{"int64tofloat32", funcTag, 138},
	{"uint64tofloat64", funcTag, 139},
	{"uint64tofloat32", funcTag, 140},
	{"uint32tofloat64", funcTag, 141},
	{"complex128div", funcTag, 142},
	{"getcallerpc", funcTag, 143},
	{"getcallersp", funcTag, 143},
	{"racefuncenter", funcTag, 31},
	{"racefuncexit", funcTag, 9},
	{"raceread", funcTag, 31},
	{"racewrite", funcTag, 31},
	{"racereadrange", funcTag, 144},

	traceback1(pc, sp, lr, gp, 0)
}

// tracebacktrap is like traceback but expects that the PC and SP were obtained
// from a trap, not from gp->sched or gp->syscallpc/gp->syscallsp or getcallerpc/getcallersp.
// Because they are from a trap instead of from a saved pair,
// the initial PC must not be rewound to the previous instruction.
// (All the saved pairs record a PC that is a return address, so we

	{name: "GetClosurePtr"},                       // get closure pointer from dedicated register
	{name: "GetCallerPC"},                         // for getcallerpc intrinsic
	{name: "GetCallerSP", argLength: 1},           // for getcallersp intrinsic. arg0=mem.

	// Indexing operations

			panic("nil lockedm on locked goroutine")
		}
	}
	return gp.m.lockedExt, gp.m.lockedInt
}

//go:noinline
func TracebackSystemstack(stk []uintptr, i int) int {
	if i == 0 {
		pc, sp := getcallerpc(), getcallersp()
		var u unwinder
		u.initAt(pc, sp, 0, getg(), unwindJumpStack) // Don't ignore errors, for testing
		return tracebackPCs(&u, 0, stk)
	}
	n := 0
	systemstack(func() {

			// Otherwise, before making a VDSO call we save the g to the
			// bottom of the signal stack. Fetch from there.
			// TODO: in efence mode, stack is sysAlloc'd, so this wouldn't
			// work.
			sp := getcallersp()
			s := spanOf(sp)
			if s != nil && s.state.get() == mSpanManual && s.base() < sp && sp < s.limit {
				gp := *(**g)(unsafe.Pointer(s.base()))
				return gp
			}
			return nil
		}
	}

//go:nosplit
//go:linkname entersyscall
func entersyscall() {
	// N.B. getcallerfp cannot be written directly as argument in the call
	// to reentersyscall because it forces spilling the other arguments to
	// the stack. This results in exceeding the nosplit stack requirements
	// on some platforms.
	fp := getcallerfp()
	reentersyscall(getcallerpc(), getcallersp(), fp)
}

func entersyscall_sysmon() {
	lock(&sched.lock)

	resetLibcall := false
	if mp.profilehz != 0 && mp.libcallsp == 0 {
		// leave pc/sp for cpu profiler
		mp.libcallg.set(gp)
		mp.libcallpc = getcallerpc()
		// sp must be the last, because once async cpu profiler finds
		// all three values to be non-zero, it will use them
		mp.libcallsp = getcallersp()
		resetLibcall = true // See comment in sys_darwin.go:libcCall
	}
	asmcgocall(asmstdcallAddr, unsafe.Pointer(&mp.libcall))

(IsInBounds idx len) => (SGTU len idx)
(IsSliceInBounds idx len) => (XOR (MOVVconst [1]) (SGTU idx len))

// pseudo-ops
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)

(If cond yes no) => (NE (MOVBUreg <typ.UInt64> cond) yes no)

// Write barrier.
(WB ...) => (LoweredWB ...)

(IsInBounds ...) => (Less64U ...)
(IsSliceInBounds ...) => (Leq64U ...)

// Trivial lowering
(NilCheck ...) => (LoweredNilCheck ...)
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)

// Write barrier.
(WB ...) => (LoweredWB ...)

// Publication barrier as intrinsic
(PubBarrier ...) => (LoweredPubBarrier ...)

(IsInBounds idx len) => (SGTU len idx)
(IsSliceInBounds idx len) => (XOR (MOVVconst [1]) (SGTU idx len))

// pseudo-ops
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)

(If cond yes no) => (NE cond yes no)

// Write barrier.
(WB ...) => (LoweredWB ...)