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23 lines
262 B
ArmAsm
23 lines
262 B
ArmAsm
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; Ullrich von Bassewitz, 06.08.1998
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; CC65 runtime: boolean negation for longs
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;
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.export bnegeax
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.importzp sreg, tmp1
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bnegeax:
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stx tmp1
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ldx #0 ; High byte of result
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ora tmp1
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ora sreg
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ora sreg+1
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bne @L0
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lda #1
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rts
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@L0: txa ; X is zero
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rts
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