1// Copyright 2009 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package gc
6
7import (
8	"fmt"
9	"go/constant"
10
11	"cmd/compile/internal/base"
12	"cmd/compile/internal/ir"
13	"cmd/compile/internal/typecheck"
14	"cmd/compile/internal/types"
15	"cmd/internal/bio"
16)
17
18func dumpasmhdr() {
19	b, err := bio.Create(base.Flag.AsmHdr)
20	if err != nil {
21		base.Fatalf("%v", err)
22	}
23	fmt.Fprintf(b, "// generated by compile -asmhdr from package %s\n\n", types.LocalPkg.Name)
24	for _, n := range typecheck.Target.AsmHdrDecls {
25		if n.Sym().IsBlank() {
26			continue
27		}
28		switch n.Op() {
29		case ir.OLITERAL:
30			t := n.Val().Kind()
31			if t == constant.Float || t == constant.Complex {
32				break
33			}
34			fmt.Fprintf(b, "#define const_%s %v\n", n.Sym().Name, n.Val().ExactString())
35
36		case ir.OTYPE:
37			t := n.Type()
38			if !t.IsStruct() || t.StructType().Map != nil || t.IsFuncArgStruct() {
39				break
40			}
41			fmt.Fprintf(b, "#define %s__size %d\n", n.Sym().Name, int(t.Size()))
42			for _, f := range t.Fields() {
43				if !f.Sym.IsBlank() {
44					fmt.Fprintf(b, "#define %s_%s %d\n", n.Sym().Name, f.Sym.Name, int(f.Offset))
45				}
46			}
47		}
48	}
49
50	b.Close()
51}
52