ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 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" |
| 33 | #include "codegen-inl.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 | |
| 43 | MacroAssembler::MacroAssembler(void* buffer, int size) |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 44 | : Assembler(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), |
| 47 | code_object_(Heap::undefined_value()) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 48 | } |
| 49 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 50 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 51 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 52 | movq(destination, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 56 | void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) { |
| 57 | movq(Operand(kRootRegister, index << kPointerSizeLog2), source); |
| 58 | } |
| 59 | |
| 60 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 61 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 62 | push(Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 66 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 67 | cmpq(with, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 68 | } |
| 69 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 70 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 71 | void MacroAssembler::CompareRoot(Operand with, Heap::RootListIndex index) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 72 | LoadRoot(kScratchRegister, index); |
| 73 | cmpq(with, kScratchRegister); |
| 74 | } |
| 75 | |
| 76 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 77 | void MacroAssembler::StackLimitCheck(Label* on_stack_overflow) { |
| 78 | CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| 79 | j(below, on_stack_overflow); |
| 80 | } |
| 81 | |
| 82 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 83 | void MacroAssembler::RecordWriteHelper(Register object, |
| 84 | Register addr, |
| 85 | Register scratch) { |
| 86 | if (FLAG_debug_code) { |
| 87 | // Check that the object is not in new space. |
| 88 | Label not_in_new_space; |
| 89 | InNewSpace(object, scratch, not_equal, ¬_in_new_space); |
| 90 | Abort("new-space object passed to RecordWriteHelper"); |
| 91 | bind(¬_in_new_space); |
| 92 | } |
| 93 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 94 | // Compute the page start address from the heap object pointer, and reuse |
| 95 | // the 'object' register for it. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 96 | and_(object, Immediate(~Page::kPageAlignmentMask)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 97 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 98 | // Compute number of region covering addr. See Page::GetRegionNumberForAddress |
| 99 | // method for more details. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 100 | shrl(addr, Immediate(Page::kRegionSizeLog2)); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 101 | andl(addr, Immediate(Page::kPageAlignmentMask >> Page::kRegionSizeLog2)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 102 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 103 | // Set dirty mark for region. |
| 104 | bts(Operand(object, Page::kDirtyFlagOffset), addr); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 108 | void MacroAssembler::RecordWrite(Register object, |
| 109 | int offset, |
| 110 | Register value, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 111 | Register index) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 112 | // The compiled code assumes that record write doesn't change the |
| 113 | // context register, so we check that none of the clobbered |
| 114 | // registers are rsi. |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 115 | ASSERT(!object.is(rsi) && !value.is(rsi) && !index.is(rsi)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 116 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 117 | // First, check if a write barrier is even needed. The tests below |
| 118 | // catch stores of Smis and stores into young gen. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 119 | Label done; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 120 | JumpIfSmi(value, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 121 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 122 | RecordWriteNonSmi(object, offset, value, index); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 123 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 124 | |
| 125 | // Clobber all input registers when running with the debug-code flag |
| 126 | // turned on to provoke errors. This clobbering repeats the |
| 127 | // clobbering done inside RecordWriteNonSmi but it's necessary to |
| 128 | // avoid having the fast case for smis leave the registers |
| 129 | // unchanged. |
| 130 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 131 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 132 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 133 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 134 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 138 | void MacroAssembler::RecordWrite(Register object, |
| 139 | Register address, |
| 140 | Register value) { |
| 141 | // The compiled code assumes that record write doesn't change the |
| 142 | // context register, so we check that none of the clobbered |
| 143 | // registers are esi. |
| 144 | ASSERT(!object.is(rsi) && !value.is(rsi) && !address.is(rsi)); |
| 145 | |
| 146 | // First, check if a write barrier is even needed. The tests below |
| 147 | // catch stores of Smis and stores into young gen. |
| 148 | Label done; |
| 149 | JumpIfSmi(value, &done); |
| 150 | |
| 151 | InNewSpace(object, value, equal, &done); |
| 152 | |
| 153 | RecordWriteHelper(object, address, value); |
| 154 | |
| 155 | bind(&done); |
| 156 | |
| 157 | // Clobber all input registers when running with the debug-code flag |
| 158 | // turned on to provoke errors. |
| 159 | if (FLAG_debug_code) { |
| 160 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 161 | movq(address, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 162 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 167 | void MacroAssembler::RecordWriteNonSmi(Register object, |
| 168 | int offset, |
| 169 | Register scratch, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 170 | Register index) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 171 | Label done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 172 | |
| 173 | if (FLAG_debug_code) { |
| 174 | Label okay; |
| 175 | JumpIfNotSmi(object, &okay); |
| 176 | Abort("MacroAssembler::RecordWriteNonSmi cannot deal with smis"); |
| 177 | bind(&okay); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 178 | |
| 179 | if (offset == 0) { |
| 180 | // index must be int32. |
| 181 | Register tmp = index.is(rax) ? rbx : rax; |
| 182 | push(tmp); |
| 183 | movl(tmp, index); |
| 184 | cmpq(tmp, index); |
| 185 | Check(equal, "Index register for RecordWrite must be untagged int32."); |
| 186 | pop(tmp); |
| 187 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 188 | } |
| 189 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 190 | // Test that the object address is not in the new space. We cannot |
| 191 | // update page dirty marks for new space pages. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 192 | InNewSpace(object, scratch, equal, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 193 | |
whesse@chromium.org | e88a9ed | 2010-04-15 15:07:46 +0000 | [diff] [blame] | 194 | // The offset is relative to a tagged or untagged HeapObject pointer, |
| 195 | // so either offset or offset + kHeapObjectTag must be a |
| 196 | // multiple of kPointerSize. |
| 197 | ASSERT(IsAligned(offset, kPointerSize) || |
| 198 | IsAligned(offset + kHeapObjectTag, kPointerSize)); |
| 199 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 200 | Register dst = index; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 201 | if (offset != 0) { |
| 202 | lea(dst, Operand(object, offset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 203 | } else { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 204 | // array access: calculate the destination address in the same manner as |
| 205 | // KeyedStoreIC::GenerateGeneric. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 206 | lea(dst, FieldOperand(object, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 207 | index, |
| 208 | times_pointer_size, |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 209 | FixedArray::kHeaderSize)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 210 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 211 | RecordWriteHelper(object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 212 | |
| 213 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 214 | |
| 215 | // Clobber all input registers when running with the debug-code flag |
| 216 | // turned on to provoke errors. |
| 217 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 218 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 219 | movq(scratch, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 220 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 221 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 225 | void MacroAssembler::InNewSpace(Register object, |
| 226 | Register scratch, |
| 227 | Condition cc, |
| 228 | Label* branch) { |
| 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()); |
| 236 | and_(scratch, kScratchRegister); |
| 237 | } else { |
| 238 | movq(scratch, ExternalReference::new_space_mask()); |
| 239 | and_(scratch, object); |
| 240 | } |
| 241 | movq(kScratchRegister, ExternalReference::new_space_start()); |
| 242 | cmpq(scratch, kScratchRegister); |
| 243 | j(cc, branch); |
| 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); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 260 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
| 261 | if (FLAG_debug_code) Check(cc, msg); |
| 262 | } |
| 263 | |
| 264 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame^] | 265 | void MacroAssembler::AssertFastElements(Register elements) { |
| 266 | if (FLAG_debug_code) { |
| 267 | Label ok; |
| 268 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 269 | Heap::kFixedArrayMapRootIndex); |
| 270 | j(equal, &ok); |
| 271 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 272 | Heap::kFixedCOWArrayMapRootIndex); |
| 273 | j(equal, &ok); |
| 274 | Abort("JSObject with fast elements map has slow elements"); |
| 275 | bind(&ok); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 280 | void MacroAssembler::Check(Condition cc, const char* msg) { |
| 281 | Label L; |
| 282 | j(cc, &L); |
| 283 | Abort(msg); |
| 284 | // will not return here |
| 285 | bind(&L); |
| 286 | } |
| 287 | |
| 288 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 289 | void MacroAssembler::CheckStackAlignment() { |
| 290 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 291 | int frame_alignment_mask = frame_alignment - 1; |
| 292 | if (frame_alignment > kPointerSize) { |
| 293 | ASSERT(IsPowerOf2(frame_alignment)); |
| 294 | Label alignment_as_expected; |
| 295 | testq(rsp, Immediate(frame_alignment_mask)); |
| 296 | j(zero, &alignment_as_expected); |
| 297 | // Abort if stack is not aligned. |
| 298 | int3(); |
| 299 | bind(&alignment_as_expected); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 304 | void MacroAssembler::NegativeZeroTest(Register result, |
| 305 | Register op, |
| 306 | Label* then_label) { |
| 307 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 308 | testl(result, result); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 309 | j(not_zero, &ok); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 310 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 311 | j(sign, then_label); |
| 312 | bind(&ok); |
| 313 | } |
| 314 | |
| 315 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 316 | void MacroAssembler::Abort(const char* msg) { |
| 317 | // We want to pass the msg string like a smi to avoid GC |
| 318 | // problems, however msg is not guaranteed to be aligned |
| 319 | // properly. Instead, we pass an aligned pointer that is |
| 320 | // a proper v8 smi, but also pass the alignment difference |
| 321 | // from the real pointer as a smi. |
| 322 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 323 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 324 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 325 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 326 | #ifdef DEBUG |
| 327 | if (msg != NULL) { |
| 328 | RecordComment("Abort message: "); |
| 329 | RecordComment(msg); |
| 330 | } |
| 331 | #endif |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 332 | // Disable stub call restrictions to always allow calls to abort. |
| 333 | set_allow_stub_calls(true); |
| 334 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 335 | push(rax); |
| 336 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 337 | push(kScratchRegister); |
| 338 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 339 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 340 | RelocInfo::NONE); |
| 341 | push(kScratchRegister); |
| 342 | CallRuntime(Runtime::kAbort, 2); |
| 343 | // will not return here |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 344 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | |
| 348 | void MacroAssembler::CallStub(CodeStub* stub) { |
| 349 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 350 | Call(stub->GetCode(), RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 354 | Object* MacroAssembler::TryCallStub(CodeStub* stub) { |
| 355 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
| 356 | Object* result = stub->TryGetCode(); |
| 357 | if (!result->IsFailure()) { |
| 358 | call(Handle<Code>(Code::cast(result)), RelocInfo::CODE_TARGET); |
| 359 | } |
| 360 | return result; |
| 361 | } |
| 362 | |
| 363 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 364 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
| 365 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
| 366 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 367 | } |
| 368 | |
| 369 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 370 | Object* MacroAssembler::TryTailCallStub(CodeStub* stub) { |
| 371 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
| 372 | Object* result = stub->TryGetCode(); |
| 373 | if (!result->IsFailure()) { |
| 374 | jmp(Handle<Code>(Code::cast(result)), RelocInfo::CODE_TARGET); |
| 375 | } |
| 376 | return result; |
| 377 | } |
| 378 | |
| 379 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 380 | void MacroAssembler::StubReturn(int argc) { |
| 381 | ASSERT(argc >= 1 && generating_stub()); |
| 382 | ret((argc - 1) * kPointerSize); |
| 383 | } |
| 384 | |
| 385 | |
| 386 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 387 | if (num_arguments > 0) { |
| 388 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 389 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 390 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 391 | } |
| 392 | |
| 393 | |
| 394 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 395 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 396 | } |
| 397 | |
| 398 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 399 | Object* MacroAssembler::TryCallRuntime(Runtime::FunctionId id, |
| 400 | int num_arguments) { |
| 401 | return TryCallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 402 | } |
| 403 | |
| 404 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 405 | void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| 406 | // If the expected number of arguments of the runtime function is |
