gdtoa/FreeBSD/gdtoaimp.h

   1 /****************************************************************
   2
   3 The author of this software is David M. Gay.
   4
   5 Copyright (C) 1998-2000 by Lucent Technologies
   6 All Rights Reserved
   7
   8 Permission to use, copy, modify, and distribute this software and
   9 its documentation for any purpose and without fee is hereby
  10 granted, provided that the above copyright notice appear in all
  11 copies and that both that the copyright notice and this
  12 permission notice and warranty disclaimer appear in supporting
  13 documentation, and that the name of Lucent or any of its entities
  14 not be used in advertising or publicity pertaining to
  15 distribution of the software without specific, written prior
  16 permission.
  17
  18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
  20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
  21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
  23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
  25 THIS SOFTWARE.
  26
  27 ****************************************************************/
  28
  29 /* $FreeBSD: src/contrib/gdtoa/gdtoaimp.h,v 1.5 2003/04/09 06:04:35 das Exp $ */
  30
  31 /* This is a variation on dtoa.c that converts arbitary binary
  32    floating-point formats to and from decimal notation.  It uses
  33    double-precision arithmetic internally, so there are still
  34    various #ifdefs that adapt the calculations to the native
  35    double-precision arithmetic (any of IEEE, VAX D_floating,
  36    or IBM mainframe arithmetic).
  37
  38    Please send bug reports to
  39         David M. Gay
  40         Bell Laboratories, Room 2C-463
  41         600 Mountain Avenue
  42         Murray Hill, NJ 07974-0636
  43         U.S.A.
  44         dmg@bell-labs.com
  45  */
  46
  47 /* On a machine with IEEE extended-precision registers, it is
  48  * necessary to specify double-precision (53-bit) rounding precision
  49  * before invoking strtod or dtoa.  If the machine uses (the equivalent
  50  * of) Intel 80x87 arithmetic, the call
  51  *      _control87(PC_53, MCW_PC);
  52  * does this with many compilers.  Whether this or another call is
  53  * appropriate depends on the compiler; for this to work, it may be
  54  * necessary to #include "float.h" or another system-dependent header
  55  * file.
  56  */
  57
  58 /* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
  59  *
  60  * This strtod returns a nearest machine number to the input decimal
  61  * string (or sets errno to ERANGE).  With IEEE arithmetic, ties are
  62  * broken by the IEEE round-even rule.  Otherwise ties are broken by
  63  * biased rounding (add half and chop).
  64  *
  65  * Inspired loosely by William D. Clinger's paper "How to Read Floating
  66  * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
  67  *
  68  * Modifications:
  69  *
  70  *      1. We only require IEEE, IBM, or VAX double-precision
  71  *              arithmetic (not IEEE double-extended).
  72  *      2. We get by with floating-point arithmetic in a case that
  73  *              Clinger missed -- when we're computing d * 10^n
  74  *              for a small integer d and the integer n is not too
  75  *              much larger than 22 (the maximum integer k for which
  76  *              we can represent 10^k exactly), we may be able to
  77  *              compute (d*10^k) * 10^(e-k) with just one roundoff.
  78  *      3. Rather than a bit-at-a-time adjustment of the binary
  79  *              result in the hard case, we use floating-point
  80  *              arithmetic to determine the adjustment to within
  81  *              one bit; only in really hard cases do we need to
  82  *              compute a second residual.
  83  *      4. Because of 3., we don't need a large table of powers of 10
  84  *              for ten-to-e (just some small tables, e.g. of 10^k
  85  *              for 0 <= k <= 22).
  86  */
  87
  88 /*
  89  * #define IEEE_8087 for IEEE-arithmetic machines where the least
  90  *      significant byte has the lowest address.
  91  * #define IEEE_MC68k for IEEE-arithmetic machines where the most
  92  *      significant byte has the lowest address.
  93  * #define Long int on machines with 32-bit ints and 64-bit longs.
  94  * #define Sudden_Underflow for IEEE-format machines without gradual
  95  *      underflow (i.e., that flush to zero on underflow).
  96  * #define IBM for IBM mainframe-style floating-point arithmetic.
  97  * #define VAX for VAX-style floating-point arithmetic (D_floating).
  98  * #define No_leftright to omit left-right logic in fast floating-point
  99  *      computation of dtoa.
 100  * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3.
 101  * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
 102  *      that use extended-precision instructions to compute rounded
 103  *      products and quotients) with IBM.
 104  * #define ROUND_BIASED for IEEE-format with biased rounding.
 105  * #define Inaccurate_Divide for IEEE-format with correctly rounded
 106  *      products but inaccurate quotients, e.g., for Intel i860.
 107  * #define NO_LONG_LONG on machines that do not have a "long long"
 108  *      integer type (of >= 64 bits).  On such machines, you can
 109  *      #define Just_16 to store 16 bits per 32-bit Long when doing
 110  *      high-precision integer arithmetic.  Whether this speeds things
 111  *      up or slows things down depends on the machine and the number
 112  *      being converted.  If long long is available and the name is
 113  *      something other than "long long", #define Llong to be the name,
 114  *      and if "unsigned Llong" does not work as an unsigned version of
 115  *      Llong, #define #ULLong to be the corresponding unsigned type.
 116  * #define KR_headers for old-style C function headers.
 117  * #define Bad_float_h if your system lacks a float.h or if it does not
 118  *      define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
 119  *      FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
 120  * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
 121  *      if memory is available and otherwise does something you deem
 122  *      appropriate.  If MALLOC is undefined, malloc will be invoked
 123  *      directly -- and assumed always to succeed.
 124  * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
 125  *      memory allocations from a private pool of memory when possible.
 126  *      When used, the private pool is PRIVATE_MEM bytes long:  2304 bytes,
 127  *      unless #defined to be a different length.  This default length
 128  *      suffices to get rid of MALLOC calls except for unusual cases,
 129  *      such as decimal-to-binary conversion of a very long string of
 130  *      digits.  When converting IEEE double precision values, the
 131  *      longest string gdtoa can return is about 751 bytes long.  For
 132  *      conversions by strtod of strings of 800 digits and all gdtoa
 133  *      conversions of IEEE doubles in single-threaded executions with
 134  *      8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with
 135  *      4-byte pointers, PRIVATE_MEM >= 7112 appears adequate.
 136  * #define INFNAN_CHECK on IEEE systems to cause strtod to check for
 137  *      Infinity and NaN (case insensitively).  On some systems (e.g.,
 138  *      some HP systems), it may be necessary to #define NAN_WORD0
 139  *      appropriately -- to the most significant word of a quiet NaN.
 140  *      (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
 141  *      When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
 142  *      strtodg also accepts (case insensitively) strings of the form
 143  *      NaN(x), where x is a string of hexadecimal digits and spaces;
 144  *      if there is only one string of hexadecimal digits, it is taken
 145  *      for the fraction bits of the resulting NaN; if there are two or
 146  *      more strings of hexadecimal digits, each string is assigned
 147  *      to the next available sequence of 32-bit words of fractions
 148  *      bits (starting with the most significant), right-aligned in
 149  *      each sequence.
 150  * #define MULTIPLE_THREADS if the system offers preemptively scheduled
 151  *      multiple threads.  In this case, you must provide (or suitably
 152  *      #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
 153  *      by FREE_DTOA_LOCK(n) for n = 0 or 1.  (The second lock, accessed
 154  *      in pow5mult, ensures lazy evaluation of only one copy of high
 155  *      powers of 5; omitting this lock would introduce a small
 156  *      probability of wasting memory, but would otherwise be harmless.)
 157  *      You must also invoke freedtoa(s) to free the value s returned by
 158  *      dtoa.  You may do so whether or not MULTIPLE_THREADS is #defined.
 159  * #define IMPRECISE_INEXACT if you do not care about the setting of
 160  *      the STRTOG_Inexact bits in the special case of doing IEEE double
 161  *      precision conversions (which could also be done by the strtog in
 162  *      dtoa.c).
 163  * #define NO_HEX_FP to disable recognition of C9x's hexadecimal
 164  *      floating-point constants.
 165  * #define -DNO_ERRNO to suppress setting errno (in strtod.c and
 166  *      strtodg.c).
 167  * #define NO_STRING_H to use private versions of memcpy.
