about summary refs log tree commit diff
path: root/math/math.h
blob: 87240336e0e9a63bea19294ed31fbcc308bef760 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
/* Declarations for math functions.
   Copyright (C) 1991-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

/*
 *	ISO C99 Standard: 7.12 Mathematics	<math.h>
 */

#ifndef	_MATH_H
#define	_MATH_H	1

#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
#include <bits/libc-header-start.h>

#if defined log && defined __GNUC__
# warning A macro called log was already defined when <math.h> was included.
# warning This will cause compilation problems.
#endif

__BEGIN_DECLS

/* Get definitions of __intmax_t and __uintmax_t.  */
#include <bits/types.h>

/* Get machine-dependent vector math functions declarations.  */
#include <bits/math-vector.h>

/* Gather machine dependent type support.  */
#include <bits/floatn.h>

/* Value returned on overflow.  With IEEE 754 floating point, this is
   +Infinity, otherwise the largest representable positive value.  */
#if __GNUC_PREREQ (3, 3)
# define HUGE_VAL (__builtin_huge_val ())
#else
/* This may provoke compiler warnings, and may not be rounded to
   +Infinity in all IEEE 754 rounding modes, but is the best that can
   be done in ISO C while remaining a constant expression.  10,000 is
   greater than the maximum (decimal) exponent for all supported
   floating-point formats and widths.  */
# define HUGE_VAL 1e10000
#endif
#ifdef __USE_ISOC99
# if __GNUC_PREREQ (3, 3)
#  define HUGE_VALF (__builtin_huge_valf ())
#  define HUGE_VALL (__builtin_huge_vall ())
# else
#  define HUGE_VALF 1e10000f
#  define HUGE_VALL 1e10000L
# endif
#endif
#if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F16 (__builtin_huge_valf16 ())
#endif
#if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F32 (__builtin_huge_valf32 ())
#endif
#if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F64 (__builtin_huge_valf64 ())
#endif
#if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F128 (__builtin_huge_valf128 ())
#endif
#if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F32X (__builtin_huge_valf32x ())
#endif
#if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F64X (__builtin_huge_valf64x ())
#endif
#if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define HUGE_VAL_F128X (__builtin_huge_valf128x ())
#endif

#ifdef __USE_ISOC99
/* IEEE positive infinity.  */
# if __GNUC_PREREQ (3, 3)
#  define INFINITY (__builtin_inff ())
# else
#  define INFINITY HUGE_VALF
# endif

/* IEEE Not A Number.  */
# if __GNUC_PREREQ (3, 3)
#  define NAN (__builtin_nanf (""))
# else
/* This will raise an "invalid" exception outside static initializers,
   but is the best that can be done in ISO C while remaining a
   constant expression.  */
#  define NAN (0.0f / 0.0f)
# endif
#endif /* __USE_ISOC99 */

#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Signaling NaN macros, if supported.  */
# if __GNUC_PREREQ (3, 3)
#  define SNANF (__builtin_nansf (""))
#  define SNAN (__builtin_nans (""))
#  define SNANL (__builtin_nansl (""))
# endif
#endif
#if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF16 (__builtin_nansf16 (""))
#endif
#if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF32 (__builtin_nansf32 (""))
#endif
#if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF64 (__builtin_nansf64 (""))
#endif
#if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF128 (__builtin_nansf128 (""))
#endif
#if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF32X (__builtin_nansf32x (""))
#endif
#if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF64X (__builtin_nansf64x (""))
#endif
#if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
# define SNANF128X (__builtin_nansf128x (""))
#endif

/* Get __GLIBC_FLT_EVAL_METHOD.  */
#include <bits/flt-eval-method.h>

#ifdef __USE_ISOC99
/* Define the following typedefs.

    float_t	floating-point type at least as wide as `float' used
		to evaluate `float' expressions
    double_t	floating-point type at least as wide as `double' used
		to evaluate `double' expressions
*/
# if __GLIBC_FLT_EVAL_METHOD == 0 || __GLIBC_FLT_EVAL_METHOD == 16
typedef float float_t;
typedef double double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 1
typedef double float_t;
typedef double double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 2
typedef long double float_t;
typedef long double double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 32
typedef _Float32 float_t;
typedef double double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 33
typedef _Float32x float_t;
typedef _Float32x double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 64
typedef _Float64 float_t;
typedef _Float64 double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 65
typedef _Float64x float_t;
typedef _Float64x double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 128
typedef _Float128 float_t;
typedef _Float128 double_t;
# elif __GLIBC_FLT_EVAL_METHOD == 129
typedef _Float128x float_t;
typedef _Float128x double_t;
# else
#  error "Unknown __GLIBC_FLT_EVAL_METHOD"
# endif
#endif

/* Define macros for the return values of ilogb and llogb, based on
   __FP_LOGB0_IS_MIN and __FP_LOGBNAN_IS_MIN.

    FP_ILOGB0	Expands to a value returned by `ilogb (0.0)'.
    FP_ILOGBNAN	Expands to a value returned by `ilogb (NAN)'.
    FP_LLOGB0	Expands to a value returned by `llogb (0.0)'.
    FP_LLOGBNAN	Expands to a value returned by `llogb (NAN)'.

