// This file is machine generated by gen.go.
// 6g gen.go && 6l gen.6 && ./6.out >expr1.go

package eval

import (
	"big"
	"log"
)

/*
 * "As" functions.  These retrieve evaluator functions from an
 * expr, panicking if the requested evaluator has the wrong type.
 */
func (a *expr) asBool() func(*Thread) bool {
	return a.eval.(func(*Thread) bool)
}
func (a *expr) asUint() func(*Thread) uint64 {
	return a.eval.(func(*Thread) uint64)
}
func (a *expr) asInt() func(*Thread) int64 {
	return a.eval.(func(*Thread) int64)
}
func (a *expr) asIdealInt() func() *big.Int {
	return a.eval.(func() *big.Int)
}
func (a *expr) asFloat() func(*Thread) float64 {
	return a.eval.(func(*Thread) float64)
}
func (a *expr) asIdealFloat() func() *big.Rat {
	return a.eval.(func() *big.Rat)
}
func (a *expr) asString() func(*Thread) string {
	return a.eval.(func(*Thread) string)
}
func (a *expr) asArray() func(*Thread) ArrayValue {
	return a.eval.(func(*Thread) ArrayValue)
}
func (a *expr) asStruct() func(*Thread) StructValue {
	return a.eval.(func(*Thread) StructValue)
}
func (a *expr) asPtr() func(*Thread) Value {
	return a.eval.(func(*Thread) Value)
}
func (a *expr) asFunc() func(*Thread) Func {
	return a.eval.(func(*Thread) Func)
}
func (a *expr) asSlice() func(*Thread) Slice {
	return a.eval.(func(*Thread) Slice)
}
func (a *expr) asMap() func(*Thread) Map {
	return a.eval.(func(*Thread) Map)
}
func (a *expr) asMulti() func(*Thread) []Value {
	return a.eval.(func(*Thread) []Value)
}

func (a *expr) asInterface() func(*Thread) interface{} {
	switch sf := a.eval.(type) {
	case func(t *Thread) bool:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) uint64:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) int64:
		return func(t *Thread) interface{} { return sf(t) }
	case func() *big.Int:
		return func(*Thread) interface{} { return sf() }
	case func(t *Thread) float64:
		return func(t *Thread) interface{} { return sf(t) }
	case func() *big.Rat:
		return func(*Thread) interface{} { return sf() }
	case func(t *Thread) string:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) ArrayValue:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) StructValue:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) Value:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) Func:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) Slice:
		return func(t *Thread) interface{} { return sf(t) }
	case func(t *Thread) Map:
		return func(t *Thread) interface{} { return sf(t) }
	default:
		log.Panicf("unexpected expression node type %T at %v", a.eval, a.pos)
	}
	panic("fail")
}

