eesupp/src/different_multiple.F

C     $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/src/different_multiple.F,v 1.1 1998/05/21 18:30:08 cnh Exp $
#include "CPP_EEOPTIONS.h"

CStartofinterface
      LOGICAL FUNCTION DIFFERENT_MULTIPLE( freq, val1, val2 )
C     /==========================================================\
C     | LOGICAL FUNCTION DIFFERENT_MULTIPLE                      |
C     | o Checks two numbers multiple of a third number.         |
C     |==========================================================|
C     | This routine is used for diagnostic and other periodic   |
C     | operations. It is very sensitive to arithmetic precision.|
C     | For IEEE conforming arithmetic is works well but for     |
C     | cases where short cut arithmetic  is used it may not work|
C     | as expected. To overcome this issue compile this routine |
C     | separately with no optimisation.                         |
C     \==========================================================/
      IMPLICIT NONE
C     Returns TRUE if val1 and val2 are different multiples of freq.
      REAL freq, val1, val2
CEndofinterface
      DIFFERENT_MULTIPLE = .FALSE.
      IF ( freq .EQ. 0. ) THEN
        DIFFERENT_MULTIPLE = .FALSE.
      ELSE
        DIFFERENT_MULTIPLE = INT(val1/freq) .NE. INT(val2/freq)
      ENDIF
      END


1	C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/src/different_multiple.F,v 1.1 1998/05/21 18:30:08 cnh Exp $
2	#include "CPP_EEOPTIONS.h"
3
4	CStartofinterface
5	LOGICAL FUNCTION DIFFERENT_MULTIPLE( freq, val1, val2 )
6	C /==========================================================\
7	C \| LOGICAL FUNCTION DIFFERENT_MULTIPLE \|
8	C \| o Checks two numbers multiple of a third number. \|
9	C \|==========================================================\|
10	C \| This routine is used for diagnostic and other periodic \|
11	C \| operations. It is very sensitive to arithmetic precision.\|
12	C \| For IEEE conforming arithmetic is works well but for \|
13	C \| cases where short cut arithmetic is used it may not work\|
14	C \| as expected. To overcome this issue compile this routine \|
15	C \| separately with no optimisation. \|
16	C \==========================================================/
17	IMPLICIT NONE
18	C Returns TRUE if val1 and val2 are different multiples of freq.
19	REAL freq, val1, val2
20	CEndofinterface
21	DIFFERENT_MULTIPLE = .FALSE.
22	IF ( freq .EQ. 0. ) THEN
23	DIFFERENT_MULTIPLE = .FALSE.
24	ELSE
25	DIFFERENT_MULTIPLE = INT(val1/freq) .NE. INT(val2/freq)
26	ENDIF
27	END
28
29