nissy-core

The "engine" of nissy, including the H48 optimal solver.
git clone https://git.tronto.net/nissy-core
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popcount_u32_tests.c (768B)

      1 #include "../test.h"
      2 
      3 int popcount_u32(uint32_t x);
      4 
      5 int
      6 popcount_u32_simple(uint32_t x)
      7 {
      8 	int ret;
      9 
     10 	for (ret = 0; x != 0; x >>= 1)
     11 		ret += x & 1;
     12 
     13 	return ret;
     14 }
     15 
     16 bool
     17 correct(uint32_t x)
     18 {
     19 	int expected = popcount_u32_simple(x);
     20 	int actual = popcount_u32(x);
     21 	if (actual != expected) {
     22 		printf("Error at %" PRIu32 ": expected %d bits, found %d\n",
     23 		    x, expected, actual);
     24 		return false;
     25 	}
     26 	return true;
     27 }
     28 
     29 void run(void) {
     30 	uint32_t i;
     31 
     32 	/* Test all numbers up to 2^16, and other ranges of 2^16 numbers */
     33 	for (i = 0; i < 0xFFFF; i++) {
     34 		if (!correct(i) ||
     35 		    !correct(i + UINT32_C(0xFFFF0000)) ||
     36 		    !correct(i + UINT32_C(1000000)) ||
     37 		    !correct(i + UINT32_C(1)) ||
     38 		    !correct(i + UINT32_C(1234567)))
     39 		    return;
     40 	}
     41 
     42 	printf("Ok\n");
     43 }