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Diffstat (limited to 'sysdeps/libm-ieee754/s_cexp.c')
-rw-r--r--sysdeps/libm-ieee754/s_cexp.c32
1 files changed, 23 insertions, 9 deletions
diff --git a/sysdeps/libm-ieee754/s_cexp.c b/sysdeps/libm-ieee754/s_cexp.c
index 233a40014f..f6b443ddba 100644
--- a/sysdeps/libm-ieee754/s_cexp.c
+++ b/sysdeps/libm-ieee754/s_cexp.c
@@ -33,8 +33,16 @@ __cexp (__complex__ double x)
{
double exp_val = __exp (__real__ x);
- __real__ retval = exp_val * __cos (__imag__ x);
- __imag__ retval = exp_val * __sin (__imag__ x);
+ if (isfinite (exp_val))
+ {
+ __real__ retval = exp_val * __cos (__imag__ x);
+ __imag__ retval = exp_val * __sin (__imag__ x);
+ }
+ else
+ {
+ __real__ retval = __copysign (exp_val, __cos (__imag__ x));
+ __imag__ retval = __copysign (exp_val, __sin (__imag__ x));
+ }
}
else
{
@@ -48,14 +56,17 @@ __cexp (__complex__ double x)
{
if (isfinite (__imag__ x))
{
- if (signbit (__real__ x) == 0 && __imag__ x == 0.0)
- retval = HUGE_VAL;
+ double value = signbit (__real__ x) ? 0.0 : HUGE_VAL;
+
+ if (__imag__ x == 0.0)
+ {
+ __real__ retval = value;
+ __imag__ retval = __imag__ x;
+ }
else
{
- double value = signbit (__real__ x) ? 0.0 : HUGE_VAL;
-
- __real__ retval = value * __cos (__imag__ x);
- __imag__ retval = value * __sin (__imag__ x);
+ __real__ retval = __copysign (value, __cos (__imag__ x));
+ __imag__ retval = __copysign (value, __sin (__imag__ x));
}
}
else if (signbit (__real__ x) == 0)
@@ -64,7 +75,10 @@ __cexp (__complex__ double x)
__imag__ retval = __nan ("");
}
else
- retval = 0.0;
+ {
+ __real__ retval = 0.0;
+ __imag__ retval = __copysign (0.0, __imag__ x);
+ }
}
else
{