really basic instruction generator

x86/make.go

@@ -0,0 +1,74 @@
+// +build ignore
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"go/build"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+	"sort"
+
+	"golang.org/x/arch/x86/x86csv"
+)
+
+const csvname = "x86.v0.2.csv"
+
+var csvpath = flag.String(
+	"csv",
+	filepath.Join(build.Default.GOPATH, "src/golang.org/x/arch/x86", csvname),
+	"path to "+csvname,
+)
+
+func UniqueOpCodes(instrs []*x86csv.Inst) []string {
+	set := map[string]bool{}
+	for _, i := range instrs {
+		set[i.GoOpcode()] = true
+	}
+
+	opcodes := make([]string, 0, len(set))
+	for opcode := range set {
+		opcodes = append(opcodes, opcode)
+	}
+
+	sort.Strings(opcodes)
+
+	return opcodes
+}
+
+var functionRegex = regexp.MustCompile(`^[A-Z0-9]+$`)
+
+func main() {
+	flag.Parse()
+
+	f, err := os.Open(*csvpath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	r := x86csv.NewReader(f)
+
+	instrs, err := r.ReadAll()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Print("package x86\n\nimport \"github.com/mmcloughlin/avo\"\n")
+
+	for _, opcode := range UniqueOpCodes(instrs) {
+		if !functionRegex.MatchString(opcode) {
+			log.Printf("skip %s", opcode)
+			continue
+		}
+		fmt.Printf("\nfunc %s(f *avo.Function, operands ...string) {\n", opcode)
+		fmt.Printf("\tf.AddInstruction(avo.Instruction{\n")
+		fmt.Printf("\t\tMnemonic: \"%s\",\n", opcode)
+		fmt.Printf("\t\tOperands: operands,\n")
+		fmt.Printf("\t})\n")
+		fmt.Printf("}\n")
+	}
+}