*/

#include <bits/fp-logb.h>
#ifdef __USE_ISOC99
# if __FP_LOGB0_IS_MIN
#  define FP_ILOGB0	(-2147483647 - 1)
# else
#  define FP_ILOGB0	(-2147483647)
# endif
# if __FP_LOGBNAN_IS_MIN
#  define FP_ILOGBNAN	(-2147483647 - 1)
# else
#  define FP_ILOGBNAN	2147483647
# endif
#endif
#if __GLIBC_USE (IEC_60559_BFP_EXT)
# if __WORDSIZE == 32
#  define __FP_LONG_MAX 0x7fffffffL
# else
#  define __FP_LONG_MAX 0x7fffffffffffffffL
# endif
# if __FP_LOGB0_IS_MIN
#  define FP_LLOGB0	(-__FP_LONG_MAX - 1)
# else
#  define FP_LLOGB0	(-__FP_LONG_MAX)
# endif
# if __FP_LOGBNAN_IS_MIN
#  define FP_LLOGBNAN	(-__FP_LONG_MAX - 1)
# else
#  define FP_LLOGBNAN	__FP_LONG_MAX
# endif
#endif

/* Get the architecture specific values describing the floating-point
   evaluation.  The following symbols will get defined:

    FP_FAST_FMA
    FP_FAST_FMAF
    FP_FAST_FMAL
		If defined it indicates that the `fma' function
		generally executes about as fast as a multiply and an add.
		This macro is defined only iff the `fma' function is
		implemented directly with a hardware multiply-add instructions.
*/

#include <bits/fp-fast.h>

#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* Rounding direction macros for fromfp functions.  */
enum
  {
    FP_INT_UPWARD =
# define FP_INT_UPWARD 0
      FP_INT_UPWARD,
    FP_INT_DOWNWARD =
# define FP_INT_DOWNWARD 1
      FP_INT_DOWNWARD,
    FP_INT_TOWARDZERO =
# define FP_INT_TOWARDZERO 2
      FP_INT_TOWARDZERO,
    FP_INT_TONEARESTFROMZERO =
# define FP_INT_TONEARESTFROMZERO 3
      FP_INT_TONEARESTFROMZERO,
    FP_INT_TONEAREST =
# define FP_INT_TONEAREST 4
      FP_INT_TONEAREST,
  };
#endif

/* The file <bits/mathcalls.h> contains the prototypes for all the
   actual math functions.  These macros are used for those prototypes,
   so we can easily declare each function as both `name' and `__name',
   and can declare the float versions `namef' and `__namef'.  */

#define __SIMD_DECL(function) __CONCAT (__DECL_SIMD_, function)

#define __MATHCALL_VEC(function, suffix, args) 	\
  __SIMD_DECL (__MATH_PRECNAME (function, suffix)) \
  __MATHCALL (function, suffix, args)

#define __MATHDECL_VEC(type, function,suffix, args) \
  __SIMD_DECL (__MATH_PRECNAME (function, suffix)) \
  __MATHDECL(type, function,suffix, args)

#define __MATHCALL(function,suffix, args)	\
  __MATHDECL (_Mdouble_,function,suffix, args)
#define __MATHDECL(type, function,suffix, args) \
  __MATHDECL_1(type, function,suffix, args); \
  __MATHDECL_1(type, __CONCAT(__,function),suffix, args)
#define __MATHCALLX(function,suffix, args, attrib)	\
  __MATHDECLX (_Mdouble_,function,suffix, args, attrib)
#define __MATHDECLX(type, function,suffix, args, attrib) \
  __MATHDECL_1(type, function,suffix, args) __attribute__ (attrib); \
  __MATHDECL_1(type, __CONCAT(__,function),suffix, args) __attribute__ (attrib)
#define __MATHDECL_1(type, function,suffix, args) \
  extern type __MATH_PRECNAME(function,suffix) args __THROW

#define _Mdouble_		double
#define __MATH_PRECNAME(name,r)	__CONCAT(name,r)
#define __MATH_DECLARING_DOUBLE  1
#define __MATH_DECLARING_FLOATN  0
#include <bits/mathcalls-helper-functions.h>
#include <bits/mathcalls.h>
#undef	_Mdouble_
#undef	__MATH_PRECNAME
#undef __MATH_DECLARING_DOUBLE
#undef __MATH_DECLARING_FLOATN

#ifdef __USE_ISOC99


/* Include the file of declarations again, this time using `float'
   instead of `double' and appending f to each function name.  */

# define _Mdouble_		float
# define __MATH_PRECNAME(name,r) name##f##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  0
# include <bits/mathcalls-helper-functions.h>
# include <bits/mathcalls.h>
# undef	_Mdouble_
# undef	__MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN

# if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \
     || defined __LDBL_COMPAT \
     || defined _LIBC_TEST
#  ifdef __LDBL_COMPAT

#   ifdef __USE_ISOC99
extern float __nldbl_nexttowardf (float __x, long double __y)
				  __THROW __attribute__ ((__const__));
#    ifdef __REDIRECT_NTH
extern float __REDIRECT_NTH (nexttowardf, (float __x, long double __y),
			     __nldbl_nexttowardf)
     __attribute__ ((__const__));
extern double __REDIRECT_NTH (nexttoward, (double __x, long double __y),
			      nextafter) __attribute__ ((__const__));
extern long double __REDIRECT_NTH (nexttowardl,
				   (long double __x, long double __y),
				   nextafter) __attribute__ ((__const__));
#    endif
#   endif

#   undef __MATHDECL_1
#   define __MATHDECL_2(type, function,suffix, args, alias) \
  extern type __REDIRECT_NTH(__MATH_PRECNAME(function,suffix), \
			     args, alias)
#   define __MATHDECL_1(type, function,suffix, args) \
  __MATHDECL_2(type, function,suffix, args, __CONCAT(function,suffix))
#  endif

/* Include the file of declarations again, this time using `long double'
   instead of `double' and appending l to each function name.  */

#  define _Mdouble_		long double
#  define __MATH_PRECNAME(name,r) name##l##r
#  define __MATH_DECLARING_DOUBLE  0
#  define __MATH_DECLARING_FLOATN  0
#  define __MATH_DECLARE_LDOUBLE   1
#  include <bits/mathcalls-helper-functions.h>
#  include <bits/mathcalls.h>
#  undef _Mdouble_
#  undef __MATH_PRECNAME
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN

# endif /* !(__NO_LONG_DOUBLE_MATH && _LIBC) || __LDBL_COMPAT */

#endif	/* Use ISO C99.  */

/* Include the file of declarations for _FloatN and _FloatNx
   types.  */

#if __HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !defined _LIBC)
# define _Mdouble_		_Float16
# define __MATH_PRECNAME(name,r) name##f16##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT16
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !defined _LIBC)
# define _Mdouble_		_Float32
# define __MATH_PRECNAME(name,r) name##f32##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT32
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !defined _LIBC)
# define _Mdouble_		_Float64
# define __MATH_PRECNAME(name,r) name##f64##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT64
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !defined _LIBC)
# define _Mdouble_		_Float128
# define __MATH_PRECNAME(name,r) name##f128##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT128
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !defined _LIBC)
# define _Mdouble_		_Float32x
# define __MATH_PRECNAME(name,r) name##f32x##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT32X
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !defined _LIBC)
# define _Mdouble_		_Float64x
# define __MATH_PRECNAME(name,r) name##f64x##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT64X
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !_LIBC).  */

#if __HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !defined _LIBC)
# define _Mdouble_		_Float128x
# define __MATH_PRECNAME(name,r) name##f128x##r
# define __MATH_DECLARING_DOUBLE  0
# define __MATH_DECLARING_FLOATN  1
# if __HAVE_DISTINCT_FLOAT128X
#  include <bits/mathcalls-helper-functions.h>
# endif
# if __GLIBC_USE (IEC_60559_TYPES_EXT)
#  include <bits/mathcalls.h>
# endif
# undef _Mdouble_
# undef __MATH_PRECNAME
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
#endif /* __HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !_LIBC).  */

#undef	__MATHDECL_1
#undef	__MATHDECL
#undef	__MATHCALL

/* Declare functions returning a narrower type.  */
#define __MATHCALL_NARROW_ARGS_1 (_Marg_ __x)
#define __MATHCALL_NARROW_ARGS_2 (_Marg_ __x, _Marg_ __y)
#define __MATHCALL_NARROW_ARGS_3 (_Marg_ __x, _Marg_ __y, _Marg_ __z)
#define __MATHCALL_NARROW_NORMAL(func, nargs)			\
  extern _Mret_ func __MATHCALL_NARROW_ARGS_ ## nargs __THROW
#define __MATHCALL_NARROW_REDIR(func, redir, nargs)			\
  extern _Mret_ __REDIRECT_NTH (func, __MATHCALL_NARROW_ARGS_ ## nargs, \
				redir)
#define __MATHCALL_NARROW(func, redir, nargs)	\
  __MATHCALL_NARROW_NORMAL (func, nargs)

#if __GLIBC_USE (IEC_60559_BFP_EXT)

# define _Mret_ float
# define _Marg_ double
# define __MATHCALL_NAME(name) f ## name
# include <bits/mathcalls-narrow.h>
# undef _Mret_
# undef _Marg_
# undef __MATHCALL_NAME

# define _Mret_ float
# define _Marg_ long double
# define __MATHCALL_NAME(name) f ## name ## l
# ifdef __LDBL_COMPAT
#  define __MATHCALL_REDIR_NAME(name) f ## name
#  undef __MATHCALL_NARROW
#  define __MATHCALL_NARROW(func, redir, nargs) \
  __MATHCALL_NARROW_REDIR (func, redir, nargs)
# endif
# include <bits/mathcalls-narrow.h>
# undef _Mret_
# undef _Marg_
# undef __MATHCALL_NAME
# ifdef __LDBL_COMPAT
#  undef __MATHCALL_REDIR_NAME
#  undef __MATHCALL_NARROW
#  define __MATHCALL_NARROW(func, redir, nargs) \
  __MATHCALL_NARROW_NORMAL (func, nargs)
# endif

# define _Mret_ double
# define _Marg_ long double
# define __MATHCALL_NAME(name) d ## name ## l
# ifdef __LDBL_COMPAT
#  define __MATHCALL_REDIR_NAME(name) __nldbl_d ## name ## l
#  undef __MATHCALL_NARROW
#  define __MATHCALL_NARROW(func, redir, nargs) \
  __MATHCALL_NARROW_REDIR (func, redir, nargs)
# endif
# include <bits/mathcalls-narrow.h>
# undef _Mret_
# undef _Marg_
# undef __MATHCALL_NAME
# ifdef __LDBL_COMPAT
#  undef __MATHCALL_REDIR_NAME
#  undef __MATHCALL_NARROW
#  define __MATHCALL_NARROW(func, redir, nargs) \
  __MATHCALL_NARROW_NORMAL (func, nargs)
# endif

#endif

#if __GLIBC_USE (IEC_60559_TYPES_EXT)

# if __HAVE_FLOAT16 && __HAVE_FLOAT32
#  define _Mret_ _Float16
#  define _Marg_ _Float32
#  define __MATHCALL_NAME(name) f16 ## name ## f32
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT16 && __HAVE_FLOAT32X
#  define _Mret_ _Float16
#  define _Marg_ _Float32x
#  define __MATHCALL_NAME(name) f16 ## name ## f32x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT16 && __HAVE_FLOAT64
#  define _Mret_ _Float16
#  define _Marg_ _Float64
#  define __MATHCALL_NAME(name) f16 ## name ## f64
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT16 && __HAVE_FLOAT64X
#  define _Mret_ _Float16
#  define _Marg_ _Float64x
#  define __MATHCALL_NAME(name) f16 ## name ## f64x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT16 && __HAVE_FLOAT128
#  define _Mret_ _Float16
#  define _Marg_ _Float128
#  define __MATHCALL_NAME(name) f16 ## name ## f128
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT16 && __HAVE_FLOAT128X
#  define _Mret_ _Float16
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f16 ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32 && __HAVE_FLOAT32X
#  define _Mret_ _Float32
#  define _Marg_ _Float32x
#  define __MATHCALL_NAME(name) f32 ## name ## f32x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32 && __HAVE_FLOAT64
#  define _Mret_ _Float32
#  define _Marg_ _Float64
#  define __MATHCALL_NAME(name) f32 ## name ## f64
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32 && __HAVE_FLOAT64X
#  define _Mret_ _Float32
#  define _Marg_ _Float64x
#  define __MATHCALL_NAME(name) f32 ## name ## f64x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32 && __HAVE_FLOAT128
#  define _Mret_ _Float32
#  define _Marg_ _Float128
#  define __MATHCALL_NAME(name) f32 ## name ## f128
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32 && __HAVE_FLOAT128X
#  define _Mret_ _Float32
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f32 ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32X && __HAVE_FLOAT64
#  define _Mret_ _Float32x
#  define _Marg_ _Float64
#  define __MATHCALL_NAME(name) f32x ## name ## f64
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32X && __HAVE_FLOAT64X
#  define _Mret_ _Float32x
#  define _Marg_ _Float64x
#  define __MATHCALL_NAME(name) f32x ## name ## f64x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32X && __HAVE_FLOAT128
#  define _Mret_ _Float32x
#  define _Marg_ _Float128
#  define __MATHCALL_NAME(name) f32x ## name ## f128
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT32X && __HAVE_FLOAT128X
#  define _Mret_ _Float32x
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f32x ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT64 && __HAVE_FLOAT64X
#  define _Mret_ _Float64
#  define _Marg_ _Float64x
#  define __MATHCALL_NAME(name) f64 ## name ## f64x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT64 && __HAVE_FLOAT128
#  define _Mret_ _Float64
#  define _Marg_ _Float128
#  define __MATHCALL_NAME(name) f64 ## name ## f128
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT64 && __HAVE_FLOAT128X
#  define _Mret_ _Float64
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f64 ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT64X && __HAVE_FLOAT128
#  define _Mret_ _Float64x
#  define _Marg_ _Float128
#  define __MATHCALL_NAME(name) f64x ## name ## f128
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT64X && __HAVE_FLOAT128X
#  define _Mret_ _Float64x
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f64x ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

