1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2  * vim: set ts=8 sts=4 et sw=4 tw=99:
3  *
4  * Copyright 2016 Mozilla Foundation
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 
19 #ifndef asmjs_wasm_baseline_compile_h
20 #define asmjs_wasm_baseline_compile_h
21 
22 #include "wasm/WasmGenerator.h"
23 
24 namespace js {
25 namespace wasm {
26 
27 // Return whether BaselineCompileFunction can generate code on the current
28 // device. Note: asm.js is also currently not supported due to Atomics and SIMD.
29 bool BaselineCanCompile();
30 
31 // Generate adequate code quickly.
32 MOZ_MUST_USE bool BaselineCompileFunctions(const ModuleEnvironment& env,
33                                            LifoAlloc& lifo,
34                                            const FuncCompileInputVector& inputs,
35                                            CompiledCode* code,
36                                            UniqueChars* error);
37 
38 class BaseLocalIter {
39  private:
40   using ConstValTypeRange = mozilla::Range<const ValType>;
41 
42   const ValTypeVector& locals_;
43   size_t argsLength_;
44   ConstValTypeRange argsRange_;  // range struct cache for ABIArgIter
45   jit::ABIArgIter<ConstValTypeRange> argsIter_;
46   size_t index_;
47   int32_t localSize_;
48   int32_t reservedSize_;
49   int32_t frameOffset_;
50   jit::MIRType mirType_;
51   bool done_;
52 
53   void settle();
54   int32_t pushLocal(size_t nbytes);
55 
56  public:
57   BaseLocalIter(const ValTypeVector& locals, size_t argsLength,
58                 bool debugEnabled);
59   void operator++(int);
done()60   bool done() const { return done_; }
61 
mirType()62   jit::MIRType mirType() const {
63     MOZ_ASSERT(!done_);
64     return mirType_;
65   }
frameOffset()66   int32_t frameOffset() const {
67     MOZ_ASSERT(!done_);
68     return frameOffset_;
69   }
index()70   size_t index() const {
71     MOZ_ASSERT(!done_);
72     return index_;
73   }
currentLocalSize()74   int32_t currentLocalSize() const { return localSize_; }
reservedSize()75   int32_t reservedSize() const { return reservedSize_; }
76 
77 #ifdef DEBUG
isArg()78   bool isArg() const {
79     MOZ_ASSERT(!done_);
80     return !argsIter_.done();
81   }
82 #endif
83 };
84 
85 }  // namespace wasm
86 }  // namespace js
87 
88 #endif  // asmjs_wasm_baseline_compile_h
89