/*
 * Operator generators.
 */

func (a *expr) genConstant(v Value) {
	switch a.t.lit().(type) {
	case *boolType:
		a.eval = func(t *Thread) bool { return v.(BoolValue).Get(t) }
	case *uintType:
		a.eval = func(t *Thread) uint64 { return v.(UintValue).Get(t) }
	case *intType:
		a.eval = func(t *Thread) int64 { return v.(IntValue).Get(t) }
	case *idealIntType:
		val := v.(IdealIntValue).Get()
		a.eval = func() *big.Int { return val }
	case *floatType:
		a.eval = func(t *Thread) float64 { return v.(FloatValue).Get(t) }
	case *idealFloatType:
		val := v.(IdealFloatValue).Get()
		a.eval = func() *big.Rat { return val }
	case *stringType:
		a.eval = func(t *Thread) string { return v.(StringValue).Get(t) }
	case *ArrayType:
		a.eval = func(t *Thread) ArrayValue { return v.(ArrayValue).Get(t) }
	case *StructType:
		a.eval = func(t *Thread) StructValue { return v.(StructValue).Get(t) }
	case *PtrType:
		a.eval = func(t *Thread) Value { return v.(PtrValue).Get(t) }
	case *FuncType:
		a.eval = func(t *Thread) Func { return v.(FuncValue).Get(t) }
	case *SliceType:
		a.eval = func(t *Thread) Slice { return v.(SliceValue).Get(t) }
	case *MapType:
		a.eval = func(t *Thread) Map { return v.(MapValue).Get(t) }
	default:
		log.Panicf("unexpected constant type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genIdentOp(level, index int) {
	a.evalAddr = func(t *Thread) Value { return t.f.Get(level, index) }
	switch a.t.lit().(type) {
	case *boolType:
		a.eval = func(t *Thread) bool { return t.f.Get(level, index).(BoolValue).Get(t) }
	case *uintType:
		a.eval = func(t *Thread) uint64 { return t.f.Get(level, index).(UintValue).Get(t) }
	case *intType:
		a.eval = func(t *Thread) int64 { return t.f.Get(level, index).(IntValue).Get(t) }
	case *floatType:
		a.eval = func(t *Thread) float64 { return t.f.Get(level, index).(FloatValue).Get(t) }
	case *stringType:
		a.eval = func(t *Thread) string { return t.f.Get(level, index).(StringValue).Get(t) }
	case *ArrayType:
		a.eval = func(t *Thread) ArrayValue { return t.f.Get(level, index).(ArrayValue).Get(t) }
	case *StructType:
		a.eval = func(t *Thread) StructValue { return t.f.Get(level, index).(StructValue).Get(t) }
	case *PtrType:
		a.eval = func(t *Thread) Value { return t.f.Get(level, index).(PtrValue).Get(t) }
	case *FuncType:
		a.eval = func(t *Thread) Func { return t.f.Get(level, index).(FuncValue).Get(t) }
	case *SliceType:
		a.eval = func(t *Thread) Slice { return t.f.Get(level, index).(SliceValue).Get(t) }
	case *MapType:
		a.eval = func(t *Thread) Map { return t.f.Get(level, index).(MapValue).Get(t) }
	default:
		log.Panicf("unexpected identifier type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genFuncCall(call func(t *Thread) []Value) {
	a.exec = func(t *Thread) { call(t) }
	switch a.t.lit().(type) {
	case *boolType:
		a.eval = func(t *Thread) bool { return call(t)[0].(BoolValue).Get(t) }
	case *uintType:
		a.eval = func(t *Thread) uint64 { return call(t)[0].(UintValue).Get(t) }
	case *intType:
		a.eval = func(t *Thread) int64 { return call(t)[0].(IntValue).Get(t) }
	case *floatType:
		a.eval = func(t *Thread) float64 { return call(t)[0].(FloatValue).Get(t) }
	case *stringType:
		a.eval = func(t *Thread) string { return call(t)[0].(StringValue).Get(t) }
	case *ArrayType:
		a.eval = func(t *Thread) ArrayValue { return call(t)[0].(ArrayValue).Get(t) }
	case *StructType:
		a.eval = func(t *Thread) StructValue { return call(t)[0].(StructValue).Get(t) }
	case *PtrType:
		a.eval = func(t *Thread) Value { return call(t)[0].(PtrValue).Get(t) }
	case *FuncType:
		a.eval = func(t *Thread) Func { return call(t)[0].(FuncValue).Get(t) }
	case *SliceType:
		a.eval = func(t *Thread) Slice { return call(t)[0].(SliceValue).Get(t) }
	case *MapType:
		a.eval = func(t *Thread) Map { return call(t)[0].(MapValue).Get(t) }
	case *MultiType:
		a.eval = func(t *Thread) []Value { return call(t) }
	default:
		log.Panicf("unexpected result type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genValue(vf func(*Thread) Value) {
	a.evalAddr = vf
	switch a.t.lit().(type) {
	case *boolType:
		a.eval = func(t *Thread) bool { return vf(t).(BoolValue).Get(t) }
	case *uintType:
		a.eval = func(t *Thread) uint64 { return vf(t).(UintValue).Get(t) }
	case *intType:
		a.eval = func(t *Thread) int64 { return vf(t).(IntValue).Get(t) }
	case *floatType:
		a.eval = func(t *Thread) float64 { return vf(t).(FloatValue).Get(t) }
	case *stringType:
		a.eval = func(t *Thread) string { return vf(t).(StringValue).Get(t) }
	case *ArrayType:
		a.eval = func(t *Thread) ArrayValue { return vf(t).(ArrayValue).Get(t) }
	case *StructType:
		a.eval = func(t *Thread) StructValue { return vf(t).(StructValue).Get(t) }
	case *PtrType:
		a.eval = func(t *Thread) Value { return vf(t).(PtrValue).Get(t) }
	case *FuncType:
		a.eval = func(t *Thread) Func { return vf(t).(FuncValue).Get(t) }
	case *SliceType:
		a.eval = func(t *Thread) Slice { return vf(t).(SliceValue).Get(t) }
	case *MapType:
		a.eval = func(t *Thread) Map { return vf(t).(MapValue).Get(t) }
	default:
		log.Panicf("unexpected result type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genUnaryOpNeg(v *expr) {
	switch a.t.lit().(type) {
	case *uintType:
		vf := v.asUint()
		a.eval = func(t *Thread) uint64 { v := vf(t); return -v }
	case *intType:
		vf := v.asInt()
		a.eval = func(t *Thread) int64 { v := vf(t); return -v }
	case *idealIntType:
		val := v.asIdealInt()()
		val.Neg(val)
		a.eval = func() *big.Int { return val }
	case *floatType:
		vf := v.asFloat()
		a.eval = func(t *Thread) float64 { v := vf(t); return -v }
	case *idealFloatType:
		val := v.asIdealFloat()()
		val.Neg(val)
		a.eval = func() *big.Rat { return val }
	default:
		log.Panicf("unexpected type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genUnaryOpNot(v *expr) {
	switch a.t.lit().(type) {
	case *boolType:
		vf := v.asBool()
		a.eval = func(t *Thread) bool { v := vf(t); return !v }
	default:
		log.Panicf("unexpected type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genUnaryOpXor(v *expr) {
	switch a.t.lit().(type) {
	case *uintType:
		vf := v.asUint()
		a.eval = func(t *Thread) uint64 { v := vf(t); return ^v }
	case *intType:
		vf := v.asInt()
		a.eval = func(t *Thread) int64 { v := vf(t); return ^v }
	case *idealIntType:
		val := v.asIdealInt()()
		val.Not(val)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", a.t, a.pos)
	}
}

