diff options
| author | Denis Vlasenko <vda.linux@googlemail.com> | 2009-02-11 17:37:21 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2009-02-11 17:37:21 +0000 |
| commit | 5d53cce4c05d1f4f730cce080233dc959f773059 (patch) | |
| tree | 1946111a30890c20efd571d5f9228c0f1fc55158 /libc/sysdeps | |
| parent | eb856014a03f49e132d852d6f1627db64d3abd7a (diff) | |
docs/probe_math_exception.c:
update example
libc/sysdeps/linux/i386/bits/mathinline.h:
improve __finite() macro, add __finitef macro
(why they aren't always macros? why aren't they arch independent?)
libm/math_private.h:
much better comments on math_opt_barrier() and math_force_eval()
libm/s_finite[f].c:
improve out-of-line __finite[f]() too (one byte less, yay...)
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/i386/bits/mathinline.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/libc/sysdeps/linux/i386/bits/mathinline.h b/libc/sysdeps/linux/i386/bits/mathinline.h index ca7277d76..5caf73353 100644 --- a/libc/sysdeps/linux/i386/bits/mathinline.h +++ b/libc/sysdeps/linux/i386/bits/mathinline.h @@ -713,11 +713,22 @@ __inline_mathcodeNP2 (drem, __x, __y, \ __MATH_INLINE int __NTH (__finite (double __x)) { - return (__extension__ - (((((union { double __d; int __i[2]; }) {__d: __x}).__i[1] - | 0x800fffffu) + 1) >> 31)); + union { double __d; int __i[2]; } u; + u.__d = __x; + /* Finite numbers have at least one zero bit in exponent. */ + /* All other numbers will result in 0xffffffff after OR: */ + return (u.__i[1] | 0x800fffff) != 0xffffffff; } +__MATH_INLINE int +__NTH (__finitef (float __x)) +{ + union { float __d; int __i; } u; + u.__d = __x; + return (u.__i | 0x807fffff) != 0xffffffff; +} + + /* Miscellaneous functions */ # ifdef __FAST_MATH__ __inline_mathcode (__coshm1, __x, \ |