Configure gdtoa for DragonFly:
[dragonfly.git] / contrib / gdtoa / gdtoaimp.h
CommitLineData
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1/****************************************************************
2
3The author of this software is David M. Gay.
4
5Copyright (C) 1998-2000 by Lucent Technologies
6All Rights Reserved
7
8Permission to use, copy, modify, and distribute this software and
9its documentation for any purpose and without fee is hereby
10granted, provided that the above copyright notice appear in all
11copies and that both that the copyright notice and this
12permission notice and warranty disclaimer appear in supporting
13documentation, and that the name of Lucent or any of its entities
14not be used in advertising or publicity pertaining to
15distribution of the software without specific, written prior
16permission.
17
18LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
20IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
21SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
23IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
24ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
25THIS SOFTWARE.
26
27****************************************************************/
28
29/* This is a variation on dtoa.c that converts arbitary binary
30 floating-point formats to and from decimal notation. It uses
31 double-precision arithmetic internally, so there are still
32 various #ifdefs that adapt the calculations to the native
33 double-precision arithmetic (any of IEEE, VAX D_floating,
34 or IBM mainframe arithmetic).
35
36 Please send bug reports to David M. Gay (dmg at acm dot org,
37 with " at " changed at "@" and " dot " changed to ".").
38 */
39
40/* On a machine with IEEE extended-precision registers, it is
41 * necessary to specify double-precision (53-bit) rounding precision
42 * before invoking strtod or dtoa. If the machine uses (the equivalent
43 * of) Intel 80x87 arithmetic, the call
44 * _control87(PC_53, MCW_PC);
45 * does this with many compilers. Whether this or another call is
46 * appropriate depends on the compiler; for this to work, it may be
47 * necessary to #include "float.h" or another system-dependent header
48 * file.
49 */
50
51/* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
52 *
53 * This strtod returns a nearest machine number to the input decimal
54 * string (or sets errno to ERANGE). With IEEE arithmetic, ties are
55 * broken by the IEEE round-even rule. Otherwise ties are broken by
56 * biased rounding (add half and chop).
57 *
58 * Inspired loosely by William D. Clinger's paper "How to Read Floating
59 * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 112-126].
60 *
61 * Modifications:
62 *
63 * 1. We only require IEEE, IBM, or VAX double-precision
64 * arithmetic (not IEEE double-extended).
65 * 2. We get by with floating-point arithmetic in a case that
66 * Clinger missed -- when we're computing d * 10^n
67 * for a small integer d and the integer n is not too
68 * much larger than 22 (the maximum integer k for which
69 * we can represent 10^k exactly), we may be able to
70 * compute (d*10^k) * 10^(e-k) with just one roundoff.
71 * 3. Rather than a bit-at-a-time adjustment of the binary
72 * result in the hard case, we use floating-point
73 * arithmetic to determine the adjustment to within
74 * one bit; only in really hard cases do we need to
75 * compute a second residual.
76 * 4. Because of 3., we don't need a large table of powers of 10
77 * for ten-to-e (just some small tables, e.g. of 10^k
78 * for 0 <= k <= 22).
79 */
80
81/*
82 * #define IEEE_8087 for IEEE-arithmetic machines where the least
83 * significant byte has the lowest address.
84 * #define IEEE_MC68k for IEEE-arithmetic machines where the most
85 * significant byte has the lowest address.
86 * #define Long int on machines with 32-bit ints and 64-bit longs.
87 * #define Sudden_Underflow for IEEE-format machines without gradual
88 * underflow (i.e., that flush to zero on underflow).
89 * #define IBM for IBM mainframe-style floating-point arithmetic.
90 * #define VAX for VAX-style floating-point arithmetic (D_floating).
91 * #define No_leftright to omit left-right logic in fast floating-point
92 * computation of dtoa.
93 * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3.
94 * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
95 * that use extended-precision instructions to compute rounded
96 * products and quotients) with IBM.
