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//go:build ignore
// +build ignore
package main
import (
"bytes"
"flag"
"fmt"
"io"
"log"
"math/rand"
"os"
"path/filepath"
"runtime"
"github.com/mmcloughlin/avo/attr"
)
var (
output = flag.String("output", "", "path to output file (default stdout)")
seed = flag.Int64("seed", 0, "random seed")
num = flag.Int("num", 32, "number of attributes to generate")
)
func GenerateAttributes(n int) []attr.Attribute {
as := make([]attr.Attribute, 0, n)
// Include each bitlevel.
for i := 0; i < 16 && i < n; i++ {
a := attr.Attribute(1 << uint(i))
as = append(as, a)
}
// Add randomly generated attributes.
for len(as) < n {
a := attr.Attribute(rand.Uint32())
as = append(as, a)
}
return as
}
func PrintAttributesTest(w io.Writer, as []attr.Attribute) {
_, self, _, _ := runtime.Caller(0)
fmt.Fprintf(w, "// Code generated by %s. DO NOT EDIT.\n\n", filepath.Base(self))
fmt.Fprintf(w, "#include \"textflag.h\"\n\n")
fmt.Fprintf(w, "TEXT ·attrtest(SB), $0-1\n")
fmt.Fprintf(w, "\tMOVB $0, ret+0(FP)\n")
for i, a := range as {
fmt.Fprintf(w, "\tMOVW $(%d), R8\n", a)
fmt.Fprintf(w, "\tMOVW $(%s), R9\n", a.Asm())
fmt.Fprintf(w, "\tCMPW R8, R9\n")
cont := fmt.Sprintf("cont%d", i)
fmt.Fprintf(w, "\tJE %s\n", cont)
fmt.Fprintf(w, "\tRET\n")
fmt.Fprintf(w, "\n%s:\n", cont)
}
fmt.Fprintf(w, "\tMOVB $1, ret+0(FP)\n")
fmt.Fprintf(w, "\tRET\n")
}
func main() {
flag.Parse()
w := os.Stdout
if *output != "" {
f, err := os.Create(*output)
if err != nil {
log.Fatal(err)
}
defer f.Close()
w = f
}
rand.Seed(*seed)
as := GenerateAttributes(*num)
buf := bytes.NewBuffer(nil)
PrintAttributesTest(buf, as)
if _, err := w.Write(buf.Bytes()); err != nil {
log.Fatal(err)
}
}
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