1/* $NetBSD: gdtoaimp.h,v 1.11 2011/03/21 22:33:29 christos Exp $ */ 2 3/**************************************************************** 4 5The author of this software is David M. Gay. 6 7Copyright (C) 1998-2000 by Lucent Technologies 8All Rights Reserved 9 10Permission to use, copy, modify, and distribute this software and 11its documentation for any purpose and without fee is hereby 12granted, provided that the above copyright notice appear in all 13copies and that both that the copyright notice and this 14permission notice and warranty disclaimer appear in supporting 15documentation, and that the name of Lucent or any of its entities 16not be used in advertising or publicity pertaining to 17distribution of the software without specific, written prior 18permission. 19 20LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 21INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 22IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 23SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 24WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 25IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 26ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 27THIS SOFTWARE. 28 29****************************************************************/ 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 David M. Gay (dmg at acm dot org, 39 with " at " changed at "@" and " dot " changed to "."). 40 */ 41 42/* On a machine with IEEE extended-precision registers, it is 43 * necessary to specify double-precision (53-bit) rounding precision 44 * before invoking strtod or dtoa. If the machine uses (the equivalent 45 * of) Intel 80x87 arithmetic, the call 46 * _control87(PC_53, MCW_PC); 47 * does this with many compilers. Whether this or another call is 48 * appropriate depends on the compiler; for this to work, it may be 49 * necessary to #include "float.h" or another system-dependent header 50 * file. 51 */ 52 53/* strtod for IEEE-, VAX-, and IBM-arithmetic machines. 54 * 55 * This strtod returns a nearest machine number to the input decimal 56 * string (or sets errno to ERANGE). With IEEE arithmetic, ties are 57 * broken by the IEEE round-even rule. Otherwise ties are broken by 58 * biased rounding (add half and chop). 59 * 60 * Inspired loosely by William D. Clinger's paper "How to Read Floating 61 * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 112-126]. 62 * 63 * Modifications: 64 * 65 * 1. We only require IEEE, IBM, or VAX double-precision 66 * arithmetic (not IEEE double-extended). 67 * 2. We get by with floating-point arithmetic in a case that 68 * Clinger missed -- when we're computing d * 10^n 69 * for a small integer d and the integer n is not too 70 * much larger than 22 (the maximum integer k for which 71 * we can represent 10^k exactly), we may be able to 72 * compute (d*10^k) * 10^(e-k) with just one roundoff. 73 * 3. Rather than a bit-at-a-time adjustment of the binary 74 * result in the hard case, we use floating-point 75 * arithmetic to determine the adjustment to within 76 * one bit; only in really hard cases do we need to 77 * compute a second residual. 78 * 4. Because of 3., we don't need a large table of powers of 10 79 * for ten-to-e (just some small tables, e.g. of 10^k 80 * for 0 <= k <= 22). 81 */ 82 83/* 84 * #define IEEE_LITTLE_ENDIAN for IEEE-arithmetic machines where the least 85 * significant byte has the lowest address. 86 * #define IEEE_BIG_ENDIAN for IEEE-arithmetic machines where the most 87 * significant byte has the lowest address. 88 * #define Long int on machines with 32-bit ints and 64-bit longs. 