On Mon, 2009-11-09 at 09:31 -0800, Ian Lance Taylor wrote: > Ineiev <ineiev@xxxxxxxxx> writes: > > > After that I compile a test: > > int > > main(int argc,char**argv) > > {double x=argc*.17,y=argc*2-.1; > > return(int)(x/y+y*x); > > } > > > > arm-unknown-elf-gcc -Wall -O0 -nostdlib \ > > -mfpu=vfp -mfloat-abi=soft -o e e.c -lgcc > > > > Then I look for instructions whose name begins with f > > Using -mfloat=abi=soft directs gcc to call floating point emulation > routines. Have you tried -mfloat-abi=softfp or -mfloat-abi=hard? > > > ../gcc-4.4.1/configure --prefix=$HOME/arm \ > > --target=arm-unknown-elf --enable-interwork \ > > --disable-nls --with-mpfr=$HOME/mpfr \ > > --disable-libssp --enable-languages=c \ > > --with-fpu=vfp --with-cpu=arm946e-s --with-float=soft \ > > Using --with-float=soft makes soft floating point the default. If you > don't want soft floating point, what led you to use --with-float=soft? > > Ian -mfloat-abi=hard will only work with gcc-4.5 (ie trunk) R.