blob: a0639e8deb8ae4e946e1e35a330aea03eee7a895 (
plain)
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
|
// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_CODE_H_
#define V8_CODE_H_
#include "src/allocation.h"
#include "src/handles.h"
#include "src/objects.h"
namespace v8 {
namespace internal {
// Wrapper class for passing expected and actual parameter counts as
// either registers or immediate values. Used to make sure that the
// caller provides exactly the expected number of parameters to the
// callee.
class ParameterCount BASE_EMBEDDED {
public:
explicit ParameterCount(Register reg)
: reg_(reg), immediate_(0) { }
explicit ParameterCount(int immediate)
: reg_(no_reg), immediate_(immediate) { }
explicit ParameterCount(Handle<JSFunction> f)
: reg_(no_reg),
immediate_(f->shared()->internal_formal_parameter_count()) {}
bool is_reg() const { return !reg_.is(no_reg); }
bool is_immediate() const { return !is_reg(); }
Register reg() const {
DCHECK(is_reg());
return reg_;
}
int immediate() const {
DCHECK(is_immediate());
return immediate_;
}
private:
const Register reg_;
const int immediate_;
DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount);
};
} } // namespace v8::internal
#endif // V8_CODE_H_
|
