gcc/libgcc2.c

   1 /* More subroutines needed by GCC output code on some machines.  */
   2 /* Compile this one with gcc.  */
   3 /* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   4    2000, 2001  Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 In addition to the permissions in the GNU General Public License, the
  14 Free Software Foundation gives you unlimited permission to link the
  15 compiled version of this file into combinations with other programs,
  16 and to distribute those combinations without any restriction coming
  17 from the use of this file.  (The General Public License restrictions
  18 do apply in other respects; for example, they cover modification of
  19 the file, and distribution when not linked into a combine
  20 executable.)
  21
  22 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  23 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  24 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  25 for more details.
  26
  27 You should have received a copy of the GNU General Public License
  28 along with GCC; see the file COPYING.  If not, write to the Free
  29 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  30 02111-1307, USA.  */
  31
  32 /* It is incorrect to include config.h here, because this file is being
  33    compiled for the target, and hence definitions concerning only the host
  34    do not apply.  */
  35
  36 #include "tconfig.h"
  37 #include "tsystem.h"
  38
  39 #include "machmode.h"
  40
  41 /* Don't use `fancy_abort' here even if config.h says to use it.  */
  42 #ifdef abort
  43 #undef abort
  44 #endif
  45
  46 #include "libgcc2.h"
  47 \f
  48 #if defined (L_negdi2) || defined (L_divdi3) || defined (L_moddi3)
  49 #if defined (L_divdi3) || defined (L_moddi3)
  50 static inline
  51 #endif
  52 DWtype
  53 __negdi2 (DWtype u)
  54 {
  55   DWunion w;
  56   DWunion uu;
  57
  58   uu.ll = u;
  59
  60   w.s.low = -uu.s.low;
  61   w.s.high = -uu.s.high - ((UWtype) w.s.low > 0);
  62
  63   return w.ll;
  64 }
  65 #endif
  66
  67 #ifdef L_addvsi3
  68 Wtype
  69 __addvsi3 (Wtype a, Wtype b)
  70 {
  71   Wtype w;
  72
  73   w = a + b;
  74
  75   if (b >= 0 ? w < a : w > a)
  76     abort ();
  77
  78   return w;
  79 }
  80 #endif
  81 \f
  82 #ifdef L_addvdi3
  83 DWtype
  84 __addvdi3 (DWtype a, DWtype b)
  85 {
  86   DWtype w;
  87
  88   w = a + b;
  89
  90   if (b >= 0 ? w < a : w > a)
  91     abort ();
  92
  93   return w;
  94 }
  95 #endif
  96 \f
  97 #ifdef L_subvsi3
  98 Wtype
  99 __subvsi3 (Wtype a, Wtype b)
 100 {
 101 #ifdef L_addvsi3
 102   return __addvsi3 (a, (-b));
 103 #else
 104   DWtype w;
 105
 106   w = a - b;
 107
 108   if (b >= 0 ? w > a : w < a)
 109     abort ();
 110
 111   return w;
 112 #endif
 113 }
 114 #endif
 115 \f
 116 #ifdef L_subvdi3
 117 DWtype
 118 __subvdi3 (DWtype a, DWtype b)
 119 {
 120 #ifdef L_addvdi3
 121   return (a, (-b));
 122 #else
 123   DWtype w;
 124
 125   w = a - b;
 126
 127   if (b >= 0 ? w > a : w < a)
 128     abort ();
 129
 130   return w;
 131 #endif
 132 }
 133 #endif
 134 \f
 135 #ifdef L_mulvsi3
 136 Wtype
 137 __mulvsi3 (Wtype a, Wtype b)
 138 {
 139   DWtype w;
 140
 141   w = a * b;
 142
 143   if (((a >= 0) == (b >= 0)) ? w < 0 : w > 0)
 144     abort ();
 145
 146   return w;
 147 }
 148 #endif
 149 \f
 150 #ifdef L_negvsi2
 151 Wtype
 152 __negvsi2 (Wtype a)
 153 {
 154    Wtype w;
 155
 156    w  = -a;
 157
 158   if (a >= 0 ? w > 0 : w < 0)
 159     abort ();
 160
 161    return w;
 162 }
 163 #endif
 164 \f
 165 #ifdef L_negvdi2
 166 DWtype
 167 __negvdi2 (DWtype a)
 168 {
 169    DWtype w;
 170
 171    w  = -a;
 172
 173   if (a >= 0 ? w > 0 : w < 0)
 174     abort ();
 175
 176    return w;
 177 }
 178 #endif
 179 \f
 180 #ifdef L_absvsi2
 181 Wtype
 182 __absvsi2 (Wtype a)
 183 {
 184    Wtype w = a;
 185
 186    if (a < 0)
 187 #ifdef L_negvsi2
 188      w = __negvsi2 (a);
 189 #else
 190      w = -a;
 191
 192    if (w < 0)
 193      abort ();
 194 #endif
 195
 196    return w;
 197 }
 198 #endif
 199 \f
 200 #ifdef L_absvdi2
 201 DWtype
 202 __absvdi2 (DWtype a)
 203 {
 204    DWtype w = a;
 205
 206    if (a < 0)
 207 #ifdef L_negvsi2
 208      w = __negvsi2 (a);
 209 #else
 210      w = -a;
 211
 212    if (w < 0)
 213      abort ();
 214 #endif
 215
 216    return w;
 217 }
 218 #endif
 219 \f
 220 #ifdef L_mulvdi3
 221 DWtype
 222 __mulvdi3 (DWtype u, DWtype v)
 223 {
 224    DWtype w;
 225
 226   w = u * v;
 227
 228   if (((u >= 0) == (v >= 0)) ? w < 0 : w > 0)
 229     abort ();
 230
 231   return w;
 232 }
 233 #endif
 234 \f
 235
 236 /* Unless shift functions are defined whith full ANSI prototypes,
 237    parameter b will be promoted to int if word_type is smaller than an int.  */
 238 #ifdef L_lshrdi3
 239 DWtype
 240 __lshrdi3 (DWtype u, word_type b)
 241 {
 242   DWunion w;
 243   word_type bm;
 244   DWunion uu;
 245
 246   if (b == 0)
 247     return u;
 248
 249   uu.ll = u;
 250
 251   bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
 252   if (bm <= 0)
 253     {
 254       w.s.high = 0;
 255       w.s.low = (UWtype) uu.s.high >> -bm;
 256     }
 257   else
 258     {
 259       UWtype carries = (UWtype) uu.s.high << bm;
 260
 261       w.s.high = (UWtype) uu.s.high >> b;
 262       w.s.low = ((UWtype) uu.s.low >> b) | carries;
 263     }
 264
 265   return w.ll;
 266 }
 267 #endif
 268
 269 #ifdef L_ashldi3
 270 DWtype
 271 __ashldi3 (DWtype u, word_type b)
 272 {
 273   DWunion w;
 274   word_type bm;
 275   DWunion uu;
 276
 277   if (b == 0)
 278     return u;
 279
 280   uu.ll = u;
 281
 282   bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
 283   if (bm <= 0)
 284     {
 285       w.s.low = 0;
 286       w.s.high = (UWtype) uu.s.low << -bm;
 287     }
 288   else
 289     {
 290       UWtype carries = (UWtype) uu.s.low >> bm;
 291
 292       w.s.low = (UWtype) uu.s.low << b;
 293       w.s.high = ((UWtype) uu.s.high << b) | carries;
 294     }
 295
 296   return w.ll;
 297 }
 298 #endif
 299
 300 #ifdef L_ashrdi3
 301 DWtype
 302 __ashrdi3 (DWtype u, word_type b)
 303 {
 304   DWunion w;
 305   word_type bm;
 306   DWunion uu;
 307
 308   if (b == 0)
 309     return u;
 310
 311   uu.ll = u;
 312
 313   bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
 314   if (bm <= 0)
 315     {
 316       /* w.s.high = 1..1 or 0..0 */
 317       w.s.high = uu.s.high >> (sizeof (Wtype) * BITS_PER_UNIT - 1);
 318       w.s.low = uu.s.high >> -bm;
 319     }
 320   else
 321     {
 322       UWtype carries = (UWtype) uu.s.high << bm;
 323
 324       w.s.high = uu.s.high >> b;
 325       w.s.low = ((UWtype) uu.s.low >> b) | carries;
 326     }
 327
 328   return w.ll;
 329 }
 330 #endif
 331 \f
 332 #ifdef L_ffsdi2
 333 DWtype
 334 __ffsdi2 (DWtype u)
 335 {
 336   DWunion uu;
 337   UWtype word, count, add;
 338
 339   uu.ll = u;
 340   if (uu.s.low != 0)
 341     word = uu.s.low, add = 0;
 342   else if (uu.s.high != 0)
 343     word = uu.s.high, add = BITS_PER_UNIT * sizeof (Wtype);
 344   else
 345     return 0;
 346
 347   count_trailing_zeros (count, word);