 168  *      On some K&R systems, it may also be necessary to
 169  *      #define DECLARE_SIZE_T in this case.
 170  * #define YES_ALIAS to permit aliasing certain double values with
 171  *      arrays of ULongs.  This leads to slightly better code with
 172  *      some compilers and was always used prior to 19990916, but it
 173  *      is not strictly legal and can cause trouble with aggressively
 174  *      optimizing compilers (e.g., gcc 2.95.1 under -O2).
 175  * #define USE_LOCALE to use the current locale's decimal_point value.
 176  */
 177
 178 #ifndef GDTOAIMP_H_INCLUDED
 179 #define GDTOAIMP_H_INCLUDED
 180 #include "gdtoa.h"
 181
 182 #ifdef DEBUG
 183 #include "stdio.h"
 184 #define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
 185 #endif
 186
 187 #include "limits.h"
 188 #include "stdlib.h"
 189 #include "string.h"
 190 #include "libc_private.h"
 191 #include "spinlock.h"
 192
 193 #ifdef KR_headers
 194 #define Char char
 195 #else
 196 #define Char void
 197 #endif
 198
 199 #ifdef MALLOC
 200 extern Char *MALLOC ANSI((size_t));
 201 #else
 202 #define MALLOC malloc
 203 #endif
 204
 205 #define INFNAN_CHECK
 206 #define USE_LOCALE
 207
 208 #undef IEEE_Arith
 209 #undef Avoid_Underflow
 210 #ifdef IEEE_MC68k
 211 #define IEEE_Arith
 212 #endif
 213 #ifdef IEEE_8087
 214 #define IEEE_Arith
 215 #endif
 216
 217 #include "errno.h"
 218 #ifdef Bad_float_h
 219
 220 #ifdef IEEE_Arith
 221 #define DBL_DIG 15
 222 #define DBL_MAX_10_EXP 308
 223 #define DBL_MAX_EXP 1024
 224 #define FLT_RADIX 2
 225 #define DBL_MAX 1.7976931348623157e+308
 226 #endif
 227
 228 #ifdef IBM
 229 #define DBL_DIG 16
 230 #define DBL_MAX_10_EXP 75
 231 #define DBL_MAX_EXP 63
 232 #define FLT_RADIX 16
 233 #define DBL_MAX 7.2370055773322621e+75
 234 #endif
 235
 236 #ifdef VAX
 237 #define DBL_DIG 16
 238 #define DBL_MAX_10_EXP 38
 239 #define DBL_MAX_EXP 127
 240 #define FLT_RADIX 2
 241 #define DBL_MAX 1.7014118346046923e+38
 242 #define n_bigtens 2
 243 #endif
 244
 245 #ifndef LONG_MAX
 246 #define LONG_MAX 2147483647
 247 #endif
 248
 249 #else /* ifndef Bad_float_h */
 250 #include "float.h"
 251 #endif /* Bad_float_h */
 252
 253 #ifdef IEEE_Arith
 254 #define Scale_Bit 0x10
 255 #define n_bigtens 5
 256 #endif
 257
 258 #ifdef IBM
 259 #define n_bigtens 3
 260 #endif
 261
 262 #ifdef VAX
 263 #define n_bigtens 2
 264 #endif
 265
 266 #ifndef __MATH_H__
 267 #include "math.h"
 268 #endif
 269
 270 #ifdef __cplusplus
 271 extern "C" {
 272 #endif
 273
 274 #if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(VAX) + defined(IBM) != 1
 275 Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
 276 #endif
 277
 278 typedef union { double d; ULong L[2]; } U;
 279
 280 #ifdef YES_ALIAS
 281 #define dval(x) x
 282 #ifdef IEEE_8087
 283 #define word0(x) ((ULong *)&x)[1]
 284 #define word1(x) ((ULong *)&x)[0]
 285 #else
 286 #define word0(x) ((ULong *)&x)[0]
 287 #define word1(x) ((ULong *)&x)[1]
 288 #endif
 289 #else /* !YES_ALIAS */
 290 #ifdef IEEE_8087
 291 #define word0(x) ((U*)&x)->L[1]
 292 #define word1(x) ((U*)&x)->L[0]
 293 #else
 294 #define word0(x) ((U*)&x)->L[0]
 295 #define word1(x) ((U*)&x)->L[1]
 296 #endif
 297 #define dval(x) ((U*)&x)->d
 298 #endif /* YES_ALIAS */
 299
 300 /* The following definition of Storeinc is appropriate for MIPS processors.
