73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <spu_mfcio.h>
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extern vector unsigned int __mfc_tag_table;
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/* Release a sequential group of tags from exclusive use. The sequential
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group of tags is the range starting from <first_tag> through
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<first_tag>+<number_of_tags>-1. Upon sucessful release, MFC_DMA_TAG_VALID
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is returned and the tags become available for future reservation.
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If the specified tags were not previously reserved, no action is
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taken and MFC_DMA_TAG_INVALID is returned. */
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unsigned int
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__mfc_multi_tag_release (unsigned int first_tag, unsigned int number_of_tags)
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{
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vector unsigned int table_copy, tmp, tmp1;
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vector unsigned int one = (vector unsigned int)
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{ 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
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vector unsigned int is_invalid;
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unsigned int last_tag;
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vector unsigned int has_been_reserved;
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last_tag = first_tag + number_of_tags;
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table_copy = spu_sl (one, number_of_tags);
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table_copy = spu_rl (table_copy, -last_tag);
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table_copy = spu_xor (table_copy, -1);
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/* Make sure the tags are in range and valid. */
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tmp = spu_cmpgt (spu_promote(last_tag, 0), 32);
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tmp1 = spu_cmpgt (spu_promote(number_of_tags, 0), 32);
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is_invalid = spu_cmpgt (spu_promote(first_tag, 0), 31);
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/* All bits are set to 1 if invalid, 0 if valid. */
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is_invalid = spu_or (tmp, is_invalid);
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is_invalid = spu_or (tmp1, is_invalid);
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/* check whether these tags have been reserved */
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tmp = spu_rlmask (one, (int)-number_of_tags);
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tmp1 = spu_sl (__mfc_tag_table, first_tag);
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has_been_reserved = spu_cmpgt(tmp1, tmp);
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is_invalid = spu_or (has_been_reserved, is_invalid);
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table_copy = spu_sel (__mfc_tag_table, table_copy, table_copy);
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__mfc_tag_table = spu_sel (table_copy, __mfc_tag_table, is_invalid);
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return spu_extract (is_invalid, 0);
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}
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