vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 28 | #include "v8.h" |
| 29 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 30 | #if defined(V8_TARGET_ARCH_X64) |
| 31 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 32 | #include "bootstrapper.h" |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 33 | #include "codegen.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 34 | #include "assembler-x64.h" |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 35 | #include "macro-assembler-x64.h" |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 36 | #include "serialize.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 37 | #include "debug.h" |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 38 | #include "heap.h" |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 39 | |
| 40 | namespace v8 { |
| 41 | namespace internal { |
| 42 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 43 | MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size) |
| 44 | : Assembler(arg_isolate, buffer, size), |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 45 | generating_stub_(false), |
| 46 | allow_stub_calls_(true), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 47 | has_frame_(false), |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 48 | root_array_available_(true) { |
| 49 | if (isolate() != NULL) { |
| 50 | code_object_ = Handle<Object>(isolate()->heap()->undefined_value(), |
| 51 | isolate()); |
| 52 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 56 | static intptr_t RootRegisterDelta(ExternalReference other, Isolate* isolate) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 57 | Address roots_register_value = kRootRegisterBias + |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 58 | reinterpret_cast<Address>(isolate->heap()->roots_array_start()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 59 | intptr_t delta = other.address() - roots_register_value; |
| 60 | return delta; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | Operand MacroAssembler::ExternalOperand(ExternalReference target, |
| 65 | Register scratch) { |
| 66 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 67 | intptr_t delta = RootRegisterDelta(target, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 68 | if (is_int32(delta)) { |
| 69 | Serializer::TooLateToEnableNow(); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 70 | return Operand(kRootRegister, static_cast<int32_t>(delta)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | movq(scratch, target); |
| 74 | return Operand(scratch, 0); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | void MacroAssembler::Load(Register destination, ExternalReference source) { |
| 79 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 80 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 81 | if (is_int32(delta)) { |
| 82 | Serializer::TooLateToEnableNow(); |
| 83 | movq(destination, Operand(kRootRegister, static_cast<int32_t>(delta))); |
| 84 | return; |
| 85 | } |
| 86 | } |
| 87 | // Safe code. |
| 88 | if (destination.is(rax)) { |
| 89 | load_rax(source); |
| 90 | } else { |
| 91 | movq(kScratchRegister, source); |
| 92 | movq(destination, Operand(kScratchRegister, 0)); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | |
| 97 | void MacroAssembler::Store(ExternalReference destination, Register source) { |
| 98 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 99 | intptr_t delta = RootRegisterDelta(destination, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 100 | if (is_int32(delta)) { |
| 101 | Serializer::TooLateToEnableNow(); |
| 102 | movq(Operand(kRootRegister, static_cast<int32_t>(delta)), source); |
| 103 | return; |
| 104 | } |
| 105 | } |
| 106 | // Safe code. |
| 107 | if (source.is(rax)) { |
| 108 | store_rax(destination); |
| 109 | } else { |
| 110 | movq(kScratchRegister, destination); |
| 111 | movq(Operand(kScratchRegister, 0), source); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | |
| 116 | void MacroAssembler::LoadAddress(Register destination, |
| 117 | ExternalReference source) { |
| 118 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 119 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 120 | if (is_int32(delta)) { |
| 121 | Serializer::TooLateToEnableNow(); |
| 122 | lea(destination, Operand(kRootRegister, static_cast<int32_t>(delta))); |
| 123 | return; |
| 124 | } |
| 125 | } |
| 126 | // Safe code. |
| 127 | movq(destination, source); |
| 128 | } |
| 129 | |
| 130 | |
| 131 | int MacroAssembler::LoadAddressSize(ExternalReference source) { |
| 132 | if (root_array_available_ && !Serializer::enabled()) { |
| 133 | // This calculation depends on the internals of LoadAddress. |
| 134 | // It's correctness is ensured by the asserts in the Call |
| 135 | // instruction below. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 136 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 137 | if (is_int32(delta)) { |
| 138 | Serializer::TooLateToEnableNow(); |
| 139 | // Operand is lea(scratch, Operand(kRootRegister, delta)); |
| 140 | // Opcodes : REX.W 8D ModRM Disp8/Disp32 - 4 or 7. |
| 141 | int size = 4; |
| 142 | if (!is_int8(static_cast<int32_t>(delta))) { |
| 143 | size += 3; // Need full four-byte displacement in lea. |
| 144 | } |
| 145 | return size; |
| 146 | } |
| 147 | } |
| 148 | // Size of movq(destination, src); |
| 149 | return 10; |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 150 | } |
| 151 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 152 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 153 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 154 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 155 | movq(destination, Operand(kRootRegister, |
| 156 | (index << kPointerSizeLog2) - kRootRegisterBias)); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | void MacroAssembler::LoadRootIndexed(Register destination, |
| 161 | Register variable_offset, |
| 162 | int fixed_offset) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 163 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 164 | movq(destination, |
| 165 | Operand(kRootRegister, |
| 166 | variable_offset, times_pointer_size, |
| 167 | (fixed_offset << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 171 | void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 172 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 173 | movq(Operand(kRootRegister, (index << kPointerSizeLog2) - kRootRegisterBias), |
| 174 | source); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 178 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 179 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 180 | push(Operand(kRootRegister, (index << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 184 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 185 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 186 | cmpq(with, Operand(kRootRegister, |
| 187 | (index << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 188 | } |
| 189 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 190 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 191 | void MacroAssembler::CompareRoot(const Operand& with, |
| 192 | Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 193 | ASSERT(root_array_available_); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 194 | ASSERT(!with.AddressUsesRegister(kScratchRegister)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 195 | LoadRoot(kScratchRegister, index); |
| 196 | cmpq(with, kScratchRegister); |
| 197 | } |
| 198 | |
| 199 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 200 | void MacroAssembler::RememberedSetHelper(Register object, // For debug tests. |
| 201 | Register addr, |
| 202 | Register scratch, |
| 203 | SaveFPRegsMode save_fp, |
| 204 | RememberedSetFinalAction and_then) { |
| 205 | if (FLAG_debug_code) { |
| 206 | Label ok; |
| 207 | JumpIfNotInNewSpace(object, scratch, &ok, Label::kNear); |
| 208 | int3(); |
| 209 | bind(&ok); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 210 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 211 | // Load store buffer top. |
| 212 | LoadRoot(scratch, Heap::kStoreBufferTopRootIndex); |
| 213 | // Store pointer to buffer. |
| 214 | movq(Operand(scratch, 0), addr); |
| 215 | // Increment buffer top. |
| 216 | addq(scratch, Immediate(kPointerSize)); |
| 217 | // Write back new top of buffer. |
| 218 | StoreRoot(scratch, Heap::kStoreBufferTopRootIndex); |
| 219 | // Call stub on end of buffer. |
| 220 | Label done; |
| 221 | // Check for end of buffer. |
| 222 | testq(scratch, Immediate(StoreBuffer::kStoreBufferOverflowBit)); |
| 223 | if (and_then == kReturnAtEnd) { |
| 224 | Label buffer_overflowed; |
| 225 | j(not_equal, &buffer_overflowed, Label::kNear); |
| 226 | ret(0); |
| 227 | bind(&buffer_overflowed); |
| 228 | } else { |
| 229 | ASSERT(and_then == kFallThroughAtEnd); |
| 230 | j(equal, &done, Label::kNear); |
| 231 | } |
| 232 | StoreBufferOverflowStub store_buffer_overflow = |
| 233 | StoreBufferOverflowStub(save_fp); |
| 234 | CallStub(&store_buffer_overflow); |
| 235 | if (and_then == kReturnAtEnd) { |
| 236 | ret(0); |
| 237 | } else { |
| 238 | ASSERT(and_then == kFallThroughAtEnd); |
| 239 | bind(&done); |
| 240 | } |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 244 | void MacroAssembler::InNewSpace(Register object, |
| 245 | Register scratch, |
| 246 | Condition cc, |
| 247 | Label* branch, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 248 | Label::Distance distance) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 249 | if (Serializer::enabled()) { |
| 250 | // Can't do arithmetic on external references if it might get serialized. |
| 251 | // The mask isn't really an address. We load it as an external reference in |
| 252 | // case the size of the new space is different between the snapshot maker |
| 253 | // and the running system. |
| 254 | if (scratch.is(object)) { |
| 255 | movq(kScratchRegister, ExternalReference::new_space_mask(isolate())); |
| 256 | and_(scratch, kScratchRegister); |
| 257 | } else { |
| 258 | movq(scratch, ExternalReference::new_space_mask(isolate())); |
| 259 | and_(scratch, object); |
| 260 | } |
| 261 | movq(kScratchRegister, ExternalReference::new_space_start(isolate())); |
| 262 | cmpq(scratch, kScratchRegister); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 263 | j(cc, branch, distance); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 264 | } else { |
| 265 | ASSERT(is_int32(static_cast<int64_t>(HEAP->NewSpaceMask()))); |
| 266 | intptr_t new_space_start = |
| 267 | reinterpret_cast<intptr_t>(HEAP->NewSpaceStart()); |
| 268 | movq(kScratchRegister, -new_space_start, RelocInfo::NONE); |
| 269 | if (scratch.is(object)) { |
| 270 | addq(scratch, kScratchRegister); |
| 271 | } else { |
| 272 | lea(scratch, Operand(object, kScratchRegister, times_1, 0)); |
| 273 | } |
| 274 | and_(scratch, Immediate(static_cast<int32_t>(HEAP->NewSpaceMask()))); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 275 | j(cc, branch, distance); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 276 | } |
| 277 | } |
| 278 | |
| 279 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 280 | void MacroAssembler::RecordWriteField( |
| 281 | Register object, |
| 282 | int offset, |
| 283 | Register value, |
| 284 | Register dst, |
| 285 | SaveFPRegsMode save_fp, |
| 286 | RememberedSetAction remembered_set_action, |
| 287 | SmiCheck smi_check) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 288 | // The compiled code assumes that record write doesn't change the |
| 289 | // context register, so we check that none of the clobbered |
| 290 | // registers are rsi. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 291 | ASSERT(!value.is(rsi) && !dst.is(rsi)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 292 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 293 | // First, check if a write barrier is even needed. The tests below |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 294 | // catch stores of Smis. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 295 | Label done; |
| 296 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 297 | // Skip barrier if writing a smi. |
| 298 | if (smi_check == INLINE_SMI_CHECK) { |
| 299 | JumpIfSmi(value, &done); |
| 300 | } |
| 301 | |
| 302 | // Although the object register is tagged, the offset is relative to the start |
| 303 | // of the object, so so offset must be a multiple of kPointerSize. |
| 304 | ASSERT(IsAligned(offset, kPointerSize)); |
| 305 | |
| 306 | lea(dst, FieldOperand(object, offset)); |
| 307 | if (emit_debug_code()) { |
| 308 | Label ok; |
| 309 | testb(dst, Immediate((1 << kPointerSizeLog2) - 1)); |
| 310 | j(zero, &ok, Label::kNear); |
| 311 | int3(); |
| 312 | bind(&ok); |
| 313 | } |
| 314 | |
| 315 | RecordWrite( |
| 316 | object, dst, value, save_fp, remembered_set_action, OMIT_SMI_CHECK); |
| 317 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 318 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 319 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 320 | // Clobber clobbered input registers when running with the debug-code flag |
| 321 | // turned on to provoke errors. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 322 | if (emit_debug_code()) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 323 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 324 | movq(dst, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 325 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 329 | void MacroAssembler::RecordWriteArray(Register object, |
| 330 | Register value, |
| 331 | Register index, |
| 332 | SaveFPRegsMode save_fp, |
| 333 | RememberedSetAction remembered_set_action, |
| 334 | SmiCheck smi_check) { |
| 335 | // First, check if a write barrier is even needed. The tests below |
| 336 | // catch stores of Smis. |
| 337 | Label done; |
| 338 | |
| 339 | // Skip barrier if writing a smi. |
| 340 | if (smi_check == INLINE_SMI_CHECK) { |
| 341 | JumpIfSmi(value, &done); |
| 342 | } |
| 343 | |
| 344 | // Array access: calculate the destination address. Index is not a smi. |
| 345 | Register dst = index; |
| 346 | lea(dst, Operand(object, index, times_pointer_size, |
| 347 | FixedArray::kHeaderSize - kHeapObjectTag)); |
| 348 | |
| 349 | RecordWrite( |
| 350 | object, dst, value, save_fp, remembered_set_action, OMIT_SMI_CHECK); |
| 351 | |
| 352 | bind(&done); |
| 353 | |
| 354 | // Clobber clobbered input registers when running with the debug-code flag |
| 355 | // turned on to provoke errors. |
| 356 | if (emit_debug_code()) { |
| 357 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 358 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 359 | } |
| 360 | } |
| 361 | |
| 362 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 363 | void MacroAssembler::RecordWrite(Register object, |
| 364 | Register address, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 365 | Register value, |
| 366 | SaveFPRegsMode fp_mode, |
| 367 | RememberedSetAction remembered_set_action, |
| 368 | SmiCheck smi_check) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 369 | // The compiled code assumes that record write doesn't change the |
| 370 | // context register, so we check that none of the clobbered |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 371 | // registers are rsi. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 372 | ASSERT(!value.is(rsi) && !address.is(rsi)); |
| 373 | |
| 374 | ASSERT(!object.is(value)); |
| 375 | ASSERT(!object.is(address)); |
| 376 | ASSERT(!value.is(address)); |
| 377 | if (emit_debug_code()) { |
| 378 | AbortIfSmi(object); |
| 379 | } |
| 380 | |
| 381 | if (remembered_set_action == OMIT_REMEMBERED_SET && |
| 382 | !FLAG_incremental_marking) { |
| 383 | return; |
| 384 | } |
| 385 | |
| 386 | if (FLAG_debug_code) { |
| 387 | Label ok; |
| 388 | cmpq(value, Operand(address, 0)); |
| 389 | j(equal, &ok, Label::kNear); |
| 390 | int3(); |
| 391 | bind(&ok); |
| 392 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 393 | |
| 394 | // First, check if a write barrier is even needed. The tests below |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 395 | // catch stores of smis and stores into the young generation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 396 | Label done; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 397 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 398 | if (smi_check == INLINE_SMI_CHECK) { |
| 399 | // Skip barrier if writing a smi. |
| 400 | JumpIfSmi(value, &done); |
| 401 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 402 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 403 | CheckPageFlag(value, |
| 404 | value, // Used as scratch. |
| 405 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 406 | zero, |
| 407 | &done, |
| 408 | Label::kNear); |
| 409 | |
| 410 | CheckPageFlag(object, |
| 411 | value, // Used as scratch. |
| 412 | MemoryChunk::kPointersFromHereAreInterestingMask, |
| 413 | zero, |
| 414 | &done, |
| 415 | Label::kNear); |
| 416 | |
| 417 | RecordWriteStub stub(object, value, address, remembered_set_action, fp_mode); |
| 418 | CallStub(&stub); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 419 | |
| 420 | bind(&done); |
| 421 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 422 | // Clobber clobbered registers when running with the debug-code flag |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 423 | // turned on to provoke errors. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 424 | if (emit_debug_code()) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 425 | movq(address, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 426 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 431 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 432 | if (emit_debug_code()) Check(cc, msg); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 436 | void MacroAssembler::AssertFastElements(Register elements) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 437 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 438 | Label ok; |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 439 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 440 | Heap::kFixedArrayMapRootIndex); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 441 | j(equal, &ok, Label::kNear); |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 442 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
svenpanne@chromium.org | 84bcc55 | 2011-07-18 09:50:57 +0000 | [diff] [blame] | 443 | Heap::kFixedDoubleArrayMapRootIndex); |
| 444 | j(equal, &ok, Label::kNear); |
| 445 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 446 | Heap::kFixedCOWArrayMapRootIndex); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 447 | j(equal, &ok, Label::kNear); |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 448 | Abort("JSObject with fast elements map has slow elements"); |
| 449 | bind(&ok); |
| 450 | } |
| 451 | } |
| 452 | |
| 453 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 454 | void MacroAssembler::Check(Condition cc, const char* msg) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 455 | Label L; |
| 456 | j(cc, &L, Label::kNear); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 457 | Abort(msg); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 458 | // Control will not return here. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 459 | bind(&L); |
| 460 | } |
| 461 | |
| 462 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 463 | void MacroAssembler::CheckStackAlignment() { |
| 464 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 465 | int frame_alignment_mask = frame_alignment - 1; |
| 466 | if (frame_alignment > kPointerSize) { |
| 467 | ASSERT(IsPowerOf2(frame_alignment)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 468 | Label alignment_as_expected; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 469 | testq(rsp, Immediate(frame_alignment_mask)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 470 | j(zero, &alignment_as_expected, Label::kNear); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 471 | // Abort if stack is not aligned. |
| 472 | int3(); |
| 473 | bind(&alignment_as_expected); |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 478 | void MacroAssembler::NegativeZeroTest(Register result, |
| 479 | Register op, |
| 480 | Label* then_label) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 481 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 482 | testl(result, result); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 483 | j(not_zero, &ok, Label::kNear); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 484 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 485 | j(sign, then_label); |
| 486 | bind(&ok); |
| 487 | } |
| 488 | |
| 489 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 490 | void MacroAssembler::Abort(const char* msg) { |
| 491 | // We want to pass the msg string like a smi to avoid GC |
| 492 | // problems, however msg is not guaranteed to be aligned |
| 493 | // properly. Instead, we pass an aligned pointer that is |
| 494 | // a proper v8 smi, but also pass the alignment difference |
| 495 | // from the real pointer as a smi. |
| 496 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 497 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 498 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 499 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 500 | #ifdef DEBUG |
| 501 | if (msg != NULL) { |
| 502 | RecordComment("Abort message: "); |
| 503 | RecordComment(msg); |
| 504 | } |
| 505 | #endif |
| 506 | push(rax); |
| 507 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 508 | push(kScratchRegister); |
| 509 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 510 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 511 | RelocInfo::NONE); |
| 512 | push(kScratchRegister); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 513 | |
| 514 | if (!has_frame_) { |
| 515 | // We don't actually want to generate a pile of code for this, so just |
| 516 | // claim there is a stack frame, without generating one. |
| 517 | FrameScope scope(this, StackFrame::NONE); |
| 518 | CallRuntime(Runtime::kAbort, 2); |
| 519 | } else { |
| 520 | CallRuntime(Runtime::kAbort, 2); |
| 521 | } |
| 522 | // Control will not return here. |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 523 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 527 | void MacroAssembler::CallStub(CodeStub* stub, unsigned ast_id) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 528 | ASSERT(AllowThisStubCall(stub)); // Calls are not allowed in some stubs |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 529 | Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 533 | MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 534 | ASSERT(AllowThisStubCall(stub)); // Calls are not allowed in some stubs. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 535 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 536 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 537 | call(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 538 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 539 | } |
| 540 | return result; |
| 541 | } |
| 542 | |
| 543 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 544 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 545 | ASSERT(allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe()); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 546 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 547 | } |
| 548 | |
| 549 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 550 | MaybeObject* MacroAssembler::TryTailCallStub(CodeStub* stub) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 551 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 552 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 553 | jmp(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 554 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 555 | } |
