//	struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT,$0
	MOVW    addr+0(FP), R0
	MOVW    op+4(FP), R1
	MOVW    val+8(FP), R2
	MOVW    ts+12(FP), R3
	MOVW    addr2+16(FP), R4
	MOVW    val3+20(FP), R5
	MOVW	$SYS_futex, R7
	SWI	$0
	MOVW	R0, ret+24(FP)
	RET

// int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT,$0

        protected void buildSort(final QueryContext queryContext, final QueryFieldConfig queryFieldConfig, final FessConfig fessConfig) {
            queryContext.sortBuilders().forEach(sortBuilder -> searchRequestBuilder.addSort(sortBuilder));
        }

        protected void buildRescorer(final QueryHelper queryHelper, final QueryFieldConfig queryFieldConfig, final FessConfig fessConfig) {

//	struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT,$0
	MOVQ	addr+0(FP), DI
	MOVL	op+8(FP), SI
	MOVL	val+12(FP), DX
	MOVQ	ts+16(FP), R10
	MOVQ	addr2+24(FP), R8
	MOVL	val3+32(FP), R9
	MOVL	$SYS_futex, AX
	SYSCALL
	MOVL	AX, ret+40(FP)
	RET

// int32 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0

//	struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
	MOVD	addr+0(FP), R3
	MOVW	op+8(FP), R4
	MOVW	val+12(FP), R5
	MOVD	ts+16(FP), R6
	MOVD	addr2+24(FP), R7
	MOVW	val3+32(FP), R8
	SYSCALL	$SYS_futex
	BVC	2(PC)
	NEG	R3	// caller expects negative errno
	MOVW	R3, ret+40(FP)
	RET

// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));

//	struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
	MOVD	addr+0(FP), R0
	MOVW	op+8(FP), R1
	MOVW	val+12(FP), R2
	MOVD	ts+16(FP), R3
	MOVD	addr2+24(FP), R4
	MOVW	val3+32(FP), R5
	MOVD	$SYS_futex, R8
	SVC
	MOVW	R0, ret+40(FP)
	RET

// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0

//	struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT,$0
	MOVL	$SYS_futex, AX
	MOVL	addr+0(FP), BX
	MOVL	op+4(FP), CX
	MOVL	val+8(FP), DX
	MOVL	ts+12(FP), SI
	MOVL	addr2+16(FP), DI
	MOVL	val3+20(FP), BP
	INVOKE_SYSCALL
	MOVL	AX, ret+24(FP)
	RET

// int32 clone(int32 flags, void *stack, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT,$0
	MOVL	$SYS_clone, AX

	case ir.OSLICE, ir.OSLICEARR, ir.OSLICESTR, ir.OSLICE3, ir.OSLICE3ARR:
		n := n.(*ir.SliceExpr)
		return walkSlice(n, init)

	case ir.ONEW:
		n := n.(*ir.UnaryExpr)
		return walkNew(n, init)

	case ir.OADDSTR:
		return walkAddString(n.(*ir.AddStringExpr), init)

	case ir.OAPPEND:
		// order should make sure we only see OAS(node, OAPPEND), which we handle above.
		base.Fatalf("append outside assignment")

	// needPerThreadSyscall indicates that a per-thread syscall is required
	// for doAllThreadsSyscall.
	needPerThreadSyscall atomic.Uint8
}

//go:noescape
func futex(addr unsafe.Pointer, op int32, val uint32, ts, addr2 unsafe.Pointer, val3 uint32) int32

// Linux futex.
//
//	futexsleep(uint32 *addr, uint32 val)
//	futexwakeup(uint32 *addr)
//
// Futexsleep atomically checks if *addr == val and if so, sleeps on addr.

	logf := func(format string, args ...any) {
		mu.Lock()
		defer mu.Unlock()
		fmt.Fprintf(&buf, format, args...)
		buf.WriteByte('\n')
	}

	addrStr := cst.ts.Listener.Addr().String()
	ip, port, err := net.SplitHostPort(addrStr)
	if err != nil {
		t.Fatal(err)
	}

	// Install a fake DNS server.

	{name: "Add8", argLength: 2, commutative: true}, // arg0 + arg1
	{name: "Add16", argLength: 2, commutative: true},
	{name: "Add32", argLength: 2, commutative: true},
	{name: "Add64", argLength: 2, commutative: true},
	{name: "AddPtr", argLength: 2}, // For address calculations.  arg0 is a pointer and arg1 is an int.
	{name: "Add32F", argLength: 2, commutative: true},
	{name: "Add64F", argLength: 2, commutative: true},