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22 lines
372 B
Fortran
22 lines
372 B
Fortran
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subroutine packbits(dbits,nsymd,m0,sym)
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! Pack 0s and 1s from dbits() into sym() with m0 bits per word.
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! NB: nsymd is the number of packed output words.
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integer sym(nsymd)
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integer*1 dbits(*)
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k=0
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do i=1,nsymd
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n=0
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do j=1,m0
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k=k+1
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m=dbits(k)
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n=ior(ishft(n,1),m)
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enddo
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sym(i)=n
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enddo
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return
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end subroutine packbits
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