| 556 | return result; |
| 557 | } |
| 558 | |
| 559 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 560 | void MacroAssembler::StubReturn(int argc) { |
| 561 | ASSERT(argc >= 1 && generating_stub()); |
| 562 | ret((argc - 1) * kPointerSize); |
| 563 | } |
| 564 | |
| 565 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 566 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
| 567 | if (!has_frame_ && stub->SometimesSetsUpAFrame()) return false; |
| 568 | return allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe(); |
| 569 | } |
| 570 | |
| 571 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 572 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 573 | if (num_arguments > 0) { |
| 574 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 575 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 576 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 580 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 581 | // The assert checks that the constants for the maximum number of digits |
| 582 | // for an array index cached in the hash field and the number of bits |
| 583 | // reserved for it does not conflict. |
| 584 | ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| 585 | (1 << String::kArrayIndexValueBits)); |
| 586 | // We want the smi-tagged index in key. Even if we subsequently go to |
| 587 | // the slow case, converting the key to a smi is always valid. |
| 588 | // key: string key |
| 589 | // hash: key's hash field, including its array index value. |
| 590 | and_(hash, Immediate(String::kArrayIndexValueMask)); |
| 591 | shr(hash, Immediate(String::kHashShift)); |
| 592 | // Here we actually clobber the key which will be used if calling into |
| 593 | // runtime later. However as the new key is the numeric value of a string key |
| 594 | // there is no difference in using either key. |
| 595 | Integer32ToSmi(index, hash); |
| 596 | } |
| 597 | |
| 598 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 599 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 600 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 601 | } |
| 602 | |
| 603 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 604 | void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 605 | const Runtime::Function* function = Runtime::FunctionForId(id); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 606 | Set(rax, function->nargs); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 607 | LoadAddress(rbx, ExternalReference(function, isolate())); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 608 | CEntryStub ces(1, kSaveFPRegs); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 609 | CallStub(&ces); |
| 610 | } |
| 611 | |
| 612 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 613 | MaybeObject* MacroAssembler::TryCallRuntime(Runtime::FunctionId id, |
| 614 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 615 | return TryCallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 616 | } |
| 617 | |
| 618 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 619 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
| 620 | int num_arguments) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 621 | // If the expected number of arguments of the runtime function is |
| 622 | // constant, we check that the actual number of arguments match the |
| 623 | // expectation. |
| 624 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 625 | IllegalOperation(num_arguments); |
| 626 | return; |
| 627 | } |
| 628 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 629 | // TODO(1236192): Most runtime routines don't need the number of |
| 630 | // arguments passed in because it is constant. At some point we |
| 631 | // should remove this need and make the runtime routine entry code |
| 632 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 633 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 634 | LoadAddress(rbx, ExternalReference(f, isolate())); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 635 | CEntryStub ces(f->result_size); |
| 636 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 640 | MaybeObject* MacroAssembler::TryCallRuntime(const Runtime::Function* f, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 641 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 642 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 643 | IllegalOperation(num_arguments); |
| 644 | // Since we did not call the stub, there was no allocation failure. |
| 645 | // Return some non-failure object. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 646 | return HEAP->undefined_value(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | // TODO(1236192): Most runtime routines don't need the number of |
| 650 | // arguments passed in because it is constant. At some point we |
| 651 | // should remove this need and make the runtime routine entry code |
| 652 | // smarter. |
| 653 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 654 | LoadAddress(rbx, ExternalReference(f, isolate())); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 655 | CEntryStub ces(f->result_size); |
| 656 | return TryCallStub(&ces); |
| 657 | } |
| 658 | |
| 659 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 660 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 661 | int num_arguments) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 662 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 663 | LoadAddress(rbx, ext); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 664 | |
| 665 | CEntryStub stub(1); |
| 666 | CallStub(&stub); |
| 667 | } |
| 668 | |
| 669 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 670 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 671 | int num_arguments, |
| 672 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 673 | // ----------- S t a t e ------------- |
| 674 | // -- rsp[0] : return address |
| 675 | // -- rsp[8] : argument num_arguments - 1 |
| 676 | // ... |
| 677 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 678 | // ----------------------------------- |
| 679 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 680 | // TODO(1236192): Most runtime routines don't need the number of |
| 681 | // arguments passed in because it is constant. At some point we |
| 682 | // should remove this need and make the runtime routine entry code |
| 683 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 684 | Set(rax, num_arguments); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 685 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 689 | MaybeObject* MacroAssembler::TryTailCallExternalReference( |
| 690 | const ExternalReference& ext, int num_arguments, int result_size) { |
| 691 | // ----------- S t a t e ------------- |
| 692 | // -- rsp[0] : return address |
| 693 | // -- rsp[8] : argument num_arguments - 1 |
| 694 | // ... |
| 695 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 696 | // ----------------------------------- |
| 697 | |
| 698 | // TODO(1236192): Most runtime routines don't need the number of |
| 699 | // arguments passed in because it is constant. At some point we |
| 700 | // should remove this need and make the runtime routine entry code |
| 701 | // smarter. |
| 702 | Set(rax, num_arguments); |
| 703 | return TryJumpToExternalReference(ext, result_size); |
| 704 | } |
| 705 | |
| 706 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 707 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 708 | int num_arguments, |
| 709 | int result_size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 710 | TailCallExternalReference(ExternalReference(fid, isolate()), |
| 711 | num_arguments, |
| 712 | result_size); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 716 | MaybeObject* MacroAssembler::TryTailCallRuntime(Runtime::FunctionId fid, |
| 717 | int num_arguments, |
| 718 | int result_size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 719 | return TryTailCallExternalReference(ExternalReference(fid, isolate()), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 720 | num_arguments, |
| 721 | result_size); |
| 722 | } |
| 723 | |
| 724 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 725 | static int Offset(ExternalReference ref0, ExternalReference ref1) { |
| 726 | int64_t offset = (ref0.address() - ref1.address()); |
| 727 | // Check that fits into int. |
| 728 | ASSERT(static_cast<int>(offset) == offset); |
| 729 | return static_cast<int>(offset); |
| 730 | } |
| 731 | |
| 732 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 733 | void MacroAssembler::PrepareCallApiFunction(int arg_stack_space) { |
| 734 | #ifdef _WIN64 |
| 735 | // We need to prepare a slot for result handle on stack and put |
| 736 | // a pointer to it into 1st arg register. |
| 737 | EnterApiExitFrame(arg_stack_space + 1); |
| 738 | |
| 739 | // rcx must be used to pass the pointer to the return value slot. |
| 740 | lea(rcx, StackSpaceOperand(arg_stack_space)); |
| 741 | #else |
| 742 | EnterApiExitFrame(arg_stack_space); |
| 743 | #endif |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 744 | } |
| 745 | |
| 746 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 747 | MaybeObject* MacroAssembler::TryCallApiFunctionAndReturn( |
| 748 | ApiFunction* function, int stack_space) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 749 | Label empty_result; |
| 750 | Label prologue; |
| 751 | Label promote_scheduled_exception; |
| 752 | Label delete_allocated_handles; |
| 753 | Label leave_exit_frame; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 754 | Label write_back; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 755 | |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 756 | Factory* factory = isolate()->factory(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 757 | ExternalReference next_address = |
| 758 | ExternalReference::handle_scope_next_address(); |
| 759 | const int kNextOffset = 0; |
| 760 | const int kLimitOffset = Offset( |
| 761 | ExternalReference::handle_scope_limit_address(), |
| 762 | next_address); |
| 763 | const int kLevelOffset = Offset( |
| 764 | ExternalReference::handle_scope_level_address(), |
| 765 | next_address); |
| 766 | ExternalReference scheduled_exception_address = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 767 | ExternalReference::scheduled_exception_address(isolate()); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 768 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 769 | // Allocate HandleScope in callee-save registers. |
| 770 | Register prev_next_address_reg = r14; |
| 771 | Register prev_limit_reg = rbx; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 772 | Register base_reg = r15; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 773 | movq(base_reg, next_address); |
| 774 | movq(prev_next_address_reg, Operand(base_reg, kNextOffset)); |
| 775 | movq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 776 | addl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 777 | // Call the api function! |
| 778 | movq(rax, |
| 779 | reinterpret_cast<int64_t>(function->address()), |
| 780 | RelocInfo::RUNTIME_ENTRY); |
| 781 | call(rax); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 782 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 783 | #ifdef _WIN64 |
| 784 | // rax keeps a pointer to v8::Handle, unpack it. |
| 785 | movq(rax, Operand(rax, 0)); |
| 786 | #endif |
| 787 | // Check if the result handle holds 0. |
| 788 | testq(rax, rax); |
| 789 | j(zero, &empty_result); |
| 790 | // It was non-zero. Dereference to get the result value. |
| 791 | movq(rax, Operand(rax, 0)); |
| 792 | bind(&prologue); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 793 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 794 | // No more valid handles (the result handle was the last one). Restore |
| 795 | // previous handle scope. |
| 796 | subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 797 | movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
| 798 | cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 799 | j(not_equal, &delete_allocated_handles); |
| 800 | bind(&leave_exit_frame); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 801 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 802 | // Check if the function scheduled an exception. |
| 803 | movq(rsi, scheduled_exception_address); |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 804 | Cmp(Operand(rsi, 0), factory->the_hole_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 805 | j(not_equal, &promote_scheduled_exception); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 806 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 807 | LeaveApiExitFrame(); |
| 808 | ret(stack_space * kPointerSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 809 | |
| 810 | bind(&promote_scheduled_exception); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 811 | MaybeObject* result = TryTailCallRuntime(Runtime::kPromoteScheduledException, |
| 812 | 0, 1); |
| 813 | if (result->IsFailure()) { |
| 814 | return result; |
| 815 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 816 | |
| 817 | bind(&empty_result); |
| 818 | // It was zero; the result is undefined. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 819 | Move(rax, factory->undefined_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 820 | jmp(&prologue); |
| 821 | |
| 822 | // HandleScope limit has changed. Delete allocated extensions. |
| 823 | bind(&delete_allocated_handles); |
| 824 | movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
| 825 | movq(prev_limit_reg, rax); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 826 | #ifdef _WIN64 |
| 827 | LoadAddress(rcx, ExternalReference::isolate_address()); |
| 828 | #else |
| 829 | LoadAddress(rdi, ExternalReference::isolate_address()); |
| 830 | #endif |
| 831 | LoadAddress(rax, |
| 832 | ExternalReference::delete_handle_scope_extensions(isolate())); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 833 | call(rax); |
| 834 | movq(rax, prev_limit_reg); |
| 835 | jmp(&leave_exit_frame); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 836 | |
| 837 | return result; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 838 | } |
| 839 | |
| 840 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 841 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 842 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 843 | // Set the entry point and jump to the C entry runtime stub. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 844 | LoadAddress(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 845 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 846 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 847 | } |
| 848 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 849 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 850 | MaybeObject* MacroAssembler::TryJumpToExternalReference( |
| 851 | const ExternalReference& ext, int result_size) { |
| 852 | // Set the entry point and jump to the C entry runtime stub. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 853 | LoadAddress(rbx, ext); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 854 | CEntryStub ces(result_size); |
| 855 | return TryTailCallStub(&ces); |
| 856 | } |
| 857 | |
| 858 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 859 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, |
| 860 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 861 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 862 | // You can't call a builtin without a valid frame. |
| 863 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 864 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 865 | // Rely on the assertion to check that the number of provided |
| 866 | // arguments match the expected number of arguments. Fake a |
| 867 | // parameter count to avoid emitting code to do the check. |
| 868 | ParameterCount expected(0); |
| 869 | GetBuiltinEntry(rdx, id); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 870 | InvokeCode(rdx, expected, expected, flag, call_wrapper, CALL_AS_METHOD); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 871 | } |
| 872 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 873 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 874 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 875 | Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 876 | // Load the builtins object into target register. |
| 877 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 878 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 879 | movq(target, FieldOperand(target, |
| 880 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 881 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 882 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 883 | |
| 884 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 885 | ASSERT(!target.is(rdi)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 886 | // Load the JavaScript builtin function from the builtins object. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 887 | GetBuiltinFunction(rdi, id); |
| 888 | movq(target, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 889 | } |
| 890 | |
| 891 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 892 | static const Register saved_regs[] = |
| 893 | { rax, rcx, rdx, rbx, rbp, rsi, rdi, r8, r9, r10, r11 }; |
| 894 | static const int kNumberOfSavedRegs = sizeof(saved_regs) / sizeof(Register); |
| 895 | |
| 896 | |
| 897 | void MacroAssembler::PushCallerSaved(SaveFPRegsMode fp_mode, |
| 898 | Register exclusion1, |
| 899 | Register exclusion2, |
| 900 | Register exclusion3) { |
| 901 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 902 | // store the registers in any particular way, but we do have to store and |
| 903 | // restore them. |
| 904 | for (int i = 0; i < kNumberOfSavedRegs; i++) { |
| 905 | Register reg = saved_regs[i]; |
| 906 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 907 | push(reg); |
| 908 | } |
| 909 | } |
| 910 | // R12 to r15 are callee save on all platforms. |
| 911 | if (fp_mode == kSaveFPRegs) { |
| 912 | CpuFeatures::Scope scope(SSE2); |
| 913 | subq(rsp, Immediate(kDoubleSize * XMMRegister::kNumRegisters)); |
| 914 | for (int i = 0; i < XMMRegister::kNumRegisters; i++) { |
| 915 | XMMRegister reg = XMMRegister::from_code(i); |
| 916 | movsd(Operand(rsp, i * kDoubleSize), reg); |
| 917 | } |
| 918 | } |
| 919 | } |
| 920 | |
| 921 | |
| 922 | void MacroAssembler::PopCallerSaved(SaveFPRegsMode fp_mode, |
| 923 | Register exclusion1, |
| 924 | Register exclusion2, |
| 925 | Register exclusion3) { |
| 926 | if (fp_mode == kSaveFPRegs) { |
| 927 | CpuFeatures::Scope scope(SSE2); |
| 928 | for (int i = 0; i < XMMRegister::kNumRegisters; i++) { |
| 929 | XMMRegister reg = XMMRegister::from_code(i); |
| 930 | movsd(reg, Operand(rsp, i * kDoubleSize)); |
| 931 | } |
| 932 | addq(rsp, Immediate(kDoubleSize * XMMRegister::kNumRegisters)); |
| 933 | } |
| 934 | for (int i = kNumberOfSavedRegs - 1; i >= 0; i--) { |
| 935 | Register reg = saved_regs[i]; |
| 936 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 937 | pop(reg); |
| 938 | } |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 943 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 944 | if (x == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 945 | xorl(dst, dst); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 946 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 947 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 948 | } else if (is_int32(x)) { |
| 949 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 950 | } else { |
| 951 | movq(dst, x, RelocInfo::NONE); |
| 952 | } |
| 953 | } |
| 954 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 955 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 956 | if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 957 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 958 | } else { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 959 | Set(kScratchRegister, x); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 960 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 961 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 962 | } |
| 963 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 964 | // ---------------------------------------------------------------------------- |
| 965 | // Smi tagging, untagging and tag detection. |
| 966 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 967 | Register MacroAssembler::GetSmiConstant(Smi* source) { |
| 968 | int value = source->value(); |
| 969 | if (value == 0) { |
| 970 | xorl(kScratchRegister, kScratchRegister); |
| 971 | return kScratchRegister; |
| 972 | } |
| 973 | if (value == 1) { |
| 974 | return kSmiConstantRegister; |
| 975 | } |
| 976 | LoadSmiConstant(kScratchRegister, source); |
| 977 | return kScratchRegister; |
| 978 | } |
| 979 | |
| 980 | void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 981 | if (emit_debug_code()) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 982 | movq(dst, |
| 983 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 984 | RelocInfo::NONE); |
| 985 | cmpq(dst, kSmiConstantRegister); |
| 986 | if (allow_stub_calls()) { |
| 987 | Assert(equal, "Uninitialized kSmiConstantRegister"); |
| 988 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 989 | Label ok; |
| 990 | j(equal, &ok, Label::kNear); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 991 | int3(); |
| 992 | bind(&ok); |
| 993 | } |
| 994 | } |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 995 | int value = source->value(); |
| 996 | if (value == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 997 | xorl(dst, dst); |
| 998 | return; |
| 999 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1000 | bool negative = value < 0; |
| 1001 | unsigned int uvalue = negative ? -value : value; |
| 1002 | |
| 1003 | switch (uvalue) { |
| 1004 | case 9: |
| 1005 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_8, 0)); |
| 1006 | break; |
| 1007 | case 8: |
| 1008 | xorl(dst, dst); |
| 1009 | lea(dst, Operand(dst, kSmiConstantRegister, times_8, 0)); |
| 1010 | break; |
| 1011 | case 4: |
| 1012 | xorl(dst, dst); |
| 1013 | lea(dst, Operand(dst, kSmiConstantRegister, times_4, 0)); |
| 1014 | break; |
| 1015 | case 5: |
| 1016 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_4, 0)); |
| 1017 | break; |
| 1018 | case 3: |
| 1019 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_2, 0)); |
| 1020 | break; |
| 1021 | case 2: |
| 1022 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_1, 0)); |
| 1023 | break; |
| 1024 | case 1: |
| 1025 | movq(dst, kSmiConstantRegister); |
| 1026 | break; |
| 1027 | case 0: |
| 1028 | UNREACHABLE(); |
| 1029 | return; |
| 1030 | default: |
| 1031 | movq(dst, reinterpret_cast<uint64_t>(source), RelocInfo::NONE); |
| 1032 | return; |
| 1033 | } |
| 1034 | if (negative) { |
| 1035 | neg(dst); |
| 1036 | } |
| 1037 | } |
| 1038 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1039 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1040 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1041 | STATIC_ASSERT(kSmiTag == 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1042 | if (!dst.is(src)) { |
| 1043 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1044 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1045 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1049 | void MacroAssembler::Integer32ToSmiField(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1050 | if (emit_debug_code()) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1051 | testb(dst, Immediate(0x01)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1052 | Label ok; |
| 1053 | j(zero, &ok, Label::kNear); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1054 | if (allow_stub_calls()) { |
| 1055 | Abort("Integer32ToSmiField writing to non-smi location"); |
| 1056 | } else { |
| 1057 | int3(); |
| 1058 | } |
| 1059 | bind(&ok); |
| 1060 | } |
