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Side by Side Diff: src/IceAssembler.cpp

Issue 1179563004: Renames the assembler* files. (Closed) Base URL: https://chromium.googlesource.com/native_client/pnacl-subzero.git@master
Patch Set: Changes the top comment for IceAssemblerX8632.cpp Created 5 years, 6 months ago
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1 //===- subzero/src/assembler.cpp - Assembler base class -------------------===// 1 //===- subzero/src/IceAssembler.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 // This is forked from Dart revision 39313. 8 // This is forked from Dart revision 39313.
9 // Please update the revision if we merge back changes from Dart. 9 // Please update the revision if we merge back changes from Dart.
10 // https://code.google.com/p/dart/wiki/GettingTheSource 10 // https://code.google.com/p/dart/wiki/GettingTheSource
11 // 11 //
12 //===----------------------------------------------------------------------===// 12 //===----------------------------------------------------------------------===//
13 // 13 //
14 // The Subzero Code Generator 14 // The Subzero Code Generator
15 // 15 //
16 // This file is distributed under the University of Illinois Open Source 16 // This file is distributed under the University of Illinois Open Source
17 // License. See LICENSE.TXT for details. 17 // License. See LICENSE.TXT for details.
18 // 18 //
19 //===----------------------------------------------------------------------===// 19 //===----------------------------------------------------------------------===//
20 // 20 //
21 // This file implements the Assembler class. 21 // This file implements the Assembler base class.
22 // 22 //
23 //===----------------------------------------------------------------------===// 23 //===----------------------------------------------------------------------===//
24 24
25 #include "assembler.h" 25 #include "IceAssembler.h"
26 #include "IceGlobalContext.h" 26 #include "IceGlobalContext.h"
27 #include "IceOperand.h" 27 #include "IceOperand.h"
28 28
29 namespace Ice { 29 namespace Ice {
30 30
31 static uintptr_t NewContents(Assembler &assembler, intptr_t capacity) { 31 static uintptr_t NewContents(Assembler &Assemblr, intptr_t Capacity) {
32 uintptr_t result = assembler.AllocateBytes(capacity); 32 uintptr_t Result = Assemblr.allocateBytes(Capacity);
33 return result; 33 return Result;
34 } 34 }
35 35
36 AssemblerFixup *AssemblerBuffer::createFixup(FixupKind Kind, 36 AssemblerFixup *AssemblerBuffer::createFixup(FixupKind Kind,
37 const Constant *Value) { 37 const Constant *Value) {
38 AssemblerFixup *F = 38 AssemblerFixup *F =
39 new (assembler_.Allocate<AssemblerFixup>()) AssemblerFixup(); 39 new (Assemblr.allocate<AssemblerFixup>()) AssemblerFixup();
40 F->set_position(0); 40 F->set_position(0);
41 F->set_kind(Kind); 41 F->set_kind(Kind);
42 F->set_value(Value); 42 F->set_value(Value);
43 if (!assembler_.getPreliminary()) 43 if (!Assemblr.getPreliminary())
44 fixups_.push_back(F); 44 Fixups.push_back(F);
45 return F; 45 return F;
46 } 46 }
47 47
48 #ifndef NDEBUG 48 #ifndef NDEBUG
49 AssemblerBuffer::EnsureCapacity::EnsureCapacity(AssemblerBuffer *buffer) { 49 AssemblerBuffer::EnsureCapacity::EnsureCapacity(AssemblerBuffer *buffer) {
50 if (buffer->cursor() >= buffer->limit()) 50 if (buffer->cursor() >= buffer->limit())
51 buffer->ExtendCapacity(); 51 buffer->extendCapacity();
52 // In debug mode, we save the assembler buffer along with the gap 52 // In debug mode, we save the assembler buffer along with the gap
53 // size before we start emitting to the buffer. This allows us to 53 // size before we start emitting to the buffer. This allows us to
54 // check that any single generated instruction doesn't overflow the 54 // check that any single generated instruction doesn't overflow the
55 // limit implied by the minimum gap size. 55 // limit implied by the minimum gap size.