 301  * An alternative that might be better on some machines is
 302  * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
 303  */
 304 #if defined(IEEE_8087) + defined(VAX)
 305 #define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
 306 ((unsigned short *)a)[0] = (unsigned short)c, a++)
 307 #else
 308 #define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
 309 ((unsigned short *)a)[1] = (unsigned short)c, a++)
 310 #endif
 311
 312 /* #define P DBL_MANT_DIG */
 313 /* Ten_pmax = floor(P*log(2)/log(5)) */
 314 /* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
 315 /* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
 316 /* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
 317
 318 #ifdef IEEE_Arith
 319 #define Exp_shift  20
 320 #define Exp_shift1 20
 321 #define Exp_msk1    0x100000
 322 #define Exp_msk11   0x100000
 323 #define Exp_mask  0x7ff00000
 324 #define P 53
 325 #define Bias 1023
 326 #define Emin (-1022)
 327 #define Exp_1  0x3ff00000
 328 #define Exp_11 0x3ff00000
 329 #define Ebits 11
 330 #define Frac_mask  0xfffff
 331 #define Frac_mask1 0xfffff
 332 #define Ten_pmax 22
 333 #define Bletch 0x10
 334 #define Bndry_mask  0xfffff
 335 #define Bndry_mask1 0xfffff
 336 #define LSB 1
 337 #define Sign_bit 0x80000000
 338 #define Log2P 1
 339 #define Tiny0 0
 340 #define Tiny1 1
 341 #define Quick_max 14
 342 #define Int_max 14
 343
 344 #ifndef Flt_Rounds
 345 #ifdef FLT_ROUNDS
 346 #define Flt_Rounds FLT_ROUNDS
 347 #else
 348 #define Flt_Rounds 1
 349 #endif
 350 #endif /*Flt_Rounds*/
 351
 352 #else /* ifndef IEEE_Arith */
 353 #undef  Sudden_Underflow
 354 #define Sudden_Underflow
 355 #ifdef IBM
 356 #undef Flt_Rounds
 357 #define Flt_Rounds 0
 358 #define Exp_shift  24
 359 #define Exp_shift1 24
 360 #define Exp_msk1   0x1000000
 361 #define Exp_msk11  0x1000000
 362 #define Exp_mask  0x7f000000
 363 #define P 14
 364 #define Bias 65
 365 #define Exp_1  0x41000000
 366 #define Exp_11 0x41000000
 367 #define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
 368 #define Frac_mask  0xffffff
 369 #define Frac_mask1 0xffffff
 370 #define Bletch 4
 371 #define Ten_pmax 22
 372 #define Bndry_mask  0xefffff
 373 #define Bndry_mask1 0xffffff
 374 #define LSB 1
 375 #define Sign_bit 0x80000000
 376 #define Log2P 4
 377 #define Tiny0 0x100000
 378 #define Tiny1 0
 379 #define Quick_max 14
 380 #define Int_max 15
 381 #else /* VAX */
 382 #undef Flt_Rounds
 383 #define Flt_Rounds 1
 384 #define Exp_shift  23
 385 #define Exp_shift1 7
 386 #define Exp_msk1    0x80
 387 #define Exp_msk11   0x800000
 388 #define Exp_mask  0x7f80
 389 #define P 56
 390 #define Bias 129
 391 #define Exp_1  0x40800000
 392 #define Exp_11 0x4080
 393 #define Ebits 8
 394 #define Frac_mask  0x7fffff
 395 #define Frac_mask1 0xffff007f
 396 #define Ten_pmax 24
 397 #define Bletch 2
 398 #define Bndry_mask  0xffff007f
 399 #define Bndry_mask1 0xffff007f
