Adapted div & mod for popptr1.

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IrgendwerA8
2018-05-24 03:55:40 +02:00
parent 746e3d1454
commit dd411efd1c
9 changed files with 92 additions and 122 deletions

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@@ -1,30 +0,0 @@
;
; Ullrich von Bassewitz, 07.08.1998
;
; CC65 runtime: helper stuff for mod/div/mul with signed ints
;
; When negating values, we will ignore the possibility here, that one of the
; values if $8000, in which case the negate will fail.
.export popsargs
.import negax, popax
.importzp sreg, tmp1, tmp2, ptr4
popsargs:
stx tmp2 ; Remember sign
cpx #0
bpl L1
jsr negax ; Negate accumulator
L1: sta ptr4
stx ptr4+1 ; Save right operand
jsr popax
stx tmp1 ; Remember sign
cpx #0
bpl L2
jsr negax
L2: sta sreg
stx sreg+1
rts