 348   return count + add + 1;
 349 }
 350 #endif
 351 \f
 352 #ifdef L_muldi3
 353 DWtype
 354 __muldi3 (DWtype u, DWtype v)
 355 {
 356   DWunion w;
 357   DWunion uu, vv;
 358
 359   uu.ll = u,
 360   vv.ll = v;
 361
 362   w.ll = __umulsidi3 (uu.s.low, vv.s.low);
 363   w.s.high += ((UWtype) uu.s.low * (UWtype) vv.s.high
 364                + (UWtype) uu.s.high * (UWtype) vv.s.low);
 365
 366   return w.ll;
 367 }
 368 #endif
 369 \f
 370 #ifdef L_udiv_w_sdiv
 371 #if defined (sdiv_qrnnd)
 372 UWtype
 373 __udiv_w_sdiv (UWtype *rp, UWtype a1, UWtype a0, UWtype d)
 374 {
 375   UWtype q, r;
 376   UWtype c0, c1, b1;
 377
 378   if ((Wtype) d >= 0)
 379     {
 380       if (a1 < d - a1 - (a0 >> (W_TYPE_SIZE - 1)))
 381         {
 382           /* dividend, divisor, and quotient are nonnegative */
 383           sdiv_qrnnd (q, r, a1, a0, d);
 384         }
 385       else
 386         {
 387           /* Compute c1*2^32 + c0 = a1*2^32 + a0 - 2^31*d */
 388           sub_ddmmss (c1, c0, a1, a0, d >> 1, d << (W_TYPE_SIZE - 1));
 389           /* Divide (c1*2^32 + c0) by d */
 390           sdiv_qrnnd (q, r, c1, c0, d);
 391           /* Add 2^31 to quotient */
 392           q += (UWtype) 1 << (W_TYPE_SIZE - 1);
 393         }
 394     }
 395   else
 396     {
 397       b1 = d >> 1;                      /* d/2, between 2^30 and 2^31 - 1 */
 398       c1 = a1 >> 1;                     /* A/2 */
 399       c0 = (a1 << (W_TYPE_SIZE - 1)) + (a0 >> 1);
 400
 401       if (a1 < b1)                      /* A < 2^32*b1, so A/2 < 2^31*b1 */
 402         {
 403           sdiv_qrnnd (q, r, c1, c0, b1); /* (A/2) / (d/2) */
 404
 405           r = 2*r + (a0 & 1);           /* Remainder from A/(2*b1) */
 406           if ((d & 1) != 0)
 407             {
 408               if (r >= q)
 409                 r = r - q;
 410               else if (q - r <= d)
 411                 {
 412                   r = r - q + d;
 413                   q--;
 414                 }
 415               else
 416                 {
 417                   r = r - q + 2*d;
 418                   q -= 2;
 419                 }
 420             }
 421         }
 422       else if (c1 < b1)                 /* So 2^31 <= (A/2)/b1 < 2^32 */
 423         {
 424           c1 = (b1 - 1) - c1;
 425           c0 = ~c0;                     /* logical NOT */
 426
 427           sdiv_qrnnd (q, r, c1, c0, b1); /* (A/2) / (d/2) */
 428
 429           q = ~q;                       /* (A/2)/b1 */
 430           r = (b1 - 1) - r;
 431
 432           r = 2*r + (a0 & 1);           /* A/(2*b1) */
 433
 434           if ((d & 1) != 0)
 435             {
 436               if (r >= q)
 437                 r = r - q;
 438               else if (q - r <= d)
 439                 {
 440                   r = r - q + d;
 441                   q--;
 442                 }
 443               else
 444                 {
 445                   r = r - q + 2*d;
 446                   q -= 2;
 447                 }
 448             }
 449         }
 450       else                              /* Implies c1 = b1 */
 451         {                               /* Hence a1 = d - 1 = 2*b1 - 1 */
 452           if (a0 >= -d)
 453             {
 454               q = -1;
 455               r = a0 + d;
 456             }
 457           else
 458             {
 459               q = -2;
 460               r = a0 + 2*d;
 461             }
 462         }
 463     }
 464
 465   *rp = r;
 466   return q;
 467 }
 468 #else
 469 /* If sdiv_qrnnd doesn't exist, define dummy __udiv_w_sdiv.  */
 470 UWtype
 471 __udiv_w_sdiv (UWtype *rp __attribute__ ((__unused__)),
 472                UWtype a1 __attribute__ ((__unused__)),
 473                UWtype a0 __attribute__ ((__unused__)),
 474                UWtype d __attribute__ ((__unused__)))
 475 {
 476   return 0;
 477 }
 478 #endif
 479 #endif
 480 \f
 481 #if (defined (L_udivdi3) || defined (L_divdi3) || \
 482      defined (L_umoddi3) || defined (L_moddi3))
 483 #define L_udivmoddi4
 484 #endif
 485
 486 #ifdef L_clz
 487 const UQItype __clz_tab[] =
 488 {
 489   0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
 490   6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
 491   7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
 492   7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
 493   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
 494   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
 495   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
 496   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
 497 };
 498 #endif
 499
 500 #ifdef L_udivmoddi4
 501
 502 #if (defined (L_udivdi3) || defined (L_divdi3) || \
 503      defined (L_umoddi3) || defined (L_moddi3))
 504 static inline
 505 #endif
 506 UDWtype
 507 __udivmoddi4 (UDWtype n, UDWtype d, UDWtype *rp)
 508 {
 509   DWunion ww;
 510   DWunion nn, dd;
 511   DWunion rr;
 512   UWtype d0, d1, n0, n1, n2;
 513   UWtype q0, q1;
 514   UWtype b, bm;
 515
 516   nn.ll = n;
 517   dd.ll = d;
 518
 519   d0 = dd.s.low;
 520   d1 = dd.s.high;
 521   n0 = nn.s.low;
 522   n1 = nn.s.high;
 523
 524 #if !UDIV_NEEDS_NORMALIZATION
 525   if (d1 == 0)
 526     {
 527       if (d0 > n1)
 528         {
 529           /* 0q = nn / 0D */
 530
 531           udiv_qrnnd (q0, n0, n1, n0, d0);
 532           q1 = 0;
 533
 534           /* Remainder in n0.  */
 535         }
 536       else
 537         {
 538           /* qq = NN / 0d */
 539
 540           if (d0 == 0)
 541             d0 = 1 / d0;        /* Divide intentionally by zero.  */
 542
 543           udiv_qrnnd (q1, n1, 0, n1, d0);
 544           udiv_qrnnd (q0, n0, n1, n0, d0);
 545
 546           /* Remainder in n0.  */
 547         }
 548
 549       if (rp != 0)
 550         {
 551           rr.s.low = n0;
 552           rr.s.high = 0;
 553           *rp = rr.ll;
 554         }
 555     }
 556
 557 #else /* UDIV_NEEDS_NORMALIZATION */
 558
 559   if (d1 == 0)
 560     {
 561       if (d0 > n1)
 562         {
 563           /* 0q = nn / 0D */
 564
 565           count_leading_zeros (bm, d0);
 566
 567           if (bm != 0)
 568             {
 569               /* Normalize, i.e. make the most significant bit of the
 570                  denominator set.  */
 571
 572               d0 = d0 << bm;
 573               n1 = (n1 << bm) | (n0 >> (W_TYPE_SIZE - bm));
 574               n0 = n0 << bm;
 575             }
 576
 577           udiv_qrnnd (q0, n0, n1, n0, d0);
 578           q1 = 0;
 579
 580           /* Remainder in n0 >> bm.  */
 581         }
 582       else
 583         {
 584           /* qq = NN / 0d */
 585
 586           if (d0 == 0)
 587             d0 = 1 / d0;        /* Divide intentionally by zero.  */
 588
 589           count_leading_zeros (bm, d0);
 590
 591           if (bm == 0)
 592             {
 593               /* From (n1 >= d0) /\ (the most significant bit of d0 is set),
 594                  conclude (the most significant bit of n1 is set) /\ (the
 595                  leading quotient digit q1 = 1).
