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Old 2011-04-01, 12:40   #3
unconnected
 
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May 2009
Russia, Moscow

51348 Posts
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Quote:
Originally Posted by Syd View Post
For large numbers > ~ 400 digits linking against gwnum gave a huge speedup.
I think it is only for 2^n-1 and 2^n+1 numbers.

I decided to recomplile binaries from scratch and there are some questions again.
Why ecm-params.h.athlon64 is used instead of ecm-params.h.core2 ?
Why SSE2 instructions were not used in NTT code?

Code:
config.status: linking ecm-params.h.athlon64 to ecm-params.h
config.status: linking mul_fft-params.h.athlon64 to mul_fft-params.h
config.status: executing depfiles commands
config.status: executing libtool commands
configure: Configuration:
configure: Build for host type x86_64-unknown-linux-gnu
configure: CC=gcc -std=gnu99, CFLAGS=-W -Wall -Wundef -O2 -pedantic -m64 -mtune=core2 -march=core2
configure: Linking GMP with /usr/local//lib/libgmp.a
configure: Using asm redc code from directory x86_64
configure: Not using SSE2 instructions in NTT code
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