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1 734 jeremybenn 
/* Copyright (C) 2007, 2009  Free Software Foundation, Inc.
2 
 
3 
This file is part of GCC.
4 
 
5 
GCC is free software; you can redistribute it and/or modify it under
6 
the terms of the GNU General Public License as published by the Free
7 
Software Foundation; either version 3, or (at your option) any later
8 
version.
9 
 
10 
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
11 
WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 
for more details.
14 
 
15 
Under Section 7 of GPL version 3, you are granted additional
16 
permissions described in the GCC Runtime Library Exception, version
17 
3.1, as published by the Free Software Foundation.
18 
 
19 
You should have received a copy of the GNU General Public License and
20 
a copy of the GCC Runtime Library Exception along with this program;
21 
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
22 
<http://www.gnu.org/licenses/>.  */
23 
 
24 
#ifndef _DIV_MACROS_H_
25 
#define _DIV_MACROS_H_
26 
 
27 
#include "bid_internal.h"
28 
 
29 
#define FENCE __fence
30 
//#define FENCE
31 
 
32 
//#define DOUBLE_EXTENDED_ON
33 
 
34 
#if DOUBLE_EXTENDED_ON
35 
 
36 
 
37 
__BID_INLINE__ void
38 
__div_128_by_128 (UINT128 * pCQ, UINT128 * pCR, UINT128 CX, UINT128 CY) {
39 
  UINT128 CB, CB2, CB4, CB8, CQB, CA;
40 
  int_double d64, dm64, ds;
41 
  int_float t64;
42 
  double dx, dq, dqh;
43 
  BINARY80 lq, lx, ly;
44 
  UINT64 Rh, R, B2, B4, Ph, Ql, Ql2, carry, Qh;
45 
 
46 
  if (!CY.w[1]) {
47 
    pCR->w[1] = 0;
48 
 
49 
    if (!CX.w[1]) {
50 
      pCQ->w[0] = CX.w[0] / CY.w[0];
51 
      pCQ->w[1] = 0;
52 
      pCR->w[1] = 0;
53 
      pCR->w[0] = CX.w[0] - pCQ->w[0] * CY.w[0];
54 
    } else {
55 
 
56 
      // This path works for CX<2^116 only
57 
 
58 
      // 2^64
59 
      d64.i = 0x43f0000000000000;
60 
      // 2^64
61 
      dm64.i = 0x3bf0000000000000;
62 
      // 1.5*2^(-52)
63 
      ds.i = 0x3cb8000000000000;
64 
      dx = (BINARY80) CX.w[1] * d64.d + (BINARY80) CX.w[0];
65 
      dq = dx / (BINARY80) CY.w[0];
66 
      dq -= dq * (ds.d);
67 
      dqh = dq * dm64.d;
68 
      Qh = (UINT64) dqh;
69 
      Ql = (UINT64) (dq - ((double) Qh) * d64.d);
70 
 
71 
      Rh = CX.w[0] - Ql * CY.w[0];
72 
      Ql2 = Rh / CY.w[0];
73 
      pCR->w[0] = Rh - Ql2 * CY.w[0];
74 
      __add_carry_out ((pCQ->w[0]), carry, Ql, Ql2);
75 
      pCQ->w[1] = Qh + carry;
76 
 
77 
    }
78 
    return;
79 
  }
80 
  // now CY.w[1] > 0
81 
 
82 
  // 2^64
83 
  t64.i = 0x5f800000;
84 
  lx = (BINARY80) CX.w[1] * (BINARY80) t64.d + (BINARY80) CX.w[0];
85 
  ly = (BINARY80) CY.w[1] * (BINARY80) t64.d + (BINARY80) CY.w[0];
86 
  lq = lx / ly;
87 
  pCQ->w[0] = (UINT64) lq;
88 
 
89 
  pCQ->w[1] = 0;
90 
 
91 
  if (!pCQ->w[0]) {
92 
    /*if(__unsigned_compare_ge_128(CX,CY))
93 
       {
94 
       pCQ->w[0] = 1;
95 
       __sub_128_128((*pCR), CX, CY);
96 
       }
97 
       else */
98 
    {
99 
      pCR->w[1] = CX.w[1];
100 
      pCR->w[0] = CX.w[0];
101 
    }
102 
    return;
103 
  }
104 
 
