mirror of
https://github.com/ultimatepp/ultimatepp.git
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217 lines
8.8 KiB
C
217 lines
8.8 KiB
C
#if defined(CPU_UNALIGNED) && defined(CPU_LE)
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NOUBSAN inline int Peek16le(const void *ptr) { return *(const word *)ptr; }
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NOUBSAN inline int Peek32le(const void *ptr) { return *(const dword *)ptr; }
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NOUBSAN inline int64 Peek64le(const void *ptr) { return *(const int64 *)ptr; }
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NOUBSAN inline void Poke16le(const void *ptr, int val) { *(word *)ptr = val; }
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NOUBSAN inline void Poke32le(const void *ptr, int val) { *(dword *)ptr = val; }
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NOUBSAN inline void Poke64le(const void *ptr, int64 val) { *(int64 *)ptr = val; }
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#else
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inline int Peek16le(const void *ptr) { return MAKEWORD(((byte *)ptr)[0], ((byte *)ptr)[1]); }
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inline int Peek32le(const void *ptr) { return MAKELONG(Peek16le(ptr), Peek16le((byte *)ptr + 2)); }
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inline int64 Peek64le(const void *ptr) { return MAKEQWORD(Peek32le(ptr), Peek32le((byte *)ptr + 4)); }
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inline void Poke16le(const void *ptr, int val) { ((byte *)ptr)[0] = LOBYTE(val); ((byte *)ptr)[1] = HIBYTE(val); }
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inline void Poke32le(const void *ptr, int val) { Poke16le(ptr, LOWORD(val)); Poke16le((byte *)ptr + 2, HIWORD(val)); }
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inline void Poke64le(const void *ptr, int64 val) { Poke32le(ptr, LODWORD(val)); Poke32le((byte *)ptr + 4, HIDWORD(val)); }
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#endif
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inline int Peek16be(const void *ptr) { return MAKEWORD(((byte *)ptr)[1], ((byte *)ptr)[0]); }
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inline int Peek32be(const void *ptr) { return MAKELONG(Peek16be((byte *)ptr + 2), Peek16be(ptr)); }
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inline int64 Peek64be(const void *ptr) { return MAKEQWORD(Peek32be((byte *)ptr + 4), Peek32be(ptr)); }
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inline void Poke16be(const void *ptr, int val) { ((byte *)ptr)[1] = LOBYTE(val); ((byte *)ptr)[0] = HIBYTE(val); }
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inline void Poke32be(const void *ptr, int val) { Poke16be(ptr, HIWORD(val)); Poke16be((byte *)ptr + 2, LOWORD(val)); }
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inline void Poke64be(const void *ptr, int64 val) { Poke32be(ptr, HIDWORD(val)); Poke32be((byte *)ptr + 4, LODWORD(val)); }
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#ifdef CPU_LITTLE_ENDIAN
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#define MAKE2B(b0, b1) MAKEWORD(b0, b1)
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#define MAKE4B(b0, b1, b2, b3) MAKELONG(MAKEWORD(b0, b1), MAKEWORD(b2, b3))
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#define MAKE8B(b0, b1, b2, b3, b4, b5, b6, b7) MAKEQWORD(MAKE4B(b0, b1, b2, b3), MAKE4B(b4, b5, b6, b7))
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inline int Peek16(const void *ptr) { return Peek16le(ptr); }
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inline int Peek32(const void *ptr) { return Peek32le(ptr); }
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inline int64 Peek64(const void *ptr) { return Peek64le(ptr); }
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inline void Poke16(const void *ptr, int val) { Poke16le(ptr, val); }
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inline void Poke32(const void *ptr, int val) { Poke32le(ptr, val); }
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inline void Poke64(const void *ptr, int64 val) { Poke64le(ptr, val); }
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#else
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#define MAKE2B(b0, b1) MAKEWORD(b1, b0);
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#define MAKE4B(b0, b1, b2, b3) MAKELONG(MAKEWORD(b2, b3), MAKEWORD(b0, b1))
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#define MAKE8B(b0, b1, b2, b3, b4, b5, b6, b7) MAKEQWORD(MAKE4B(b7, b6, b5, b4), MAKE4B(b3, b2, b1, b0))
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inline int Peek16(const void *ptr) { return Peek16be(ptr); }
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inline int Peek32(const void *ptr) { return Peek32be(ptr); }
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inline int64 Peek64(const void *ptr) { return Peek64be(ptr); }
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inline void Poke16(const void *ptr, int val) { Poke16be(ptr, val); }
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inline void Poke32(const void *ptr, int val) { Poke32be(ptr, val); }
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inline void Poke64(const void *ptr, int64 val) { Poke64be(ptr, val); }
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#endif
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#if defined(CPU_X86) && defined(COMPILER_MSC)
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#ifdef COMPILER_GCC
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#ifdef CPU_64
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inline word SwapEndian16(word v) { __asm__("xchgb %b0,%h0" : "=Q" (v) : "0" (v)); return v; }
