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main.cpp
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main.cpp
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#include <assert.h>
#include <chrono>
#include <cstdint>
#include <iomanip>
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <vector>
using namespace std;
constexpr int64_t k64 = 1024*64;
uint16_t replacement[k64];
string convertDurationToString(chrono::duration<double, nano> nanoSeconds) {
uint64_t timeDuration = nanoSeconds.count();
if (timeDuration > 100000 && timeDuration < 100000*1000UL) {
return to_string(chrono::duration_cast<chrono::microseconds>(nanoSeconds).count()) + " microSeconds";
}
if (timeDuration > 100000*1000UL && timeDuration < uint64_t(100000*1000*1000UL)) {
return to_string(chrono::duration_cast<chrono::milliseconds>(nanoSeconds).count()) + " milliSeconds";
}
if (timeDuration > uint64_t(100000UL*1000*1000) && timeDuration < uint64_t(100000UL*1000*1000*60)) {
return to_string(chrono::duration_cast<chrono::seconds>(nanoSeconds).count()) + " seconds";
}
if (timeDuration > uint64_t(100000UL*1000*1000*60)) {
return to_string(chrono::duration_cast<chrono::minutes>(nanoSeconds).count()) + " minutes";
}
return to_string(chrono::duration_cast<chrono::nanoseconds>(nanoSeconds).count()) + " nanoSeconds";
}
class Timer {
chrono::high_resolution_clock::time_point startTime;
chrono::high_resolution_clock::time_point endTime;
chrono::duration<double, nano> duration;
chrono::duration<double, nano>& encryptionDuration;
const string desc;
public:
Timer(const string& desc, chrono::duration<double, nano>& encryptionDuration) : desc(desc), encryptionDuration(encryptionDuration) {
startTime = chrono::high_resolution_clock::now();
}
~Timer() {
endTime = chrono::high_resolution_clock::now();
duration = chrono::duration_cast<chrono::duration<double, nano>>(endTime - startTime);
encryptionDuration += duration;
cout << desc << convertDurationToString(duration) << endl;
}
};
int main() {
int j = 0;
for (int i = k64-1; i >= 0; --i) {
replacement[i] = j;
++j;
}
uint64_t base[k64];
for (int i = 0; i < k64; ++i) {
base[i] = 0x4142434445464748+i;
}
chrono::duration<double, nano> duration;
{
Timer timer1("Time to substitute 64 shorts of a 128 byte portion without shifting: ", duration);
for (int k = 0; k < k64; k += 2) {
uint64_t* bptr = &base[k];
uint16_t* sa1 = reinterpret_cast<uint16_t *>(bptr);
uint16_t* sa2 = reinterpret_cast<uint16_t *>(bptr)+1;
uint16_t* sa3 = reinterpret_cast<uint16_t *>(bptr)+2;
uint16_t* sa4 = reinterpret_cast<uint16_t *>(bptr)+3;
uint16_t va1 = replacement[*sa1];
uint16_t va2 = replacement[*sa2];
uint16_t va3 = replacement[*sa3];
uint16_t va4 = replacement[*sa4];
va2 ^= va1;
va3 ^= va2;
va4 ^= va3;
