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108 lines
1.1 KiB
ArmAsm
108 lines
1.1 KiB
ArmAsm
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; lruntime.s
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; Ullrich von Bassewitz, 22.06.1998
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; Runtime support for longs.
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.import popax, pusheax
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.importzp sp, sreg, tmp1, tmp2, tmp3, ptr1
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;
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; leax (sp),y
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;
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.export ldeax0sp, ldeaxysp
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ldeax0sp:
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ldy #3
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ldeaxysp:
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lda (sp),y
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sta sreg+1
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dey
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lda (sp),y
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sta sreg
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dey
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lda (sp),y
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tax
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dey
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lda (sp),y
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rts
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;
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; push a long from (sp),y
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;
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.export pushlysp
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pushlysp:
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iny
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iny
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lda (sp),y
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iny
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sta sreg
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lda (sp),y
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sta sreg+1
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dey
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dey
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lda (sp),y
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dey
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tax
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lda (sp),y
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jmp pusheax
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;
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; eax --> ((sp)); pop
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;
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.export steaxspp
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steaxspp:
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pha
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txa
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pha
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jsr popax ; get address
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sta ptr1
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stx ptr1+1
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ldy #3
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lda sreg+1
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sta (ptr1),y
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dey
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lda sreg
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sta (ptr1),y
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dey
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pla
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tax
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sta (ptr1),y
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dey
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pla
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sta (ptr1),y
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rts
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;
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; eax --> ((sp)),y
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;
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.export steaxspidx
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steaxspidx:
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sta tmp1
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stx tmp2
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sty tmp3
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jsr popax ; get the pointer
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sta ptr1
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stx ptr1+1
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ldy tmp3
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lda tmp1
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sta (ptr1),y
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iny
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lda tmp2
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sta (ptr1),y
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iny
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tax
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lda sreg
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sta (ptr1),y
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iny
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lda sreg+1
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sta (ptr1),y
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lda tmp1
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rts
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