mirror of
https://github.com/citra-emu/citra.git
synced 2024-11-22 07:00:06 +00:00
Common: Remove hash.cpp/h
Currently unused and the code quality is pretty questionable.
This commit is contained in:
Yuri Kunde Schlesner
parent
fae5933ad6
commit
d9df5b575a
@ -5,7 +5,6 @@ set(SRCS
|
||||
break_points.cpp
|
||||
emu_window.cpp
|
||||
file_util.cpp
|
||||
hash.cpp
|
||||
key_map.cpp
|
||||
logging/filter.cpp
|
||||
logging/text_formatter.cpp
|
||||
@ -36,7 +35,6 @@ set(HEADERS
|
||||
emu_window.h
|
||||
fifo_queue.h
|
||||
file_util.h
|
||||
hash.h
|
||||
key_map.h
|
||||
linear_disk_cache.h
|
||||
logging/text_formatter.h
|
||||
|
||||
@ -1,524 +0,0 @@
|
||||
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include <algorithm>
|
||||
|
||||
#include "common/common_funcs.h" // For rotl
|
||||
#include "common/hash.h"
|
||||
#include "common/platform.h"
|
||||
|
||||
#if _M_SSE >= 0x402
|
||||
#include "common/cpu_detect.h"
|
||||
#include <nmmintrin.h>
|
||||
#endif
|
||||
|
||||
static u64 (*ptrHashFunction)(const u8 *src, int len, u32 samples) = &GetMurmurHash3;
|
||||
|
||||
// uint32_t
|
||||
// WARNING - may read one more byte!
|
||||
// Implementation from Wikipedia.
|
||||
u32 HashFletcher(const u8* data_u8, size_t length)
|
||||
{
|
||||
const u16* data = (const u16*)data_u8; /* Pointer to the data to be summed */
|
||||
size_t len = (length + 1) / 2; /* Length in 16-bit words */
|
||||
u32 sum1 = 0xffff, sum2 = 0xffff;
|
||||
|
||||
while (len)
|
||||
{
|
||||
size_t tlen = len > 360 ? 360 : len;
|
||||
len -= tlen;
|
||||
|
||||
do {
|
||||
sum1 += *data++;
|
||||
sum2 += sum1;
|
||||
}
|
||||
while (--tlen);
|
||||
|
||||
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
|
||||
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
|
||||
}
|
||||
|
||||
// Second reduction step to reduce sums to 16 bits
|
||||
sum1 = (sum1 & 0xffff) + (sum1 >> 16);
|
||||
sum2 = (sum2 & 0xffff) + (sum2 >> 16);
|
||||
return(sum2 << 16 | sum1);
|
||||
}
|
||||
|
||||
|
||||
// Implementation from Wikipedia
|
||||
// Slightly slower than Fletcher above, but slightly more reliable.
|
||||
#define MOD_ADLER 65521
|
||||
// data: Pointer to the data to be summed; len is in bytes
|
||||
u32 HashAdler32(const u8* data, size_t len)
|
||||
{
|
||||
u32 a = 1, b = 0;
|
||||
|
||||
while (len)
|
||||
{
|
||||
size_t tlen = len > 5550 ? 5550 : len;
|
||||
len -= tlen;
|
||||
|
||||
do
|
||||
{
|
||||
a += *data++;
|
||||
b += a;
|
||||
}
|
||||
while (--tlen);
|
||||
|
||||
a = (a & 0xffff) + (a >> 16) * (65536 - MOD_ADLER);
|
||||
b = (b & 0xffff) + (b >> 16) * (65536 - MOD_ADLER);
|
||||
}
|
||||
|
||||
// It can be shown that a <= 0x1013a here, so a single subtract will do.
|
||||
if (a >= MOD_ADLER)
|
||||
{
|
||||
a -= MOD_ADLER;
|
||||
}
|
||||
|
||||
// It can be shown that b can reach 0xfff87 here.
