//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)

(IsInBounds      idx len) => (LessThanU  (CMP idx len))
(IsSliceInBounds idx len) => (LessEqualU (CMP idx len))

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

// Absorb pseudo-ops into blocks.
(If (Equal         cc) yes no) => (EQ cc yes no)
(If (NotEqual      cc) yes no) => (NE cc yes no)

  // Note: Usage of the return value of this function may not be interleaved
  // with insertions to the callers map. This could occur if GetCallers is
  // called with two separate functions, the 2nd one incurs a resize and then
  // both first and 2nd stored callers are used.
  ArrayRef<Operation*> GetCallers(func::FuncOp fn);

  // Mapping between ValuePort (which corresponds to an OpResult or smaller,

	case OpEqPtr:
		return rewriteValueRISCV64_OpEqPtr(v)
	case OpFMA:
		v.Op = OpRISCV64FMADDD
		return true
	case OpGetCallerPC:
		v.Op = OpRISCV64LoweredGetCallerPC
		return true
	case OpGetCallerSP:
		v.Op = OpRISCV64LoweredGetCallerSP
		return true
	case OpGetClosurePtr:
		v.Op = OpRISCV64LoweredGetClosurePtr
		return true
	case OpHmul32:
		return rewriteValueRISCV64_OpHmul32(v)
	case OpHmul32u: