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subroutine i_c_i
include '../stack.h'
common /mtlbc/ mmode
integer top0
external memused
integer memused
integer iadr,sadr
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
top0=top
c
il2=iadr(lstk(top))
if(istk(il2).lt.0) il2=iadr(istk(il2+1))
m2=istk(il2+1)
n2=istk(il2+2)
it2=istk(il2+3)
l2=il2+4
mn2=m2*n2
top=top-1
c
il1=iadr(lstk(top))
if(istk(il1).lt.0) il1=iadr(istk(il1+1))
m1=istk(il1+1)
n1=istk(il1+2)
it1=istk(il1+3)
l1=il1+4
mn1=m1*n1
if((istk(il1).ne.istk(il2).or.it1.ne.it2).and.
$ mn1.ne.0.and.mn2.ne.0) then
top=top0
fin=-fin
return
endif
ityp=max(istk(il1),istk(il2))
c concatenation [a b]
75 if(m1.lt.0.or.m2.lt.0) then
call error(14)
return
endif
if(m2.eq.0) then
return
elseif(m1.eq.0)then
call unsfdcopy(lstk(top+2)-lstk(top+1),stk(lstk(top+1))
$ ,1,stk(lstk(top)),1)
lstk(top+1)=lstk(top)+lstk(top+2)-lstk(top+1)
return
elseif(m1.ne.m2) then
call error(5)
return
endif
c
call genconcatrow(it1,istk(l1),m1,n1,istk(l2),m2,n2)
n=n1+n2
lstk(top+1)=sadr(il1+4+memused(it1,m1*n))
istk(il1+1)=m1
istk(il1+2)=n
istk(il1+3)=it1
return
end
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