2015-03-21 Tobias Burnus <burnus@net-b.de>
* gfortran.texi (_gfortran_caf_sync_all,
* _gfortran_caf_sync_images,
_gfortran_caf_sync_memory, _gfortran_caf_error_stop,
_gfortran_caf_error_stop_str, _gfortran_caf_atomic_define,
_gfortran_caf_atomic_ref, _gfortran_caf_atomic_cas,
_gfortran_caf_atomic_op): New sections.
From-SVN: r221550
This commit is contained in:
Tobias Burnus
Tobias Burnus
parent
a684fb6488
commit
2691415b63
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@ -1,3 +1,11 @@
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2015-03-21 Tobias Burnus <burnus@net-b.de>
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* gfortran.texi (_gfortran_caf_sync_all, _gfortran_caf_sync_images,
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_gfortran_caf_sync_memory, _gfortran_caf_error_stop,
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_gfortran_caf_error_stop_str, _gfortran_caf_atomic_define,
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_gfortran_caf_atomic_ref, _gfortran_caf_atomic_cas,
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_gfortran_caf_atomic_op): New sections.
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2015-03-21 Tobias Burnus <burnus@net-b.de>
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* trans-expr.c (gfc_get_tree_for_caf_expr): Reject unimplemented
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@ -3314,6 +3314,15 @@ caf_register_t;
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* _gfortran_caf_sendget:: Sending data between remote images
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* _gfortran_caf_lock:: Locking a lock variable
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* _gfortran_caf_unlock:: Unlocking a lock variable
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* _gfortran_caf_sync_all:: All-image barrier
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* _gfortran_caf_sync_images:: Barrier for selected images
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* _gfortran_caf_sync_memory:: Wait for completion of segment-memory operations
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* _gfortran_caf_error_stop:: Error termination with exit code
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* _gfortran_caf_error_stop_str:: Error termination with string
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* _gfortran_caf_atomic_define:: Atomic variable assignment
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* _gfortran_caf_atomic_ref:: Atomic variable reference
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* _gfortran_caf_atomic_cas:: Atomic compare and swap
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* _gfortran_caf_atomic_op:: Atomic operation
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* _gfortran_caf_co_broadcast:: Sending data to all images
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* _gfortran_caf_co_max:: Collective maximum reduction
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* _gfortran_caf_co_min:: Collective minimum reduction
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@ -3760,6 +3769,270 @@ images for critical-block locking variables.
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@end table
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@node _gfortran_caf_sync_all
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@subsection @code{_gfortran_caf_sync_all} --- All-image barrier
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@cindex Coarray, _gfortran_caf_sync_all
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@table @asis
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@item @emph{Description}:
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Synchronization of all images in the current team; the program only continues
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on a given image after this function has been called on all images of the
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current team. Additionally, it ensures that all pending data transfers of
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previous segment have completed.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_sync_all (int *stat, char *errmsg, int errmsg_len)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{errmsg_len} @tab the buffer size of errmsg.
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@end multitable
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@end table
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@node _gfortran_caf_sync_images
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@subsection @code{_gfortran_caf_sync_images} --- Barrier for selected images
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@cindex Coarray, _gfortran_caf_sync_images
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@table @asis
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@item @emph{Description}:
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Synchronization between the specified images; the program only continues on a
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given image after this function has been called on all images specified for
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that image. Note that one image can wait for all other images in the current
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team (e.g. via @code{sync images(*)}) while those only wait for that specific
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image. Additionally, @code{sync images} it ensures that all pending data
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transfers of previous segment have completed.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_sync_images (int count, int images[], int *stat,
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char *errmsg, int errmsg_len)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{count} @tab the number of images which are provided in the next
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argument. For a zero-sized array, the value is zero. For @code{sync
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images (*)}, the value is @math{-1}.
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@item @var{images} @tab intent(in) an array with the images provided by the
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user. If @var{count} is zero, a NULL pointer is passed.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{errmsg_len} @tab the buffer size of errmsg.
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@end multitable
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@end table
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@node _gfortran_caf_sync_memory
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@subsection @code{_gfortran_caf_sync_memory} --- Wait for completion of segment-memory operations
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@cindex Coarray, _gfortran_caf_sync_memory
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@table @asis
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@item @emph{Description}:
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Acts as optimization barrier between different segments. It also ensures that
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all pending memory operations of this image have been completed.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_sync_memory (int *stat, char *errmsg, int errmsg_len)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{errmsg_len} @tab the buffer size of errmsg.
