shithub: riscv

ref: d41ca0d32cac02ee12733b0710d8eae3f34c6a4c
dir: /sys/src/libc/amd64/tas.s/

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TEXT	_tas(SB), 1, $0

	MOVL	$0xdeaddead,AX
	XCHGL	AX,(RARG)
	RET