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C Copyright (c) 2003-2010 University of Florida
C
C This program is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C The GNU General Public License is included in this distribution
C in the file COPYRIGHT.
subroutine tensor_contraction(x1handle, x1_block, x1_ndx,
* x2handle, x2_block, x2_ndx,
* yhandle, y_block, yndx,
* array_table, narray_table,
* index_table, nindex_table,
* segment_table, nsegment_table,
* scalar_table, nscalar_table,
* address_table, flopcount)
c--------------------------------------------------------------------------
c Forms the tensor contraction of blocks x1 and x2, resulting in block y.
c x1, x2, and y are the array_table entries for their respective arrays.
c x1_block, x2_block, and y_block are the actual block indices of the
c blocks to be summed.
c
c The "cind" argument is an array of indices over which the contraction
c is performed.
c--------------------------------------------------------------------------
implicit none
include 'interpreter.h'
include 'trace.h'
#ifdef ALTIX
include 'sheap.h'
#endif
integer narray_table, nindex_table, nsegment_table
integer nscalar_table
integer array_table(larray_table_entry,narray_table)
integer index_table(lindex_table_entry,nindex_table)
integer segment_table(lsegment_table_entry,nsegment_table)
double precision scalar_table(nscalar_table)
integer*8 address_table(narray_table)
integer x1handle, x2handle, yhandle
integer x1_block, x2_block, y_block
integer x1_ndx, x2_ndx, yndx
integer flopcount
integer n1, n2, ny
integer nw, iseg, range1, range2
integer*8 iy, ix1, ix2, daddr
integer*8 get_block_index, get_index_from_base
integer stack
integer i, j, k
integer ind(4,3), cindx1(2), cindx2(2)
integer x1_type, x2_type, ytype
double precision value
double precision y(1), x1(1), x2(2)
#ifdef ALTIX
pointer (ptry, y)
pointer (ptrx1, x1)
pointer (ptrx2, x2)
#else
common y, x1, x2
#endif
integer indy(4), segy(4), ya(4), yb(4)
integer indx1(4), segx1(4), x1a(4), x1b(4)
integer indx2(4), segx2(4), x2a(4), x2b(4)
integer numy(4), numx1(4), numx2(4)
integer nya(4), nyb(4), nx1a(4), nx1b(4), nx2a(4), nx2b(4)
flopcount = 0
#ifdef ALTIX
ptry = dshptr
ptrx1 = dshptr
ptrx2 = dshptr
#endif
c------------------------------------------------------------------------
c Chcek for any scalar operands.
c------------------------------------------------------------------------
x1_type = array_table(c_array_type,x1handle)
x2_type = array_table(c_array_type,x2handle)
ytype = array_table(c_array_type,yhandle)
if (x1_type .eq. scalar_value .or.
* x2_type .eq. scalar_value .or.
* ytype .eq. scalar_value) then
print *,'Error: tensor_contraction was called with ',
* 'one or more scalar operands.'
print *,'Operands are ',x1handle, x2handle, yhandle
call abort_job()
endif
c-------------------------------------------------------------------------
c Block contraction operation.
c-------------------------------------------------------------------------
n1 = array_table(c_nindex, x1handle)
n2 = array_table(c_nindex, x2handle)
ny = array_table(c_nindex, yhandle)
c---------------------------------------------------------------------------
c Get the array segments and ranges of each block.
c---------------------------------------------------------------------------
do i = 1, ny
indy(i) = array_table(c_index_array1+i-1, yhandle)
segy(i) = index_table(c_current_seg,indy(i))
call get_index_segment(indy(i), segy(i), segment_table,
* nsegment_table, index_table,
* nindex_table, ya(i), yb(i))
numy(i) = yb(i) - ya(i) + 1
enddo
stack = array_table(c_array_stack,yhandle)
iy = get_block_index(yhandle, y_block, stack, yndx, y, .true.)
