Re: [PATCH] Implement __abs?f2 functions in soft-fp

[Roger Sayle <roger at eyesopen dot com>]

> But GCC people and not libc people are the ones who decide what
> the libgcc interface is that gcc -ffree-standing emits code for.

It looks like "software floating point" is a special exception.

When compiling on a processor without an FPU, such as H8300, or
even x86 with "-msoft-float -mno-ret-in-387", GCC emits code that
contains calls to a suitable software floating point library.
These generic routines are not part of libgcc, and on most platforms
aren't part of glibc by default.  From my searches of the internet,
it looks like the main library that implements these routines
appears to be the "soft-fp" directory of glibc.  Given that this
is the principal implementation of this API, I don't think GCC
should emit calls to functions that it doesn't support.

I must admit that I was a bit surprised that soft-fp wasn't part
of libgcc, nor GCC, nor binutils, nor newlib, nor src.  But if
glibc is its home, this is where I should send the patches...

Roger
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