1 /* Copyright (C) 2002-2020 Free Software Foundation, Inc.
2 
3 This file is part of GCC.
4 
5 GCC is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3, or (at your option)
8 any later version.
9 
10 GCC is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 GNU General Public License for more details.
14 
15 Under Section 7 of GPL version 3, you are granted additional
16 permissions described in the GCC Runtime Library Exception, version
17 3.1, as published by the Free Software Foundation.
18 
19 You should have received a copy of the GNU General Public License and
20 a copy of the GCC Runtime Library Exception along with this program;
21 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
22 <http://www.gnu.org/licenses/>.  */
23 
24 /*
25  * ISO C Standard:  5.2.4.2.2  Characteristics of floating types <float.h>
26  */
27 
28 #ifndef _FLOAT_H___
29 #define _FLOAT_H___
30 
31 /* Radix of exponent representation, b. */
32 #undef FLT_RADIX
33 #define FLT_RADIX	__FLT_RADIX__
34 
35 /* Number of base-FLT_RADIX digits in the significand, p.  */
36 #undef FLT_MANT_DIG
37 #undef DBL_MANT_DIG
38 #undef LDBL_MANT_DIG
39 #define FLT_MANT_DIG	__FLT_MANT_DIG__
40 #define DBL_MANT_DIG	__DBL_MANT_DIG__
41 #define LDBL_MANT_DIG	__LDBL_MANT_DIG__
42 
43 /* Number of decimal digits, q, such that any floating-point number with q
44    decimal digits can be rounded into a floating-point number with p radix b
45    digits and back again without change to the q decimal digits,
46 
47 	p * log10(b)			if b is a power of 10
48 	floor((p - 1) * log10(b))	otherwise
49 */
50 #undef FLT_DIG
51 #undef DBL_DIG
52 #undef LDBL_DIG
53 #define FLT_DIG		__FLT_DIG__
54 #define DBL_DIG		__DBL_DIG__
55 #define LDBL_DIG	__LDBL_DIG__
56 
57 /* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
58 #undef FLT_MIN_EXP
59 #undef DBL_MIN_EXP
60 #undef LDBL_MIN_EXP
61 #define FLT_MIN_EXP	__FLT_MIN_EXP__
62 #define DBL_MIN_EXP	__DBL_MIN_EXP__
63 #define LDBL_MIN_EXP	__LDBL_MIN_EXP__
64 
65 /* Minimum negative integer such that 10 raised to that power is in the
66    range of normalized floating-point numbers,
67 
68 	ceil(log10(b) * (emin - 1))
69 */
70 #undef FLT_MIN_10_EXP
71 #undef DBL_MIN_10_EXP
72 #undef LDBL_MIN_10_EXP
73 #define FLT_MIN_10_EXP	__FLT_MIN_10_EXP__
74 #define DBL_MIN_10_EXP	__DBL_MIN_10_EXP__
75 #define LDBL_MIN_10_EXP	__LDBL_MIN_10_EXP__
76 
77 /* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax.  */
78 #undef FLT_MAX_EXP
79 #undef DBL_MAX_EXP
80 #undef LDBL_MAX_EXP
81 #define FLT_MAX_EXP	__FLT_MAX_EXP__
82 #define DBL_MAX_EXP	__DBL_MAX_EXP__
83 #define LDBL_MAX_EXP	__LDBL_MAX_EXP__
84 
85 /* Maximum integer such that 10 raised to that power is in the range of
86    representable finite floating-point numbers,
87 
88 	floor(log10((1 - b**-p) * b**emax))
89 */
90 #undef FLT_MAX_10_EXP
91 #undef DBL_MAX_10_EXP
92 #undef LDBL_MAX_10_EXP
93 #define FLT_MAX_10_EXP	__FLT_MAX_10_EXP__
94 #define DBL_MAX_10_EXP	__DBL_MAX_10_EXP__
95 #define LDBL_MAX_10_EXP	__LDBL_MAX_10_EXP__
96 
97 /* Maximum representable finite floating-point number,
98 
99 	(1 - b**-p) * b**emax
100 */
101 #undef FLT_MAX
102 #undef DBL_MAX
103 #undef LDBL_MAX
104 #define FLT_MAX		__FLT_MAX__
105 #define DBL_MAX		__DBL_MAX__
106 #define LDBL_MAX	__LDBL_MAX__
107 
108 /* The difference between 1 and the least value greater than 1 that is
109    representable in the given floating point type, b**1-p.  */
