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28 lines
327 B
ArmAsm
28 lines
327 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 subeq0sp, subeqysp
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.importzp sp, tmp1, tmp2
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subeq0sp:
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ldy #0
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subeqysp:
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sec
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sta tmp1
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stx tmp2
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lda (sp),y
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sbc tmp1
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sta (sp),y
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pha
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iny
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lda (sp),y
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sbc tmp2
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sta (sp),y
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tax
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pla
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rts
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