 400 #define LSB 0x10000
 401 #define Sign_bit 0x8000
 402 #define Log2P 1
 403 #define Tiny0 0x80
 404 #define Tiny1 0
 405 #define Quick_max 15
 406 #define Int_max 15
 407 #endif /* IBM, VAX */
 408 #endif /* IEEE_Arith */
 409
 410 #ifndef IEEE_Arith
 411 #define ROUND_BIASED
 412 #endif
 413
 414 #ifdef RND_PRODQUOT
 415 #define rounded_product(a,b) a = rnd_prod(a, b)
 416 #define rounded_quotient(a,b) a = rnd_quot(a, b)
 417 #ifdef KR_headers
 418 extern double rnd_prod(), rnd_quot();
 419 #else
 420 extern double rnd_prod(double, double), rnd_quot(double, double);
 421 #endif
 422 #else
 423 #define rounded_product(a,b) a *= b
 424 #define rounded_quotient(a,b) a /= b
 425 #endif
 426
 427 #define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
 428 #define Big1 0xffffffff
 429
 430 #undef  Pack_16
 431 #ifndef Pack_32
 432 #define Pack_32
 433 #endif
 434
 435 #ifdef NO_LONG_LONG
 436 #undef ULLong
 437 #ifdef Just_16
 438 #undef Pack_32
 439 #define Pack_16
 440 /* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
 441  * This makes some inner loops simpler and sometimes saves work
 442  * during multiplications, but it often seems to make things slightly
 443  * slower.  Hence the default is now to store 32 bits per Long.
 444  */
 445 #endif
 446 #else   /* long long available */
 447 #ifndef Llong
 448 #define Llong long long
 449 #endif
 450 #ifndef ULLong
 451 #define ULLong unsigned Llong
 452 #endif
 453 #endif /* NO_LONG_LONG */
 454
 455 #ifdef Pack_32
 456 #define ULbits 32
 457 #define kshift 5
 458 #define kmask 31
 459 #define ALL_ON 0xffffffff
 460 #else
 461 #define ULbits 16
 462 #define kshift 4
 463 #define kmask 15
 464 #define ALL_ON 0xffff
 465 #endif
 466
 467 #define MULTIPLE_THREADS
 468 extern spinlock_t __gdtoa_locks[2];
 469 #define ACQUIRE_DTOA_LOCK(n)    do {            \
 470         if (__isthreaded)                       \
 471                 _SPINLOCK(&__gdtoa_locks[n]);   \
 472 } while(0)
 473 #define FREE_DTOA_LOCK(n)       do {            \
 474         if (__isthreaded)                       \
 475                 _SPINUNLOCK(&__gdtoa_locks[n]); \
 476 } while(0)
 477
 478 #define Kmax 15
 479
 480  struct
 481 Bigint {
 482         struct Bigint *next;
 483         int k, maxwds, sign, wds;
 484         ULong x[1];
 485         };
 486
 487  typedef struct Bigint Bigint;
 488
 489 #ifdef NO_STRING_H
 490 #ifdef DECLARE_SIZE_T
 491 typedef unsigned int size_t;
 492 #endif
 493 extern void memcpy_D2A ANSI((void*, const void*, size_t));
 494 #define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
 495 #else /* !NO_STRING_H */
 496 #define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
 497 #endif /* NO_STRING_H */
 498
 499 /*
 500  * Paranoia: Protect exported symbols, including ones in files we don't
 501  * compile right now.  The standard strtof and strtod survive.