if (iy .eq. -1) then
daddr = address_table(yhandle)
if (daddr .eq. 0) then
print *,'Error: Cannot form address for array ',yhandle,
* ' block ',y_block,'.'
call dump_block_ids()
call abort_job()
endif
iy = get_index_from_base(daddr, y, 2)
do i = 1, ny
nya(i) = array_table(c_index_range1+i-1,yhandle)
nyb(i) = array_table(c_index_range2+i-1,yhandle)
enddo
else
do i = 1, ny
nya(i) = ya(i)
nyb(i) = yb(i)
enddo
endif
do i = 1, n1
indx1(i) = array_table(c_index_array1+i-1, x1handle)
segx1(i) = index_table(c_current_seg,indx1(i))
call get_index_segment(indx1(i), segx1(i), segment_table,
* nsegment_table, index_table,
* nindex_table, x1a(i), x1b(i))
numx1(i) = x1b(i) - x1a(i) + 1
enddo
stack = array_table(c_array_stack,x1handle)
ix1 = get_block_index(x1handle, x1_block, stack,
* x1_ndx, x1, .true.)
if (ix1 .eq. -1) then
daddr = address_table(x1handle)
if (daddr .eq. 0) then
print *,'Error: Cannot form address for array ',x1handle,
* ' block ',x1_block,'.'
call dump_block_ids()
call abort_job()
endif
ix1 = get_index_from_base(daddr, x1, 2)
do i = 1, n1
nx1a(i) = array_table(c_index_range1+i-1,x1handle)
nx1b(i) = array_table(c_index_range2+i-1,x1handle)
enddo
else
do i = 1, n1
nx1a(i) = x1a(i)
nx1b(i) = x1b(i)
enddo
endif
do i = 1, n2
indx2(i) = array_table(c_index_array1+i-1, x2handle)
segx2(i) = index_table(c_current_seg,indx2(i))
call get_index_segment(indx2(i), segx2(i), segment_table,
* nsegment_table, index_table,
* nindex_table, x2a(i), x2b(i))
numx2(i) = x2b(i) - x2a(i) + 1
enddo
stack = array_table(c_array_stack,x2handle)
ix2 = get_block_index(x2handle, x2_block, stack,
* x2_ndx, x2, .true.)
if (ix2 .eq. -1) then
daddr = address_table(x2handle)
if (daddr .eq. 0) then
print *,'Error: Cannot form address for array ',x2handle,
* ' block ',x2_block,'.'
call dump_block_ids()
call abort_job()
endif
ix2 = get_index_from_base(daddr, x2, 2)
do i = 1, n2
nx2a(i) = array_table(c_index_range1+i-1,x2handle)
nx2b(i) = array_table(c_index_range2+i-1,x2handle)
enddo
else
do i = 1, n2
nx2a(i) = x2a(i)
nx2b(i) = x2b(i)
enddo
endif
if (ny .ne. 4 .or. n1 .ne. 2 .or. n2 .ne. 2) then
print *,'Error: Improper array dimensions for ',
* ' tensor_contraction: got ny, n1, n2 = ',
* ny,n1,n2,' should be 4, 2, 2.'
print *,'Array handles: ',yhandle, x1handle, x2handle
print *,' y: ',yhandle,y_block, yndx
print *,' x1: ',x1handle, x1_block,x1_ndx
print *,' x2: ',x2handle, x2_block,x2_ndx
call abort_job()
endif
call twork4222(y(iy),nya(1),nyb(1),nya(2),nyb(2),
* nya(3),nyb(3),nya(4),nyb(4),
* ya(1),yb(1),ya(2),yb(2),ya(3),yb(3),
* ya(4),yb(4),indy,
* x1(ix1),nx1a(1),nx1b(1), nx1a(2),nx1b(2),
* x1a(1),x1b(1),x1a(2),x1b(2), indx1,
* x2(ix2),nx2a(1),nx2b(1), nx2a(2),nx2b(2),
* x2a(1),x2b(1),x2a(2),x2b(2),indx2,
* flopcount)
return
end
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