Overview
Comment: | Add assembly implementation for OF_BSWAP{16,32,64} for x86 and AMD64. |
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SHA3-256: |
42aaecc3cdfdf8572f35d48d549cc3cc |
User & Date: | js on 2009-08-28 02:12:23 |
Other Links: | manifest | tags |
Context
2009-08-28
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17:57 | Fix a bug in OFHashing (SHA1 didn't cache correctly in -[digit]). check-in: 6a0ac6a3f1 user: js tags: trunk | |
02:12 | Add assembly implementation for OF_BSWAP{16,32,64} for x86 and AMD64. check-in: 42aaecc3cd user: js tags: trunk | |
00:33 | Add OF_BSWAP{16,32,64}_IF_{BE,LE} for conditional byte swap. check-in: 30f6c422ad user: js tags: trunk | |
Changes
Modified src/OFMacros.h from [8a995369a7] to [7562b69891].
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21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | #define OF_LIKELY(cond) __builtin_expect(!!(cond), 1) #define OF_UNLIKELY(cond) __builtin_expect(!!(cond), 0) #else #define OF_INLINE inline #define OF_LIKELY(cond) cond #define OF_UNLIKELY(cond) cond #endif static OF_INLINE uint16_t OF_BSWAP16(uint16_t i) { i = (i & UINT16_C(0xFF00)) >> 8 | (i & UINT16_C(0x00FF)) << 8; return i; } static OF_INLINE uint32_t OF_BSWAP32(uint32_t i) { i = (i & UINT32_C(0xFF000000)) >> 24 | (i & UINT32_C(0x00FF0000)) >> 8 | (i & UINT32_C(0x0000FF00)) << 8 | (i & UINT32_C(0x000000FF)) << 24; return i; } static OF_INLINE uint64_t OF_BSWAP64(uint64_t i) { i = (i & UINT64_C(0xFF00000000000000)) >> 56 | (i & UINT64_C(0x00FF000000000000)) >> 40 | (i & UINT64_C(0x0000FF0000000000)) >> 24 | (i & UINT64_C(0x000000FF00000000)) >> 8 | (i & UINT64_C(0x00000000FF000000)) << 8 | (i & UINT64_C(0x0000000000FF0000)) << 24 | (i & UINT64_C(0x000000000000FF00)) << 40 | (i & UINT64_C(0x00000000000000FF)) << 56; return i; } static OF_INLINE void OF_BSWAP32_V(uint32_t *buf, size_t len) { while (len--) { | > > > > > > > > > > > > > > > > > > > > > > > > | 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | #define OF_LIKELY(cond) __builtin_expect(!!(cond), 1) #define OF_UNLIKELY(cond) __builtin_expect(!!(cond), 0) #else #define OF_INLINE inline #define OF_LIKELY(cond) cond #define OF_UNLIKELY(cond) cond #endif #ifdef __GNUC__ #if defined(__amd64__) || defined(__x86_64__) #define OF_AMD64_ASM #elif defined(__i386__) #define OF_X86_ASM #endif #endif static OF_INLINE uint16_t OF_BSWAP16(uint16_t i) { #if defined(OF_X86_ASM) || defined(OF_AMD64_ASM) asm("xchgb %h0, %b0" : "=Q"(i) : "Q"(i)); #else i = (i & UINT16_C(0xFF00)) >> 8 | (i & UINT16_C(0x00FF)) << 8; #endif return i; } static OF_INLINE uint32_t OF_BSWAP32(uint32_t i) { #if defined(OF_X86_ASM) || defined(OF_AMD64_ASM) asm("bswap %0" : "=q"(i) : "q"(i)); #else i = (i & UINT32_C(0xFF000000)) >> 24 | (i & UINT32_C(0x00FF0000)) >> 8 | (i & UINT32_C(0x0000FF00)) << 8 | (i & UINT32_C(0x000000FF)) << 24; #endif return i; } static OF_INLINE uint64_t OF_BSWAP64(uint64_t i) { #if defined(OF_AMD64_ASM) asm("bswap %0" : "=r"(i) : "r"(i)); #elif defined(OF_X86_ASM) asm("bswap %%eax\n\t" "bswap %%edx\n\t" "xchgl %%eax, %%edx" : "=A"(i): "A"(i)); #else i = (i & UINT64_C(0xFF00000000000000)) >> 56 | (i & UINT64_C(0x00FF000000000000)) >> 40 | (i & UINT64_C(0x0000FF0000000000)) >> 24 | (i & UINT64_C(0x000000FF00000000)) >> 8 | (i & UINT64_C(0x00000000FF000000)) << 8 | (i & UINT64_C(0x0000000000FF0000)) << 24 | (i & UINT64_C(0x000000000000FF00)) << 40 | (i & UINT64_C(0x00000000000000FF)) << 56; #endif return i; } static OF_INLINE void OF_BSWAP32_V(uint32_t *buf, size_t len) { while (len--) { |
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