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" |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 38 | |
| 39 | namespace v8 { |
| 40 | namespace internal { |
| 41 | |
| 42 | MacroAssembler::MacroAssembler(void* buffer, int size) |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 43 | : Assembler(buffer, size), |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 44 | generating_stub_(false), |
| 45 | allow_stub_calls_(true), |
| 46 | code_object_(Heap::undefined_value()) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 47 | } |
| 48 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 49 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 50 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 51 | movq(destination, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 55 | void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) { |
| 56 | movq(Operand(kRootRegister, index << kPointerSizeLog2), source); |
| 57 | } |
| 58 | |
| 59 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 60 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 61 | push(Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 65 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 66 | cmpq(with, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 67 | } |
| 68 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 69 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 70 | void MacroAssembler::CompareRoot(Operand with, Heap::RootListIndex index) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 71 | LoadRoot(kScratchRegister, index); |
| 72 | cmpq(with, kScratchRegister); |
| 73 | } |
| 74 | |
| 75 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 76 | void MacroAssembler::StackLimitCheck(Label* on_stack_overflow) { |
| 77 | CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| 78 | j(below, on_stack_overflow); |
| 79 | } |
| 80 | |
| 81 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 82 | void MacroAssembler::RecordWriteHelper(Register object, |
| 83 | Register addr, |
| 84 | Register scratch) { |
| 85 | if (FLAG_debug_code) { |
| 86 | // Check that the object is not in new space. |
| 87 | Label not_in_new_space; |
| 88 | InNewSpace(object, scratch, not_equal, ¬_in_new_space); |
| 89 | Abort("new-space object passed to RecordWriteHelper"); |
| 90 | bind(¬_in_new_space); |
| 91 | } |
| 92 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 93 | // Compute the page start address from the heap object pointer, and reuse |
| 94 | // the 'object' register for it. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 95 | and_(object, Immediate(~Page::kPageAlignmentMask)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 96 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 97 | // Compute number of region covering addr. See Page::GetRegionNumberForAddress |
| 98 | // method for more details. |
| 99 | and_(addr, Immediate(Page::kPageAlignmentMask)); |
| 100 | shrl(addr, Immediate(Page::kRegionSizeLog2)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 101 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 102 | // Set dirty mark for region. |
| 103 | bts(Operand(object, Page::kDirtyFlagOffset), addr); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 107 | // For page containing |object| mark region covering [object+offset] dirty. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 108 | // object is the object being stored into, value is the object being stored. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 109 | // If offset is zero, then the smi_index register contains the array index into |
| 110 | // the elements array represented as a smi. Otherwise it can be used as a |
| 111 | // scratch register. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 112 | // All registers are clobbered by the operation. |
| 113 | void MacroAssembler::RecordWrite(Register object, |
| 114 | int offset, |
| 115 | Register value, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 116 | Register smi_index) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 117 | // The compiled code assumes that record write doesn't change the |
| 118 | // context register, so we check that none of the clobbered |
| 119 | // registers are rsi. |
| 120 | ASSERT(!object.is(rsi) && !value.is(rsi) && !smi_index.is(rsi)); |
| 121 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 122 | // First, check if a write barrier is even needed. The tests below |
| 123 | // catch stores of Smis and stores into young gen. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 124 | Label done; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 125 | JumpIfSmi(value, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 126 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 127 | RecordWriteNonSmi(object, offset, value, smi_index); |
| 128 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 129 | |
| 130 | // Clobber all input registers when running with the debug-code flag |
| 131 | // turned on to provoke errors. This clobbering repeats the |
| 132 | // clobbering done inside RecordWriteNonSmi but it's necessary to |
| 133 | // avoid having the fast case for smis leave the registers |
| 134 | // unchanged. |
| 135 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 136 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 137 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 138 | movq(smi_index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 139 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | |
| 143 | void MacroAssembler::RecordWriteNonSmi(Register object, |
| 144 | int offset, |
| 145 | Register scratch, |
| 146 | Register smi_index) { |
| 147 | Label done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 148 | |
| 149 | if (FLAG_debug_code) { |
| 150 | Label okay; |
| 151 | JumpIfNotSmi(object, &okay); |
| 152 | Abort("MacroAssembler::RecordWriteNonSmi cannot deal with smis"); |
| 153 | bind(&okay); |
| 154 | } |
| 155 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 156 | // Test that the object address is not in the new space. We cannot |
| 157 | // update page dirty marks for new space pages. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 158 | InNewSpace(object, scratch, equal, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 159 | |
whesse@chromium.org | e88a9ed | 2010-04-15 15:07:46 +0000 | [diff] [blame] | 160 | // The offset is relative to a tagged or untagged HeapObject pointer, |
| 161 | // so either offset or offset + kHeapObjectTag must be a |
| 162 | // multiple of kPointerSize. |
| 163 | ASSERT(IsAligned(offset, kPointerSize) || |
| 164 | IsAligned(offset + kHeapObjectTag, kPointerSize)); |
| 165 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 166 | Register dst = smi_index; |
| 167 | if (offset != 0) { |
| 168 | lea(dst, Operand(object, offset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 169 | } else { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 170 | // array access: calculate the destination address in the same manner as |
| 171 | // KeyedStoreIC::GenerateGeneric. |
| 172 | SmiIndex index = SmiToIndex(smi_index, smi_index, kPointerSizeLog2); |
| 173 | lea(dst, FieldOperand(object, |
| 174 | index.reg, |
| 175 | index.scale, |
| 176 | FixedArray::kHeaderSize)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 177 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 178 | RecordWriteHelper(object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 179 | |
| 180 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 181 | |
| 182 | // Clobber all input registers when running with the debug-code flag |
| 183 | // turned on to provoke errors. |
| 184 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 185 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 186 | movq(scratch, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 187 | movq(smi_index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 188 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 189 | } |
| 190 | |
| 191 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 192 | void MacroAssembler::InNewSpace(Register object, |
| 193 | Register scratch, |
| 194 | Condition cc, |
| 195 | Label* branch) { |
| 196 | if (Serializer::enabled()) { |
| 197 | // Can't do arithmetic on external references if it might get serialized. |
| 198 | // The mask isn't really an address. We load it as an external reference in |
| 199 | // case the size of the new space is different between the snapshot maker |
| 200 | // and the running system. |
| 201 | if (scratch.is(object)) { |
| 202 | movq(kScratchRegister, ExternalReference::new_space_mask()); |
| 203 | and_(scratch, kScratchRegister); |
| 204 | } else { |
| 205 | movq(scratch, ExternalReference::new_space_mask()); |
| 206 | and_(scratch, object); |
| 207 | } |
| 208 | movq(kScratchRegister, ExternalReference::new_space_start()); |
| 209 | cmpq(scratch, kScratchRegister); |
| 210 | j(cc, branch); |
| 211 | } else { |
| 212 | ASSERT(is_int32(static_cast<int64_t>(Heap::NewSpaceMask()))); |
| 213 | intptr_t new_space_start = |
| 214 | reinterpret_cast<intptr_t>(Heap::NewSpaceStart()); |
| 215 | movq(kScratchRegister, -new_space_start, RelocInfo::NONE); |
| 216 | if (scratch.is(object)) { |
| 217 | addq(scratch, kScratchRegister); |
| 218 | } else { |
| 219 | lea(scratch, Operand(object, kScratchRegister, times_1, 0)); |
| 220 | } |
| 221 | and_(scratch, Immediate(static_cast<int32_t>(Heap::NewSpaceMask()))); |
| 222 | j(cc, branch); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 227 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
| 228 | if (FLAG_debug_code) Check(cc, msg); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | void MacroAssembler::Check(Condition cc, const char* msg) { |
| 233 | Label L; |
| 234 | j(cc, &L); |
| 235 | Abort(msg); |
| 236 | // will not return here |
| 237 | bind(&L); |
| 238 | } |
| 239 | |
| 240 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 241 | void MacroAssembler::CheckStackAlignment() { |
| 242 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 243 | int frame_alignment_mask = frame_alignment - 1; |
| 244 | if (frame_alignment > kPointerSize) { |
| 245 | ASSERT(IsPowerOf2(frame_alignment)); |
| 246 | Label alignment_as_expected; |
| 247 | testq(rsp, Immediate(frame_alignment_mask)); |
| 248 | j(zero, &alignment_as_expected); |
| 249 | // Abort if stack is not aligned. |
| 250 | int3(); |
| 251 | bind(&alignment_as_expected); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 256 | void MacroAssembler::NegativeZeroTest(Register result, |
| 257 | Register op, |
| 258 | Label* then_label) { |
| 259 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 260 | testl(result, result); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 261 | j(not_zero, &ok); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 262 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 263 | j(sign, then_label); |
| 264 | bind(&ok); |
| 265 | } |
| 266 | |
| 267 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 268 | void MacroAssembler::Abort(const char* msg) { |
| 269 | // We want to pass the msg string like a smi to avoid GC |
| 270 | // problems, however msg is not guaranteed to be aligned |
| 271 | // properly. Instead, we pass an aligned pointer that is |
| 272 | // a proper v8 smi, but also pass the alignment difference |
| 273 | // from the real pointer as a smi. |
| 274 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 275 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 276 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 277 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 278 | #ifdef DEBUG |
| 279 | if (msg != NULL) { |
| 280 | RecordComment("Abort message: "); |
| 281 | RecordComment(msg); |
| 282 | } |
| 283 | #endif |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 284 | // Disable stub call restrictions to always allow calls to abort. |
| 285 | set_allow_stub_calls(true); |
| 286 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 287 | push(rax); |
| 288 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 289 | push(kScratchRegister); |
| 290 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 291 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 292 | RelocInfo::NONE); |
| 293 | push(kScratchRegister); |
| 294 | CallRuntime(Runtime::kAbort, 2); |
| 295 | // will not return here |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 296 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | |
| 300 | void MacroAssembler::CallStub(CodeStub* stub) { |
| 301 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 302 | Call(stub->GetCode(), RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 303 | } |
| 304 | |
| 305 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 306 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
| 307 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
| 308 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 309 | } |
| 310 | |
| 311 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 312 | void MacroAssembler::StubReturn(int argc) { |
| 313 | ASSERT(argc >= 1 && generating_stub()); |
| 314 | ret((argc - 1) * kPointerSize); |
| 315 | } |
| 316 | |
| 317 | |
| 318 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 319 | if (num_arguments > 0) { |
| 320 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 321 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 322 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | |
| 326 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 327 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 328 | } |
| 329 | |
| 330 | |
| 331 | void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| 332 | // If the expected number of arguments of the runtime function is |
| 333 | // constant, we check that the actual number of arguments match the |
| 334 | // expectation. |
| 335 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 336 | IllegalOperation(num_arguments); |
| 337 | return; |
| 338 | } |
| 339 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 340 | // TODO(1236192): Most runtime routines don't need the number of |
| 341 | // arguments passed in because it is constant. At some point we |
