/* Copyright (C) 2007  Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file.  (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING.  If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.  */

#define BID_128RES
#include "bid_div_macros.h"
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
#include <fenv.h>

#define FE_ALL_FLAGS FE_INVALID|FE_DIVBYZERO|FE_OVERFLOW|FE_UNDERFLOW|FE_INEXACT
#endif

extern UINT32 convert_table[5][128][2];
extern SINT8 factors[][2];
extern UINT8 packed_10000_zeros[];

BID128_FUNCTION_ARG2 (bid128_div, x, y)

     UINT256 CA4, CA4r, P256;
     UINT128 CX, CY, T128, CQ, CR, CA, TP128, Qh, Ql, res;
     UINT64 sign_x, sign_y, T, carry64, D, Q_high, Q_low, QX, PD,
       valid_y;
     int_float fx, fy, f64;
     UINT32 QX32, tdigit[3], digit, digit_h, digit_low;
     int exponent_x, exponent_y, bin_index, bin_expon, diff_expon, ed2,
       digits_q, amount;
     int nzeros, i, j, k, d5;
     unsigned rmode;
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
     fexcept_t binaryflags = 0;
#endif

valid_y = unpack_BID128_value (&sign_y, &exponent_y, &CY, y);

  // unpack arguments, check for NaN or Infinity
if (!unpack_BID128_value (&sign_x, &exponent_x, &CX, x)) {
    // test if x is NaN
if ((x.w[1] & 0x7c00000000000000ull) == 0x7c00000000000000ull) {
#ifdef SET_STATUS_FLAGS
  if ((x.w[1] & 0x7e00000000000000ull) == 0x7e00000000000000ull ||	// sNaN
      (y.w[1] & 0x7e00000000000000ull) == 0x7e00000000000000ull)
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[1] = (CX.w[1]) & QUIET_MASK64;
  res.w[0] = CX.w[0];
  BID_RETURN (res);
}
    // x is Infinity?
if ((x.w[1] & 0x7800000000000000ull) == 0x7800000000000000ull) {
  // check if y is Inf. 
  if (((y.w[1] & 0x7c00000000000000ull) == 0x7800000000000000ull))
    // return NaN 
  {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is NaN?
  if (((y.w[1] & 0x7c00000000000000ull) != 0x7c00000000000000ull))
    // return NaN 
  {
    // return +/-Inf
    res.w[1] = ((x.w[1] ^ y.w[1]) & 0x8000000000000000ull) |
      0x7800000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
}
    // x is 0
if ((y.w[1] & 0x7800000000000000ull) < 0x7800000000000000ull) {
  if ((!CY.w[0]) && !(CY.w[1] & 0x0001ffffffffffffull)) {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    // x=y=0, return NaN
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // return 0
  res.w[1] = (x.w[1] ^ y.w[1]) & 0x8000000000000000ull;
  exponent_x = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS_128;
  if (exponent_x > DECIMAL_MAX_EXPON_128)
    exponent_x = DECIMAL_MAX_EXPON_128;
  else if (exponent_x < 0)
    exponent_x = 0;
  res.w[1] |= (((UINT64) exponent_x) << 49);
  res.w[0] = 0;
  BID_RETURN (res);
}
}
if (!valid_y) {
  // y is Inf. or NaN

  // test if y is NaN
  if ((y.w[1] & 0x7c00000000000000ull) == 0x7c00000000000000ull) {
#ifdef SET_STATUS_FLAGS
    if ((y.w[1] & 0x7e00000000000000ull) == 0x7e00000000000000ull)	// sNaN
      __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    res.w[1] = CY.w[1] & QUIET_MASK64;
    res.w[0] = CY.w[0];
    BID_RETURN (res);
  }
  // y is Infinity?
  if ((y.w[1] & 0x7800000000000000ull) == 0x7800000000000000ull) {
    // return +/-0
    res.w[1] = sign_x ^ sign_y;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is 0, return +/-Inf
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, ZERO_DIVIDE_EXCEPTION);
#endif
  res.w[1] =
    ((x.w[1] ^ y.w[1]) & 0x8000000000000000ull) | 0x7800000000000000ull;
  res.w[0] = 0;
  BID_RETURN (res);
}
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fegetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
diff_expon = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS_128;

if (__unsigned_compare_gt_128 (CY, CX)) {
  // CX < CY

  // 2^64
  f64.i = 0x5f800000;

  // fx ~ CX,   fy ~ CY
  fx.d = (float) CX.w[1] * f64.d + (float) CX.w[0];
  fy.d = (float) CY.w[1] * f64.d + (float) CY.w[0];
  // expon_cy - expon_cx
  bin_index = (fy.i - fx.i) >> 23;

  if (CX.w[1]) {
    T = power10_index_binexp_128[bin_index].w[0];
    __mul_64x128_short (CA, T, CX);
  } else {
    T128 = power10_index_binexp_128[bin_index];
    __mul_64x128_short (CA, CX.w[0], T128);
  }

  ed2 = 33;
  if (__unsigned_compare_gt_128 (CY, CA))
    ed2++;

  T128 = power10_table_128[ed2];
  __mul_128x128_to_256 (CA4, CA, T128);

  ed2 += estimate_decimal_digits[bin_index];
  CQ.w[0] = CQ.w[1] = 0;
  diff_expon = diff_expon - ed2;