97 * #define ROUND_BIASED for IEEE-format with biased rounding.
98 * #define Inaccurate_Divide for IEEE-format with correctly rounded
99 * products but inaccurate quotients, e.g., for Intel i860.
100 * #define NO_LONG_LONG on machines that do not have a "long long"
101 * integer type (of >= 64 bits). On such machines, you can
102 * #define Just_16 to store 16 bits per 32-bit Long when doing
103 * high-precision integer arithmetic. Whether this speeds things
104 * up or slows things down depends on the machine and the number
105 * being converted. If long long is available and the name is
106 * something other than "long long", #define Llong to be the name,
107 * and if "unsigned Llong" does not work as an unsigned version of
108 * Llong, #define #ULLong to be the corresponding unsigned type.
109 * #define KR_headers for old-style C function headers.
110 * #define Bad_float_h if your system lacks a float.h or if it does not
111 * define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
112 * FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
113 * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
114 * if memory is available and otherwise does something you deem
115 * appropriate. If MALLOC is undefined, malloc will be invoked
116 * directly -- and assumed always to succeed.
117 * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
118 * memory allocations from a private pool of memory when possible.
119 * When used, the private pool is PRIVATE_MEM bytes long: 2304 bytes,
120 * unless #defined to be a different length. This default length
121 * suffices to get rid of MALLOC calls except for unusual cases,
122 * such as decimal-to-binary conversion of a very long string of
123 * digits. When converting IEEE double precision values, the
124 * longest string gdtoa can return is about 751 bytes long. For
125 * conversions by strtod of strings of 800 digits and all gdtoa
126 * conversions of IEEE doubles in single-threaded executions with
127 * 8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with
128 * 4-byte pointers, PRIVATE_MEM >= 7112 appears adequate.
129 * #define NO_INFNAN_CHECK if you do not wish to have INFNAN_CHECK
130 * #defined automatically on IEEE systems. On such systems,
131 * when INFNAN_CHECK is #defined, strtod checks
132 * for Infinity and NaN (case insensitively).
133 * When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
134 * strtodg also accepts (case insensitively) strings of the form
135 * NaN(x), where x is a string of hexadecimal digits (optionally
136 * preceded by 0x or 0X) and spaces; if there is only one string
137 * of hexadecimal digits, it is taken for the fraction bits of the
138 * resulting NaN; if there are two or more strings of hexadecimal
139 * digits, each string is assigned to the next available sequence
140 * of 32-bit words of fractions bits (starting with the most
141 * significant), right-aligned in each sequence.
142 * Unless GDTOA_NON_PEDANTIC_NANCHECK is #defined, input "NaN(...)"
143 * is consumed even when ... has the wrong form (in which case the
144 * "(...)" is consumed but ignored).
145 * #define MULTIPLE_THREADS if the system offers preemptively scheduled
146 * multiple threads. In this case, you must provide (or suitably
147 * #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
148 * by FREE_DTOA_LOCK(n) for n = 0 or 1. (The second lock, accessed
149 * in pow5mult, ensures lazy evaluation of only one copy of high
150 * powers of 5; omitting this lock would introduce a small
151 * probability of wasting memory, but would otherwise be harmless.)
152 * You must also invoke freedtoa(s) to free the value s returned by
153 * dtoa. You may do so whether or not MULTIPLE_THREADS is #defined.
154 * #define IMPRECISE_INEXACT if you do not care about the setting of
155 * the STRTOG_Inexact bits in the special case of doing IEEE double
156 * precision conversions (which could also be done by the strtod in
157 * dtoa.c).
158 * #define NO_HEX_FP to disable recognition of C9x's hexadecimal
159 * floating-point constants.
160 * #define -DNO_ERRNO to suppress setting errno (in strtod.c and
161 * strtodg.c).
162 * #define NO_STRING_H to use private versions of memcpy.
163 * On some K&R systems, it may also be necessary to
164 * #define DECLARE_SIZE_T in this case.
