diff options
Diffstat (limited to 'sys/vops/abltk.gx')
| -rw-r--r-- | sys/vops/abltk.gx | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sys/vops/abltk.gx b/sys/vops/abltk.gx new file mode 100644 index 00000000..8d11cb09 --- /dev/null +++ b/sys/vops/abltk.gx @@ -0,0 +1,45 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +# ABLTK -- Vector boolean less than constant. C[i], type INT, is set to 1 if +# A[i] is less than B, else C[i] is set to zero. + +procedure abltk$t (a, b, c, npix) + +PIXEL a[ARB] +PIXEL b +int c[ARB] +int npix +int i +$if (datatype == x) +real abs_b +$endif + +begin + # The case b==0 is perhaps worth optimizing. On many machines this + # will save a memory fetch. + + if (b == 0$f) { + $if (datatype == x) + call aclri (c, npix) + $else + do i = 1, npix + if (a[i] < 0) + c[i] = 1 + else + c[i] = 0 + $endif + } else { + $if (datatype == x) + abs_b = abs (b) + $endif + do i = 1, npix + $if (datatype == x) + if (abs (a[i]) < abs_b) + $else + if (a[i] < b) + $endif + c[i] = 1 + else + c[i] = 0 + } +end |