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@end multitable
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@item @emph{NOTE} A simple implementation could be a simple @code{__asm__
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__volatile__ ("":::"memory)} to prevent code movements.
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@end table
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@node _gfortran_caf_error_stop
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@subsection @code{_gfortran_caf_error_stop} --- Error termination with exit code
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@cindex Coarray, _gfortran_caf_error_stop
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@table @asis
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@item @emph{Description}:
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Invoked for an @code{ERROR STOP} statement which has an integer argument. The
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function should terminate the program with the specified exit code.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_error_stop (int32_t error)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{error} @tab the exit status to be used.
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@end multitable
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@end table
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@node _gfortran_caf_error_stop_str
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@subsection @code{_gfortran_caf_error_stop_str} --- Error termination with string
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@cindex Coarray, _gfortran_caf_error_stop_str
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@table @asis
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@item @emph{Description}:
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Invoked for an @code{ERROR STOP} statement which has a string as argument. The
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function should terminate the program with a nonzero-exit code.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_error_stop (const char *string, int32_t len)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{string} @tab the error message (not zero terminated)
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@item @var{len} @tab the length of the string
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@end multitable
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@end table
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@node _gfortran_caf_atomic_define
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@subsection @code{_gfortran_caf_atomic_define} --- Atomic variable assignment
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@cindex Coarray, _gfortran_caf_atomic_define
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@table @asis
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@item @emph{Description}:
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Assign atomically a value to an integer or logical variable.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_atomic_define (caf_token_t token, size_t offset,
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int image_index, void *value, int *stat, int type, int kind)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{token} @tab intent(in) An opaque pointer identifying the coarray.
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@item @var{offset} @tab By which amount of bytes the actual data is shifted
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compared to the base address of the coarray.
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@item @var{image_index} @tab The ID of the remote image; must be a positive
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number.
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@item @var{value} @tab intent(in) the value to be assigned, passed by reference.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{type} @tab the data type, i.e. @code{BT_INTEGER} (1) or
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@code{BT_LOGICAL} (2).
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@item @var{kind} @tab The kind value (only 4; always @code{int})
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@end multitable
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@end table
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@node _gfortran_caf_atomic_ref
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@subsection @code{_gfortran_caf_atomic_ref} --- Atomic variable reference
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@cindex Coarray, _gfortran_caf_atomic_ref
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@table @asis
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@item @emph{Description}:
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Reference atomically a value of a kind-4 integer or logical variable.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_atomic_ref (caf_token_t token, size_t offset,
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int image_index, void *value, int *stat, int type, int kind)}
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@item @emph{Arguments}:
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{token} @tab intent(in) An opaque pointer identifying the coarray.
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@item @var{offset} @tab By which amount of bytes the actual data is shifted
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compared to the base address of the coarray.
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@item @var{image_index} @tab The ID of the remote image; must be a positive
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number.
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@item @var{value} @tab intent(out) The variable assigned the atomically
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referenced variable.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{type} @tab the data type, i.e. @code{BT_INTEGER} (1) or
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@code{BT_LOGICAL} (2).
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@item @var{kind} @tab The kind value (only 4; always @code{int})
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@end multitable
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@end table
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@node _gfortran_caf_atomic_cas
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@subsection @code{_gfortran_caf_atomic_cas} --- Atomic compare and swap
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@cindex Coarray, _gfortran_caf_atomic_cas
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@table @asis
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@item @emph{Description}:
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Atomic compare and swap of a kind-4 integer or logical variable. Assigns
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atomically the specified value to the atomic variable, if the latter has
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the value specified by the passed condition value.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_atomic_cas (caf_token_t token, size_t offset,
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int image_index, void *old, void *compare, void *new_val, int *stat,
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int type, int kind)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{token} @tab intent(in) An opaque pointer identifying the coarray.
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@item @var{offset} @tab By which amount of bytes the actual data is shifted
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compared to the base address of the coarray.
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@item @var{image_index} @tab The ID of the remote image; must be a positive
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number.
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@item @var{old} @tab intent(out) the value which the atomic variable had
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just before the cas operation.
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@item @var{compare} @tab intent(in) The value used for comparision.
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@item @var{new_val} @tab intent(in) The new value for the atomic variable,
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assigned to the atomic variable, if @code{compare} equals the value of the
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atomic variable.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{type} @tab the data type, i.e. @code{BT_INTEGER} (1) or
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@code{BT_LOGICAL} (2).
