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https://github.com/VectorCamp/vectorscan.git
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97 lines
3.4 KiB
C
97 lines
3.4 KiB
C
/*
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* Copyright (c) 2015, Intel Corporation
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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 are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * 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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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* \brief Helper functions for unaligned loads and stores.
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*/
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#ifndef UNALIGNED_H
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#define UNALIGNED_H
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#include "ue2common.h"
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#define PACKED__MAY_ALIAS __attribute__((packed, may_alias))
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/// Perform an unaligned 16-bit load
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static really_inline
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u16 unaligned_load_u16(const void *ptr) {
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struct unaligned { u16 u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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const struct unaligned *uptr = (const struct unaligned *)ptr;
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return uptr->u;
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}
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/// Perform an unaligned 32-bit load
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static really_inline
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u32 unaligned_load_u32(const void *ptr) {
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struct unaligned { u32 u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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const struct unaligned *uptr = (const struct unaligned *)ptr;
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return uptr->u;
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}
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/// Perform an unaligned 64-bit load
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static really_inline
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u64a unaligned_load_u64a(const void *ptr) {
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struct unaligned { u64a u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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const struct unaligned *uptr = (const struct unaligned *)ptr;
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return uptr->u;
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}
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/// Perform an unaligned 16-bit store
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static really_inline
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void unaligned_store_u16(void *ptr, u16 val) {
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struct unaligned { u16 u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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struct unaligned *uptr = (struct unaligned *)ptr;
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uptr->u = val;
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}
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/// Perform an unaligned 32-bit store
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static really_inline
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void unaligned_store_u32(void *ptr, u32 val) {
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struct unaligned { u32 u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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struct unaligned *uptr = (struct unaligned *)ptr;
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uptr->u = val;
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}
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/// Perform an unaligned 64-bit store
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static really_inline
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void unaligned_store_u64a(void *ptr, u64a val) {
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struct unaligned { u64a u; } PACKED__MAY_ALIAS;
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// cppcheck-suppress cstyleCast
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struct unaligned *uptr = (struct unaligned *)ptr;
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uptr->u = val;
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}
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#undef PACKED__MAY_ALIAS
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#endif // UNALIGNED_H
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