1/* Macros to control TS 18661-3 glibc features where the same 
2 definitions are appropriate for all platforms. 
3 Copyright (C) 2017-2020 Free Software Foundation, Inc. 
4 This file is part of the GNU C Library. 
5 
6 The GNU C Library is free software; you can redistribute it and/or 
7 modify it under the terms of the GNU Lesser General Public 
8 License as published by the Free Software Foundation; either 
9 version 2.1 of the License, or (at your option) any later version. 
10 
11 The GNU C Library is distributed in the hope that it will be useful, 
12 but WITHOUT ANY WARRANTY; without even the implied warranty of 
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
14 Lesser General Public License for more details. 
15 
16 You should have received a copy of the GNU Lesser General Public 
17 License along with the GNU C Library; if not, see 
18 <https://www.gnu.org/licenses/>. */ 
19 
20#ifndef _BITS_FLOATN_COMMON_H 
21#define _BITS_FLOATN_COMMON_H 
22 
23#include <features.h> 
24#include <bits/long-double.h> 
25 
26/* This header should be included at the bottom of each bits/floatn.h. 
27 It defines the following macros for each _FloatN and _FloatNx type, 
28 where the same definitions, or definitions based only on the macros 
29 in bits/floatn.h, are appropriate for all glibc configurations. */ 
30 
31/* Defined to 1 if the current compiler invocation provides a 
32 floating-point type with the right format for this type, and this 
33 glibc includes corresponding *fN or *fNx interfaces for it. */ 
34#define __HAVE_FLOAT16 0 
35#define __HAVE_FLOAT32 1 
36#define __HAVE_FLOAT64 1 
37#define __HAVE_FLOAT32X 1 
38#define __HAVE_FLOAT128X 0 
39 
40/* Defined to 1 if the corresponding __HAVE_<type> macro is 1 and the 
41 type is the first with its format in the sequence of (the default 
42 choices for) float, double, long double, _Float16, _Float32, 
43 _Float64, _Float128, _Float32x, _Float64x, _Float128x for this 
44 glibc; that is, if functions present once per floating-point format 
45 rather than once per type are present for this type. 
46 
47 All configurations supported by glibc have _Float32 the same format 
48 as float, _Float64 and _Float32x the same format as double, the 
49 _Float64x the same format as either long double or _Float128. No 
50 configurations support _Float128x or, as of GCC 7, have compiler 
51 support for a type meeting the requirements for _Float128x. */ 
52#define __HAVE_DISTINCT_FLOAT16 __HAVE_FLOAT16 
53#define __HAVE_DISTINCT_FLOAT32 0 
54#define __HAVE_DISTINCT_FLOAT64 0 
55#define __HAVE_DISTINCT_FLOAT32X 0 
56#define __HAVE_DISTINCT_FLOAT64X 0 
57#define __HAVE_DISTINCT_FLOAT128X __HAVE_FLOAT128X 
58 
59/* Defined to 1 if the corresponding _FloatN type is not binary compatible 
60 with the corresponding ISO C type in the current compilation unit as 
61 opposed to __HAVE_DISTINCT_FLOATN, which indicates the default types built 
62 in glibc. */ 
63#define __HAVE_FLOAT128_UNLIKE_LDBL (__HAVE_DISTINCT_FLOAT128 \ 
64 && __LDBL_MANT_DIG__ != 113) 
65 
66/* Defined to 1 if any _FloatN or _FloatNx types that are not 
67 ABI-distinct are however distinct types at the C language level (so 
68 for the purposes of __builtin_types_compatible_p and _Generic). */ 
69#if __GNUC_PREREQ (7, 0) && !defined __cplusplus 
70# define __HAVE_FLOATN_NOT_TYPEDEF 1 
71#else 
72# define __HAVE_FLOATN_NOT_TYPEDEF 0 
73#endif 
74 
75#ifndef __ASSEMBLER__ 
76 
77/* Defined to concatenate the literal suffix to be used with _FloatN 
78 or _FloatNx types, if __HAVE_<type> is 1. The corresponding 
