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30 lines
535 B
ArmAsm
30 lines
535 B
ArmAsm
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; Ullrich von Bassewitz, 05.08.1998
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; CC65 runtime: sub ints reversed
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;
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.export tosrsuba0, tosrsubax
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.import addysp1
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.importzp sp, tmp1
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;
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; AX = AX - TOS
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;
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tosrsuba0:
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ldx #0
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tosrsubax:
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ldy #0
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sec
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sbc (sp),y ; lo byte
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sta tmp1 ; save lo byte
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txa
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iny
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sbc (sp),y ; hi byte
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tax
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lda tmp1
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jmp addysp1 ; drop TOS, set condition codes
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