collapseos/blk/398

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: IF ( -- a | a: br cell addr )
0x3f ( ?br ) , H@ 1 ALLOT ( br cell allot )
; IMMEDIATE
: THEN ( a -- | a: br cell addr )
DUP H@ -^ _bchk SWAP ( a-H a ) C!
; IMMEDIATE
: ELSE ( a1 -- a2 | a1: IF cell a2: ELSE cell )
0x3b ( br ) ,
1 ALLOT
[COMPILE] THEN
H@ 1- ( push a. 1- for allot offset )
; IMMEDIATE