Bug 1043 - asinh in __math.h fails for negative arg
asinh in __math.h fails for negative arg
Status: CLOSED CURRENTRELEASE
Product: Red Hat Linux
Classification: Retired
Component: libc (Show other bugs)
5.0
i386 Linux
medium Severity medium
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Assigned To: David Lawrence
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Reported: 1999-02-04 14:22 EST by mcconnau
Modified: 2008-05-01 11:37 EDT (History)
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Last Closed: 1999-03-22 13:49:35 EST
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Description mcconnau 1999-02-04 14:22:06 EST
In /usr/include/__math.h  the function asinh fails for
negative arguments because __sgn1 is called before log1p.
The statement should be "return log1p (__y *__y /
(sqrt(__y * __y + 1.0) + 1.0) + __y) * __sgn1(__x);"
A more general problem with this file (or maybe it is the
compiler) is that when function arguments are given as long
double type, they get converted to temporary variables of
double type and then those are loaded onto the FPU.  This
can cause loss of precision and overflow.

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