uint64_t* bptr1 = &base[k+1];
uint16_t* sb1 = reinterpret_cast<uint16_t *>(bptr1);
uint16_t* sb2 = reinterpret_cast<uint16_t *>(bptr1)+1;
uint16_t* sb3 = reinterpret_cast<uint16_t *>(bptr1)+2;
uint16_t* sb4 = reinterpret_cast<uint16_t *>(bptr1)+3;
uint16_t vb1 = replacement[*sb1];
uint16_t vb2 = replacement[*sb2];
uint16_t vb3 = replacement[*sb3];
uint16_t vb4 = replacement[*sb4];
vb1 ^= va4;
vb2 ^= vb1;
vb3 ^= vb2;
vb4 ^= vb3;
va1 ^= vb4;
*sa1 = va1;
*sa2 = va2;
*sa3 = va3;
*sa4 = va4;
*sb1 = vb1;
*sb2 = vb2;
*sb3 = vb3;
*sb4 = vb4;
}
}
{
Timer timer1("Time to substitute 8 shorts of a uint64 without shifting: ", duration);
for (int k = 0; k < k64; ++k) {
uint64_t* bptr = &base[k];
uint16_t* s1 = reinterpret_cast<uint16_t *>(bptr);
uint16_t* s2 = reinterpret_cast<uint16_t *>(bptr)+1;
uint16_t* s3 = reinterpret_cast<uint16_t *>(bptr)+2;
uint16_t* s4 = reinterpret_cast<uint16_t *>(bptr)+3;
uint16_t v1 = replacement[*s1];
uint16_t v2 = replacement[*s2];
uint16_t v3 = replacement[*s3];
uint16_t v4 = replacement[*s4];
v2 ^= v1;
v3 ^= v2;
v4 ^= v3;
v1 ^= v4;
*s1 = v1;
*s2 = v2;
*s3 = v3;
*s4 = v4;
}
}
{
Timer timer1("Time to substitute 8 shorts of a uint64: ", duration);
for (int k = 0; k < k64; ++k) {
uint64_t* bptr = &base[k];
uint16_t* s1 = reinterpret_cast<uint16_t *>(bptr);
uint16_t* s2 = reinterpret_cast<uint16_t *>(bptr)+1;
uint16_t* s3 = reinterpret_cast<uint16_t *>(bptr)+2;
uint16_t* s4 = reinterpret_cast<uint16_t *>(bptr)+3;
uint16_t v1 = replacement[*s1];
uint16_t v2 = replacement[*s2];
uint16_t v3 = replacement[*s3];
uint16_t v4 = replacement[*s4];
v2 ^= v1;
v3 ^= v2;
v4 ^= v3;
uint8_t lastByte = v4 & 0x00FF;
v1 ^= (lastByte << 8);
*s1 = v1;
*s2 = v2;
*s3 = v3;
*s4 = v4;
}
}
{
Timer timer1("Time to substitute 8 shorts of a uint64 but as one uint64: ", duration);
for (int k = 0; k < k64; ++k) {
uint64_t* bptr = &base[k];
uint16_t* s1 = reinterpret_cast<uint16_t *>(bptr);
uint16_t* s2 = reinterpret_cast<uint16_t *>(bptr)+1;
uint16_t* s3 = reinterpret_cast<uint16_t *>(bptr)+2;
uint16_t* s4 = reinterpret_cast<uint16_t *>(bptr)+3;
uint64_t v1 = replacement[*s1];
uint64_t v2 = replacement[*s2];
uint64_t v3 = replacement[*s3];
uint64_t v4 = replacement[*s4];
v2 ^= v1;
v3 ^= v2;
v4 ^= v3;
uint8_t lastByte = v4 & 0x00FF;
v1 ^= (lastByte << 8);
uint64_t val = v1 | (v2 << 16) | (v3 << 32) | (v4 << 48);
*bptr = val;
}
}
{
Timer timer1("Time to substitute 8 shorts of 8 bytes as a wave: ", duration);
for (int l = 0; l < k64; l = l+8) {
uint64_t* bptr1 = &base[l];
uint64_t* bptr2 = &base[1+l];
uint64_t* bptr3 = &base[2+l];
uint64_t* bptr4 = &base[3+l];
uint64_t* bptr5 = &base[4+l];
uint64_t* bptr6 = &base[5+l];
uint64_t* bptr7 = &base[6+l];
uint64_t* bptr8 = &base[7+l];
uint16_t* s1a = reinterpret_cast<uint16_t *>(bptr1);
