Ciao Niels, ciao Paul!
Il Lun, 17 Dicembre 2012 9:07 pm, Niels Möller ha scritto:
Zimmermann Paul paul.zimmerm...@loria.fr writes:
frite% gcc -I$GMP/include -O2 -g e.c $GMP/lib/libgmp.a
frite% ./a.out
GMP: header 5.0.5, library 5.0.5
mpz_jacobi: 408ms
frite% gcc -I/tmp/include -O2 -g
ni...@lysator.liu.se (Niels Möller) writes:
Zimmermann Paul paul.zimmerm...@loria.fr writes:
I'm glad you asked (on the AMD processor):
frite% gcc -I$GMP/include -O2 -g e.c $GMP/lib/libgmp.a
frite% ./a.out
GMP: header 5.0.5, library 5.0.5
mpz_jacobi: 408ms
Hi,
I wonder why there are some ui/si variants for mpz_kronecker, but not for the
simpler functions mpz_jacobi and mpz_legendre.
Assume one wants to compute the Legendre symbol (A/P) for P an unsigned long
(and A too). What is more efficient?
1) use mpz_kronecker_ui, which forces to
Zimmermann Paul paul.zimmerm...@loria.fr writes:
I wonder why there are some ui/si variants for mpz_kronecker, but not for the
simpler functions mpz_jacobi and mpz_legendre.
Ah, and one other comment. In GMP, mpz_kronecker, mpz_jacobi and
mpz_legendre are all different names for the same
Niels,
From: ni...@lysator.liu.se (Niels Möller)
Date: Mon, 17 Dec 2012 16:53:52 +0100
Zimmermann Paul paul.zimmerm...@loria.fr writes:
Assume one wants to compute the Legendre symbol (A/P) for P an unsigned long
(and A too). What is more efficient?
1) use mpz_kronecker_ui,
Zimmermann Paul paul.zimmerm...@loria.fr writes:
by the way, here are some timings on a 2.27Ghz Intel Xeon L5640 with GMP
5.0.5:
Note that large parts of the jacobi code is replaced in the imminent 5.1
release. So it might be interesting to benchmark also the latest code.
Regards,
/Niels
--
Niels,
Note that large parts of the jacobi code is replaced in the imminent 5.1
release. So it might be interesting to benchmark also the latest code.
I'm glad you asked (on the AMD processor):
frite% gcc -I$GMP/include -O2 -g e.c $GMP/lib/libgmp.a
frite% ./a.out
GMP: header 5.0.5,
Zimmermann Paul paul.zimmerm...@loria.fr writes:
this is strange, since from the documentation mpz_jacobi(A,15) should work
but mpz_legendre(A,15) should be undefined. If no check is done at all, I
do not see why there are 3 different functions.
To me, it would make sense to have only
Zimmermann Paul paul.zimmerm...@loria.fr writes:
I'm glad you asked (on the AMD processor):
frite% gcc -I$GMP/include -O2 -g e.c $GMP/lib/libgmp.a
frite% ./a.out
GMP: header 5.0.5, library 5.0.5
mpz_jacobi: 408ms
mpz_legendre: 412ms
mpz_kronecker_ui: 240ms
mpz_ui_kronecker:
