29 lines
248 B
C
29 lines
248 B
C
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/**
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* @r0=@r0-@r1
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* r7=len
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*/
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void long_xsub() __naked
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{
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__asm
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.globl long_xsub
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.globl long_xsubb
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long_xsub:
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clr c
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long_xsubb:
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movx a,@r1
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mov b,a
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movx a,@r0
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subb a,b
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movx @r0,a
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inc r0
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inc r1
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djnz r7,long_xsubb
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ret
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__endasm;
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}
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