Eliminate another toFloat64.
Eliminate another toFloat64.

ihc/futhark,HIPERFIT/futhark,mrakgr/futhark,HIPERFIT/futhark,mrakgr/futhark,CulpaBS/wbBach,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,ihc/futhark,ihc/futhark,diku-dk/futhark,mrakgr/futhark,diku-dk/futhark,HIPERFIT/futhark