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  1. #include <stdio.h>
  2. #include <stdint.h>
  3. #include <stdbool.h>
  4.  
  5.  
  6. union foo
  7. {
  8.     int32_t i;
  9.     float f;
  10. };
  11.  
  12.  
  13. void compare (const union foo * lo,
  14.               const union foo * hi)
  15. {
  16. 	bool success = (lo->f) < (hi->f);
  17. 	if (!success)
  18. 		printf ("lo:%x:%f hi:%x:%f\n", lo->i, lo->f, hi->i, hi->f);
  19. }
  20.  
  21.  
  22. bool is_special_case (int32_t value)
  23. {
  24. 	static const int32_t special = (int32_t)0xFF << 23;
  25. 	return (value & special) == special;
  26. }
  27.  
  28.  
  29. int main(void)
  30. {
  31.  
  32. 	for (int32_t i = 0; i < INT32_MAX - 1; ++i)
  33. 	{
  34. 		bool special = is_special_case (i);
  35. 		if (special)
  36. 			continue;
  37.  
  38. 		union foo lo = {.i = i};
  39. 		union foo hi = {.i = i + 1};
  40.  
  41. 		compare (&lo, &hi);
  42. 	}
  43.  
  44. }
  45.  
Success #stdin #stdout 1.92s 9296KB
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https://ideone.com/s1i4rE
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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