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drop w – core “drop”
nip w1 w2 – w2 core-ext “nip”
dup w – w w core “dupe”
over w1 w2 – w1 w2 w1 core “over”
tuck w1 w2 – w2 w1 w2 core-ext “tuck”
swap w1 w2 – w2 w1 core “swap”
pick S:... u – S:... w core-ext “pick”
Actually the stack effect is x0 ... xu u -- x0 ... xu x0 .
rot w1 w2 w3 – w2 w3 w1 core “rote”
-rot w1 w2 w3 – w3 w1 w2 gforth “not-rote”
?dup w – S:... w core “question-dupe”
Actually the stack effect is: ( w -- 0 | w w ). It performs a
dup if w is nonzero.
roll x0 x1 .. xn n – x1 .. xn x0 core-ext “roll”
2drop w1 w2 – core “two-drop”
2nip w1 w2 w3 w4 – w3 w4 gforth “two-nip”
2dup w1 w2 – w1 w2 w1 w2 core “two-dupe”
2over w1 w2 w3 w4 – w1 w2 w3 w4 w1 w2 core “two-over”
2tuck w1 w2 w3 w4 – w3 w4 w1 w2 w3 w4 gforth “two-tuck”
2swap w1 w2 w3 w4 – w3 w4 w1 w2 core “two-swap”
2rot w1 w2 w3 w4 w5 w6 – w3 w4 w5 w6 w1 w2 double-ext “two-rote”