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; Ullrich von Bassewitz, 06.08.1998
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; CC65 runtime: negation on longs
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;
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;
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; eax = -eax
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;
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.export negeax
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.importzp sreg
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negeax: clc
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eor #$FF
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adc #1
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pha
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txa
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eor #$FF
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adc #0
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tax
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lda sreg
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eor #$FF
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adc #0
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sta sreg
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lda sreg+1
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eor #$FF
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adc #0
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sta sreg+1
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pla
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rts
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