diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/bits/mathinline.h')
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/mathinline.h | 35 |
1 files changed, 28 insertions, 7 deletions
diff --git a/sysdeps/x86_64/fpu/bits/mathinline.h b/sysdeps/x86_64/fpu/bits/mathinline.h index 08e1c5b1da..c77412d28d 100644 --- a/sysdeps/x86_64/fpu/bits/mathinline.h +++ b/sysdeps/x86_64/fpu/bits/mathinline.h @@ -1,5 +1,5 @@ /* Inline math functions for x86-64. - Copyright (C) 2002 Free Software Foundation, Inc. + Copyright (C) 2002, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 2002. @@ -31,10 +31,31 @@ #if defined __USE_ISOC99 && defined __GNUC__ && __GNUC__ >= 2 /* GCC has builtins that can be used. */ -# define isgreater(x, y) __builtin_isgreater (x, y) -# define isgreaterequal(x, y) __builtin_isgreaterequal (x, y) -# define isless(x, y) __builtin_isless (x, y) -# define islessequal(x, y) __builtin_islessequal (x, y) -# define islessgreater(x, y) __builtin_islessgreater (x, y) -# define isunordered(x, y) __builtin_isunordered (x, y) +# define isgreater(x, y) __builtin_isgreater (x, y) +# define isgreaterequal(x, y) __builtin_isgreaterequal (x, y) +# define isless(x, y) __builtin_isless (x, y) +# define islessequal(x, y) __builtin_islessequal (x, y) +# define islessgreater(x, y) __builtin_islessgreater (x, y) +# define isunordered(x, y) __builtin_isunordered (x, y) + + +/* Test for negative number. Used in the signbit() macro. */ +__MATH_INLINE int +__signbitf (float __x) __THROW +{ + __extension__ union { float __f; int __i; } __u = { __f: __x }; + return __u.__i < 0; +} +__MATH_INLINE int +__signbit (double __x) __THROW +{ + __extension__ union { double __d; int __i[2]; } __u = { __d: __x }; + return __u.__i[1] < 0; +} +__MATH_INLINE int +__signbitl (long double __x) __THROW +{ + __extension__ union { long double __l; int __i[3]; } __u = { __l: __x }; + return (__u.__i[2] & 0x8000) != 0; +} #endif |