qd: double-double and quad-double number type via libqd
This package supports both a double-double datatype (approx. 32 decimal digits) and a quad-double datatype (approx. 64 decimal digits), using libqd (which is implemented in C++ with C and Fortran wrappers). To compile this package you need libqd to be installed.
and Numeric.QD.DoubleDouble.DoubleDouble
are strict tuples of Numeric.QD.QuadDouble.QuadDouble
CDouble
s, with instances of:
, Eq
, Floating
, Fractional
, Num
, Ord
, Read
,
Real
, RealFloat
, RealFrac
, Show
, Storable
.Typeable
Additional note: libqd depends on 64bit doubles, while some FPU architectures use 80bit. It is highly recommended to compile with -fno-excess-precision and set the FPU control words to avoid erroneous behaviour, perhaps by doing something like this at the start of your program:
import Foreign (nullPtr) import GHC.Conc (forkOnIO, numCapabilities) import Numeric.QD.FPU.Raw (fpu_fix_start) main :: IO () main = do mapM_ (flip forkOnIO $ fpu_fix_start nullPtr) [ 0 .. numCapabilities - 1 ] -- ...
Modules
[Index]
Downloads
- qd-0.4.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
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Versions [RSS] | 0.1, 0.2, 0.4, 0.4.1, 1.0, 1.0.2.1 |
---|---|
Dependencies | base (>=4 && <5) [details] |
License | BSD-3-Clause |
Author | Claude Heiland-Allen |
Maintainer | claudiusmaximus@goto10.org |
Category | Math |
Uploaded | by ClaudeHeilandAllen at 2011-01-30T14:07:32Z |
Distributions | |
Reverse Dependencies | 2 direct, 0 indirect [details] |
Downloads | 4299 total (7 in the last 30 days) |
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Status | Docs uploaded by user Build status unknown [no reports yet] |