|
||||
b = (b & 0xffff) + (b >> 16) * (65536 - MOD_ADLER);
|
||||
|
||||
if (b >= MOD_ADLER)
|
||||
{
|
||||
b -= MOD_ADLER;
|
||||
}
|
||||
|
||||
return((b << 16) | a);
|
||||
}
|
||||
|
||||
// Stupid hash - but can't go back now :)
|
||||
// Don't use for new things. At least it's reasonably fast.
|
||||
u32 HashEctor(const u8* ptr, int length)
|
||||
{
|
||||
u32 crc = 0;
|
||||
|
||||
for (int i = 0; i < length; i++)
|
||||
{
|
||||
crc ^= ptr[i];
|
||||
crc = (crc << 3) | (crc >> 29);
|
||||
}
|
||||
|
||||
return(crc);
|
||||
}
|
||||
|
||||
|
||||
#if EMU_ARCH_BITS == 64
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
// Block read - if your platform needs to do endian-swapping or can only
|
||||
// handle aligned reads, do the conversion here
|
||||
|
||||
inline u64 getblock(const u64 * p, int i)
|
||||
{
|
||||
return p[i];
|
||||
}
|
||||
|
||||
//----------
|
||||
// Block mix - combine the key bits with the hash bits and scramble everything
|
||||
|
||||
inline void bmix64(u64 & h1, u64 & h2, u64 & k1, u64 & k2, u64 & c1, u64 & c2)
|
||||
{
|
||||
k1 *= c1;
|
||||
k1 = _rotl64(k1,23);
|
||||
k1 *= c2;
|
||||
h1 ^= k1;
|
||||
h1 += h2;
|
||||
|
||||
h2 = _rotl64(h2,41);
|
||||
|
||||
k2 *= c2;
|
||||
k2 = _rotl64(k2,23);
|
||||
k2 *= c1;
|
||||
h2 ^= k2;
|
||||
h2 += h1;
|
||||
|
||||
h1 = h1*3+0x52dce729;
|
||||
h2 = h2*3+0x38495ab5;
|
||||
|
||||
c1 = c1*5+0x7b7d159c;
|
||||
c2 = c2*5+0x6bce6396;
|
||||
}
|
||||
|
||||
//----------
|
||||
// Finalization mix - avalanches all bits to within 0.05% bias
|
||||
|
||||
inline u64 fmix64(u64 k)
|
||||
{
|
||||
k ^= k >> 33;
|
||||
k *= 0xff51afd7ed558ccd;
|
||||
k ^= k >> 33;
|
||||
k *= 0xc4ceb9fe1a85ec53;
|
||||
k ^= k >> 33;
|
||||
|
||||
return k;
|
||||
}
|
||||
|
||||
u64 GetMurmurHash3(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
const u8 * data = (const u8*)src;
|
||||
const int nblocks = len / 16;
|
||||
u32 Step = (len / 8);
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
|
||||
u64 h1 = 0x9368e53c2f6af274;
|
||||
u64 h2 = 0x586dcd208f7cd3fd;
|
||||
|
||||
u64 c1 = 0x87c37b91114253d5;
|
||||
u64 c2 = 0x4cf5ad432745937f;
|
||||
|
||||
|
||||
//----------
|
||||
// body
|
||||
|
||||
const u64 * blocks = (const u64 *)(data);
|
||||
|
||||
for(int i = 0; i < nblocks; i+=Step)
|
||||
{
|
||||
u64 k1 = getblock(blocks,i*2+0);
|
||||
u64 k2 = getblock(blocks,i*2+1);
|
||||
|
||||
bmix64(h1,h2,k1,k2,c1,c2);
|
||||
}
|
||||
|
||||
//----------
|
||||
// tail
|
||||
|
||||
const u8 * tail = (const u8*)(data + nblocks*16);
|
||||
|
||||
u64 k1 = 0;
|
||||
u64 k2 = 0;
|
||||
|
||||
switch(len & 15)
|
||||
{
|
||||
case 15: k2 ^= u64(tail[14]) << 48;
|
||||
case 14: k2 ^= u64(tail[13]) << 40;
|
||||
case 13: k2 ^= u64(tail[12]) << 32;
|
||||
case 12: k2 ^= u64(tail[11]) << 24;
|
||||
case 11: k2 ^= u64(tail[10]) << 16;
|
||||
case 10: k2 ^= u64(tail[ 9]) << 8;
|
||||
case 9: k2 ^= u64(tail[ 8]) << 0;
|
||||
|
||||