uint16_t* s1b = reinterpret_cast<uint16_t *>(bptr2);
uint16_t* s1c = reinterpret_cast<uint16_t *>(bptr3);
uint16_t* s1d = reinterpret_cast<uint16_t *>(bptr4);
uint16_t* s1e = reinterpret_cast<uint16_t *>(bptr5);
uint16_t* s1f = reinterpret_cast<uint16_t *>(bptr6);
uint16_t* s1g = reinterpret_cast<uint16_t *>(bptr7);
uint16_t* s1h = reinterpret_cast<uint16_t *>(bptr8);
uint16_t v1a = replacement[*s1a];
uint16_t v1b = replacement[*s1b];
uint16_t v1c = replacement[*s1c];
uint16_t v1d = replacement[*s1d];
uint16_t v1e = replacement[*s1e];
uint16_t v1f = replacement[*s1f];
uint16_t v1g = replacement[*s1g];
uint16_t v1h = replacement[*s1h];
uint16_t* s2a = reinterpret_cast<uint16_t *>(bptr1)+1;
uint16_t* s2b = reinterpret_cast<uint16_t *>(bptr2)+1;
uint16_t* s2c = reinterpret_cast<uint16_t *>(bptr3)+1;
uint16_t* s2d = reinterpret_cast<uint16_t *>(bptr4)+1;
uint16_t* s2e = reinterpret_cast<uint16_t *>(bptr5)+1;
uint16_t* s2f = reinterpret_cast<uint16_t *>(bptr6)+1;
uint16_t* s2g = reinterpret_cast<uint16_t *>(bptr7)+1;
uint16_t* s2h = reinterpret_cast<uint16_t *>(bptr8)+1;
uint16_t v2a = replacement[*s2a];
uint16_t v2b = replacement[*s2b];
uint16_t v2c = replacement[*s2c];
uint16_t v2d = replacement[*s2d];
uint16_t v2e = replacement[*s2e];
uint16_t v2f = replacement[*s2f];
uint16_t v2g = replacement[*s2g];
uint16_t v2h = replacement[*s2h];
uint16_t* s3a = reinterpret_cast<uint16_t *>(bptr1)+2;
uint16_t* s3b = reinterpret_cast<uint16_t *>(bptr2)+2;
uint16_t* s3c = reinterpret_cast<uint16_t *>(bptr3)+2;
uint16_t* s3d = reinterpret_cast<uint16_t *>(bptr4)+2;
uint16_t* s3e = reinterpret_cast<uint16_t *>(bptr5)+2;
uint16_t* s3f = reinterpret_cast<uint16_t *>(bptr6)+2;
uint16_t* s3g = reinterpret_cast<uint16_t *>(bptr7)+2;
uint16_t* s3h = reinterpret_cast<uint16_t *>(bptr8)+2;
uint16_t v3a = replacement[*s3a];
uint16_t v3b = replacement[*s3b];
uint16_t v3c = replacement[*s3c];
uint16_t v3d = replacement[*s3d];
uint16_t v3e = replacement[*s3e];
uint16_t v3f = replacement[*s3f];
uint16_t v3g = replacement[*s3g];
uint16_t v3h = replacement[*s3h];
uint16_t* s4a = reinterpret_cast<uint16_t *>(bptr1)+3;
uint16_t* s4b = reinterpret_cast<uint16_t *>(bptr2)+3;
uint16_t* s4c = reinterpret_cast<uint16_t *>(bptr3)+3;
uint16_t* s4d = reinterpret_cast<uint16_t *>(bptr4)+3;
uint16_t* s4e = reinterpret_cast<uint16_t *>(bptr5)+3;
uint16_t* s4f = reinterpret_cast<uint16_t *>(bptr6)+3;
uint16_t* s4g = reinterpret_cast<uint16_t *>(bptr7)+3;
uint16_t* s4h = reinterpret_cast<uint16_t *>(bptr8)+3;
uint16_t v4a = replacement[*s4a];
uint16_t v4b = replacement[*s4b];
uint16_t v4c = replacement[*s4c];
uint16_t v4d = replacement[*s4d];
uint16_t v4e = replacement[*s4e];
uint16_t v4f = replacement[*s4f];
uint16_t v4g = replacement[*s4g];
