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C $Header: /u/gcmpack/MITgcm/eesupp/inc/CPP_EEMACROS.h,v 1.23 2010/08/12 21:38:58 jmc Exp $ |
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C $Name: $ |
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CBOP |
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C !ROUTINE: CPP_EEMACROS.h |
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C !INTERFACE: |
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C include "CPP_EEMACROS.h " |
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C !DESCRIPTION: |
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C *==========================================================* |
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C | CPP_EEMACROS.h |
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C *==========================================================* |
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C | C preprocessor "execution environment" supporting |
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C | macros. Use this file to define macros for simplifying |
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C | execution environment in which a model runs - as opposed |
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C | to the dynamical problem the model solves. |
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C *==========================================================* |
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CEOP |
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#ifndef _CPP_EEMACROS_H_ |
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#define _CPP_EEMACROS_H_ |
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C In general the following convention applies: |
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C ALLOW - indicates an feature will be included but it may |
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C CAN have a run-time flag to allow it to be switched |
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C on and off. |
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C If ALLOW or CAN directives are "undef'd" this generally |
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C means that the feature will not be available i.e. it |
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C will not be included in the compiled code and so no |
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C run-time option to use the feature will be available. |
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C |
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C ALWAYS - indicates the choice will be fixed at compile time |
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C so no run-time option will be present |
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|
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C Flag used to indicate which flavour of multi-threading |
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C compiler directives to use. Only set one of these. |
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C USE_SOLARIS_THREADING - Takes directives for SUN Workshop |
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C compiler. |
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C USE_KAP_THREADING - Takes directives for Kuck and |
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C Associates multi-threading compiler |
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C ( used on Digital platforms ). |
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C USE_IRIX_THREADING - Takes directives for SGI MIPS |
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C Pro Fortran compiler. |
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C USE_EXEMPLAR_THREADING - Takes directives for HP SPP series |
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C compiler. |
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C USE_C90_THREADING - Takes directives for CRAY/SGI C90 |
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C system F90 compiler. |
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#ifdef TARGET_SUN |
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#define USE_SOLARIS_THREADING |
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#define USING_THREADS |
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#endif |
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|
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#ifdef TARGET_DEC |
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#define USE_KAP_THREADING |
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#define USING_THREADS |
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#endif |
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|
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#ifdef TARGET_SGI |
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#define USE_IRIX_THREADING |
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#define USING_THREADS |
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#endif |
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|
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#ifdef TARGET_HP |
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#define USE_EXEMPLAR_THREADING |
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#define USING_THREADS |
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#endif |
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|
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#ifdef TARGET_CRAY_VECTOR |
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#define USE_C90_THREADING |
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#define USING_THREADS |
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#endif |
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|
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#ifdef USE_OMP_THREADING |
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#define USING_THREADS |
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#endif |
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|
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C-- Define the mapping for the _BARRIER macro |
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C On some systems low-level hardware support can be accessed through |
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C compiler directives here. |
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#define _BARRIER CALL BARRIER(myThid) |
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|
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C-- Define the mapping for the BEGIN_CRIT() and END_CRIT() macros. |
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C On some systems we simply execute this section only using the |
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C master thread i.e. its not really a critical section. We can |
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C do this because we do not use critical sections in any critical |
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C sections of our code! |
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#define _BEGIN_CRIT(a) _BEGIN_MASTER(a) |
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#define _END_CRIT(a) _END_MASTER(a) |
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|
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C-- Define the mapping for the BEGIN_MASTER_SECTION() and |
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C END_MASTER_SECTION() macros. These are generally implemented by |
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C simply choosing a particular thread to be "the master" and have |
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C it alone execute the BEGIN_MASTER..., END_MASTER.. sections. |
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|
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#define _BEGIN_MASTER(a) IF ( a .EQ. 1 ) THEN |
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#define _END_MASTER(a) ENDIF |
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CcnhDebugStarts |
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C Alternate form to the above macros that increments (decrements) a counter each |
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C time a MASTER section is entered (exited). This counter can then be checked in barrier |
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C to try and detect calls to BARRIER within single threaded sections. |
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C Using these macros requires two changes to Makefile - these changes are written |
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C below. |
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C 1 - add a filter to the CPP command to kill off commented _MASTER lines |
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C 2 - add a filter to the CPP output the converts the string N EWLINE to an actual newline. |
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C The N EWLINE needs to be changes to have no space when this macro and Makefile changes |
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C are used. Its in here with a space to stop it getting parsed by the CPP stage in these |
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C comments. |
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C #define _BEGIN_MASTER(a) IF ( a .EQ. 1 ) THEN N EWLINE CALL BARRIER_MS(a) |
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C #define _END_MASTER(a) CALL BARRIER_MU(a) N EWLINE ENDIF |
