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), |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 47 | root_array_available_(true) { |
| 48 | if (isolate() != NULL) { |
| 49 | code_object_ = Handle<Object>(isolate()->heap()->undefined_value(), |
| 50 | isolate()); |
| 51 | } |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 55 | static intptr_t RootRegisterDelta(ExternalReference other, Isolate* isolate) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 56 | Address roots_register_value = kRootRegisterBias + |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 57 | reinterpret_cast<Address>(isolate->heap()->roots_address()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 58 | intptr_t delta = other.address() - roots_register_value; |
| 59 | return delta; |
| 60 | } |
| 61 | |
| 62 | |
| 63 | Operand MacroAssembler::ExternalOperand(ExternalReference target, |
| 64 | Register scratch) { |
| 65 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 66 | intptr_t delta = RootRegisterDelta(target, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 67 | if (is_int32(delta)) { |
| 68 | Serializer::TooLateToEnableNow(); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 69 | return Operand(kRootRegister, static_cast<int32_t>(delta)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 70 | } |
| 71 | } |
| 72 | movq(scratch, target); |
| 73 | return Operand(scratch, 0); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | void MacroAssembler::Load(Register destination, ExternalReference source) { |
| 78 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 79 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 80 | if (is_int32(delta)) { |
| 81 | Serializer::TooLateToEnableNow(); |
| 82 | movq(destination, Operand(kRootRegister, static_cast<int32_t>(delta))); |
| 83 | return; |
| 84 | } |
| 85 | } |
| 86 | // Safe code. |
| 87 | if (destination.is(rax)) { |
| 88 | load_rax(source); |
| 89 | } else { |
| 90 | movq(kScratchRegister, source); |
| 91 | movq(destination, Operand(kScratchRegister, 0)); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | |
| 96 | void MacroAssembler::Store(ExternalReference destination, Register source) { |
| 97 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 98 | intptr_t delta = RootRegisterDelta(destination, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 99 | if (is_int32(delta)) { |
| 100 | Serializer::TooLateToEnableNow(); |
| 101 | movq(Operand(kRootRegister, static_cast<int32_t>(delta)), source); |
| 102 | return; |
| 103 | } |
| 104 | } |
| 105 | // Safe code. |
| 106 | if (source.is(rax)) { |
| 107 | store_rax(destination); |
| 108 | } else { |
| 109 | movq(kScratchRegister, destination); |
| 110 | movq(Operand(kScratchRegister, 0), source); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | |
| 115 | void MacroAssembler::LoadAddress(Register destination, |
| 116 | ExternalReference source) { |
| 117 | if (root_array_available_ && !Serializer::enabled()) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 118 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 119 | if (is_int32(delta)) { |
| 120 | Serializer::TooLateToEnableNow(); |
| 121 | lea(destination, Operand(kRootRegister, static_cast<int32_t>(delta))); |
| 122 | return; |
| 123 | } |
| 124 | } |
| 125 | // Safe code. |
| 126 | movq(destination, source); |
| 127 | } |
| 128 | |
| 129 | |
| 130 | int MacroAssembler::LoadAddressSize(ExternalReference source) { |
| 131 | if (root_array_available_ && !Serializer::enabled()) { |
| 132 | // This calculation depends on the internals of LoadAddress. |
| 133 | // It's correctness is ensured by the asserts in the Call |
| 134 | // instruction below. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 135 | intptr_t delta = RootRegisterDelta(source, isolate()); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 136 | if (is_int32(delta)) { |
| 137 | Serializer::TooLateToEnableNow(); |
| 138 | // Operand is lea(scratch, Operand(kRootRegister, delta)); |
| 139 | // Opcodes : REX.W 8D ModRM Disp8/Disp32 - 4 or 7. |
| 140 | int size = 4; |
| 141 | if (!is_int8(static_cast<int32_t>(delta))) { |
| 142 | size += 3; // Need full four-byte displacement in lea. |
| 143 | } |
| 144 | return size; |
| 145 | } |
| 146 | } |
| 147 | // Size of movq(destination, src); |
| 148 | return 10; |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 149 | } |
| 150 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 151 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 152 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 153 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 154 | movq(destination, Operand(kRootRegister, |
| 155 | (index << kPointerSizeLog2) - kRootRegisterBias)); |
| 156 | } |
| 157 | |
| 158 | |
| 159 | void MacroAssembler::LoadRootIndexed(Register destination, |
| 160 | Register variable_offset, |
| 161 | int fixed_offset) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 162 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 163 | movq(destination, |
| 164 | Operand(kRootRegister, |
| 165 | variable_offset, times_pointer_size, |
| 166 | (fixed_offset << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 170 | void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 171 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 172 | movq(Operand(kRootRegister, (index << kPointerSizeLog2) - kRootRegisterBias), |
| 173 | source); |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 177 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 178 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 179 | push(Operand(kRootRegister, (index << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 183 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 184 | ASSERT(root_array_available_); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 185 | cmpq(with, Operand(kRootRegister, |
| 186 | (index << kPointerSizeLog2) - kRootRegisterBias)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 187 | } |
| 188 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 189 | |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 190 | void MacroAssembler::CompareRoot(const Operand& with, |
| 191 | Heap::RootListIndex index) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 192 | ASSERT(root_array_available_); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame] | 193 | ASSERT(!with.AddressUsesRegister(kScratchRegister)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 194 | LoadRoot(kScratchRegister, index); |
| 195 | cmpq(with, kScratchRegister); |
| 196 | } |
| 197 | |
| 198 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 199 | void MacroAssembler::RecordWriteHelper(Register object, |
| 200 | Register addr, |
| 201 | Register scratch) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 202 | if (emit_debug_code()) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 203 | // Check that the object is not in new space. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 204 | Label not_in_new_space; |
| 205 | InNewSpace(object, scratch, not_equal, ¬_in_new_space, Label::kNear); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 206 | Abort("new-space object passed to RecordWriteHelper"); |
| 207 | bind(¬_in_new_space); |
| 208 | } |
| 209 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 210 | // Compute the page start address from the heap object pointer, and reuse |
| 211 | // the 'object' register for it. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 212 | and_(object, Immediate(~Page::kPageAlignmentMask)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 213 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 214 | // Compute number of region covering addr. See Page::GetRegionNumberForAddress |
| 215 | // method for more details. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 216 | shrl(addr, Immediate(Page::kRegionSizeLog2)); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 217 | andl(addr, Immediate(Page::kPageAlignmentMask >> Page::kRegionSizeLog2)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 218 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 219 | // Set dirty mark for region. |
| 220 | bts(Operand(object, Page::kDirtyFlagOffset), addr); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 224 | void MacroAssembler::InNewSpace(Register object, |
| 225 | Register scratch, |
| 226 | Condition cc, |
| 227 | Label* branch, |
| 228 | Label::Distance near_jump) { |
| 229 | if (Serializer::enabled()) { |
| 230 | // Can't do arithmetic on external references if it might get serialized. |
| 231 | // The mask isn't really an address. We load it as an external reference in |
| 232 | // case the size of the new space is different between the snapshot maker |
| 233 | // and the running system. |
| 234 | if (scratch.is(object)) { |
| 235 | movq(kScratchRegister, ExternalReference::new_space_mask(isolate())); |
| 236 | and_(scratch, kScratchRegister); |
| 237 | } else { |
| 238 | movq(scratch, ExternalReference::new_space_mask(isolate())); |
| 239 | and_(scratch, object); |
| 240 | } |
| 241 | movq(kScratchRegister, ExternalReference::new_space_start(isolate())); |
| 242 | cmpq(scratch, kScratchRegister); |
| 243 | j(cc, branch, near_jump); |
| 244 | } else { |
| 245 | ASSERT(is_int32(static_cast<int64_t>(HEAP->NewSpaceMask()))); |
| 246 | intptr_t new_space_start = |
| 247 | reinterpret_cast<intptr_t>(HEAP->NewSpaceStart()); |
| 248 | movq(kScratchRegister, -new_space_start, RelocInfo::NONE); |
| 249 | if (scratch.is(object)) { |
| 250 | addq(scratch, kScratchRegister); |
| 251 | } else { |
| 252 | lea(scratch, Operand(object, kScratchRegister, times_1, 0)); |
| 253 | } |
| 254 | and_(scratch, Immediate(static_cast<int32_t>(HEAP->NewSpaceMask()))); |
| 255 | j(cc, branch, near_jump); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 260 | void MacroAssembler::RecordWrite(Register object, |
| 261 | int offset, |
| 262 | Register value, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 263 | Register index) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 264 | // The compiled code assumes that record write doesn't change the |
| 265 | // context register, so we check that none of the clobbered |
| 266 | // registers are rsi. |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 267 | ASSERT(!object.is(rsi) && !value.is(rsi) && !index.is(rsi)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 268 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 269 | // 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] | 270 | // catch stores of smis and stores into the young generation. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 271 | Label done; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 272 | JumpIfSmi(value, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 273 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 274 | RecordWriteNonSmi(object, offset, value, index); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 275 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 276 | |
| 277 | // Clobber all input registers when running with the debug-code flag |
| 278 | // turned on to provoke errors. This clobbering repeats the |
| 279 | // clobbering done inside RecordWriteNonSmi but it's necessary to |
| 280 | // avoid having the fast case for smis leave the registers |
| 281 | // unchanged. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 282 | if (emit_debug_code()) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 283 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 284 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 285 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 286 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 290 | void MacroAssembler::RecordWrite(Register object, |
| 291 | Register address, |
| 292 | Register value) { |
| 293 | // The compiled code assumes that record write doesn't change the |
| 294 | // context register, so we check that none of the clobbered |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 295 | // registers are rsi. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 296 | ASSERT(!object.is(rsi) && !value.is(rsi) && !address.is(rsi)); |
| 297 | |
| 298 | // 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] | 299 | // catch stores of smis and stores into the young generation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 300 | Label done; |
| 301 | JumpIfSmi(value, &done); |
| 302 | |
| 303 | InNewSpace(object, value, equal, &done); |
| 304 | |
| 305 | RecordWriteHelper(object, address, value); |
| 306 | |
| 307 | bind(&done); |
| 308 | |
| 309 | // Clobber all input registers when running with the debug-code flag |
| 310 | // turned on to provoke errors. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 311 | if (emit_debug_code()) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 312 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 313 | movq(address, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 314 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 315 | } |
| 316 | } |
| 317 | |
| 318 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 319 | void MacroAssembler::RecordWriteNonSmi(Register object, |
| 320 | int offset, |
| 321 | Register scratch, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 322 | Register index) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 323 | Label done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 324 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 325 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 326 | Label okay; |
| 327 | JumpIfNotSmi(object, &okay, Label::kNear); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 328 | Abort("MacroAssembler::RecordWriteNonSmi cannot deal with smis"); |
| 329 | bind(&okay); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 330 | |
| 331 | if (offset == 0) { |
| 332 | // index must be int32. |
| 333 | Register tmp = index.is(rax) ? rbx : rax; |
| 334 | push(tmp); |
| 335 | movl(tmp, index); |
| 336 | cmpq(tmp, index); |
| 337 | Check(equal, "Index register for RecordWrite must be untagged int32."); |
| 338 | pop(tmp); |
| 339 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 340 | } |
| 341 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 342 | // Test that the object address is not in the new space. We cannot |
| 343 | // update page dirty marks for new space pages. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 344 | InNewSpace(object, scratch, equal, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 345 | |
whesse@chromium.org | e88a9ed | 2010-04-15 15:07:46 +0000 | [diff] [blame] | 346 | // The offset is relative to a tagged or untagged HeapObject pointer, |
| 347 | // so either offset or offset + kHeapObjectTag must be a |
| 348 | // multiple of kPointerSize. |
| 349 | ASSERT(IsAligned(offset, kPointerSize) || |
| 350 | IsAligned(offset + kHeapObjectTag, kPointerSize)); |
| 351 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 352 | Register dst = index; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 353 | if (offset != 0) { |
| 354 | lea(dst, Operand(object, offset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 355 | } else { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 356 | // array access: calculate the destination address in the same manner as |
| 357 | // KeyedStoreIC::GenerateGeneric. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 358 | lea(dst, FieldOperand(object, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 359 | index, |
| 360 | times_pointer_size, |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 361 | FixedArray::kHeaderSize)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 362 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 363 | RecordWriteHelper(object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 364 | |
| 365 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 366 | |
| 367 | // Clobber all input registers when running with the debug-code flag |
| 368 | // turned on to provoke errors. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 369 | if (emit_debug_code()) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 370 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 371 | movq(scratch, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 372 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 373 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 374 | } |
| 375 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 376 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 377 | if (emit_debug_code()) Check(cc, msg); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 381 | void MacroAssembler::AssertFastElements(Register elements) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 382 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 383 | Label ok; |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 384 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 385 | Heap::kFixedArrayMapRootIndex); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 386 | j(equal, &ok, Label::kNear); |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 387 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 388 | Heap::kFixedCOWArrayMapRootIndex); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 389 | j(equal, &ok, Label::kNear); |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 390 | Abort("JSObject with fast elements map has slow elements"); |
| 391 | bind(&ok); |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 396 | void MacroAssembler::Check(Condition cc, const char* msg) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 397 | Label L; |
| 398 | j(cc, &L, Label::kNear); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 399 | Abort(msg); |
| 400 | // will not return here |
| 401 | bind(&L); |
| 402 | } |
| 403 | |
| 404 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 405 | void MacroAssembler::CheckStackAlignment() { |
| 406 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 407 | int frame_alignment_mask = frame_alignment - 1; |
| 408 | if (frame_alignment > kPointerSize) { |
| 409 | ASSERT(IsPowerOf2(frame_alignment)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 410 | Label alignment_as_expected; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 411 | testq(rsp, Immediate(frame_alignment_mask)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 412 | j(zero, &alignment_as_expected, Label::kNear); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 413 | // Abort if stack is not aligned. |
| 414 | int3(); |
| 415 | bind(&alignment_as_expected); |
| 416 | } |
| 417 | } |
| 418 | |
| 419 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 420 | void MacroAssembler::NegativeZeroTest(Register result, |
| 421 | Register op, |
| 422 | Label* then_label) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 423 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 424 | testl(result, result); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 425 | j(not_zero, &ok, Label::kNear); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 426 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 427 | j(sign, then_label); |
| 428 | bind(&ok); |
| 429 | } |
| 430 | |
| 431 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 432 | void MacroAssembler::Abort(const char* msg) { |
| 433 | // We want to pass the msg string like a smi to avoid GC |
| 434 | // problems, however msg is not guaranteed to be aligned |
| 435 | // properly. Instead, we pass an aligned pointer that is |
| 436 | // a proper v8 smi, but also pass the alignment difference |
| 437 | // from the real pointer as a smi. |
| 438 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 439 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 440 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 441 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 442 | #ifdef DEBUG |
| 443 | if (msg != NULL) { |
| 444 | RecordComment("Abort message: "); |
| 445 | RecordComment(msg); |
| 446 | } |
| 447 | #endif |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 448 | // Disable stub call restrictions to always allow calls to abort. |
kmillikin@chromium.org | d2c22f0 | 2011-01-10 08:15:37 +0000 | [diff] [blame] | 449 | AllowStubCallsScope allow_scope(this, true); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 450 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 451 | push(rax); |
| 452 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 453 | push(kScratchRegister); |
| 454 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 455 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 456 | RelocInfo::NONE); |
| 457 | push(kScratchRegister); |
| 458 | CallRuntime(Runtime::kAbort, 2); |