| 342 | // should remove this need and make the runtime routine entry code |
| 343 | // smarter. |
| 344 | movq(rax, Immediate(num_arguments)); |
| 345 | movq(rbx, ExternalReference(f)); |
| 346 | CEntryStub ces(f->result_size); |
| 347 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 351 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 352 | int num_arguments) { |
| 353 | movq(rax, Immediate(num_arguments)); |
| 354 | movq(rbx, ext); |
| 355 | |
| 356 | CEntryStub stub(1); |
| 357 | CallStub(&stub); |
| 358 | } |
| 359 | |
| 360 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 361 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 362 | int num_arguments, |
| 363 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 364 | // ----------- S t a t e ------------- |
| 365 | // -- rsp[0] : return address |
| 366 | // -- rsp[8] : argument num_arguments - 1 |
| 367 | // ... |
| 368 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 369 | // ----------------------------------- |
| 370 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 371 | // TODO(1236192): Most runtime routines don't need the number of |
| 372 | // arguments passed in because it is constant. At some point we |
| 373 | // should remove this need and make the runtime routine entry code |
| 374 | // smarter. |
| 375 | movq(rax, Immediate(num_arguments)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 376 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 380 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 381 | int num_arguments, |
| 382 | int result_size) { |
| 383 | TailCallExternalReference(ExternalReference(fid), num_arguments, result_size); |
| 384 | } |
| 385 | |
| 386 | |
| 387 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 388 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 389 | // Set the entry point and jump to the C entry runtime stub. |
| 390 | movq(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 391 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 392 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 393 | } |
| 394 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 395 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 396 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| 397 | // Calls are not allowed in some stubs. |
| 398 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 399 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 400 | // Rely on the assertion to check that the number of provided |
| 401 | // arguments match the expected number of arguments. Fake a |
| 402 | // parameter count to avoid emitting code to do the check. |
| 403 | ParameterCount expected(0); |
| 404 | GetBuiltinEntry(rdx, id); |
| 405 | InvokeCode(rdx, expected, expected, flag); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 406 | } |
| 407 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 408 | |
| 409 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 410 | ASSERT(!target.is(rdi)); |
| 411 | |
| 412 | // Load the builtins object into target register. |
| 413 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 414 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
| 415 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 416 | // Load the JavaScript builtin function from the builtins object. |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 417 | movq(rdi, FieldOperand(target, JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 418 | |
| 419 | // Load the code entry point from the builtins object. |
| 420 | movq(target, FieldOperand(target, JSBuiltinsObject::OffsetOfCodeWithId(id))); |
| 421 | if (FLAG_debug_code) { |
| 422 | // Make sure the code objects in the builtins object and in the |
| 423 | // builtin function are the same. |
| 424 | push(target); |
| 425 | movq(target, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset)); |
| 426 | movq(target, FieldOperand(target, SharedFunctionInfo::kCodeOffset)); |
| 427 | cmpq(target, Operand(rsp, 0)); |
| 428 | Assert(equal, "Builtin code object changed"); |
| 429 | pop(target); |
| 430 | } |
| 431 | lea(target, FieldOperand(target, Code::kHeaderSize)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 432 | } |
| 433 | |
| 434 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 435 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 436 | if (x == 0) { |
| 437 | xor_(dst, dst); |
| 438 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 439 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 440 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 441 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 442 | } else { |
| 443 | movq(dst, x, RelocInfo::NONE); |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | |
| 448 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 449 | if (x == 0) { |
| 450 | xor_(kScratchRegister, kScratchRegister); |
| 451 | movq(dst, kScratchRegister); |
| 452 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 453 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 454 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 455 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 456 | } else { |
| 457 | movq(kScratchRegister, x, RelocInfo::NONE); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 458 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 459 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 460 | } |
| 461 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 462 | // ---------------------------------------------------------------------------- |
| 463 | // Smi tagging, untagging and tag detection. |
| 464 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 465 | static int kSmiShift = kSmiTagSize + kSmiShiftSize; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 466 | |
| 467 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 468 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 469 | if (!dst.is(src)) { |
| 470 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 471 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 472 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | |
| 476 | void MacroAssembler::Integer32ToSmi(Register dst, |
| 477 | Register src, |
| 478 | Label* on_overflow) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 479 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 480 | // 32-bit integer always fits in a long smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 481 | if (!dst.is(src)) { |
| 482 | movl(dst, src); |
| 483 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 484 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 488 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 489 | Register src, |
| 490 | int constant) { |
| 491 | if (dst.is(src)) { |
| 492 | addq(dst, Immediate(constant)); |
| 493 | } else { |
| 494 | lea(dst, Operand(src, constant)); |
| 495 | } |
| 496 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | |
| 500 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 501 | ASSERT_EQ(0, kSmiTag); |
| 502 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 503 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 504 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 505 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 509 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 510 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 511 | } |
| 512 | |
| 513 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 514 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 515 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 516 | if (!dst.is(src)) { |
| 517 | movq(dst, src); |
| 518 | } |
| 519 | sar(dst, Immediate(kSmiShift)); |
| 520 | } |
| 521 | |
| 522 | |
| 523 | void MacroAssembler::SmiTest(Register src) { |
| 524 | testq(src, src); |
| 525 | } |
| 526 | |
| 527 | |
| 528 | void MacroAssembler::SmiCompare(Register dst, Register src) { |
| 529 | cmpq(dst, src); |
| 530 | } |
| 531 | |
| 532 | |
| 533 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
| 534 | ASSERT(!dst.is(kScratchRegister)); |
| 535 | if (src->value() == 0) { |
| 536 | testq(dst, dst); |
| 537 | } else { |
| 538 | Move(kScratchRegister, src); |
| 539 | cmpq(dst, kScratchRegister); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 544 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 545 | cmpq(dst, src); |
| 546 | } |
| 547 | |
| 548 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 549 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
| 550 | cmpq(dst, src); |
| 551 | } |
| 552 | |
| 553 | |
| 554 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 555 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 556 | } |
| 557 | |
| 558 | |
| 559 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 560 | Register src, |
| 561 | int power) { |
| 562 | ASSERT(power >= 0); |
| 563 | ASSERT(power < 64); |
| 564 | if (power == 0) { |
| 565 | SmiToInteger64(dst, src); |
| 566 | return; |
| 567 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 568 | if (!dst.is(src)) { |
| 569 | movq(dst, src); |
| 570 | } |
| 571 | if (power < kSmiShift) { |
| 572 | sar(dst, Immediate(kSmiShift - power)); |
| 573 | } else if (power > kSmiShift) { |
| 574 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 575 | } |
| 576 | } |
| 577 | |
| 578 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 579 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 580 | Register src, |
| 581 | int power) { |
| 582 | ASSERT((0 <= power) && (power < 32)); |
| 583 | if (dst.is(src)) { |
| 584 | shr(dst, Immediate(power + kSmiShift)); |
| 585 | } else { |
| 586 | UNIMPLEMENTED(); // Not used. |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 591 | Condition MacroAssembler::CheckSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 592 | ASSERT_EQ(0, kSmiTag); |
| 593 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 594 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 595 | } |
| 596 | |
| 597 | |
| 598 | Condition MacroAssembler::CheckPositiveSmi(Register src) { |
| 599 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 600 | movq(kScratchRegister, src); |
| 601 | rol(kScratchRegister, Immediate(1)); |
| 602 | testl(kScratchRegister, Immediate(0x03)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 603 | return zero; |
| 604 | } |
| 605 | |
| 606 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 607 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 608 | if (first.is(second)) { |
| 609 | return CheckSmi(first); |
| 610 | } |
| 611 | movl(kScratchRegister, first); |
| 612 | orl(kScratchRegister, second); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 613 | testb(kScratchRegister, Immediate(kSmiTagMask)); |
| 614 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 618 | Condition MacroAssembler::CheckBothPositiveSmi(Register first, |
| 619 | Register second) { |
| 620 | if (first.is(second)) { |
| 621 | return CheckPositiveSmi(first); |
| 622 | } |
| 623 | movl(kScratchRegister, first); |
| 624 | orl(kScratchRegister, second); |
| 625 | rol(kScratchRegister, Immediate(1)); |
| 626 | testl(kScratchRegister, Immediate(0x03)); |
| 627 | return zero; |
| 628 | } |
| 629 | |
| 630 | |
| 631 | |
| 632 | Condition MacroAssembler::CheckEitherSmi(Register first, Register second) { |
| 633 | if (first.is(second)) { |
| 634 | return CheckSmi(first); |
| 635 | } |
| 636 | movl(kScratchRegister, first); |
| 637 | andl(kScratchRegister, second); |
| 638 | testb(kScratchRegister, Immediate(kSmiTagMask)); |
| 639 | return zero; |
| 640 | } |
| 641 | |
| 642 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 643 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
| 644 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 645 | movq(kScratchRegister, src); |
| 646 | rol(kScratchRegister, Immediate(1)); |
| 647 | cmpq(kScratchRegister, Immediate(1)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 648 | return equal; |
| 649 | } |
| 650 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 651 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 652 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 653 | // A 32-bit integer value can always be converted to a smi. |
| 654 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 658 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 659 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 660 | // is not set. |
| 661 | testq(src, Immediate(0x80000000)); |
| 662 | return zero; |
| 663 | } |
| 664 | |
| 665 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 666 | void MacroAssembler::SmiNeg(Register dst, Register src, Label* on_smi_result) { |
| 667 | if (dst.is(src)) { |
| 668 | ASSERT(!dst.is(kScratchRegister)); |
| 669 | movq(kScratchRegister, src); |
| 670 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 671 | // Test if result is zero or Smi::kMinValue. |
| 672 | cmpq(dst, kScratchRegister); |
| 673 | j(not_equal, on_smi_result); |
| 674 | movq(src, kScratchRegister); |
| 675 | } else { |
| 676 | movq(dst, src); |
| 677 | neg(dst); |
| 678 | cmpq(dst, src); |
| 679 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 680 | j(not_equal, on_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 681 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | |
| 685 | void MacroAssembler::SmiAdd(Register dst, |
| 686 | Register src1, |
| 687 | Register src2, |
| 688 | Label* on_not_smi_result) { |
| 689 | ASSERT(!dst.is(src2)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 690 | if (on_not_smi_result == NULL) { |
| 691 | // No overflow checking. Use only when it's known that |
| 692 | // overflowing is impossible. |
| 693 | if (dst.is(src1)) { |
| 694 | addq(dst, src2); |
| 695 | } else { |
| 696 | movq(dst, src1); |
| 697 | addq(dst, src2); |
| 698 | } |
| 699 | Assert(no_overflow, "Smi addition onverflow"); |
| 700 | } else if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 701 | addq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 702 | Label smi_result; |
| 703 | j(no_overflow, &smi_result); |
| 704 | // Restore src1. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 705 | subq(src1, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 706 | jmp(on_not_smi_result); |
| 707 | bind(&smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 708 | } else { |