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@item @var{kind} @tab The kind value (only 4; always @code{int})
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@end multitable
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@end table
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@node _gfortran_caf_atomic_op
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@subsection @code{_gfortran_caf_atomic_op} --- Atomic operation
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@cindex Coarray, _gfortran_caf_atomic_op
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@table @asis
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@item @emph{Description}:
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Apply an operation atomically to an atomic integer or logical variable.
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After the operation, @var{old} contains the value just before the operation,
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which, respectively, adds (GFC_CAF_ATOMIC_ADD) atomically the @code{value} to
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the atomic integer variable or does a bitwise AND, OR or exclusive OR of the
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between the atomic variable and @var{value}; the result is then stored in the
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atomic variable.
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@item @emph{Syntax}:
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@code{void _gfortran_caf_atomic_op (int op, caf_token_t token, size_t offset,
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int image_index, void *value, void *old, int *stat, int type, int kind)}
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@item @emph{Arguments}:
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@multitable @columnfractions .15 .70
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@item @var{op} @tab the operation to be performed; possible values
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@code{GFC_CAF_ATOMIC_ADD} (1), @code{GFC_CAF_ATOMIC_AND} (2),
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@code{GFC_CAF_ATOMIC_OR} (3), @code{GFC_CAF_ATOMIC_XOR} (4).
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@item @var{token} @tab intent(in) An opaque pointer identifying the coarray.
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@item @var{offset} @tab By which amount of bytes the actual data is shifted
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compared to the base address of the coarray.
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@item @var{image_index} @tab The ID of the remote image; must be a positive
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number.
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@item @var{old} @tab intent(out) the value which the atomic variable had
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just before the atomic operation.
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@item @var{val} @tab intent(in) The new value for the atomic variable,
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assigned to the atomic variable, if @code{compare} equals the value of the
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atomic variable.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{type} @tab the data type, i.e. @code{BT_INTEGER} (1) or
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@code{BT_LOGICAL} (2).
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@item @var{kind} @tab The kind value (only 4; always @code{int})
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@end multitable
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@end table
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@node _gfortran_caf_co_broadcast
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@subsection @code{_gfortran_caf_co_broadcast} --- Sending data to all images
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@ -3780,7 +4053,7 @@ int source_image, int *stat, char *errmsg, int errmsg_len)}
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breoadcasted (on @var{source_image}) or to be received (other images).
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@item @var{source_image} @tab The ID of the image from which the data should
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be taken.
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@item @var{stat} @tab intent(out) Stores the status STAT= and my may be NULL.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{errmsg_len} @tab the buffer size of errmsg.
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@ -3811,7 +4084,7 @@ int *stat, char *errmsg, int a_len, int errmsg_len)}
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breoadcasted (on @var{source_image}) or to be received (other images).
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@item @var{result_image} @tab The ID of the image to which the reduced
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value should be copied to; if zero, it has to be copied to all images.
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@item @var{stat} @tab intent(out) Stores the status STAT= and my may be NULL.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{a_len} @tab The string length of argument @var{a}.
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@ -3847,7 +4120,7 @@ int *stat, char *errmsg, int a_len, int errmsg_len)}
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breoadcasted (on @var{source_image}) or to be received (other images).
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@item @var{result_image} @tab The ID of the image to which the reduced
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value should be copied to; if zero, it has to be copied to all images.
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@item @var{stat} @tab intent(out) Stores the status STAT= and my may be NULL.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{a_len} @tab The string length of argument @var{a}.
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@ -3882,7 +4155,7 @@ int *stat, char *errmsg, int errmsg_len)}
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breoadcasted (on @var{source_image}) or to be received (other images).
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@item @var{result_image} @tab The ID of the image to which the reduced
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value should be copied to; if zero, it has to be copied to all images.
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@item @var{stat} @tab intent(out) Stores the status STAT= and my may be NULL.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{errmsg_len} @tab the buffer size of errmsg.
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@ -3928,7 +4201,7 @@ int *stat, char *errmsg, int a_len, int errmsg_len)}
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breoadcasted (on @var{source_image}) or to be received (other images).
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@item @var{result_image} @tab The ID of the image to which the reduced
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value should be copied to; if zero, it has to be copied to all images.
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@item @var{stat} @tab intent(out) Stores the status STAT= and my may be NULL.
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@item @var{stat} @tab intent(out) Stores the status STAT= and may be NULL.
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@item @var{errmsg} @tab intent(out) When an error occurs, this will be set to
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an error message; may be NULL
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@item @var{a_len} @tab The string length of argument @var{a}.
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