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-rw-r--r--math/s_clogf.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/math/s_clogf.c b/math/s_clogf.c
index 088730c..92f782c 100644
--- a/math/s_clogf.c
+++ b/math/s_clogf.c
@@ -78,6 +78,13 @@ __clogf (__complex__ float x)
else
__real__ result = __log1pf (absy2) / 2.0f;
}
+ else if (absx > 1.0f && absx < 2.0f && absy < 1.0f && scale == 0)
+ {
+ float d2m1 = (absx - 1.0f) * (absx + 1.0f);
+ if (absy >= FLT_EPSILON)
+ d2m1 += absy * absy;
+ __real__ result = __log1pf (d2m1) / 2.0f;
+ }
else
{
float d = __ieee754_hypotf (absx, absy);