1 // Stub definitions for float math.
3 // Copyright (C) 2001, 2002, 2003, 2009 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This 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
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
27 // For targets which do not have support for float versions,
28 // we use the following crude approximations. We keep saying that we'll do
29 // better later, but never do.
33 #ifndef _GLIBCXX_HAVE_FABSF
37 return (float) fabs(x);
41 #ifndef _GLIBCXX_HAVE_ACOSF
45 return (float) acos(x);
49 #ifndef _GLIBCXX_HAVE_ASINF
53 return (float) asin(x);
57 #ifndef _GLIBCXX_HAVE_ATANF
61 return (float) atan(x);
65 #ifndef _GLIBCXX_HAVE_ATAN2F
67 atan2f(float x, float y)
69 return (float) atan2(x, y);
73 #ifndef _GLIBCXX_HAVE_CEILF
77 return (float) ceil(x);
81 #ifndef _GLIBCXX_HAVE_COSF
85 return (float) cos(x);
89 #ifndef _GLIBCXX_HAVE_COSHF
93 return (float) cosh(x);
97 #ifndef _GLIBCXX_HAVE_EXPF
101 return (float) exp(x);
105 #ifndef _GLIBCXX_HAVE_FLOORF
109 return (float) floor(x);
113 #ifndef _GLIBCXX_HAVE_FMODF
115 fmodf(float x, float y)
117 return (float) fmod(x, y);
121 #ifndef _GLIBCXX_HAVE_FREXPF
123 frexpf(float x, int *exp)
125 return (float) frexp(x, exp);
129 #ifndef _GLIBCXX_HAVE_SQRTF
133 return (float) sqrt(x);
137 #ifndef _GLIBCXX_HAVE_HYPOTF
139 hypotf(float x, float y)
141 float s = fabsf(x) + fabsf(y);
145 return s * sqrtf(x * x + y * y);
149 #ifndef _GLIBCXX_HAVE_LDEXPF
151 ldexpf(float x, int exp)
153 return (float) ldexp(x, exp);
157 #ifndef _GLIBCXX_HAVE_LOGF
161 return (float) log(x);
165 #ifndef _GLIBCXX_HAVE_LOG10F
169 return (float) log10(x);
173 #ifndef _GLIBCXX_HAVE_MODFF
175 modff(float x, float *iptr)
179 result = modf(x, &temp);
180 *iptr = (float) temp;
181 return (float) result;
185 #ifndef _GLIBCXX_HAVE_POWF
187 powf(float x, float y)
189 return (float) pow(x, y);
193 #ifndef _GLIBCXX_HAVE_SINF
197 return (float) sin(x);
201 #ifndef _GLIBCXX_HAVE_SINHF
205 return (float) sinh(x);
209 #ifndef _GLIBCXX_HAVE_TANF
213 return (float) tan(x);
217 #ifndef _GLIBCXX_HAVE_TANHF
221 return (float) tanh(x);