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/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
   Contributed by Richard Henderson <rth@redhat.com>.
 
   This file is part of the GNU OpenMP Library (libgomp).
 
   Libgomp is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.
 
   Libgomp 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 General Public License for
   more details.
 
   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.
 
   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   <http://www.gnu.org/licenses/>.  */
 
/* This file handles the LOOP (FOR/DO) construct.  */
 
#include <limits.h>
#include <stdlib.h>
#include "libgomp.h"
 
typedef unsigned long long gomp_ull;
 
/* Initialize the given work share construct from the given arguments.  */
 
static inline void
gomp_loop_ull_init (struct gomp_work_share *ws, bool up, gomp_ull start,
                    gomp_ull end, gomp_ull incr, enum gomp_schedule_type sched,
                    gomp_ull chunk_size)
{
  ws->sched = sched;
  ws->chunk_size_ull = chunk_size;
  /* Canonicalize loops that have zero iterations to ->next == ->end.  */
  ws->end_ull = ((up && start > end) || (!up && start < end))
                ? start : end;
  ws->incr_ull = incr;
  ws->next_ull = start;
  ws->mode = 0;
  if (sched == GFS_DYNAMIC)
    {
      ws->chunk_size_ull *= incr;
 
#if defined HAVE_SYNC_BUILTINS && defined __LP64__
      {
        /* For dynamic scheduling prepare things to make each iteration
           faster.  */
        struct gomp_thread *thr = gomp_thread ();
        struct gomp_team *team = thr->ts.team;
        long nthreads = team ? team->nthreads : 1;
 
        if (__builtin_expect (up, 1))
          {
            /* Cheap overflow protection.  */
            if (__builtin_expect ((nthreads | ws->chunk_size_ull)
                                  < 1ULL << (sizeof (gomp_ull)
                                             * __CHAR_BIT__ / 2 - 1), 1))
              ws->mode = ws->end_ull < (__LONG_LONG_MAX__ * 2ULL + 1
                                        - (nthreads + 1) * ws->chunk_size_ull);
          }
        /* Cheap overflow protection.  */
        else if (__builtin_expect ((nthreads | -ws->chunk_size_ull)
                                   < 1ULL << (sizeof (gomp_ull)
                                              * __CHAR_BIT__ / 2 - 1), 1))
          ws->mode = ws->end_ull > ((nthreads + 1) * -ws->chunk_size_ull
                                    - (__LONG_LONG_MAX__ * 2ULL + 1));
      }
#endif
    }
  if (!up)
    ws->mode |= 2;
}
 
/* The *_start routines are called when first encountering a loop construct
   that is not bound directly to a parallel construct.  The first thread
   that arrives will create the work-share construct; subsequent threads
   will see the construct exists and allocate work from it.
 
   START, END, INCR are the bounds of the loop; due to the restrictions of
   OpenMP, these values must be the same in every thread.  This is not
   verified (nor is it entirely verifiable, since START is not necessarily
   retained intact in the work-share data structure).  CHUNK_SIZE is the
   scheduling parameter; again this must be identical in all threads.
 
   Returns true if there's any work for this thread to perform.  If so,
   *ISTART and *IEND are filled with the bounds of the iteration block
   allocated to this thread.  Returns false if all work was assigned to
   other threads prior to this thread's arrival.  */
 
static bool
gomp_loop_ull_static_start (bool up, gomp_ull start, gomp_ull end,
                            gomp_ull incr, gomp_ull chunk_size,
                            gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
 
  thr->ts.static_trip = 0;
  if (gomp_work_share_start (false))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_STATIC, chunk_size);
      gomp_work_share_init_done ();
    }
 
  return !gomp_iter_ull_static_next (istart, iend);
}
 
static bool
gomp_loop_ull_dynamic_start (bool up, gomp_ull start, gomp_ull end,
                             gomp_ull incr, gomp_ull chunk_size,
                             gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  if (gomp_work_share_start (false))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_DYNAMIC, chunk_size);
      gomp_work_share_init_done ();
    }
 
#if defined HAVE_SYNC_BUILTINS && defined __LP64__
  ret = gomp_iter_ull_dynamic_next (istart, iend);
#else
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_dynamic_next_locked (istart, iend);
  gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
 
  return ret;
}
 
static bool
gomp_loop_ull_guided_start (bool up, gomp_ull start, gomp_ull end,
                            gomp_ull incr, gomp_ull chunk_size,
                            gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  if (gomp_work_share_start (false))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_GUIDED, chunk_size);
      gomp_work_share_init_done ();
    }
 
#if defined HAVE_SYNC_BUILTINS && defined __LP64__
  ret = gomp_iter_ull_guided_next (istart, iend);
#else
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_guided_next_locked (istart, iend);
  gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
 
  return ret;
}
 
bool
GOMP_loop_ull_runtime_start (bool up, gomp_ull start, gomp_ull end,
                             gomp_ull incr, gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_task_icv *icv = gomp_icv (false);
  switch (icv->run_sched_var)
    {
    case GFS_STATIC:
      return gomp_loop_ull_static_start (up, start, end, incr,
                                         icv->run_sched_modifier,
                                         istart, iend);
    case GFS_DYNAMIC:
      return gomp_loop_ull_dynamic_start (up, start, end, incr,
                                          icv->run_sched_modifier,
                                          istart, iend);
    case GFS_GUIDED:
      return gomp_loop_ull_guided_start (up, start, end, incr,
                                         icv->run_sched_modifier,
                                         istart, iend);
    case GFS_AUTO:
      /* For now map to schedule(static), later on we could play with feedback
         driven choice.  */
      return gomp_loop_ull_static_start (up, start, end, incr,
                                         0, istart, iend);
    default:
      abort ();
    }
}
 
