| /* Copyright (C) 2007-2013 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC 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. |
| |
| GCC 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/>. */ |
| |
| #include <spu_mfcio.h> |
| extern vector unsigned int __mfc_tag_table; |
| |
| /* Release the specified DMA tag from exclusive use. Once released, the |
| tag is available for future reservation. Upon successful release, |
| MFC_DMA_TAG_VALID is returned. If the specified tag is not in the |
| range 0 to 31, or had not been reserved, no action is taken and |
| MFC_DMA_TAG_INVALID is returned. */ |
| |
| unsigned int |
| __mfc_tag_release (unsigned int tag) |
| { |
| vector unsigned int is_invalid; |
| vector unsigned int mask = (vector unsigned int) |
| { 0x80000000, 0x80000000, 0x80000000, 0x80000000 }; |
| vector signed int zero = (vector signed int) { 0, 0, 0, 0 }; |
| |
| vector signed int has_been_reserved; |
| |
| /* Check if the tag is out of range. */ |
| is_invalid = spu_cmpgt (spu_promote (tag, 0), 31); |
| |
| /* Check whether the tag has been reserved, set to all 1 if has not |
| been reserved, 0 otherwise. */ |
| has_been_reserved = (vector signed int) spu_rl (__mfc_tag_table, tag); |
| has_been_reserved = (vector signed int) spu_cmpgt (zero, has_been_reserved); |
| |
| /* Set invalid. */ |
| is_invalid = spu_or ((vector unsigned int) has_been_reserved, is_invalid); |
| |
| mask = spu_rlmask (mask, (int)(-tag)); |
| __mfc_tag_table = spu_or (__mfc_tag_table, mask); |
| |
| return spu_extract(is_invalid, 0); |
| } |
| |