GNU/Linux |
CentOS 4.8 |
i386 |
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cscal(l) |
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subroutine cscal(n,ca,cx,incx)
c scales a vector by a constant.
c jack dongarra, linpack, 3/11/78.
c modified to correct problem with negative increment,
8/21/90.
complex ca,cx(1)
integer i,incx,ix,n
if(n.le.0)return
if(incx.eq.1)go to 20
c code for increment not equal to 1
ix = 1
if(incx.lt.0)ix = (-n+1)*incx + 1
do 10 i = 1,n
cx(ix) = ca*cx(ix)
ix = ix + incx
10 continue
return
c code for increment equal to 1
20 do 30 i = 1,n
cx(i) = ca*cx(i)
30 continue
return
end
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cscal(l) |
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