fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 28 | #include "v8.h" |
| 29 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 30 | #if defined(V8_TARGET_ARCH_X64) |
| 31 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 32 | #include "bootstrapper.h" |
| 33 | #include "codegen-inl.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 34 | #include "assembler-x64.h" |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 35 | #include "macro-assembler-x64.h" |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 36 | #include "serialize.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 37 | #include "debug.h" |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 38 | #include "heap.h" |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 39 | |
| 40 | namespace v8 { |
| 41 | namespace internal { |
| 42 | |
| 43 | MacroAssembler::MacroAssembler(void* buffer, int size) |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 44 | : Assembler(buffer, size), |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 45 | generating_stub_(false), |
| 46 | allow_stub_calls_(true), |
| 47 | code_object_(Heap::undefined_value()) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 48 | } |
| 49 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 50 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 51 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 52 | movq(destination, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | |
sgjesse@chromium.org | 720dc0b | 2010-05-10 09:25:39 +0000 | [diff] [blame] | 56 | void MacroAssembler::StoreRoot(Register source, Heap::RootListIndex index) { |
| 57 | movq(Operand(kRootRegister, index << kPointerSizeLog2), source); |
| 58 | } |
| 59 | |
| 60 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 61 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 62 | push(Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 66 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
whesse@chromium.org | b6e43bb | 2010-04-14 09:36:28 +0000 | [diff] [blame] | 67 | cmpq(with, Operand(kRootRegister, index << kPointerSizeLog2)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 68 | } |
| 69 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 70 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 71 | void MacroAssembler::CompareRoot(Operand with, Heap::RootListIndex index) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 72 | LoadRoot(kScratchRegister, index); |
| 73 | cmpq(with, kScratchRegister); |
| 74 | } |
| 75 | |
| 76 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 77 | void MacroAssembler::StackLimitCheck(Label* on_stack_overflow) { |
| 78 | CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| 79 | j(below, on_stack_overflow); |
| 80 | } |
| 81 | |
| 82 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 83 | void MacroAssembler::RecordWriteHelper(Register object, |
| 84 | Register addr, |
| 85 | Register scratch) { |
| 86 | if (FLAG_debug_code) { |
| 87 | // Check that the object is not in new space. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 88 | NearLabel not_in_new_space; |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 89 | InNewSpace(object, scratch, not_equal, ¬_in_new_space); |
| 90 | Abort("new-space object passed to RecordWriteHelper"); |
| 91 | bind(¬_in_new_space); |
| 92 | } |
| 93 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 94 | // Compute the page start address from the heap object pointer, and reuse |
| 95 | // the 'object' register for it. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 96 | and_(object, Immediate(~Page::kPageAlignmentMask)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 97 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 98 | // Compute number of region covering addr. See Page::GetRegionNumberForAddress |
| 99 | // method for more details. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 100 | shrl(addr, Immediate(Page::kRegionSizeLog2)); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 101 | andl(addr, Immediate(Page::kPageAlignmentMask >> Page::kRegionSizeLog2)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 102 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 103 | // Set dirty mark for region. |
| 104 | bts(Operand(object, Page::kDirtyFlagOffset), addr); |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 108 | void MacroAssembler::RecordWrite(Register object, |
| 109 | int offset, |
| 110 | Register value, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 111 | Register index) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 112 | // The compiled code assumes that record write doesn't change the |
| 113 | // context register, so we check that none of the clobbered |
| 114 | // registers are rsi. |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 115 | ASSERT(!object.is(rsi) && !value.is(rsi) && !index.is(rsi)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 116 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 117 | // First, check if a write barrier is even needed. The tests below |
| 118 | // catch stores of Smis and stores into young gen. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 119 | Label done; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 120 | JumpIfSmi(value, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 121 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 122 | RecordWriteNonSmi(object, offset, value, index); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 123 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 124 | |
| 125 | // Clobber all input registers when running with the debug-code flag |