110 #undef FLT_EPSILON
111 #undef DBL_EPSILON
112 #undef LDBL_EPSILON
113 #define FLT_EPSILON	__FLT_EPSILON__
114 #define DBL_EPSILON	__DBL_EPSILON__
115 #define LDBL_EPSILON	__LDBL_EPSILON__
116 
117 /* Minimum normalized positive floating-point number, b**(emin - 1).  */
118 #undef FLT_MIN
119 #undef DBL_MIN
120 #undef LDBL_MIN
121 #define FLT_MIN		__FLT_MIN__
122 #define DBL_MIN		__DBL_MIN__
123 #define LDBL_MIN	__LDBL_MIN__
124 
125 /* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown.  */
126 /* ??? This is supposed to change with calls to fesetround in <fenv.h>.  */
127 #undef FLT_ROUNDS
128 #define FLT_ROUNDS 1
129 
130 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
131      || (defined (__cplusplus) && __cplusplus >= 201103L)
132 /* The floating-point expression evaluation method.  The precise
133    definitions of these values are generalised to include support for
134    the interchange and extended types defined in ISO/IEC TS 18661-3.
135    Prior to this (for C99/C11) the definitions were:
136 
137 	-1  indeterminate
138 	 0  evaluate all operations and constants just to the range and
139 	    precision of the type
140 	 1  evaluate operations and constants of type float and double
141 	    to the range and precision of the double type, evaluate
142 	    long double operations and constants to the range and
143 	    precision of the long double type
144 	 2  evaluate all operations and constants to the range and
145 	    precision of the long double type
146 
147    The TS 18661-3 definitions are:
148 
149 	-1  indeterminate
150 	 0  evaluate all operations and constants, whose semantic type has
151 	    at most the range and precision of float, to the range and
152 	    precision of float; evaluate all other operations and constants
153 	    to the range and precision of the semantic type.
154 	 1  evaluate all operations and constants, whose semantic type has
155 	    at most the range and precision of double, to the range and
156 	    precision of double; evaluate all other operations and constants
157 	    to the range and precision of the semantic type.
158 	 2  evaluate all operations and constants, whose semantic type has
159 	    at most the range and precision of long double, to the range and
160 	    precision of long double; evaluate all other operations and
161 	    constants to the range and precision of the semantic type.
162 	 N  where _FloatN  is a supported interchange floating type
163 	    evaluate all operations and constants, whose semantic type has
164 	    at most the range and precision of the _FloatN type, to the
165 	    range and precision of the _FloatN type; evaluate all other
166 	    operations and constants to the range and precision of the
167 	    semantic type.
168 	 N + 1, where _FloatNx is a supported extended floating type
169 	    evaluate operations and constants, whose semantic type has at
170 	    most the range and precision of the _FloatNx type, to the range
171 	    and precision of the _FloatNx type; evaluate all other
172 	    operations and constants to the range and precision of the
173 	    semantic type.
174 
175    The compiler predefines two macros:
176 
177       __FLT_EVAL_METHOD__
178       Which, depending on the value given for
179       -fpermitted-flt-eval-methods, may be limited to only those values
180       for FLT_EVAL_METHOD defined in C99/C11.
