fdrop
r -- float "fdrop"
fnip
r1 r2 -- r2 gforth "fnip"
fdup
r -- r r float "fdup"
fover
r1 r2 -- r1 r2 r1 float "fover"
ftuck
r1 r2 -- r2 r1 r2 gforth "ftuck"
fswap
r1 r2 -- r2 r1 float "fswap"
frot
r1 r2 r3 -- r2 r3 r1 float "frot"