89 * #define Sudden_Underflow for IEEE-format machines without gradual 90 * underflow (i.e., that flush to zero on underflow). 91 * #define IBM for IBM mainframe-style floating-point arithmetic. 92 * #define VAX for VAX-style floating-point arithmetic (D_floating). 93 * #define No_leftright to omit left-right logic in fast floating-point 94 * computation of dtoa. 95 * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3. 96 * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines 97 * that use extended-precision instructions to compute rounded 98 * products and quotients) with IBM. 99 * #define ROUND_BIASED for IEEE-format with biased rounding and arithmetic 100 * that rounds toward +Infinity. 101 * #define ROUND_BIASED_without_Round_Up for IEEE-format with biased 102 * rounding when the underlying floating-point arithmetic uses 103 * unbiased rounding. This prevent using ordinary floating-point 104 * arithmetic when the result could be computed with one rounding error. 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. Similarly, if you 124 * want something other than the system's free() to be called to 125 * recycle memory acquired from MALLOC, #define FREE to be the 126 * name of the alternate routine. (FREE or free is only called in 127 * pathological cases, e.g., in a gdtoa call after a gdtoa return in 128 * mode 3 with thousands of digits requested.) 129 * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making 130 * memory allocations from a private pool of memory when possible. 131 * When used, the private pool is PRIVATE_MEM bytes long: 2304 bytes, 132 * unless #defined to be a different length. This default length 133 * suffices to get rid of MALLOC calls except for unusual cases, 134 * such as decimal-to-binary conversion of a very long string of 135 * digits. When converting IEEE double precision values, the 136 * longest string gdtoa can return is about 751 bytes long. For 137 * conversions by strtod of strings of 800 digits and all gdtoa 138 * conversions of IEEE doubles in single-threaded executions with 139 * 8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with 140 * 4-byte pointers, PRIVATE_MEM >= 7112 appears adequate. 141 * #define NO_INFNAN_CHECK if you do not wish to have INFNAN_CHECK 142 * #defined automatically on IEEE systems. On such systems, 143 * when INFNAN_CHECK is #defined, strtod checks 144 * for Infinity and NaN (case insensitively). 145 * When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined, 146 * strtodg also accepts (case insensitively) strings of the form 147 * NaN(x), where x is a string of hexadecimal digits (optionally 148 * preceded by 0x or 0X) and spaces; if there is only one string 149 * of hexadecimal digits, it is taken for the fraction bits of the 150 * resulting NaN; if there are two or more strings of hexadecimal 151 * digits, each string is assigned to the next available sequence 152 * of 32-bit words of fractions bits (starting with the most 153 * significant), right-aligned in each sequence. 154 * Unless GDTOA_NON_PEDANTIC_NANCHECK is #defined, input "NaN(...)" 155 * is consumed even when ... has the wrong form (in which case the 156 * "(...)" is consumed but ignored). 157 * #define MULTIPLE_THREADS if the system offers preemptively scheduled 158 * multiple threads. In this case, you must provide (or suitably 159 * #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed 160 * by FREE_DTOA_LOCK(n) for n = 0 or 1. (The second lock, accessed 161 * in pow5mult, ensures lazy evaluation of only one copy of high 162 * powers of 5; omitting this lock would introduce a small 163 * probability of wasting memory, but would otherwise be harmless.) 