High-preicion timer access code for 32-bit UltraSPARC III.
authordrepper <drepper>
Tue, 10 Apr 2001 00:10:14 +0000 (00:10 +0000)
committerdrepper <drepper>
Tue, 10 Apr 2001 00:10:14 +0000 (00:10 +0000)
sysdeps/sparc/sparc32/sparcv9/hp-timing.h [new file with mode: 0644]

diff --git a/sysdeps/sparc/sparc32/sparcv9/hp-timing.h b/sysdeps/sparc/sparc32/sparcv9/hp-timing.h
new file mode 100644 (file)
index 0000000..98acae9
--- /dev/null
@@ -0,0 +1,89 @@
+/* High precision, low overhead timing functions.  sparcv9 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 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, %L0\n\t" \
+                           "srlx %L0, 32, %H0" \
+                           : "=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;     \
+  __asm__ __volatile__("srl    %L0, 0, %%g1\n\t"               \
+                      "sllx    %H0, 32, %%g7\n\t"              \
+                      "or      %%g1, %%g7, %%g1\n\t"           \
+                      "1: ldx  [%1], %%g5\n\t"                 \
+                      "add     %%g5, %%g1, %%g7\n\t"           \
+                      "casx    [%1], %%g5,  %%g7\n\t"          \
+                      "cmp     %%g5, %%g7\n\t"                 \
+                      "bne,pn  %%xcc, 1b\n\t"                  \
+                      " nop"                                   \
+                      : /* no outputs */                       \
+                      : "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 */