/* The *_ordered_*_start routines are similar.  The only difference is that
   this work-share construct is initialized to expect an ORDERED section.  */
 
static bool
gomp_loop_ull_ordered_static_start (bool up, gomp_ull start, gomp_ull end,
                                    gomp_ull incr, gomp_ull chunk_size,
                                    gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
 
  thr->ts.static_trip = 0;
  if (gomp_work_share_start (true))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_STATIC, chunk_size);
      gomp_ordered_static_init ();
      gomp_work_share_init_done ();
    }
 
  return !gomp_iter_ull_static_next (istart, iend);
}
 
static bool
gomp_loop_ull_ordered_dynamic_start (bool up, gomp_ull start, gomp_ull end,
                                     gomp_ull incr, gomp_ull chunk_size,
                                     gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  if (gomp_work_share_start (true))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_DYNAMIC, chunk_size);
      gomp_mutex_lock (&thr->ts.work_share->lock);
      gomp_work_share_init_done ();
    }
  else
    gomp_mutex_lock (&thr->ts.work_share->lock);
 
  ret = gomp_iter_ull_dynamic_next_locked (istart, iend);
  if (ret)
    gomp_ordered_first ();
  gomp_mutex_unlock (&thr->ts.work_share->lock);
 
  return ret;
}
 
static bool
gomp_loop_ull_ordered_guided_start (bool up, gomp_ull start, gomp_ull end,
                                    gomp_ull incr, gomp_ull chunk_size,
                                    gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  if (gomp_work_share_start (true))
    {
      gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,
                          GFS_GUIDED, chunk_size);
      gomp_mutex_lock (&thr->ts.work_share->lock);
      gomp_work_share_init_done ();
    }
  else
    gomp_mutex_lock (&thr->ts.work_share->lock);
 
  ret = gomp_iter_ull_guided_next_locked (istart, iend);
  if (ret)
    gomp_ordered_first ();
  gomp_mutex_unlock (&thr->ts.work_share->lock);
 
  return ret;
}
 
bool
GOMP_loop_ull_ordered_runtime_start (bool up, gomp_ull start, gomp_ull end,
                                     gomp_ull incr, gomp_ull *istart,
                                     gomp_ull *iend)
{
  struct gomp_task_icv *icv = gomp_icv (false);
  switch (icv->run_sched_var)
    {
    case GFS_STATIC:
      return gomp_loop_ull_ordered_static_start (up, start, end, incr,
                                                 icv->run_sched_modifier,
                                                 istart, iend);
    case GFS_DYNAMIC:
      return gomp_loop_ull_ordered_dynamic_start (up, start, end, incr,
                                                  icv->run_sched_modifier,
                                                  istart, iend);
    case GFS_GUIDED:
      return gomp_loop_ull_ordered_guided_start (up, start, end, incr,
                                                 icv->run_sched_modifier,
                                                 istart, iend);
    case GFS_AUTO:
      /* For now map to schedule(static), later on we could play with feedback
         driven choice.  */
      return gomp_loop_ull_ordered_static_start (up, start, end, incr,
                                                 0, istart, iend);
    default:
      abort ();
    }
}
 
/* The *_next routines are called when the thread completes processing of
   the iteration block currently assigned to it.  If the work-share
   construct is bound directly to a parallel construct, then the iteration
   bounds may have been set up before the parallel.  In which case, this
   may be the first iteration for the thread.
 
   Returns true if there is work remaining to be performed; *ISTART and
   *IEND are filled with a new iteration block.  Returns false if all work
   has been assigned.  */
 
static bool
gomp_loop_ull_static_next (gomp_ull *istart, gomp_ull *iend)
{
  return !gomp_iter_ull_static_next (istart, iend);
}
 
static bool
gomp_loop_ull_dynamic_next (gomp_ull *istart, gomp_ull *iend)
{
  bool ret;
 
#if defined HAVE_SYNC_BUILTINS && defined __LP64__
  ret = gomp_iter_ull_dynamic_next (istart, iend);
#else
  struct gomp_thread *thr = gomp_thread ();
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_dynamic_next_locked (istart, iend);
  gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
 
  return ret;
}
 
static bool
gomp_loop_ull_guided_next (gomp_ull *istart, gomp_ull *iend)
{
  bool ret;
 
#if defined HAVE_SYNC_BUILTINS && defined __LP64__
  ret = gomp_iter_ull_guided_next (istart, iend);
#else
  struct gomp_thread *thr = gomp_thread ();
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_guided_next_locked (istart, iend);
  gomp_mutex_unlock (&thr->ts.work_share->lock);
#endif
 
  return ret;
}
 
bool
GOMP_loop_ull_runtime_next (gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
 
  switch (thr->ts.work_share->sched)
    {
    case GFS_STATIC:
    case GFS_AUTO:
      return gomp_loop_ull_static_next (istart, iend);
    case GFS_DYNAMIC:
      return gomp_loop_ull_dynamic_next (istart, iend);
    case GFS_GUIDED:
      return gomp_loop_ull_guided_next (istart, iend);
    default:
      abort ();
    }
}
 
/* The *_ordered_*_next routines are called when the thread completes
   processing of the iteration block currently assigned to it.
 
