cli/q
Code Issues 1 Pull Requests Activity

Implemented Value interface

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This commit is contained in:
Eduard Urbach 2025-02-28 12:15:19 +01:00
parent 31423ccc08
commit b67361c035
Signed by: akyoto
GPG Key ID: C874F672B1AF20C0
36 changed files with 194 additions and 153 deletions
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8
src/core/ArrayElementToRegister.go
View File

@ -24,7 +24,7 @@ func (f *Function) ArrayElementToRegister(node *expression.Expression, register
index := node.Children[1]
memory := asm.Memory{
Base: array.Register,
Base: array.Value.Register,
Offset: 0,
OffsetRegister: math.MaxUint8,
Length: byte(1),
@ -50,11 +50,11 @@ func (f *Function) ArrayElementToRegister(node *expression.Expression, register
defer f.UseVariable(indexVariable)
if !types.Is(indexVariable.Type, types.AnyInt) {
return nil, errors.New(&errors.TypeMismatch{Encountered: indexVariable.Type.Name(), Expected: types.AnyInt.Name()}, f.File, index.Token.Position)
if !types.Is(indexVariable.Value.Typ, types.AnyInt) {
return nil, errors.New(&errors.TypeMismatch{Encountered: indexVariable.Value.Typ.Name(), Expected: types.AnyInt.Name()}, f.File, index.Token.Position)
}
memory.OffsetRegister = indexVariable.Register
memory.OffsetRegister = indexVariable.Value.Register
default:
typ, err := f.ExpressionToRegister(index, register)

2
src/core/Compare.go
View File

@ -21,7 +21,7 @@ func (f *Function) Compare(comparison *expression.Expression) error {
}
defer f.UseVariable(variable)
return f.Execute(comparison.Token, variable.Register, right)
return f.Execute(comparison.Token, variable.Value.Register, right)
}
if ast.IsFunctionCall(left) && right.IsLeaf() {

2
src/core/CompileAssign.go
View File

@ -20,7 +20,7 @@ func (f *Function) CompileAssign(node *ast.Assign) error {
}
defer f.UseVariable(variable)
return f.Execute(node.Expression.Token, variable.Register, right)
return f.Execute(node.Expression.Token, variable.Value.Register, right)
}
if left.Token.Kind == token.Dot {

10
src/core/CompileAssignArray.go
View File

@ -25,7 +25,7 @@ func (f *Function) CompileAssignArray(node *ast.Assign) error {
defer f.UseVariable(variable)
memory := asm.Memory{
Base: variable.Register,
Base: variable.Value.Register,
Offset: 0,
OffsetRegister: math.MaxUint8,
Length: byte(1),
@ -38,18 +38,18 @@ func (f *Function) CompileAssignArray(node *ast.Assign) error {
return err
}
if !types.Is(index.Type, types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: index.Type.Name(), Expected: types.AnyInt.Name()}, f.File, indexExpr.Token.Position)
if !types.Is(index.Type(), types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: index.Type().Name(), Expected: types.AnyInt.Name()}, f.File, indexExpr.Token.Position)
}
switch index.Kind {
switch index := index.(type) {
case eval.Number:
memory.Offset = int8(index.Number)
case eval.Register:
memory.OffsetRegister = index.Register
defer f.FreeRegister(index.Register)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, index.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, index))
}
_, err = f.ExpressionToMemory(right, memory)