| 709 | movq(dst, src1); |
| 710 | addq(dst, src2); |
| 711 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 712 | } |
| 713 | } |
| 714 | |
| 715 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 716 | void MacroAssembler::SmiSub(Register dst, |
| 717 | Register src1, |
| 718 | Register src2, |
| 719 | Label* on_not_smi_result) { |
| 720 | ASSERT(!dst.is(src2)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 721 | if (on_not_smi_result == NULL) { |
| 722 | // No overflow checking. Use only when it's known that |
| 723 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 724 | if (dst.is(src1)) { |
| 725 | subq(dst, src2); |
| 726 | } else { |
| 727 | movq(dst, src1); |
| 728 | subq(dst, src2); |
| 729 | } |
| 730 | Assert(no_overflow, "Smi substraction onverflow"); |
| 731 | } else if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 732 | subq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 733 | Label smi_result; |
| 734 | j(no_overflow, &smi_result); |
| 735 | // Restore src1. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 736 | addq(src1, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 737 | jmp(on_not_smi_result); |
| 738 | bind(&smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 739 | } else { |
| 740 | movq(dst, src1); |
| 741 | subq(dst, src2); |
| 742 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 743 | } |
| 744 | } |
| 745 | |
| 746 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 747 | void MacroAssembler::SmiSub(Register dst, |
| 748 | Register src1, |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 749 | const Operand& src2, |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 750 | Label* on_not_smi_result) { |
| 751 | if (on_not_smi_result == NULL) { |
| 752 | // No overflow checking. Use only when it's known that |
| 753 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 754 | if (dst.is(src1)) { |
| 755 | subq(dst, src2); |
| 756 | } else { |
| 757 | movq(dst, src1); |
| 758 | subq(dst, src2); |
| 759 | } |
| 760 | Assert(no_overflow, "Smi substraction onverflow"); |
| 761 | } else if (dst.is(src1)) { |
| 762 | subq(dst, src2); |
| 763 | Label smi_result; |
| 764 | j(no_overflow, &smi_result); |
| 765 | // Restore src1. |
| 766 | addq(src1, src2); |
| 767 | jmp(on_not_smi_result); |
| 768 | bind(&smi_result); |
| 769 | } else { |
| 770 | movq(dst, src1); |
| 771 | subq(dst, src2); |
| 772 | j(overflow, on_not_smi_result); |
| 773 | } |
| 774 | } |
| 775 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 776 | void MacroAssembler::SmiMul(Register dst, |
| 777 | Register src1, |
| 778 | Register src2, |
| 779 | Label* on_not_smi_result) { |
| 780 | ASSERT(!dst.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 781 | ASSERT(!dst.is(kScratchRegister)); |
| 782 | ASSERT(!src1.is(kScratchRegister)); |
| 783 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 784 | |
| 785 | if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 786 | Label failure, zero_correct_result; |
| 787 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 788 | SmiToInteger64(dst, src1); |
| 789 | imul(dst, src2); |
| 790 | j(overflow, &failure); |
| 791 | |
| 792 | // Check for negative zero result. If product is zero, and one |
| 793 | // argument is negative, go to slow case. |
| 794 | Label correct_result; |
| 795 | testq(dst, dst); |
| 796 | j(not_zero, &correct_result); |
| 797 | |
| 798 | movq(dst, kScratchRegister); |
| 799 | xor_(dst, src2); |
| 800 | j(positive, &zero_correct_result); // Result was positive zero. |
| 801 | |
| 802 | bind(&failure); // Reused failure exit, restores src1. |
| 803 | movq(src1, kScratchRegister); |
| 804 | jmp(on_not_smi_result); |
| 805 | |
| 806 | bind(&zero_correct_result); |
| 807 | xor_(dst, dst); |
| 808 | |
| 809 | bind(&correct_result); |
| 810 | } else { |
| 811 | SmiToInteger64(dst, src1); |
| 812 | imul(dst, src2); |
| 813 | j(overflow, on_not_smi_result); |
| 814 | // Check for negative zero result. If product is zero, and one |
| 815 | // argument is negative, go to slow case. |
| 816 | Label correct_result; |
| 817 | testq(dst, dst); |
| 818 | j(not_zero, &correct_result); |
| 819 | // One of src1 and src2 is zero, the check whether the other is |
| 820 | // negative. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 821 | movq(kScratchRegister, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 822 | xor_(kScratchRegister, src2); |
| 823 | j(negative, on_not_smi_result); |
| 824 | bind(&correct_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 825 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | |
| 829 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 830 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 831 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 832 | Label* on_not_smi_result) { |
| 833 | // Does not assume that src is a smi. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 834 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 835 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 836 | ASSERT(!dst.is(kScratchRegister)); |
| 837 | ASSERT(!src.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 838 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 839 | JumpIfNotSmi(src, on_not_smi_result); |
| 840 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 841 | Move(tmp, constant); |
| 842 | addq(tmp, src); |
| 843 | j(overflow, on_not_smi_result); |
| 844 | if (dst.is(src)) { |
| 845 | movq(dst, tmp); |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | |
| 850 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 851 | if (constant->value() == 0) { |
| 852 | if (!dst.is(src)) { |
| 853 | movq(dst, src); |
| 854 | } |
| 855 | } else if (dst.is(src)) { |
| 856 | ASSERT(!dst.is(kScratchRegister)); |
| 857 | |
| 858 | Move(kScratchRegister, constant); |
| 859 | addq(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 860 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 861 | Move(dst, constant); |
| 862 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 863 | } |
| 864 | } |
| 865 | |
| 866 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 867 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 868 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 869 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 870 | } |
| 871 | } |
| 872 | |
| 873 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 874 | void MacroAssembler::SmiAddConstant(Register dst, |
| 875 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 876 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 877 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 878 | if (constant->value() == 0) { |
| 879 | if (!dst.is(src)) { |
| 880 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 881 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 882 | } else if (dst.is(src)) { |
| 883 | ASSERT(!dst.is(kScratchRegister)); |
| 884 | |
| 885 | Move(kScratchRegister, constant); |
| 886 | addq(dst, kScratchRegister); |
| 887 | Label result_ok; |
| 888 | j(no_overflow, &result_ok); |
| 889 | subq(dst, kScratchRegister); |
| 890 | jmp(on_not_smi_result); |
| 891 | bind(&result_ok); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 892 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 893 | Move(dst, constant); |
| 894 | addq(dst, src); |
| 895 | j(overflow, on_not_smi_result); |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | |
| 900 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 901 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 902 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 903 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 904 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 905 | } else if (dst.is(src)) { |
| 906 | ASSERT(!dst.is(kScratchRegister)); |
| 907 | |
| 908 | Move(kScratchRegister, constant); |
| 909 | subq(dst, kScratchRegister); |
| 910 | } else { |
| 911 | // Subtract by adding the negative, to do it in two operations. |
| 912 | if (constant->value() == Smi::kMinValue) { |
| 913 | Move(kScratchRegister, constant); |
| 914 | movq(dst, src); |
| 915 | subq(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 916 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 917 | Move(dst, Smi::FromInt(-constant->value())); |
| 918 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 919 | } |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | |
| 924 | void MacroAssembler::SmiSubConstant(Register dst, |
| 925 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 926 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 927 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 928 | if (constant->value() == 0) { |
| 929 | if (!dst.is(src)) { |
| 930 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 931 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 932 | } else if (dst.is(src)) { |
| 933 | ASSERT(!dst.is(kScratchRegister)); |
| 934 | |
| 935 | Move(kScratchRegister, constant); |
| 936 | subq(dst, kScratchRegister); |
| 937 | Label sub_success; |
| 938 | j(no_overflow, &sub_success); |
| 939 | addq(src, kScratchRegister); |
| 940 | jmp(on_not_smi_result); |
| 941 | bind(&sub_success); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 942 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 943 | if (constant->value() == Smi::kMinValue) { |
| 944 | Move(kScratchRegister, constant); |
| 945 | movq(dst, src); |
| 946 | subq(dst, kScratchRegister); |
| 947 | j(overflow, on_not_smi_result); |
| 948 | } else { |
| 949 | Move(dst, Smi::FromInt(-(constant->value()))); |
| 950 | addq(dst, src); |
| 951 | j(overflow, on_not_smi_result); |
| 952 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 953 | } |
| 954 | } |
| 955 | |
| 956 | |
| 957 | void MacroAssembler::SmiDiv(Register dst, |
| 958 | Register src1, |
| 959 | Register src2, |
| 960 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 961 | ASSERT(!src1.is(kScratchRegister)); |
| 962 | ASSERT(!src2.is(kScratchRegister)); |
| 963 | ASSERT(!dst.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 964 | ASSERT(!src2.is(rax)); |
| 965 | ASSERT(!src2.is(rdx)); |
| 966 | ASSERT(!src1.is(rdx)); |
| 967 | |
| 968 | // Check for 0 divisor (result is +/-Infinity). |
| 969 | Label positive_divisor; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 970 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 971 | j(zero, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 972 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 973 | if (src1.is(rax)) { |
| 974 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 975 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 976 | SmiToInteger32(rax, src1); |
| 977 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 978 | // overflow in idiv and raise an exception. |
| 979 | // We combine this with negative zero test (negative zero only happens |
| 980 | // when dividing zero by a negative number). |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 981 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 982 | // We overshoot a little and go to slow case if we divide min-value |
| 983 | // by any negative value, not just -1. |
| 984 | Label safe_div; |
| 985 | testl(rax, Immediate(0x7fffffff)); |
| 986 | j(not_zero, &safe_div); |
| 987 | testq(src2, src2); |
| 988 | if (src1.is(rax)) { |
| 989 | j(positive, &safe_div); |
| 990 | movq(src1, kScratchRegister); |
| 991 | jmp(on_not_smi_result); |
| 992 | } else { |
| 993 | j(negative, on_not_smi_result); |
| 994 | } |
| 995 | bind(&safe_div); |
| 996 | |
| 997 | SmiToInteger32(src2, src2); |
| 998 | // Sign extend src1 into edx:eax. |
| 999 | cdq(); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1000 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1001 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1002 | // Check that the remainder is zero. |
| 1003 | testl(rdx, rdx); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1004 | if (src1.is(rax)) { |
| 1005 | Label smi_result; |
| 1006 | j(zero, &smi_result); |
| 1007 | movq(src1, kScratchRegister); |
| 1008 | jmp(on_not_smi_result); |
| 1009 | bind(&smi_result); |
| 1010 | } else { |
| 1011 | j(not_zero, on_not_smi_result); |
| 1012 | } |
| 1013 | if (!dst.is(src1) && src1.is(rax)) { |
| 1014 | movq(src1, kScratchRegister); |
| 1015 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1016 | Integer32ToSmi(dst, rax); |
| 1017 | } |
| 1018 | |
| 1019 | |
| 1020 | void MacroAssembler::SmiMod(Register dst, |
| 1021 | Register src1, |
| 1022 | Register src2, |
| 1023 | Label* on_not_smi_result) { |
| 1024 | ASSERT(!dst.is(kScratchRegister)); |
| 1025 | ASSERT(!src1.is(kScratchRegister)); |
| 1026 | ASSERT(!src2.is(kScratchRegister)); |
| 1027 | ASSERT(!src2.is(rax)); |
| 1028 | ASSERT(!src2.is(rdx)); |
| 1029 | ASSERT(!src1.is(rdx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1030 | ASSERT(!src1.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1031 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1032 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1033 | j(zero, on_not_smi_result); |
| 1034 | |
| 1035 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1036 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1037 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1038 | SmiToInteger32(rax, src1); |
| 1039 | SmiToInteger32(src2, src2); |
| 1040 | |
| 1041 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 1042 | Label safe_div; |
| 1043 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1044 | j(not_equal, &safe_div); |
| 1045 | cmpl(src2, Immediate(-1)); |
| 1046 | j(not_equal, &safe_div); |
| 1047 | // Retag inputs and go slow case. |
| 1048 | Integer32ToSmi(src2, src2); |
| 1049 | if (src1.is(rax)) { |
| 1050 | movq(src1, kScratchRegister); |
| 1051 | } |
| 1052 | jmp(on_not_smi_result); |
| 1053 | bind(&safe_div); |
| 1054 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1055 | // Sign extend eax into edx:eax. |
| 1056 | cdq(); |
| 1057 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1058 | // Restore smi tags on inputs. |
| 1059 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1060 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1061 | movq(src1, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1062 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1063 | // Check for a negative zero result. If the result is zero, and the |
