fallback:
	MOV	$8(X2), A1
	MOV	$SYS_clock_gettime, A7
	ECALL
	MOV	8(X2), T0	// sec
	MOV	16(X2), T1	// nsec
	MOV	$1000000000, T2
	MUL	T2, T0
	ADD	T1, T0
	MOV	T0, ret+0(FP)
	RET

// func rtsigprocmask(how int32, new, old *sigset, size int32)
TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
	MOVW	how+0(FP), A0
	MOV	new+8(FP), A1
	MOV	old+16(FP), A2
	MOVW	size+24(FP), A3
	MOV	$SYS_rt_sigprocmask, A7

	// return nsec in R7
	MOVV	$1000000000, R4
	MULVU	R4, R7, R7
	ADDVU	R5, R7
	MOVV	R7, ret+0(FP)
	RET

fallback:
	MOVV	$SYS_clock_gettime, R11
	SYSCALL
	JMP	finish

// func rtsigprocmask(how int32, new, old *sigset, size int32)
TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
	MOVW	how+0(FP), R4
	MOVV	new+8(FP), R5
	MOVV	old+16(FP), R6
	MOVW	size+24(FP), R7
	MOVV	$SYS_rt_sigprocmask, R11