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cc65/libsrc/runtime/lruntime.s
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101 lines
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ArmAsm

;
; lruntime.s
;
; Ullrich von Bassewitz, 22.06.1998
;
; Runtime support for longs.
.import popax, pusheax, staspic
.importzp sp, sreg, tmp2, ptr1
;
; leax (sp),y
;
.export ldeax0sp, ldeaxysp
ldeax0sp:
ldy #3
ldeaxysp:
lda (sp),y
sta sreg+1
dey
lda (sp),y
sta sreg
dey
lda (sp),y
tax
dey
lda (sp),y
rts
;
; push a long from (sp),y
;
.export pushlysp
pushlysp:
iny
iny
lda (sp),y
iny
sta sreg
lda (sp),y
sta sreg+1
dey
dey
lda (sp),y
dey
tax
lda (sp),y
jmp pusheax
;
; eax --> ((sp)); pop
;
.export steaxspp
steaxspp:
pha
txa
pha
jsr popax ; get address
sta ptr1
stx ptr1+1
ldy #3
lda sreg+1
sta (ptr1),y
dey
lda sreg
sta (ptr1),y
dey
pla
tax
sta (ptr1),y
dey
pla
sta (ptr1),y
rts
;
; eax --> ((sp)),y
;
.export steaxspidx
steaxspidx:
jsr staspic ; Get pointer, store a
pha
iny
lda tmp2
sta (ptr1),y
iny
tax
lda sreg
sta (ptr1),y
iny
lda sreg+1
sta (ptr1),y
pla
rts