case 8: k1 ^= u64(tail[ 7]) << 56;
|
||||
case 7: k1 ^= u64(tail[ 6]) << 48;
|
||||
case 6: k1 ^= u64(tail[ 5]) << 40;
|
||||
case 5: k1 ^= u64(tail[ 4]) << 32;
|
||||
case 4: k1 ^= u64(tail[ 3]) << 24;
|
||||
case 3: k1 ^= u64(tail[ 2]) << 16;
|
||||
case 2: k1 ^= u64(tail[ 1]) << 8;
|
||||
case 1: k1 ^= u64(tail[ 0]) << 0;
|
||||
bmix64(h1,h2,k1,k2,c1,c2);
|
||||
};
|
||||
|
||||
//----------
|
||||
// finalization
|
||||
|
||||
h2 ^= len;
|
||||
|
||||
h1 += h2;
|
||||
h2 += h1;
|
||||
|
||||
h1 = fmix64(h1);
|
||||
h2 = fmix64(h2);
|
||||
|
||||
h1 += h2;
|
||||
|
||||
return h1;
|
||||
}
|
||||
|
||||
|
||||
// CRC32 hash using the SSE4.2 instruction
|
||||
u64 GetCRC32(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
#if _M_SSE >= 0x402
|
||||
u64 h = len;
|
||||
u32 Step = (len / 8);
|
||||
const u64 *data = (const u64 *)src;
|
||||
const u64 *end = data + Step;
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
while(data < end)
|
||||
{
|
||||
h = _mm_crc32_u64(h, data[0]);
|
||||
data += Step;
|
||||
}
|
||||
|
||||
const u8 *data2 = (const u8*)end;
|
||||
return _mm_crc32_u64(h, u64(data2[0]));
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* NOTE: This hash function is used for custom texture loading/dumping, so
|
||||
* it should not be changed, which would require all custom textures to be
|
||||
* recalculated for their new hash values. If the hashing function is
|
||||
* changed, make sure this one is still used when the legacy parameter is
|
||||
* true.
|
||||
*/
|
||||
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
const u64 m = 0xc6a4a7935bd1e995;
|
||||
u64 h = len * m;
|
||||
const int r = 47;
|
||||
u32 Step = (len / 8);
|
||||
const u64 *data = (const u64 *)src;
|
||||
const u64 *end = data + Step;
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
while(data < end)
|
||||
{
|
||||
u64 k = data[0];
|
||||
data+=Step;
|
||||
k *= m;
|
||||
k ^= k >> r;
|
||||
k *= m;
|
||||
h ^= k;
|
||||
h *= m;
|
||||
}
|
||||
|
||||
const u8 * data2 = (const u8*)end;
|
||||
|
||||
switch(len & 7)
|
||||
{
|
||||
case 7: h ^= u64(data2[6]) << 48;
|
||||
case 6: h ^= u64(data2[5]) << 40;
|
||||
case 5: h ^= u64(data2[4]) << 32;
|
||||
case 4: h ^= u64(data2[3]) << 24;
|
||||
case 3: h ^= u64(data2[2]) << 16;
|
||||
case 2: h ^= u64(data2[1]) << 8;
|
||||
case 1: h ^= u64(data2[0]);
|
||||
h *= m;
|
||||
};
|
||||
|
||||
h ^= h >> r;
|
||||
h *= m;
|
||||
h ^= h >> r;
|
||||
|
||||
return h;
|
||||
}
|
||||
#else
|
||||
// CRC32 hash using the SSE4.2 instruction
|
||||
u64 GetCRC32(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
#if _M_SSE >= 0x402
|
||||
u32 h = len;
|
||||
u32 Step = (len/4);
|
||||
const u32 *data = (const u32 *)src;
|
||||
const u32 *end = data + Step;
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
while(data < end)
|
||||
{
|
||||
h = _mm_crc32_u32(h, data[0]);
|
||||
data += Step;
|
||||
}
|
||||
|
||||
const u8 *data2 = (const u8*)end;
|
||||