 596
 597                  This special case is necessary, not an optimization.
 598                  (Shifts counts of W_TYPE_SIZE are undefined.)  */
 599
 600               n1 -= d0;
 601               q1 = 1;
 602             }
 603           else
 604             {
 605               /* Normalize.  */
 606
 607               b = W_TYPE_SIZE - bm;
 608
 609               d0 = d0 << bm;
 610               n2 = n1 >> b;
 611               n1 = (n1 << bm) | (n0 >> b);
 612               n0 = n0 << bm;
 613
 614               udiv_qrnnd (q1, n1, n2, n1, d0);
 615             }
 616
 617           /* n1 != d0...  */
 618
 619           udiv_qrnnd (q0, n0, n1, n0, d0);
 620
 621           /* Remainder in n0 >> bm.  */
 622         }
 623
 624       if (rp != 0)
 625         {
 626           rr.s.low = n0 >> bm;
 627           rr.s.high = 0;
 628           *rp = rr.ll;
 629         }
 630     }
 631 #endif /* UDIV_NEEDS_NORMALIZATION */
 632
 633   else
 634     {
 635       if (d1 > n1)
 636         {
 637           /* 00 = nn / DD */
 638
 639           q0 = 0;
 640           q1 = 0;
 641
 642           /* Remainder in n1n0.  */
 643           if (rp != 0)
 644             {
 645               rr.s.low = n0;
 646               rr.s.high = n1;
 647               *rp = rr.ll;
 648             }
 649         }
 650       else
 651         {
 652           /* 0q = NN / dd */
 653
 654           count_leading_zeros (bm, d1);
 655           if (bm == 0)
 656             {
 657               /* From (n1 >= d1) /\ (the most significant bit of d1 is set),
 658                  conclude (the most significant bit of n1 is set) /\ (the
 659                  quotient digit q0 = 0 or 1).
 660
 661                  This special case is necessary, not an optimization.  */
 662
 663               /* The condition on the next line takes advantage of that
 664                  n1 >= d1 (true due to program flow).  */
 665               if (n1 > d1 || n0 >= d0)
 666                 {
 667                   q0 = 1;
 668                   sub_ddmmss (n1, n0, n1, n0, d1, d0);
 669                 }
 670               else
 671                 q0 = 0;
 672
 673               q1 = 0;
 674
 675               if (rp != 0)
 676                 {
 677                   rr.s.low = n0;
 678                   rr.s.high = n1;
 679                   *rp = rr.ll;
 680                 }
 681             }
 682           else
 683             {
 684               UWtype m1, m0;
 685               /* Normalize.  */
 686
 687               b = W_TYPE_SIZE - bm;
 688
 689               d1 = (d1 << bm) | (d0 >> b);
 690               d0 = d0 << bm;
 691               n2 = n1 >> b;
 692               n1 = (n1 << bm) | (n0 >> b);
 693               n0 = n0 << bm;
 694
 695               udiv_qrnnd (q0, n1, n2, n1, d1);
 696               umul_ppmm (m1, m0, q0, d0);
 697
 698               if (m1 > n1 || (m1 == n1 && m0 > n0))
 699                 {
 700                   q0--;
 701                   sub_ddmmss (m1, m0, m1, m0, d1, d0);
 702                 }
 703
 704               q1 = 0;
 705
 706               /* Remainder in (n1n0 - m1m0) >> bm.  */
 707               if (rp != 0)
 708                 {
 709                   sub_ddmmss (n1, n0, n1, n0, m1, m0);
 710                   rr.s.low = (n1 << b) | (n0 >> bm);
 711                   rr.s.high = n1 >> bm;
 712                   *rp = rr.ll;
 713                 }
 714             }
 715         }
 716     }
 717
 718   ww.s.low = q0;
 719   ww.s.high = q1;
 720   return ww.ll;
 721 }
 722 #endif
 723
 724 #ifdef L_divdi3
 725 DWtype
 726 __divdi3 (DWtype u, DWtype v)
 727 {
 728   word_type c = 0;
 729   DWunion uu, vv;
 730   DWtype w;
 731
 732   uu.ll = u;
 733   vv.ll = v;
 734
 735   if (uu.s.high < 0)
 736     c = ~c,
 737     uu.ll = __negdi2 (uu.ll);
 738   if (vv.s.high < 0)
 739     c = ~c,
 740     vv.ll = __negdi2 (vv.ll);
 741
 742   w = __udivmoddi4 (uu.ll, vv.ll, (UDWtype *) 0);
 743   if (c)
 744     w = __negdi2 (w);
 745
 746   return w;
 747 }
 748 #endif
 749
 750 #ifdef L_moddi3
 751 DWtype
 752 __moddi3 (DWtype u, DWtype v)
 753 {
 754   word_type c = 0;
 755   DWunion uu, vv;
 756   DWtype w;
 757
 758   uu.ll = u;
 759   vv.ll = v;
 760
 761   if (uu.s.high < 0)
 762     c = ~c,
 763     uu.ll = __negdi2 (uu.ll);
 764   if (vv.s.high < 0)
 765     vv.ll = __negdi2 (vv.ll);
 766
 767   (void) __udivmoddi4 (uu.ll, vv.ll, &w);
 768   if (c)
 769     w = __negdi2 (w);
 770
 771   return w;
 772 }
 773 #endif
 774
 775 #ifdef L_umoddi3
 776 UDWtype
 777 __umoddi3 (UDWtype u, UDWtype v)
 778 {
 779   UDWtype w;
 780
 781   (void) __udivmoddi4 (u, v, &w);
 782
 783   return w;
 784 }
 785 #endif
 786
 787 #ifdef L_udivdi3
 788 UDWtype
 789 __udivdi3 (UDWtype n, UDWtype d)
 790 {
 791   return __udivmoddi4 (n, d, (UDWtype *) 0);
 792 }
 793 #endif
 794 \f
 795 #ifdef L_cmpdi2
 796 word_type
 797 __cmpdi2 (DWtype a, DWtype b)
 798 {
 799   DWunion au, bu;
 800
 801   au.ll = a, bu.ll = b;
 802
 803   if (au.s.high < bu.s.high)
 804     return 0;
 805   else if (au.s.high > bu.s.high)
 806     return 2;
 807   if ((UWtype) au.s.low < (UWtype) bu.s.low)
 808     return 0;
 809   else if ((UWtype) au.s.low > (UWtype) bu.s.low)
 810     return 2;
 811   return 1;
 812 }
 813 #endif
 814
 815 #ifdef L_ucmpdi2
 816 word_type
 817 __ucmpdi2 (DWtype a, DWtype b)
 818 {
 819   DWunion au, bu;
 820
 821   au.ll = a, bu.ll = b;
 822
 823   if ((UWtype) au.s.high < (UWtype) bu.s.high)
 824     return 0;
 825   else if ((UWtype) au.s.high > (UWtype) bu.s.high)
 826     return 2;
 827   if ((UWtype) au.s.low < (UWtype) bu.s.low)
 828     return 0;
 829   else if ((UWtype) au.s.low > (UWtype) bu.s.low)
 830     return 2;
 831   return 1;
 832 }
 833 #endif
 834 \f
 835 #if defined(L_fixunstfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
 836 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
 837 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
 838
 839 DWtype
 840 __fixunstfDI (TFtype a)
 841 {
 842   TFtype b;
 843   UDWtype v;
 844
 845   if (a < 0)
 846     return 0;
 847
 848   /* Compute high word of result, as a flonum.  */
 849   b = (a / HIGH_WORD_COEFF);
 850   /* Convert that to fixed (but not to DWtype!),
 851      and shift it into the high word.  */
 852   v = (UWtype) b;
 853   v <<= WORD_SIZE;
 854   /* Remove high part from the TFtype, leaving the low part as flonum.  */
 855   a -= (TFtype)v;
 856   /* Convert that to fixed (but not to DWtype!) and add it in.