   Returns true if there is work remaining to be performed; *ISTART and
   *IEND are filled with a new iteration block.  Returns false if all work
   has been assigned.  */
 
static bool
gomp_loop_ull_ordered_static_next (gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  int test;
 
  gomp_ordered_sync ();
  gomp_mutex_lock (&thr->ts.work_share->lock);
  test = gomp_iter_ull_static_next (istart, iend);
  if (test >= 0)
    gomp_ordered_static_next ();
  gomp_mutex_unlock (&thr->ts.work_share->lock);
 
  return test == 0;
}
 
static bool
gomp_loop_ull_ordered_dynamic_next (gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  gomp_ordered_sync ();
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_dynamic_next_locked (istart, iend);
  if (ret)
    gomp_ordered_next ();
  else
    gomp_ordered_last ();
  gomp_mutex_unlock (&thr->ts.work_share->lock);
 
  return ret;
}
 
static bool
gomp_loop_ull_ordered_guided_next (gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
  bool ret;
 
  gomp_ordered_sync ();
  gomp_mutex_lock (&thr->ts.work_share->lock);
  ret = gomp_iter_ull_guided_next_locked (istart, iend);
  if (ret)
    gomp_ordered_next ();
  else
    gomp_ordered_last ();
  gomp_mutex_unlock (&thr->ts.work_share->lock);
 
  return ret;
}
 
bool
GOMP_loop_ull_ordered_runtime_next (gomp_ull *istart, gomp_ull *iend)
{
  struct gomp_thread *thr = gomp_thread ();
 
  switch (thr->ts.work_share->sched)
    {
    case GFS_STATIC:
    case GFS_AUTO:
      return gomp_loop_ull_ordered_static_next (istart, iend);
    case GFS_DYNAMIC:
      return gomp_loop_ull_ordered_dynamic_next (istart, iend);
    case GFS_GUIDED:
      return gomp_loop_ull_ordered_guided_next (istart, iend);
    default:
      abort ();
    }
}
 
/* We use static functions above so that we're sure that the "runtime"
   function can defer to the proper routine without interposition.  We
   export the static function with a strong alias when possible, or with
   a wrapper function otherwise.  */
 
#ifdef HAVE_ATTRIBUTE_ALIAS
extern __typeof(gomp_loop_ull_static_start) GOMP_loop_ull_static_start
        __attribute__((alias ("gomp_loop_ull_static_start")));
extern __typeof(gomp_loop_ull_dynamic_start) GOMP_loop_ull_dynamic_start
        __attribute__((alias ("gomp_loop_ull_dynamic_start")));
extern __typeof(gomp_loop_ull_guided_start) GOMP_loop_ull_guided_start
        __attribute__((alias ("gomp_loop_ull_guided_start")));
 
extern __typeof(gomp_loop_ull_ordered_static_start) GOMP_loop_ull_ordered_static_start
        __attribute__((alias ("gomp_loop_ull_ordered_static_start")));
extern __typeof(gomp_loop_ull_ordered_dynamic_start) GOMP_loop_ull_ordered_dynamic_start
        __attribute__((alias ("gomp_loop_ull_ordered_dynamic_start")));
extern __typeof(gomp_loop_ull_ordered_guided_start) GOMP_loop_ull_ordered_guided_start
        __attribute__((alias ("gomp_loop_ull_ordered_guided_start")));
 
extern __typeof(gomp_loop_ull_static_next) GOMP_loop_ull_static_next
        __attribute__((alias ("gomp_loop_ull_static_next")));
extern __typeof(gomp_loop_ull_dynamic_next) GOMP_loop_ull_dynamic_next
        __attribute__((alias ("gomp_loop_ull_dynamic_next")));
extern __typeof(gomp_loop_ull_guided_next) GOMP_loop_ull_guided_next
        __attribute__((alias ("gomp_loop_ull_guided_next")));
 
extern __typeof(gomp_loop_ull_ordered_static_next) GOMP_loop_ull_ordered_static_next
        __attribute__((alias ("gomp_loop_ull_ordered_static_next")));
extern __typeof(gomp_loop_ull_ordered_dynamic_next) GOMP_loop_ull_ordered_dynamic_next
        __attribute__((alias ("gomp_loop_ull_ordered_dynamic_next")));
extern __typeof(gomp_loop_ull_ordered_guided_next) GOMP_loop_ull_ordered_guided_next
        __attribute__((alias ("gomp_loop_ull_ordered_guided_next")));
#else
bool
GOMP_loop_ull_static_start (bool up, gomp_ull start, gomp_ull end,
                            gomp_ull incr, gomp_ull chunk_size,
                            gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_static_start (up, start, end, incr, chunk_size, istart,
                                     iend);
}
 
bool
GOMP_loop_ull_dynamic_start (bool up, gomp_ull start, gomp_ull end,
                             gomp_ull incr, gomp_ull chunk_size,
                             gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_dynamic_start (up, start, end, incr, chunk_size, istart,
                                      iend);
}
 
