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Diffstat (limited to 'wcap/mem_ops_aligned.h')
| -rw-r--r-- | wcap/mem_ops_aligned.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/wcap/mem_ops_aligned.h b/wcap/mem_ops_aligned.h new file mode 100644 index 00000000..0fbba65e --- /dev/null +++ b/wcap/mem_ops_aligned.h @@ -0,0 +1,157 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + + +/* \file + * \brief Provides portable memory access primitives for operating on aligned + * data + * + * This file is split from mem_ops.h for easier maintenance. See mem_ops.h + * for a more detailed description of these primitives. + */ +#ifndef INCLUDED_BY_MEM_OPS_H +#error Include mem_ops.h, not mem_ops_aligned.h directly. +#endif + +/* Architectures that provide instructions for doing this byte swapping + * could redefine these macros. + */ +#define swap_endian_16(val,raw) do {\ + val = ((raw>>8) & 0x00ff) \ + | ((raw<<8) & 0xff00);\ + } while(0) +#define swap_endian_32(val,raw) do {\ + val = ((raw>>24) & 0x000000ff) \ + | ((raw>>8) & 0x0000ff00) \ + | ((raw<<8) & 0x00ff0000) \ + | ((raw<<24) & 0xff000000); \ + } while(0) +#define swap_endian_16_se(val,raw) do {\ + swap_endian_16(val,raw);\ + val = ((val << 16) >> 16);\ + } while(0) +#define swap_endian_32_se(val,raw) swap_endian_32(val,raw) + +#define mem_get_ne_aligned_generic(end,sz) \ + static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\ + const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\ + return *mem;\ + } + +#define mem_get_sne_aligned_generic(end,sz) \ + static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\ + const int##sz##_t *mem = (const int##sz##_t *)vmem;\ + return *mem;\ + } + +#define mem_get_se_aligned_generic(end,sz) \ + static unsigned MEM_VALUE_T mem_get_##end##sz##_aligned(const void *vmem) {\ + const uint##sz##_t *mem = (const uint##sz##_t *)vmem;\ + unsigned MEM_VALUE_T val, raw = *mem;\ + swap_endian_##sz(val,raw);\ + return val;\ + } + +#define mem_get_sse_aligned_generic(end,sz) \ + static signed MEM_VALUE_T mem_get_s##end##sz##_aligned(const void *vmem) {\ + const int##sz##_t *mem = (const int##sz##_t *)vmem;\ + unsigned MEM_VALUE_T val, raw = *mem;\ + swap_endian_##sz##_se(val,raw);\ + return val;\ + } + +#define mem_put_ne_aligned_generic(end,sz) \ + static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\ + uint##sz##_t *mem = (uint##sz##_t *)vmem;\ + *mem = (uint##sz##_t)val;\ + } + +#define mem_put_se_aligned_generic(end,sz) \ + static void mem_put_##end##sz##_aligned(void *vmem, MEM_VALUE_T val) {\ + uint##sz##_t *mem = (uint##sz##_t *)vmem, raw;\ + swap_endian_##sz(raw,val);\ + *mem = (uint##sz##_t)raw;\ + } + +#include "vpx_config.h" +#if CONFIG_BIG_ENDIAN +#define mem_get_be_aligned_generic(sz) mem_get_ne_aligned_generic(be,sz) +#define mem_get_sbe_aligned_generic(sz) mem_get_sne_aligned_generic(be,sz) +#define mem_get_le_aligned_generic(sz) mem_get_se_aligned_generic(le,sz) +#define mem_get_sle_aligned_generic(sz) mem_get_sse_aligned_generic(le,sz) +#define mem_put_be_aligned_generic(sz) mem_put_ne_aligned_generic(be,sz) +#define mem_put_le_aligned_generic(sz) mem_put_se_aligned_generic(le,sz) +#else +#define mem_get_be_aligned_generic(sz) mem_get_se_aligned_generic(be,sz) +#define mem_get_sbe_aligned_generic(sz) mem_get_sse_aligned_generic(be,sz) +#define mem_get_le_aligned_generic(sz) mem_get_ne_aligned_generic(le,sz) +#define mem_get_sle_aligned_generic(sz) mem_get_sne_aligned_generic(le,sz) +#define mem_put_be_aligned_generic(sz) mem_put_se_aligned_generic(be,sz) +#define mem_put_le_aligned_generic(sz) mem_put_ne_aligned_generic(le,sz) +#endif + +#undef mem_get_be16_aligned +#define mem_get_be16_aligned mem_ops_wrap_symbol(mem_get_be16_aligned) +mem_get_be_aligned_generic(16); + +#undef mem_get_be32_aligned +#define mem_get_be32_aligned mem_ops_wrap_symbol(mem_get_be32_aligned) +mem_get_be_aligned_generic(32); + +#undef mem_get_le16_aligned +#define mem_get_le16_aligned mem_ops_wrap_symbol(mem_get_le16_aligned) +mem_get_le_aligned_generic(16); + +#undef mem_get_le32_aligned +#define mem_get_le32_aligned mem_ops_wrap_symbol(mem_get_le32_aligned) +mem_get_le_aligned_generic(32); + +#undef mem_get_sbe16_aligned +#define mem_get_sbe16_aligned mem_ops_wrap_symbol(mem_get_sbe16_aligned) +mem_get_sbe_aligned_generic(16); + +#undef mem_get_sbe32_aligned +#define mem_get_sbe32_aligned mem_ops_wrap_symbol(mem_get_sbe32_aligned) +mem_get_sbe_aligned_generic(32); + +#undef mem_get_sle16_aligned +#define mem_get_sle16_aligned mem_ops_wrap_symbol(mem_get_sle16_aligned) +mem_get_sle_aligned_generic(16); + +#undef mem_get_sle32_aligned +#define mem_get_sle32_aligned mem_ops_wrap_symbol(mem_get_sle32_aligned) +mem_get_sle_aligned_generic(32); + +#undef mem_put_be16_aligned +#define mem_put_be16_aligned mem_ops_wrap_symbol(mem_put_be16_aligned) +mem_put_be_aligned_generic(16); + +#undef mem_put_be32_aligned +#define mem_put_be32_aligned mem_ops_wrap_symbol(mem_put_be32_aligned) +mem_put_be_aligned_generic(32); + +#undef mem_put_le16_aligned +#define mem_put_le16_aligned mem_ops_wrap_symbol(mem_put_le16_aligned) +mem_put_le_aligned_generic(16); + +#undef mem_put_le32_aligned +#define mem_put_le32_aligned mem_ops_wrap_symbol(mem_put_le32_aligned) +mem_put_le_aligned_generic(32); + +#undef mem_get_ne_aligned_generic +#undef mem_get_se_aligned_generic +#undef mem_get_sne_aligned_generic +#undef mem_get_sse_aligned_generic +#undef mem_put_ne_aligned_generic +#undef mem_put_se_aligned_generic +#undef swap_endian_16 +#undef swap_endian_32 +#undef swap_endian_16_se +#undef swap_endian_32_se |