1 /* Inline math functions for s390.
2 Copyright (C) 2004, 2007 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 # error "Never use <bits/mathinline.h> directly; include <math.h> instead."
24 #ifndef __extern_inline
25 # define __MATH_INLINE __inline
27 # define __MATH_INLINE __extern_inline
30 #if (!defined __NO_MATH_INLINES || defined __LIBC_INTERNAL_MATH_INLINES) \
31 && defined __OPTIMIZE__
35 /* Test for negative number. Used in the signbit() macro. */
37 __NTH (__signbitf (float __x
))
39 __extension__
union { float __f
; int __i
; } __u
= { __f
: __x
};
44 __NTH (__signbit (double __x
))
46 __extension__
union { double __d
; long __i
; } __u
= { __d
: __x
};
50 # ifndef __NO_LONG_DOUBLE_MATH
52 __NTH (__signbitl (long double __x
))
54 __extension__
union { long double __l
; int __i
[4]; } __u
= { __l
: __x
};
55 return __u
.__i
[0] < 0;
59 __NTH (__signbitl (long double __x
))
61 return __signbit ((double) __x
);
67 /* This code is used internally in the GNU libc. */
68 #ifdef __LIBC_INTERNAL_MATH_INLINES
71 __NTH (__ieee754_sqrt (double x
))
75 asm ( "sqdbr %0,%1" : "=f" (res
) : "f" (x
) );
80 __NTH (__ieee754_sqrtf (float x
))
84 asm ( "sqebr %0,%1" : "=f" (res
) : "f" (x
) );
88 # if !defined __NO_LONG_DOUBLE_MATH
89 __MATH_INLINE
long double
90 __NTH (sqrtl (long double __x
))
94 asm ( "sqxbr %0,%1" : "=f" (res
) : "f" (__x
) );
97 # endif /* !__NO_LONG_DOUBLE_MATH */
99 #endif /* __LIBC_INTERNAL_MATH_INLINES */
101 #endif /* __NO_MATH_INLINES */