| 459 | // will not return here |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 460 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 464 | void MacroAssembler::CallStub(CodeStub* stub, unsigned ast_id) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 465 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 466 | Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 470 | MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 471 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 472 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 473 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 474 | call(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 475 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 476 | } |
| 477 | return result; |
| 478 | } |
| 479 | |
| 480 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 481 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 482 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 483 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 484 | } |
| 485 | |
| 486 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 487 | MaybeObject* MacroAssembler::TryTailCallStub(CodeStub* stub) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 488 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 489 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 490 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 491 | jmp(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 492 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 493 | } |
| 494 | return result; |
| 495 | } |
| 496 | |
| 497 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 498 | void MacroAssembler::StubReturn(int argc) { |
| 499 | ASSERT(argc >= 1 && generating_stub()); |
| 500 | ret((argc - 1) * kPointerSize); |
| 501 | } |
| 502 | |
| 503 | |
| 504 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 505 | if (num_arguments > 0) { |
| 506 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 507 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 508 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 512 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 513 | // The assert checks that the constants for the maximum number of digits |
| 514 | // for an array index cached in the hash field and the number of bits |
| 515 | // reserved for it does not conflict. |
| 516 | ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| 517 | (1 << String::kArrayIndexValueBits)); |
| 518 | // We want the smi-tagged index in key. Even if we subsequently go to |
| 519 | // the slow case, converting the key to a smi is always valid. |
| 520 | // key: string key |
| 521 | // hash: key's hash field, including its array index value. |
| 522 | and_(hash, Immediate(String::kArrayIndexValueMask)); |
| 523 | shr(hash, Immediate(String::kHashShift)); |
| 524 | // Here we actually clobber the key which will be used if calling into |
| 525 | // runtime later. However as the new key is the numeric value of a string key |
| 526 | // there is no difference in using either key. |
| 527 | Integer32ToSmi(index, hash); |
| 528 | } |
| 529 | |
| 530 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 531 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 532 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 533 | } |
| 534 | |
| 535 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 536 | void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 537 | const Runtime::Function* function = Runtime::FunctionForId(id); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 538 | Set(rax, function->nargs); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 539 | LoadAddress(rbx, ExternalReference(function, isolate())); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 540 | CEntryStub ces(1); |
| 541 | ces.SaveDoubles(); |
| 542 | CallStub(&ces); |
| 543 | } |
| 544 | |
| 545 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 546 | MaybeObject* MacroAssembler::TryCallRuntime(Runtime::FunctionId id, |
| 547 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 548 | return TryCallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 549 | } |
| 550 | |
| 551 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 552 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
| 553 | int num_arguments) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 554 | // If the expected number of arguments of the runtime function is |
| 555 | // constant, we check that the actual number of arguments match the |
| 556 | // expectation. |
| 557 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 558 | IllegalOperation(num_arguments); |
| 559 | return; |
| 560 | } |
| 561 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 562 | // TODO(1236192): Most runtime routines don't need the number of |
| 563 | // arguments passed in because it is constant. At some point we |
| 564 | // should remove this need and make the runtime routine entry code |
| 565 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 566 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 567 | LoadAddress(rbx, ExternalReference(f, isolate())); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 568 | CEntryStub ces(f->result_size); |
| 569 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 573 | MaybeObject* MacroAssembler::TryCallRuntime(const Runtime::Function* f, |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 574 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 575 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 576 | IllegalOperation(num_arguments); |
| 577 | // Since we did not call the stub, there was no allocation failure. |
| 578 | // Return some non-failure object. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 579 | return HEAP->undefined_value(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | // TODO(1236192): Most runtime routines don't need the number of |
| 583 | // arguments passed in because it is constant. At some point we |
| 584 | // should remove this need and make the runtime routine entry code |
| 585 | // smarter. |
| 586 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 587 | LoadAddress(rbx, ExternalReference(f, isolate())); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 588 | CEntryStub ces(f->result_size); |
| 589 | return TryCallStub(&ces); |
| 590 | } |
| 591 | |
| 592 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 593 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 594 | int num_arguments) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 595 | Set(rax, num_arguments); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 596 | LoadAddress(rbx, ext); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 597 | |
| 598 | CEntryStub stub(1); |
| 599 | CallStub(&stub); |
| 600 | } |
| 601 | |
| 602 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 603 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 604 | int num_arguments, |
| 605 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 606 | // ----------- S t a t e ------------- |
| 607 | // -- rsp[0] : return address |
| 608 | // -- rsp[8] : argument num_arguments - 1 |
| 609 | // ... |
| 610 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 611 | // ----------------------------------- |
| 612 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 613 | // TODO(1236192): Most runtime routines don't need the number of |
| 614 | // arguments passed in because it is constant. At some point we |
| 615 | // should remove this need and make the runtime routine entry code |
| 616 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 617 | Set(rax, num_arguments); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 618 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 622 | MaybeObject* MacroAssembler::TryTailCallExternalReference( |
| 623 | const ExternalReference& ext, int num_arguments, int result_size) { |
| 624 | // ----------- S t a t e ------------- |
| 625 | // -- rsp[0] : return address |
| 626 | // -- rsp[8] : argument num_arguments - 1 |
| 627 | // ... |
| 628 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 629 | // ----------------------------------- |
| 630 | |
| 631 | // TODO(1236192): Most runtime routines don't need the number of |
| 632 | // arguments passed in because it is constant. At some point we |
| 633 | // should remove this need and make the runtime routine entry code |
| 634 | // smarter. |
| 635 | Set(rax, num_arguments); |
| 636 | return TryJumpToExternalReference(ext, result_size); |
| 637 | } |
| 638 | |
| 639 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 640 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 641 | int num_arguments, |
| 642 | int result_size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 643 | TailCallExternalReference(ExternalReference(fid, isolate()), |
| 644 | num_arguments, |
| 645 | result_size); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 649 | MaybeObject* MacroAssembler::TryTailCallRuntime(Runtime::FunctionId fid, |
| 650 | int num_arguments, |
| 651 | int result_size) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 652 | return TryTailCallExternalReference(ExternalReference(fid, isolate()), |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 653 | num_arguments, |
| 654 | result_size); |
| 655 | } |
| 656 | |
| 657 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 658 | static int Offset(ExternalReference ref0, ExternalReference ref1) { |
| 659 | int64_t offset = (ref0.address() - ref1.address()); |
| 660 | // Check that fits into int. |
| 661 | ASSERT(static_cast<int>(offset) == offset); |
| 662 | return static_cast<int>(offset); |
| 663 | } |
| 664 | |
| 665 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 666 | void MacroAssembler::PrepareCallApiFunction(int arg_stack_space) { |
| 667 | #ifdef _WIN64 |
| 668 | // We need to prepare a slot for result handle on stack and put |
| 669 | // a pointer to it into 1st arg register. |
| 670 | EnterApiExitFrame(arg_stack_space + 1); |
| 671 | |
| 672 | // rcx must be used to pass the pointer to the return value slot. |
| 673 | lea(rcx, StackSpaceOperand(arg_stack_space)); |
| 674 | #else |
| 675 | EnterApiExitFrame(arg_stack_space); |
| 676 | #endif |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 677 | } |
| 678 | |
| 679 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 680 | MaybeObject* MacroAssembler::TryCallApiFunctionAndReturn( |
| 681 | ApiFunction* function, int stack_space) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 682 | Label empty_result; |
| 683 | Label prologue; |
| 684 | Label promote_scheduled_exception; |
| 685 | Label delete_allocated_handles; |
| 686 | Label leave_exit_frame; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 687 | Label write_back; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 688 | |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 689 | Factory* factory = isolate()->factory(); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 690 | ExternalReference next_address = |
| 691 | ExternalReference::handle_scope_next_address(); |
| 692 | const int kNextOffset = 0; |
| 693 | const int kLimitOffset = Offset( |
| 694 | ExternalReference::handle_scope_limit_address(), |
| 695 | next_address); |
| 696 | const int kLevelOffset = Offset( |
| 697 | ExternalReference::handle_scope_level_address(), |
| 698 | next_address); |
| 699 | ExternalReference scheduled_exception_address = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 700 | ExternalReference::scheduled_exception_address(isolate()); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 701 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 702 | // Allocate HandleScope in callee-save registers. |
| 703 | Register prev_next_address_reg = r14; |
| 704 | Register prev_limit_reg = rbx; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 705 | Register base_reg = r15; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 706 | movq(base_reg, next_address); |
| 707 | movq(prev_next_address_reg, Operand(base_reg, kNextOffset)); |
| 708 | movq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 709 | addl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 710 | // Call the api function! |
| 711 | movq(rax, |
| 712 | reinterpret_cast<int64_t>(function->address()), |
| 713 | RelocInfo::RUNTIME_ENTRY); |
| 714 | call(rax); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 715 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 716 | #ifdef _WIN64 |
| 717 | // rax keeps a pointer to v8::Handle, unpack it. |
| 718 | movq(rax, Operand(rax, 0)); |
| 719 | #endif |
| 720 | // Check if the result handle holds 0. |
| 721 | testq(rax, rax); |
| 722 | j(zero, &empty_result); |
| 723 | // It was non-zero. Dereference to get the result value. |
| 724 | movq(rax, Operand(rax, 0)); |
| 725 | bind(&prologue); |
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 | // No more valid handles (the result handle was the last one). Restore |
| 728 | // previous handle scope. |
| 729 | subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 730 | movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
| 731 | cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 732 | j(not_equal, &delete_allocated_handles); |
| 733 | bind(&leave_exit_frame); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 734 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 735 | // Check if the function scheduled an exception. |
| 736 | movq(rsi, scheduled_exception_address); |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 737 | Cmp(Operand(rsi, 0), factory->the_hole_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 738 | j(not_equal, &promote_scheduled_exception); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 739 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 740 | LeaveApiExitFrame(); |
| 741 | ret(stack_space * kPointerSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 742 | |
| 743 | bind(&promote_scheduled_exception); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 744 | MaybeObject* result = TryTailCallRuntime(Runtime::kPromoteScheduledException, |
| 745 | 0, 1); |
| 746 | if (result->IsFailure()) { |
| 747 | return result; |
| 748 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 749 | |
| 750 | bind(&empty_result); |
| 751 | // It was zero; the result is undefined. |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 752 | Move(rax, factory->undefined_value()); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 753 | jmp(&prologue); |
| 754 | |
| 755 | // HandleScope limit has changed. Delete allocated extensions. |
| 756 | bind(&delete_allocated_handles); |
| 757 | movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
| 758 | movq(prev_limit_reg, rax); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 759 | #ifdef _WIN64 |
| 760 | LoadAddress(rcx, ExternalReference::isolate_address()); |
| 761 | #else |
| 762 | LoadAddress(rdi, ExternalReference::isolate_address()); |
| 763 | #endif |
| 764 | LoadAddress(rax, |
| 765 | ExternalReference::delete_handle_scope_extensions(isolate())); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 766 | call(rax); |
| 767 | movq(rax, prev_limit_reg); |
| 768 | jmp(&leave_exit_frame); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 769 | |
| 770 | return result; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 771 | } |
| 772 | |
| 773 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 774 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 775 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 776 | // 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] | 777 | LoadAddress(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 778 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 779 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 780 | } |
| 781 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 782 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 783 | MaybeObject* MacroAssembler::TryJumpToExternalReference( |
| 784 | const ExternalReference& ext, int result_size) { |
| 785 | // 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] | 786 | LoadAddress(rbx, ext); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 787 | CEntryStub ces(result_size); |
| 788 | return TryTailCallStub(&ces); |
| 789 | } |
| 790 | |
| 791 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 792 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, |
| 793 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 794 | const CallWrapper& call_wrapper) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 795 | // Calls are not allowed in some stubs. |
| 796 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 797 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 798 | // Rely on the assertion to check that the number of provided |
| 799 | // arguments match the expected number of arguments. Fake a |
| 800 | // parameter count to avoid emitting code to do the check. |
| 801 | ParameterCount expected(0); |
| 802 | GetBuiltinEntry(rdx, id); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 803 | InvokeCode(rdx, expected, expected, flag, call_wrapper, CALL_AS_METHOD); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 804 | } |
| 805 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 806 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 807 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 808 | Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 809 | // Load the builtins object into target register. |
| 810 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 811 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 812 | movq(target, FieldOperand(target, |
| 813 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 814 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 815 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 816 | |
| 817 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 818 | ASSERT(!target.is(rdi)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 819 | // Load the JavaScript builtin function from the builtins object. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 820 | GetBuiltinFunction(rdi, id); |
| 821 | movq(target, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 822 | } |
| 823 | |
| 824 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 825 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 826 | if (x == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 827 | xorl(dst, dst); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 828 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 829 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 830 | } else if (is_int32(x)) { |
| 831 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 832 | } else { |
| 833 | movq(dst, x, RelocInfo::NONE); |
| 834 | } |
| 835 | } |
| 836 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 837 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 838 | if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 839 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 840 | } else { |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 841 | Set(kScratchRegister, x); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 842 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 843 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 844 | } |
| 845 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 846 | // ---------------------------------------------------------------------------- |
| 847 | // Smi tagging, untagging and tag detection. |
| 848 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 849 | Register MacroAssembler::GetSmiConstant(Smi* source) { |
| 850 | int value = source->value(); |
| 851 | if (value == 0) { |
| 852 | xorl(kScratchRegister, kScratchRegister); |
| 853 | return kScratchRegister; |
| 854 | } |
| 855 | if (value == 1) { |
| 856 | return kSmiConstantRegister; |
| 857 | } |
| 858 | LoadSmiConstant(kScratchRegister, source); |
| 859 | return kScratchRegister; |
| 860 | } |
| 861 | |
| 862 | void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 863 | if (emit_debug_code()) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 864 | movq(dst, |
| 865 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 866 | RelocInfo::NONE); |
| 867 | cmpq(dst, kSmiConstantRegister); |
| 868 | if (allow_stub_calls()) { |
| 869 | Assert(equal, "Uninitialized kSmiConstantRegister"); |
| 870 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 871 | Label ok; |
| 872 | j(equal, &ok, Label::kNear); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 873 | int3(); |
| 874 | bind(&ok); |
| 875 | } |
| 876 | } |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 877 | int value = source->value(); |
| 878 | if (value == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 879 | xorl(dst, dst); |
| 880 | return; |
| 881 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 882 | bool negative = value < 0; |
| 883 | unsigned int uvalue = negative ? -value : value; |
| 884 | |
| 885 | switch (uvalue) { |
| 886 | case 9: |
| 887 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_8, 0)); |
| 888 | break; |
| 889 | case 8: |
| 890 | xorl(dst, dst); |
| 891 | lea(dst, Operand(dst, kSmiConstantRegister, times_8, 0)); |
| 892 | break; |
| 893 | case 4: |
| 894 | xorl(dst, dst); |
| 895 | lea(dst, Operand(dst, kSmiConstantRegister, times_4, 0)); |