164 * You must also invoke freedtoa(s) to free the value s returned by 165 * dtoa. You may do so whether or not MULTIPLE_THREADS is #defined. 166 * #define IMPRECISE_INEXACT if you do not care about the setting of 167 * the STRTOG_Inexact bits in the special case of doing IEEE double 168 * precision conversions (which could also be done by the strtod in 169 * dtoa.c). 170 * #define NO_HEX_FP to disable recognition of C9x's hexadecimal 171 * floating-point constants. 172 * #define -DNO_ERRNO to suppress setting errno (in strtod.c and 173 * strtodg.c). 174 * #define NO_STRING_H to use private versions of memcpy. 175 * On some K&R systems, it may also be necessary to 176 * #define DECLARE_SIZE_T in this case. 177 * #define USE_LOCALE to use the current locale's decimal_point value. 178 */ 179 180/* #define IEEE_{BIG,LITTLE}_ENDIAN in ${ARCHDIR}/gdtoa/arith.h */ 181 182#include <stdint.h> 183#define Short int16_t 184#define UShort uint16_t 185#define Long int32_t 186#define ULong uint32_t 187#define LLong int64_t 188#define ULLong uint64_t 189 190#define INFNAN_CHECK 191#ifdef _REENTRANT 192#define MULTIPLE_THREADS 193#endif 194#define USE_LOCALE 195 196#ifndef GDTOAIMP_H_INCLUDED 197#define GDTOAIMP_H_INCLUDED 198#include "gdtoa.h" 199#include "gd_qnan.h" 200#ifdef Honor_FLT_ROUNDS 201#include <fenv.h> 202#endif 203 204#ifdef DEBUG 205#include "stdio.h" 206#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);} 207#endif 208 209#include "stdlib.h" 210#include "string.h" 211 212#ifdef KR_headers 213#define Char char 214#else 215#define Char void 216#endif 217 218#ifdef MALLOC 219extern Char *MALLOC ANSI((size_t)); 220#else 221#define MALLOC malloc 222#endif 223 224#undef IEEE_Arith 225#undef Avoid_Underflow 226#ifdef IEEE_BIG_ENDIAN 227#define IEEE_Arith 228#endif 229#ifdef IEEE_LITTLE_ENDIAN 230#define IEEE_Arith 231#endif 232 233#include "errno.h" 234#ifdef Bad_float_h 235 236#ifdef IEEE_Arith 237#define DBL_DIG 15 238#define DBL_MAX_10_EXP 308 239#define DBL_MAX_EXP 1024 240#define FLT_RADIX 2 241#define DBL_MAX 1.7976931348623157e+308 242#endif 243 244#ifdef IBM 245#define DBL_DIG 16 246#define DBL_MAX_10_EXP 75 247#define DBL_MAX_EXP 63 248#define FLT_RADIX 16 249#define DBL_MAX 7.2370055773322621e+75 250#endif 251 252#ifdef VAX 253#define DBL_DIG 16 254#define DBL_MAX_10_EXP 38 255#define DBL_MAX_EXP 127 256#define FLT_RADIX 2 257#define DBL_MAX 1.7014118346046923e+38 258#define n_bigtens 2 259#endif 260 261#ifndef LONG_MAX 262#define LONG_MAX 2147483647 263#endif 264 265#else /* ifndef Bad_float_h */ 266#include "float.h" 267#endif /* Bad_float_h */ 268 269#ifdef IEEE_Arith 270#define Scale_Bit 0x10 271#define n_bigtens 5 272#endif 273 274#ifdef IBM 275#define n_bigtens 3 276#endif 277 278#ifdef VAX 279#define n_bigtens 2 280#endif 281 282#include "math.h" 283 284#ifdef __cplusplus 285extern "C" { 286#endif 287 288#if defined(IEEE_LITTLE_ENDIAN) + defined(IEEE_BIG_ENDIAN) + defined(VAX) + defined(IBM) != 1 289Exactly one of IEEE_LITTLE_ENDIAN, IEEE_BIG_ENDIAN, VAX, or IBM should be defined. 290#endif 291 292typedef union { double d; ULong L[2]; } __attribute__((__may_alias__)) U; 293 294#ifdef YES_ALIAS 295#define dval(x) x 296#ifdef IEEE_LITTLE_ENDIAN 297#define word0(x) ((ULong *)x)[1] 298#define word1(x) ((ULong *)x)[0] 299#else 300#define word0(x) ((ULong *)x)[0] 301#define word1(x) ((ULong *)x)[1] 302#endif 303#else /* !YES_ALIAS */ 304#ifdef IEEE_LITTLE_ENDIAN 305#define word0(x) ( /* LINTED */ (U*)x)->L[1] 306#define word1(x) ( /* LINTED */ (U*)x)->L[0] 307#else 308#define word0(x) ( /* LINTED */ (U*)x)->L[0] 309#define word1(x) ( /* LINTED */ (U*)x)->L[1] 310#endif 311#define dval(x) ( /* LINTED */ (U*)x)->d 312#endif /* YES_ALIAS */ 313 314/* The following definition of Storeinc is appropriate for MIPS processors. 