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35 lines
375 B
ArmAsm
35 lines
375 B
ArmAsm
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; Ullrich von Bassewitz, 08.10.1998
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; CC65 runtime: += operator for longs on the stack
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;
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.export laddeq0sp, laddeqysp
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.importzp sp, sreg
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laddeq0sp:
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ldy #0
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laddeqysp:
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clc
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adc (sp),y
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sta (sp),y
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pha
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iny
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txa
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adc (sp),y
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sta (sp),y
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tax
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iny
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lda sreg
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adc (sp),y
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sta (sp),y
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sta sreg
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iny
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lda sreg+1
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adc (sp),y
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sta (sp),y
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sta sreg+1
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pla
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rts
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