| 896 | break; |
| 897 | case 5: |
| 898 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_4, 0)); |
| 899 | break; |
| 900 | case 3: |
| 901 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_2, 0)); |
| 902 | break; |
| 903 | case 2: |
| 904 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_1, 0)); |
| 905 | break; |
| 906 | case 1: |
| 907 | movq(dst, kSmiConstantRegister); |
| 908 | break; |
| 909 | case 0: |
| 910 | UNREACHABLE(); |
| 911 | return; |
| 912 | default: |
| 913 | movq(dst, reinterpret_cast<uint64_t>(source), RelocInfo::NONE); |
| 914 | return; |
| 915 | } |
| 916 | if (negative) { |
| 917 | neg(dst); |
| 918 | } |
| 919 | } |
| 920 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 921 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 922 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 923 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 924 | if (!dst.is(src)) { |
| 925 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 926 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 927 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 928 | } |
| 929 | |
| 930 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 931 | void MacroAssembler::Integer32ToSmiField(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 932 | if (emit_debug_code()) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 933 | testb(dst, Immediate(0x01)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 934 | Label ok; |
| 935 | j(zero, &ok, Label::kNear); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 936 | if (allow_stub_calls()) { |
| 937 | Abort("Integer32ToSmiField writing to non-smi location"); |
| 938 | } else { |
| 939 | int3(); |
| 940 | } |
| 941 | bind(&ok); |
| 942 | } |
| 943 | ASSERT(kSmiShift % kBitsPerByte == 0); |
| 944 | movl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 945 | } |
| 946 | |
| 947 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 948 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 949 | Register src, |
| 950 | int constant) { |
| 951 | if (dst.is(src)) { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 952 | addl(dst, Immediate(constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 953 | } else { |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 954 | leal(dst, Operand(src, constant)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 955 | } |
| 956 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 957 | } |
| 958 | |
| 959 | |
| 960 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 961 | ASSERT_EQ(0, kSmiTag); |
| 962 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 963 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 964 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 965 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 969 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 970 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 971 | } |
| 972 | |
| 973 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 974 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 975 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 976 | if (!dst.is(src)) { |
| 977 | movq(dst, src); |
| 978 | } |
| 979 | sar(dst, Immediate(kSmiShift)); |
| 980 | } |
| 981 | |
| 982 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 983 | void MacroAssembler::SmiToInteger64(Register dst, const Operand& src) { |
| 984 | movsxlq(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 985 | } |
| 986 | |
| 987 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 988 | void MacroAssembler::SmiTest(Register src) { |
| 989 | testq(src, src); |
| 990 | } |
| 991 | |
| 992 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 993 | void MacroAssembler::SmiCompare(Register smi1, Register smi2) { |
| 994 | if (emit_debug_code()) { |
| 995 | AbortIfNotSmi(smi1); |
| 996 | AbortIfNotSmi(smi2); |
| 997 | } |
| 998 | cmpq(smi1, smi2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 999 | } |
| 1000 | |
| 1001 | |
| 1002 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1003 | if (emit_debug_code()) { |
| 1004 | AbortIfNotSmi(dst); |
| 1005 | } |
| 1006 | Cmp(dst, src); |
| 1007 | } |
| 1008 | |
| 1009 | |
| 1010 | void MacroAssembler::Cmp(Register dst, Smi* src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1011 | ASSERT(!dst.is(kScratchRegister)); |
| 1012 | if (src->value() == 0) { |
| 1013 | testq(dst, dst); |
| 1014 | } else { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1015 | Register constant_reg = GetSmiConstant(src); |
| 1016 | cmpq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1021 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1022 | if (emit_debug_code()) { |
| 1023 | AbortIfNotSmi(dst); |
| 1024 | AbortIfNotSmi(src); |
| 1025 | } |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1026 | cmpq(dst, src); |
| 1027 | } |
| 1028 | |
| 1029 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1030 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1031 | if (emit_debug_code()) { |
| 1032 | AbortIfNotSmi(dst); |
| 1033 | AbortIfNotSmi(src); |
| 1034 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1035 | cmpq(dst, src); |
| 1036 | } |
| 1037 | |
| 1038 | |
| 1039 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1040 | if (emit_debug_code()) { |
| 1041 | AbortIfNotSmi(dst); |
| 1042 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1043 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 1047 | void MacroAssembler::Cmp(const Operand& dst, Smi* src) { |
| 1048 | // The Operand cannot use the smi register. |
| 1049 | Register smi_reg = GetSmiConstant(src); |
| 1050 | ASSERT(!dst.AddressUsesRegister(smi_reg)); |
| 1051 | cmpq(dst, smi_reg); |
| 1052 | } |
| 1053 | |
| 1054 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1055 | void MacroAssembler::SmiCompareInteger32(const Operand& dst, Register src) { |
| 1056 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 1057 | } |
| 1058 | |
| 1059 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1060 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 1061 | Register src, |
| 1062 | int power) { |
| 1063 | ASSERT(power >= 0); |
| 1064 | ASSERT(power < 64); |
| 1065 | if (power == 0) { |
| 1066 | SmiToInteger64(dst, src); |
| 1067 | return; |
| 1068 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1069 | if (!dst.is(src)) { |
| 1070 | movq(dst, src); |
| 1071 | } |
| 1072 | if (power < kSmiShift) { |
| 1073 | sar(dst, Immediate(kSmiShift - power)); |
| 1074 | } else if (power > kSmiShift) { |
| 1075 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1076 | } |
| 1077 | } |
| 1078 | |
| 1079 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1080 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 1081 | Register src, |
| 1082 | int power) { |
| 1083 | ASSERT((0 <= power) && (power < 32)); |
| 1084 | if (dst.is(src)) { |
| 1085 | shr(dst, Immediate(power + kSmiShift)); |
| 1086 | } else { |
| 1087 | UNIMPLEMENTED(); // Not used. |
| 1088 | } |
| 1089 | } |
| 1090 | |
| 1091 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1092 | void MacroAssembler::SmiOrIfSmis(Register dst, Register src1, Register src2, |
| 1093 | Label* on_not_smis, |
| 1094 | Label::Distance near_jump) { |
| 1095 | if (dst.is(src1) || dst.is(src2)) { |
| 1096 | ASSERT(!src1.is(kScratchRegister)); |
| 1097 | ASSERT(!src2.is(kScratchRegister)); |
| 1098 | movq(kScratchRegister, src1); |
| 1099 | or_(kScratchRegister, src2); |
| 1100 | JumpIfNotSmi(kScratchRegister, on_not_smis, near_jump); |
| 1101 | movq(dst, kScratchRegister); |
| 1102 | } else { |
| 1103 | movq(dst, src1); |
| 1104 | or_(dst, src2); |
| 1105 | JumpIfNotSmi(dst, on_not_smis, near_jump); |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1110 | Condition MacroAssembler::CheckSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1111 | ASSERT_EQ(0, kSmiTag); |
| 1112 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1113 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1114 | } |
| 1115 | |
| 1116 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 1117 | Condition MacroAssembler::CheckSmi(const Operand& src) { |
| 1118 | ASSERT_EQ(0, kSmiTag); |
| 1119 | testb(src, Immediate(kSmiTagMask)); |
| 1120 | return zero; |
| 1121 | } |
| 1122 | |
| 1123 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1124 | Condition MacroAssembler::CheckNonNegativeSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1125 | ASSERT_EQ(0, kSmiTag); |
karlklose@chromium.org | 8f806e8 | 2011-03-07 14:06:08 +0000 | [diff] [blame] | 1126 | // 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] | 1127 | movq(kScratchRegister, src); |
| 1128 | rol(kScratchRegister, Immediate(1)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1129 | testb(kScratchRegister, Immediate(3)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1130 | return zero; |
| 1131 | } |
| 1132 | |
| 1133 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1134 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 1135 | if (first.is(second)) { |
| 1136 | return CheckSmi(first); |
| 1137 | } |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 1138 | ASSERT(kSmiTag == 0 && kHeapObjectTag == 1 && kHeapObjectTagMask == 3); |
| 1139 | leal(kScratchRegister, Operand(first, second, times_1, 0)); |
| 1140 | testb(kScratchRegister, Immediate(0x03)); |
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 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1145 | Condition MacroAssembler::CheckBothNonNegativeSmi(Register first, |
| 1146 | Register second) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1147 | if (first.is(second)) { |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1148 | return CheckNonNegativeSmi(first); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1149 | } |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 1150 | movq(kScratchRegister, first); |
| 1151 | or_(kScratchRegister, second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1152 | rol(kScratchRegister, Immediate(1)); |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 1153 | testl(kScratchRegister, Immediate(3)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1154 | return zero; |
| 1155 | } |
| 1156 | |
| 1157 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1158 | Condition MacroAssembler::CheckEitherSmi(Register first, |
| 1159 | Register second, |
| 1160 | Register scratch) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1161 | if (first.is(second)) { |
| 1162 | return CheckSmi(first); |
| 1163 | } |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 1164 | if (scratch.is(second)) { |
| 1165 | andl(scratch, first); |
| 1166 | } else { |
| 1167 | if (!scratch.is(first)) { |
| 1168 | movl(scratch, first); |
| 1169 | } |
| 1170 | andl(scratch, second); |
| 1171 | } |
| 1172 | testb(scratch, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1173 | return zero; |
| 1174 | } |
| 1175 | |
| 1176 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1177 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1178 | ASSERT(!src.is(kScratchRegister)); |
| 1179 | // If we overflow by subtracting one, it's the minimal smi value. |
| 1180 | cmpq(src, kSmiConstantRegister); |
| 1181 | return overflow; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1182 | } |
| 1183 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1184 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1185 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1186 | // A 32-bit integer value can always be converted to a smi. |
| 1187 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1191 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 1192 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 1193 | // is not set. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1194 | testl(src, src); |
| 1195 | return positive; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1196 | } |
| 1197 | |
| 1198 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 1199 | void MacroAssembler::CheckSmiToIndicator(Register dst, Register src) { |
| 1200 | if (dst.is(src)) { |
| 1201 | andl(dst, Immediate(kSmiTagMask)); |
| 1202 | } else { |
| 1203 | movl(dst, Immediate(kSmiTagMask)); |
| 1204 | andl(dst, src); |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | void MacroAssembler::CheckSmiToIndicator(Register dst, const Operand& src) { |
| 1210 | if (!(src.AddressUsesRegister(dst))) { |
| 1211 | movl(dst, Immediate(kSmiTagMask)); |
| 1212 | andl(dst, src); |
| 1213 | } else { |
| 1214 | movl(dst, src); |
| 1215 | andl(dst, Immediate(kSmiTagMask)); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1220 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, |
| 1221 | Label* on_invalid, |
| 1222 | Label::Distance near_jump) { |
| 1223 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1224 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1225 | } |
| 1226 | |
| 1227 | |
| 1228 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1229 | Label* on_invalid, |
| 1230 | Label::Distance near_jump) { |
| 1231 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1232 | j(NegateCondition(is_valid), on_invalid, near_jump); |
| 1233 | } |
| 1234 | |
| 1235 | |
| 1236 | void MacroAssembler::JumpIfSmi(Register src, |
| 1237 | Label* on_smi, |
| 1238 | Label::Distance near_jump) { |
| 1239 | Condition smi = CheckSmi(src); |
| 1240 | j(smi, on_smi, near_jump); |
| 1241 | } |
| 1242 | |
| 1243 | |
| 1244 | void MacroAssembler::JumpIfNotSmi(Register src, |
| 1245 | Label* on_not_smi, |
| 1246 | Label::Distance near_jump) { |
| 1247 | Condition smi = CheckSmi(src); |
| 1248 | j(NegateCondition(smi), on_not_smi, near_jump); |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | void MacroAssembler::JumpUnlessNonNegativeSmi( |
| 1253 | Register src, Label* on_not_smi_or_negative, |
| 1254 | Label::Distance near_jump) { |
| 1255 | Condition non_negative_smi = CheckNonNegativeSmi(src); |
| 1256 | j(NegateCondition(non_negative_smi), on_not_smi_or_negative, near_jump); |
| 1257 | } |
| 1258 | |
| 1259 | |
| 1260 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1261 | Smi* constant, |
| 1262 | Label* on_equals, |
| 1263 | Label::Distance near_jump) { |
| 1264 | SmiCompare(src, constant); |
| 1265 | j(equal, on_equals, near_jump); |
| 1266 | } |
| 1267 | |
| 1268 | |
| 1269 | void MacroAssembler::JumpIfNotBothSmi(Register src1, |
| 1270 | Register src2, |
| 1271 | Label* on_not_both_smi, |
| 1272 | Label::Distance near_jump) { |
| 1273 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1274 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1275 | } |
| 1276 | |
| 1277 | |
| 1278 | void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1, |
| 1279 | Register src2, |
| 1280 | Label* on_not_both_smi, |
| 1281 | Label::Distance near_jump) { |
| 1282 | Condition both_smi = CheckBothNonNegativeSmi(src1, src2); |
| 1283 | j(NegateCondition(both_smi), on_not_both_smi, near_jump); |
| 1284 | } |
| 1285 | |
| 1286 | |
| 1287 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 1288 | Register src, |
| 1289 | Smi* constant, |
| 1290 | Label* on_not_smi_result, |
| 1291 | Label::Distance near_jump) { |
| 1292 | // Does not assume that src is a smi. |
| 1293 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
| 1294 | ASSERT_EQ(0, kSmiTag); |
| 1295 | ASSERT(!dst.is(kScratchRegister)); |
| 1296 | ASSERT(!src.is(kScratchRegister)); |
| 1297 | |
| 1298 | JumpIfNotSmi(src, on_not_smi_result, near_jump); |
| 1299 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 1300 | LoadSmiConstant(tmp, constant); |
| 1301 | addq(tmp, src); |
| 1302 | j(overflow, on_not_smi_result, near_jump); |
| 1303 | if (dst.is(src)) { |
| 1304 | movq(dst, tmp); |
| 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1309 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 1310 | if (constant->value() == 0) { |
| 1311 | if (!dst.is(src)) { |
| 1312 | movq(dst, src); |
| 1313 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1314 | return; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1315 | } else if (dst.is(src)) { |
| 1316 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1317 | switch (constant->value()) { |
| 1318 | case 1: |
| 1319 | addq(dst, kSmiConstantRegister); |
| 1320 | return; |
| 1321 | case 2: |
| 1322 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1323 | return; |
| 1324 | case 4: |
| 1325 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1326 | return; |
| 1327 | case 8: |
| 1328 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1329 | return; |
| 1330 | default: |
| 1331 | Register constant_reg = GetSmiConstant(constant); |
| 1332 | addq(dst, constant_reg); |
| 1333 | return; |
| 1334 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1335 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1336 | switch (constant->value()) { |
| 1337 | case 1: |
| 1338 | lea(dst, Operand(src, kSmiConstantRegister, times_1, 0)); |
| 1339 | return; |
| 1340 | case 2: |
| 1341 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1342 | return; |
| 1343 | case 4: |
| 1344 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1345 | return; |
| 1346 | case 8: |
| 1347 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1348 | return; |
| 1349 | default: |
| 1350 | LoadSmiConstant(dst, constant); |
| 1351 | addq(dst, src); |
| 1352 | return; |
| 1353 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1358 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 1359 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1360 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1365 | void MacroAssembler::SmiAddConstant(Register dst, |
| 1366 | Register src, |
| 1367 | Smi* constant, |
| 1368 | Label* on_not_smi_result, |
| 1369 | Label::Distance near_jump) { |
| 1370 | if (constant->value() == 0) { |
| 1371 | if (!dst.is(src)) { |
| 1372 | movq(dst, src); |
| 1373 | } |
| 1374 | } else if (dst.is(src)) { |
| 1375 | ASSERT(!dst.is(kScratchRegister)); |
| 1376 | |
| 1377 | LoadSmiConstant(kScratchRegister, constant); |
| 1378 | addq(kScratchRegister, src); |
| 1379 | j(overflow, on_not_smi_result, near_jump); |
| 1380 | movq(dst, kScratchRegister); |
| 1381 | } else { |
| 1382 | LoadSmiConstant(dst, constant); |
| 1383 | addq(dst, src); |
| 1384 | j(overflow, on_not_smi_result, near_jump); |
| 1385 | } |
| 1386 | } |
| 1387 | |
| 1388 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1389 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 1390 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1391 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1392 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1393 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1394 | } else if (dst.is(src)) { |
| 1395 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1396 | Register constant_reg = GetSmiConstant(constant); |
| 1397 | subq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1398 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1399 | if (constant->value() == Smi::kMinValue) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1400 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1401 | // Adding and subtracting the min-value gives the same result, it only |
| 1402 | // differs on the overflow bit, which we don't check here. |
| 1403 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1404 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1405 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1406 | LoadSmiConstant(dst, Smi::FromInt(-constant->value())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1407 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1408 | } |
| 1409 | } |
| 1410 | } |
| 1411 | |
| 1412 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1413 | void MacroAssembler::SmiSubConstant(Register dst, |
| 1414 | Register src, |
| 1415 | Smi* constant, |
| 1416 | Label* on_not_smi_result, |
| 1417 | Label::Distance near_jump) { |
| 1418 | if (constant->value() == 0) { |
| 1419 | if (!dst.is(src)) { |
| 1420 | movq(dst, src); |
| 1421 | } |
| 1422 | } else if (dst.is(src)) { |
| 1423 | ASSERT(!dst.is(kScratchRegister)); |
| 1424 | if (constant->value() == Smi::kMinValue) { |
| 1425 | // Subtracting min-value from any non-negative value will overflow. |
| 1426 | // We test the non-negativeness before doing the subtraction. |
| 1427 | testq(src, src); |
| 1428 | j(not_sign, on_not_smi_result, near_jump); |
| 1429 | LoadSmiConstant(kScratchRegister, constant); |
| 1430 | subq(dst, kScratchRegister); |
| 1431 | } else { |
| 1432 | // Subtract by adding the negation. |
| 1433 | LoadSmiConstant(kScratchRegister, Smi::FromInt(-constant->value())); |
| 1434 | addq(kScratchRegister, dst); |
| 1435 | j(overflow, on_not_smi_result, near_jump); |
| 1436 | movq(dst, kScratchRegister); |
| 1437 | } |
| 1438 | } else { |
| 1439 | if (constant->value() == Smi::kMinValue) { |
| 1440 | // Subtracting min-value from any non-negative value will overflow. |
| 1441 | // We test the non-negativeness before doing the subtraction. |
| 1442 | testq(src, src); |