181 
182      __FLT_EVAL_METHOD_TS_18661_3__
183       Which always permits the values for FLT_EVAL_METHOD defined in
184       ISO/IEC TS 18661-3.
185 
186      Here we want to use __FLT_EVAL_METHOD__, unless
187      __STDC_WANT_IEC_60559_TYPES_EXT__ is defined, in which case the user
188      is specifically asking for the ISO/IEC TS 18661-3 types, so we use
189      __FLT_EVAL_METHOD_TS_18661_3__.
190 
191    ??? This ought to change with the setting of the fp control word;
192    the value provided by the compiler assumes the widest setting.  */
193 #undef FLT_EVAL_METHOD
194 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
195 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD_TS_18661_3__
196 #else
197 #define FLT_EVAL_METHOD	__FLT_EVAL_METHOD__
198 #endif
199 
200 /* Number of decimal digits, n, such that any floating-point number in the
201    widest supported floating type with pmax radix b digits can be rounded
202    to a floating-point number with n decimal digits and back again without
203    change to the value,
204 
205 	pmax * log10(b)			if b is a power of 10
206 	ceil(1 + pmax * log10(b))	otherwise
207 */
208 #undef DECIMAL_DIG
209 #define DECIMAL_DIG	__DECIMAL_DIG__
210 
211 #endif /* C99 */
212 
213 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
214      || (defined (__cplusplus) && __cplusplus >= 201703L)
215 /* Versions of DECIMAL_DIG for each floating-point type.  */
216 #undef FLT_DECIMAL_DIG
217 #undef DBL_DECIMAL_DIG
218 #undef LDBL_DECIMAL_DIG
219 #define FLT_DECIMAL_DIG		__FLT_DECIMAL_DIG__
220 #define DBL_DECIMAL_DIG		__DBL_DECIMAL_DIG__
221 #define LDBL_DECIMAL_DIG	__LDBL_DECIMAL_DIG__
222 
223 /* Whether types support subnormal numbers.  */
224 #undef FLT_HAS_SUBNORM
225 #undef DBL_HAS_SUBNORM
226 #undef LDBL_HAS_SUBNORM
227 #define FLT_HAS_SUBNORM		__FLT_HAS_DENORM__
228 #define DBL_HAS_SUBNORM		__DBL_HAS_DENORM__
229 #define LDBL_HAS_SUBNORM	__LDBL_HAS_DENORM__
230 
231 /* Minimum positive values, including subnormals.  */
232 #undef FLT_TRUE_MIN
233 #undef DBL_TRUE_MIN
234 #undef LDBL_TRUE_MIN
235 #define FLT_TRUE_MIN	__FLT_DENORM_MIN__
236 #define DBL_TRUE_MIN	__DBL_DENORM_MIN__
237 #define LDBL_TRUE_MIN	__LDBL_DENORM_MIN__
238 
239 #endif /* C11 */
240 
241 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L
242 /* Maximum finite positive value with MANT_DIG digits in the
243    significand taking their maximum value.  */
244 #undef FLT_NORM_MAX
245 #undef DBL_NORM_MAX
246 #undef LDBL_NORM_MAX
247 #define FLT_NORM_MAX	__FLT_NORM_MAX__
248 #define DBL_NORM_MAX	__DBL_NORM_MAX__
249 #define LDBL_NORM_MAX	__LDBL_NORM_MAX__
