r.reclass
Creates a new map layer whose category values are based upon a reclassification of the categories in an existing raster map layer.
Raster (r.*)
ParameterRaster|input|Input raster layer|False
ParameterFile|rules|File containing reclass rules|-
ParameterString|txtrules|Reclass rules text (if rule file not used)|None|True|True
OutputRaster|output|Reclassified