} else {
  // get CQ = CX/CY
  __div_128_by_128 (&CQ, &CR, CX, CY);

  if (!CR.w[1] && !CR.w[0]) {
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,
		pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
  // get number of decimal digits in CQ
  // 2^64
  f64.i = 0x5f800000;
  fx.d = (float) CQ.w[1] * f64.d + (float) CQ.w[0];
  // binary expon. of CQ
  bin_expon = (fx.i - 0x3f800000) >> 23;

  digits_q = estimate_decimal_digits[bin_expon];
  TP128.w[0] = power10_index_binexp_128[bin_expon].w[0];
  TP128.w[1] = power10_index_binexp_128[bin_expon].w[1];
  if (__unsigned_compare_ge_128 (CQ, TP128))
    digits_q++;

  ed2 = 34 - digits_q;
  T128.w[0] = power10_table_128[ed2].w[0];
  T128.w[1] = power10_table_128[ed2].w[1];
  __mul_128x128_to_256 (CA4, CR, T128);
  diff_expon = diff_expon - ed2;
  __mul_128x128_low (CQ, CQ, T128);

}

__div_256_by_128 (&CQ, &CA4, CY);

#ifdef SET_STATUS_FLAGS
if (CA4.w[0] || CA4.w[1]) {
  // set status flags
  __set_status_flags (pfpsf, INEXACT_EXCEPTION);
}
#ifndef LEAVE_TRAILING_ZEROS
else
#endif
#else
#ifndef LEAVE_TRAILING_ZEROS
if (!CA4.w[0] && !CA4.w[1])
#endif
#endif
#ifndef LEAVE_TRAILING_ZEROS
  // check whether result is exact
{
  // check whether CX, CY are short
  if (!CX.w[1] && !CY.w[1] && (CX.w[0] <= 1024) && (CY.w[0] <= 1024)) {
    i = (int) CY.w[0] - 1;
    j = (int) CX.w[0] - 1;
    // difference in powers of 2 factors for Y and X
    nzeros = ed2 - factors[i][0] + factors[j][0];
    // difference in powers of 5 factors
    d5 = ed2 - factors[i][1] + factors[j][1];
    if (d5 < nzeros)
      nzeros = d5;
    // get P*(2^M[extra_digits])/10^extra_digits
    __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);

    // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
    amount = recip_scale[nzeros];
    __shr_128_long (CQ, Qh, amount);

    diff_expon += nzeros;
  } else {
    // decompose Q as Qh*10^17 + Ql
    //T128 = reciprocals10_128[17];
    T128.w[0] = 0x44909befeb9fad49ull;
    T128.w[1] = 0x000b877aa3236a4bull;
    __mul_128x128_to_256 (P256, CQ, T128);
    //amount = recip_scale[17];
    Q_high = (P256.w[2] >> 44) | (P256.w[3] << (64 - 44));
    Q_low = CQ.w[0] - Q_high * 100000000000000000ull;

    if (!Q_low) {
      diff_expon += 17;

      tdigit[0] = Q_high & 0x3ffffff;
      tdigit[1] = 0;
      QX = Q_high >> 26;
      QX32 = QX;
      nzeros = 0;

      for (j = 0; QX32; j++, QX32 >>= 7) {
	k = (QX32 & 127);
	tdigit[0] += convert_table[j][k][0];
	tdigit[1] += convert_table[j][k][1];
	if (tdigit[0] >= 100000000) {
	  tdigit[0] -= 100000000;
	  tdigit[1]++;
	}
      }

      if (tdigit[1] >= 100000000) {
	tdigit[1] -= 100000000;
	if (tdigit[1] >= 100000000)
	  tdigit[1] -= 100000000;
      }

      digit = tdigit[0];
      if (!digit && !tdigit[1])
	nzeros += 16;
      else {
	if (!digit) {
	  nzeros += 8;
	  digit = tdigit[1];
	}
	// decompose digit
	PD = (UINT64) digit *0x068DB8BBull;
	digit_h = (UINT32) (PD >> 40);
	digit_low = digit - digit_h * 10000;

	if (!digit_low)
	  nzeros += 4;
	else
	  digit_h = digit_low;

	if (!(digit_h & 1))
	  nzeros +=
	    3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			  (digit_h & 7));
      }

      if (nzeros) {
	__mul_64x64_to_128 (CQ, Q_high, reciprocals10_64[nzeros]);

	// now get P/10^extra_digits: shift C64 right by M[extra_digits]-64
	amount = short_recip_scale[nzeros];
	CQ.w[0] = CQ.w[1] >> amount;
      } else
	CQ.w[0] = Q_high;
      CQ.w[1] = 0;

      diff_expon += nzeros;
    } else {
      tdigit[0] = Q_low & 0x3ffffff;
      tdigit[1] = 0;
      QX = Q_low >> 26;
      QX32 = QX;
      nzeros = 0;

      for (j = 0; QX32; j++, QX32 >>= 7) {
	k = (QX32 & 127);
	tdigit[0] += convert_table[j][k][0];
	tdigit[1] += convert_table[j][k][1];
	if (tdigit[0] >= 100000000) {
	  tdigit[0] -= 100000000;
	  tdigit[1]++;
	}
      }

      if (tdigit[1] >= 100000000) {
	tdigit[1] -= 100000000;
	if (tdigit[1] >= 100000000)
	  tdigit[1] -= 100000000;
      }

      digit = tdigit[0];
      if (!digit && !tdigit[1])
	nzeros += 16;
      else {
	if (!digit) {
	  nzeros += 8;
	  digit = tdigit[1];
	}
	// decompose digit
	PD = (UINT64) digit *0x068DB8BBull;
	digit_h = (UINT32) (PD >> 40);
	digit_low = digit - digit_h * 10000;

	if (!digit_low)
	  nzeros += 4;
	else
	  digit_h = digit_low;

	if (!(digit_h & 1))
	  nzeros +=
	    3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			  (digit_h & 7));
      }

      if (nzeros) {
	// get P*(2^M[extra_digits])/10^extra_digits
	__mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);

	//now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
	amount = recip_scale[nzeros];
	__shr_128 (CQ, Qh, amount);
      }
      diff_expon += nzeros;

