diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/spu/mfc_multi_tag_release.c')
| -rw-r--r-- | gcc-4.9/libgcc/config/spu/mfc_multi_tag_release.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/spu/mfc_multi_tag_release.c b/gcc-4.9/libgcc/config/spu/mfc_multi_tag_release.c new file mode 100644 index 000000000..ceddfd8c0 --- /dev/null +++ b/gcc-4.9/libgcc/config/spu/mfc_multi_tag_release.c @@ -0,0 +1,72 @@ +/* Copyright (C) 2007-2014 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 a sequential group of tags from exclusive use. The sequential + group of tags is the range starting from <first_tag> through + <first_tag>+<number_of_tags>-1. Upon successful release, MFC_DMA_TAG_VALID + is returned and the tags become available for future reservation. + + If the specified tags were not previously reserved, no action is + taken and MFC_DMA_TAG_INVALID is returned. */ + +unsigned int +__mfc_multi_tag_release (unsigned int first_tag, unsigned int number_of_tags) +{ + vector unsigned int table_copy, tmp, tmp1; + vector unsigned int one = (vector unsigned int) + { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; + vector unsigned int is_invalid; + unsigned int last_tag; + vector unsigned int has_been_reserved; + + last_tag = first_tag + number_of_tags; + + table_copy = spu_sl (one, number_of_tags); + table_copy = spu_rl (table_copy, -last_tag); + table_copy = spu_xor (table_copy, -1); + + /* Make sure the tags are in range and valid. */ + tmp = spu_cmpgt (spu_promote(last_tag, 0), 32); + tmp1 = spu_cmpgt (spu_promote(number_of_tags, 0), 32); + is_invalid = spu_cmpgt (spu_promote(first_tag, 0), 31); + + /* All bits are set to 1 if invalid, 0 if valid. */ + is_invalid = spu_or (tmp, is_invalid); + is_invalid = spu_or (tmp1, is_invalid); + + /* check whether these tags have been reserved */ + tmp = spu_rlmask (one, (int)-number_of_tags); + tmp1 = spu_sl (__mfc_tag_table, first_tag); + has_been_reserved = spu_cmpgt(tmp1, tmp); + + is_invalid = spu_or (has_been_reserved, is_invalid); + + table_copy = spu_sel (__mfc_tag_table, table_copy, table_copy); + __mfc_tag_table = spu_sel (table_copy, __mfc_tag_table, is_invalid); + + return spu_extract (is_invalid, 0); +} + |