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collapseos/blk/455
Virgil Dupras e31527f5ac Add word ROT>
There are many situations where it can be useful. Worth it.
2020-10-29 12:41:08 -04:00

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CODE (roll) ( "2 3 4 5 4 --> 2 4 5 5". See B311 )
CX POPx, CX 2 ADDxi, CALL, lblchkPS @ RPCn, CX 2 SUBxi,
SI SP MOVxx, SI CX ADDxx,
DI SI MOVxx, DI 2 ADDxi, STD, REPZ, MOVSB,
;CODE
CODE SWAP AX POPx, BX POPx, AX PUSHx, BX PUSHx, ;CODE
CODE DROP 1 chkPS, AX POPx, ;CODE
CODE 2DROP 2 chkPS, SP 4 ADDxi, ;CODE
CODE 2DUP 2 chkPS,
AX POPx, BX POPx,
BX PUSHx, AX PUSHx, BX PUSHx, AX PUSHx,
;CODE
CODE S0 AX PS_ADDR MOVxI, AX PUSHx, ;CODE
CODE 'S SP PUSHx, ;CODE
CODE AND 2 chkPS,
AX POPx, BX POPx, AX BX ANDxx, AX PUSHx, ;CODE