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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_ARCH_ARM) | 6 #if defined(TARGET_ARCH_ARM) |
7 | 7 |
8 #include "vm/runtime_entry.h" | 8 #include "vm/runtime_entry.h" |
9 | 9 |
10 #include "vm/assembler.h" | 10 #include "vm/assembler.h" |
11 #include "vm/simulator.h" | 11 #include "vm/simulator.h" |
12 #include "vm/stub_code.h" | 12 #include "vm/stub_code.h" |
13 | 13 |
14 namespace dart { | 14 namespace dart { |
15 | 15 |
16 #define __ assembler-> | 16 #define __ assembler-> |
17 | 17 |
18 | |
19 uword RuntimeEntry::GetEntryPoint() const { | 18 uword RuntimeEntry::GetEntryPoint() const { |
20 // Compute the effective address. When running under the simulator, | 19 // Compute the effective address. When running under the simulator, |
21 // this is a redirection address that forces the simulator to call | 20 // this is a redirection address that forces the simulator to call |
22 // into the runtime system. | 21 // into the runtime system. |
23 uword entry = reinterpret_cast<uword>(function()); | 22 uword entry = reinterpret_cast<uword>(function()); |
24 #if defined(USING_SIMULATOR) | 23 #if defined(USING_SIMULATOR) |
25 // Redirection to leaf runtime calls supports a maximum of 4 arguments passed | 24 // Redirection to leaf runtime calls supports a maximum of 4 arguments passed |
26 // in registers (maximum 2 double arguments for leaf float runtime calls). | 25 // in registers (maximum 2 double arguments for leaf float runtime calls). |
27 ASSERT(argument_count() >= 0); | 26 ASSERT(argument_count() >= 0); |
28 ASSERT(!is_leaf() || (!is_float() && (argument_count() <= 4)) || | 27 ASSERT(!is_leaf() || (!is_float() && (argument_count() <= 4)) || |
29 (argument_count() <= 2)); | 28 (argument_count() <= 2)); |
30 Simulator::CallKind call_kind = | 29 Simulator::CallKind call_kind = |
31 is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall | 30 is_leaf() ? (is_float() ? Simulator::kLeafFloatRuntimeCall |
32 : Simulator::kLeafRuntimeCall) | 31 : Simulator::kLeafRuntimeCall) |
33 : Simulator::kRuntimeCall; | 32 : Simulator::kRuntimeCall; |
34 entry = | 33 entry = |
35 Simulator::RedirectExternalReference(entry, call_kind, argument_count()); | 34 Simulator::RedirectExternalReference(entry, call_kind, argument_count()); |
36 #endif | 35 #endif |
37 return entry; | 36 return entry; |
38 } | 37 } |
39 | 38 |
40 | |
41 // Generate code to call into the stub which will call the runtime | 39 // Generate code to call into the stub which will call the runtime |
42 // function. Input for the stub is as follows: | 40 // function. Input for the stub is as follows: |
43 // SP : points to the arguments and return value array. | 41 // SP : points to the arguments and return value array. |
44 // R9 : address of the runtime function to call. | 42 // R9 : address of the runtime function to call. |
45 // R4 : number of arguments to the call. | 43 // R4 : number of arguments to the call. |
46 void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const { | 44 void RuntimeEntry::Call(Assembler* assembler, intptr_t argument_count) const { |
47 if (is_leaf()) { | 45 if (is_leaf()) { |
48 ASSERT(argument_count == this->argument_count()); | 46 ASSERT(argument_count == this->argument_count()); |
49 __ BranchLinkOffset(THR, Thread::OffsetFromThread(this)); | 47 __ BranchLinkOffset(THR, Thread::OffsetFromThread(this)); |
50 } else { | 48 } else { |
51 // Argument count is not checked here, but in the runtime entry for a more | 49 // Argument count is not checked here, but in the runtime entry for a more |
52 // informative error message. | 50 // informative error message. |
53 __ LoadFromOffset(kWord, R9, THR, Thread::OffsetFromThread(this)); | 51 __ LoadFromOffset(kWord, R9, THR, Thread::OffsetFromThread(this)); |
54 __ LoadImmediate(R4, argument_count); | 52 __ LoadImmediate(R4, argument_count); |
55 __ BranchLinkToRuntime(); | 53 __ BranchLinkToRuntime(); |
56 } | 54 } |
57 } | 55 } |
58 | 56 |
59 } // namespace dart | 57 } // namespace dart |
60 | 58 |
61 #endif // defined TARGET_ARCH_ARM | 59 #endif // defined TARGET_ARCH_ARM |
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