func sysVClassifyType(typ types.Type) []sysVParameterClass {
switch typ := typ.(type) {
case *types.Struct:
return sysVClassifyStructType(typ)
case *types.Array:
return sysVClassifyArrayType(typ)
case *types.Int:
switch typ.Width() {
case 1, 8, 16, 32, 64, 128:
return []sysVParameterClass{sysVClassINTEGER}
default:
panic("unim")
}
case *types.Pointer:
return []sysVParameterClass{sysVClassINTEGER}
case *types.Float:
switch typ.Type() {
case types.Float32, types.Float64:
return []sysVParameterClass{sysVClassSSE}
default:
panic("unim")
}
case types.Void:
return []sysVParameterClass{sysVClassNO_CLASS}
default:
panic("amd64.classifyType: unim: " + reflect.TypeOf(typ).String())
}
}
func TypeSizeInBits(typ types.Type) int {
switch typ := typ.(type) {
case *types.Int:
w := typ.Width()
for w%8 != 0 {
w++
}
return w
case *types.Float:
return typ.Type().Width()
case *types.Pointer:
return 64
case *types.Array:
return TypeSizeInBits(typ.Element()) * typ.Length()
case *types.Struct:
return newStructLayout(typ).size
default:
panic("unim")
}
}
func checkTypeSupported(typ types.Type) {
switch typ := typ.(type) {
case *types.Int:
switch typ.Width() {
case 1, 8, 16, 32, 64:
// all good
default:
goto unsupported
}
case *types.Array:
checkTypeSupported(typ.Element())
case *types.Struct:
for _, field := range typ.Fields() {
checkTypeSupported(field)
}
}
return
unsupported:
panic(fmt.Sprintf("unsupported type: %s", typ))
}