141 lines
3.8 KiB
Go
141 lines
3.8 KiB
Go
package generator
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import "fmt"
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import "errors"
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import "git.tebibyte.media/sashakoshka/fspl/llvm"
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import "git.tebibyte.media/sashakoshka/fspl/entity"
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// type pointer struct { TypeName string }
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// func (this *pointer) Name () string { return this.TypeName }
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// func (this *pointer) SetName (name string) { this.TypeName = name }
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// func (*pointer) LLString () string { return "ptr" }
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// func (this *pointer) String () string {
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// if this.TypeName == "" {
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// return this.LLString()
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// } else {
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// return "%" + this.TypeName
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// }
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// }
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// func (*pointer) Equal (ty llvm.Type) bool {
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// _, isGenericPointer := ty.(*pointer)
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// _, isTypedPointer := ty.(*types.PointerType)
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// return isGenericPointer || isTypedPointer
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// }
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func (this *generator) generateTypeNamed (ty *entity.TypeNamed) (llvm.Type, error) {
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return this.typedef(ty.Name)
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}
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func (this *generator) generateTypePointer (ty *entity.TypePointer) (llvm.Type, error) {
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return llvm.Pointer, nil
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}
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func (this *generator) generateTypeSlice (ty *entity.TypeSlice) (llvm.Type, error) {
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return &llvm.TypeStruct {
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Fields: []llvm.Type {
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/* data */ llvm.Pointer,
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/* len */ &llvm.TypeInt {
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BitSize: this.target.WordSize,
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},
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},
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}, nil
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}
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func (this *generator) generateTypeArray (ty *entity.TypeArray) (llvm.Type, error) {
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element, err := this.generateType(ty.Element)
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if err != nil { return nil, err }
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return &llvm.TypeArray {
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Length: uint64(ty.Length),
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Element: element,
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}, nil
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}
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func (this *generator) generateTypeStruct (ty *entity.TypeStruct) (llvm.Type, error) {
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irStruct := &llvm.TypeStruct {
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Fields: make([]llvm.Type, len(ty.Members)),
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}
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for index, member := range ty.Members {
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field, err := this.generateType(member.Type())
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if err != nil { return nil, err }
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irStruct.Fields[index] = field
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}
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return irStruct, nil
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}
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func (this *generator) generateTypeInerface (ty *entity.TypeInterface) (llvm.Type, error) {
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irStruct := &llvm.TypeStruct {
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Fields: make([]llvm.Type, len(ty.Behaviors) + 1),
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}
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// object pointer
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irStruct.Fields[0] = llvm.Pointer
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// behaviors
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for index := range ty.Behaviors {
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irStruct.Fields[index + 1] = llvm.Pointer
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}
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return irStruct, nil
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}
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func (this *generator) generateTypeInt (ty *entity.TypeInt) (llvm.Type, error) {
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return &llvm.TypeInt { BitSize: uint64(ty.Width) }, nil
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}
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func (this *generator) generateTypeFloat (ty *entity.TypeFloat) (llvm.Type, error) {
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var kind llvm.FloatKind; switch ty.Width {
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case 16: kind = llvm.FloatKindHalf
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case 32: kind = llvm.FloatKindFloat
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case 64: kind = llvm.FloatKindDouble
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case 80:
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if this.target.Arch == "x86" {
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kind = llvm.FloatKindX86_FP80
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} else {
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return nil, errors.New(fmt.Sprintln (
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ty, "not available on",
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this.target.Arch))
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}
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case 128:
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if this.target.Arch == "PowerPC" {
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kind = llvm.FloatKindPPC_FP128
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} else {
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kind = llvm.FloatKindFP128
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}
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default:
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return nil, errors.New(fmt.Sprintln (ty, "has invalid width"))
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}
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return &llvm.TypeFloat { Kind: kind }, nil
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}
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func (this *generator) generateTypeWord (ty *entity.TypeWord) (llvm.Type, error) {
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return &llvm.TypeInt { BitSize: this.target.WordSize }, nil
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}
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func (this *generator) generateTypeFunction (
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signature *entity.Signature,
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) (
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llvm.Type,
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error,
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) {
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irFunc := &llvm.TypeFunction {
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Parameters: make([]llvm.Type, len(signature.Arguments)),
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}
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ret, err := this.generateType(signature.Return)
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if err != nil { return nil, err }
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irFunc.Return = ret
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for index, argument := range signature.Arguments {
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param, err := this.generateType(argument.Type())
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if err != nil { return nil, err }
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irFunc.Parameters[index] = param
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}
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return irFunc, nil
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}
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func getInterface (ty entity.Type) *entity.TypeInterface {
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switch ty.(type) {
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case *entity.TypeNamed:
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return getInterface(ty.(*entity.TypeNamed).Type)
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case *entity.TypeInterface:
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return ty.(*entity.TypeInterface)
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default:
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return nil
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}
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}
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