165 * #define YES_ALIAS to permit aliasing certain double values with
166 * arrays of ULongs. This leads to slightly better code with
167 * some compilers and was always used prior to 19990916, but it
168 * is not strictly legal and can cause trouble with aggressively
169 * optimizing compilers (e.g., gcc 2.95.1 under -O2).
170 * #define USE_LOCALE to use the current locale's decimal_point value.
171 */
172
173#ifndef GDTOAIMP_H_INCLUDED
174#define GDTOAIMP_H_INCLUDED
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175
176#define Long int
177
178#define USE_LOCALE
179#define Honor_FLT_ROUNDS
180
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181#include "gdtoa.h"
182#include "gd_qnan.h"
183#ifdef Honor_FLT_ROUNDS
184#include <fenv.h>
185#endif
186
187#ifdef DEBUG
188#include "stdio.h"
189#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
190#endif
191
6c3587b9 192#include "limits.h"
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193#include "stdlib.h"
194#include "string.h"
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195#include "libc_private.h"
196
197#include "namespace.h"
198#include <pthread.h>
199#include "un-namespace.h"
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200
201#ifdef KR_headers
202#define Char char
203#else
204#define Char void
205#endif
206
207#ifdef MALLOC
208extern Char *MALLOC ANSI((size_t));
209#else
210#define MALLOC malloc
211#endif
212
213#undef IEEE_Arith
214#undef Avoid_Underflow
215#ifdef IEEE_MC68k
216#define IEEE_Arith
217#endif
218#ifdef IEEE_8087
219#define IEEE_Arith
220#endif
221
222#include "errno.h"
223#ifdef Bad_float_h
224
225#ifdef IEEE_Arith
226#define DBL_DIG 15
227#define DBL_MAX_10_EXP 308
228#define DBL_MAX_EXP 1024
229#define FLT_RADIX 2
230#define DBL_MAX 1.7976931348623157e+308
231#endif
232
233#ifdef IBM
234#define DBL_DIG 16
235#define DBL_MAX_10_EXP 75
236#define DBL_MAX_EXP 63
237#define FLT_RADIX 16
238#define DBL_MAX 7.2370055773322621e+75
239#endif
240
241#ifdef VAX
242#define DBL_DIG 16
243#define DBL_MAX_10_EXP 38
244#define DBL_MAX_EXP 127
245#define FLT_RADIX 2
246#define DBL_MAX 1.7014118346046923e+38
247#define n_bigtens 2
248#endif
249
250#ifndef LONG_MAX
251#define LONG_MAX 2147483647
252#endif
253
254#else /* ifndef Bad_float_h */
255#include "float.h"
256#endif /* Bad_float_h */
257
258#ifdef IEEE_Arith
259#define Scale_Bit 0x10
260#define n_bigtens 5
261#endif
262
263#ifdef IBM
264#define n_bigtens 3
265#endif
266
267#ifdef VAX
268#define n_bigtens 2
269#endif
270
271#ifndef __MATH_H__
272#include "math.h"
273#endif
274
275#ifdef __cplusplus
276extern "C" {
277#endif
278
279#if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(VAX) + defined(IBM) != 1
280Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
281#endif
282
283typedef union { double d; ULong L[2]; } U;
284
285#ifdef YES_ALIAS
286#define dval(x) x
287#ifdef IEEE_8087
288#define word0(x) ((ULong *)&x)[1]
289#define word1(x) ((ULong *)&x)[0]
290#else
291#define word0(x) ((ULong *)&x)[0]
292#define word1(x) ((ULong *)&x)[1]
293#endif
294#else /* !YES_ALIAS */
295#ifdef IEEE_8087
296#define word0(x) ((U*)&x)->L[1]
297#define word1(x) ((U*)&x)->L[0]
298#else
299#define word0(x) ((U*)&x)->L[0]
300#define word1(x) ((U*)&x)->L[1]
301#endif
302#define dval(x) ((U*)&x)->d
303#endif /* YES_ALIAS */
304
305/* The following definition of Storeinc is appropriate for MIPS processors.
