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 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 533 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 534 | ASSERT(allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe()); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 535 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 536 | } |
| 537 | |
| 538 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 539 | void MacroAssembler::StubReturn(int argc) { |
| 540 | ASSERT(argc >= 1 && generating_stub()); |
| 541 | ret((argc - 1) * kPointerSize); |
| 542 | } |
| 543 | |
| 544 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 545 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
| 546 | if (!has_frame_ && stub->SometimesSetsUpAFrame()) return false; |
| 547 | return allow_stub_calls_ || stub->CompilingCallsToThisStubIsGCSafe(); |
| 548 | } |
| 549 | |
| 550 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 551 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 552 | if (num_arguments > 0) { |
| 553 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 554 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 555 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 559 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 560 | // The assert checks that the constants for the maximum number of digits |
| 561 | // for an array index cached in the hash field and the number of bits |
| 562 | // reserved for it does not conflict. |
| 563 | ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| 564 | (1 << String::kArrayIndexValueBits)); |
| 565 | // We want the smi-tagged index in key. Even if we subsequently go to |
| 566 | // the slow case, converting the key to a smi is always valid. |
| 567 | // key: string key |
| 568 | // hash: key's hash field, including its array index value. |
| 569 | and_(hash, Immediate(String::kArrayIndexValueMask)); |
| 570 | shr(hash, Immediate(String::kHashShift)); |
| 571 | // Here we actually clobber the key which will be used if calling into |
| 572 | // runtime later. However as the new key is the numeric value of a string key |
| 573 | // there is no difference in using either key. |
| 574 | Integer32ToSmi(index, hash); |
| 575 | } |
| 576 | |
| 577 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 578 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 579 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 580 | } |
| 581 | |
| 582 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 583 | void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 584 | const Runtime::Function* function = Runtime::FunctionForId(id); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 585 | Set(rax, function->nargs); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 586 | LoadAddress(rbx, ExternalReference(function, isolate())); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 587 | CEntryStub ces(1, kSaveFPRegs); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 588 | CallStub(&ces); |
| 589 | } |
| 590 | |
| 591 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 592 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
| 593 | int num_arguments) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 594 | // If the expected number of arguments of the runtime function is |
| 595 | // constant, we check that the actual number of arguments match the |
| 596 | // expectation. |
| 597 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 598 | IllegalOperation(num_arguments); |
| 599 | return; |
| 600 | } |
| 601 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 602 | // TODO(1236192): Most runtime routines don't need the number of |
| 603 | // arguments passed in because it is constant. At some point we |
| 604 | // should remove this need and make the runtime routine entry code |
| 605 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 606 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 607 | LoadAddress(rbx, ExternalReference(f, isolate())); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 608 | CEntryStub ces(f->result_size); |
| 609 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 610 | } |
| 611 | |
| 612 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 613 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 614 | int num_arguments) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 615 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 616 | LoadAddress(rbx, ext); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 617 | |
| 618 | CEntryStub stub(1); |
| 619 | CallStub(&stub); |
| 620 | } |
| 621 | |
| 622 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 623 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 624 | int num_arguments, |
| 625 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 626 | // ----------- S t a t e ------------- |
| 627 | // -- rsp[0] : return address |
| 628 | // -- rsp[8] : argument num_arguments - 1 |
| 629 | // ... |
| 630 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 631 | // ----------------------------------- |
| 632 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 633 | // TODO(1236192): Most runtime routines don't need the number of |
| 634 | // arguments passed in because it is constant. At some point we |
| 635 | // should remove this need and make the runtime routine entry code |
| 636 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 637 | Set(rax, num_arguments); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 638 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 642 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 643 | int num_arguments, |
| 644 | int result_size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 645 | TailCallExternalReference(ExternalReference(fid, isolate()), |
| 646 | num_arguments, |
| 647 | result_size); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 651 | static int Offset(ExternalReference ref0, ExternalReference ref1) { |
| 652 | int64_t offset = (ref0.address() - ref1.address()); |
| 653 | // Check that fits into int. |
| 654 | ASSERT(static_cast<int>(offset) == offset); |
| 655 | return static_cast<int>(offset); |
| 656 | } |
| 657 | |
| 658 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 659 | void MacroAssembler::PrepareCallApiFunction(int arg_stack_space) { |
| 660 | #ifdef _WIN64 |
| 661 | // We need to prepare a slot for result handle on stack and put |
| 662 | // a pointer to it into 1st arg register. |
| 663 | EnterApiExitFrame(arg_stack_space + 1); |
| 664 | |
| 665 | // rcx must be used to pass the pointer to the return value slot. |
| 666 | lea(rcx, StackSpaceOperand(arg_stack_space)); |
| 667 | #else |
| 668 | EnterApiExitFrame(arg_stack_space); |
| 669 | #endif |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 673 | void MacroAssembler::CallApiFunctionAndReturn(Address function_address, |
| 674 | int stack_space) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 675 | Label empty_result; |
| 676 | Label prologue; |
| 677 | Label promote_scheduled_exception; |
| 678 | Label delete_allocated_handles; |
| 679 | Label leave_exit_frame; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 680 | Label write_back; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 681 | |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 682 | Factory* factory = isolate()->factory(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 683 | ExternalReference next_address = |
| 684 | ExternalReference::handle_scope_next_address(); |
| 685 | const int kNextOffset = 0; |
| 686 | const int kLimitOffset = Offset( |
| 687 | ExternalReference::handle_scope_limit_address(), |
| 688 | next_address); |
| 689 | const int kLevelOffset = Offset( |
| 690 | ExternalReference::handle_scope_level_address(), |
| 691 | next_address); |
| 692 | ExternalReference scheduled_exception_address = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 693 | ExternalReference::scheduled_exception_address(isolate()); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 694 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 695 | // Allocate HandleScope in callee-save registers. |
| 696 | Register prev_next_address_reg = r14; |
| 697 | Register prev_limit_reg = rbx; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 698 | Register base_reg = r15; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 699 | movq(base_reg, next_address); |
| 700 | movq(prev_next_address_reg, Operand(base_reg, kNextOffset)); |
| 701 | movq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 702 | addl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 703 | // Call the api function! |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 704 | movq(rax, reinterpret_cast<int64_t>(function_address), |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 705 | RelocInfo::RUNTIME_ENTRY); |
| 706 | call(rax); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 707 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 708 | #ifdef _WIN64 |
| 709 | // rax keeps a pointer to v8::Handle, unpack it. |
| 710 | movq(rax, Operand(rax, 0)); |
| 711 | #endif |
| 712 | // Check if the result handle holds 0. |
| 713 | testq(rax, rax); |
| 714 | j(zero, &empty_result); |
| 715 | // It was non-zero. Dereference to get the result value. |
| 716 | movq(rax, Operand(rax, 0)); |
| 717 | bind(&prologue); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 718 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 719 | // No more valid handles (the result handle was the last one). Restore |
| 720 | // previous handle scope. |
| 721 | subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 722 | movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
| 723 | cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 724 | j(not_equal, &delete_allocated_handles); |
| 725 | bind(&leave_exit_frame); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 726 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 727 | // Check if the function scheduled an exception. |
| 728 | movq(rsi, scheduled_exception_address); |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 729 | Cmp(Operand(rsi, 0), factory->the_hole_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 730 | j(not_equal, &promote_scheduled_exception); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 731 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 732 | LeaveApiExitFrame(); |
| 733 | ret(stack_space * kPointerSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 734 | |
| 735 | bind(&promote_scheduled_exception); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 736 | TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 737 | |
| 738 | bind(&empty_result); |
| 739 | // It was zero; the result is undefined. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 740 | Move(rax, factory->undefined_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 741 | jmp(&prologue); |
| 742 | |
| 743 | // HandleScope limit has changed. Delete allocated extensions. |
| 744 | bind(&delete_allocated_handles); |
| 745 | movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
| 746 | movq(prev_limit_reg, rax); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 747 | #ifdef _WIN64 |
| 748 | LoadAddress(rcx, ExternalReference::isolate_address()); |
| 749 | #else |
| 750 | LoadAddress(rdi, ExternalReference::isolate_address()); |
| 751 | #endif |
| 752 | LoadAddress(rax, |
| 753 | ExternalReference::delete_handle_scope_extensions(isolate())); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 754 | call(rax); |
| 755 | movq(rax, prev_limit_reg); |
| 756 | jmp(&leave_exit_frame); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 757 | } |
| 758 | |
| 759 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 760 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 761 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 762 | // 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] | 763 | LoadAddress(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 764 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 765 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 766 | } |
| 767 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 768 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 769 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, |
| 770 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 771 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 772 | // You can't call a builtin without a valid frame. |
| 773 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 774 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 775 | // Rely on the assertion to check that the number of provided |
| 776 | // arguments match the expected number of arguments. Fake a |
| 777 | // parameter count to avoid emitting code to do the check. |
| 778 | ParameterCount expected(0); |
| 779 | GetBuiltinEntry(rdx, id); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 780 | InvokeCode(rdx, expected, expected, flag, call_wrapper, CALL_AS_METHOD); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 781 | } |
| 782 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 783 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 784 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 785 | Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 786 | // Load the builtins object into target register. |
| 787 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 788 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 789 | movq(target, FieldOperand(target, |
| 790 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 791 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 792 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 793 | |
| 794 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 795 | ASSERT(!target.is(rdi)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 796 | // Load the JavaScript builtin function from the builtins object. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 797 | GetBuiltinFunction(rdi, id); |
| 798 | movq(target, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 802 | static const Register saved_regs[] = |
| 803 | { rax, rcx, rdx, rbx, rbp, rsi, rdi, r8, r9, r10, r11 }; |
| 804 | static const int kNumberOfSavedRegs = sizeof(saved_regs) / sizeof(Register); |
| 805 | |
| 806 | |
| 807 | void MacroAssembler::PushCallerSaved(SaveFPRegsMode fp_mode, |
| 808 | Register exclusion1, |
| 809 | Register exclusion2, |
| 810 | Register exclusion3) { |
| 811 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 812 | // store the registers in any particular way, but we do have to store and |
| 813 | // restore them. |
| 814 | for (int i = 0; i < kNumberOfSavedRegs; i++) { |
| 815 | Register reg = saved_regs[i]; |
| 816 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 817 | push(reg); |
| 818 | } |
| 819 | } |
| 820 | // R12 to r15 are callee save on all platforms. |
| 821 | if (fp_mode == kSaveFPRegs) { |
| 822 | CpuFeatures::Scope scope(SSE2); |
| 823 | subq(rsp, Immediate(kDoubleSize * XMMRegister::kNumRegisters)); |
| 824 | for (int i = 0; i < XMMRegister::kNumRegisters; i++) { |
| 825 | XMMRegister reg = XMMRegister::from_code(i); |
| 826 | movsd(Operand(rsp, i * kDoubleSize), reg); |
| 827 | } |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | |
| 832 | void MacroAssembler::PopCallerSaved(SaveFPRegsMode fp_mode, |
| 833 | Register exclusion1, |
| 834 | Register exclusion2, |
| 835 | Register exclusion3) { |
| 836 | if (fp_mode == kSaveFPRegs) { |
| 837 | CpuFeatures::Scope scope(SSE2); |
| 838 | for (int i = 0; i < XMMRegister::kNumRegisters; i++) { |
| 839 | XMMRegister reg = XMMRegister::from_code(i); |
| 840 | movsd(reg, Operand(rsp, i * kDoubleSize)); |
| 841 | } |
| 842 | addq(rsp, Immediate(kDoubleSize * XMMRegister::kNumRegisters)); |
| 843 | } |
| 844 | for (int i = kNumberOfSavedRegs - 1; i >= 0; i--) { |
| 845 | Register reg = saved_regs[i]; |
| 846 | if (!reg.is(exclusion1) && !reg.is(exclusion2) && !reg.is(exclusion3)) { |
| 847 | pop(reg); |
| 848 | } |
| 849 | } |
| 850 | } |
| 851 | |
| 852 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 853 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 854 | if (x == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 855 | xorl(dst, dst); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 856 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 857 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 858 | } else if (is_int32(x)) { |
| 859 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 860 | } else { |
| 861 | movq(dst, x, RelocInfo::NONE); |
| 862 | } |
| 863 | } |
| 864 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 865 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 866 | if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 867 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 868 | } else { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 869 | Set(kScratchRegister, x); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 870 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 871 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 872 | } |
| 873 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 874 | // ---------------------------------------------------------------------------- |
| 875 | // Smi tagging, untagging and tag detection. |
| 876 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 877 | Register MacroAssembler::GetSmiConstant(Smi* source) { |
| 878 | int value = source->value(); |
| 879 | if (value == 0) { |
| 880 | xorl(kScratchRegister, kScratchRegister); |
| 881 | return kScratchRegister; |
| 882 | } |
| 883 | if (value == 1) { |
| 884 | return kSmiConstantRegister; |
| 885 | } |
| 886 | LoadSmiConstant(kScratchRegister, source); |
| 887 | return kScratchRegister; |
| 888 | } |
| 889 | |
| 890 | void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 891 | if (emit_debug_code()) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 892 | movq(dst, |
| 893 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 894 | RelocInfo::NONE); |
| 895 | cmpq(dst, kSmiConstantRegister); |
| 896 | if (allow_stub_calls()) { |
| 897 | Assert(equal, "Uninitialized kSmiConstantRegister"); |
| 898 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 899 | Label ok; |
| 900 | j(equal, &ok, Label::kNear); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 901 | int3(); |
| 902 | bind(&ok); |
| 903 | } |
| 904 | } |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 905 | int value = source->value(); |
| 906 | if (value == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 907 | xorl(dst, dst); |
| 908 | return; |
| 909 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 910 | bool negative = value < 0; |
| 911 | unsigned int uvalue = negative ? -value : value; |
| 912 | |
| 913 | switch (uvalue) { |
| 914 | case 9: |
| 915 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_8, 0)); |
| 916 | break; |
| 917 | case 8: |
| 918 | xorl(dst, dst); |
| 919 | lea(dst, Operand(dst, kSmiConstantRegister, times_8, 0)); |
| 920 | break; |
| 921 | case 4: |
| 922 | xorl(dst, dst); |
| 923 | lea(dst, Operand(dst, kSmiConstantRegister, times_4, 0)); |
| 924 | break; |
| 925 | case 5: |
| 926 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_4, 0)); |
| 927 | break; |
| 928 | case 3: |
| 929 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_2, 0)); |
| 930 | break; |
| 931 | case 2: |
| 932 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_1, 0)); |
| 933 | break; |
| 934 | case 1: |
| 935 | movq(dst, kSmiConstantRegister); |
| 936 | break; |
| 937 | case 0: |
| 938 | UNREACHABLE(); |
| 939 | return; |
| 940 | default: |
| 941 | movq(dst, reinterpret_cast<uint64_t>(source), RelocInfo::NONE); |
| 942 | return; |
| 943 | } |
| 944 | if (negative) { |
| 945 | neg(dst); |
| 946 | } |
| 947 | } |
| 948 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 949 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 950 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 951 | STATIC_ASSERT(kSmiTag == 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 952 | if (!dst.is(src)) { |
| 953 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 954 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 955 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 959 | void MacroAssembler::Integer32ToSmiField(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 960 | if (emit_debug_code()) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 961 | testb(dst, Immediate(0x01)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 962 | Label ok; |
| 963 | j(zero, &ok, Label::kNear); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 964 | if (allow_stub_calls()) { |
| 965 | Abort("Integer32ToSmiField writing to non-smi location"); |
| 966 | } else { |
