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author | 2018-02-19 11:16:57 +0000 | |
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committer | 2018-02-19 11:17:28 +0000 | |
commit | ca33590b6af032bff57d9cc70455660466a654b2 (patch) | |
tree | 0b68b090bd9b4a78a3614b62400b29279d76d553 /lib/librte_sched/rte_reciprocal.c | |
parent | 169a9de21e263aa6599cdc2d87a45ae158d9f509 (diff) |
New upstream version 18.02upstream/18.02
Change-Id: I89ed24cb2a49b78fe5be6970b99dd46c1499fcc3
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
Diffstat (limited to 'lib/librte_sched/rte_reciprocal.c')
-rw-r--r-- | lib/librte_sched/rte_reciprocal.c | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/lib/librte_sched/rte_reciprocal.c b/lib/librte_sched/rte_reciprocal.c deleted file mode 100644 index 652f0237..00000000 --- a/lib/librte_sched/rte_reciprocal.c +++ /dev/null @@ -1,72 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) Hannes Frederic Sowa - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <stdio.h> -#include <stdint.h> - -#include <rte_common.h> - -#include "rte_reciprocal.h" - -/* find largest set bit. - * portable and slow but does not matter for this usage. - */ -static inline int fls(uint32_t x) -{ - int b; - - for (b = 31; b >= 0; --b) { - if (x & (1u << b)) - return b + 1; - } - - return 0; -} - -struct rte_reciprocal rte_reciprocal_value(uint32_t d) -{ - struct rte_reciprocal R; - uint64_t m; - int l; - - l = fls(d - 1); - m = ((1ULL << 32) * ((1ULL << l) - d)); - m /= d; - - ++m; - R.m = m; - R.sh1 = RTE_MIN(l, 1); - R.sh2 = RTE_MAX(l - 1, 0); - - return R; -} |