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cc65/libsrc/runtime/lor.s

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;
; Ullrich von Bassewitz, 06.08.1998
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; Christian Krueger, 11-Mar-2017, added 65SC02 optimization
;
; CC65 runtime: or on longs
;
.export tosor0ax, tosoreax
.import addysp1
.importzp sp, sreg, tmp1
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.macpack cpu
tosor0ax:
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.if (.cpu .bitand ::CPU_ISET_65SC02)
stz sreg
stz sreg+1
.else
ldy #$00
sty sreg
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sty sreg+1
.endif
tosoreax:
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.if (.cpu .bitand ::CPU_ISET_65SC02)
ora (sp)
ldy #1
.else
ldy #0
ora (sp),y ; byte 0
iny
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.endif
sta tmp1
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