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 /libm/s_finite.c | |
| 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 'libm/s_finite.c')
| -rw-r--r-- | libm/s_finite.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/libm/s_finite.c b/libm/s_finite.c index 50fc11b50..9bbc00286 100644 --- a/libm/s_finite.c +++ b/libm/s_finite.c @@ -22,8 +22,11 @@ int __finite(double x) { - int32_t hx; - GET_HIGH_WORD(hx,x); - return (int)((u_int32_t)((hx&0x7fffffff)-0x7ff00000)>>31); + u_int32_t hx; + + GET_HIGH_WORD(hx, x); + /* Finite numbers have at least one zero bit in exponent. */ + /* All other numbers will result in 0xffffffff after OR: */ + return (hx | 0x800fffff) != 0xffffffff; } libm_hidden_def(__finite) |