| 1061 | ASSERT(kSmiShift % kBitsPerByte == 0); |
| 1062 | movl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 1063 | } |
| 1064 | |
| 1065 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1066 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 1067 | Register src, |
| 1068 | int constant) { |
| 1069 | if (dst.is(src)) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1070 | addl(dst, Immediate(constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1071 | } else { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1072 | leal(dst, Operand(src, constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1073 | } |
| 1074 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1075 | } |
| 1076 | |
| 1077 | |
| 1078 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1079 | STATIC_ASSERT(kSmiTag == 0); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1080 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1081 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1082 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1083 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1087 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 1088 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 1089 | } |
| 1090 | |
| 1091 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1092 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1093 | STATIC_ASSERT(kSmiTag == 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1094 | if (!dst.is(src)) { |
| 1095 | movq(dst, src); |
| 1096 | } |
| 1097 | sar(dst, Immediate(kSmiShift)); |
| 1098 | } |
| 1099 | |
| 1100 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1101 | void MacroAssembler::SmiToInteger64(Register dst, const Operand& src) { |
| 1102 | movsxlq(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 1103 | } |
| 1104 | |
| 1105 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1106 | void MacroAssembler::SmiTest(Register src) { |
| 1107 | testq(src, src); |
| 1108 | } |
| 1109 | |
| 1110 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1111 | void MacroAssembler::SmiCompare(Register smi1, Register smi2) { |
| 1112 | if (emit_debug_code()) { |
| 1113 | AbortIfNotSmi(smi1); |
| 1114 | AbortIfNotSmi(smi2); |
| 1115 | } |
| 1116 | cmpq(smi1, smi2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | |
| 1120 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1121 | if (emit_debug_code()) { |
| 1122 | AbortIfNotSmi(dst); |
| 1123 | } |
| 1124 | Cmp(dst, src); |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | void MacroAssembler::Cmp(Register dst, Smi* src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1129 | ASSERT(!dst.is(kScratchRegister)); |
| 1130 | if (src->value() == 0) { |
| 1131 | testq(dst, dst); |
| 1132 | } else { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1133 | Register constant_reg = GetSmiConstant(src); |
| 1134 | cmpq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1139 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1140 | if (emit_debug_code()) { |
| 1141 | AbortIfNotSmi(dst); |
| 1142 | AbortIfNotSmi(src); |
| 1143 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1144 | cmpq(dst, src); |
| 1145 | } |
| 1146 | |
| 1147 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1148 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1149 | if (emit_debug_code()) { |
| 1150 | AbortIfNotSmi(dst); |
| 1151 | AbortIfNotSmi(src); |
| 1152 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1153 | cmpq(dst, src); |
| 1154 | } |
| 1155 | |
| 1156 | |
| 1157 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1158 | if (emit_debug_code()) { |
| 1159 | AbortIfNotSmi(dst); |
| 1160 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1161 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1165 | void MacroAssembler::Cmp(const Operand& dst, Smi* src) { |
| 1166 | // The Operand cannot use the smi register. |
| 1167 | Register smi_reg = GetSmiConstant(src); |
| 1168 | ASSERT(!dst.AddressUsesRegister(smi_reg)); |
| 1169 | cmpq(dst, smi_reg); |
| 1170 | } |
| 1171 | |
| 1172 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1173 | void MacroAssembler::SmiCompareInteger32(const Operand& dst, Register src) { |
| 1174 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 1175 | } |
| 1176 | |
| 1177 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1178 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 1179 | Register src, |
| 1180 | int power) { |
| 1181 | ASSERT(power >= 0); |
| 1182 | ASSERT(power < 64); |
| 1183 | if (power == 0) { |
| 1184 | SmiToInteger64(dst, src); |
| 1185 | return; |
| 1186 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1187 | if (!dst.is(src)) { |
| 1188 | movq(dst, src); |
| 1189 | } |
| 1190 | if (power < kSmiShift) { |
| 1191 | sar(dst, Immediate(kSmiShift - power)); |
| 1192 | } else if (power > kSmiShift) { |
| 1193 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1198 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 1199 | Register src, |
| 1200 | int power) { |
| 1201 | ASSERT((0 <= power) && (power < 32)); |
| 1202 | if (dst.is(src)) { |
| 1203 | shr(dst, Immediate(power + kSmiShift)); |
| 1204 | } else { |
| 1205 | UNIMPLEMENTED(); // Not used. |
| 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1210 | void MacroAssembler::SmiOrIfSmis(Register dst, Register src1, Register src2, |
| 1211 | Label* on_not_smis, |
| 1212 | Label::Distance near_jump) { |
| 1213 | if (dst.is(src1) || dst.is(src2)) { |
| 1214 | ASSERT(!src1.is(kScratchRegister)); |
| 1215 | ASSERT(!src2.is(kScratchRegister)); |
| 1216 | movq(kScratchRegister, src1); |
| 1217 | or_(kScratchRegister, src2); |
| 1218 | JumpIfNotSmi(kScratchRegister, on_not_smis, near_jump); |
| 1219 | movq(dst, kScratchRegister); |
| 1220 | } else { |
| 1221 | movq(dst, src1); |
| 1222 | or_(dst, src2); |
| 1223 | JumpIfNotSmi(dst, on_not_smis, near_jump); |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1228 | Condition MacroAssembler::CheckSmi(Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1229 | STATIC_ASSERT(kSmiTag == 0); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1230 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1231 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1235 | Condition MacroAssembler::CheckSmi(const Operand& src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1236 | STATIC_ASSERT(kSmiTag == 0); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1237 | testb(src, Immediate(kSmiTagMask)); |
| 1238 | return zero; |
| 1239 | } |
| 1240 | |
| 1241 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1242 | Condition MacroAssembler::CheckNonNegativeSmi(Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1243 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1244 | // Test that both bits of the mask 0x8000000000000001 are zero. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1245 | movq(kScratchRegister, src); |
| 1246 | rol(kScratchRegister, Immediate(1)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1247 | testb(kScratchRegister, Immediate(3)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1248 | return zero; |
| 1249 | } |
| 1250 | |
| 1251 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1252 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 1253 | if (first.is(second)) { |
| 1254 | return CheckSmi(first); |
| 1255 | } |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1256 | STATIC_ASSERT(kSmiTag == 0 && kHeapObjectTag == 1 && kHeapObjectTagMask == 3); |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 1257 | leal(kScratchRegister, Operand(first, second, times_1, 0)); |
| 1258 | testb(kScratchRegister, Immediate(0x03)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1259 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1260 | } |
| 1261 | |
| 1262 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1263 | Condition MacroAssembler::CheckBothNonNegativeSmi(Register first, |
| 1264 | Register second) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1265 | if (first.is(second)) { |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1266 | return CheckNonNegativeSmi(first); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1267 | } |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 1268 | movq(kScratchRegister, first); |
| 1269 | or_(kScratchRegister, second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1270 | rol(kScratchRegister, Immediate(1)); |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1271 | testl(kScratchRegister, Immediate(3)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1272 | return zero; |
| 1273 | } |
| 1274 | |
| 1275 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1276 | Condition MacroAssembler::CheckEitherSmi(Register first, |
| 1277 | Register second, |
| 1278 | Register scratch) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1279 | if (first.is(second)) { |
| 1280 | return CheckSmi(first); |
| 1281 | } |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1282 | if (scratch.is(second)) { |
| 1283 | andl(scratch, first); |
| 1284 | } else { |
| 1285 | if (!scratch.is(first)) { |
| 1286 | movl(scratch, first); |
| 1287 | } |
| 1288 | andl(scratch, second); |
| 1289 | } |
| 1290 | testb(scratch, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1291 | return zero; |
| 1292 | } |
| 1293 | |
| 1294 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1295 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1296 | ASSERT(!src.is(kScratchRegister)); |
| 1297 | // If we overflow by subtracting one, it's the minimal smi value. |
| 1298 | cmpq(src, kSmiConstantRegister); |
| 1299 | return overflow; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1300 | } |
| 1301 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1302 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1303 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1304 | // A 32-bit integer value can always be converted to a smi. |
| 1305 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1306 | } |
| 1307 | |
| 1308 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1309 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 1310 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 1311 | // is not set. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1312 | testl(src, src); |
| 1313 | return positive; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1317 | void MacroAssembler::CheckSmiToIndicator(Register dst, Register src) { |
| 1318 | if (dst.is(src)) { |
| 1319 | andl(dst, Immediate(kSmiTagMask)); |
| 1320 | } else { |
| 1321 | movl(dst, Immediate(kSmiTagMask)); |
| 1322 | andl(dst, src); |
| 1323 | } |
| 1324 | } |
| 1325 | |
| 1326 | |
| 1327 | void MacroAssembler::CheckSmiToIndicator(Register dst, const Operand& src) { |
| 1328 | if (!(src.AddressUsesRegister(dst))) { |
| 1329 | movl(dst, Immediate(kSmiTagMask)); |
| 1330 | andl(dst, src); |
| 1331 | } else { |
| 1332 | movl(dst, src); |
| 1333 | andl(dst, Immediate(kSmiTagMask)); |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1338 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, |
| 1339 | Label* on_invalid, |
| 1340 | Label::Distance near_jump) { |
| 1341 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1342 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1343 | } |
| 1344 | |
| 1345 | |
| 1346 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1347 | Label* on_invalid, |
| 1348 | Label::Distance near_jump) { |
| 1349 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1350 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1351 | } |
| 1352 | |
| 1353 | |
| 1354 | void MacroAssembler::JumpIfSmi(Register src, |
| 1355 | Label* on_smi, |
| 1356 | Label::Distance near_jump) { |
| 1357 | Condition smi = CheckSmi(src); |
| 1358 | j(smi, on_smi, near_jump); |
| 1359 | } |
| 1360 | |
| 1361 | |
| 1362 | void MacroAssembler::JumpIfNotSmi(Register src, |
| 1363 | Label* on_not_smi, |
| 1364 | Label::Distance near_jump) { |
| 1365 | Condition smi = CheckSmi(src); |
| 1366 | j(NegateCondition(smi), on_not_smi, near_jump); |
| 1367 | } |
| 1368 | |
| 1369 | |
| 1370 | void MacroAssembler::JumpUnlessNonNegativeSmi( |
| 1371 | Register src, Label* on_not_smi_or_negative, |
| 1372 | Label::Distance near_jump) { |
| 1373 | Condition non_negative_smi = CheckNonNegativeSmi(src); |
| 1374 | j(NegateCondition(non_negative_smi), on_not_smi_or_negative, near_jump); |
| 1375 | } |
| 1376 | |
| 1377 | |
| 1378 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1379 | Smi* constant, |
| 1380 | Label* on_equals, |
| 1381 | Label::Distance near_jump) { |
| 1382 | SmiCompare(src, constant); |
| 1383 | j(equal, on_equals, near_jump); |
| 1384 | } |
| 1385 | |
| 1386 | |
| 1387 | void MacroAssembler::JumpIfNotBothSmi(Register src1, |
| 1388 | Register src2, |
| 1389 | Label* on_not_both_smi, |
| 1390 | Label::Distance near_jump) { |
| 1391 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1392 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1393 | } |
| 1394 | |
| 1395 | |
| 1396 | void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1, |
| 1397 | Register src2, |
| 1398 | Label* on_not_both_smi, |
| 1399 | Label::Distance near_jump) { |
| 1400 | Condition both_smi = CheckBothNonNegativeSmi(src1, src2); |
| 1401 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1402 | } |
| 1403 | |
| 1404 | |
| 1405 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 1406 | Register src, |
| 1407 | Smi* constant, |
| 1408 | Label* on_not_smi_result, |
| 1409 | Label::Distance near_jump) { |
| 1410 | // Does not assume that src is a smi. |
| 1411 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1412 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1413 | ASSERT(!dst.is(kScratchRegister)); |
| 1414 | ASSERT(!src.is(kScratchRegister)); |
| 1415 | |
| 1416 | JumpIfNotSmi(src, on_not_smi_result, near_jump); |
| 1417 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 1418 | LoadSmiConstant(tmp, constant); |
| 1419 | addq(tmp, src); |
| 1420 | j(overflow, on_not_smi_result, near_jump); |
| 1421 | if (dst.is(src)) { |
| 1422 | movq(dst, tmp); |
| 1423 | } |
| 1424 | } |
| 1425 | |
| 1426 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1427 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 1428 | if (constant->value() == 0) { |
| 1429 | if (!dst.is(src)) { |
| 1430 | movq(dst, src); |
| 1431 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1432 | return; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1433 | } else if (dst.is(src)) { |
| 1434 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1435 | switch (constant->value()) { |
| 1436 | case 1: |
| 1437 | addq(dst, kSmiConstantRegister); |
| 1438 | return; |
| 1439 | case 2: |
| 1440 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1441 | return; |
| 1442 | case 4: |
| 1443 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1444 | return; |
| 1445 | case 8: |
| 1446 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1447 | return; |
| 1448 | default: |
| 1449 | Register constant_reg = GetSmiConstant(constant); |
| 1450 | addq(dst, constant_reg); |
| 1451 | return; |
| 1452 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1453 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1454 | switch (constant->value()) { |
| 1455 | case 1: |
| 1456 | lea(dst, Operand(src, kSmiConstantRegister, times_1, 0)); |
| 1457 | return; |
| 1458 | case 2: |
| 1459 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1460 | return; |
| 1461 | case 4: |
| 1462 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1463 | return; |
| 1464 | case 8: |
| 1465 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1466 | return; |
| 1467 | default: |
| 1468 | LoadSmiConstant(dst, constant); |
| 1469 | addq(dst, src); |
| 1470 | return; |
| 1471 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1472 | } |
| 1473 | } |
| 1474 | |
| 1475 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1476 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 1477 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1478 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1479 | } |
| 1480 | } |
| 1481 | |
| 1482 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1483 | void MacroAssembler::SmiAddConstant(Register dst, |
| 1484 | Register src, |
| 1485 | Smi* constant, |
| 1486 | Label* on_not_smi_result, |
| 1487 | Label::Distance near_jump) { |
| 1488 | if (constant->value() == 0) { |
| 1489 | if (!dst.is(src)) { |
| 1490 | movq(dst, src); |
| 1491 | } |
| 1492 | } else if (dst.is(src)) { |
| 1493 | ASSERT(!dst.is(kScratchRegister)); |
| 1494 | |
| 1495 | LoadSmiConstant(kScratchRegister, constant); |
| 1496 | addq(kScratchRegister, src); |
| 1497 | j(overflow, on_not_smi_result, near_jump); |
| 1498 | movq(dst, kScratchRegister); |
| 1499 | } else { |
| 1500 | LoadSmiConstant(dst, constant); |
| 1501 | addq(dst, src); |
| 1502 | j(overflow, on_not_smi_result, near_jump); |
| 1503 | } |
| 1504 | } |
| 1505 | |
| 1506 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1507 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 1508 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1509 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1510 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1511 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1512 | } else if (dst.is(src)) { |
| 1513 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1514 | Register constant_reg = GetSmiConstant(constant); |
| 1515 | subq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1516 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1517 | if (constant->value() == Smi::kMinValue) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1518 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1519 | // Adding and subtracting the min-value gives the same result, it only |
| 1520 | // differs on the overflow bit, which we don't check here. |
| 1521 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1522 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1523 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1524 | LoadSmiConstant(dst, Smi::FromInt(-constant->value())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1525 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1526 | } |
| 1527 | } |
| 1528 | } |
| 1529 | |
| 1530 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1531 | void MacroAssembler::SmiSubConstant(Register dst, |
| 1532 | Register src, |
| 1533 | Smi* constant, |
| 1534 | Label* on_not_smi_result, |
| 1535 | Label::Distance near_jump) { |
| 1536 | if (constant->value() == 0) { |
| 1537 | if (!dst.is(src)) { |
| 1538 | movq(dst, src); |
| 1539 | } |
| 1540 | } else if (dst.is(src)) { |
| 1541 | ASSERT(!dst.is(kScratchRegister)); |
| 1542 | if (constant->value() == Smi::kMinValue) { |
| 1543 | // Subtracting min-value from any non-negative value will overflow. |
| 1544 | // We test the non-negativeness before doing the subtraction. |
| 1545 | testq(src, src); |
| 1546 | j(not_sign, on_not_smi_result, near_jump); |
| 1547 | LoadSmiConstant(kScratchRegister, constant); |
| 1548 | subq(dst, kScratchRegister); |
| 1549 | } else { |
| 1550 | // Subtract by adding the negation. |
| 1551 | LoadSmiConstant(kScratchRegister, Smi::FromInt(-constant->value())); |
| 1552 | addq(kScratchRegister, dst); |
| 1553 | j(overflow, on_not_smi_result, near_jump); |
| 1554 | movq(dst, kScratchRegister); |
| 1555 | } |
| 1556 | } else { |
| 1557 | if (constant->value() == Smi::kMinValue) { |
| 1558 | // Subtracting min-value from any non-negative value will overflow. |
| 1559 | // We test the non-negativeness before doing the subtraction. |
| 1560 | testq(src, src); |
| 1561 | j(not_sign, on_not_smi_result, near_jump); |
| 1562 | LoadSmiConstant(dst, constant); |
| 1563 | // Adding and subtracting the min-value gives the same result, it only |
| 1564 | // differs on the overflow bit, which we don't check here. |
| 1565 | addq(dst, src); |
| 1566 | } else { |
| 1567 | // Subtract by adding the negation. |
| 1568 | LoadSmiConstant(dst, Smi::FromInt(-(constant->value()))); |
| 1569 | addq(dst, src); |
| 1570 | j(overflow, on_not_smi_result, near_jump); |
| 1571 | } |
| 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | void MacroAssembler::SmiNeg(Register dst, |
| 1577 | Register src, |
| 1578 | Label* on_smi_result, |
| 1579 | Label::Distance near_jump) { |
| 1580 | if (dst.is(src)) { |
| 1581 | ASSERT(!dst.is(kScratchRegister)); |
| 1582 | movq(kScratchRegister, src); |
| 1583 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 1584 | // Test if result is zero or Smi::kMinValue. |
| 1585 | cmpq(dst, kScratchRegister); |
| 1586 | j(not_equal, on_smi_result, near_jump); |
| 1587 | movq(src, kScratchRegister); |
| 1588 | } else { |
| 1589 | movq(dst, src); |
| 1590 | neg(dst); |
| 1591 | cmpq(dst, src); |
| 1592 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 1593 | j(not_equal, on_smi_result, near_jump); |
| 1594 | } |
| 1595 | } |
| 1596 | |
| 1597 | |
| 1598 | void MacroAssembler::SmiAdd(Register dst, |
| 1599 | Register src1, |
| 1600 | Register src2, |
| 1601 | Label* on_not_smi_result, |
| 1602 | Label::Distance near_jump) { |
| 1603 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1604 | ASSERT(!dst.is(src2)); |
| 1605 | if (dst.is(src1)) { |
| 1606 | movq(kScratchRegister, src1); |
| 1607 | addq(kScratchRegister, src2); |
| 1608 | j(overflow, on_not_smi_result, near_jump); |
| 1609 | movq(dst, kScratchRegister); |
| 1610 | } else { |
| 1611 | movq(dst, src1); |
| 1612 | addq(dst, src2); |
| 1613 | j(overflow, on_not_smi_result, near_jump); |
| 1614 | } |
| 1615 | } |
| 1616 | |
| 1617 | |
| 1618 | void MacroAssembler::SmiAdd(Register dst, |
| 1619 | Register src1, |
| 1620 | const Operand& src2, |
| 1621 | Label* on_not_smi_result, |
| 1622 | Label::Distance near_jump) { |
| 1623 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1624 | if (dst.is(src1)) { |
| 1625 | movq(kScratchRegister, src1); |
| 1626 | addq(kScratchRegister, src2); |
| 1627 | j(overflow, on_not_smi_result, near_jump); |
| 1628 | movq(dst, kScratchRegister); |
| 1629 | } else { |
| 1630 | ASSERT(!src2.AddressUsesRegister(dst)); |
| 1631 | movq(dst, src1); |
| 1632 | addq(dst, src2); |
| 1633 | j(overflow, on_not_smi_result, near_jump); |
| 1634 | } |
| 1635 | } |
| 1636 | |
| 1637 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1638 | void MacroAssembler::SmiAdd(Register dst, |
| 1639 | Register src1, |
| 1640 | Register src2) { |
| 1641 | // No overflow checking. Use only when it's known that |
| 1642 | // overflowing is impossible. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1643 | if (!dst.is(src1)) { |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 1644 | if (emit_debug_code()) { |
| 1645 | movq(kScratchRegister, src1); |
| 1646 | addq(kScratchRegister, src2); |
| 1647 | Check(no_overflow, "Smi addition overflow"); |
| 1648 | } |
| 1649 | lea(dst, Operand(src1, src2, times_1, 0)); |
| 1650 | } else { |
| 1651 | addq(dst, src2); |
| 1652 | Assert(no_overflow, "Smi addition overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1653 | } |
| 1654 | } |
| 1655 | |
| 1656 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1657 | void MacroAssembler::SmiSub(Register dst, |
| 1658 | Register src1, |
| 1659 | Register src2, |
| 1660 | Label* on_not_smi_result, |
| 1661 | Label::Distance near_jump) { |
| 1662 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1663 | ASSERT(!dst.is(src2)); |
| 1664 | if (dst.is(src1)) { |
| 1665 | cmpq(dst, src2); |
| 1666 | j(overflow, on_not_smi_result, near_jump); |
| 1667 | subq(dst, src2); |
| 1668 | } else { |
| 1669 | movq(dst, src1); |
| 1670 | subq(dst, src2); |
| 1671 | j(overflow, on_not_smi_result, near_jump); |
| 1672 | } |
| 1673 | } |
| 1674 | |
| 1675 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1676 | void MacroAssembler::SmiSub(Register dst, Register src1, Register src2) { |
| 1677 | // No overflow checking. Use only when it's known that |