315 * An alternative that might be better on some machines is 316 * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff) 317 */ 318#if defined(IEEE_LITTLE_ENDIAN) + defined(VAX) 319#define Storeinc(a,b,c) \ 320 (((unsigned short *)(void *)a)[1] = (unsigned short)b, \ 321 ((unsigned short *)(void *)a)[0] = (unsigned short)c, \ 322 a++) 323#else 324#define Storeinc(a,b,c) \ 325 (((unsigned short *)(void *)a)[0] = (unsigned short)b, \ 326 ((unsigned short *)(void *)a)[1] = (unsigned short)c, \ 327 a++) 328#endif 329 330/* #define P DBL_MANT_DIG */ 331/* Ten_pmax = floor(P*log(2)/log(5)) */ 332/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */ 333/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */ 334/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */ 335 336#ifdef IEEE_Arith 337#define Exp_shift 20 338#define Exp_shift1 20 339#define Exp_msk1 0x100000 340#define Exp_msk11 0x100000 341#define Exp_mask 0x7ff00000 342#define P 53 343#define Bias 1023 344#define Emin (-1022) 345#define Exp_1 0x3ff00000 346#define Exp_11 0x3ff00000 347#define Ebits 11 348#define Frac_mask 0xfffff 349#define Frac_mask1 0xfffff 350#define Ten_pmax 22 351#define Bletch 0x10 352#define Bndry_mask 0xfffff 353#define Bndry_mask1 0xfffff 354#define LSB 1 355#define Sign_bit 0x80000000 356#define Log2P 1 357#define Tiny0 0 358#define Tiny1 1 359#define Quick_max 14 360#define Int_max 14 361 362#ifndef Flt_Rounds 363#ifdef FLT_ROUNDS 364#define Flt_Rounds FLT_ROUNDS 365#else 366#define Flt_Rounds 1 367#endif 368#endif /*Flt_Rounds*/ 369 370#else /* ifndef IEEE_Arith */ 371#undef Sudden_Underflow 372#define Sudden_Underflow 373#ifdef IBM 374#undef Flt_Rounds 375#define Flt_Rounds 0 376#define Exp_shift 24 377#define Exp_shift1 24 378#define Exp_msk1 0x1000000 379#define Exp_msk11 0x1000000 380#define Exp_mask 0x7f000000 381#define P 14 382#define Bias 65 383#define Exp_1 0x41000000 384#define Exp_11 0x41000000 385#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */ 386#define Frac_mask 0xffffff 387#define Frac_mask1 0xffffff 388#define Bletch 4 389#define Ten_pmax 22 390#define Bndry_mask 0xefffff 391#define Bndry_mask1 0xffffff 392#define LSB 1 393#define Sign_bit 0x80000000 394#define Log2P 4 395#define Tiny0 0x100000 396#define Tiny1 0 397#define Quick_max 14 398#define Int_max 15 399#else /* VAX */ 400#undef Flt_Rounds 401#define Flt_Rounds 1 402#define Exp_shift 23 403#define Exp_shift1 7 404#define Exp_msk1 0x80 405#define Exp_msk11 0x800000 406#define Exp_mask 0x7f80 407#define P 56 408#define Bias 129 409#define Emin (-127) /* XXX: Check this */ 410#define Exp_1 0x40800000 411#define Exp_11 0x4080 412#define Ebits 8 413#define Frac_mask 0x7fffff 414#define Frac_mask1 0xffff007f 415#define Ten_pmax 24 416#define Bletch 2 417#define Bndry_mask 0xffff007f 418#define Bndry_mask1 0xffff007f 419#define LSB 0x10000 420#define Sign_bit 0x8000 421#define Log2P 1 422#define Tiny0 0x80 423#define Tiny1 0 424#define Quick_max 15 425#define Int_max 15 426#endif /* IBM, VAX */ 427#endif /* IEEE_Arith */ 428 429#ifndef IEEE_Arith 430#define ROUND_BIASED 431#else 432#ifdef ROUND_BIASED_without_Round_Up 433#undef ROUND_BIASED 434#define ROUND_BIASED 435#endif 436#endif 437 438#ifdef RND_PRODQUOT 439#define rounded_product(a,b) a = rnd_prod(a, b) 440#define rounded_quotient(a,b) a = rnd_quot(a, b) 441#ifdef KR_headers 