TEXT _xinc(SB), 1, $0				/* void _xinc(long*); */
	MOVL	l+0(FP), AX
	LOCK;	INCL 0(AX)
	RET

TEXT _xdec(SB), 1, $0				/* long _xdec(long*); */
	MOVL	l+0(FP), BX
	XORL	AX, AX
	LOCK;	DECL 0(BX)
	JLT	_xdeclt
	JGT	_xdecgt
	RET
_xdecgt:
	INCL	AX
	RET
_xdeclt:
	DECL	AX
	RET