79 literal suffixes exist since GCC 7, for C only. */ 
80# if __HAVE_FLOAT16 
81# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
82/* No corresponding suffix available for this type. */ 
83# define __f16(x) ((_Float16) x##f) 
84# else 
85# define __f16(x) x##f16 
86# endif 
87# endif 
88 
89# if __HAVE_FLOAT32 
90# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
91# define __f32(x) x##f 
92# else 
93# define __f32(x) x##f32 
94# endif 
95# endif 
96 
97# if __HAVE_FLOAT64 
98# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
99# ifdef __NO_LONG_DOUBLE_MATH 
100# define __f64(x) x##l 
101# else 
102# define __f64(x) x 
103# endif 
104# else 
105# define __f64(x) x##f64 
106# endif 
107# endif 
108 
109# if __HAVE_FLOAT32X 
110# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
111# define __f32x(x) x 
112# else 
113# define __f32x(x) x##f32x 
114# endif 
115# endif 
116 
117# if __HAVE_FLOAT64X 
118# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
119# if __HAVE_FLOAT64X_LONG_DOUBLE 
120# define __f64x(x) x##l 
121# else 
122# define __f64x(x) __f128 (x) 
123# endif 
124# else 
125# define __f64x(x) x##f64x 
126# endif 
127# endif 
128 
129# if __HAVE_FLOAT128X 
130# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
131# error "_Float128X supported but no constant suffix" 
132# else 
133# define __f128x(x) x##f128x 
134# endif 
135# endif 
136 
137/* Defined to a complex type if __HAVE_<type> is 1. */ 
138# if __HAVE_FLOAT16 
139# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
140typedef _Complex float __cfloat16 __attribute__ ((__mode__ (__HC__))); 
141# define __CFLOAT16 __cfloat16 
142# else 
143# define __CFLOAT16 _Complex _Float16 
144# endif 
145# endif 
146 
147# if __HAVE_FLOAT32 
148# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
149# define __CFLOAT32 _Complex float 
150# else 
151# define __CFLOAT32 _Complex _Float32 
152# endif 
153# endif 
154 
155# if __HAVE_FLOAT64 
156# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
157# ifdef __NO_LONG_DOUBLE_MATH 
158# define __CFLOAT64 _Complex long double 
159# else 
160# define __CFLOAT64 _Complex double 
161# endif 
162# else 
163# define __CFLOAT64 _Complex _Float64 
164# endif 
165# endif 
166 
167# if __HAVE_FLOAT32X 
168# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
169# define __CFLOAT32X _Complex double 
170# else 
171# define __CFLOAT32X _Complex _Float32x 
172# endif 
173# endif 
174 
175# if __HAVE_FLOAT64X 
176# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
177# if __HAVE_FLOAT64X_LONG_DOUBLE 
178# define __CFLOAT64X _Complex long double 
179# else 
180# define __CFLOAT64X __CFLOAT128 
181# endif 
182# else 
183# define __CFLOAT64X _Complex _Float64x 
184# endif 
185# endif 
186 
187# if __HAVE_FLOAT128X 
188# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
189# error "_Float128X supported but no complex type" 
190# else 
191# define __CFLOAT128X _Complex _Float128x 
192# endif 
193# endif 
194 
195/* The remaining of this file provides support for older compilers. */ 
196# if __HAVE_FLOAT16 
197 
198# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
199typedef float _Float16 __attribute__ ((__mode__ (__HF__))); 
200# endif 
201 
202# if !__GNUC_PREREQ (7, 0) 
203# define __builtin_huge_valf16() ((_Float16) __builtin_huge_val ()) 
204# define __builtin_inff16() ((_Float16) __builtin_inf ()) 
205# define __builtin_nanf16(x) ((_Float16) __builtin_nan (x)) 
206# define __builtin_nansf16(x) ((_Float16) __builtin_nans (x)) 
207# endif 
208 
209# endif 
210 