func (a *expr) genBinOpLogAnd(l, r *expr) {
	lf := l.asBool()
	rf := r.asBool()
	a.eval = func(t *Thread) bool { return lf(t) && rf(t) }
}

func (a *expr) genBinOpLogOr(l, r *expr) {
	lf := l.asBool()
	rf := r.asBool()
	a.eval = func(t *Thread) bool { return lf(t) || rf(t) }
}

func (a *expr) genBinOpAdd(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l + r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l + r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l + r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l + r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l + r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l + r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l + r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l + r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l + r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l + r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Add(l, r)
		a.eval = func() *big.Int { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		switch t.Bits {
		case 32:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l + r
				return float64(float32(ret))
			}
		case 64:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l + r
				return float64(float64(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Add(l, r)
		a.eval = func() *big.Rat { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) string {
			l, r := lf(t), rf(t)
			return l + r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpSub(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l - r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l - r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l - r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l - r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l - r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l - r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l - r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l - r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l - r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l - r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Sub(l, r)
		a.eval = func() *big.Int { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		switch t.Bits {
		case 32:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l - r
				return float64(float32(ret))
			}
		case 64:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l - r
				return float64(float64(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Sub(l, r)
		a.eval = func() *big.Rat { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpMul(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l * r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l * r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l * r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l * r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l * r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l * r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l * r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l * r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l * r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l * r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Mul(l, r)
		a.eval = func() *big.Int { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		switch t.Bits {
		case 32:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l * r
				return float64(float32(ret))
			}
		case 64:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				ret = l * r
				return float64(float64(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Mul(l, r)
		a.eval = func() *big.Rat { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpQuo(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Quo(l, r)
		a.eval = func() *big.Int { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		switch t.Bits {
		case 32:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return float64(float32(ret))
			}
		case 64:
			a.eval = func(t *Thread) float64 {
				l, r := lf(t), rf(t)
				var ret float64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l / r
				return float64(float64(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Quo(l, r)
		a.eval = func() *big.Rat { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpRem(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				if r == 0 {
					t.Abort(DivByZeroError{})
				}
				ret = l % r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Rem(l, r)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpAnd(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l & r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l & r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l & r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l & r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l & r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l & r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l & r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l & r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l & r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l & r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.And(l, r)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpOr(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l | r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l | r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l | r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l | r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l | r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l | r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l | r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l | r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l | r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l | r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Or(l, r)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpXor(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l ^ r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l ^ r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l ^ r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l ^ r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l ^ r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l ^ r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l ^ r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l ^ r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l ^ r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l ^ r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Xor(l, r)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpAndNot(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l &^ r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l &^ r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l &^ r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l &^ r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l &^ r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l &^ r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l &^ r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l &^ r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l &^ r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l &^ r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.AndNot(l, r)
		a.eval = func() *big.Int { return val }
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpShl(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l << r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l << r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l << r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l << r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l << r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l << r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l << r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l << r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l << r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l << r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpShr(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l >> r
				return uint64(uint8(ret))
			}
		case 16:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l >> r
				return uint64(uint16(ret))
			}
		case 32:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l >> r
				return uint64(uint32(ret))
			}
		case 64:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l >> r
				return uint64(uint64(ret))
			}
		case 0:
			a.eval = func(t *Thread) uint64 {
				l, r := lf(t), rf(t)
				var ret uint64
				ret = l >> r
				return uint64(uint(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	case *intType:
		lf := l.asInt()
		rf := r.asUint()
		switch t.Bits {
		case 8:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l >> r
				return int64(int8(ret))
			}
		case 16:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l >> r
				return int64(int16(ret))
			}
		case 32:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l >> r
				return int64(int32(ret))
			}
		case 64:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l >> r
				return int64(int64(ret))
			}
		case 0:
			a.eval = func(t *Thread) int64 {
				l, r := lf(t), rf(t)
				var ret int64
				ret = l >> r
				return int64(int(ret))
			}
		default:
			log.Panicf("unexpected size %d in type %v at %v", t.Bits, t, a.pos)
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpLss(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l < r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l < r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) < 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l < r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) < 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l < r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpGtr(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l > r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l > r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) > 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l > r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) > 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l > r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpLeq(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l <= r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l <= r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) <= 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l <= r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) <= 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l <= r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpGeq(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l >= r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l >= r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) >= 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l >= r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) >= 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l >= r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpEql(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *boolType:
		lf := l.asBool()
		rf := r.asBool()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) == 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) == 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *PtrType:
		lf := l.asPtr()
		rf := r.asPtr()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *FuncType:
		lf := l.asFunc()
		rf := r.asFunc()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	case *MapType:
		lf := l.asMap()
		rf := r.asMap()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l == r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func (a *expr) genBinOpNeq(l, r *expr) {
	switch t := l.t.lit().(type) {
	case *boolType:
		lf := l.asBool()
		rf := r.asBool()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *uintType:
		lf := l.asUint()
		rf := r.asUint()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *intType:
		lf := l.asInt()
		rf := r.asInt()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *idealIntType:
		l := l.asIdealInt()()
		r := r.asIdealInt()()
		val := l.Cmp(r) != 0
		a.eval = func(t *Thread) bool { return val }
	case *floatType:
		lf := l.asFloat()
		rf := r.asFloat()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *idealFloatType:
		l := l.asIdealFloat()()
		r := r.asIdealFloat()()
		val := l.Cmp(r) != 0
		a.eval = func(t *Thread) bool { return val }
	case *stringType:
		lf := l.asString()
		rf := r.asString()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *PtrType:
		lf := l.asPtr()
		rf := r.asPtr()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *FuncType:
		lf := l.asFunc()
		rf := r.asFunc()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	case *MapType:
		lf := l.asMap()
		rf := r.asMap()
		a.eval = func(t *Thread) bool {
			l, r := lf(t), rf(t)
			return l != r
		}
	default:
		log.Panicf("unexpected type %v at %v", l.t, a.pos)
	}
}

