Re: RFC patch: Add libquadmath - and use it in gfortran (round two)

[Jack Howarth <howarth at bromo dot med dot uc dot edu>]

On Mon, Nov 08, 2010 at 09:33:21PM +0100, Tobias Burnus wrote:
> Hi all,
>
> that's an updated version of my patch at  
> http://gcc.gnu.org/ml/gcc-patches/2010-11/msg00653.html
> which is in turn based on FX's patch at  
> http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02388.html
>
> The patch contains:
>
> a) libquadmath(.tar.bz2): __float128 math library. It exports all math  
> functions with the suffix "q" ("tanq", "jnq" etc.); it also exports two  
> I/O related functions with the prefix quadmath_. The library is used  
> from libgfortran but can also be used from C/C++. However, there is no  
> printf hook thus doing I/O from C/C++ is a bit more effort. The library  
> is automatically build if language=fortran is enabled, but on systems  
> without __float128 it is a no op.
>
> b) quad.diff: The changes to the toplevel Makefile.def/configure.ac to  
> build libquad with language=fortran; changes to gcc/fortran to use  
> __float128; changes to libgfortran to use libquadmath.
> Libgfortran automatically links libquadmath if it is available; if  
> -static-libgfortran is used, the (dynamically linked) libquadmath is  
> surounded by --as-needed/--no-as-needed.
>
> c) quad_gen.diff: Due to popular request, the generated files.
>
> Changes to previous patch:
>
> - Fixed several issues regarding configure. I hope that it now builds on  
> Darwin and creates a DLL under Cygwin/MinGW(.org/64)*
> - It does no longer use weakrefs for the math functions
> - It uses a weakref for I/O (write_float etc.), but
> - There is now a transfer_{complex,real}{,write}128 function, whose only  
> purpose is to drag in the libquadmath I/O function.
> Comments?
>

Tobias,
    Where is __gfortran_transfer_real_write128 supposed to reside? I see...

[MacPro:~/gcc-4.6-20101108/libgfortran] howarth% grep gfortran_transfer_real_write128 *
gfortran.map:    _gfortran_transfer_real_write128;

but there doesn't seem to be any actual code generated for that subroutine.
           Jack

> Tobias
>
> $ diffstat quad.diff
>   b/Makefile.def                             |    3 +
>   b/configure.ac                             |    1
>   b/gcc/fortran/gfortranspec.c               |   38 +++++++++++++++++++
>   b/gcc/fortran/trans-io.c                   |   49  
> +++++++++++++++++++++++--
>   b/gcc/fortran/trans-types.c                |    8 +++-
>   b/libgfortran/Makefile.am                  |    6 ++-
>   b/libgfortran/acinclude.m4                 |   51  
> ++++++++++++++++++++++++++
>   b/libgfortran/configure.ac                 |   13 +++++-
>   b/libgfortran/gfortran.map                 |    5 ++
>   b/libgfortran/intrinsics/cshift0.c         |   28 +++++++++++---
>   b/libgfortran/intrinsics/erfc_scaled_inc.c |   11 +++++
>   b/libgfortran/intrinsics/pack_generic.c    |   28 +++++++++++---
>   b/libgfortran/intrinsics/spread_generic.c  |   56  
> ++++++++++++++++++++++-------
>   b/libgfortran/intrinsics/unpack_generic.c  |   56  
> ++++++++++++++++++++++-------
>   b/libgfortran/io/read.c                    |    8 +++-
>   b/libgfortran/io/transfer.c                |   56  
> ++++++++++++++++++++++++++++-
>   b/libgfortran/io/write.c                   |    1
>   b/libgfortran/io/write_float.def           |   11 +++++
>   b/libgfortran/libgfortran.h                |   18 ++++++++-
>   b/libgfortran/m4/mtype.m4                  |    2 -
>   b/libgfortran/mk-kinds-h.sh                |   39 +++++++++++++-------
>   b/libgfortran/runtime/in_pack_generic.c    |   29 +++++++++++----
>   b/libgfortran/runtime/in_unpack_generic.c  |   31 ++++++++++++----
>   gcc/libgfortran/kinds-override.h           |   46 +++++++++++++++++++++++
>   gcc/libgfortran/libgfortran.spec.in        |    8 ++++
>   25 files changed, 524 insertions(+), 78 deletions(-)
>
> $ diffstat quad-gen.diff
>   b/Makefile.in                          |  467 +
>   b/configure                            |    1
>   b/libgfortran/Makefile.in              |   74
>   b/libgfortran/config.h.in              |    3
>   b/libgfortran/configure                |  139
>   gcc/libgfortran/generated/pow_r16_i4.c |   75
>   gcc/libquadmath/Makefile.in            | 1219 +++
>   gcc/libquadmath/aclocal.m4             |  979 ++
>   gcc/libquadmath/config.h.in            |   68
>   gcc/libquadmath/configure              |13288  
> +++++++++++++++++++++++++++++++++
>   10 files changed, 16289 insertions(+), 24 deletions(-)
>