442extern double rnd_prod(), rnd_quot(); 443#else 444extern double rnd_prod(double, double), rnd_quot(double, double); 445#endif 446#else 447#define rounded_product(a,b) a *= b 448#define rounded_quotient(a,b) a /= b 449#endif 450 451#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1)) 452#define Big1 0xffffffff 453 454#undef Pack_16 455#ifndef Pack_32 456#define Pack_32 457#endif 458 459#ifdef NO_LONG_LONG 460#undef ULLong 461#ifdef Just_16 462#undef Pack_32 463#define Pack_16 464/* When Pack_32 is not defined, we store 16 bits per 32-bit Long. 465 * This makes some inner loops simpler and sometimes saves work 466 * during multiplications, but it often seems to make things slightly 467 * slower. Hence the default is now to store 32 bits per Long. 468 */ 469#endif 470#else /* long long available */ 471#ifndef Llong 472#define Llong long long 473#endif 474#ifndef ULLong 475#define ULLong unsigned Llong 476#endif 477#endif /* NO_LONG_LONG */ 478 479#ifdef Pack_32 480#define ULbits 32 481#define kshift 5 482#define kmask 31 483#define ALL_ON 0xffffffff 484#else 485#define ULbits 16 486#define kshift 4 487#define kmask 15 488#define ALL_ON 0xffff 489#endif 490 491#ifndef MULTIPLE_THREADS 492#define ACQUIRE_DTOA_LOCK(n) /*nothing*/ 493#define FREE_DTOA_LOCK(n) /*nothing*/ 494#else 495#include "reentrant.h" 496 497extern mutex_t __gdtoa_locks[2]; 498 499#define ACQUIRE_DTOA_LOCK(n) \ 500 do { \ 501 if (__isthreaded) \ 502 mutex_lock(&__gdtoa_locks[n]); \ 503 } while (/* CONSTCOND */ 0) 504#define FREE_DTOA_LOCK(n) \ 505 do { \ 506 if (__isthreaded) \ 507 mutex_unlock(&__gdtoa_locks[n]); \ 508 } while (/* CONSTCOND */ 0) 509#endif 510 511#define Kmax (sizeof(size_t) << 3) 512 513 struct 514Bigint { 515 struct Bigint *next; 516 int k, maxwds, sign, wds; 517 ULong x[1]; 518 }; 519 520 typedef struct Bigint Bigint; 521 522#ifdef NO_STRING_H 523#ifdef DECLARE_SIZE_T 524typedef unsigned int size_t; 525#endif 526extern void memcpy_D2A ANSI((void*, const void*, size_t)); 527#define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int)) 528#else /* !NO_STRING_H */ 529#define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int)) 530#endif /* NO_STRING_H */ 531 532#define Balloc __Balloc_D2A 533#define Bfree __Bfree_D2A 534#define ULtoQ __ULtoQ_D2A 535#define ULtof __ULtof_D2A 536#define ULtod __ULtod_D2A 537#define ULtodd __ULtodd_D2A 538#define ULtox __ULtox_D2A 539#define ULtoxL __ULtoxL_D2A 540#define any_on __any_on_D2A 541#define b2d __b2d_D2A 542#define bigtens __bigtens_D2A 543#define cmp __cmp_D2A 544#define copybits __copybits_D2A 545#define d2b __d2b_D2A 546#define decrement __decrement_D2A 547#define diff __diff_D2A 548#define dtoa_result __dtoa_result_D2A 549#define g__fmt __g__fmt_D2A 550#define gethex __gethex_D2A 551#define hexdig __hexdig_D2A 552#define hexdig_init_D2A __hexdig_init_D2A 553#define hexnan __hexnan_D2A 554#define hi0bits __hi0bits_D2A 555#define hi0bits_D2A __hi0bits_D2A 556#define i2b __i2b_D2A 557#define increment __increment_D2A 558#define lo0bits __lo0bits_D2A 559#define lshift __lshift_D2A 560#define match __match_D2A 561#define mult __mult_D2A 562#define multadd __multadd_D2A 563#define nrv_alloc __nrv_alloc_D2A 564#define pow5mult __pow5mult_D2A 565#define quorem __quorem_D2A 566#define ratio __ratio_D2A 567#define rshift __rshift_D2A 568#define rv_alloc __rv_alloc_D2A 569#define s2b __s2b_D2A 570#define set_ones __set_ones_D2A 571#define strcp __strcp_D2A 572#define strcp_D2A __strcp_D2A 573#define strtoIg __strtoIg_D2A 574#define sum __sum_D2A 575#define tens __tens_D2A 576#define tinytens __tinytens_D2A 