Re: [Pharo-project] [squeak-dev] Fun with spock (NativeBoost FFI)
[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? Could I implement something that makes x a GMPfpWrapper if extra digits are supplied? e.g.: x := 3.14159265358979323846264338327950288419716939937510. x class ===> GMPfpWrapper. NativeBoost allows one to cascade calls to external libraries if you wrap them in assembly language in the method. High speed, aribrary-precision floating point complex number arithmetic, can be accomplished that way (no examples yet sorry, still learning) as well as more complicated stuff. I'm hoping to make a proof-of-concept mandlebrot set Morph that can zoom in arbitrarily. 32 bit floats limit the resolution terribly. So... What can be done to better integrate such libraries? I browsed the Parser and other classes but didn't understand what I was seeing well enough to figure out how to begin. L -- Squeak from the very start (introduction to Squeak and Pharo Smalltalk for the (almost) complete and compleate beginner). https://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=view_all
On 14 May 2012 00:03, Lawson English <lenglish5@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, Â x := Â 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?
Could I implement something that makes x a GMPfpWrapper if extra digits are supplied? e.g.:
x := 3.14159265358979323846264338327950288419716939937510.
x class ===> GMPfpWrapper.
NativeBoost allows one to cascade calls to external libraries if you wrap them in assembly language in the method. High speed, aribrary-precision floating point complex number arithmetic, can be accomplished that way (no examples yet sorry, still learning) as well as more complicated stuff. I'm hoping to make a proof-of-concept mandlebrot set Morph that can zoom in arbitrarily. 32 bit floats limit the resolution terribly.
So...
What can be done to better integrate such libraries? I browsed the Parser and other classes but didn't understand what I was seeing well enough to figure out how to begin.
See SqNumberParser. this is the guy who used by Parser to parse number literals.
L
-- Squeak from the very start (introduction to Squeak and Pharo Smalltalk for the (almost) complete and compleate beginner). https://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=view_all
-- Best regards, Igor Stasenko.
I am trying to implement an asString method for gmp floats but I don't quite see how. Prototype for getting a string is: "Function: char * mpf_get_str (char *str, mp_exp_t *expptr, int base, size_t n_digits, mpf_t op)" where mp_exp_t *expptr is just a pointer to a long, and size_t is just a long. I don't get how to set up the primitive call and how to evoke it in the asString method. -- Squeak from the very start (introduction to Squeak and Pharo Smalltalk for the (almost) complete and compleate beginner). https://www.youtube.com/playlist?list=PL6601A198DF14788D&feature=view_all
participants (2)
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Igor Stasenko -
Lawson English