| 1678 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1679 | ASSERT(!dst.is(src2)); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1680 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1681 | movq(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1682 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1683 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1684 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1685 | } |
| 1686 | |
| 1687 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1688 | void MacroAssembler::SmiSub(Register dst, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1689 | Register src1, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1690 | const Operand& src2, |
| 1691 | Label* on_not_smi_result, |
| 1692 | Label::Distance near_jump) { |
| 1693 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1694 | if (dst.is(src1)) { |
| 1695 | movq(kScratchRegister, src2); |
| 1696 | cmpq(src1, kScratchRegister); |
| 1697 | j(overflow, on_not_smi_result, near_jump); |
| 1698 | subq(src1, kScratchRegister); |
| 1699 | } else { |
| 1700 | movq(dst, src1); |
| 1701 | subq(dst, src2); |
| 1702 | j(overflow, on_not_smi_result, near_jump); |
| 1703 | } |
| 1704 | } |
| 1705 | |
| 1706 | |
| 1707 | void MacroAssembler::SmiSub(Register dst, |
| 1708 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1709 | const Operand& src2) { |
| 1710 | // No overflow checking. Use only when it's known that |
| 1711 | // overflowing is impossible (e.g., subtracting two positive smis). |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1712 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1713 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1714 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1715 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1716 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1717 | } |
| 1718 | |
| 1719 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1720 | void MacroAssembler::SmiMul(Register dst, |
| 1721 | Register src1, |
| 1722 | Register src2, |
| 1723 | Label* on_not_smi_result, |
| 1724 | Label::Distance near_jump) { |
| 1725 | ASSERT(!dst.is(src2)); |
| 1726 | ASSERT(!dst.is(kScratchRegister)); |
| 1727 | ASSERT(!src1.is(kScratchRegister)); |
| 1728 | ASSERT(!src2.is(kScratchRegister)); |
| 1729 | |
| 1730 | if (dst.is(src1)) { |
| 1731 | Label failure, zero_correct_result; |
| 1732 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 1733 | SmiToInteger64(dst, src1); |
| 1734 | imul(dst, src2); |
| 1735 | j(overflow, &failure, Label::kNear); |
| 1736 | |
| 1737 | // Check for negative zero result. If product is zero, and one |
| 1738 | // argument is negative, go to slow case. |
| 1739 | Label correct_result; |
| 1740 | testq(dst, dst); |
| 1741 | j(not_zero, &correct_result, Label::kNear); |
| 1742 | |
| 1743 | movq(dst, kScratchRegister); |
| 1744 | xor_(dst, src2); |
| 1745 | // Result was positive zero. |
| 1746 | j(positive, &zero_correct_result, Label::kNear); |
| 1747 | |
| 1748 | bind(&failure); // Reused failure exit, restores src1. |
| 1749 | movq(src1, kScratchRegister); |
| 1750 | jmp(on_not_smi_result, near_jump); |
| 1751 | |
| 1752 | bind(&zero_correct_result); |
| 1753 | Set(dst, 0); |
| 1754 | |
| 1755 | bind(&correct_result); |
| 1756 | } else { |
| 1757 | SmiToInteger64(dst, src1); |
| 1758 | imul(dst, src2); |
| 1759 | j(overflow, on_not_smi_result, near_jump); |
| 1760 | // Check for negative zero result. If product is zero, and one |
| 1761 | // argument is negative, go to slow case. |
| 1762 | Label correct_result; |
| 1763 | testq(dst, dst); |
| 1764 | j(not_zero, &correct_result, Label::kNear); |
| 1765 | // One of src1 and src2 is zero, the check whether the other is |
| 1766 | // negative. |
| 1767 | movq(kScratchRegister, src1); |
| 1768 | xor_(kScratchRegister, src2); |
| 1769 | j(negative, on_not_smi_result, near_jump); |
| 1770 | bind(&correct_result); |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | |
| 1775 | void MacroAssembler::SmiDiv(Register dst, |
| 1776 | Register src1, |
| 1777 | Register src2, |
| 1778 | Label* on_not_smi_result, |
| 1779 | Label::Distance near_jump) { |
| 1780 | ASSERT(!src1.is(kScratchRegister)); |
| 1781 | ASSERT(!src2.is(kScratchRegister)); |
| 1782 | ASSERT(!dst.is(kScratchRegister)); |
| 1783 | ASSERT(!src2.is(rax)); |
| 1784 | ASSERT(!src2.is(rdx)); |
| 1785 | ASSERT(!src1.is(rdx)); |
| 1786 | |
| 1787 | // Check for 0 divisor (result is +/-Infinity). |
| 1788 | testq(src2, src2); |
| 1789 | j(zero, on_not_smi_result, near_jump); |
| 1790 | |
| 1791 | if (src1.is(rax)) { |
| 1792 | movq(kScratchRegister, src1); |
| 1793 | } |
| 1794 | SmiToInteger32(rax, src1); |
| 1795 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 1796 | // overflow in idiv and raise an exception. |
| 1797 | // We combine this with negative zero test (negative zero only happens |
| 1798 | // when dividing zero by a negative number). |
| 1799 | |
| 1800 | // We overshoot a little and go to slow case if we divide min-value |
| 1801 | // by any negative value, not just -1. |
| 1802 | Label safe_div; |
| 1803 | testl(rax, Immediate(0x7fffffff)); |
| 1804 | j(not_zero, &safe_div, Label::kNear); |
| 1805 | testq(src2, src2); |
| 1806 | if (src1.is(rax)) { |
| 1807 | j(positive, &safe_div, Label::kNear); |
| 1808 | movq(src1, kScratchRegister); |
| 1809 | jmp(on_not_smi_result, near_jump); |
| 1810 | } else { |
| 1811 | j(negative, on_not_smi_result, near_jump); |
| 1812 | } |
| 1813 | bind(&safe_div); |
| 1814 | |
| 1815 | SmiToInteger32(src2, src2); |
| 1816 | // Sign extend src1 into edx:eax. |
| 1817 | cdq(); |
| 1818 | idivl(src2); |
| 1819 | Integer32ToSmi(src2, src2); |
| 1820 | // Check that the remainder is zero. |
| 1821 | testl(rdx, rdx); |
| 1822 | if (src1.is(rax)) { |
| 1823 | Label smi_result; |
| 1824 | j(zero, &smi_result, Label::kNear); |
| 1825 | movq(src1, kScratchRegister); |
| 1826 | jmp(on_not_smi_result, near_jump); |
| 1827 | bind(&smi_result); |
| 1828 | } else { |
| 1829 | j(not_zero, on_not_smi_result, near_jump); |
| 1830 | } |
| 1831 | if (!dst.is(src1) && src1.is(rax)) { |
| 1832 | movq(src1, kScratchRegister); |
| 1833 | } |
| 1834 | Integer32ToSmi(dst, rax); |
| 1835 | } |
| 1836 | |
| 1837 | |
| 1838 | void MacroAssembler::SmiMod(Register dst, |
| 1839 | Register src1, |
| 1840 | Register src2, |
| 1841 | Label* on_not_smi_result, |
| 1842 | Label::Distance near_jump) { |
| 1843 | ASSERT(!dst.is(kScratchRegister)); |
| 1844 | ASSERT(!src1.is(kScratchRegister)); |
| 1845 | ASSERT(!src2.is(kScratchRegister)); |
| 1846 | ASSERT(!src2.is(rax)); |
| 1847 | ASSERT(!src2.is(rdx)); |
| 1848 | ASSERT(!src1.is(rdx)); |
| 1849 | ASSERT(!src1.is(src2)); |
| 1850 | |
| 1851 | testq(src2, src2); |
| 1852 | j(zero, on_not_smi_result, near_jump); |
| 1853 | |
| 1854 | if (src1.is(rax)) { |
| 1855 | movq(kScratchRegister, src1); |
| 1856 | } |
| 1857 | SmiToInteger32(rax, src1); |
| 1858 | SmiToInteger32(src2, src2); |
| 1859 | |
| 1860 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1861 | Label safe_div; |
| 1862 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1863 | j(not_equal, &safe_div, Label::kNear); |
| 1864 | cmpl(src2, Immediate(-1)); |
| 1865 | j(not_equal, &safe_div, Label::kNear); |
| 1866 | // Retag inputs and go slow case. |
| 1867 | Integer32ToSmi(src2, src2); |
| 1868 | if (src1.is(rax)) { |
| 1869 | movq(src1, kScratchRegister); |
| 1870 | } |
| 1871 | jmp(on_not_smi_result, near_jump); |
| 1872 | bind(&safe_div); |
| 1873 | |
| 1874 | // Sign extend eax into edx:eax. |
| 1875 | cdq(); |
| 1876 | idivl(src2); |
| 1877 | // Restore smi tags on inputs. |
| 1878 | Integer32ToSmi(src2, src2); |
| 1879 | if (src1.is(rax)) { |
| 1880 | movq(src1, kScratchRegister); |
| 1881 | } |
| 1882 | // Check for a negative zero result. If the result is zero, and the |
| 1883 | // dividend is negative, go slow to return a floating point negative zero. |
| 1884 | Label smi_result; |
| 1885 | testl(rdx, rdx); |
| 1886 | j(not_zero, &smi_result, Label::kNear); |
| 1887 | testq(src1, src1); |
| 1888 | j(negative, on_not_smi_result, near_jump); |
| 1889 | bind(&smi_result); |
| 1890 | Integer32ToSmi(dst, rdx); |
| 1891 | } |
| 1892 | |
| 1893 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1894 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1895 | ASSERT(!dst.is(kScratchRegister)); |
| 1896 | ASSERT(!src.is(kScratchRegister)); |
| 1897 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1898 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1899 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1900 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1901 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1902 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1903 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1904 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1905 | } |
| 1906 | |
| 1907 | |
| 1908 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1909 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1910 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1911 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1912 | } |
| 1913 | and_(dst, src2); |
| 1914 | } |
| 1915 | |
| 1916 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1917 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1918 | if (constant->value() == 0) { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1919 | Set(dst, 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1920 | } else if (dst.is(src)) { |
| 1921 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1922 | Register constant_reg = GetSmiConstant(constant); |
| 1923 | and_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1924 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1925 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1926 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1927 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1928 | } |
| 1929 | |
| 1930 | |
| 1931 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1932 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1933 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1934 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1935 | } |
| 1936 | or_(dst, src2); |
| 1937 | } |
| 1938 | |
| 1939 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1940 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1941 | if (dst.is(src)) { |
| 1942 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1943 | Register constant_reg = GetSmiConstant(constant); |
| 1944 | or_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1945 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1946 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1947 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1948 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1949 | } |
| 1950 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1951 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1952 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1953 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1954 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1955 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1956 | } |
| 1957 | xor_(dst, src2); |
| 1958 | } |
| 1959 | |
| 1960 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1961 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1962 | if (dst.is(src)) { |
| 1963 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1964 | Register constant_reg = GetSmiConstant(constant); |
| 1965 | xor_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1966 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1967 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1968 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1969 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1973 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1974 | Register src, |
| 1975 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1976 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1977 | if (shift_value > 0) { |
| 1978 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1979 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1980 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1981 | } else { |
| 1982 | UNIMPLEMENTED(); // Not used. |
| 1983 | } |
| 1984 | } |
| 1985 | } |
| 1986 | |
| 1987 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1988 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1989 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1990 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1991 | if (!dst.is(src)) { |
| 1992 | movq(dst, src); |
| 1993 | } |
| 1994 | if (shift_value > 0) { |
| 1995 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1996 | } |
| 1997 | } |
| 1998 | |
| 1999 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2000 | void MacroAssembler::SmiShiftLogicalRightConstant( |
| 2001 | Register dst, Register src, int shift_value, |
| 2002 | Label* on_not_smi_result, Label::Distance near_jump) { |
| 2003 | // Logic right shift interprets its result as an *unsigned* number. |
| 2004 | if (dst.is(src)) { |
| 2005 | UNIMPLEMENTED(); // Not used. |
| 2006 | } else { |
| 2007 | movq(dst, src); |
| 2008 | if (shift_value == 0) { |
| 2009 | testq(dst, dst); |
| 2010 | j(negative, on_not_smi_result, near_jump); |
| 2011 | } |
| 2012 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 2013 | shl(dst, Immediate(kSmiShift)); |
| 2014 | } |
| 2015 | } |
| 2016 | |
| 2017 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2018 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 2019 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 2020 | Register src2) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2021 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2022 | // Untag shift amount. |
| 2023 | if (!dst.is(src1)) { |
| 2024 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2025 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2026 | SmiToInteger32(rcx, src2); |
| 2027 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 2028 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2029 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2030 | } |
| 2031 | |
| 2032 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2033 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 2034 | Register src1, |
| 2035 | Register src2, |
| 2036 | Label* on_not_smi_result, |
| 2037 | Label::Distance near_jump) { |
| 2038 | ASSERT(!dst.is(kScratchRegister)); |
| 2039 | ASSERT(!src1.is(kScratchRegister)); |
| 2040 | ASSERT(!src2.is(kScratchRegister)); |
| 2041 | ASSERT(!dst.is(rcx)); |
| 2042 | // dst and src1 can be the same, because the one case that bails out |
| 2043 | // is a shift by 0, which leaves dst, and therefore src1, unchanged. |
| 2044 | if (src1.is(rcx) || src2.is(rcx)) { |
| 2045 | movq(kScratchRegister, rcx); |
| 2046 | } |
| 2047 | if (!dst.is(src1)) { |
| 2048 | movq(dst, src1); |
| 2049 | } |
| 2050 | SmiToInteger32(rcx, src2); |
| 2051 | orl(rcx, Immediate(kSmiShift)); |
| 2052 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
| 2053 | shl(dst, Immediate(kSmiShift)); |
| 2054 | testq(dst, dst); |
| 2055 | if (src1.is(rcx) || src2.is(rcx)) { |
| 2056 | Label positive_result; |
| 2057 | j(positive, &positive_result, Label::kNear); |
| 2058 | if (src1.is(rcx)) { |
| 2059 | movq(src1, kScratchRegister); |
| 2060 | } else { |
| 2061 | movq(src2, kScratchRegister); |
| 2062 | } |
| 2063 | jmp(on_not_smi_result, near_jump); |
| 2064 | bind(&positive_result); |
| 2065 | } else { |
| 2066 | // src2 was zero and src1 negative. |
| 2067 | j(negative, on_not_smi_result, near_jump); |
| 2068 | } |
| 2069 | } |
| 2070 | |
| 2071 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2072 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 2073 | Register src1, |
| 2074 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2075 | ASSERT(!dst.is(kScratchRegister)); |
| 2076 | ASSERT(!src1.is(kScratchRegister)); |
| 2077 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2078 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2079 | if (src1.is(rcx)) { |
| 2080 | movq(kScratchRegister, src1); |
| 2081 | } else if (src2.is(rcx)) { |
| 2082 | movq(kScratchRegister, src2); |
| 2083 | } |
| 2084 | if (!dst.is(src1)) { |
| 2085 | movq(dst, src1); |
| 2086 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2087 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2088 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2089 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2090 | shl(dst, Immediate(kSmiShift)); |
| 2091 | if (src1.is(rcx)) { |
| 2092 | movq(src1, kScratchRegister); |
| 2093 | } else if (src2.is(rcx)) { |
| 2094 | movq(src2, kScratchRegister); |
| 2095 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2096 | } |
| 2097 | |
| 2098 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2099 | void MacroAssembler::SelectNonSmi(Register dst, |
| 2100 | Register src1, |
| 2101 | Register src2, |
| 2102 | Label* on_not_smis, |
| 2103 | Label::Distance near_jump) { |
| 2104 | ASSERT(!dst.is(kScratchRegister)); |
| 2105 | ASSERT(!src1.is(kScratchRegister)); |
| 2106 | ASSERT(!src2.is(kScratchRegister)); |
| 2107 | ASSERT(!dst.is(src1)); |
| 2108 | ASSERT(!dst.is(src2)); |
| 2109 | // Both operands must not be smis. |
| 2110 | #ifdef DEBUG |
| 2111 | if (allow_stub_calls()) { // Check contains a stub call. |
| 2112 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 2113 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 2114 | } |
| 2115 | #endif |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2116 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2117 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 2118 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
| 2119 | and_(kScratchRegister, src1); |
| 2120 | testl(kScratchRegister, src2); |
| 2121 | // If non-zero then both are smis. |
| 2122 | j(not_zero, on_not_smis, near_jump); |
| 2123 | |
| 2124 | // Exactly one operand is a smi. |
| 2125 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 2126 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 2127 | subq(kScratchRegister, Immediate(1)); |
| 2128 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 2129 | movq(dst, src1); |
| 2130 | xor_(dst, src2); |
| 2131 | and_(dst, kScratchRegister); |
| 2132 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 2133 | xor_(dst, src1); |
| 2134 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
| 2135 | } |
| 2136 | |
| 2137 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2138 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 2139 | Register src, |
| 2140 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2141 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2142 | // There is a possible optimization if shift is in the range 60-63, but that |
| 2143 | // will (and must) never happen. |
| 2144 | if (!dst.is(src)) { |
| 2145 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2146 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2147 | if (shift < kSmiShift) { |
| 2148 | sar(dst, Immediate(kSmiShift - shift)); |
| 2149 | } else { |
| 2150 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2151 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2152 | return SmiIndex(dst, times_1); |
| 2153 | } |
| 2154 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2155 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 2156 | Register src, |
| 2157 | int shift) { |
| 2158 | // Register src holds a positive smi. |
| 2159 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2160 | if (!dst.is(src)) { |
| 2161 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2162 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2163 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2164 | if (shift < kSmiShift) { |
| 2165 | sar(dst, Immediate(kSmiShift - shift)); |
| 2166 | } else { |
| 2167 | shl(dst, Immediate(shift - kSmiShift)); |
| 2168 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2169 | return SmiIndex(dst, times_1); |
| 2170 | } |
| 2171 | |
| 2172 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2173 | void MacroAssembler::AddSmiField(Register dst, const Operand& src) { |
| 2174 | ASSERT_EQ(0, kSmiShift % kBitsPerByte); |
| 2175 | addl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 2176 | } |
| 2177 | |
| 2178 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2179 | void MacroAssembler::JumpIfNotString(Register object, |
| 2180 | Register object_map, |
| 2181 | Label* not_string, |
| 2182 | Label::Distance near_jump) { |
| 2183 | Condition is_smi = CheckSmi(object); |
| 2184 | j(is_smi, not_string, near_jump); |
| 2185 | CmpObjectType(object, FIRST_NONSTRING_TYPE, object_map); |
| 2186 | j(above_equal, not_string, near_jump); |
| 2187 | } |
| 2188 | |
| 2189 | |
| 2190 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings( |
| 2191 | Register first_object, |
| 2192 | Register second_object, |
| 2193 | Register scratch1, |
| 2194 | Register scratch2, |
| 2195 | Label* on_fail, |
| 2196 | Label::Distance near_jump) { |
| 2197 | // Check that both objects are not smis. |
| 2198 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 2199 | j(either_smi, on_fail, near_jump); |
| 2200 | |
| 2201 | // Load instance type for both strings. |
| 2202 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 2203 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 2204 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 2205 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 2206 | |
| 2207 | // Check that both are flat ascii strings. |
| 2208 | ASSERT(kNotStringTag != 0); |
| 2209 | const int kFlatAsciiStringMask = |
| 2210 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2211 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2212 | |
| 2213 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2214 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2215 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2216 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2217 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2218 | cmpl(scratch1, |
| 2219 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2220 | j(not_equal, on_fail, near_jump); |
| 2221 | } |
| 2222 | |
| 2223 | |
| 2224 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 2225 | Register instance_type, |
| 2226 | Register scratch, |
| 2227 | Label* failure, |
| 2228 | Label::Distance near_jump) { |
| 2229 | if (!scratch.is(instance_type)) { |
| 2230 | movl(scratch, instance_type); |
| 2231 | } |
| 2232 | |
| 2233 | const int kFlatAsciiStringMask = |
| 2234 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2235 | |
| 2236 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 2237 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 2238 | j(not_equal, failure, near_jump); |
| 2239 | } |
| 2240 | |
| 2241 | |
| 2242 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 2243 | Register first_object_instance_type, |
| 2244 | Register second_object_instance_type, |
| 2245 | Register scratch1, |
| 2246 | Register scratch2, |
| 2247 | Label* on_fail, |
| 2248 | Label::Distance near_jump) { |
| 2249 | // Load instance type for both strings. |
| 2250 | movq(scratch1, first_object_instance_type); |
| 2251 | movq(scratch2, second_object_instance_type); |
| 2252 | |
| 2253 | // Check that both are flat ascii strings. |
| 2254 | ASSERT(kNotStringTag != 0); |
| 2255 | const int kFlatAsciiStringMask = |
| 2256 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2257 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2258 | |
| 2259 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2260 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2261 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2262 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2263 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2264 | cmpl(scratch1, |
| 2265 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2266 | j(not_equal, on_fail, near_jump); |
| 2267 | } |
| 2268 | |
