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authorDenis Vlasenko <vda.linux@googlemail.com>2009-02-11 17:37:21 (GMT)
committerDenis Vlasenko <vda.linux@googlemail.com>2009-02-11 17:37:21 (GMT)
commit5d53cce4c05d1f4f730cce080233dc959f773059 (patch)
tree1946111a30890c20efd571d5f9228c0f1fc55158 /libm/s_finitef.c
parenteb856014a03f49e132d852d6f1627db64d3abd7a (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_finitef.c')
-rw-r--r--libm/s_finitef.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/libm/s_finitef.c b/libm/s_finitef.c
index b7c853d..b427ea6 100644
--- a/libm/s_finitef.c
+++ b/libm/s_finitef.c
@@ -23,8 +23,11 @@
int __finitef(float x)
{
- int32_t ix;
- GET_FLOAT_WORD(ix,x);
- return (int)((u_int32_t)((ix&0x7fffffff)-0x7f800000)>>31);
+ u_int32_t ix;
+
+ GET_FLOAT_WORD(ix, x);
+ /* Finite numbers have at least one zero bit in exponent. */
+ /* All other numbers will result in 0xffffffff after OR: */
+ return (ix | 0x807fffff) != 0xffffffff;
}
libm_hidden_def(__finitef)