示例#1
0
 public float FromFloatParts(FloatDescription desc, FloatParts parts)
 {
     var isZero = true;
     var sign = parts.Sign > 0 ? -1 : 1;
     var e = BitsToInt(parts.Exponent) - desc.ExponentBias;
     if (e != 0) {
         isZero = false;
     }
     var exp = Math.Pow(2.0, e);
     double frac = 0;
     frac += 1;
     for (var i = 0; i < desc.SignificandBits; i++) {
         if (parts.Fraction[i] == Bit.One) {
             frac += Math.Pow(2.0, -(i + 1));
             isZero = false;
         }
     }
     if (isZero) {
         return 0;
     }
     return (float)(sign * frac * exp);
 }
示例#2
0
 public FloatParts ToFloatParts(FloatDescription desc, Bit[] bits)
 {
     if (bits.Length != desc.BitCount) {
         throw new Exception("not enough bits");
     }
     var e = new List<Bit>();
     var f = new List<Bit>();
     if (desc.ExponentBits > 0) {
         e = bits.Skip(1).Take(desc.ExponentBits).ToList();
     }
     if (desc.SignificandBits > 0) {
         f = bits.Skip(1 + desc.ExponentBits).ToList();
     }
     var parts = new FloatParts {
         Sign = bits[0],
         Exponent = e.ToArray(),
         Fraction = f.ToArray()
     };
     return parts;
 }