xref: /phasta/svLS/DOT.f (revision 712d3df0b59ebebaaeaea358162c8d2c043c6e08)
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40
41      FUNCTION DOTV(dof, nNo, commu, U, V)
42
43      INCLUDE "svLS_STD.h"
44
45      INTEGER, INTENT(IN) :: dof, nNo
46      TYPE(svLS_commuType), INTENT(IN) :: commu
47      REAL*8, INTENT(IN) :: V(dof,nNo), U(dof,nNo)
48
49      INTEGER i, ierr
50      REAL*8 tmp, DOTV
51
52      DOTV = 0D0
53      SELECT CASE(dof)
54      CASE(1)
55         DO i=1, nNo
56            DOTV = DOTV + U(1,i)*V(1,i)
57         END DO
58      CASE(2)
59         DO i=1, nNo
60            DOTV = DOTV + U(1,i)*V(1,i) + U(2,i)*V(2,i)
61         END DO
62      CASE(3)
63         DO i=1, nNo
64            DOTV = DOTV + U(1,i)*V(1,i) + U(2,i)*V(2,i) +U(3,i)*V(3,i)
65         END DO
66      CASE(4)
67         DO i=1, nNo
68            DOTV = DOTV + U(1,i)*V(1,i) + U(2,i)*V(2,i)
69     2                  + U(3,i)*V(3,i) + U(4,i)*V(4,i)
70         END DO
71      CASE DEFAULT
72         DO i=1, nNo
73            DOTV = DOTV + SUM(U(:,i)*V(:,i))
74         END DO
75      END SELECT
76
77      IF (commu%nTasks .EQ. 1) RETURN
78
79      CALL MPI_ALLREDUCE(DOTV, tmp, 1, mpreal, MPI_SUM, commu%comm,
80     2   ierr)
81
82      DOTV = tmp
83
84      RETURN
85      END FUNCTION DOTV
86
87!====================================================================
88
89      FUNCTION DOTS(nNo, commu, U, V)
90
91      INCLUDE "svLS_STD.h"
92
93      INTEGER, INTENT(IN) :: nNo
94      TYPE(svLS_commuType), INTENT(IN) :: commu
95      REAL*8, INTENT(IN) :: V(nNo), U(nNo)
96
97      INTEGER i, ierr
98      REAL*8 tmp, DOTS
99
100      DOTS = 0D0
101      DO i=1, nNo
102         DOTS = DOTS + U(i)*V(i)
103      END DO
104
105      IF (commu%nTasks .EQ. 1) RETURN
106
107      CALL MPI_ALLREDUCE(DOTS, tmp, 1, mpreal, MPI_SUM, commu%comm,
108     2   ierr)
109
110      DOTS = tmp
111
112      RETURN
113      END FUNCTION DOTS
114