sysdeps/sparc/sparc32/sparcv9/hp-timing.h

   1 /* High precision, low overhead timing functions.  sparcv9 version.
   2    Copyright (C) 2001-2014 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef _HP_TIMING_H
  21 #define _HP_TIMING_H    1
  22
  23 #include <string.h>
  24 #include <sys/param.h>
  25 #include <_itoa.h>
  26
  27 #define HP_TIMING_AVAIL         (1)
  28 #define HP_TIMING_INLINE        (1)
  29
  30 typedef unsigned long long int hp_timing_t;
  31
  32 #define HP_TIMING_ZERO(Var)     (Var) = (0)
  33
  34 #define HP_TIMING_NOW(Var) \
  35       __asm__ __volatile__ ("rd %%tick, %L0\n\t" \
  36                             "srlx %L0, 32, %H0" \
  37                             : "=r" (Var))
  38
  39 #define HP_TIMING_DIFF_INIT() \
  40   do {                                                                        \
  41     int __cnt = 5;                                                            \
  42     GLRO(dl_hp_timing_overhead) = ~0ull;                                      \
  43     do                                                                        \
  44       {                                                                       \
  45         hp_timing_t __t1, __t2;                                               \
  46         HP_TIMING_NOW (__t1);                                                 \
  47         HP_TIMING_NOW (__t2);                                                 \
  48         if (__t2 - __t1 < GLRO(dl_hp_timing_overhead))                        \
  49           GLRO(dl_hp_timing_overhead) = __t2 - __t1;                          \
  50       }                                                                       \
  51     while (--__cnt > 0);                                                      \
  52   } while (0)
  53
  54 #define HP_TIMING_DIFF(Diff, Start, End)        (Diff) = ((End) - (Start))
  55
  56 #define HP_TIMING_ACCUM(Sum, Diff)                              \
  57 do {                                                            \
  58   hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead);    \
  59   __asm__ __volatile__("srl     %L0, 0, %%g1\n\t"               \
  60                        "sllx    %H0, 32, %%g6\n\t"              \
  61                        "or      %%g1, %%g6, %%g1\n\t"           \
  62                        "1: ldx  [%1], %%g5\n\t"                 \
  63                        "add     %%g5, %%g1, %%g6\n\t"           \
  64                        "casx    [%1], %%g5,  %%g6\n\t"          \
  65                        "cmp     %%g5, %%g6\n\t"                 \
  66                        "bne,pn  %%xcc, 1b\n\t"                  \
  67                        " nop"                                   \
  68                        : /* no outputs */                       \
  69                        : "r" (__diff), "r" (&(Sum))             \
  70                        : "memory", "g1", "g5", "g6");           \
  71 } while(0)
  72
  73 #define HP_TIMING_ACCUM_NT(Sum, Diff)   (Sum) += (Diff)
  74
  75 #define HP_TIMING_PRINT(Buf, Len, Val) \
  76   do {                                                                        \
  77     char __buf[20];                                                           \
  78     char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0);                  \
  79     int __len = (Len);                                                        \
  80     char *__dest = (Buf);                                                     \
  81     while (__len-- > 0 && __cp < __buf + sizeof (__buf))                      \
  82       *__dest++ = *__cp++;                                                    \
  83     memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles")));  \
  84   } while (0)
  85
  86 #endif  /* hp-timing.h */