    }
  }
  get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
  (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
  BID_RETURN (res);
}
#endif

if (diff_expon >= 0) {
#ifdef IEEE_ROUND_NEAREST
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
#ifdef IEEE_ROUND_NEAREST_TIES_AWAY
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
  rmode = rnd_mode;
  if (sign_x ^ sign_y && (unsigned) (rmode - 1) < 2)
    rmode = 3 - rmode;
  switch (rmode) {
  case ROUNDING_TO_NEAREST:	// round to nearest code
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_TIES_AWAY:
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_DOWN:
  case ROUNDING_TO_ZERO:
    break;
  default:	// rounding up
    CQ.w[0]++;
    if (!CQ.w[0])
      CQ.w[1]++;
    break;
  }
#endif
#endif

} else {
#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#endif

  handle_UF_128_rem (&res, sign_x ^ sign_y, diff_expon, CQ,
		     CA4.w[1] | CA4.w[0], &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
  (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
  BID_RETURN (res);

}

get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
BID_RETURN (res);
}


//#define LEAVE_TRAILING_ZEROS

TYPE0_FUNCTION_ARGTYPE1_ARGTYPE2 (UINT128, bid128dd_div, UINT64, x,
				  UINT64, y)

     UINT256 CA4, CA4r, P256;
     UINT128 CX, CY, T128, CQ, CR, CA, TP128, Qh, Ql, res;
     UINT64 sign_x, sign_y, T, carry64, D, Q_high, Q_low, QX, PD,
       valid_y;
     int_float fx, fy, f64;
     UINT32 QX32, tdigit[3], digit, digit_h, digit_low;
     int exponent_x, exponent_y, bin_index, bin_expon, diff_expon, ed2,
       digits_q, amount;
     int nzeros, i, j, k, d5;
     unsigned rmode;
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
     fexcept_t binaryflags = 0;
#endif

valid_y = unpack_BID64 (&sign_y, &exponent_y, &CY.w[0], y);

	// unpack arguments, check for NaN or Infinity
CX.w[1] = 0;
if (!unpack_BID64 (&sign_x, &exponent_x, &CX.w[0], (x))) {
#ifdef SET_STATUS_FLAGS
if ((y & SNAN_MASK64) == SNAN_MASK64)	// y is sNaN
  __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif

    // test if x is NaN
if ((x & NAN_MASK64) == NAN_MASK64) {
#ifdef SET_STATUS_FLAGS
  if ((x & SNAN_MASK64) == SNAN_MASK64)	// sNaN
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[0] = (CX.w[0] & 0x0003ffffffffffffull);
  __mul_64x64_to_128 (res, res.w[0], power10_table_128[18].w[0]);
  res.w[1] |= ((CX.w[0]) & 0xfc00000000000000ull);
  BID_RETURN (res);
}
	   // x is Infinity?
if (((x) & 0x7800000000000000ull) == 0x7800000000000000ull) {
  // check if y is Inf.
  if ((((y) & 0x7c00000000000000ull) == 0x7800000000000000ull))
    // return NaN 
  {
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[1] = 0x7c00000000000000ull;
  res.w[0] = 0;
    BID_RETURN (res);
  }
  if ((((y) & 0x7c00000000000000ull) != 0x7c00000000000000ull)) {
  // otherwise return +/-Inf
  res.w[1] =
    (((x) ^ (y)) & 0x8000000000000000ull) | 0x7800000000000000ull;
  res.w[0] = 0;
  BID_RETURN (res);
  }
}
	   // x is 0
if ((((y) & 0x7800000000000000ull) != 0x7800000000000000ull)) {
    if(!CY.w[0]) {
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  // x=y=0, return NaN
  res.w[1] = 0x7c00000000000000ull;
  res.w[0] = 0;
  BID_RETURN (res);
}
	   // return 0
res.w[1] = ((x) ^ (y)) & 0x8000000000000000ull;
if (((y) & 0x6000000000000000ull) == 0x6000000000000000ull)
  exponent_y = ((UINT32) ((y) >> 51)) & 0x3ff;
else
  exponent_y = ((UINT32) ((y) >> 53)) & 0x3ff;
exponent_x = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS_128;
if (exponent_x > DECIMAL_MAX_EXPON_128)
  exponent_x = DECIMAL_MAX_EXPON_128;
else if (exponent_x < 0)
  exponent_x = 0;
res.w[1] |= (((UINT64) exponent_x) << 49);
res.w[0] = 0;
BID_RETURN (res);
}
}

CY.w[1] = 0;
if (!valid_y) {
  // y is Inf. or NaN

  // test if y is NaN
  if ((y & NAN_MASK64) == NAN_MASK64) {
#ifdef SET_STATUS_FLAGS
    if ((y & SNAN_MASK64) == SNAN_MASK64)	// sNaN
      __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[0] = (CY.w[0] & 0x0003ffffffffffffull);
  __mul_64x64_to_128 (res, res.w[0], power10_table_128[18].w[0]);
  res.w[1] |= ((CY.w[0]) & 0xfc00000000000000ull);
    BID_RETURN (res);
  }
  // y is Infinity?
  if (((y) & 0x7800000000000000ull) == 0x7800000000000000ull) {
    // return +/-0
    res.w[1] = sign_x ^ sign_y;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is 0, return +/-Inf
  res.w[1] =
    (((x) ^ (y)) & 0x8000000000000000ull) | 0x7800000000000000ull;
  res.w[0] = 0;
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, ZERO_DIVIDE_EXCEPTION);
#endif
  BID_RETURN (res);
}
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fegetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
diff_expon = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS_128;

if (__unsigned_compare_gt_128 (CY, CX)) {
  // CX < CY

  // 2^64
  f64.i = 0x5f800000;

