Simplified file structure

src/register/RegisterNumber.go

@@ -0,0 +1,33 @@
+package register
+
+import (
+	"git.akyoto.dev/cli/q/src/asm"
+	"git.akyoto.dev/cli/q/src/cpu"
+	"git.akyoto.dev/cli/q/src/sizeof"
+)
+
+func (f *Machine) RegisterNumber(mnemonic asm.Mnemonic, a cpu.Register, b int) {
+	// The `MOVE` operation is very flexible and works with any type of immediate number.
+	if mnemonic == asm.MOVE {
+		f.Assembler.RegisterNumber(mnemonic, a, b)
+		f.UseRegister(a)
+		f.postInstruction()
+		return
+	}
+
+	// If the number only needs 32 bits, we can encode the instruction.
+	if sizeof.Signed(int64(b)) <= 4 {
+		f.Assembler.RegisterNumber(mnemonic, a, b)
+		f.postInstruction()
+		return
+	}
+
+	// If the number needs 64 bits, we need to use a temporary register.
+	tmp := f.NewRegister()
+	f.Assembler.RegisterNumber(asm.MOVE, tmp, b)
+	f.UseRegister(tmp)
+	f.postInstruction()
+	f.Assembler.RegisterRegister(mnemonic, a, tmp)
+	f.postInstruction()
+	f.FreeRegister(tmp)
+}