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Diffstat (limited to 'sysdeps/sparc/sparc64/hp-timing.h')
| -rw-r--r-- | sysdeps/sparc/sparc64/hp-timing.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc64/hp-timing.h b/sysdeps/sparc/sparc64/hp-timing.h new file mode 100644 index 0000000000..761a416c0c --- /dev/null +++ b/sysdeps/sparc/sparc64/hp-timing.h @@ -0,0 +1,84 @@ +/* High precision, low overhead timing functions. sparc64 version. + Copyright (C) 2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@redhat.com>, 2001. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _HP_TIMING_H +#define _HP_TIMING_H 1 + +#include <string.h> +#include <sys/param.h> +#include <stdio-common/_itoa.h> + +#define HP_TIMING_AVAIL (1) +#define HP_TIMING_INLINE (1) + +typedef unsigned long int hp_timing_t; + +extern hp_timing_t __libc_hp_timing_overhead; + +#define HP_TIMING_ZERO(Var) (Var) = (0) + +#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rd %%tick, %0" : "=r" (Var)) + +#define HP_TIMING_DIFF_INIT() \ + do { \ + int __cnt = 5; \ + __libc_hp_timing_overhead = ~0ull; \ + do \ + { \ + hp_timing_t __t1, __t2; \ + HP_TIMING_NOW (__t1); \ + HP_TIMING_NOW (__t2); \ + if (__t2 - __t1 < __libc_hp_timing_overhead) \ + __libc_hp_timing_overhead = __t2 - __t1; \ + } \ + while (--__cnt > 0); \ + } while (0) + +#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start)) + +#define HP_TIMING_ACCUM(Sum, Diff) \ +do { \ + hp_timing_t __diff = (Diff) - __libc_hp_timing_overhead; \ + hp_timing_t tmp1, tmp2; \ + __asm__ __volatile__("1: ldx [%3], %0\n\t" \ + "add %0, %2, %1\n\t" \ + "casx [%3], %0, %1\n\t" \ + "cmp %0, %1\n\t" \ + "bne,pn %%xcc, 1b\n\t" \ + " nop" \ + : "=&r" (tmp1), "=&r" (tmp2) \ + : "r" (__diff), "r" (&(Sum)) \ + : "memory", "g1", "g5", "g7"); \ +} while(0) + +#define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff) + +#define HP_TIMING_PRINT(Buf, Len, Val) \ + do { \ + char __buf[20]; \ + char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0); \ + int __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) + +#endif /* hp-timing.h */ |