105 
  if (CY.w[1] >= 16 || pCQ->w[0] <= 0x1000000000000000ull) {
106 
    pCQ->w[0] = (UINT64) lq - 1;
107 
    __mul_64x128_full (Ph, CQB, (pCQ->w[0]), CY);
108 
    __sub_128_128 (CA, CX, CQB);
109 
    if (__unsigned_compare_ge_128 (CA, CY)) {
110 
      __sub_128_128 (CA, CA, CY);
111 
      pCQ->w[0]++;
112 
      if (__unsigned_compare_ge_128 (CA, CY)) {
113 
        __sub_128_128 (CA, CA, CY);
114 
        pCQ->w[0]++;
115 
      }
116 
    }
117 
    pCR->w[1] = CA.w[1];
118 
    pCR->w[0] = CA.w[0];
119 
  } else {
120 
    pCQ->w[0] = (UINT64) lq - 6;
121 
 
122 
    __mul_64x128_full (Ph, CQB, (pCQ->w[0]), CY);
123 
    __sub_128_128 (CA, CX, CQB);
124 
 
125 
    CB8.w[1] = (CY.w[1] << 3) | (CY.w[0] >> 61);
126 
    CB8.w[0] = CY.w[0] << 3;
127 
    CB4.w[1] = (CY.w[1] << 2) | (CY.w[0] >> 62);
128 
    CB4.w[0] = CY.w[0] << 2;
129 
    CB2.w[1] = (CY.w[1] << 1) | (CY.w[0] >> 63);
130 
    CB2.w[0] = CY.w[0] << 1;
131 
 
132 
    if (__unsigned_compare_ge_128 (CA, CB8)) {
133 
      pCQ->w[0] += 8;
134 
      __sub_128_128 (CA, CA, CB8);
135 
    }
136 
    if (__unsigned_compare_ge_128 (CA, CB4)) {
137 
      pCQ->w[0] += 4;
138 
      __sub_128_128 (CA, CA, CB4);
139 
    }
140 
    if (__unsigned_compare_ge_128 (CA, CB2)) {
141 
      pCQ->w[0] += 2;
142 
      __sub_128_128 (CA, CA, CB2);
143 
    }
144 
    if (__unsigned_compare_ge_128 (CA, CY)) {
145 
      pCQ->w[0] += 1;
146 
      __sub_128_128 (CA, CA, CY);
147 
    }
148 
 
149 
    pCR->w[1] = CA.w[1];
150 
    pCR->w[0] = CA.w[0];
151 
  }
152 
}
153 
 
154 
 
155 
 
156 
 
157 
 
158 
 
159 
__BID_INLINE__ void
160 
__div_256_by_128 (UINT128 * pCQ, UINT256 * pCA4, UINT128 CY) {
161 
  UINT256 CQ2Y;
162 
  UINT128 CQ2, CQ3Y;
163 
  UINT64 Q3, carry64;
164 
  int_double d64;
165 
  BINARY80 lx, ly, lq, l64, l128;
166 
 
167 
  // 2^64
168 
  d64.i = 0x43f0000000000000ull;
169 
  l64 = (BINARY80) d64.d;
170 
  // 2^128
171 
  l128 = l64 * l64;
172 
 
173 
  lx =
174 
    ((BINARY80) (*pCA4).w[3] * l64 +
175 
     (BINARY80) (*pCA4).w[2]) * l128 +
176 
    (BINARY80) (*pCA4).w[1] * l64 + (BINARY80) (*pCA4).w[0];
177 
  ly = (BINARY80) CY.w[1] * l128 + (BINARY80) CY.w[0] * l64;
178 
 
179 
  lq = lx / ly;
180 
  CQ2.w[1] = (UINT64) lq;
181 
  lq = (lq - CQ2.w[1]) * l64;
182 
  CQ2.w[0] = (UINT64) lq;
183 
 
184 
  // CQ2*CY
185 
  __mul_128x128_to_256 (CQ2Y, CY, CQ2);
186 
 
187 
  // CQ2Y <= (*pCA4) ?
188 
  if (CQ2Y.w[3] < (*pCA4).w[3]
189 
      || (CQ2Y.w[3] == (*pCA4).w[3]
190 
          && (CQ2Y.w[2] < (*pCA4).w[2]
191 
              || (CQ2Y.w[2] == (*pCA4).w[2]
192 
                  && (CQ2Y.w[1] < (*pCA4).w[1]
193 
                      || (CQ2Y.w[1] == (*pCA4).w[1]
194 
                          && (CQ2Y.w[0] <= (*pCA4).w[0]))))))) {
195 
 
