Improved separation of concerns

src/build/z/isDestructive.go

@@ -0,0 +1,12 @@
+package z
+
+import "git.akyoto.dev/cli/q/src/build/asm"
+
+func isDestructive(mnemonic asm.Mnemonic) bool {
+	switch mnemonic {
+	case asm.MOVE, asm.ADD, asm.SUB, asm.MUL, asm.DIV:
+		return true
+	default:
+		return false
+	}
+}