| 1064 | // dividend is negative, go slow to return a floating point negative zero. |
| 1065 | Label smi_result; |
| 1066 | testl(rdx, rdx); |
| 1067 | j(not_zero, &smi_result); |
| 1068 | testq(src1, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1069 | j(negative, on_not_smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1070 | bind(&smi_result); |
| 1071 | Integer32ToSmi(dst, rdx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1072 | } |
| 1073 | |
| 1074 | |
| 1075 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1076 | ASSERT(!dst.is(kScratchRegister)); |
| 1077 | ASSERT(!src.is(kScratchRegister)); |
| 1078 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1079 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1080 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1081 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1082 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1083 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1084 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1085 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | |
| 1089 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1090 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1091 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1092 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1093 | } |
| 1094 | and_(dst, src2); |
| 1095 | } |
| 1096 | |
| 1097 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1098 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1099 | if (constant->value() == 0) { |
| 1100 | xor_(dst, dst); |
| 1101 | } else if (dst.is(src)) { |
| 1102 | ASSERT(!dst.is(kScratchRegister)); |
| 1103 | Move(kScratchRegister, constant); |
| 1104 | and_(dst, kScratchRegister); |
| 1105 | } else { |
| 1106 | Move(dst, constant); |
| 1107 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1108 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1113 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1114 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1115 | } |
| 1116 | or_(dst, src2); |
| 1117 | } |
| 1118 | |
| 1119 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1120 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1121 | if (dst.is(src)) { |
| 1122 | ASSERT(!dst.is(kScratchRegister)); |
| 1123 | Move(kScratchRegister, constant); |
| 1124 | or_(dst, kScratchRegister); |
| 1125 | } else { |
| 1126 | Move(dst, constant); |
| 1127 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1128 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1129 | } |
| 1130 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1131 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1132 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1133 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1134 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1135 | } |
| 1136 | xor_(dst, src2); |
| 1137 | } |
| 1138 | |
| 1139 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1140 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1141 | if (dst.is(src)) { |
| 1142 | ASSERT(!dst.is(kScratchRegister)); |
| 1143 | Move(kScratchRegister, constant); |
| 1144 | xor_(dst, kScratchRegister); |
| 1145 | } else { |
| 1146 | Move(dst, constant); |
| 1147 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1148 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1152 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1153 | Register src, |
| 1154 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1155 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1156 | if (shift_value > 0) { |
| 1157 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1158 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1159 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1160 | } else { |
| 1161 | UNIMPLEMENTED(); // Not used. |
| 1162 | } |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | |
| 1167 | void MacroAssembler::SmiShiftLogicalRightConstant(Register dst, |
| 1168 | Register src, |
| 1169 | int shift_value, |
| 1170 | Label* on_not_smi_result) { |
| 1171 | // Logic right shift interprets its result as an *unsigned* number. |
| 1172 | if (dst.is(src)) { |
| 1173 | UNIMPLEMENTED(); // Not used. |
| 1174 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1175 | movq(dst, src); |
| 1176 | if (shift_value == 0) { |
| 1177 | testq(dst, dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1178 | j(negative, on_not_smi_result); |
| 1179 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1180 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1181 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | |
| 1186 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1187 | Register src, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1188 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1189 | if (!dst.is(src)) { |
| 1190 | movq(dst, src); |
| 1191 | } |
| 1192 | if (shift_value > 0) { |
| 1193 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | |
| 1198 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 1199 | Register src1, |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 1200 | Register src2) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1201 | ASSERT(!dst.is(rcx)); |
| 1202 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1203 | // Untag shift amount. |
| 1204 | if (!dst.is(src1)) { |
| 1205 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1206 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1207 | SmiToInteger32(rcx, src2); |
| 1208 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 1209 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1210 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | |
| 1214 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1215 | Register src1, |
| 1216 | Register src2, |
| 1217 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1218 | ASSERT(!dst.is(kScratchRegister)); |
| 1219 | ASSERT(!src1.is(kScratchRegister)); |
| 1220 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1221 | ASSERT(!dst.is(rcx)); |
| 1222 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1223 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1224 | movq(kScratchRegister, rcx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1225 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1226 | if (!dst.is(src1)) { |
| 1227 | movq(dst, src1); |
| 1228 | } |
| 1229 | SmiToInteger32(rcx, src2); |
| 1230 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1231 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1232 | shl(dst, Immediate(kSmiShift)); |
| 1233 | testq(dst, dst); |
| 1234 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1235 | Label positive_result; |
| 1236 | j(positive, &positive_result); |
| 1237 | if (src1.is(rcx)) { |
| 1238 | movq(src1, kScratchRegister); |
| 1239 | } else { |
| 1240 | movq(src2, kScratchRegister); |
| 1241 | } |
| 1242 | jmp(on_not_smi_result); |
| 1243 | bind(&positive_result); |
| 1244 | } else { |
| 1245 | j(negative, on_not_smi_result); // src2 was zero and src1 negative. |
| 1246 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1247 | } |
| 1248 | |
| 1249 | |
| 1250 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1251 | Register src1, |
| 1252 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1253 | ASSERT(!dst.is(kScratchRegister)); |
| 1254 | ASSERT(!src1.is(kScratchRegister)); |
| 1255 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1256 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1257 | if (src1.is(rcx)) { |
| 1258 | movq(kScratchRegister, src1); |
| 1259 | } else if (src2.is(rcx)) { |
| 1260 | movq(kScratchRegister, src2); |
| 1261 | } |
| 1262 | if (!dst.is(src1)) { |
| 1263 | movq(dst, src1); |
| 1264 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1265 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1266 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1267 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1268 | shl(dst, Immediate(kSmiShift)); |
| 1269 | if (src1.is(rcx)) { |
| 1270 | movq(src1, kScratchRegister); |
| 1271 | } else if (src2.is(rcx)) { |
| 1272 | movq(src2, kScratchRegister); |
| 1273 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | void MacroAssembler::SelectNonSmi(Register dst, |
| 1278 | Register src1, |
| 1279 | Register src2, |
| 1280 | Label* on_not_smis) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1281 | ASSERT(!dst.is(kScratchRegister)); |
| 1282 | ASSERT(!src1.is(kScratchRegister)); |
| 1283 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1284 | ASSERT(!dst.is(src1)); |
| 1285 | ASSERT(!dst.is(src2)); |
| 1286 | // Both operands must not be smis. |
| 1287 | #ifdef DEBUG |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1288 | if (allow_stub_calls()) { // Check contains a stub call. |
| 1289 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 1290 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 1291 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1292 | #endif |
| 1293 | ASSERT_EQ(0, kSmiTag); |
| 1294 | ASSERT_EQ(0, Smi::FromInt(0)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1295 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1296 | and_(kScratchRegister, src1); |
| 1297 | testl(kScratchRegister, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1298 | // If non-zero then both are smis. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1299 | j(not_zero, on_not_smis); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1300 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1301 | // Exactly one operand is a smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1302 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 1303 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 1304 | subq(kScratchRegister, Immediate(1)); |
| 1305 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 1306 | movq(dst, src1); |
| 1307 | xor_(dst, src2); |
| 1308 | and_(dst, kScratchRegister); |
| 1309 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 1310 | xor_(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1311 | // 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] | 1312 | } |
| 1313 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1314 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 1315 | Register src, |
| 1316 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1317 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1318 | // There is a possible optimization if shift is in the range 60-63, but that |
| 1319 | // will (and must) never happen. |
| 1320 | if (!dst.is(src)) { |
| 1321 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1322 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1323 | if (shift < kSmiShift) { |
| 1324 | sar(dst, Immediate(kSmiShift - shift)); |
| 1325 | } else { |
| 1326 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1327 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1328 | return SmiIndex(dst, times_1); |
| 1329 | } |
| 1330 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1331 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 1332 | Register src, |
| 1333 | int shift) { |
| 1334 | // Register src holds a positive smi. |
| 1335 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1336 | if (!dst.is(src)) { |
| 1337 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1338 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1339 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1340 | if (shift < kSmiShift) { |
| 1341 | sar(dst, Immediate(kSmiShift - shift)); |
| 1342 | } else { |
| 1343 | shl(dst, Immediate(shift - kSmiShift)); |
| 1344 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1345 | return SmiIndex(dst, times_1); |
| 1346 | } |
| 1347 | |
| 1348 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1349 | void MacroAssembler::JumpIfSmi(Register src, Label* on_smi) { |
| 1350 | ASSERT_EQ(0, kSmiTag); |
| 1351 | Condition smi = CheckSmi(src); |
| 1352 | j(smi, on_smi); |
| 1353 | } |
| 1354 | |
| 1355 | |
| 1356 | void MacroAssembler::JumpIfNotSmi(Register src, Label* on_not_smi) { |
| 1357 | Condition smi = CheckSmi(src); |
| 1358 | j(NegateCondition(smi), on_not_smi); |
| 1359 | } |
| 1360 | |
| 1361 | |
| 1362 | void MacroAssembler::JumpIfNotPositiveSmi(Register src, |
| 1363 | Label* on_not_positive_smi) { |
| 1364 | Condition positive_smi = CheckPositiveSmi(src); |
| 1365 | j(NegateCondition(positive_smi), on_not_positive_smi); |
| 1366 | } |
| 1367 | |
| 1368 | |
| 1369 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1370 | Smi* constant, |
| 1371 | Label* on_equals) { |
| 1372 | SmiCompare(src, constant); |
| 1373 | j(equal, on_equals); |
| 1374 | } |
| 1375 | |
| 1376 | |
| 1377 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, Label* on_invalid) { |
| 1378 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1379 | j(NegateCondition(is_valid), on_invalid); |
| 1380 | } |
| 1381 | |
| 1382 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1383 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1384 | Label* on_invalid) { |
| 1385 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1386 | j(NegateCondition(is_valid), on_invalid); |
| 1387 | } |
| 1388 | |
| 1389 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1390 | void MacroAssembler::JumpIfNotBothSmi(Register src1, Register src2, |
| 1391 | Label* on_not_both_smi) { |
| 1392 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1393 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1394 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1395 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1396 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1397 | void MacroAssembler::JumpIfNotBothPositiveSmi(Register src1, Register src2, |
| 1398 | Label* on_not_both_smi) { |
| 1399 | Condition both_smi = CheckBothPositiveSmi(src1, src2); |
| 1400 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1401 | } |
| 1402 | |
| 1403 | |
| 1404 | |
| 1405 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| 1406 | Register second_object, |
| 1407 | Register scratch1, |
| 1408 | Register scratch2, |