| 126 | // turned on to provoke errors. This clobbering repeats the |
| 127 | // clobbering done inside RecordWriteNonSmi but it's necessary to |
| 128 | // avoid having the fast case for smis leave the registers |
| 129 | // unchanged. |
| 130 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 131 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 132 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 133 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 134 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 138 | void MacroAssembler::RecordWrite(Register object, |
| 139 | Register address, |
| 140 | Register value) { |
| 141 | // The compiled code assumes that record write doesn't change the |
| 142 | // context register, so we check that none of the clobbered |
| 143 | // registers are esi. |
| 144 | ASSERT(!object.is(rsi) && !value.is(rsi) && !address.is(rsi)); |
| 145 | |
| 146 | // First, check if a write barrier is even needed. The tests below |
| 147 | // catch stores of Smis and stores into young gen. |
| 148 | Label done; |
| 149 | JumpIfSmi(value, &done); |
| 150 | |
| 151 | InNewSpace(object, value, equal, &done); |
| 152 | |
| 153 | RecordWriteHelper(object, address, value); |
| 154 | |
| 155 | bind(&done); |
| 156 | |
| 157 | // Clobber all input registers when running with the debug-code flag |
| 158 | // turned on to provoke errors. |
| 159 | if (FLAG_debug_code) { |
| 160 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 161 | movq(address, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 162 | movq(value, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 167 | void MacroAssembler::RecordWriteNonSmi(Register object, |
| 168 | int offset, |
| 169 | Register scratch, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 170 | Register index) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 171 | Label done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 172 | |
| 173 | if (FLAG_debug_code) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 174 | NearLabel okay; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 175 | JumpIfNotSmi(object, &okay); |
| 176 | Abort("MacroAssembler::RecordWriteNonSmi cannot deal with smis"); |
| 177 | bind(&okay); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 178 | |
| 179 | if (offset == 0) { |
| 180 | // index must be int32. |
| 181 | Register tmp = index.is(rax) ? rbx : rax; |
| 182 | push(tmp); |
| 183 | movl(tmp, index); |
| 184 | cmpq(tmp, index); |
| 185 | Check(equal, "Index register for RecordWrite must be untagged int32."); |
| 186 | pop(tmp); |
| 187 | } |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 188 | } |
| 189 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 190 | // Test that the object address is not in the new space. We cannot |
| 191 | // update page dirty marks for new space pages. |
kmillikin@chromium.org | 4111b80 | 2010-05-03 10:34:42 +0000 | [diff] [blame] | 192 | InNewSpace(object, scratch, equal, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 193 | |
whesse@chromium.org | e88a9ed | 2010-04-15 15:07:46 +0000 | [diff] [blame] | 194 | // The offset is relative to a tagged or untagged HeapObject pointer, |
| 195 | // so either offset or offset + kHeapObjectTag must be a |
| 196 | // multiple of kPointerSize. |
| 197 | ASSERT(IsAligned(offset, kPointerSize) || |
| 198 | IsAligned(offset + kHeapObjectTag, kPointerSize)); |
| 199 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 200 | Register dst = index; |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 201 | if (offset != 0) { |
| 202 | lea(dst, Operand(object, offset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 203 | } else { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 204 | // array access: calculate the destination address in the same manner as |
| 205 | // KeyedStoreIC::GenerateGeneric. |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 206 | lea(dst, FieldOperand(object, |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 207 | index, |
| 208 | times_pointer_size, |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 209 | FixedArray::kHeaderSize)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 210 | } |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 211 | RecordWriteHelper(object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 212 | |
| 213 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 214 | |
| 215 | // Clobber all input registers when running with the debug-code flag |
| 216 | // turned on to provoke errors. |
| 217 | if (FLAG_debug_code) { |
vegorov@chromium.org | f837290 | 2010-03-15 10:26:20 +0000 | [diff] [blame] | 218 | movq(object, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
| 219 | movq(scratch, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 220 | movq(index, BitCast<int64_t>(kZapValue), RelocInfo::NONE); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 221 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 222 | } |
| 223 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 224 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
| 225 | if (FLAG_debug_code) Check(cc, msg); |
| 226 | } |
| 227 | |
| 228 | |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 229 | void MacroAssembler::AssertFastElements(Register elements) { |
| 230 | if (FLAG_debug_code) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 231 | NearLabel ok; |
ricow@chromium.org | 0b9f850 | 2010-08-18 07:45:01 +0000 | [diff] [blame] | 232 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 233 | Heap::kFixedArrayMapRootIndex); |
| 234 | j(equal, &ok); |
| 235 | CompareRoot(FieldOperand(elements, HeapObject::kMapOffset), |
