On Fri, 2009-07-24 at 14:51 +0200, Danny Backx wrote:
> On Thu, 2009-07-23 at 15:06 +0200, Danny Backx wrote:
> > On Thu, 2009-07-23 at 11:52 +0100, Dave Korn wrote:
> > > Danny Backx wrote:
> > > > On Thu, 2009-07-23 at 10:07 +0100, Dave Korn wrote:
> > > 
> > > > Kai Ruottu wrote :
> > > >> Comparing the output from some earlier working GCC with the gcc-4.4.0
> > > >> output would reveal if something was wrong in preparing inputs for
> > > >> the soft-float routines... Or maybe something was changed in the
> > > >> soft-float routines... What if you try a 'libgcc.a' taken from some
> > > >> earlier working GCC ?
> > > > 
> > > > Did that, see below. I think this means that the stuff in libgcc.a cause
> > > > the issue.
> 
> It turns out that different functions are used :
> - my 4.4 implementation takes its multiply code from dp-bit.c
> - the 4.1 implementation takes it from ieee754-df.S
> 
> I've now tweaked gcc/config/arm/t-wince-pe (to use _arm_muldivf3 instead
> of _muldivf3 in LIB1ASMFUNCS). Then the gcc build fails (double
> definitions). Worked around that by tweaking dp-bit.c .
> 
> Result :
> Foo 34 12.000000 67
>  12 * 3 -> 36.000000
>  36 -> 0.000000
>  36 d -> 36.000000
> 
> The 12 * 3 line is different from before : it displays the expected
> result now.
> 
> I guess I need to figure out how to make this work with Makefile work,
> not tweaks to dp-bit.c .
> 
> Looking further ...

I need advice on how to proceed with this.

It looks like the change that introduced _arm prefixes for functions in
LIB1ASMFUNCS (in gcc/config/arm/t-wince-pe) broke things.

The other place where this type of stuff is used is in
libgcc/Makefile.in , and I think the line

lib2funcs := $(filter-out $(LIB2FUNCS_EXCLUDE) $(LIB1ASMFUNCS),
$(lib2funcs))

is now broken due to the fact that the "encoding" of lib2funcs and
LIB1ASMFUNCS is different.

Unless I'm still missing something.

Or is there a mechanism I haven't found yet to make sure that dp-bit.c
and the assembler sources (such as ieee754-df.S) don't collide ?

Clues, advice, please ?

        Danny

-- 
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info

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