| 1409 | Label* on_fail) { |
| 1410 | // Check that both objects are not smis. |
| 1411 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 1412 | j(either_smi, on_fail); |
| 1413 | |
| 1414 | // Load instance type for both strings. |
| 1415 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 1416 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 1417 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 1418 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 1419 | |
| 1420 | // Check that both are flat ascii strings. |
| 1421 | ASSERT(kNotStringTag != 0); |
| 1422 | const int kFlatAsciiStringMask = |
| 1423 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1424 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1425 | |
| 1426 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1427 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1428 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1429 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1430 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1431 | cmpl(scratch1, |
| 1432 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1433 | j(not_equal, on_fail); |
| 1434 | } |
| 1435 | |
| 1436 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1437 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii( |
| 1438 | Register instance_type, |
| 1439 | Register scratch, |
| 1440 | Label *failure) { |
| 1441 | if (!scratch.is(instance_type)) { |
| 1442 | movl(scratch, instance_type); |
| 1443 | } |
| 1444 | |
| 1445 | const int kFlatAsciiStringMask = |
| 1446 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1447 | |
| 1448 | andl(scratch, Immediate(kFlatAsciiStringMask)); |
| 1449 | cmpl(scratch, Immediate(kStringTag | kSeqStringTag | kAsciiStringTag)); |
| 1450 | j(not_equal, failure); |
| 1451 | } |
| 1452 | |
| 1453 | |
| 1454 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 1455 | Register first_object_instance_type, |
| 1456 | Register second_object_instance_type, |
| 1457 | Register scratch1, |
| 1458 | Register scratch2, |
| 1459 | Label* on_fail) { |
| 1460 | // Load instance type for both strings. |
| 1461 | movq(scratch1, first_object_instance_type); |
| 1462 | movq(scratch2, second_object_instance_type); |
| 1463 | |
| 1464 | // Check that both are flat ascii strings. |
| 1465 | ASSERT(kNotStringTag != 0); |
| 1466 | const int kFlatAsciiStringMask = |
| 1467 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1468 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1469 | |
| 1470 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1471 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1472 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1473 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1474 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1475 | cmpl(scratch1, |
| 1476 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1477 | j(not_equal, on_fail); |
| 1478 | } |
| 1479 | |
| 1480 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1481 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1482 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1483 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1484 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1485 | } else { |
| 1486 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | |
| 1491 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1492 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1493 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1494 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1495 | } else { |
| 1496 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1497 | movq(dst, kScratchRegister); |
| 1498 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1499 | } |
| 1500 | |
| 1501 | |
| 1502 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1503 | if (source->IsSmi()) { |
| 1504 | SmiCompare(dst, Smi::cast(*source)); |
| 1505 | } else { |
| 1506 | Move(kScratchRegister, source); |
| 1507 | cmpq(dst, kScratchRegister); |
| 1508 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1509 | } |
| 1510 | |
| 1511 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1512 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1513 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1514 | SmiCompare(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1515 | } else { |
| 1516 | ASSERT(source->IsHeapObject()); |
| 1517 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1518 | cmpq(dst, kScratchRegister); |
| 1519 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1520 | } |
| 1521 | |
| 1522 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1523 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1524 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1525 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1526 | } else { |
| 1527 | ASSERT(source->IsHeapObject()); |
| 1528 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1529 | push(kScratchRegister); |
| 1530 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1531 | } |
| 1532 | |
| 1533 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1534 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1535 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 1536 | if (is_int32(smi)) { |
| 1537 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1538 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1539 | Set(kScratchRegister, smi); |
| 1540 | push(kScratchRegister); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1541 | } |
| 1542 | } |
| 1543 | |
| 1544 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1545 | void MacroAssembler::Drop(int stack_elements) { |
| 1546 | if (stack_elements > 0) { |
| 1547 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1552 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1553 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1554 | } |
| 1555 | |
| 1556 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1557 | void MacroAssembler::Jump(ExternalReference ext) { |
| 1558 | movq(kScratchRegister, ext); |
| 1559 | jmp(kScratchRegister); |
| 1560 | } |
| 1561 | |
| 1562 | |
| 1563 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 1564 | movq(kScratchRegister, destination, rmode); |
| 1565 | jmp(kScratchRegister); |
| 1566 | } |
| 1567 | |
| 1568 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1569 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1570 | // TODO(X64): Inline this |
| 1571 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1572 | } |
| 1573 | |
| 1574 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1575 | void MacroAssembler::Call(ExternalReference ext) { |
| 1576 | movq(kScratchRegister, ext); |
| 1577 | call(kScratchRegister); |
| 1578 | } |
| 1579 | |
| 1580 | |
| 1581 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| 1582 | movq(kScratchRegister, destination, rmode); |
| 1583 | call(kScratchRegister); |
| 1584 | } |
| 1585 | |
| 1586 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1587 | void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1588 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1589 | WriteRecordedPositions(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1590 | call(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1591 | } |
| 1592 | |
| 1593 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1594 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 1595 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1596 | // Adjust this code if not the case. |
| 1597 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 1598 | |
| 1599 | // The pc (return address) is already on TOS. This code pushes state, |
| 1600 | // frame pointer and current handler. Check that they are expected |
| 1601 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1602 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 1603 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1604 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1605 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 1606 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1607 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 1608 | |
| 1609 | if (try_location == IN_JAVASCRIPT) { |
| 1610 | if (type == TRY_CATCH_HANDLER) { |
| 1611 | push(Immediate(StackHandler::TRY_CATCH)); |
| 1612 | } else { |
| 1613 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 1614 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1615 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1616 | } else { |
| 1617 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1618 | // The frame pointer does not point to a JS frame so we save NULL |
| 1619 | // for rbp. We expect the code throwing an exception to check rbp |
| 1620 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1621 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1622 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1623 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1624 | // Save the current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1625 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1626 | push(Operand(kScratchRegister, 0)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1627 | // Link this handler. |
| 1628 | movq(Operand(kScratchRegister, 0), rsp); |
| 1629 | } |
| 1630 | |
| 1631 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1632 | void MacroAssembler::PopTryHandler() { |
| 1633 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 1634 | // Unlink this handler. |
| 1635 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
| 1636 | pop(Operand(kScratchRegister, 0)); |
| 1637 | // Remove the remaining fields. |
| 1638 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 1639 | } |
| 1640 | |
| 1641 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1642 | void MacroAssembler::Ret() { |
| 1643 | ret(0); |
| 1644 | } |
| 1645 | |
| 1646 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1647 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1648 | fucomip(); |
| 1649 | ffree(0); |
| 1650 | fincstp(); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1651 | } |
| 1652 | |
| 1653 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1654 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 1655 | InstanceType type, |
| 1656 | Register map) { |
| 1657 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1658 | CmpInstanceType(map, type); |
| 1659 | } |
| 1660 | |
| 1661 | |
| 1662 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 1663 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 1664 | Immediate(static_cast<int8_t>(type))); |
| 1665 | } |
| 1666 | |
| 1667 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1668 | void MacroAssembler::CheckMap(Register obj, |
| 1669 | Handle<Map> map, |
| 1670 | Label* fail, |
| 1671 | bool is_heap_object) { |
| 1672 | if (!is_heap_object) { |
| 1673 | JumpIfSmi(obj, fail); |
| 1674 | } |
| 1675 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 1676 | j(not_equal, fail); |
| 1677 | } |
| 1678 | |
| 1679 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1680 | void MacroAssembler::AbortIfNotNumber(Register object) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1681 | Label ok; |
| 1682 | Condition is_smi = CheckSmi(object); |
| 1683 | j(is_smi, &ok); |
| 1684 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 1685 | Factory::heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1686 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1687 | bind(&ok); |
| 1688 | } |
| 1689 | |
| 1690 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1691 | void MacroAssembler::AbortIfNotSmi(Register object) { |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1692 | Label ok; |
| 1693 | Condition is_smi = CheckSmi(object); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1694 | Assert(is_smi, "Operand not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1695 | } |
| 1696 | |
| 1697 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1698 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 1699 | Register map, |
| 1700 | Register instance_type) { |
| 1701 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1702 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 1703 | ASSERT(kNotStringTag != 0); |
| 1704 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 1705 | return zero; |
| 1706 | } |
| 1707 | |
| 1708 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1709 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 1710 | Register result, |
| 1711 | Label* miss) { |
| 1712 | // Check that the receiver isn't a smi. |
| 1713 | testl(function, Immediate(kSmiTagMask)); |
| 1714 | j(zero, miss); |
| 1715 | |
| 1716 | // Check that the function really is a function. |
| 1717 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 1718 | j(not_equal, miss); |
| 1719 | |
| 1720 | // Make sure that the function has an instance prototype. |
| 1721 | Label non_instance; |
| 1722 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 1723 | Immediate(1 << Map::kHasNonInstancePrototype)); |
| 1724 | j(not_zero, &non_instance); |
| 1725 | |
| 1726 | // Get the prototype or initial map from the function. |
| 1727 | movq(result, |
| 1728 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1729 | |
| 1730 | // If the prototype or initial map is the hole, don't return it and |
| 1731 | // simply miss the cache instead. This will allow us to allocate a |
| 1732 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1733 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1734 | j(equal, miss); |
| 1735 | |
| 1736 | // If the function does not have an initial map, we're done. |
| 1737 | Label done; |
| 1738 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| 1739 | j(not_equal, &done); |
| 1740 | |
| 1741 | // Get the prototype from the initial map. |
| 1742 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 1743 | jmp(&done); |
| 1744 | |
| 1745 | // Non-instance prototype: Fetch prototype from constructor field |
| 1746 | // in initial map. |
| 1747 | bind(&non_instance); |
| 1748 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 1749 | |
| 1750 | // All done. |
| 1751 | bind(&done); |
| 1752 | } |
| 1753 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1754 | |