# if __HAVE_FLOAT128 && __HAVE_FLOAT128X
#  define _Mret_ _Float128
#  define _Marg_ _Float128x
#  define __MATHCALL_NAME(name) f128 ## name ## f128x
#  include <bits/mathcalls-narrow.h>
#  undef _Mret_
#  undef _Marg_
#  undef __MATHCALL_NAME
# endif

#endif

#undef __MATHCALL_NARROW_ARGS_1
#undef __MATHCALL_NARROW_ARGS_2
#undef __MATHCALL_NARROW_ARGS_3
#undef __MATHCALL_NARROW_NORMAL
#undef __MATHCALL_NARROW_REDIR
#undef __MATHCALL_NARROW

#if defined __USE_MISC || defined __USE_XOPEN
/* This variable is used by `gamma' and `lgamma'.  */
extern int signgam;
#endif

#if (__HAVE_DISTINCT_FLOAT16			\
     || __HAVE_DISTINCT_FLOAT32			\
     || __HAVE_DISTINCT_FLOAT64			\
     || __HAVE_DISTINCT_FLOAT32X		\
     || __HAVE_DISTINCT_FLOAT64X		\
     || __HAVE_DISTINCT_FLOAT128X)
# error "Unsupported _FloatN or _FloatNx types for <math.h>."
#endif

/* Depending on the type of TG_ARG, call an appropriately suffixed
   version of FUNC with arguments (including parentheses) ARGS.
   Suffixed functions may not exist for long double if it has the same
   format as double, or for other types with the same format as float,
   double or long double.  The behavior is undefined if the argument
   does not have a real floating type.  The definition may use a
   conditional expression, so all suffixed versions of FUNC must
   return the same type (FUNC may include a cast if necessary rather
   than being a single identifier).  */
#ifdef __NO_LONG_DOUBLE_MATH
# if __HAVE_DISTINCT_FLOAT128
#  error "Distinct _Float128 without distinct long double not supported."
# endif
# define __MATH_TG(TG_ARG, FUNC, ARGS)					\
  (sizeof (TG_ARG) == sizeof (float) ? FUNC ## f ARGS : FUNC ARGS)
#elif __HAVE_DISTINCT_FLOAT128
# if __HAVE_GENERIC_SELECTION
#  if __HAVE_FLOATN_NOT_TYPEDEF && __HAVE_FLOAT32
#   define __MATH_TG_F32(FUNC, ARGS) _Float32: FUNC ## f ARGS,
#  else
#   define __MATH_TG_F32(FUNC, ARGS)
#  endif
#  if __HAVE_FLOATN_NOT_TYPEDEF && __HAVE_FLOAT64X
#   if __HAVE_FLOAT64X_LONG_DOUBLE
#    define __MATH_TG_F64X(FUNC, ARGS) _Float64x: FUNC ## l ARGS,
#   else
#    define __MATH_TG_F64X(FUNC, ARGS) _Float64x: FUNC ## f128 ARGS,
#   endif
#  else
#   define __MATH_TG_F64X(FUNC, ARGS)
#  endif
#  define __MATH_TG(TG_ARG, FUNC, ARGS)	\
     _Generic ((TG_ARG),			\
	       float: FUNC ## f ARGS,		\
	       __MATH_TG_F32 (FUNC, ARGS)	\
	       default: FUNC ARGS,		\
	       long double: FUNC ## l ARGS,	\
	       __MATH_TG_F64X (FUNC, ARGS)	\
	       _Float128: FUNC ## f128 ARGS)
# else
#  if __HAVE_FLOATN_NOT_TYPEDEF
#   error "Non-typedef _FloatN but no _Generic."
#  endif
#  define __MATH_TG(TG_ARG, FUNC, ARGS)					\
     __builtin_choose_expr						\
     (__builtin_types_compatible_p (__typeof (TG_ARG), float),		\
      FUNC ## f ARGS,							\
      __builtin_choose_expr						\
      (__builtin_types_compatible_p (__typeof (TG_ARG), double),	\
       FUNC ARGS,							\
       __builtin_choose_expr						\
       (__builtin_types_compatible_p (__typeof (TG_ARG), long double),	\
	FUNC ## l ARGS,							\
	FUNC ## f128 ARGS)))
# endif
#else
# define __MATH_TG(TG_ARG, FUNC, ARGS)		\
  (sizeof (TG_ARG) == sizeof (float)		\
   ? FUNC ## f ARGS				\
   : sizeof (TG_ARG) == sizeof (double)		\
   ? FUNC ARGS					\
   : FUNC ## l ARGS)
#endif

