1/* Macros to control TS 18661-3 glibc features on x86. 
2 Copyright (C) 2017-2020 Free Software Foundation, Inc. 
3 This file is part of the GNU C Library. 
4 
5 The GNU C Library is free software; you can redistribute it and/or 
6 modify it under the terms of the GNU Lesser General Public 
7 License as published by the Free Software Foundation; either 
8 version 2.1 of the License, or (at your option) any later version. 
9 
10 The GNU C Library 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 GNU 
13 Lesser General Public License for more details. 
14 
15 You should have received a copy of the GNU Lesser General Public 
16 License along with the GNU C Library; if not, see 
17 <https://www.gnu.org/licenses/>. */ 
18 
19#ifndef _BITS_FLOATN_H 
20#define _BITS_FLOATN_H 
21 
22#include <features.h> 
23 
24/* Defined to 1 if the current compiler invocation provides a 
25 floating-point type with the IEEE 754 binary128 format, and this 
26 glibc includes corresponding *f128 interfaces for it. The required 
27 libgcc support was added some time after the basic compiler 
28 support, for x86_64 and x86. */ 
29#if (defined __x86_64__ \ 
30 ? __GNUC_PREREQ (4, 3) \ 
31 : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4))) \ 
32 && !defined(__CUDACC__) && !defined(__ICC) 
33# define __HAVE_FLOAT128 1 
34#else 
35# define __HAVE_FLOAT128 0 
36#endif 
37 
38/* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct 
39 from the default float, double and long double types in this glibc. */ 
40#if __HAVE_FLOAT128 
41# define __HAVE_DISTINCT_FLOAT128 1 
42#else 
43# define __HAVE_DISTINCT_FLOAT128 0 
44#endif 
45 
46/* Defined to 1 if the current compiler invocation provides a 
47 floating-point type with the right format for _Float64x, and this 
48 glibc includes corresponding *f64x interfaces for it. */ 
49#define __HAVE_FLOAT64X 1 
50 
51/* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format 
52 of long double. Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has 
53 the format of _Float128, which must be different from that of long 
54 double. */ 
55#define __HAVE_FLOAT64X_LONG_DOUBLE 1 
56 
57#ifndef __ASSEMBLER__ 
58 
59/* Defined to concatenate the literal suffix to be used with _Float128 
60 types, if __HAVE_FLOAT128 is 1. */ 
61# if __HAVE_FLOAT128 
62# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
63/* The literal suffix f128 exists only since GCC 7.0. */ 
64# define __f128(x) x##q 
65# else 
66# define __f128(x) x##f128 
67# endif 
68# endif 
69 
70/* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */ 
71# if __HAVE_FLOAT128 
72# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
73/* Add a typedef for older GCC compilers which don't natively support 
74 _Complex _Float128. */ 
75typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__))); 
76# define __CFLOAT128 __cfloat128 
77# else 
78# define __CFLOAT128 _Complex _Float128 
79# endif 
80# endif 
81 
82/* The remaining of this file provides support for older compilers. */ 
83# if __HAVE_FLOAT128 
84 
85/* The type _Float128 exists only since GCC 7.0. */ 
86# if !__GNUC_PREREQ (7, 0) || defined __cplusplus 
87typedef __float128 _Float128; 
88# endif 
89 
90/* __builtin_huge_valf128 doesn't exist before GCC 7.0. */ 
91# if !__GNUC_PREREQ (7, 0) 
92# define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ()) 
93# endif 
94 
95/* Older GCC has only a subset of built-in functions for _Float128 on 
96 x86, and __builtin_infq is not usable in static initializers. 
97 Converting a narrower sNaN to _Float128 produces a quiet NaN, so 
98 attempts to use _Float128 sNaNs will not work properly with older 
99 compilers. */ 
100# if !__GNUC_PREREQ (7, 0) 
101# define __builtin_copysignf128 __builtin_copysignq 
102# define __builtin_fabsf128 __builtin_fabsq 
103# define __builtin_inff128() ((_Float128) __builtin_inf ()) 
104# define __builtin_nanf128(x) ((_Float128) __builtin_nan (x)) 
105# define __builtin_nansf128(x) ((_Float128) __builtin_nans (x)) 
106# endif 
107 
108/* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*, 
109 e.g.: __builtin_signbitf128, before GCC 6. However, there has never 
110 been a __builtin_signbitf128 in GCC and the type-generic builtin is 
111 only available since GCC 6. */ 
112# if !__GNUC_PREREQ (6, 0) 
113# define __builtin_signbitf128 __signbitf128 
114# endif 
115 
116# endif 
117 
118#endif /* !__ASSEMBLER__. */ 
119 
120#include <bits/floatn-common.h> 
121 
122#endif /* _BITS_FLOATN_H */ 
123