TEXT runtime·nsec(SB),NOSPLIT|NOFRAME,$0-12
	MOVW	$SYS_NSEC, R0
	SWI	$0
	MOVW	arg+0(FP), R1
	MOVW	0(R1), R0
	MOVW	R0, ret_lo+4(FP)
	MOVW	4(R1), R0
	MOVW	R0, ret_hi+8(FP)
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$12-12
	// use nsec system call to get current time in nanoseconds
	MOVW	$sysnsec_lo-8(SP), R0	// destination addr
	MOVW	R0,res-12(SP)
	MOVW	$SYS_NSEC, R0

//go:nosplit
func nanotime1() int64 {
	tp := &timespec{}
	if clock_gettime(_CLOCK_REALTIME, tp) != 0 {
		throw("syscall clock_gettime failed")
	}
	return tp.tv_sec*1000000000 + tp.tv_nsec
}

func walltime() (sec int64, nsec int32) {
	ts := &timespec{}
	if clock_gettime(_CLOCK_REALTIME, ts) != 0 {
		throw("syscall clock_gettime failed")
	}
	return ts.tv_sec, int32(ts.tv_nsec)
}

//go:nosplit

		systemstack(func() {
			println("runtime: errno", -errno)
			throw("clock_gettime failed")
		})
	}
	return ts.tv_sec*1e9 + int64(ts.tv_nsec)
}
func clock_gettime_trampoline()

//go:nosplit
func walltime() (int64, int32) {
	var ts timespec
	args := struct {
		clock_id int32
		tp       unsafe.Pointer
	}{_CLOCK_REALTIME, unsafe.Pointer(&ts)}

TEXT runtime·setitimer(SB),NOSPLIT,$-8
	MOVL	mode+0(FP), DI		// arg 1 - which
	MOVQ	new+8(FP), SI		// arg 2 - itv
	MOVQ	old+16(FP), DX		// arg 3 - oitv
	MOVL	$SYS___setitimer50, AX
	SYSCALL
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVQ	$CLOCK_REALTIME, DI	// arg 1 - clock_id
	LEAQ	8(SP), SI		// arg 2 - tp
	MOVL	$SYS___clock_gettime50, AX
	SYSCALL
	MOVQ	8(SP), AX		// sec

	RET

TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0
	MOVW mode+0(FP), R0	// arg 1 - which
	MOVW new+4(FP), R1	// arg 2 - itv
	MOVW old+8(FP), R2	// arg 3 - oitv
	SWI $SYS___setitimer50
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVW $0, R0	// CLOCK_REALTIME
	MOVW $8(R13), R1
	SWI $SYS___clock_gettime50

	MOVW 8(R13), R0	// sec.low
	MOVW 12(R13), R1 // sec.high

	MOVL	$37, AX		// kill
	SYSCALL
	RET

TEXT runtime·setitimer(SB), NOSPLIT, $-8
	MOVL	mode+0(FP), DI
	MOVQ	new+8(FP), SI
	MOVQ	old+16(FP), DX
	MOVL	$83, AX
	SYSCALL
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVL	$232, AX // clock_gettime
	MOVQ	$0, DI  	// CLOCK_REALTIME
	LEAQ	8(SP), SI
	SYSCALL
	MOVQ	8(SP), AX	// sec
	MOVQ	16(SP), DX	// nsec

	MOVW	mode+0(FP), R4		// arg 1 - mode
	MOVV	new+8(FP), R5		// arg 2 - new value
	MOVV	old+16(FP), R6		// arg 3 - old value
	MOVV	$69, R2			// sys_setitimer
	SYSCALL
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVW	CLOCK_REALTIME, R4	// arg 1 - clock_id
	MOVV	$8(R29), R5		// arg 2 - tp
	MOVV	$87, R2			// sys_clock_gettime
	SYSCALL

	MOVL	$SYS_madvise, AX
	INT	$0x80
	JAE	2(PC)
	MOVL	$-1, AX
	MOVL	AX, ret+12(FP)
	RET

TEXT runtime·setitimer(SB),NOSPLIT,$-4
	MOVL	$SYS___setitimer50, AX
	INT	$0x80
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	LEAL	12(SP), BX
	MOVL	$CLOCK_REALTIME, 4(SP)	// arg 1 - clock_id
	MOVL	BX, 8(SP)		// arg 2 - tp
	MOVL	$SYS___clock_gettime50, AX
	INT	$0x80

	RET

TEXT runtime·setitimer(SB),NOSPLIT,$-8
	MOVW	mode+0(FP), R0		// arg 1 - which
	MOVD	new+8(FP), R1		// arg 2 - itv
	MOVD	old+16(FP), R2		// arg 3 - oitv
	SVC	$SYS___setitimer50
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
	MOVW	$CLOCK_REALTIME, R0	// arg 1 - clock_id
	MOVD	$8(RSP), R1		// arg 2 - tp
	SVC	$SYS___clock_gettime50

	MOVD	8(RSP), R0		// sec

}

func usleep1(usec uint32)

//go:nosplit
func usleep_no_g(µs uint32) {
	usleep1(µs)
}

//go:nosplit
func usleep(µs uint32) {
	usleep1(µs)
}

func walltime() (sec int64, nsec int32) {
	var ts mts
	sysvicall2(&libc_clock_gettime, _CLOCK_REALTIME, uintptr(unsafe.Pointer(&ts)))
	return ts.tv_sec, int32(ts.tv_nsec)
}

//go:nosplit