ctors: include implicit inputs/outputs

internal/gen/avotypes.go

@@ -0,0 +1,23 @@
+package gen
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	pkg         = "github.com/mmcloughlin/avo"
+	instType    = "avo.Instruction"
+	operandType = "operand.Op"
+)
+
+// implicitRegister returns avo syntax for the given implicit register type (from Opcodes XML).
+func implicitRegister(t string) string {
+	r := strings.Replace(t, "mm", "", 1) // handles the "xmm0" type
+	return fmt.Sprintf("reg.%s", strings.ToUpper(r))
+}
+
+// checkername returns the name of the function that checks an operand of type t.
+func checkername(t string) string {
+	return "operand.Is" + strings.Title(t)
+}