using ARM VFP hardware

[Ian Lance Taylor]

Ineiev <ineiev@gmail.com> 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