| 236 | Heap::kFixedCOWArrayMapRootIndex); |
| 237 | j(equal, &ok); |
| 238 | Abort("JSObject with fast elements map has slow elements"); |
| 239 | bind(&ok); |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 244 | void MacroAssembler::Check(Condition cc, const char* msg) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 245 | NearLabel L; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 246 | j(cc, &L); |
| 247 | Abort(msg); |
| 248 | // will not return here |
| 249 | bind(&L); |
| 250 | } |
| 251 | |
| 252 | |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 253 | void MacroAssembler::CheckStackAlignment() { |
| 254 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 255 | int frame_alignment_mask = frame_alignment - 1; |
| 256 | if (frame_alignment > kPointerSize) { |
| 257 | ASSERT(IsPowerOf2(frame_alignment)); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 258 | NearLabel alignment_as_expected; |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 259 | testq(rsp, Immediate(frame_alignment_mask)); |
| 260 | j(zero, &alignment_as_expected); |
| 261 | // Abort if stack is not aligned. |
| 262 | int3(); |
| 263 | bind(&alignment_as_expected); |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 268 | void MacroAssembler::NegativeZeroTest(Register result, |
| 269 | Register op, |
| 270 | Label* then_label) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 271 | NearLabel ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 272 | testl(result, result); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 273 | j(not_zero, &ok); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 274 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 275 | j(sign, then_label); |
| 276 | bind(&ok); |
| 277 | } |
| 278 | |
| 279 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 280 | void MacroAssembler::Abort(const char* msg) { |
| 281 | // We want to pass the msg string like a smi to avoid GC |
| 282 | // problems, however msg is not guaranteed to be aligned |
| 283 | // properly. Instead, we pass an aligned pointer that is |
| 284 | // a proper v8 smi, but also pass the alignment difference |
| 285 | // from the real pointer as a smi. |
| 286 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 287 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 288 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 289 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 290 | #ifdef DEBUG |
| 291 | if (msg != NULL) { |
| 292 | RecordComment("Abort message: "); |
| 293 | RecordComment(msg); |
| 294 | } |
| 295 | #endif |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 296 | // Disable stub call restrictions to always allow calls to abort. |
| 297 | set_allow_stub_calls(true); |
| 298 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 299 | push(rax); |
| 300 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 301 | push(kScratchRegister); |
| 302 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 303 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 304 | RelocInfo::NONE); |
| 305 | push(kScratchRegister); |
| 306 | CallRuntime(Runtime::kAbort, 2); |
| 307 | // will not return here |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 308 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | |
| 312 | void MacroAssembler::CallStub(CodeStub* stub) { |
| 313 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 314 | Call(stub->GetCode(), RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 318 | MaybeObject* MacroAssembler::TryCallStub(CodeStub* stub) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 319 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 320 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 321 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 322 | call(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 323 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 324 | } |
| 325 | return result; |
| 326 | } |
| 327 | |
| 328 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 329 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 330 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 331 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 332 | } |
| 333 | |
| 334 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 335 | MaybeObject* MacroAssembler::TryTailCallStub(CodeStub* stub) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 336 | ASSERT(allow_stub_calls()); // Calls are not allowed in some stubs. |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 337 | MaybeObject* result = stub->TryGetCode(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 338 | if (!result->IsFailure()) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 339 | jmp(Handle<Code>(Code::cast(result->ToObjectUnchecked())), |
| 340 | RelocInfo::CODE_TARGET); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 341 | } |
| 342 | return result; |
| 343 | } |
| 344 | |
| 345 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 346 | void MacroAssembler::StubReturn(int argc) { |
| 347 | ASSERT(argc >= 1 && generating_stub()); |
| 348 | ret((argc - 1) * kPointerSize); |
| 349 | } |
| 350 | |
| 351 | |
| 352 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 353 | if (num_arguments > 0) { |
| 354 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 355 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 356 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 360 | void MacroAssembler::IndexFromHash(Register hash, Register index) { |
| 361 | // The assert checks that the constants for the maximum number of digits |
| 362 | // for an array index cached in the hash field and the number of bits |