func genAssign(lt Type, r *expr) func(lv Value, t *Thread) {
	switch lt.lit().(type) {
	case *boolType:
		rf := r.asBool()
		return func(lv Value, t *Thread) { lv.(BoolValue).Set(t, rf(t)) }
	case *uintType:
		rf := r.asUint()
		return func(lv Value, t *Thread) { lv.(UintValue).Set(t, rf(t)) }
	case *intType:
		rf := r.asInt()
		return func(lv Value, t *Thread) { lv.(IntValue).Set(t, rf(t)) }
	case *floatType:
		rf := r.asFloat()
		return func(lv Value, t *Thread) { lv.(FloatValue).Set(t, rf(t)) }
	case *stringType:
		rf := r.asString()
		return func(lv Value, t *Thread) { lv.(StringValue).Set(t, rf(t)) }
	case *ArrayType:
		rf := r.asArray()
		return func(lv Value, t *Thread) { lv.Assign(t, rf(t)) }
	case *StructType:
		rf := r.asStruct()
		return func(lv Value, t *Thread) { lv.Assign(t, rf(t)) }
	case *PtrType:
		rf := r.asPtr()
		return func(lv Value, t *Thread) { lv.(PtrValue).Set(t, rf(t)) }
	case *FuncType:
		rf := r.asFunc()
		return func(lv Value, t *Thread) { lv.(FuncValue).Set(t, rf(t)) }
	case *SliceType:
		rf := r.asSlice()
		return func(lv Value, t *Thread) { lv.(SliceValue).Set(t, rf(t)) }
	case *MapType:
		rf := r.asMap()
		return func(lv Value, t *Thread) { lv.(MapValue).Set(t, rf(t)) }
	default:
		log.Panicf("unexpected left operand type %v at %v", lt, r.pos)
	}
	panic("fail")
}