| 967 | int3(); |
| 968 | } |
| 969 | bind(&ok); |
| 970 | } |
| 971 | ASSERT(kSmiShift % kBitsPerByte == 0); |
| 972 | movl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 973 | } |
| 974 | |
| 975 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 976 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 977 | Register src, |
| 978 | int constant) { |
| 979 | if (dst.is(src)) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 980 | addl(dst, Immediate(constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 981 | } else { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 982 | leal(dst, Operand(src, constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 983 | } |
| 984 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 985 | } |
| 986 | |
| 987 | |
| 988 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 989 | STATIC_ASSERT(kSmiTag == 0); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 990 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 991 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 992 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 993 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 994 | } |
| 995 | |
| 996 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 997 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 998 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 999 | } |
| 1000 | |
| 1001 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1002 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1003 | STATIC_ASSERT(kSmiTag == 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1004 | if (!dst.is(src)) { |
| 1005 | movq(dst, src); |
| 1006 | } |
| 1007 | sar(dst, Immediate(kSmiShift)); |
| 1008 | } |
| 1009 | |
| 1010 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1011 | void MacroAssembler::SmiToInteger64(Register dst, const Operand& src) { |
| 1012 | movsxlq(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 1013 | } |
| 1014 | |
| 1015 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1016 | void MacroAssembler::SmiTest(Register src) { |
| 1017 | testq(src, src); |
| 1018 | } |
| 1019 | |
| 1020 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1021 | void MacroAssembler::SmiCompare(Register smi1, Register smi2) { |
| 1022 | if (emit_debug_code()) { |
| 1023 | AbortIfNotSmi(smi1); |
| 1024 | AbortIfNotSmi(smi2); |
| 1025 | } |
| 1026 | cmpq(smi1, smi2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1027 | } |
| 1028 | |
| 1029 | |
| 1030 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1031 | if (emit_debug_code()) { |
| 1032 | AbortIfNotSmi(dst); |
| 1033 | } |
| 1034 | Cmp(dst, src); |
| 1035 | } |
| 1036 | |
| 1037 | |
| 1038 | void MacroAssembler::Cmp(Register dst, Smi* src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1039 | ASSERT(!dst.is(kScratchRegister)); |
| 1040 | if (src->value() == 0) { |
| 1041 | testq(dst, dst); |
| 1042 | } else { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1043 | Register constant_reg = GetSmiConstant(src); |
| 1044 | cmpq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1049 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1050 | if (emit_debug_code()) { |
| 1051 | AbortIfNotSmi(dst); |
| 1052 | AbortIfNotSmi(src); |
| 1053 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1054 | cmpq(dst, src); |
| 1055 | } |
| 1056 | |
| 1057 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1058 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1059 | if (emit_debug_code()) { |
| 1060 | AbortIfNotSmi(dst); |
| 1061 | AbortIfNotSmi(src); |
| 1062 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1063 | cmpq(dst, src); |
| 1064 | } |
| 1065 | |
| 1066 | |
| 1067 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1068 | if (emit_debug_code()) { |
| 1069 | AbortIfNotSmi(dst); |
| 1070 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1071 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1075 | void MacroAssembler::Cmp(const Operand& dst, Smi* src) { |
| 1076 | // The Operand cannot use the smi register. |
| 1077 | Register smi_reg = GetSmiConstant(src); |
| 1078 | ASSERT(!dst.AddressUsesRegister(smi_reg)); |
| 1079 | cmpq(dst, smi_reg); |
| 1080 | } |
| 1081 | |
| 1082 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1083 | void MacroAssembler::SmiCompareInteger32(const Operand& dst, Register src) { |
| 1084 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 1085 | } |
| 1086 | |
| 1087 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1088 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 1089 | Register src, |
| 1090 | int power) { |
| 1091 | ASSERT(power >= 0); |
| 1092 | ASSERT(power < 64); |
| 1093 | if (power == 0) { |
| 1094 | SmiToInteger64(dst, src); |
| 1095 | return; |
| 1096 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1097 | if (!dst.is(src)) { |
| 1098 | movq(dst, src); |
| 1099 | } |
| 1100 | if (power < kSmiShift) { |
| 1101 | sar(dst, Immediate(kSmiShift - power)); |
| 1102 | } else if (power > kSmiShift) { |
| 1103 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1108 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 1109 | Register src, |
| 1110 | int power) { |
| 1111 | ASSERT((0 <= power) && (power < 32)); |
| 1112 | if (dst.is(src)) { |
| 1113 | shr(dst, Immediate(power + kSmiShift)); |
| 1114 | } else { |
| 1115 | UNIMPLEMENTED(); // Not used. |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1120 | void MacroAssembler::SmiOrIfSmis(Register dst, Register src1, Register src2, |
| 1121 | Label* on_not_smis, |
| 1122 | Label::Distance near_jump) { |
| 1123 | if (dst.is(src1) || dst.is(src2)) { |
| 1124 | ASSERT(!src1.is(kScratchRegister)); |
| 1125 | ASSERT(!src2.is(kScratchRegister)); |
| 1126 | movq(kScratchRegister, src1); |
| 1127 | or_(kScratchRegister, src2); |
| 1128 | JumpIfNotSmi(kScratchRegister, on_not_smis, near_jump); |
| 1129 | movq(dst, kScratchRegister); |
| 1130 | } else { |
| 1131 | movq(dst, src1); |
| 1132 | or_(dst, src2); |
| 1133 | JumpIfNotSmi(dst, on_not_smis, near_jump); |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1138 | Condition MacroAssembler::CheckSmi(Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1139 | STATIC_ASSERT(kSmiTag == 0); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1140 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1141 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1145 | Condition MacroAssembler::CheckSmi(const Operand& src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1146 | STATIC_ASSERT(kSmiTag == 0); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1147 | testb(src, Immediate(kSmiTagMask)); |
| 1148 | return zero; |
| 1149 | } |
| 1150 | |
| 1151 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1152 | Condition MacroAssembler::CheckNonNegativeSmi(Register src) { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1153 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1154 | // 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] | 1155 | movq(kScratchRegister, src); |
| 1156 | rol(kScratchRegister, Immediate(1)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1157 | testb(kScratchRegister, Immediate(3)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1158 | return zero; |
| 1159 | } |
| 1160 | |
| 1161 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1162 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 1163 | if (first.is(second)) { |
| 1164 | return CheckSmi(first); |
| 1165 | } |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1166 | STATIC_ASSERT(kSmiTag == 0 && kHeapObjectTag == 1 && kHeapObjectTagMask == 3); |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 1167 | leal(kScratchRegister, Operand(first, second, times_1, 0)); |
| 1168 | testb(kScratchRegister, Immediate(0x03)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1169 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1173 | Condition MacroAssembler::CheckBothNonNegativeSmi(Register first, |
| 1174 | Register second) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1175 | if (first.is(second)) { |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1176 | return CheckNonNegativeSmi(first); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1177 | } |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 1178 | movq(kScratchRegister, first); |
| 1179 | or_(kScratchRegister, second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1180 | rol(kScratchRegister, Immediate(1)); |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1181 | testl(kScratchRegister, Immediate(3)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1182 | return zero; |
| 1183 | } |
| 1184 | |
| 1185 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1186 | Condition MacroAssembler::CheckEitherSmi(Register first, |
| 1187 | Register second, |
| 1188 | Register scratch) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1189 | if (first.is(second)) { |
| 1190 | return CheckSmi(first); |
| 1191 | } |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1192 | if (scratch.is(second)) { |
| 1193 | andl(scratch, first); |
| 1194 | } else { |
| 1195 | if (!scratch.is(first)) { |
| 1196 | movl(scratch, first); |
| 1197 | } |
| 1198 | andl(scratch, second); |
| 1199 | } |
| 1200 | testb(scratch, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1201 | return zero; |
| 1202 | } |
| 1203 | |
| 1204 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1205 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1206 | ASSERT(!src.is(kScratchRegister)); |
| 1207 | // If we overflow by subtracting one, it's the minimal smi value. |
| 1208 | cmpq(src, kSmiConstantRegister); |
| 1209 | return overflow; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1210 | } |
| 1211 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1212 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1213 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1214 | // A 32-bit integer value can always be converted to a smi. |
| 1215 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1216 | } |
| 1217 | |
| 1218 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1219 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 1220 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 1221 | // is not set. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1222 | testl(src, src); |
| 1223 | return positive; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1224 | } |
| 1225 | |
| 1226 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1227 | void MacroAssembler::CheckSmiToIndicator(Register dst, Register src) { |
| 1228 | if (dst.is(src)) { |
| 1229 | andl(dst, Immediate(kSmiTagMask)); |
| 1230 | } else { |
| 1231 | movl(dst, Immediate(kSmiTagMask)); |
| 1232 | andl(dst, src); |
| 1233 | } |
| 1234 | } |
| 1235 | |
| 1236 | |
| 1237 | void MacroAssembler::CheckSmiToIndicator(Register dst, const Operand& src) { |
| 1238 | if (!(src.AddressUsesRegister(dst))) { |
| 1239 | movl(dst, Immediate(kSmiTagMask)); |
| 1240 | andl(dst, src); |
| 1241 | } else { |
| 1242 | movl(dst, src); |
| 1243 | andl(dst, Immediate(kSmiTagMask)); |
| 1244 | } |
| 1245 | } |
| 1246 | |
| 1247 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1248 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, |
| 1249 | Label* on_invalid, |
| 1250 | Label::Distance near_jump) { |
| 1251 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1252 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1253 | } |
| 1254 | |
| 1255 | |
| 1256 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1257 | Label* on_invalid, |
| 1258 | Label::Distance near_jump) { |
| 1259 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1260 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1261 | } |
| 1262 | |
| 1263 | |
| 1264 | void MacroAssembler::JumpIfSmi(Register src, |
| 1265 | Label* on_smi, |
| 1266 | Label::Distance near_jump) { |
| 1267 | Condition smi = CheckSmi(src); |
| 1268 | j(smi, on_smi, near_jump); |
| 1269 | } |
| 1270 | |
| 1271 | |
| 1272 | void MacroAssembler::JumpIfNotSmi(Register src, |
| 1273 | Label* on_not_smi, |
| 1274 | Label::Distance near_jump) { |
| 1275 | Condition smi = CheckSmi(src); |
| 1276 | j(NegateCondition(smi), on_not_smi, near_jump); |
| 1277 | } |
| 1278 | |
| 1279 | |
| 1280 | void MacroAssembler::JumpUnlessNonNegativeSmi( |
| 1281 | Register src, Label* on_not_smi_or_negative, |
| 1282 | Label::Distance near_jump) { |
| 1283 | Condition non_negative_smi = CheckNonNegativeSmi(src); |
| 1284 | j(NegateCondition(non_negative_smi), on_not_smi_or_negative, near_jump); |
| 1285 | } |
| 1286 | |
| 1287 | |
| 1288 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1289 | Smi* constant, |
| 1290 | Label* on_equals, |
| 1291 | Label::Distance near_jump) { |
| 1292 | SmiCompare(src, constant); |
| 1293 | j(equal, on_equals, near_jump); |
| 1294 | } |
| 1295 | |
| 1296 | |
| 1297 | void MacroAssembler::JumpIfNotBothSmi(Register src1, |
| 1298 | Register src2, |
| 1299 | Label* on_not_both_smi, |
| 1300 | Label::Distance near_jump) { |
| 1301 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1302 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1, |
| 1307 | Register src2, |
| 1308 | Label* on_not_both_smi, |
| 1309 | Label::Distance near_jump) { |
| 1310 | Condition both_smi = CheckBothNonNegativeSmi(src1, src2); |
| 1311 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1312 | } |
| 1313 | |
| 1314 | |
| 1315 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 1316 | Register src, |
| 1317 | Smi* constant, |
| 1318 | Label* on_not_smi_result, |
| 1319 | Label::Distance near_jump) { |
| 1320 | // Does not assume that src is a smi. |
| 1321 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1322 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1323 | ASSERT(!dst.is(kScratchRegister)); |
| 1324 | ASSERT(!src.is(kScratchRegister)); |
| 1325 | |
| 1326 | JumpIfNotSmi(src, on_not_smi_result, near_jump); |
| 1327 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 1328 | LoadSmiConstant(tmp, constant); |
| 1329 | addq(tmp, src); |
| 1330 | j(overflow, on_not_smi_result, near_jump); |
| 1331 | if (dst.is(src)) { |
| 1332 | movq(dst, tmp); |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1337 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 1338 | if (constant->value() == 0) { |
| 1339 | if (!dst.is(src)) { |
| 1340 | movq(dst, src); |
| 1341 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1342 | return; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1343 | } else if (dst.is(src)) { |
| 1344 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1345 | switch (constant->value()) { |
| 1346 | case 1: |
| 1347 | addq(dst, kSmiConstantRegister); |
| 1348 | return; |
| 1349 | case 2: |
| 1350 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1351 | return; |
| 1352 | case 4: |
| 1353 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1354 | return; |
| 1355 | case 8: |
| 1356 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1357 | return; |
| 1358 | default: |
| 1359 | Register constant_reg = GetSmiConstant(constant); |
| 1360 | addq(dst, constant_reg); |
| 1361 | return; |
| 1362 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1363 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1364 | switch (constant->value()) { |
| 1365 | case 1: |
| 1366 | lea(dst, Operand(src, kSmiConstantRegister, times_1, 0)); |
| 1367 | return; |
| 1368 | case 2: |
| 1369 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1370 | return; |
| 1371 | case 4: |
| 1372 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1373 | return; |
| 1374 | case 8: |
| 1375 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1376 | return; |
| 1377 | default: |
| 1378 | LoadSmiConstant(dst, constant); |
| 1379 | addq(dst, src); |
| 1380 | return; |
| 1381 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1386 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 1387 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1388 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1389 | } |
| 1390 | } |
| 1391 | |
| 1392 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1393 | void MacroAssembler::SmiAddConstant(Register dst, |
| 1394 | Register src, |
| 1395 | Smi* constant, |
| 1396 | Label* on_not_smi_result, |
| 1397 | Label::Distance near_jump) { |
| 1398 | if (constant->value() == 0) { |
| 1399 | if (!dst.is(src)) { |
| 1400 | movq(dst, src); |
| 1401 | } |
| 1402 | } else if (dst.is(src)) { |
| 1403 | ASSERT(!dst.is(kScratchRegister)); |
| 1404 | |
| 1405 | LoadSmiConstant(kScratchRegister, constant); |
| 1406 | addq(kScratchRegister, src); |
| 1407 | j(overflow, on_not_smi_result, near_jump); |
| 1408 | movq(dst, kScratchRegister); |
| 1409 | } else { |
| 1410 | LoadSmiConstant(dst, constant); |
| 1411 | addq(dst, src); |
| 1412 | j(overflow, on_not_smi_result, near_jump); |
| 1413 | } |
| 1414 | } |
| 1415 | |
| 1416 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1417 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 1418 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1419 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1420 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1421 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1422 | } else if (dst.is(src)) { |
| 1423 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1424 | Register constant_reg = GetSmiConstant(constant); |
| 1425 | subq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1426 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1427 | if (constant->value() == Smi::kMinValue) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1428 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1429 | // Adding and subtracting the min-value gives the same result, it only |
| 1430 | // differs on the overflow bit, which we don't check here. |
| 1431 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1432 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1433 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1434 | LoadSmiConstant(dst, Smi::FromInt(-constant->value())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1435 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1436 | } |
| 1437 | } |
| 1438 | } |
| 1439 | |
| 1440 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1441 | void MacroAssembler::SmiSubConstant(Register dst, |
| 1442 | Register src, |
| 1443 | Smi* constant, |
| 1444 | Label* on_not_smi_result, |
| 1445 | Label::Distance near_jump) { |
| 1446 | if (constant->value() == 0) { |
| 1447 | if (!dst.is(src)) { |
| 1448 | movq(dst, src); |
| 1449 | } |
| 1450 | } else if (dst.is(src)) { |
| 1451 | ASSERT(!dst.is(kScratchRegister)); |
| 1452 | if (constant->value() == Smi::kMinValue) { |
| 1453 | // Subtracting min-value from any non-negative value will overflow. |
| 1454 | // We test the non-negativeness before doing the subtraction. |
| 1455 | testq(src, src); |
| 1456 | j(not_sign, on_not_smi_result, near_jump); |
| 1457 | LoadSmiConstant(kScratchRegister, constant); |
| 1458 | subq(dst, kScratchRegister); |
| 1459 | } else { |
| 1460 | // Subtract by adding the negation. |
| 1461 | LoadSmiConstant(kScratchRegister, Smi::FromInt(-constant->value())); |
| 1462 | addq(kScratchRegister, dst); |
| 1463 | j(overflow, on_not_smi_result, near_jump); |
| 1464 | movq(dst, kScratchRegister); |
| 1465 | } |
| 1466 | } else { |
| 1467 | if (constant->value() == Smi::kMinValue) { |
| 1468 | // Subtracting min-value from any non-negative value will overflow. |
| 1469 | // We test the non-negativeness before doing the subtraction. |
| 1470 | testq(src, src); |
| 1471 | j(not_sign, on_not_smi_result, near_jump); |
| 1472 | LoadSmiConstant(dst, constant); |
| 1473 | // Adding and subtracting the min-value gives the same result, it only |
| 1474 | // differs on the overflow bit, which we don't check here. |
| 1475 | addq(dst, src); |
| 1476 | } else { |
| 1477 | // Subtract by adding the negation. |
| 1478 | LoadSmiConstant(dst, Smi::FromInt(-(constant->value()))); |
| 1479 | addq(dst, src); |
| 1480 | j(overflow, on_not_smi_result, near_jump); |
| 1481 | } |
| 1482 | } |
| 1483 | } |
| 1484 | |
| 1485 | |
| 1486 | void MacroAssembler::SmiNeg(Register dst, |
| 1487 | Register src, |
| 1488 | Label* on_smi_result, |
| 1489 | Label::Distance near_jump) { |
| 1490 | if (dst.is(src)) { |
| 1491 | ASSERT(!dst.is(kScratchRegister)); |
| 1492 | movq(kScratchRegister, src); |
| 1493 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 1494 | // Test if result is zero or Smi::kMinValue. |
| 1495 | cmpq(dst, kScratchRegister); |
| 1496 | j(not_equal, on_smi_result, near_jump); |
| 1497 | movq(src, kScratchRegister); |
| 1498 | } else { |
| 1499 | movq(dst, src); |
| 1500 | neg(dst); |
| 1501 | cmpq(dst, src); |
