Reorganized file structure

src/build/asm/Instruction.go

@@ -0,0 +1,19 @@
+package asm
+
+import "fmt"
+
+// Instruction represents a single instruction which can be converted to machine code.
+type Instruction struct {
+	Mnemonic Mnemonic
+	Data     interface{}
+}
+
+// String returns a human readable version.
+func (x *Instruction) String() string {
+	switch data := x.Data.(type) {
+	case RegisterNumber:
+		return fmt.Sprintf("%s %s, %x", x.Mnemonic, data.Register, data.Number)
+	default:
+		return x.Mnemonic.String()
+	}
+}