bool
GOMP_loop_ull_guided_start (bool up, gomp_ull start, gomp_ull end,
                            gomp_ull incr, gomp_ull chunk_size,
                            gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_guided_start (up, start, end, incr, chunk_size, istart,
                                     iend);
}
 
bool
GOMP_loop_ull_ordered_static_start (bool up, gomp_ull start, gomp_ull end,
                                    gomp_ull incr, gomp_ull chunk_size,
                                    gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_static_start (up, start, end, incr, chunk_size,
                                             istart, iend);
}
 
bool
GOMP_loop_ull_ordered_dynamic_start (bool up, gomp_ull start, gomp_ull end,
                                     gomp_ull incr, gomp_ull chunk_size,
                                     gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_dynamic_start (up, start, end, incr, chunk_size,
                                              istart, iend);
}
 
bool
GOMP_loop_ull_ordered_guided_start (bool up, gomp_ull start, gomp_ull end,
                                    gomp_ull incr, gomp_ull chunk_size,
                                    gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_guided_start (up, start, end, incr, chunk_size,
                                             istart, iend);
}
 
bool
GOMP_loop_ull_static_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_static_next (istart, iend);
}
 
bool
GOMP_loop_ull_dynamic_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_dynamic_next (istart, iend);
}
 
bool
GOMP_loop_ull_guided_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_guided_next (istart, iend);
}
 
bool
GOMP_loop_ull_ordered_static_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_static_next (istart, iend);
}
 
bool
GOMP_loop_ull_ordered_dynamic_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_dynamic_next (istart, iend);
}
 
bool
GOMP_loop_ull_ordered_guided_next (gomp_ull *istart, gomp_ull *iend)
{
  return gomp_loop_ull_ordered_guided_next (istart, iend);
}
#endif

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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libgomp/] [loop_ull.c] - Blame information for rev 281