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inline int16 SwapEndian16(int16 v) { __asm__("xchgb %b0,%h0" : "=Q" (v) : "0" (v)); return v; }
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#else
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inline word SwapEndian16(word v) { __asm__("xchgb %b0,%h0" : "=q" (v) : "0" (v)); return v; }
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inline int16 SwapEndian16(int16 v) { __asm__("xchgb %b0,%h0" : "=q" (v) : "0" (v)); return v; }
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#endif
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inline dword SwapEndian32(dword v) { __asm__("bswap %0" : "=r" (v) : "0" (v)); return v; }
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inline int SwapEndian32(int v) { __asm__("bswap %0" : "=r" (v) : "0" (v)); return v; }
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#endif
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#ifdef COMPILER_MSC
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#pragma intrinsic (_byteswap_ushort, _byteswap_ulong, _byteswap_uint64, strlen)
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inline word SwapEndian16(word v) { return _byteswap_ushort(v); }
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inline int16 SwapEndian16(int16 v) { return _byteswap_ushort(v); }
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inline dword SwapEndian32(dword v) { return _byteswap_ulong(v); }
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inline int SwapEndian32(int v) { return _byteswap_ulong(v); }
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#endif
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inline void EndianSwap(word& v) { v = SwapEndian16(v); }
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inline void EndianSwap(int16& v) { v = SwapEndian16(v); }
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inline void EndianSwap(dword& v) { v = SwapEndian32(v); }
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inline void EndianSwap(int& v) { v = SwapEndian32(v); }
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#else
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#ifdef COMPILER_GCC
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inline dword SwapEndian32(dword v) { return __builtin_bswap32(v); }
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inline int SwapEndian32(int v) { return __builtin_bswap32(v); }
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inline word SwapEndian16(word v) { return SwapEndian32(v) >> 16; } // GCC bug workaround
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inline int16 SwapEndian16(int16 v) { return SwapEndian32(v) >> 16; }
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inline void EndianSwap(word& v) { v = SwapEndian16(v); }
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inline void EndianSwap(int16& v) { v = SwapEndian16(v); }
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inline void EndianSwap(dword& v) { v = SwapEndian32(v); }
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inline void EndianSwap(int& v) { v = SwapEndian32(v); }
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#else
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inline void EndianSwap(word& v) { byte *x = (byte *)(&v); Swap(x[0], x[1]); }
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inline void EndianSwap(int16& v) { EndianSwap(*(word *)&v); }
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inline void EndianSwap(dword& v) { byte *x = (byte *)&v; Swap(x[0], x[3]); Swap(x[1], x[2]); }
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inline void EndianSwap(int& v) { EndianSwap(*(dword *)&v); }
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inline word SwapEndian16(word v) { EndianSwap(v); return v; }
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inline int16 SwapEndian16(int16 v) { EndianSwap(v); return v; }
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inline dword SwapEndian32(dword v) { EndianSwap(v); return v; }
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inline int SwapEndian32(int v) { EndianSwap(v); return v; }
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#endif
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#endif
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#if defined(CPU_AMD64) && (defined(COMPILER_GCC) || defined(COMPILER_MSC))
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#ifdef COMPILER_GCC
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inline uint64 SwapEndian64(uint64 v) { __asm__("bswap %0" : "=r" (v) : "0" (v)); return v; }
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inline int64 SwapEndian64(int64 v) { __asm__("bswap %0" : "=r" (v) : "0" (v)); return v; }
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#endif
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#ifdef COMPILER_MSC
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inline uint64 SwapEndian64(uint64 v) { return _byteswap_uint64(v); }
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inline int64 SwapEndian64(int64 v) { return _byteswap_uint64(v); }
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#endif
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inline void EndianSwap(int64& v) { v = SwapEndian64(v); }
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inline void EndianSwap(uint64& v) { v = SwapEndian64(v); }
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#else
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#ifdef COMPILER_GCC
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inline uint64 SwapEndian64(uint64 v) { return __builtin_bswap64(v); }
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inline int64 SwapEndian64(int64 v) { return __builtin_bswap64(v); }