| 363 | // reserved for it does not conflict. |
| 364 | ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| 365 | (1 << String::kArrayIndexValueBits)); |
| 366 | // We want the smi-tagged index in key. Even if we subsequently go to |
| 367 | // the slow case, converting the key to a smi is always valid. |
| 368 | // key: string key |
| 369 | // hash: key's hash field, including its array index value. |
| 370 | and_(hash, Immediate(String::kArrayIndexValueMask)); |
| 371 | shr(hash, Immediate(String::kHashShift)); |
| 372 | // Here we actually clobber the key which will be used if calling into |
| 373 | // runtime later. However as the new key is the numeric value of a string key |
| 374 | // there is no difference in using either key. |
| 375 | Integer32ToSmi(index, hash); |
| 376 | } |
| 377 | |
| 378 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 379 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 380 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 381 | } |
| 382 | |
| 383 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 384 | MaybeObject* MacroAssembler::TryCallRuntime(Runtime::FunctionId id, |
| 385 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 386 | return TryCallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 387 | } |
| 388 | |
| 389 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 390 | void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| 391 | // If the expected number of arguments of the runtime function is |
| 392 | // constant, we check that the actual number of arguments match the |
| 393 | // expectation. |
| 394 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 395 | IllegalOperation(num_arguments); |
| 396 | return; |
| 397 | } |
| 398 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 399 | // TODO(1236192): Most runtime routines don't need the number of |
| 400 | // arguments passed in because it is constant. At some point we |
| 401 | // should remove this need and make the runtime routine entry code |
| 402 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 403 | Set(rax, num_arguments); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 404 | movq(rbx, ExternalReference(f)); |
| 405 | CEntryStub ces(f->result_size); |
| 406 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 410 | MaybeObject* MacroAssembler::TryCallRuntime(Runtime::Function* f, |
| 411 | int num_arguments) { |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 412 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 413 | IllegalOperation(num_arguments); |
| 414 | // Since we did not call the stub, there was no allocation failure. |
| 415 | // Return some non-failure object. |
| 416 | return Heap::undefined_value(); |
| 417 | } |
| 418 | |
| 419 | // TODO(1236192): Most runtime routines don't need the number of |
| 420 | // arguments passed in because it is constant. At some point we |
| 421 | // should remove this need and make the runtime routine entry code |
| 422 | // smarter. |
| 423 | Set(rax, num_arguments); |
| 424 | movq(rbx, ExternalReference(f)); |
| 425 | CEntryStub ces(f->result_size); |
| 426 | return TryCallStub(&ces); |
| 427 | } |
| 428 | |
| 429 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 430 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
| 431 | int num_arguments) { |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 432 | Set(rax, num_arguments); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 433 | movq(rbx, ext); |
| 434 | |
| 435 | CEntryStub stub(1); |
| 436 | CallStub(&stub); |
| 437 | } |
| 438 | |
| 439 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 440 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 441 | int num_arguments, |
| 442 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 443 | // ----------- S t a t e ------------- |
| 444 | // -- rsp[0] : return address |
| 445 | // -- rsp[8] : argument num_arguments - 1 |
| 446 | // ... |
| 447 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 448 | // ----------------------------------- |
| 449 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 450 | // TODO(1236192): Most runtime routines don't need the number of |
| 451 | // arguments passed in because it is constant. At some point we |
| 452 | // should remove this need and make the runtime routine entry code |
| 453 | // smarter. |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 454 | Set(rax, num_arguments); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 455 | JumpToExternalReference(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 459 | MaybeObject* MacroAssembler::TryTailCallExternalReference( |
| 460 | const ExternalReference& ext, int num_arguments, int result_size) { |
| 461 | // ----------- S t a t e ------------- |
| 462 | // -- rsp[0] : return address |
| 463 | // -- rsp[8] : argument num_arguments - 1 |
| 464 | // ... |
| 465 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 466 | // ----------------------------------- |
| 467 | |
| 468 | // TODO(1236192): Most runtime routines don't need the number of |
| 469 | // arguments passed in because it is constant. At some point we |
| 470 | // should remove this need and make the runtime routine entry code |
| 471 | // smarter. |
| 472 | Set(rax, num_arguments); |
| 473 | return TryJumpToExternalReference(ext, result_size); |
| 474 | } |
| 475 | |
| 476 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 477 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 478 | int num_arguments, |
| 479 | int result_size) { |
| 480 | TailCallExternalReference(ExternalReference(fid), num_arguments, result_size); |
| 481 | } |
| 482 | |