| 1502 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 1503 | j(not_equal, on_smi_result, near_jump); |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | |
| 1508 | void MacroAssembler::SmiAdd(Register dst, |
| 1509 | Register src1, |
| 1510 | Register src2, |
| 1511 | Label* on_not_smi_result, |
| 1512 | Label::Distance near_jump) { |
| 1513 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1514 | ASSERT(!dst.is(src2)); |
| 1515 | if (dst.is(src1)) { |
| 1516 | movq(kScratchRegister, src1); |
| 1517 | addq(kScratchRegister, src2); |
| 1518 | j(overflow, on_not_smi_result, near_jump); |
| 1519 | movq(dst, kScratchRegister); |
| 1520 | } else { |
| 1521 | movq(dst, src1); |
| 1522 | addq(dst, src2); |
| 1523 | j(overflow, on_not_smi_result, near_jump); |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | |
| 1528 | void MacroAssembler::SmiAdd(Register dst, |
| 1529 | Register src1, |
| 1530 | const Operand& src2, |
| 1531 | Label* on_not_smi_result, |
| 1532 | Label::Distance near_jump) { |
| 1533 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1534 | if (dst.is(src1)) { |
| 1535 | movq(kScratchRegister, src1); |
| 1536 | addq(kScratchRegister, src2); |
| 1537 | j(overflow, on_not_smi_result, near_jump); |
| 1538 | movq(dst, kScratchRegister); |
| 1539 | } else { |
| 1540 | ASSERT(!src2.AddressUsesRegister(dst)); |
| 1541 | movq(dst, src1); |
| 1542 | addq(dst, src2); |
| 1543 | j(overflow, on_not_smi_result, near_jump); |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1548 | void MacroAssembler::SmiAdd(Register dst, |
| 1549 | Register src1, |
| 1550 | Register src2) { |
| 1551 | // No overflow checking. Use only when it's known that |
| 1552 | // overflowing is impossible. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1553 | if (!dst.is(src1)) { |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 1554 | if (emit_debug_code()) { |
| 1555 | movq(kScratchRegister, src1); |
| 1556 | addq(kScratchRegister, src2); |
| 1557 | Check(no_overflow, "Smi addition overflow"); |
| 1558 | } |
| 1559 | lea(dst, Operand(src1, src2, times_1, 0)); |
| 1560 | } else { |
| 1561 | addq(dst, src2); |
| 1562 | Assert(no_overflow, "Smi addition overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1567 | void MacroAssembler::SmiSub(Register dst, |
| 1568 | Register src1, |
| 1569 | Register src2, |
| 1570 | Label* on_not_smi_result, |
| 1571 | Label::Distance near_jump) { |
| 1572 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1573 | ASSERT(!dst.is(src2)); |
| 1574 | if (dst.is(src1)) { |
| 1575 | cmpq(dst, src2); |
| 1576 | j(overflow, on_not_smi_result, near_jump); |
| 1577 | subq(dst, src2); |
| 1578 | } else { |
| 1579 | movq(dst, src1); |
| 1580 | subq(dst, src2); |
| 1581 | j(overflow, on_not_smi_result, near_jump); |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1586 | void MacroAssembler::SmiSub(Register dst, Register src1, Register src2) { |
| 1587 | // No overflow checking. Use only when it's known that |
| 1588 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1589 | ASSERT(!dst.is(src2)); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1590 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1591 | movq(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1592 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1593 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1594 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1595 | } |
| 1596 | |
| 1597 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1598 | void MacroAssembler::SmiSub(Register dst, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1599 | Register src1, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1600 | const Operand& src2, |
| 1601 | Label* on_not_smi_result, |
| 1602 | Label::Distance near_jump) { |
| 1603 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1604 | if (dst.is(src1)) { |
| 1605 | movq(kScratchRegister, src2); |
| 1606 | cmpq(src1, kScratchRegister); |
| 1607 | j(overflow, on_not_smi_result, near_jump); |
| 1608 | subq(src1, kScratchRegister); |
| 1609 | } else { |
| 1610 | movq(dst, src1); |
| 1611 | subq(dst, src2); |
| 1612 | j(overflow, on_not_smi_result, near_jump); |
| 1613 | } |
| 1614 | } |
| 1615 | |
| 1616 | |
| 1617 | void MacroAssembler::SmiSub(Register dst, |
| 1618 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1619 | const Operand& src2) { |
| 1620 | // No overflow checking. Use only when it's known that |
| 1621 | // overflowing is impossible (e.g., subtracting two positive smis). |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1622 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1623 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1624 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1625 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1626 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1630 | void MacroAssembler::SmiMul(Register dst, |
| 1631 | Register src1, |
| 1632 | Register src2, |
| 1633 | Label* on_not_smi_result, |
| 1634 | Label::Distance near_jump) { |
| 1635 | ASSERT(!dst.is(src2)); |
| 1636 | ASSERT(!dst.is(kScratchRegister)); |
| 1637 | ASSERT(!src1.is(kScratchRegister)); |
| 1638 | ASSERT(!src2.is(kScratchRegister)); |
| 1639 | |
| 1640 | if (dst.is(src1)) { |
| 1641 | Label failure, zero_correct_result; |
| 1642 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 1643 | SmiToInteger64(dst, src1); |
| 1644 | imul(dst, src2); |
| 1645 | j(overflow, &failure, Label::kNear); |
| 1646 | |
| 1647 | // Check for negative zero result. If product is zero, and one |
| 1648 | // argument is negative, go to slow case. |
| 1649 | Label correct_result; |
| 1650 | testq(dst, dst); |
| 1651 | j(not_zero, &correct_result, Label::kNear); |
| 1652 | |
| 1653 | movq(dst, kScratchRegister); |
| 1654 | xor_(dst, src2); |
| 1655 | // Result was positive zero. |
| 1656 | j(positive, &zero_correct_result, Label::kNear); |
| 1657 | |
| 1658 | bind(&failure); // Reused failure exit, restores src1. |
| 1659 | movq(src1, kScratchRegister); |
| 1660 | jmp(on_not_smi_result, near_jump); |
| 1661 | |
| 1662 | bind(&zero_correct_result); |
| 1663 | Set(dst, 0); |
| 1664 | |
| 1665 | bind(&correct_result); |
| 1666 | } else { |
| 1667 | SmiToInteger64(dst, src1); |
| 1668 | imul(dst, src2); |
| 1669 | j(overflow, on_not_smi_result, near_jump); |
| 1670 | // Check for negative zero result. If product is zero, and one |
| 1671 | // argument is negative, go to slow case. |
| 1672 | Label correct_result; |
| 1673 | testq(dst, dst); |
| 1674 | j(not_zero, &correct_result, Label::kNear); |
| 1675 | // One of src1 and src2 is zero, the check whether the other is |
| 1676 | // negative. |
| 1677 | movq(kScratchRegister, src1); |
| 1678 | xor_(kScratchRegister, src2); |
| 1679 | j(negative, on_not_smi_result, near_jump); |
| 1680 | bind(&correct_result); |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | |
| 1685 | void MacroAssembler::SmiDiv(Register dst, |
| 1686 | Register src1, |
| 1687 | Register src2, |
| 1688 | Label* on_not_smi_result, |
| 1689 | Label::Distance near_jump) { |
| 1690 | ASSERT(!src1.is(kScratchRegister)); |
| 1691 | ASSERT(!src2.is(kScratchRegister)); |
| 1692 | ASSERT(!dst.is(kScratchRegister)); |
| 1693 | ASSERT(!src2.is(rax)); |
| 1694 | ASSERT(!src2.is(rdx)); |
| 1695 | ASSERT(!src1.is(rdx)); |
| 1696 | |
| 1697 | // Check for 0 divisor (result is +/-Infinity). |
| 1698 | testq(src2, src2); |
| 1699 | j(zero, on_not_smi_result, near_jump); |
| 1700 | |
| 1701 | if (src1.is(rax)) { |
| 1702 | movq(kScratchRegister, src1); |
| 1703 | } |
| 1704 | SmiToInteger32(rax, src1); |
| 1705 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 1706 | // overflow in idiv and raise an exception. |
| 1707 | // We combine this with negative zero test (negative zero only happens |
| 1708 | // when dividing zero by a negative number). |
| 1709 | |
| 1710 | // We overshoot a little and go to slow case if we divide min-value |
| 1711 | // by any negative value, not just -1. |
| 1712 | Label safe_div; |
| 1713 | testl(rax, Immediate(0x7fffffff)); |
| 1714 | j(not_zero, &safe_div, Label::kNear); |
| 1715 | testq(src2, src2); |
| 1716 | if (src1.is(rax)) { |
| 1717 | j(positive, &safe_div, Label::kNear); |
| 1718 | movq(src1, kScratchRegister); |
| 1719 | jmp(on_not_smi_result, near_jump); |
| 1720 | } else { |
| 1721 | j(negative, on_not_smi_result, near_jump); |
| 1722 | } |
| 1723 | bind(&safe_div); |
| 1724 | |
| 1725 | SmiToInteger32(src2, src2); |
| 1726 | // Sign extend src1 into edx:eax. |
| 1727 | cdq(); |
| 1728 | idivl(src2); |
| 1729 | Integer32ToSmi(src2, src2); |
| 1730 | // Check that the remainder is zero. |
| 1731 | testl(rdx, rdx); |
| 1732 | if (src1.is(rax)) { |
| 1733 | Label smi_result; |
| 1734 | j(zero, &smi_result, Label::kNear); |
| 1735 | movq(src1, kScratchRegister); |
| 1736 | jmp(on_not_smi_result, near_jump); |
| 1737 | bind(&smi_result); |
| 1738 | } else { |
| 1739 | j(not_zero, on_not_smi_result, near_jump); |
| 1740 | } |
| 1741 | if (!dst.is(src1) && src1.is(rax)) { |
| 1742 | movq(src1, kScratchRegister); |
| 1743 | } |
| 1744 | Integer32ToSmi(dst, rax); |
| 1745 | } |
| 1746 | |
| 1747 | |
| 1748 | void MacroAssembler::SmiMod(Register dst, |
| 1749 | Register src1, |
| 1750 | Register src2, |
| 1751 | Label* on_not_smi_result, |
| 1752 | Label::Distance near_jump) { |
| 1753 | ASSERT(!dst.is(kScratchRegister)); |
| 1754 | ASSERT(!src1.is(kScratchRegister)); |
| 1755 | ASSERT(!src2.is(kScratchRegister)); |
| 1756 | ASSERT(!src2.is(rax)); |
| 1757 | ASSERT(!src2.is(rdx)); |
| 1758 | ASSERT(!src1.is(rdx)); |
| 1759 | ASSERT(!src1.is(src2)); |
| 1760 | |
| 1761 | testq(src2, src2); |
| 1762 | j(zero, on_not_smi_result, near_jump); |
| 1763 | |
| 1764 | if (src1.is(rax)) { |
| 1765 | movq(kScratchRegister, src1); |
| 1766 | } |
| 1767 | SmiToInteger32(rax, src1); |
| 1768 | SmiToInteger32(src2, src2); |
| 1769 | |
| 1770 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1771 | Label safe_div; |
| 1772 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1773 | j(not_equal, &safe_div, Label::kNear); |
| 1774 | cmpl(src2, Immediate(-1)); |
| 1775 | j(not_equal, &safe_div, Label::kNear); |
| 1776 | // Retag inputs and go slow case. |
| 1777 | Integer32ToSmi(src2, src2); |
| 1778 | if (src1.is(rax)) { |
| 1779 | movq(src1, kScratchRegister); |
| 1780 | } |
| 1781 | jmp(on_not_smi_result, near_jump); |
| 1782 | bind(&safe_div); |
| 1783 | |
| 1784 | // Sign extend eax into edx:eax. |
| 1785 | cdq(); |
| 1786 | idivl(src2); |
| 1787 | // Restore smi tags on inputs. |
| 1788 | Integer32ToSmi(src2, src2); |
| 1789 | if (src1.is(rax)) { |
| 1790 | movq(src1, kScratchRegister); |
| 1791 | } |
| 1792 | // Check for a negative zero result. If the result is zero, and the |
| 1793 | // dividend is negative, go slow to return a floating point negative zero. |
| 1794 | Label smi_result; |
| 1795 | testl(rdx, rdx); |
| 1796 | j(not_zero, &smi_result, Label::kNear); |
| 1797 | testq(src1, src1); |
| 1798 | j(negative, on_not_smi_result, near_jump); |
| 1799 | bind(&smi_result); |
| 1800 | Integer32ToSmi(dst, rdx); |
| 1801 | } |
| 1802 | |
| 1803 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1804 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1805 | ASSERT(!dst.is(kScratchRegister)); |
| 1806 | ASSERT(!src.is(kScratchRegister)); |
| 1807 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1808 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1809 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1810 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1811 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1812 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1813 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1814 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1815 | } |
| 1816 | |
| 1817 | |
| 1818 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1819 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1820 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1821 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1822 | } |
| 1823 | and_(dst, src2); |
| 1824 | } |
| 1825 | |
| 1826 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1827 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1828 | if (constant->value() == 0) { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1829 | Set(dst, 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1830 | } else if (dst.is(src)) { |
| 1831 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1832 | Register constant_reg = GetSmiConstant(constant); |
| 1833 | and_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1834 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1835 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1836 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1837 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1838 | } |
| 1839 | |
| 1840 | |
| 1841 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1842 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1843 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1844 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1845 | } |
| 1846 | or_(dst, src2); |
| 1847 | } |
| 1848 | |
| 1849 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1850 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1851 | if (dst.is(src)) { |
| 1852 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1853 | Register constant_reg = GetSmiConstant(constant); |
| 1854 | or_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1855 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1856 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1857 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1858 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1859 | } |
| 1860 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1861 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1862 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1863 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1864 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1865 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1866 | } |
| 1867 | xor_(dst, src2); |
| 1868 | } |
| 1869 | |
| 1870 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1871 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1872 | if (dst.is(src)) { |
| 1873 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1874 | Register constant_reg = GetSmiConstant(constant); |
| 1875 | xor_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1876 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1877 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1878 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1879 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1880 | } |
| 1881 | |
| 1882 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1883 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1884 | Register src, |
| 1885 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1886 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1887 | if (shift_value > 0) { |
| 1888 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1889 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1890 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1891 | } else { |
| 1892 | UNIMPLEMENTED(); // Not used. |
| 1893 | } |
| 1894 | } |
| 1895 | } |
| 1896 | |
| 1897 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1898 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1899 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1900 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1901 | if (!dst.is(src)) { |
| 1902 | movq(dst, src); |
| 1903 | } |
| 1904 | if (shift_value > 0) { |
| 1905 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1910 | void MacroAssembler::SmiShiftLogicalRightConstant( |
| 1911 | Register dst, Register src, int shift_value, |
| 1912 | Label* on_not_smi_result, Label::Distance near_jump) { |
| 1913 | // Logic right shift interprets its result as an *unsigned* number. |
| 1914 | if (dst.is(src)) { |
| 1915 | UNIMPLEMENTED(); // Not used. |
| 1916 | } else { |
| 1917 | movq(dst, src); |
| 1918 | if (shift_value == 0) { |
| 1919 | testq(dst, dst); |
| 1920 | j(negative, on_not_smi_result, near_jump); |
| 1921 | } |
| 1922 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1923 | shl(dst, Immediate(kSmiShift)); |
| 1924 | } |
| 1925 | } |
| 1926 | |
| 1927 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1928 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 1929 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1930 | Register src2) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1931 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1932 | // Untag shift amount. |
| 1933 | if (!dst.is(src1)) { |
| 1934 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1935 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1936 | SmiToInteger32(rcx, src2); |
| 1937 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 1938 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1939 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1940 | } |
| 1941 | |
| 1942 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1943 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1944 | Register src1, |
| 1945 | Register src2, |
| 1946 | Label* on_not_smi_result, |
| 1947 | Label::Distance near_jump) { |
| 1948 | ASSERT(!dst.is(kScratchRegister)); |
| 1949 | ASSERT(!src1.is(kScratchRegister)); |
| 1950 | ASSERT(!src2.is(kScratchRegister)); |
| 1951 | ASSERT(!dst.is(rcx)); |
| 1952 | // dst and src1 can be the same, because the one case that bails out |
| 1953 | // is a shift by 0, which leaves dst, and therefore src1, unchanged. |
| 1954 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1955 | movq(kScratchRegister, rcx); |
| 1956 | } |
| 1957 | if (!dst.is(src1)) { |
| 1958 | movq(dst, src1); |
| 1959 | } |
| 1960 | SmiToInteger32(rcx, src2); |
| 1961 | orl(rcx, Immediate(kSmiShift)); |
| 1962 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
| 1963 | shl(dst, Immediate(kSmiShift)); |
| 1964 | testq(dst, dst); |
| 1965 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1966 | Label positive_result; |
| 1967 | j(positive, &positive_result, Label::kNear); |
| 1968 | if (src1.is(rcx)) { |
| 1969 | movq(src1, kScratchRegister); |
| 1970 | } else { |
| 1971 | movq(src2, kScratchRegister); |
| 1972 | } |
| 1973 | jmp(on_not_smi_result, near_jump); |
| 1974 | bind(&positive_result); |
| 1975 | } else { |
| 1976 | // src2 was zero and src1 negative. |
| 1977 | j(negative, on_not_smi_result, near_jump); |
| 1978 | } |
| 1979 | } |
| 1980 | |
| 1981 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1982 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1983 | Register src1, |
| 1984 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1985 | ASSERT(!dst.is(kScratchRegister)); |
| 1986 | ASSERT(!src1.is(kScratchRegister)); |
| 1987 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1988 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1989 | if (src1.is(rcx)) { |
| 1990 | movq(kScratchRegister, src1); |
| 1991 | } else if (src2.is(rcx)) { |
| 1992 | movq(kScratchRegister, src2); |
| 1993 | } |
| 1994 | if (!dst.is(src1)) { |
| 1995 | movq(dst, src1); |
| 1996 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1997 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1998 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1999 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2000 | shl(dst, Immediate(kSmiShift)); |
| 2001 | if (src1.is(rcx)) { |
| 2002 | movq(src1, kScratchRegister); |
| 2003 | } else if (src2.is(rcx)) { |
| 2004 | movq(src2, kScratchRegister); |
| 2005 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2006 | } |
| 2007 | |
| 2008 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2009 | void MacroAssembler::SelectNonSmi(Register dst, |
| 2010 | Register src1, |
| 2011 | Register src2, |
| 2012 | Label* on_not_smis, |
| 2013 | Label::Distance near_jump) { |
| 2014 | ASSERT(!dst.is(kScratchRegister)); |
| 2015 | ASSERT(!src1.is(kScratchRegister)); |
| 2016 | ASSERT(!src2.is(kScratchRegister)); |
| 2017 | ASSERT(!dst.is(src1)); |
| 2018 | ASSERT(!dst.is(src2)); |
| 2019 | // Both operands must not be smis. |
| 2020 | #ifdef DEBUG |
| 2021 | if (allow_stub_calls()) { // Check contains a stub call. |
| 2022 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 2023 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 2024 | } |
| 2025 | #endif |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2026 | STATIC_ASSERT(kSmiTag == 0); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2027 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 2028 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
| 2029 | and_(kScratchRegister, src1); |
| 2030 | testl(kScratchRegister, src2); |