| 407 | // constant, we check that the actual number of arguments match the |
| 408 | // expectation. |
| 409 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 410 | IllegalOperation(num_arguments); |
| 411 | return; |
| 412 | } |
| 413 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 414 | // TODO(1236192): Most runtime routines don't need the number of |
| 415 | // arguments passed in because it is constant. At some point we |
| 416 | // should remove this need and make the runtime routine entry code |
| 417 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 418 | Set(rax, num_arguments); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 419 | movq(rbx, ExternalReference(f)); |
| 420 | CEntryStub ces(f->result_size); |
| 421 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 425 | Object* MacroAssembler::TryCallRuntime(Runtime::Function* f, |
| 426 | int num_arguments) { |
| 427 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 428 | IllegalOperation(num_arguments); |
| 429 | // Since we did not call the stub, there was no allocation failure. |
| 430 | // Return some non-failure object. |
| 431 | return Heap::undefined_value(); |
| 432 | } |
| 433 | |
| 434 | // TODO(1236192): Most runtime routines don't need the number of |
| 435 | // arguments passed in because it is constant. At some point we |
| 436 | // should remove this need and make the runtime routine entry code |
| 437 | // smarter. |
| 438 | Set(rax, num_arguments); |
| 439 | movq(rbx, ExternalReference(f)); |
| 440 | CEntryStub ces(f->result_size); |
| 441 | return TryCallStub(&ces); |
| 442 | } |
| 443 | |
| 444 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 445 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 446 | int num_arguments) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 447 | Set(rax, num_arguments); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 448 | movq(rbx, ext); |
| 449 | |
| 450 | CEntryStub stub(1); |
| 451 | CallStub(&stub); |
| 452 | } |
| 453 | |
| 454 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 455 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 456 | int num_arguments, |
| 457 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 458 | // ----------- S t a t e ------------- |
| 459 | // -- rsp[0] : return address |
| 460 | // -- rsp[8] : argument num_arguments - 1 |
| 461 | // ... |
| 462 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 463 | // ----------------------------------- |
| 464 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 465 | // TODO(1236192): Most runtime routines don't need the number of |
| 466 | // arguments passed in because it is constant. At some point we |
| 467 | // should remove this need and make the runtime routine entry code |
| 468 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 469 | Set(rax, num_arguments); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 470 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 474 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 475 | int num_arguments, |
| 476 | int result_size) { |
| 477 | TailCallExternalReference(ExternalReference(fid), num_arguments, result_size); |
| 478 | } |
| 479 | |
| 480 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 481 | static int Offset(ExternalReference ref0, ExternalReference ref1) { |
| 482 | int64_t offset = (ref0.address() - ref1.address()); |
| 483 | // Check that fits into int. |
| 484 | ASSERT(static_cast<int>(offset) == offset); |
| 485 | return static_cast<int>(offset); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | void MacroAssembler::PushHandleScope(Register scratch) { |
| 490 | ExternalReference extensions_address = |
| 491 | ExternalReference::handle_scope_extensions_address(); |
| 492 | const int kExtensionsOffset = 0; |
| 493 | const int kNextOffset = Offset( |
| 494 | ExternalReference::handle_scope_next_address(), |
| 495 | extensions_address); |
| 496 | const int kLimitOffset = Offset( |
| 497 | ExternalReference::handle_scope_limit_address(), |
| 498 | extensions_address); |
| 499 | |
| 500 | // Push the number of extensions, smi-tagged so the gc will ignore it. |
| 501 | movq(kScratchRegister, extensions_address); |
| 502 | movq(scratch, Operand(kScratchRegister, kExtensionsOffset)); |
| 503 | movq(Operand(kScratchRegister, kExtensionsOffset), Immediate(0)); |
| 504 | Integer32ToSmi(scratch, scratch); |
| 505 | push(scratch); |
| 506 | // Push next and limit pointers which will be wordsize aligned and |
| 507 | // hence automatically smi tagged. |
| 508 | push(Operand(kScratchRegister, kNextOffset)); |
| 509 | push(Operand(kScratchRegister, kLimitOffset)); |
| 510 | } |
| 511 | |
| 512 | |
| 513 | Object* MacroAssembler::PopHandleScopeHelper(Register saved, |
| 514 | Register scratch, |
| 515 | bool gc_allowed) { |
| 516 | ExternalReference extensions_address = |
| 517 | ExternalReference::handle_scope_extensions_address(); |
| 518 | const int kExtensionsOffset = 0; |
| 519 | const int kNextOffset = Offset( |
| 520 | ExternalReference::handle_scope_next_address(), |
| 521 | extensions_address); |
| 522 | const int kLimitOffset = Offset( |
| 523 | ExternalReference::handle_scope_limit_address(), |
| 524 | extensions_address); |
| 525 | |
| 526 | Object* result = NULL; |
| 527 | Label write_back; |
| 528 | movq(kScratchRegister, extensions_address); |
| 529 | cmpq(Operand(kScratchRegister, kExtensionsOffset), Immediate(0)); |
| 530 | j(equal, &write_back); |
| 531 | push(saved); |
| 532 | if (gc_allowed) { |
| 533 | CallRuntime(Runtime::kDeleteHandleScopeExtensions, 0); |
| 534 | } else { |
| 535 | result = TryCallRuntime(Runtime::kDeleteHandleScopeExtensions, 0); |
| 536 | if (result->IsFailure()) return result; |
| 537 | } |
| 538 | pop(saved); |
| 539 | movq(kScratchRegister, extensions_address); |
| 540 | |
| 541 | bind(&write_back); |
| 542 | pop(Operand(kScratchRegister, kLimitOffset)); |
| 543 | pop(Operand(kScratchRegister, kNextOffset)); |
| 544 | pop(scratch); |
| 545 | SmiToInteger32(scratch, scratch); |
| 546 | movq(Operand(kScratchRegister, kExtensionsOffset), scratch); |
| 547 | |
| 548 | return result; |
| 549 | } |
| 550 | |
| 551 | |
| 552 | void MacroAssembler::PopHandleScope(Register saved, Register scratch) { |
| 553 | PopHandleScopeHelper(saved, scratch, true); |
| 554 | } |
| 555 | |
| 556 | |
| 557 | Object* MacroAssembler::TryPopHandleScope(Register saved, Register scratch) { |
| 558 | return PopHandleScopeHelper(saved, scratch, false); |
| 559 | } |
| 560 | |
| 561 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 562 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 563 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 564 | // Set the entry point and jump to the C entry runtime stub. |
| 565 | movq(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 566 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 567 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 568 | } |
| 569 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 570 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 571 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| 572 | // Calls are not allowed in some stubs. |
| 573 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 574 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 575 | // Rely on the assertion to check that the number of provided |
| 576 | // arguments match the expected number of arguments. Fake a |
| 577 | // parameter count to avoid emitting code to do the check. |
| 578 | ParameterCount expected(0); |
| 579 | GetBuiltinEntry(rdx, id); |
| 580 | InvokeCode(rdx, expected, expected, flag); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 581 | } |
| 582 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 583 | |
| 584 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 585 | ASSERT(!target.is(rdi)); |
| 586 | |
| 587 | // Load the builtins object into target register. |
| 588 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 589 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
| 590 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 591 | // Load the JavaScript builtin function from the builtins object. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 592 | movq(rdi, FieldOperand(target, JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 593 | |
| 594 | // Load the code entry point from the builtins object. |
| 595 | movq(target, FieldOperand(target, JSBuiltinsObject::OffsetOfCodeWithId(id))); |
| 596 | if (FLAG_debug_code) { |
| 597 | // Make sure the code objects in the builtins object and in the |
| 598 | // builtin function are the same. |
| 599 | push(target); |
vegorov@chromium.org | 26c16f8 | 2010-08-11 13:41:03 +0000 | [diff] [blame] | 600 | movq(target, FieldOperand(rdi, JSFunction::kCodeOffset)); |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 601 | cmpq(target, Operand(rsp, 0)); |
| 602 | Assert(equal, "Builtin code object changed"); |
| 603 | pop(target); |
| 604 | } |
| 605 | lea(target, FieldOperand(target, Code::kHeaderSize)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 609 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 610 | if (x == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 611 | xorl(dst, dst); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 612 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 613 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 614 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 615 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 616 | } else { |
| 617 | movq(dst, x, RelocInfo::NONE); |
| 618 | } |
| 619 | } |
| 620 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 621 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 622 | if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 623 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 624 | } else { |
| 625 | movq(kScratchRegister, x, RelocInfo::NONE); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 626 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 627 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 628 | } |
| 629 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 630 | // ---------------------------------------------------------------------------- |
| 631 | // Smi tagging, untagging and tag detection. |
| 632 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 633 | static int kSmiShift = kSmiTagSize + kSmiShiftSize; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 634 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 635 | Register MacroAssembler::GetSmiConstant(Smi* source) { |
| 636 | int value = source->value(); |
| 637 | if (value == 0) { |
| 638 | xorl(kScratchRegister, kScratchRegister); |
| 639 | return kScratchRegister; |
| 640 | } |
| 641 | if (value == 1) { |
| 642 | return kSmiConstantRegister; |
| 643 | } |
| 644 | LoadSmiConstant(kScratchRegister, source); |
| 645 | return kScratchRegister; |
| 646 | } |
| 647 | |
| 648 | void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) { |
| 649 | if (FLAG_debug_code) { |
| 650 | movq(dst, |
| 651 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 652 | RelocInfo::NONE); |
| 653 | cmpq(dst, kSmiConstantRegister); |
| 654 | if (allow_stub_calls()) { |
| 655 | Assert(equal, "Uninitialized kSmiConstantRegister"); |
| 656 | } else { |
| 657 | Label ok; |
| 658 | j(equal, &ok); |
| 659 | int3(); |
| 660 | bind(&ok); |
| 661 | } |
| 662 | } |
| 663 | if (source->value() == 0) { |
| 664 | xorl(dst, dst); |
| 665 | return; |
| 666 | } |
| 667 | int value = source->value(); |
| 668 | bool negative = value < 0; |
| 669 | unsigned int uvalue = negative ? -value : value; |
| 670 | |
| 671 | switch (uvalue) { |
| 672 | case 9: |
| 673 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_8, 0)); |
| 674 | break; |
| 675 | case 8: |
| 676 | xorl(dst, dst); |
| 677 | lea(dst, Operand(dst, kSmiConstantRegister, times_8, 0)); |
| 678 | break; |
| 679 | case 4: |
| 680 | xorl(dst, dst); |
| 681 | lea(dst, Operand(dst, kSmiConstantRegister, times_4, 0)); |
| 682 | break; |
| 683 | case 5: |
| 684 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_4, 0)); |
| 685 | break; |
| 686 | case 3: |
| 687 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_2, 0)); |
| 688 | break; |
| 689 | case 2: |
| 690 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_1, 0)); |
| 691 | break; |
| 692 | case 1: |
| 693 | movq(dst, kSmiConstantRegister); |
| 694 | break; |
| 695 | case 0: |
| 696 | UNREACHABLE(); |
| 697 | return; |
| 698 | default: |
| 699 | movq(dst, reinterpret_cast<uint64_t>(source), RelocInfo::NONE); |
| 700 | return; |
| 701 | } |
| 702 | if (negative) { |
| 703 | neg(dst); |
| 704 | } |
| 705 | } |
| 706 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 707 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 708 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 709 | if (!dst.is(src)) { |
| 710 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 711 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 712 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | |
| 716 | void MacroAssembler::Integer32ToSmi(Register dst, |
| 717 | Register src, |
| 718 | Label* on_overflow) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 719 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 720 | // 32-bit integer always fits in a long smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 721 | if (!dst.is(src)) { |
| 722 | movl(dst, src); |
| 723 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 724 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 728 | void MacroAssembler::Integer32ToSmiField(const Operand& dst, Register src) { |
| 729 | if (FLAG_debug_code) { |
| 730 | testb(dst, Immediate(0x01)); |
| 731 | Label ok; |
| 732 | j(zero, &ok); |
| 733 | if (allow_stub_calls()) { |
| 734 | Abort("Integer32ToSmiField writing to non-smi location"); |
| 735 | } else { |
| 736 | int3(); |
| 737 | } |
| 738 | bind(&ok); |
| 739 | } |
| 740 | ASSERT(kSmiShift % kBitsPerByte == 0); |
| 741 | movl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 742 | } |
| 743 | |
| 744 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 745 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 746 | Register src, |
| 747 | int constant) { |
| 748 | if (dst.is(src)) { |
| 749 | addq(dst, Immediate(constant)); |
| 750 | } else { |
| 751 | lea(dst, Operand(src, constant)); |
| 752 | } |
| 753 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | |
| 757 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 758 | ASSERT_EQ(0, kSmiTag); |
| 759 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 760 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 761 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 762 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 766 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 767 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 768 | } |
| 769 | |
| 770 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 771 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 772 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 773 | if (!dst.is(src)) { |
| 774 | movq(dst, src); |
| 775 | } |
| 776 | sar(dst, Immediate(kSmiShift)); |
| 777 | } |
| 778 | |
| 779 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 780 | void MacroAssembler::SmiToInteger64(Register dst, const Operand& src) { |
| 781 | movsxlq(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 782 | } |
| 783 | |
| 784 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 785 | void MacroAssembler::SmiTest(Register src) { |
| 786 | testq(src, src); |
| 787 | } |
| 788 | |
| 789 | |
| 790 | void MacroAssembler::SmiCompare(Register dst, Register src) { |
| 791 | cmpq(dst, src); |
| 792 | } |
| 793 | |
| 794 | |
| 795 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
| 796 | ASSERT(!dst.is(kScratchRegister)); |
| 797 | if (src->value() == 0) { |
| 798 | testq(dst, dst); |
| 799 | } else { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 800 | Register constant_reg = GetSmiConstant(src); |
| 801 | cmpq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 802 | } |
| 803 | } |
| 804 | |
| 805 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 806 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 807 | cmpq(dst, src); |
| 808 | } |
| 809 | |
| 810 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 811 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
| 812 | cmpq(dst, src); |
| 813 | } |
| 814 | |
| 815 | |
| 816 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 817 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 818 | } |
| 819 | |
| 820 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 821 | void MacroAssembler::SmiCompareInteger32(const Operand& dst, Register src) { |
| 822 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 823 | } |
| 824 | |
| 825 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 826 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 827 | Register src, |
| 828 | int power) { |
| 829 | ASSERT(power >= 0); |
| 830 | ASSERT(power < 64); |
| 831 | if (power == 0) { |
| 832 | SmiToInteger64(dst, src); |
| 833 | return; |
| 834 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 835 | if (!dst.is(src)) { |
| 836 | movq(dst, src); |
| 837 | } |
| 838 | if (power < kSmiShift) { |
| 839 | sar(dst, Immediate(kSmiShift - power)); |
| 840 | } else if (power > kSmiShift) { |
| 841 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 842 | } |
| 843 | } |
| 844 | |
| 845 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 846 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 847 | Register src, |
| 848 | int power) { |
| 849 | ASSERT((0 <= power) && (power < 32)); |
| 850 | if (dst.is(src)) { |
| 851 | shr(dst, Immediate(power + kSmiShift)); |
| 852 | } else { |
| 853 | UNIMPLEMENTED(); // Not used. |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 858 | Condition MacroAssembler::CheckSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 859 | ASSERT_EQ(0, kSmiTag); |
| 860 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 861 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | |
| 865 | Condition MacroAssembler::CheckPositiveSmi(Register src) { |
| 866 | ASSERT_EQ(0, kSmiTag); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 867 | // Make mask 0x8000000000000001 and test that both bits are zero. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 868 | movq(kScratchRegister, src); |
| 869 | rol(kScratchRegister, Immediate(1)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 870 | testb(kScratchRegister, Immediate(3)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 871 | return zero; |
| 872 | } |
| 873 | |
| 874 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 875 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 876 | if (first.is(second)) { |
| 877 | return CheckSmi(first); |
| 878 | } |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 879 | ASSERT(kSmiTag == 0 && kHeapObjectTag == 1 && kHeapObjectTagMask == 3); |
| 880 | leal(kScratchRegister, Operand(first, second, times_1, 0)); |
| 881 | testb(kScratchRegister, Immediate(0x03)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 882 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 883 | } |
| 884 | |
| 885 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 886 | Condition MacroAssembler::CheckBothPositiveSmi(Register first, |
| 887 | Register second) { |
| 888 | if (first.is(second)) { |
| 889 | return CheckPositiveSmi(first); |
| 890 | } |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 891 | movq(kScratchRegister, first); |
| 892 | or_(kScratchRegister, second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 893 | rol(kScratchRegister, Immediate(1)); |
| 894 | testl(kScratchRegister, Immediate(0x03)); |
| 895 | return zero; |
| 896 | } |
| 897 | |
| 898 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 899 | Condition MacroAssembler::CheckEitherSmi(Register first, |
| 900 | Register second, |
| 901 | Register scratch) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 902 | if (first.is(second)) { |
| 903 | return CheckSmi(first); |
| 904 | } |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 905 | if (scratch.is(second)) { |
| 906 | andl(scratch, first); |
| 907 | } else { |
| 908 | if (!scratch.is(first)) { |
| 909 | movl(scratch, first); |
| 910 | } |
| 911 | andl(scratch, second); |
| 912 | } |
| 913 | testb(scratch, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 914 | return zero; |
| 915 | } |
| 916 | |
| 917 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 918 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 919 | ASSERT(!src.is(kScratchRegister)); |
| 920 | // If we overflow by subtracting one, it's the minimal smi value. |
| 921 | cmpq(src, kSmiConstantRegister); |
| 922 | return overflow; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 923 | } |
| 924 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 925 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 926 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 927 | // A 32-bit integer value can always be converted to a smi. |
| 928 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 932 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 933 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 934 | // is not set. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 935 | testl(src, src); |
| 936 | return positive; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 940 | void MacroAssembler::SmiNeg(Register dst, Register src, Label* on_smi_result) { |
| 941 | if (dst.is(src)) { |
| 942 | ASSERT(!dst.is(kScratchRegister)); |
| 943 | movq(kScratchRegister, src); |
| 944 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 945 | // Test if result is zero or Smi::kMinValue. |
| 946 | cmpq(dst, kScratchRegister); |
| 947 | j(not_equal, on_smi_result); |
| 948 | movq(src, kScratchRegister); |
| 949 | } else { |
| 950 | movq(dst, src); |
| 951 | neg(dst); |
| 952 | cmpq(dst, src); |
| 953 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 954 | j(not_equal, on_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 955 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | |
| 959 | void MacroAssembler::SmiAdd(Register dst, |
| 960 | Register src1, |
| 961 | Register src2, |
| 962 | Label* on_not_smi_result) { |
| 963 | ASSERT(!dst.is(src2)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 964 | if (on_not_smi_result == NULL) { |
| 965 | // No overflow checking. Use only when it's known that |
| 966 | // overflowing is impossible. |
| 967 | if (dst.is(src1)) { |
| 968 | addq(dst, src2); |
| 969 | } else { |
| 970 | movq(dst, src1); |
| 971 | addq(dst, src2); |
| 972 | } |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 973 | Assert(no_overflow, "Smi addition overflow"); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 974 | } else if (dst.is(src1)) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 975 | movq(kScratchRegister, src1); |
| 976 | addq(kScratchRegister, src2); |
| 977 | j(overflow, on_not_smi_result); |
| 978 | movq(dst, kScratchRegister); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 979 | } else { |
| 980 | movq(dst, src1); |
| 981 | addq(dst, src2); |
| 982 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 983 | } |
| 984 | } |
| 985 | |
| 986 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 987 | void MacroAssembler::SmiSub(Register dst, |
| 988 | Register src1, |
| 989 | Register src2, |
| 990 | Label* on_not_smi_result) { |
| 991 | ASSERT(!dst.is(src2)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 992 | if (on_not_smi_result == NULL) { |
| 993 | // No overflow checking. Use only when it's known that |
| 994 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 995 | if (dst.is(src1)) { |
| 996 | subq(dst, src2); |
| 997 | } else { |
| 998 | movq(dst, src1); |
| 999 | subq(dst, src2); |
| 1000 | } |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1001 | Assert(no_overflow, "Smi subtraction overflow"); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1002 | } else if (dst.is(src1)) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1003 | cmpq(dst, src2); |
| 1004 | j(overflow, on_not_smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1005 | subq(dst, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1006 | } else { |
| 1007 | movq(dst, src1); |
| 1008 | subq(dst, src2); |
| 1009 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1010 | } |
| 1011 | } |
| 1012 | |
| 1013 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1014 | void MacroAssembler::SmiSub(Register dst, |
| 1015 | Register src1, |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1016 | const Operand& src2, |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1017 | Label* on_not_smi_result) { |
| 1018 | if (on_not_smi_result == NULL) { |
| 1019 | // No overflow checking. Use only when it's known that |
| 1020 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1021 | if (dst.is(src1)) { |
| 1022 | subq(dst, src2); |
| 1023 | } else { |
| 1024 | movq(dst, src1); |
| 1025 | subq(dst, src2); |
| 1026 | } |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1027 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1028 | } else if (dst.is(src1)) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1029 | movq(kScratchRegister, src2); |
| 1030 | cmpq(src1, kScratchRegister); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1031 | j(overflow, on_not_smi_result); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1032 | subq(src1, kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1033 | } else { |
| 1034 | movq(dst, src1); |
| 1035 | subq(dst, src2); |
| 1036 | j(overflow, on_not_smi_result); |
| 1037 | } |
| 1038 | } |
| 1039 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1040 | void MacroAssembler::SmiMul(Register dst, |
| 1041 | Register src1, |
| 1042 | Register src2, |
| 1043 | Label* on_not_smi_result) { |
| 1044 | ASSERT(!dst.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1045 | ASSERT(!dst.is(kScratchRegister)); |
| 1046 | ASSERT(!src1.is(kScratchRegister)); |
| 1047 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1048 | |
| 1049 | if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1050 | Label failure, zero_correct_result; |
| 1051 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 1052 | SmiToInteger64(dst, src1); |
| 1053 | imul(dst, src2); |
| 1054 | j(overflow, &failure); |
| 1055 | |
| 1056 | // Check for negative zero result. If product is zero, and one |
| 1057 | // argument is negative, go to slow case. |
| 1058 | Label correct_result; |
| 1059 | testq(dst, dst); |
| 1060 | j(not_zero, &correct_result); |
| 1061 | |
| 1062 | movq(dst, kScratchRegister); |
| 1063 | xor_(dst, src2); |
| 1064 | j(positive, &zero_correct_result); // Result was positive zero. |
| 1065 | |
| 1066 | bind(&failure); // Reused failure exit, restores src1. |
| 1067 | movq(src1, kScratchRegister); |
| 1068 | jmp(on_not_smi_result); |
| 1069 | |
| 1070 | bind(&zero_correct_result); |
| 1071 | xor_(dst, dst); |
| 1072 | |
| 1073 | bind(&correct_result); |
| 1074 | } else { |
| 1075 | SmiToInteger64(dst, src1); |
| 1076 | imul(dst, src2); |
| 1077 | j(overflow, on_not_smi_result); |
| 1078 | // Check for negative zero result. If product is zero, and one |
| 1079 | // argument is negative, go to slow case. |
| 1080 | Label correct_result; |
| 1081 | testq(dst, dst); |
| 1082 | j(not_zero, &correct_result); |
| 1083 | // One of src1 and src2 is zero, the check whether the other is |
| 1084 | // negative. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1085 | movq(kScratchRegister, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1086 | xor_(kScratchRegister, src2); |
| 1087 | j(negative, on_not_smi_result); |
| 1088 | bind(&correct_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1089 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1090 | } |
| 1091 | |
| 1092 | |
| 1093 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 1094 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1095 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1096 | Label* on_not_smi_result) { |
| 1097 | // Does not assume that src is a smi. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1098 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1099 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1100 | ASSERT(!dst.is(kScratchRegister)); |
| 1101 | ASSERT(!src.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1102 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1103 | JumpIfNotSmi(src, on_not_smi_result); |
| 1104 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1105 | LoadSmiConstant(tmp, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1106 | addq(tmp, src); |
| 1107 | j(overflow, on_not_smi_result); |
| 1108 | if (dst.is(src)) { |
| 1109 | movq(dst, tmp); |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | |
| 1114 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 1115 | if (constant->value() == 0) { |
| 1116 | if (!dst.is(src)) { |
| 1117 | movq(dst, src); |
| 1118 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1119 | return; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1120 | } else if (dst.is(src)) { |
| 1121 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1122 | switch (constant->value()) { |
| 1123 | case 1: |
| 1124 | addq(dst, kSmiConstantRegister); |
| 1125 | return; |
| 1126 | case 2: |
| 1127 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1128 | return; |
| 1129 | case 4: |
| 1130 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1131 | return; |
| 1132 | case 8: |
| 1133 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1134 | return; |
| 1135 | default: |
| 1136 | Register constant_reg = GetSmiConstant(constant); |
| 1137 | addq(dst, constant_reg); |
| 1138 | return; |
| 1139 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1140 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1141 | switch (constant->value()) { |
| 1142 | case 1: |
| 1143 | lea(dst, Operand(src, kSmiConstantRegister, times_1, 0)); |
| 1144 | return; |
| 1145 | case 2: |
| 1146 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1147 | return; |
| 1148 | case 4: |
| 1149 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1150 | return; |
| 1151 | case 8: |
| 1152 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1153 | return; |
| 1154 | default: |
| 1155 | LoadSmiConstant(dst, constant); |
| 1156 | addq(dst, src); |
| 1157 | return; |
| 1158 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1163 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 1164 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1165 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1170 | void MacroAssembler::SmiAddConstant(Register dst, |
| 1171 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1172 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1173 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1174 | if (constant->value() == 0) { |
| 1175 | if (!dst.is(src)) { |
| 1176 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1177 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1178 | } else if (dst.is(src)) { |
| 1179 | ASSERT(!dst.is(kScratchRegister)); |