 857      Sometimes A comes out negative.  This is significant, since
 858      A has more bits than a long int does.  */
 859   if (a < 0)
 860     v -= (UWtype) (- a);
 861   else
 862     v += (UWtype) a;
 863   return v;
 864 }
 865 #endif
 866
 867 #if defined(L_fixtfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
 868 DWtype
 869 __fixtfdi (TFtype a)
 870 {
 871   if (a < 0)
 872     return - __fixunstfDI (-a);
 873   return __fixunstfDI (a);
 874 }
 875 #endif
 876
 877 #if defined(L_fixunsxfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
 878 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
 879 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
 880
 881 DWtype
 882 __fixunsxfDI (XFtype a)
 883 {
 884   XFtype b;
 885   UDWtype v;
 886
 887   if (a < 0)
 888     return 0;
 889
 890   /* Compute high word of result, as a flonum.  */
 891   b = (a / HIGH_WORD_COEFF);
 892   /* Convert that to fixed (but not to DWtype!),
 893      and shift it into the high word.  */
 894   v = (UWtype) b;
 895   v <<= WORD_SIZE;
 896   /* Remove high part from the XFtype, leaving the low part as flonum.  */
 897   a -= (XFtype)v;
 898   /* Convert that to fixed (but not to DWtype!) and add it in.
 899      Sometimes A comes out negative.  This is significant, since
 900      A has more bits than a long int does.  */
 901   if (a < 0)
 902     v -= (UWtype) (- a);
 903   else
 904     v += (UWtype) a;
 905   return v;
 906 }
 907 #endif
 908
 909 #if defined(L_fixxfdi) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
 910 DWtype
 911 __fixxfdi (XFtype a)
 912 {
 913   if (a < 0)
 914     return - __fixunsxfDI (-a);
 915   return __fixunsxfDI (a);
 916 }
 917 #endif
 918
 919 #ifdef L_fixunsdfdi
 920 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
 921 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
 922
 923 DWtype
 924 __fixunsdfDI (DFtype a)
 925 {
 926   DFtype b;
 927   UDWtype v;
 928
 929   if (a < 0)
 930     return 0;
 931
 932   /* Compute high word of result, as a flonum.  */
 933   b = (a / HIGH_WORD_COEFF);
 934   /* Convert that to fixed (but not to DWtype!),
 935      and shift it into the high word.  */
 936   v = (UWtype) b;
 937   v <<= WORD_SIZE;
 938   /* Remove high part from the DFtype, leaving the low part as flonum.  */
 939   a -= (DFtype)v;
 940   /* Convert that to fixed (but not to DWtype!) and add it in.
 941      Sometimes A comes out negative.  This is significant, since
 942      A has more bits than a long int does.  */
 943   if (a < 0)
 944     v -= (UWtype) (- a);
 945   else
 946     v += (UWtype) a;
 947   return v;
 948 }
 949 #endif
 950
 951 #ifdef L_fixdfdi
 952 DWtype
 953 __fixdfdi (DFtype a)
 954 {
 955   if (a < 0)
 956     return - __fixunsdfDI (-a);
 957   return __fixunsdfDI (a);
 958 }
 959 #endif
 960
 961 #ifdef L_fixunssfdi
 962 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
 963 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
 964
 965 DWtype
 966 __fixunssfDI (SFtype original_a)
 967 {
 968   /* Convert the SFtype to a DFtype, because that is surely not going
 969      to lose any bits.  Some day someone else can write a faster version
 970      that avoids converting to DFtype, and verify it really works right.  */
 971   DFtype a = original_a;
 972   DFtype b;
 973   UDWtype v;
 974
 975   if (a < 0)
 976     return 0;
 977
 978   /* Compute high word of result, as a flonum.  */
 979   b = (a / HIGH_WORD_COEFF);
 980   /* Convert that to fixed (but not to DWtype!),
 981      and shift it into the high word.  */
 982   v = (UWtype) b;
 983   v <<= WORD_SIZE;
 984   /* Remove high part from the DFtype, leaving the low part as flonum.  */
 985   a -= (DFtype) v;
 986   /* Convert that to fixed (but not to DWtype!) and add it in.
 987      Sometimes A comes out negative.  This is significant, since
 988      A has more bits than a long int does.  */
 989   if (a < 0)
 990     v -= (UWtype) (- a);
 991   else
 992     v += (UWtype) a;
 993   return v;
 994 }
 995 #endif
 996
 997 #ifdef L_fixsfdi
 998 DWtype
 999 __fixsfdi (SFtype a)
1000 {
1001   if (a < 0)
1002     return - __fixunssfDI (-a);
1003   return __fixunssfDI (a);
1004 }
1005 #endif
1006
1007 #if defined(L_floatdixf) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96)
1008 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1009 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1010 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1011
1012 XFtype
1013 __floatdixf (DWtype u)
1014 {
1015   XFtype d;
1016
1017   d = (Wtype) (u >> WORD_SIZE);
1018   d *= HIGH_HALFWORD_COEFF;
1019   d *= HIGH_HALFWORD_COEFF;
1020   d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
1021
1022   return d;
1023 }
1024 #endif
1025
1026 #if defined(L_floatditf) && (LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128)
1027 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1028 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1029 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1030
1031 TFtype
1032 __floatditf (DWtype u)
1033 {
1034   TFtype d;
1035
1036   d = (Wtype) (u >> WORD_SIZE);
1037   d *= HIGH_HALFWORD_COEFF;
1038   d *= HIGH_HALFWORD_COEFF;
1039   d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
1040
1041   return d;
1042 }
1043 #endif
1044
1045 #ifdef L_floatdidf
1046 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1047 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1048 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1049
1050 DFtype
1051 __floatdidf (DWtype u)
1052 {
1053   DFtype d;
1054
1055   d = (Wtype) (u >> WORD_SIZE);
1056   d *= HIGH_HALFWORD_COEFF;
1057   d *= HIGH_HALFWORD_COEFF;
1058   d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
1059
1060   return d;
1061 }
1062 #endif
1063
1064 #ifdef L_floatdisf
1065 #define WORD_SIZE (sizeof (Wtype) * BITS_PER_UNIT)
1066 #define HIGH_HALFWORD_COEFF (((UDWtype) 1) << (WORD_SIZE / 2))
1067 #define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
1068 #define DI_SIZE (sizeof (DWtype) * BITS_PER_UNIT)
1069
1070 /* Define codes for all the float formats that we know of.  Note
1071    that this is copied from real.h.  */
1072
1073 #define UNKNOWN_FLOAT_FORMAT 0
1074 #define IEEE_FLOAT_FORMAT 1
1075 #define VAX_FLOAT_FORMAT 2
1076 #define IBM_FLOAT_FORMAT 3
1077
1078 /* Default to IEEE float if not specified.  Nearly all machines use it.  */
1079 #ifndef HOST_FLOAT_FORMAT
1080 #define HOST_FLOAT_FORMAT       IEEE_FLOAT_FORMAT
1081 #endif
1082
1083 #if HOST_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
1084 #define DF_SIZE 53
1085 #define SF_SIZE 24
1086 #endif
1087
1088 #if HOST_FLOAT_FORMAT == IBM_FLOAT_FORMAT
1089 #define DF_SIZE 56
1090 #define SF_SIZE 24
1091 #endif
1092
1093 #if HOST_FLOAT_FORMAT == VAX_FLOAT_FORMAT
1094 #define DF_SIZE 56
1095 #define SF_SIZE 24
1096 #endif
1097
1098 SFtype
1099 __floatdisf (DWtype u)
1100 {
1101   /* Do the calculation in DFmode
1102      so that we don't lose any of the precision of the high word
1103      while multiplying it.  */
1104   DFtype f;
1105
1106   /* Protect against double-rounding error.
