On Mon, May 31, 2010 at 4:56 AM, Oleg Kravchenko <[email protected]> wrote: > What optimal cflags for CPU: > >>asusp535 ~ # cat /proc/cpuinfo >>Processor : XScale-PXA270 rev 7 (v5l) >>BogoMIPS : 519.37 >>Features : swp half thumb fastmult edsp iwmmxt >>CPU implementer : 0x69 >>CPU architecture: 5TE >>CPU variant : 0x0 >>CPU part : 0x411 >>CPU revision : 7 >>Cache type : undefined 5 >>Cache clean : undefined 5 >>Cache lockdown : undefined 5 >>Cache format : Harvard >>I size : 32768 >>I assoc : 32 >>I line length : 32 >>I sets : 32 >>D size : 32768 >>D assoc : 32 >>D line length : 32 >>D sets : 32 >> >>Hardware : Asus P535 >>Revision : 0000 >>Serial : 0000000000000000 > > I am try with this "-pipe -Os -march=armv5te -mtune=iwmmxt -fomit-frame- > pointer" But iwmmxt don't work :( > >>asusp535 ~ # cat iwmmxt.c >>#include <mmintrin.h> >> >>int main(int, char**) >>{ >> _mm_unpackhi_pi16(_mm_setzero_si64(), _mm_setzero_si64()); >> return 0; >>} > > >>asusp535 ~ # gcc test_iwmmxt.c -pipe -Os -march=armv5te -mtune=iwmmxt -fomit- > frame-pointer -o /dev/null >>{standard input}: Assembler messages: >>{standard input}:22: Error: selected processor does not support `wunpckelub > wr6,wr4' > > I am try this "-pipe -Os -march=iwmmxt -mtune=iwmmxt -fomit-frame-pointer" but > i can't get stable software for example gcc can't build them self > > I am watch cflags in uCLibc -march=armv5te -Wa,-mcpu=xscale as result: > >>asusp535 ~ # gcc test_iwmmxt.c -pipe -Os -march=armv5te -Wa,-mcpu=xscale - > fomit-frame-pointer -o /dev/null >>{standard input}: Assembler messages: >>{standard input}:22: Error: selected processor does not support `wunpckelub > wr6,wr4'
this is iwmmxt instruction. It seems your assembler is not including iwmmxt when you select xscale. What version of binutils and gcc are you using. > > I am confused :))) > > P.S. -march=native work only for x86 ;D > _______________________________________________ > uClibc mailing list > [email protected] > http://lists.busybox.net/mailman/listinfo/uclibc > _______________________________________________ uClibc mailing list [email protected] http://lists.busybox.net/mailman/listinfo/uclibc