| 1443 | j(not_sign, on_not_smi_result, near_jump); |
| 1444 | LoadSmiConstant(dst, constant); |
| 1445 | // Adding and subtracting the min-value gives the same result, it only |
| 1446 | // differs on the overflow bit, which we don't check here. |
| 1447 | addq(dst, src); |
| 1448 | } else { |
| 1449 | // Subtract by adding the negation. |
| 1450 | LoadSmiConstant(dst, Smi::FromInt(-(constant->value()))); |
| 1451 | addq(dst, src); |
| 1452 | j(overflow, on_not_smi_result, near_jump); |
| 1453 | } |
| 1454 | } |
| 1455 | } |
| 1456 | |
| 1457 | |
| 1458 | void MacroAssembler::SmiNeg(Register dst, |
| 1459 | Register src, |
| 1460 | Label* on_smi_result, |
| 1461 | Label::Distance near_jump) { |
| 1462 | if (dst.is(src)) { |
| 1463 | ASSERT(!dst.is(kScratchRegister)); |
| 1464 | movq(kScratchRegister, src); |
| 1465 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 1466 | // Test if result is zero or Smi::kMinValue. |
| 1467 | cmpq(dst, kScratchRegister); |
| 1468 | j(not_equal, on_smi_result, near_jump); |
| 1469 | movq(src, kScratchRegister); |
| 1470 | } else { |
| 1471 | movq(dst, src); |
| 1472 | neg(dst); |
| 1473 | cmpq(dst, src); |
| 1474 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 1475 | j(not_equal, on_smi_result, near_jump); |
| 1476 | } |
| 1477 | } |
| 1478 | |
| 1479 | |
| 1480 | void MacroAssembler::SmiAdd(Register dst, |
| 1481 | Register src1, |
| 1482 | Register src2, |
| 1483 | Label* on_not_smi_result, |
| 1484 | Label::Distance near_jump) { |
| 1485 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1486 | ASSERT(!dst.is(src2)); |
| 1487 | if (dst.is(src1)) { |
| 1488 | movq(kScratchRegister, src1); |
| 1489 | addq(kScratchRegister, src2); |
| 1490 | j(overflow, on_not_smi_result, near_jump); |
| 1491 | movq(dst, kScratchRegister); |
| 1492 | } else { |
| 1493 | movq(dst, src1); |
| 1494 | addq(dst, src2); |
| 1495 | j(overflow, on_not_smi_result, near_jump); |
| 1496 | } |
| 1497 | } |
| 1498 | |
| 1499 | |
| 1500 | void MacroAssembler::SmiAdd(Register dst, |
| 1501 | Register src1, |
| 1502 | const Operand& src2, |
| 1503 | Label* on_not_smi_result, |
| 1504 | Label::Distance near_jump) { |
| 1505 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1506 | if (dst.is(src1)) { |
| 1507 | movq(kScratchRegister, src1); |
| 1508 | addq(kScratchRegister, src2); |
| 1509 | j(overflow, on_not_smi_result, near_jump); |
| 1510 | movq(dst, kScratchRegister); |
| 1511 | } else { |
| 1512 | ASSERT(!src2.AddressUsesRegister(dst)); |
| 1513 | movq(dst, src1); |
| 1514 | addq(dst, src2); |
| 1515 | j(overflow, on_not_smi_result, near_jump); |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1520 | void MacroAssembler::SmiAdd(Register dst, |
| 1521 | Register src1, |
| 1522 | Register src2) { |
| 1523 | // No overflow checking. Use only when it's known that |
| 1524 | // overflowing is impossible. |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1525 | if (!dst.is(src1)) { |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 1526 | if (emit_debug_code()) { |
| 1527 | movq(kScratchRegister, src1); |
| 1528 | addq(kScratchRegister, src2); |
| 1529 | Check(no_overflow, "Smi addition overflow"); |
| 1530 | } |
| 1531 | lea(dst, Operand(src1, src2, times_1, 0)); |
| 1532 | } else { |
| 1533 | addq(dst, src2); |
| 1534 | Assert(no_overflow, "Smi addition overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1535 | } |
| 1536 | } |
| 1537 | |
| 1538 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1539 | void MacroAssembler::SmiSub(Register dst, |
| 1540 | Register src1, |
| 1541 | Register src2, |
| 1542 | Label* on_not_smi_result, |
| 1543 | Label::Distance near_jump) { |
| 1544 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1545 | ASSERT(!dst.is(src2)); |
| 1546 | if (dst.is(src1)) { |
| 1547 | cmpq(dst, src2); |
| 1548 | j(overflow, on_not_smi_result, near_jump); |
| 1549 | subq(dst, src2); |
| 1550 | } else { |
| 1551 | movq(dst, src1); |
| 1552 | subq(dst, src2); |
| 1553 | j(overflow, on_not_smi_result, near_jump); |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1558 | void MacroAssembler::SmiSub(Register dst, Register src1, Register src2) { |
| 1559 | // No overflow checking. Use only when it's known that |
| 1560 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1561 | ASSERT(!dst.is(src2)); |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1562 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1563 | movq(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1564 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1565 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1566 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1567 | } |
| 1568 | |
| 1569 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1570 | void MacroAssembler::SmiSub(Register dst, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1571 | Register src1, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1572 | const Operand& src2, |
| 1573 | Label* on_not_smi_result, |
| 1574 | Label::Distance near_jump) { |
| 1575 | ASSERT_NOT_NULL(on_not_smi_result); |
| 1576 | if (dst.is(src1)) { |
| 1577 | movq(kScratchRegister, src2); |
| 1578 | cmpq(src1, kScratchRegister); |
| 1579 | j(overflow, on_not_smi_result, near_jump); |
| 1580 | subq(src1, kScratchRegister); |
| 1581 | } else { |
| 1582 | movq(dst, src1); |
| 1583 | subq(dst, src2); |
| 1584 | j(overflow, on_not_smi_result, near_jump); |
| 1585 | } |
| 1586 | } |
| 1587 | |
| 1588 | |
| 1589 | void MacroAssembler::SmiSub(Register dst, |
| 1590 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1591 | const Operand& src2) { |
| 1592 | // No overflow checking. Use only when it's known that |
| 1593 | // overflowing is impossible (e.g., subtracting two positive smis). |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1594 | if (!dst.is(src1)) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1595 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1596 | } |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1597 | subq(dst, src2); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1598 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1599 | } |
| 1600 | |
| 1601 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1602 | void MacroAssembler::SmiMul(Register dst, |
| 1603 | Register src1, |
| 1604 | Register src2, |
| 1605 | Label* on_not_smi_result, |
| 1606 | Label::Distance near_jump) { |
| 1607 | ASSERT(!dst.is(src2)); |
| 1608 | ASSERT(!dst.is(kScratchRegister)); |
| 1609 | ASSERT(!src1.is(kScratchRegister)); |
| 1610 | ASSERT(!src2.is(kScratchRegister)); |
| 1611 | |
| 1612 | if (dst.is(src1)) { |
| 1613 | Label failure, zero_correct_result; |
| 1614 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 1615 | SmiToInteger64(dst, src1); |
| 1616 | imul(dst, src2); |
| 1617 | j(overflow, &failure, Label::kNear); |
| 1618 | |
| 1619 | // Check for negative zero result. If product is zero, and one |
| 1620 | // argument is negative, go to slow case. |
| 1621 | Label correct_result; |
| 1622 | testq(dst, dst); |
| 1623 | j(not_zero, &correct_result, Label::kNear); |
| 1624 | |
| 1625 | movq(dst, kScratchRegister); |
| 1626 | xor_(dst, src2); |
| 1627 | // Result was positive zero. |
| 1628 | j(positive, &zero_correct_result, Label::kNear); |
| 1629 | |
| 1630 | bind(&failure); // Reused failure exit, restores src1. |
| 1631 | movq(src1, kScratchRegister); |
| 1632 | jmp(on_not_smi_result, near_jump); |
| 1633 | |
| 1634 | bind(&zero_correct_result); |
| 1635 | Set(dst, 0); |
| 1636 | |
| 1637 | bind(&correct_result); |
| 1638 | } else { |
| 1639 | SmiToInteger64(dst, src1); |
| 1640 | imul(dst, src2); |
| 1641 | j(overflow, on_not_smi_result, near_jump); |
| 1642 | // Check for negative zero result. If product is zero, and one |
| 1643 | // argument is negative, go to slow case. |
| 1644 | Label correct_result; |
| 1645 | testq(dst, dst); |
| 1646 | j(not_zero, &correct_result, Label::kNear); |
| 1647 | // One of src1 and src2 is zero, the check whether the other is |
| 1648 | // negative. |
| 1649 | movq(kScratchRegister, src1); |
| 1650 | xor_(kScratchRegister, src2); |
| 1651 | j(negative, on_not_smi_result, near_jump); |
| 1652 | bind(&correct_result); |
| 1653 | } |
| 1654 | } |
| 1655 | |
| 1656 | |
| 1657 | void MacroAssembler::SmiDiv(Register dst, |
| 1658 | Register src1, |
| 1659 | Register src2, |
| 1660 | Label* on_not_smi_result, |
| 1661 | Label::Distance near_jump) { |
| 1662 | ASSERT(!src1.is(kScratchRegister)); |
| 1663 | ASSERT(!src2.is(kScratchRegister)); |
| 1664 | ASSERT(!dst.is(kScratchRegister)); |
| 1665 | ASSERT(!src2.is(rax)); |
| 1666 | ASSERT(!src2.is(rdx)); |
| 1667 | ASSERT(!src1.is(rdx)); |
| 1668 | |
| 1669 | // Check for 0 divisor (result is +/-Infinity). |
| 1670 | testq(src2, src2); |
| 1671 | j(zero, on_not_smi_result, near_jump); |
| 1672 | |
| 1673 | if (src1.is(rax)) { |
| 1674 | movq(kScratchRegister, src1); |
| 1675 | } |
| 1676 | SmiToInteger32(rax, src1); |
| 1677 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 1678 | // overflow in idiv and raise an exception. |
| 1679 | // We combine this with negative zero test (negative zero only happens |
| 1680 | // when dividing zero by a negative number). |
| 1681 | |
| 1682 | // We overshoot a little and go to slow case if we divide min-value |
| 1683 | // by any negative value, not just -1. |
| 1684 | Label safe_div; |
| 1685 | testl(rax, Immediate(0x7fffffff)); |
| 1686 | j(not_zero, &safe_div, Label::kNear); |
| 1687 | testq(src2, src2); |
| 1688 | if (src1.is(rax)) { |
| 1689 | j(positive, &safe_div, Label::kNear); |
| 1690 | movq(src1, kScratchRegister); |
| 1691 | jmp(on_not_smi_result, near_jump); |
| 1692 | } else { |
| 1693 | j(negative, on_not_smi_result, near_jump); |
| 1694 | } |
| 1695 | bind(&safe_div); |
| 1696 | |
| 1697 | SmiToInteger32(src2, src2); |
| 1698 | // Sign extend src1 into edx:eax. |
| 1699 | cdq(); |
| 1700 | idivl(src2); |
| 1701 | Integer32ToSmi(src2, src2); |
| 1702 | // Check that the remainder is zero. |
| 1703 | testl(rdx, rdx); |
| 1704 | if (src1.is(rax)) { |
| 1705 | Label smi_result; |
| 1706 | j(zero, &smi_result, Label::kNear); |
| 1707 | movq(src1, kScratchRegister); |
| 1708 | jmp(on_not_smi_result, near_jump); |
| 1709 | bind(&smi_result); |
| 1710 | } else { |
| 1711 | j(not_zero, on_not_smi_result, near_jump); |
| 1712 | } |
| 1713 | if (!dst.is(src1) && src1.is(rax)) { |
| 1714 | movq(src1, kScratchRegister); |
| 1715 | } |
| 1716 | Integer32ToSmi(dst, rax); |
| 1717 | } |
| 1718 | |
| 1719 | |
| 1720 | void MacroAssembler::SmiMod(Register dst, |
| 1721 | Register src1, |
| 1722 | Register src2, |
| 1723 | Label* on_not_smi_result, |
| 1724 | Label::Distance near_jump) { |
| 1725 | ASSERT(!dst.is(kScratchRegister)); |
| 1726 | ASSERT(!src1.is(kScratchRegister)); |
| 1727 | ASSERT(!src2.is(kScratchRegister)); |
| 1728 | ASSERT(!src2.is(rax)); |
| 1729 | ASSERT(!src2.is(rdx)); |
| 1730 | ASSERT(!src1.is(rdx)); |
| 1731 | ASSERT(!src1.is(src2)); |
| 1732 | |
| 1733 | testq(src2, src2); |
| 1734 | j(zero, on_not_smi_result, near_jump); |
| 1735 | |
| 1736 | if (src1.is(rax)) { |
| 1737 | movq(kScratchRegister, src1); |
| 1738 | } |
| 1739 | SmiToInteger32(rax, src1); |
| 1740 | SmiToInteger32(src2, src2); |
| 1741 | |
| 1742 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1743 | Label safe_div; |
| 1744 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1745 | j(not_equal, &safe_div, Label::kNear); |
| 1746 | cmpl(src2, Immediate(-1)); |
| 1747 | j(not_equal, &safe_div, Label::kNear); |
| 1748 | // Retag inputs and go slow case. |
| 1749 | Integer32ToSmi(src2, src2); |
| 1750 | if (src1.is(rax)) { |
| 1751 | movq(src1, kScratchRegister); |
| 1752 | } |
| 1753 | jmp(on_not_smi_result, near_jump); |
| 1754 | bind(&safe_div); |
| 1755 | |
| 1756 | // Sign extend eax into edx:eax. |
| 1757 | cdq(); |
| 1758 | idivl(src2); |
| 1759 | // Restore smi tags on inputs. |
| 1760 | Integer32ToSmi(src2, src2); |
| 1761 | if (src1.is(rax)) { |
| 1762 | movq(src1, kScratchRegister); |
| 1763 | } |
| 1764 | // Check for a negative zero result. If the result is zero, and the |
| 1765 | // dividend is negative, go slow to return a floating point negative zero. |
| 1766 | Label smi_result; |
| 1767 | testl(rdx, rdx); |
| 1768 | j(not_zero, &smi_result, Label::kNear); |
| 1769 | testq(src1, src1); |
| 1770 | j(negative, on_not_smi_result, near_jump); |
| 1771 | bind(&smi_result); |
| 1772 | Integer32ToSmi(dst, rdx); |
| 1773 | } |
| 1774 | |
| 1775 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1776 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1777 | ASSERT(!dst.is(kScratchRegister)); |
| 1778 | ASSERT(!src.is(kScratchRegister)); |
| 1779 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1780 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1781 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1782 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1783 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1784 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1785 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1786 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1787 | } |
| 1788 | |
| 1789 | |
| 1790 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1791 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1792 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1793 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1794 | } |
| 1795 | and_(dst, src2); |
| 1796 | } |
| 1797 | |
| 1798 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1799 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1800 | if (constant->value() == 0) { |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 1801 | Set(dst, 0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1802 | } else if (dst.is(src)) { |
| 1803 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1804 | Register constant_reg = GetSmiConstant(constant); |
| 1805 | and_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1806 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1807 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1808 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1809 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1810 | } |
| 1811 | |
| 1812 | |
| 1813 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1814 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1815 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1816 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1817 | } |
| 1818 | or_(dst, src2); |
| 1819 | } |
| 1820 | |
| 1821 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1822 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1823 | if (dst.is(src)) { |
| 1824 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1825 | Register constant_reg = GetSmiConstant(constant); |
| 1826 | or_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1827 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1828 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1829 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1830 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1831 | } |
| 1832 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1833 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1834 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1835 | if (!dst.is(src1)) { |
karlklose@chromium.org | 44bc708 | 2011-04-11 12:33:05 +0000 | [diff] [blame] | 1836 | ASSERT(!src1.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1837 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1838 | } |
| 1839 | xor_(dst, src2); |
| 1840 | } |
| 1841 | |
| 1842 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1843 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1844 | if (dst.is(src)) { |
| 1845 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1846 | Register constant_reg = GetSmiConstant(constant); |
| 1847 | xor_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1848 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1849 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1850 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1851 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1852 | } |
| 1853 | |
| 1854 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1855 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1856 | Register src, |
| 1857 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1858 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1859 | if (shift_value > 0) { |
| 1860 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1861 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1862 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1863 | } else { |
| 1864 | UNIMPLEMENTED(); // Not used. |
| 1865 | } |
| 1866 | } |
| 1867 | } |
| 1868 | |
| 1869 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1870 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1871 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1872 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1873 | if (!dst.is(src)) { |
| 1874 | movq(dst, src); |
| 1875 | } |
| 1876 | if (shift_value > 0) { |
| 1877 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1878 | } |
| 1879 | } |
| 1880 | |
| 1881 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1882 | void MacroAssembler::SmiShiftLogicalRightConstant( |
| 1883 | Register dst, Register src, int shift_value, |
| 1884 | Label* on_not_smi_result, Label::Distance near_jump) { |
| 1885 | // Logic right shift interprets its result as an *unsigned* number. |
| 1886 | if (dst.is(src)) { |
| 1887 | UNIMPLEMENTED(); // Not used. |
| 1888 | } else { |
| 1889 | movq(dst, src); |
| 1890 | if (shift_value == 0) { |
| 1891 | testq(dst, dst); |
| 1892 | j(negative, on_not_smi_result, near_jump); |
| 1893 | } |
| 1894 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1895 | shl(dst, Immediate(kSmiShift)); |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1900 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 1901 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1902 | Register src2) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1903 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1904 | // Untag shift amount. |
| 1905 | if (!dst.is(src1)) { |
| 1906 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1907 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1908 | SmiToInteger32(rcx, src2); |
| 1909 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 1910 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1911 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1912 | } |
| 1913 | |
| 1914 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1915 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1916 | Register src1, |
| 1917 | Register src2, |
| 1918 | Label* on_not_smi_result, |
| 1919 | Label::Distance near_jump) { |
| 1920 | ASSERT(!dst.is(kScratchRegister)); |
| 1921 | ASSERT(!src1.is(kScratchRegister)); |
| 1922 | ASSERT(!src2.is(kScratchRegister)); |
| 1923 | ASSERT(!dst.is(rcx)); |
| 1924 | // dst and src1 can be the same, because the one case that bails out |
| 1925 | // is a shift by 0, which leaves dst, and therefore src1, unchanged. |
| 1926 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1927 | movq(kScratchRegister, rcx); |
| 1928 | } |
| 1929 | if (!dst.is(src1)) { |
| 1930 | movq(dst, src1); |
| 1931 | } |
| 1932 | SmiToInteger32(rcx, src2); |
| 1933 | orl(rcx, Immediate(kSmiShift)); |
| 1934 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
| 1935 | shl(dst, Immediate(kSmiShift)); |
| 1936 | testq(dst, dst); |
| 1937 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1938 | Label positive_result; |
| 1939 | j(positive, &positive_result, Label::kNear); |
| 1940 | if (src1.is(rcx)) { |
| 1941 | movq(src1, kScratchRegister); |
| 1942 | } else { |
| 1943 | movq(src2, kScratchRegister); |
| 1944 | } |
| 1945 | jmp(on_not_smi_result, near_jump); |
| 1946 | bind(&positive_result); |
| 1947 | } else { |
| 1948 | // src2 was zero and src1 negative. |
| 1949 | j(negative, on_not_smi_result, near_jump); |
| 1950 | } |
| 1951 | } |
| 1952 | |
| 1953 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1954 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1955 | Register src1, |
| 1956 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1957 | ASSERT(!dst.is(kScratchRegister)); |
| 1958 | ASSERT(!src1.is(kScratchRegister)); |
| 1959 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1960 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1961 | if (src1.is(rcx)) { |
| 1962 | movq(kScratchRegister, src1); |
| 1963 | } else if (src2.is(rcx)) { |
| 1964 | movq(kScratchRegister, src2); |
| 1965 | } |
| 1966 | if (!dst.is(src1)) { |
| 1967 | movq(dst, src1); |
| 1968 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1969 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1970 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1971 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1972 | shl(dst, Immediate(kSmiShift)); |
| 1973 | if (src1.is(rcx)) { |