577#define tinytens __tinytens_D2A 578#define trailz __trailz_D2A 579#define ulp __ulp_D2A 580 581 extern char *dtoa_result; 582 extern CONST double bigtens[], tens[], tinytens[]; 583 extern unsigned char hexdig[]; 584 585 extern Bigint *Balloc ANSI((int)); 586 extern void Bfree ANSI((Bigint*)); 587 extern void ULtof ANSI((ULong*, ULong*, Long, int)); 588 extern void ULtod ANSI((ULong*, ULong*, Long, int)); 589 extern void ULtodd ANSI((ULong*, ULong*, Long, int)); 590 extern void ULtoQ ANSI((ULong*, ULong*, Long, int)); 591 extern void ULtox ANSI((UShort*, ULong*, Long, int)); 592 extern void ULtoxL ANSI((ULong*, ULong*, Long, int)); 593 extern ULong any_on ANSI((Bigint*, int)); 594 extern double b2d ANSI((Bigint*, int*)); 595 extern int cmp ANSI((Bigint*, Bigint*)); 596 extern void copybits ANSI((ULong*, int, Bigint*)); 597 extern Bigint *d2b ANSI((double, int*, int*)); 598 extern void decrement ANSI((Bigint*)); 599 extern Bigint *diff ANSI((Bigint*, Bigint*)); 600 extern char *dtoa ANSI((double d, int mode, int ndigits, 601 int *decpt, int *sign, char **rve)); 602 extern char *g__fmt ANSI((char*, char*, char*, int, ULong, size_t)); 603 extern int gethex ANSI((CONST char**, CONST FPI*, Long*, Bigint**, int)); 604 extern void hexdig_init_D2A(Void); 605 extern int hexnan ANSI((CONST char**, CONST FPI*, ULong*)); 606 extern int hi0bits_D2A ANSI((ULong)); 607 extern Bigint *i2b ANSI((int)); 608 extern Bigint *increment ANSI((Bigint*)); 609 extern int lo0bits ANSI((ULong*)); 610 extern Bigint *lshift ANSI((Bigint*, int)); 611 extern int match ANSI((CONST char**, CONST char*)); 612 extern Bigint *mult ANSI((Bigint*, Bigint*)); 613 extern Bigint *multadd ANSI((Bigint*, int, int)); 614 extern char *nrv_alloc ANSI((CONST char*, char **, size_t)); 615 extern Bigint *pow5mult ANSI((Bigint*, int)); 616 extern int quorem ANSI((Bigint*, Bigint*)); 617 extern double ratio ANSI((Bigint*, Bigint*)); 618 extern void rshift ANSI((Bigint*, int)); 619 extern char *rv_alloc ANSI((size_t)); 620 extern Bigint *s2b ANSI((CONST char*, int, int, ULong, int)); 621 extern Bigint *set_ones ANSI((Bigint*, int)); 622 extern char *strcp ANSI((char*, const char*)); 623 extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*)); 624 extern double strtod ANSI((const char *s00, char **se)); 625 extern Bigint *sum ANSI((Bigint*, Bigint*)); 626 extern int trailz ANSI((CONST Bigint*)); 627 extern double ulp ANSI((U*)); 628 629#ifdef __cplusplus 630} 631#endif 632/* 633 * NAN_WORD0 and NAN_WORD1 are only referenced in strtod.c. Prior to 634 * 20050115, they used to be hard-wired here (to 0x7ff80000 and 0, 635 * respectively), but now are determined by compiling and running 636 * qnan.c to generate gd_qnan.h, which specifies d_QNAN0 and d_QNAN1. 637 * Formerly gdtoaimp.h recommended supplying suitable -DNAN_WORD0=... 638 * and -DNAN_WORD1=... values if necessary. This should still work. 639 * (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.) 640 */ 641#ifdef IEEE_Arith 642#ifndef NO_INFNAN_CHECK 643#undef INFNAN_CHECK 644#define INFNAN_CHECK 645#endif 646#ifdef IEEE_BIG_ENDIAN 647#define _0 0 648#define _1 1 649#ifndef NAN_WORD0 650#define NAN_WORD0 d_QNAN0 651#endif 652#ifndef NAN_WORD1 653#define NAN_WORD1 d_QNAN1 654#endif 655#else 656#define _0 1 657#define _1 0 658#ifndef NAN_WORD0 659#define NAN_WORD0 d_QNAN1 660#endif 661#ifndef NAN_WORD1 662#define NAN_WORD1 d_QNAN0 663#endif 664#endif 665#else 666#undef INFNAN_CHECK 667#endif 668 669#undef SI 670#ifdef Sudden_Underflow 671#define SI 1 672#else 673#define SI 0 674#endif 675 676#endif /* GDTOAIMP_H_INCLUDED */ 677