306 * An alternative that might be better on some machines is
307 * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
308 */
309#if defined(IEEE_8087) + defined(VAX)
310#define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
311((unsigned short *)a)[0] = (unsigned short)c, a++)
312#else
313#define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
314((unsigned short *)a)[1] = (unsigned short)c, a++)
315#endif
316
317/* #define P DBL_MANT_DIG */
318/* Ten_pmax = floor(P*log(2)/log(5)) */
319/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
320/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
321/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
322
323#ifdef IEEE_Arith
324#define Exp_shift 20
325#define Exp_shift1 20
326#define Exp_msk1 0x100000
327#define Exp_msk11 0x100000
328#define Exp_mask 0x7ff00000
329#define P 53
330#define Bias 1023
331#define Emin (-1022)
332#define Exp_1 0x3ff00000
333#define Exp_11 0x3ff00000
334#define Ebits 11
335#define Frac_mask 0xfffff
336#define Frac_mask1 0xfffff
337#define Ten_pmax 22
338#define Bletch 0x10
339#define Bndry_mask 0xfffff
340#define Bndry_mask1 0xfffff
341#define LSB 1
342#define Sign_bit 0x80000000
343#define Log2P 1
344#define Tiny0 0
345#define Tiny1 1
346#define Quick_max 14
347#define Int_max 14
348
349#ifndef Flt_Rounds
350#ifdef FLT_ROUNDS
351#define Flt_Rounds FLT_ROUNDS
352#else
353#define Flt_Rounds 1
354#endif
355#endif /*Flt_Rounds*/
356
357#else /* ifndef IEEE_Arith */
358#undef Sudden_Underflow
359#define Sudden_Underflow
360#ifdef IBM
361#undef Flt_Rounds
362#define Flt_Rounds 0
363#define Exp_shift 24
364#define Exp_shift1 24
365#define Exp_msk1 0x1000000
366#define Exp_msk11 0x1000000
367#define Exp_mask 0x7f000000
368#define P 14
369#define Bias 65
370#define Exp_1 0x41000000
371#define Exp_11 0x41000000
372#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
373#define Frac_mask 0xffffff
374#define Frac_mask1 0xffffff
375#define Bletch 4
376#define Ten_pmax 22
377#define Bndry_mask 0xefffff
378#define Bndry_mask1 0xffffff
379#define LSB 1
380#define Sign_bit 0x80000000
381#define Log2P 4
382#define Tiny0 0x100000
383#define Tiny1 0
384#define Quick_max 14
385#define Int_max 15
386#else /* VAX */
387#undef Flt_Rounds
388#define Flt_Rounds 1
389#define Exp_shift 23
390#define Exp_shift1 7
391#define Exp_msk1 0x80
392#define Exp_msk11 0x800000
393#define Exp_mask 0x7f80
394#define P 56
395#define Bias 129
396#define Exp_1 0x40800000
397#define Exp_11 0x4080
398#define Ebits 8
399#define Frac_mask 0x7fffff
400#define Frac_mask1 0xffff007f
401#define Ten_pmax 24
402#define Bletch 2
403#define Bndry_mask 0xffff007f
404#define Bndry_mask1 0xffff007f
405#define LSB 0x10000
406#define Sign_bit 0x8000
407#define Log2P 1
408#define Tiny0 0x80
409#define Tiny1 0
410#define Quick_max 15
411#define Int_max 15
412#endif /* IBM, VAX */
413#endif /* IEEE_Arith */
414
415#ifndef IEEE_Arith
416#define ROUND_BIASED
417#endif
418
419#ifdef RND_PRODQUOT
420#define rounded_product(a,b) a = rnd_prod(a, b)
421#define rounded_quotient(a,b) a = rnd_quot(a, b)
422#ifdef KR_headers
423extern double rnd_prod(), rnd_quot();
424#else
425extern double rnd_prod(double, double), rnd_quot(double, double);
426#endif
427#else
428#define rounded_product(a,b) a *= b
429#define rounded_quotient(a,b) a /= b
430#endif
431
432#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
433#define Big1 0xffffffff
434
435#undef Pack_16
436#ifndef Pack_32
437#define Pack_32
438#endif
439
440#ifdef NO_LONG_LONG
441#undef ULLong
442#ifdef Just_16
443#undef Pack_32
444#define Pack_16
445/* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
446 * This makes some inner loops simpler and sometimes saves work
447 * during multiplications, but it often seems to make things slightly
448 * slower. Hence the default is now to store 32 bits per Long.
