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cc65/libsrc/runtime/lor.s

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;
; Ullrich von Bassewitz, 06.08.1998
;
; CC65 runtime: or on longs
;
.export tosoreax
.import addysp1
.importzp sp, sreg, tmp1
tosoreax:
ldy #0
ora (sp),y ; byte 0
sta tmp1
iny
txa
ora (sp),y ; byte 1
tax
iny
lda sreg
ora (sp),y ; byte 2
sta sreg
iny
lda sreg+1
ora (sp),y ; byte 3
sta sreg+1
lda tmp1
jmp addysp1