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optimized endian conversion functions a bit

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This commit is contained in:
hyunghwan.chung 2019-05-03 04:53:44 +00:00
parent f1850b2a94
commit 63f2771879
2 changed files with 54 additions and 0 deletions
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23
moo/lib/moo-cmn.h
View File

@ -923,6 +923,19 @@ typedef struct moo_t moo_t;
#define MOO_HAVE_SYNC_VAL_COMPARE_AND_SWAP
#endif
#if __has_builtin(__builtin_bswap16)
#define MOO_HAVE_BUILTIN_BSWAP16
#endif
#if __has_builtin(__builtin_bswap32)
#define MOO_HAVE_BUILTIN_BSWAP32
#endif
#if __has_builtin(__builtin_bswap64)
#define MOO_HAVE_BUILTIN_BSWAP64
#endif
#if __has_builtin(__builtin_bswap128)
#define MOO_HAVE_BUILTIN_BSWAP128
#endif
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
#if (__GNUC__ >= 4)
@ -960,6 +973,16 @@ typedef struct moo_t moo_t;
#define MOO_HAVE_BUILTIN_SMULLL_OVERFLOW
#endif
#if (__GNUC__ >= 5) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
/* 4.8.0 or later */
#define MOO_HAVE_BUILTIN_BSWAP16
#endif
#if (__GNUC__ >= 5) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
/* 4.3.0 or later */
#define MOO_HAVE_BUILTIN_BSWAP32
#define MOO_HAVE_BUILTIN_BSWAP64
/*#define MOO_HAVE_BUILTIN_BSWAP128*/
#endif
#endif
#if defined(MOO_HAVE_BUILTIN_EXPECT)

31
moo/lib/moo-utl.h
View File

@ -743,23 +743,49 @@ MOO_EXPORT moo_oow_t moo_utf16_to_uc (
#if defined(MOO_HAVE_UINT16_T)
static MOO_INLINE moo_uint16_t moo_bswap16 (moo_uint16_t x)
{
#if defined(MOO_HAVE_BUILTIN_BSWAP16)
return __builtin_bswap16(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64) || defined(__i386) || defined(i386))
__asm__ volatile ("xchgb %b0, %h0" : "=Q"(x): "0"(x));
return x;
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_8__))
__asm__ volatile ("rev16 %0, %1" : "=&r"(x): "+r"(x));
return x;
#else
return (x << 8) | (x >> 8);
#endif
}
#endif
#if defined(MOO_HAVE_UINT32_T)
static MOO_INLINE moo_uint32_t moo_bswap32 (moo_uint32_t x)
{
#if defined(MOO_HAVE_BUILTIN_BSWAP32)
return __builtin_bswap32(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64) || defined(__i386) || defined(i386))
__asm__ volatile ("bswapl %0" : "=r"(x) : "0"(x));
return x;
#elif defined(__GNUC__) && defined(__arm__) && (defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_8__))
__asm__ volatile ("rev32 %0, %1" : "=&r"(x): "+r"(x));
return x;
#else
return ((x >> 24)) |
((x >> 8) & ((moo_uint32_t)0xff << 8)) |
((x << 8) & ((moo_uint32_t)0xff << 16)) |
((x << 24));
#endif
}
#endif
#if defined(MOO_HAVE_UINT64_T)
static MOO_INLINE moo_uint64_t moo_bswap64 (moo_uint64_t x)
{
#if defined(MOO_HAVE_BUILTIN_BSWAP64)
return __builtin_bswap64(x);
#elif defined(__GNUC__) && (defined(__x86_64) || defined(__amd64))
__asm__ volatile ("bswapq %0" : "=r"(x) : "0"(x));
return x;
#else
return ((x >> 56)) |
((x >> 40) & ((moo_uint64_t)0xff << 8)) |
((x >> 24) & ((moo_uint64_t)0xff << 16)) |
@ -768,12 +794,16 @@ static MOO_INLINE moo_uint64_t moo_bswap64 (moo_uint64_t x)
((x << 24) & ((moo_uint64_t)0xff << 40)) |
((x << 40) & ((moo_uint64_t)0xff << 48)) |
((x << 56));
#endif
}
#endif
#if defined(MOO_HAVE_UINT128_T)
static MOO_INLINE moo_uint128_t moo_bswap128 (moo_uint128_t x)
{
#if defined(MOO_HAVE_BUILTIN_BSWAP128)
return __builtin_bswap128(x);
#else
return ((x >> 120)) |
((x >> 104) & ((moo_uint128_t)0xff << 8)) |
((x >> 88) & ((moo_uint128_t)0xff << 16)) |
@ -790,6 +820,7 @@ static MOO_INLINE moo_uint128_t moo_bswap128 (moo_uint128_t x)
((x << 88) & ((moo_uint128_t)0xff << 104)) |
((x << 104) & ((moo_uint128_t)0xff << 112)) |
((x << 120));
#endif
}
#endif