211# if __HAVE_FLOAT32 
212 
213# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
214typedef float _Float32; 
215# endif 
216 
217# if !__GNUC_PREREQ (7, 0) 
218# define __builtin_huge_valf32() (__builtin_huge_valf ()) 
219# define __builtin_inff32() (__builtin_inff ()) 
220# define __builtin_nanf32(x) (__builtin_nanf (x)) 
221# define __builtin_nansf32(x) (__builtin_nansf (x)) 
222# endif 
223 
224# endif 
225 
226# if __HAVE_FLOAT64 
227 
228/* If double, long double and _Float64 all have the same set of 
229 values, TS 18661-3 requires the usual arithmetic conversions on 
230 long double and _Float64 to produce _Float64. For this to be the 
231 case when building with a compiler without a distinct _Float64 
232 type, _Float64 must be a typedef for long double, not for 
233 double. */ 
234 
235# ifdef __NO_LONG_DOUBLE_MATH 
236 
237# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
238typedef long double _Float64; 
239# endif 
240 
241# if !__GNUC_PREREQ (7, 0) 
242# define __builtin_huge_valf64() (__builtin_huge_vall ()) 
243# define __builtin_inff64() (__builtin_infl ()) 
244# define __builtin_nanf64(x) (__builtin_nanl (x)) 
245# define __builtin_nansf64(x) (__builtin_nansl (x)) 
246# endif 
247 
248# else 
249 
250# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
251typedef double _Float64; 
252# endif 
253 
254# if !__GNUC_PREREQ (7, 0) 
255# define __builtin_huge_valf64() (__builtin_huge_val ()) 
256# define __builtin_inff64() (__builtin_inf ()) 
257# define __builtin_nanf64(x) (__builtin_nan (x)) 
258# define __builtin_nansf64(x) (__builtin_nans (x)) 
259# endif 
260 
261# endif 
262 
263# endif 
264 
265# if __HAVE_FLOAT32X 
266 
267# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
268typedef double _Float32x; 
269# endif 
270 
271# if !__GNUC_PREREQ (7, 0) 
272# define __builtin_huge_valf32x() (__builtin_huge_val ()) 
273# define __builtin_inff32x() (__builtin_inf ()) 
274# define __builtin_nanf32x(x) (__builtin_nan (x)) 
275# define __builtin_nansf32x(x) (__builtin_nans (x)) 
276# endif 
277 
278# endif 
279 
280# if __HAVE_FLOAT64X 
281 
282# if __HAVE_FLOAT64X_LONG_DOUBLE 
283 
284# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
285typedef long double _Float64x; 
286# endif 
287 
288# if !__GNUC_PREREQ (7, 0) 
289# define __builtin_huge_valf64x() (__builtin_huge_vall ()) 
290# define __builtin_inff64x() (__builtin_infl ()) 
291# define __builtin_nanf64x(x) (__builtin_nanl (x)) 
292# define __builtin_nansf64x(x) (__builtin_nansl (x)) 
293# endif 
294 
295# else 
296 
297# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
298typedef _Float128 _Float64x; 
299# endif 
300 
301# if !__GNUC_PREREQ (7, 0) 
302# define __builtin_huge_valf64x() (__builtin_huge_valf128 ()) 
303# define __builtin_inff64x() (__builtin_inff128 ()) 
304# define __builtin_nanf64x(x) (__builtin_nanf128 (x)) 
305# define __builtin_nansf64x(x) (__builtin_nansf128 (x)) 
306# endif 
307 
308# endif 
309 
310# endif 
311 
312# if __HAVE_FLOAT128X 
313 
314# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
315# error "_Float128x supported but no type" 
316# endif 
317 
318# if !__GNUC_PREREQ (7, 0) 
319# define __builtin_huge_valf128x() ((_Float128x) __builtin_huge_val ()) 
320# define __builtin_inff128x() ((_Float128x) __builtin_inf ()) 
321# define __builtin_nanf128x(x) ((_Float128x) __builtin_nan (x)) 
322# define __builtin_nansf128x(x) ((_Float128x) __builtin_nans (x)) 
323# endif 
324 
325# endif 
326 
327#endif /* !__ASSEMBLER__. */ 
328 
329#endif /* _BITS_FLOATN_COMMON_H */ 
330