| 2269 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2270 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2271 | void MacroAssembler::Move(Register dst, Register src) { |
| 2272 | if (!dst.is(src)) { |
| 2273 | movq(dst, src); |
| 2274 | } |
| 2275 | } |
| 2276 | |
| 2277 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2278 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2279 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2280 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2281 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2282 | } else { |
| 2283 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 2284 | } |
| 2285 | } |
| 2286 | |
| 2287 | |
| 2288 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2289 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2290 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2291 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2292 | } else { |
| 2293 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2294 | movq(dst, kScratchRegister); |
| 2295 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2296 | } |
| 2297 | |
| 2298 | |
| 2299 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2300 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2301 | Cmp(dst, Smi::cast(*source)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2302 | } else { |
| 2303 | Move(kScratchRegister, source); |
| 2304 | cmpq(dst, kScratchRegister); |
| 2305 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2306 | } |
| 2307 | |
| 2308 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2309 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2310 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2311 | Cmp(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2312 | } else { |
| 2313 | ASSERT(source->IsHeapObject()); |
| 2314 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2315 | cmpq(dst, kScratchRegister); |
| 2316 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2320 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2321 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2322 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2323 | } else { |
| 2324 | ASSERT(source->IsHeapObject()); |
| 2325 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2326 | push(kScratchRegister); |
| 2327 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2328 | } |
| 2329 | |
| 2330 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2331 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2332 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 2333 | if (is_int32(smi)) { |
| 2334 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2335 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 2336 | Register constant = GetSmiConstant(source); |
| 2337 | push(constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2338 | } |
| 2339 | } |
| 2340 | |
| 2341 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2342 | void MacroAssembler::Drop(int stack_elements) { |
| 2343 | if (stack_elements > 0) { |
| 2344 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 2345 | } |
| 2346 | } |
| 2347 | |
| 2348 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2349 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 2350 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2351 | } |
| 2352 | |
| 2353 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2354 | void MacroAssembler::TestBit(const Operand& src, int bits) { |
| 2355 | int byte_offset = bits / kBitsPerByte; |
| 2356 | int bit_in_byte = bits & (kBitsPerByte - 1); |
| 2357 | testb(Operand(src, byte_offset), Immediate(1 << bit_in_byte)); |
| 2358 | } |
| 2359 | |
| 2360 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2361 | void MacroAssembler::Jump(ExternalReference ext) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2362 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2363 | jmp(kScratchRegister); |
| 2364 | } |
| 2365 | |
| 2366 | |
| 2367 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 2368 | movq(kScratchRegister, destination, rmode); |
| 2369 | jmp(kScratchRegister); |
| 2370 | } |
| 2371 | |
| 2372 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2373 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2374 | // TODO(X64): Inline this |
| 2375 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2376 | } |
| 2377 | |
| 2378 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2379 | int MacroAssembler::CallSize(ExternalReference ext) { |
| 2380 | // Opcode for call kScratchRegister is: Rex.B FF D4 (three bytes). |
| 2381 | const int kCallInstructionSize = 3; |
| 2382 | return LoadAddressSize(ext) + kCallInstructionSize; |
| 2383 | } |
| 2384 | |
| 2385 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2386 | void MacroAssembler::Call(ExternalReference ext) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2387 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2388 | int end_position = pc_offset() + CallSize(ext); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2389 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2390 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2391 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2392 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2393 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2394 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2399 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2400 | int end_position = pc_offset() + CallSize(destination, rmode); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2401 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2402 | movq(kScratchRegister, destination, rmode); |
| 2403 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2404 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2405 | CHECK_EQ(pc_offset(), end_position); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2406 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2407 | } |
| 2408 | |
| 2409 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2410 | void MacroAssembler::Call(Handle<Code> code_object, |
| 2411 | RelocInfo::Mode rmode, |
| 2412 | unsigned ast_id) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2413 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2414 | int end_position = pc_offset() + CallSize(code_object); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2415 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2416 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2417 | call(code_object, rmode, ast_id); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2418 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2419 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2420 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2421 | } |
| 2422 | |
| 2423 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2424 | void MacroAssembler::Pushad() { |
| 2425 | push(rax); |
| 2426 | push(rcx); |
| 2427 | push(rdx); |
| 2428 | push(rbx); |
| 2429 | // Not pushing rsp or rbp. |
| 2430 | push(rsi); |
| 2431 | push(rdi); |
| 2432 | push(r8); |
| 2433 | push(r9); |
| 2434 | // r10 is kScratchRegister. |
| 2435 | push(r11); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2436 | // r12 is kSmiConstantRegister. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2437 | // r13 is kRootRegister. |
| 2438 | push(r14); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2439 | push(r15); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2440 | STATIC_ASSERT(11 == kNumSafepointSavedRegisters); |
| 2441 | // Use lea for symmetry with Popad. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2442 | int sp_delta = |
| 2443 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2444 | lea(rsp, Operand(rsp, -sp_delta)); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2445 | } |
| 2446 | |
| 2447 | |
| 2448 | void MacroAssembler::Popad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2449 | // Popad must not change the flags, so use lea instead of addq. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2450 | int sp_delta = |
| 2451 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2452 | lea(rsp, Operand(rsp, sp_delta)); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2453 | pop(r15); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2454 | pop(r14); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2455 | pop(r11); |
| 2456 | pop(r9); |
| 2457 | pop(r8); |
| 2458 | pop(rdi); |
| 2459 | pop(rsi); |
| 2460 | pop(rbx); |
| 2461 | pop(rdx); |
| 2462 | pop(rcx); |
| 2463 | pop(rax); |
| 2464 | } |
| 2465 | |
| 2466 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2467 | void MacroAssembler::Dropad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2468 | addq(rsp, Immediate(kNumSafepointRegisters * kPointerSize)); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2469 | } |
| 2470 | |
| 2471 | |
| 2472 | // Order general registers are pushed by Pushad: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2473 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2474 | int MacroAssembler::kSafepointPushRegisterIndices[Register::kNumRegisters] = { |
| 2475 | 0, |
| 2476 | 1, |
| 2477 | 2, |
| 2478 | 3, |
| 2479 | -1, |
| 2480 | -1, |
| 2481 | 4, |
| 2482 | 5, |
| 2483 | 6, |
| 2484 | 7, |
| 2485 | -1, |
| 2486 | 8, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2487 | -1, |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2488 | -1, |
| 2489 | 9, |
| 2490 | 10 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2491 | }; |
| 2492 | |
| 2493 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2494 | void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Register src) { |
| 2495 | movq(SafepointRegisterSlot(dst), src); |
| 2496 | } |
| 2497 | |
| 2498 | |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 2499 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 2500 | movq(dst, SafepointRegisterSlot(src)); |
| 2501 | } |
| 2502 | |
| 2503 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2504 | Operand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 2505 | return Operand(rsp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 2506 | } |
| 2507 | |
| 2508 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2509 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 2510 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2511 | // Adjust this code if not the case. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2512 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 2513 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
| 2514 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 1 * kPointerSize); |
| 2515 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 2 * kPointerSize); |
| 2516 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 3 * kPointerSize); |
| 2517 | STATIC_ASSERT(StackHandlerConstants::kPCOffset == 4 * kPointerSize); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2518 | |
| 2519 | // The pc (return address) is already on TOS. This code pushes state, |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2520 | // frame pointer, context, and current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2521 | if (try_location == IN_JAVASCRIPT) { |
| 2522 | if (type == TRY_CATCH_HANDLER) { |
| 2523 | push(Immediate(StackHandler::TRY_CATCH)); |
| 2524 | } else { |
| 2525 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 2526 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2527 | push(rbp); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2528 | push(rsi); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2529 | } else { |
| 2530 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2531 | // The frame pointer does not point to a JS frame so we save NULL |
| 2532 | // for rbp. We expect the code throwing an exception to check rbp |
| 2533 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2534 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2535 | push(Immediate(0)); // NULL frame pointer. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2536 | Push(Smi::FromInt(0)); // No context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2537 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2538 | // Save the current handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2539 | Operand handler_operand = |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2540 | ExternalOperand(ExternalReference(Isolate::kHandlerAddress, isolate())); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2541 | push(handler_operand); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2542 | // Link this handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2543 | movq(handler_operand, rsp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2544 | } |
| 2545 | |
| 2546 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2547 | void MacroAssembler::PopTryHandler() { |
| 2548 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 2549 | // Unlink this handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2550 | Operand handler_operand = |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2551 | ExternalOperand(ExternalReference(Isolate::kHandlerAddress, isolate())); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2552 | pop(handler_operand); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2553 | // Remove the remaining fields. |
| 2554 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 2555 | } |
| 2556 | |
| 2557 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2558 | void MacroAssembler::Throw(Register value) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2559 | // Adjust this code if not the case. |
| 2560 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 2561 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
| 2562 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 1 * kPointerSize); |
| 2563 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 2 * kPointerSize); |
| 2564 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 3 * kPointerSize); |
| 2565 | STATIC_ASSERT(StackHandlerConstants::kPCOffset == 4 * kPointerSize); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2566 | // Keep thrown value in rax. |
| 2567 | if (!value.is(rax)) { |
| 2568 | movq(rax, value); |
| 2569 | } |
| 2570 | |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2571 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2572 | Operand handler_operand = ExternalOperand(handler_address); |
| 2573 | movq(rsp, handler_operand); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2574 | // get next in chain |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2575 | pop(handler_operand); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2576 | pop(rsi); // Context. |
| 2577 | pop(rbp); // Frame pointer. |
| 2578 | pop(rdx); // State. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2579 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2580 | // If the handler is a JS frame, restore the context to the frame. |
| 2581 | // (rdx == ENTRY) == (rbp == 0) == (rsi == 0), so we could test any |
| 2582 | // of them. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2583 | Label skip; |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2584 | cmpq(rdx, Immediate(StackHandler::ENTRY)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2585 | j(equal, &skip, Label::kNear); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2586 | movq(Operand(rbp, StandardFrameConstants::kContextOffset), rsi); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2587 | bind(&skip); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2588 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2589 | ret(0); |
| 2590 | } |
| 2591 | |
| 2592 | |
| 2593 | void MacroAssembler::ThrowUncatchable(UncatchableExceptionType type, |
| 2594 | Register value) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2595 | // Adjust this code if not the case. |
| 2596 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 2597 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
| 2598 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 1 * kPointerSize); |
| 2599 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 2 * kPointerSize); |
| 2600 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 3 * kPointerSize); |
| 2601 | STATIC_ASSERT(StackHandlerConstants::kPCOffset == 4 * kPointerSize); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2602 | // Keep thrown value in rax. |
| 2603 | if (!value.is(rax)) { |
| 2604 | movq(rax, value); |
| 2605 | } |
| 2606 | // Fetch top stack handler. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2607 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2608 | Load(rsp, handler_address); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2609 | |
| 2610 | // Unwind the handlers until the ENTRY handler is found. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2611 | Label loop, done; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2612 | bind(&loop); |
| 2613 | // Load the type of the current stack handler. |
| 2614 | const int kStateOffset = StackHandlerConstants::kStateOffset; |
| 2615 | cmpq(Operand(rsp, kStateOffset), Immediate(StackHandler::ENTRY)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2616 | j(equal, &done, Label::kNear); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2617 | // Fetch the next handler in the list. |
| 2618 | const int kNextOffset = StackHandlerConstants::kNextOffset; |
| 2619 | movq(rsp, Operand(rsp, kNextOffset)); |
| 2620 | jmp(&loop); |
| 2621 | bind(&done); |
| 2622 | |
| 2623 | // Set the top handler address to next handler past the current ENTRY handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2624 | Operand handler_operand = ExternalOperand(handler_address); |
| 2625 | pop(handler_operand); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2626 | |
| 2627 | if (type == OUT_OF_MEMORY) { |
| 2628 | // Set external caught exception to false. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2629 | ExternalReference external_caught( |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2630 | Isolate::kExternalCaughtExceptionAddress, isolate()); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2631 | Set(rax, static_cast<int64_t>(false)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2632 | Store(external_caught, rax); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2633 | |
| 2634 | // Set pending exception and rax to out of memory exception. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2635 | ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2636 | isolate()); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2637 | movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2638 | Store(pending_exception, rax); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2639 | } |
| 2640 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2641 | // Discard the context saved in the handler and clear the context pointer. |
| 2642 | pop(rdx); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2643 | Set(rsi, 0); |
| 2644 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2645 | pop(rbp); // Restore frame pointer. |
| 2646 | pop(rdx); // Discard state. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2647 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2648 | ret(0); |
| 2649 | } |
| 2650 | |
| 2651 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2652 | void MacroAssembler::Ret() { |
| 2653 | ret(0); |
| 2654 | } |
| 2655 | |
| 2656 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 2657 | void MacroAssembler::Ret(int bytes_dropped, Register scratch) { |
| 2658 | if (is_uint16(bytes_dropped)) { |
| 2659 | ret(bytes_dropped); |
| 2660 | } else { |
| 2661 | pop(scratch); |
| 2662 | addq(rsp, Immediate(bytes_dropped)); |
| 2663 | push(scratch); |
| 2664 | ret(0); |
| 2665 | } |
| 2666 | } |
| 2667 | |
| 2668 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2669 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2670 | fucomip(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 2671 | fstp(0); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2672 | } |
| 2673 | |
| 2674 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2675 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 2676 | InstanceType type, |
| 2677 | Register map) { |
| 2678 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2679 | CmpInstanceType(map, type); |
| 2680 | } |
| 2681 | |
| 2682 | |
| 2683 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 2684 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 2685 | Immediate(static_cast<int8_t>(type))); |
| 2686 | } |
| 2687 | |
| 2688 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2689 | void MacroAssembler::CheckFastElements(Register map, |
| 2690 | Label* fail, |
| 2691 | Label::Distance distance) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2692 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2693 | STATIC_ASSERT(FAST_ELEMENTS == 1); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2694 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2695 | Immediate(Map::kMaximumBitField2FastElementValue)); |
| 2696 | j(above, fail, distance); |
| 2697 | } |
| 2698 | |
| 2699 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2700 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 2701 | Label* fail, |
| 2702 | Label::Distance distance) { |
| 2703 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2704 | STATIC_ASSERT(FAST_ELEMENTS == 1); |
| 2705 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2706 | Immediate(Map::kMaximumBitField2FastSmiOnlyElementValue)); |
| 2707 | j(below_equal, fail, distance); |
| 2708 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2709 | Immediate(Map::kMaximumBitField2FastElementValue)); |
| 2710 | j(above, fail, distance); |
| 2711 | } |
| 2712 | |
| 2713 | |
| 2714 | void MacroAssembler::CheckFastSmiOnlyElements(Register map, |
| 2715 | Label* fail, |
| 2716 | Label::Distance distance) { |
| 2717 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2718 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2719 | Immediate(Map::kMaximumBitField2FastSmiOnlyElementValue)); |
| 2720 | j(above, fail, distance); |
| 2721 | } |
| 2722 | |
| 2723 | |
| 2724 | void MacroAssembler::StoreNumberToDoubleElements( |
| 2725 | Register maybe_number, |
| 2726 | Register elements, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2727 | Register index, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2728 | XMMRegister xmm_scratch, |
| 2729 | Label* fail) { |
| 2730 | Label smi_value, is_nan, maybe_nan, not_nan, have_double_value, done; |
| 2731 | |
| 2732 | JumpIfSmi(maybe_number, &smi_value, Label::kNear); |
| 2733 | |
| 2734 | CheckMap(maybe_number, |
| 2735 | isolate()->factory()->heap_number_map(), |
| 2736 | fail, |
| 2737 | DONT_DO_SMI_CHECK); |
| 2738 | |
| 2739 | // Double value, canonicalize NaN. |
| 2740 | uint32_t offset = HeapNumber::kValueOffset + sizeof(kHoleNanLower32); |
| 2741 | cmpl(FieldOperand(maybe_number, offset), |
| 2742 | Immediate(kNaNOrInfinityLowerBoundUpper32)); |
| 2743 | j(greater_equal, &maybe_nan, Label::kNear); |
| 2744 | |
| 2745 | bind(¬_nan); |
| 2746 | movsd(xmm_scratch, FieldOperand(maybe_number, HeapNumber::kValueOffset)); |
| 2747 | bind(&have_double_value); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2748 | movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2749 | xmm_scratch); |
| 2750 | jmp(&done); |
| 2751 | |
| 2752 | bind(&maybe_nan); |
| 2753 | // Could be NaN or Infinity. If fraction is not zero, it's NaN, otherwise |
| 2754 | // it's an Infinity, and the non-NaN code path applies. |
| 2755 | j(greater, &is_nan, Label::kNear); |
| 2756 | cmpl(FieldOperand(maybe_number, HeapNumber::kValueOffset), Immediate(0)); |
| 2757 | j(zero, ¬_nan); |
| 2758 | bind(&is_nan); |
| 2759 | // Convert all NaNs to the same canonical NaN value when they are stored in |
| 2760 | // the double array. |
| 2761 | Set(kScratchRegister, BitCast<uint64_t>( |
| 2762 | FixedDoubleArray::canonical_not_the_hole_nan_as_double())); |