Line No.	Rev	Author	Line
1	273	jeremybenn	`/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.`
2			`Contributed by Richard Henderson <rth@redhat.com>.`
3
4			`This file is part of the GNU OpenMP Library (libgomp).`
5
6			`Libgomp is free software; you can redistribute it and/or modify it`
7			`under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 3, or (at your option)`
9			`any later version.`
10
11			`Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY`
12			`WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS`
13			`FOR A PARTICULAR PURPOSE. See the GNU General Public License for`
14			`more details.`
15
16			`Under Section 7 of GPL version 3, you are granted additional`
17			`permissions described in the GCC Runtime Library Exception, version`
18			`3.1, as published by the Free Software Foundation.`
19
20			`You should have received a copy of the GNU General Public License and`
21			`a copy of the GCC Runtime Library Exception along with this program;`
22			`see the files COPYING3 and COPYING.RUNTIME respectively. If not, see`
23			`<http://www.gnu.org/licenses/>. */`
24
25			`/* This file handles the LOOP (FOR/DO) construct. */`
26
27			`#include <limits.h>`
28			`#include <stdlib.h>`
29			`#include "libgomp.h"`
30
31			`typedef unsigned long long gomp_ull;`
32
33			`/* Initialize the given work share construct from the given arguments. */`
34
35			`static inline void`
36			`gomp_loop_ull_init (struct gomp_work_share *ws, bool up, gomp_ull start,`
37			`gomp_ull end, gomp_ull incr, enum gomp_schedule_type sched,`
38			`gomp_ull chunk_size)`
39			`{`
40			`ws->sched = sched;`
41			`ws->chunk_size_ull = chunk_size;`
42			`/* Canonicalize loops that have zero iterations to ->next == ->end. */`
43			`ws->end_ull = ((up && start > end) \|\| (!up && start < end))`
44			`? start : end;`
45			`ws->incr_ull = incr;`
46			`ws->next_ull = start;`
47			`ws->mode = 0;`
48			`if (sched == GFS_DYNAMIC)`
49			`{`
50			`ws->chunk_size_ull *= incr;`
51
52			`#if defined HAVE_SYNC_BUILTINS && defined __LP64__`
53			`{`
54			`/* For dynamic scheduling prepare things to make each iteration`
55			`faster. */`
56			`struct gomp_thread *thr = gomp_thread ();`
57			`struct gomp_team *team = thr->ts.team;`
58			`long nthreads = team ? team->nthreads : 1;`
59
60			`if (__builtin_expect (up, 1))`
61			`{`
62			`/* Cheap overflow protection. */`
63			`if (__builtin_expect ((nthreads \| ws->chunk_size_ull)`
64			`< 1ULL << (sizeof (gomp_ull)`
65			`* __CHAR_BIT__ / 2 - 1), 1))`
66			`ws->mode = ws->end_ull < (__LONG_LONG_MAX__ * 2ULL + 1`
67			`- (nthreads + 1) * ws->chunk_size_ull);`
68			`}`
69			`/* Cheap overflow protection. */`
70			`else if (__builtin_expect ((nthreads \| -ws->chunk_size_ull)`
71			`< 1ULL << (sizeof (gomp_ull)`
72			`* __CHAR_BIT__ / 2 - 1), 1))`
73			`ws->mode = ws->end_ull > ((nthreads + 1) * -ws->chunk_size_ull`
74			`- (__LONG_LONG_MAX__ * 2ULL + 1));`
75			`}`
76			`#endif`
77			`}`
78			`if (!up)`
79			`ws->mode \|= 2;`
80			`}`
81
82			`/* The *_start routines are called when first encountering a loop construct`
83			`that is not bound directly to a parallel construct. The first thread`
84			`that arrives will create the work-share construct; subsequent threads`
85			`will see the construct exists and allocate work from it.`
86
87			`START, END, INCR are the bounds of the loop; due to the restrictions of`
88			`OpenMP, these values must be the same in every thread. This is not`
89			`verified (nor is it entirely verifiable, since START is not necessarily`
90			`retained intact in the work-share data structure). CHUNK_SIZE is the`
91			`scheduling parameter; again this must be identical in all threads.`
92
93			`Returns true if there's any work for this thread to perform. If so,`
94			`ISTART and IEND are filled with the bounds of the iteration block`
95			`allocated to this thread. Returns false if all work was assigned to`
96			`other threads prior to this thread's arrival. */`
97
98			`static bool`
99			`gomp_loop_ull_static_start (bool up, gomp_ull start, gomp_ull end,`
100			`gomp_ull incr, gomp_ull chunk_size,`
101			`gomp_ull istart, gomp_ull iend)`
102			`{`
103			`struct gomp_thread *thr = gomp_thread ();`
104
105			`thr->ts.static_trip = 0;`
106			`if (gomp_work_share_start (false))`
107			`{`
108			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
109			`GFS_STATIC, chunk_size);`
110			`gomp_work_share_init_done ();`
111			`}`
112
113			`return !gomp_iter_ull_static_next (istart, iend);`
114			`}`
115
116			`static bool`
117			`gomp_loop_ull_dynamic_start (bool up, gomp_ull start, gomp_ull end,`
118			`gomp_ull incr, gomp_ull chunk_size,`
119			`gomp_ull istart, gomp_ull iend)`
120			`{`
121			`struct gomp_thread *thr = gomp_thread ();`
122			`bool ret;`
123
124			`if (gomp_work_share_start (false))`
125			`{`
126			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
127			`GFS_DYNAMIC, chunk_size);`
128			`gomp_work_share_init_done ();`
129			`}`
130
131			`#if defined HAVE_SYNC_BUILTINS && defined __LP64__`
