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  1. var a = [0,0xffffffff];
  2. var b = [0,0xffffffff];
  3. var c = [0xffffffff,0xffffffff];
  4. var d = [0,1];
  5.  
  6. var lim = 0x100000000;
  7. var addIU = function(a,b) {
  8.     var hi = a[0] + b[0];
  9.     var lo = a[1] + b[1];
  10.     if (lo >= lim) {
  11.         lo -= lim;
  12.         hi++;
  13.     }
  14.     if (hi >= lim) {
  15.         hi -= lim;
  16.     }
  17.     return [hi, lo];
  18. };
  19.  
  20. var subIU = function(a,b) {
  21.     var hi = a[0] - b[0];
  22.     var lo = a[1] - b[1];
  23.     if (lo < 0) {
  24.         lo += lim;
  25.         hi--;
  26.     }
  27.     if (hi < 0) {
  28.         hi += lim;
  29.     }
  30.     return [hi, lo];
  31. };
  32.  
  33. var sub = subIU(c,b);
  34. console.log(sub);
Runtime error #stdin #stdout 0.29s 213184KB
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Standard input is empty
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Standard output is empty
https://ideone.com/WdEbh
language:
JavaScript (rhino 1.7.9)
created:
14 years ago
visibility:
public

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