253444c6d0
1. New mpifort wrapper compiler: you can utilize mpif.h, use mpi, and use mpi_f08 through this one wrapper compiler
1. mpif77 and mpif90 still exist, but are sym links to mpifort and may be removed in a future release
1. The mpi module has been re-implemented and is significantly "mo' bettah"
1. The mpi_f08 module offers many, many improvements over mpif.h and the mpi module
This stuff is coming from a VERY long-lived mercurial branch (3 years!); it'll almost certainly take a few SVN commits and a bunch of testing before I get it correctly committed to the SVN trunk.
== More details ==
Craig Rasmussen and I have been working with the MPI-3 Fortran WG and Fortran J3 committees for a long, long time to make a prototype MPI-3 Fortran bindings implementation. We think we're at a stable enough state to bring this stuff back to the trunk, with the goal of including it in OMPI v1.7.
Special thanks go out to everyone who has been incredibly patient and helpful to us in this journey:
* Rolf Rabenseifner/HLRS (mastermind/genius behind the entire MPI-3 Fortran effort)
* The Fortran J3 committee
* Tobias Burnus/gfortran
* Tony !Goetz/Absoft
* Terry !Donte/Oracle
* ...and probably others whom I'm forgetting :-(
There's still opportunities for optimization in the mpi_f08 implementation, but by and large, it is as far along as it can be until Fortran compilers start implementing the new F08 dimension(..) syntax.
Note that gfortran is currently unsupported for the mpi_f08 module and the new mpi module. gfortran users will a) fall back to the same mpi module implementation that is in OMPI v1.5.x, and b) not get the new mpi_f08 module. The gfortran maintainers are actively working hard to add the necessary features to support both the new mpi_f08 module and the new mpi module implementations. This will take some time.
As mentioned above, ompi/mpi/f77 and ompi/mpi/f90 no longer exist. All the fortran bindings implementations have been collated under ompi/mpi/fortran; each implementation has its own subdirectory:
{{{
ompi/mpi/fortran/
base/ - glue code
mpif-h/ - what used to be ompi/mpi/f77
use-mpi-tkr/ - what used to be ompi/mpi/f90
use-mpi-ignore-tkr/ - new mpi module implementation
use-mpi-f08/ - new mpi_f08 module implementation
}}}
There's also a prototype 6-function-MPI implementation under use-mpi-f08-desc that emulates the new F08 dimension(..) syntax that isn't fully available in Fortran compilers yet. We did that to prove it to ourselves that it could be done once the compilers fully support it. This directory/implementation will likely eventually replace the use-mpi-f08 version.
Other things that were done:
* ompi_info grew a few new output fields to describe what level of Fortran support is included
* Existing Fortran examples in examples/ were renamed; new mpi_f08 examples were added
* The old Fortran MPI libraries were renamed:
* libmpi_f77 -> libmpi_mpifh
* libmpi_f90 -> libmpi_usempi
* The configury for Fortran was consolidated and significantly slimmed down. Note that the F77 env variable is now IGNORED for configure; you should only use FC. Example:
{{{
shell$ ./configure CC=icc CXX=icpc FC=ifort ...
}}}
All of this work was done in a Mercurial branch off the SVN trunk, and hosted at Bitbucket. This branch has got to be one of OMPI's longest-running branches. Its first commit was Tue Apr 07 23:01:46 2009 -0400 -- it's over 3 years old! :-) We think we've pulled in all relevant changes from the OMPI trunk (e.g., Fortran implementations of the new MPI-3 MPROBE stuff for mpif.h, use mpi, and use mpi_f08, and the recent Fujitsu Fortran patches).
I anticipate some instability when we bring this stuff into the trunk, simply because it touches a LOT of code in the MPI layer in the OMPI code base. We'll try our best to make it as pain-free as possible, but please bear with us when it is committed.
This commit was SVN r26283.
