asm-offsets.c
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/*****************************************************************************
* asm-offsets.c: check asm offsets for aarch64
*****************************************************************************
* Copyright (C) 2014-2024 x264 project
*
* Authors: Janne Grunau <janne-x264@jannau.net>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at licensing@x264.com.
*****************************************************************************/
#include "common/common.h"
#include "asm-offsets.h"
#define STATIC_ASSERT(name, x) int assert_##name[2 * !!(x) - 1]
#define X264_CHECK_OFFSET(s, m, o) struct check_##s##_##m \
{ \
STATIC_ASSERT(offset_##m, offsetof(s, m) == o); \
}
#define X264_CHECK_REL_OFFSET(s, a, type, b) struct check_##s##_##a##_##b \
{ \
STATIC_ASSERT(rel_offset_##a##_##b, offsetof(s, a) + sizeof(type) == offsetof(s, b)); \
}
X264_CHECK_OFFSET(x264_cabac_t, i_low, CABAC_I_LOW);
X264_CHECK_OFFSET(x264_cabac_t, i_range, CABAC_I_RANGE);
X264_CHECK_OFFSET(x264_cabac_t, i_queue, CABAC_I_QUEUE);
X264_CHECK_OFFSET(x264_cabac_t, i_bytes_outstanding, CABAC_I_BYTES_OUTSTANDING);
X264_CHECK_OFFSET(x264_cabac_t, p_start, CABAC_P_START);
X264_CHECK_OFFSET(x264_cabac_t, p, CABAC_P);
X264_CHECK_OFFSET(x264_cabac_t, p_end, CABAC_P_END);
X264_CHECK_OFFSET(x264_cabac_t, f8_bits_encoded, CABAC_F8_BITS_ENCODED);
X264_CHECK_OFFSET(x264_cabac_t, state, CABAC_STATE);
// the aarch64 asm makes following additional assumptions about the x264_cabac_t
// memory layout
X264_CHECK_REL_OFFSET(x264_cabac_t, i_low, int, i_range);
X264_CHECK_REL_OFFSET(x264_cabac_t, i_queue, int, i_bytes_outstanding);