16
src/core/CompileAssignDivision.go
View File

@ -36,8 +36,8 @@ func (f *Function) CompileAssignDivision(expr *expression.Expression) error {
return err
}
quotientVariable.Type = types.Int
remainderVariable.Type = types.Int
quotientVariable.Value.Typ = types.Int
remainderVariable.Value.Typ = types.Int
f.AddVariable(quotientVariable)
f.AddVariable(remainderVariable)
} else {
@ -68,13 +68,13 @@ func (f *Function) CompileAssignDivision(expr *expression.Expression) error {
return err
}
if !types.Is(dividend.Type, types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: dividend.Type.Name(), Expected: types.AnyInt.Name()}, f.File, dividendExpr.Token.Position)
if !types.Is(dividend.Type(), types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: dividend.Type().Name(), Expected: types.AnyInt.Name()}, f.File, dividendExpr.Token.Position)
}
divisor := division.Children[1]
switch dividend.Kind {
switch dividend := dividend.(type) {
case eval.Number:
f.SaveRegister(x86.RAX)
f.RegisterNumber(asm.MOVE, x86.RAX, dividend.Number)
@ -83,10 +83,10 @@ func (f *Function) CompileAssignDivision(expr *expression.Expression) error {
err = f.Execute(division.Token, dividend.Register, divisor)
defer f.FreeRegister(dividend.Register)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, dividend.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, dividend))
}
f.RegisterRegister(asm.MOVE, quotientVariable.Register, x86.RAX)
f.RegisterRegister(asm.MOVE, remainderVariable.Register, x86.RDX)
f.RegisterRegister(asm.MOVE, quotientVariable.Value.Register, x86.RAX)
f.RegisterRegister(asm.MOVE, remainderVariable.Value.Register, x86.RDX)
return err
}

4
src/core/CompileAssignField.go
View File

@ -22,7 +22,7 @@ func (f *Function) CompileAssignField(node *ast.Assign) error {
}
defer f.UseVariable(variable)
pointer := variable.Type.(*types.Pointer)
pointer := variable.Value.Typ.(*types.Pointer)
structure := pointer.To.(*types.Struct)
field := structure.FieldByName(fieldName)
@ -31,7 +31,7 @@ func (f *Function) CompileAssignField(node *ast.Assign) error {
}
memory := asm.Memory{
Base: variable.Register,
Base: variable.Value.Register,
Offset: int8(field.Offset),
OffsetRegister: math.MaxUint8,
Length: byte(field.Type.Size()),

8
src/core/CompileCondition.go
View File

@ -75,11 +75,11 @@ func (f *Function) CompileCondition(condition *expression.Expression, successLab
return err
}
if !types.Is(value.Type, types.Bool) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type.Name(), Expected: types.Bool.Name()}, f.File, condition.Token.Position)
if !types.Is(value.Type(), types.Bool) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type().Name(), Expected: types.Bool.Name()}, f.File, condition.Token.Position)
}
switch value.Kind {
switch value := value.(type) {
case eval.Number:
if value.Number == 0 {
f.Jump(asm.JUMP, failLabel)
@ -89,7 +89,7 @@ func (f *Function) CompileCondition(condition *expression.Expression, successLab
f.FreeRegister(value.Register)
f.Jump(asm.JE, failLabel)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, value.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, value))
}
return nil

8
src/core/CompileDefinition.go
View File

@ -21,7 +21,7 @@ func (f *Function) CompileDefinition(node *ast.Define) error {
return err
}
typ, err := f.ExpressionToRegister(right, variable.Register)
typ, err := f.ExpressionToRegister(right, variable.Value.Register)
if err != nil {
return err
@ -35,7 +35,7 @@ func (f *Function) CompileDefinition(node *ast.Define) error {
typ = types.Int
}
variable.Type = typ
variable.Value.Typ = typ
f.AddVariable(variable)
return nil
}
@ -63,10 +63,10 @@ func (f *Function) CompileDefinition(node *ast.Define) error {
}
if count < len(types) {
variable.Type = types[count]
variable.Value.Typ = types[count]
}
f.RegisterRegister(asm.MOVE, variable.Register, f.CPU.Output[count])
f.RegisterRegister(asm.MOVE, variable.Value.Register, f.CPU.Output[count])
f.AddVariable(variable)
count++
return nil

4
src/core/CompileDelete.go
View File

@ -20,8 +20,8 @@ func (f *Function) CompileDelete(root *expression.Expression) error {
defer f.UseVariable(variable)
f.SaveRegister(f.CPU.Input[0])
f.SaveRegister(f.CPU.Input[1])
f.RegisterRegister(asm.MOVE, f.CPU.Input[0], variable.Register)
f.RegisterNumber(asm.MOVE, f.CPU.Input[1], variable.Type.(*types.Pointer).To.Size())
f.RegisterRegister(asm.MOVE, f.CPU.Input[0], variable.Value.Register)
f.RegisterNumber(asm.MOVE, f.CPU.Input[1], variable.Value.Typ.(*types.Pointer).To.Size())
f.CallSafe(f.All.Functions["mem.free"], f.CPU.Input[:2])
return nil
}