449 */
450#endif
451#else /* long long available */
452#ifndef Llong
453#define Llong long long
454#endif
455#ifndef ULLong
456#define ULLong unsigned Llong
457#endif
458#endif /* NO_LONG_LONG */
459
460#ifdef Pack_32
461#define ULbits 32
462#define kshift 5
463#define kmask 31
464#define ALL_ON 0xffffffff
465#else
466#define ULbits 16
467#define kshift 4
468#define kmask 15
469#define ALL_ON 0xffff
470#endif
471
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472#define MULTIPLE_THREADS
473extern pthread_mutex_t __gdtoa_locks[2];
474#define ACQUIRE_DTOA_LOCK(n) do { \
475 if (__isthreaded) \
476 _pthread_mutex_lock(&__gdtoa_locks[n]); \
477} while(0)
478#define FREE_DTOA_LOCK(n) do { \
479 if (__isthreaded) \
480 _pthread_mutex_unlock(&__gdtoa_locks[n]); \
481} while(0)
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482
483#define Kmax 15
484
485 struct
486Bigint {
487 struct Bigint *next;
488 int k, maxwds, sign, wds;
489 ULong x[1];
490 };
491
492 typedef struct Bigint Bigint;
493
494#ifdef NO_STRING_H
495#ifdef DECLARE_SIZE_T
496typedef unsigned int size_t;
497#endif
498extern void memcpy_D2A ANSI((void*, const void*, size_t));
499#define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
500#else /* !NO_STRING_H */
501#define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
502#endif /* NO_STRING_H */
503
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504/*
505 * Paranoia: Protect exported symbols, including ones in files we don't
506 * compile right now. The standard strtof and strtod survive.
507 */
508#define dtoa __dtoa
509#define gdtoa __gdtoa
510#define freedtoa __freedtoa
511#define strtodg __strtodg
512#define g_ddfmt __g_ddfmt
513#define g_dfmt __g_dfmt
514#define g_ffmt __g_ffmt
515#define g_Qfmt __g_Qfmt
516#define g_xfmt __g_xfmt
517#define g_xLfmt __g_xLfmt
518#define strtoId __strtoId
519#define strtoIdd __strtoIdd
520#define strtoIf __strtoIf
521#define strtoIQ __strtoIQ
522#define strtoIx __strtoIx
523#define strtoIxL __strtoIxL
524#define strtord __strtord
525#define strtordd __strtordd
526#define strtorf __strtorf
527#define strtorQ __strtorQ
528#define strtorx __strtorx
529#define strtorxL __strtorxL
530#define strtodI __strtodI
531#define strtopd __strtopd
532#define strtopdd __strtopdd
533#define strtopf __strtopf
534#define strtopQ __strtopQ
535#define strtopx __strtopx
536#define strtopxL __strtopxL
537
538/* Protect gdtoa-internal symbols */
539#define Balloc __Balloc_D2A
540#define Bfree __Bfree_D2A
541#define ULtoQ __ULtoQ_D2A
542#define ULtof __ULtof_D2A
543#define ULtod __ULtod_D2A
544#define ULtodd __ULtodd_D2A
545#define ULtox __ULtox_D2A
546#define ULtoxL __ULtoxL_D2A
547#define any_on __any_on_D2A
548#define b2d __b2d_D2A
549#define bigtens __bigtens_D2A
550#define cmp __cmp_D2A
551#define copybits __copybits_D2A
552#define d2b __d2b_D2A
553#define decrement __decrement_D2A
554#define diff __diff_D2A
555#define dtoa_result __dtoa_result_D2A
556#define g__fmt __g__fmt_D2A
557#define gethex __gethex_D2A
558#define hexdig __hexdig_D2A
559#define hexdig_init_D2A __hexdig_init_D2A