| 483 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 484 | MaybeObject* MacroAssembler::TryTailCallRuntime(Runtime::FunctionId fid, |
| 485 | int num_arguments, |
| 486 | int result_size) { |
| 487 | return TryTailCallExternalReference(ExternalReference(fid), |
| 488 | num_arguments, |
| 489 | result_size); |
| 490 | } |
| 491 | |
| 492 | |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 493 | static int Offset(ExternalReference ref0, ExternalReference ref1) { |
| 494 | int64_t offset = (ref0.address() - ref1.address()); |
| 495 | // Check that fits into int. |
| 496 | ASSERT(static_cast<int>(offset) == offset); |
| 497 | return static_cast<int>(offset); |
| 498 | } |
| 499 | |
| 500 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 501 | void MacroAssembler::PrepareCallApiFunction(int arg_stack_space) { |
| 502 | #ifdef _WIN64 |
| 503 | // We need to prepare a slot for result handle on stack and put |
| 504 | // a pointer to it into 1st arg register. |
| 505 | EnterApiExitFrame(arg_stack_space + 1); |
| 506 | |
| 507 | // rcx must be used to pass the pointer to the return value slot. |
| 508 | lea(rcx, StackSpaceOperand(arg_stack_space)); |
| 509 | #else |
| 510 | EnterApiExitFrame(arg_stack_space); |
| 511 | #endif |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 515 | MaybeObject* MacroAssembler::TryCallApiFunctionAndReturn( |
| 516 | ApiFunction* function, int stack_space) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 517 | Label empty_result; |
| 518 | Label prologue; |
| 519 | Label promote_scheduled_exception; |
| 520 | Label delete_allocated_handles; |
| 521 | Label leave_exit_frame; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 522 | Label write_back; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 523 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 524 | ExternalReference next_address = |
| 525 | ExternalReference::handle_scope_next_address(); |
| 526 | const int kNextOffset = 0; |
| 527 | const int kLimitOffset = Offset( |
| 528 | ExternalReference::handle_scope_limit_address(), |
| 529 | next_address); |
| 530 | const int kLevelOffset = Offset( |
| 531 | ExternalReference::handle_scope_level_address(), |
| 532 | next_address); |
| 533 | ExternalReference scheduled_exception_address = |
| 534 | ExternalReference::scheduled_exception_address(); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 535 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 536 | // Allocate HandleScope in callee-save registers. |
| 537 | Register prev_next_address_reg = r14; |
| 538 | Register prev_limit_reg = rbx; |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 539 | Register base_reg = r12; |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 540 | movq(base_reg, next_address); |
| 541 | movq(prev_next_address_reg, Operand(base_reg, kNextOffset)); |
| 542 | movq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 543 | addl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 544 | // Call the api function! |
| 545 | movq(rax, |
| 546 | reinterpret_cast<int64_t>(function->address()), |
| 547 | RelocInfo::RUNTIME_ENTRY); |
| 548 | call(rax); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 549 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 550 | #ifdef _WIN64 |
| 551 | // rax keeps a pointer to v8::Handle, unpack it. |
| 552 | movq(rax, Operand(rax, 0)); |
| 553 | #endif |
| 554 | // Check if the result handle holds 0. |
| 555 | testq(rax, rax); |
| 556 | j(zero, &empty_result); |
| 557 | // It was non-zero. Dereference to get the result value. |
| 558 | movq(rax, Operand(rax, 0)); |
| 559 | bind(&prologue); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 560 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 561 | // No more valid handles (the result handle was the last one). Restore |
| 562 | // previous handle scope. |
| 563 | subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
| 564 | movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
| 565 | cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
| 566 | j(not_equal, &delete_allocated_handles); |
| 567 | bind(&leave_exit_frame); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 568 | |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 569 | // Check if the function scheduled an exception. |
| 570 | movq(rsi, scheduled_exception_address); |
| 571 | Cmp(Operand(rsi, 0), Factory::the_hole_value()); |
| 572 | j(not_equal, &promote_scheduled_exception); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 573 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 574 | LeaveApiExitFrame(); |
| 575 | ret(stack_space * kPointerSize); |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 576 | |
| 577 | bind(&promote_scheduled_exception); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 578 | MaybeObject* result = TryTailCallRuntime(Runtime::kPromoteScheduledException, |
| 579 | 0, 1); |
| 580 | if (result->IsFailure()) { |
| 581 | return result; |
| 582 | } |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 583 | |
| 584 | bind(&empty_result); |
| 585 | // It was zero; the result is undefined. |
| 586 | Move(rax, Factory::undefined_value()); |
| 587 | jmp(&prologue); |
| 588 | |
| 589 | // HandleScope limit has changed. Delete allocated extensions. |
| 590 | bind(&delete_allocated_handles); |
| 591 | movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
| 592 | movq(prev_limit_reg, rax); |
| 593 | movq(rax, ExternalReference::delete_handle_scope_extensions()); |
| 594 | call(rax); |
| 595 | movq(rax, prev_limit_reg); |
| 596 | jmp(&leave_exit_frame); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 597 | |