10
src/core/CompileFor.go
View File

@ -40,7 +40,7 @@ func (f *Function) CompileFor(loop *ast.For) error {
return err
}
counter = variable.Register
counter = variable.Value.Register
from = loop.Head.Children[1].Children[0]
to = loop.Head.Children[1].Children[1]
f.AddVariable(variable)
@ -67,20 +67,20 @@ func (f *Function) CompileFor(loop *ast.For) error {
return err
}
if !types.Is(value.Type, types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type.Name(), Expected: types.AnyInt.Name()}, f.File, to.Token.Position)
if !types.Is(value.Type(), types.AnyInt) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type().Name(), Expected: types.AnyInt.Name()}, f.File, to.Token.Position)
}
f.AddLabel(label)
switch value.Kind {
switch value := value.(type) {
case eval.Number:
f.RegisterNumber(asm.COMPARE, counter, value.Number)
case eval.Register:
f.RegisterRegister(asm.COMPARE, counter, value.Register)
defer f.FreeRegister(value.Register)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, value.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, value))
}
f.Jump(asm.JGE, labelEnd)

10
src/core/CompileLen.go
View File

@ -21,8 +21,8 @@ func (f *Function) CompileLen(root *expression.Expression) error {
return err
}
if !types.Is(value.Type, types.AnyArray) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type.Name(), Expected: types.AnyArray.Name(), ParameterName: "array"}, f.File, root.Children[1].Token.Position)
if !types.Is(value.Type(), types.AnyArray) {
return errors.New(&errors.TypeMismatch{Encountered: value.Type().Name(), Expected: types.AnyArray.Name(), ParameterName: "array"}, f.File, root.Children[1].Token.Position)
}
memory := asm.Memory{
@ -34,17 +34,17 @@ func (f *Function) CompileLen(root *expression.Expression) error {
output := f.CPU.Output[0]
f.SaveRegister(output)
switch value.Kind {
switch value := value.(type) {
case eval.Register:
memory.Base = value.Register
defer f.FreeRegister(value.Register)
case eval.Label:
f.RegisterLabel(asm.MOVE, output, value.Label)
memory.Base = output
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, value.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, value))
}
f.MemoryRegister(asm.LOAD, memory, output)
f.FreeRegister(value.Register)
return nil
}

2
src/core/CompileMemoryStore.go
View File

@ -28,7 +28,7 @@ func (f *Function) CompileMemoryStore(root *expression.Expression) error {
defer f.UseVariable(variable)
memory := asm.Memory{
Base: variable.Register,
Base: variable.Value.Register,
OffsetRegister: math.MaxUint8,
Length: byte(numBytes),
}

3
src/core/Define.go
View File

@ -25,8 +25,7 @@ func (f *Function) Define(leaf *expression.Expression) (*scope.Variable, error)
variable = &scope.Variable{
Name: name,
Value: eval.Value{
Kind: eval.Register,
Value: eval.Register{
Register: f.NewRegister(),
Alive: uses,
},

4
src/core/DotToRegister.go
View File

@ -20,10 +20,10 @@ func (f *Function) DotToRegister(node *expression.Expression, register cpu.Regis
variable := f.VariableByName(leftText)
if variable != nil {
field := variable.Type.(*types.Pointer).To.(*types.Struct).FieldByName(rightText)
field := variable.Value.Typ.(*types.Pointer).To.(*types.Struct).FieldByName(rightText)
memory := asm.Memory{
Base: variable.Register,
Base: variable.Value.Register,
Offset: int8(field.Offset),
OffsetRegister: math.MaxUint8,
Length: byte(field.Type.Size()),