1107      Represent any low-order bits, that might be truncated in DFmode,
1108      by a bit that won't be lost.  The bit can go in anywhere below the
1109      rounding position of the SFmode.  A fixed mask and bit position
1110      handles all usual configurations.  It doesn't handle the case
1111      of 128-bit DImode, however.  */
1112   if (DF_SIZE < DI_SIZE
1113       && DF_SIZE > (DI_SIZE - DF_SIZE + SF_SIZE))
1114     {
1115 #define REP_BIT ((UDWtype) 1 << (DI_SIZE - DF_SIZE))
1116       if (! (- ((DWtype) 1 << DF_SIZE) < u
1117              && u < ((DWtype) 1 << DF_SIZE)))
1118         {
1119           if ((UDWtype) u & (REP_BIT - 1))
1120             u |= REP_BIT;
1121         }
1122     }
1123   f = (Wtype) (u >> WORD_SIZE);
1124   f *= HIGH_HALFWORD_COEFF;
1125   f *= HIGH_HALFWORD_COEFF;
1126   f += (UWtype) (u & (HIGH_WORD_COEFF - 1));
1127
1128   return (SFtype) f;
1129 }
1130 #endif
1131
1132 #if defined(L_fixunsxfsi) && LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 96
1133 /* Reenable the normal types, in case limits.h needs them.  */
1134 #undef char
1135 #undef short
1136 #undef int
1137 #undef long
1138 #undef unsigned
1139 #undef float
1140 #undef double
1141 #undef MIN
1142 #undef MAX
1143 #include <limits.h>
1144
1145 UWtype
1146 __fixunsxfSI (XFtype a)
1147 {
1148   if (a >= - (DFtype) Wtype_MIN)
1149     return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
1150   return (Wtype) a;
1151 }
1152 #endif
1153
1154 #ifdef L_fixunsdfsi
1155 /* Reenable the normal types, in case limits.h needs them.  */
1156 #undef char
1157 #undef short
1158 #undef int
1159 #undef long
1160 #undef unsigned
1161 #undef float
1162 #undef double
1163 #undef MIN
1164 #undef MAX
1165 #include <limits.h>
1166
1167 UWtype
1168 __fixunsdfSI (DFtype a)
1169 {
1170   if (a >= - (DFtype) Wtype_MIN)
1171     return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
1172   return (Wtype) a;
1173 }
1174 #endif
1175
1176 #ifdef L_fixunssfsi
1177 /* Reenable the normal types, in case limits.h needs them.  */
1178 #undef char
1179 #undef short
1180 #undef int
1181 #undef long
1182 #undef unsigned
1183 #undef float
1184 #undef double
1185 #undef MIN
1186 #undef MAX
1187 #include <limits.h>
1188
1189 UWtype
1190 __fixunssfSI (SFtype a)
1191 {
1192   if (a >= - (SFtype) Wtype_MIN)
1193     return (Wtype) (a + Wtype_MIN) - Wtype_MIN;
1194   return (Wtype) a;
1195 }
1196 #endif
1197 \f
1198 /* From here on down, the routines use normal data types.  */
1199
1200 #define SItype bogus_type
1201 #define USItype bogus_type
1202 #define DItype bogus_type
1203 #define UDItype bogus_type
1204 #define SFtype bogus_type
1205 #define DFtype bogus_type
1206 #undef Wtype
1207 #undef UWtype
1208 #undef HWtype
1209 #undef UHWtype
1210 #undef DWtype
1211 #undef UDWtype
1212
1213 #undef char
1214 #undef short
1215 #undef int
1216 #undef long
1217 #undef unsigned
1218 #undef float
1219 #undef double
1220 \f
1221 #ifdef L__gcc_bcmp
1222
1223 /* Like bcmp except the sign is meaningful.
1224    Result is negative if S1 is less than S2,
1225    positive if S1 is greater, 0 if S1 and S2 are equal.  */
1226
1227 int
1228 __gcc_bcmp (const unsigned char *s1, const unsigned char *s2, size_t size)
1229 {
1230   while (size > 0)
1231     {
1232       unsigned char c1 = *s1++, c2 = *s2++;
1233       if (c1 != c2)
1234         return c1 - c2;
1235       size--;
1236     }
1237   return 0;
1238 }
1239
1240 #endif
1241 \f
1242 /* __eprintf used to be used by GCC's private version of <assert.h>.
1243    We no longer provide that header, but this routine remains in libgcc.a
1244    for binary backward compatibility.  Note that it is not included in
1245    the shared version of libgcc.  */
1246 #ifdef L_eprintf
1247 #ifndef inhibit_libc
1248
1249 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch.  */
1250 #include <stdio.h>
1251
1252 void
1253 __eprintf (const char *string, const char *expression,
1254            unsigned int line, const char *filename)
1255 {
1256   fprintf (stderr, string, expression, line, filename);
1257   fflush (stderr);
1258   abort ();
1259 }
1260
1261 #endif
1262 #endif
1263
1264 #ifdef L_bb
1265
1266 #if LONG_TYPE_SIZE == GCOV_TYPE_SIZE
1267 typedef long gcov_type;
1268 #else
1269 typedef long long gcov_type;
1270 #endif
1271
1272
1273 /* Structure emitted by -a  */
1274 struct bb
1275 {
1276   long zero_word;
1277   const char *filename;
1278   gcov_type *counts;
1279   long ncounts;
1280   struct bb *next;
1281   const unsigned long *addresses;
1282
1283   /* Older GCC's did not emit these fields.  */
1284   long nwords;
1285   const char **functions;
1286   const long *line_nums;
1287   const char **filenames;
1288   char *flags;
1289 };
1290
1291 #ifdef BLOCK_PROFILER_CODE
1292 BLOCK_PROFILER_CODE
1293 #else
1294 #ifndef inhibit_libc
1295
1296 /* Simple minded basic block profiling output dumper for
1297    systems that don't provide tcov support.  At present,
1298    it requires atexit and stdio.  */
1299
1300 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch.  */
1301 #include <stdio.h>
1302
1303 #include "gbl-ctors.h"
1304 #include "gcov-io.h"
1305 #include <string.h>
1306 #ifdef TARGET_HAS_F_SETLKW
1307 #include <fcntl.h>
1308 #include <errno.h>
1309 #endif
1310
1311 static struct bb *bb_head;
1312
1313 void
1314 __bb_exit_func (void)
1315 {
1316   FILE *da_file;
1317   int i;
1318   struct bb *ptr;
1319
1320   if (bb_head == 0)
1321     return;
1322
1323   i = strlen (bb_head->filename) - 3;
1324
1325
1326   for (ptr = bb_head; ptr != (struct bb *) 0; ptr = ptr->next)
1327     {
1328       int firstchar;
1329
1330       /* Make sure the output file exists -
1331          but don't clobber exiting data.  */
1332       if ((da_file = fopen (ptr->filename, "a")) != 0)
1333         fclose (da_file);
1334
1335       /* Need to re-open in order to be able to write from the start.  */
1336       da_file = fopen (ptr->filename, "r+b");
1337       /* Some old systems might not allow the 'b' mode modifier.
