sysdeps/sparc/sparc64/hp-timing.h

   1 /* High precision, low overhead timing functions.  sparc64 version.
   2    Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by David S. Miller <davem@redhat.com>, 2001.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #ifndef _HP_TIMING_H
  22 #define _HP_TIMING_H    1
  23
  24 #include <string.h>
  25 #include <sys/param.h>
  26 #include <stdio-common/_itoa.h>
  27
  28 #define HP_TIMING_AVAIL         (1)
  29 #define HP_TIMING_INLINE        (1)
  30
  31 typedef unsigned long int hp_timing_t;
  32
  33 #define HP_TIMING_ZERO(Var)     (Var) = (0)
  34
  35 #define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rd %%tick, %0" : "=r" (Var))
  36
  37 #define HP_TIMING_DIFF_INIT() \
  38   do {                                                                        \
  39     int __cnt = 5;                                                            \
  40     GLRO(dl_hp_timing_overhead) = ~0ull;                                      \
  41     do                                                                        \
  42       {                                                                       \
  43         hp_timing_t __t1, __t2;                                               \
  44         HP_TIMING_NOW (__t1);                                                 \
  45         HP_TIMING_NOW (__t2);                                                 \
  46         if (__t2 - __t1 < GLRO(dl_hp_timing_overhead))                        \
  47           GLRO(dl_hp_timing_overhead) = __t2 - __t1;                          \
  48       }                                                                       \
  49     while (--__cnt > 0);                                                      \
  50   } while (0)
  51
  52 #define HP_TIMING_DIFF(Diff, Start, End)        (Diff) = ((End) - (Start))
  53
  54 #define HP_TIMING_ACCUM(Sum, Diff)                              \
  55 do {                                                            \
  56   hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead);    \
  57   hp_timing_t tmp1, tmp2;                                       \
  58   __asm__ __volatile__("1: ldx  [%3], %0\n\t"                   \
  59                        "add     %0, %2, %1\n\t"                 \
  60                        "casx    [%3], %0,  %1\n\t"              \
  61                        "cmp     %0, %1\n\t"                     \
  62                        "bne,pn  %%xcc, 1b\n\t"                  \
  63                        " nop"                                   \
  64                        : "=&r" (tmp1), "=&r" (tmp2)             \
  65                        : "r" (__diff), "r" (&(Sum))             \
  66                        : "memory", "g1", "g5", "g6");           \
  67 } while(0)
  68
  69 #define HP_TIMING_ACCUM_NT(Sum, Diff)   (Sum) += (Diff)
  70
  71 #define HP_TIMING_PRINT(Buf, Len, Val) \
  72   do {                                                                        \
  73     char __buf[20];                                                           \
  74     char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0);                  \
  75     int __len = (Len);                                                        \
  76     char *__dest = (Buf);                                                     \
  77     while (__len-- > 0 && __cp < __buf + sizeof (__buf))                      \
  78       *__dest++ = *__cp++;                                                    \
  79     memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles")));  \
  80   } while (0)
  81
  82 #endif  /* hp-timing.h */