560#define hexnan __hexnan_D2A
561#define hi0bits(x) __hi0bits_D2A((ULong)(x))
562#define hi0bits_D2A __hi0bits_D2A
563#define i2b __i2b_D2A
564#define increment __increment_D2A
565#define lo0bits __lo0bits_D2A
566#define lshift __lshift_D2A
567#define match __match_D2A
568#define mult __mult_D2A
569#define multadd __multadd_D2A
570#define nrv_alloc __nrv_alloc_D2A
571#define pow5mult __pow5mult_D2A
572#define quorem __quorem_D2A
573#define ratio __ratio_D2A
574#define rshift __rshift_D2A
575#define rv_alloc __rv_alloc_D2A
576#define s2b __s2b_D2A
577#define set_ones __set_ones_D2A
578#define strcp __strcp_D2A
579#define strcp_D2A __strcp_D2A
580#define strtoIg __strtoIg_D2A
581#define sum __sum_D2A
582#define tens __tens_D2A
583#define tinytens __tinytens_D2A
584#define tinytens __tinytens_D2A
585#define trailz __trailz_D2A
586#define ulp __ulp_D2A
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587
588 extern char *dtoa_result;
589 extern CONST double bigtens[], tens[], tinytens[];
590 extern unsigned char hexdig[];
591
592 extern Bigint *Balloc ANSI((int));
593 extern void Bfree ANSI((Bigint*));
594 extern void ULtof ANSI((ULong*, ULong*, Long, int));
595 extern void ULtod ANSI((ULong*, ULong*, Long, int));
596 extern void ULtodd ANSI((ULong*, ULong*, Long, int));
597 extern void ULtoQ ANSI((ULong*, ULong*, Long, int));
598 extern void ULtox ANSI((UShort*, ULong*, Long, int));
599 extern void ULtoxL ANSI((ULong*, ULong*, Long, int));
600 extern ULong any_on ANSI((Bigint*, int));
601 extern double b2d ANSI((Bigint*, int*));
602 extern int cmp ANSI((Bigint*, Bigint*));
603 extern void copybits ANSI((ULong*, int, Bigint*));
604 extern Bigint *d2b ANSI((double, int*, int*));
605 extern void decrement ANSI((Bigint*));
606 extern Bigint *diff ANSI((Bigint*, Bigint*));
607 extern char *dtoa ANSI((double d, int mode, int ndigits,
608 int *decpt, int *sign, char **rve));
6c3587b9 609 extern void freedtoa ANSI((char*));
1181b21f 610 extern char *g__fmt ANSI((char*, char*, char*, int, ULong, size_t));
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611 extern char *gdtoa ANSI((FPI *fpi, int be, ULong *bits, int *kindp,
612 int mode, int ndigits, int *decpt, char **rve));
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613 extern int gethex ANSI((CONST char**, FPI*, Long*, Bigint**, int));
614 extern void hexdig_init_D2A(Void);
615 extern int hexnan ANSI((CONST char**, FPI*, ULong*));
616 extern int hi0bits_D2A ANSI((ULong));
617 extern Bigint *i2b ANSI((int));
618 extern Bigint *increment ANSI((Bigint*));
619 extern int lo0bits ANSI((ULong*));
620 extern Bigint *lshift ANSI((Bigint*, int));
621 extern int match ANSI((CONST char**, char*));
622 extern Bigint *mult ANSI((Bigint*, Bigint*));
623 extern Bigint *multadd ANSI((Bigint*, int, int));
624 extern char *nrv_alloc ANSI((char*, char **, int));
625 extern Bigint *pow5mult ANSI((Bigint*, int));
626 extern int quorem ANSI((Bigint*, Bigint*));
627 extern double ratio ANSI((Bigint*, Bigint*));
628 extern void rshift ANSI((Bigint*, int));
629 extern char *rv_alloc ANSI((int));