10
src/core/Evaluate.go
View File

@ -10,9 +10,8 @@ import (
// Evaluate evaluates an expression and returns a value.
func (f *Function) Evaluate(expr *expression.Expression) (eval.Value, error) {
if expr.IsFolded {
value := eval.Value{
Kind: eval.Number,
Type: types.AnyInt,
value := eval.Number{
Typ: types.AnyInt,
Number: expr.Value,
}
@ -37,9 +36,8 @@ func (f *Function) Evaluate(expr *expression.Expression) (eval.Value, error) {
tmp := f.NewRegister()
typ, err := f.ExpressionToRegister(expr, tmp)
value := eval.Value{
Kind: eval.Register,
Type: typ,
value := eval.Register{
Typ: typ,
Register: tmp,
}

19
src/core/EvaluateArray.go
View File

@ -17,13 +17,13 @@ func (f *Function) EvaluateArray(expr *expression.Expression) (eval.Value, error
array := f.VariableByName(name)
if array == nil {
return eval.Value{}, errors.New(&errors.UnknownIdentifier{Name: name}, f.File, expr.Children[0].Token.Position)
return nil, errors.New(&errors.UnknownIdentifier{Name: name}, f.File, expr.Children[0].Token.Position)
}
defer f.UseVariable(array)
memory := asm.Memory{
Base: array.Register,
Base: array.Value.Register,
Offset: 0,
OffsetRegister: math.MaxUint8,
Length: byte(1),
@ -33,26 +33,25 @@ func (f *Function) EvaluateArray(expr *expression.Expression) (eval.Value, error
index, err := f.Evaluate(indexExpr)
if err != nil {
return eval.Value{}, err
return nil, err
}
if !types.Is(index.Type, types.AnyInt) {
return eval.Value{}, errors.New(&errors.TypeMismatch{Encountered: index.Type.Name(), Expected: types.AnyInt.Name()}, f.File, indexExpr.Token.Position)
if !types.Is(index.Type(), types.AnyInt) {
return nil, errors.New(&errors.TypeMismatch{Encountered: index.Type().Name(), Expected: types.AnyInt.Name()}, f.File, indexExpr.Token.Position)
}
switch index.Kind {
switch index := index.(type) {
case eval.Number:
memory.Offset = int8(index.Number)
case eval.Register:
memory.OffsetRegister = index.Register
defer f.FreeRegister(index.Register)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, index.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, index))
}
value := eval.Value{
Kind: eval.Memory,
Type: array.Type.(*types.Array).Of,
value := eval.Memory{
Typ: array.Value.Typ.(*types.Array).Of,
Memory: memory,
}

9
src/core/EvaluateCall.go
View File

@ -11,16 +11,15 @@ func (f *Function) EvaluateCall(expr *expression.Expression) (eval.Value, error)
types, err := f.CompileCall(expr)
if err != nil {
return eval.Value{}, err
return nil, err
}
if len(types) == 0 {
return eval.Value{}, errors.New(errors.UntypedExpression, f.File, expr.Token.Position)
return nil, errors.New(errors.UntypedExpression, f.File, expr.Token.Position)
}
value := eval.Value{
Kind: eval.Register,
Type: types[0],
value := eval.Register{
Typ: types[0],
Register: f.CPU.Output[0],
}

23
src/core/EvaluateDot.go
View File

@ -20,13 +20,12 @@ func (f *Function) EvaluateDot(expr *expression.Expression) (eval.Value, error)
variable := f.VariableByName(leftText)
if variable != nil {
field := variable.Type.(*types.Pointer).To.(*types.Struct).FieldByName(rightText)
field := variable.Value.Typ.(*types.Pointer).To.(*types.Struct).FieldByName(rightText)
value := eval.Value{
Kind: eval.Memory,
Type: field.Type,
value := eval.Memory{
Typ: field.Type,
Memory: asm.Memory{
Base: variable.Register,
Base: variable.Value.Register,
Offset: int8(field.Offset),
OffsetRegister: math.MaxUint8,
Length: byte(field.Type.Size()),
@ -42,12 +41,11 @@ func (f *Function) EvaluateDot(expr *expression.Expression) (eval.Value, error)
number, err := ToNumber(constant.Token, constant.File)
if err != nil {
return eval.Value{}, err
return nil, err
}
value := eval.Value{
Kind: eval.Number,
Type: types.AnyInt,
value := eval.Number{
Typ: types.AnyInt,
Number: number,
}
@ -60,14 +58,13 @@ func (f *Function) EvaluateDot(expr *expression.Expression) (eval.Value, error)
if exists {
f.File.Imports[leftText].Used = true
value := eval.Value{
Kind: eval.Label,
Type: types.AnyPointer,
value := eval.Label{
Typ: types.AnyPointer,
Label: function.UniqueName,
}
return value, nil
}
return eval.Value{}, errors.New(&errors.UnknownIdentifier{Name: uniqueName}, f.File, left.Token.Position)
return nil, errors.New(&errors.UnknownIdentifier{Name: uniqueName}, f.File, left.Token.Position)
}

