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25 lines
390 B
ArmAsm
25 lines
390 B
ArmAsm
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; Ullrich von Bassewitz, 08.10.1998
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; CC65 runtime: += operator for ints on the stack
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;
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.export addeq0sp, addeqysp
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.importzp c_sp
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addeq0sp:
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ldy #0
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addeqysp:
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clc
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adc (c_sp),y
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sta (c_sp),y
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pha
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iny
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txa
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adc (c_sp),y
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sta (c_sp),y
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tax
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pla
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rts
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