224 строки
9.7 KiB
C
224 строки
9.7 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2006-2012 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef OMPI_FORTRAN_BASE_CONSTANTS_H
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#define OMPI_FORTRAN_BASE_CONSTANTS_H
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#include "ompi_config.h"
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/*
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* Several variables are used to link against MPI F77 constants which
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* correspond to addresses, e.g. MPI_BOTTOM, and are implemented via
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* common blocks.
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*
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* We use common blocks so that in the C wrapper functions, we can
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* compare the address that comes in against known addresses (e.g., if
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* the "status" argument in MPI_RECV is the address of the common
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* block for the fortran equivalent of MPI_STATUS_IGNORE, then we know
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* to pass the C MPI_STATUS_IGNORE to the C MPI_Recv function). As
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* such, we never look at the *value* of these variables (indeed,
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* they're never actually initialized), but instead only ever look at
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* the *address* of these variables.
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*
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* As such, it is not strictly necessary that the size and type of our
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* C variables matches that of the common Fortran block variables.
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* However, good programming form says that we should match, so we do.
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*
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* Note, however, that the alignments of the Fortran common block and
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* the C variable may not match (e.g., Intel 9.0 compilers on 64 bit
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* platforms will put the alignment of a double on 4 bytes, but put
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* the alignment of all common blocks on 16 bytes). This only matters
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* (to some compilers!), however, if you initialize the C variable in
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* the global scope. If the C global instantiation is not
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* initialized, the compiler/linker seems to "figure it all out" and
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* make the alignments match.
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*
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* Since we made the fundamental decision to support all 4 common
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* fortran compiler symbol conventions within the same library for
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* those compilers who support weak symbols, we need to have 4 symbols
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* for each of the fortran address constants. As described above, we
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* have to have known *pointer* values for the fortran addresses
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* (e.g., MPI_STATUS_IGNORE). So when the fortran wrapper for
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* MPI_RECV gets (MPI_Fint *status), it can check (status ==
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* some_sentinel_value) to know that it got the Fortran equivalent of
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* MPI_STATUS_IGNORE and therefore pass the C MPI_STATUS_IGNORE to the
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* C MPI_Recv.
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*
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* We do this by having a "common" block in mpif.h:
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*
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* INTEGER MPI_STATUS_IGNORE(MPI_STATUS_SIZE)
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* common /mpi_fortran_status_ignore/ MPI_STATUS_IGNORE
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*
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* This makes the fortran variable MPI_STATUS_IGNORE effectively be an
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* alias for the C variable "mpi_fortran_status_ignore" -- but the C
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* symbol name is according to the fortran compiler's naming symbol
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* convention bais. So it could be MPI_FORTRAN_STATUS_IGNORE,
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* mpi_fortran_status_ignore, mpi_fortran_status_ignore_, or
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* mpi_fortran_status_ignore__.
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*
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* Hence, we have to have *4* C symbols for this, and them compare for
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* all of them in the fortran MPI_RECV wrapper. :-( I can't think of
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* any better way to do this.
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*
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* I'm putting these 4 comparisons in macros (on systems where we
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* don't support the 4 symbols -- e.g., OSX, where we don't have weak
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* symbols -- it'll only be one comparison), so if anyone things of
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* something better than this, you should only need to modify this
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* file.