1338          Therefore, try to open without it.  This can lead to a race
1339          condition so that when you delete and re-create the file, the
1340          file might be opened in text mode, but then, you shouldn't
1341          delete the file in the first place.  */
1342       if (da_file == 0)
1343         da_file = fopen (ptr->filename, "r+");
1344       if (da_file == 0)
1345         {
1346           fprintf (stderr, "arc profiling: Can't open output file %s.\n",
1347                    ptr->filename);
1348           continue;
1349         }
1350
1351       /* After a fork, another process might try to read and/or write
1352          the same file simultanously.  So if we can, lock the file to
1353          avoid race conditions.  */
1354 #if defined (TARGET_HAS_F_SETLKW)
1355       {
1356         struct flock s_flock;
1357
1358         s_flock.l_type = F_WRLCK;
1359         s_flock.l_whence = SEEK_SET;
1360         s_flock.l_start = 0;
1361         s_flock.l_len = 1;
1362         s_flock.l_pid = getpid ();
1363
1364         while (fcntl (fileno (da_file), F_SETLKW, &s_flock)
1365                && errno == EINTR);
1366       }
1367 #endif
1368
1369       /* If the file is not empty, and the number of counts in it is the
1370          same, then merge them in.  */
1371       firstchar = fgetc (da_file);
1372       if (firstchar == EOF)
1373         {
1374           if (ferror (da_file))
1375             {
1376               fprintf (stderr, "arc profiling: Can't read output file ");
1377               perror (ptr->filename);
1378             }
1379         }
1380       else
1381         {
1382           long n_counts = 0;
1383
1384           if (ungetc (firstchar, da_file) == EOF)
1385             rewind (da_file);
1386           if (__read_long (&n_counts, da_file, 8) != 0)
1387             {
1388               fprintf (stderr, "arc profiling: Can't read output file %s.\n",
1389                        ptr->filename);
1390               continue;
1391             }
1392
1393           if (n_counts == ptr->ncounts)
1394             {
1395               int i;
1396
1397               for (i = 0; i < n_counts; i++)
1398                 {
1399                   gcov_type v = 0;
1400
1401                   if (__read_gcov_type (&v, da_file, 8) != 0)
1402                     {
1403                       fprintf (stderr,
1404                                "arc profiling: Can't read output file %s.\n",
1405                                ptr->filename);
1406                       break;
1407                     }
1408                   ptr->counts[i] += v;
1409                 }
1410             }
1411
1412         }
1413
1414       rewind (da_file);
1415
1416       /* ??? Should first write a header to the file.  Preferably, a 4 byte
1417          magic number, 4 bytes containing the time the program was
1418          compiled, 4 bytes containing the last modification time of the
1419          source file, and 4 bytes indicating the compiler options used.
1420
1421          That way we can easily verify that the proper source/executable/
1422          data file combination is being used from gcov.  */
1423
1424       if (__write_gcov_type (ptr->ncounts, da_file, 8) != 0)
1425         {
1426
1427           fprintf (stderr, "arc profiling: Error writing output file %s.\n",
1428                    ptr->filename);
1429         }
1430       else
1431         {
1432           int j;
1433           gcov_type *count_ptr = ptr->counts;
1434           int ret = 0;
1435           for (j = ptr->ncounts; j > 0; j--)
1436             {
1437               if (__write_gcov_type (*count_ptr, da_file, 8) != 0)
1438                 {
1439                   ret = 1;
1440                   break;
1441                 }
1442               count_ptr++;
1443             }
1444           if (ret)
1445             fprintf (stderr, "arc profiling: Error writing output file %s.\n",
1446                      ptr->filename);
1447         }
1448
1449       if (fclose (da_file) == EOF)
1450         fprintf (stderr, "arc profiling: Error closing output file %s.\n",
1451                  ptr->filename);
1452     }
1453
1454   return;
1455 }
1456
1457 void
1458 __bb_init_func (struct bb *blocks)
1459 {
1460   /* User is supposed to check whether the first word is non-0,
1461      but just in case....  */
1462
1463   if (blocks->zero_word)
1464     return;
1465
1466   /* Initialize destructor.  */
1467   if (!bb_head)
1468     atexit (__bb_exit_func);
1469
1470   /* Set up linked list.  */
1471   blocks->zero_word = 1;
1472   blocks->next = bb_head;
1473   bb_head = blocks;
1474 }
1475
1476 /* Called before fork or exec - write out profile information gathered so
1477    far and reset it to zero.  This avoids duplication or loss of the
1478    profile information gathered so far.  */
1479 void
1480 __bb_fork_func (void)
1481 {
1482   struct bb *ptr;
1483
1484   __bb_exit_func ();
1485   for (ptr = bb_head; ptr != (struct bb *) 0; ptr = ptr->next)
1486     {
1487       long i;
1488       for (i = ptr->ncounts - 1; i >= 0; i--)
1489         ptr->counts[i] = 0;
1490     }
1491 }
1492
1493 #endif /* not inhibit_libc */
1494 #endif /* not BLOCK_PROFILER_CODE */
1495 #endif /* L_bb */
1496 \f
1497 #ifdef L_clear_cache
1498 /* Clear part of an instruction cache.  */
1499
1500 #define INSN_CACHE_PLANE_SIZE (INSN_CACHE_SIZE / INSN_CACHE_DEPTH)
1501
1502 void
1503 __clear_cache (char *beg __attribute__((__unused__)),
1504                char *end __attribute__((__unused__)))
1505 {
1506 #ifdef CLEAR_INSN_CACHE
1507   CLEAR_INSN_CACHE (beg, end);
1508 #else
1509 #ifdef INSN_CACHE_SIZE
1510   static char array[INSN_CACHE_SIZE + INSN_CACHE_PLANE_SIZE + INSN_CACHE_LINE_WIDTH];
1511   static int initialized;
1512   int offset;
1513   void *start_addr
1514   void *end_addr;
1515   typedef (*function_ptr) (void);
1516
1517 #if (INSN_CACHE_SIZE / INSN_CACHE_LINE_WIDTH) < 16
1518   /* It's cheaper to clear the whole cache.
1519      Put in a series of jump instructions so that calling the beginning
1520      of the cache will clear the whole thing.  */
1521
1522   if (! initialized)
1523     {
1524       int ptr = (((int) array + INSN_CACHE_LINE_WIDTH - 1)
1525                  & -INSN_CACHE_LINE_WIDTH);
1526       int end_ptr = ptr + INSN_CACHE_SIZE;
1527
1528       while (ptr < end_ptr)
1529         {
1530           *(INSTRUCTION_TYPE *)ptr
1531             = JUMP_AHEAD_INSTRUCTION + INSN_CACHE_LINE_WIDTH;
1532           ptr += INSN_CACHE_LINE_WIDTH;
1533         }
1534       *(INSTRUCTION_TYPE *) (ptr - INSN_CACHE_LINE_WIDTH) = RETURN_INSTRUCTION;
1535
1536       initialized = 1;
1537     }
1538
1539   /* Call the beginning of the sequence.  */
1540   (((function_ptr) (((int) array + INSN_CACHE_LINE_WIDTH - 1)
1541                     & -INSN_CACHE_LINE_WIDTH))
1542    ());
1543
1544 #else /* Cache is large.  */
1545
1546   if (! initialized)
1547     {
1548       int ptr = (((int) array + INSN_CACHE_LINE_WIDTH - 1)
1549                  & -INSN_CACHE_LINE_WIDTH);
1550
1551       while (ptr < (int) array + sizeof array)
1552         {
1553           *(INSTRUCTION_TYPE *)ptr = RETURN_INSTRUCTION;
1554           ptr += INSN_CACHE_LINE_WIDTH;