| 1974 | movq(src1, kScratchRegister); |
| 1975 | } else if (src2.is(rcx)) { |
| 1976 | movq(src2, kScratchRegister); |
| 1977 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1978 | } |
| 1979 | |
| 1980 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1981 | void MacroAssembler::SelectNonSmi(Register dst, |
| 1982 | Register src1, |
| 1983 | Register src2, |
| 1984 | Label* on_not_smis, |
| 1985 | Label::Distance near_jump) { |
| 1986 | ASSERT(!dst.is(kScratchRegister)); |
| 1987 | ASSERT(!src1.is(kScratchRegister)); |
| 1988 | ASSERT(!src2.is(kScratchRegister)); |
| 1989 | ASSERT(!dst.is(src1)); |
| 1990 | ASSERT(!dst.is(src2)); |
| 1991 | // Both operands must not be smis. |
| 1992 | #ifdef DEBUG |
| 1993 | if (allow_stub_calls()) { // Check contains a stub call. |
| 1994 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 1995 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 1996 | } |
| 1997 | #endif |
| 1998 | ASSERT_EQ(0, kSmiTag); |
| 1999 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 2000 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
| 2001 | and_(kScratchRegister, src1); |
| 2002 | testl(kScratchRegister, src2); |
| 2003 | // If non-zero then both are smis. |
| 2004 | j(not_zero, on_not_smis, near_jump); |
| 2005 | |
| 2006 | // Exactly one operand is a smi. |
| 2007 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 2008 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 2009 | subq(kScratchRegister, Immediate(1)); |
| 2010 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 2011 | movq(dst, src1); |
| 2012 | xor_(dst, src2); |
| 2013 | and_(dst, kScratchRegister); |
| 2014 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 2015 | xor_(dst, src1); |
| 2016 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
| 2017 | } |
| 2018 | |
| 2019 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2020 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 2021 | Register src, |
| 2022 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2023 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2024 | // There is a possible optimization if shift is in the range 60-63, but that |
| 2025 | // will (and must) never happen. |
| 2026 | if (!dst.is(src)) { |
| 2027 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2028 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2029 | if (shift < kSmiShift) { |
| 2030 | sar(dst, Immediate(kSmiShift - shift)); |
| 2031 | } else { |
| 2032 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2033 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2034 | return SmiIndex(dst, times_1); |
| 2035 | } |
| 2036 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2037 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 2038 | Register src, |
| 2039 | int shift) { |
| 2040 | // Register src holds a positive smi. |
| 2041 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2042 | if (!dst.is(src)) { |
| 2043 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2044 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2045 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2046 | if (shift < kSmiShift) { |
| 2047 | sar(dst, Immediate(kSmiShift - shift)); |
| 2048 | } else { |
| 2049 | shl(dst, Immediate(shift - kSmiShift)); |
| 2050 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2051 | return SmiIndex(dst, times_1); |
| 2052 | } |
| 2053 | |
| 2054 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2055 | void MacroAssembler::AddSmiField(Register dst, const Operand& src) { |
| 2056 | ASSERT_EQ(0, kSmiShift % kBitsPerByte); |
| 2057 | addl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 2058 | } |
| 2059 | |
| 2060 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2061 | void MacroAssembler::JumpIfNotString(Register object, |
| 2062 | Register object_map, |
| 2063 | Label* not_string, |
| 2064 | Label::Distance near_jump) { |
| 2065 | Condition is_smi = CheckSmi(object); |
| 2066 | j(is_smi, not_string, near_jump); |
| 2067 | CmpObjectType(object, FIRST_NONSTRING_TYPE, object_map); |
| 2068 | j(above_equal, not_string, near_jump); |
| 2069 | } |
| 2070 | |
| 2071 | |
| 2072 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings( |
| 2073 | Register first_object, |
| 2074 | Register second_object, |
| 2075 | Register scratch1, |
| 2076 | Register scratch2, |
| 2077 | Label* on_fail, |
| 2078 | Label::Distance near_jump) { |
| 2079 | // Check that both objects are not smis. |
| 2080 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 2081 | j(either_smi, on_fail, near_jump); |
| 2082 | |
| 2083 | // Load instance type for both strings. |
| 2084 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 2085 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 2086 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 2087 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 2088 | |
| 2089 | // Check that both are flat ascii strings. |
| 2090 | ASSERT(kNotStringTag != 0); |
| 2091 | const int kFlatAsciiStringMask = |
| 2092 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2093 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2094 | |
| 2095 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2096 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2097 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2098 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2099 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2100 | cmpl(scratch1, |
| 2101 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2102 | j(not_equal, on_fail, near_jump); |
| 2103 | } |
| 2104 | |
| 2105 | |
| 2106 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 2107 | Register instance_type, |
| 2108 | Register scratch, |
| 2109 | Label* failure, |
| 2110 | Label::Distance near_jump) { |
| 2111 | if (!scratch.is(instance_type)) { |
| 2112 | movl(scratch, instance_type); |
| 2113 | } |
| 2114 | |
| 2115 | const int kFlatAsciiStringMask = |
| 2116 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2117 | |
| 2118 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 2119 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 2120 | j(not_equal, failure, near_jump); |
| 2121 | } |
| 2122 | |
| 2123 | |
| 2124 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 2125 | Register first_object_instance_type, |
| 2126 | Register second_object_instance_type, |
| 2127 | Register scratch1, |
| 2128 | Register scratch2, |
| 2129 | Label* on_fail, |
| 2130 | Label::Distance near_jump) { |
| 2131 | // Load instance type for both strings. |
| 2132 | movq(scratch1, first_object_instance_type); |
| 2133 | movq(scratch2, second_object_instance_type); |
| 2134 | |
| 2135 | // Check that both are flat ascii strings. |
| 2136 | ASSERT(kNotStringTag != 0); |
| 2137 | const int kFlatAsciiStringMask = |
| 2138 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 2139 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 2140 | |
| 2141 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 2142 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 2143 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 2144 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 2145 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 2146 | cmpl(scratch1, |
| 2147 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 2148 | j(not_equal, on_fail, near_jump); |
| 2149 | } |
| 2150 | |
| 2151 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 2152 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 2153 | void MacroAssembler::Move(Register dst, Register src) { |
| 2154 | if (!dst.is(src)) { |
| 2155 | movq(dst, src); |
| 2156 | } |
| 2157 | } |
| 2158 | |
| 2159 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2160 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2161 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2162 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2163 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2164 | } else { |
| 2165 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 2166 | } |
| 2167 | } |
| 2168 | |
| 2169 | |
| 2170 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2171 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2172 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2173 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2174 | } else { |
| 2175 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2176 | movq(dst, kScratchRegister); |
| 2177 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2178 | } |
| 2179 | |
| 2180 | |
| 2181 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2182 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2183 | Cmp(dst, Smi::cast(*source)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2184 | } else { |
| 2185 | Move(kScratchRegister, source); |
| 2186 | cmpq(dst, kScratchRegister); |
| 2187 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2188 | } |
| 2189 | |
| 2190 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2191 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2192 | if (source->IsSmi()) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2193 | Cmp(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2194 | } else { |
| 2195 | ASSERT(source->IsHeapObject()); |
| 2196 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2197 | cmpq(dst, kScratchRegister); |
| 2198 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2199 | } |
| 2200 | |
| 2201 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2202 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2203 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2204 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 2205 | } else { |
| 2206 | ASSERT(source->IsHeapObject()); |
| 2207 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 2208 | push(kScratchRegister); |
| 2209 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2213 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2214 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 2215 | if (is_int32(smi)) { |
| 2216 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2217 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 2218 | Register constant = GetSmiConstant(source); |
| 2219 | push(constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2220 | } |
| 2221 | } |
| 2222 | |
| 2223 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2224 | void MacroAssembler::Drop(int stack_elements) { |
| 2225 | if (stack_elements > 0) { |
| 2226 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 2227 | } |
| 2228 | } |
| 2229 | |
| 2230 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2231 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 2232 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 2233 | } |
| 2234 | |
| 2235 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2236 | void MacroAssembler::Jump(ExternalReference ext) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2237 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2238 | jmp(kScratchRegister); |
| 2239 | } |
| 2240 | |
| 2241 | |
| 2242 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 2243 | movq(kScratchRegister, destination, rmode); |
| 2244 | jmp(kScratchRegister); |
| 2245 | } |
| 2246 | |
| 2247 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2248 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2249 | // TODO(X64): Inline this |
| 2250 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2251 | } |
| 2252 | |
| 2253 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2254 | int MacroAssembler::CallSize(ExternalReference ext) { |
| 2255 | // Opcode for call kScratchRegister is: Rex.B FF D4 (three bytes). |
| 2256 | const int kCallInstructionSize = 3; |
| 2257 | return LoadAddressSize(ext) + kCallInstructionSize; |
| 2258 | } |
| 2259 | |
| 2260 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2261 | void MacroAssembler::Call(ExternalReference ext) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2262 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2263 | int end_position = pc_offset() + CallSize(ext); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2264 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2265 | LoadAddress(kScratchRegister, ext); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2266 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2267 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2268 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2269 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2270 | } |
| 2271 | |
| 2272 | |
| 2273 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2274 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2275 | int end_position = pc_offset() + CallSize(destination, rmode); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2276 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2277 | movq(kScratchRegister, destination, rmode); |
| 2278 | call(kScratchRegister); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2279 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2280 | CHECK_EQ(pc_offset(), end_position); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2281 | #endif |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2282 | } |
| 2283 | |
| 2284 | |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2285 | void MacroAssembler::Call(Handle<Code> code_object, |
| 2286 | RelocInfo::Mode rmode, |
| 2287 | unsigned ast_id) { |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2288 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2289 | int end_position = pc_offset() + CallSize(code_object); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2290 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2291 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 2292 | call(code_object, rmode, ast_id); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2293 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2294 | CHECK_EQ(end_position, pc_offset()); |
ricow@chromium.org | eb96f4f | 2011-03-09 13:41:48 +0000 | [diff] [blame] | 2295 | #endif |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2296 | } |
| 2297 | |
| 2298 | |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2299 | void MacroAssembler::Pushad() { |
| 2300 | push(rax); |
| 2301 | push(rcx); |
| 2302 | push(rdx); |
| 2303 | push(rbx); |
| 2304 | // Not pushing rsp or rbp. |
| 2305 | push(rsi); |
| 2306 | push(rdi); |
| 2307 | push(r8); |
| 2308 | push(r9); |
| 2309 | // r10 is kScratchRegister. |
| 2310 | push(r11); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2311 | // r12 is kSmiConstantRegister. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2312 | // r13 is kRootRegister. |
| 2313 | push(r14); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2314 | push(r15); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2315 | STATIC_ASSERT(11 == kNumSafepointSavedRegisters); |
| 2316 | // Use lea for symmetry with Popad. |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2317 | int sp_delta = |
| 2318 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2319 | lea(rsp, Operand(rsp, -sp_delta)); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2320 | } |
| 2321 | |
| 2322 | |
| 2323 | void MacroAssembler::Popad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2324 | // 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] | 2325 | int sp_delta = |
| 2326 | (kNumSafepointRegisters - kNumSafepointSavedRegisters) * kPointerSize; |
| 2327 | lea(rsp, Operand(rsp, sp_delta)); |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2328 | pop(r15); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2329 | pop(r14); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 2330 | pop(r11); |
| 2331 | pop(r9); |
| 2332 | pop(r8); |
| 2333 | pop(rdi); |
| 2334 | pop(rsi); |
| 2335 | pop(rbx); |
| 2336 | pop(rdx); |
| 2337 | pop(rcx); |
| 2338 | pop(rax); |
| 2339 | } |
| 2340 | |
| 2341 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2342 | void MacroAssembler::Dropad() { |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2343 | addq(rsp, Immediate(kNumSafepointRegisters * kPointerSize)); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2344 | } |
| 2345 | |
| 2346 | |
| 2347 | // Order general registers are pushed by Pushad: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2348 | // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15. |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2349 | int MacroAssembler::kSafepointPushRegisterIndices[Register::kNumRegisters] = { |
| 2350 | 0, |
| 2351 | 1, |
| 2352 | 2, |
| 2353 | 3, |
| 2354 | -1, |
| 2355 | -1, |
| 2356 | 4, |
| 2357 | 5, |
| 2358 | 6, |
| 2359 | 7, |
| 2360 | -1, |
| 2361 | 8, |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2362 | -1, |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 2363 | -1, |
| 2364 | 9, |
| 2365 | 10 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 2366 | }; |
| 2367 | |
| 2368 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2369 | void MacroAssembler::StoreToSafepointRegisterSlot(Register dst, Register src) { |
| 2370 | movq(SafepointRegisterSlot(dst), src); |
| 2371 | } |
| 2372 | |
| 2373 | |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 2374 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 2375 | movq(dst, SafepointRegisterSlot(src)); |
| 2376 | } |
| 2377 | |
| 2378 | |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2379 | Operand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 2380 | return Operand(rsp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 2381 | } |
| 2382 | |
| 2383 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2384 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 2385 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2386 | // Adjust this code if not the case. |
| 2387 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 2388 | |
| 2389 | // The pc (return address) is already on TOS. This code pushes state, |
| 2390 | // frame pointer and current handler. Check that they are expected |
| 2391 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2392 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 2393 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2394 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2395 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 2396 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2397 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 2398 | |
| 2399 | if (try_location == IN_JAVASCRIPT) { |
| 2400 | if (type == TRY_CATCH_HANDLER) { |
| 2401 | push(Immediate(StackHandler::TRY_CATCH)); |
| 2402 | } else { |
| 2403 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 2404 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2405 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2406 | } else { |
| 2407 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2408 | // The frame pointer does not point to a JS frame so we save NULL |
| 2409 | // for rbp. We expect the code throwing an exception to check rbp |
| 2410 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2411 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2412 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2413 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2414 | // Save the current handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2415 | Operand handler_operand = |
| 2416 | ExternalOperand(ExternalReference(Isolate::k_handler_address, isolate())); |
| 2417 | push(handler_operand); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2418 | // Link this handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2419 | movq(handler_operand, rsp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 2420 | } |
| 2421 | |
| 2422 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2423 | void MacroAssembler::PopTryHandler() { |
| 2424 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 2425 | // Unlink this handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2426 | Operand handler_operand = |
| 2427 | ExternalOperand(ExternalReference(Isolate::k_handler_address, isolate())); |
| 2428 | pop(handler_operand); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2429 | // Remove the remaining fields. |
| 2430 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 2431 | } |
| 2432 | |
| 2433 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2434 | void MacroAssembler::Throw(Register value) { |
| 2435 | // Check that stack should contain next handler, frame pointer, state and |
| 2436 | // return address in that order. |
| 2437 | STATIC_ASSERT(StackHandlerConstants::kFPOffset + kPointerSize == |
| 2438 | StackHandlerConstants::kStateOffset); |
| 2439 | STATIC_ASSERT(StackHandlerConstants::kStateOffset + kPointerSize == |
| 2440 | StackHandlerConstants::kPCOffset); |
| 2441 | // Keep thrown value in rax. |
| 2442 | if (!value.is(rax)) { |
| 2443 | movq(rax, value); |
| 2444 | } |
| 2445 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2446 | ExternalReference handler_address(Isolate::k_handler_address, isolate()); |
| 2447 | Operand handler_operand = ExternalOperand(handler_address); |