250 
251 #endif /* C2X */
252 
253 #ifdef __STDC_WANT_IEC_60559_BFP_EXT__
254 /* Number of decimal digits for which conversions between decimal
255    character strings and binary formats, in both directions, are
256    correctly rounded.  */
257 #define CR_DECIMAL_DIG	__UINTMAX_MAX__
258 #endif
259 
260 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
261 /* Constants for _FloatN and _FloatNx types from TS 18661-3.  See
262    comments above for their semantics.  */
263 
264 #ifdef __FLT16_MANT_DIG__
265 #undef FLT16_MANT_DIG
266 #define FLT16_MANT_DIG		__FLT16_MANT_DIG__
267 #undef FLT16_DIG
268 #define FLT16_DIG		__FLT16_DIG__
269 #undef FLT16_MIN_EXP
270 #define FLT16_MIN_EXP		__FLT16_MIN_EXP__
271 #undef FLT16_MIN_10_EXP
272 #define FLT16_MIN_10_EXP	__FLT16_MIN_10_EXP__
273 #undef FLT16_MAX_EXP
274 #define FLT16_MAX_EXP		__FLT16_MAX_EXP__
275 #undef FLT16_MAX_10_EXP
276 #define FLT16_MAX_10_EXP	__FLT16_MAX_10_EXP__
277 #undef FLT16_MAX
278 #define FLT16_MAX		__FLT16_MAX__
279 #undef FLT16_EPSILON
280 #define FLT16_EPSILON		__FLT16_EPSILON__
281 #undef FLT16_MIN
282 #define FLT16_MIN		__FLT16_MIN__
283 #undef FLT16_DECIMAL_DIG
284 #define FLT16_DECIMAL_DIG	__FLT16_DECIMAL_DIG__
285 #undef FLT16_TRUE_MIN
286 #define FLT16_TRUE_MIN		__FLT16_DENORM_MIN__
287 #endif /* __FLT16_MANT_DIG__.  */
288 
289 #ifdef __FLT32_MANT_DIG__
290 #undef FLT32_MANT_DIG
291 #define FLT32_MANT_DIG		__FLT32_MANT_DIG__
292 #undef FLT32_DIG
293 #define FLT32_DIG		__FLT32_DIG__
294 #undef FLT32_MIN_EXP
295 #define FLT32_MIN_EXP		__FLT32_MIN_EXP__
296 #undef FLT32_MIN_10_EXP
297 #define FLT32_MIN_10_EXP	__FLT32_MIN_10_EXP__
298 #undef FLT32_MAX_EXP
299 #define FLT32_MAX_EXP		__FLT32_MAX_EXP__
300 #undef FLT32_MAX_10_EXP
301 #define FLT32_MAX_10_EXP	__FLT32_MAX_10_EXP__
302 #undef FLT32_MAX
303 #define FLT32_MAX		__FLT32_MAX__
304 #undef FLT32_EPSILON
305 #define FLT32_EPSILON		__FLT32_EPSILON__
306 #undef FLT32_MIN
307 #define FLT32_MIN		__FLT32_MIN__
308 #undef FLT32_DECIMAL_DIG
309 #define FLT32_DECIMAL_DIG	__FLT32_DECIMAL_DIG__
310 #undef FLT32_TRUE_MIN
311 #define FLT32_TRUE_MIN		__FLT32_DENORM_MIN__
312 #endif /* __FLT32_MANT_DIG__.  */
313 
314 #ifdef __FLT64_MANT_DIG__
315 #undef FLT64_MANT_DIG
316 #define FLT64_MANT_DIG		__FLT64_MANT_DIG__
317 #undef FLT64_DIG
318 #define FLT64_DIG		__FLT64_DIG__
319 #undef FLT64_MIN_EXP
320 #define FLT64_MIN_EXP		__FLT64_MIN_EXP__
321 #undef FLT64_MIN_10_EXP
322 #define FLT64_MIN_10_EXP	__FLT64_MIN_10_EXP__
323 #undef FLT64_MAX_EXP
324 #define FLT64_MAX_EXP		__FLT64_MAX_EXP__
325 #undef FLT64_MAX_10_EXP
326 #define FLT64_MAX_10_EXP	__FLT64_MAX_10_EXP__