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inline void EndianSwap(int64& v) { v = SwapEndian64(v); }
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inline void EndianSwap(uint64& v) { v = SwapEndian64(v); }
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#else
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inline void EndianSwap(int64& v) { byte *x = (byte *)&v; Swap(x[0], x[7]); Swap(x[1], x[6]); Swap(x[2], x[5]); Swap(x[3], x[4]); }
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inline void EndianSwap(uint64& v) { EndianSwap(*(int64 *)&v); }
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inline int64 SwapEndian64(int64 v) { EndianSwap(v); return v; }
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inline uint64 SwapEndian64(uint64 v) { EndianSwap(v); return v; }
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#endif
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#endif
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inline word SwapEndian16(int w) { return SwapEndian16((word)w); }
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inline word SwapEndian16(dword w) { return SwapEndian16((word)w); }
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void EndianSwap(word *v, size_t count);
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void EndianSwap(int16 *v, size_t count);
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void EndianSwap(dword *v, size_t count);
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void EndianSwap(int *v, size_t count);
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void EndianSwap(int64 *v, size_t count);
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void EndianSwap(uint64 *v, size_t count);
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#ifdef CPU_64
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#define HASH64
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#define HASH_CONST1 I64(0xf7c21089bee7c0a5)
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#define HASH_CONST2 I64(0xc85abc8da7534a4d)
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#define HASH_CONST3 I64(0x8642b0fe3e86671b)
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typedef qword hash_t;
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inline dword FoldHash(qword h)
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{
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return (dword)SwapEndian64(HASH_CONST3 * h);
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}
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#else
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#define HASH_CONST1 0xbee7c0a5
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#define HASH_CONST2 0xa7534a4d
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#define HASH_CONST3 0x8e86671b
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typedef dword hash_t;
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inline dword FoldHash(dword h)
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{
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return SwapEndian32(HASH_CONST3 * h);
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}
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#endif
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force_inline
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int SignificantBits(dword x)
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{ // basically log2(x) + 1 except that for 0 this is 0, number of significant bits of x
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#ifdef COMPILER_MSC
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DWORD index;
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return _BitScanReverse(&index, x) ? index + 1 : 0;
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#else
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return x ? 32 - __builtin_clz(x) : 0;
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#endif
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}
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force_inline
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int SignificantBits64(uint64 x)
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{ // basically log2(x) + 1 except that for 0 this is 0, number of significant bits of x
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#ifdef COMPILER_MSC
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#ifdef CPU_64
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DWORD index;
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return _BitScanReverse64(&index, x) ? index + 1 : 0;
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#else
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if(x & 0xffffffff00000000)
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return SignificantBits(HIDWORD(x)) + 32;
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else
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return SignificantBits((DWORD)x);
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#endif
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#else
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return x ? 64 - __builtin_clzll(x) : 0;
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#endif
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}
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inline bool FitsInInt64(double x)
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{
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return x >= -9223372036854775808.0 && x < 9223372036854775808.0;
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}
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