1555         }
1556
1557       initialized = 1;
1558     }
1559
1560   /* Find the location in array that occupies the same cache line as BEG.  */
1561
1562   offset = ((int) beg & -INSN_CACHE_LINE_WIDTH) & (INSN_CACHE_PLANE_SIZE - 1);
1563   start_addr = (((int) (array + INSN_CACHE_PLANE_SIZE - 1)
1564                  & -INSN_CACHE_PLANE_SIZE)
1565                 + offset);
1566
1567   /* Compute the cache alignment of the place to stop clearing.  */
1568 #if 0  /* This is not needed for gcc's purposes.  */
1569   /* If the block to clear is bigger than a cache plane,
1570      we clear the entire cache, and OFFSET is already correct.  */
1571   if (end < beg + INSN_CACHE_PLANE_SIZE)
1572 #endif
1573     offset = (((int) (end + INSN_CACHE_LINE_WIDTH - 1)
1574                & -INSN_CACHE_LINE_WIDTH)
1575               & (INSN_CACHE_PLANE_SIZE - 1));
1576
1577 #if INSN_CACHE_DEPTH > 1
1578   end_addr = (start_addr & -INSN_CACHE_PLANE_SIZE) + offset;
1579   if (end_addr <= start_addr)
1580     end_addr += INSN_CACHE_PLANE_SIZE;
1581
1582   for (plane = 0; plane < INSN_CACHE_DEPTH; plane++)
1583     {
1584       int addr = start_addr + plane * INSN_CACHE_PLANE_SIZE;
1585       int stop = end_addr + plane * INSN_CACHE_PLANE_SIZE;
1586
1587       while (addr != stop)
1588         {
1589           /* Call the return instruction at ADDR.  */
1590           ((function_ptr) addr) ();
1591
1592           addr += INSN_CACHE_LINE_WIDTH;
1593         }
1594     }
1595 #else /* just one plane */
1596   do
1597     {
1598       /* Call the return instruction at START_ADDR.  */
1599       ((function_ptr) start_addr) ();
1600
1601       start_addr += INSN_CACHE_LINE_WIDTH;
1602     }
1603   while ((start_addr % INSN_CACHE_SIZE) != offset);
1604 #endif /* just one plane */
1605 #endif /* Cache is large */
1606 #endif /* Cache exists */
1607 #endif /* CLEAR_INSN_CACHE */
1608 }
1609
1610 #endif /* L_clear_cache */
1611 \f
1612 #ifdef L_trampoline
1613
1614 /* Jump to a trampoline, loading the static chain address.  */
1615
1616 #if defined(WINNT) && ! defined(__CYGWIN__) && ! defined (_UWIN)
1617
1618 long
1619 getpagesize (void)
1620 {
1621 #ifdef _ALPHA_
1622   return 8192;
1623 #else
1624   return 4096;
1625 #endif
1626 }
1627
1628 #ifdef __i386__
1629 extern int VirtualProtect (char *, int, int, int *) __attribute__((stdcall));
1630 #endif
1631
1632 int
1633 mprotect (char *addr, int len, int prot)
1634 {
1635   int np, op;
1636
1637   if (prot == 7)
1638     np = 0x40;
1639   else if (prot == 5)
1640     np = 0x20;
1641   else if (prot == 4)
1642     np = 0x10;
1643   else if (prot == 3)
1644     np = 0x04;
1645   else if (prot == 1)
1646     np = 0x02;
1647   else if (prot == 0)
1648     np = 0x01;
1649
1650   if (VirtualProtect (addr, len, np, &op))
1651     return 0;
1652   else
1653     return -1;
1654 }
1655
1656 #endif /* WINNT && ! __CYGWIN__ && ! _UWIN */
1657
1658 #ifdef TRANSFER_FROM_TRAMPOLINE
1659 TRANSFER_FROM_TRAMPOLINE
1660 #endif
1661
1662 #if defined (NeXT) && defined (__MACH__)
1663
1664 /* Make stack executable so we can call trampolines on stack.
1665    This is called from INITIALIZE_TRAMPOLINE in next.h.  */
1666 #ifdef NeXTStep21
1667  #include <mach.h>
1668 #else
1669  #include <mach/mach.h>
1670 #endif
1671
1672 void
1673 __enable_execute_stack (char *addr)
1674 {
1675   kern_return_t r;
1676   char *eaddr = addr + TRAMPOLINE_SIZE;
1677   vm_address_t a = (vm_address_t) addr;
1678
1679   /* turn on execute access on stack */
1680   r = vm_protect (task_self (), a, TRAMPOLINE_SIZE, FALSE, VM_PROT_ALL);
1681   if (r != KERN_SUCCESS)
1682     {
1683       mach_error("vm_protect VM_PROT_ALL", r);
1684       exit(1);
1685     }
1686
1687   /* We inline the i-cache invalidation for speed */
1688
1689 #ifdef CLEAR_INSN_CACHE
1690   CLEAR_INSN_CACHE (addr, eaddr);
1691 #else
1692   __clear_cache ((int) addr, (int) eaddr);
1693 #endif
1694 }
1695
1696 #endif /* defined (NeXT) && defined (__MACH__) */
1697
1698 #ifdef __convex__
1699
1700 /* Make stack executable so we can call trampolines on stack.
1701    This is called from INITIALIZE_TRAMPOLINE in convex.h.  */
1702
1703 #include <sys/mman.h>
1704 #include <sys/vmparam.h>
1705 #include <machine/machparam.h>
1706
1707 void
1708 __enable_execute_stack (void)
1709 {
1710   int fp;
1711   static unsigned lowest = USRSTACK;
1712   unsigned current = (unsigned) &fp & -NBPG;
1713
1714   if (lowest > current)
1715     {
1716       unsigned len = lowest - current;
1717       mremap (current, &len, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE);
1718       lowest = current;
1719     }
1720
1721   /* Clear instruction cache in case an old trampoline is in it.  */
1722   asm ("pich");
1723 }
1724 #endif /* __convex__ */
1725
1726 #ifdef __sysV88__
1727
1728 /* Modified from the convex -code above.  */
1729
1730 #include <sys/param.h>
1731 #include <errno.h>
1732 #include <sys/m88kbcs.h>
1733
1734 void
1735 __enable_execute_stack (void)
1736 {
1737   int save_errno;
1738   static unsigned long lowest = USRSTACK;
1739   unsigned long current = (unsigned long) &save_errno & -NBPC;
1740
1741   /* Ignore errno being set. memctl sets errno to EINVAL whenever the
1742      address is seen as 'negative'. That is the case with the stack.  */
1743
1744   save_errno=errno;
1745   if (lowest > current)
1746     {
1747       unsigned len=lowest-current;
1748       memctl(current,len,MCT_TEXT);
1749       lowest = current;
1750     }
1751   else
1752     memctl(current,NBPC,MCT_TEXT);
1753   errno=save_errno;
1754 }
1755
1756 #endif /* __sysV88__ */
1757
1758 #ifdef __sysV68__
1759
1760 #include <sys/signal.h>
1761 #include <errno.h>
1762
1763 /* Motorola forgot to put memctl.o in the libp version of libc881.a,
1764    so define it here, because we need it in __clear_insn_cache below */
1765 /* On older versions of this OS, no memctl or MCT_TEXT are defined;
1766    hence we enable this stuff only if MCT_TEXT is #define'd.  */
1767
1768 #ifdef MCT_TEXT
1769 asm("\n\
1770         global memctl\n\
1771 memctl:\n\
1772         movq &75,%d0\n\
1773         trap &0\n\
1774         bcc.b noerror\n\
1775         jmp cerror%\n\
1776 noerror:\n\
1777         movq &0,%d0\n\
1778         rts");
1779 #endif
1780
1781 /* Clear instruction cache so we can call trampolines on stack.
1782    This is called from FINALIZE_TRAMPOLINE in mot3300.h.  */
1783
1784 void
1785 __clear_insn_cache (void)
1786 {
1787 #ifdef MCT_TEXT
1788   int save_errno;
1789
1790   /* Preserve errno, because users would be surprised to have
1791   errno changing without explicitly calling any system-call.  */
1792   save_errno = errno;
1793
1794   /* Keep it simple : memctl (MCT_TEXT) always fully clears the insn cache.
1795      No need to use an address derived from _start or %sp, as 0 works also.  */
1796   memctl(0, 4096, MCT_TEXT);
1797   errno = save_errno;
1798 #endif
1799 }
1800
1801 #endif /* __sysV68__ */
1802
1803 #ifdef __pyr__
1804
1805 #undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch.  */
1806 #include <stdio.h>
1807 #include <sys/mman.h>
1808 #include <sys/types.h>
1809 #include <sys/param.h>
1810 #include <sys/vmmac.h>
1811
1812 /* Modified from the convex -code above.