327 #undef FLT64_MAX
328 #define FLT64_MAX		__FLT64_MAX__
329 #undef FLT64_EPSILON
330 #define FLT64_EPSILON		__FLT64_EPSILON__
331 #undef FLT64_MIN
332 #define FLT64_MIN		__FLT64_MIN__
333 #undef FLT64_DECIMAL_DIG
334 #define FLT64_DECIMAL_DIG	__FLT64_DECIMAL_DIG__
335 #undef FLT64_TRUE_MIN
336 #define FLT64_TRUE_MIN		__FLT64_DENORM_MIN__
337 #endif /* __FLT64_MANT_DIG__.  */
338 
339 #ifdef __FLT128_MANT_DIG__
340 #undef FLT128_MANT_DIG
341 #define FLT128_MANT_DIG		__FLT128_MANT_DIG__
342 #undef FLT128_DIG
343 #define FLT128_DIG		__FLT128_DIG__
344 #undef FLT128_MIN_EXP
345 #define FLT128_MIN_EXP		__FLT128_MIN_EXP__
346 #undef FLT128_MIN_10_EXP
347 #define FLT128_MIN_10_EXP	__FLT128_MIN_10_EXP__
348 #undef FLT128_MAX_EXP
349 #define FLT128_MAX_EXP		__FLT128_MAX_EXP__
350 #undef FLT128_MAX_10_EXP
351 #define FLT128_MAX_10_EXP	__FLT128_MAX_10_EXP__
352 #undef FLT128_MAX
353 #define FLT128_MAX		__FLT128_MAX__
354 #undef FLT128_EPSILON
355 #define FLT128_EPSILON		__FLT128_EPSILON__
356 #undef FLT128_MIN
357 #define FLT128_MIN		__FLT128_MIN__
358 #undef FLT128_DECIMAL_DIG
359 #define FLT128_DECIMAL_DIG	__FLT128_DECIMAL_DIG__
360 #undef FLT128_TRUE_MIN
361 #define FLT128_TRUE_MIN		__FLT128_DENORM_MIN__
362 #endif /* __FLT128_MANT_DIG__.  */
363 
364 #ifdef __FLT32X_MANT_DIG__
365 #undef FLT32X_MANT_DIG
366 #define FLT32X_MANT_DIG		__FLT32X_MANT_DIG__
367 #undef FLT32X_DIG
368 #define FLT32X_DIG		__FLT32X_DIG__
369 #undef FLT32X_MIN_EXP
370 #define FLT32X_MIN_EXP		__FLT32X_MIN_EXP__
371 #undef FLT32X_MIN_10_EXP
372 #define FLT32X_MIN_10_EXP	__FLT32X_MIN_10_EXP__
373 #undef FLT32X_MAX_EXP
374 #define FLT32X_MAX_EXP		__FLT32X_MAX_EXP__
375 #undef FLT32X_MAX_10_EXP
376 #define FLT32X_MAX_10_EXP	__FLT32X_MAX_10_EXP__
377 #undef FLT32X_MAX
378 #define FLT32X_MAX		__FLT32X_MAX__
379 #undef FLT32X_EPSILON
380 #define FLT32X_EPSILON		__FLT32X_EPSILON__
381 #undef FLT32X_MIN
382 #define FLT32X_MIN		__FLT32X_MIN__
383 #undef FLT32X_DECIMAL_DIG
384 #define FLT32X_DECIMAL_DIG	__FLT32X_DECIMAL_DIG__
385 #undef FLT32X_TRUE_MIN
386 #define FLT32X_TRUE_MIN		__FLT32X_DENORM_MIN__
387 #endif /* __FLT32X_MANT_DIG__.  */
388 
389 #ifdef __FLT64X_MANT_DIG__
390 #undef FLT64X_MANT_DIG
391 #define FLT64X_MANT_DIG		__FLT64X_MANT_DIG__
392 #undef FLT64X_DIG
393 #define FLT64X_DIG		__FLT64X_DIG__
394 #undef FLT64X_MIN_EXP
395 #define FLT64X_MIN_EXP		__FLT64X_MIN_EXP__
396 #undef FLT64X_MIN_10_EXP
397 #define FLT64X_MIN_10_EXP	__FLT64X_MIN_10_EXP__
398 #undef FLT64X_MAX_EXP
399 #define FLT64X_MAX_EXP		__FLT64X_MAX_EXP__
400 #undef FLT64X_MAX_10_EXP
401 #define FLT64X_MAX_10_EXP	__FLT64X_MAX_10_EXP__