/* ISO C99 defines some generic macros which work on any data type.  */
#ifdef __USE_ISOC99

/* All floating-point numbers can be put in one of these categories.  */
enum
  {
    FP_NAN =
# define FP_NAN 0
      FP_NAN,
    FP_INFINITE =
# define FP_INFINITE 1
      FP_INFINITE,
    FP_ZERO =
# define FP_ZERO 2
      FP_ZERO,
    FP_SUBNORMAL =
# define FP_SUBNORMAL 3
      FP_SUBNORMAL,
    FP_NORMAL =
# define FP_NORMAL 4
      FP_NORMAL
  };

/* GCC bug 66462 means we cannot use the math builtins with -fsignaling-nan,
   so disable builtins if this is enabled.  When fixed in a newer GCC,
   the __SUPPORT_SNAN__ check may be skipped for those versions.  */

/* Return number of classification appropriate for X.  */
# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__			      \
     && (!defined __OPTIMIZE_SIZE__ || defined __cplusplus)
     /* The check for __cplusplus allows the use of the builtin, even
	when optimization for size is on.  This is provided for
	libstdc++, only to let its configure test work when it is built
	with -Os.  No further use of this definition of fpclassify is
	expected in C++ mode, since libstdc++ provides its own version
	of fpclassify in cmath (which undefines fpclassify).  */
#  define fpclassify(x) __builtin_fpclassify (FP_NAN, FP_INFINITE,	      \
     FP_NORMAL, FP_SUBNORMAL, FP_ZERO, x)
# else
#  define fpclassify(x) __MATH_TG ((x), __fpclassify, (x))
# endif

/* Return nonzero value if sign of X is negative.  */
# if __GNUC_PREREQ (6,0)
#  define signbit(x) __builtin_signbit (x)
# elif defined __cplusplus
  /* In C++ mode, __MATH_TG cannot be used, because it relies on
     __builtin_types_compatible_p, which is a C-only builtin.
     The check for __cplusplus allows the use of the builtin instead of
     __MATH_TG. This is provided for libstdc++, only to let its configure
     test work. No further use of this definition of signbit is expected
     in C++ mode, since libstdc++ provides its own version of signbit
     in cmath (which undefines signbit). */
#  define signbit(x) __builtin_signbitl (x)
# elif __GNUC_PREREQ (4,0)
#  define signbit(x) __MATH_TG ((x), __builtin_signbit, (x))
# else
#  define signbit(x) __MATH_TG ((x), __signbit, (x))
# endif

/* Return nonzero value if X is not +-Inf or NaN.  */
# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
#  define isfinite(x) __builtin_isfinite (x)
# else
#  define isfinite(x) __MATH_TG ((x), __finite, (x))
# endif

/* Return nonzero value if X is neither zero, subnormal, Inf, nor NaN.  */
# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
#  define isnormal(x) __builtin_isnormal (x)
# else
#  define isnormal(x) (fpclassify (x) == FP_NORMAL)
# endif

/* Return nonzero value if X is a NaN.  We could use `fpclassify' but
   we already have this functions `__isnan' and it is faster.  */
# if __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
#  define isnan(x) __builtin_isnan (x)
# else
#  define isnan(x) __MATH_TG ((x), __isnan, (x))
# endif

/* Return nonzero value if X is positive or negative infinity.  */
# if __HAVE_DISTINCT_FLOAT128 && !__GNUC_PREREQ (7,0) \
     && !defined __SUPPORT_SNAN__ && !defined __cplusplus
   /* Since __builtin_isinf_sign is broken for float128 before GCC 7.0,
      use the helper function, __isinff128, with older compilers.  This is
      only provided for C mode, because in C++ mode, GCC has no support
      for __builtin_types_compatible_p (and when in C++ mode, this macro is
      not used anyway, because libstdc++ headers undefine it).  */
#  define isinf(x) \
    (__builtin_types_compatible_p (__typeof (x), _Float128) \
     ? __isinff128 (x) : __builtin_isinf_sign (x))
# elif __GNUC_PREREQ (4,4) && !defined __SUPPORT_SNAN__
#  define isinf(x) __builtin_isinf_sign (x)
# else
#  define isinf(x) __MATH_TG ((x), __isinf, (x))
# endif

/* Bitmasks for the math_errhandling macro.  */
# define MATH_ERRNO	1	/* errno set by math functions.  */
# define MATH_ERREXCEPT	2	/* Exceptions raised by math functions.  */

/* By default all math functions support both errno and exception handling
   (except for soft floating point implementations which may only support
   errno handling).  If errno handling is disabled, exceptions are still
   supported by GLIBC.  Set math_errhandling to 0 with -ffast-math (this is
   nonconforming but it is more useful than leaving it undefined).  */
# ifdef __FAST_MATH__
#  define math_errhandling	0
# elif defined __NO_MATH_ERRNO__
#  define math_errhandling	(MATH_ERREXCEPT)
# else
#  define math_errhandling	(MATH_ERRNO | MATH_ERREXCEPT)
# endif

#endif /* Use ISO C99.  */

#if __GLIBC_USE (IEC_60559_BFP_EXT)
# include <bits/iscanonical.h>

/* Return nonzero value if X is a signaling NaN.  */
# ifndef __cplusplus
#  define issignaling(x) __MATH_TG ((x), __issignaling, (x))
# else
   /* In C++ mode, __MATH_TG cannot be used, because it relies on
      __builtin_types_compatible_p, which is a C-only builtin.  On the
      other hand, overloading provides the means to distinguish between
      the floating-point types.  The overloading resolution will match
      the correct parameter (regardless of type qualifiers (i.e.: const
      and volatile)).  */
extern "C++" {
inline int issignaling (float __val) { return __issignalingf (__val); }
inline int issignaling (double __val) { return __issignaling (__val); }
inline int
issignaling (long double __val)
{
#  ifdef __NO_LONG_DOUBLE_MATH
  return __issignaling (__val);
#  else
  return __issignalingl (__val);
#  endif
}
#  if __HAVE_FLOAT128_UNLIKE_LDBL
/* When using an IEEE 128-bit long double, _Float128 is defined as long double
   in C++.  */
inline int issignaling (_Float128 __val) { return __issignalingf128 (__val); }
#  endif
} /* extern C++ */
# endif

