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#include "bid_trans.h"

BID_F80_CONST_DEF( c_385,     4007810000000000, 0000000000000000); // 385.
BID_F80_CONST_DEF( c_neg_398, c0078e0000000000, 0000000000000000); // -398
BID_F80_CONST_DEF( c_1e2000,  59f2cf6c9c9bc5f8, 84a294e53edc955f); // 1e2000
BID_F80_CONST_DEF( c_1em2000, 260b1ad56d712a5d, 7f02384e5ded39be); // 1e-2000

BID_TYPE0_FUNCTION_ARGTYPE1(BID_UINT64, bid64_exp10, BID_UINT64, x)

  BID_UINT64 sign_x, coefficient_x;
  BID_UINT64 valid_x, res;
  BID_F80_TYPE xd, zd;
  int exponent_x;

  valid_x = unpack_BID64 (&sign_x, &exponent_x, &coefficient_x, x);

  if (!valid_x) {
    // test if x is NaN
if ((x & 0x7c00000000000000ull) == 0x7c00000000000000ull) {
#ifdef BID_SET_STATUS_FLAGS
  if ((x & 0x7e00000000000000ull) == 0x7e00000000000000ull)	// sNaN
    __set_status_flags (pfpsf, BID_INVALID_EXCEPTION);
#endif
	res = (coefficient_x) & QUIET_MASK64;
	BID_RETURN (res);
}
    // x is Infinity?
if ((x & 0x7800000000000000ull) == 0x7800000000000000ull) {
	res = sign_x ? 0ull : 0x7800000000000000ull;
    BID_RETURN (res);
  }
    // x is 0
	 res = 0x31c0000000000001ull;
     BID_RETURN (res);
}

  BIDECIMAL_CALL1(bid64_to_binary80,xd,x);
  if (__bid_f80_ge( xd, c_385.v)) { BID_F80_ASSIGN( zd, c_1e2000 ); }
  else if (__bid_f80_lt( xd, c_neg_398.v)) { BID_F80_ASSIGN( zd, c_1em2000 ); }
  else __bid_f80_exp10( zd, xd );

  BIDECIMAL_CALL1(binary80_to_bid64,res,zd);
  BID_RETURN (res);

}