| 1180 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1181 | LoadSmiConstant(kScratchRegister, constant); |
| 1182 | addq(kScratchRegister, src); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1183 | j(overflow, on_not_smi_result); |
| 1184 | movq(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1185 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1186 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1187 | addq(dst, src); |
| 1188 | j(overflow, on_not_smi_result); |
| 1189 | } |
| 1190 | } |
| 1191 | |
| 1192 | |
| 1193 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 1194 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1195 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1196 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1197 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1198 | } else if (dst.is(src)) { |
| 1199 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1200 | Register constant_reg = GetSmiConstant(constant); |
| 1201 | subq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1202 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1203 | if (constant->value() == Smi::kMinValue) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1204 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1205 | // Adding and subtracting the min-value gives the same result, it only |
| 1206 | // differs on the overflow bit, which we don't check here. |
| 1207 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1208 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1209 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1210 | LoadSmiConstant(dst, Smi::FromInt(-constant->value())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1211 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1212 | } |
| 1213 | } |
| 1214 | } |
| 1215 | |
| 1216 | |
| 1217 | void MacroAssembler::SmiSubConstant(Register dst, |
| 1218 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1219 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1220 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1221 | if (constant->value() == 0) { |
| 1222 | if (!dst.is(src)) { |
| 1223 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1224 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1225 | } else if (dst.is(src)) { |
| 1226 | ASSERT(!dst.is(kScratchRegister)); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1227 | if (constant->value() == Smi::kMinValue) { |
| 1228 | // Subtracting min-value from any non-negative value will overflow. |
| 1229 | // We test the non-negativeness before doing the subtraction. |
| 1230 | testq(src, src); |
| 1231 | j(not_sign, on_not_smi_result); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1232 | LoadSmiConstant(kScratchRegister, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1233 | subq(dst, kScratchRegister); |
| 1234 | } else { |
| 1235 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1236 | LoadSmiConstant(kScratchRegister, Smi::FromInt(-constant->value())); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1237 | addq(kScratchRegister, dst); |
| 1238 | j(overflow, on_not_smi_result); |
| 1239 | movq(dst, kScratchRegister); |
| 1240 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1241 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1242 | if (constant->value() == Smi::kMinValue) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1243 | // Subtracting min-value from any non-negative value will overflow. |
| 1244 | // We test the non-negativeness before doing the subtraction. |
| 1245 | testq(src, src); |
| 1246 | j(not_sign, on_not_smi_result); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1247 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1248 | // Adding and subtracting the min-value gives the same result, it only |
| 1249 | // differs on the overflow bit, which we don't check here. |
| 1250 | addq(dst, src); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1251 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1252 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1253 | LoadSmiConstant(dst, Smi::FromInt(-(constant->value()))); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1254 | addq(dst, src); |
| 1255 | j(overflow, on_not_smi_result); |
| 1256 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | |
| 1261 | void MacroAssembler::SmiDiv(Register dst, |
| 1262 | Register src1, |
| 1263 | Register src2, |
| 1264 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1265 | ASSERT(!src1.is(kScratchRegister)); |
| 1266 | ASSERT(!src2.is(kScratchRegister)); |
| 1267 | ASSERT(!dst.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1268 | ASSERT(!src2.is(rax)); |
| 1269 | ASSERT(!src2.is(rdx)); |
| 1270 | ASSERT(!src1.is(rdx)); |
| 1271 | |
| 1272 | // Check for 0 divisor (result is +/-Infinity). |
| 1273 | Label positive_divisor; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1274 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1275 | j(zero, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1276 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1277 | if (src1.is(rax)) { |
| 1278 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1279 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1280 | SmiToInteger32(rax, src1); |
| 1281 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 1282 | // overflow in idiv and raise an exception. |
| 1283 | // We combine this with negative zero test (negative zero only happens |
| 1284 | // when dividing zero by a negative number). |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1285 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1286 | // We overshoot a little and go to slow case if we divide min-value |
| 1287 | // by any negative value, not just -1. |
| 1288 | Label safe_div; |
| 1289 | testl(rax, Immediate(0x7fffffff)); |
| 1290 | j(not_zero, &safe_div); |
| 1291 | testq(src2, src2); |
| 1292 | if (src1.is(rax)) { |
| 1293 | j(positive, &safe_div); |
| 1294 | movq(src1, kScratchRegister); |
| 1295 | jmp(on_not_smi_result); |
| 1296 | } else { |
| 1297 | j(negative, on_not_smi_result); |
| 1298 | } |
| 1299 | bind(&safe_div); |
| 1300 | |
| 1301 | SmiToInteger32(src2, src2); |
| 1302 | // Sign extend src1 into edx:eax. |
| 1303 | cdq(); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1304 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1305 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1306 | // Check that the remainder is zero. |
| 1307 | testl(rdx, rdx); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1308 | if (src1.is(rax)) { |
| 1309 | Label smi_result; |
| 1310 | j(zero, &smi_result); |
| 1311 | movq(src1, kScratchRegister); |
| 1312 | jmp(on_not_smi_result); |
| 1313 | bind(&smi_result); |
| 1314 | } else { |
| 1315 | j(not_zero, on_not_smi_result); |
| 1316 | } |
| 1317 | if (!dst.is(src1) && src1.is(rax)) { |
| 1318 | movq(src1, kScratchRegister); |
| 1319 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1320 | Integer32ToSmi(dst, rax); |
| 1321 | } |
| 1322 | |
| 1323 | |
| 1324 | void MacroAssembler::SmiMod(Register dst, |
| 1325 | Register src1, |
| 1326 | Register src2, |
| 1327 | Label* on_not_smi_result) { |
| 1328 | ASSERT(!dst.is(kScratchRegister)); |
| 1329 | ASSERT(!src1.is(kScratchRegister)); |
| 1330 | ASSERT(!src2.is(kScratchRegister)); |
| 1331 | ASSERT(!src2.is(rax)); |
| 1332 | ASSERT(!src2.is(rdx)); |
| 1333 | ASSERT(!src1.is(rdx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1334 | ASSERT(!src1.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1335 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1336 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1337 | j(zero, on_not_smi_result); |
| 1338 | |
| 1339 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1340 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1341 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1342 | SmiToInteger32(rax, src1); |
| 1343 | SmiToInteger32(src2, src2); |
| 1344 | |
| 1345 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1346 | Label safe_div; |
| 1347 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1348 | j(not_equal, &safe_div); |
| 1349 | cmpl(src2, Immediate(-1)); |
| 1350 | j(not_equal, &safe_div); |
| 1351 | // Retag inputs and go slow case. |
| 1352 | Integer32ToSmi(src2, src2); |
| 1353 | if (src1.is(rax)) { |
| 1354 | movq(src1, kScratchRegister); |
| 1355 | } |
| 1356 | jmp(on_not_smi_result); |
| 1357 | bind(&safe_div); |
| 1358 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1359 | // Sign extend eax into edx:eax. |
| 1360 | cdq(); |
| 1361 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1362 | // Restore smi tags on inputs. |
| 1363 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1364 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1365 | movq(src1, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1366 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1367 | // Check for a negative zero result. If the result is zero, and the |
| 1368 | // dividend is negative, go slow to return a floating point negative zero. |
| 1369 | Label smi_result; |
| 1370 | testl(rdx, rdx); |
| 1371 | j(not_zero, &smi_result); |
| 1372 | testq(src1, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1373 | j(negative, on_not_smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1374 | bind(&smi_result); |
| 1375 | Integer32ToSmi(dst, rdx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | |
| 1379 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1380 | ASSERT(!dst.is(kScratchRegister)); |
| 1381 | ASSERT(!src.is(kScratchRegister)); |
| 1382 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1383 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1384 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1385 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1386 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1387 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1388 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1389 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1394 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1395 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1396 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1397 | } |
| 1398 | and_(dst, src2); |
| 1399 | } |
| 1400 | |
| 1401 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1402 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1403 | if (constant->value() == 0) { |
| 1404 | xor_(dst, dst); |
| 1405 | } else if (dst.is(src)) { |
| 1406 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1407 | Register constant_reg = GetSmiConstant(constant); |
| 1408 | and_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1409 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1410 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1411 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1412 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | |
| 1416 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1417 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1418 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1419 | } |
| 1420 | or_(dst, src2); |
| 1421 | } |
| 1422 | |
| 1423 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1424 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1425 | if (dst.is(src)) { |
| 1426 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1427 | Register constant_reg = GetSmiConstant(constant); |
| 1428 | or_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1429 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1430 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1431 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1432 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1433 | } |
| 1434 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1435 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1436 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1437 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1438 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1439 | } |
| 1440 | xor_(dst, src2); |
| 1441 | } |
| 1442 | |
| 1443 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1444 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1445 | if (dst.is(src)) { |
| 1446 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1447 | Register constant_reg = GetSmiConstant(constant); |
| 1448 | xor_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1449 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1450 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1451 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1452 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1456 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1457 | Register src, |
| 1458 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1459 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1460 | if (shift_value > 0) { |
| 1461 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1462 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1463 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1464 | } else { |
| 1465 | UNIMPLEMENTED(); // Not used. |
| 1466 | } |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | |
| 1471 | void MacroAssembler::SmiShiftLogicalRightConstant(Register dst, |
| 1472 | Register src, |
| 1473 | int shift_value, |
| 1474 | Label* on_not_smi_result) { |
| 1475 | // Logic right shift interprets its result as an *unsigned* number. |
| 1476 | if (dst.is(src)) { |
| 1477 | UNIMPLEMENTED(); // Not used. |
| 1478 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1479 | movq(dst, src); |
| 1480 | if (shift_value == 0) { |
| 1481 | testq(dst, dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1482 | j(negative, on_not_smi_result); |
| 1483 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1484 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1485 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1486 | } |
| 1487 | } |
| 1488 | |
| 1489 | |
| 1490 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1491 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1492 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1493 | if (!dst.is(src)) { |
| 1494 | movq(dst, src); |
| 1495 | } |
| 1496 | if (shift_value > 0) { |
| 1497 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | |
| 1502 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 1503 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1504 | Register src2) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1505 | ASSERT(!dst.is(rcx)); |
| 1506 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1507 | // Untag shift amount. |
| 1508 | if (!dst.is(src1)) { |
| 1509 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1510 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1511 | SmiToInteger32(rcx, src2); |
| 1512 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 1513 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1514 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1515 | } |
| 1516 | |
| 1517 | |
| 1518 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1519 | Register src1, |
| 1520 | Register src2, |
| 1521 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1522 | ASSERT(!dst.is(kScratchRegister)); |
| 1523 | ASSERT(!src1.is(kScratchRegister)); |
| 1524 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1525 | ASSERT(!dst.is(rcx)); |
| 1526 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1527 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1528 | movq(kScratchRegister, rcx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1529 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1530 | if (!dst.is(src1)) { |
| 1531 | movq(dst, src1); |
| 1532 | } |
| 1533 | SmiToInteger32(rcx, src2); |
