FreeBSD kernel libkern code
ldivmod_helper.c
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/*
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2012 Andrew Turner
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID
(
"$FreeBSD$"
);
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#include <
libkern/quad.h
>
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/*
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* Helper for __aeabi_ldivmod.
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* TODO: __divdi3 calls __qdivrem. We should do the same and use the
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* remainder value rather than re-calculating it.
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*/
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long
long
__kern_ldivmod
(
long
long
,
long
long
,
long
long
*);
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long
long
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__kern_ldivmod
(
long
long
n,
long
long
m,
long
long
*rem)
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{
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long
long
q;
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q =
__divdi3
(n, m);
/* q = n / m */
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*rem = n - m * q;
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return
q;
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}
__divdi3
quad_t __divdi3(quad_t a, quad_t b)
Definition:
divdi3.c:46
__kern_ldivmod
long long __kern_ldivmod(long long, long long, long long *)
Definition:
ldivmod_helper.c:43
__FBSDID
__FBSDID("$FreeBSD$")
quad.h
libkern
arm
ldivmod_helper.c
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