1813    mremap promises to clear the i-cache.  */
1814
1815 void
1816 __enable_execute_stack (void)
1817 {
1818   int fp;
1819   if (mprotect (((unsigned int)&fp/PAGSIZ)*PAGSIZ, PAGSIZ,
1820                 PROT_READ|PROT_WRITE|PROT_EXEC))
1821     {
1822       perror ("mprotect in __enable_execute_stack");
1823       fflush (stderr);
1824       abort ();
1825     }
1826 }
1827 #endif /* __pyr__ */
1828
1829 #if defined (sony_news) && defined (SYSTYPE_BSD)
1830
1831 #include <stdio.h>
1832 #include <sys/types.h>
1833 #include <sys/param.h>
1834 #include <syscall.h>
1835 #include <machine/sysnews.h>
1836
1837 /* cacheflush function for NEWS-OS 4.2.
1838    This function is called from trampoline-initialize code
1839    defined in config/mips/mips.h.  */
1840
1841 void
1842 cacheflush (char *beg, int size, int flag)
1843 {
1844   if (syscall (SYS_sysnews, NEWS_CACHEFLUSH, beg, size, FLUSH_BCACHE))
1845     {
1846       perror ("cache_flush");
1847       fflush (stderr);
1848       abort ();
1849     }
1850 }
1851
1852 #endif /* sony_news */
1853 #endif /* L_trampoline */
1854 \f
1855 #ifndef __CYGWIN__
1856 #ifdef L__main
1857
1858 #include "gbl-ctors.h"
1859 /* Some systems use __main in a way incompatible with its use in gcc, in these
1860    cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
1861    give the same symbol without quotes for an alternative entry point.  You
1862    must define both, or neither.  */
1863 #ifndef NAME__MAIN
1864 #define NAME__MAIN "__main"
1865 #define SYMBOL__MAIN __main
1866 #endif
1867
1868 #ifdef INIT_SECTION_ASM_OP
1869 #undef HAS_INIT_SECTION
1870 #define HAS_INIT_SECTION
1871 #endif
1872
1873 #if !defined (HAS_INIT_SECTION) || !defined (OBJECT_FORMAT_ELF)
1874
1875 /* Some ELF crosses use crtstuff.c to provide __CTOR_LIST__, but use this
1876    code to run constructors.  In that case, we need to handle EH here, too.  */
1877
1878 #ifdef EH_FRAME_SECTION_NAME
1879 #include "unwind-dw2-fde.h"
1880 extern unsigned char __EH_FRAME_BEGIN__[];
1881 #endif
1882
1883 /* Run all the global destructors on exit from the program.  */
1884
1885 void
1886 __do_global_dtors (void)
1887 {
1888 #ifdef DO_GLOBAL_DTORS_BODY
1889   DO_GLOBAL_DTORS_BODY;
1890 #else
1891   static func_ptr *p = __DTOR_LIST__ + 1;
1892   while (*p)
1893     {
1894       p++;
1895       (*(p-1)) ();
1896     }
1897 #endif
1898 #if defined (EH_FRAME_SECTION_NAME) && !defined (HAS_INIT_SECTION)
1899   {
1900     static int completed = 0;
1901     if (! completed)
1902       {
1903         completed = 1;
1904         __deregister_frame_info (__EH_FRAME_BEGIN__);
1905       }
1906   }
1907 #endif
1908 }
1909 #endif
1910
1911 #ifndef HAS_INIT_SECTION
1912 /* Run all the global constructors on entry to the program.  */
1913
1914 void
1915 __do_global_ctors (void)
1916 {
1917 #ifdef EH_FRAME_SECTION_NAME
1918   {
1919     static struct object object;
1920     __register_frame_info (__EH_FRAME_BEGIN__, &object);
1921   }
1922 #endif
1923   DO_GLOBAL_CTORS_BODY;
1924   atexit (__do_global_dtors);
1925 }
1926 #endif /* no HAS_INIT_SECTION */
1927
1928 #if !defined (HAS_INIT_SECTION) || defined (INVOKE__main)
1929 /* Subroutine called automatically by `main'.
1930    Compiling a global function named `main'
1931    produces an automatic call to this function at the beginning.
1932
1933    For many systems, this routine calls __do_global_ctors.
1934    For systems which support a .init section we use the .init section
1935    to run __do_global_ctors, so we need not do anything here.  */
1936
1937 void
1938 SYMBOL__MAIN ()
1939 {
1940   /* Support recursive calls to `main': run initializers just once.  */
1941   static int initialized;
1942   if (! initialized)
1943     {
1944       initialized = 1;
1945       __do_global_ctors ();
1946     }
1947 }
1948 #endif /* no HAS_INIT_SECTION or INVOKE__main */
1949
1950 #endif /* L__main */
1951 #endif /* __CYGWIN__ */
1952 \f
1953 #ifdef L_ctors
1954
1955 #include "gbl-ctors.h"
1956
1957 /* Provide default definitions for the lists of constructors and
1958    destructors, so that we don't get linker errors.  These symbols are
1959    intentionally bss symbols, so that gld and/or collect will provide
1960    the right values.  */
1961
1962 /* We declare the lists here with two elements each,
1963    so that they are valid empty lists if no other definition is loaded.
1964
1965    If we are using the old "set" extensions to have the gnu linker
1966    collect ctors and dtors, then we __CTOR_LIST__ and __DTOR_LIST__
1967    must be in the bss/common section.
1968
1969    Long term no port should use those extensions.  But many still do.  */
1970 #if !defined(INIT_SECTION_ASM_OP) && !defined(CTOR_LISTS_DEFINED_EXTERNALLY)
1971 #if defined (TARGET_ASM_CONSTRUCTOR) || defined (USE_COLLECT2)
1972 func_ptr __CTOR_LIST__[2] = {0, 0};
1973 func_ptr __DTOR_LIST__[2] = {0, 0};
1974 #else
1975 func_ptr __CTOR_LIST__[2];
1976 func_ptr __DTOR_LIST__[2];
1977 #endif
1978 #endif /* no INIT_SECTION_ASM_OP and not CTOR_LISTS_DEFINED_EXTERNALLY */
1979 #endif /* L_ctors */
1980 \f
1981 #ifdef L_exit
1982
1983 #include "gbl-ctors.h"
1984
1985 #ifdef NEED_ATEXIT
1986
1987 #ifndef ON_EXIT
1988
1989 # include <errno.h>
1990
1991 static func_ptr *atexit_chain = 0;
1992 static long atexit_chain_length = 0;
1993 static volatile long last_atexit_chain_slot = -1;
1994
1995 int
1996 atexit (func_ptr func)
1997 {
1998   if (++last_atexit_chain_slot == atexit_chain_length)
1999     {
2000       atexit_chain_length += 32;
2001       if (atexit_chain)
2002         atexit_chain = (func_ptr *) realloc (atexit_chain, atexit_chain_length
2003                                              * sizeof (func_ptr));
2004       else
2005         atexit_chain = (func_ptr *) malloc (atexit_chain_length
2006                                             * sizeof (func_ptr));
2007       if (! atexit_chain)
2008         {
2009           atexit_chain_length = 0;
2010           last_atexit_chain_slot = -1;
2011           errno = ENOMEM;
2012           return (-1);
2013         }
2014     }
2015   atexit_chain[last_atexit_chain_slot] = func;
2016   return (0);
2017 }
2018
2019 extern void _cleanup (void);
2020 extern void _exit (int) __attribute__ ((__noreturn__));
2021
2022 void
2023 exit (int status)
2024 {
2025   if (atexit_chain)
2026     {
2027       for ( ; last_atexit_chain_slot-- >= 0; )
2028         {
2029           (*atexit_chain[last_atexit_chain_slot + 1]) ();
2030           atexit_chain[last_atexit_chain_slot + 1] = 0;
2031         }
2032       free (atexit_chain);
2033       atexit_chain = 0;
2034     }
2035 #ifdef EXIT_BODY
2036   EXIT_BODY;
2037 #else
2038   _cleanup ();
2039 #endif
2040   _exit (status);
2041 }
2042
2043 #else /* ON_EXIT */
2044
2045 /* Simple; we just need a wrapper for ON_EXIT.  */
2046 int
2047 atexit (func_ptr func)
2048 {
2049   return ON_EXIT (func);
2050 }
2051
2052 #endif /* ON_EXIT */
2053 #endif /* NEED_ATEXIT */
2054
2055 #endif /* L_exit */