| 2031 | // If non-zero then both are smis. |
| 2032 | j(not_zero, on_not_smis, near_jump); |
| 2033 | |
| 2034 | // Exactly one operand is a smi. |
| 2035 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 2036 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 2037 | subq(kScratchRegister, Immediate(1)); |
| 2038 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 2039 | movq(dst, src1); |
| 2040 | xor_(dst, src2); |
| 2041 | and_(dst, kScratchRegister); |
| 2042 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 2043 | xor_(dst, src1); |
| 2044 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
| 2045 | } |
| 2046 | |
| 2047 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2048 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 2049 | Register src, |
| 2050 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2051 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2052 | // There is a possible optimization if shift is in the range 60-63, but that |
| 2053 | // will (and must) never happen. |
| 2054 | if (!dst.is(src)) { |
| 2055 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2056 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2057 | if (shift < kSmiShift) { |
| 2058 | sar(dst, Immediate(kSmiShift - shift)); |
| 2059 | } else { |
| 2060 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2061 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2062 | return SmiIndex(dst, times_1); |
| 2063 | } |
| 2064 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2065 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 2066 | Register src, |
| 2067 | int shift) { |
| 2068 | // Register src holds a positive smi. |
| 2069 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2070 | if (!dst.is(src)) { |
| 2071 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2072 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2073 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2074 | if (shift < kSmiShift) { |
| 2075 | sar(dst, Immediate(kSmiShift - shift)); |
| 2076 | } else { |
| 2077 | shl(dst, Immediate(shift - kSmiShift)); |
| 2078 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2079 | return SmiIndex(dst, times_1); |
| 2080 | } |
| 2081 | |
| 2082 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2083 | void MacroAssembler::AddSmiField(Register dst, const Operand& src) { |
| 2084 | ASSERT_EQ(0, kSmiShift % kBitsPerByte); |
| 2085 | addl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 2086 | } |
| 2087 | |
| 2088 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2089 | void MacroAssembler::JumpIfNotString(Register object, |
| 2090 | Register object_map, |
| 2091 | Label* not_string, |
| 2092 | Label::Distance near_jump) { |
| 2093 | Condition is_smi = CheckSmi(object); |
| 2094 | j(is_smi, not_string, near_jump); |
| 2095 | CmpObjectType(object, FIRST_NONSTRING_TYPE, object_map); |
| 2096 | j(above_equal, not_string, near_jump); |
| 2097 | } |
| 2098 | |
| 2099 | |
| 2100 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings( |
| 2101 | Register first_object, |
| 2102 | Register second_object, |
| 2103 | Register scratch1, |
| 2104 | Register scratch2, |
| 2105 | Label* on_fail, |
| 2106 | Label::Distance near_jump) { |
| 2107 | // Check that both objects are not smis. |
| 2108 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 2109 | j(either_smi, on_fail, near_jump); |
| 2110 | |
| 2111 | // Load instance type for both strings. |
| 2112 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 2113 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 2114 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 2115 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 2116 | |
| 2117 | // Check that both are flat ascii strings. |
| 2118 | ASSERT(kNotStringTag != 0); |
| 2119 | const int kFlatAsciiStringMask = |
| 2120 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2121 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2122 | |
| 2123 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2124 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2125 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2126 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2127 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2128 | cmpl(scratch1, |
| 2129 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2130 | j(not_equal, on_fail, near_jump); |
| 2131 | } |
| 2132 | |
| 2133 | |
| 2134 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 2135 | Register instance_type, |
| 2136 | Register scratch, |
| 2137 | Label* failure, |
| 2138 | Label::Distance near_jump) { |
| 2139 | if (!scratch.is(instance_type)) { |
| 2140 | movl(scratch, instance_type); |
| 2141 | } |
| 2142 | |
| 2143 | const int kFlatAsciiStringMask = |
| 2144 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2145 | |
| 2146 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 2147 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 2148 | j(not_equal, failure, near_jump); |
| 2149 | } |
| 2150 | |
| 2151 | |
| 2152 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 2153 | Register first_object_instance_type, |
| 2154 | Register second_object_instance_type, |
| 2155 | Register scratch1, |
| 2156 | Register scratch2, |
| 2157 | Label* on_fail, |
| 2158 | Label::Distance near_jump) { |
| 2159 | // Load instance type for both strings. |
| 2160 | movq(scratch1, first_object_instance_type); |
| 2161 | movq(scratch2, second_object_instance_type); |
| 2162 | |
| 2163 | // Check that both are flat ascii strings. |
| 2164 | ASSERT(kNotStringTag != 0); |
| 2165 | const int kFlatAsciiStringMask = |
| 2166 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2167 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2168 | |
| 2169 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2170 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2171 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2172 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2173 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2174 | cmpl(scratch1, |
| 2175 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2176 | j(not_equal, on_fail, near_jump); |
| 2177 | } |
| 2178 | |
| 2179 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2180 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2181 | void MacroAssembler::Move(Register dst, Register src) { |
| 2182 | if (!dst.is(src)) { |
| 2183 | movq(dst, src); |
| 2184 | } |
| 2185 | } |
| 2186 | |
| 2187 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2188 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2189 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2190 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2191 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2192 | } else { |
| 2193 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 2194 | } |
| 2195 | } |
| 2196 | |
| 2197 | |
| 2198 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2199 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2200 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2201 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2202 | } else { |
| 2203 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2204 | movq(dst, kScratchRegister); |
| 2205 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2206 | } |
| 2207 | |
| 2208 | |
| 2209 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2210 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2211 | Cmp(dst, Smi::cast(*source)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2212 | } else { |
| 2213 | Move(kScratchRegister, source); |
| 2214 | cmpq(dst, kScratchRegister); |
| 2215 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2216 | } |
| 2217 | |
| 2218 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2219 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2220 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2221 | Cmp(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2222 | } else { |
| 2223 | ASSERT(source->IsHeapObject()); |
| 2224 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2225 | cmpq(dst, kScratchRegister); |
| 2226 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2227 | } |
| 2228 | |
| 2229 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2230 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2231 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2232 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2233 | } else { |
| 2234 | ASSERT(source->IsHeapObject()); |
| 2235 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2236 | push(kScratchRegister); |
| 2237 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2238 | } |
| 2239 | |
| 2240 | |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame^] | 2241 | void MacroAssembler::LoadHeapObject(Register result, |
| 2242 | Handle<HeapObject> object) { |
| 2243 | if (isolate()->heap()->InNewSpace(*object)) { |
| 2244 | Handle<JSGlobalPropertyCell> cell = |
| 2245 | isolate()->factory()->NewJSGlobalPropertyCell(object); |
| 2246 | movq(result, cell, RelocInfo::GLOBAL_PROPERTY_CELL); |
| 2247 | movq(result, Operand(result, 0)); |
| 2248 | } else { |
| 2249 | Move(result, object); |
| 2250 | } |
| 2251 | } |
| 2252 | |
| 2253 | |
| 2254 | void MacroAssembler::PushHeapObject(Handle<HeapObject> object) { |
| 2255 | if (isolate()->heap()->InNewSpace(*object)) { |
| 2256 | Handle<JSGlobalPropertyCell> cell = |
| 2257 | isolate()->factory()->NewJSGlobalPropertyCell(object); |
| 2258 | movq(kScratchRegister, cell, RelocInfo::GLOBAL_PROPERTY_CELL); |
| 2259 | movq(kScratchRegister, Operand(kScratchRegister, 0)); |
| 2260 | push(kScratchRegister); |
| 2261 | } else { |
| 2262 | Push(object); |
| 2263 | } |
| 2264 | } |
| 2265 | |
| 2266 | |
| 2267 | void MacroAssembler::LoadGlobalCell(Register dst, |
| 2268 | Handle<JSGlobalPropertyCell> cell) { |
| 2269 | if (dst.is(rax)) { |
| 2270 | load_rax(cell.location(), RelocInfo::GLOBAL_PROPERTY_CELL); |
| 2271 | } else { |
| 2272 | movq(dst, cell, RelocInfo::GLOBAL_PROPERTY_CELL); |
| 2273 | movq(dst, Operand(dst, 0)); |
| 2274 | } |
| 2275 | } |
| 2276 | |
| 2277 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2278 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2279 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 2280 | if (is_int32(smi)) { |
| 2281 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2282 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 2283 | Register constant = GetSmiConstant(source); |
| 2284 | push(constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2285 | } |
| 2286 | } |
| 2287 | |
| 2288 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2289 | void MacroAssembler::Drop(int stack_elements) { |
| 2290 | if (stack_elements > 0) { |
| 2291 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 2292 | } |
| 2293 | } |
| 2294 | |
| 2295 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2296 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 2297 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2298 | } |
| 2299 | |
| 2300 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2301 | void MacroAssembler::TestBit(const Operand& src, int bits) { |
| 2302 | int byte_offset = bits / kBitsPerByte; |
| 2303 | int bit_in_byte = bits & (kBitsPerByte - 1); |
| 2304 | testb(Operand(src, byte_offset), Immediate(1 << bit_in_byte)); |
| 2305 | } |
| 2306 | |
| 2307 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2308 | void MacroAssembler::Jump(ExternalReference ext) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2309 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2310 | jmp(kScratchRegister); |
| 2311 | } |
| 2312 | |
| 2313 | |
| 2314 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 2315 | movq(kScratchRegister, destination, rmode); |
| 2316 | jmp(kScratchRegister); |
| 2317 | } |
| 2318 | |
| 2319 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2320 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2321 | // TODO(X64): Inline this |
| 2322 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2323 | } |
| 2324 | |
| 2325 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2326 | int MacroAssembler::CallSize(ExternalReference ext) { |
| 2327 | // Opcode for call kScratchRegister is: Rex.B FF D4 (three bytes). |
| 2328 | const int kCallInstructionSize = 3; |
| 2329 | return LoadAddressSize(ext) + kCallInstructionSize; |
| 2330 | } |
| 2331 | |
| 2332 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2333 | void MacroAssembler::Call(ExternalReference ext) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2334 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2335 | int end_position = pc_offset() + CallSize(ext); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2336 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2337 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2338 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2339 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2340 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2341 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2342 | } |
| 2343 | |
| 2344 | |
| 2345 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2346 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2347 | int end_position = pc_offset() + CallSize(destination, rmode); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2348 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2349 | movq(kScratchRegister, destination, rmode); |
| 2350 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2351 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2352 | CHECK_EQ(pc_offset(), end_position); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2353 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2354 | } |
| 2355 | |
| 2356 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2357 | void MacroAssembler::Call(Handle<Code> code_object, |
| 2358 | RelocInfo::Mode rmode, |
| 2359 | unsigned ast_id) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2360 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2361 | int end_position = pc_offset() + CallSize(code_object); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2362 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2363 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2364 | call(code_object, rmode, ast_id); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2365 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2366 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2367 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2368 | } |
| 2369 | |
| 2370 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2371 | void MacroAssembler::Pushad() { |
| 2372 | push(rax); |
| 2373 | push(rcx); |
| 2374 | push(rdx); |
| 2375 | push(rbx); |
| 2376 | // Not pushing rsp or rbp. |
| 2377 | push(rsi); |
| 2378 | push(rdi); |
| 2379 | push(r8); |
| 2380 | push(r9); |
| 2381 | // r10 is kScratchRegister. |
| 2382 | push(r11); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2383 | // r12 is kSmiConstantRegister. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2384 | // r13 is kRootRegister. |
| 2385 | push(r14); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2386 | push(r15); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2387 | STATIC_ASSERT(11 == kNumSafepointSavedRegisters); |
| 2388 | // Use lea for symmetry with Popad. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2389 | int sp_delta = |
| 2390 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2391 | lea(rsp, Operand(rsp, -sp_delta)); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2392 | } |
| 2393 | |
| 2394 | |
| 2395 | void MacroAssembler::Popad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2396 | // 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] | 2397 | int sp_delta = |
| 2398 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2399 | lea(rsp, Operand(rsp, sp_delta)); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2400 | pop(r15); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2401 | pop(r14); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2402 | pop(r11); |
| 2403 | pop(r9); |
| 2404 | pop(r8); |
| 2405 | pop(rdi); |
| 2406 | pop(rsi); |
| 2407 | pop(rbx); |
| 2408 | pop(rdx); |
| 2409 | pop(rcx); |
| 2410 | pop(rax); |
| 2411 | } |
| 2412 | |
| 2413 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2414 | void MacroAssembler::Dropad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2415 | addq(rsp, Immediate(kNumSafepointRegisters * kPointerSize)); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2416 | } |
| 2417 | |
| 2418 | |
| 2419 | // Order general registers are pushed by Pushad: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2420 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2421 | int MacroAssembler::kSafepointPushRegisterIndices[Register::kNumRegisters] = { |
| 2422 | 0, |
| 2423 | 1, |
| 2424 | 2, |
| 2425 | 3, |
| 2426 | -1, |
| 2427 | -1, |
| 2428 | 4, |
| 2429 | 5, |
| 2430 | 6, |
| 2431 | 7, |
| 2432 | -1, |
| 2433 | 8, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2434 | -1, |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2435 | -1, |
| 2436 | 9, |
| 2437 | 10 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2438 | }; |
| 2439 | |
| 2440 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2441 | void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Register src) { |
| 2442 | movq(SafepointRegisterSlot(dst), src); |
| 2443 | } |
| 2444 | |
| 2445 | |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 2446 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 2447 | movq(dst, SafepointRegisterSlot(src)); |
| 2448 | } |
| 2449 | |
| 2450 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2451 | Operand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 2452 | return Operand(rsp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 2453 | } |
| 2454 | |
| 2455 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2456 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2457 | HandlerType type, |
| 2458 | int handler_index) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2459 | // Adjust this code if not the case. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2460 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2461 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2462 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2463 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2464 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2465 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2466 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2467 | // We will build up the handler from the bottom by pushing on the stack. |
| 2468 | // First compute the state and push the frame pointer and context. |
| 2469 | unsigned state = StackHandler::OffsetField::encode(handler_index); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2470 | if (try_location == IN_JAVASCRIPT) { |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2471 | push(rbp); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2472 | push(rsi); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2473 | state |= (type == TRY_CATCH_HANDLER) |
| 2474 | ? StackHandler::KindField::encode(StackHandler::TRY_CATCH) |
| 2475 | : StackHandler::KindField::encode(StackHandler::TRY_FINALLY); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2476 | } else { |
| 2477 | ASSERT(try_location == IN_JS_ENTRY); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2478 | // The frame pointer does not point to a JS frame so we save NULL for |
| 2479 | // rbp. We expect the code throwing an exception to check rbp before |
| 2480 | // dereferencing it to restore the context. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2481 | push(Immediate(0)); // NULL frame pointer. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2482 | Push(Smi::FromInt(0)); // No context. |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2483 | state |= StackHandler::KindField::encode(StackHandler::ENTRY); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2484 | } |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2485 | |
| 2486 | // Push the state and the code object. |
| 2487 | push(Immediate(state)); |
| 2488 | Push(CodeObject()); |
| 2489 | |
| 2490 | // Link the current handler as the next handler. |
| 2491 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
| 2492 | push(ExternalOperand(handler_address)); |
| 2493 | // Set this new handler as the current one. |
| 2494 | movq(ExternalOperand(handler_address), rsp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2495 | } |
| 2496 | |
| 2497 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2498 | void MacroAssembler::PopTryHandler() { |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2499 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2500 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
