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authorDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
committerDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
commit67d25d837ac55f28a366c0a3b262e439a6e75fc3 (patch)
treedf7715c7724c5935ab87c807f3b8b4ef529315e3 /amforth-6.5/avr8/words/doplusloop.asm
parente0d6784e89dba33226c0edb815bb974486fa7c48 (diff)
Add AmForth
Diffstat (limited to 'amforth-6.5/avr8/words/doplusloop.asm')
-rw-r--r--amforth-6.5/avr8/words/doplusloop.asm28
1 files changed, 28 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/words/doplusloop.asm b/amforth-6.5/avr8/words/doplusloop.asm
new file mode 100644
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--- /dev/null
+++ b/amforth-6.5/avr8/words/doplusloop.asm
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+; ( n1 -- ) (R: loop-sys1 -- loop-sys2| )
+; System
+; runtime of +loop
+;VE_DOPLUSLOOP:
+; .dw $ff07
+; .db "(+loop)"
+; .dw VE_HEAD
+; .set VE_HEAD = VE_DOPLUSLOOP
+XT_DOPLUSLOOP:
+ .dw PFA_DOPLUSLOOP
+PFA_DOPLUSLOOP:
+ pop zl
+ pop zh
+ add zl, tosl
+ adc zh, tosh
+ loadtos
+ brvs PFA_DOPLUSLOOP_LEAVE
+ ; next cycle
+PFA_DOPLUSLOOP_NEXT:
+ ; next iteration
+ push zh
+ push zl
+ rjmp PFA_DOBRANCH ; read next cell from dictionary and jump to its destination
+PFA_DOPLUSLOOP_LEAVE:
+ pop temp0
+ pop temp1 ; remove limit
+ adiw xl, 1 ; skip branch-back address
+ jmp_ DO_NEXT