Hi, Please forgive this post but I've tried the archives & google and am unable to find much info on gcc & ARM's VFP instruction set. I have a few questions: 1) How is the VFP coprocessor utilised by GCC when compiling with -mfpu=vfp -mfloat-abi=softfp? Will GCC emit vfp instructions for doing regular (scalor) floating point operations? I.e. will "float a =3.14; a *= 20.0;" be done by the coprocessor? 2) How should I use the VFP instructions in my own code? I beleive there are GCC macros for using SSE instructions, is there anything similar for ARM VFP? (A quick traul through my GCC sources say no, but I may have missed something.) If not, can I use inline assembly instead and are the mnemonics and syntax the same as described in the ARM Architecture Reference Manual? 3) Does the GCC -ftree-vectorize work with VFP? 4) Is there a better place to look for this information? :-) Cheers, Tom