| 2501 | pop(ExternalOperand(handler_address)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2502 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 2503 | } |
| 2504 | |
| 2505 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2506 | void MacroAssembler::JumpToHandlerEntry() { |
| 2507 | // Compute the handler entry address and jump to it. The handler table is |
| 2508 | // a fixed array of (smi-tagged) code offsets. |
| 2509 | // rax = exception, rdi = code object, rdx = state. |
| 2510 | movq(rbx, FieldOperand(rdi, Code::kHandlerTableOffset)); |
| 2511 | shr(rdx, Immediate(StackHandler::kKindWidth)); |
| 2512 | movq(rdx, FieldOperand(rbx, rdx, times_8, FixedArray::kHeaderSize)); |
| 2513 | SmiToInteger64(rdx, rdx); |
| 2514 | lea(rdi, FieldOperand(rdi, rdx, times_1, Code::kHeaderSize)); |
| 2515 | jmp(rdi); |
| 2516 | } |
| 2517 | |
| 2518 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2519 | void MacroAssembler::Throw(Register value) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2520 | // Adjust this code if not the case. |
| 2521 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2522 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2523 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2524 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2525 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2526 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
| 2527 | |
| 2528 | // The exception is expected in rax. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2529 | if (!value.is(rax)) { |
| 2530 | movq(rax, value); |
| 2531 | } |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2532 | // Drop the stack pointer to the top of the top handler. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2533 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2534 | movq(rsp, ExternalOperand(handler_address)); |
| 2535 | // Restore the next handler. |
| 2536 | pop(ExternalOperand(handler_address)); |
| 2537 | |
| 2538 | // Remove the code object and state, compute the handler address in rdi. |
| 2539 | pop(rdi); // Code object. |
| 2540 | pop(rdx); // Offset and state. |
| 2541 | |
| 2542 | // Restore the context and frame pointer. |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2543 | pop(rsi); // Context. |
| 2544 | pop(rbp); // Frame pointer. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2545 | |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2546 | // If the handler is a JS frame, restore the context to the frame. |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2547 | // (kind == ENTRY) == (rbp == 0) == (rsi == 0), so we could test either |
| 2548 | // rbp or rsi. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2549 | Label skip; |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2550 | testq(rsi, rsi); |
| 2551 | j(zero, &skip, Label::kNear); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2552 | movq(Operand(rbp, StandardFrameConstants::kContextOffset), rsi); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2553 | bind(&skip); |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2554 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2555 | JumpToHandlerEntry(); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2556 | } |
| 2557 | |
| 2558 | |
| 2559 | void MacroAssembler::ThrowUncatchable(UncatchableExceptionType type, |
| 2560 | Register value) { |
whesse@chromium.org | 4acdc2c | 2011-08-15 13:01:23 +0000 | [diff] [blame] | 2561 | // Adjust this code if not the case. |
| 2562 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2563 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2564 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2565 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2566 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2567 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2568 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2569 | // The exception is expected in rax. |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2570 | if (type == OUT_OF_MEMORY) { |
| 2571 | // Set external caught exception to false. |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2572 | ExternalReference external_caught(Isolate::kExternalCaughtExceptionAddress, |
| 2573 | isolate()); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2574 | Set(rax, static_cast<int64_t>(false)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2575 | Store(external_caught, rax); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2576 | |
| 2577 | // Set pending exception and rax to out of memory exception. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2578 | ExternalReference pending_exception(Isolate::kPendingExceptionAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2579 | isolate()); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2580 | movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2581 | Store(pending_exception, rax); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2582 | } else if (!value.is(rax)) { |
| 2583 | movq(rax, value); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2584 | } |
| 2585 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2586 | // Drop the stack pointer to the top of the top stack handler. |
| 2587 | ExternalReference handler_address(Isolate::kHandlerAddress, isolate()); |
| 2588 | Load(rsp, handler_address); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2589 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2590 | // Unwind the handlers until the top ENTRY handler is found. |
| 2591 | Label fetch_next, check_kind; |
| 2592 | jmp(&check_kind, Label::kNear); |
| 2593 | bind(&fetch_next); |
| 2594 | movq(rsp, Operand(rsp, StackHandlerConstants::kNextOffset)); |
| 2595 | |
| 2596 | bind(&check_kind); |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2597 | STATIC_ASSERT(StackHandler::ENTRY == 0); |
| 2598 | testl(Operand(rsp, StackHandlerConstants::kStateOffset), |
| 2599 | Immediate(StackHandler::KindField::kMask)); |
| 2600 | j(not_zero, &fetch_next); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2601 | |
| 2602 | // Set the top handler address to next handler past the top ENTRY handler. |
| 2603 | pop(ExternalOperand(handler_address)); |
| 2604 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2605 | // Remove the code object and state, compute the handler address in rdi. |
| 2606 | pop(rdi); // Code object. |
| 2607 | pop(rdx); // Offset and state. |
| 2608 | |
| 2609 | // Clear the context pointer and frame pointer (0 was saved in the handler). |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2610 | pop(rsi); |
| 2611 | pop(rbp); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2612 | |
jkummerow@chromium.org | 04e4f1e | 2011-11-14 13:36:17 +0000 | [diff] [blame] | 2613 | JumpToHandlerEntry(); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2614 | } |
| 2615 | |
| 2616 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2617 | void MacroAssembler::Ret() { |
| 2618 | ret(0); |
| 2619 | } |
| 2620 | |
| 2621 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 2622 | void MacroAssembler::Ret(int bytes_dropped, Register scratch) { |
| 2623 | if (is_uint16(bytes_dropped)) { |
| 2624 | ret(bytes_dropped); |
| 2625 | } else { |
| 2626 | pop(scratch); |
| 2627 | addq(rsp, Immediate(bytes_dropped)); |
| 2628 | push(scratch); |
| 2629 | ret(0); |
| 2630 | } |
| 2631 | } |
| 2632 | |
| 2633 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2634 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2635 | fucomip(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 2636 | fstp(0); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2637 | } |
| 2638 | |
| 2639 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2640 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 2641 | InstanceType type, |
| 2642 | Register map) { |
| 2643 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2644 | CmpInstanceType(map, type); |
| 2645 | } |
| 2646 | |
| 2647 | |
| 2648 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 2649 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 2650 | Immediate(static_cast<int8_t>(type))); |
| 2651 | } |
| 2652 | |
| 2653 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2654 | void MacroAssembler::CheckFastElements(Register map, |
| 2655 | Label* fail, |
| 2656 | Label::Distance distance) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2657 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2658 | STATIC_ASSERT(FAST_ELEMENTS == 1); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2659 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2660 | Immediate(Map::kMaximumBitField2FastElementValue)); |
| 2661 | j(above, fail, distance); |
| 2662 | } |
| 2663 | |
| 2664 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2665 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 2666 | Label* fail, |
| 2667 | Label::Distance distance) { |
| 2668 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2669 | STATIC_ASSERT(FAST_ELEMENTS == 1); |
| 2670 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2671 | Immediate(Map::kMaximumBitField2FastSmiOnlyElementValue)); |
| 2672 | j(below_equal, fail, distance); |
| 2673 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2674 | Immediate(Map::kMaximumBitField2FastElementValue)); |
| 2675 | j(above, fail, distance); |
| 2676 | } |
| 2677 | |
| 2678 | |
| 2679 | void MacroAssembler::CheckFastSmiOnlyElements(Register map, |
| 2680 | Label* fail, |
| 2681 | Label::Distance distance) { |
| 2682 | STATIC_ASSERT(FAST_SMI_ONLY_ELEMENTS == 0); |
| 2683 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2684 | Immediate(Map::kMaximumBitField2FastSmiOnlyElementValue)); |
| 2685 | j(above, fail, distance); |
| 2686 | } |
| 2687 | |
| 2688 | |
| 2689 | void MacroAssembler::StoreNumberToDoubleElements( |
| 2690 | Register maybe_number, |
| 2691 | Register elements, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2692 | Register index, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2693 | XMMRegister xmm_scratch, |
| 2694 | Label* fail) { |
| 2695 | Label smi_value, is_nan, maybe_nan, not_nan, have_double_value, done; |
| 2696 | |
| 2697 | JumpIfSmi(maybe_number, &smi_value, Label::kNear); |
| 2698 | |
| 2699 | CheckMap(maybe_number, |
| 2700 | isolate()->factory()->heap_number_map(), |
| 2701 | fail, |
| 2702 | DONT_DO_SMI_CHECK); |
| 2703 | |
| 2704 | // Double value, canonicalize NaN. |
| 2705 | uint32_t offset = HeapNumber::kValueOffset + sizeof(kHoleNanLower32); |
| 2706 | cmpl(FieldOperand(maybe_number, offset), |
| 2707 | Immediate(kNaNOrInfinityLowerBoundUpper32)); |
| 2708 | j(greater_equal, &maybe_nan, Label::kNear); |
| 2709 | |
| 2710 | bind(¬_nan); |
| 2711 | movsd(xmm_scratch, FieldOperand(maybe_number, HeapNumber::kValueOffset)); |
| 2712 | bind(&have_double_value); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2713 | movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2714 | xmm_scratch); |
| 2715 | jmp(&done); |
| 2716 | |
| 2717 | bind(&maybe_nan); |
| 2718 | // Could be NaN or Infinity. If fraction is not zero, it's NaN, otherwise |
| 2719 | // it's an Infinity, and the non-NaN code path applies. |
| 2720 | j(greater, &is_nan, Label::kNear); |
| 2721 | cmpl(FieldOperand(maybe_number, HeapNumber::kValueOffset), Immediate(0)); |
| 2722 | j(zero, ¬_nan); |
| 2723 | bind(&is_nan); |
| 2724 | // Convert all NaNs to the same canonical NaN value when they are stored in |
| 2725 | // the double array. |
| 2726 | Set(kScratchRegister, BitCast<uint64_t>( |
| 2727 | FixedDoubleArray::canonical_not_the_hole_nan_as_double())); |
| 2728 | movq(xmm_scratch, kScratchRegister); |
| 2729 | jmp(&have_double_value, Label::kNear); |
| 2730 | |
| 2731 | bind(&smi_value); |
| 2732 | // Value is a smi. convert to a double and store. |
| 2733 | // Preserve original value. |
| 2734 | SmiToInteger32(kScratchRegister, maybe_number); |
| 2735 | cvtlsi2sd(xmm_scratch, kScratchRegister); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2736 | movsd(FieldOperand(elements, index, times_8, FixedDoubleArray::kHeaderSize), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2737 | xmm_scratch); |
| 2738 | bind(&done); |
| 2739 | } |
| 2740 | |
| 2741 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2742 | void MacroAssembler::CheckMap(Register obj, |
| 2743 | Handle<Map> map, |
| 2744 | Label* fail, |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2745 | SmiCheckType smi_check_type) { |
| 2746 | if (smi_check_type == DO_SMI_CHECK) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2747 | JumpIfSmi(obj, fail); |
| 2748 | } |
| 2749 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2750 | j(not_equal, fail); |
| 2751 | } |
| 2752 | |
| 2753 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2754 | void MacroAssembler::ClampUint8(Register reg) { |
| 2755 | Label done; |
| 2756 | testl(reg, Immediate(0xFFFFFF00)); |
| 2757 | j(zero, &done, Label::kNear); |
| 2758 | setcc(negative, reg); // 1 if negative, 0 if positive. |
| 2759 | decb(reg); // 0 if negative, 255 if positive. |
| 2760 | bind(&done); |
| 2761 | } |
| 2762 | |
| 2763 | |
| 2764 | void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
| 2765 | XMMRegister temp_xmm_reg, |
| 2766 | Register result_reg, |
| 2767 | Register temp_reg) { |
| 2768 | Label done; |
| 2769 | Set(result_reg, 0); |
| 2770 | xorps(temp_xmm_reg, temp_xmm_reg); |
| 2771 | ucomisd(input_reg, temp_xmm_reg); |
| 2772 | j(below, &done, Label::kNear); |
| 2773 | uint64_t one_half = BitCast<uint64_t, double>(0.5); |
| 2774 | Set(temp_reg, one_half); |
| 2775 | movq(temp_xmm_reg, temp_reg); |
| 2776 | addsd(temp_xmm_reg, input_reg); |
| 2777 | cvttsd2si(result_reg, temp_xmm_reg); |
| 2778 | testl(result_reg, Immediate(0xFFFFFF00)); |
| 2779 | j(zero, &done, Label::kNear); |
| 2780 | Set(result_reg, 255); |
| 2781 | bind(&done); |
| 2782 | } |
| 2783 | |
| 2784 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2785 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 2786 | Register descriptors) { |
| 2787 | movq(descriptors, FieldOperand(map, |
| 2788 | Map::kInstanceDescriptorsOrBitField3Offset)); |
| 2789 | Label not_smi; |
| 2790 | JumpIfNotSmi(descriptors, ¬_smi, Label::kNear); |
| 2791 | Move(descriptors, isolate()->factory()->empty_descriptor_array()); |
| 2792 | bind(¬_smi); |
| 2793 | } |
| 2794 | |
| 2795 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2796 | void MacroAssembler::DispatchMap(Register obj, |
| 2797 | Handle<Map> map, |
| 2798 | Handle<Code> success, |
| 2799 | SmiCheckType smi_check_type) { |
| 2800 | Label fail; |
| 2801 | if (smi_check_type == DO_SMI_CHECK) { |
| 2802 | JumpIfSmi(obj, &fail); |
| 2803 | } |
| 2804 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2805 | j(equal, success, RelocInfo::CODE_TARGET); |
| 2806 | |
| 2807 | bind(&fail); |
| 2808 | } |
| 2809 | |
| 2810 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2811 | void MacroAssembler::AbortIfNotNumber(Register object) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2812 | Label ok; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2813 | Condition is_smi = CheckSmi(object); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2814 | j(is_smi, &ok, Label::kNear); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2815 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2816 | isolate()->factory()->heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2817 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2818 | bind(&ok); |
| 2819 | } |
| 2820 | |
| 2821 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2822 | void MacroAssembler::AbortIfSmi(Register object) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2823 | Condition is_smi = CheckSmi(object); |
| 2824 | Assert(NegateCondition(is_smi), "Operand is a smi"); |
| 2825 | } |
| 2826 | |
| 2827 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2828 | void MacroAssembler::AbortIfNotSmi(Register object) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2829 | Condition is_smi = CheckSmi(object); |
| 2830 | Assert(is_smi, "Operand is not a smi"); |
| 2831 | } |
| 2832 | |
| 2833 | |
| 2834 | void MacroAssembler::AbortIfNotSmi(const Operand& object) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2835 | Condition is_smi = CheckSmi(object); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2836 | Assert(is_smi, "Operand is not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2837 | } |
| 2838 | |
| 2839 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2840 | void MacroAssembler::AbortIfNotString(Register object) { |
| 2841 | testb(object, Immediate(kSmiTagMask)); |
| 2842 | Assert(not_equal, "Operand is not a string"); |
| 2843 | push(object); |
| 2844 | movq(object, FieldOperand(object, HeapObject::kMapOffset)); |
| 2845 | CmpInstanceType(object, FIRST_NONSTRING_TYPE); |
| 2846 | pop(object); |
| 2847 | Assert(below, "Operand is not a string"); |
| 2848 | } |
| 2849 | |
| 2850 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 2851 | void MacroAssembler::AbortIfNotRootValue(Register src, |
| 2852 | Heap::RootListIndex root_value_index, |
| 2853 | const char* message) { |
| 2854 | ASSERT(!src.is(kScratchRegister)); |
| 2855 | LoadRoot(kScratchRegister, root_value_index); |
| 2856 | cmpq(src, kScratchRegister); |
| 2857 | Check(equal, message); |
| 2858 | } |
| 2859 | |
| 2860 | |
| 2861 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2862 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 2863 | Register map, |
| 2864 | Register instance_type) { |
| 2865 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2866 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2867 | STATIC_ASSERT(kNotStringTag != 0); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2868 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 2869 | return zero; |
| 2870 | } |
| 2871 | |
| 2872 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2873 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 2874 | Register result, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2875 | Label* miss, |
| 2876 | bool miss_on_bound_function) { |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2877 | // Check that the receiver isn't a smi. |
| 2878 | testl(function, Immediate(kSmiTagMask)); |
| 2879 | j(zero, miss); |
| 2880 | |
| 2881 | // Check that the function really is a function. |
| 2882 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 2883 | j(not_equal, miss); |
| 2884 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2885 | if (miss_on_bound_function) { |
| 2886 | movq(kScratchRegister, |
| 2887 | FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 2888 | // It's not smi-tagged (stored in the top half of a smi-tagged 8-byte |
| 2889 | // field). |
| 2890 | TestBit(FieldOperand(kScratchRegister, |
| 2891 | SharedFunctionInfo::kCompilerHintsOffset), |
| 2892 | SharedFunctionInfo::kBoundFunction); |
| 2893 | j(not_zero, miss); |
| 2894 | } |
| 2895 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2896 | // Make sure that the function has an instance prototype. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2897 | Label non_instance; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2898 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 2899 | Immediate(1 << Map::kHasNonInstancePrototype)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2900 | j(not_zero, &non_instance, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2901 | |
| 2902 | // Get the prototype or initial map from the function. |
| 2903 | movq(result, |
| 2904 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2905 | |
| 2906 | // If the prototype or initial map is the hole, don't return it and |
| 2907 | // simply miss the cache instead. This will allow us to allocate a |
| 2908 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2909 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2910 | j(equal, miss); |
| 2911 | |
| 2912 | // 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] | 2913 | Label done; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2914 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2915 | j(not_equal, &done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2916 | |
| 2917 | // Get the prototype from the initial map. |
| 2918 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2919 | jmp(&done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2920 | |
| 2921 | // Non-instance prototype: Fetch prototype from constructor field |
| 2922 | // in initial map. |
| 2923 | bind(&non_instance); |
| 2924 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 2925 | |
| 2926 | // All done. |