| 1534 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1535 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1536 | shl(dst, Immediate(kSmiShift)); |
| 1537 | testq(dst, dst); |
| 1538 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1539 | Label positive_result; |
| 1540 | j(positive, &positive_result); |
| 1541 | if (src1.is(rcx)) { |
| 1542 | movq(src1, kScratchRegister); |
| 1543 | } else { |
| 1544 | movq(src2, kScratchRegister); |
| 1545 | } |
| 1546 | jmp(on_not_smi_result); |
| 1547 | bind(&positive_result); |
| 1548 | } else { |
| 1549 | j(negative, on_not_smi_result); // src2 was zero and src1 negative. |
| 1550 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1551 | } |
| 1552 | |
| 1553 | |
| 1554 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1555 | Register src1, |
| 1556 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1557 | ASSERT(!dst.is(kScratchRegister)); |
| 1558 | ASSERT(!src1.is(kScratchRegister)); |
| 1559 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1560 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1561 | if (src1.is(rcx)) { |
| 1562 | movq(kScratchRegister, src1); |
| 1563 | } else if (src2.is(rcx)) { |
| 1564 | movq(kScratchRegister, src2); |
| 1565 | } |
| 1566 | if (!dst.is(src1)) { |
| 1567 | movq(dst, src1); |
| 1568 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1569 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1570 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1571 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1572 | shl(dst, Immediate(kSmiShift)); |
| 1573 | if (src1.is(rcx)) { |
| 1574 | movq(src1, kScratchRegister); |
| 1575 | } else if (src2.is(rcx)) { |
| 1576 | movq(src2, kScratchRegister); |
| 1577 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1578 | } |
| 1579 | |
| 1580 | |
| 1581 | void MacroAssembler::SelectNonSmi(Register dst, |
| 1582 | Register src1, |
| 1583 | Register src2, |
| 1584 | Label* on_not_smis) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1585 | ASSERT(!dst.is(kScratchRegister)); |
| 1586 | ASSERT(!src1.is(kScratchRegister)); |
| 1587 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1588 | ASSERT(!dst.is(src1)); |
| 1589 | ASSERT(!dst.is(src2)); |
| 1590 | // Both operands must not be smis. |
| 1591 | #ifdef DEBUG |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1592 | if (allow_stub_calls()) { // Check contains a stub call. |
| 1593 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 1594 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 1595 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1596 | #endif |
| 1597 | ASSERT_EQ(0, kSmiTag); |
| 1598 | ASSERT_EQ(0, Smi::FromInt(0)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1599 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1600 | and_(kScratchRegister, src1); |
| 1601 | testl(kScratchRegister, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1602 | // If non-zero then both are smis. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1603 | j(not_zero, on_not_smis); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1604 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1605 | // Exactly one operand is a smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1606 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 1607 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 1608 | subq(kScratchRegister, Immediate(1)); |
| 1609 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 1610 | movq(dst, src1); |
| 1611 | xor_(dst, src2); |
| 1612 | and_(dst, kScratchRegister); |
| 1613 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 1614 | xor_(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1615 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1616 | } |
| 1617 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1618 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1619 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 1620 | Register src, |
| 1621 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1622 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1623 | // There is a possible optimization if shift is in the range 60-63, but that |
| 1624 | // will (and must) never happen. |
| 1625 | if (!dst.is(src)) { |
| 1626 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1627 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1628 | if (shift < kSmiShift) { |
| 1629 | sar(dst, Immediate(kSmiShift - shift)); |
| 1630 | } else { |
| 1631 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1632 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1633 | return SmiIndex(dst, times_1); |
| 1634 | } |
| 1635 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1636 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 1637 | Register src, |
| 1638 | int shift) { |
| 1639 | // Register src holds a positive smi. |
| 1640 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1641 | if (!dst.is(src)) { |
| 1642 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1643 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1644 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1645 | if (shift < kSmiShift) { |
| 1646 | sar(dst, Immediate(kSmiShift - shift)); |
| 1647 | } else { |
| 1648 | shl(dst, Immediate(shift - kSmiShift)); |
| 1649 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1650 | return SmiIndex(dst, times_1); |
| 1651 | } |
| 1652 | |
| 1653 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1654 | void MacroAssembler::JumpIfSmi(Register src, Label* on_smi) { |
| 1655 | ASSERT_EQ(0, kSmiTag); |
| 1656 | Condition smi = CheckSmi(src); |
| 1657 | j(smi, on_smi); |
| 1658 | } |
| 1659 | |
| 1660 | |
| 1661 | void MacroAssembler::JumpIfNotSmi(Register src, Label* on_not_smi) { |
| 1662 | Condition smi = CheckSmi(src); |
| 1663 | j(NegateCondition(smi), on_not_smi); |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | void MacroAssembler::JumpIfNotPositiveSmi(Register src, |
| 1668 | Label* on_not_positive_smi) { |
| 1669 | Condition positive_smi = CheckPositiveSmi(src); |
| 1670 | j(NegateCondition(positive_smi), on_not_positive_smi); |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1675 | Smi* constant, |
| 1676 | Label* on_equals) { |
| 1677 | SmiCompare(src, constant); |
| 1678 | j(equal, on_equals); |
| 1679 | } |
| 1680 | |
| 1681 | |
| 1682 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, Label* on_invalid) { |
| 1683 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1684 | j(NegateCondition(is_valid), on_invalid); |
| 1685 | } |
| 1686 | |
| 1687 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1688 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1689 | Label* on_invalid) { |
| 1690 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1691 | j(NegateCondition(is_valid), on_invalid); |
| 1692 | } |
| 1693 | |
| 1694 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1695 | void MacroAssembler::JumpIfNotBothSmi(Register src1, Register src2, |
| 1696 | Label* on_not_both_smi) { |
| 1697 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1698 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1699 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1700 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1701 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1702 | void MacroAssembler::JumpIfNotBothPositiveSmi(Register src1, Register src2, |
| 1703 | Label* on_not_both_smi) { |
| 1704 | Condition both_smi = CheckBothPositiveSmi(src1, src2); |
| 1705 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1706 | } |
| 1707 | |
| 1708 | |
| 1709 | |
| 1710 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| 1711 | Register second_object, |
| 1712 | Register scratch1, |
| 1713 | Register scratch2, |
| 1714 | Label* on_fail) { |
| 1715 | // Check that both objects are not smis. |
| 1716 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 1717 | j(either_smi, on_fail); |
| 1718 | |
| 1719 | // Load instance type for both strings. |
| 1720 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 1721 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 1722 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 1723 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 1724 | |
| 1725 | // Check that both are flat ascii strings. |
| 1726 | ASSERT(kNotStringTag != 0); |
| 1727 | const int kFlatAsciiStringMask = |
| 1728 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1729 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1730 | |
| 1731 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1732 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1733 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1734 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1735 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1736 | cmpl(scratch1, |
| 1737 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1738 | j(not_equal, on_fail); |
| 1739 | } |
| 1740 | |
| 1741 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1742 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 1743 | Register instance_type, |
| 1744 | Register scratch, |
| 1745 | Label *failure) { |
| 1746 | if (!scratch.is(instance_type)) { |
| 1747 | movl(scratch, instance_type); |
| 1748 | } |
| 1749 | |
| 1750 | const int kFlatAsciiStringMask = |
| 1751 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1752 | |
| 1753 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 1754 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 1755 | j(not_equal, failure); |
| 1756 | } |
| 1757 | |
| 1758 | |
| 1759 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 1760 | Register first_object_instance_type, |
| 1761 | Register second_object_instance_type, |
| 1762 | Register scratch1, |
| 1763 | Register scratch2, |
| 1764 | Label* on_fail) { |
| 1765 | // Load instance type for both strings. |
| 1766 | movq(scratch1, first_object_instance_type); |
| 1767 | movq(scratch2, second_object_instance_type); |
| 1768 | |
| 1769 | // Check that both are flat ascii strings. |
| 1770 | ASSERT(kNotStringTag != 0); |
| 1771 | const int kFlatAsciiStringMask = |
| 1772 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1773 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1774 | |
| 1775 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1776 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1777 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1778 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1779 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1780 | cmpl(scratch1, |
| 1781 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1782 | j(not_equal, on_fail); |
| 1783 | } |
| 1784 | |
| 1785 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1786 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1787 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1788 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1789 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1790 | } else { |
| 1791 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 1792 | } |
| 1793 | } |
| 1794 | |
| 1795 | |
| 1796 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1797 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1798 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1799 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1800 | } else { |
| 1801 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1802 | movq(dst, kScratchRegister); |
| 1803 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1804 | } |
| 1805 | |
| 1806 | |
| 1807 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1808 | if (source->IsSmi()) { |
| 1809 | SmiCompare(dst, Smi::cast(*source)); |
| 1810 | } else { |
| 1811 | Move(kScratchRegister, source); |
| 1812 | cmpq(dst, kScratchRegister); |
| 1813 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1814 | } |
| 1815 | |
| 1816 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1817 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1818 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1819 | SmiCompare(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1820 | } else { |
| 1821 | ASSERT(source->IsHeapObject()); |
| 1822 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1823 | cmpq(dst, kScratchRegister); |
| 1824 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1825 | } |
| 1826 | |
| 1827 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1828 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1829 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1830 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1831 | } else { |
| 1832 | ASSERT(source->IsHeapObject()); |
| 1833 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1834 | push(kScratchRegister); |
| 1835 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1836 | } |
| 1837 | |
| 1838 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1839 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1840 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 1841 | if (is_int32(smi)) { |
| 1842 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1843 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1844 | Register constant = GetSmiConstant(source); |
| 1845 | push(constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1846 | } |
| 1847 | } |
| 1848 | |
| 1849 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1850 | void MacroAssembler::Drop(int stack_elements) { |
| 1851 | if (stack_elements > 0) { |
| 1852 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1857 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1858 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1859 | } |
| 1860 | |
| 1861 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1862 | void MacroAssembler::Jump(ExternalReference ext) { |
| 1863 | movq(kScratchRegister, ext); |
| 1864 | jmp(kScratchRegister); |
| 1865 | } |
| 1866 | |
| 1867 | |
| 1868 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 1869 | movq(kScratchRegister, destination, rmode); |
| 1870 | jmp(kScratchRegister); |
| 1871 | } |
| 1872 | |
| 1873 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1874 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1875 | // TODO(X64): Inline this |
| 1876 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1877 | } |
| 1878 | |
| 1879 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1880 | void MacroAssembler::Call(ExternalReference ext) { |
| 1881 | movq(kScratchRegister, ext); |
| 1882 | call(kScratchRegister); |
| 1883 | } |
| 1884 | |
| 1885 | |
| 1886 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| 1887 | movq(kScratchRegister, destination, rmode); |
| 1888 | call(kScratchRegister); |
| 1889 | } |
| 1890 | |
| 1891 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1892 | void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1893 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1894 | WriteRecordedPositions(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1895 | call(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1896 | } |
| 1897 | |
| 1898 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1899 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 1900 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1901 | // Adjust this code if not the case. |
| 1902 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 1903 | |
| 1904 | // The pc (return address) is already on TOS. This code pushes state, |
| 1905 | // frame pointer and current handler. Check that they are expected |
