diff options
Diffstat (limited to 'sys/vops/alut.gx')
| -rw-r--r-- | sys/vops/alut.gx | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/sys/vops/alut.gx b/sys/vops/alut.gx new file mode 100644 index 00000000..f4e01fb3 --- /dev/null +++ b/sys/vops/alut.gx @@ -0,0 +1,22 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +# ALUT -- Map an array using table lookup. Note that an input value of zero +# indexes the first element of the lookup table. No bounds checking is +# performed. + +procedure alut$t (a, b, npix, lut) + +$if (datatype == rd) +int a[ARB] # input array of indices +$else +PIXEL a[ARB] +$endif + +PIXEL b[ARB] # output data array +PIXEL lut[ARB] # lookup table +int npix, i + +begin + do i = 1, npix + b[i] = lut[a[i]+1] +end |