/* Return nonzero value if X is subnormal.  */
# define issubnormal(x) (fpclassify (x) == FP_SUBNORMAL)

/* Return nonzero value if X is zero.  */
# ifndef __cplusplus
#  ifdef __SUPPORT_SNAN__
#   define iszero(x) (fpclassify (x) == FP_ZERO)
#  else
#   define iszero(x) (((__typeof (x)) (x)) == 0)
#  endif
# else	/* __cplusplus */
extern "C++" {
#  ifdef __SUPPORT_SNAN__
inline int
iszero (float __val)
{
  return __fpclassifyf (__val) == FP_ZERO;
}
inline int
iszero (double __val)
{
  return __fpclassify (__val) == FP_ZERO;
}
inline int
iszero (long double __val)
{
#   ifdef __NO_LONG_DOUBLE_MATH
  return __fpclassify (__val) == FP_ZERO;
#   else
  return __fpclassifyl (__val) == FP_ZERO;
#   endif
}
#   if __HAVE_FLOAT128_UNLIKE_LDBL
  /* When using an IEEE 128-bit long double, _Float128 is defined as long double
     in C++.  */
inline int
iszero (_Float128 __val)
{
  return __fpclassifyf128 (__val) == FP_ZERO;
}
#   endif
#  else
template <class __T> inline bool
iszero (__T __val)
{
  return __val == 0;
}
#  endif
} /* extern C++ */
# endif	/* __cplusplus */
#endif /* Use IEC_60559_BFP_EXT.  */

#ifdef __USE_XOPEN
/* X/Open wants another strange constant.  */
# define MAXFLOAT	3.40282347e+38F
#endif


/* Some useful constants.  */
#if defined __USE_MISC || defined __USE_XOPEN
# define M_E		2.7182818284590452354	/* e */
# define M_LOG2E	1.4426950408889634074	/* log_2 e */
# define M_LOG10E	0.43429448190325182765	/* log_10 e */
# define M_LN2		0.69314718055994530942	/* log_e 2 */
# define M_LN10		2.30258509299404568402	/* log_e 10 */
# define M_PI		3.14159265358979323846	/* pi */
# define M_PI_2		1.57079632679489661923	/* pi/2 */
# define M_PI_4		0.78539816339744830962	/* pi/4 */
# define M_1_PI		0.31830988618379067154	/* 1/pi */
# define M_2_PI		0.63661977236758134308	/* 2/pi */
# define M_2_SQRTPI	1.12837916709551257390	/* 2/sqrt(pi) */
# define M_SQRT2	1.41421356237309504880	/* sqrt(2) */
# define M_SQRT1_2	0.70710678118654752440	/* 1/sqrt(2) */
#endif

/* The above constants are not adequate for computation using `long double's.
   Therefore we provide as an extension constants with similar names as a
   GNU extension.  Provide enough digits for the 128-bit IEEE quad.  */
#ifdef __USE_GNU
# define M_El		2.718281828459045235360287471352662498L /* e */
# define M_LOG2El	1.442695040888963407359924681001892137L /* log_2 e */
# define M_LOG10El	0.434294481903251827651128918916605082L /* log_10 e */
# define M_LN2l		0.693147180559945309417232121458176568L /* log_e 2 */
# define M_LN10l	2.302585092994045684017991454684364208L /* log_e 10 */
# define M_PIl		3.141592653589793238462643383279502884L /* pi */
# define M_PI_2l	1.570796326794896619231321691639751442L /* pi/2 */
# define M_PI_4l	0.785398163397448309615660845819875721L /* pi/4 */
# define M_1_PIl	0.318309886183790671537767526745028724L /* 1/pi */
# define M_2_PIl	0.636619772367581343075535053490057448L /* 2/pi */
# define M_2_SQRTPIl	1.128379167095512573896158903121545172L /* 2/sqrt(pi) */
# define M_SQRT2l	1.414213562373095048801688724209698079L /* sqrt(2) */
# define M_SQRT1_2l	0.707106781186547524400844362104849039L /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT16 && defined __USE_GNU
# define M_Ef16		__f16 (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef16	__f16 (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef16	__f16 (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f16	__f16 (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f16	__f16 (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf16	__f16 (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f16	__f16 (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f16	__f16 (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf16	__f16 (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf16	__f16 (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf16	__f16 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f16	__f16 (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f16	__f16 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT32 && defined __USE_GNU
# define M_Ef32		__f32 (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef32	__f32 (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef32	__f32 (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f32	__f32 (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f32	__f32 (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf32	__f32 (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f32	__f32 (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f32	__f32 (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf32	__f32 (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf32	__f32 (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf32	__f32 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f32	__f32 (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f32	__f32 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT64 && defined __USE_GNU
# define M_Ef64		__f64 (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef64	__f64 (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef64	__f64 (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f64	__f64 (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f64	__f64 (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf64	__f64 (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f64	__f64 (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f64	__f64 (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf64	__f64 (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf64	__f64 (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf64	__f64 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f64	__f64 (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f64	__f64 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT128 && defined __USE_GNU
# define M_Ef128	__f128 (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef128	__f128 (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef128	__f128 (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f128	__f128 (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f128	__f128 (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf128	__f128 (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f128	__f128 (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f128	__f128 (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf128	__f128 (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf128	__f128 (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf128	__f128 (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f128	__f128 (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f128	__f128 (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT32X && defined __USE_GNU
# define M_Ef32x	__f32x (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef32x	__f32x (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef32x	__f32x (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f32x	__f32x (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f32x	__f32x (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf32x	__f32x (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f32x	__f32x (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f32x	__f32x (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf32x	__f32x (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf32x	__f32x (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf32x	__f32x (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f32x	__f32x (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f32x	__f32x (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT64X && defined __USE_GNU
# define M_Ef64x	__f64x (2.718281828459045235360287471352662498) /* e */
# define M_LOG2Ef64x	__f64x (1.442695040888963407359924681001892137) /* log_2 e */
# define M_LOG10Ef64x	__f64x (0.434294481903251827651128918916605082) /* log_10 e */
# define M_LN2f64x	__f64x (0.693147180559945309417232121458176568) /* log_e 2 */
# define M_LN10f64x	__f64x (2.302585092994045684017991454684364208) /* log_e 10 */
# define M_PIf64x	__f64x (3.141592653589793238462643383279502884) /* pi */
# define M_PI_2f64x	__f64x (1.570796326794896619231321691639751442) /* pi/2 */
# define M_PI_4f64x	__f64x (0.785398163397448309615660845819875721) /* pi/4 */
# define M_1_PIf64x	__f64x (0.318309886183790671537767526745028724) /* 1/pi */
# define M_2_PIf64x	__f64x (0.636619772367581343075535053490057448) /* 2/pi */
# define M_2_SQRTPIf64x	__f64x (1.128379167095512573896158903121545172) /* 2/sqrt(pi) */
# define M_SQRT2f64x	__f64x (1.414213562373095048801688724209698079) /* sqrt(2) */
# define M_SQRT1_2f64x	__f64x (0.707106781186547524400844362104849039) /* 1/sqrt(2) */
#endif