| 1906 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1907 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 1908 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1909 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1910 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 1911 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1912 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 1913 | |
| 1914 | if (try_location == IN_JAVASCRIPT) { |
| 1915 | if (type == TRY_CATCH_HANDLER) { |
| 1916 | push(Immediate(StackHandler::TRY_CATCH)); |
| 1917 | } else { |
| 1918 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 1919 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1920 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1921 | } else { |
| 1922 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1923 | // The frame pointer does not point to a JS frame so we save NULL |
| 1924 | // for rbp. We expect the code throwing an exception to check rbp |
| 1925 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1926 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1927 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1928 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1929 | // Save the current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1930 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1931 | push(Operand(kScratchRegister, 0)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1932 | // Link this handler. |
| 1933 | movq(Operand(kScratchRegister, 0), rsp); |
| 1934 | } |
| 1935 | |
| 1936 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1937 | void MacroAssembler::PopTryHandler() { |
| 1938 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 1939 | // Unlink this handler. |
| 1940 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
| 1941 | pop(Operand(kScratchRegister, 0)); |
| 1942 | // Remove the remaining fields. |
| 1943 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 1944 | } |
| 1945 | |
| 1946 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1947 | void MacroAssembler::Ret() { |
| 1948 | ret(0); |
| 1949 | } |
| 1950 | |
| 1951 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1952 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1953 | fucomip(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 1954 | fstp(0); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1955 | } |
| 1956 | |
| 1957 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1958 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 1959 | InstanceType type, |
| 1960 | Register map) { |
| 1961 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1962 | CmpInstanceType(map, type); |
| 1963 | } |
| 1964 | |
| 1965 | |
| 1966 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 1967 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 1968 | Immediate(static_cast<int8_t>(type))); |
| 1969 | } |
| 1970 | |
| 1971 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1972 | void MacroAssembler::CheckMap(Register obj, |
| 1973 | Handle<Map> map, |
| 1974 | Label* fail, |
| 1975 | bool is_heap_object) { |
| 1976 | if (!is_heap_object) { |
| 1977 | JumpIfSmi(obj, fail); |
| 1978 | } |
| 1979 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 1980 | j(not_equal, fail); |
| 1981 | } |
| 1982 | |
| 1983 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1984 | void MacroAssembler::AbortIfNotNumber(Register object) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1985 | Label ok; |
| 1986 | Condition is_smi = CheckSmi(object); |
| 1987 | j(is_smi, &ok); |
| 1988 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 1989 | Factory::heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1990 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1991 | bind(&ok); |
| 1992 | } |
| 1993 | |
| 1994 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1995 | void MacroAssembler::AbortIfSmi(Register object) { |
| 1996 | Label ok; |
| 1997 | Condition is_smi = CheckSmi(object); |
| 1998 | Assert(NegateCondition(is_smi), "Operand is a smi"); |
| 1999 | } |
| 2000 | |
| 2001 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2002 | void MacroAssembler::AbortIfNotSmi(Register object) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2003 | Label ok; |
| 2004 | Condition is_smi = CheckSmi(object); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 2005 | Assert(is_smi, "Operand is not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 2006 | } |
| 2007 | |
| 2008 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 2009 | void MacroAssembler::AbortIfNotRootValue(Register src, |
| 2010 | Heap::RootListIndex root_value_index, |
| 2011 | const char* message) { |
| 2012 | ASSERT(!src.is(kScratchRegister)); |
| 2013 | LoadRoot(kScratchRegister, root_value_index); |
| 2014 | cmpq(src, kScratchRegister); |
| 2015 | Check(equal, message); |
| 2016 | } |
| 2017 | |
| 2018 | |
| 2019 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2020 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 2021 | Register map, |
| 2022 | Register instance_type) { |
| 2023 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 2024 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 2025 | ASSERT(kNotStringTag != 0); |
| 2026 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 2027 | return zero; |
| 2028 | } |
| 2029 | |
| 2030 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2031 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 2032 | Register result, |
| 2033 | Label* miss) { |
| 2034 | // Check that the receiver isn't a smi. |
| 2035 | testl(function, Immediate(kSmiTagMask)); |
| 2036 | j(zero, miss); |
| 2037 | |
| 2038 | // Check that the function really is a function. |
| 2039 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 2040 | j(not_equal, miss); |
| 2041 | |
| 2042 | // Make sure that the function has an instance prototype. |
| 2043 | Label non_instance; |
| 2044 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 2045 | Immediate(1 << Map::kHasNonInstancePrototype)); |
| 2046 | j(not_zero, &non_instance); |
| 2047 | |
| 2048 | // Get the prototype or initial map from the function. |
| 2049 | movq(result, |
| 2050 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 2051 | |
| 2052 | // If the prototype or initial map is the hole, don't return it and |
| 2053 | // simply miss the cache instead. This will allow us to allocate a |
| 2054 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2055 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2056 | j(equal, miss); |
| 2057 | |
| 2058 | // If the function does not have an initial map, we're done. |
| 2059 | Label done; |
| 2060 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| 2061 | j(not_equal, &done); |
| 2062 | |
| 2063 | // Get the prototype from the initial map. |
| 2064 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 2065 | jmp(&done); |
| 2066 | |
| 2067 | // Non-instance prototype: Fetch prototype from constructor field |
| 2068 | // in initial map. |
| 2069 | bind(&non_instance); |
| 2070 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 2071 | |
| 2072 | // All done. |
| 2073 | bind(&done); |
| 2074 | } |
| 2075 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2076 | |
| 2077 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 2078 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2079 | movq(kScratchRegister, ExternalReference(counter)); |
| 2080 | movl(Operand(kScratchRegister, 0), Immediate(value)); |
| 2081 | } |
| 2082 | } |
| 2083 | |
| 2084 | |
| 2085 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 2086 | ASSERT(value > 0); |
| 2087 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2088 | movq(kScratchRegister, ExternalReference(counter)); |
| 2089 | Operand operand(kScratchRegister, 0); |
| 2090 | if (value == 1) { |
| 2091 | incl(operand); |
| 2092 | } else { |
| 2093 | addl(operand, Immediate(value)); |
| 2094 | } |
| 2095 | } |
| 2096 | } |
| 2097 | |
| 2098 | |
| 2099 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 2100 | ASSERT(value > 0); |
| 2101 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 2102 | movq(kScratchRegister, ExternalReference(counter)); |
| 2103 | Operand operand(kScratchRegister, 0); |
| 2104 | if (value == 1) { |
| 2105 | decl(operand); |
| 2106 | } else { |
| 2107 | subl(operand, Immediate(value)); |
| 2108 | } |
| 2109 | } |
| 2110 | } |
| 2111 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2112 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2113 | |
| 2114 | void MacroAssembler::PushRegistersFromMemory(RegList regs) { |
| 2115 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 2116 | // Push the content of the memory location to the stack. |
| 2117 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 2118 | int r = JSCallerSavedCode(i); |
| 2119 | if ((regs & (1 << r)) != 0) { |
| 2120 | ExternalReference reg_addr = |
| 2121 | ExternalReference(Debug_Address::Register(i)); |
| 2122 | movq(kScratchRegister, reg_addr); |
| 2123 | push(Operand(kScratchRegister, 0)); |
| 2124 | } |
| 2125 | } |
| 2126 | } |
| 2127 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2128 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2129 | void MacroAssembler::SaveRegistersToMemory(RegList regs) { |
| 2130 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 2131 | // Copy the content of registers to memory location. |
| 2132 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 2133 | int r = JSCallerSavedCode(i); |
| 2134 | if ((regs & (1 << r)) != 0) { |
| 2135 | Register reg = { r }; |
| 2136 | ExternalReference reg_addr = |
| 2137 | ExternalReference(Debug_Address::Register(i)); |
| 2138 | movq(kScratchRegister, reg_addr); |
| 2139 | movq(Operand(kScratchRegister, 0), reg); |
| 2140 | } |
| 2141 | } |
| 2142 | } |
| 2143 | |
| 2144 | |
| 2145 | void MacroAssembler::RestoreRegistersFromMemory(RegList regs) { |
| 2146 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 2147 | // Copy the content of memory location to registers. |
| 2148 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 2149 | int r = JSCallerSavedCode(i); |
| 2150 | if ((regs & (1 << r)) != 0) { |
| 2151 | Register reg = { r }; |
| 2152 | ExternalReference reg_addr = |
| 2153 | ExternalReference(Debug_Address::Register(i)); |
| 2154 | movq(kScratchRegister, reg_addr); |
| 2155 | movq(reg, Operand(kScratchRegister, 0)); |
| 2156 | } |
| 2157 | } |
| 2158 | } |
| 2159 | |
| 2160 | |
| 2161 | void MacroAssembler::PopRegistersToMemory(RegList regs) { |
| 2162 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 2163 | // Pop the content from the stack to the memory location. |
| 2164 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 2165 | int r = JSCallerSavedCode(i); |
| 2166 | if ((regs & (1 << r)) != 0) { |
| 2167 | ExternalReference reg_addr = |
| 2168 | ExternalReference(Debug_Address::Register(i)); |
| 2169 | movq(kScratchRegister, reg_addr); |
| 2170 | pop(Operand(kScratchRegister, 0)); |
| 2171 | } |
| 2172 | } |
| 2173 | } |
| 2174 | |
| 2175 | |
| 2176 | void MacroAssembler::CopyRegistersFromStackToMemory(Register base, |
| 2177 | Register scratch, |
| 2178 | RegList regs) { |
| 2179 | ASSERT(!scratch.is(kScratchRegister)); |
| 2180 | ASSERT(!base.is(kScratchRegister)); |
| 2181 | ASSERT(!base.is(scratch)); |
| 2182 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 2183 | // Copy the content of the stack to the memory location and adjust base. |
| 2184 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 2185 | int r = JSCallerSavedCode(i); |
| 2186 | if ((regs & (1 << r)) != 0) { |
| 2187 | movq(scratch, Operand(base, 0)); |
| 2188 | ExternalReference reg_addr = |
| 2189 | ExternalReference(Debug_Address::Register(i)); |
| 2190 | movq(kScratchRegister, reg_addr); |
| 2191 | movq(Operand(kScratchRegister, 0), scratch); |
| 2192 | lea(base, Operand(base, kPointerSize)); |
| 2193 | } |
| 2194 | } |
| 2195 | } |
| 2196 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2197 | void MacroAssembler::DebugBreak() { |
| 2198 | ASSERT(allow_stub_calls()); |
| 2199 | xor_(rax, rax); // no arguments |
| 2200 | movq(rbx, ExternalReference(Runtime::kDebugBreak)); |
| 2201 | CEntryStub ces(1); |
| 2202 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2203 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2204 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2205 | |
| 2206 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2207 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 2208 | const ParameterCount& actual, |
| 2209 | Handle<Code> code_constant, |
| 2210 | Register code_register, |
| 2211 | Label* done, |
| 2212 | InvokeFlag flag) { |
| 2213 | bool definitely_matches = false; |
| 2214 | Label invoke; |
| 2215 | if (expected.is_immediate()) { |
| 2216 | ASSERT(actual.is_immediate()); |
| 2217 | if (expected.immediate() == actual.immediate()) { |
| 2218 | definitely_matches = true; |
| 2219 | } else { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 2220 | Set(rax, actual.immediate()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2221 | if (expected.immediate() == |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2222 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2223 | // Don't worry about adapting arguments for built-ins that |
| 2224 | // don't want that done. Skip adaption code by making it look |
| 2225 | // like we have a match between expected and actual number of |
| 2226 | // arguments. |
| 2227 | definitely_matches = true; |
| 2228 | } else { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 2229 | Set(rbx, expected.immediate()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2230 | } |
| 2231 | } |
| 2232 | } else { |
| 2233 | if (actual.is_immediate()) { |
| 2234 | // Expected is in register, actual is immediate. This is the |
| 2235 | // case when we invoke function values without going through the |
| 2236 | // IC mechanism. |
| 2237 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 2238 | j(equal, &invoke); |
| 2239 | ASSERT(expected.reg().is(rbx)); |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 2240 | Set(rax, actual.immediate()); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2241 | } else if (!expected.reg().is(actual.reg())) { |
| 2242 | // Both expected and actual are in (different) registers. This |
| 2243 | // is the case when we invoke functions using call and apply. |
| 2244 | cmpq(expected.reg(), actual.reg()); |
| 2245 | j(equal, &invoke); |
| 2246 | ASSERT(actual.reg().is(rax)); |
| 2247 | ASSERT(expected.reg().is(rbx)); |
| 2248 | } |
| 2249 | } |
| 2250 | |
| 2251 | if (!definitely_matches) { |
| 2252 | Handle<Code> adaptor = |
| 2253 | Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 2254 | if (!code_constant.is_null()) { |
| 2255 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 2256 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 2257 | } else if (!code_register.is(rdx)) { |
| 2258 | movq(rdx, code_register); |
| 2259 | } |
| 2260 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2261 | if (flag == CALL_FUNCTION) { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 2262 | Call(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2263 | jmp(done); |
| 2264 | } else { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 2265 | Jump(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2266 | } |
| 2267 | bind(&invoke); |
| 2268 | } |
| 2269 | } |
| 2270 | |
| 2271 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2272 | void MacroAssembler::InvokeCode(Register code, |
| 2273 | const ParameterCount& expected, |
| 2274 | const ParameterCount& actual, |
| 2275 | InvokeFlag flag) { |
| 2276 | Label done; |
| 2277 | InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| 2278 | if (flag == CALL_FUNCTION) { |
| 2279 | call(code); |
| 2280 | } else { |
| 2281 | ASSERT(flag == JUMP_FUNCTION); |
| 2282 | jmp(code); |
