]>
Commit | Line | Data |
---|---|---|
748086b7 | 1 | /* Copyright (C) 2007, 2009 Free Software Foundation, Inc. |
1763dfa7 UW |
2 | |
3 | This file is part of GCC. | |
4 | ||
5 | GCC is free software; you can redistribute it and/or modify it under | |
6 | the terms of the GNU General Public License as published by the Free | |
748086b7 | 7 | Software Foundation; either version 3, or (at your option) any later |
1763dfa7 UW |
8 | version. |
9 | ||
1763dfa7 UW |
10 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
11 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | for more details. | |
14 | ||
748086b7 JJ |
15 | Under Section 7 of GPL version 3, you are granted additional |
16 | permissions described in the GCC Runtime Library Exception, version | |
17 | 3.1, as published by the Free Software Foundation. | |
18 | ||
19 | You should have received a copy of the GNU General Public License and | |
20 | a copy of the GCC Runtime Library Exception along with this program; | |
21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
22 | <http://www.gnu.org/licenses/>. */ | |
1763dfa7 UW |
23 | |
24 | #include <spu_mfcio.h> | |
25 | extern vector unsigned int __mfc_tag_table; | |
26 | ||
27 | /* Release the specified DMA tag from exclusive use. Once released, the | |
28 | tag is available for future reservation. Upon sucessful release, | |
29 | MFC_DMA_TAG_VALID is returned. If the specified tag is not in the | |
30 | range 0 to 31, or had not been reserved, no action is taken and | |
31 | MFC_DMA_TAG_INVALID is returned. */ | |
32 | ||
33 | unsigned int | |
34 | __mfc_tag_release (unsigned int tag) | |
35 | { | |
36 | vector unsigned int is_invalid; | |
37 | vector unsigned int mask = (vector unsigned int) | |
38 | { 0x80000000, 0x80000000, 0x80000000, 0x80000000 }; | |
39 | vector signed int zero = (vector signed int) { 0, 0, 0, 0 }; | |
40 | ||
41 | vector signed int has_been_reserved; | |
42 | ||
43 | /* Check if the tag is out of range. */ | |
44 | is_invalid = spu_cmpgt (spu_promote (tag, 0), 31); | |
45 | ||
46 | /* Check whether the tag has been reserved, set to all 1 if has not | |
47 | been reserved, 0 otherwise. */ | |
48 | has_been_reserved = (vector signed int) spu_rl (__mfc_tag_table, tag); | |
49 | has_been_reserved = (vector signed int) spu_cmpgt (zero, has_been_reserved); | |
50 | ||
51 | /* Set invalid. */ | |
52 | is_invalid = spu_or ((vector unsigned int) has_been_reserved, is_invalid); | |
53 | ||
54 | mask = spu_rlmask (mask, (int)(-tag)); | |
55 | __mfc_tag_table = spu_or (__mfc_tag_table, mask); | |
56 | ||
57 | return spu_extract(is_invalid, 0); | |
58 | } | |
59 |