| 2763 | movq(xmm_scratch, kScratchRegister); |
| 2764 | jmp(&have_double_value, Label::kNear); |
| 2765 | |
| 2766 | bind(&smi_value); |
| 2767 | // Value is a smi. convert to a double and store. |
| 2768 | // Preserve original value. |
| 2769 | SmiToInteger32(kScratchRegister, maybe_number); |
| 2770 | cvtlsi2sd(xmm_scratch, kScratchRegister); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2771 | movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2772 | xmm_scratch); |
| 2773 | bind(&done); |
| 2774 | } |
| 2775 | |
| 2776 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2777 | void MacroAssembler::CheckMap(Register obj, |
| 2778 | Handle<Map> map, |
| 2779 | Label* fail, |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2780 | SmiCheckType smi_check_type) { |
| 2781 | if (smi_check_type == DO_SMI_CHECK) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2782 | JumpIfSmi(obj, fail); |
| 2783 | } |
| 2784 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2785 | j(not_equal, fail); |
| 2786 | } |
| 2787 | |
| 2788 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2789 | void MacroAssembler::ClampUint8(Register reg) { |
| 2790 | Label done; |
| 2791 | testl(reg, Immediate(0xFFFFFF00)); |
| 2792 | j(zero, &done, Label::kNear); |
| 2793 | setcc(negative, reg); // 1 if negative, 0 if positive. |
| 2794 | decb(reg); // 0 if negative, 255 if positive. |
| 2795 | bind(&done); |
| 2796 | } |
| 2797 | |
| 2798 | |
| 2799 | void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
| 2800 | XMMRegister temp_xmm_reg, |
| 2801 | Register result_reg, |
| 2802 | Register temp_reg) { |
| 2803 | Label done; |
| 2804 | Set(result_reg, 0); |
| 2805 | xorps(temp_xmm_reg, temp_xmm_reg); |
| 2806 | ucomisd(input_reg, temp_xmm_reg); |
| 2807 | j(below, &done, Label::kNear); |
| 2808 | uint64_t one_half = BitCast<uint64_t, double>(0.5); |
| 2809 | Set(temp_reg, one_half); |
| 2810 | movq(temp_xmm_reg, temp_reg); |
| 2811 | addsd(temp_xmm_reg, input_reg); |
| 2812 | cvttsd2si(result_reg, temp_xmm_reg); |
| 2813 | testl(result_reg, Immediate(0xFFFFFF00)); |
| 2814 | j(zero, &done, Label::kNear); |
| 2815 | Set(result_reg, 255); |
| 2816 | bind(&done); |
| 2817 | } |
| 2818 | |
| 2819 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2820 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 2821 | Register descriptors) { |
| 2822 | movq(descriptors, FieldOperand(map, |
| 2823 | Map::kInstanceDescriptorsOrBitField3Offset)); |
| 2824 | Label not_smi; |
| 2825 | JumpIfNotSmi(descriptors, ¬_smi, Label::kNear); |
| 2826 | Move(descriptors, isolate()->factory()->empty_descriptor_array()); |
| 2827 | bind(¬_smi); |
| 2828 | } |
| 2829 | |
| 2830 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2831 | void MacroAssembler::DispatchMap(Register obj, |
| 2832 | Handle<Map> map, |
| 2833 | Handle<Code> success, |
| 2834 | SmiCheckType smi_check_type) { |
| 2835 | Label fail; |
| 2836 | if (smi_check_type == DO_SMI_CHECK) { |
| 2837 | JumpIfSmi(obj, &fail); |
| 2838 | } |
| 2839 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2840 | j(equal, success, RelocInfo::CODE_TARGET); |
| 2841 | |
| 2842 | bind(&fail); |
| 2843 | } |
| 2844 | |
| 2845 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2846 | void MacroAssembler::AbortIfNotNumber(Register object) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2847 | Label ok; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2848 | Condition is_smi = CheckSmi(object); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2849 | j(is_smi, &ok, Label::kNear); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2850 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2851 | isolate()->factory()->heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2852 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2853 | bind(&ok); |
| 2854 | } |
| 2855 | |
| 2856 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2857 | void MacroAssembler::AbortIfSmi(Register object) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2858 | Condition is_smi = CheckSmi(object); |
| 2859 | Assert(NegateCondition(is_smi), "Operand is a smi"); |
| 2860 | } |
| 2861 | |
| 2862 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2863 | void MacroAssembler::AbortIfNotSmi(Register object) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2864 | Condition is_smi = CheckSmi(object); |
| 2865 | Assert(is_smi, "Operand is not a smi"); |
| 2866 | } |
| 2867 | |
| 2868 | |
| 2869 | void MacroAssembler::AbortIfNotSmi(const Operand& object) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2870 | Condition is_smi = CheckSmi(object); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2871 | Assert(is_smi, "Operand is not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2872 | } |
| 2873 | |
| 2874 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2875 | void MacroAssembler::AbortIfNotString(Register object) { |
| 2876 | testb(object, Immediate(kSmiTagMask)); |
| 2877 | Assert(not_equal, "Operand is not a string"); |
| 2878 | push(object); |
| 2879 | movq(object, FieldOperand(object, HeapObject::kMapOffset)); |
| 2880 | CmpInstanceType(object, FIRST_NONSTRING_TYPE); |
| 2881 | pop(object); |
| 2882 | Assert(below, "Operand is not a string"); |
| 2883 | } |
| 2884 | |
| 2885 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 2886 | void MacroAssembler::AbortIfNotRootValue(Register src, |
| 2887 | Heap::RootListIndex root_value_index, |
| 2888 | const char* message) { |
| 2889 | ASSERT(!src.is(kScratchRegister)); |
| 2890 | LoadRoot(kScratchRegister, root_value_index); |
| 2891 | cmpq(src, kScratchRegister); |
| 2892 | Check(equal, message); |
| 2893 | } |
| 2894 | |
| 2895 | |
| 2896 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2897 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 2898 | Register map, |
| 2899 | Register instance_type) { |
| 2900 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2901 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2902 | STATIC_ASSERT(kNotStringTag != 0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2903 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 2904 | return zero; |
| 2905 | } |
| 2906 | |
| 2907 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2908 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 2909 | Register result, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2910 | Label* miss, |
| 2911 | bool miss_on_bound_function) { |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2912 | // Check that the receiver isn't a smi. |
| 2913 | testl(function, Immediate(kSmiTagMask)); |
| 2914 | j(zero, miss); |
| 2915 | |
| 2916 | // Check that the function really is a function. |
| 2917 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 2918 | j(not_equal, miss); |
| 2919 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 2920 | if (miss_on_bound_function) { |
| 2921 | movq(kScratchRegister, |
| 2922 | FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 2923 | // It's not smi-tagged (stored in the top half of a smi-tagged 8-byte |
| 2924 | // field). |
| 2925 | TestBit(FieldOperand(kScratchRegister, |
| 2926 | SharedFunctionInfo::kCompilerHintsOffset), |
| 2927 | SharedFunctionInfo::kBoundFunction); |
| 2928 | j(not_zero, miss); |
| 2929 | } |
| 2930 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2931 | // Make sure that the function has an instance prototype. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2932 | Label non_instance; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2933 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 2934 | Immediate(1 << Map::kHasNonInstancePrototype)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2935 | j(not_zero, &non_instance, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2936 | |
| 2937 | // Get the prototype or initial map from the function. |
| 2938 | movq(result, |
| 2939 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2940 | |
| 2941 | // If the prototype or initial map is the hole, don't return it and |
| 2942 | // simply miss the cache instead. This will allow us to allocate a |
| 2943 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2944 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2945 | j(equal, miss); |
| 2946 | |
| 2947 | // If the function does not have an initial map, we're done. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2948 | Label done; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2949 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2950 | j(not_equal, &done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2951 | |
| 2952 | // Get the prototype from the initial map. |
| 2953 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2954 | jmp(&done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2955 | |
| 2956 | // Non-instance prototype: Fetch prototype from constructor field |
| 2957 | // in initial map. |
| 2958 | bind(&non_instance); |
| 2959 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 2960 | |
| 2961 | // All done. |
| 2962 | bind(&done); |
| 2963 | } |
| 2964 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2965 | |
| 2966 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 2967 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2968 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2969 | movl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2970 | } |
| 2971 | } |
| 2972 | |
| 2973 | |
| 2974 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 2975 | ASSERT(value > 0); |
| 2976 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2977 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2978 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2979 | incl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2980 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2981 | addl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2982 | } |
| 2983 | } |
| 2984 | } |
| 2985 | |
| 2986 | |
| 2987 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 2988 | ASSERT(value > 0); |
| 2989 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2990 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2991 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2992 | decl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2993 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2994 | subl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2995 | } |
| 2996 | } |
| 2997 | } |
| 2998 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 2999 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3000 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3001 | void MacroAssembler::DebugBreak() { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 3002 | Set(rax, 0); // No arguments. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3003 | LoadAddress(rbx, ExternalReference(Runtime::kDebugBreak, isolate())); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3004 | CEntryStub ces(1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3005 | ASSERT(AllowThisStubCall(&ces)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3006 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3007 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3008 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3009 | |
| 3010 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3011 | void MacroAssembler::SetCallKind(Register dst, CallKind call_kind) { |
| 3012 | // This macro takes the dst register to make the code more readable |
| 3013 | // at the call sites. However, the dst register has to be rcx to |
| 3014 | // follow the calling convention which requires the call type to be |
| 3015 | // in rcx. |
| 3016 | ASSERT(dst.is(rcx)); |
| 3017 | if (call_kind == CALL_AS_FUNCTION) { |
| 3018 | LoadSmiConstant(dst, Smi::FromInt(1)); |
| 3019 | } else { |
| 3020 | LoadSmiConstant(dst, Smi::FromInt(0)); |
| 3021 | } |
| 3022 | } |
| 3023 | |
| 3024 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3025 | void MacroAssembler::InvokeCode(Register code, |
| 3026 | const ParameterCount& expected, |
| 3027 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3028 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3029 | const CallWrapper& call_wrapper, |
| 3030 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3031 | // You can't call a function without a valid frame. |
| 3032 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3033 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3034 | Label done; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3035 | InvokePrologue(expected, |
| 3036 | actual, |
| 3037 | Handle<Code>::null(), |
| 3038 | code, |
| 3039 | &done, |
| 3040 | flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3041 | Label::kNear, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3042 | call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3043 | call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3044 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3045 | call_wrapper.BeforeCall(CallSize(code)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3046 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3047 | call(code); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3048 | call_wrapper.AfterCall(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3049 | } else { |
| 3050 | ASSERT(flag == JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3051 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3052 | jmp(code); |
| 3053 | } |
| 3054 | bind(&done); |
| 3055 | } |
| 3056 | |
| 3057 | |
| 3058 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 3059 | const ParameterCount& expected, |
| 3060 | const ParameterCount& actual, |
| 3061 | RelocInfo::Mode rmode, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3062 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3063 | const CallWrapper& call_wrapper, |
| 3064 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3065 | // You can't call a function without a valid frame. |
| 3066 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3067 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3068 | Label done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3069 | Register dummy = rax; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3070 | InvokePrologue(expected, |
| 3071 | actual, |
| 3072 | code, |
| 3073 | dummy, |
| 3074 | &done, |
| 3075 | flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3076 | Label::kNear, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3077 | call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3078 | call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3079 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3080 | call_wrapper.BeforeCall(CallSize(code)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3081 | SetCallKind(rcx, call_kind); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3082 | Call(code, rmode); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3083 | call_wrapper.AfterCall(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3084 | } else { |
| 3085 | ASSERT(flag == JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3086 | SetCallKind(rcx, call_kind); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3087 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3088 | } |
| 3089 | bind(&done); |
| 3090 | } |
| 3091 | |
| 3092 | |
| 3093 | void MacroAssembler::InvokeFunction(Register function, |
| 3094 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3095 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3096 | const CallWrapper& call_wrapper, |
| 3097 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3098 | // You can't call a function without a valid frame. |
| 3099 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3100 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3101 | ASSERT(function.is(rdi)); |
| 3102 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 3103 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3104 | movsxlq(rbx, |
| 3105 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 3106 | // Advances rdx to the end of the Code object header, to the start of |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3107 | // the executable code. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 3108 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3109 | |
| 3110 | ParameterCount expected(rbx); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3111 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3112 | } |
| 3113 | |
| 3114 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3115 | void MacroAssembler::InvokeFunction(JSFunction* function, |
| 3116 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3117 | InvokeFlag flag, |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 3118 | const CallWrapper& call_wrapper, |
| 3119 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3120 | // You can't call a function without a valid frame. |
| 3121 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3122 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3123 | // Get the function and setup the context. |
| 3124 | Move(rdi, Handle<JSFunction>(function)); |
| 3125 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 3126 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame^] | 3127 | // We call indirectly through the code field in the function to |
| 3128 | // allow recompilation to take effect without changing any of the |
| 3129 | // call sites. |
| 3130 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
| 3131 | ParameterCount expected(function->shared()->formal_parameter_count()); |
| 3132 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3133 | } |
| 3134 | |
| 3135 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3136 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 3137 | const ParameterCount& actual, |
| 3138 | Handle<Code> code_constant, |
| 3139 | Register code_register, |
| 3140 | Label* done, |
| 3141 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3142 | Label::Distance near_jump, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3143 | const CallWrapper& call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3144 | CallKind call_kind) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3145 | bool definitely_matches = false; |
| 3146 | Label invoke; |
| 3147 | if (expected.is_immediate()) { |
| 3148 | ASSERT(actual.is_immediate()); |
| 3149 | if (expected.immediate() == actual.immediate()) { |
| 3150 | definitely_matches = true; |
| 3151 | } else { |
| 3152 | Set(rax, actual.immediate()); |
| 3153 | if (expected.immediate() == |
| 3154 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| 3155 | // Don't worry about adapting arguments for built-ins that |
| 3156 | // don't want that done. Skip adaption code by making it look |
| 3157 | // like we have a match between expected and actual number of |
| 3158 | // arguments. |
| 3159 | definitely_matches = true; |
| 3160 | } else { |
| 3161 | Set(rbx, expected.immediate()); |
| 3162 | } |
| 3163 | } |
| 3164 | } else { |
| 3165 | if (actual.is_immediate()) { |
| 3166 | // Expected is in register, actual is immediate. This is the |
| 3167 | // case when we invoke function values without going through the |
| 3168 | // IC mechanism. |
| 3169 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 3170 | j(equal, &invoke, Label::kNear); |
| 3171 | ASSERT(expected.reg().is(rbx)); |
| 3172 | Set(rax, actual.immediate()); |
| 3173 | } else if (!expected.reg().is(actual.reg())) { |
| 3174 | // Both expected and actual are in (different) registers. This |
| 3175 | // is the case when we invoke functions using call and apply. |
| 3176 | cmpq(expected.reg(), actual.reg()); |
| 3177 | j(equal, &invoke, Label::kNear); |
| 3178 | ASSERT(actual.reg().is(rax)); |
| 3179 | ASSERT(expected.reg().is(rbx)); |
| 3180 | } |
| 3181 | } |
| 3182 | |
| 3183 | if (!definitely_matches) { |
| 3184 | Handle<Code> adaptor = isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| 3185 | if (!code_constant.is_null()) { |
| 3186 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 3187 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 3188 | } else if (!code_register.is(rdx)) { |
| 3189 | movq(rdx, code_register); |
| 3190 | } |
| 3191 | |
| 3192 | if (flag == CALL_FUNCTION) { |
| 3193 | call_wrapper.BeforeCall(CallSize(adaptor)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3194 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3195 | Call(adaptor, RelocInfo::CODE_TARGET); |
| 3196 | call_wrapper.AfterCall(); |
| 3197 | jmp(done, near_jump); |
| 3198 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3199 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3200 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 3201 | } |
| 3202 | bind(&invoke); |
| 3203 | } |
| 3204 | } |
| 3205 | |
| 3206 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3207 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 3208 | push(rbp); |
| 3209 | movq(rbp, rsp); |
| 3210 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3211 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3212 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 3213 | push(kScratchRegister); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3214 | if (emit_debug_code()) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3215 | movq(kScratchRegister, |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3216 | isolate()->factory()->undefined_value(), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3217 | RelocInfo::EMBEDDED_OBJECT); |
| 3218 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 3219 | Check(not_equal, "code object not properly patched"); |
| 3220 | } |
| 3221 | } |
| 3222 | |
| 3223 | |
| 3224 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3225 | if (emit_debug_code()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3226 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3227 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 3228 | Check(equal, "stack frame types must match"); |
| 3229 | } |
| 3230 | movq(rsp, rbp); |
| 3231 | pop(rbp); |
| 3232 | } |
| 3233 | |
| 3234 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3235 | void MacroAssembler::EnterExitFramePrologue(bool save_rax) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3236 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3237 | // All constants are relative to the frame pointer of the exit frame. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3238 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 3239 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 3240 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 3241 | push(rbp); |
| 3242 | movq(rbp, rsp); |
| 3243 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3244 | // Reserve room for entry stack pointer and push the code object. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3245 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3246 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 3247 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 3248 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3249 | |
| 3250 | // Save the frame pointer and the context in top. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3251 | if (save_rax) { |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3252 | movq(r14, rax); // Backup rax in callee-save register. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3253 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3254 | |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3255 | Store(ExternalReference(Isolate::kCEntryFPAddress, isolate()), rbp); |
| 3256 | Store(ExternalReference(Isolate::kContextAddress, isolate()), rsi); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3257 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3258 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3259 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3260 | void MacroAssembler::EnterExitFrameEpilogue(int arg_stack_space, |
