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Added wyhash code and LICENSE, and removed temporary benchmark.

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pull/13171/head
Joshua Haberman 4 years ago
parent 15e20636c3
commit 723cd8ffc1
3 changed files with 167 additions and 28 deletions
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  1. 28
      benchmarks/benchmark.cc
  2. 25
      third_party/wyhash/LICENSE
  3. 142
      third_party/wyhash/wyhash.h

28
benchmarks/benchmark.cc
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@ -20,34 +20,6 @@ namespace protobuf = ::google::protobuf;
/* A buffer big enough to parse descriptor.proto without going to heap. */
char buf[65535];
static void BM_LoadDescriptor(benchmark::State& state) {
FILE *f = fopen("/tmp/ads-descriptor.pb", "rb");
fseek(f, 0, SEEK_END);
size_t size = ftell(f);
fseek(f, 0, SEEK_SET);
std::string str(size, '\0');
fread(&str[0], 1, size, f);
fclose(f);
fprintf(stderr, "size: %zu\n", str.size());
for (auto _ : state) {
upb::SymbolTable symtab;
upb::Arena arena;
google_protobuf_FileDescriptorSet* set =
google_protobuf_FileDescriptorSet_parse(str.data(), str.size(),
arena.ptr());
const google_protobuf_FileDescriptorProto*const * files =
google_protobuf_FileDescriptorSet_file(set, &size);
for (size_t i = 0; i < size; i++) {
upb::FileDefPtr file_def = symtab.AddFile(files[i], NULL);
if (!file_def) {
printf("Failed to add file.\n");
exit(1);
}
}
}
}
BENCHMARK(BM_LoadDescriptor);
static void BM_ArenaOneAlloc(benchmark::State& state) {
for (auto _ : state) {
upb_arena* arena = upb_arena_new();

25
third_party/wyhash/LICENSE vendored
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@ -0,0 +1,25 @@
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.
In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
For more information, please refer to <http://unlicense.org/>