40
src/core/EvaluateLeaf.go
View File

@ -18,9 +18,8 @@ func (f *Function) EvaluateLeaf(expr *expression.Expression) (eval.Value, error)
name := expr.Token.Text(f.File.Bytes)
if name == "true" {
value := eval.Value{
Kind: eval.Number,
Type: types.Bool,
value := eval.Number{
Typ: types.Bool,
Number: 1,
}
@ -28,9 +27,8 @@ func (f *Function) EvaluateLeaf(expr *expression.Expression) (eval.Value, error)
}
if name == "false" {
value := eval.Value{
Kind: eval.Number,
Type: types.Bool,
value := eval.Number{
Typ: types.Bool,
Number: 0,
}
@ -42,16 +40,15 @@ func (f *Function) EvaluateLeaf(expr *expression.Expression) (eval.Value, error)
if variable != nil {
f.UseVariable(variable)
if variable.Alive == 0 {
if variable.Value.Alive == 0 {
return variable.Value, nil
}
tmp := f.NewRegister()
f.RegisterRegister(asm.MOVE, tmp, variable.Register)
f.RegisterRegister(asm.MOVE, tmp, variable.Value.Register)
value := eval.Value{
Kind: eval.Register,
Type: variable.Type,
value := eval.Register{
Typ: variable.Value.Typ,
Register: tmp,
}
@ -59,27 +56,25 @@ func (f *Function) EvaluateLeaf(expr *expression.Expression) (eval.Value, error)
}
if function != nil {
value := eval.Value{
Kind: eval.Label,
Type: types.AnyPointer,
value := eval.Label{
Typ: types.AnyPointer,
Label: function.UniqueName,
}
return value, nil
}
return eval.Value{}, errors.New(&errors.UnknownIdentifier{Name: name}, f.File, expr.Token.Position)
return nil, errors.New(&errors.UnknownIdentifier{Name: name}, f.File, expr.Token.Position)
case token.Number, token.Rune:
number, err := f.ToNumber(expr.Token)
if err != nil {
return eval.Value{}, err
return nil, err
}
value := eval.Value{
Kind: eval.Number,
Type: types.AnyInt,
value := eval.Number{
Typ: types.AnyInt,
Number: number,
}
@ -94,14 +89,13 @@ func (f *Function) EvaluateLeaf(expr *expression.Expression) (eval.Value, error)
copy(slice[8:], data)
label := f.AddBytes(slice)
value := eval.Value{
Kind: eval.Label,
Type: types.String,
value := eval.Label{
Typ: types.String,
Label: label,
}
return value, nil
}
return eval.Value{}, errors.New(errors.InvalidExpression, f.File, expr.Token.Position)
return nil, errors.New(errors.InvalidExpression, f.File, expr.Token.Position)
}

2
src/core/ExecuteLeaf.go
View File

@ -18,7 +18,7 @@ func (f *Function) ExecuteLeaf(operation token.Token, register cpu.Register, ope
}
defer f.UseVariable(variable)
return f.ExecuteRegisterRegister(operation, register, variable.Register)
return f.ExecuteRegisterRegister(operation, register, variable.Value.Register)
case token.Number, token.Rune:
number, err := f.ToNumber(operand)