| 598 | return result; |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 602 | void MacroAssembler::JumpToExternalReference(const ExternalReference& ext, |
| 603 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 604 | // Set the entry point and jump to the C entry runtime stub. |
| 605 | movq(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 606 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 607 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 608 | } |
| 609 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 610 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 611 | MaybeObject* MacroAssembler::TryJumpToExternalReference( |
| 612 | const ExternalReference& ext, int result_size) { |
| 613 | // Set the entry point and jump to the C entry runtime stub. |
| 614 | movq(rbx, ext); |
| 615 | CEntryStub ces(result_size); |
| 616 | return TryTailCallStub(&ces); |
| 617 | } |
| 618 | |
| 619 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 620 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| 621 | // Calls are not allowed in some stubs. |
| 622 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 623 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 624 | // Rely on the assertion to check that the number of provided |
| 625 | // arguments match the expected number of arguments. Fake a |
| 626 | // parameter count to avoid emitting code to do the check. |
| 627 | ParameterCount expected(0); |
| 628 | GetBuiltinEntry(rdx, id); |
| 629 | InvokeCode(rdx, expected, expected, flag); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 630 | } |
| 631 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 632 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 633 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 634 | Builtins::JavaScript id) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 635 | // Load the builtins object into target register. |
| 636 | movq(target, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 637 | movq(target, FieldOperand(target, GlobalObject::kBuiltinsOffset)); |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 638 | movq(target, FieldOperand(target, |
| 639 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
| 640 | } |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 641 | |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 642 | |
| 643 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 644 | ASSERT(!target.is(rdi)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 645 | // Load the JavaScript builtin function from the builtins object. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 646 | GetBuiltinFunction(rdi, id); |
| 647 | movq(target, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 648 | } |
| 649 | |
| 650 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 651 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 652 | if (x == 0) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 653 | xorl(dst, dst); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 654 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 655 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 656 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 657 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 658 | } else { |
| 659 | movq(dst, x, RelocInfo::NONE); |
| 660 | } |
| 661 | } |
| 662 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 663 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 664 | if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 665 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 666 | } else { |
| 667 | movq(kScratchRegister, x, RelocInfo::NONE); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 668 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 669 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 670 | } |
| 671 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 672 | // ---------------------------------------------------------------------------- |
| 673 | // Smi tagging, untagging and tag detection. |
| 674 | |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 675 | Register MacroAssembler::GetSmiConstant(Smi* source) { |
| 676 | int value = source->value(); |
| 677 | if (value == 0) { |
| 678 | xorl(kScratchRegister, kScratchRegister); |
| 679 | return kScratchRegister; |
| 680 | } |
| 681 | if (value == 1) { |
| 682 | return kSmiConstantRegister; |
| 683 | } |
| 684 | LoadSmiConstant(kScratchRegister, source); |
| 685 | return kScratchRegister; |
| 686 | } |
| 687 | |
| 688 | void MacroAssembler::LoadSmiConstant(Register dst, Smi* source) { |
| 689 | if (FLAG_debug_code) { |
| 690 | movq(dst, |
| 691 | reinterpret_cast<uint64_t>(Smi::FromInt(kSmiConstantRegisterValue)), |
| 692 | RelocInfo::NONE); |
| 693 | cmpq(dst, kSmiConstantRegister); |
| 694 | if (allow_stub_calls()) { |
| 695 | Assert(equal, "Uninitialized kSmiConstantRegister"); |
| 696 | } else { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 697 | NearLabel ok; |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 698 | j(equal, &ok); |
| 699 | int3(); |
| 700 | bind(&ok); |
| 701 | } |
| 702 | } |
| 703 | if (source->value() == 0) { |
| 704 | xorl(dst, dst); |
| 705 | return; |
| 706 | } |
| 707 | int value = source->value(); |
| 708 | bool negative = value < 0; |
| 709 | unsigned int uvalue = negative ? -value : value; |
| 710 | |
| 711 | switch (uvalue) { |
| 712 | case 9: |
| 713 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_8, 0)); |
| 714 | break; |
| 715 | case 8: |
| 716 | xorl(dst, dst); |
| 717 | lea(dst, Operand(dst, kSmiConstantRegister, times_8, 0)); |
| 718 | break; |
| 719 | case 4: |
| 720 | xorl(dst, dst); |
