Date: Mon, 4 Dec 2006 09:44:48 -0500 From: Erik Winkler <ewinkler@...ls.com> To: john-users@...ts.openwall.com Subject: Re: build options for macosx-ppc32-altivec On Dec 3, 2006, at 10:15 PM, Olivier Meyer wrote: > With this patch to the Makefile, I can get much higher performance. > Will anyone add cpu detection to set the -mcpu arg. It can be done > with /usr/bin/machine on osx. > 496,497c496,497 > < OPT_NORMAL="-fast -mcpu=7400 -faltivec -O6" \ > < OPT_INLINE="-fast -mcpu=7400 -faltivec -O6 -finline- > limit=4000" > --- >> OPT_NORMAL="-fast -mcpu=7450" \ >> OPT_INLINE="-fast -mcpu=7450 -finline-limit=4000" Actually, gcc-3.3 generates faster code on the powerpc than gcc-4.0. With Apple's move to Intel processors, don't expect future versions of gcc to improve on powerpc code generation. I use the following for my powerbook G4 and found it generates code that is 10-15% faster than the same code generated with gcc-4.0.1. CPP=gcc-3.3 CC=gcc-3.3 AS=gcc-3.3 LD=gcc-3.3 \ ----- OPT_NORMAL="-O3 -mcpu=7400 -mtune=7400 -fstrict-aliasing -funroll- loops -ffast-math -mdynamic-no-pic" \ OPT_INLINE="-O3 -mcpu=7400 -mtune=7400 -fstrict-aliasing -funroll- loops -ffast-math -mdynamic-no-pic -finline-limit=4000" Erik > > -- > ----------------------- > Olivier V. Meyer > Congress shall make no law respecting an establishment of religion, or > prohibiting the free exercise thereof; or abridging the freedom of > speech, or of the press; or the right of the people peaceably to > assemble, and to petition the government for a redress of grievances. > > -- > To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com > and reply > to the automated confirmation request that will be sent to you. -- To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply to the automated confirmation request that will be sent to you.
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