  // fx ~ CX,   fy ~ CY
  fx.d = (float) CX.w[1] * f64.d + (float) CX.w[0];
  fy.d = (float) CY.w[1] * f64.d + (float) CY.w[0];
  // expon_cy - expon_cx
  bin_index = (fy.i - fx.i) >> 23;

  if (CX.w[1]) {
    T = power10_index_binexp_128[bin_index].w[0];
    __mul_64x128_short (CA, T, CX);
  } else {
    T128 = power10_index_binexp_128[bin_index];
    __mul_64x128_short (CA, CX.w[0], T128);
  }

  ed2 = 33;
  if (__unsigned_compare_gt_128 (CY, CA))
    ed2++;

  T128 = power10_table_128[ed2];
  __mul_128x128_to_256 (CA4, CA, T128);

  ed2 += estimate_decimal_digits[bin_index];
  CQ.w[0] = CQ.w[1] = 0;
  diff_expon = diff_expon - ed2;

} else {
  // get CQ = CX/CY
  __div_128_by_128 (&CQ, &CR, CX, CY);

  if (!CR.w[1] && !CR.w[0]) {
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,
		pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
  // get number of decimal digits in CQ
  // 2^64
  f64.i = 0x5f800000;
  fx.d = (float) CQ.w[1] * f64.d + (float) CQ.w[0];
  // binary expon. of CQ
  bin_expon = (fx.i - 0x3f800000) >> 23;

  digits_q = estimate_decimal_digits[bin_expon];
  TP128.w[0] = power10_index_binexp_128[bin_expon].w[0];
  TP128.w[1] = power10_index_binexp_128[bin_expon].w[1];
  if (__unsigned_compare_ge_128 (CQ, TP128))
    digits_q++;

  ed2 = 34 - digits_q;
  T128.w[0] = power10_table_128[ed2].w[0];
  T128.w[1] = power10_table_128[ed2].w[1];
  __mul_128x128_to_256 (CA4, CR, T128);
  diff_expon = diff_expon - ed2;
  __mul_128x128_low (CQ, CQ, T128);

}

__div_256_by_128 (&CQ, &CA4, CY);


#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#ifndef LEAVE_TRAILING_ZEROS
  else
#endif
#else
#ifndef LEAVE_TRAILING_ZEROS
  if (!CA4.w[0] && !CA4.w[1])
#endif
#endif
#ifndef LEAVE_TRAILING_ZEROS
    // check whether result is exact
  {
    // check whether CX, CY are short
    if (!CX.w[1] && !CY.w[1] && (CX.w[0] <= 1024) && (CY.w[0] <= 1024)) {
      i = (int) CY.w[0] - 1;
      j = (int) CX.w[0] - 1;
      // difference in powers of 2 factors for Y and X
      nzeros = ed2 - factors[i][0] + factors[j][0];
      // difference in powers of 5 factors
      d5 = ed2 - factors[i][1] + factors[j][1];
      if (d5 < nzeros)
	nzeros = d5;
      // get P*(2^M[extra_digits])/10^extra_digits
      __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);
      //__mul_128x128_to_256(P256, CQ, reciprocals10_128[nzeros]);Qh.w[1]=P256.w[3];Qh.w[0]=P256.w[2];

      // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
      amount = recip_scale[nzeros];
      __shr_128_long (CQ, Qh, amount);

      diff_expon += nzeros;
    } else {
      // decompose Q as Qh*10^17 + Ql
      //T128 = reciprocals10_128[17];
      T128.w[0] = 0x44909befeb9fad49ull;
      T128.w[1] = 0x000b877aa3236a4bull;
      __mul_128x128_to_256 (P256, CQ, T128);
      //amount = recip_scale[17];
      Q_high = (P256.w[2] >> 44) | (P256.w[3] << (64 - 44));
      Q_low = CQ.w[0] - Q_high * 100000000000000000ull;

      if (!Q_low) {
	diff_expon += 17;

	tdigit[0] = Q_high & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_high >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}


	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  __mul_64x64_to_128 (CQ, Q_high, reciprocals10_64[nzeros]);

	  // now get P/10^extra_digits: shift C64 right by M[extra_digits]-64
	  amount = short_recip_scale[nzeros];
	  CQ.w[0] = CQ.w[1] >> amount;
	} else
	  CQ.w[0] = Q_high;
	CQ.w[1] = 0;

	diff_expon += nzeros;
      } else {
	tdigit[0] = Q_low & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_low >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}

	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  // get P*(2^M[extra_digits])/10^extra_digits
	  __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);

	  // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
	  amount = recip_scale[nzeros];
	  __shr_128 (CQ, Qh, amount);
	}
	diff_expon += nzeros;

      }
    }
    get_BID128(&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
#endif

if (diff_expon >= 0) {
#ifdef IEEE_ROUND_NEAREST
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
#ifdef IEEE_ROUND_NEAREST_TIES_AWAY
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
  rmode = rnd_mode;
  if (sign_x ^ sign_y && (unsigned) (rmode - 1) < 2)
    rmode = 3 - rmode;
  switch (rmode) {
  case ROUNDING_TO_NEAREST:	// round to nearest code
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_TIES_AWAY:
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_DOWN:
  case ROUNDING_TO_ZERO:
    break;
  default:	// rounding up
    CQ.w[0]++;
    if (!CQ.w[0])
      CQ.w[1]++;
    break;
  }
#endif
#endif

} else {
#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#endif
  handle_UF_128_rem (&res, sign_x ^ sign_y, diff_expon, CQ,
		     CA4.w[1] | CA4.w[0], &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
  (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
  BID_RETURN (res);

}

get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
BID_RETURN (res);
}


BID128_FUNCTION_ARGTYPE1_ARG128 (bid128dq_div, UINT64, x, y)
     UINT256 CA4, CA4r, P256;
     UINT128 CX, CY, T128, CQ, CR, CA, TP128, Qh, Ql, res;
     UINT64 sign_x, sign_y, T, carry64, D, Q_high, Q_low, QX, valid_y,
       PD;
     int_float fx, fy, f64;
     UINT32 QX32, tdigit[3], digit, digit_h, digit_low;
     int exponent_x, exponent_y, bin_index, bin_expon, diff_expon, ed2,
       digits_q, amount;
     int nzeros, i, j, k, d5;
     unsigned rmode;
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
     fexcept_t binaryflags = 0;
#endif

valid_y = unpack_BID128_value (&sign_y, &exponent_y, &CY, y);