| 2283 | } |
| 2284 | bind(&done); |
| 2285 | } |
| 2286 | |
| 2287 | |
| 2288 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 2289 | const ParameterCount& expected, |
| 2290 | const ParameterCount& actual, |
| 2291 | RelocInfo::Mode rmode, |
| 2292 | InvokeFlag flag) { |
| 2293 | Label done; |
| 2294 | Register dummy = rax; |
| 2295 | InvokePrologue(expected, actual, code, dummy, &done, flag); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2296 | if (flag == CALL_FUNCTION) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2297 | Call(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2298 | } else { |
| 2299 | ASSERT(flag == JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2300 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2301 | } |
| 2302 | bind(&done); |
| 2303 | } |
| 2304 | |
| 2305 | |
| 2306 | void MacroAssembler::InvokeFunction(Register function, |
| 2307 | const ParameterCount& actual, |
| 2308 | InvokeFlag flag) { |
| 2309 | ASSERT(function.is(rdi)); |
| 2310 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 2311 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 2312 | movsxlq(rbx, |
| 2313 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
vegorov@chromium.org | 26c16f8 | 2010-08-11 13:41:03 +0000 | [diff] [blame] | 2314 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 2315 | // 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] | 2316 | // the executable code. |
| 2317 | lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 2318 | |
| 2319 | ParameterCount expected(rbx); |
| 2320 | InvokeCode(rdx, expected, actual, flag); |
| 2321 | } |
| 2322 | |
| 2323 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2324 | void MacroAssembler::InvokeFunction(JSFunction* function, |
| 2325 | const ParameterCount& actual, |
| 2326 | InvokeFlag flag) { |
| 2327 | ASSERT(function->is_compiled()); |
| 2328 | // Get the function and setup the context. |
| 2329 | Move(rdi, Handle<JSFunction>(function)); |
| 2330 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 2331 | |
| 2332 | // Invoke the cached code. |
| 2333 | Handle<Code> code(function->code()); |
| 2334 | ParameterCount expected(function->shared()->formal_parameter_count()); |
| 2335 | InvokeCode(code, expected, actual, RelocInfo::CODE_TARGET, flag); |
| 2336 | } |
| 2337 | |
| 2338 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2339 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 2340 | push(rbp); |
| 2341 | movq(rbp, rsp); |
| 2342 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2343 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2344 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 2345 | push(kScratchRegister); |
| 2346 | if (FLAG_debug_code) { |
| 2347 | movq(kScratchRegister, |
| 2348 | Factory::undefined_value(), |
| 2349 | RelocInfo::EMBEDDED_OBJECT); |
| 2350 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 2351 | Check(not_equal, "code object not properly patched"); |
| 2352 | } |
| 2353 | } |
| 2354 | |
| 2355 | |
| 2356 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 2357 | if (FLAG_debug_code) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2358 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2359 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 2360 | Check(equal, "stack frame types must match"); |
| 2361 | } |
| 2362 | movq(rsp, rbp); |
| 2363 | pop(rbp); |
| 2364 | } |
| 2365 | |
| 2366 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2367 | void MacroAssembler::EnterExitFramePrologue(ExitFrame::Mode mode, |
| 2368 | bool save_rax) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2369 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2370 | // 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] | 2371 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 2372 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 2373 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 2374 | push(rbp); |
| 2375 | movq(rbp, rsp); |
| 2376 | |
| 2377 | // Reserve room for entry stack pointer and push the debug marker. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2378 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2379 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 2380 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 2381 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2382 | |
| 2383 | // Save the frame pointer and the context in top. |
| 2384 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 2385 | ExternalReference context_address(Top::k_context_address); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2386 | if (save_rax) { |
| 2387 | movq(r14, rax); // Backup rax before we use it. |
| 2388 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2389 | |
| 2390 | movq(rax, rbp); |
| 2391 | store_rax(c_entry_fp_address); |
| 2392 | movq(rax, rsi); |
| 2393 | store_rax(context_address); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2394 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2395 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2396 | void MacroAssembler::EnterExitFrameEpilogue(ExitFrame::Mode mode, |
| 2397 | int result_size, |
| 2398 | int argc) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2399 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2400 | // Save the state of all registers to the stack from the memory |
| 2401 | // location. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2402 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2403 | // TODO(1243899): This should be symmetric to |
| 2404 | // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
| 2405 | // correct here, but computed for the other call. Very error |
| 2406 | // prone! FIX THIS. Actually there are deeper problems with |
| 2407 | // register saving than this asymmetry (see the bug report |
| 2408 | // associated with this issue). |
| 2409 | PushRegistersFromMemory(kJSCallerSaved); |
| 2410 | } |
| 2411 | #endif |
| 2412 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2413 | #ifdef _WIN64 |
| 2414 | // Reserve space on stack for result and argument structures, if necessary. |
| 2415 | int result_stack_space = (result_size < 2) ? 0 : result_size * kPointerSize; |
| 2416 | // Reserve space for the Arguments object. The Windows 64-bit ABI |
| 2417 | // requires us to pass this structure as a pointer to its location on |
| 2418 | // the stack. The structure contains 2 values. |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2419 | int argument_stack_space = argc * kPointerSize; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2420 | // We also need backing space for 4 parameters, even though |
| 2421 | // we only pass one or two parameter, and it is in a register. |
| 2422 | int argument_mirror_space = 4 * kPointerSize; |
| 2423 | int total_stack_space = |
| 2424 | argument_mirror_space + argument_stack_space + result_stack_space; |
| 2425 | subq(rsp, Immediate(total_stack_space)); |
| 2426 | #endif |
| 2427 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2428 | // Get the required frame alignment for the OS. |
| 2429 | static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| 2430 | if (kFrameAlignment > 0) { |
| 2431 | ASSERT(IsPowerOf2(kFrameAlignment)); |
| 2432 | movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| 2433 | and_(rsp, kScratchRegister); |
| 2434 | } |
| 2435 | |
| 2436 | // Patch the saved entry sp. |
| 2437 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 2438 | } |
| 2439 | |
| 2440 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 2441 | void MacroAssembler::EnterExitFrame(ExitFrame::Mode mode, int result_size) { |
| 2442 | EnterExitFramePrologue(mode, true); |
| 2443 | |
| 2444 | // Setup argv in callee-saved register r12. It is reused in LeaveExitFrame, |
| 2445 | // so it must be retained across the C-call. |
| 2446 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| 2447 | lea(r12, Operand(rbp, r14, times_pointer_size, offset)); |
| 2448 | |
| 2449 | EnterExitFrameEpilogue(mode, result_size, 2); |
| 2450 | } |
| 2451 | |
| 2452 | |
| 2453 | void MacroAssembler::EnterApiExitFrame(ExitFrame::Mode mode, |
| 2454 | int stack_space, |
| 2455 | int argc, |
| 2456 | int result_size) { |
| 2457 | EnterExitFramePrologue(mode, false); |
| 2458 | |
| 2459 | // Setup argv in callee-saved register r12. It is reused in LeaveExitFrame, |
| 2460 | // so it must be retained across the C-call. |
| 2461 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| 2462 | lea(r12, Operand(rbp, (stack_space * kPointerSize) + offset)); |
| 2463 | |
| 2464 | EnterExitFrameEpilogue(mode, result_size, argc); |
| 2465 | } |
| 2466 | |
| 2467 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2468 | void MacroAssembler::LeaveExitFrame(ExitFrame::Mode mode, int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2469 | // Registers: |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 2470 | // r12 : argv |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2471 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2472 | // Restore the memory copy of the registers by digging them out from |
| 2473 | // the stack. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2474 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2475 | // It's okay to clobber register rbx below because we don't need |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2476 | // the function pointer after this. |
| 2477 | const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2478 | int kOffset = ExitFrameConstants::kCodeOffset - kCallerSavedSize; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2479 | lea(rbx, Operand(rbp, kOffset)); |
| 2480 | CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved); |
| 2481 | } |
| 2482 | #endif |
| 2483 | |
| 2484 | // Get the return address from the stack and restore the frame pointer. |
| 2485 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 2486 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 2487 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2488 | // Pop everything up to and including the arguments and the receiver |
| 2489 | // from the caller stack. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 2490 | lea(rsp, Operand(r12, 1 * kPointerSize)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2491 | |
| 2492 | // Restore current context from top and clear it in debug mode. |
| 2493 | ExternalReference context_address(Top::k_context_address); |
| 2494 | movq(kScratchRegister, context_address); |
| 2495 | movq(rsi, Operand(kScratchRegister, 0)); |
| 2496 | #ifdef DEBUG |
| 2497 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2498 | #endif |
| 2499 | |
| 2500 | // Push the return address to get ready to return. |
| 2501 | push(rcx); |
| 2502 | |
| 2503 | // Clear the top frame. |
| 2504 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 2505 | movq(kScratchRegister, c_entry_fp_address); |
| 2506 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2507 | } |
| 2508 | |
| 2509 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2510 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 2511 | Register scratch, |
| 2512 | Label* miss) { |
| 2513 | Label same_contexts; |
| 2514 | |
| 2515 | ASSERT(!holder_reg.is(scratch)); |
| 2516 | ASSERT(!scratch.is(kScratchRegister)); |
| 2517 | // Load current lexical context from the stack frame. |
| 2518 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 2519 | |
| 2520 | // When generating debug code, make sure the lexical context is set. |
| 2521 | if (FLAG_debug_code) { |
| 2522 | cmpq(scratch, Immediate(0)); |
| 2523 | Check(not_equal, "we should not have an empty lexical context"); |
| 2524 | } |
| 2525 | // Load the global context of the current context. |
| 2526 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 2527 | movq(scratch, FieldOperand(scratch, offset)); |
| 2528 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 2529 | |
| 2530 | // Check the context is a global context. |
| 2531 | if (FLAG_debug_code) { |
| 2532 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
| 2533 | Factory::global_context_map()); |
| 2534 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2535 | } |
| 2536 | |
| 2537 | // Check if both contexts are the same. |
| 2538 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 2539 | j(equal, &same_contexts); |
| 2540 | |
| 2541 | // Compare security tokens. |
| 2542 | // Check that the security token in the calling global object is |
| 2543 | // compatible with the security token in the receiving global |
| 2544 | // object. |
| 2545 | |
| 2546 | // Check the context is a global context. |
| 2547 | if (FLAG_debug_code) { |
| 2548 | // Preserve original value of holder_reg. |
| 2549 | push(holder_reg); |
| 2550 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2551 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2552 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 2553 | |
| 2554 | // Read the first word and compare to global_context_map(), |
| 2555 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2556 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2557 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2558 | pop(holder_reg); |
| 2559 | } |
| 2560 | |
| 2561 | movq(kScratchRegister, |
| 2562 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2563 | int token_offset = |
| 2564 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2565 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 2566 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 2567 | j(not_equal, miss); |
| 2568 | |
| 2569 | bind(&same_contexts); |
| 2570 | } |
| 2571 | |
| 2572 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2573 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
| 2574 | Register result_end, |
| 2575 | Register scratch, |
| 2576 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2577 | ExternalReference new_space_allocation_top = |
| 2578 | ExternalReference::new_space_allocation_top_address(); |
| 2579 | |
| 2580 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2581 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2582 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2583 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2584 | #ifdef DEBUG |
| 2585 | // Assert that result actually contains top on entry. |
| 2586 | movq(kScratchRegister, new_space_allocation_top); |
| 2587 | cmpq(result, Operand(kScratchRegister, 0)); |
| 2588 | Check(equal, "Unexpected allocation top"); |
| 2589 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2590 | return; |
| 2591 | } |
| 2592 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2593 | // Move address of new object to result. Use scratch register if available, |
| 2594 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 2595 | if (scratch.is_valid()) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2596 | ASSERT(!scratch.is(result_end)); |
| 2597 | movq(scratch, new_space_allocation_top); |
| 2598 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2599 | } else if (result.is(rax)) { |
| 2600 | load_rax(new_space_allocation_top); |
| 2601 | } else { |
| 2602 | movq(kScratchRegister, new_space_allocation_top); |
| 2603 | movq(result, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2604 | } |
| 2605 | } |
| 2606 | |
| 2607 | |
| 2608 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 2609 | Register scratch) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2610 | if (FLAG_debug_code) { |
| 2611 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 2612 | Check(zero, "Unaligned allocation in new space"); |
| 2613 | } |
| 2614 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2615 | ExternalReference new_space_allocation_top = |
