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subroutine bitops(op)
c addition
include '../stack.h'
common /mtlbc/ mmode
integer is1,top0,op
external memused
integer memused
integer iadr,sadr
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
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.8.or.istk(il2).ne.8).or.(it1.ne.it2)).and.
$ mn1.ne.0.and.mn2.ne.0) then
top=top+1
fin=-fin
return
endif
07 continue
if (mn1.eq.0) then
call error(43)
return
elseif (mn2.eq.0) then
call error(43)
return
elseif (m1 .lt. 0) then
c . eye+vector
call error(43)
return
elseif (m2 .lt. 0) then
c . vector+eye
call error(43)
return
elseif (mn2.eq.1) then
c . vector+const
call genbitops(it1,op,mn1,istk(l2),0,istk(l1),1)
lstk(top+1)=sadr(l1+memused(it1,mn1))
elseif (mn1.eq.1) then
c . cst+vector
call gencopy(it1,1,istk(l1),1,is1,1)
call gencopy(it1,mn2,istk(l2),1,istk(l1),1)
call genbitops(it1,op,mn2,is1,0,istk(l1),1)
lstk(top+1)=sadr(l1+memused(it1,mn2))
istk(il1+1)=m2
istk(il1+2)=n2
else
c . vector+vector
if (m1 .ne. m2.or.n1 .ne. n2) then
call error(8)
return
endif
call genbitops(it1,op,mn1,istk(l2),1,istk(l1),1)
lstk(top+1)=sadr(l1+memused(it1,mn1))
endif
999 return
end
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