196 
    // (*pCA4) -CQ2Y, guaranteed below 5*2^49*CY < 5*2^(49+128)
197 
    __sub_borrow_out ((*pCA4).w[0], carry64, (*pCA4).w[0], CQ2Y.w[0]);
198 
    __sub_borrow_in_out ((*pCA4).w[1], carry64, (*pCA4).w[1], CQ2Y.w[1],
199 
                         carry64);
200 
    (*pCA4).w[2] = (*pCA4).w[2] - CQ2Y.w[2] - carry64;
201 
 
202 
    lx = ((BINARY80) (*pCA4).w[2] * l128 +
203 
          ((BINARY80) (*pCA4).w[1] * l64 +
204 
           (BINARY80) (*pCA4).w[0])) * l64;
205 
    lq = lx / ly;
206 
    Q3 = (UINT64) lq;
207 
 
208 
    if (Q3) {
209 
      Q3--;
210 
      __mul_64x128_short (CQ3Y, Q3, CY);
211 
      __sub_borrow_out ((*pCA4).w[0], carry64, (*pCA4).w[0], CQ3Y.w[0]);
212 
      (*pCA4).w[1] = (*pCA4).w[1] - CQ3Y.w[1] - carry64;
213 
 
214 
      if ((*pCA4).w[1] > CY.w[1]
215 
          || ((*pCA4).w[1] == CY.w[1] && (*pCA4).w[0] >= CY.w[0])) {
216 
        Q3++;
217 
        __sub_borrow_out ((*pCA4).w[0], carry64, (*pCA4).w[0], CY.w[0]);
218 
        (*pCA4).w[1] = (*pCA4).w[1] - CY.w[1] - carry64;
219 
        if ((*pCA4).w[1] > CY.w[1]
220 
            || ((*pCA4).w[1] == CY.w[1] && (*pCA4).w[0] >= CY.w[0])) {
221 
          Q3++;
222 
          __sub_borrow_out ((*pCA4).w[0], carry64, (*pCA4).w[0],
223 
                            CY.w[0]);
224 
          (*pCA4).w[1] = (*pCA4).w[1] - CY.w[1] - carry64;
225 
        }
226 
      }
227 
      // add Q3 to Q2
228 
      __add_carry_out (CQ2.w[0], carry64, Q3, CQ2.w[0]);
229 
      CQ2.w[1] += carry64;
230 
    }
231 
  } else {
232 
    // CQ2Y - (*pCA4), guaranteed below 5*2^(49+128)
233 
    __sub_borrow_out ((*pCA4).w[0], carry64, CQ2Y.w[0], (*pCA4).w[0]);
234 
    __sub_borrow_in_out ((*pCA4).w[1], carry64, CQ2Y.w[1], (*pCA4).w[1],
235 
                         carry64);
236 
    (*pCA4).w[2] = CQ2Y.w[2] - (*pCA4).w[2] - carry64;
237 
 
238 
    lx =
239 
      ((BINARY80) (*pCA4).w[2] * l128 +
240 
       (BINARY80) (*pCA4).w[1] * l64 + (BINARY80) (*pCA4).w[0]) * l64;
241 
    lq = lx / ly;
242 
    Q3 = 1 + (UINT64) lq;
243 
 
244 
    __mul_64x128_short (CQ3Y, Q3, CY);
245 
    __sub_borrow_out ((*pCA4).w[0], carry64, CQ3Y.w[0], (*pCA4).w[0]);
246 
    (*pCA4).w[1] = CQ3Y.w[1] - (*pCA4).w[1] - carry64;
247 
 
248 
    if ((SINT64) (*pCA4).w[1] > (SINT64) CY.w[1]
249 
        || ((*pCA4).w[1] == CY.w[1] && (*pCA4).w[0] >= CY.w[0])) {
250 
      Q3--;
251 
      __sub_borrow_out ((*pCA4).w[0], carry64, (*pCA4).w[0], CY.w[0]);
252 
      (*pCA4).w[1] = (*pCA4).w[1] - CY.w[1] - carry64;
253 
    } else if ((SINT64) (*pCA4).w[1] < 0) {
254 
      Q3++;
255 
      __add_carry_out ((*pCA4).w[0], carry64, (*pCA4).w[0], CY.w[0]);
256 
      (*pCA4).w[1] = (*pCA4).w[1] + CY.w[1] + carry64;
257 
    }
258 
    // subtract Q3 from Q2
259 
    __sub_borrow_out (CQ2.w[0], carry64, CQ2.w[0], Q3);
260 
    CQ2.w[1] -= carry64;
261 
  }
262 
 