 502  */
 503 #define dtoa            __dtoa
 504 #define gdtoa           __gdtoa
 505 #define freedtoa        __freedtoa
 506 #define strtodg         __strtodg
 507 #define g_ddfmt         __g_ddfmt
 508 #define g_dfmt          __g_dfmt
 509 #define g_ffmt          __g_ffmt
 510 #define g_Qfmt          __g_Qfmt
 511 #define g_xfmt          __g_xfmt
 512 #define g_xLfmt         __g_xLfmt
 513 #define strtoId         __strtoId
 514 #define strtoIdd        __strtoIdd
 515 #define strtoIf         __strtoIf
 516 #define strtoIQ         __strtoIQ
 517 #define strtoIx         __strtoIx
 518 #define strtoIxL        __strtoIxL
 519 #define strtord         __strtord
 520 #define strtordd        __strtordd
 521 #define strtorf         __strtorf
 522 #define strtorQ         __strtorQ
 523 #define strtorx         __strtorx
 524 #define strtorxL        __strtorxL
 525 #define strtodI         __strtodI
 526 #define strtopd         __strtopd
 527 #define strtopdd        __strtopdd
 528 #define strtopf         __strtopf
 529 #define strtopQ         __strtopQ
 530 #define strtopx         __strtopx
 531 #define strtopxL        __strtopxL
 532
 533 /* Protect gdtoa-internal symbols */
 534 #define Balloc          __Balloc_D2A
 535 #define Bfree           __Bfree_D2A
 536 #define ULtoQ           __ULtoQ_D2A
 537 #define ULtof           __ULtof_D2A
 538 #define ULtod           __ULtod_D2A
 539 #define ULtodd          __ULtodd_D2A
 540 #define ULtox           __ULtox_D2A
 541 #define ULtoxL          __ULtoxL_D2A
 542 #define any_on          __any_on_D2A
 543 #define b2d             __b2d_D2A
 544 #define bigtens         __bigtens_D2A
 545 #define cmp             __cmp_D2A
 546 #define copybits        __copybits_D2A
 547 #define d2b             __d2b_D2A
 548 #define decrement       __decrement_D2A
 549 #define diff            __diff_D2A
 550 #define dtoa_result     __dtoa_result_D2A
 551 #define g__fmt          __g__fmt_D2A
 552 #define gethex          __gethex_D2A
 553 #define hexdig          __hexdig_D2A
 554 #define hexdig_init_D2A __hexdig_init_D2A
 555 #define hexnan          __hexnan_D2A
 556 #define hi0bits         __hi0bits_D2A
 557 #define i2b             __i2b_D2A
 558 #define increment       __increment_D2A
 559 #define lo0bits         __lo0bits_D2A
 560 #define lshift          __lshift_D2A
 561 #define match           __match_D2A
 562 #define mult            __mult_D2A
 563 #define multadd         __multadd_D2A
 564 #define nrv_alloc       __nrv_alloc_D2A
 565 #define pow5mult        __pow5mult_D2A
 566 #define quorem          __quorem_D2A
 567 #define ratio           __ratio_D2A
 568 #define rshift          __rshift_D2A
 569 #define rv_alloc        __rv_alloc_D2A
 570 #define s2b             __s2b_D2A
 571 #define set_ones        __set_ones_D2A
 572 #define strcp           __strcp_D2A
 573 #define strcp_D2A       __strcp_D2A
 574 #define strtoIg         __strtoIg_D2A
 575 #define sum             __sum_D2A
 576 #define tens            __tens_D2A
 577 #define tinytens        __tinytens_D2A
 578 #define tinytens        __tinytens_D2A
 579 #define trailz          __trailz_D2A
 580 #define ulp             __ulp_D2A
 581
 582  extern char *dtoa_result;
 583  extern CONST double bigtens[], tens[], tinytens[];
 584  extern unsigned char hexdig[];
 585
 586  extern Bigint *Balloc ANSI((int));
 587  extern void Bfree ANSI((Bigint*));
 588  extern void ULtof ANSI((ULong*, ULong*, Long, int));
 589  extern void ULtod ANSI((ULong*, ULong*, Long, int));
 590  extern void ULtodd ANSI((ULong*, ULong*, Long, int));
 591  extern void ULtoQ ANSI((ULong*, ULong*, Long, int));
 592  extern void ULtox ANSI((UShort*, ULong*, Long, int));
 593  extern void ULtoxL ANSI((ULong*, ULong*, Long, int));
 594  extern ULong any_on ANSI((Bigint*, int));
 595  extern double b2d ANSI((Bigint*, int*));
