File size: 3,513 Bytes
04dc9f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | // Copyright 2025 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Run all SIMD-related code generators.
package main
import (
"flag"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
)
const defaultXedPath = "$XEDPATH" + string(filepath.ListSeparator) + "./simdgen/xeddata" + string(filepath.ListSeparator) + "$HOME/xed/obj/dgen"
var (
flagTmplgen = flag.Bool("tmplgen", true, "run tmplgen generator")
flagSimdgen = flag.Bool("simdgen", true, "run simdgen generator")
flagN = flag.Bool("n", false, "dry run")
flagXedPath = flag.String("xedPath", defaultXedPath, "load XED datafile from `path`, which must be the XED obj/dgen directory")
)
var goRoot string
func main() {
flag.Parse()
if flag.NArg() > 0 {
flag.Usage()
os.Exit(1)
}
if *flagXedPath == defaultXedPath {
// In general we want the shell to do variable expansion, but for the
// default value we don't get that, so do it ourselves.
*flagXedPath = os.ExpandEnv(defaultXedPath)
}
var err error
goRoot, err = resolveGOROOT()
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
if *flagTmplgen {
doTmplgen()
}
if *flagSimdgen {
doSimdgen()
}
}
func doTmplgen() {
goRun("-C", "tmplgen", ".")
}
func doSimdgen() {
xedPath, err := resolveXEDPath(*flagXedPath)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
// Regenerate the XED-derived SIMD files
goRun("-C", "simdgen", ".", "-o", "godefs", "-goroot", goRoot, "-xedPath", prettyPath("./simdgen", xedPath), "go.yaml", "types.yaml", "categories.yaml")
// simdgen produces SSA rule files, so update the SSA files
goRun("-C", prettyPath(".", filepath.Join(goRoot, "src", "cmd", "compile", "internal", "ssa", "_gen")), ".")
}
func resolveXEDPath(pathList string) (xedPath string, err error) {
for _, path := range filepath.SplitList(pathList) {
if path == "" {
// Probably an unknown shell variable. Ignore.
continue
}
if _, err := os.Stat(filepath.Join(path, "all-dec-instructions.txt")); err == nil {
return filepath.Abs(path)
}
}
return "", fmt.Errorf("set $XEDPATH or -xedPath to the XED obj/dgen directory")
}
func resolveGOROOT() (goRoot string, err error) {
cmd := exec.Command("go", "env", "GOROOT")
cmd.Stderr = os.Stderr
out, err := cmd.Output()
if err != nil {
return "", fmt.Errorf("%s: %s", cmd, err)
}
goRoot = strings.TrimSuffix(string(out), "\n")
return goRoot, nil
}
func goRun(args ...string) {
exe := filepath.Join(goRoot, "bin", "go")
cmd := exec.Command(exe, append([]string{"run"}, args...)...)
run(cmd)
}
func run(cmd *exec.Cmd) {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
fmt.Fprintf(os.Stderr, "%s\n", cmdString(cmd))
if *flagN {
return
}
if err := cmd.Run(); err != nil {
fmt.Fprintf(os.Stderr, "%s failed: %s\n", cmd, err)
}
}
func prettyPath(base, path string) string {
base, err := filepath.Abs(base)
if err != nil {
return path
}
p, err := filepath.Rel(base, path)
if err != nil {
return path
}
return p
}
func cmdString(cmd *exec.Cmd) string {
// TODO: Shell quoting?
// TODO: Environment.
var buf strings.Builder
cmdPath, err := exec.LookPath(filepath.Base(cmd.Path))
if err == nil && cmdPath == cmd.Path {
cmdPath = filepath.Base(cmdPath)
} else {
cmdPath = prettyPath(".", cmd.Path)
}
buf.WriteString(cmdPath)
for _, arg := range cmd.Args[1:] {
buf.WriteByte(' ')
buf.WriteString(arg)
}
return buf.String()
}
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