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Accurate Portable Mathematical Library
�Project Description
The IBM accurate portable mathematical library (IBM APMathLib) consists
of routines that compute some of
the standard common transcendental functions.
The computed results are the exact theoretical values correctly rounded (nearest or even) to
the closest number representable by the IEEE 754 double format.
The computations are bit-by-bit compatible upon porting among the supported platforms. Currently the
supported platforms/compilers are: x86/Linux/gcc, x86/NT/[gcc| cl], Sparc/Solaris/gcc,�
PowerPC/AIX[32bit | 64bit]/[gcc | xlc].
Currently, the available routines are:
uatan, uatan2, uasin,uacos, uexp, ulog, upow, usin, ucos, utan,usqrt, uremainder,�
which may replace the standard functions atan(), atan2, asin(), acos() etc.
Additional routines will be added later.
Unlike the standard library routines, the accurate portable routines' return values are�
THE EXACT THEORETICAL return values CORRECTLY ROUNDED to the nearest
value representable by the IEEE 754 double format.
If the theoretical result is equally distant from two neighboring IEEE 754 values,
the functions return the "even" of the two.
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Developing APMathLib
�This project is licensed under the Gnu
Lesser General Public License.
If there's a feature that you'd like to see added to APMathLib, you are welcome to contribute.
Since MahtLib is an open source project, it's easy to get involved.
The developer web page located in IBM's
developerWorks Open Source Software zone.
MathLib��Team�
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Please send web page
comments to MAIL� |
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