| 3261 | bool save_doubles) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3262 | #ifdef _WIN64 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3263 | const int kShadowSpace = 4; |
| 3264 | arg_stack_space += kShadowSpace; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3265 | #endif |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3266 | // Optionally save all XMM registers. |
| 3267 | if (save_doubles) { |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3268 | int space = XMMRegister::kNumRegisters * kDoubleSize + |
| 3269 | arg_stack_space * kPointerSize; |
| 3270 | subq(rsp, Immediate(space)); |
| 3271 | int offset = -2 * kPointerSize; |
| 3272 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3273 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3274 | movsd(Operand(rbp, offset - ((i + 1) * kDoubleSize)), reg); |
| 3275 | } |
| 3276 | } else if (arg_stack_space > 0) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3277 | subq(rsp, Immediate(arg_stack_space * kPointerSize)); |
| 3278 | } |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3279 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3280 | // Get the required frame alignment for the OS. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3281 | const int kFrameAlignment = OS::ActivationFrameAlignment(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3282 | if (kFrameAlignment > 0) { |
| 3283 | ASSERT(IsPowerOf2(kFrameAlignment)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 3284 | ASSERT(is_int8(kFrameAlignment)); |
| 3285 | and_(rsp, Immediate(-kFrameAlignment)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3286 | } |
| 3287 | |
| 3288 | // Patch the saved entry sp. |
| 3289 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 3290 | } |
| 3291 | |
| 3292 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3293 | void MacroAssembler::EnterExitFrame(int arg_stack_space, bool save_doubles) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3294 | EnterExitFramePrologue(true); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3295 | |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3296 | // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3297 | // so it must be retained across the C-call. |
| 3298 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3299 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3300 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3301 | EnterExitFrameEpilogue(arg_stack_space, save_doubles); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3302 | } |
| 3303 | |
| 3304 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3305 | void MacroAssembler::EnterApiExitFrame(int arg_stack_space) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3306 | EnterExitFramePrologue(false); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3307 | EnterExitFrameEpilogue(arg_stack_space, false); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3308 | } |
| 3309 | |
| 3310 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3311 | void MacroAssembler::LeaveExitFrame(bool save_doubles) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3312 | // Registers: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3313 | // r15 : argv |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3314 | if (save_doubles) { |
| 3315 | int offset = -2 * kPointerSize; |
| 3316 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3317 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3318 | movsd(reg, Operand(rbp, offset - ((i + 1) * kDoubleSize))); |
| 3319 | } |
| 3320 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3321 | // Get the return address from the stack and restore the frame pointer. |
| 3322 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 3323 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 3324 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3325 | // Drop everything up to and including the arguments and the receiver |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3326 | // from the caller stack. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3327 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3328 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3329 | // Push the return address to get ready to return. |
| 3330 | push(rcx); |
| 3331 | |
| 3332 | LeaveExitFrameEpilogue(); |
| 3333 | } |
| 3334 | |
| 3335 | |
| 3336 | void MacroAssembler::LeaveApiExitFrame() { |
| 3337 | movq(rsp, rbp); |
| 3338 | pop(rbp); |
| 3339 | |
| 3340 | LeaveExitFrameEpilogue(); |
| 3341 | } |
| 3342 | |
| 3343 | |
| 3344 | void MacroAssembler::LeaveExitFrameEpilogue() { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3345 | // Restore current context from top and clear it in debug mode. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3346 | ExternalReference context_address(Isolate::kContextAddress, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3347 | Operand context_operand = ExternalOperand(context_address); |
| 3348 | movq(rsi, context_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3349 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3350 | movq(context_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3351 | #endif |
| 3352 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3353 | // Clear the top frame. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3354 | ExternalReference c_entry_fp_address(Isolate::kCEntryFPAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3355 | isolate()); |
| 3356 | Operand c_entry_fp_operand = ExternalOperand(c_entry_fp_address); |
| 3357 | movq(c_entry_fp_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3358 | } |
| 3359 | |
| 3360 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3361 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 3362 | Register scratch, |
| 3363 | Label* miss) { |
| 3364 | Label same_contexts; |
| 3365 | |
| 3366 | ASSERT(!holder_reg.is(scratch)); |
| 3367 | ASSERT(!scratch.is(kScratchRegister)); |
| 3368 | // Load current lexical context from the stack frame. |
| 3369 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 3370 | |
| 3371 | // When generating debug code, make sure the lexical context is set. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3372 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3373 | cmpq(scratch, Immediate(0)); |
| 3374 | Check(not_equal, "we should not have an empty lexical context"); |
| 3375 | } |
| 3376 | // Load the global context of the current context. |
| 3377 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 3378 | movq(scratch, FieldOperand(scratch, offset)); |
| 3379 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 3380 | |
| 3381 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3382 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3383 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3384 | isolate()->factory()->global_context_map()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3385 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3386 | } |
| 3387 | |
| 3388 | // Check if both contexts are the same. |
| 3389 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 3390 | j(equal, &same_contexts); |
| 3391 | |
| 3392 | // Compare security tokens. |
| 3393 | // Check that the security token in the calling global object is |
| 3394 | // compatible with the security token in the receiving global |
| 3395 | // object. |
| 3396 | |
| 3397 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3398 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3399 | // Preserve original value of holder_reg. |
| 3400 | push(holder_reg); |
| 3401 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3402 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3403 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 3404 | |
| 3405 | // Read the first word and compare to global_context_map(), |
| 3406 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3407 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3408 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3409 | pop(holder_reg); |
| 3410 | } |
| 3411 | |
| 3412 | movq(kScratchRegister, |
| 3413 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3414 | int token_offset = |
| 3415 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3416 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 3417 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 3418 | j(not_equal, miss); |
| 3419 | |
| 3420 | bind(&same_contexts); |
| 3421 | } |
| 3422 | |
| 3423 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3424 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 3425 | Register elements, |
| 3426 | Register key, |
| 3427 | Register r0, |
| 3428 | Register r1, |
| 3429 | Register r2, |
| 3430 | Register result) { |
| 3431 | // Register use: |
| 3432 | // |
| 3433 | // elements - holds the slow-case elements of the receiver on entry. |
| 3434 | // Unchanged unless 'result' is the same register. |
| 3435 | // |
| 3436 | // key - holds the smi key on entry. |
| 3437 | // Unchanged unless 'result' is the same register. |
| 3438 | // |
| 3439 | // Scratch registers: |
| 3440 | // |
| 3441 | // r0 - holds the untagged key on entry and holds the hash once computed. |
| 3442 | // |
| 3443 | // r1 - used to hold the capacity mask of the dictionary |
| 3444 | // |
| 3445 | // r2 - used for the index into the dictionary. |
| 3446 | // |
| 3447 | // result - holds the result on exit if the load succeeded. |
| 3448 | // Allowed to be the same as 'key' or 'result'. |
| 3449 | // Unchanged on bailout so 'key' or 'result' can be used |
| 3450 | // in further computation. |
| 3451 | |
| 3452 | Label done; |
| 3453 | |
| 3454 | // Compute the hash code from the untagged key. This must be kept in sync |
| 3455 | // with ComputeIntegerHash in utils.h. |
| 3456 | // |
| 3457 | // hash = ~hash + (hash << 15); |
| 3458 | movl(r1, r0); |
| 3459 | notl(r0); |
| 3460 | shll(r1, Immediate(15)); |
| 3461 | addl(r0, r1); |
| 3462 | // hash = hash ^ (hash >> 12); |
| 3463 | movl(r1, r0); |
| 3464 | shrl(r1, Immediate(12)); |
| 3465 | xorl(r0, r1); |
| 3466 | // hash = hash + (hash << 2); |
| 3467 | leal(r0, Operand(r0, r0, times_4, 0)); |
| 3468 | // hash = hash ^ (hash >> 4); |
| 3469 | movl(r1, r0); |
| 3470 | shrl(r1, Immediate(4)); |
| 3471 | xorl(r0, r1); |
| 3472 | // hash = hash * 2057; |
| 3473 | imull(r0, r0, Immediate(2057)); |
| 3474 | // hash = hash ^ (hash >> 16); |
| 3475 | movl(r1, r0); |
| 3476 | shrl(r1, Immediate(16)); |
| 3477 | xorl(r0, r1); |
| 3478 | |
| 3479 | // Compute capacity mask. |
| 3480 | SmiToInteger32(r1, |
| 3481 | FieldOperand(elements, NumberDictionary::kCapacityOffset)); |
| 3482 | decl(r1); |
| 3483 | |
| 3484 | // Generate an unrolled loop that performs a few probes before giving up. |
| 3485 | const int kProbes = 4; |
| 3486 | for (int i = 0; i < kProbes; i++) { |
| 3487 | // Use r2 for index calculations and keep the hash intact in r0. |
| 3488 | movq(r2, r0); |
| 3489 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3490 | if (i > 0) { |
| 3491 | addl(r2, Immediate(NumberDictionary::GetProbeOffset(i))); |
| 3492 | } |
| 3493 | and_(r2, r1); |
| 3494 | |
| 3495 | // Scale the index by multiplying by the entry size. |
| 3496 | ASSERT(NumberDictionary::kEntrySize == 3); |
| 3497 | lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3 |
| 3498 | |
| 3499 | // Check if the key matches. |
| 3500 | cmpq(key, FieldOperand(elements, |
| 3501 | r2, |
| 3502 | times_pointer_size, |
| 3503 | NumberDictionary::kElementsStartOffset)); |
| 3504 | if (i != (kProbes - 1)) { |
| 3505 | j(equal, &done); |
| 3506 | } else { |
| 3507 | j(not_equal, miss); |
| 3508 | } |
| 3509 | } |
| 3510 | |
| 3511 | bind(&done); |
| 3512 | // Check that the value is a normal propety. |
| 3513 | const int kDetailsOffset = |
| 3514 | NumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
| 3515 | ASSERT_EQ(NORMAL, 0); |
| 3516 | Test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset), |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3517 | Smi::FromInt(PropertyDetails::TypeField::kMask)); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3518 | j(not_zero, miss); |
| 3519 | |
| 3520 | // Get the value at the masked, scaled index. |
| 3521 | const int kValueOffset = |
| 3522 | NumberDictionary::kElementsStartOffset + kPointerSize; |
| 3523 | movq(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset)); |
| 3524 | } |
| 3525 | |
| 3526 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3527 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3528 | Register scratch, |
| 3529 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3530 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3531 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3532 | |
| 3533 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3534 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3535 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3536 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3537 | #ifdef DEBUG |
| 3538 | // Assert that result actually contains top on entry. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3539 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
| 3540 | cmpq(result, top_operand); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3541 | Check(equal, "Unexpected allocation top"); |
| 3542 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3543 | return; |
| 3544 | } |
| 3545 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3546 | // Move address of new object to result. Use scratch register if available, |
| 3547 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 3548 | if (scratch.is_valid()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3549 | LoadAddress(scratch, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3550 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3551 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3552 | Load(result, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3553 | } |
| 3554 | } |
| 3555 | |
| 3556 | |
| 3557 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 3558 | Register scratch) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3559 | if (emit_debug_code()) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3560 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 3561 | Check(zero, "Unaligned allocation in new space"); |
| 3562 | } |
| 3563 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3564 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3565 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3566 | |
| 3567 | // Update new top. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3568 | if (scratch.is_valid()) { |
| 3569 | // Scratch already contains address of allocation top. |
| 3570 | movq(Operand(scratch, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3571 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3572 | Store(new_space_allocation_top, result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3573 | } |
| 3574 | } |
| 3575 | |
| 3576 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3577 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 3578 | Register result, |
| 3579 | Register result_end, |
| 3580 | Register scratch, |
| 3581 | Label* gc_required, |
| 3582 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3583 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3584 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3585 | // Trash the registers to simulate an allocation failure. |
| 3586 | movl(result, Immediate(0x7091)); |
| 3587 | if (result_end.is_valid()) { |
| 3588 | movl(result_end, Immediate(0x7191)); |
| 3589 | } |
| 3590 | if (scratch.is_valid()) { |
| 3591 | movl(scratch, Immediate(0x7291)); |
| 3592 | } |
| 3593 | } |
| 3594 | jmp(gc_required); |
| 3595 | return; |
| 3596 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3597 | ASSERT(!result.is(result_end)); |
| 3598 | |
| 3599 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3600 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3601 | |
| 3602 | // Calculate new top and bail out if new space is exhausted. |
| 3603 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3604 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3605 | |
| 3606 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 3607 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3608 | if (!top_reg.is(result)) { |
| 3609 | movq(top_reg, result); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3610 | } |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3611 | addq(top_reg, Immediate(object_size)); |
| 3612 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3613 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3614 | cmpq(top_reg, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3615 | j(above, gc_required); |
| 3616 | |
| 3617 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3618 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3619 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3620 | if (top_reg.is(result)) { |
| 3621 | if ((flags & TAG_OBJECT) != 0) { |
| 3622 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 3623 | } else { |
| 3624 | subq(result, Immediate(object_size)); |
| 3625 | } |
| 3626 | } else if ((flags & TAG_OBJECT) != 0) { |
| 3627 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3628 | addq(result, Immediate(kHeapObjectTag)); |
| 3629 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3630 | } |
| 3631 | |
| 3632 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3633 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 3634 | ScaleFactor element_size, |
| 3635 | Register element_count, |
| 3636 | Register result, |
| 3637 | Register result_end, |
| 3638 | Register scratch, |
| 3639 | Label* gc_required, |
| 3640 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3641 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3642 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3643 | // Trash the registers to simulate an allocation failure. |
| 3644 | movl(result, Immediate(0x7091)); |
| 3645 | movl(result_end, Immediate(0x7191)); |
| 3646 | if (scratch.is_valid()) { |
| 3647 | movl(scratch, Immediate(0x7291)); |
| 3648 | } |
| 3649 | // Register element_count is not modified by the function. |
| 3650 | } |
| 3651 | jmp(gc_required); |
| 3652 | return; |
| 3653 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3654 | ASSERT(!result.is(result_end)); |
| 3655 | |
| 3656 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3657 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3658 | |
| 3659 | // Calculate new top and bail out if new space is exhausted. |
| 3660 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3661 | ExternalReference::new_space_allocation_limit_address(isolate()); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3662 | |
| 3663 | // We assume that element_count*element_size + header_size does not |
| 3664 | // overflow. |
| 3665 | lea(result_end, Operand(element_count, element_size, header_size)); |
| 3666 | addq(result_end, result); |
| 3667 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3668 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3669 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3670 | j(above, gc_required); |
| 3671 | |
| 3672 | // Update allocation top. |
| 3673 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3674 | |
| 3675 | // Tag the result if requested. |
| 3676 | if ((flags & TAG_OBJECT) != 0) { |
| 3677 | addq(result, Immediate(kHeapObjectTag)); |
| 3678 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3679 | } |
| 3680 | |
| 3681 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3682 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 3683 | Register result, |
| 3684 | Register result_end, |
| 3685 | Register scratch, |
| 3686 | Label* gc_required, |
| 3687 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3688 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3689 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3690 | // Trash the registers to simulate an allocation failure. |
| 3691 | movl(result, Immediate(0x7091)); |
| 3692 | movl(result_end, Immediate(0x7191)); |
| 3693 | if (scratch.is_valid()) { |
| 3694 | movl(scratch, Immediate(0x7291)); |
| 3695 | } |
| 3696 | // object_size is left unchanged by this function. |
| 3697 | } |
| 3698 | jmp(gc_required); |
| 3699 | return; |
| 3700 | } |
| 3701 | ASSERT(!result.is(result_end)); |
| 3702 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3703 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3704 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3705 | |
| 3706 | // Calculate new top and bail out if new space is exhausted. |
| 3707 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3708 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3709 | if (!object_size.is(result_end)) { |
| 3710 | movq(result_end, object_size); |
| 3711 | } |
| 3712 | addq(result_end, result); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3713 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3714 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3715 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3716 | j(above, gc_required); |
| 3717 | |
| 3718 | // Update allocation top. |
| 3719 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3720 | |
| 3721 | // Tag the result if requested. |
| 3722 | if ((flags & TAG_OBJECT) != 0) { |
| 3723 | addq(result, Immediate(kHeapObjectTag)); |
| 3724 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3725 | } |
| 3726 | |
| 3727 | |
| 3728 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 3729 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3730 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3731 | |
| 3732 | // Make sure the object has no tag before resetting top. |
| 3733 | and_(object, Immediate(~kHeapObjectTagMask)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3734 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3735 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3736 | cmpq(object, top_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3737 | Check(below, "Undo allocation of non allocated memory"); |
| 3738 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3739 | movq(top_operand, object); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3740 | } |
| 3741 | |
| 3742 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3743 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3744 | Register scratch, |
| 3745 | Label* gc_required) { |
| 3746 | // Allocate heap number in new space. |
| 3747 | AllocateInNewSpace(HeapNumber::kSize, |
| 3748 | result, |
| 3749 | scratch, |
| 3750 | no_reg, |
| 3751 | gc_required, |
| 3752 | TAG_OBJECT); |
| 3753 | |
| 3754 | // Set the map. |
| 3755 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 3756 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3757 | } |
| 3758 | |
| 3759 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3760 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 3761 | Register length, |
| 3762 | Register scratch1, |
| 3763 | Register scratch2, |
| 3764 | Register scratch3, |
| 3765 | Label* gc_required) { |
| 3766 | // Calculate the number of bytes needed for the characters in the string while |
| 3767 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3768 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 3769 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3770 | ASSERT(kShortSize == 2); |
| 3771 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3772 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 3773 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3774 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3775 | if (kHeaderAlignment > 0) { |
| 3776 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3777 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3778 | |
| 3779 | // Allocate two byte string in new space. |
| 3780 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 3781 | times_1, |
| 3782 | scratch1, |
| 3783 | result, |
| 3784 | scratch2, |
| 3785 | scratch3, |