132			`ret = gomp_iter_ull_dynamic_next (istart, iend);`
133			`#else`
134			`gomp_mutex_lock (&thr->ts.work_share->lock);`
135			`ret = gomp_iter_ull_dynamic_next_locked (istart, iend);`
136			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
137			`#endif`
138
139			`return ret;`
140			`}`
141
142			`static bool`
143			`gomp_loop_ull_guided_start (bool up, gomp_ull start, gomp_ull end,`
144			`gomp_ull incr, gomp_ull chunk_size,`
145			`gomp_ull istart, gomp_ull iend)`
146			`{`
147			`struct gomp_thread *thr = gomp_thread ();`
148			`bool ret;`
149
150			`if (gomp_work_share_start (false))`
151			`{`
152			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
153			`GFS_GUIDED, chunk_size);`
154			`gomp_work_share_init_done ();`
155			`}`
156
157			`#if defined HAVE_SYNC_BUILTINS && defined __LP64__`
158			`ret = gomp_iter_ull_guided_next (istart, iend);`
159			`#else`
160			`gomp_mutex_lock (&thr->ts.work_share->lock);`
161			`ret = gomp_iter_ull_guided_next_locked (istart, iend);`
162			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
163			`#endif`
164
165			`return ret;`
166			`}`
167
168			`bool`
169			`GOMP_loop_ull_runtime_start (bool up, gomp_ull start, gomp_ull end,`
170			`gomp_ull incr, gomp_ull istart, gomp_ull iend)`
171			`{`
172			`struct gomp_task_icv *icv = gomp_icv (false);`
173			`switch (icv->run_sched_var)`
174			`{`
175			`case GFS_STATIC:`
176			`return gomp_loop_ull_static_start (up, start, end, incr,`
177			`icv->run_sched_modifier,`
178			`istart, iend);`
179			`case GFS_DYNAMIC:`
180			`return gomp_loop_ull_dynamic_start (up, start, end, incr,`
181			`icv->run_sched_modifier,`
182			`istart, iend);`
183			`case GFS_GUIDED:`
184			`return gomp_loop_ull_guided_start (up, start, end, incr,`
185			`icv->run_sched_modifier,`
186			`istart, iend);`
187			`case GFS_AUTO:`
188			`/* For now map to schedule(static), later on we could play with feedback`
189			`driven choice. */`
190			`return gomp_loop_ull_static_start (up, start, end, incr,`
191			`0, istart, iend);`
192			`default:`
193			`abort ();`
194			`}`
195			`}`
196
197			`/* The _ordered__start routines are similar. The only difference is that`
198			`this work-share construct is initialized to expect an ORDERED section. */`
199
200			`static bool`
201			`gomp_loop_ull_ordered_static_start (bool up, gomp_ull start, gomp_ull end,`
202			`gomp_ull incr, gomp_ull chunk_size,`
203			`gomp_ull istart, gomp_ull iend)`
204			`{`
205			`struct gomp_thread *thr = gomp_thread ();`
206
207			`thr->ts.static_trip = 0;`
208			`if (gomp_work_share_start (true))`
209			`{`
210			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
211			`GFS_STATIC, chunk_size);`
212			`gomp_ordered_static_init ();`
213			`gomp_work_share_init_done ();`
214			`}`
215
216			`return !gomp_iter_ull_static_next (istart, iend);`
217			`}`
218
219			`static bool`
220			`gomp_loop_ull_ordered_dynamic_start (bool up, gomp_ull start, gomp_ull end,`
221			`gomp_ull incr, gomp_ull chunk_size,`
222			`gomp_ull istart, gomp_ull iend)`
223			`{`
224			`struct gomp_thread *thr = gomp_thread ();`
225			`bool ret;`
226
227			`if (gomp_work_share_start (true))`
228			`{`
229			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
230			`GFS_DYNAMIC, chunk_size);`
231			`gomp_mutex_lock (&thr->ts.work_share->lock);`
232			`gomp_work_share_init_done ();`
233			`}`
234			`else`
235			`gomp_mutex_lock (&thr->ts.work_share->lock);`
236
237			`ret = gomp_iter_ull_dynamic_next_locked (istart, iend);`
238			`if (ret)`
239			`gomp_ordered_first ();`
240			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
241
242			`return ret;`
243			`}`
244
245			`static bool`
246			`gomp_loop_ull_ordered_guided_start (bool up, gomp_ull start, gomp_ull end,`
247			`gomp_ull incr, gomp_ull chunk_size,`
248			`gomp_ull istart, gomp_ull iend)`
249			`{`
250			`struct gomp_thread *thr = gomp_thread ();`
251			`bool ret;`
252
253			`if (gomp_work_share_start (true))`
254			`{`
255			`gomp_loop_ull_init (thr->ts.work_share, up, start, end, incr,`
256			`GFS_GUIDED, chunk_size);`
257			`gomp_mutex_lock (&thr->ts.work_share->lock);`
258			`gomp_work_share_init_done ();`
259			`}`
260			`else`
261			`gomp_mutex_lock (&thr->ts.work_share->lock);`
262
263			`ret = gomp_iter_ull_guided_next_locked (istart, iend);`
264			`if (ret)`
265			`gomp_ordered_first ();`
266			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
267
268			`return ret;`
269			`}`
270
271			`bool`
272			`GOMP_loop_ull_ordered_runtime_start (bool up, gomp_ull start, gomp_ull end,`
273			`gomp_ull incr, gomp_ull *istart,`
274			`gomp_ull *iend)`
275			`{`
276			`struct gomp_task_icv *icv = gomp_icv (false);`
277			`switch (icv->run_sched_var)`
278			`{`
279			`case GFS_STATIC:`
280			`return gomp_loop_ull_ordered_static_start (up, start, end, incr,`
281			`icv->run_sched_modifier,`
282			`istart, iend);`
283			`case GFS_DYNAMIC:`
284			`return gomp_loop_ull_ordered_dynamic_start (up, start, end, incr,`
285			`icv->run_sched_modifier,`
286			`istart, iend);`
287			`case GFS_GUIDED:`