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*/
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#define DECL(type, upper_case, lower_case, single_u, double_u) \
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OMPI_DECLSPEC extern type upper_case; \
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OMPI_DECLSPEC extern type lower_case; \
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OMPI_DECLSPEC extern type single_u; \
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OMPI_DECLSPEC extern type double_u
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/* Note that the rationale for the types of each of these variables is
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discussed in ompi/include/mpif-common.h. Do not change the types
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without also changing ompi/runtime/ompi_mpi_init.c and
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ompi/include/mpif-common.h. */
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DECL(int, MPI_FORTRAN_BOTTOM, mpi_fortran_bottom,
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mpi_fortran_bottom_, mpi_fortran_bottom__);
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DECL(int, MPI_FORTRAN_IN_PLACE, mpi_fortran_in_place,
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mpi_fortran_in_place_, mpi_fortran_in_place__);
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DECL(char *, MPI_FORTRAN_ARGV_NULL, mpi_fortran_argv_null,
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mpi_fortran_argv_null_, mpi_fortran_argv_null__);
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DECL(double, MPI_FORTRAN_ARGVS_NULL, mpi_fortran_argvs_null,
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mpi_fortran_argvs_null_, mpi_fortran_argvs_null__);
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DECL(int *, MPI_FORTRAN_ERRCODES_IGNORE, mpi_fortran_errcodes_ignore,
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mpi_fortran_errcodes_ignore_, mpi_fortran_errcodes_ignore__);
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DECL(int *, MPI_FORTRAN_STATUS_IGNORE, mpi_fortran_status_ignore,
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mpi_fortran_status_ignore_, mpi_fortran_status_ignore__);
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DECL(double, MPI_FORTRAN_STATUSES_IGNORE, mpi_fortran_statuses_ignore,
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mpi_fortran_statuses_ignore_, mpi_fortran_statuses_ignore__);
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/*
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* Create macros to do the checking. Only check for all 4 if we have
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* weak symbols. Otherwise, just check for the one relevant symbol.
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*/
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#if OPAL_HAVE_WEAK_SYMBOLS
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#define OMPI_IS_FORTRAN_BOTTOM(addr) \
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(addr == (void*) &MPI_FORTRAN_BOTTOM || \
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addr == (void*) &mpi_fortran_bottom || \
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addr == (void*) &mpi_fortran_bottom_ || \
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addr == (void*) &mpi_fortran_bottom__)
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#define OMPI_IS_FORTRAN_IN_PLACE(addr) \
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(addr == (void*) &MPI_FORTRAN_IN_PLACE || \
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addr == (void*) &mpi_fortran_in_place || \
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addr == (void*) &mpi_fortran_in_place_ || \
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addr == (void*) &mpi_fortran_in_place__)
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#define OMPI_IS_FORTRAN_ARGV_NULL(addr) \
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(addr == (void*) &MPI_FORTRAN_ARGV_NULL || \
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addr == (void*) &mpi_fortran_argv_null || \
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addr == (void*) &mpi_fortran_argv_null_ || \
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addr == (void*) &mpi_fortran_argv_null__)
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#define OMPI_IS_FORTRAN_ARGVS_NULL(addr) \
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(addr == (void*) &MPI_FORTRAN_ARGVS_NULL || \
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addr == (void*) &mpi_fortran_argvs_null || \
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addr == (void*) &mpi_fortran_argvs_null_ || \
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addr == (void*) &mpi_fortran_argvs_null__)
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#define OMPI_IS_FORTRAN_ERRCODES_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_ERRCODES_IGNORE || \
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addr == (void*) &mpi_fortran_errcodes_ignore || \
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addr == (void*) &mpi_fortran_errcodes_ignore_ || \
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addr == (void*) &mpi_fortran_errcodes_ignore__)
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#define OMPI_IS_FORTRAN_STATUS_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_STATUS_IGNORE || \
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addr == (void*) &mpi_fortran_status_ignore || \
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addr == (void*) &mpi_fortran_status_ignore_ || \
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addr == (void*) &mpi_fortran_status_ignore__)
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#define OMPI_IS_FORTRAN_STATUSES_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_STATUSES_IGNORE || \
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addr == (void*) &mpi_fortran_statuses_ignore || \