142
third_party/wyhash/wyhash.h vendored
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@ -0,0 +1,142 @@
//Author: Wang Yi <godspeed_china@yeah.net>
#ifndef wyhash_final_version
#define wyhash_final_version
//defines that change behavior
#ifndef WYHASH_CONDOM
#define WYHASH_CONDOM 1 //0: read 8 bytes before and after boudaries, dangerous but fastest. 1: normal valid behavior 2: extra protection against entropy loss (probability=2^-63), aka. "blind multiplication"
#endif
#define WYHASH_32BIT_MUM 0 //faster on 32 bit system
//includes
#include <stdint.h>
#include <string.h>
#if defined(_MSC_VER) && defined(_M_X64)
#include <intrin.h>
#pragma intrinsic(_umul128)
#endif
#if defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__clang__)
#define _likely_(x) __builtin_expect(x,1)
#define _unlikely_(x) __builtin_expect(x,0)
#else
#define _likely_(x) (x)
#define _unlikely_(x) (x)
#endif
//mum function
static inline uint64_t _wyrot(uint64_t x) { return (x>>32)|(x<<32); }
static inline void _wymum(uint64_t *A, uint64_t *B){
#if(WYHASH_32BIT_MUM)
uint64_t hh=(*A>>32)*(*B>>32), hl=(*A>>32)*(unsigned)*B, lh=(unsigned)*A*(*B>>32), ll=(uint64_t)(unsigned)*A*(unsigned)*B;
#if(WYHASH_CONDOM>1)
*A^=_wyrot(hl)^hh; *B^=_wyrot(lh)^ll;
#else
*A=_wyrot(hl)^hh; *B=_wyrot(lh)^ll;
#endif
#elif defined(__SIZEOF_INT128__)
__uint128_t r=*A; r*=*B;
#if(WYHASH_CONDOM>1)
*A^=(uint64_t)r; *B^=(uint64_t)(r>>64);
#else
*A=(uint64_t)r; *B=(uint64_t)(r>>64);
#endif
#elif defined(_MSC_VER) && defined(_M_X64)
#if(WYHASH_CONDOM>1)
uint64_t a, b;
a=_umul128(*A,*B,&b);
*A^=a; *B^=b;
#else
*A=_umul128(*A,*B,B);
#endif
#else
uint64_t ha=*A>>32, hb=*B>>32, la=(uint32_t)*A, lb=(uint32_t)*B, hi, lo;
uint64_t rh=ha*hb, rm0=ha*lb, rm1=hb*la, rl=la*lb, t=rl+(rm0<<32), c=t<rl;
lo=t+(rm1<<32); c+=lo<t; hi=rh+(rm0>>32)+(rm1>>32)+c;
#if(WYHASH_CONDOM>1)
*A^=lo; *B^=hi;
#else
*A=lo; *B=hi;
#endif
#endif
}
static inline uint64_t _wymix(uint64_t A, uint64_t B){ _wymum(&A,&B); return A^B; }
//read functions
#ifndef WYHASH_LITTLE_ENDIAN
#if defined(_WIN32) || defined(__LITTLE_ENDIAN__) || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define WYHASH_LITTLE_ENDIAN 1
#elif defined(__BIG_ENDIAN__) || (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define WYHASH_LITTLE_ENDIAN 0
#endif
#endif
#if (WYHASH_LITTLE_ENDIAN)
static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return v;}
static inline uint64_t _wyr4(const uint8_t *p) { unsigned v; memcpy(&v, p, 4); return v;}
#elif defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__clang__)
static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return __builtin_bswap64(v);}
static inline uint64_t _wyr4(const uint8_t *p) { unsigned v; memcpy(&v, p, 4); return __builtin_bswap32(v);}
#elif defined(_MSC_VER)
static inline uint64_t _wyr8(const uint8_t *p) { uint64_t v; memcpy(&v, p, 8); return _byteswap_uint64(v);}
static inline uint64_t _wyr4(const uint8_t *p) { unsigned v; memcpy(&v, p, 4); return _byteswap_ulong(v);}
#endif
static inline uint64_t _wyr3(const uint8_t *p, unsigned k) { return (((uint64_t)p[0])<<16)|(((uint64_t)p[k>>1])<<8)|p[k-1];}
//wyhash function
static inline uint64_t _wyfinish16(const uint8_t *p, uint64_t len, uint64_t seed, const uint64_t *secret, uint64_t i){
#if(WYHASH_CONDOM>0)
uint64_t a, b;
if(_likely_(i<=8)){
if(_likely_(i>=4)){ a=_wyr4(p); b=_wyr4(p+i-4); }
else if (_likely_(i)){ a=_wyr3(p,i); b=0; }
else a=b=0;
}
else{ a=_wyr8(p); b=_wyr8(p+i-8); }
return _wymix(secret[1]^len,_wymix(a^secret[1], b^seed));
#else
#define oneshot_shift ((i<8)*((8-i)<<3))
return _wymix(secret[1]^len,_wymix((_wyr8(p)<<oneshot_shift)^secret[1],(_wyr8(p+i-8)>>oneshot_shift)^seed));
#endif
}
static inline uint64_t _wyfinish(const uint8_t *p, uint64_t len, uint64_t seed, const uint64_t *secret, uint64_t i){
if(_likely_(i<=16)) return _wyfinish16(p,len,seed,secret,i);
return _wyfinish(p+16,len,_wymix(_wyr8(p)^secret[1],_wyr8(p+8)^seed),secret,i-16);
}
static inline uint64_t wyhash(const void *key, uint64_t len, uint64_t seed, const uint64_t *secret){
const uint8_t *p=(const uint8_t *)key;
uint64_t i=len; seed^=*secret;
if(_unlikely_(i>64)){
uint64_t see1=seed;
do{
seed=_wymix(_wyr8(p)^secret[1],_wyr8(p+8)^seed)^_wymix(_wyr8(p+16)^secret[2],_wyr8(p+24)^seed);
see1=_wymix(_wyr8(p+32)^secret[3],_wyr8(p+40)^see1)^_wymix(_wyr8(p+48)^secret[4],_wyr8(p+56)^see1);
p+=64; i-=64;
}while(i>64);
seed^=see1;
}
return _wyfinish(p,len,seed,secret,i);
}
//utility functions
const uint64_t _wyp[5] = {0xa0761d6478bd642full, 0xe7037ed1a0b428dbull, 0x8ebc6af09c88c6e3ull, 0x589965cc75374cc3ull, 0x1d8e4e27c47d124full};
static inline uint64_t wyhash64(uint64_t A, uint64_t B){ A^=_wyp[0]; B^=_wyp[1]; _wymum(&A,&B); return _wymix(A^_wyp[0],B^_wyp[1]);}
static inline uint64_t wyrand(uint64_t *seed){ *seed+=_wyp[0]; return _wymix(*seed,*seed^_wyp[1]);}
static inline double wy2u01(uint64_t r){ const double _wynorm=1.0/(1ull<<52); return (r>>12)*_wynorm;}
static inline double wy2gau(uint64_t r){ const double _wynorm=1.0/(1ull<<20); return ((r&0x1fffff)+((r>>21)&0x1fffff)+((r>>42)&0x1fffff))*_wynorm-3.0;}
static inline uint64_t wy2u0k(uint64_t r, uint64_t k){ _wymum(&r,&k); return k; }
static inline void make_secret(uint64_t seed, uint64_t *secret){
uint8_t c[] = {15, 23, 27, 29, 30, 39, 43, 45, 46, 51, 53, 54, 57, 58, 60, 71, 75, 77, 78, 83, 85, 86, 89, 90, 92, 99, 101, 102, 105, 106, 108, 113, 114, 116, 120, 135, 139, 141, 142, 147, 149, 150, 153, 154, 156, 163, 165, 166, 169, 170, 172, 177, 178, 180, 184, 195, 197, 198, 201, 202, 204, 209, 210, 212, 216, 225, 226, 228, 232, 240 };
for(size_t i=0;i<5;i++){
uint8_t ok;
do{
ok=1; secret[i]=0;
for(size_t j=0;j<64;j+=8) secret[i]|=((uint64_t)c[wyrand(&seed)%sizeof(c)])<<j;
if(secret[i]%2==0){ ok=0; continue; }
for(size_t j=0;j<i;j++)
#if defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__clang__)
if(__builtin_popcountll(secret[j]^secret[i])!=32){ ok=0; break; }
#elif defined(_MSC_VER) && defined(_M_X64)
if(_mm_popcnt_u64(secret[j]^secret[i])!=32){ ok=0; break; }
#endif
if(!ok)continue;
for(uint64_t j=3;j<0x100000000ull;j+=2) if(secret[i]%j==0){ ok=0; break; }
}while(!ok);
}
}
#endif
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