C file for stoke

stoketest.c

#include <stdint.h>
#include <endian.h>
#include <stdlib.h>

unsigned __int128 ntohlll(unsigned __int128 n) {
  struct pieces {
    uint64_t a;
    uint64_t b;
  } *p = (struct pieces*)&n;
  return ((unsigned __int128)(be64toh(p->b))) << 64 | be64toh(p->a);
}

unsigned __int128 htonlll(unsigned __int128 n) {
  return ntohlll(n);
}

void __attribute__((noinline)) dbl(unsigned __int128 *ptr) {
  unsigned __int128 n = ntohlll(*ptr);
  unsigned __int128 m = (n << 1) ^ (n & ((((unsigned __int128)1)<<127) ? 0x87 : 0x00));
  *ptr = htonlll(m);
}

//void __attribute__((noinline)) dbl(unsigned __int128 *ptr) {
//  unsigned __int128 n = ntohlll(*ptr);
//  unsigned __int128 m = (n << 1) ^ (n >> 127) * 0b10000111;
//  *ptr = htonlll(m);
//}

unsigned int reverseBits(unsigned int num)
{
    unsigned int count = sizeof(num) * 8 - 1;
    unsigned int reverse_num = num;
     
    num >>= 1; 
    while(num)
    {
       reverse_num <<= 1;       
       reverse_num |= num & 1;
       num >>= 1;
       count--;
    }
    reverse_num <<= count;
    return reverse_num;
}

int main(int argc, char** argv) {
  int itr = atoi(argv[1]);
  unsigned __int128 n;
  for (int i = 0 ; i < itr; i++) {
    uint32_t j = reverseBits(i);
    n = ((unsigned __int128)j) << (32*3) | ((unsigned __int128)j) << (32*2) | ((unsigned __int128)j) << (32*1) | ((unsigned __int128)j);
    dbl(&n);
  }
  return (uint8_t)n;