| 1755 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 1756 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1757 | movq(kScratchRegister, ExternalReference(counter)); |
| 1758 | movl(Operand(kScratchRegister, 0), Immediate(value)); |
| 1759 | } |
| 1760 | } |
| 1761 | |
| 1762 | |
| 1763 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 1764 | ASSERT(value > 0); |
| 1765 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1766 | movq(kScratchRegister, ExternalReference(counter)); |
| 1767 | Operand operand(kScratchRegister, 0); |
| 1768 | if (value == 1) { |
| 1769 | incl(operand); |
| 1770 | } else { |
| 1771 | addl(operand, Immediate(value)); |
| 1772 | } |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | |
| 1777 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 1778 | ASSERT(value > 0); |
| 1779 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1780 | movq(kScratchRegister, ExternalReference(counter)); |
| 1781 | Operand operand(kScratchRegister, 0); |
| 1782 | if (value == 1) { |
| 1783 | decl(operand); |
| 1784 | } else { |
| 1785 | subl(operand, Immediate(value)); |
| 1786 | } |
| 1787 | } |
| 1788 | } |
| 1789 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1790 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 1791 | |
| 1792 | void MacroAssembler::PushRegistersFromMemory(RegList regs) { |
| 1793 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1794 | // Push the content of the memory location to the stack. |
| 1795 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 1796 | int r = JSCallerSavedCode(i); |
| 1797 | if ((regs & (1 << r)) != 0) { |
| 1798 | ExternalReference reg_addr = |
| 1799 | ExternalReference(Debug_Address::Register(i)); |
| 1800 | movq(kScratchRegister, reg_addr); |
| 1801 | push(Operand(kScratchRegister, 0)); |
| 1802 | } |
| 1803 | } |
| 1804 | } |
| 1805 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1806 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1807 | void MacroAssembler::SaveRegistersToMemory(RegList regs) { |
| 1808 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1809 | // Copy the content of registers to memory location. |
| 1810 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 1811 | int r = JSCallerSavedCode(i); |
| 1812 | if ((regs & (1 << r)) != 0) { |
| 1813 | Register reg = { r }; |
| 1814 | ExternalReference reg_addr = |
| 1815 | ExternalReference(Debug_Address::Register(i)); |
| 1816 | movq(kScratchRegister, reg_addr); |
| 1817 | movq(Operand(kScratchRegister, 0), reg); |
| 1818 | } |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | |
| 1823 | void MacroAssembler::RestoreRegistersFromMemory(RegList regs) { |
| 1824 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1825 | // Copy the content of memory location to registers. |
| 1826 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1827 | int r = JSCallerSavedCode(i); |
| 1828 | if ((regs & (1 << r)) != 0) { |
| 1829 | Register reg = { r }; |
| 1830 | ExternalReference reg_addr = |
| 1831 | ExternalReference(Debug_Address::Register(i)); |
| 1832 | movq(kScratchRegister, reg_addr); |
| 1833 | movq(reg, Operand(kScratchRegister, 0)); |
| 1834 | } |
| 1835 | } |
| 1836 | } |
| 1837 | |
| 1838 | |
| 1839 | void MacroAssembler::PopRegistersToMemory(RegList regs) { |
| 1840 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1841 | // Pop the content from the stack to the memory location. |
| 1842 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1843 | int r = JSCallerSavedCode(i); |
| 1844 | if ((regs & (1 << r)) != 0) { |
| 1845 | ExternalReference reg_addr = |
| 1846 | ExternalReference(Debug_Address::Register(i)); |
| 1847 | movq(kScratchRegister, reg_addr); |
| 1848 | pop(Operand(kScratchRegister, 0)); |
| 1849 | } |
| 1850 | } |
| 1851 | } |
| 1852 | |
| 1853 | |
| 1854 | void MacroAssembler::CopyRegistersFromStackToMemory(Register base, |
| 1855 | Register scratch, |
| 1856 | RegList regs) { |
| 1857 | ASSERT(!scratch.is(kScratchRegister)); |
| 1858 | ASSERT(!base.is(kScratchRegister)); |
| 1859 | ASSERT(!base.is(scratch)); |
| 1860 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1861 | // Copy the content of the stack to the memory location and adjust base. |
| 1862 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1863 | int r = JSCallerSavedCode(i); |
| 1864 | if ((regs & (1 << r)) != 0) { |
| 1865 | movq(scratch, Operand(base, 0)); |
| 1866 | ExternalReference reg_addr = |
| 1867 | ExternalReference(Debug_Address::Register(i)); |
| 1868 | movq(kScratchRegister, reg_addr); |
| 1869 | movq(Operand(kScratchRegister, 0), scratch); |
| 1870 | lea(base, Operand(base, kPointerSize)); |
| 1871 | } |
| 1872 | } |
| 1873 | } |
| 1874 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1875 | void MacroAssembler::DebugBreak() { |
| 1876 | ASSERT(allow_stub_calls()); |
| 1877 | xor_(rax, rax); // no arguments |
| 1878 | movq(rbx, ExternalReference(Runtime::kDebugBreak)); |
| 1879 | CEntryStub ces(1); |
| 1880 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1881 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1882 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1883 | |
| 1884 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1885 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1886 | const ParameterCount& actual, |
| 1887 | Handle<Code> code_constant, |
| 1888 | Register code_register, |
| 1889 | Label* done, |
| 1890 | InvokeFlag flag) { |
| 1891 | bool definitely_matches = false; |
| 1892 | Label invoke; |
| 1893 | if (expected.is_immediate()) { |
| 1894 | ASSERT(actual.is_immediate()); |
| 1895 | if (expected.immediate() == actual.immediate()) { |
| 1896 | definitely_matches = true; |
| 1897 | } else { |
| 1898 | movq(rax, Immediate(actual.immediate())); |
| 1899 | if (expected.immediate() == |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1900 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1901 | // Don't worry about adapting arguments for built-ins that |
| 1902 | // don't want that done. Skip adaption code by making it look |
| 1903 | // like we have a match between expected and actual number of |
| 1904 | // arguments. |
| 1905 | definitely_matches = true; |
| 1906 | } else { |
| 1907 | movq(rbx, Immediate(expected.immediate())); |
| 1908 | } |
| 1909 | } |
| 1910 | } else { |
| 1911 | if (actual.is_immediate()) { |
| 1912 | // Expected is in register, actual is immediate. This is the |
| 1913 | // case when we invoke function values without going through the |
| 1914 | // IC mechanism. |
| 1915 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 1916 | j(equal, &invoke); |
| 1917 | ASSERT(expected.reg().is(rbx)); |
| 1918 | movq(rax, Immediate(actual.immediate())); |
| 1919 | } else if (!expected.reg().is(actual.reg())) { |
| 1920 | // Both expected and actual are in (different) registers. This |
| 1921 | // is the case when we invoke functions using call and apply. |
| 1922 | cmpq(expected.reg(), actual.reg()); |
| 1923 | j(equal, &invoke); |
| 1924 | ASSERT(actual.reg().is(rax)); |
| 1925 | ASSERT(expected.reg().is(rbx)); |
| 1926 | } |
| 1927 | } |
| 1928 | |
| 1929 | if (!definitely_matches) { |
| 1930 | Handle<Code> adaptor = |
| 1931 | Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 1932 | if (!code_constant.is_null()) { |
| 1933 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 1934 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 1935 | } else if (!code_register.is(rdx)) { |
| 1936 | movq(rdx, code_register); |
| 1937 | } |
| 1938 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1939 | if (flag == CALL_FUNCTION) { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1940 | Call(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1941 | jmp(done); |
| 1942 | } else { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1943 | Jump(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1944 | } |
| 1945 | bind(&invoke); |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1950 | void MacroAssembler::InvokeCode(Register code, |
| 1951 | const ParameterCount& expected, |
| 1952 | const ParameterCount& actual, |
| 1953 | InvokeFlag flag) { |
| 1954 | Label done; |
| 1955 | InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| 1956 | if (flag == CALL_FUNCTION) { |
| 1957 | call(code); |
| 1958 | } else { |
| 1959 | ASSERT(flag == JUMP_FUNCTION); |
| 1960 | jmp(code); |
| 1961 | } |
| 1962 | bind(&done); |
| 1963 | } |
| 1964 | |
| 1965 | |
| 1966 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 1967 | const ParameterCount& expected, |
| 1968 | const ParameterCount& actual, |
| 1969 | RelocInfo::Mode rmode, |
| 1970 | InvokeFlag flag) { |
| 1971 | Label done; |
| 1972 | Register dummy = rax; |
| 1973 | InvokePrologue(expected, actual, code, dummy, &done, flag); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1974 | if (flag == CALL_FUNCTION) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1975 | Call(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1976 | } else { |
| 1977 | ASSERT(flag == JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1978 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1979 | } |
| 1980 | bind(&done); |
| 1981 | } |
| 1982 | |
| 1983 | |
| 1984 | void MacroAssembler::InvokeFunction(Register function, |
| 1985 | const ParameterCount& actual, |
| 1986 | InvokeFlag flag) { |
| 1987 | ASSERT(function.is(rdi)); |
| 1988 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 1989 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1990 | movsxlq(rbx, |
| 1991 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1992 | movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1993 | // 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] | 1994 | // the executable code. |
| 1995 | lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 1996 | |
| 1997 | ParameterCount expected(rbx); |
| 1998 | InvokeCode(rdx, expected, actual, flag); |
| 1999 | } |
| 2000 | |
| 2001 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2002 | void MacroAssembler::InvokeFunction(JSFunction* function, |
| 2003 | const ParameterCount& actual, |
| 2004 | InvokeFlag flag) { |
| 2005 | ASSERT(function->is_compiled()); |
| 2006 | // Get the function and setup the context. |
| 2007 | Move(rdi, Handle<JSFunction>(function)); |
| 2008 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 2009 | |
| 2010 | // Invoke the cached code. |
| 2011 | Handle<Code> code(function->code()); |
| 2012 | ParameterCount expected(function->shared()->formal_parameter_count()); |
| 2013 | InvokeCode(code, expected, actual, RelocInfo::CODE_TARGET, flag); |
| 2014 | } |
| 2015 | |
| 2016 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2017 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 2018 | push(rbp); |
| 2019 | movq(rbp, rsp); |
| 2020 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2021 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2022 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 2023 | push(kScratchRegister); |
| 2024 | if (FLAG_debug_code) { |
| 2025 | movq(kScratchRegister, |
| 2026 | Factory::undefined_value(), |
| 2027 | RelocInfo::EMBEDDED_OBJECT); |
| 2028 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 2029 | Check(not_equal, "code object not properly patched"); |
| 2030 | } |
| 2031 | } |
| 2032 | |
| 2033 | |
| 2034 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 2035 | if (FLAG_debug_code) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2036 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2037 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 2038 | Check(equal, "stack frame types must match"); |
| 2039 | } |
| 2040 | movq(rsp, rbp); |
| 2041 | pop(rbp); |
| 2042 | } |
| 2043 | |
| 2044 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2045 | void MacroAssembler::EnterExitFrame(ExitFrame::Mode mode, int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2046 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2047 | // 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] | 2048 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 2049 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 2050 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 2051 | push(rbp); |
| 2052 | movq(rbp, rsp); |
| 2053 | |
| 2054 | // 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] | 2055 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2056 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 2057 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 2058 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2059 | |
| 2060 | // Save the frame pointer and the context in top. |
| 2061 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 2062 | ExternalReference context_address(Top::k_context_address); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2063 | movq(r14, rax); // Backup rax before we use it. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2064 | |
| 2065 | movq(rax, rbp); |
| 2066 | store_rax(c_entry_fp_address); |
| 2067 | movq(rax, rsi); |
| 2068 | store_rax(context_address); |
| 2069 | |
| 2070 | // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
| 2071 | // so it must be retained across the C-call. |
| 2072 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 2073 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2074 | |
| 2075 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2076 | // Save the state of all registers to the stack from the memory |
| 2077 | // location. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2078 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2079 | // TODO(1243899): This should be symmetric to |
| 2080 | // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
| 2081 | // correct here, but computed for the other call. Very error |
| 2082 | // prone! FIX THIS. Actually there are deeper problems with |
| 2083 | // register saving than this asymmetry (see the bug report |
| 2084 | // associated with this issue). |
| 2085 | PushRegistersFromMemory(kJSCallerSaved); |
| 2086 | } |
| 2087 | #endif |
| 2088 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2089 | #ifdef _WIN64 |
| 2090 | // Reserve space on stack for result and argument structures, if necessary. |