| 2927 | bind(&done); |
| 2928 | } |
| 2929 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2930 | |
| 2931 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 2932 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2933 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2934 | movl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2935 | } |
| 2936 | } |
| 2937 | |
| 2938 | |
| 2939 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 2940 | ASSERT(value > 0); |
| 2941 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2942 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2943 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2944 | incl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2945 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2946 | addl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2947 | } |
| 2948 | } |
| 2949 | } |
| 2950 | |
| 2951 | |
| 2952 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 2953 | ASSERT(value > 0); |
| 2954 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2955 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2956 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2957 | decl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2958 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2959 | subl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2960 | } |
| 2961 | } |
| 2962 | } |
| 2963 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 2964 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2965 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2966 | void MacroAssembler::DebugBreak() { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 2967 | Set(rax, 0); // No arguments. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2968 | LoadAddress(rbx, ExternalReference(Runtime::kDebugBreak, isolate())); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2969 | CEntryStub ces(1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2970 | ASSERT(AllowThisStubCall(&ces)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2971 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2972 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2973 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2974 | |
| 2975 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2976 | void MacroAssembler::SetCallKind(Register dst, CallKind call_kind) { |
| 2977 | // This macro takes the dst register to make the code more readable |
| 2978 | // at the call sites. However, the dst register has to be rcx to |
| 2979 | // follow the calling convention which requires the call type to be |
| 2980 | // in rcx. |
| 2981 | ASSERT(dst.is(rcx)); |
| 2982 | if (call_kind == CALL_AS_FUNCTION) { |
| 2983 | LoadSmiConstant(dst, Smi::FromInt(1)); |
| 2984 | } else { |
| 2985 | LoadSmiConstant(dst, Smi::FromInt(0)); |
| 2986 | } |
| 2987 | } |
| 2988 | |
| 2989 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2990 | void MacroAssembler::InvokeCode(Register code, |
| 2991 | const ParameterCount& expected, |
| 2992 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2993 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2994 | const CallWrapper& call_wrapper, |
| 2995 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2996 | // You can't call a function without a valid frame. |
| 2997 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 2998 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2999 | Label done; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3000 | InvokePrologue(expected, |
| 3001 | actual, |
| 3002 | Handle<Code>::null(), |
| 3003 | code, |
| 3004 | &done, |
| 3005 | flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3006 | Label::kNear, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3007 | call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3008 | call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3009 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3010 | call_wrapper.BeforeCall(CallSize(code)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3011 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3012 | call(code); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3013 | call_wrapper.AfterCall(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3014 | } else { |
| 3015 | ASSERT(flag == JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3016 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3017 | jmp(code); |
| 3018 | } |
| 3019 | bind(&done); |
| 3020 | } |
| 3021 | |
| 3022 | |
| 3023 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 3024 | const ParameterCount& expected, |
| 3025 | const ParameterCount& actual, |
| 3026 | RelocInfo::Mode rmode, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3027 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3028 | const CallWrapper& call_wrapper, |
| 3029 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3030 | // You can't call a function without a valid frame. |
| 3031 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3032 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3033 | Label done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3034 | Register dummy = rax; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3035 | InvokePrologue(expected, |
| 3036 | actual, |
| 3037 | code, |
| 3038 | dummy, |
| 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 | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3047 | Call(code, rmode); |
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 | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3052 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3053 | } |
| 3054 | bind(&done); |
| 3055 | } |
| 3056 | |
| 3057 | |
| 3058 | void MacroAssembler::InvokeFunction(Register function, |
| 3059 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3060 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3061 | const CallWrapper& call_wrapper, |
| 3062 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3063 | // You can't call a function without a valid frame. |
| 3064 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3065 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3066 | ASSERT(function.is(rdi)); |
| 3067 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 3068 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 3069 | movsxlq(rbx, |
| 3070 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 3071 | // 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] | 3072 | // the executable code. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 3073 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3074 | |
| 3075 | ParameterCount expected(rbx); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3076 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3077 | } |
| 3078 | |
| 3079 | |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 3080 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3081 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 3082 | InvokeFlag flag, |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 3083 | const CallWrapper& call_wrapper, |
| 3084 | CallKind call_kind) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3085 | // You can't call a function without a valid frame. |
| 3086 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3087 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3088 | // Get the function and setup the context. |
ricow@chromium.org | 64e3a4b | 2011-12-13 08:07:27 +0000 | [diff] [blame^] | 3089 | LoadHeapObject(rdi, function); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3090 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 3091 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 3092 | // We call indirectly through the code field in the function to |
| 3093 | // allow recompilation to take effect without changing any of the |
| 3094 | // call sites. |
| 3095 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
| 3096 | ParameterCount expected(function->shared()->formal_parameter_count()); |
| 3097 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3098 | } |
| 3099 | |
| 3100 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3101 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 3102 | const ParameterCount& actual, |
| 3103 | Handle<Code> code_constant, |
| 3104 | Register code_register, |
| 3105 | Label* done, |
| 3106 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3107 | Label::Distance near_jump, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3108 | const CallWrapper& call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3109 | CallKind call_kind) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3110 | bool definitely_matches = false; |
| 3111 | Label invoke; |
| 3112 | if (expected.is_immediate()) { |
| 3113 | ASSERT(actual.is_immediate()); |
| 3114 | if (expected.immediate() == actual.immediate()) { |
| 3115 | definitely_matches = true; |
| 3116 | } else { |
| 3117 | Set(rax, actual.immediate()); |
| 3118 | if (expected.immediate() == |
| 3119 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| 3120 | // Don't worry about adapting arguments for built-ins that |
| 3121 | // don't want that done. Skip adaption code by making it look |
| 3122 | // like we have a match between expected and actual number of |
| 3123 | // arguments. |
| 3124 | definitely_matches = true; |
| 3125 | } else { |
| 3126 | Set(rbx, expected.immediate()); |
| 3127 | } |
| 3128 | } |
| 3129 | } else { |
| 3130 | if (actual.is_immediate()) { |
| 3131 | // Expected is in register, actual is immediate. This is the |
| 3132 | // case when we invoke function values without going through the |
| 3133 | // IC mechanism. |
| 3134 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 3135 | j(equal, &invoke, Label::kNear); |
| 3136 | ASSERT(expected.reg().is(rbx)); |
| 3137 | Set(rax, actual.immediate()); |
| 3138 | } else if (!expected.reg().is(actual.reg())) { |
| 3139 | // Both expected and actual are in (different) registers. This |
| 3140 | // is the case when we invoke functions using call and apply. |
| 3141 | cmpq(expected.reg(), actual.reg()); |
| 3142 | j(equal, &invoke, Label::kNear); |
| 3143 | ASSERT(actual.reg().is(rax)); |
| 3144 | ASSERT(expected.reg().is(rbx)); |
| 3145 | } |
| 3146 | } |
| 3147 | |
| 3148 | if (!definitely_matches) { |
| 3149 | Handle<Code> adaptor = isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| 3150 | if (!code_constant.is_null()) { |
| 3151 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 3152 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 3153 | } else if (!code_register.is(rdx)) { |
| 3154 | movq(rdx, code_register); |
| 3155 | } |
| 3156 | |
| 3157 | if (flag == CALL_FUNCTION) { |
| 3158 | call_wrapper.BeforeCall(CallSize(adaptor)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3159 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3160 | Call(adaptor, RelocInfo::CODE_TARGET); |
| 3161 | call_wrapper.AfterCall(); |
| 3162 | jmp(done, near_jump); |
| 3163 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3164 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3165 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 3166 | } |
| 3167 | bind(&invoke); |
| 3168 | } |
| 3169 | } |
| 3170 | |
| 3171 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3172 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 3173 | push(rbp); |
| 3174 | movq(rbp, rsp); |
| 3175 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3176 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3177 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 3178 | push(kScratchRegister); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3179 | if (emit_debug_code()) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3180 | movq(kScratchRegister, |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3181 | isolate()->factory()->undefined_value(), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3182 | RelocInfo::EMBEDDED_OBJECT); |
| 3183 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 3184 | Check(not_equal, "code object not properly patched"); |
| 3185 | } |
| 3186 | } |
| 3187 | |
| 3188 | |
| 3189 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3190 | if (emit_debug_code()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3191 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3192 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 3193 | Check(equal, "stack frame types must match"); |
| 3194 | } |
| 3195 | movq(rsp, rbp); |
| 3196 | pop(rbp); |
| 3197 | } |
| 3198 | |
| 3199 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3200 | void MacroAssembler::EnterExitFramePrologue(bool save_rax) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3201 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3202 | // 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] | 3203 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 3204 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 3205 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 3206 | push(rbp); |
| 3207 | movq(rbp, rsp); |
| 3208 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3209 | // 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] | 3210 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3211 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 3212 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 3213 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3214 | |
| 3215 | // Save the frame pointer and the context in top. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3216 | if (save_rax) { |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3217 | movq(r14, rax); // Backup rax in callee-save register. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3218 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3219 | |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3220 | Store(ExternalReference(Isolate::kCEntryFPAddress, isolate()), rbp); |
| 3221 | Store(ExternalReference(Isolate::kContextAddress, isolate()), rsi); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3222 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3223 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3224 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3225 | void MacroAssembler::EnterExitFrameEpilogue(int arg_stack_space, |
| 3226 | bool save_doubles) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3227 | #ifdef _WIN64 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3228 | const int kShadowSpace = 4; |
| 3229 | arg_stack_space += kShadowSpace; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3230 | #endif |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3231 | // Optionally save all XMM registers. |
| 3232 | if (save_doubles) { |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3233 | int space = XMMRegister::kNumRegisters * kDoubleSize + |
| 3234 | arg_stack_space * kPointerSize; |
| 3235 | subq(rsp, Immediate(space)); |
| 3236 | int offset = -2 * kPointerSize; |
| 3237 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3238 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3239 | movsd(Operand(rbp, offset - ((i + 1) * kDoubleSize)), reg); |
| 3240 | } |
| 3241 | } else if (arg_stack_space > 0) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3242 | subq(rsp, Immediate(arg_stack_space * kPointerSize)); |
| 3243 | } |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3244 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3245 | // Get the required frame alignment for the OS. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3246 | const int kFrameAlignment = OS::ActivationFrameAlignment(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3247 | if (kFrameAlignment > 0) { |
| 3248 | ASSERT(IsPowerOf2(kFrameAlignment)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 3249 | ASSERT(is_int8(kFrameAlignment)); |
| 3250 | and_(rsp, Immediate(-kFrameAlignment)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3251 | } |
| 3252 | |
| 3253 | // Patch the saved entry sp. |
| 3254 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 3255 | } |
| 3256 | |
| 3257 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3258 | void MacroAssembler::EnterExitFrame(int arg_stack_space, bool save_doubles) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3259 | EnterExitFramePrologue(true); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3260 | |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3261 | // 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] | 3262 | // so it must be retained across the C-call. |
| 3263 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3264 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3265 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3266 | EnterExitFrameEpilogue(arg_stack_space, save_doubles); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3267 | } |
| 3268 | |
| 3269 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3270 | void MacroAssembler::EnterApiExitFrame(int arg_stack_space) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3271 | EnterExitFramePrologue(false); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3272 | EnterExitFrameEpilogue(arg_stack_space, false); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3273 | } |
| 3274 | |
| 3275 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3276 | void MacroAssembler::LeaveExitFrame(bool save_doubles) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3277 | // Registers: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3278 | // r15 : argv |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3279 | if (save_doubles) { |
| 3280 | int offset = -2 * kPointerSize; |
| 3281 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3282 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3283 | movsd(reg, Operand(rbp, offset - ((i + 1) * kDoubleSize))); |
| 3284 | } |
| 3285 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3286 | // Get the return address from the stack and restore the frame pointer. |
| 3287 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 3288 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 3289 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3290 | // Drop everything up to and including the arguments and the receiver |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3291 | // from the caller stack. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3292 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3293 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3294 | // Push the return address to get ready to return. |
| 3295 | push(rcx); |
| 3296 | |
| 3297 | LeaveExitFrameEpilogue(); |
| 3298 | } |
| 3299 | |
| 3300 | |
| 3301 | void MacroAssembler::LeaveApiExitFrame() { |
| 3302 | movq(rsp, rbp); |
| 3303 | pop(rbp); |
| 3304 | |
| 3305 | LeaveExitFrameEpilogue(); |
| 3306 | } |
| 3307 | |
| 3308 | |
| 3309 | void MacroAssembler::LeaveExitFrameEpilogue() { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3310 | // Restore current context from top and clear it in debug mode. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3311 | ExternalReference context_address(Isolate::kContextAddress, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3312 | Operand context_operand = ExternalOperand(context_address); |
| 3313 | movq(rsi, context_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3314 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3315 | movq(context_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3316 | #endif |
| 3317 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3318 | // Clear the top frame. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3319 | ExternalReference c_entry_fp_address(Isolate::kCEntryFPAddress, |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3320 | isolate()); |
| 3321 | Operand c_entry_fp_operand = ExternalOperand(c_entry_fp_address); |
| 3322 | movq(c_entry_fp_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3323 | } |
| 3324 | |
| 3325 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3326 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 3327 | Register scratch, |
| 3328 | Label* miss) { |
| 3329 | Label same_contexts; |
| 3330 | |
| 3331 | ASSERT(!holder_reg.is(scratch)); |
| 3332 | ASSERT(!scratch.is(kScratchRegister)); |
| 3333 | // Load current lexical context from the stack frame. |
| 3334 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 3335 | |
| 3336 | // When generating debug code, make sure the lexical context is set. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3337 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3338 | cmpq(scratch, Immediate(0)); |
| 3339 | Check(not_equal, "we should not have an empty lexical context"); |
| 3340 | } |
| 3341 | // Load the global context of the current context. |