402 #undef FLT64X_MAX
403 #define FLT64X_MAX		__FLT64X_MAX__
404 #undef FLT64X_EPSILON
405 #define FLT64X_EPSILON		__FLT64X_EPSILON__
406 #undef FLT64X_MIN
407 #define FLT64X_MIN		__FLT64X_MIN__
408 #undef FLT64X_DECIMAL_DIG
409 #define FLT64X_DECIMAL_DIG	__FLT64X_DECIMAL_DIG__
410 #undef FLT64X_TRUE_MIN
411 #define FLT64X_TRUE_MIN		__FLT64X_DENORM_MIN__
412 #endif /* __FLT64X_MANT_DIG__.  */
413 
414 #ifdef __FLT128X_MANT_DIG__
415 #undef FLT128X_MANT_DIG
416 #define FLT128X_MANT_DIG	__FLT128X_MANT_DIG__
417 #undef FLT128X_DIG
418 #define FLT128X_DIG		__FLT128X_DIG__
419 #undef FLT128X_MIN_EXP
420 #define FLT128X_MIN_EXP		__FLT128X_MIN_EXP__
421 #undef FLT128X_MIN_10_EXP
422 #define FLT128X_MIN_10_EXP	__FLT128X_MIN_10_EXP__
423 #undef FLT128X_MAX_EXP
424 #define FLT128X_MAX_EXP		__FLT128X_MAX_EXP__
425 #undef FLT128X_MAX_10_EXP
426 #define FLT128X_MAX_10_EXP	__FLT128X_MAX_10_EXP__
427 #undef FLT128X_MAX
428 #define FLT128X_MAX		__FLT128X_MAX__
429 #undef FLT128X_EPSILON
430 #define FLT128X_EPSILON		__FLT128X_EPSILON__
431 #undef FLT128X_MIN
432 #define FLT128X_MIN		__FLT128X_MIN__
433 #undef FLT128X_DECIMAL_DIG
434 #define FLT128X_DECIMAL_DIG	__FLT128X_DECIMAL_DIG__
435 #undef FLT128X_TRUE_MIN
436 #define FLT128X_TRUE_MIN	__FLT128X_DENORM_MIN__
437 #endif /* __FLT128X_MANT_DIG__.  */
438 
439 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__.  */
440 
441 #ifdef __DEC32_MANT_DIG__
442 #if (defined __STDC_WANT_DEC_FP__ \
443      || defined __STDC_WANT_IEC_60559_DFP_EXT__ \
444      || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L))
445 /* C2X; formerly Technical Report 24732, extension for decimal
446    floating-point arithmetic: Characteristic of decimal floating types
447    <float.h>, and TS 18661-2.  */
448 
449 /* Number of base-FLT_RADIX digits in the significand, p.  */
450 #undef DEC32_MANT_DIG
451 #undef DEC64_MANT_DIG
452 #undef DEC128_MANT_DIG
453 #define DEC32_MANT_DIG	__DEC32_MANT_DIG__
454 #define DEC64_MANT_DIG	__DEC64_MANT_DIG__
455 #define DEC128_MANT_DIG	__DEC128_MANT_DIG__
456 
457 /* Minimum exponent. */
458 #undef DEC32_MIN_EXP
459 #undef DEC64_MIN_EXP
460 #undef DEC128_MIN_EXP
461 #define DEC32_MIN_EXP	__DEC32_MIN_EXP__
462 #define DEC64_MIN_EXP	__DEC64_MIN_EXP__
463 #define DEC128_MIN_EXP	__DEC128_MIN_EXP__
464 
465 /* Maximum exponent. */
466 #undef DEC32_MAX_EXP
467 #undef DEC64_MAX_EXP
468 #undef DEC128_MAX_EXP
469 #define DEC32_MAX_EXP	__DEC32_MAX_EXP__
470 #define DEC64_MAX_EXP	__DEC64_MAX_EXP__
471 #define DEC128_MAX_EXP	__DEC128_MAX_EXP__
472 
473 /* Maximum representable finite decimal floating-point number
