1 /* Macros to control TS 18661-3 glibc features on ia64. 2 Copyright (C) 2017-2021 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. */ 29 #if __GNUC_PREREQ (4, 4) 30 # define __HAVE_FLOAT128 1 31 #else 32 # define __HAVE_FLOAT128 0 33 #endif 34 35 /* Defined to 1 if __HAVE_FLOAT128 is 1 and the type is ABI-distinct 36 from the default float, double and long double types in this glibc. */ 37 #if __HAVE_FLOAT128 38 # define __HAVE_DISTINCT_FLOAT128 1 39 #else 40 # define __HAVE_DISTINCT_FLOAT128 0 41 #endif 42 43 /* Defined to 1 if the current compiler invocation provides a 44 floating-point type with the right format for _Float64x, and this 45 glibc includes corresponding *f64x interfaces for it. */ 46 #define __HAVE_FLOAT64X 1 47 48 /* Defined to 1 if __HAVE_FLOAT64X is 1 and _Float64x has the format 49 of long double. Otherwise, if __HAVE_FLOAT64X is 1, _Float64x has 50 the format of _Float128, which must be different from that of long 51 double. */ 52 #define __HAVE_FLOAT64X_LONG_DOUBLE 1 53 54 #ifndef __ASSEMBLER__ 55 56 /* Defined to concatenate the literal suffix to be used with _Float128 57 types, if __HAVE_FLOAT128 is 1. */ 58 # if __HAVE_FLOAT128 59 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus 60 /* The literal suffix f128 exists only since GCC 7.0. */ 61 # define __f128(x) x##q 62 # else 63 # define __f128(x) x##f128 64 # endif 65 # endif 66 67 /* Defined to a complex binary128 type if __HAVE_FLOAT128 is 1. */ 68 # if __HAVE_FLOAT128 69 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus 70 /* Add a typedef for older GCC compilers which don't natively support 71 _Complex _Float128. */ 72 typedef _Complex float __cfloat128 __attribute__ ((__mode__ (__TC__))); 73 # define __CFLOAT128 __cfloat128 74 # else 75 # define __CFLOAT128 _Complex _Float128 76 # endif 77 # endif 78 79 /* The remaining of this file provides support for older compilers. */ 80 # if __HAVE_FLOAT128 81 82 /* The type _Float128 exists only since GCC 7.0. */ 83 # if !__GNUC_PREREQ (7, 0) || defined __cplusplus 84 typedef __float128 _Float128; 85 # endif 86 87 /* __builtin_huge_valf128 doesn't exist before GCC 7.0. */ 88 # if !__GNUC_PREREQ (7, 0) 89 # define __builtin_huge_valf128() ((_Float128) __builtin_huge_val ()) 90 # endif 91 92 /* Older GCC has only a subset of built-in functions for _Float128 on 93 ia64, and __builtin_infq is not usable in static initializers. 94 Converting a narrower sNaN to _Float128 produces a quiet NaN, so 95 attempts to use _Float128 sNaNs will not work properly with older 96 compilers. */ 97 # if !__GNUC_PREREQ (7, 0) 98 # define __builtin_copysignf128 __builtin_copysignq 99 # define __builtin_fabsf128 __builtin_fabsq 100 # define __builtin_inff128() ((_Float128) __builtin_inf ()) 101 # define __builtin_nanf128(x) ((_Float128) __builtin_nan (x)) 102 # define __builtin_nansf128(x) ((_Float128) __builtin_nans (x)) 103 # endif 104 105 /* In math/math.h, __MATH_TG will expand signbit to __builtin_signbit*, 106 e.g.: __builtin_signbitf128, before GCC 6. However, there has never 107 been a __builtin_signbitf128 in GCC and the type-generic builtin is 108 only available since GCC 6. */ 109 # if !__GNUC_PREREQ (6, 0) 110 # define __builtin_signbitf128 __signbitf128 111 # endif 112 113 # endif 114 115 #endif /* !__ASSEMBLER__. */ 116 117 #include <bits/floatn-common.h> 118 119 #endif /* _BITS_FLOATN_H */ 120