| 2448 | movq(rsp, handler_operand); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2449 | // get next in chain |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2450 | pop(handler_operand); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2451 | pop(rbp); // pop frame pointer |
| 2452 | pop(rdx); // remove state |
| 2453 | |
| 2454 | // Before returning we restore the context from the frame pointer if not NULL. |
| 2455 | // The frame pointer is NULL in the exception handler of a JS entry frame. |
| 2456 | Set(rsi, 0); // Tentatively set context pointer to NULL |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2457 | Label skip; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2458 | cmpq(rbp, Immediate(0)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2459 | j(equal, &skip, Label::kNear); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2460 | movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 2461 | bind(&skip); |
| 2462 | ret(0); |
| 2463 | } |
| 2464 | |
| 2465 | |
| 2466 | void MacroAssembler::ThrowUncatchable(UncatchableExceptionType type, |
| 2467 | Register value) { |
| 2468 | // Keep thrown value in rax. |
| 2469 | if (!value.is(rax)) { |
| 2470 | movq(rax, value); |
| 2471 | } |
| 2472 | // Fetch top stack handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2473 | ExternalReference handler_address(Isolate::k_handler_address, isolate()); |
| 2474 | Load(rsp, handler_address); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2475 | |
| 2476 | // Unwind the handlers until the ENTRY handler is found. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2477 | Label loop, done; |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2478 | bind(&loop); |
| 2479 | // Load the type of the current stack handler. |
| 2480 | const int kStateOffset = StackHandlerConstants::kStateOffset; |
| 2481 | cmpq(Operand(rsp, kStateOffset), Immediate(StackHandler::ENTRY)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2482 | j(equal, &done, Label::kNear); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2483 | // Fetch the next handler in the list. |
| 2484 | const int kNextOffset = StackHandlerConstants::kNextOffset; |
| 2485 | movq(rsp, Operand(rsp, kNextOffset)); |
| 2486 | jmp(&loop); |
| 2487 | bind(&done); |
| 2488 | |
| 2489 | // Set the top handler address to next handler past the current ENTRY handler. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2490 | Operand handler_operand = ExternalOperand(handler_address); |
| 2491 | pop(handler_operand); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2492 | |
| 2493 | if (type == OUT_OF_MEMORY) { |
| 2494 | // Set external caught exception to false. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2495 | ExternalReference external_caught( |
| 2496 | Isolate::k_external_caught_exception_address, isolate()); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2497 | Set(rax, static_cast<int64_t>(false)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2498 | Store(external_caught, rax); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2499 | |
| 2500 | // Set pending exception and rax to out of memory exception. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2501 | ExternalReference pending_exception(Isolate::k_pending_exception_address, |
| 2502 | isolate()); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2503 | movq(rax, Failure::OutOfMemoryException(), RelocInfo::NONE); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2504 | Store(pending_exception, rax); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2505 | } |
| 2506 | |
| 2507 | // Clear the context pointer. |
| 2508 | Set(rsi, 0); |
| 2509 | |
| 2510 | // Restore registers from handler. |
| 2511 | STATIC_ASSERT(StackHandlerConstants::kNextOffset + kPointerSize == |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2512 | StackHandlerConstants::kFPOffset); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2513 | pop(rbp); // FP |
| 2514 | STATIC_ASSERT(StackHandlerConstants::kFPOffset + kPointerSize == |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2515 | StackHandlerConstants::kStateOffset); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2516 | pop(rdx); // State |
| 2517 | |
| 2518 | STATIC_ASSERT(StackHandlerConstants::kStateOffset + kPointerSize == |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2519 | StackHandlerConstants::kPCOffset); |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2520 | ret(0); |
| 2521 | } |
| 2522 | |
| 2523 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2524 | void MacroAssembler::Ret() { |
| 2525 | ret(0); |
| 2526 | } |
| 2527 | |
| 2528 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 2529 | void MacroAssembler::Ret(int bytes_dropped, Register scratch) { |
| 2530 | if (is_uint16(bytes_dropped)) { |
| 2531 | ret(bytes_dropped); |
| 2532 | } else { |
| 2533 | pop(scratch); |
| 2534 | addq(rsp, Immediate(bytes_dropped)); |
| 2535 | push(scratch); |
| 2536 | ret(0); |
| 2537 | } |
| 2538 | } |
| 2539 | |
| 2540 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2541 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2542 | fucomip(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 2543 | fstp(0); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2544 | } |
| 2545 | |
| 2546 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2547 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 2548 | InstanceType type, |
| 2549 | Register map) { |
| 2550 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2551 | CmpInstanceType(map, type); |
| 2552 | } |
| 2553 | |
| 2554 | |
| 2555 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 2556 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 2557 | Immediate(static_cast<int8_t>(type))); |
| 2558 | } |
| 2559 | |
| 2560 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2561 | void MacroAssembler::CheckFastElements(Register map, |
| 2562 | Label* fail, |
| 2563 | Label::Distance distance) { |
| 2564 | STATIC_ASSERT(JSObject::FAST_ELEMENTS == 0); |
| 2565 | cmpb(FieldOperand(map, Map::kBitField2Offset), |
| 2566 | Immediate(Map::kMaximumBitField2FastElementValue)); |
| 2567 | j(above, fail, distance); |
| 2568 | } |
| 2569 | |
| 2570 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2571 | void MacroAssembler::CheckMap(Register obj, |
| 2572 | Handle<Map> map, |
| 2573 | Label* fail, |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2574 | SmiCheckType smi_check_type) { |
| 2575 | if (smi_check_type == DO_SMI_CHECK) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2576 | JumpIfSmi(obj, fail); |
| 2577 | } |
| 2578 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2579 | j(not_equal, fail); |
| 2580 | } |
| 2581 | |
| 2582 | |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 2583 | void MacroAssembler::ClampUint8(Register reg) { |
| 2584 | Label done; |
| 2585 | testl(reg, Immediate(0xFFFFFF00)); |
| 2586 | j(zero, &done, Label::kNear); |
| 2587 | setcc(negative, reg); // 1 if negative, 0 if positive. |
| 2588 | decb(reg); // 0 if negative, 255 if positive. |
| 2589 | bind(&done); |
| 2590 | } |
| 2591 | |
| 2592 | |
| 2593 | void MacroAssembler::ClampDoubleToUint8(XMMRegister input_reg, |
| 2594 | XMMRegister temp_xmm_reg, |
| 2595 | Register result_reg, |
| 2596 | Register temp_reg) { |
| 2597 | Label done; |
| 2598 | Set(result_reg, 0); |
| 2599 | xorps(temp_xmm_reg, temp_xmm_reg); |
| 2600 | ucomisd(input_reg, temp_xmm_reg); |
| 2601 | j(below, &done, Label::kNear); |
| 2602 | uint64_t one_half = BitCast<uint64_t, double>(0.5); |
| 2603 | Set(temp_reg, one_half); |
| 2604 | movq(temp_xmm_reg, temp_reg); |
| 2605 | addsd(temp_xmm_reg, input_reg); |
| 2606 | cvttsd2si(result_reg, temp_xmm_reg); |
| 2607 | testl(result_reg, Immediate(0xFFFFFF00)); |
| 2608 | j(zero, &done, Label::kNear); |
| 2609 | Set(result_reg, 255); |
| 2610 | bind(&done); |
| 2611 | } |
| 2612 | |
| 2613 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2614 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
| 2615 | Register descriptors) { |
| 2616 | movq(descriptors, FieldOperand(map, |
| 2617 | Map::kInstanceDescriptorsOrBitField3Offset)); |
| 2618 | Label not_smi; |
| 2619 | JumpIfNotSmi(descriptors, ¬_smi, Label::kNear); |
| 2620 | Move(descriptors, isolate()->factory()->empty_descriptor_array()); |
| 2621 | bind(¬_smi); |
| 2622 | } |
| 2623 | |
| 2624 | |
ager@chromium.org | ea91cc5 | 2011-05-23 06:06:11 +0000 | [diff] [blame] | 2625 | void MacroAssembler::DispatchMap(Register obj, |
| 2626 | Handle<Map> map, |
| 2627 | Handle<Code> success, |
| 2628 | SmiCheckType smi_check_type) { |
| 2629 | Label fail; |
| 2630 | if (smi_check_type == DO_SMI_CHECK) { |
| 2631 | JumpIfSmi(obj, &fail); |
| 2632 | } |
| 2633 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 2634 | j(equal, success, RelocInfo::CODE_TARGET); |
| 2635 | |
| 2636 | bind(&fail); |
| 2637 | } |
| 2638 | |
| 2639 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2640 | void MacroAssembler::AbortIfNotNumber(Register object) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2641 | Label ok; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2642 | Condition is_smi = CheckSmi(object); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2643 | j(is_smi, &ok, Label::kNear); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2644 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2645 | isolate()->factory()->heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2646 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2647 | bind(&ok); |
| 2648 | } |
| 2649 | |
| 2650 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2651 | void MacroAssembler::AbortIfSmi(Register object) { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2652 | Condition is_smi = CheckSmi(object); |
| 2653 | Assert(NegateCondition(is_smi), "Operand is a smi"); |
| 2654 | } |
| 2655 | |
| 2656 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2657 | void MacroAssembler::AbortIfNotSmi(Register object) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2658 | Condition is_smi = CheckSmi(object); |
| 2659 | Assert(is_smi, "Operand is not a smi"); |
| 2660 | } |
| 2661 | |
| 2662 | |
| 2663 | void MacroAssembler::AbortIfNotSmi(const Operand& object) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2664 | Condition is_smi = CheckSmi(object); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2665 | Assert(is_smi, "Operand is not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2666 | } |
| 2667 | |
| 2668 | |
kmillikin@chromium.org | 49edbdf | 2011-02-16 12:32:18 +0000 | [diff] [blame] | 2669 | void MacroAssembler::AbortIfNotString(Register object) { |
| 2670 | testb(object, Immediate(kSmiTagMask)); |
| 2671 | Assert(not_equal, "Operand is not a string"); |
| 2672 | push(object); |
| 2673 | movq(object, FieldOperand(object, HeapObject::kMapOffset)); |
| 2674 | CmpInstanceType(object, FIRST_NONSTRING_TYPE); |
| 2675 | pop(object); |
| 2676 | Assert(below, "Operand is not a string"); |
| 2677 | } |
| 2678 | |
| 2679 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 2680 | void MacroAssembler::AbortIfNotRootValue(Register src, |
| 2681 | Heap::RootListIndex root_value_index, |
| 2682 | const char* message) { |
| 2683 | ASSERT(!src.is(kScratchRegister)); |
| 2684 | LoadRoot(kScratchRegister, root_value_index); |
| 2685 | cmpq(src, kScratchRegister); |
| 2686 | Check(equal, message); |
| 2687 | } |
| 2688 | |
| 2689 | |
| 2690 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2691 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 2692 | Register map, |
| 2693 | Register instance_type) { |
| 2694 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2695 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 2696 | ASSERT(kNotStringTag != 0); |
| 2697 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 2698 | return zero; |
| 2699 | } |
| 2700 | |
| 2701 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2702 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 2703 | Register result, |
| 2704 | Label* miss) { |
| 2705 | // Check that the receiver isn't a smi. |
| 2706 | testl(function, Immediate(kSmiTagMask)); |
| 2707 | j(zero, miss); |
| 2708 | |
| 2709 | // Check that the function really is a function. |
| 2710 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 2711 | j(not_equal, miss); |
| 2712 | |
| 2713 | // Make sure that the function has an instance prototype. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2714 | Label non_instance; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2715 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 2716 | Immediate(1 << Map::kHasNonInstancePrototype)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2717 | j(not_zero, &non_instance, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2718 | |
| 2719 | // Get the prototype or initial map from the function. |
| 2720 | movq(result, |
| 2721 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2722 | |
| 2723 | // If the prototype or initial map is the hole, don't return it and |
| 2724 | // simply miss the cache instead. This will allow us to allocate a |
| 2725 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2726 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2727 | j(equal, miss); |
| 2728 | |
| 2729 | // 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] | 2730 | Label done; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2731 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2732 | j(not_equal, &done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2733 | |
| 2734 | // Get the prototype from the initial map. |
| 2735 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2736 | jmp(&done, Label::kNear); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2737 | |
| 2738 | // Non-instance prototype: Fetch prototype from constructor field |
| 2739 | // in initial map. |
| 2740 | bind(&non_instance); |
| 2741 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 2742 | |
| 2743 | // All done. |
| 2744 | bind(&done); |
| 2745 | } |
| 2746 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2747 | |
| 2748 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 2749 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2750 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 2751 | movl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2752 | } |
| 2753 | } |
| 2754 | |
| 2755 | |
| 2756 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 2757 | ASSERT(value > 0); |
| 2758 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2759 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2760 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2761 | incl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2762 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2763 | addl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2764 | } |
| 2765 | } |
| 2766 | } |
| 2767 | |
| 2768 | |
| 2769 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 2770 | ASSERT(value > 0); |
| 2771 | if (FLAG_native_code_counters && counter->Enabled()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2772 | Operand counter_operand = ExternalOperand(ExternalReference(counter)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2773 | if (value == 1) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2774 | decl(counter_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2775 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2776 | subl(counter_operand, Immediate(value)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2777 | } |
| 2778 | } |
| 2779 | } |
| 2780 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 2781 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2782 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2783 | void MacroAssembler::DebugBreak() { |
| 2784 | ASSERT(allow_stub_calls()); |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 2785 | Set(rax, 0); // No arguments. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 2786 | LoadAddress(rbx, ExternalReference(Runtime::kDebugBreak, isolate())); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2787 | CEntryStub ces(1); |
| 2788 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2789 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2790 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2791 | |
| 2792 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2793 | void MacroAssembler::SetCallKind(Register dst, CallKind call_kind) { |
| 2794 | // This macro takes the dst register to make the code more readable |
| 2795 | // at the call sites. However, the dst register has to be rcx to |
| 2796 | // follow the calling convention which requires the call type to be |
| 2797 | // in rcx. |
| 2798 | ASSERT(dst.is(rcx)); |
| 2799 | if (call_kind == CALL_AS_FUNCTION) { |
| 2800 | LoadSmiConstant(dst, Smi::FromInt(1)); |
| 2801 | } else { |
| 2802 | LoadSmiConstant(dst, Smi::FromInt(0)); |
| 2803 | } |
| 2804 | } |
| 2805 | |
| 2806 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2807 | void MacroAssembler::InvokeCode(Register code, |
| 2808 | const ParameterCount& expected, |
| 2809 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2810 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2811 | const CallWrapper& call_wrapper, |
| 2812 | CallKind call_kind) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2813 | Label done; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2814 | InvokePrologue(expected, |
| 2815 | actual, |
| 2816 | Handle<Code>::null(), |
| 2817 | code, |
| 2818 | &done, |
| 2819 | flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2820 | Label::kNear, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2821 | call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2822 | call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2823 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 2824 | call_wrapper.BeforeCall(CallSize(code)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2825 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2826 | call(code); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 2827 | call_wrapper.AfterCall(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2828 | } else { |
| 2829 | ASSERT(flag == JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2830 | SetCallKind(rcx, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2831 | jmp(code); |
| 2832 | } |
| 2833 | bind(&done); |
| 2834 | } |
| 2835 | |
| 2836 | |
| 2837 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 2838 | const ParameterCount& expected, |
| 2839 | const ParameterCount& actual, |
| 2840 | RelocInfo::Mode rmode, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2841 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2842 | const CallWrapper& call_wrapper, |
| 2843 | CallKind call_kind) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2844 | Label done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2845 | Register dummy = rax; |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2846 | InvokePrologue(expected, |
| 2847 | actual, |
| 2848 | code, |
| 2849 | dummy, |
| 2850 | &done, |
| 2851 | flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2852 | Label::kNear, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2853 | call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2854 | call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2855 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 2856 | call_wrapper.BeforeCall(CallSize(code)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2857 | SetCallKind(rcx, call_kind); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2858 | Call(code, rmode); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 2859 | call_wrapper.AfterCall(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2860 | } else { |
| 2861 | ASSERT(flag == JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2862 | SetCallKind(rcx, call_kind); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2863 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2864 | } |
| 2865 | bind(&done); |
| 2866 | } |
| 2867 | |
| 2868 | |
| 2869 | void MacroAssembler::InvokeFunction(Register function, |
| 2870 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2871 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2872 | const CallWrapper& call_wrapper, |
| 2873 | CallKind call_kind) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2874 | ASSERT(function.is(rdi)); |
| 2875 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 2876 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2877 | movsxlq(rbx, |
| 2878 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2879 | // 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] | 2880 | // the executable code. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 2881 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2882 | |
| 2883 | ParameterCount expected(rbx); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2884 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2885 | } |