| 721 | lea(dst, Operand(dst, kSmiConstantRegister, times_4, 0)); |
| 722 | break; |
| 723 | case 5: |
| 724 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_4, 0)); |
| 725 | break; |
| 726 | case 3: |
| 727 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_2, 0)); |
| 728 | break; |
| 729 | case 2: |
| 730 | lea(dst, Operand(kSmiConstantRegister, kSmiConstantRegister, times_1, 0)); |
| 731 | break; |
| 732 | case 1: |
| 733 | movq(dst, kSmiConstantRegister); |
| 734 | break; |
| 735 | case 0: |
| 736 | UNREACHABLE(); |
| 737 | return; |
| 738 | default: |
| 739 | movq(dst, reinterpret_cast<uint64_t>(source), RelocInfo::NONE); |
| 740 | return; |
| 741 | } |
| 742 | if (negative) { |
| 743 | neg(dst); |
| 744 | } |
| 745 | } |
| 746 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 747 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 748 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 749 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 750 | if (!dst.is(src)) { |
| 751 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 752 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 753 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 754 | } |
| 755 | |
| 756 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 757 | void MacroAssembler::Integer32ToSmiField(const Operand& dst, Register src) { |
| 758 | if (FLAG_debug_code) { |
| 759 | testb(dst, Immediate(0x01)); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 760 | NearLabel ok; |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 761 | j(zero, &ok); |
| 762 | if (allow_stub_calls()) { |
| 763 | Abort("Integer32ToSmiField writing to non-smi location"); |
| 764 | } else { |
| 765 | int3(); |
| 766 | } |
| 767 | bind(&ok); |
| 768 | } |
| 769 | ASSERT(kSmiShift % kBitsPerByte == 0); |
| 770 | movl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 771 | } |
| 772 | |
| 773 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 774 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 775 | Register src, |
| 776 | int constant) { |
| 777 | if (dst.is(src)) { |
| 778 | addq(dst, Immediate(constant)); |
| 779 | } else { |
| 780 | lea(dst, Operand(src, constant)); |
| 781 | } |
| 782 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | |
| 786 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 787 | ASSERT_EQ(0, kSmiTag); |
| 788 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 789 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 790 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 791 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 795 | void MacroAssembler::SmiToInteger32(Register dst, const Operand& src) { |
| 796 | movl(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 797 | } |
| 798 | |
| 799 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 800 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 801 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 802 | if (!dst.is(src)) { |
| 803 | movq(dst, src); |
| 804 | } |
| 805 | sar(dst, Immediate(kSmiShift)); |
| 806 | } |
| 807 | |
| 808 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 809 | void MacroAssembler::SmiToInteger64(Register dst, const Operand& src) { |
| 810 | movsxlq(dst, Operand(src, kSmiShift / kBitsPerByte)); |
| 811 | } |
| 812 | |
| 813 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 814 | void MacroAssembler::SmiTest(Register src) { |
| 815 | testq(src, src); |
| 816 | } |
| 817 | |
| 818 | |
| 819 | void MacroAssembler::SmiCompare(Register dst, Register src) { |
| 820 | cmpq(dst, src); |
| 821 | } |
| 822 | |
| 823 | |
| 824 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
| 825 | ASSERT(!dst.is(kScratchRegister)); |
| 826 | if (src->value() == 0) { |
| 827 | testq(dst, dst); |
| 828 | } else { |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 829 | Register constant_reg = GetSmiConstant(src); |
| 830 | cmpq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 831 | } |
| 832 | } |
| 833 | |
| 834 | |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 835 | void MacroAssembler::SmiCompare(Register dst, const Operand& src) { |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 836 | cmpq(dst, src); |
| 837 | } |
| 838 | |
| 839 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 840 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
| 841 | cmpq(dst, src); |
| 842 | } |
| 843 | |
| 844 | |
| 845 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 846 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(src->value())); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 847 | } |
| 848 | |
| 849 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 850 | void MacroAssembler::SmiCompareInteger32(const Operand& dst, Register src) { |
| 851 | cmpl(Operand(dst, kSmiShift / kBitsPerByte), src); |
| 852 | } |
| 853 | |
| 854 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 855 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 856 | Register src, |
| 857 | int power) { |
| 858 | ASSERT(power >= 0); |
| 859 | ASSERT(power < 64); |
| 860 | if (power == 0) { |
| 861 | SmiToInteger64(dst, src); |
| 862 | return; |
| 863 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 864 | if (!dst.is(src)) { |
| 865 | movq(dst, src); |
| 866 | } |
| 867 | if (power < kSmiShift) { |
| 868 | sar(dst, Immediate(kSmiShift - power)); |
| 869 | } else if (power > kSmiShift) { |
| 870 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 871 | } |
| 872 | } |
| 873 | |
| 874 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 875 | void MacroAssembler::PositiveSmiDivPowerOfTwoToInteger32(Register dst, |
| 876 | Register src, |
| 877 | int power) { |
