libcilkrts/runtime/config/sparc/os-unix-sysdep.c

   1 /* os-unix-sysdep.c                  -*-C-*-
   2  *
   3  *************************************************************************
   4  *
   5  *  Copyright (C) 2009-2016, Intel Corporation
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions
  10  *  are met:
  11  *
  12  *    * Redistributions of source code must retain the above copyright
  13  *      notice, this list of conditions and the following disclaimer.
  14  *    * Redistributions in binary form must reproduce the above copyright
  15  *      notice, this list of conditions and the following disclaimer in
  16  *      the documentation and/or other materials provided with the
  17  *      distribution.
  18  *    * Neither the name of Intel Corporation nor the names of its
  19  *      contributors may be used to endorse or promote products derived
  20  *      from this software without specific prior written permission.
  21  *
  22  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26  *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
  29  *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  *  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
  32  *  WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  *  POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  *  *********************************************************************
  36  *
  37  *  PLEASE NOTE: This file is a downstream copy of a file mainitained in
  38  *  a repository at cilkplus.org. Changes made to this file that are not
  39  *  submitted through the contribution process detailed at
  40  *  http://www.cilkplus.org/submit-cilk-contribution will be lost the next
  41  *  time that a new version is released. Changes only submitted to the
  42  *  GNU compiler collection or posted to the git repository at
  43  *  https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
  44  *  not tracked.
  45  *
  46  *  We welcome your contributions to this open source project. Thank you
  47  *  for your assistance in helping us improve Cilk Plus.
  48  *************************************************************************
  49  *
  50  * This file contains system-specific code for SPARC-based systems
  51  */
  52
  53 #include "os.h"
  54 #include "sysdep.h"
  55
  56 /*
  57  * The cycle counter is used for debugging.  This function is only called if
  58  * CILK_PROFILE is defined when the runtime is built.
  59  */
  60 COMMON_SYSDEP unsigned long long __cilkrts_getticks(void)
  61 {
  62     unsigned long long tick;
  63 #if defined(__sparcv9) || defined(__arch64__)
  64     __asm__ volatile("rd %%tick, %0" : "=r"(tick));
  65 #else
  66     __asm__ volatile("rd %%tick, %L0\n"
  67                      "srlx %L0, 32, %H0"
  68                      : "=r"(tick));
  69 #endif
  70     return tick;
  71 }
  72
  73 /*
  74  * A "short pause" - called from the Cilk runtime's spinloops.
  75  */
  76 COMMON_SYSDEP void __cilkrts_short_pause(void)
  77 {
  78     /* Spin around for 8 cycles.  */
  79     __asm__ volatile("rd %ccr, %g0");
  80     __asm__ volatile("rd %ccr, %g0");
  81     __asm__ volatile("rd %ccr, %g0");
  82     __asm__ volatile("rd %ccr, %g0");
  83 }
  84
  85 /*
  86  * Interlocked exchange - used to implement the Cilk runtime's spinloops
  87  */
  88 COMMON_SYSDEP int __cilkrts_xchg(volatile int *ptr, int x)
  89 {
  90     x = __sync_lock_test_and_set(ptr, x);
  91     return x;
  92 }
  93
  94
  95 /*
  96  * Restore the floating point state that is stored in a stack frame at each
  97  * spawn.  This should be called each time a frame is resumed.
  98  *
  99  * Only valid for IA32 and Intel64 processors.
 100  */
 101 void restore_x86_fp_state (__cilkrts_stack_frame *sf)
 102 {
 103 }
 104
 105
 106 /*
 107  * Save the floating point state to the __cilkrts_stack_frame at each spawn.
 108  *
 109  * Architecture-specific - Should only be needed on IA32 and Intel64
 110  * processors.
 111  */
 112 void sysdep_save_fp_ctrl_state(__cilkrts_stack_frame *sf)
 113 {
 114 }
 115