#if __HAVE_FLOAT128X && defined __USE_GNU
# error "M_* values needed for _Float128x"
#endif

/* When compiling in strict ISO C compatible mode we must not use the
   inline functions since they, among other things, do not set the
   `errno' variable correctly.  */
#if defined __STRICT_ANSI__ && !defined __NO_MATH_INLINES
# define __NO_MATH_INLINES	1
#endif

#ifdef __USE_ISOC99
# if __GNUC_PREREQ (3, 1)
/* ISO C99 defines some macros to compare number while taking care for
   unordered numbers.  Many FPUs provide special instructions to support
   these operations.  Generic support in GCC for these as builtins went
   in 2.97, but not all cpus added their patterns until 3.1.  Therefore
   we enable the builtins from 3.1 onwards and use a generic implementation
   othwerwise.  */
#  define isgreater(x, y)	__builtin_isgreater(x, y)
#  define isgreaterequal(x, y)	__builtin_isgreaterequal(x, y)
#  define isless(x, y)		__builtin_isless(x, y)
#  define islessequal(x, y)	__builtin_islessequal(x, y)
#  define islessgreater(x, y)	__builtin_islessgreater(x, y)
#  define isunordered(x, y)	__builtin_isunordered(x, y)
# else
#  define isgreater(x, y) \
  (__extension__ ({ __typeof__ (x) __x = (x); __typeof__ (y) __y = (y); \
		    !isunordered (__x, __y) && __x > __y; }))
#  define isgreaterequal(x, y) \
  (__extension__ ({ __typeof__ (x) __x = (x); __typeof__ (y) __y = (y); \
		    !isunordered (__x, __y) && __x >= __y; }))
#  define isless(x, y) \
  (__extension__ ({ __typeof__ (x) __x = (x); __typeof__ (y) __y = (y); \
		    !isunordered (__x, __y) && __x < __y; }))
#  define islessequal(x, y) \
  (__extension__ ({ __typeof__ (x) __x = (x); __typeof__ (y) __y = (y); \
		    !isunordered (__x, __y) && __x <= __y; }))
#  define islessgreater(x, y) \
  (__extension__ ({ __typeof__ (x) __x = (x); __typeof__ (y) __y = (y); \
		    !isunordered (__x, __y) && __x != __y; }))
/* isunordered must always check both operands first for signaling NaNs.  */
#  define isunordered(x, y) \
  (__extension__ ({ __typeof__ (x) __u = (x); __typeof__ (y) __v = (y); \
		    __u != __v && (__u != __u || __v != __v); }))
# endif
#endif

/* Get machine-dependent inline versions (if there are any).  */
#ifdef __USE_EXTERN_INLINES
# include <bits/mathinline.h>
#endif

/* Define special entry points to use when the compiler got told to
   only expect finite results.  */
#if defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0

/* Include bits/math-finite.h for double.  */
# define _Mdouble_ double
# define __MATH_DECLARING_DOUBLE 1
# define __MATH_DECLARING_FLOATN 0
# define __REDIRFROM_X(function, reentrant) \
  function ## reentrant
# define __REDIRTO_X(function, reentrant) \
   __ ## function ## reentrant ## _finite
# include <bits/math-finite.h>
# undef _Mdouble_
# undef __MATH_DECLARING_DOUBLE
# undef __MATH_DECLARING_FLOATN
# undef __REDIRFROM_X
# undef __REDIRTO_X

/* When __USE_ISOC99 is defined, include math-finite for float and
   long double, as well.  */
# ifdef __USE_ISOC99

/* Include bits/math-finite.h for float.  */
#  define _Mdouble_ float
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 0
#  define __REDIRFROM_X(function, reentrant) \
  function ## f ## reentrant
#  define __REDIRTO_X(function, reentrant) \
   __ ## function ## f ## reentrant ## _finite
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X

/* Include bits/math-finite.h for long double.  */
#  ifdef __MATH_DECLARE_LDOUBLE
#   define _Mdouble_ long double
#   define __MATH_DECLARING_DOUBLE 0
#   define __MATH_DECLARING_FLOATN 0
#   define __REDIRFROM_X(function, reentrant) \
  function ## l ## reentrant
#   ifdef __NO_LONG_DOUBLE_MATH
#    define __REDIRTO_X(function, reentrant) \
   __ ## function ## reentrant ## _finite
#   else
#    define __REDIRTO_X(function, reentrant) \
   __ ## function ## l ## reentrant ## _finite
#   endif
#   include <bits/math-finite.h>
#   undef _Mdouble_
#   undef __MATH_DECLARING_DOUBLE
#   undef __MATH_DECLARING_FLOATN
#   undef __REDIRFROM_X
#   undef __REDIRTO_X
#  endif