6
src/core/ExpressionToMemory.go
View File

@ -17,7 +17,7 @@ func (f *Function) ExpressionToMemory(node *expression.Expression, memory asm.Me
return nil, err
}
switch value.Kind {
switch value := value.(type) {
case eval.Number:
f.MemoryNumber(asm.STORE, memory, value.Number)
case eval.Register:
@ -31,8 +31,8 @@ func (f *Function) ExpressionToMemory(node *expression.Expression, memory asm.Me
case eval.Label:
f.MemoryLabel(asm.STORE, memory, value.Label)
default:
panic(fmt.Errorf("%s: not implemented: %d", f.UniqueName, value.Kind))
panic(fmt.Errorf("%s: not implemented: %v", f.UniqueName, value))
}
return value.Type, err
return value.Type(), err
}

2
src/core/ExpressionToRegister.go
View File

@ -71,7 +71,7 @@ func (f *Function) ExpressionToRegister(node *expression.Expression, register cp
} else if right.Token.Kind == token.Identifier {
rightVariable := f.VariableByName(right.Token.Text(f.File.Bytes))
leftPointer, leftIsPointer := typ.(*types.Pointer)
rightPointer, rightIsPointer := rightVariable.Type.(*types.Pointer)
rightPointer, rightIsPointer := rightVariable.Value.Typ.(*types.Pointer)
if leftIsPointer && rightIsPointer && leftPointer.To == rightPointer.To {
typ = types.Int

2
src/core/MultiAssign.go
View File

@ -23,7 +23,7 @@ func (f *Function) MultiAssign(left *expression.Expression, right *expression.Ex
return errors.New(&errors.UnknownIdentifier{Name: name}, f.File, left.Token.Position)
}
f.RegisterRegister(asm.MOVE, variable.Register, f.CPU.Output[count])
f.RegisterRegister(asm.MOVE, variable.Value.Register, f.CPU.Output[count])
f.UseVariable(variable)
count++
return nil

5
src/core/ResolveTypes.go
View File

@ -32,9 +32,8 @@ func (f *Function) ResolveTypes() error {
f.AddVariable(&scope.Variable{
Name: param.name,
Value: eval.Value{
Kind: eval.Register,
Type: param.typ,
Value: eval.Register{
Typ: param.typ,
Register: x86.InputRegisters[i],
Alive: uses,
},

4
src/core/TokenToRegister.go
View File

@ -32,8 +32,8 @@ func (f *Function) TokenToRegister(t token.Token, register cpu.Register) (types.
if variable != nil {
f.UseVariable(variable)
f.SaveRegister(register)
f.RegisterRegister(asm.MOVE, register, variable.Register)
return variable.Type, nil
f.RegisterRegister(asm.MOVE, register, variable.Value.Register)
return variable.Value.Typ, nil
}
if function != nil {

2
src/core/UsesRegister.go
View File

@ -16,7 +16,7 @@ func (f *Function) UsesRegister(expr *expression.Expression, register cpu.Regist
variable := f.VariableByName(expr.Token.Text(f.File.Bytes))
if variable == nil || variable.Register != register {
if variable == nil || variable.Value.Register != register {
return false
}

11
src/eval/Kind.go
View File

@ -1,11 +0,0 @@
package eval
type Kind uint8
const (
Invalid Kind = iota // Invalid is an invalid value.
Number // Number is an immediately encoded value stored together with the instruction.
Register // Register is a CPU register.
Memory // Memory is an area in the RAM.
Label // Label is a reference to a name that can only be resolved once the program is fully compiled.
)

17
src/eval/Label.go Normal file
View File

@ -0,0 +1,17 @@
package eval
import "git.urbach.dev/cli/q/src/types"
// Label is a named pointer to a code or data section.
type Label struct {
Typ types.Type
Label string
}
func (v Label) String() string {
return "Label"
}
func (v Label) Type() types.Type {
return v.Typ
}

20
src/eval/Memory.go Normal file
View File

@ -0,0 +1,20 @@
package eval
import (
"git.urbach.dev/cli/q/src/asm"
"git.urbach.dev/cli/q/src/types"
)
// Memory is a region in memory that can be addressed by an instruction.
type Memory struct {
Typ types.Type
Memory asm.Memory
}
func (v Memory) String() string {
return "Memory"
}
func (v Memory) Type() types.Type {
return v.Typ
}