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C 'CPP = cat $< | $(TOOLSDIR)/set64bitConst.sh | grep -v '^[cC].*_MASTER' | cpp -traditional -P' |
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C .F.f: |
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C $(CPP) $(DEFINES) $(INCLUDES) | sed 's/N EWLINE/\n/' > $@ |
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CcnhDebugEnds |
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|
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C-- Control storage of floating point operands |
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C On many systems it improves performance only to use |
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C 8-byte precision for time stepped variables. |
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C Constant in time terms ( geometric factors etc.. ) |
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C can use 4-byte precision, reducing memory utilisation and |
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C boosting performance because of a smaller working |
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C set size. However, on vector CRAY systems this degrades |
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C performance. |
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C- Note: global_sum/max macros were used to switch to JAM routines (obsolete); |
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C in addition, since only the R4 & R8 S/R are coded, GLOBAL RS & RL macros |
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C enable to call the corresponding R4 or R8 S/R. |
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#ifdef REAL4_IS_SLOW |
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#define _RS Real*8 |
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#define RS_IS_REAL8 |
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#define _GLOBAL_SUM_RS(a,b) CALL GLOBAL_SUM_R8 ( a, b) |
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#define _GLOBAL_MAX_RS(a,b) CALL GLOBAL_MAX_R8 ( a, b ) |
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#define _MPI_TYPE_RS MPI_DOUBLE_PRECISION |
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#ifdef USE_OLD_MACROS_R4R8toRSRL |
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#define _GLOBAL_SUM_R4(a,b) CALL GLOBAL_SUM_R8 ( a, b ) |
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#define _GLOBAL_MAX_R4(a,b) CALL GLOBAL_MAX_R8 ( a, b ) |
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#endif |
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#else |
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#define _RS Real*4 |
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#define RS_IS_REAL4 |
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#define _GLOBAL_SUM_RS(a,b) CALL GLOBAL_SUM_R4 ( a, b ) |
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#define _GLOBAL_MAX_RS(a,b) CALL GLOBAL_MAX_R4 ( a, b ) |
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#define _MPI_TYPE_RS MPI_REAL |
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#ifdef USE_OLD_MACROS_R4R8toRSRL |
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cph Needed for some backward compatibility with broken packages |
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#define _GLOBAL_SUM_R4(a,b) CALL GLOBAL_SUM_R4 ( a, b ) |
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#define _GLOBAL_MAX_R4(a,b) CALL GLOBAL_MAX_R4 ( a, b ) |
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#endif |
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#endif |
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|
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#define _RL Real*8 |
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#define RL_IS_REAL8 |
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#define _GLOBAL_SUM_RL(a,b) CALL GLOBAL_SUM_R8 ( a, b ) |
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#define _GLOBAL_MAX_RL(a,b) CALL GLOBAL_MAX_R8 ( a, b ) |
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#ifdef USE_OLD_MACROS_R4R8toRSRL |
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cph Needed for some backward compatibility with broken packages |
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#define _GLOBAL_SUM_R8(a,b) CALL GLOBAL_SUM_R8 ( a, b ) |
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#define _GLOBAL_MAX_R8(a,b) CALL GLOBAL_MAX_R8 ( a, b ) |
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#endif |
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#define _MPI_TYPE_RL MPI_DOUBLE_PRECISION |
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#define _MPI_TYPE_R4 MPI_REAL |
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#if (defined (TARGET_SGI) || defined (TARGET_AIX) || defined (TARGET_LAM)) |
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#define _MPI_TYPE_R8 MPI_DOUBLE_PRECISION |
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#else |
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#define _MPI_TYPE_R8 MPI_REAL8 |
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#endif |
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#define _R4 Real*4 |
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#define _R8 Real*8 |
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C- Note: a) exch macros were used to switch to JAM routines (obsolete) |
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C b) exch R4 & R8 macros are not practically used ; if needed, |
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C will directly call the corrresponding S/R. |
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#define _EXCH_XY_RS(a,b) CALL EXCH_XY_RS ( a, b ) |
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#define _EXCH_XY_RL(a,b) CALL EXCH_XY_RL ( a, b ) |
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#define _EXCH_XYZ_RS(a,b) CALL EXCH_XYZ_RS ( a, b ) |
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#define _EXCH_XYZ_RL(a,b) CALL EXCH_XYZ_RL ( a, b ) |
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#ifdef USE_OLD_MACROS_R4R8toRSRL |
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cph Needed for some backward compatibility with broken packages |
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#define _EXCH_XY_R4(a,b) CALL EXCH_XY_RS ( a, b ) |
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#define _EXCH_XY_R8(a,b) CALL EXCH_XY_RL ( a, b ) |
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#define _EXCH_XYZ_R4(a,b) CALL EXCH_XYZ_RS ( a, b ) |
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#define _EXCH_XYZ_R8(a,b) CALL EXCH_XYZ_RL ( a, b ) |
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#endif |
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|
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C-- Control use of JAM routines for Artic network (no longer supported) |
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C These invoke optimized versions of "exchange" and "sum" that |
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C utilize the programmable aspect of Artic cards. |
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CXXX No longer supported ; started to remove JAM routines. |
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CXXX #ifdef LETS_MAKE_JAM |
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CXXX #define _GLOBAL_SUM_RS(a,b) CALL GLOBAL_SUM_R8_JAM ( a, b) |
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CXXX #define _GLOBAL_SUM_RL(a,b) CALL GLOBAL_SUM_R8_JAM ( a, b ) |
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CXXX #define _EXCH_XY_RS(a,b) CALL EXCH_XY_R8_JAM ( a, b ) |
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CXXX #define _EXCH_XY_RL(a,b) CALL EXCH_XY_R8_JAM ( a, b ) |
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CXXX #define _EXCH_XYZ_RS(a,b) CALL EXCH_XYZ_R8_JAM ( a, b ) |
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CXXX #define _EXCH_XYZ_RL(a,b) CALL EXCH_XYZ_R8_JAM ( a, b ) |
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CXXX #endif |
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|
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C-- Control use of "double" precision constants. |
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C Use D0 where it means REAL*8 but not where it means REAL*16 |
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#ifdef REAL_D0_IS_16BYTES |
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#define D0 |
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#endif |
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|
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C-- Substitue for 1.D variables |
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C Sun compilers do not use 8-byte precision for literals |
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C unless .Dnn is specified. CRAY vector machines use 16-byte |
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C precision when they see .Dnn which runs very slowly! |
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#ifdef REAL_D0_IS_16BYTES |
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#define _F64( a ) a |
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#endif |
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#ifndef REAL_D0_IS_16BYTES |
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#define _F64( a ) DFLOAT( a ) |
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#endif |
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|
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#endif /* _CPP_EEMACROS_H_ */ |
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