __cp < __buf + sizeof (__buf)) \
- *__dest++ = *__cp++; \
- memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles"))); \
- } while (0)
+#include <hp-timing-common.h>
#endif /* hp-timing.h */