_type{"uint16", 16, false},
	_type{"int32", 32, true},
	_type{"uint32", 32, false},
	_type{"int64", 64, true},
	_type{"uint64", 64, false},
	_type{"int", 8 * uint(unsafe.Sizeof(int(0))), true},
	_type{"uint", 8 * uint(unsafe.Sizeof(uint(0))), false},
	_type{"uintptr", 8 * uint(unsafe.Sizeof((*byte)(nil))), false},
}

type binop struct {
	name string
	eval func(x, y *big.Int) *big.Int
}

var binops = []binop{

// ConvIfaceTypeWord asserts that n is conversion to interface type,
// and returns an expression that yields the *runtime._type or
// *runtime.itab value necessary for implementing the conversion.
//
//   - *runtime._type for the destination type, for I2I conversions
//   - *runtime.itab, for T2I conversions
//   - *runtime._type for the source type, for T2E conversions
func ConvIfaceTypeWord(pos src.XPos, n *ir.ConvExpr) ir.Node {

	}
}

// Keep this code in sync with cmd/compile/internal/walk/builtin.go:walkUnsafeSlice
func unsafeslice64(et *_type, ptr unsafe.Pointer, len64 int64) {
	len := int(len64)
	if int64(len) != len64 {
		panicunsafeslicelen1(getcallerpc())
	}
	unsafeslice(et, ptr, len)
}

func unsafeslicecheckptr(et *_type, ptr unsafe.Pointer, len64 int64) {
	unsafeslice64(et, ptr, len64)

	if tid == 0 {
		return nil, plainError("missing tid")
	}

	f := efaceOf(&fn)
	if f._type == nil || f._type.Kind_&abi.KindMask != abi.Func {
		return nil, plainError("fn must be a function")
	}
	fv := (*funcval)(f.data)

	a := efaceOf(&stackArgs)
	if a._type != nil && a._type.Kind_&abi.KindMask != abi.Pointer {
		return nil, plainError("args must be a pointer or nil")
	}
	argp := a.data

import (
	"unsafe"
)

const raceenabled = false

// Because raceenabled is false, none of these functions should be called.

func raceReadObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr)  { throw("race") }
func raceWriteObjectPC(t *_type, addr unsafe.Pointer, callerpc, pc uintptr) { throw("race") }
func raceinit() (uintptr, uintptr)                                          { throw("race"); return 0, 0 }

// pointer into non-Go memory.
//
// This is called from generated code when GOEXPERIMENT=cgocheck2 is enabled.
//
//go:nosplit
//go:nowritebarrier
func cgoCheckMemmove(typ *_type, dst, src unsafe.Pointer) {
	cgoCheckMemmove2(typ, dst, src, 0, typ.Size_)
}

// cgoCheckMemmove2 is called when moving a block of memory.
// dst and src point off bytes into the value to copy.

		// treat it as such.
		// 1. If it is a non-empty interface, the pointer points to an itab
		//    which is always in persistentalloc space.
		// 2. If it is an empty interface, the pointer points to a _type.
		//   a. If it is a compile-time-allocated type, it points into
		//      the read-only data section.
		//   b. If it is a reflect-allocated type, it points into the Go heap.

// license that can be found in the LICENSE file.

package runtime

import "internal/abi"

// isDirectIface reports whether t is stored directly in an interface value.
func isDirectIface(t *_type) bool {
	return t.Kind_&abi.KindDirectIface != 0

	Inter   *InterfaceType
	CanFail bool
}
type TypeAssertCache struct {
	Mask    uintptr
	Entries [1]TypeAssertCacheEntry
}
type TypeAssertCacheEntry struct {
	// type of source value (a *runtime._type)
	Typ uintptr
	// itab to use for result (a *runtime.itab)
	// nil if CanFail is set and conversion would fail.
	Itab uintptr

	dx    uint32 /* ... */
	cx    uint32 /* ... */
	ax    uint32 /* ... */
	gs    uint32 /* data segments */
	fs    uint32 /* ... */
	es    uint32 /* ... */
	ds    uint32 /* ... */
	trap  uint32 /* trap _type */
	ecode uint32 /* error code (or zero) */
	pc    uint32 /* pc */
	cs    uint32 /* old context */
	flags uint32 /* old flags */
	sp    uint32
	ss    uint32 /* old stack segment */
}

type sigctxt struct {