263 
  // (*pCQ) + CQ2 + carry
264 
  __add_carry_out ((*pCQ).w[0], carry64, CQ2.w[0], (*pCQ).w[0]);
265 
  (*pCQ).w[1] = (*pCQ).w[1] + CQ2.w[1] + carry64;
266 
 
267 
 
268 
}
269 
#else
270 
 
271 
__BID_INLINE__ void
272 
__div_128_by_128 (UINT128 * pCQ, UINT128 * pCR, UINT128 CX0, UINT128 CY) {
273 
  UINT128 CY36, CY51, CQ, A2, CX, CQT;
274 
  UINT64 Q;
275 
  int_double t64, d49, d60;
276 
  double lx, ly, lq;
277 
 
278 
  if (!CX0.w[1] && !CY.w[1]) {
279 
    pCQ->w[0] = CX0.w[0] / CY.w[0];
280 
    pCQ->w[1] = 0;
281 
    pCR->w[1] = pCR->w[0] = 0;
282 
    pCR->w[0] = CX0.w[0] - pCQ->w[0] * CY.w[0];
283 
    return;
284 
  }
285 
 
286 
  CX.w[1] = CX0.w[1];
287 
  CX.w[0] = CX0.w[0];
288 
 
289 
  // 2^64
290 
  t64.i = 0x43f0000000000000ull;
291 
  lx = (double) CX.w[1] * t64.d + (double) CX.w[0];
292 
  ly = (double) CY.w[1] * t64.d + (double) CY.w[0];
293 
  lq = lx / ly;
294 
 
295 
  CY36.w[1] = CY.w[0] >> (64 - 36);
296 
  CY36.w[0] = CY.w[0] << 36;
297 
 
298 
  CQ.w[1] = CQ.w[0] = 0;
299 
 
300 
  // Q >= 2^100 ?
301 
  if (!CY.w[1] && !CY36.w[1] && (CX.w[1] >= CY36.w[0])) {
302 
    // then Q >= 2^100
303 
 
304 
    // 2^(-60)*CX/CY
305 
    d60.i = 0x3c30000000000000ull;
306 
    lq *= d60.d;
307 
    Q = (UINT64) lq - 4ull;
308 
 
309 
    // Q*CY
310 
    __mul_64x64_to_128 (A2, Q, CY.w[0]);
311 
 
312 
    // A2 <<= 60
313 
    A2.w[1] = (A2.w[1] << 60) | (A2.w[0] >> (64 - 60));
314 
    A2.w[0] <<= 60;
315 
 
316 
    __sub_128_128 (CX, CX, A2);
317 
 
318 
    lx = (double) CX.w[1] * t64.d + (double) CX.w[0];
319 
    lq = lx / ly;
320 
 
321 
    CQ.w[1] = Q >> (64 - 60);
322 
    CQ.w[0] = Q << 60;
323 
  }
324 
 
325 
 
326 
  CY51.w[1] = (CY.w[1] << 51) | (CY.w[0] >> (64 - 51));
327 
  CY51.w[0] = CY.w[0] << 51;
328 
 
329 
  if (CY.w[1] < (UINT64) (1 << (64 - 51))
330 
      && (__unsigned_compare_gt_128 (CX, CY51))) {
331 
    // Q > 2^51
332 
 
333 
    // 2^(-49)*CX/CY
334 
    d49.i = 0x3ce0000000000000ull;
335 
    lq *= d49.d;
336 
 
337 
    Q = (UINT64) lq - 1ull;
338 
 
339 
    // Q*CY
340 
    __mul_64x64_to_128 (A2, Q, CY.w[0]);
341 
    A2.w[1] += Q * CY.w[1];
342 
 
343 
    // A2 <<= 49
344 
    A2.w[1] = (A2.w[1] << 49) | (A2.w[0] >> (64 - 49));
345 
    A2.w[0] <<= 49;
346 
 
347 
    __sub_128_128 (CX, CX, A2);
348 
 
349 
    CQT.w[1] = Q >> (64 - 49);
350 
    CQT.w[0] = Q << 49;
351 
    __add_128_128 (CQ, CQ, CQT);
352 
 
353 
    lx = (double) CX.w[1] * t64.d + (double) CX.w[0];
354 
    lq = lx / ly;
355 
  }
356 
 
357 
  Q = (UINT64) lq;
358 
 
359 
  __mul_64x64_to_128 (A2, Q, CY.w[0]);
360 
  A2.w[1] += Q * CY.w[1];
361 
 
362 
  __sub_128_128 (CX, CX, A2);
363 
  if ((SINT64) CX.w[1] < 0) {
364 
    Q--;
365 
    CX.w[0] += CY.w[0];
366 
    if (CX.w[0] < CY.w[0])
367 
      CX.w[1]++;
368 
    CX.w[1] += CY.w[1];
369 
    if ((SINT64) CX.w[1] < 0) {
370 
      Q--;
371 
      CX.w[0] += CY.w[0];
372 
      if (CX.w[0] < CY.w[0])
373 
        CX.w[1]++;
374 
      CX.w[1] += CY.w[1];
375 
    }
376 
  } else if (__unsigned_compare_ge_128 (CX, CY)) {
377 
    Q++;
378 
    __sub_128_128 (CX, CX, CY);
379 
  }
380 
 
381 
  __add_128_64 (CQ, CQ, Q);
382 
 
383 
 
384 
  pCQ->w[1] = CQ.w[1];
385 
  pCQ->w[0] = CQ.w[0];
386 
  pCR->w[1] = CX.w[1];
387 
  pCR->w[0] = CX.w[0];
388 
  return;
389 
}
390 
 
391 
 
392 
__BID_INLINE__ void
393 
__div_256_by_128 (UINT128 * pCQ, UINT256 * pCA4, UINT128 CY) {
394 
  UINT256 CA4, CA2, CY51, CY36;
395 
  UINT128 CQ, A2, A2h, CQT;
396 
  UINT64 Q, carry64;
397 
  int_double t64, d49, d60;
398 
  double lx, ly, lq, d128, d192;
399 
 
400 
  // the quotient is assumed to be at most 113 bits,
401 
  // as needed by BID128 divide routines
402 
 
403 
  // initial dividend
404 
  CA4.w[3] = (*pCA4).w[3];
405 
  CA4.w[2] = (*pCA4).w[2];
406 
  CA4.w[1] = (*pCA4).w[1];
407 
  CA4.w[0] = (*pCA4).w[0];
408 
  CQ.w[1] = (*pCQ).w[1];
409 
  CQ.w[0] = (*pCQ).w[0];
410 
 
411 
  // 2^64
412 
  t64.i = 0x43f0000000000000ull;
413 
  d128 = t64.d * t64.d;
414 
  d192 = d128 * t64.d;
415 
  lx = (double) CA4.w[3] * d192 + ((double) CA4.w[2] * d128 +
416 
                                   ((double) CA4.w[1] * t64.d +
417 
                                    (double) CA4.w[0]));
418 
  ly = (double) CY.w[1] * t64.d + (double) CY.w[0];
419 
  lq = lx / ly;
420 
 
421 
  CY36.w[2] = CY.w[1] >> (64 - 36);
422 
  CY36.w[1] = (CY.w[1] << 36) | (CY.w[0] >> (64 - 36));
423 
  CY36.w[0] = CY.w[0] << 36;
424 
 
425 
  CQ.w[1] = (*pCQ).w[1];
426 
  CQ.w[0] = (*pCQ).w[0];
427 
 
428 
  // Q >= 2^100 ?
429 
  if (CA4.w[3] > CY36.w[2]
430 
      || (CA4.w[3] == CY36.w[2]
431 
          && (CA4.w[2] > CY36.w[1]
432 
              || (CA4.w[2] == CY36.w[1] && CA4.w[1] >= CY36.w[0])))) {
433 
    // 2^(-60)*CA4/CY
434 
    d60.i = 0x3c30000000000000ull;
435 
    lq *= d60.d;
436 
    Q = (UINT64) lq - 4ull;
437 
 
438 
    // Q*CY
439 
    __mul_64x128_to_192 (CA2, Q, CY);
440 
 
441 
    // CA2 <<= 60
442 
    // CA2.w[3] = CA2.w[2] >> (64-60);
443 
    CA2.w[2] = (CA2.w[2] << 60) | (CA2.w[1] >> (64 - 60));
444 
    CA2.w[1] = (CA2.w[1] << 60) | (CA2.w[0] >> (64 - 60));
445 
    CA2.w[0] <<= 60;
446 
 