	// unpack arguments, check for NaN or Infinity
CX.w[1] = 0;
if (!unpack_BID64 (&sign_x, &exponent_x, &CX.w[0], x)) {
#ifdef SET_STATUS_FLAGS
if ((y.w[1] & SNAN_MASK64) == SNAN_MASK64)	// y is sNaN
  __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif

    // test if x is NaN
if ((x & NAN_MASK64) == NAN_MASK64) {
#ifdef SET_STATUS_FLAGS
  if ((x & SNAN_MASK64) == SNAN_MASK64)	// sNaN
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[0] = (CX.w[0] & 0x0003ffffffffffffull);
  __mul_64x64_to_128 (res, res.w[0], power10_table_128[18].w[0]);
  res.w[1] |= ((CX.w[0]) & 0xfc00000000000000ull);
  BID_RETURN (res);
}
	   // x is Infinity?
if ((x & 0x7800000000000000ull) == 0x7800000000000000ull) {
  // check if y is Inf.
  if (((y.w[1] & 0x7c00000000000000ull) == 0x7800000000000000ull))
    // return NaN 
  {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  if (((y.w[1] & 0x7c00000000000000ull) != 0x7c00000000000000ull)) {
  // otherwise return +/-Inf
  res.w[1] =
    ((x ^ y.w[1]) & 0x8000000000000000ull) | 0x7800000000000000ull;
  res.w[0] = 0;
  BID_RETURN (res);
  }
}
	   // x is 0
if ((y.w[1] & INFINITY_MASK64) != INFINITY_MASK64) {
  if ((!CY.w[0]) && !(CY.w[1] & 0x0001ffffffffffffull)) {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    // x=y=0, return NaN
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // return 0
  res.w[1] = (x ^ y.w[1]) & 0x8000000000000000ull;
  exponent_x = exponent_x - exponent_y + (DECIMAL_EXPONENT_BIAS_128<<1) - DECIMAL_EXPONENT_BIAS;
  if (exponent_x > DECIMAL_MAX_EXPON_128)
    exponent_x = DECIMAL_MAX_EXPON_128;
  else if (exponent_x < 0)
    exponent_x = 0;
  res.w[1] |= (((UINT64) exponent_x) << 49);
  res.w[0] = 0;
  BID_RETURN (res);
}
}
exponent_x += (DECIMAL_EXPONENT_BIAS_128 - DECIMAL_EXPONENT_BIAS);

if (!valid_y) {
  // y is Inf. or NaN

  // test if y is NaN
  if ((y.w[1] & 0x7c00000000000000ull) == 0x7c00000000000000ull) {
#ifdef SET_STATUS_FLAGS
    if ((y.w[1] & 0x7e00000000000000ull) == 0x7e00000000000000ull)	// sNaN
      __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    res.w[1] = CY.w[1] & QUIET_MASK64;
    res.w[0] = CY.w[0];
    BID_RETURN (res);
  }
  // y is Infinity?
  if ((y.w[1] & 0x7800000000000000ull) == 0x7800000000000000ull) {
    // return +/-0
    res.w[1] = sign_x ^ sign_y;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is 0, return +/-Inf
  res.w[1] =
    ((x ^ y.w[1]) & 0x8000000000000000ull) | 0x7800000000000000ull;
  res.w[0] = 0;
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, ZERO_DIVIDE_EXCEPTION);
#endif
  BID_RETURN (res);
}
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fegetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
diff_expon = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS_128;

if (__unsigned_compare_gt_128 (CY, CX)) {
  // CX < CY

  // 2^64
  f64.i = 0x5f800000;

  // fx ~ CX,   fy ~ CY
  fx.d = (float) CX.w[1] * f64.d + (float) CX.w[0];
  fy.d = (float) CY.w[1] * f64.d + (float) CY.w[0];
  // expon_cy - expon_cx
  bin_index = (fy.i - fx.i) >> 23;

  if (CX.w[1]) {
    T = power10_index_binexp_128[bin_index].w[0];
    __mul_64x128_short (CA, T, CX);
  } else {
    T128 = power10_index_binexp_128[bin_index];
    __mul_64x128_short (CA, CX.w[0], T128);
  }

  ed2 = 33;
  if (__unsigned_compare_gt_128 (CY, CA))
    ed2++;

  T128 = power10_table_128[ed2];
  __mul_128x128_to_256 (CA4, CA, T128);

  ed2 += estimate_decimal_digits[bin_index];
  CQ.w[0] = CQ.w[1] = 0;
  diff_expon = diff_expon - ed2;

} else {
  // get CQ = CX/CY
  __div_128_by_128 (&CQ, &CR, CX, CY);

  if (!CR.w[1] && !CR.w[0]) {
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,
		pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
  // get number of decimal digits in CQ
  // 2^64
  f64.i = 0x5f800000;
  fx.d = (float) CQ.w[1] * f64.d + (float) CQ.w[0];
  // binary expon. of CQ
  bin_expon = (fx.i - 0x3f800000) >> 23;

  digits_q = estimate_decimal_digits[bin_expon];
  TP128.w[0] = power10_index_binexp_128[bin_expon].w[0];
  TP128.w[1] = power10_index_binexp_128[bin_expon].w[1];
  if (__unsigned_compare_ge_128 (CQ, TP128))
    digits_q++;

  ed2 = 34 - digits_q;
  T128.w[0] = power10_table_128[ed2].w[0];
  T128.w[1] = power10_table_128[ed2].w[1];
  __mul_128x128_to_256 (CA4, CR, T128);
  diff_expon = diff_expon - ed2;
  __mul_128x128_low (CQ, CQ, T128);

