On Fri, Jul 15, 2011 at 1:24 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 07/13/2011 04:40 AM, Riadh Elloumi wrote: >> I used all the optimized code for Cortex-A8 like dotprod_ccf_armv7_a.c. >> My compilation flags are: -mcpu=cortex-a8 -mfloat-abi=softfp -mfpu=neon >> -O2. I used fftw-3.2.2. > > What does -mfloat-abi=softfp do? Does that cause software floating-point to > be used? > If it does, then your floating-point performance is going to be completely > awful.
No, it's one way of specifying hardware instructions. http://gcc.gnu.org/onlinedocs/gcc-4.4.6/gcc/ARM-Options.html "`softfp' allows the generation of code using hardware floating-point instructions, but still uses the soft-float calling conventions." "Use -mfloat-abi=softfp with the appropriate -mfpu option to allow the compiler to generate code that makes use of the hardware floating-point capabilities for these CPUs." Thomas _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
