On Sun, Feb 21, 2010 at 1:07 PM, Erik Trulsson <ertr1...@student.uu.se> wrote: > On Sun, Feb 21, 2010 at 12:27:34PM -0800, H.J. Lu wrote: >> On Sun, Feb 21, 2010 at 12:22 PM, Erik Trulsson <ertr1...@student.uu.se> >> wrote: >> >> >> >> I agreed that gcc for x86 should choose a sensible default for 95% of >> >> current x86 processors in use. People with those old processors can >> >> use older gcc or -march=. >> >> >> >> Default to SSE2 is a good first step. >> > >> > I think you vastly underestimate the number of older x86 processors in >> > use. >> > >> >> There is nothing which stops them from using -march=i386. It just may not >> be the default. > > That argument cuts both ways you know. There is nothing stopping > people with the latest CPUs from using -march= to get code optimised > for their hardware. It just may not be the default.
That is where majority comes in. -- H.J.