}

__div_256_by_128 (&CQ, &CA4, CY);

#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#ifndef LEAVE_TRAILING_ZEROS
  else
#endif
#else
#ifndef LEAVE_TRAILING_ZEROS
  if (!CA4.w[0] && !CA4.w[1])
#endif
#endif
#ifndef LEAVE_TRAILING_ZEROS
    // check whether result is exact
  {
    //printf("ed2=%d,nz=%d,a=%d,CQ="LX16","LX16", RH="LX16", RL="LX16"\n",ed2,nzeros,amount,CQ.w[1],CQ.w[0],reciprocals10_128[nzeros].w[1],reciprocals10_128[nzeros].w[0]);fflush(stdout);
    // check whether CX, CY are short
    if (!CX.w[1] && !CY.w[1] && (CX.w[0] <= 1024) && (CY.w[0] <= 1024)) {
      i = (int) CY.w[0] - 1;
      j = (int) CX.w[0] - 1;
      // difference in powers of 2 factors for Y and X
      nzeros = ed2 - factors[i][0] + factors[j][0];
      // difference in powers of 5 factors
      d5 = ed2 - factors[i][1] + factors[j][1];
      if (d5 < nzeros)
	nzeros = d5;
      // get P*(2^M[extra_digits])/10^extra_digits
      __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);
      //__mul_128x128_to_256(P256, CQ, reciprocals10_128[nzeros]);Qh.w[1]=P256.w[3];Qh.w[0]=P256.w[2];

      // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
      amount = recip_scale[nzeros];
      __shr_128_long (CQ, Qh, amount);

      diff_expon += nzeros;
    } else {
      // decompose Q as Qh*10^17 + Ql
      //T128 = reciprocals10_128[17];
      T128.w[0] = 0x44909befeb9fad49ull;
      T128.w[1] = 0x000b877aa3236a4bull;
      __mul_128x128_to_256 (P256, CQ, T128);
      //amount = recip_scale[17];
      Q_high = (P256.w[2] >> 44) | (P256.w[3] << (64 - 44));
      Q_low = CQ.w[0] - Q_high * 100000000000000000ull;

      if (!Q_low) {
	diff_expon += 17;

	tdigit[0] = Q_high & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_high >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}


	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  //printf("i=%d, nz=%d, digit=%d (%d, %016I64x %016I64x)\n",i,nzeros,digit_h,digit,PD,digit_h);fflush(stdout);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  __mul_64x64_to_128 (CQ, Q_high, reciprocals10_64[nzeros]);

	  // now get P/10^extra_digits: shift C64 right by M[extra_digits]-64
	  amount = short_recip_scale[nzeros];
	  CQ.w[0] = CQ.w[1] >> amount;
	} else
	  CQ.w[0] = Q_high;
	CQ.w[1] = 0;

	diff_expon += nzeros;
      } else {
	tdigit[0] = Q_low & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_low >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}

	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  //printf("i=%d, nz=%d, digit=%d (%d, %016I64x %016I64x)\n",i,nzeros,digit_h,digit,PD,digit_h);fflush(stdout);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  // get P*(2^M[extra_digits])/10^extra_digits
	  __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);

	  // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
	  amount = recip_scale[nzeros];
	  __shr_128 (CQ, Qh, amount);
	}
	diff_expon += nzeros;

      }
    }
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,
		pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
#endif

if (diff_expon >= 0) {
#ifdef IEEE_ROUND_NEAREST
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
#ifdef IEEE_ROUND_NEAREST_TIES_AWAY
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
  rmode = rnd_mode;
  if (sign_x ^ sign_y && (unsigned) (rmode - 1) < 2)
    rmode = 3 - rmode;
  switch (rmode) {
  case ROUNDING_TO_NEAREST:	// round to nearest code
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_TIES_AWAY:
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_DOWN:
  case ROUNDING_TO_ZERO:
    break;
  default:	// rounding up
    CQ.w[0]++;
    if (!CQ.w[0])
      CQ.w[1]++;
    break;
  }
#endif
#endif

} else {
#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#endif
  handle_UF_128_rem (&res, sign_x ^ sign_y, diff_expon, CQ,
		     CA4.w[1] | CA4.w[0], &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
  (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
  BID_RETURN (res);
}

get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
BID_RETURN (res);

}


BID128_FUNCTION_ARG128_ARGTYPE2 (bid128qd_div, x, UINT64, y)
     UINT256 CA4, CA4r, P256;
     UINT128 CX, CY, T128, CQ, CR, CA, TP128, Qh, Ql, res;
     UINT64 sign_x, sign_y, T, carry64, D, Q_high, Q_low, QX, PD,
       valid_y;
     int_float fx, fy, f64;
     UINT32 QX32, tdigit[3], digit, digit_h, digit_low;
     int exponent_x, exponent_y, bin_index, bin_expon, diff_expon, ed2,
       digits_q, amount;
     int nzeros, i, j, k, d5, rmode;
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
     fexcept_t binaryflags = 0;
#endif


valid_y = unpack_BID64 (&sign_y, &exponent_y, &CY.w[0], y);
	// unpack arguments, check for NaN or Infinity
if (!unpack_BID128_value (&sign_x, &exponent_x, &CX, x)) {
    // test if x is NaN
if ((x.w[1] & 0x7c00000000000000ull) == 0x7c00000000000000ull) {
#ifdef SET_STATUS_FLAGS
  if ((x.w[1] & 0x7e00000000000000ull) == 0x7e00000000000000ull ||	// sNaN
      (y & 0x7e00000000000000ull) == 0x7e00000000000000ull)
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[1] = (CX.w[1]) & QUIET_MASK64;
  res.w[0] = CX.w[0];
  BID_RETURN (res);
}
    // x is Infinity?
if ((x.w[1] & 0x7800000000000000ull) == 0x7800000000000000ull) {
  // check if y is Inf. 
  if (((y & 0x7c00000000000000ull) == 0x7800000000000000ull))
    // return NaN 
  {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is NaN?
  if (((y & 0x7c00000000000000ull) != 0x7c00000000000000ull))
    // return NaN 
  {
    // return +/-Inf
    res.w[1] = ((x.w[1] ^ y) & 0x8000000000000000ull) |
      0x7800000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
}
    // x is 0
if ((y & 0x7800000000000000ull) < 0x7800000000000000ull) {
	if (!CY.w[0]) {
#ifdef SET_STATUS_FLAGS
    __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    // x=y=0, return NaN
    res.w[1] = 0x7c00000000000000ull;
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // return 0
  res.w[1] = (x.w[1] ^ y) & 0x8000000000000000ull;
  exponent_x = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS;
  if (exponent_x > DECIMAL_MAX_EXPON_128)
    exponent_x = DECIMAL_MAX_EXPON_128;
  else if (exponent_x < 0)
    exponent_x = 0;
  res.w[1] |= (((UINT64) exponent_x) << 49);
  res.w[0] = 0;
  BID_RETURN (res);
}
}
CY.w[1] = 0;
if (!valid_y) {
  // y is Inf. or NaN

  // test if y is NaN
  if ((y & NAN_MASK64) == NAN_MASK64) {
#ifdef SET_STATUS_FLAGS
    if ((y & SNAN_MASK64) == SNAN_MASK64)	// sNaN
      __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
  res.w[0] = (CY.w[0] & 0x0003ffffffffffffull);
  __mul_64x64_to_128 (res, res.w[0], power10_table_128[18].w[0]);
  res.w[1] |= ((CY.w[0]) & 0xfc00000000000000ull);
    BID_RETURN (res);
  }
  // y is Infinity?
  if ((y & INFINITY_MASK64) == INFINITY_MASK64) {
    // return +/-0
    res.w[1] = ((x.w[1] ^ y) & 0x8000000000000000ull);
    res.w[0] = 0;
    BID_RETURN (res);
  }
  // y is 0
#ifdef SET_STATUS_FLAGS
  __set_status_flags (pfpsf, ZERO_DIVIDE_EXCEPTION);
#endif
  res.w[1] = (sign_x ^ sign_y) | INFINITY_MASK64;
  res.w[0] = 0;
  BID_RETURN (res);
}
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fegetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
diff_expon = exponent_x - exponent_y + DECIMAL_EXPONENT_BIAS;

if (__unsigned_compare_gt_128 (CY, CX)) {
  // CX < CY

  // 2^64
  f64.i = 0x5f800000;

  // fx ~ CX,   fy ~ CY
  fx.d = (float) CX.w[1] * f64.d + (float) CX.w[0];
  fy.d = (float) CY.w[1] * f64.d + (float) CY.w[0];
  // expon_cy - expon_cx
  bin_index = (fy.i - fx.i) >> 23;

  if (CX.w[1]) {
    T = power10_index_binexp_128[bin_index].w[0];
    __mul_64x128_short (CA, T, CX);
  } else {
    T128 = power10_index_binexp_128[bin_index];
    __mul_64x128_short (CA, CX.w[0], T128);
  }

  ed2 = 33;
  if (__unsigned_compare_gt_128 (CY, CA))
    ed2++;

  T128 = power10_table_128[ed2];
  __mul_128x128_to_256 (CA4, CA, T128);

  ed2 += estimate_decimal_digits[bin_index];
  CQ.w[0] = CQ.w[1] = 0;
  diff_expon = diff_expon - ed2;

} else {
  // get CQ = CX/CY
  __div_128_by_128 (&CQ, &CR, CX, CY);

  if (!CR.w[1] && !CR.w[0]) {
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,
		pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
  // get number of decimal digits in CQ
  // 2^64
  f64.i = 0x5f800000;
  fx.d = (float) CQ.w[1] * f64.d + (float) CQ.w[0];
  // binary expon. of CQ
  bin_expon = (fx.i - 0x3f800000) >> 23;

  digits_q = estimate_decimal_digits[bin_expon];
  TP128.w[0] = power10_index_binexp_128[bin_expon].w[0];
  TP128.w[1] = power10_index_binexp_128[bin_expon].w[1];
  if (__unsigned_compare_ge_128 (CQ, TP128))
    digits_q++;

  ed2 = 34 - digits_q;
  T128.w[0] = power10_table_128[ed2].w[0];
  T128.w[1] = power10_table_128[ed2].w[1];
  __mul_128x128_to_256 (CA4, CR, T128);
  diff_expon = diff_expon - ed2;
  __mul_128x128_low (CQ, CQ, T128);

}

__div_256_by_128 (&CQ, &CA4, CY);


#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#ifndef LEAVE_TRAILING_ZEROS
  else
#endif
#else
#ifndef LEAVE_TRAILING_ZEROS
  if (!CA4.w[0] && !CA4.w[1])
#endif
#endif
#ifndef LEAVE_TRAILING_ZEROS
    // check whether result is exact
  {
    // check whether CX, CY are short
    if (!CX.w[1] && !CY.w[1] && (CX.w[0] <= 1024) && (CY.w[0] <= 1024)) {
      i = (int) CY.w[0] - 1;
      j = (int) CX.w[0] - 1;
      // difference in powers of 2 factors for Y and X
      nzeros = ed2 - factors[i][0] + factors[j][0];
      // difference in powers of 5 factors
      d5 = ed2 - factors[i][1] + factors[j][1];
      if (d5 < nzeros)
	nzeros = d5;
      // get P*(2^M[extra_digits])/10^extra_digits
      __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);
      //__mul_128x128_to_256(P256, CQ, reciprocals10_128[nzeros]);Qh.w[1]=P256.w[3];Qh.w[0]=P256.w[2];

      // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
      amount = recip_scale[nzeros];
      __shr_128_long (CQ, Qh, amount);

      diff_expon += nzeros;
    } else {
      // decompose Q as Qh*10^17 + Ql
      //T128 = reciprocals10_128[17];
      T128.w[0] = 0x44909befeb9fad49ull;
      T128.w[1] = 0x000b877aa3236a4bull;
      __mul_128x128_to_256 (P256, CQ, T128);
      //amount = recip_scale[17];
      Q_high = (P256.w[2] >> 44) | (P256.w[3] << (64 - 44));
      Q_low = CQ.w[0] - Q_high * 100000000000000000ull;

      if (!Q_low) {
	diff_expon += 17;

	tdigit[0] = Q_high & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_high >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}


	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  __mul_64x64_to_128 (CQ, Q_high, reciprocals10_64[nzeros]);

	  // now get P/10^extra_digits: shift C64 right by M[extra_digits]-64
	  amount = short_recip_scale[nzeros];
	  CQ.w[0] = CQ.w[1] >> amount;
	} else
	  CQ.w[0] = Q_high;
	CQ.w[1] = 0;

	diff_expon += nzeros;
      } else {
	tdigit[0] = Q_low & 0x3ffffff;
	tdigit[1] = 0;
	QX = Q_low >> 26;
	QX32 = QX;
	nzeros = 0;

	for (j = 0; QX32; j++, QX32 >>= 7) {
	  k = (QX32 & 127);
	  tdigit[0] += convert_table[j][k][0];
	  tdigit[1] += convert_table[j][k][1];
	  if (tdigit[0] >= 100000000) {
	    tdigit[0] -= 100000000;
	    tdigit[1]++;
	  }
	}

	if (tdigit[1] >= 100000000) {
	  tdigit[1] -= 100000000;
	  if (tdigit[1] >= 100000000)
	    tdigit[1] -= 100000000;
	}

	digit = tdigit[0];
	if (!digit && !tdigit[1])
	  nzeros += 16;
	else {
	  if (!digit) {
	    nzeros += 8;
	    digit = tdigit[1];
	  }
	  // decompose digit
	  PD = (UINT64) digit *0x068DB8BBull;
	  digit_h = (UINT32) (PD >> 40);
	  digit_low = digit - digit_h * 10000;

	  if (!digit_low)
	    nzeros += 4;
	  else
	    digit_h = digit_low;

	  if (!(digit_h & 1))
	    nzeros +=
	      3 & (UINT32) (packed_10000_zeros[digit_h >> 3] >>
			    (digit_h & 7));
	}

	if (nzeros) {
	  // get P*(2^M[extra_digits])/10^extra_digits
	  __mul_128x128_full (Qh, Ql, CQ, reciprocals10_128[nzeros]);

	  // now get P/10^extra_digits: shift Q_high right by M[extra_digits]-128
	  amount = recip_scale[nzeros];
	  __shr_128 (CQ, Qh, amount);
	}
	diff_expon += nzeros;

      }
    }
    get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode,pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
    (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
    BID_RETURN (res);
  }
#endif

if (diff_expon >= 0) {
#ifdef IEEE_ROUND_NEAREST
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
#ifdef IEEE_ROUND_NEAREST_TIES_AWAY
  // rounding
  // 2*CA4 - CY
  CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
  CA4r.w[0] = CA4.w[0] + CA4.w[0];
  __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
  CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;

  D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
  carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;

  CQ.w[0] += carry64;
  if (CQ.w[0] < carry64)
    CQ.w[1]++;
#else
  rmode = rnd_mode;
  if (sign_x ^ sign_y && (unsigned) (rmode - 1) < 2)
    rmode = 3 - rmode;
  switch (rmode) {
  case ROUNDING_TO_NEAREST:	// round to nearest code
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 1 : 0;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) & ((CQ.w[0]) | D);
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_TIES_AWAY:
    // rounding
    // 2*CA4 - CY
    CA4r.w[1] = (CA4.w[1] + CA4.w[1]) | (CA4.w[0] >> 63);
    CA4r.w[0] = CA4.w[0] + CA4.w[0];
    __sub_borrow_out (CA4r.w[0], carry64, CA4r.w[0], CY.w[0]);
    CA4r.w[1] = CA4r.w[1] - CY.w[1] - carry64;
    D = (CA4r.w[1] | CA4r.w[0]) ? 0 : 1;
    carry64 = (1 + (((SINT64) CA4r.w[1]) >> 63)) | D;
    CQ.w[0] += carry64;
    if (CQ.w[0] < carry64)
      CQ.w[1]++;
    break;
  case ROUNDING_DOWN:
  case ROUNDING_TO_ZERO:
    break;
  default:	// rounding up
    CQ.w[0]++;
    if (!CQ.w[0])
      CQ.w[1]++;
    break;
  }
#endif
#endif

} else {
#ifdef SET_STATUS_FLAGS
  if (CA4.w[0] || CA4.w[1]) {
    // set status flags
    __set_status_flags (pfpsf, INEXACT_EXCEPTION);
  }
#endif
  handle_UF_128_rem (&res, sign_x ^ sign_y, diff_expon, CQ,
		     CA4.w[1] | CA4.w[0], &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
  (void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
  BID_RETURN (res);

}

get_BID128 (&res, sign_x ^ sign_y, diff_expon, CQ, &rnd_mode, pfpsf);
#ifdef UNCHANGED_BINARY_STATUS_FLAGS
(void) fesetexceptflag (&binaryflags, FE_ALL_FLAGS);
#endif
BID_RETURN (res);

}