56 buffer_ = buffer; 56 Buffer = buffer;
57 gap_ = ComputeGap(); 57 Gap = computeGap();
58 // Make sure that extending the capacity leaves a big enough gap 58 // Make sure that extending the capacity leaves a big enough gap
59 // for any kind of instruction. 59 // for any kind of instruction.
60 assert(gap_ >= kMinimumGap); 60 assert(Gap >= kMinimumGap);
61 // Mark the buffer as having ensured the capacity. 61 // Mark the buffer as having ensured the capacity.
62 assert(!buffer->HasEnsuredCapacity()); // Cannot nest. 62 assert(!buffer->hasEnsuredCapacity()); // Cannot nest.
63 buffer->has_ensured_capacity_ = true; 63 buffer->HasEnsuredCapacity = true;
64 } 64 }
65 65
66 AssemblerBuffer::EnsureCapacity::~EnsureCapacity() { 66 AssemblerBuffer::EnsureCapacity::~EnsureCapacity() {
67 // Unmark the buffer, so we cannot emit after this. 67 // Unmark the buffer, so we cannot emit after this.
68 buffer_->has_ensured_capacity_ = false; 68 Buffer->HasEnsuredCapacity = false;
69 // Make sure the generated instruction doesn't take up more 69 // Make sure the generated instruction doesn't take up more
70 // space than the minimum gap. 70 // space than the minimum gap.
71 intptr_t delta = gap_ - ComputeGap(); 71 intptr_t delta = Gap - computeGap();
72 assert(delta <= kMinimumGap); 72 assert(delta <= kMinimumGap);
73 } 73 }
74 #endif // !NDEBUG 74 #endif // !NDEBUG
75 75
76 AssemblerBuffer::AssemblerBuffer(Assembler &assembler) : assembler_(assembler) { 76 AssemblerBuffer::AssemblerBuffer(Assembler &Asm) : Assemblr(Asm) {
77 const intptr_t OneKB = 1024; 77 const intptr_t OneKB = 1024;
78 static const intptr_t kInitialBufferCapacity = 4 * OneKB; 78 static const intptr_t kInitialBufferCapacity = 4 * OneKB;
79 contents_ = NewContents(assembler_, kInitialBufferCapacity); 79 Contents = NewContents(Assemblr, kInitialBufferCapacity);
80 cursor_ = contents_; 80 Cursor = Contents;
81 limit_ = ComputeLimit(contents_, kInitialBufferCapacity); 81 Limit = computeLimit(Contents, kInitialBufferCapacity);
82 #ifndef NDEBUG 82 #ifndef NDEBUG
83 has_ensured_capacity_ = false; 83 HasEnsuredCapacity = false;
84 #endif // !NDEBUG 84 #endif // !NDEBUG
85 85
86 // Verify internal state. 86 // Verify internal state.
87 assert(Capacity() == kInitialBufferCapacity); 87 assert(capacity() == kInitialBufferCapacity);
88 assert(Size() == 0); 88 assert(size() == 0);
89 } 89 }
90 90
91 AssemblerBuffer::~AssemblerBuffer() {} 91 AssemblerBuffer::~AssemblerBuffer() {}
92 92
93 void AssemblerBuffer::ExtendCapacity() { 93 void AssemblerBuffer::extendCapacity() {
94 intptr_t old_size = Size(); 94 intptr_t old_size = size();
95 intptr_t old_capacity = Capacity(); 95 intptr_t old_capacity = capacity();
96 const intptr_t OneMB = 1 << 20; 96 const intptr_t OneMB = 1 << 20;
97 intptr_t new_capacity = std::min(old_capacity * 2, old_capacity + OneMB); 97 intptr_t new_capacity = std::min(old_capacity * 2, old_capacity + OneMB);
98 if (new_capacity < old_capacity) { 98 if (new_capacity < old_capacity) {
99 llvm::report_fatal_error( 99 llvm::report_fatal_error(
100 "Unexpected overflow in AssemblerBuffer::ExtendCapacity"); 100 "Unexpected overflow in AssemblerBuffer::ExtendCapacity");
101 } 101 }
102 102
103 // Allocate the new data area and copy contents of the old one to it. 103 // Allocate the new data area and copy contents of the old one to it.
