Improved code generation

src/build/core/Instructions.go

@@ -0,0 +1,98 @@
+package core
+
+import (
+	"git.akyoto.dev/cli/q/src/build/asm"
+	"git.akyoto.dev/cli/q/src/build/config"
+	"git.akyoto.dev/cli/q/src/build/cpu"
+)
+
+func (f *Function) AddLabel(label string) {
+	f.assembler.Label(asm.LABEL, label)
+	f.postInstruction()
+}
+
+func (f *Function) Call(label string) {
+	f.assembler.Call(label)
+	f.cpu.Use(f.cpu.Output[0])
+	f.postInstruction()
+}
+
+func (f *Function) Comment(comment string) {
+	f.assembler.Comment(comment)
+	f.postInstruction()
+}
+
+func (f *Function) Jump(mnemonic asm.Mnemonic, label string) {
+	f.assembler.Label(mnemonic, label)
+	f.postInstruction()
+}
+
+func (f *Function) Register(mnemonic asm.Mnemonic, a cpu.Register) {
+	f.assembler.Register(mnemonic, a)
+
+	if mnemonic == asm.POP {
+		f.cpu.Use(a)
+	}
+
+	f.postInstruction()
+}
+
+func (f *Function) RegisterNumber(mnemonic asm.Mnemonic, a cpu.Register, b int) {
+	if f.cpu.IsUsed(a) && isDestructive(mnemonic) {
+		f.SaveRegister(a)
+	}
+
+	f.assembler.RegisterNumber(mnemonic, a, b)
+
+	if mnemonic == asm.MOVE {
+		f.cpu.Use(a)
+	}
+
+	f.postInstruction()
+}
+
+func (f *Function) RegisterRegister(mnemonic asm.Mnemonic, a cpu.Register, b cpu.Register) {
+	if mnemonic == asm.MOVE && a == b {
+		return
+	}
+
+	if f.cpu.IsUsed(a) && isDestructive(mnemonic) {
+		f.SaveRegister(a)
+	}
+
+	f.assembler.RegisterRegister(mnemonic, a, b)
+
+	if mnemonic == asm.MOVE {
+		f.cpu.Use(a)
+	}
+
+	f.postInstruction()
+}
+
+func (f *Function) Return() {
+	f.assembler.Return()
+	f.postInstruction()
+}
+
+func (f *Function) Syscall() {
+	f.assembler.Syscall()
+	f.cpu.Use(f.cpu.Output[0])
+	f.postInstruction()
+}
+
+func (f *Function) postInstruction() {
+	if !config.Assembler {
+		return
+	}
+
+	f.registerHistory = append(f.registerHistory, f.cpu.Used)
+}
+
+func isDestructive(mnemonic asm.Mnemonic) bool {
+	switch mnemonic {
+	case asm.MOVE, asm.ADD, asm.SUB, asm.MUL, asm.DIV:
+		return true
+	default:
+		return false
+	}
+}