447 
    // CA4 -= CA2
448 
    __sub_borrow_out (CA4.w[0], carry64, CA4.w[0], CA2.w[0]);
449 
    __sub_borrow_in_out (CA4.w[1], carry64, CA4.w[1], CA2.w[1],
450 
                         carry64);
451 
    CA4.w[2] = CA4.w[2] - CA2.w[2] - carry64;
452 
 
453 
    lx = ((double) CA4.w[2] * d128 +
454 
          ((double) CA4.w[1] * t64.d + (double) CA4.w[0]));
455 
    lq = lx / ly;
456 
 
457 
    CQT.w[1] = Q >> (64 - 60);
458 
    CQT.w[0] = Q << 60;
459 
    __add_128_128 (CQ, CQ, CQT);
460 
  }
461 
 
462 
  CY51.w[2] = CY.w[1] >> (64 - 51);
463 
  CY51.w[1] = (CY.w[1] << 51) | (CY.w[0] >> (64 - 51));
464 
  CY51.w[0] = CY.w[0] << 51;
465 
 
466 
  if (CA4.w[2] > CY51.w[2] || ((CA4.w[2] == CY51.w[2])
467 
                               &&
468 
                               (__unsigned_compare_gt_128 (CA4, CY51))))
469 
  {
470 
    // Q > 2^51
471 
 
472 
    // 2^(-49)*CA4/CY
473 
    d49.i = 0x3ce0000000000000ull;
474 
    lq *= d49.d;
475 
 
476 
    Q = (UINT64) lq - 1ull;
477 
 
478 
    // Q*CY
479 
    __mul_64x64_to_128 (A2, Q, CY.w[0]);
480 
    __mul_64x64_to_128 (A2h, Q, CY.w[1]);
481 
    A2.w[1] += A2h.w[0];
482 
    if (A2.w[1] < A2h.w[0])
483 
      A2h.w[1]++;
484 
 
485 
    // A2 <<= 49
486 
    CA2.w[2] = (A2h.w[1] << 49) | (A2.w[1] >> (64 - 49));
487 
    CA2.w[1] = (A2.w[1] << 49) | (A2.w[0] >> (64 - 49));
488 
    CA2.w[0] = A2.w[0] << 49;
489 
 
490 
    __sub_borrow_out (CA4.w[0], carry64, CA4.w[0], CA2.w[0]);
491 
    __sub_borrow_in_out (CA4.w[1], carry64, CA4.w[1], CA2.w[1],
492 
                         carry64);
493 
    CA4.w[2] = CA4.w[2] - CA2.w[2] - carry64;
494 
 
495 
    CQT.w[1] = Q >> (64 - 49);
496 
    CQT.w[0] = Q << 49;
497 
    __add_128_128 (CQ, CQ, CQT);
498 
 
499 
    lx = ((double) CA4.w[2] * d128 +
500 
          ((double) CA4.w[1] * t64.d + (double) CA4.w[0]));
501 
    lq = lx / ly;
502 
  }
503 
 
504 
  Q = (UINT64) lq;
505 
  __mul_64x64_to_128 (A2, Q, CY.w[0]);
506 
  A2.w[1] += Q * CY.w[1];
507 
 
508 
  __sub_128_128 (CA4, CA4, A2);
509 
  if ((SINT64) CA4.w[1] < 0) {
510 
    Q--;
511 
    CA4.w[0] += CY.w[0];
512 
    if (CA4.w[0] < CY.w[0])
513 
      CA4.w[1]++;
514 
    CA4.w[1] += CY.w[1];
515 
    if ((SINT64) CA4.w[1] < 0) {
516 
      Q--;
517 
      CA4.w[0] += CY.w[0];
518 
      if (CA4.w[0] < CY.w[0])
519 
        CA4.w[1]++;
520 
      CA4.w[1] += CY.w[1];
521 
    }
522 
  } else if (__unsigned_compare_ge_128 (CA4, CY)) {
523 
    Q++;
524 
    __sub_128_128 (CA4, CA4, CY);
525 
  }
526 
 
527 
  __add_128_64 (CQ, CQ, Q);
528 
 
529 
  pCQ->w[1] = CQ.w[1];
530 
  pCQ->w[0] = CQ.w[0];
531 
  pCA4->w[1] = CA4.w[1];
532 
  pCA4->w[0] = CA4.w[0];
533 
  return;
534 
 
535 
 
536 
 
537 
}
538 
 
539 
#endif
540 
#endif

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