158 строки
5.5 KiB
C
158 строки
5.5 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/* \file
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* \brief Provides portable memory access primitives for operating on aligned
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* data
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*
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* This file is split from mem_ops.h for easier maintenance. See mem_ops.h
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* for a more detailed description of these primitives.
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*/
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#ifndef INCLUDED_BY_MEM_OPS_H
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#error Include mem_ops.h, not mem_ops_aligned.h directly.
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#endif
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/* Architectures that provide instructions for doing this byte swapping
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* could redefine these macros.
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*/
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#define swap_endian_16(val,raw) do {\
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val = ((raw>>8) & 0x00ff) \
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| ((raw<<8) & 0xff00);\
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} while(0)
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#define swap_endian_32(val,raw) do {\
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val = ((raw>>24) & 0x000000ff) \
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| ((raw>>8) & 0x0000ff00) \
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| ((raw<<8) & 0x00ff0000) \
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| ((raw<<24) & 0xff000000); \
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} while(0)
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#define swap_endian_16_se(val,raw) do {\
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swap_endian_16(val,raw);\
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val = ((val << 16) >> 16);\
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} while(0)
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#define swap_endian_32_se(val,raw) swap_endian_32(val,raw)
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#define mem_get_ne_aligned_generic(end,sz) \
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static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\
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const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
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return *mem;\
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}
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#define mem_get_sne_aligned_generic(end,sz) \
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static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\
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const int##sz##_t *mem = (const int##sz##_t *)vmem;\
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return *mem;\
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}
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#define mem_get_se_aligned_generic(end,sz) \
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static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\
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const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\
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unsigned MEM_VALUE_T val, raw = *mem;\
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swap_endian_##sz(val,raw);\
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return val;\
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}
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#define mem_get_sse_aligned_generic(end,sz) \
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static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\
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const int##sz##_t *mem = (const int##sz##_t *)vmem;\
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unsigned MEM_VALUE_T val, raw = *mem;\
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swap_endian_##sz##_se(val,raw);\
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return val;\
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}
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#define mem_put_ne_aligned_generic(end,sz) \
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static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
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uint##sz##_t *mem = (uint##sz##_t *)vmem;\
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*mem = (uint##sz##_t)val;\
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}
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#define mem_put_se_aligned_generic(end,sz) \
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static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\
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uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\
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swap_endian_##sz(raw,val);\
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*mem = (uint##sz##_t)raw;\
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}
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#include "vpx_config.h"
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#if CONFIG_BIG_ENDIAN
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#define mem_get_be_aligned_generic(sz) mem_get_ne_aligned_generic(be,sz)
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#define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz)
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#define mem_get_le_aligned_generic(sz) mem_get_se_aligned_generic(le,sz)
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#define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz)
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#define mem_put_be_aligned_generic(sz) mem_put_ne_aligned_generic(be,sz)
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#define mem_put_le_aligned_generic(sz) mem_put_se_aligned_generic(le,sz)
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#else
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#define mem_get_be_aligned_generic(sz) mem_get_se_aligned_generic(be,sz)
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#define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz)
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#define mem_get_le_aligned_generic(sz) mem_get_ne_aligned_generic(le,sz)
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#define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz)
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#define mem_put_be_aligned_generic(sz) mem_put_se_aligned_generic(be,sz)
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#define mem_put_le_aligned_generic(sz) mem_put_ne_aligned_generic(le,sz)
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#endif
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#undef mem_get_be16_aligned
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#define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned)
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mem_get_be_aligned_generic(16)
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#undef mem_get_be32_aligned
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#define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned)
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mem_get_be_aligned_generic(32)
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#undef mem_get_le16_aligned
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#define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned)
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mem_get_le_aligned_generic(16)
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#undef mem_get_le32_aligned
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#define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned)
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mem_get_le_aligned_generic(32)
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#undef mem_get_sbe16_aligned
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#define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned)
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mem_get_sbe_aligned_generic(16)
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#undef mem_get_sbe32_aligned
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#define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned)
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mem_get_sbe_aligned_generic(32)
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#undef mem_get_sle16_aligned
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#define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned)
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mem_get_sle_aligned_generic(16)
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#undef mem_get_sle32_aligned
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#define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned)
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mem_get_sle_aligned_generic(32)
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#undef mem_put_be16_aligned
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#define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned)
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mem_put_be_aligned_generic(16)
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#undef mem_put_be32_aligned
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#define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned)
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mem_put_be_aligned_generic(32)
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#undef mem_put_le16_aligned
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#define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned)
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mem_put_le_aligned_generic(16)
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#undef mem_put_le32_aligned
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#define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned)
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mem_put_le_aligned_generic(32)
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#undef mem_get_ne_aligned_generic
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#undef mem_get_se_aligned_generic
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#undef mem_get_sne_aligned_generic
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#undef mem_get_sse_aligned_generic
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#undef mem_put_ne_aligned_generic
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#undef mem_put_se_aligned_generic
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#undef swap_endian_16
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#undef swap_endian_32
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#undef swap_endian_16_se
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#undef swap_endian_32_se
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