[Pharo-project] [squeak-dev] Fun with spock (NativeBoost FFI)

Marcus Denker marcus.denker at inria.fr
Mon May 14 07:06:36 UTC 2012


On May 14, 2012, at 12:49 AM, Igor Stasenko wrote:

> On 14 May 2012 00:03, Lawson English <lenglish5 at cox.net> wrote:
>> [pharo-project list added back in]
>> 
>> 
>> On 5/13/12 1:34 PM, Nicolas Cellier wrote:
>>> 
>>> [100000 primeSwingFactorial] timeToRun 3411 [100000 factorial] timeToRun
>>> 61219 So gmp is still 40x faster than a reasonably optimized Smalltalk
>>> factorial... I think that's fair, because gmp is highly optimized. Since
>>> cost is dominated by LargeInteger arithmetic, and since Smalltalk
>>> LargeInteger arithmetic in primitives still operates on bytes, I'm not so
>>> surprised of the gap... I'd like to see a 64bit image operating on 32 bits
>>> positive integers digits, that would already be a progress... Nicolas
>> 
>> 
>> For me, the most interesting thing would be to figure out how to integrate
>> such external libraries more tightly into the language syntax.
>> 
>> Right now,   x :=  3.14159... always creates a Float, which is stored as a
>> double.
>> 
>> x class ===> Float.
>> 
>> What if I wanted to generate a gmplib floating point number (or rational or
>> large integer) automatically when the gmplib binding is available?
For Floats, there is a GNU project maintained by some groups at Inria:
	
	http://www.mpfr.org/

The main goal of MPFR is to provide a library for multiple-precision floating-point computation which is both 
efficient and has a well-defined semantics. It copies the good ideas from the ANSI/IEEE-754 standard for 
double-precision floating-point arithmetic (53-bit significand).



--
Marcus Denker -- http://marcusdenker.de



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