| 2616 | ExternalReference::new_space_allocation_top_address(); |
| 2617 | |
| 2618 | // Update new top. |
| 2619 | if (result_end.is(rax)) { |
| 2620 | // rax can be stored directly to a memory location. |
| 2621 | store_rax(new_space_allocation_top); |
| 2622 | } else { |
| 2623 | // Register required - use scratch provided if available. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2624 | if (scratch.is_valid()) { |
| 2625 | movq(Operand(scratch, 0), result_end); |
| 2626 | } else { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2627 | movq(kScratchRegister, new_space_allocation_top); |
| 2628 | movq(Operand(kScratchRegister, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2629 | } |
| 2630 | } |
| 2631 | } |
| 2632 | |
| 2633 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2634 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 2635 | Register result, |
| 2636 | Register result_end, |
| 2637 | Register scratch, |
| 2638 | Label* gc_required, |
| 2639 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2640 | ASSERT(!result.is(result_end)); |
| 2641 | |
| 2642 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2643 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2644 | |
| 2645 | // Calculate new top and bail out if new space is exhausted. |
| 2646 | ExternalReference new_space_allocation_limit = |
| 2647 | ExternalReference::new_space_allocation_limit_address(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2648 | |
| 2649 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 2650 | |
| 2651 | if (top_reg.is(result)) { |
| 2652 | addq(top_reg, Immediate(object_size)); |
| 2653 | } else { |
| 2654 | lea(top_reg, Operand(result, object_size)); |
| 2655 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2656 | movq(kScratchRegister, new_space_allocation_limit); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2657 | cmpq(top_reg, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2658 | j(above, gc_required); |
| 2659 | |
| 2660 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2661 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2662 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2663 | if (top_reg.is(result)) { |
| 2664 | if ((flags & TAG_OBJECT) != 0) { |
| 2665 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 2666 | } else { |
| 2667 | subq(result, Immediate(object_size)); |
| 2668 | } |
| 2669 | } else if ((flags & TAG_OBJECT) != 0) { |
| 2670 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2671 | addq(result, Immediate(kHeapObjectTag)); |
| 2672 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2673 | } |
| 2674 | |
| 2675 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2676 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 2677 | ScaleFactor element_size, |
| 2678 | Register element_count, |
| 2679 | Register result, |
| 2680 | Register result_end, |
| 2681 | Register scratch, |
| 2682 | Label* gc_required, |
| 2683 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2684 | ASSERT(!result.is(result_end)); |
| 2685 | |
| 2686 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2687 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2688 | |
| 2689 | // Calculate new top and bail out if new space is exhausted. |
| 2690 | ExternalReference new_space_allocation_limit = |
| 2691 | ExternalReference::new_space_allocation_limit_address(); |
| 2692 | lea(result_end, Operand(result, element_count, element_size, header_size)); |
| 2693 | movq(kScratchRegister, new_space_allocation_limit); |
| 2694 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2695 | j(above, gc_required); |
| 2696 | |
| 2697 | // Update allocation top. |
| 2698 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2699 | |
| 2700 | // Tag the result if requested. |
| 2701 | if ((flags & TAG_OBJECT) != 0) { |
| 2702 | addq(result, Immediate(kHeapObjectTag)); |
| 2703 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2704 | } |
| 2705 | |
| 2706 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2707 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 2708 | Register result, |
| 2709 | Register result_end, |
| 2710 | Register scratch, |
| 2711 | Label* gc_required, |
| 2712 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2713 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2714 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2715 | |
| 2716 | // Calculate new top and bail out if new space is exhausted. |
| 2717 | ExternalReference new_space_allocation_limit = |
| 2718 | ExternalReference::new_space_allocation_limit_address(); |
| 2719 | if (!object_size.is(result_end)) { |
| 2720 | movq(result_end, object_size); |
| 2721 | } |
| 2722 | addq(result_end, result); |
| 2723 | movq(kScratchRegister, new_space_allocation_limit); |
| 2724 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2725 | j(above, gc_required); |
| 2726 | |
| 2727 | // Update allocation top. |
| 2728 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2729 | |
| 2730 | // Tag the result if requested. |
| 2731 | if ((flags & TAG_OBJECT) != 0) { |
| 2732 | addq(result, Immediate(kHeapObjectTag)); |
| 2733 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2734 | } |
| 2735 | |
| 2736 | |
| 2737 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 2738 | ExternalReference new_space_allocation_top = |
| 2739 | ExternalReference::new_space_allocation_top_address(); |
| 2740 | |
| 2741 | // Make sure the object has no tag before resetting top. |
| 2742 | and_(object, Immediate(~kHeapObjectTagMask)); |
| 2743 | movq(kScratchRegister, new_space_allocation_top); |
| 2744 | #ifdef DEBUG |
| 2745 | cmpq(object, Operand(kScratchRegister, 0)); |
| 2746 | Check(below, "Undo allocation of non allocated memory"); |
| 2747 | #endif |
| 2748 | movq(Operand(kScratchRegister, 0), object); |
| 2749 | } |
| 2750 | |
| 2751 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2752 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 2753 | Register scratch, |
| 2754 | Label* gc_required) { |
| 2755 | // Allocate heap number in new space. |
| 2756 | AllocateInNewSpace(HeapNumber::kSize, |
| 2757 | result, |
| 2758 | scratch, |
| 2759 | no_reg, |
| 2760 | gc_required, |
| 2761 | TAG_OBJECT); |
| 2762 | |
| 2763 | // Set the map. |
| 2764 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 2765 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2766 | } |
| 2767 | |
| 2768 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2769 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 2770 | Register length, |
| 2771 | Register scratch1, |
| 2772 | Register scratch2, |
| 2773 | Register scratch3, |
| 2774 | Label* gc_required) { |
| 2775 | // Calculate the number of bytes needed for the characters in the string while |
| 2776 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2777 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 2778 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2779 | ASSERT(kShortSize == 2); |
| 2780 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2781 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 2782 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2783 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2784 | if (kHeaderAlignment > 0) { |
| 2785 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2786 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2787 | |
| 2788 | // Allocate two byte string in new space. |
| 2789 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 2790 | times_1, |
| 2791 | scratch1, |
| 2792 | result, |
| 2793 | scratch2, |
| 2794 | scratch3, |
| 2795 | gc_required, |
| 2796 | TAG_OBJECT); |
| 2797 | |
| 2798 | // Set the map, length and hash field. |
| 2799 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 2800 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2801 | Integer32ToSmi(scratch1, length); |
| 2802 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2803 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2804 | Immediate(String::kEmptyHashField)); |
| 2805 | } |
| 2806 | |
| 2807 | |
| 2808 | void MacroAssembler::AllocateAsciiString(Register result, |
| 2809 | Register length, |
| 2810 | Register scratch1, |
| 2811 | Register scratch2, |
| 2812 | Register scratch3, |
| 2813 | Label* gc_required) { |
| 2814 | // Calculate the number of bytes needed for the characters in the string while |
| 2815 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2816 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 2817 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2818 | movl(scratch1, length); |
| 2819 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2820 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2821 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2822 | if (kHeaderAlignment > 0) { |
| 2823 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2824 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2825 | |
| 2826 | // Allocate ascii string in new space. |
| 2827 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 2828 | times_1, |
| 2829 | scratch1, |
| 2830 | result, |
| 2831 | scratch2, |
| 2832 | scratch3, |
| 2833 | gc_required, |
| 2834 | TAG_OBJECT); |
| 2835 | |
| 2836 | // Set the map, length and hash field. |
| 2837 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 2838 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2839 | Integer32ToSmi(scratch1, length); |
| 2840 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2841 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2842 | Immediate(String::kEmptyHashField)); |
| 2843 | } |
| 2844 | |
| 2845 | |
| 2846 | void MacroAssembler::AllocateConsString(Register result, |
| 2847 | Register scratch1, |
| 2848 | Register scratch2, |
| 2849 | Label* gc_required) { |
| 2850 | // Allocate heap number in new space. |
| 2851 | AllocateInNewSpace(ConsString::kSize, |
| 2852 | result, |
| 2853 | scratch1, |
| 2854 | scratch2, |
| 2855 | gc_required, |
| 2856 | TAG_OBJECT); |
| 2857 | |
| 2858 | // Set the map. The other fields are left uninitialized. |
| 2859 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 2860 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2861 | } |
| 2862 | |
| 2863 | |
| 2864 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 2865 | Register scratch1, |
| 2866 | Register scratch2, |
| 2867 | Label* gc_required) { |
| 2868 | // Allocate heap number in new space. |
| 2869 | AllocateInNewSpace(ConsString::kSize, |
| 2870 | result, |
| 2871 | scratch1, |
| 2872 | scratch2, |
| 2873 | gc_required, |
| 2874 | TAG_OBJECT); |
| 2875 | |
| 2876 | // Set the map. The other fields are left uninitialized. |
| 2877 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 2878 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2879 | } |
| 2880 | |
| 2881 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2882 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2883 | if (context_chain_length > 0) { |
| 2884 | // Move up the chain of contexts to the context containing the slot. |
| 2885 | movq(dst, Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2886 | // Load the function context (which is the incoming, outer context). |
lrn@chromium.org | d5649e3 | 2010-01-19 13:36:12 +0000 | [diff] [blame] | 2887 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2888 | for (int i = 1; i < context_chain_length; i++) { |
| 2889 | movq(dst, Operand(dst, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2890 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
| 2891 | } |
| 2892 | // The context may be an intermediate context, not a function context. |
| 2893 | movq(dst, Operand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2894 | } else { // context is the current function context. |
| 2895 | // The context may be an intermediate context, not a function context. |
| 2896 | movq(dst, Operand(rsi, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2897 | } |
| 2898 | } |
| 2899 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2900 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2901 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2902 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 2903 | // including the ones passed in registers, and space is always allocated for |
| 2904 | // the four register arguments even if the function takes fewer than four |
| 2905 | // arguments. |
| 2906 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 2907 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2908 | ASSERT(num_arguments >= 0); |
| 2909 | #ifdef _WIN64 |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2910 | static const int kMinimumStackSlots = 4; |
| 2911 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 2912 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2913 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2914 | static const int kRegisterPassedArguments = 6; |
| 2915 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 2916 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2917 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2918 | } |
| 2919 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2920 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2921 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 2922 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 2923 | ASSERT(frame_alignment != 0); |
| 2924 | ASSERT(num_arguments >= 0); |
| 2925 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 2926 | movq(kScratchRegister, rsp); |
| 2927 | ASSERT(IsPowerOf2(frame_alignment)); |
| 2928 | int argument_slots_on_stack = |
| 2929 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2930 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 2931 | and_(rsp, Immediate(-frame_alignment)); |
| 2932 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 2933 | } |
| 2934 | |
| 2935 | |
| 2936 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 2937 | int num_arguments) { |
| 2938 | movq(rax, function); |
| 2939 | CallCFunction(rax, num_arguments); |
| 2940 | } |
| 2941 | |
| 2942 | |
| 2943 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2944 | // Check stack alignment. |
| 2945 | if (FLAG_debug_code) { |
| 2946 | CheckStackAlignment(); |
| 2947 | } |
| 2948 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2949 | call(function); |
| 2950 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 2951 | ASSERT(num_arguments >= 0); |
| 2952 | int argument_slots_on_stack = |
| 2953 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2954 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 2955 | } |
| 2956 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2957 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2958 | CodePatcher::CodePatcher(byte* address, int size) |
| 2959 | : address_(address), size_(size), masm_(address, size + Assembler::kGap) { |
| 2960 | // Create a new macro assembler pointing to the address of the code to patch. |
| 2961 | // The size is adjusted with kGap on order for the assembler to generate size |
| 2962 | // bytes of instructions without failing with buffer size constraints. |
| 2963 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2964 | } |
| 2965 | |
| 2966 | |
| 2967 | CodePatcher::~CodePatcher() { |
| 2968 | // Indicate that code has changed. |
| 2969 | CPU::FlushICache(address_, size_); |
| 2970 | |
| 2971 | // Check that the code was patched as expected. |
| 2972 | ASSERT(masm_.pc_ == address_ + size_); |
| 2973 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2974 | } |
| 2975 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2976 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2977 | |
| 2978 | #endif // V8_TARGET_ARCH_X64 |