 596  extern int cmp ANSI((Bigint*, Bigint*));
 597  extern void copybits ANSI((ULong*, int, Bigint*));
 598  extern Bigint *d2b ANSI((double, int*, int*));
 599  extern int decrement ANSI((Bigint*));
 600  extern Bigint *diff ANSI((Bigint*, Bigint*));
 601  extern char *dtoa ANSI((double d, int mode, int ndigits,
 602                         int *decpt, int *sign, char **rve));
 603  extern void freedtoa ANSI((char*));
 604  extern char *gdtoa ANSI((FPI *fpi, int be, ULong *bits, int *kindp,
 605                           int mode, int ndigits, int *decpt, char **rve));
 606  extern char *g__fmt ANSI((char*, char*, char*, int, ULong));
 607  extern int gethex ANSI((CONST char**, FPI*, Long*, Bigint**, int));
 608  extern void hexdig_init_D2A(Void);
 609  extern int hexnan ANSI((CONST char**, FPI*, ULong*));
 610  extern int hi0bits ANSI((ULong));
 611  extern Bigint *i2b ANSI((int));
 612  extern Bigint *increment ANSI((Bigint*));
 613  extern int lo0bits ANSI((ULong*));
 614  extern Bigint *lshift ANSI((Bigint*, int));
 615  extern int match ANSI((CONST char**, char*));
 616  extern Bigint *mult ANSI((Bigint*, Bigint*));
 617  extern Bigint *multadd ANSI((Bigint*, int, int));
 618  extern char *nrv_alloc ANSI((char*, char **, int));
 619  extern Bigint *pow5mult ANSI((Bigint*, int));
 620  extern int quorem ANSI((Bigint*, Bigint*));
 621  extern double ratio ANSI((Bigint*, Bigint*));
 622  extern void rshift ANSI((Bigint*, int));
 623  extern char *rv_alloc ANSI((int));
 624  extern Bigint *s2b ANSI((CONST char*, int, int, ULong));
 625  extern Bigint *set_ones ANSI((Bigint*, int));
 626  extern char *strcp ANSI((char*, const char*));
 627  extern int strtodg ANSI((CONST char*, char**, FPI*, Long*, ULong*));
 628
 629  extern int strtoId ANSI((CONST char *, char **, double *, double *));
 630  extern int strtoIdd ANSI((CONST char *, char **, double *, double *));
 631  extern int strtoIf ANSI((CONST char *, char **, float *, float *));
 632  extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*));
 633  extern int strtoIQ ANSI((CONST char *, char **, void *, void *));
 634  extern int strtoIx ANSI((CONST char *, char **, void *, void *));
 635  extern int strtoIxL ANSI((CONST char *, char **, void *, void *));
 636  extern double strtod ANSI((const char *s00, char **se));
 637  extern int strtopQ ANSI((CONST char *, char **, Void *));
 638  extern int strtopf ANSI((CONST char *, char **, float *));
 639  extern int strtopd ANSI((CONST char *, char **, double *));
 640  extern int strtopdd ANSI((CONST char *, char **, double *));
 641  extern int strtopx ANSI((CONST char *, char **, Void *));
 642  extern int strtopxL ANSI((CONST char *, char **, Void *));
 643  extern int strtord ANSI((CONST char *, char **, int, double *));
 644  extern int strtordd ANSI((CONST char *, char **, int, double *));
 645  extern int strtorf ANSI((CONST char *, char **, int, float *));
 646  extern int strtorQ ANSI((CONST char *, char **, int, void *));
 647  extern int strtorx ANSI((CONST char *, char **, int, void *));
 648  extern int strtorxL ANSI((CONST char *, char **, int, void *));
 649  extern Bigint *sum ANSI((Bigint*, Bigint*));
 650  extern int trailz ANSI((Bigint*));
 651  extern double ulp ANSI((double));
 652
 653 #ifdef __cplusplus
 654 }
 655 #endif
 656
 657
 658 #ifdef IEEE_Arith
 659 #ifdef IEEE_MC68k
 660 #define _0 0
 661 #define _1 1
 662 #else
 663 #define _0 1
 664 #define _1 0
 665 #endif
 666 #else
 667 #undef INFNAN_CHECK
 668 #endif
 669
 670 #ifdef INFNAN_CHECK
 671
 672 #ifndef NAN_WORD0
 673 #define NAN_WORD0 0x7ff80000
 674 #endif
 675
 676 #ifndef NAN_WORD1
 677 #define NAN_WORD1 0
 678 #endif
 679 #endif  /* INFNAN_CHECK */
 680
 681 #undef SI
 682 #ifdef Sudden_Underflow
 683 #define SI 1
 684 #else
 685 #define SI 0
 686 #endif
 687
 688 #endif /* GDTOAIMP_H_INCLUDED */