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Reorganise intreadwrite.h
This changes intreadwrite.h to support per-arch implementations of the various macros allowing us to take advantage of special instructions or other properties the compiler does not know about. Originally committed as revision 18600 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård
parent
d7670f2827
commit
a6783b8961
@ -23,119 +23,88 @@
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#include "config.h"
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#include "bswap.h"
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#ifdef __GNUC__
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/*
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* Arch-specific headers can provide any combination of
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* AV_[RW][BLN](16|32|64) macros. Preprocessor symbols must be
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* defined, even if these are implemented as inline functions.
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*/
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/*
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* Define AV_[RW]N helper macros to simplify definitions not provided
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* by per-arch headers.
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*/
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#if defined(__GNUC__)
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struct unaligned_64 { uint64_t l; } __attribute__((packed));
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struct unaligned_32 { uint32_t l; } __attribute__((packed));
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struct unaligned_16 { uint16_t l; } __attribute__((packed));
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#define AV_RN16(a) (((const struct unaligned_16 *) (a))->l)
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#define AV_RN32(a) (((const struct unaligned_32 *) (a))->l)
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#define AV_RN64(a) (((const struct unaligned_64 *) (a))->l)
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#define AV_WN16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
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#define AV_WN32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
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#define AV_WN64(a, b) (((struct unaligned_64 *) (a))->l) = (b)
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# define AV_RN(s, p) (((const struct unaligned_##s *) (p))->l)
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# define AV_WN(s, p, v) (((struct unaligned_##s *) (p))->l) = (v)
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#elif defined(__DECC)
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#define AV_RN16(a) (*((const __unaligned uint16_t*)(a)))
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#define AV_RN32(a) (*((const __unaligned uint32_t*)(a)))
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#define AV_RN64(a) (*((const __unaligned uint64_t*)(a)))
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# define AV_RN(s, p) (*((const __unaligned uint##s##_t*)(p)))
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# define AV_WN(s, p, v) *((__unaligned uint##s##_t*)(p)) = (v)
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#define AV_WN16(a, b) *((__unaligned uint16_t*)(a)) = (b)
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#define AV_WN32(a, b) *((__unaligned uint32_t*)(a)) = (b)
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#define AV_WN64(a, b) *((__unaligned uint64_t*)(a)) = (b)
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#elif HAVE_FAST_UNALIGNED
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# define AV_RN(s, p) (*((const uint##s##_t*)(p)))
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# define AV_WN(s, p, v) *((uint##s##_t*)(p)) = (v)
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#else
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#define AV_RN16(a) (*((const uint16_t*)(a)))
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#define AV_RN32(a) (*((const uint32_t*)(a)))
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#define AV_RN64(a) (*((const uint64_t*)(a)))
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#define AV_WN16(a, b) *((uint16_t*)(a)) = (b)
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#define AV_WN32(a, b) *((uint32_t*)(a)) = (b)
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#define AV_WN64(a, b) *((uint64_t*)(a)) = (b)
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#endif /* !__GNUC__ */
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/* endian macros */
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#define AV_RB8(x) (((const uint8_t*)(x))[0])
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#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
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#define AV_RL8(x) AV_RB8(x)
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#define AV_WL8(p, d) AV_WB8(p, d)
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#if HAVE_FAST_UNALIGNED
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# ifdef WORDS_BIGENDIAN
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# define AV_RB16(x) AV_RN16(x)
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# define AV_WB16(p, d) AV_WN16(p, d)
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# define AV_RL16(x) bswap_16(AV_RN16(x))
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# define AV_WL16(p, d) AV_WN16(p, bswap_16(d))
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# define AV_RB32(x) AV_RN32(x)
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# define AV_WB32(p, d) AV_WN32(p, d)
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# define AV_RL32(x) bswap_32(AV_RN32(x))
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# define AV_WL32(p, d) AV_WN32(p, bswap_32(d))
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# define AV_RB64(x) AV_RN64(x)
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# define AV_WB64(p, d) AV_WN64(p, d)
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# define AV_RL64(x) bswap_64(AV_RN64(x))
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# define AV_WL64(p, d) AV_WN64(p, bswap_64(d))
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# else /* WORDS_BIGENDIAN */
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# define AV_RB16(x) bswap_16(AV_RN16(x))
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# define AV_WB16(p, d) AV_WN16(p, bswap_16(d))
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# define AV_RL16(x) AV_RN16(x)
