boostorg/unordered
1
0
Fork 1
mirror of https://github.com/boostorg/unordered.git synced 2025-07-29 19:07:15 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add group14 prototype

Browse Source
This commit is contained in:
Christian Mazakas
2023-03-08 15:34:06 -08:00
parent 1bf193b8fc
commit b49fa571fb
1 changed files with 176 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

177
include/boost/unordered/detail/foa.hpp
View File

@ -326,6 +326,181 @@ private:
alignas(16) __m128i m;
};
struct group14
{
static constexpr int N=14;
static constexpr bool regular_layout=true;
struct dummy_group_type
{
alignas(16) unsigned char storage[N+2]={0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0};
};
inline void initialize(){m=_mm_setzero_si128();}
inline void set(std::size_t pos,std::size_t hash)
{
BOOST_ASSERT(pos<N);
at(pos)=reduced_hash(hash);
}
inline void set_sentinel()
{
at(N-1)=sentinel_;
}
inline bool is_sentinel(std::size_t pos)const
{
BOOST_ASSERT(pos<N);
return at(pos)==sentinel_;
}
static inline bool is_sentinel(unsigned char* pc)noexcept
{
return *pc==sentinel_;
}
inline void reset(std::size_t pos)
{
BOOST_ASSERT(pos<N);
at(pos)=available_;
}
static inline void reset(unsigned char* pc)
{
*pc=available_;
}
inline int match(std::size_t hash)const
{
return _mm_movemask_epi8(
_mm_cmpeq_epi8(m,_mm_set1_epi32(match_word(hash))))&0x3FFF;
}
inline bool is_not_overflowed(std::size_t hash)const
{
static constexpr unsigned shift[]={
0x0001,0x0002,0x0004,0x0008,0x0010,0x0020,0x0040,0x0080,
0x0100,0x0200,0x0400,0x0800,0x1000,0x2000,0x4000,0x8000
};
return !(overflow()&shift[hash%16]);
}
inline void mark_overflow(std::size_t hash)
{
auto r=static_cast<short>(1<<(hash%16));
auto x=_mm_setr_epi16(0,0,0,0,0,0,0,r);
m=_mm_or_si128(m,x);
// unsigned r=1<<(hash%16);
// unsigned char a=reinterpret_cast<unsigned char*>(&r)[0];
// unsigned char b=reinterpret_cast<unsigned char*>(&r)[1];
// at(N)|=a;
// at(N+1)|=b;
}
static inline bool maybe_caused_overflow(unsigned char* pc)
{
std::size_t pos=reinterpret_cast<uintptr_t>(pc)%sizeof(group14);
auto *pg=reinterpret_cast<group14*>(pc-pos);
return !pg->is_not_overflowed(*pc);
};
inline int match_available()const
{
return _mm_movemask_epi8(
_mm_cmpeq_epi8(m,_mm_setzero_si128()))&0x3FFF;
}
static inline bool is_occupied(unsigned char* pc)noexcept
{
return *pc!=available_;
}
inline int match_occupied()const
{
return (~match_available())&0x3FFF;
}
inline int match_really_occupied()const /* excluding sentinel */
{
return at(N-1)==sentinel_?match_occupied()&0x1FFF:match_occupied();
}
private:
static constexpr unsigned char available_=0,
sentinel_=1;
inline static int match_word(std::size_t hash)
{
static constexpr boost::uint32_t word[]=
{
0x10101010u,0x11111111u,0x02020202u,0x03030303u,0x04040404u,0x05050505u,0x06060606u,0x07070707u,
0x08080808u,0x09090909u,0x0A0A0A0Au,0x0B0B0B0Bu,0x0C0C0C0Cu,0x0D0D0D0Du,0x0E0E0E0Eu,0x0F0F0F0Fu,
0x10101010u,0x11111111u,0x12121212u,0x13131313u,0x14141414u,0x15151515u,0x16161616u,0x17171717u,
0x18181818u,0x19191919u,0x1A1A1A1Au,0x1B1B1B1Bu,0x1C1C1C1Cu,0x1D1D1D1Du,0x1E1E1E1Eu,0x1F1F1F1Fu,
0x20202020u,0x21212121u,0x22222222u,0x23232323u,0x24242424u,0x25252525u,0x26262626u,0x27272727u,
0x28282828u,0x29292929u,0x2A2A2A2Au,0x2B2B2B2Bu,0x2C2C2C2Cu,0x2D2D2D2Du,0x2E2E2E2Eu,0x2F2F2F2Fu,
0x30303030u,0x31313131u,0x32323232u,0x33333333u,0x34343434u,0x35353535u,0x36363636u,0x37373737u,