uint16_t v4h = replacement[*s4h];
uint8_t lastByte1 = v4a & 0xFF;
uint8_t lastByte2 = v4b & 0xFF;
uint8_t lastByte3 = v4c & 0xFF;
uint8_t lastByte4 = v4d & 0xFF;
uint8_t lastByte5 = v4e & 0xFF;
uint8_t lastByte6 = v4f & 0xFF;
uint8_t lastByte7 = v4g & 0xFF;
uint8_t lastByte8 = v4h & 0xFF;
v2a ^= v1a;
v2b ^= v1b;
v2c ^= v1c;
v2d ^= v1d;
v2e ^= v1e;
v2f ^= v1f;
v2g ^= v1g;
v2h ^= v1h;
v3a ^= v2a;
v3b ^= v2b;
v3c ^= v2c;
v3d ^= v2d;
v3e ^= v2e;
v3f ^= v2f;
v3g ^= v2g;
v3h ^= v2h;
v4a ^= v3a;
v4b ^= v3b;
v4c ^= v3c;
v4d ^= v3d;
v4e ^= v3e;
v4f ^= v3f;
v4g ^= v3g;
v4h ^= v3h;
v1a ^= (lastByte1 << 8);
v1b ^= (lastByte2 << 8);
v1c ^= (lastByte3 << 8);
v1d ^= (lastByte4 << 8);
v1e ^= (lastByte5 << 8);
v1f ^= (lastByte6 << 8);
v1g ^= (lastByte7 << 8);
v1h ^= (lastByte8 << 8);
*s1a = v1a;
*s1b = v1b;
*s1c = v1c;
*s1d = v1d;
*s1e = v1e;
*s1f = v1f;
*s1g = v1g;
*s1h = v1h;
*s2a = v2a;
*s2b = v2b;
*s2c = v2c;
*s2d = v2d;
*s2e = v2e;
*s2f = v2f;
*s2g = v2g;
*s2h = v2h;
*s3a = v3a;
*s3b = v3b;
*s3c = v3c;
*s3d = v3d;
*s3e = v3e;
*s3f = v3f;
*s3g = v3g;
*s3h = v3h;
*s4a = v4a;
*s4b = v4b;
*s4c = v4c;
*s4d = v4d;
*s4e = v4e;
*s4f = v4f;
*s4g = v4g;
*s4h = v4h;
}
}
{
Timer timer1("Time to substitute 8 shorts of 8 bytes as a wave but storing uint64 together: ", duration);
for (int l = 0; l < k64; l = l+8) {
uint64_t* bptr1 = &base[l];
uint64_t* bptr2 = &base[1+l];
uint64_t* bptr3 = &base[2+l];
uint64_t* bptr4 = &base[3+l];
uint64_t* bptr5 = &base[4+l];
uint64_t* bptr6 = &base[5+l];
uint64_t* bptr7 = &base[6+l];
uint64_t* bptr8 = &base[7+l];
uint16_t* s1a = reinterpret_cast<uint16_t *>(bptr1);
uint16_t* s1b = reinterpret_cast<uint16_t *>(bptr2);
uint16_t* s1c = reinterpret_cast<uint16_t *>(bptr3);
uint16_t* s1d = reinterpret_cast<uint16_t *>(bptr4);
uint16_t* s1e = reinterpret_cast<uint16_t *>(bptr5);
uint16_t* s1f = reinterpret_cast<uint16_t *>(bptr6);
uint16_t* s1g = reinterpret_cast<uint16_t *>(bptr7);
uint16_t* s1h = reinterpret_cast<uint16_t *>(bptr8);
uint16_t v1a = replacement[*s1a];
uint16_t v1b = replacement[*s1b];
uint16_t v1c = replacement[*s1c];
uint16_t v1d = replacement[*s1d];
uint16_t v1e = replacement[*s1e];
uint16_t v1f = replacement[*s1f];
uint16_t v1g = replacement[*s1g];
uint16_t v1h = replacement[*s1h];
uint16_t* s2a = reinterpret_cast<uint16_t *>(bptr1)+1;
uint16_t* s2b = reinterpret_cast<uint16_t *>(bptr2)+1;
uint16_t* s2c = reinterpret_cast<uint16_t *>(bptr3)+1;
uint16_t* s2d = reinterpret_cast<uint16_t *>(bptr4)+1;
uint16_t* s2e = reinterpret_cast<uint16_t *>(bptr5)+1;
uint16_t* s2f = reinterpret_cast<uint16_t *>(bptr6)+1;
uint16_t* s2g = reinterpret_cast<uint16_t *>(bptr7)+1;
uint16_t* s2h = reinterpret_cast<uint16_t *>(bptr8)+1;
uint16_t v2a = replacement[*s2a];
uint16_t v2b = replacement[*s2b];