# endif /* __USE_ISOC99.  */

/* Include bits/math-finite.h for _FloatN and _FloatNx.  */

# if (__HAVE_DISTINCT_FLOAT16 || (__HAVE_FLOAT16 && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float16
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f16 ## reentrant
#  if __HAVE_DISTINCT_FLOAT16
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f16 ## reentrant ## _finite
#  else
#   error "non-disinct _Float16"
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT32 || (__HAVE_FLOAT32 && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float32
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f32 ## reentrant
#  if __HAVE_DISTINCT_FLOAT32
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f32 ## reentrant ## _finite
#  else
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f ## reentrant ## _finite
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT64 || (__HAVE_FLOAT64 && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float64
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f64 ## reentrant
#  if __HAVE_DISTINCT_FLOAT64
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f64 ## reentrant ## _finite
#  else
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## reentrant ## _finite
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float128
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f128 ## reentrant
#  if __HAVE_DISTINCT_FLOAT128
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f128 ## reentrant ## _finite
#  else
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## l ## reentrant ## _finite
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT32X || (__HAVE_FLOAT32X && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float32x
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f32x ## reentrant
#  if __HAVE_DISTINCT_FLOAT32X
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f32x ## reentrant ## _finite
#  else
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## reentrant ## _finite
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT64X || (__HAVE_FLOAT64X && !defined _LIBC))	\
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float64x
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f64x ## reentrant
#  if __HAVE_DISTINCT_FLOAT64X
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f64x ## reentrant ## _finite
#  elif __HAVE_FLOAT64X_LONG_DOUBLE
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## l ## reentrant ## _finite
#  else
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f128 ## reentrant ## _finite
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

# if (__HAVE_DISTINCT_FLOAT128X || (__HAVE_FLOAT128X && !defined _LIBC)) \
      && __GLIBC_USE (IEC_60559_TYPES_EXT)
#  define _Mdouble_ _Float128x
#  define __MATH_DECLARING_DOUBLE 0
#  define __MATH_DECLARING_FLOATN 1
#  define __REDIRFROM_X(function, reentrant) \
  function ## f128x ## reentrant
#  if __HAVE_DISTINCT_FLOAT128X
#   define __REDIRTO_X(function, reentrant) \
   __ ## function ## f128x ## reentrant ## _finite
#  else
#   error "non-disinct _Float128x"
#  endif
#  include <bits/math-finite.h>
#  undef _Mdouble_
#  undef __MATH_DECLARING_DOUBLE
#  undef __MATH_DECLARING_FLOATN
#  undef __REDIRFROM_X
#  undef __REDIRTO_X
# endif

#endif /* __FINITE_MATH_ONLY__ > 0.  */

#if __GLIBC_USE (IEC_60559_BFP_EXT)
/* An expression whose type has the widest of the evaluation formats
   of X and Y (which are of floating-point types).  */
# if __FLT_EVAL_METHOD__ == 2 || __FLT_EVAL_METHOD__ > 64
#  define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0L)
# elif __FLT_EVAL_METHOD__ == 1 || __FLT_EVAL_METHOD__ > 32
#  define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0)
# elif __FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 32
#  define __MATH_EVAL_FMT2(x, y) ((x) + (y) + 0.0f)
# else
#  define __MATH_EVAL_FMT2(x, y) ((x) + (y))
# endif

/* Return X == Y but raising "invalid" and setting errno if X or Y is
   a NaN.  */
# if !defined __cplusplus || (__cplusplus < 201103L && !defined __GNUC__)
#  define iseqsig(x, y) \
   __MATH_TG (__MATH_EVAL_FMT2 (x, y), __iseqsig, ((x), (y)))
# else
/* In C++ mode, __MATH_TG cannot be used, because it relies on
   __builtin_types_compatible_p, which is a C-only builtin.  Moreover,
   the comparison macros from ISO C take two floating-point arguments,
   which need not have the same type.  Choosing what underlying function
   to call requires evaluating the formats of the arguments, then
   selecting which is wider.  The macro __MATH_EVAL_FMT2 provides this
   information, however, only the type of the macro expansion is
   relevant (actually evaluating the expression would be incorrect).
   Thus, the type is used as a template parameter for __iseqsig_type,
   which calls the appropriate underlying function.  */
extern "C++" {
template<typename> struct __iseqsig_type;

template<> struct __iseqsig_type<float>
{
  static int __call (float __x, float __y) throw ()
  {
    return __iseqsigf (__x, __y);
  }
};

template<> struct __iseqsig_type<double>
{
  static int __call (double __x, double __y) throw ()
  {
    return __iseqsig (__x, __y);
  }
};

template<> struct __iseqsig_type<long double>
{
  static int __call (double __x, double __y) throw ()
  {
#  ifndef __NO_LONG_DOUBLE_MATH
    return __iseqsigl (__x, __y);
#  else
    return __iseqsig (__x, __y);
#  endif
  }
};

#  if __HAVE_FLOAT128_UNLIKE_LDBL
  /* When using an IEEE 128-bit long double, _Float128 is defined as long double
     in C++.  */
template<> struct __iseqsig_type<_Float128>
{
  static int __call (_Float128 __x, _Float128 __y) throw ()
  {
    return __iseqsigf128 (__x, __y);
  }
};
#  endif

template<typename _T1, typename _T2>
inline int
iseqsig (_T1 __x, _T2 __y) throw ()
{
#  if __cplusplus >= 201103L
  typedef decltype (__MATH_EVAL_FMT2 (__x, __y)) _T3;
#  else
  typedef __typeof (__MATH_EVAL_FMT2 (__x, __y)) _T3;
#  endif
  return __iseqsig_type<_T3>::__call (__x, __y);
}

} /* extern "C++" */
# endif /* __cplusplus */

#endif

__END_DECLS


#endif /* math.h  */