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authorLiubov Dmitrieva <liubov.dmitrieva@gmail.com>2012-09-25 20:41:17 +0200
committerAndreas Jaeger <aj@suse.de>2012-09-25 20:41:17 +0200
commit6d3bf1993190edc502d01e8ca42c4482b20a5b6c (patch)
treeceef4ffabe768f560a3a4d3f6b556b7b70aac37d /math/s_cexp.c
parent203e56032f77d0b36701deaee360e9cdda35d54e (diff)
downloadglibc-6d3bf1993190edc502d01e8ca42c4482b20a5b6c.tar.gz
Fix wrong ussage of sincos for subnormal arguments
Diffstat (limited to 'math/s_cexp.c')
-rw-r--r--math/s_cexp.c20
1 files changed, 18 insertions, 2 deletions
diff --git a/math/s_cexp.c b/math/s_cexp.c
index 1d7a5a2c40..d0a95ba79c 100644
--- a/math/s_cexp.c
+++ b/math/s_cexp.c
@@ -39,7 +39,15 @@ __cexp (__complex__ double x)
const int t = (int) ((DBL_MAX_EXP - 1) * M_LN2);
double sinix, cosix;
- __sincos (__imag__ x, &sinix, &cosix);
+ if (__builtin_expect (icls != FP_SUBNORMAL, 1))
+ {
+ __sincos (__imag__ x, &sinix, &cosix);
+ }
+ else
+ {
+ sinix = __imag__ x;
+ cosix = 1.0;
+ }
if (__real__ x > t)
{
@@ -95,7 +103,15 @@ __cexp (__complex__ double x)
{
double sinix, cosix;
- __sincos (__imag__ x, &sinix, &cosix);
+ if (__builtin_expect (icls != FP_SUBNORMAL, 1))
+ {
+ __sincos (__imag__ x, &sinix, &cosix);
+ }
+ else
+ {
+ sinix = __imag__ x;
+ cosix = 1.0;
+ }
__real__ retval = __copysign (value, cosix);
__imag__ retval = __copysign (value, sinix);