| 3342 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 3343 | movq(scratch, FieldOperand(scratch, offset)); |
| 3344 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 3345 | |
| 3346 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3347 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3348 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3349 | isolate()->factory()->global_context_map()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3350 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3351 | } |
| 3352 | |
| 3353 | // Check if both contexts are the same. |
| 3354 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 3355 | j(equal, &same_contexts); |
| 3356 | |
| 3357 | // Compare security tokens. |
| 3358 | // Check that the security token in the calling global object is |
| 3359 | // compatible with the security token in the receiving global |
| 3360 | // object. |
| 3361 | |
| 3362 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3363 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3364 | // Preserve original value of holder_reg. |
| 3365 | push(holder_reg); |
| 3366 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3367 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3368 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 3369 | |
| 3370 | // Read the first word and compare to global_context_map(), |
| 3371 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3372 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3373 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3374 | pop(holder_reg); |
| 3375 | } |
| 3376 | |
| 3377 | movq(kScratchRegister, |
| 3378 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3379 | int token_offset = |
| 3380 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3381 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 3382 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 3383 | j(not_equal, miss); |
| 3384 | |
| 3385 | bind(&same_contexts); |
| 3386 | } |
| 3387 | |
| 3388 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3389 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 3390 | Register elements, |
| 3391 | Register key, |
| 3392 | Register r0, |
| 3393 | Register r1, |
| 3394 | Register r2, |
| 3395 | Register result) { |
| 3396 | // Register use: |
| 3397 | // |
| 3398 | // elements - holds the slow-case elements of the receiver on entry. |
| 3399 | // Unchanged unless 'result' is the same register. |
| 3400 | // |
| 3401 | // key - holds the smi key on entry. |
| 3402 | // Unchanged unless 'result' is the same register. |
| 3403 | // |
| 3404 | // Scratch registers: |
| 3405 | // |
| 3406 | // r0 - holds the untagged key on entry and holds the hash once computed. |
| 3407 | // |
| 3408 | // r1 - used to hold the capacity mask of the dictionary |
| 3409 | // |
| 3410 | // r2 - used for the index into the dictionary. |
| 3411 | // |
| 3412 | // result - holds the result on exit if the load succeeded. |
| 3413 | // Allowed to be the same as 'key' or 'result'. |
| 3414 | // Unchanged on bailout so 'key' or 'result' can be used |
| 3415 | // in further computation. |
| 3416 | |
| 3417 | Label done; |
| 3418 | |
| 3419 | // Compute the hash code from the untagged key. This must be kept in sync |
| 3420 | // with ComputeIntegerHash in utils.h. |
| 3421 | // |
| 3422 | // hash = ~hash + (hash << 15); |
| 3423 | movl(r1, r0); |
| 3424 | notl(r0); |
| 3425 | shll(r1, Immediate(15)); |
| 3426 | addl(r0, r1); |
| 3427 | // hash = hash ^ (hash >> 12); |
| 3428 | movl(r1, r0); |
| 3429 | shrl(r1, Immediate(12)); |
| 3430 | xorl(r0, r1); |
| 3431 | // hash = hash + (hash << 2); |
| 3432 | leal(r0, Operand(r0, r0, times_4, 0)); |
| 3433 | // hash = hash ^ (hash >> 4); |
| 3434 | movl(r1, r0); |
| 3435 | shrl(r1, Immediate(4)); |
| 3436 | xorl(r0, r1); |
| 3437 | // hash = hash * 2057; |
| 3438 | imull(r0, r0, Immediate(2057)); |
| 3439 | // hash = hash ^ (hash >> 16); |
| 3440 | movl(r1, r0); |
| 3441 | shrl(r1, Immediate(16)); |
| 3442 | xorl(r0, r1); |
| 3443 | |
| 3444 | // Compute capacity mask. |
| 3445 | SmiToInteger32(r1, |
| 3446 | FieldOperand(elements, NumberDictionary::kCapacityOffset)); |
| 3447 | decl(r1); |
| 3448 | |
| 3449 | // Generate an unrolled loop that performs a few probes before giving up. |
| 3450 | const int kProbes = 4; |
| 3451 | for (int i = 0; i < kProbes; i++) { |
| 3452 | // Use r2 for index calculations and keep the hash intact in r0. |
| 3453 | movq(r2, r0); |
| 3454 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3455 | if (i > 0) { |
| 3456 | addl(r2, Immediate(NumberDictionary::GetProbeOffset(i))); |
| 3457 | } |
| 3458 | and_(r2, r1); |
| 3459 | |
| 3460 | // Scale the index by multiplying by the entry size. |
| 3461 | ASSERT(NumberDictionary::kEntrySize == 3); |
| 3462 | lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3 |
| 3463 | |
| 3464 | // Check if the key matches. |
| 3465 | cmpq(key, FieldOperand(elements, |
| 3466 | r2, |
| 3467 | times_pointer_size, |
| 3468 | NumberDictionary::kElementsStartOffset)); |
| 3469 | if (i != (kProbes - 1)) { |
| 3470 | j(equal, &done); |
| 3471 | } else { |
| 3472 | j(not_equal, miss); |
| 3473 | } |
| 3474 | } |
| 3475 | |
| 3476 | bind(&done); |
| 3477 | // Check that the value is a normal propety. |
| 3478 | const int kDetailsOffset = |
| 3479 | NumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
| 3480 | ASSERT_EQ(NORMAL, 0); |
| 3481 | Test(FieldOperand(elements, r2, times_pointer_size, kDetailsOffset), |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 3482 | Smi::FromInt(PropertyDetails::TypeField::kMask)); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3483 | j(not_zero, miss); |
| 3484 | |
| 3485 | // Get the value at the masked, scaled index. |
| 3486 | const int kValueOffset = |
| 3487 | NumberDictionary::kElementsStartOffset + kPointerSize; |
| 3488 | movq(result, FieldOperand(elements, r2, times_pointer_size, kValueOffset)); |
| 3489 | } |
| 3490 | |
| 3491 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3492 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3493 | Register scratch, |
| 3494 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3495 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3496 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3497 | |
| 3498 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3499 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3500 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3501 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3502 | #ifdef DEBUG |
| 3503 | // Assert that result actually contains top on entry. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3504 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
| 3505 | cmpq(result, top_operand); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3506 | Check(equal, "Unexpected allocation top"); |
| 3507 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3508 | return; |
| 3509 | } |
| 3510 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3511 | // Move address of new object to result. Use scratch register if available, |
| 3512 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 3513 | if (scratch.is_valid()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3514 | LoadAddress(scratch, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3515 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3516 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3517 | Load(result, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3518 | } |
| 3519 | } |
| 3520 | |
| 3521 | |
| 3522 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 3523 | Register scratch) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3524 | if (emit_debug_code()) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3525 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 3526 | Check(zero, "Unaligned allocation in new space"); |
| 3527 | } |
| 3528 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3529 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3530 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3531 | |
| 3532 | // Update new top. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3533 | if (scratch.is_valid()) { |
| 3534 | // Scratch already contains address of allocation top. |
| 3535 | movq(Operand(scratch, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3536 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3537 | Store(new_space_allocation_top, result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3538 | } |
| 3539 | } |
| 3540 | |
| 3541 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3542 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 3543 | Register result, |
| 3544 | Register result_end, |
| 3545 | Register scratch, |
| 3546 | Label* gc_required, |
| 3547 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3548 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3549 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3550 | // Trash the registers to simulate an allocation failure. |
| 3551 | movl(result, Immediate(0x7091)); |
| 3552 | if (result_end.is_valid()) { |
| 3553 | movl(result_end, Immediate(0x7191)); |
| 3554 | } |
| 3555 | if (scratch.is_valid()) { |
| 3556 | movl(scratch, Immediate(0x7291)); |
| 3557 | } |
| 3558 | } |
| 3559 | jmp(gc_required); |
| 3560 | return; |
| 3561 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3562 | ASSERT(!result.is(result_end)); |
| 3563 | |
| 3564 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3565 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3566 | |
| 3567 | // Calculate new top and bail out if new space is exhausted. |
| 3568 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3569 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3570 | |
| 3571 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 3572 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3573 | if (!top_reg.is(result)) { |
| 3574 | movq(top_reg, result); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3575 | } |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3576 | addq(top_reg, Immediate(object_size)); |
| 3577 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3578 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3579 | cmpq(top_reg, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3580 | j(above, gc_required); |
| 3581 | |
| 3582 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3583 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3584 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3585 | if (top_reg.is(result)) { |
| 3586 | if ((flags & TAG_OBJECT) != 0) { |
| 3587 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 3588 | } else { |
| 3589 | subq(result, Immediate(object_size)); |
| 3590 | } |
| 3591 | } else if ((flags & TAG_OBJECT) != 0) { |
| 3592 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3593 | addq(result, Immediate(kHeapObjectTag)); |
| 3594 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3595 | } |
| 3596 | |
| 3597 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3598 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 3599 | ScaleFactor element_size, |
| 3600 | Register element_count, |
| 3601 | Register result, |
| 3602 | Register result_end, |
| 3603 | Register scratch, |
| 3604 | Label* gc_required, |
| 3605 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3606 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3607 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3608 | // Trash the registers to simulate an allocation failure. |
| 3609 | movl(result, Immediate(0x7091)); |
| 3610 | movl(result_end, Immediate(0x7191)); |
| 3611 | if (scratch.is_valid()) { |
| 3612 | movl(scratch, Immediate(0x7291)); |
| 3613 | } |
| 3614 | // Register element_count is not modified by the function. |
| 3615 | } |
| 3616 | jmp(gc_required); |
| 3617 | return; |
| 3618 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3619 | ASSERT(!result.is(result_end)); |
| 3620 | |
| 3621 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3622 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3623 | |
| 3624 | // Calculate new top and bail out if new space is exhausted. |
| 3625 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3626 | ExternalReference::new_space_allocation_limit_address(isolate()); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3627 | |
| 3628 | // We assume that element_count*element_size + header_size does not |
| 3629 | // overflow. |
| 3630 | lea(result_end, Operand(element_count, element_size, header_size)); |
| 3631 | addq(result_end, result); |
| 3632 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3633 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3634 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3635 | j(above, gc_required); |
| 3636 | |
| 3637 | // Update allocation top. |
| 3638 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3639 | |
| 3640 | // Tag the result if requested. |
| 3641 | if ((flags & TAG_OBJECT) != 0) { |
| 3642 | addq(result, Immediate(kHeapObjectTag)); |
| 3643 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3644 | } |
| 3645 | |
| 3646 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3647 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 3648 | Register result, |
| 3649 | Register result_end, |
| 3650 | Register scratch, |
| 3651 | Label* gc_required, |
| 3652 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3653 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3654 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3655 | // Trash the registers to simulate an allocation failure. |
| 3656 | movl(result, Immediate(0x7091)); |
| 3657 | movl(result_end, Immediate(0x7191)); |
| 3658 | if (scratch.is_valid()) { |
| 3659 | movl(scratch, Immediate(0x7291)); |
| 3660 | } |
| 3661 | // object_size is left unchanged by this function. |
| 3662 | } |
| 3663 | jmp(gc_required); |
| 3664 | return; |
| 3665 | } |
| 3666 | ASSERT(!result.is(result_end)); |
| 3667 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3668 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3669 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3670 | |
| 3671 | // Calculate new top and bail out if new space is exhausted. |
| 3672 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3673 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3674 | if (!object_size.is(result_end)) { |
| 3675 | movq(result_end, object_size); |
| 3676 | } |
| 3677 | addq(result_end, result); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3678 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3679 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3680 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3681 | j(above, gc_required); |
| 3682 | |
| 3683 | // Update allocation top. |
| 3684 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3685 | |
| 3686 | // Tag the result if requested. |
| 3687 | if ((flags & TAG_OBJECT) != 0) { |
| 3688 | addq(result, Immediate(kHeapObjectTag)); |
| 3689 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3690 | } |
| 3691 | |
| 3692 | |
| 3693 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 3694 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3695 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3696 | |
| 3697 | // Make sure the object has no tag before resetting top. |
| 3698 | and_(object, Immediate(~kHeapObjectTagMask)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3699 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3700 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3701 | cmpq(object, top_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3702 | Check(below, "Undo allocation of non allocated memory"); |
| 3703 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3704 | movq(top_operand, object); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3705 | } |
| 3706 | |
| 3707 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3708 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3709 | Register scratch, |
| 3710 | Label* gc_required) { |
| 3711 | // Allocate heap number in new space. |
| 3712 | AllocateInNewSpace(HeapNumber::kSize, |
| 3713 | result, |
| 3714 | scratch, |
| 3715 | no_reg, |
| 3716 | gc_required, |
| 3717 | TAG_OBJECT); |
| 3718 | |
| 3719 | // Set the map. |
| 3720 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 3721 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3722 | } |
| 3723 | |
| 3724 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3725 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 3726 | Register length, |
| 3727 | Register scratch1, |
| 3728 | Register scratch2, |
| 3729 | Register scratch3, |
| 3730 | Label* gc_required) { |
| 3731 | // Calculate the number of bytes needed for the characters in the string while |
| 3732 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3733 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 3734 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3735 | ASSERT(kShortSize == 2); |
| 3736 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3737 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 3738 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3739 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3740 | if (kHeaderAlignment > 0) { |
| 3741 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3742 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3743 | |
| 3744 | // Allocate two byte string in new space. |
| 3745 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 3746 | times_1, |
| 3747 | scratch1, |
| 3748 | result, |
| 3749 | scratch2, |
| 3750 | scratch3, |
| 3751 | gc_required, |
| 3752 | TAG_OBJECT); |
| 3753 | |
| 3754 | // Set the map, length and hash field. |
| 3755 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 3756 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3757 | Integer32ToSmi(scratch1, length); |
| 3758 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3759 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3760 | Immediate(String::kEmptyHashField)); |
| 3761 | } |
| 3762 | |
| 3763 | |
| 3764 | void MacroAssembler::AllocateAsciiString(Register result, |
| 3765 | Register length, |
| 3766 | Register scratch1, |
| 3767 | Register scratch2, |
| 3768 | Register scratch3, |
| 3769 | Label* gc_required) { |
| 3770 | // Calculate the number of bytes needed for the characters in the string while |
| 3771 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3772 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 3773 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3774 | movl(scratch1, length); |
| 3775 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3776 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3777 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3778 | if (kHeaderAlignment > 0) { |
| 3779 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3780 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3781 | |
| 3782 | // Allocate ascii string in new space. |
| 3783 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 3784 | times_1, |
| 3785 | scratch1, |
| 3786 | result, |
| 3787 | scratch2, |
| 3788 | scratch3, |
| 3789 | gc_required, |
| 3790 | TAG_OBJECT); |
| 3791 | |
| 3792 | // Set the map, length and hash field. |
| 3793 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 3794 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3795 | Integer32ToSmi(scratch1, length); |
| 3796 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3797 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3798 | Immediate(String::kEmptyHashField)); |
| 3799 | } |
| 3800 | |
| 3801 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3802 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3803 | Register scratch1, |
| 3804 | Register scratch2, |
| 3805 | Label* gc_required) { |
| 3806 | // Allocate heap number in new space. |
| 3807 | AllocateInNewSpace(ConsString::kSize, |
| 3808 | result, |
| 3809 | scratch1, |
| 3810 | scratch2, |
| 3811 | gc_required, |
| 3812 | TAG_OBJECT); |
| 3813 | |
| 3814 | // Set the map. The other fields are left uninitialized. |
| 3815 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 3816 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3817 | } |
| 3818 | |
| 3819 | |
| 3820 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 3821 | Register scratch1, |
| 3822 | Register scratch2, |
| 3823 | Label* gc_required) { |
| 3824 | // Allocate heap number in new space. |
| 3825 | AllocateInNewSpace(ConsString::kSize, |
| 3826 | result, |
| 3827 | scratch1, |
| 3828 | scratch2, |
| 3829 | gc_required, |
| 3830 | TAG_OBJECT); |
| 3831 | |
| 3832 | // Set the map. The other fields are left uninitialized. |
| 3833 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 3834 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3835 | } |
