From 5d53cce4c05d1f4f730cce080233dc959f773059 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Wed, 11 Feb 2009 17:37:21 +0000 Subject: 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...) --- libm/s_finite.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'libm/s_finite.c') 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) -- cgit v1.2.3