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# define AV_WL16(p, d) AV_WN16(p, d)
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# define AV_RB32(x) bswap_32(AV_RN32(x))
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# define AV_WB32(p, d) AV_WN32(p, bswap_32(d))
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# define AV_RL32(x) AV_RN32(x)
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# define AV_WL32(p, d) AV_WN32(p, d)
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# define AV_RB64(x) bswap_64(AV_RN64(x))
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# define AV_WB64(p, d) AV_WN64(p, bswap_64(d))
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# define AV_RL64(x) AV_RN64(x)
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# define AV_WL64(p, d) AV_WN64(p, d)
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# endif
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#else /* HAVE_FAST_UNALIGNED */
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#define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | ((const uint8_t*)(x))[1])
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#ifndef AV_RB16
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#define AV_RB16(x) ((((const uint8_t*)(x))[0] << 8) | \
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((const uint8_t*)(x))[1])
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#endif
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#ifndef AV_WB16
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#define AV_WB16(p, d) do { \
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((uint8_t*)(p))[1] = (d); \
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((uint8_t*)(p))[0] = (d)>>8; } while(0)
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#endif
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#ifndef AV_RL16
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#define AV_RL16(x) ((((const uint8_t*)(x))[1] << 8) | \
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((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL16
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#define AV_WL16(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; } while(0)
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#endif
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#ifndef AV_RB32
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#define AV_RB32(x) ((((const uint8_t*)(x))[0] << 24) | \
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(((const uint8_t*)(x))[1] << 16) | \
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(((const uint8_t*)(x))[2] << 8) | \
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((const uint8_t*)(x))[3])
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#endif
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#ifndef AV_WB32
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#define AV_WB32(p, d) do { \
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((uint8_t*)(p))[3] = (d); \
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((uint8_t*)(p))[2] = (d)>>8; \
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((uint8_t*)(p))[1] = (d)>>16; \
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((uint8_t*)(p))[0] = (d)>>24; } while(0)
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#endif
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#ifndef AV_RL32
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#define AV_RL32(x) ((((const uint8_t*)(x))[3] << 24) | \
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(((const uint8_t*)(x))[2] << 16) | \
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(((const uint8_t*)(x))[1] << 8) | \
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((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL32
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#define AV_WL32(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; \
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((uint8_t*)(p))[2] = (d)>>16; \
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((uint8_t*)(p))[3] = (d)>>24; } while(0)
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#endif
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#ifndef AV_RB64
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#define AV_RB64(x) (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
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((uint64_t)((const uint8_t*)(x))[1] << 48) | \
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((uint64_t)((const uint8_t*)(x))[2] << 40) | \
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@ -144,6 +113,8 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
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((uint64_t)((const uint8_t*)(x))[5] << 16) | \
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((uint64_t)((const uint8_t*)(x))[6] << 8) | \
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(uint64_t)((const uint8_t*)(x))[7])
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#endif
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#ifndef AV_WB64
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#define AV_WB64(p, d) do { \
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((uint8_t*)(p))[7] = (d); \
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((uint8_t*)(p))[6] = (d)>>8; \
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@ -153,7 +124,9 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
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((uint8_t*)(p))[2] = (d)>>40; \
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((uint8_t*)(p))[1] = (d)>>48; \
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((uint8_t*)(p))[0] = (d)>>56; } while(0)
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#endif
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#ifndef AV_RL64
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#define AV_RL64(x) (((uint64_t)((const uint8_t*)(x))[7] << 56) | \
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((uint64_t)((const uint8_t*)(x))[6] << 48) | \
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((uint64_t)((const uint8_t*)(x))[5] << 40) | \
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@ -162,6 +135,8 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
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((uint64_t)((const uint8_t*)(x))[2] << 16) | \
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((uint64_t)((const uint8_t*)(x))[1] << 8) | \
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(uint64_t)((const uint8_t*)(x))[0])
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#endif
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#ifndef AV_WL64
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#define AV_WL64(p, d) do { \