| 3836 | |
| 3837 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3838 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 3839 | Register scratch1, |
| 3840 | Register scratch2, |
| 3841 | Label* gc_required) { |
| 3842 | // Allocate heap number in new space. |
| 3843 | AllocateInNewSpace(SlicedString::kSize, |
| 3844 | result, |
| 3845 | scratch1, |
| 3846 | scratch2, |
| 3847 | gc_required, |
| 3848 | TAG_OBJECT); |
| 3849 | |
| 3850 | // Set the map. The other fields are left uninitialized. |
| 3851 | LoadRoot(kScratchRegister, Heap::kSlicedStringMapRootIndex); |
| 3852 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3853 | } |
| 3854 | |
| 3855 | |
| 3856 | void MacroAssembler::AllocateAsciiSlicedString(Register result, |
| 3857 | Register scratch1, |
| 3858 | Register scratch2, |
| 3859 | Label* gc_required) { |
| 3860 | // Allocate heap number in new space. |
| 3861 | AllocateInNewSpace(SlicedString::kSize, |
| 3862 | result, |
| 3863 | scratch1, |
| 3864 | scratch2, |
| 3865 | gc_required, |
| 3866 | TAG_OBJECT); |
| 3867 | |
| 3868 | // Set the map. The other fields are left uninitialized. |
| 3869 | LoadRoot(kScratchRegister, Heap::kSlicedAsciiStringMapRootIndex); |
| 3870 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3871 | } |
| 3872 | |
| 3873 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 3874 | // Copy memory, byte-by-byte, from source to destination. Not optimized for |
| 3875 | // long or aligned copies. The contents of scratch and length are destroyed. |
| 3876 | // Destination is incremented by length, source, length and scratch are |
| 3877 | // clobbered. |
| 3878 | // A simpler loop is faster on small copies, but slower on large ones. |
| 3879 | // The cld() instruction must have been emitted, to set the direction flag(), |
| 3880 | // before calling this function. |
| 3881 | void MacroAssembler::CopyBytes(Register destination, |
| 3882 | Register source, |
| 3883 | Register length, |
| 3884 | int min_length, |
| 3885 | Register scratch) { |
| 3886 | ASSERT(min_length >= 0); |
| 3887 | if (FLAG_debug_code) { |
| 3888 | cmpl(length, Immediate(min_length)); |
| 3889 | Assert(greater_equal, "Invalid min_length"); |
| 3890 | } |
| 3891 | Label loop, done, short_string, short_loop; |
| 3892 | |
| 3893 | const int kLongStringLimit = 20; |
| 3894 | if (min_length <= kLongStringLimit) { |
| 3895 | cmpl(length, Immediate(kLongStringLimit)); |
| 3896 | j(less_equal, &short_string); |
| 3897 | } |
| 3898 | |
| 3899 | ASSERT(source.is(rsi)); |
| 3900 | ASSERT(destination.is(rdi)); |
| 3901 | ASSERT(length.is(rcx)); |
| 3902 | |
| 3903 | // Because source is 8-byte aligned in our uses of this function, |
| 3904 | // we keep source aligned for the rep movs operation by copying the odd bytes |
| 3905 | // at the end of the ranges. |
| 3906 | movq(scratch, length); |
| 3907 | shrl(length, Immediate(3)); |
| 3908 | repmovsq(); |
| 3909 | // Move remaining bytes of length. |
| 3910 | andl(scratch, Immediate(0x7)); |
| 3911 | movq(length, Operand(source, scratch, times_1, -8)); |
| 3912 | movq(Operand(destination, scratch, times_1, -8), length); |
| 3913 | addq(destination, scratch); |
| 3914 | |
| 3915 | if (min_length <= kLongStringLimit) { |
| 3916 | jmp(&done); |
| 3917 | |
| 3918 | bind(&short_string); |
| 3919 | if (min_length == 0) { |
| 3920 | testl(length, length); |
| 3921 | j(zero, &done); |
| 3922 | } |
| 3923 | lea(scratch, Operand(destination, length, times_1, 0)); |
| 3924 | |
| 3925 | bind(&short_loop); |
| 3926 | movb(length, Operand(source, 0)); |
| 3927 | movb(Operand(destination, 0), length); |
| 3928 | incq(source); |
| 3929 | incq(destination); |
| 3930 | cmpq(destination, scratch); |
| 3931 | j(not_equal, &short_loop); |
| 3932 | |
| 3933 | bind(&done); |
| 3934 | } |
| 3935 | } |
| 3936 | |
| 3937 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3938 | void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| 3939 | Register end_offset, |
| 3940 | Register filler) { |
| 3941 | Label loop, entry; |
| 3942 | jmp(&entry); |
| 3943 | bind(&loop); |
| 3944 | movq(Operand(start_offset, 0), filler); |
| 3945 | addq(start_offset, Immediate(kPointerSize)); |
| 3946 | bind(&entry); |
| 3947 | cmpq(start_offset, end_offset); |
| 3948 | j(less, &loop); |
| 3949 | } |
| 3950 | |
| 3951 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3952 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 3953 | if (context_chain_length > 0) { |
| 3954 | // 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] | 3955 | movq(dst, Operand(rsi, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3956 | for (int i = 1; i < context_chain_length; i++) { |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 3957 | movq(dst, Operand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3958 | } |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 3959 | } else { |
| 3960 | // Slot is in the current function context. Move it into the |
| 3961 | // destination register in case we store into it (the write barrier |
| 3962 | // cannot be allowed to destroy the context in rsi). |
| 3963 | movq(dst, rsi); |
| 3964 | } |
| 3965 | |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 3966 | // We should not have found a with context by walking the context |
| 3967 | // chain (i.e., the static scope chain and runtime context chain do |
| 3968 | // not agree). A variable occurring in such a scope should have |
| 3969 | // slot type LOOKUP and not CONTEXT. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3970 | if (emit_debug_code()) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 3971 | CompareRoot(FieldOperand(dst, HeapObject::kMapOffset), |
| 3972 | Heap::kWithContextMapRootIndex); |
| 3973 | Check(not_equal, "Variable resolved to with context."); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3974 | } |
| 3975 | } |
| 3976 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3977 | #ifdef _WIN64 |
| 3978 | static const int kRegisterPassedArguments = 4; |
| 3979 | #else |
| 3980 | static const int kRegisterPassedArguments = 6; |
| 3981 | #endif |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3982 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 3983 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| 3984 | // Load the global or builtins object from the current context. |
| 3985 | movq(function, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 3986 | // Load the global context from the global or builtins object. |
| 3987 | movq(function, FieldOperand(function, GlobalObject::kGlobalContextOffset)); |
| 3988 | // Load the function from the global context. |
| 3989 | movq(function, Operand(function, Context::SlotOffset(index))); |
| 3990 | } |
| 3991 | |
| 3992 | |
| 3993 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 3994 | Register map) { |
| 3995 | // Load the initial map. The global functions all have initial maps. |
| 3996 | movq(map, FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3997 | if (emit_debug_code()) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 3998 | Label ok, fail; |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 3999 | CheckMap(map, isolate()->factory()->meta_map(), &fail, DO_SMI_CHECK); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 4000 | jmp(&ok); |
| 4001 | bind(&fail); |
| 4002 | Abort("Global functions must have initial map"); |
| 4003 | bind(&ok); |
| 4004 | } |
| 4005 | } |
| 4006 | |
| 4007 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4008 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4009 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 4010 | // including the ones passed in registers, and space is always allocated for |
| 4011 | // the four register arguments even if the function takes fewer than four |
| 4012 | // arguments. |
| 4013 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 4014 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4015 | ASSERT(num_arguments >= 0); |
| 4016 | #ifdef _WIN64 |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4017 | const int kMinimumStackSlots = kRegisterPassedArguments; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4018 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 4019 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4020 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4021 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 4022 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4023 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4024 | } |
| 4025 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 4026 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4027 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 4028 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 4029 | ASSERT(frame_alignment != 0); |
| 4030 | ASSERT(num_arguments >= 0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4031 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4032 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 4033 | movq(kScratchRegister, rsp); |
| 4034 | ASSERT(IsPowerOf2(frame_alignment)); |
| 4035 | int argument_slots_on_stack = |
| 4036 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 4037 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 4038 | and_(rsp, Immediate(-frame_alignment)); |
| 4039 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 4040 | } |
| 4041 | |
| 4042 | |
| 4043 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 4044 | int num_arguments) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 4045 | LoadAddress(rax, function); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4046 | CallCFunction(rax, num_arguments); |
| 4047 | } |
| 4048 | |
| 4049 | |
| 4050 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4051 | ASSERT(has_frame()); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4052 | // Check stack alignment. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 4053 | if (emit_debug_code()) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 4054 | CheckStackAlignment(); |
| 4055 | } |
| 4056 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 4057 | call(function); |
| 4058 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 4059 | ASSERT(num_arguments >= 0); |
| 4060 | int argument_slots_on_stack = |
| 4061 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 4062 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 4063 | } |
| 4064 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 4065 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4066 | bool AreAliased(Register r1, Register r2, Register r3, Register r4) { |
| 4067 | if (r1.is(r2)) return true; |
| 4068 | if (r1.is(r3)) return true; |
| 4069 | if (r1.is(r4)) return true; |
| 4070 | if (r2.is(r3)) return true; |
| 4071 | if (r2.is(r4)) return true; |
| 4072 | if (r3.is(r4)) return true; |
| 4073 | return false; |
| 4074 | } |
| 4075 | |
| 4076 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 4077 | CodePatcher::CodePatcher(byte* address, int size) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 4078 | : address_(address), |
| 4079 | size_(size), |
| 4080 | masm_(Isolate::Current(), address, size + Assembler::kGap) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 4081 | // Create a new macro assembler pointing to the address of the code to patch. |
| 4082 | // The size is adjusted with kGap on order for the assembler to generate size |
| 4083 | // bytes of instructions without failing with buffer size constraints. |
| 4084 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 4085 | } |
| 4086 | |
| 4087 | |
| 4088 | CodePatcher::~CodePatcher() { |
| 4089 | // Indicate that code has changed. |
| 4090 | CPU::FlushICache(address_, size_); |
| 4091 | |
| 4092 | // Check that the code was patched as expected. |
| 4093 | ASSERT(masm_.pc_ == address_ + size_); |
| 4094 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 4095 | } |
| 4096 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4097 | |
| 4098 | void MacroAssembler::CheckPageFlag( |
| 4099 | Register object, |
| 4100 | Register scratch, |
| 4101 | int mask, |
| 4102 | Condition cc, |
| 4103 | Label* condition_met, |
| 4104 | Label::Distance condition_met_distance) { |
| 4105 | ASSERT(cc == zero || cc == not_zero); |
| 4106 | if (scratch.is(object)) { |
| 4107 | and_(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4108 | } else { |
| 4109 | movq(scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4110 | and_(scratch, object); |
| 4111 | } |
| 4112 | if (mask < (1 << kBitsPerByte)) { |
| 4113 | testb(Operand(scratch, MemoryChunk::kFlagsOffset), |
| 4114 | Immediate(static_cast<uint8_t>(mask))); |
| 4115 | } else { |
| 4116 | testl(Operand(scratch, MemoryChunk::kFlagsOffset), Immediate(mask)); |
| 4117 | } |
| 4118 | j(cc, condition_met, condition_met_distance); |
| 4119 | } |
| 4120 | |
| 4121 | |
| 4122 | void MacroAssembler::JumpIfBlack(Register object, |
| 4123 | Register bitmap_scratch, |
| 4124 | Register mask_scratch, |
| 4125 | Label* on_black, |
| 4126 | Label::Distance on_black_distance) { |
| 4127 | ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, rcx)); |
| 4128 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 4129 | |
| 4130 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 4131 | // The mask_scratch register contains a 1 at the position of the first bit |
| 4132 | // and a 0 at all other positions, including the position of the second bit. |
| 4133 | movq(rcx, mask_scratch); |
| 4134 | // Make rcx into a mask that covers both marking bits using the operation |
| 4135 | // rcx = mask | (mask << 1). |
| 4136 | lea(rcx, Operand(mask_scratch, mask_scratch, times_2, 0)); |
| 4137 | // Note that we are using a 4-byte aligned 8-byte load. |
| 4138 | and_(rcx, Operand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 4139 | cmpq(mask_scratch, rcx); |
| 4140 | j(equal, on_black, on_black_distance); |
| 4141 | } |
| 4142 | |
| 4143 | |
| 4144 | // Detect some, but not all, common pointer-free objects. This is used by the |
| 4145 | // incremental write barrier which doesn't care about oddballs (they are always |
| 4146 | // marked black immediately so this code is not hit). |
| 4147 | void MacroAssembler::JumpIfDataObject( |
| 4148 | Register value, |
| 4149 | Register scratch, |
| 4150 | Label* not_data_object, |
| 4151 | Label::Distance not_data_object_distance) { |
| 4152 | Label is_data_object; |
| 4153 | movq(scratch, FieldOperand(value, HeapObject::kMapOffset)); |
| 4154 | CompareRoot(scratch, Heap::kHeapNumberMapRootIndex); |
| 4155 | j(equal, &is_data_object, Label::kNear); |
| 4156 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 4157 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 4158 | // If it's a string and it's not a cons string then it's an object containing |
| 4159 | // no GC pointers. |
| 4160 | testb(FieldOperand(scratch, Map::kInstanceTypeOffset), |
| 4161 | Immediate(kIsIndirectStringMask | kIsNotStringMask)); |
| 4162 | j(not_zero, not_data_object, not_data_object_distance); |
| 4163 | bind(&is_data_object); |
| 4164 | } |
| 4165 | |
| 4166 | |
| 4167 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 4168 | Register bitmap_reg, |
| 4169 | Register mask_reg) { |
| 4170 | ASSERT(!AreAliased(addr_reg, bitmap_reg, mask_reg, rcx)); |
| 4171 | movq(bitmap_reg, addr_reg); |
| 4172 | // Sign extended 32 bit immediate. |
| 4173 | and_(bitmap_reg, Immediate(~Page::kPageAlignmentMask)); |
| 4174 | movq(rcx, addr_reg); |
| 4175 | int shift = |
| 4176 | Bitmap::kBitsPerCellLog2 + kPointerSizeLog2 - Bitmap::kBytesPerCellLog2; |
| 4177 | shrl(rcx, Immediate(shift)); |
| 4178 | and_(rcx, |
| 4179 | Immediate((Page::kPageAlignmentMask >> shift) & |
| 4180 | ~(Bitmap::kBytesPerCell - 1))); |
| 4181 | |
| 4182 | addq(bitmap_reg, rcx); |
| 4183 | movq(rcx, addr_reg); |
| 4184 | shrl(rcx, Immediate(kPointerSizeLog2)); |
| 4185 | and_(rcx, Immediate((1 << Bitmap::kBitsPerCellLog2) - 1)); |
| 4186 | movl(mask_reg, Immediate(1)); |
| 4187 | shl_cl(mask_reg); |
| 4188 | } |
| 4189 | |
| 4190 | |
| 4191 | void MacroAssembler::EnsureNotWhite( |
| 4192 | Register value, |
| 4193 | Register bitmap_scratch, |
| 4194 | Register mask_scratch, |
| 4195 | Label* value_is_white_and_not_data, |
| 4196 | Label::Distance distance) { |
| 4197 | ASSERT(!AreAliased(value, bitmap_scratch, mask_scratch, rcx)); |
| 4198 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 4199 | |
| 4200 | // If the value is black or grey we don't need to do anything. |
| 4201 | ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
| 4202 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 4203 | ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0); |
| 4204 | ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
| 4205 | |
| 4206 | Label done; |
| 4207 | |
| 4208 | // Since both black and grey have a 1 in the first position and white does |
| 4209 | // not have a 1 there we only need to check one bit. |
| 4210 | testq(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4211 | j(not_zero, &done, Label::kNear); |
| 4212 | |
| 4213 | if (FLAG_debug_code) { |
| 4214 | // Check for impossible bit pattern. |
| 4215 | Label ok; |
| 4216 | push(mask_scratch); |
| 4217 | // shl. May overflow making the check conservative. |
| 4218 | addq(mask_scratch, mask_scratch); |
| 4219 | testq(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4220 | j(zero, &ok, Label::kNear); |
| 4221 | int3(); |
| 4222 | bind(&ok); |
| 4223 | pop(mask_scratch); |
| 4224 | } |
| 4225 | |
| 4226 | // Value is white. We check whether it is data that doesn't need scanning. |
| 4227 | // Currently only checks for HeapNumber and non-cons strings. |
| 4228 | Register map = rcx; // Holds map while checking type. |
| 4229 | Register length = rcx; // Holds length of object after checking type. |
| 4230 | Label not_heap_number; |
| 4231 | Label is_data_object; |
| 4232 | |
| 4233 | // Check for heap-number |
| 4234 | movq(map, FieldOperand(value, HeapObject::kMapOffset)); |
| 4235 | CompareRoot(map, Heap::kHeapNumberMapRootIndex); |
| 4236 | j(not_equal, ¬_heap_number, Label::kNear); |
| 4237 | movq(length, Immediate(HeapNumber::kSize)); |
| 4238 | jmp(&is_data_object, Label::kNear); |
| 4239 | |
| 4240 | bind(¬_heap_number); |
| 4241 | // Check for strings. |
| 4242 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 4243 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 4244 | // If it's a string and it's not a cons string then it's an object containing |
| 4245 | // no GC pointers. |
| 4246 | Register instance_type = rcx; |
| 4247 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 4248 | testb(instance_type, Immediate(kIsIndirectStringMask | kIsNotStringMask)); |
| 4249 | j(not_zero, value_is_white_and_not_data); |
| 4250 | // It's a non-indirect (non-cons and non-slice) string. |
| 4251 | // If it's external, the length is just ExternalString::kSize. |
| 4252 | // Otherwise it's String::kHeaderSize + string->length() * (1 or 2). |
| 4253 | Label not_external; |
| 4254 | // External strings are the only ones with the kExternalStringTag bit |
| 4255 | // set. |
| 4256 | ASSERT_EQ(0, kSeqStringTag & kExternalStringTag); |
| 4257 | ASSERT_EQ(0, kConsStringTag & kExternalStringTag); |
| 4258 | testb(instance_type, Immediate(kExternalStringTag)); |
| 4259 | j(zero, ¬_external, Label::kNear); |
| 4260 | movq(length, Immediate(ExternalString::kSize)); |
| 4261 | jmp(&is_data_object, Label::kNear); |
| 4262 | |
| 4263 | bind(¬_external); |
| 4264 | // Sequential string, either ASCII or UC16. |
| 4265 | ASSERT(kAsciiStringTag == 0x04); |
| 4266 | and_(length, Immediate(kStringEncodingMask)); |
| 4267 | xor_(length, Immediate(kStringEncodingMask)); |
| 4268 | addq(length, Immediate(0x04)); |
| 4269 | // Value now either 4 (if ASCII) or 8 (if UC16), i.e. char-size shifted by 2. |
| 4270 | imul(length, FieldOperand(value, String::kLengthOffset)); |
| 4271 | shr(length, Immediate(2 + kSmiTagSize + kSmiShiftSize)); |
| 4272 | addq(length, Immediate(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| 4273 | and_(length, Immediate(~kObjectAlignmentMask)); |
| 4274 | |
| 4275 | bind(&is_data_object); |
| 4276 | // Value is a data object, and it is white. Mark it black. Since we know |
| 4277 | // that the object is white we can make it black by flipping one bit. |
| 4278 | or_(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch); |
| 4279 | |
| 4280 | and_(bitmap_scratch, Immediate(~Page::kPageAlignmentMask)); |
| 4281 | addl(Operand(bitmap_scratch, MemoryChunk::kLiveBytesOffset), length); |
| 4282 | |
| 4283 | bind(&done); |
| 4284 | } |
| 4285 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 4286 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 4287 | |
| 4288 | #endif // V8_TARGET_ARCH_X64 |