| 2091 | int result_stack_space = (result_size < 2) ? 0 : result_size * kPointerSize; |
| 2092 | // Reserve space for the Arguments object. The Windows 64-bit ABI |
| 2093 | // requires us to pass this structure as a pointer to its location on |
| 2094 | // the stack. The structure contains 2 values. |
| 2095 | int argument_stack_space = 2 * kPointerSize; |
| 2096 | // We also need backing space for 4 parameters, even though |
| 2097 | // we only pass one or two parameter, and it is in a register. |
| 2098 | int argument_mirror_space = 4 * kPointerSize; |
| 2099 | int total_stack_space = |
| 2100 | argument_mirror_space + argument_stack_space + result_stack_space; |
| 2101 | subq(rsp, Immediate(total_stack_space)); |
| 2102 | #endif |
| 2103 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2104 | // Get the required frame alignment for the OS. |
| 2105 | static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| 2106 | if (kFrameAlignment > 0) { |
| 2107 | ASSERT(IsPowerOf2(kFrameAlignment)); |
| 2108 | movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| 2109 | and_(rsp, kScratchRegister); |
| 2110 | } |
| 2111 | |
| 2112 | // Patch the saved entry sp. |
| 2113 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 2114 | } |
| 2115 | |
| 2116 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2117 | void MacroAssembler::LeaveExitFrame(ExitFrame::Mode mode, int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2118 | // Registers: |
| 2119 | // r15 : argv |
| 2120 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2121 | // Restore the memory copy of the registers by digging them out from |
| 2122 | // the stack. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2123 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2124 | // 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] | 2125 | // the function pointer after this. |
| 2126 | const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2127 | int kOffset = ExitFrameConstants::kCodeOffset - kCallerSavedSize; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2128 | lea(rbx, Operand(rbp, kOffset)); |
| 2129 | CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved); |
| 2130 | } |
| 2131 | #endif |
| 2132 | |
| 2133 | // Get the return address from the stack and restore the frame pointer. |
| 2134 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 2135 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 2136 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2137 | // Pop everything up to and including the arguments and the receiver |
| 2138 | // from the caller stack. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2139 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
| 2140 | |
| 2141 | // Restore current context from top and clear it in debug mode. |
| 2142 | ExternalReference context_address(Top::k_context_address); |
| 2143 | movq(kScratchRegister, context_address); |
| 2144 | movq(rsi, Operand(kScratchRegister, 0)); |
| 2145 | #ifdef DEBUG |
| 2146 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2147 | #endif |
| 2148 | |
| 2149 | // Push the return address to get ready to return. |
| 2150 | push(rcx); |
| 2151 | |
| 2152 | // Clear the top frame. |
| 2153 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 2154 | movq(kScratchRegister, c_entry_fp_address); |
| 2155 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2156 | } |
| 2157 | |
| 2158 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2159 | Register MacroAssembler::CheckMaps(JSObject* object, |
| 2160 | Register object_reg, |
| 2161 | JSObject* holder, |
| 2162 | Register holder_reg, |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2163 | Register scratch, |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 2164 | int save_at_depth, |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2165 | Label* miss) { |
| 2166 | // Make sure there's no overlap between scratch and the other |
| 2167 | // registers. |
| 2168 | ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg)); |
| 2169 | |
| 2170 | // Keep track of the current object in register reg. On the first |
| 2171 | // iteration, reg is an alias for object_reg, on later iterations, |
| 2172 | // it is an alias for holder_reg. |
| 2173 | Register reg = object_reg; |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 2174 | int depth = 0; |
| 2175 | |
| 2176 | if (save_at_depth == depth) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2177 | movq(Operand(rsp, kPointerSize), object_reg); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 2178 | } |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2179 | |
| 2180 | // Check the maps in the prototype chain. |
| 2181 | // Traverse the prototype chain from the object and do map checks. |
| 2182 | while (object != holder) { |
| 2183 | depth++; |
| 2184 | |
| 2185 | // Only global objects and objects that do not require access |
| 2186 | // checks are allowed in stubs. |
| 2187 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 2188 | |
| 2189 | JSObject* prototype = JSObject::cast(object->GetPrototype()); |
| 2190 | if (Heap::InNewSpace(prototype)) { |
| 2191 | // Get the map of the current object. |
| 2192 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 2193 | Cmp(scratch, Handle<Map>(object->map())); |
| 2194 | // Branch on the result of the map check. |
| 2195 | j(not_equal, miss); |
| 2196 | // Check access rights to the global object. This has to happen |
| 2197 | // after the map check so that we know that the object is |
| 2198 | // actually a global object. |
| 2199 | if (object->IsJSGlobalProxy()) { |
| 2200 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2201 | |
| 2202 | // Restore scratch register to be the map of the object. |
| 2203 | // We load the prototype from the map in the scratch register. |
| 2204 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 2205 | } |
| 2206 | // The prototype is in new space; we cannot store a reference |
| 2207 | // to it in the code. Load it from the map. |
| 2208 | reg = holder_reg; // from now the object is in holder_reg |
| 2209 | movq(reg, FieldOperand(scratch, Map::kPrototypeOffset)); |
| 2210 | |
| 2211 | } else { |
| 2212 | // Check the map of the current object. |
| 2213 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| 2214 | Handle<Map>(object->map())); |
| 2215 | // Branch on the result of the map check. |
| 2216 | j(not_equal, miss); |
| 2217 | // Check access rights to the global object. This has to happen |
| 2218 | // after the map check so that we know that the object is |
| 2219 | // actually a global object. |
| 2220 | if (object->IsJSGlobalProxy()) { |
| 2221 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2222 | } |
| 2223 | // The prototype is in old space; load it directly. |
| 2224 | reg = holder_reg; // from now the object is in holder_reg |
| 2225 | Move(reg, Handle<JSObject>(prototype)); |
| 2226 | } |
| 2227 | |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 2228 | if (save_at_depth == depth) { |
| 2229 | movq(Operand(rsp, kPointerSize), reg); |
| 2230 | } |
| 2231 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2232 | // Go to the next object in the prototype chain. |
| 2233 | object = prototype; |
| 2234 | } |
| 2235 | |
| 2236 | // Check the holder map. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2237 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), Handle<Map>(holder->map())); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2238 | j(not_equal, miss); |
| 2239 | |
| 2240 | // Log the check depth. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 2241 | LOG(IntEvent("check-maps-depth", depth + 1)); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2242 | |
| 2243 | // Perform security check for access to the global object and return |
| 2244 | // the holder register. |
| 2245 | ASSERT(object == holder); |
| 2246 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 2247 | if (object->IsJSGlobalProxy()) { |
| 2248 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2249 | } |
| 2250 | return reg; |
| 2251 | } |
| 2252 | |
| 2253 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2254 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 2255 | Register scratch, |
| 2256 | Label* miss) { |
| 2257 | Label same_contexts; |
| 2258 | |
| 2259 | ASSERT(!holder_reg.is(scratch)); |
| 2260 | ASSERT(!scratch.is(kScratchRegister)); |
| 2261 | // Load current lexical context from the stack frame. |
| 2262 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 2263 | |
| 2264 | // When generating debug code, make sure the lexical context is set. |
| 2265 | if (FLAG_debug_code) { |
| 2266 | cmpq(scratch, Immediate(0)); |
| 2267 | Check(not_equal, "we should not have an empty lexical context"); |
| 2268 | } |
| 2269 | // Load the global context of the current context. |
| 2270 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 2271 | movq(scratch, FieldOperand(scratch, offset)); |
| 2272 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 2273 | |
| 2274 | // Check the context is a global context. |
| 2275 | if (FLAG_debug_code) { |
| 2276 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
| 2277 | Factory::global_context_map()); |
| 2278 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2279 | } |
| 2280 | |
| 2281 | // Check if both contexts are the same. |
| 2282 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 2283 | j(equal, &same_contexts); |
| 2284 | |
| 2285 | // Compare security tokens. |
| 2286 | // Check that the security token in the calling global object is |
| 2287 | // compatible with the security token in the receiving global |
| 2288 | // object. |
| 2289 | |
| 2290 | // Check the context is a global context. |
| 2291 | if (FLAG_debug_code) { |
| 2292 | // Preserve original value of holder_reg. |
| 2293 | push(holder_reg); |
| 2294 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2295 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2296 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 2297 | |
| 2298 | // Read the first word and compare to global_context_map(), |
| 2299 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2300 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2301 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2302 | pop(holder_reg); |
| 2303 | } |
| 2304 | |
| 2305 | movq(kScratchRegister, |
| 2306 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2307 | int token_offset = |
| 2308 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2309 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 2310 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 2311 | j(not_equal, miss); |
| 2312 | |
| 2313 | bind(&same_contexts); |
| 2314 | } |
| 2315 | |
| 2316 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2317 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
| 2318 | Register result_end, |
| 2319 | Register scratch, |
| 2320 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2321 | ExternalReference new_space_allocation_top = |
| 2322 | ExternalReference::new_space_allocation_top_address(); |
| 2323 | |
| 2324 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2325 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2326 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2327 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2328 | #ifdef DEBUG |
| 2329 | // Assert that result actually contains top on entry. |
| 2330 | movq(kScratchRegister, new_space_allocation_top); |
| 2331 | cmpq(result, Operand(kScratchRegister, 0)); |
| 2332 | Check(equal, "Unexpected allocation top"); |
| 2333 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2334 | return; |
| 2335 | } |
| 2336 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2337 | // Move address of new object to result. Use scratch register if available, |
| 2338 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 2339 | if (scratch.is_valid()) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2340 | ASSERT(!scratch.is(result_end)); |
| 2341 | movq(scratch, new_space_allocation_top); |
| 2342 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2343 | } else if (result.is(rax)) { |
| 2344 | load_rax(new_space_allocation_top); |
| 2345 | } else { |
| 2346 | movq(kScratchRegister, new_space_allocation_top); |
| 2347 | movq(result, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2348 | } |
| 2349 | } |
| 2350 | |
| 2351 | |
| 2352 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 2353 | Register scratch) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2354 | if (FLAG_debug_code) { |
| 2355 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 2356 | Check(zero, "Unaligned allocation in new space"); |
| 2357 | } |
| 2358 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2359 | ExternalReference new_space_allocation_top = |
| 2360 | ExternalReference::new_space_allocation_top_address(); |
| 2361 | |
| 2362 | // Update new top. |
| 2363 | if (result_end.is(rax)) { |
| 2364 | // rax can be stored directly to a memory location. |
| 2365 | store_rax(new_space_allocation_top); |
| 2366 | } else { |
| 2367 | // Register required - use scratch provided if available. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2368 | if (scratch.is_valid()) { |
| 2369 | movq(Operand(scratch, 0), result_end); |
| 2370 | } else { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2371 | movq(kScratchRegister, new_space_allocation_top); |
| 2372 | movq(Operand(kScratchRegister, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2373 | } |
| 2374 | } |
| 2375 | } |
| 2376 | |
| 2377 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2378 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 2379 | Register result, |
| 2380 | Register result_end, |
| 2381 | Register scratch, |
| 2382 | Label* gc_required, |
| 2383 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2384 | ASSERT(!result.is(result_end)); |
| 2385 | |
| 2386 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2387 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2388 | |
| 2389 | // Calculate new top and bail out if new space is exhausted. |
| 2390 | ExternalReference new_space_allocation_limit = |
| 2391 | ExternalReference::new_space_allocation_limit_address(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2392 | |