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((uint8_t*)(p))[0] = (d); \
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((uint8_t*)(p))[1] = (d)>>8; \
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@ -171,7 +146,101 @@ struct unaligned_16 { uint16_t l; } __attribute__((packed));
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((uint8_t*)(p))[5] = (d)>>40; \
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((uint8_t*)(p))[6] = (d)>>48; \
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((uint8_t*)(p))[7] = (d)>>56; } while(0)
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#endif /* HAVE_FAST_UNALIGNED */
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#endif
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#ifdef WORDS_BIGENDIAN
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# define AV_RN(s, p) AV_RB##s(p)
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# define AV_WN(s, p, v) AV_WB##s(p, v)
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#else
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# define AV_RN(s, p) AV_RL##s(p)
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# define AV_WN(s, p, v) AV_WL##s(p, v)
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#endif
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#endif /* HAVE_FAST_UNALIGNED */
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#ifndef AV_RN16
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# define AV_RN16(p) AV_RN(16, p)
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#endif
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#ifndef AV_RN32
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# define AV_RN32(p) AV_RN(32, p)
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#endif
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#ifndef AV_RN64
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# define AV_RN64(p) AV_RN(64, p)
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#endif
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#ifndef AV_WN16
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# define AV_WN16(p, v) AV_WN(16, p, v)
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#endif
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#ifndef AV_WN32
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# define AV_WN32(p, v) AV_WN(32, p, v)
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#endif
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#ifndef AV_WN64
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# define AV_WN64(p, v) AV_WN(64, p, v)
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#endif
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#ifdef WORDS_BIGENDIAN
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# define AV_RB(s, p) AV_RN(s, p)
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# define AV_WB(s, p, v) AV_WN(s, p, v)
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# define AV_RL(s, p) bswap_##s(AV_RN(s, p))
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# define AV_WL(s, p, v) AV_WN(s, p, bswap_##s(v))
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#else
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# define AV_RB(s, p) bswap_##s(AV_RN(s, p))
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# define AV_WB(s, p, v) AV_WN(s, p, bswap_##s(v))
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# define AV_RL(s, p) AV_RN(s, p)
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# define AV_WL(s, p, v) AV_WN(s, p, v)
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#endif
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#define AV_RB8(x) (((const uint8_t*)(x))[0])
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#define AV_WB8(p, d) do { ((uint8_t*)(p))[0] = (d); } while(0)
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#define AV_RL8(x) AV_RB8(x)
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#define AV_WL8(p, d) AV_WB8(p, d)
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#ifndef AV_RB16
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# define AV_RB16(p) AV_RB(16, p)
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#endif
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#ifndef AV_WB16
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# define AV_WB16(p, v) AV_WB(16, p, v)
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#endif
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#ifndef AV_RL16
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# define AV_RL16(p) AV_RL(16, p)
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#endif
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#ifndef AV_WL16
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# define AV_WL16(p, v) AV_WL(16, p, v)
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#endif
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#ifndef AV_RB32
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# define AV_RB32(p) AV_RB(32, p)
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#endif
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#ifndef AV_WB32
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# define AV_WB32(p, v) AV_WB(32, p, v)
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#endif
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#ifndef AV_RL32
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# define AV_RL32(p) AV_RL(32, p)
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#endif
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#ifndef AV_WL32
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# define AV_WL32(p, v) AV_WL(32, p, v)
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#endif
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#ifndef AV_RB64
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# define AV_RB64(p) AV_RB(64, p)
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#endif
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#ifndef AV_WB64
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# define AV_WB64(p, v) AV_WB(64, p, v)
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#endif
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#ifndef AV_RL64
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# define AV_RL64(p) AV_RL(64, p)
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#endif
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#ifndef AV_WL64
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# define AV_WL64(p, v) AV_WL(64, p, v)
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#endif
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#define AV_RB24(x) ((((const uint8_t*)(x))[0] << 16) | \
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(((const uint8_t*)(x))[1] << 8) | \
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