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82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/* High precision, low overhead timing functions. sparc64 version.
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Copyright (C) 2001-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David S. Miller <davem@redhat.com>, 2001.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _HP_TIMING_H
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#define _HP_TIMING_H 1
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#include <string.h>
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#include <sys/param.h>
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#include <_itoa.h>
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#define HP_TIMING_AVAIL (1)
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#define HP_TIMING_INLINE (1)
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typedef unsigned long int hp_timing_t;
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#define HP_TIMING_ZERO(Var) (Var) = (0)
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#define HP_TIMING_NOW(Var) __asm__ __volatile__ ("rd %%tick, %0" : "=r" (Var))
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#define HP_TIMING_DIFF_INIT() \
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do { \
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int __cnt = 5; \
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GLRO(dl_hp_timing_overhead) = ~0ull; \
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do \
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{ \
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hp_timing_t __t1, __t2; \
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HP_TIMING_NOW (__t1); \
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HP_TIMING_NOW (__t2); \
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if (__t2 - __t1 < GLRO(dl_hp_timing_overhead)) \
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GLRO(dl_hp_timing_overhead) = __t2 - __t1; \
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} \
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while (--__cnt > 0); \
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} while (0)
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#define HP_TIMING_DIFF(Diff, Start, End) (Diff) = ((End) - (Start))
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#define HP_TIMING_ACCUM(Sum, Diff) \
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do { \
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hp_timing_t __diff = (Diff) - GLRO(dl_hp_timing_overhead); \
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hp_timing_t tmp1, tmp2; \
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__asm__ __volatile__("1: ldx [%3], %0\n\t" \
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"add %0, %2, %1\n\t" \
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"casx [%3], %0, %1\n\t" \
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"cmp %0, %1\n\t" \
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"bne,pn %%xcc, 1b\n\t" \
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" nop" \
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: "=&r" (tmp1), "=&r" (tmp2) \
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: "r" (__diff), "r" (&(Sum)) \
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: "memory", "g1", "g5", "g6"); \
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} while(0)
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#define HP_TIMING_ACCUM_NT(Sum, Diff) (Sum) += (Diff)
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#define HP_TIMING_PRINT(Buf, Len, Val) \
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do { \
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char __buf[20]; \
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char *__cp = _itoa (Val, __buf + sizeof (__buf), 10, 0); \
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int __len = (Len); \
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char *__dest = (Buf); \
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while (__len-- > 0 && __cp < __buf + sizeof (__buf)) \
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*__dest++ = *__cp++; \
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memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles"))); \
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} while (0)
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#endif /* hp-timing.h */
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