288			`return gomp_loop_ull_ordered_guided_start (up, start, end, incr,`
289			`icv->run_sched_modifier,`
290			`istart, iend);`
291			`case GFS_AUTO:`
292			`/* For now map to schedule(static), later on we could play with feedback`
293			`driven choice. */`
294			`return gomp_loop_ull_ordered_static_start (up, start, end, incr,`
295			`0, istart, iend);`
296			`default:`
297			`abort ();`
298			`}`
299			`}`
300
301			`/* The *_next routines are called when the thread completes processing of`
302			`the iteration block currently assigned to it. If the work-share`
303			`construct is bound directly to a parallel construct, then the iteration`
304			`bounds may have been set up before the parallel. In which case, this`
305			`may be the first iteration for the thread.`
306
307			`Returns true if there is work remaining to be performed; *ISTART and`
308			`*IEND are filled with a new iteration block. Returns false if all work`
309			`has been assigned. */`
310
311			`static bool`
312			`gomp_loop_ull_static_next (gomp_ull istart, gomp_ull iend)`
313			`{`
314			`return !gomp_iter_ull_static_next (istart, iend);`
315			`}`
316
317			`static bool`
318			`gomp_loop_ull_dynamic_next (gomp_ull istart, gomp_ull iend)`
319			`{`
320			`bool ret;`
321
322			`#if defined HAVE_SYNC_BUILTINS && defined __LP64__`
323			`ret = gomp_iter_ull_dynamic_next (istart, iend);`
324			`#else`
325			`struct gomp_thread *thr = gomp_thread ();`
326			`gomp_mutex_lock (&thr->ts.work_share->lock);`
327			`ret = gomp_iter_ull_dynamic_next_locked (istart, iend);`
328			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
329			`#endif`
330
331			`return ret;`
332			`}`
333
334			`static bool`
335			`gomp_loop_ull_guided_next (gomp_ull istart, gomp_ull iend)`
336			`{`
337			`bool ret;`
338
339			`#if defined HAVE_SYNC_BUILTINS && defined __LP64__`
340			`ret = gomp_iter_ull_guided_next (istart, iend);`
341			`#else`
342			`struct gomp_thread *thr = gomp_thread ();`
343			`gomp_mutex_lock (&thr->ts.work_share->lock);`
344			`ret = gomp_iter_ull_guided_next_locked (istart, iend);`
345			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
346			`#endif`
347
348			`return ret;`
349			`}`
350
351			`bool`
352			`GOMP_loop_ull_runtime_next (gomp_ull istart, gomp_ull iend)`
353			`{`
354			`struct gomp_thread *thr = gomp_thread ();`
355
356			`switch (thr->ts.work_share->sched)`
357			`{`
358			`case GFS_STATIC:`
359			`case GFS_AUTO:`
360			`return gomp_loop_ull_static_next (istart, iend);`
361			`case GFS_DYNAMIC:`
362			`return gomp_loop_ull_dynamic_next (istart, iend);`
363			`case GFS_GUIDED:`
364			`return gomp_loop_ull_guided_next (istart, iend);`
365			`default:`
366			`abort ();`
367			`}`
368			`}`
369
370			`/* The _ordered__next routines are called when the thread completes`
371			`processing of the iteration block currently assigned to it.`
372
373			`Returns true if there is work remaining to be performed; *ISTART and`
374			`*IEND are filled with a new iteration block. Returns false if all work`
375			`has been assigned. */`
376
377			`static bool`
378			`gomp_loop_ull_ordered_static_next (gomp_ull istart, gomp_ull iend)`
379			`{`
380			`struct gomp_thread *thr = gomp_thread ();`
381			`int test;`
382
383			`gomp_ordered_sync ();`
384			`gomp_mutex_lock (&thr->ts.work_share->lock);`
385			`test = gomp_iter_ull_static_next (istart, iend);`
386			`if (test >= 0)`
387			`gomp_ordered_static_next ();`
388			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
389
390			`return test == 0;`
391			`}`
392
393			`static bool`
394			`gomp_loop_ull_ordered_dynamic_next (gomp_ull istart, gomp_ull iend)`
395			`{`
396			`struct gomp_thread *thr = gomp_thread ();`
397			`bool ret;`
398
399			`gomp_ordered_sync ();`
400			`gomp_mutex_lock (&thr->ts.work_share->lock);`
401			`ret = gomp_iter_ull_dynamic_next_locked (istart, iend);`
402			`if (ret)`
403			`gomp_ordered_next ();`
404			`else`
405			`gomp_ordered_last ();`
406			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
407
408			`return ret;`
409			`}`
410
411			`static bool`
412			`gomp_loop_ull_ordered_guided_next (gomp_ull istart, gomp_ull iend)`
413			`{`
414			`struct gomp_thread *thr = gomp_thread ();`
415			`bool ret;`
416
417			`gomp_ordered_sync ();`
418			`gomp_mutex_lock (&thr->ts.work_share->lock);`
419			`ret = gomp_iter_ull_guided_next_locked (istart, iend);`
420			`if (ret)`
421			`gomp_ordered_next ();`
422			`else`
423			`gomp_ordered_last ();`
424			`gomp_mutex_unlock (&thr->ts.work_share->lock);`
425
426			`return ret;`
427			`}`
428
429			`bool`
430			`GOMP_loop_ull_ordered_runtime_next (gomp_ull istart, gomp_ull iend)`
431			`{`
432			`struct gomp_thread *thr = gomp_thread ();`
433
434			`switch (thr->ts.work_share->sched)`
435			`{`
436			`case GFS_STATIC:`
437			`case GFS_AUTO:`
438			`return gomp_loop_ull_ordered_static_next (istart, iend);`
439			`case GFS_DYNAMIC:`
440			`return gomp_loop_ull_ordered_dynamic_next (istart, iend);`
441			`case GFS_GUIDED:`
442			`return gomp_loop_ull_ordered_guided_next (istart, iend);`
443			`default:`
444			`abort ();`
