SF soft-fp for i386

[Kai Ruottu]

30.4.2015, 12:12, Ilya Enkovich kirjoitti:
> Hi,
>
> trying to compile a simple soft-fp test on i386 I get multiple link errors:
>
>> cat test.c
> int main ()
> {
>    float a,b;
>    return (int)a*b;
> }
>> gcc -msoft-float test.c -m32
> /tmp/cc1Zh1Jy.o: In function `main':
> test.c:(.text+0x11): undefined reference to `__fixsfsi'
> test.c:(.text+0x19): undefined reference to `__floatsisf'
> test.c:(.text+0x29): undefined reference to `__mulsf3'
> test.c:(.text+0x31): undefined reference to `__fixsfsi'
> collect2: error: ld returned 1 exit status
>
> Is there a way to configure libgcc to have implementations for SF
> soft-fp functions or it is not supported for i386?

The soft-fp functions are generally available for all CPUs via the 
'config/fp-bit.c'.
So just spy the other CPU targets about how to enable a "-msoft" or 
something
extra multilib for i386. Last when I did this, using 
'-mno-fp-ret-in-i387' or what it
was, was required (to be used) with '-msoft-float'.