uint16_t v2c = replacement[*s2c];
uint16_t v2d = replacement[*s2d];
uint16_t v2e = replacement[*s2e];
uint16_t v2f = replacement[*s2f];
uint16_t v2g = replacement[*s2g];
uint16_t v2h = replacement[*s2h];
uint16_t* s3a = reinterpret_cast<uint16_t *>(bptr1)+2;
uint16_t* s3b = reinterpret_cast<uint16_t *>(bptr2)+2;
uint16_t* s3c = reinterpret_cast<uint16_t *>(bptr3)+2;
uint16_t* s3d = reinterpret_cast<uint16_t *>(bptr4)+2;
uint16_t* s3e = reinterpret_cast<uint16_t *>(bptr5)+2;
uint16_t* s3f = reinterpret_cast<uint16_t *>(bptr6)+2;
uint16_t* s3g = reinterpret_cast<uint16_t *>(bptr7)+2;
uint16_t* s3h = reinterpret_cast<uint16_t *>(bptr8)+2;
uint16_t v3a = replacement[*s3a];
uint16_t v3b = replacement[*s3b];
uint16_t v3c = replacement[*s3c];
uint16_t v3d = replacement[*s3d];
uint16_t v3e = replacement[*s3e];
uint16_t v3f = replacement[*s3f];
uint16_t v3g = replacement[*s3g];
uint16_t v3h = replacement[*s3h];
uint16_t* s4a = reinterpret_cast<uint16_t *>(bptr1)+3;
uint16_t* s4b = reinterpret_cast<uint16_t *>(bptr2)+3;
uint16_t* s4c = reinterpret_cast<uint16_t *>(bptr3)+3;
uint16_t* s4d = reinterpret_cast<uint16_t *>(bptr4)+3;
uint16_t* s4e = reinterpret_cast<uint16_t *>(bptr5)+3;
uint16_t* s4f = reinterpret_cast<uint16_t *>(bptr6)+3;
uint16_t* s4g = reinterpret_cast<uint16_t *>(bptr7)+3;
uint16_t* s4h = reinterpret_cast<uint16_t *>(bptr8)+3;
uint16_t v4a = replacement[*s4a];
uint16_t v4b = replacement[*s4b];
uint16_t v4c = replacement[*s4c];
uint16_t v4d = replacement[*s4d];
uint16_t v4e = replacement[*s4e];
uint16_t v4f = replacement[*s4f];
uint16_t v4g = replacement[*s4g];
uint16_t v4h = replacement[*s4h];
uint8_t lastByte1 = v4a & 0xFF;
uint8_t lastByte2 = v4b & 0xFF;
uint8_t lastByte3 = v4c & 0xFF;
uint8_t lastByte4 = v4d & 0xFF;
uint8_t lastByte5 = v4e & 0xFF;
uint8_t lastByte6 = v4f & 0xFF;
uint8_t lastByte7 = v4g & 0xFF;
uint8_t lastByte8 = v4h & 0xFF;
v1a ^= (lastByte1 << 8);
v1b ^= (lastByte2 << 8);
v1c ^= (lastByte3 << 8);
v1d ^= (lastByte4 << 8);
v1e ^= (lastByte5 << 8);
v1f ^= (lastByte6 << 8);
v1g ^= (lastByte7 << 8);
v1h ^= (lastByte8 << 8);
v2a ^= v1a;
v2b ^= v1b;
v2c ^= v1c;
v2d ^= v1d;
v2e ^= v1e;
v2f ^= v1f;
v2g ^= v1g;
v2h ^= v1h;
v3a ^= v2a;
v3b ^= v2b;
v3c ^= v2c;
v3d ^= v2d;
v3e ^= v2e;
v3f ^= v2f;
v3g ^= v2g;
v3h ^= v2h;
v4a ^= v3a;
v4b ^= v3b;
v4c ^= v3c;
v4d ^= v3d;
v4e ^= v3e;
v4f ^= v3f;
v4g ^= v3g;
v4h ^= v3h;
*s1a = v1a;
*s2a = v2a;
*s3a = v3a;
*s4a = v4a;
*s1b = v1b;
*s2b = v2b;
*s3b = v3b;
*s4b = v4b;
*s1c = v1c;
*s2c = v2c;
*s3c = v3c;
*s4c = v4c;
*s1d = v1d;
*s2d = v2d;
*s3d = v3d;
*s4d = v4d;
*s1e = v1e;
*s2e = v2e;
*s3e = v3e;
*s4e = v4e;
*s1f = v1f;
*s2f = v2f;
*s3f = v3f;
*s4f = v4f;
*s1g = v1g;
*s2g = v2g;
*s3g = v3g;
*s4g = v4g;
*s1h = v1h;
*s2h = v2h;
*s3h = v3h;
*s4h = v4h;
}
}
return 0;
}