474    (there are 6, 15, and 33 9s after the decimal points respectively). */
475 #undef DEC32_MAX
476 #undef DEC64_MAX
477 #undef DEC128_MAX
478 #define DEC32_MAX   __DEC32_MAX__
479 #define DEC64_MAX   __DEC64_MAX__
480 #define DEC128_MAX  __DEC128_MAX__
481 
482 /* The difference between 1 and the least value greater than 1 that is
483    representable in the given floating point type. */
484 #undef DEC32_EPSILON
485 #undef DEC64_EPSILON
486 #undef DEC128_EPSILON
487 #define DEC32_EPSILON	__DEC32_EPSILON__
488 #define DEC64_EPSILON	__DEC64_EPSILON__
489 #define DEC128_EPSILON	__DEC128_EPSILON__
490 
491 /* Minimum normalized positive floating-point number. */
492 #undef DEC32_MIN
493 #undef DEC64_MIN
494 #undef DEC128_MIN
495 #define DEC32_MIN	__DEC32_MIN__
496 #define DEC64_MIN	__DEC64_MIN__
497 #define DEC128_MIN	__DEC128_MIN__
498 
499 /* The floating-point expression evaluation method.
500          -1  indeterminate
501          0  evaluate all operations and constants just to the range and
502             precision of the type
503          1  evaluate operations and constants of type _Decimal32
504 	    and _Decimal64 to the range and precision of the _Decimal64
505             type, evaluate _Decimal128 operations and constants to the
506 	    range and precision of the _Decimal128 type;
507 	 2  evaluate all operations and constants to the range and
508 	    precision of the _Decimal128 type.  */
509 
510 #undef DEC_EVAL_METHOD
511 #define DEC_EVAL_METHOD	__DEC_EVAL_METHOD__
512 
513 #endif /* __STDC_WANT_DEC_FP__ || __STDC_WANT_IEC_60559_DFP_EXT__ || C2X.  */
514 
515 #ifdef __STDC_WANT_DEC_FP__
516 
517 /* Minimum subnormal positive floating-point number. */
518 #undef DEC32_SUBNORMAL_MIN
519 #undef DEC64_SUBNORMAL_MIN
520 #undef DEC128_SUBNORMAL_MIN
521 #define DEC32_SUBNORMAL_MIN       __DEC32_SUBNORMAL_MIN__
522 #define DEC64_SUBNORMAL_MIN       __DEC64_SUBNORMAL_MIN__
523 #define DEC128_SUBNORMAL_MIN      __DEC128_SUBNORMAL_MIN__
524 
525 #endif /* __STDC_WANT_DEC_FP__.  */
526 
527 #if (defined __STDC_WANT_IEC_60559_DFP_EXT__ \
528      || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L))
529 
530 /* Minimum subnormal positive floating-point number. */
531 #undef DEC32_TRUE_MIN
532 #undef DEC64_TRUE_MIN
533 #undef DEC128_TRUE_MIN
534 #define DEC32_TRUE_MIN       __DEC32_SUBNORMAL_MIN__
535 #define DEC64_TRUE_MIN       __DEC64_SUBNORMAL_MIN__
536 #define DEC128_TRUE_MIN      __DEC128_SUBNORMAL_MIN__
537 
538 #endif /* __STDC_WANT_IEC_60559_DFP_EXT__ || C2X.  */
539 
540 #endif /* __DEC32_MANT_DIG__ */
541 
542 #endif /* _FLOAT_H___ */
543