..., word1, word2| swap |
Stack
..., word2, word1 ..., word1, word2
Description The top two words on the operand stack are swapped.
The swap instruction must not be used unless each of word2 and word1 is a word that contains a 32-bit data type.
Notes Except for restrictions preserving the integrity of 64-bit data types, the swap instruction operates on untyped words, ignoring the types of the data they contain.