104 uintptr_t new_contents = NewContents(assembler_, new_capacity); 104 uintptr_t new_contents = NewContents(Assemblr, new_capacity);
105 memmove(reinterpret_cast<void *>(new_contents), 105 memmove(reinterpret_cast<void *>(new_contents),
106 reinterpret_cast<void *>(contents_), old_size); 106 reinterpret_cast<void *>(Contents), old_size);
107 107
108 // Compute the relocation delta and switch to the new contents area. 108 // Compute the relocation delta and switch to the new contents area.
109 intptr_t delta = new_contents - contents_; 109 intptr_t delta = new_contents - Contents;
110 contents_ = new_contents; 110 Contents = new_contents;
111 111
112 // Update the cursor and recompute the limit. 112 // Update the cursor and recompute the limit.
113 cursor_ += delta; 113 Cursor += delta;
114 limit_ = ComputeLimit(new_contents, new_capacity); 114 Limit = computeLimit(new_contents, new_capacity);
115 115
116 // Verify internal state. 116 // Verify internal state.
117 assert(Capacity() == new_capacity); 117 assert(capacity() == new_capacity);
118 assert(Size() == old_size); 118 assert(size() == old_size);
119 } 119 }
120 120
121 llvm::StringRef Assembler::getBufferView() const { 121 llvm::StringRef Assembler::getBufferView() const {
122 return llvm::StringRef(reinterpret_cast<const char *>(buffer_.contents()), 122 return llvm::StringRef(reinterpret_cast<const char *>(Buffer.contents()),
123 buffer_.Size()); 123 Buffer.size());
124 } 124 }
125 125
126 void Assembler::emitIASBytes(GlobalContext *Ctx) const { 126 void Assembler::emitIASBytes(GlobalContext *Ctx) const {
127 Ostream &Str = Ctx->getStrEmit(); 127 Ostream &Str = Ctx->getStrEmit();
128 intptr_t EndPosition = buffer_.Size(); 128 intptr_t EndPosition = Buffer.size();
129 intptr_t CurPosition = 0; 129 intptr_t CurPosition = 0;
130 const intptr_t FixupSize = 4; 130 const intptr_t FixupSize = 4;
131 for (const AssemblerFixup *NextFixup : fixups()) { 131 for (const AssemblerFixup *NextFixup : fixups()) {
132 intptr_t NextFixupLoc = NextFixup->position(); 132 intptr_t NextFixupLoc = NextFixup->position();
133 for (intptr_t i = CurPosition; i < NextFixupLoc; ++i) { 133 for (intptr_t i = CurPosition; i < NextFixupLoc; ++i) {
134 Str << "\t.byte 0x"; 134 Str << "\t.byte 0x";
135 Str.write_hex(buffer_.Load<uint8_t>(i)); 135 Str.write_hex(Buffer.load<uint8_t>(i));
136 Str << "\n"; 136 Str << "\n";
137 } 137 }
138 Str << "\t.long "; 138 Str << "\t.long ";
139 NextFixup->emit(Ctx, buffer_.Load<RelocOffsetT>(NextFixupLoc)); 139 NextFixup->emit(Ctx, Buffer.load<RelocOffsetT>(NextFixupLoc));
140 if (fixupIsPCRel(NextFixup->kind())) 140 if (fixupIsPCRel(NextFixup->kind()))
141 Str << " - ."; 141 Str << " - .";
142 Str << "\n"; 142 Str << "\n";
143 CurPosition = NextFixupLoc + FixupSize; 143 CurPosition = NextFixupLoc + FixupSize;
144 assert(CurPosition <= EndPosition); 144 assert(CurPosition <= EndPosition);
145 } 145 }
146 // Handle any bytes that are not prefixed by a fixup. 146 // Handle any bytes that are not prefixed by a fixup.
147 for (intptr_t i = CurPosition; i < EndPosition; ++i) { 147 for (intptr_t i = CurPosition; i < EndPosition; ++i) {
148 Str << "\t.byte 0x"; 148 Str << "\t.byte 0x";
149 Str.write_hex(buffer_.Load<uint8_t>(i)); 149 Str.write_hex(Buffer.load<uint8_t>(i));
150 Str << "\n"; 150 Str << "\n";
151 } 151 }
152 } 152 }
153 153
154 } // end of namespace Ice 154 } // end of namespace Ice
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