630 extern Bigint *s2b ANSI((CONST char*, int, int, ULong, int));
631 extern Bigint *set_ones ANSI((Bigint*, int));
632 extern char *strcp ANSI((char*, const char*));
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633 extern int strtodg ANSI((CONST char*, char**, FPI*, Long*, ULong*));
634
635 extern int strtoId ANSI((CONST char *, char **, double *, double *));
636 extern int strtoIdd ANSI((CONST char *, char **, double *, double *));
637 extern int strtoIf ANSI((CONST char *, char **, float *, float *));
1181b21f 638 extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*));
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639 extern int strtoIQ ANSI((CONST char *, char **, void *, void *));
640 extern int strtoIx ANSI((CONST char *, char **, void *, void *));
641 extern int strtoIxL ANSI((CONST char *, char **, void *, void *));
1181b21f 642 extern double strtod ANSI((const char *s00, char **se));
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643 extern int strtopQ ANSI((CONST char *, char **, Void *));
644 extern int strtopf ANSI((CONST char *, char **, float *));
645 extern int strtopd ANSI((CONST char *, char **, double *));
646 extern int strtopdd ANSI((CONST char *, char **, double *));
647 extern int strtopx ANSI((CONST char *, char **, Void *));
648 extern int strtopxL ANSI((CONST char *, char **, Void *));
649 extern int strtord ANSI((CONST char *, char **, int, double *));
650 extern int strtordd ANSI((CONST char *, char **, int, double *));
651 extern int strtorf ANSI((CONST char *, char **, int, float *));
652 extern int strtorQ ANSI((CONST char *, char **, int, void *));
653 extern int strtorx ANSI((CONST char *, char **, int, void *));
654 extern int strtorxL ANSI((CONST char *, char **, int, void *));
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655 extern Bigint *sum ANSI((Bigint*, Bigint*));
656 extern int trailz ANSI((Bigint*));
657 extern double ulp ANSI((double));
658
659#ifdef __cplusplus
660}
661#endif
662/*
663 * NAN_WORD0 and NAN_WORD1 are only referenced in strtod.c. Prior to
664 * 20050115, they used to be hard-wired here (to 0x7ff80000 and 0,
665 * respectively), but now are determined by compiling and running
666 * qnan.c to generate gd_qnan.h, which specifies d_QNAN0 and d_QNAN1.
667 * Formerly gdtoaimp.h recommended supplying suitable -DNAN_WORD0=...
668 * and -DNAN_WORD1=... values if necessary. This should still work.
669 * (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
670 */
671#ifdef IEEE_Arith
672#ifndef NO_INFNAN_CHECK
673#undef INFNAN_CHECK
674#define INFNAN_CHECK
675#endif
676#ifdef IEEE_MC68k
677#define _0 0
678#define _1 1
679#ifndef NAN_WORD0
680#define NAN_WORD0 d_QNAN0
681#endif
682#ifndef NAN_WORD1
683#define NAN_WORD1 d_QNAN1
684#endif
685#else
686#define _0 1
687#define _1 0
688#ifndef NAN_WORD0
689#define NAN_WORD0 d_QNAN1
690#endif
691#ifndef NAN_WORD1
692#define NAN_WORD1 d_QNAN0
693#endif
694#endif
695#else
696#undef INFNAN_CHECK
697#endif
698
699#undef SI
700#ifdef Sudden_Underflow
701#define SI 1
702#else
703#define SI 0
704#endif
705
706#endif /* GDTOAIMP_H_INCLUDED */