445			`}`
446			`}`
447
448			`/* We use static functions above so that we're sure that the "runtime"`
449			`function can defer to the proper routine without interposition. We`
450			`export the static function with a strong alias when possible, or with`
451			`a wrapper function otherwise. */`
452
453			`#ifdef HAVE_ATTRIBUTE_ALIAS`
454			`extern __typeof(gomp_loop_ull_static_start) GOMP_loop_ull_static_start`
455			`__attribute__((alias ("gomp_loop_ull_static_start")));`
456			`extern __typeof(gomp_loop_ull_dynamic_start) GOMP_loop_ull_dynamic_start`
457			`__attribute__((alias ("gomp_loop_ull_dynamic_start")));`
458			`extern __typeof(gomp_loop_ull_guided_start) GOMP_loop_ull_guided_start`
459			`__attribute__((alias ("gomp_loop_ull_guided_start")));`
460
461			`extern __typeof(gomp_loop_ull_ordered_static_start) GOMP_loop_ull_ordered_static_start`
462			`__attribute__((alias ("gomp_loop_ull_ordered_static_start")));`
463			`extern __typeof(gomp_loop_ull_ordered_dynamic_start) GOMP_loop_ull_ordered_dynamic_start`
464			`__attribute__((alias ("gomp_loop_ull_ordered_dynamic_start")));`
465			`extern __typeof(gomp_loop_ull_ordered_guided_start) GOMP_loop_ull_ordered_guided_start`
466			`__attribute__((alias ("gomp_loop_ull_ordered_guided_start")));`
467
468			`extern __typeof(gomp_loop_ull_static_next) GOMP_loop_ull_static_next`
469			`__attribute__((alias ("gomp_loop_ull_static_next")));`
470			`extern __typeof(gomp_loop_ull_dynamic_next) GOMP_loop_ull_dynamic_next`
471			`__attribute__((alias ("gomp_loop_ull_dynamic_next")));`
472			`extern __typeof(gomp_loop_ull_guided_next) GOMP_loop_ull_guided_next`
473			`__attribute__((alias ("gomp_loop_ull_guided_next")));`
474
475			`extern __typeof(gomp_loop_ull_ordered_static_next) GOMP_loop_ull_ordered_static_next`
476			`__attribute__((alias ("gomp_loop_ull_ordered_static_next")));`
477			`extern __typeof(gomp_loop_ull_ordered_dynamic_next) GOMP_loop_ull_ordered_dynamic_next`
478			`__attribute__((alias ("gomp_loop_ull_ordered_dynamic_next")));`
479			`extern __typeof(gomp_loop_ull_ordered_guided_next) GOMP_loop_ull_ordered_guided_next`
480			`__attribute__((alias ("gomp_loop_ull_ordered_guided_next")));`
481			`#else`
482			`bool`
483			`GOMP_loop_ull_static_start (bool up, gomp_ull start, gomp_ull end,`
484			`gomp_ull incr, gomp_ull chunk_size,`
485			`gomp_ull istart, gomp_ull iend)`
486			`{`
487			`return gomp_loop_ull_static_start (up, start, end, incr, chunk_size, istart,`
488			`iend);`
489			`}`
490
491			`bool`
492			`GOMP_loop_ull_dynamic_start (bool up, gomp_ull start, gomp_ull end,`
493			`gomp_ull incr, gomp_ull chunk_size,`
494			`gomp_ull istart, gomp_ull iend)`
495			`{`
496			`return gomp_loop_ull_dynamic_start (up, start, end, incr, chunk_size, istart,`
497			`iend);`
498			`}`
499
500			`bool`
501			`GOMP_loop_ull_guided_start (bool up, gomp_ull start, gomp_ull end,`
502			`gomp_ull incr, gomp_ull chunk_size,`
503			`gomp_ull istart, gomp_ull iend)`
504			`{`
505			`return gomp_loop_ull_guided_start (up, start, end, incr, chunk_size, istart,`
506			`iend);`
507			`}`
508
509			`bool`
510			`GOMP_loop_ull_ordered_static_start (bool up, gomp_ull start, gomp_ull end,`
511			`gomp_ull incr, gomp_ull chunk_size,`
512			`gomp_ull istart, gomp_ull iend)`
513			`{`
514			`return gomp_loop_ull_ordered_static_start (up, start, end, incr, chunk_size,`
515			`istart, iend);`
516			`}`
517
518			`bool`
519			`GOMP_loop_ull_ordered_dynamic_start (bool up, gomp_ull start, gomp_ull end,`
520			`gomp_ull incr, gomp_ull chunk_size,`
521			`gomp_ull istart, gomp_ull iend)`
522			`{`
523			`return gomp_loop_ull_ordered_dynamic_start (up, start, end, incr, chunk_size,`
524			`istart, iend);`
525			`}`
526
527			`bool`
528			`GOMP_loop_ull_ordered_guided_start (bool up, gomp_ull start, gomp_ull end,`
529			`gomp_ull incr, gomp_ull chunk_size,`
530			`gomp_ull istart, gomp_ull iend)`
531			`{`
532			`return gomp_loop_ull_ordered_guided_start (up, start, end, incr, chunk_size,`
533			`istart, iend);`
534			`}`
535
536			`bool`
537			`GOMP_loop_ull_static_next (gomp_ull istart, gomp_ull iend)`
538			`{`
539			`return gomp_loop_ull_static_next (istart, iend);`
540			`}`
541
542			`bool`
543			`GOMP_loop_ull_dynamic_next (gomp_ull istart, gomp_ull iend)`
544			`{`
545			`return gomp_loop_ull_dynamic_next (istart, iend);`
546			`}`
547
548			`bool`
549			`GOMP_loop_ull_guided_next (gomp_ull istart, gomp_ull iend)`
550			`{`
551			`return gomp_loop_ull_guided_next (istart, iend);`
552			`}`
553
554			`bool`
555			`GOMP_loop_ull_ordered_static_next (gomp_ull istart, gomp_ull iend)`
556			`{`
557			`return gomp_loop_ull_ordered_static_next (istart, iend);`
558			`}`
559
560			`bool`
561			`GOMP_loop_ull_ordered_dynamic_next (gomp_ull istart, gomp_ull iend)`
562			`{`
563			`return gomp_loop_ull_ordered_dynamic_next (istart, iend);`
564			`}`
565
566			`bool`
567			`GOMP_loop_ull_ordered_guided_next (gomp_ull istart, gomp_ull iend)`
568			`{`
569			`return gomp_loop_ull_ordered_guided_next (istart, iend);`
570			`}`
571			`#endif`