17
src/eval/Number.go Normal file
View File

@ -0,0 +1,17 @@
package eval
import "git.urbach.dev/cli/q/src/types"
// Number is an immediate value that is stored next to the instruction.
type Number struct {
Typ types.Type
Number int
}
func (v Number) String() string {
return "Number"
}
func (v Number) Type() types.Type {
return v.Typ
}

21
src/eval/Register.go Normal file
View File

@ -0,0 +1,21 @@
package eval
import (
"git.urbach.dev/cli/q/src/cpu"
"git.urbach.dev/cli/q/src/types"
)
// Register is a value that is stored inside a CPU register.
type Register struct {
Typ types.Type
Alive uint8
Register cpu.Register
}
func (v Register) String() string {
return "Register"
}
func (v Register) Type() types.Type {
return v.Typ
}

21
src/eval/Value.go
View File

@ -1,29 +1,22 @@
package eval
import (
"git.urbach.dev/cli/q/src/asm"
"git.urbach.dev/cli/q/src/cpu"
"git.urbach.dev/cli/q/src/types"
)
// Value combines a register with its data type.
type Value struct {
Type types.Type
Label string
Number int
Memory asm.Memory
Register cpu.Register
Alive uint8
Kind Kind
// Value abstracts all data storage types like immediates, registers and memory.
type Value interface {
String() string
Type() types.Type
}
// IsAlive returns true if the Value is still alive.
func (v *Value) IsAlive() bool {
// IsAlive returns true if the register value is still alive.
func (v *Register) IsAlive() bool {
return v.Alive > 0
}
// Use reduces the lifetime counter by one.
func (v *Value) Use() {
func (v *Register) Use() {
if v.Alive == 0 {
panic("incorrect number of value use calls")
}

4
src/register/SaveRegister.go
View File

@ -19,12 +19,12 @@ func (f *Machine) SaveRegister(register cpu.Register) {
variable := f.VariableByRegister(register)
if variable == nil || variable.Alive == 0 {
if variable == nil || variable.Value.Alive == 0 {
return
}
newRegister := f.NewRegister()
f.RegisterRegister(asm.MOVE, newRegister, register)
variable.Register = newRegister
variable.Value.Register = newRegister
f.FreeRegister(register)
}

2
src/scope/Scope.go
View File

@ -15,7 +15,7 @@ type Scope struct {
// AddVariable adds a new variable to the current scope.
func (s *Scope) AddVariable(variable *Variable) {
s.Variables = append(s.Variables, variable)
s.Use(variable.Register)
s.Use(variable.Value.Register)
}
// VariableByName returns the variable with the given name or `nil` if it doesn't exist.

15
src/scope/Stack.go
View File

@ -46,11 +46,10 @@ func (stack *Stack) PushScope(body ast.AST, buffer []byte) *Scope {
s.Variables = append(s.Variables, &Variable{
Name: v.Name,
Value: eval.Value{
Kind: eval.Register,
Register: v.Register,
Value: eval.Register{
Typ: v.Value.Typ,
Alive: count,
Type: v.Type,
Register: v.Value.Register,
},
})
}
@ -73,10 +72,10 @@ func (stack *Stack) UseVariable(variable *Variable) {
continue
}
local.Use()
local.Value.Use()
if !local.IsAlive() {
scope.Free(local.Register)
if !local.Value.IsAlive() {
scope.Free(local.Value.Register)
}
}
}
@ -89,7 +88,7 @@ func (stack *Stack) VariableByName(name string) *Variable {
// VariableByRegister returns the variable that occupies the given register or `nil` if none occupy the register.
func (stack *Stack) VariableByRegister(register cpu.Register) *Variable {
for _, v := range stack.CurrentScope().Variables {
if v.Register == register {
if v.Value.Register == register {
return v
}
}

2
src/scope/Variable.go
View File

@ -5,5 +5,5 @@ import "git.urbach.dev/cli/q/src/eval"
// Variable is a named value.
type Variable struct {
Name string
eval.Value
Value eval.Register
}