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addr == (void*) &mpi_fortran_statuses_ignore_ || \
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addr == (void*) &mpi_fortran_statuses_ignore__)
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#elif OMPI_FORTRAN_CAPS
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#define OMPI_IS_FORTRAN_BOTTOM(addr) \
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(addr == (void*) &MPI_FORTRAN_BOTTOM)
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#define OMPI_IS_FORTRAN_IN_PLACE(addr) \
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(addr == (void*) &MPI_FORTRAN_IN_PLACE)
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#define OMPI_IS_FORTRAN_ARGV_NULL(addr) \
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(addr == (void*) &MPI_FORTRAN_ARGV_NULL)
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#define OMPI_IS_FORTRAN_ARGVS_NULL(addr) \
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(addr == (void*) &MPI_FORTRAN_ARGVS_NULL)
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#define OMPI_IS_FORTRAN_ERRCODES_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_ERRCODES_IGNORE)
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#define OMPI_IS_FORTRAN_STATUS_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_STATUS_IGNORE)
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#define OMPI_IS_FORTRAN_STATUSES_IGNORE(addr) \
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(addr == (void*) &MPI_FORTRAN_STATUSES_IGNORE)
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#elif OMPI_FORTRAN_PLAIN
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#define OMPI_IS_FORTRAN_BOTTOM(addr) \
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(addr == (void*) &mpi_fortran_bottom)
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#define OMPI_IS_FORTRAN_IN_PLACE(addr) \
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(addr == (void*) &mpi_fortran_in_place)
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#define OMPI_IS_FORTRAN_ARGV_NULL(addr) \
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(addr == (void*) &mpi_fortran_argv_null)
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#define OMPI_IS_FORTRAN_ARGVS_NULL(addr) \
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(addr == (void*) &mpi_fortran_argvs_null)
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#define OMPI_IS_FORTRAN_ERRCODES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_errcodes_ignore)
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#define OMPI_IS_FORTRAN_STATUS_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_status_ignore)
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#define OMPI_IS_FORTRAN_STATUSES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_statuses_ignore)
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#elif OMPI_FORTRAN_SINGLE_UNDERSCORE
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#define OMPI_IS_FORTRAN_BOTTOM(addr) \
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(addr == (void*) &mpi_fortran_bottom_)
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#define OMPI_IS_FORTRAN_IN_PLACE(addr) \
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(addr == (void*) &mpi_fortran_in_place_)
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#define OMPI_IS_FORTRAN_ARGV_NULL(addr) \
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(addr == (void*) &mpi_fortran_argv_null_)
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#define OMPI_IS_FORTRAN_ARGVS_NULL(addr) \
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(addr == (void*) &mpi_fortran_argvs_null_)
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#define OMPI_IS_FORTRAN_ERRCODES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_errcodes_ignore_)
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#define OMPI_IS_FORTRAN_STATUS_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_status_ignore_)
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#define OMPI_IS_FORTRAN_STATUSES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_statuses_ignore_)
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#else
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#define OMPI_IS_FORTRAN_BOTTOM(addr) \
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(addr == (void*) &mpi_fortran_bottom__)
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#define OMPI_IS_FORTRAN_IN_PLACE(addr) \
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(addr == (void*) &mpi_fortran_in_place__)
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#define OMPI_IS_FORTRAN_ARGV_NULL(addr) \
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(addr == (void*) &mpi_fortran_argv_null__)
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#define OMPI_IS_FORTRAN_ARGVS_NULL(addr) \
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(addr == (void*) &mpi_fortran_argvs_null__)
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#define OMPI_IS_FORTRAN_ERRCODES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_errcodes_ignore__)
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#define OMPI_IS_FORTRAN_STATUS_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_status_ignore__)
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#define OMPI_IS_FORTRAN_STATUSES_IGNORE(addr) \
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(addr == (void*) &mpi_fortran_statuses_ignore__)
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#endif /* weak / specific symbol type */
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/* Convert between Fortran and C MPI_BOTTOM */
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#define OMPI_F2C_BOTTOM(addr) (OMPI_IS_FORTRAN_BOTTOM(addr) ? MPI_BOTTOM : (addr))
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#define OMPI_F2C_IN_PLACE(addr) (OMPI_IS_FORTRAN_IN_PLACE(addr) ? MPI_IN_PLACE : (addr))
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#endif /* OMPI_FORTRAN_BASE_CONSTANTS_H */
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