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