reorganize things into different packages

vm/compiler/featureset_macros.go

@@ -0,0 +1,29 @@
+package compiler
+
+import "github.com/vsariola/sointu/vm"
+
+type FeatureSetMacros struct {
+	vm.FeatureSet
+}
+
+func (p *FeatureSetMacros) HasOp(instruction string) bool {
+	_, ok := p.Opcode(instruction)
+	return ok
+}
+
+func (p *FeatureSetMacros) GetOp(instruction string) int {
+	v, _ := p.Opcode(instruction)
+	return v
+}
+
+func (p *FeatureSetMacros) Stereo(unitType string) bool {
+	return p.SupportsParamValue(unitType, "stereo", 1)
+}
+
+func (p *FeatureSetMacros) Mono(unitType string) bool {
+	return p.SupportsParamValue(unitType, "stereo", 0)
+}
+
+func (p *FeatureSetMacros) StereoAndMono(unitType string) bool {
+	return p.Stereo(unitType) && p.Mono(unitType)
+}