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subroutine i_triu(id)
INCLUDE '../stack.h'
integer id(nsiz)
external memused
integer memused
c
integer tops
integer iadr,sadr
c
iadr(l)=l+l-1
sadr(l)=(l/2)+1
c
if (lhs .ne. 1) then
call error(41)
return
endif
if(rhs.gt.2) then
call error(42)
return
endif
tops=top
c
k = 0
if (rhs .eq. 2) then
il=iadr(lstk(top))
if(istk(il).lt.0) il=iadr(istk(il+1))
if(istk(il).ne.1.and.istk(il).ne.8) then
err=1
call error(53)
return
endif
if(istk(il).eq.1) then
if(istk(il+3).ne.0) then
err=1
call error(52)
return
endif
k = int(stk(sadr(il+4)))
else
call tpconv(istk(il+3), 4, 1, istk(il+4),1, k,1)
endif
top = top-1
endif
il=iadr(lstk(top))
ilr=il
if(istk(il).lt.0) il=iadr(istk(il+1))
c standard matrix case
m=istk(il+1)
n=istk(il+2)
mn=m*n
it=istk(il+3)
l=il+4
if(il.ne.ilr) then
lr=ilr+4
err=sadr(lr+memused(it,mn))-lstk(bot)
if(err.gt.0) then
call error(17)
return
endif
call icopy(4,istk(il),1,istk(ilr),1)
call gencopy(it,mn,istk(l),1,istk(lr),1)
lstk(top+1)=sadr(lr+memused(it,mn))
l=lr
endif
call gentriu(it,m,n,k,istk(l))
return
end
c
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