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Side by Side Diff: runtime/vm/intrinsifier_mips.cc

Issue 1985813002: Add an intrinsified early out path for Dart timeline calls (Closed) Base URL: git@github.com:dart-lang/sdk.git@master
Patch Set: Created 4 years, 7 months ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2013, 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" // Needed here to get TARGET_ARCH_MIPS. 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_MIPS.
6 #if defined(TARGET_ARCH_MIPS) 6 #if defined(TARGET_ARCH_MIPS)
7 7
8 #include "vm/intrinsifier.h" 8 #include "vm/intrinsifier.h"
9 9
10 #include "vm/assembler.h" 10 #include "vm/assembler.h"
11 #include "vm/dart_entry.h" 11 #include "vm/dart_entry.h"
12 #include "vm/flow_graph_compiler.h" 12 #include "vm/flow_graph_compiler.h"
13 #include "vm/object.h" 13 #include "vm/object.h"
14 #include "vm/object_store.h" 14 #include "vm/object_store.h"
15 #include "vm/regexp_assembler.h" 15 #include "vm/regexp_assembler.h"
16 #include "vm/symbols.h" 16 #include "vm/symbols.h"
17 #include "vm/timeline.h"
17 18
18 namespace dart { 19 namespace dart {
19 20
20 // When entering intrinsics code: 21 // When entering intrinsics code:
21 // S4: Arguments descriptor 22 // S4: Arguments descriptor
22 // RA: Return address 23 // RA: Return address
23 // The S4 register can be destroyed only if there is no slow-path, i.e. 24 // The S4 register can be destroyed only if there is no slow-path, i.e.
24 // if the intrinsified method always executes a return. 25 // if the intrinsified method always executes a return.
25 // The FP register should not be modified, because it is used by the profiler. 26 // The FP register should not be modified, because it is used by the profiler.
26 // The PP and THR registers (see constants_mips.h) must be preserved. 27 // The PP and THR registers (see constants_mips.h) must be preserved.
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2201 __ delay_slot()->lw(V0, Address(V0, Isolate::default_tag_offset())); 2202 __ delay_slot()->lw(V0, Address(V0, Isolate::default_tag_offset()));
2202 } 2203 }
2203 2204
2204 2205
2205 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) { 2206 void Intrinsifier::Profiler_getCurrentTag(Assembler* assembler) {
2206 __ LoadIsolate(V0); 2207 __ LoadIsolate(V0);
2207 __ Ret(); 2208 __ Ret();
2208 __ delay_slot()->lw(V0, Address(V0, Isolate::current_tag_offset())); 2209 __ delay_slot()->lw(V0, Address(V0, Isolate::current_tag_offset()));
2209 } 2210 }
2210 2211
2212
2213 void Intrinsifier::Timeline_isDartStreamEnabled(Assembler* assembler) {
2214 Label true_label;
2215 // Load TimelineStream*.
2216 __ lw(V0, Address(THR, Thread::dart_stream_offset()));
2217 // Load uintptr_t from TimelineStream*.
2218 __ lw(V0, Address(V0, TimelineStream::enabled_offset()));
2219 __ bne(V0, ZR, &true_label);
2220 // Not enabled.
2221 __ LoadObject(V0, Bool::False());
2222 __ Ret();
2223 // Enabled.
2224 __ Bind(&true_label);
2225 __ LoadObject(V0, Bool::True());
2226 __ Ret();
2227 }
2228
2211 } // namespace dart 2229 } // namespace dart
2212 2230
2213 #endif // defined TARGET_ARCH_MIPS 2231 #endif // defined TARGET_ARCH_MIPS
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