On 2/8/10, Bill Gatliff <[email protected]> wrote: > OT, but has anyone looked at what gains can be had by rebuilding > packages with, say, A8 or other optimizations for processors that > support them? Well, it has a VFP FPU, so floating point apps will run N times faster, and GCC optimizes some kinds of integer loops into SIMD instructions for the NEON, beside the different instruction timing info and pipeline description for better instruction scheduling.
The easiest way to try this is to make fake versions of gcc and put them at the start of the PATH: mkdir ~/cortex cat > ~/cortex/gcc << EOF #! /bin/sh exec gcc-4.3-crunch -mcpu=cortex-a8 -mfpu=vfp -mfloat-abi=softfp "$@" EOF chmod 755 ~/cortex/gcc ln -s gcc ~/cortex/cc ln -s gcc ~/cortex/gcc-4.3 ln -s gcc ~/cortex/arm-linux-gnueabi-gcc and fool the build system into using them PATH=~/cortex:$PATH dpkg-buildpackage -rfakeroot -B I'd be interested to know what difference it makes to non-FP applications M -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
