[Haskell-cafe] Data.Complex.magnitude slow?
sk at k-hornz.de
Fri Jul 18 13:56:48 EDT 2008
On 18.07.2008, at 19:47, Don Stewart wrote:
>> On 17.07.2008, at 21:46, Lennart Augustsson wrote:
>>> If scaleFloat and exponent are implemented with bit twiddling
>>> they can
>>> be quite fast.
>> is there a way in ghc to 'cast' between float/int32 and double/int64
>> (without going through memory)?
> "fromIntegral/Int->Float" fromIntegral = int2Float
> "truncate/Float->Int" truncate = float2Int
> "truncate/Double->Int" truncate = double2Int
> with appropriate no-op fromIntegrals for the 32 and 64 variants.
i actually meant something like *(uint32_t*)fptr, but thanks anyway ;)
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