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Side by Side Diff: src/assembler.cpp

Issue 700263003: Rearrange emit vs emitIAS. Wait till function is done before dumping text. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: remove comment... might end up using the iterator Created 6 years, 1 month ago
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1 //===- subzero/src/assembler.cpp - Assembler base class -------------------===// 1 //===- subzero/src/assembler.cpp - Assembler base class -------------------===//
2 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 2 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
3 // for details. All rights reserved. Use of this source code is governed by a 3 // for details. All rights reserved. Use of this source code is governed by a
4 // BSD-style license that can be found in the LICENSE file. 4 // BSD-style license that can be found in the LICENSE file.
5 // 5 //
6 // Modified by the Subzero authors. 6 // Modified by the Subzero authors.
7 // 7 //
8 //===----------------------------------------------------------------------===// 8 //===----------------------------------------------------------------------===//
9 // 9 //
10 // The Subzero Code Generator 10 // The Subzero Code Generator
11 // 11 //
12 // This file is distributed under the University of Illinois Open Source 12 // This file is distributed under the University of Illinois Open Source
13 // License. See LICENSE.TXT for details. 13 // License. See LICENSE.TXT for details.
14 // 14 //
15 //===----------------------------------------------------------------------===// 15 //===----------------------------------------------------------------------===//
16 // 16 //
17 // This file implements the Assembler class. 17 // This file implements the Assembler class.
18 // 18 //
19 //===----------------------------------------------------------------------===// 19 //===----------------------------------------------------------------------===//
20 20
21 #include "assembler.h" 21 #include "assembler.h"
22 #include "IceGlobalContext.h"
22 #include "IceMemoryRegion.h" 23 #include "IceMemoryRegion.h"
24 #include "IceOperand.h"
23 25
24 namespace Ice { 26 namespace Ice {
25 27
26 static uintptr_t NewContents(Assembler &assembler, intptr_t capacity) { 28 static uintptr_t NewContents(Assembler &assembler, intptr_t capacity) {
27 uintptr_t result = assembler.AllocateBytes(capacity); 29 uintptr_t result = assembler.AllocateBytes(capacity);
28 return result; 30 return result;
29 } 31 }
30 32
31 #ifndef NDEBUG 33 #ifndef NDEBUG
32 AssemblerBuffer::EnsureCapacity::EnsureCapacity(AssemblerBuffer *buffer) { 34 AssemblerBuffer::EnsureCapacity::EnsureCapacity(AssemblerBuffer *buffer) {
(...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after
67 fixups_processed_ = false; 69 fixups_processed_ = false;
68 #endif // !NDEBUG 70 #endif // !NDEBUG
69 71
70 // Verify internal state. 72 // Verify internal state.
71 assert(Capacity() == kInitialBufferCapacity); 73 assert(Capacity() == kInitialBufferCapacity);
72 assert(Size() == 0); 74 assert(Size() == 0);
73 } 75 }
74 76
75 AssemblerBuffer::~AssemblerBuffer() {} 77 AssemblerBuffer::~AssemblerBuffer() {}
76 78
77 // Returns the latest fixup at or after the given position, or nullptr if
78 // there is none. Assumes fixups were added in increasing order.
79 AssemblerFixup *AssemblerBuffer::GetLatestFixup(intptr_t position) const {
80 AssemblerFixup *latest_fixup = nullptr;
81 for (auto I = fixups_.rbegin(), E = fixups_.rend(); I != E; ++I) {
82 if ((*I)->position() < position)
83 return latest_fixup;
84 latest_fixup = *I;
85 }
86 return latest_fixup;
87 }
88
89 void AssemblerBuffer::ProcessFixups(const MemoryRegion &region) { 79 void AssemblerBuffer::ProcessFixups(const MemoryRegion &region) {
90 for (SizeT I = 0; I < fixups_.size(); ++I) { 80 for (SizeT I = 0; I < fixups_.size(); ++I) {
91 AssemblerFixup *fixup = fixups_[I]; 81 AssemblerFixup *fixup = fixups_[I];
92 fixup->Process(region, fixup->position()); 82 fixup->Process(region, fixup->position());
93 } 83 }
94 } 84 }
95 85
96 void AssemblerBuffer::FinalizeInstructions(const MemoryRegion &instructions) { 86 void AssemblerBuffer::FinalizeInstructions(const MemoryRegion &instructions) {
97 // Copy the instructions from the buffer. 87 // Copy the instructions from the buffer.
98 MemoryRegion from(reinterpret_cast<void *>(contents()), Size()); 88 MemoryRegion from(reinterpret_cast<void *>(contents()), Size());
(...skipping 27 matching lines...) Expand all
126 116
127 // Update the cursor and recompute the limit. 117 // Update the cursor and recompute the limit.
128 cursor_ += delta; 118 cursor_ += delta;
129 limit_ = ComputeLimit(new_contents, new_capacity); 119 limit_ = ComputeLimit(new_contents, new_capacity);
130 120
131 // Verify internal state. 121 // Verify internal state.
132 assert(Capacity() == new_capacity); 122 assert(Capacity() == new_capacity);
133 assert(Size() == old_size); 123 assert(Size() == old_size);
134 } 124 }
135 125
126 void Assembler::emitIASBytes(GlobalContext *Ctx) const {
127 Ostream &Str = Ctx->getStrEmit();
128 intptr_t EndPosition = buffer_.Size();
129 intptr_t CurPosition = 0;
130 const intptr_t FixupSize = 4;
131 for (AssemblerBuffer::FixupList::const_iterator
132 FixupI = buffer_.fixups_begin(),
133 FixupE = buffer_.fixups_end(); FixupI != FixupE; ++FixupI) {
134 AssemblerFixup *NextFixup = *FixupI;
135 intptr_t NextFixupLoc = NextFixup->position();
136 for (intptr_t i = CurPosition; i < NextFixupLoc; ++i) {
137 Str << "\t.byte 0x";
138 Str.write_hex(buffer_.Load<uint8_t>(i));
139 Str << "\n";
140 }
141 Str << "\t.long ";
142 const ConstantRelocatable *Reloc = NextFixup->value();
143 if (Reloc->getSuppressMangling())
144 Str << Reloc->getName();
145 else
146 Str << Ctx->mangleName(Reloc->getName());
147 if (Reloc->getOffset()) {
148 Str << " + " << Reloc->getOffset();
149 }
150 bool IsPCRel = NextFixup->kind() == FK_PcRel_4;
151 if (IsPCRel)
152 Str << " - (. + " << FixupSize << ")";
153 Str << "\n";
154 CurPosition = NextFixupLoc + FixupSize;
155 assert(CurPosition <= EndPosition);
156 }
157 // Handle any bytes that are not prefixed by a fixup.
158 for (intptr_t i = CurPosition; i < EndPosition; ++i) {
159 Str << "\t.byte 0x";
160 Str.write_hex(buffer_.Load<uint8_t>(i));
161 Str << "\n";
162 }
163 }
164
136 } // end of namespace Ice 165 } // end of namespace Ice
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