On Wednesday 18 July 2007, Chris Jones wrote: >> -mfpmath=sse : This one tells the compiler to use the SSE capabilities >> of your chip for mathematical stuff. This options can make a different >> to *any* code that uses maths.. Its this that makes the 20% difference >> to my 32 bit cuilds. (you have to also include any one of -msse, -msse2 >> or -msse3 at the same time). > >For more details, try a 'man gcc' and search for the section on -mfpmath. > >Chris Thanks Chris, I'll do that. Humm, tisn't working. For this line in my kernel 'makeit' script: make -j4 -march=athlon -msse -mfpmath=sse bzImage && \ I'm getting this as the first error: make: pmath=sse: No such file or directory make: *** No rule to make target `pmath=sse'. Stop. pebkac? compiler? Taking options back out, it will accept the -msse, but then hangs here: UPD include/linux/compile.h Looks like I failed the class on compiler options 101. Old dog, new tricks.. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) People who are funny and smart and return phone calls get much better press than people who are just funny and smart. -- Howard Simons, "The Washington Post"