return (u64)_mm_crc32_u32(h, u32(data2[0]));
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
//-----------------------------------------------------------------------------
|
||||
// Block read - if your platform needs to do endian-swapping or can only
|
||||
// handle aligned reads, do the conversion here
|
||||
|
||||
inline u32 getblock(const u32 * p, int i)
|
||||
{
|
||||
return p[i];
|
||||
}
|
||||
|
||||
//----------
|
||||
// Finalization mix - force all bits of a hash block to avalanche
|
||||
|
||||
// avalanches all bits to within 0.25% bias
|
||||
|
||||
inline u32 fmix32(u32 h)
|
||||
{
|
||||
h ^= h >> 16;
|
||||
h *= 0x85ebca6b;
|
||||
h ^= h >> 13;
|
||||
h *= 0xc2b2ae35;
|
||||
h ^= h >> 16;
|
||||
|
||||
return h;
|
||||
}
|
||||
|
||||
inline void bmix32(u32 & h1, u32 & h2, u32 & k1, u32 & k2, u32 & c1, u32 & c2)
|
||||
{
|
||||
k1 *= c1;
|
||||
k1 = _rotl(k1,11);
|
||||
k1 *= c2;
|
||||
h1 ^= k1;
|
||||
h1 += h2;
|
||||
|
||||
h2 = _rotl(h2,17);
|
||||
|
||||
k2 *= c2;
|
||||
k2 = _rotl(k2,11);
|
||||
k2 *= c1;
|
||||
h2 ^= k2;
|
||||
h2 += h1;
|
||||
|
||||
h1 = h1*3+0x52dce729;
|
||||
h2 = h2*3+0x38495ab5;
|
||||
|
||||
c1 = c1*5+0x7b7d159c;
|
||||
c2 = c2*5+0x6bce6396;
|
||||
}
|
||||
|
||||
//----------
|
||||
|
||||
u64 GetMurmurHash3(const u8* src, int len, u32 samples)
|
||||
{
|
||||
const u8 * data = (const u8*)src;
|
||||
u32 out[2];
|
||||
const int nblocks = len / 8;
|
||||
u32 Step = (len / 4);
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
|
||||
u32 h1 = 0x8de1c3ac;
|
||||
u32 h2 = 0xbab98226;
|
||||
|
||||
u32 c1 = 0x95543787;
|
||||
u32 c2 = 0x2ad7eb25;
|
||||
|
||||
//----------
|
||||
// body
|
||||
|
||||
const u32 * blocks = (const u32 *)(data + nblocks*8);
|
||||
|
||||
for(int i = -nblocks; i < 0; i+=Step)
|
||||
{
|
||||
u32 k1 = getblock(blocks,i*2+0);
|
||||
u32 k2 = getblock(blocks,i*2+1);
|
||||
|
||||
bmix32(h1,h2,k1,k2,c1,c2);
|
||||
}
|
||||
|
||||
//----------
|
||||
// tail
|
||||
|
||||
const u8 * tail = (const u8*)(data + nblocks*8);
|
||||
|
||||
u32 k1 = 0;
|
||||
u32 k2 = 0;
|
||||
|
||||
switch(len & 7)
|
||||
{
|
||||
case 7: k2 ^= tail[6] << 16;
|
||||
case 6: k2 ^= tail[5] << 8;
|
||||
case 5: k2 ^= tail[4] << 0;
|
||||
case 4: k1 ^= tail[3] << 24;
|
||||
case 3: k1 ^= tail[2] << 16;
|
||||
case 2: k1 ^= tail[1] << 8;
|
||||
case 1: k1 ^= tail[0] << 0;
|
||||
bmix32(h1,h2,k1,k2,c1,c2);
|
||||
};
|
||||
|
||||
//----------
|
||||
// finalization
|
||||
|
||||
h2 ^= len;
|
||||
|
||||
h1 += h2;
|
||||
h2 += h1;
|
||||
|
||||
h1 = fmix32(h1);
|
||||
h2 = fmix32(h2);
|
||||
|
||||
h1 += h2;
|
||||
h2 += h1;
|
||||
|
||||
out[0] = h1;
|
||||
out[1] = h2;
|
||||
|
||||
return *((u64 *)&out);
|
||||
}
|
||||
|
||||
/*
|
||||
* FIXME: The old 32-bit version of this hash made different hashes than the
|
||||
* 64-bit version. Until someone can make a new version of the 32-bit one that
|
||||
* makes identical hashes, this is just a c/p of the 64-bit one.
