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subroutine i_m_i
c multiplication
include '../stack.h'
integer is1
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
c
if(istk(il1).ne.8.or.istk(il2).ne.8) then
top=top+1
fin=-fin
return
endif
if(it1.ne.it2) then
top=top+1
fin=-fin
return
endif
10 continue
if (mn1 .eq. 1) then
c . cst*a
is1 = istk(l1)
if (m1.lt.0) then
if(mn2.eq.1) then
c . eye*cst
istk(il1+1)=m1
istk(il1+2)=n1
istk(il1+3)=it1
else
call error(14)
return
endif
else
istk(il1+1)=m2
istk(il1+2)=n2
istk(il1+3)=it1
endif
call gencopy(it1,1,istk(l1),1,is1,1)
call gencopy(it1,mn2,istk(l2),1,istk(l1),1)
call genscal(it1,mn2,is1,istk(l1),1)
lstk(top+1)=sadr(l1+memused(it1,mn2))
elseif (mn2 .eq. 1) then
c . a*cst
if(m2.lt.0) then
call error(14)
return
endif
call genscal(it1,mn1,istk(l2),istk(l1),1)
else
c . matrix*matrix
if (n1 .ne. m2) then
call error(10)
return
endif
lr=l2+mn2
err=sadr(lr+m1*n2)-lstk(bot)
if(err.gt.0) then
call error(17)
return
endif
call genmmul(it1,istk(l1),m1,istk(l2),m2,istk(lr),m1,m1,n1,n2)
call gencopy(it1,m1*n2,istk(lr),1,istk(l1),1)
lstk(top+1)=sadr(l1+memused(it1,m1*n2))
istk(il1+2)=n2
istk(il1+3)=it1
endif
999 return
end
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