1/* Copyright (C) 2007-2019 Free Software Foundation, Inc. 2 3This file is part of GCC. 4 5GCC is free software; you can redistribute it and/or modify it under 6the terms of the GNU General Public License as published by the Free 7Software Foundation; either version 3, or (at your option) any later 8version. 9 10GCC is distributed in the hope that it will be useful, but WITHOUT ANY 11WARRANTY; without even the implied warranty of MERCHANTABILITY or 12FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13for more details. 14 15Under Section 7 of GPL version 3, you are granted additional 16permissions described in the GCC Runtime Library Exception, version 173.1, as published by the Free Software Foundation. 18 19You should have received a copy of the GNU General Public License and 20a copy of the GCC Runtime Library Exception along with this program; 21see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 22<http://www.gnu.org/licenses/>. */ 23 24#include <spu_mfcio.h> 25extern 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 successful 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 33unsigned 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 60