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1 | /* os-unix-sysdep.c -*-C-*- |
2 | * | |
3 | ************************************************************************* | |
4 | * | |
2e01cda6 | 5 | * Copyright (C) 2009-2016, Intel Corporation |
3038054c BI |
6 | * All rights reserved. |
7 | * | |
3038054c BI |
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 | * | |
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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. | |
2e01cda6 IV |
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. | |
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48 | ************************************************************************* |
49 | * | |
50 | * This file contains generic implementations of system-specific code for | |
51 | * Unix-based systems | |
52 | */ | |
53 | ||
54 | #include "os.h" | |
55 | #include "sysdep.h" | |
56 | ||
57 | /* | |
58 | * The cycle counter is used for debugging. This funciton is only called if | |
59 | * CILK_PROFILE is defined when the runtime is built. | |
60 | */ | |
61 | COMMON_SYSDEP unsigned long long __cilkrts_getticks(void) | |
62 | { | |
63 | # warning "unimplemented cycle counter" | |
64 | return 0; | |
65 | } | |
66 | ||
67 | /* | |
68 | * A "short pause" - called from the Cilk runtime's spinloops. | |
69 | */ | |
70 | COMMON_SYSDEP void __cilkrts_short_pause(void) | |
71 | { | |
72 | # warning __cilkrts_short_pause empty | |
73 | } | |
74 | ||
75 | /* | |
76 | * Interlocked exchange - used to implement the Cilk runtime's spinloops | |
77 | */ | |
78 | COMMON_SYSDEP int __cilkrts_xchg(volatile int *ptr, int x) | |
79 | { | |
80 | x = __sync_lock_test_and_set(ptr, x); | |
81 | return x; | |
82 | } | |
83 | ||
84 | ||
85 | /* | |
86 | * Restore the floating point state that is stored in a stack frame at each | |
87 | * spawn. This should be called each time a frame is resumed. | |
88 | * | |
89 | * Only valid for IA32 and Intel64 processors. | |
90 | */ | |
91 | void restore_x86_fp_state (__cilkrts_stack_frame *sf) | |
92 | { | |
93 | } | |
94 | ||
95 | ||
96 | /* | |
97 | * Save the floating point state to the __cilkrts_stack_frame at each spawn. | |
98 | * | |
99 | * Architecture-specific - Should only be needed on IA32 and Intel64 | |
100 | * processors. | |
101 | */ | |
102 | void sysdep_save_fp_ctrl_state(__cilkrts_stack_frame *sf) | |
103 | { | |
104 | } | |
105 |