| 2886 | |
| 2887 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2888 | void MacroAssembler::InvokeFunction(JSFunction* function, |
| 2889 | const ParameterCount& actual, |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2890 | InvokeFlag flag, |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 2891 | const CallWrapper& call_wrapper, |
| 2892 | CallKind call_kind) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2893 | ASSERT(function->is_compiled()); |
| 2894 | // Get the function and setup the context. |
| 2895 | Move(rdi, Handle<JSFunction>(function)); |
| 2896 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 2897 | |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2898 | if (V8::UseCrankshaft()) { |
| 2899 | // Since Crankshaft can recompile a function, we need to load |
| 2900 | // the Code object every time we call the function. |
| 2901 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
| 2902 | ParameterCount expected(function->shared()->formal_parameter_count()); |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 2903 | InvokeCode(rdx, expected, actual, flag, call_wrapper, call_kind); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2904 | } else { |
| 2905 | // Invoke the cached code. |
| 2906 | Handle<Code> code(function->code()); |
| 2907 | ParameterCount expected(function->shared()->formal_parameter_count()); |
fschneider@chromium.org | 3a5fd78 | 2011-02-24 10:10:44 +0000 | [diff] [blame] | 2908 | InvokeCode(code, |
| 2909 | expected, |
| 2910 | actual, |
| 2911 | RelocInfo::CODE_TARGET, |
| 2912 | flag, |
ricow@chromium.org | d2be901 | 2011-06-01 06:00:58 +0000 | [diff] [blame] | 2913 | call_wrapper, |
| 2914 | call_kind); |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 2915 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2916 | } |
| 2917 | |
| 2918 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2919 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 2920 | const ParameterCount& actual, |
| 2921 | Handle<Code> code_constant, |
| 2922 | Register code_register, |
| 2923 | Label* done, |
| 2924 | InvokeFlag flag, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2925 | Label::Distance near_jump, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2926 | const CallWrapper& call_wrapper, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2927 | CallKind call_kind) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2928 | bool definitely_matches = false; |
| 2929 | Label invoke; |
| 2930 | if (expected.is_immediate()) { |
| 2931 | ASSERT(actual.is_immediate()); |
| 2932 | if (expected.immediate() == actual.immediate()) { |
| 2933 | definitely_matches = true; |
| 2934 | } else { |
| 2935 | Set(rax, actual.immediate()); |
| 2936 | if (expected.immediate() == |
| 2937 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
| 2938 | // Don't worry about adapting arguments for built-ins that |
| 2939 | // don't want that done. Skip adaption code by making it look |
| 2940 | // like we have a match between expected and actual number of |
| 2941 | // arguments. |
| 2942 | definitely_matches = true; |
| 2943 | } else { |
| 2944 | Set(rbx, expected.immediate()); |
| 2945 | } |
| 2946 | } |
| 2947 | } else { |
| 2948 | if (actual.is_immediate()) { |
| 2949 | // Expected is in register, actual is immediate. This is the |
| 2950 | // case when we invoke function values without going through the |
| 2951 | // IC mechanism. |
| 2952 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 2953 | j(equal, &invoke, Label::kNear); |
| 2954 | ASSERT(expected.reg().is(rbx)); |
| 2955 | Set(rax, actual.immediate()); |
| 2956 | } else if (!expected.reg().is(actual.reg())) { |
| 2957 | // Both expected and actual are in (different) registers. This |
| 2958 | // is the case when we invoke functions using call and apply. |
| 2959 | cmpq(expected.reg(), actual.reg()); |
| 2960 | j(equal, &invoke, Label::kNear); |
| 2961 | ASSERT(actual.reg().is(rax)); |
| 2962 | ASSERT(expected.reg().is(rbx)); |
| 2963 | } |
| 2964 | } |
| 2965 | |
| 2966 | if (!definitely_matches) { |
| 2967 | Handle<Code> adaptor = isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
| 2968 | if (!code_constant.is_null()) { |
| 2969 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 2970 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 2971 | } else if (!code_register.is(rdx)) { |
| 2972 | movq(rdx, code_register); |
| 2973 | } |
| 2974 | |
| 2975 | if (flag == CALL_FUNCTION) { |
| 2976 | call_wrapper.BeforeCall(CallSize(adaptor)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2977 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2978 | Call(adaptor, RelocInfo::CODE_TARGET); |
| 2979 | call_wrapper.AfterCall(); |
| 2980 | jmp(done, near_jump); |
| 2981 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2982 | SetCallKind(rcx, call_kind); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2983 | Jump(adaptor, RelocInfo::CODE_TARGET); |
| 2984 | } |
| 2985 | bind(&invoke); |
| 2986 | } |
| 2987 | } |
| 2988 | |
| 2989 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2990 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 2991 | push(rbp); |
| 2992 | movq(rbp, rsp); |
| 2993 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2994 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2995 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 2996 | push(kScratchRegister); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 2997 | if (emit_debug_code()) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2998 | movq(kScratchRegister, |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 2999 | isolate()->factory()->undefined_value(), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3000 | RelocInfo::EMBEDDED_OBJECT); |
| 3001 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 3002 | Check(not_equal, "code object not properly patched"); |
| 3003 | } |
| 3004 | } |
| 3005 | |
| 3006 | |
| 3007 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3008 | if (emit_debug_code()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3009 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3010 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 3011 | Check(equal, "stack frame types must match"); |
| 3012 | } |
| 3013 | movq(rsp, rbp); |
| 3014 | pop(rbp); |
| 3015 | } |
| 3016 | |
| 3017 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3018 | void MacroAssembler::EnterExitFramePrologue(bool save_rax) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3019 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 3020 | // 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] | 3021 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 3022 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 3023 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 3024 | push(rbp); |
| 3025 | movq(rbp, rsp); |
| 3026 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3027 | // 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] | 3028 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3029 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 3030 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 3031 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3032 | |
| 3033 | // Save the frame pointer and the context in top. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3034 | if (save_rax) { |
danno@chromium.org | 4d3fe4e | 2011-03-10 10:14:28 +0000 | [diff] [blame] | 3035 | movq(r14, rax); // Backup rax in callee-save register. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3036 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3037 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3038 | Store(ExternalReference(Isolate::k_c_entry_fp_address, isolate()), rbp); |
| 3039 | Store(ExternalReference(Isolate::k_context_address, isolate()), rsi); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3040 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3041 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3042 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3043 | void MacroAssembler::EnterExitFrameEpilogue(int arg_stack_space, |
| 3044 | bool save_doubles) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3045 | #ifdef _WIN64 |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3046 | const int kShadowSpace = 4; |
| 3047 | arg_stack_space += kShadowSpace; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3048 | #endif |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3049 | // Optionally save all XMM registers. |
| 3050 | if (save_doubles) { |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3051 | int space = XMMRegister::kNumRegisters * kDoubleSize + |
| 3052 | arg_stack_space * kPointerSize; |
| 3053 | subq(rsp, Immediate(space)); |
| 3054 | int offset = -2 * kPointerSize; |
| 3055 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3056 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3057 | movsd(Operand(rbp, offset - ((i + 1) * kDoubleSize)), reg); |
| 3058 | } |
| 3059 | } else if (arg_stack_space > 0) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3060 | subq(rsp, Immediate(arg_stack_space * kPointerSize)); |
| 3061 | } |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3062 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3063 | // Get the required frame alignment for the OS. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3064 | const int kFrameAlignment = OS::ActivationFrameAlignment(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3065 | if (kFrameAlignment > 0) { |
| 3066 | ASSERT(IsPowerOf2(kFrameAlignment)); |
ager@chromium.org | a9aa5fa | 2011-04-13 08:46:07 +0000 | [diff] [blame] | 3067 | ASSERT(is_int8(kFrameAlignment)); |
| 3068 | and_(rsp, Immediate(-kFrameAlignment)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3069 | } |
| 3070 | |
| 3071 | // Patch the saved entry sp. |
| 3072 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 3073 | } |
| 3074 | |
| 3075 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3076 | void MacroAssembler::EnterExitFrame(int arg_stack_space, bool save_doubles) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3077 | EnterExitFramePrologue(true); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3078 | |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3079 | // 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] | 3080 | // so it must be retained across the C-call. |
| 3081 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3082 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3083 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3084 | EnterExitFrameEpilogue(arg_stack_space, save_doubles); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3085 | } |
| 3086 | |
| 3087 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3088 | void MacroAssembler::EnterApiExitFrame(int arg_stack_space) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 3089 | EnterExitFramePrologue(false); |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3090 | EnterExitFrameEpilogue(arg_stack_space, false); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 3091 | } |
| 3092 | |
| 3093 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3094 | void MacroAssembler::LeaveExitFrame(bool save_doubles) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3095 | // Registers: |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3096 | // r15 : argv |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3097 | if (save_doubles) { |
| 3098 | int offset = -2 * kPointerSize; |
| 3099 | for (int i = 0; i < XMMRegister::kNumAllocatableRegisters; i++) { |
| 3100 | XMMRegister reg = XMMRegister::FromAllocationIndex(i); |
| 3101 | movsd(reg, Operand(rbp, offset - ((i + 1) * kDoubleSize))); |
| 3102 | } |
| 3103 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3104 | // Get the return address from the stack and restore the frame pointer. |
| 3105 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 3106 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 3107 | |
ager@chromium.org | 0ee099b | 2011-01-25 14:06:47 +0000 | [diff] [blame] | 3108 | // Drop everything up to and including the arguments and the receiver |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3109 | // from the caller stack. |
whesse@chromium.org | b08986c | 2011-03-14 16:13:42 +0000 | [diff] [blame] | 3110 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3111 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 3112 | // Push the return address to get ready to return. |
| 3113 | push(rcx); |
| 3114 | |
| 3115 | LeaveExitFrameEpilogue(); |
| 3116 | } |
| 3117 | |
| 3118 | |
| 3119 | void MacroAssembler::LeaveApiExitFrame() { |
| 3120 | movq(rsp, rbp); |
| 3121 | pop(rbp); |
| 3122 | |
| 3123 | LeaveExitFrameEpilogue(); |
| 3124 | } |
| 3125 | |
| 3126 | |
| 3127 | void MacroAssembler::LeaveExitFrameEpilogue() { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3128 | // Restore current context from top and clear it in debug mode. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3129 | ExternalReference context_address(Isolate::k_context_address, isolate()); |
| 3130 | Operand context_operand = ExternalOperand(context_address); |
| 3131 | movq(rsi, context_operand); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3132 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3133 | movq(context_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3134 | #endif |
| 3135 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3136 | // Clear the top frame. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3137 | ExternalReference c_entry_fp_address(Isolate::k_c_entry_fp_address, |
| 3138 | isolate()); |
| 3139 | Operand c_entry_fp_operand = ExternalOperand(c_entry_fp_address); |
| 3140 | movq(c_entry_fp_operand, Immediate(0)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 3141 | } |
| 3142 | |
| 3143 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3144 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 3145 | Register scratch, |
| 3146 | Label* miss) { |
| 3147 | Label same_contexts; |
| 3148 | |
| 3149 | ASSERT(!holder_reg.is(scratch)); |
| 3150 | ASSERT(!scratch.is(kScratchRegister)); |
| 3151 | // Load current lexical context from the stack frame. |
| 3152 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 3153 | |
| 3154 | // When generating debug code, make sure the lexical context is set. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3155 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3156 | cmpq(scratch, Immediate(0)); |
| 3157 | Check(not_equal, "we should not have an empty lexical context"); |
| 3158 | } |
| 3159 | // Load the global context of the current context. |
| 3160 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 3161 | movq(scratch, FieldOperand(scratch, offset)); |
| 3162 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 3163 | |
| 3164 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3165 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3166 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
danno@chromium.org | 160a7b0 | 2011-04-18 15:51:38 +0000 | [diff] [blame] | 3167 | isolate()->factory()->global_context_map()); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3168 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3169 | } |
| 3170 | |
| 3171 | // Check if both contexts are the same. |
| 3172 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 3173 | j(equal, &same_contexts); |
| 3174 | |
| 3175 | // Compare security tokens. |
| 3176 | // Check that the security token in the calling global object is |
| 3177 | // compatible with the security token in the receiving global |
| 3178 | // object. |
| 3179 | |
| 3180 | // Check the context is a global context. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3181 | if (emit_debug_code()) { |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3182 | // Preserve original value of holder_reg. |
| 3183 | push(holder_reg); |
| 3184 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3185 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3186 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 3187 | |
| 3188 | // Read the first word and compare to global_context_map(), |
| 3189 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3190 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3191 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 3192 | pop(holder_reg); |
| 3193 | } |
| 3194 | |
| 3195 | movq(kScratchRegister, |
| 3196 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 3197 | int token_offset = |
| 3198 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 3199 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 3200 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 3201 | j(not_equal, miss); |
| 3202 | |
| 3203 | bind(&same_contexts); |
| 3204 | } |
| 3205 | |
| 3206 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3207 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3208 | Register scratch, |
| 3209 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3210 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3211 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3212 | |
| 3213 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3214 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3215 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3216 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3217 | #ifdef DEBUG |
| 3218 | // Assert that result actually contains top on entry. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3219 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
| 3220 | cmpq(result, top_operand); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3221 | Check(equal, "Unexpected allocation top"); |
| 3222 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3223 | return; |
| 3224 | } |
| 3225 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3226 | // Move address of new object to result. Use scratch register if available, |
| 3227 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 3228 | if (scratch.is_valid()) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3229 | LoadAddress(scratch, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3230 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3231 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3232 | Load(result, new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3233 | } |
| 3234 | } |
| 3235 | |
| 3236 | |
| 3237 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 3238 | Register scratch) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3239 | if (emit_debug_code()) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3240 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 3241 | Check(zero, "Unaligned allocation in new space"); |
| 3242 | } |
| 3243 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3244 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3245 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3246 | |
| 3247 | // Update new top. |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3248 | if (scratch.is_valid()) { |
| 3249 | // Scratch already contains address of allocation top. |
| 3250 | movq(Operand(scratch, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3251 | } else { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3252 | Store(new_space_allocation_top, result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3253 | } |
| 3254 | } |
| 3255 | |
| 3256 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3257 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 3258 | Register result, |
| 3259 | Register result_end, |
| 3260 | Register scratch, |
| 3261 | Label* gc_required, |
| 3262 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3263 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3264 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3265 | // Trash the registers to simulate an allocation failure. |
| 3266 | movl(result, Immediate(0x7091)); |
| 3267 | if (result_end.is_valid()) { |
| 3268 | movl(result_end, Immediate(0x7191)); |
| 3269 | } |
| 3270 | if (scratch.is_valid()) { |
| 3271 | movl(scratch, Immediate(0x7291)); |
| 3272 | } |
| 3273 | } |
| 3274 | jmp(gc_required); |
| 3275 | return; |
| 3276 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3277 | ASSERT(!result.is(result_end)); |
| 3278 | |
| 3279 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3280 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3281 | |
| 3282 | // Calculate new top and bail out if new space is exhausted. |
| 3283 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3284 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3285 | |
| 3286 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 3287 | |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3288 | if (!top_reg.is(result)) { |
| 3289 | movq(top_reg, result); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3290 | } |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3291 | addq(top_reg, Immediate(object_size)); |