| 2393 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 2394 | |
| 2395 | if (top_reg.is(result)) { |
| 2396 | addq(top_reg, Immediate(object_size)); |
| 2397 | } else { |
| 2398 | lea(top_reg, Operand(result, object_size)); |
| 2399 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2400 | movq(kScratchRegister, new_space_allocation_limit); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2401 | cmpq(top_reg, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2402 | j(above, gc_required); |
| 2403 | |
| 2404 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2405 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2406 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2407 | if (top_reg.is(result)) { |
| 2408 | if ((flags & TAG_OBJECT) != 0) { |
| 2409 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 2410 | } else { |
| 2411 | subq(result, Immediate(object_size)); |
| 2412 | } |
| 2413 | } else if ((flags & TAG_OBJECT) != 0) { |
| 2414 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2415 | addq(result, Immediate(kHeapObjectTag)); |
| 2416 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2417 | } |
| 2418 | |
| 2419 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2420 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 2421 | ScaleFactor element_size, |
| 2422 | Register element_count, |
| 2423 | Register result, |
| 2424 | Register result_end, |
| 2425 | Register scratch, |
| 2426 | Label* gc_required, |
| 2427 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2428 | ASSERT(!result.is(result_end)); |
| 2429 | |
| 2430 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2431 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2432 | |
| 2433 | // Calculate new top and bail out if new space is exhausted. |
| 2434 | ExternalReference new_space_allocation_limit = |
| 2435 | ExternalReference::new_space_allocation_limit_address(); |
| 2436 | lea(result_end, Operand(result, element_count, element_size, header_size)); |
| 2437 | movq(kScratchRegister, new_space_allocation_limit); |
| 2438 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2439 | j(above, gc_required); |
| 2440 | |
| 2441 | // Update allocation top. |
| 2442 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2443 | |
| 2444 | // Tag the result if requested. |
| 2445 | if ((flags & TAG_OBJECT) != 0) { |
| 2446 | addq(result, Immediate(kHeapObjectTag)); |
| 2447 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2448 | } |
| 2449 | |
| 2450 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2451 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 2452 | Register result, |
| 2453 | Register result_end, |
| 2454 | Register scratch, |
| 2455 | Label* gc_required, |
| 2456 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2457 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2458 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2459 | |
| 2460 | // Calculate new top and bail out if new space is exhausted. |
| 2461 | ExternalReference new_space_allocation_limit = |
| 2462 | ExternalReference::new_space_allocation_limit_address(); |
| 2463 | if (!object_size.is(result_end)) { |
| 2464 | movq(result_end, object_size); |
| 2465 | } |
| 2466 | addq(result_end, result); |
| 2467 | movq(kScratchRegister, new_space_allocation_limit); |
| 2468 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2469 | j(above, gc_required); |
| 2470 | |
| 2471 | // Update allocation top. |
| 2472 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2473 | |
| 2474 | // Tag the result if requested. |
| 2475 | if ((flags & TAG_OBJECT) != 0) { |
| 2476 | addq(result, Immediate(kHeapObjectTag)); |
| 2477 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2478 | } |
| 2479 | |
| 2480 | |
| 2481 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 2482 | ExternalReference new_space_allocation_top = |
| 2483 | ExternalReference::new_space_allocation_top_address(); |
| 2484 | |
| 2485 | // Make sure the object has no tag before resetting top. |
| 2486 | and_(object, Immediate(~kHeapObjectTagMask)); |
| 2487 | movq(kScratchRegister, new_space_allocation_top); |
| 2488 | #ifdef DEBUG |
| 2489 | cmpq(object, Operand(kScratchRegister, 0)); |
| 2490 | Check(below, "Undo allocation of non allocated memory"); |
| 2491 | #endif |
| 2492 | movq(Operand(kScratchRegister, 0), object); |
| 2493 | } |
| 2494 | |
| 2495 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2496 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 2497 | Register scratch, |
| 2498 | Label* gc_required) { |
| 2499 | // Allocate heap number in new space. |
| 2500 | AllocateInNewSpace(HeapNumber::kSize, |
| 2501 | result, |
| 2502 | scratch, |
| 2503 | no_reg, |
| 2504 | gc_required, |
| 2505 | TAG_OBJECT); |
| 2506 | |
| 2507 | // Set the map. |
| 2508 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 2509 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2510 | } |
| 2511 | |
| 2512 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2513 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 2514 | Register length, |
| 2515 | Register scratch1, |
| 2516 | Register scratch2, |
| 2517 | Register scratch3, |
| 2518 | Label* gc_required) { |
| 2519 | // Calculate the number of bytes needed for the characters in the string while |
| 2520 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2521 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 2522 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2523 | ASSERT(kShortSize == 2); |
| 2524 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2525 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 2526 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2527 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2528 | if (kHeaderAlignment > 0) { |
| 2529 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2530 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2531 | |
| 2532 | // Allocate two byte string in new space. |
| 2533 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 2534 | times_1, |
| 2535 | scratch1, |
| 2536 | result, |
| 2537 | scratch2, |
| 2538 | scratch3, |
| 2539 | gc_required, |
| 2540 | TAG_OBJECT); |
| 2541 | |
| 2542 | // Set the map, length and hash field. |
| 2543 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 2544 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2545 | Integer32ToSmi(scratch1, length); |
| 2546 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2547 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2548 | Immediate(String::kEmptyHashField)); |
| 2549 | } |
| 2550 | |
| 2551 | |
| 2552 | void MacroAssembler::AllocateAsciiString(Register result, |
| 2553 | Register length, |
| 2554 | Register scratch1, |
| 2555 | Register scratch2, |
| 2556 | Register scratch3, |
| 2557 | Label* gc_required) { |
| 2558 | // Calculate the number of bytes needed for the characters in the string while |
| 2559 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2560 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 2561 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2562 | movl(scratch1, length); |
| 2563 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2564 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2565 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2566 | if (kHeaderAlignment > 0) { |
| 2567 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2568 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2569 | |
| 2570 | // Allocate ascii string in new space. |
| 2571 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 2572 | times_1, |
| 2573 | scratch1, |
| 2574 | result, |
| 2575 | scratch2, |
| 2576 | scratch3, |
| 2577 | gc_required, |
| 2578 | TAG_OBJECT); |
| 2579 | |
| 2580 | // Set the map, length and hash field. |
| 2581 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 2582 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2583 | Integer32ToSmi(scratch1, length); |
| 2584 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2585 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2586 | Immediate(String::kEmptyHashField)); |
| 2587 | } |
| 2588 | |
| 2589 | |
| 2590 | void MacroAssembler::AllocateConsString(Register result, |
| 2591 | Register scratch1, |
| 2592 | Register scratch2, |
| 2593 | Label* gc_required) { |
| 2594 | // Allocate heap number in new space. |
| 2595 | AllocateInNewSpace(ConsString::kSize, |
| 2596 | result, |
| 2597 | scratch1, |
| 2598 | scratch2, |
| 2599 | gc_required, |
| 2600 | TAG_OBJECT); |
| 2601 | |
| 2602 | // Set the map. The other fields are left uninitialized. |
| 2603 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 2604 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2605 | } |
| 2606 | |
| 2607 | |
| 2608 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 2609 | Register scratch1, |
| 2610 | Register scratch2, |
| 2611 | Label* gc_required) { |
| 2612 | // Allocate heap number in new space. |
| 2613 | AllocateInNewSpace(ConsString::kSize, |
| 2614 | result, |
| 2615 | scratch1, |
| 2616 | scratch2, |
| 2617 | gc_required, |
| 2618 | TAG_OBJECT); |
| 2619 | |
| 2620 | // Set the map. The other fields are left uninitialized. |
| 2621 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 2622 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2623 | } |
| 2624 | |
| 2625 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2626 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2627 | if (context_chain_length > 0) { |
| 2628 | // Move up the chain of contexts to the context containing the slot. |
| 2629 | movq(dst, Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2630 | // Load the function context (which is the incoming, outer context). |
lrn@chromium.org | d5649e3 | 2010-01-19 13:36:12 +0000 | [diff] [blame] | 2631 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2632 | for (int i = 1; i < context_chain_length; i++) { |
| 2633 | movq(dst, Operand(dst, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2634 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
| 2635 | } |
| 2636 | // The context may be an intermediate context, not a function context. |
| 2637 | movq(dst, Operand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2638 | } else { // context is the current function context. |
| 2639 | // The context may be an intermediate context, not a function context. |
| 2640 | movq(dst, Operand(rsi, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2641 | } |
| 2642 | } |
| 2643 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2644 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2645 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2646 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 2647 | // including the ones passed in registers, and space is always allocated for |
| 2648 | // the four register arguments even if the function takes fewer than four |
| 2649 | // arguments. |
| 2650 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 2651 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2652 | ASSERT(num_arguments >= 0); |
| 2653 | #ifdef _WIN64 |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2654 | static const int kMinimumStackSlots = 4; |
| 2655 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 2656 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2657 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2658 | static const int kRegisterPassedArguments = 6; |
| 2659 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 2660 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2661 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2662 | } |
| 2663 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame^] | 2664 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2665 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 2666 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 2667 | ASSERT(frame_alignment != 0); |
| 2668 | ASSERT(num_arguments >= 0); |
| 2669 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 2670 | movq(kScratchRegister, rsp); |
| 2671 | ASSERT(IsPowerOf2(frame_alignment)); |
| 2672 | int argument_slots_on_stack = |
| 2673 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2674 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 2675 | and_(rsp, Immediate(-frame_alignment)); |
| 2676 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 2677 | } |
| 2678 | |
| 2679 | |
| 2680 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 2681 | int num_arguments) { |
| 2682 | movq(rax, function); |
| 2683 | CallCFunction(rax, num_arguments); |
| 2684 | } |
| 2685 | |
| 2686 | |
| 2687 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2688 | // Check stack alignment. |
| 2689 | if (FLAG_debug_code) { |
| 2690 | CheckStackAlignment(); |
| 2691 | } |
| 2692 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2693 | call(function); |
| 2694 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 2695 | ASSERT(num_arguments >= 0); |
| 2696 | int argument_slots_on_stack = |
| 2697 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2698 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 2699 | } |
| 2700 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2701 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2702 | CodePatcher::CodePatcher(byte* address, int size) |
| 2703 | : address_(address), size_(size), masm_(address, size + Assembler::kGap) { |
| 2704 | // Create a new macro assembler pointing to the address of the code to patch. |
| 2705 | // The size is adjusted with kGap on order for the assembler to generate size |
| 2706 | // bytes of instructions without failing with buffer size constraints. |
| 2707 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2708 | } |
| 2709 | |
| 2710 | |
| 2711 | CodePatcher::~CodePatcher() { |
| 2712 | // Indicate that code has changed. |
| 2713 | CPU::FlushICache(address_, size_); |
| 2714 | |
| 2715 | // Check that the code was patched as expected. |
| 2716 | ASSERT(masm_.pc_ == address_ + size_); |
| 2717 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2718 | } |
| 2719 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2720 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2721 | |
| 2722 | #endif // V8_TARGET_ARCH_X64 |