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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/cmove_g.asm
parente0d6784e89dba33226c0edb815bb974486fa7c48 (diff)
Add AmForth
Diffstat (limited to 'amforth-6.5/avr8/words/cmove_g.asm')
-rw-r--r--amforth-6.5/avr8/words/cmove_g.asm34
1 files changed, 34 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/words/cmove_g.asm b/amforth-6.5/avr8/words/cmove_g.asm
new file mode 100644
index 0000000..3bcbb4e
--- /dev/null
+++ b/amforth-6.5/avr8/words/cmove_g.asm
@@ -0,0 +1,34 @@
+; (addr-from addr-to n -- )
+; Memory
+; copy data in RAM from higher to lower addresses.
+VE_CMOVE_G:
+ .dw $ff06
+ .db "cmove>"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_CMOVE_G
+XT_CMOVE_G:
+ .dw PFA_CMOVE_G
+PFA_CMOVE_G:
+ push xh
+ push xl
+ ld zl, Y+
+ ld zh, Y+ ; addr-to
+ ld xl, Y+
+ ld xh, Y+ ; addr-from
+ mov temp0, tosh
+ or temp0, tosl
+ brbs 1, PFA_CMOVE_G1
+ add zl, tosl
+ adc zh, tosh
+ add xl, tosl
+ adc xh, tosh
+PFA_CMOVE_G2:
+ ld temp1, -X
+ st -Z, temp1
+ sbiw tosl, 1
+ brbc 1, PFA_CMOVE_G2
+PFA_CMOVE_G1:
+ pop xl
+ pop xh
+ loadtos
+ jmp_ DO_NEXT