| 3292 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3293 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3294 | cmpq(top_reg, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3295 | j(above, gc_required); |
| 3296 | |
| 3297 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3298 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3299 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3300 | if (top_reg.is(result)) { |
| 3301 | if ((flags & TAG_OBJECT) != 0) { |
| 3302 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 3303 | } else { |
| 3304 | subq(result, Immediate(object_size)); |
| 3305 | } |
| 3306 | } else if ((flags & TAG_OBJECT) != 0) { |
| 3307 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3308 | addq(result, Immediate(kHeapObjectTag)); |
| 3309 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3310 | } |
| 3311 | |
| 3312 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3313 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 3314 | ScaleFactor element_size, |
| 3315 | Register element_count, |
| 3316 | Register result, |
| 3317 | Register result_end, |
| 3318 | Register scratch, |
| 3319 | Label* gc_required, |
| 3320 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3321 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3322 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3323 | // Trash the registers to simulate an allocation failure. |
| 3324 | movl(result, Immediate(0x7091)); |
| 3325 | movl(result_end, Immediate(0x7191)); |
| 3326 | if (scratch.is_valid()) { |
| 3327 | movl(scratch, Immediate(0x7291)); |
| 3328 | } |
| 3329 | // Register element_count is not modified by the function. |
| 3330 | } |
| 3331 | jmp(gc_required); |
| 3332 | return; |
| 3333 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3334 | ASSERT(!result.is(result_end)); |
| 3335 | |
| 3336 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3337 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3338 | |
| 3339 | // Calculate new top and bail out if new space is exhausted. |
| 3340 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3341 | ExternalReference::new_space_allocation_limit_address(isolate()); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3342 | |
| 3343 | // We assume that element_count*element_size + header_size does not |
| 3344 | // overflow. |
| 3345 | lea(result_end, Operand(element_count, element_size, header_size)); |
| 3346 | addq(result_end, result); |
| 3347 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3348 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3349 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3350 | j(above, gc_required); |
| 3351 | |
| 3352 | // Update allocation top. |
| 3353 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3354 | |
| 3355 | // Tag the result if requested. |
| 3356 | if ((flags & TAG_OBJECT) != 0) { |
| 3357 | addq(result, Immediate(kHeapObjectTag)); |
| 3358 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3359 | } |
| 3360 | |
| 3361 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 3362 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 3363 | Register result, |
| 3364 | Register result_end, |
| 3365 | Register scratch, |
| 3366 | Label* gc_required, |
| 3367 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3368 | if (!FLAG_inline_new) { |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3369 | if (emit_debug_code()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 3370 | // Trash the registers to simulate an allocation failure. |
| 3371 | movl(result, Immediate(0x7091)); |
| 3372 | movl(result_end, Immediate(0x7191)); |
| 3373 | if (scratch.is_valid()) { |
| 3374 | movl(scratch, Immediate(0x7291)); |
| 3375 | } |
| 3376 | // object_size is left unchanged by this function. |
| 3377 | } |
| 3378 | jmp(gc_required); |
| 3379 | return; |
| 3380 | } |
| 3381 | ASSERT(!result.is(result_end)); |
| 3382 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3383 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame] | 3384 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3385 | |
| 3386 | // Calculate new top and bail out if new space is exhausted. |
| 3387 | ExternalReference new_space_allocation_limit = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3388 | ExternalReference::new_space_allocation_limit_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3389 | if (!object_size.is(result_end)) { |
| 3390 | movq(result_end, object_size); |
| 3391 | } |
| 3392 | addq(result_end, result); |
erik.corry@gmail.com | d91075f | 2011-02-10 07:45:38 +0000 | [diff] [blame] | 3393 | j(carry, gc_required); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3394 | Operand limit_operand = ExternalOperand(new_space_allocation_limit); |
| 3395 | cmpq(result_end, limit_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3396 | j(above, gc_required); |
| 3397 | |
| 3398 | // Update allocation top. |
| 3399 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 3400 | |
| 3401 | // Tag the result if requested. |
| 3402 | if ((flags & TAG_OBJECT) != 0) { |
| 3403 | addq(result, Immediate(kHeapObjectTag)); |
| 3404 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3405 | } |
| 3406 | |
| 3407 | |
| 3408 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 3409 | ExternalReference new_space_allocation_top = |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3410 | ExternalReference::new_space_allocation_top_address(isolate()); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3411 | |
| 3412 | // Make sure the object has no tag before resetting top. |
| 3413 | and_(object, Immediate(~kHeapObjectTagMask)); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3414 | Operand top_operand = ExternalOperand(new_space_allocation_top); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3415 | #ifdef DEBUG |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3416 | cmpq(object, top_operand); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3417 | Check(below, "Undo allocation of non allocated memory"); |
| 3418 | #endif |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3419 | movq(top_operand, object); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 3420 | } |
| 3421 | |
| 3422 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 3423 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3424 | Register scratch, |
| 3425 | Label* gc_required) { |
| 3426 | // Allocate heap number in new space. |
| 3427 | AllocateInNewSpace(HeapNumber::kSize, |
| 3428 | result, |
| 3429 | scratch, |
| 3430 | no_reg, |
| 3431 | gc_required, |
| 3432 | TAG_OBJECT); |
| 3433 | |
| 3434 | // Set the map. |
| 3435 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 3436 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3437 | } |
| 3438 | |
| 3439 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3440 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 3441 | Register length, |
| 3442 | Register scratch1, |
| 3443 | Register scratch2, |
| 3444 | Register scratch3, |
| 3445 | Label* gc_required) { |
| 3446 | // Calculate the number of bytes needed for the characters in the string while |
| 3447 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3448 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 3449 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3450 | ASSERT(kShortSize == 2); |
| 3451 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3452 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 3453 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3454 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3455 | if (kHeaderAlignment > 0) { |
| 3456 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3457 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3458 | |
| 3459 | // Allocate two byte string in new space. |
| 3460 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 3461 | times_1, |
| 3462 | scratch1, |
| 3463 | result, |
| 3464 | scratch2, |
| 3465 | scratch3, |
| 3466 | gc_required, |
| 3467 | TAG_OBJECT); |
| 3468 | |
| 3469 | // Set the map, length and hash field. |
| 3470 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 3471 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3472 | Integer32ToSmi(scratch1, length); |
| 3473 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3474 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3475 | Immediate(String::kEmptyHashField)); |
| 3476 | } |
| 3477 | |
| 3478 | |
| 3479 | void MacroAssembler::AllocateAsciiString(Register result, |
| 3480 | Register length, |
| 3481 | Register scratch1, |
| 3482 | Register scratch2, |
| 3483 | Register scratch3, |
| 3484 | Label* gc_required) { |
| 3485 | // Calculate the number of bytes needed for the characters in the string while |
| 3486 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3487 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 3488 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3489 | movl(scratch1, length); |
| 3490 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3491 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3492 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3493 | if (kHeaderAlignment > 0) { |
| 3494 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 3495 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3496 | |
| 3497 | // Allocate ascii string in new space. |
| 3498 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 3499 | times_1, |
| 3500 | scratch1, |
| 3501 | result, |
| 3502 | scratch2, |
| 3503 | scratch3, |
| 3504 | gc_required, |
| 3505 | TAG_OBJECT); |
| 3506 | |
| 3507 | // Set the map, length and hash field. |
| 3508 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 3509 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 3510 | Integer32ToSmi(scratch1, length); |
| 3511 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3512 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 3513 | Immediate(String::kEmptyHashField)); |
| 3514 | } |
| 3515 | |
| 3516 | |
| 3517 | void MacroAssembler::AllocateConsString(Register result, |
| 3518 | Register scratch1, |
| 3519 | Register scratch2, |
| 3520 | Label* gc_required) { |
| 3521 | // Allocate heap number in new space. |
| 3522 | AllocateInNewSpace(ConsString::kSize, |
| 3523 | result, |
| 3524 | scratch1, |
| 3525 | scratch2, |
| 3526 | gc_required, |
| 3527 | TAG_OBJECT); |
| 3528 | |
| 3529 | // Set the map. The other fields are left uninitialized. |
| 3530 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 3531 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3532 | } |
| 3533 | |
| 3534 | |
| 3535 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 3536 | Register scratch1, |
| 3537 | Register scratch2, |
| 3538 | Label* gc_required) { |
| 3539 | // Allocate heap number in new space. |
| 3540 | AllocateInNewSpace(ConsString::kSize, |
| 3541 | result, |
| 3542 | scratch1, |
| 3543 | scratch2, |
| 3544 | gc_required, |
| 3545 | TAG_OBJECT); |
| 3546 | |
| 3547 | // Set the map. The other fields are left uninitialized. |
| 3548 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 3549 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 3550 | } |
| 3551 | |
| 3552 | |
fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 3553 | // Copy memory, byte-by-byte, from source to destination. Not optimized for |
| 3554 | // long or aligned copies. The contents of scratch and length are destroyed. |
| 3555 | // Destination is incremented by length, source, length and scratch are |
| 3556 | // clobbered. |
| 3557 | // A simpler loop is faster on small copies, but slower on large ones. |
| 3558 | // The cld() instruction must have been emitted, to set the direction flag(), |
| 3559 | // before calling this function. |
| 3560 | void MacroAssembler::CopyBytes(Register destination, |
| 3561 | Register source, |
| 3562 | Register length, |
| 3563 | int min_length, |
| 3564 | Register scratch) { |
| 3565 | ASSERT(min_length >= 0); |
| 3566 | if (FLAG_debug_code) { |
| 3567 | cmpl(length, Immediate(min_length)); |
| 3568 | Assert(greater_equal, "Invalid min_length"); |
| 3569 | } |
| 3570 | Label loop, done, short_string, short_loop; |
| 3571 | |
| 3572 | const int kLongStringLimit = 20; |
| 3573 | if (min_length <= kLongStringLimit) { |
| 3574 | cmpl(length, Immediate(kLongStringLimit)); |
| 3575 | j(less_equal, &short_string); |
| 3576 | } |
| 3577 | |
| 3578 | ASSERT(source.is(rsi)); |
| 3579 | ASSERT(destination.is(rdi)); |
| 3580 | ASSERT(length.is(rcx)); |
| 3581 | |
| 3582 | // Because source is 8-byte aligned in our uses of this function, |
| 3583 | // we keep source aligned for the rep movs operation by copying the odd bytes |
| 3584 | // at the end of the ranges. |
| 3585 | movq(scratch, length); |
| 3586 | shrl(length, Immediate(3)); |
| 3587 | repmovsq(); |
| 3588 | // Move remaining bytes of length. |
| 3589 | andl(scratch, Immediate(0x7)); |
| 3590 | movq(length, Operand(source, scratch, times_1, -8)); |
| 3591 | movq(Operand(destination, scratch, times_1, -8), length); |
| 3592 | addq(destination, scratch); |
| 3593 | |
| 3594 | if (min_length <= kLongStringLimit) { |
| 3595 | jmp(&done); |
| 3596 | |
| 3597 | bind(&short_string); |
| 3598 | if (min_length == 0) { |
| 3599 | testl(length, length); |
| 3600 | j(zero, &done); |
| 3601 | } |
| 3602 | lea(scratch, Operand(destination, length, times_1, 0)); |
| 3603 | |
| 3604 | bind(&short_loop); |
| 3605 | movb(length, Operand(source, 0)); |
| 3606 | movb(Operand(destination, 0), length); |
| 3607 | incq(source); |
| 3608 | incq(destination); |
| 3609 | cmpq(destination, scratch); |
| 3610 | j(not_equal, &short_loop); |
| 3611 | |
| 3612 | bind(&done); |
| 3613 | } |
| 3614 | } |
| 3615 | |
| 3616 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3617 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 3618 | if (context_chain_length > 0) { |
| 3619 | // 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^] | 3620 | movq(dst, Operand(rsi, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3621 | for (int i = 1; i < context_chain_length; i++) { |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame^] | 3622 | movq(dst, Operand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3623 | } |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 3624 | } else { |
| 3625 | // Slot is in the current function context. Move it into the |
| 3626 | // destination register in case we store into it (the write barrier |
| 3627 | // cannot be allowed to destroy the context in rsi). |
| 3628 | movq(dst, rsi); |
| 3629 | } |
| 3630 | |
| 3631 | // We should not have found a 'with' context by walking the context chain |
| 3632 | // (i.e., the static scope chain and runtime context chain do not agree). |
| 3633 | // A variable occurring in such a scope should have slot type LOOKUP and |
| 3634 | // not CONTEXT. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3635 | if (emit_debug_code()) { |
vegorov@chromium.org | 5d6c1f5 | 2011-02-28 13:13:38 +0000 | [diff] [blame] | 3636 | cmpq(dst, Operand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 3637 | Check(equal, "Yo dawg, I heard you liked function contexts " |
| 3638 | "so I put function contexts in all your contexts"); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3639 | } |
| 3640 | } |
| 3641 | |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3642 | #ifdef _WIN64 |
| 3643 | static const int kRegisterPassedArguments = 4; |
| 3644 | #else |
| 3645 | static const int kRegisterPassedArguments = 6; |
| 3646 | #endif |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3647 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 3648 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| 3649 | // Load the global or builtins object from the current context. |
| 3650 | movq(function, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 3651 | // Load the global context from the global or builtins object. |
| 3652 | movq(function, FieldOperand(function, GlobalObject::kGlobalContextOffset)); |
| 3653 | // Load the function from the global context. |
| 3654 | movq(function, Operand(function, Context::SlotOffset(index))); |
| 3655 | } |
| 3656 | |
| 3657 | |
| 3658 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 3659 | Register map) { |
| 3660 | // Load the initial map. The global functions all have initial maps. |
| 3661 | movq(map, FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3662 | if (emit_debug_code()) { |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 3663 | Label ok, fail; |
kmillikin@chromium.org | c53e10d | 2011-05-18 09:12:58 +0000 | [diff] [blame] | 3664 | CheckMap(map, isolate()->factory()->meta_map(), &fail, DO_SMI_CHECK); |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 3665 | jmp(&ok); |
| 3666 | bind(&fail); |
| 3667 | Abort("Global functions must have initial map"); |
| 3668 | bind(&ok); |
| 3669 | } |
| 3670 | } |
| 3671 | |
| 3672 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3673 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3674 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 3675 | // including the ones passed in registers, and space is always allocated for |
| 3676 | // the four register arguments even if the function takes fewer than four |
| 3677 | // arguments. |
| 3678 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 3679 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3680 | ASSERT(num_arguments >= 0); |
| 3681 | #ifdef _WIN64 |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3682 | const int kMinimumStackSlots = kRegisterPassedArguments; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3683 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 3684 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3685 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3686 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 3687 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3688 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3689 | } |
| 3690 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 3691 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3692 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 3693 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 3694 | ASSERT(frame_alignment != 0); |
| 3695 | ASSERT(num_arguments >= 0); |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3696 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3697 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 3698 | movq(kScratchRegister, rsp); |
| 3699 | ASSERT(IsPowerOf2(frame_alignment)); |
| 3700 | int argument_slots_on_stack = |
| 3701 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 3702 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 3703 | and_(rsp, Immediate(-frame_alignment)); |
| 3704 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 3705 | } |
| 3706 | |
| 3707 | |
| 3708 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 3709 | int num_arguments) { |
sgjesse@chromium.org | ea88ce9 | 2011-03-23 11:19:56 +0000 | [diff] [blame] | 3710 | LoadAddress(rax, function); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3711 | CallCFunction(rax, num_arguments); |
| 3712 | } |
| 3713 | |
| 3714 | |
| 3715 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 3716 | // Check stack alignment. |
ricow@chromium.org | badaffc | 2011-03-17 12:15:27 +0000 | [diff] [blame] | 3717 | if (emit_debug_code()) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 3718 | CheckStackAlignment(); |
| 3719 | } |
| 3720 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 3721 | call(function); |
| 3722 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 3723 | ASSERT(num_arguments >= 0); |
| 3724 | int argument_slots_on_stack = |
| 3725 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 3726 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 3727 | } |
| 3728 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 3729 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 3730 | CodePatcher::CodePatcher(byte* address, int size) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 3731 | : address_(address), |
| 3732 | size_(size), |
| 3733 | masm_(Isolate::Current(), address, size + Assembler::kGap) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 3734 | // Create a new macro assembler pointing to the address of the code to patch. |
| 3735 | // The size is adjusted with kGap on order for the assembler to generate size |
| 3736 | // bytes of instructions without failing with buffer size constraints. |
| 3737 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 3738 | } |
| 3739 | |
| 3740 | |
| 3741 | CodePatcher::~CodePatcher() { |
| 3742 | // Indicate that code has changed. |
| 3743 | CPU::FlushICache(address_, size_); |
| 3744 | |
| 3745 | // Check that the code was patched as expected. |
| 3746 | ASSERT(masm_.pc_ == address_ + size_); |
| 3747 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 3748 | } |
| 3749 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 3750 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 3751 | |
| 3752 | #endif // V8_TARGET_ARCH_X64 |