0x38383838u,0x39393939u,0x3A3A3A3Au,0x3B3B3B3Bu,0x3C3C3C3Cu,0x3D3D3D3Du,0x3E3E3E3Eu,0x3F3F3F3Fu,
0x40404040u,0x41414141u,0x42424242u,0x43434343u,0x44444444u,0x45454545u,0x46464646u,0x47474747u,
0x48484848u,0x49494949u,0x4A4A4A4Au,0x4B4B4B4Bu,0x4C4C4C4Cu,0x4D4D4D4Du,0x4E4E4E4Eu,0x4F4F4F4Fu,
0x50505050u,0x51515151u,0x52525252u,0x53535353u,0x54545454u,0x55555555u,0x56565656u,0x57575757u,
0x58585858u,0x59595959u,0x5A5A5A5Au,0x5B5B5B5Bu,0x5C5C5C5Cu,0x5D5D5D5Du,0x5E5E5E5Eu,0x5F5F5F5Fu,
0x60606060u,0x61616161u,0x62626262u,0x63636363u,0x64646464u,0x65656565u,0x66666666u,0x67676767u,
0x68686868u,0x69696969u,0x6A6A6A6Au,0x6B6B6B6Bu,0x6C6C6C6Cu,0x6D6D6D6Du,0x6E6E6E6Eu,0x6F6F6F6Fu,
0x70707070u,0x71717171u,0x72727272u,0x73737373u,0x74747474u,0x75757575u,0x76767676u,0x77777777u,
0x78787878u,0x79797979u,0x7A7A7A7Au,0x7B7B7B7Bu,0x7C7C7C7Cu,0x7D7D7D7Du,0x7E7E7E7Eu,0x7F7F7F7Fu,
0x80808080u,0x81818181u,0x82828282u,0x83838383u,0x84848484u,0x85858585u,0x86868686u,0x87878787u,
0x88888888u,0x89898989u,0x8A8A8A8Au,0x8B8B8B8Bu,0x8C8C8C8Cu,0x8D8D8D8Du,0x8E8E8E8Eu,0x8F8F8F8Fu,
0x90909090u,0x91919191u,0x92929292u,0x93939393u,0x94949494u,0x95959595u,0x96969696u,0x97979797u,
0x98989898u,0x99999999u,0x9A9A9A9Au,0x9B9B9B9Bu,0x9C9C9C9Cu,0x9D9D9D9Du,0x9E9E9E9Eu,0x9F9F9F9Fu,
0xA0A0A0A0u,0xA1A1A1A1u,0xA2A2A2A2u,0xA3A3A3A3u,0xA4A4A4A4u,0xA5A5A5A5u,0xA6A6A6A6u,0xA7A7A7A7u,
0xA8A8A8A8u,0xA9A9A9A9u,0xAAAAAAAAu,0xABABABABu,0xACACACACu,0xADADADADu,0xAEAEAEAEu,0xAFAFAFAFu,
0xB0B0B0B0u,0xB1B1B1B1u,0xB2B2B2B2u,0xB3B3B3B3u,0xB4B4B4B4u,0xB5B5B5B5u,0xB6B6B6B6u,0xB7B7B7B7u,
0xB8B8B8B8u,0xB9B9B9B9u,0xBABABABAu,0xBBBBBBBBu,0xBCBCBCBCu,0xBDBDBDBDu,0xBEBEBEBEu,0xBFBFBFBFu,
0xC0C0C0C0u,0xC1C1C1C1u,0xC2C2C2C2u,0xC3C3C3C3u,0xC4C4C4C4u,0xC5C5C5C5u,0xC6C6C6C6u,0xC7C7C7C7u,
0xC8C8C8C8u,0xC9C9C9C9u,0xCACACACAu,0xCBCBCBCBu,0xCCCCCCCCu,0xCDCDCDCDu,0xCECECECEu,0xCFCFCFCFu,
0xD0D0D0D0u,0xD1D1D1D1u,0xD2D2D2D2u,0xD3D3D3D3u,0xD4D4D4D4u,0xD5D5D5D5u,0xD6D6D6D6u,0xD7D7D7D7u,
0xD8D8D8D8u,0xD9D9D9D9u,0xDADADADAu,0xDBDBDBDBu,0xDCDCDCDCu,0xDDDDDDDDu,0xDEDEDEDEu,0xDFDFDFDFu,
0xE0E0E0E0u,0xE1E1E1E1u,0xE2E2E2E2u,0xE3E3E3E3u,0xE4E4E4E4u,0xE5E5E5E5u,0xE6E6E6E6u,0xE7E7E7E7u,
0xE8E8E8E8u,0xE9E9E9E9u,0xEAEAEAEAu,0xEBEBEBEBu,0xECECECECu,0xEDEDEDEDu,0xEEEEEEEEu,0xEFEFEFEFu,
0xF0F0F0F0u,0xF1F1F1F1u,0xF2F2F2F2u,0xF3F3F3F3u,0xF4F4F4F4u,0xF5F5F5F5u,0xF6F6F6F6u,0xF7F7F7F7u,
0xF8F8F8F8u,0xF9F9F9F9u,0xFAFAFAFAu,0xFBFBFBFBu,0xFCFCFCFCu,0xFDFDFDFDu,0xFEFEFEFEu,0xFFFFFFFFu,
};
return (int)word[narrow_cast<unsigned char>(hash)];
}
inline static unsigned char reduced_hash(std::size_t hash)
{
return narrow_cast<unsigned char>(match_word(hash));
}
inline unsigned char& at(std::size_t pos)
{
return reinterpret_cast<unsigned char*>(&m)[pos];
}
inline unsigned char at(std::size_t pos)const
{
return reinterpret_cast<const unsigned char*>(&m)[pos];
}
inline unsigned overflow()const
{
unsigned x=0;
reinterpret_cast<unsigned char*>(&x)[0]=at(N);
reinterpret_cast<unsigned char*>(&x)[1]=at(N+1);
return x;
}
alignas(16) __m128i m;
};
#elif defined(BOOST_UNORDERED_LITTLE_ENDIAN_NEON)
struct group15
@ -1272,7 +1447,7 @@ table:empty_value<Hash,0>,empty_value<Pred,1>,empty_value<Allocator,2>
using pred_base=empty_value<Pred,1>;
using allocator_base=empty_value<Allocator,2>;
using type_policy=TypePolicy;
using group_type=group15;
using group_type=group14;
static constexpr auto N=group_type::N;
using size_policy=pow2_size_policy;
using prober=pow2_quadratic_prober;