|
||||
*/
|
||||
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
const u64 m = 0xc6a4a7935bd1e995ULL;
|
||||
u64 h = len * m;
|
||||
const int r = 47;
|
||||
u32 Step = (len / 8);
|
||||
const u64 *data = (const u64 *)src;
|
||||
const u64 *end = data + Step;
|
||||
if(samples == 0) samples = std::max(Step, 1u);
|
||||
Step = Step / samples;
|
||||
if(Step < 1) Step = 1;
|
||||
while(data < end)
|
||||
{
|
||||
u64 k = data[0];
|
||||
data+=Step;
|
||||
k *= m;
|
||||
k ^= k >> r;
|
||||
k *= m;
|
||||
h ^= k;
|
||||
h *= m;
|
||||
}
|
||||
|
||||
const u8 * data2 = (const u8*)end;
|
||||
|
||||
switch(len & 7)
|
||||
{
|
||||
case 7: h ^= u64(data2[6]) << 48;
|
||||
case 6: h ^= u64(data2[5]) << 40;
|
||||
case 5: h ^= u64(data2[4]) << 32;
|
||||
case 4: h ^= u64(data2[3]) << 24;
|
||||
case 3: h ^= u64(data2[2]) << 16;
|
||||
case 2: h ^= u64(data2[1]) << 8;
|
||||
case 1: h ^= u64(data2[0]);
|
||||
h *= m;
|
||||
};
|
||||
|
||||
h ^= h >> r;
|
||||
h *= m;
|
||||
h ^= h >> r;
|
||||
|
||||
return h;
|
||||
}
|
||||
#endif
|
||||
|
||||
u64 GetHash64(const u8 *src, int len, u32 samples)
|
||||
{
|
||||
return ptrHashFunction(src, len, samples);
|
||||
}
|
||||
|
||||
// sets the hash function used for the texture cache
|
||||
void SetHash64Function(bool useHiresTextures)
|
||||
{
|
||||
if (useHiresTextures)
|
||||
{
|
||||
ptrHashFunction = &GetHashHiresTexture;
|
||||
}
|
||||
#if _M_SSE >= 0x402
|
||||
else if (cpu_info.bSSE4_2 && !useHiresTextures) // sse crc32 version
|
||||
{
|
||||
ptrHashFunction = &GetCRC32;
|
||||
}
|
||||
#endif
|
||||
else
|
||||
{
|
||||
ptrHashFunction = &GetMurmurHash3;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
@ -1,17 +0,0 @@
|
||||
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
|
||||
u32 HashFletcher(const u8* data_u8, size_t length); // FAST. Length & 1 == 0.
|
||||
u32 HashAdler32(const u8* data, size_t len); // Fairly accurate, slightly slower
|
||||
u32 HashFNV(const u8* ptr, int length); // Another fast and decent hash
|
||||
u32 HashEctor(const u8* ptr, int length); // JUNK. DO NOT USE FOR NEW THINGS
|
||||
u64 GetCRC32(const u8 *src, int len, u32 samples); // SSE4.2 version of CRC32
|
||||
u64 GetHashHiresTexture(const u8 *src, int len, u32 samples);
|
||||
u64 GetMurmurHash3(const u8 *src, int len, u32 samples);
|
||||
u64 GetHash64(const u8 *src, int len, u32 samples);
|
||||
void SetHash64Function(bool useHiresTextures);
|
||||
Loading…
Reference in New Issue
Block a user