| 3786 | gc_required, |
| 3787 | TAG_OBJECT); |
| 3788 | |
| 3789 | // Set the map, length and hash field. |
| 3790 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 3791 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3792 | Integer32ToSmi(scratch1, length); |
| 3793 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3794 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3795 | Immediate(String::kEmptyHashField)); |
| 3796 | } |
| 3797 | |
| 3798 | |
| 3799 | void MacroAssembler::AllocateAsciiString(Register result, |
| 3800 | Register length, |
| 3801 | Register scratch1, |
| 3802 | Register scratch2, |
| 3803 | Register scratch3, |
| 3804 | Label* gc_required) { |
| 3805 | // Calculate the number of bytes needed for the characters in the string while |
| 3806 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3807 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 3808 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3809 | movl(scratch1, length); |
| 3810 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3811 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3812 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3813 | if (kHeaderAlignment > 0) { |
| 3814 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3815 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3816 | |
| 3817 | // Allocate ascii string in new space. |
| 3818 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 3819 | times_1, |
| 3820 | scratch1, |
| 3821 | result, |
| 3822 | scratch2, |
| 3823 | scratch3, |
| 3824 | gc_required, |
| 3825 | TAG_OBJECT); |
| 3826 | |
| 3827 | // Set the map, length and hash field. |
| 3828 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 3829 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3830 | Integer32ToSmi(scratch1, length); |
| 3831 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3832 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3833 | Immediate(String::kEmptyHashField)); |
| 3834 | } |
| 3835 | |
| 3836 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3837 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3838 | Register scratch1, |
| 3839 | Register scratch2, |
| 3840 | Label* gc_required) { |
| 3841 | // Allocate heap number in new space. |
| 3842 | AllocateInNewSpace(ConsString::kSize, |
| 3843 | result, |
| 3844 | scratch1, |
| 3845 | scratch2, |
| 3846 | gc_required, |
| 3847 | TAG_OBJECT); |
| 3848 | |
| 3849 | // Set the map. The other fields are left uninitialized. |
| 3850 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 3851 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3852 | } |
| 3853 | |
| 3854 | |
| 3855 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 3856 | Register scratch1, |
| 3857 | Register scratch2, |
| 3858 | Label* gc_required) { |
| 3859 | // Allocate heap number in new space. |
| 3860 | AllocateInNewSpace(ConsString::kSize, |
| 3861 | result, |
| 3862 | scratch1, |
| 3863 | scratch2, |
| 3864 | gc_required, |
| 3865 | TAG_OBJECT); |
| 3866 | |
| 3867 | // Set the map. The other fields are left uninitialized. |
| 3868 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 3869 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3870 | } |
| 3871 | |
| 3872 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3873 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 3874 | Register scratch1, |
| 3875 | Register scratch2, |
| 3876 | Label* gc_required) { |
| 3877 | // Allocate heap number in new space. |
| 3878 | AllocateInNewSpace(SlicedString::kSize, |
| 3879 | result, |
| 3880 | scratch1, |
| 3881 | scratch2, |
| 3882 | gc_required, |
| 3883 | TAG_OBJECT); |
| 3884 | |
| 3885 | // Set the map. The other fields are left uninitialized. |
| 3886 | LoadRoot(kScratchRegister, Heap::kSlicedStringMapRootIndex); |
| 3887 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3888 | } |
| 3889 | |
| 3890 | |
| 3891 | void MacroAssembler::AllocateAsciiSlicedString(Register result, |
| 3892 | Register scratch1, |
| 3893 | Register scratch2, |
| 3894 | Label* gc_required) { |
| 3895 | // Allocate heap number in new space. |
| 3896 | AllocateInNewSpace(SlicedString::kSize, |
| 3897 | result, |
| 3898 | scratch1, |
| 3899 | scratch2, |
| 3900 | gc_required, |
| 3901 | TAG_OBJECT); |
| 3902 | |
| 3903 | // Set the map. The other fields are left uninitialized. |
| 3904 | LoadRoot(kScratchRegister, Heap::kSlicedAsciiStringMapRootIndex); |
| 3905 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3906 | } |
| 3907 | |
| 3908 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 3909 | // Copy memory, byte-by-byte, from source to destination. Not optimized for |
| 3910 | // long or aligned copies. The contents of scratch and length are destroyed. |
| 3911 | // Destination is incremented by length, source, length and scratch are |
| 3912 | // clobbered. |
| 3913 | // A simpler loop is faster on small copies, but slower on large ones. |
| 3914 | // The cld() instruction must have been emitted, to set the direction flag(), |
| 3915 | // before calling this function. |
| 3916 | void MacroAssembler::CopyBytes(Register destination, |
| 3917 | Register source, |
| 3918 | Register length, |
| 3919 | int min_length, |
| 3920 | Register scratch) { |
| 3921 | ASSERT(min_length >= 0); |
| 3922 | if (FLAG_debug_code) { |
| 3923 | cmpl(length, Immediate(min_length)); |
| 3924 | Assert(greater_equal, "Invalid min_length"); |
| 3925 | } |
| 3926 | Label loop, done, short_string, short_loop; |
| 3927 | |
| 3928 | const int kLongStringLimit = 20; |
| 3929 | if (min_length <= kLongStringLimit) { |
| 3930 | cmpl(length, Immediate(kLongStringLimit)); |
| 3931 | j(less_equal, &short_string); |
| 3932 | } |
| 3933 | |
| 3934 | ASSERT(source.is(rsi)); |
| 3935 | ASSERT(destination.is(rdi)); |
| 3936 | ASSERT(length.is(rcx)); |
| 3937 | |
| 3938 | // Because source is 8-byte aligned in our uses of this function, |
| 3939 | // we keep source aligned for the rep movs operation by copying the odd bytes |
| 3940 | // at the end of the ranges. |
| 3941 | movq(scratch, length); |
| 3942 | shrl(length, Immediate(3)); |
| 3943 | repmovsq(); |
| 3944 | // Move remaining bytes of length. |
| 3945 | andl(scratch, Immediate(0x7)); |
| 3946 | movq(length, Operand(source, scratch, times_1, -8)); |
| 3947 | movq(Operand(destination, scratch, times_1, -8), length); |
| 3948 | addq(destination, scratch); |
| 3949 | |
| 3950 | if (min_length <= kLongStringLimit) { |
| 3951 | jmp(&done); |
| 3952 | |
| 3953 | bind(&short_string); |
| 3954 | if (min_length == 0) { |
| 3955 | testl(length, length); |
| 3956 | j(zero, &done); |
| 3957 | } |
| 3958 | lea(scratch, Operand(destination, length, times_1, 0)); |
| 3959 | |
| 3960 | bind(&short_loop); |
| 3961 | movb(length, Operand(source, 0)); |
| 3962 | movb(Operand(destination, 0), length); |
| 3963 | incq(source); |
| 3964 | incq(destination); |
| 3965 | cmpq(destination, scratch); |
| 3966 | j(not_equal, &short_loop); |
| 3967 | |
| 3968 | bind(&done); |
| 3969 | } |
| 3970 | } |
| 3971 | |
| 3972 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3973 | void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| 3974 | Register end_offset, |
| 3975 | Register filler) { |
| 3976 | Label loop, entry; |
| 3977 | jmp(&entry); |
| 3978 | bind(&loop); |
| 3979 | movq(Operand(start_offset, 0), filler); |
| 3980 | addq(start_offset, Immediate(kPointerSize)); |
| 3981 | bind(&entry); |
| 3982 | cmpq(start_offset, end_offset); |
| 3983 | j(less, &loop); |
| 3984 | } |
| 3985 | |
| 3986 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3987 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 3988 | if (context_chain_length > 0) { |
| 3989 | // Move up the chain of contexts to the context containing the slot. |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 3990 | movq(dst, Operand(rsi, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3991 | for (int i = 1; i < context_chain_length; i++) { |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 3992 | movq(dst, Operand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3993 | } |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 3994 | } else { |
| 3995 | // Slot is in the current function context. Move it into the |
| 3996 | // destination register in case we store into it (the write barrier |
| 3997 | // cannot be allowed to destroy the context in rsi). |
| 3998 | movq(dst, rsi); |
| 3999 | } |
| 4000 | |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 4001 | // We should not have found a with context by walking the context |
| 4002 | // chain (i.e., the static scope chain and runtime context chain do |
| 4003 | // not agree). A variable occurring in such a scope should have |
| 4004 | // slot type LOOKUP and not CONTEXT. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4005 | if (emit_debug_code()) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 4006 | CompareRoot(FieldOperand(dst, HeapObject::kMapOffset), |
| 4007 | Heap::kWithContextMapRootIndex); |
| 4008 | Check(not_equal, "Variable resolved to with context."); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4009 | } |
| 4010 | } |
| 4011 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4012 | #ifdef _WIN64 |
| 4013 | static const int kRegisterPassedArguments = 4; |
| 4014 | #else |
| 4015 | static const int kRegisterPassedArguments = 6; |
| 4016 | #endif |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4017 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 4018 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| 4019 | // Load the global or builtins object from the current context. |
| 4020 | movq(function, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 4021 | // Load the global context from the global or builtins object. |
| 4022 | movq(function, FieldOperand(function, GlobalObject::kGlobalContextOffset)); |
| 4023 | // Load the function from the global context. |
| 4024 | movq(function, Operand(function, Context::SlotOffset(index))); |
| 4025 | } |
| 4026 | |
| 4027 | |
| 4028 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 4029 | Register map) { |
| 4030 | // Load the initial map. The global functions all have initial maps. |
| 4031 | movq(map, FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4032 | if (emit_debug_code()) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 4033 | Label ok, fail; |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 4034 | CheckMap(map, isolate()->factory()->meta_map(), &fail, DO_SMI_CHECK); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 4035 | jmp(&ok); |
| 4036 | bind(&fail); |
| 4037 | Abort("Global functions must have initial map"); |
| 4038 | bind(&ok); |
| 4039 | } |
| 4040 | } |
| 4041 | |
| 4042 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4043 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4044 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 4045 | // including the ones passed in registers, and space is always allocated for |
| 4046 | // the four register arguments even if the function takes fewer than four |
| 4047 | // arguments. |
| 4048 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 4049 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4050 | ASSERT(num_arguments >= 0); |
| 4051 | #ifdef _WIN64 |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4052 | const int kMinimumStackSlots = kRegisterPassedArguments; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4053 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 4054 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4055 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4056 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 4057 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4058 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4059 | } |
| 4060 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4061 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4062 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 4063 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 4064 | ASSERT(frame_alignment != 0); |
| 4065 | ASSERT(num_arguments >= 0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4066 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4067 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 4068 | movq(kScratchRegister, rsp); |
| 4069 | ASSERT(IsPowerOf2(frame_alignment)); |
| 4070 | int argument_slots_on_stack = |
| 4071 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 4072 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 4073 | and_(rsp, Immediate(-frame_alignment)); |
| 4074 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 4075 | } |
| 4076 | |
| 4077 | |
| 4078 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 4079 | int num_arguments) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4080 | LoadAddress(rax, function); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4081 | CallCFunction(rax, num_arguments); |
| 4082 | } |
| 4083 | |
| 4084 | |
| 4085 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4086 | ASSERT(has_frame()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4087 | // Check stack alignment. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4088 | if (emit_debug_code()) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4089 | CheckStackAlignment(); |
| 4090 | } |
| 4091 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4092 | call(function); |
| 4093 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 4094 | ASSERT(num_arguments >= 0); |
| 4095 | int argument_slots_on_stack = |
| 4096 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 4097 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 4098 | } |
| 4099 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4100 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4101 | bool AreAliased(Register r1, Register r2, Register r3, Register r4) { |
| 4102 | if (r1.is(r2)) return true; |
| 4103 | if (r1.is(r3)) return true; |
| 4104 | if (r1.is(r4)) return true; |
| 4105 | if (r2.is(r3)) return true; |
| 4106 | if (r2.is(r4)) return true; |
| 4107 | if (r3.is(r4)) return true; |
| 4108 | return false; |
| 4109 | } |
| 4110 | |
| 4111 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 4112 | CodePatcher::CodePatcher(byte* address, int size) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 4113 | : address_(address), |
| 4114 | size_(size), |
| 4115 | masm_(Isolate::Current(), address, size + Assembler::kGap) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 4116 | // Create a new macro assembler pointing to the address of the code to patch. |
| 4117 | // The size is adjusted with kGap on order for the assembler to generate size |
| 4118 | // bytes of instructions without failing with buffer size constraints. |
| 4119 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 4120 | } |
| 4121 | |
| 4122 | |
| 4123 | CodePatcher::~CodePatcher() { |
| 4124 | // Indicate that code has changed. |
| 4125 | CPU::FlushICache(address_, size_); |
| 4126 | |
| 4127 | // Check that the code was patched as expected. |
| 4128 | ASSERT(masm_.pc_ == address_ + size_); |
| 4129 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 4130 | } |
| 4131 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4132 | |
| 4133 | void MacroAssembler::CheckPageFlag( |
| 4134 | Register object, |
| 4135 | Register scratch, |
| 4136 | int mask, |
| 4137 | Condition cc, |
| 4138 | Label* condition_met, |
| 4139 | Label::Distance condition_met_distance) { |
| 4140 | ASSERT(cc == zero || cc == not_zero); |
| 4141 | if (scratch.is(object)) { |
| 4142 | and_(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4143 | } else { |
| 4144 | movq(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4145 | and_(scratch, object); |
| 4146 | } |
| 4147 | if (mask < (1 << kBitsPerByte)) { |
| 4148 | testb(Operand(scratch, MemoryChunk::kFlagsOffset), |
| 4149 | Immediate(static_cast<uint8_t>(mask))); |
| 4150 | } else { |
| 4151 | testl(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(mask)); |
| 4152 | } |
| 4153 | j(cc, condition_met, condition_met_distance); |
| 4154 | } |
| 4155 | |
| 4156 | |
| 4157 | void MacroAssembler::JumpIfBlack(Register object, |
| 4158 | Register bitmap_scratch, |
| 4159 | Register mask_scratch, |
| 4160 | Label* on_black, |
| 4161 | Label::Distance on_black_distance) { |
| 4162 | ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, rcx)); |
| 4163 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 4164 | |
| 4165 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 4166 | // The mask_scratch register contains a 1 at the position of the first bit |
| 4167 | // and a 0 at all other positions, including the position of the second bit. |
| 4168 | movq(rcx, mask_scratch); |
| 4169 | // Make rcx into a mask that covers both marking bits using the operation |
| 4170 | // rcx = mask | (mask << 1). |
| 4171 | lea(rcx, Operand(mask_scratch, mask_scratch, times_2, 0)); |
| 4172 | // Note that we are using a 4-byte aligned 8-byte load. |
| 4173 | and_(rcx, Operand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 4174 | cmpq(mask_scratch, rcx); |
| 4175 | j(equal, on_black, on_black_distance); |
| 4176 | } |
| 4177 | |
| 4178 | |
| 4179 | // Detect some, but not all, common pointer-free objects. This is used by the |
| 4180 | // incremental write barrier which doesn't care about oddballs (they are always |
| 4181 | // marked black immediately so this code is not hit). |
| 4182 | void MacroAssembler::JumpIfDataObject( |
| 4183 | Register value, |
| 4184 | Register scratch, |
| 4185 | Label* not_data_object, |
| 4186 | Label::Distance not_data_object_distance) { |
| 4187 | Label is_data_object; |
| 4188 | movq(scratch, FieldOperand(value, HeapObject::kMapOffset)); |
| 4189 | CompareRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| 4190 | j(equal, &is_data_object, Label::kNear); |
| 4191 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 4192 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 4193 | // If it's a string and it's not a cons string then it's an object containing |
| 4194 | // no GC pointers. |
| 4195 | testb(FieldOperand(scratch, Map::kInstanceTypeOffset), |
| 4196 | Immediate(kIsIndirectStringMask | kIsNotStringMask)); |
| 4197 | j(not_zero, not_data_object, not_data_object_distance); |
| 4198 | bind(&is_data_object); |
| 4199 | } |
| 4200 | |
| 4201 | |
| 4202 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 4203 | Register bitmap_reg, |
| 4204 | Register mask_reg) { |
| 4205 | ASSERT(!AreAliased(addr_reg, bitmap_reg, mask_reg, rcx)); |
| 4206 | movq(bitmap_reg, addr_reg); |
| 4207 | // Sign extended 32 bit immediate. |
| 4208 | and_(bitmap_reg, Immediate(~Page::kPageAlignmentMask)); |
| 4209 | movq(rcx, addr_reg); |
| 4210 | int shift = |
| 4211 | Bitmap::kBitsPerCellLog2 + kPointerSizeLog2 - Bitmap::kBytesPerCellLog2; |
| 4212 | shrl(rcx, Immediate(shift)); |
| 4213 | and_(rcx, |
| 4214 | Immediate((Page::kPageAlignmentMask >> shift) & |
| 4215 | ~(Bitmap::kBytesPerCell - 1))); |
| 4216 | |
| 4217 | addq(bitmap_reg, rcx); |
| 4218 | movq(rcx, addr_reg); |
| 4219 | shrl(rcx, Immediate(kPointerSizeLog2)); |
| 4220 | and_(rcx, Immediate((1 << Bitmap::kBitsPerCellLog2) - 1)); |
| 4221 | movl(mask_reg, Immediate(1)); |
| 4222 | shl_cl(mask_reg); |
| 4223 | } |
| 4224 | |
| 4225 | |
| 4226 | void MacroAssembler::EnsureNotWhite( |
| 4227 | Register value, |
| 4228 | Register bitmap_scratch, |
| 4229 | Register mask_scratch, |
| 4230 | Label* value_is_white_and_not_data, |
| 4231 | Label::Distance distance) { |
| 4232 | ASSERT(!AreAliased(value, bitmap_scratch, mask_scratch, rcx)); |
| 4233 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 4234 | |
| 4235 | // If the value is black or grey we don't need to do anything. |
| 4236 | ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
| 4237 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 4238 | ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0); |
| 4239 | ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
| 4240 | |
| 4241 | Label done; |
| 4242 | |
| 4243 | // Since both black and grey have a 1 in the first position and white does |
| 4244 | // not have a 1 there we only need to check one bit. |
| 4245 | testq(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4246 | j(not_zero, &done, Label::kNear); |
| 4247 | |
| 4248 | if (FLAG_debug_code) { |
| 4249 | // Check for impossible bit pattern. |
| 4250 | Label ok; |
| 4251 | push(mask_scratch); |
| 4252 | // shl. May overflow making the check conservative. |
| 4253 | addq(mask_scratch, mask_scratch); |
| 4254 | testq(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4255 | j(zero, &ok, Label::kNear); |
| 4256 | int3(); |
| 4257 | bind(&ok); |
| 4258 | pop(mask_scratch); |
| 4259 | } |
| 4260 | |
| 4261 | // Value is white. We check whether it is data that doesn't need scanning. |
| 4262 | // Currently only checks for HeapNumber and non-cons strings. |
| 4263 | Register map = rcx; // Holds map while checking type. |
| 4264 | Register length = rcx; // Holds length of object after checking type. |
| 4265 | Label not_heap_number; |
| 4266 | Label is_data_object; |
| 4267 | |
| 4268 | // Check for heap-number |
| 4269 | movq(map, FieldOperand(value, HeapObject::kMapOffset)); |
| 4270 | CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| 4271 | j(not_equal, ¬_heap_number, Label::kNear); |
| 4272 | movq(length, Immediate(HeapNumber::kSize)); |
| 4273 | jmp(&is_data_object, Label::kNear); |
| 4274 | |
| 4275 | bind(¬_heap_number); |
| 4276 | // Check for strings. |
| 4277 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 4278 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 4279 | // If it's a string and it's not a cons string then it's an object containing |
| 4280 | // no GC pointers. |
| 4281 | Register instance_type = rcx; |
| 4282 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 4283 | testb(instance_type, Immediate(kIsIndirectStringMask | kIsNotStringMask)); |
| 4284 | j(not_zero, value_is_white_and_not_data); |
| 4285 | // It's a non-indirect (non-cons and non-slice) string. |
| 4286 | // If it's external, the length is just ExternalString::kSize. |
| 4287 | // Otherwise it's String::kHeaderSize + string->length() * (1 or 2). |
| 4288 | Label not_external; |
| 4289 | // External strings are the only ones with the kExternalStringTag bit |
| 4290 | // set. |
| 4291 | ASSERT_EQ(0, kSeqStringTag & kExternalStringTag); |
| 4292 | ASSERT_EQ(0, kConsStringTag & kExternalStringTag); |
| 4293 | testb(instance_type, Immediate(kExternalStringTag)); |
| 4294 | j(zero, ¬_external, Label::kNear); |
| 4295 | movq(length, Immediate(ExternalString::kSize)); |
| 4296 | jmp(&is_data_object, Label::kNear); |
| 4297 | |
| 4298 | bind(¬_external); |
| 4299 | // Sequential string, either ASCII or UC16. |
| 4300 | ASSERT(kAsciiStringTag == 0x04); |
| 4301 | and_(length, Immediate(kStringEncodingMask)); |
| 4302 | xor_(length, Immediate(kStringEncodingMask)); |
| 4303 | addq(length, Immediate(0x04)); |
| 4304 | // Value now either 4 (if ASCII) or 8 (if UC16), i.e. char-size shifted by 2. |
| 4305 | imul(length, FieldOperand(value, String::kLengthOffset)); |
| 4306 | shr(length, Immediate(2 + kSmiTagSize + kSmiShiftSize)); |
| 4307 | addq(length, Immediate(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| 4308 | and_(length, Immediate(~kObjectAlignmentMask)); |
| 4309 | |
| 4310 | bind(&is_data_object); |
| 4311 | // Value is a data object, and it is white. Mark it black. Since we know |
| 4312 | // that the object is white we can make it black by flipping one bit. |
| 4313 | or_(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4314 | |
| 4315 | and_(bitmap_scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4316 | addl(Operand(bitmap_scratch, MemoryChunk::kLiveBytesOffset), length); |
| 4317 | |
| 4318 | bind(&done); |
| 4319 | } |
| 4320 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4321 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 4322 | |
| 4323 | #endif // V8_TARGET_ARCH_X64 |