Function decimal_from_bfloat16

cpp/fory/serialization/compatible_scalar.cc:667–683

}

bool decimal_from_bfloat16(bfloat16_t value, Decimal &out) {
  uint16_t bits = value.to_bits();
  const bool negative = (bits & 0x8000u) != 0;
  const uint16_t exp_bits = (bits >> 7) & 0xffu;
  uint16_t frac = bits & 0x007fu;
  if (exp_bits == 0 && frac == 0) {
    out = Decimal();
    return true;
  }
  uint64_t significand = frac;
  int32_t exponent = -133;
  if (exp_bits != 0) {
    significand |= uint64_t{1} << 7;
    exponent = static_cast<int32_t>(exp_bits) - 127 - 7;
  }
  return decimal_from_float_bits(negative, significand, exponent, out);
}

bool decimal_plain_string(const Decimal &decimal, std::string &out) {
  Decimal canonical;