From 9e78c540dc0bc8bc80ca880a0cbd317a5a62a9fd Mon Sep 17 00:00:00 2001
From: Jeff Nichols <nicholsja@ornl.gov>
Date: Thu, 30 Jan 1997 01:43:00 +0000
Subject: [PATCH]  routine to compute and print alpha-beta spin orbital
 overlaps.

---
 src/nwdft/scf_dft/dft_mxspin_ovlp.F | 98 +++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/nwdft/scf_dft/dft_mxspin_ovlp.F

diff --git a/src/nwdft/scf_dft/dft_mxspin_ovlp.F b/src/nwdft/scf_dft/dft_mxspin_ovlp.F
new file mode 100644
index 0000000000..c70108fe21
--- /dev/null
+++ b/src/nwdft/scf_dft/dft_mxspin_ovlp.F
@@ -0,0 +1,98 @@
+      Subroutine dft_mxspin_ovlp(basis, g_alpha, g_beta, g_tmp)
+
+C$Id: dft_mxspin_ovlp.F,v 1.1 1997-01-30 01:43:00 d3h449 Exp $
+      Implicit none
+      integer basis
+      integer g_s              ! overlap
+      integer g_alpha          ! alpha eigenvecs [input]
+      integer g_beta           ! beta eigenvecs [input]
+      integer g_tmp            ! scratch space
+
+#include "bas.fh"
+#include "cdft.fh"
+#include "mafdecls.fh"
+#include "global.fh"
+#include "tcgmsg.fh"
+#include "msgids.fh"
+#include "stdio.fh"
+c
+c     local
+c
+      integer me,nproc
+c
+      integer i,j,n,m,mend
+      integer k_ord,l_ord,k_tmp,l_tmp,k_scr,l_scr
+c      
+      integer at(10), bt(10)
+      double precision prodmin, prodtmp, pt(10)
+c
+c*****************************************************************************
+c
+      me=ga_nodeid()
+      nproc=ga_nnodes()
+c     
+      if ( .not. bas_numbf(basis,nbf) ) 
+     &     call errquit(' exiting in max_ovl',1)
+c
+      call gacrea(geom,basis,nbf,nbf,'ovl ',g_s,'atom')
+c
+      if(.not.MA_Push_Get(MT_Dbl,nbf,'tmpm',l_tmp, k_tmp))
+     &     call errquit('dft_mxovl: cannot allocate tmpm',0)
+c
+      call ga_zero(g_s)
+      call int_1e_ga(basis,basis,g_s,'overlap',.false.)
+c
+c     Compute matrix mult (C_alpha)T * S * C_beta = S`
+c     
+      call ga_dgemm('T','N',nbf,nbf,nbf,1.d0,g_alpha,g_s,0.d0,g_tmp)
+      call ga_dgemm('N','N',nbf,nbf,nbf,1.d0,g_tmp,g_beta,0.d0,g_s)
+c
+      if(me.eq.0) then
+        write(LuOut, 9998)
+c        call ga_print(g_s)
+      endif
+      prodmin=0.1d0
+      if(me.eq.0) then
+        n = 0
+        do i=1,nbf
+c
+c         get row of g_s 
+c
+          call ga_get(g_s,i,i,1,nbf,DBL_MB(k_tmp),1)
+          do j=1,nbf
+            prodtmp = abs(dbl_mb(k_tmp+j-1))
+            if(prodtmp.gt.prodmin) then
+              n = n + 1
+              at(n) = i
+              bt(n) = j
+              pt(n) = prodtmp
+              if(n.ge.10.or.(i.eq.nbf.and.j.eq.nbf))then
+                mend = 10
+c                if(n.lt.10)mend = n
+                write(LuOut,9999)(at(m),m=1,mend),
+     &                           (bt(m),m=1,mend),
+     &                           (pt(m),m=1,mend)
+                n = 0
+                do m = 1, 10
+                  at(m) = 0
+                  bt(m) = 0
+                  pt(m) = 0.0d0
+                enddo
+              endif
+            endif
+          enddo
+        enddo
+      endif
+ 9998 format(/,1x,'  alpha - beta orbital overlaps ',/,
+     &         1x,'  ----------------------------- ',/)
+ 9999 format(1x,'  alpha ',10(1x,i5,1x),/
+     &       1x,'   beta ',10(1x,i5,1x),/
+     &       1x,'overlap ',10(f7.3),/)
+c
+      call gadest(g_s)
+c
+      if(.not.MA_Pop_Stack(l_tmp))
+     & call errquit('dft_mxovl: cannot pop stack',0)
+c
+      return
+      end