| 878 | ASSERT((0 <= power) && (power < 32)); |
| 879 | if (dst.is(src)) { |
| 880 | shr(dst, Immediate(power + kSmiShift)); |
| 881 | } else { |
| 882 | UNIMPLEMENTED(); // Not used. |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 887 | Condition MacroAssembler::CheckSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 888 | ASSERT_EQ(0, kSmiTag); |
| 889 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 890 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 894 | Condition MacroAssembler::CheckNonNegativeSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 895 | ASSERT_EQ(0, kSmiTag); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 896 | // Make mask 0x8000000000000001 and test that both bits are zero. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 897 | movq(kScratchRegister, src); |
| 898 | rol(kScratchRegister, Immediate(1)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 899 | testb(kScratchRegister, Immediate(3)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 900 | return zero; |
| 901 | } |
| 902 | |
| 903 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 904 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 905 | if (first.is(second)) { |
| 906 | return CheckSmi(first); |
| 907 | } |
lrn@chromium.org | 32d961d | 2010-06-30 09:09:34 +0000 | [diff] [blame] | 908 | ASSERT(kSmiTag == 0 && kHeapObjectTag == 1 && kHeapObjectTagMask == 3); |
| 909 | leal(kScratchRegister, Operand(first, second, times_1, 0)); |
| 910 | testb(kScratchRegister, Immediate(0x03)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 911 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 915 | Condition MacroAssembler::CheckBothNonNegativeSmi(Register first, |
| 916 | Register second) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 917 | if (first.is(second)) { |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 918 | return CheckNonNegativeSmi(first); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 919 | } |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 920 | movq(kScratchRegister, first); |
| 921 | or_(kScratchRegister, second); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 922 | rol(kScratchRegister, Immediate(1)); |
ricow@chromium.org | eb7c144 | 2010-10-04 08:54:21 +0000 | [diff] [blame] | 923 | testl(kScratchRegister, Immediate(3)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 924 | return zero; |
| 925 | } |
| 926 | |
| 927 | |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 928 | Condition MacroAssembler::CheckEitherSmi(Register first, |
| 929 | Register second, |
| 930 | Register scratch) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 931 | if (first.is(second)) { |
| 932 | return CheckSmi(first); |
| 933 | } |
lrn@chromium.org | c4e51ac | 2010-08-09 09:47:21 +0000 | [diff] [blame] | 934 | if (scratch.is(second)) { |
| 935 | andl(scratch, first); |
| 936 | } else { |
| 937 | if (!scratch.is(first)) { |
| 938 | movl(scratch, first); |
| 939 | } |
| 940 | andl(scratch, second); |
| 941 | } |
| 942 | testb(scratch, Immediate(kSmiTagMask)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 943 | return zero; |
| 944 | } |
| 945 | |
| 946 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 947 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 948 | ASSERT(!src.is(kScratchRegister)); |
| 949 | // If we overflow by subtracting one, it's the minimal smi value. |
| 950 | cmpq(src, kSmiConstantRegister); |
| 951 | return overflow; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 952 | } |
| 953 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 954 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 955 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 956 | // A 32-bit integer value can always be converted to a smi. |
| 957 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 961 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 962 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 963 | // is not set. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 964 | testl(src, src); |
| 965 | return positive; |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 969 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 970 | if (constant->value() == 0) { |
| 971 | if (!dst.is(src)) { |
| 972 | movq(dst, src); |
| 973 | } |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 974 | return; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 975 | } else if (dst.is(src)) { |
| 976 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 977 | switch (constant->value()) { |
| 978 | case 1: |
| 979 | addq(dst, kSmiConstantRegister); |
| 980 | return; |
| 981 | case 2: |
| 982 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 983 | return; |
| 984 | case 4: |
| 985 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 986 | return; |
| 987 | case 8: |
| 988 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 989 | return; |
| 990 | default: |
| 991 | Register constant_reg = GetSmiConstant(constant); |
| 992 | addq(dst, constant_reg); |
| 993 | return; |
| 994 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 995 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 996 | switch (constant->value()) { |
| 997 | case 1: |
| 998 | lea(dst, Operand(src, kSmiConstantRegister, times_1, 0)); |
| 999 | return; |
| 1000 | case 2: |
| 1001 | lea(dst, Operand(src, kSmiConstantRegister, times_2, 0)); |
| 1002 | return; |
| 1003 | case 4: |
| 1004 | lea(dst, Operand(src, kSmiConstantRegister, times_4, 0)); |
| 1005 | return; |
| 1006 | case 8: |
| 1007 | lea(dst, Operand(src, kSmiConstantRegister, times_8, 0)); |
| 1008 | return; |
| 1009 | default: |
| 1010 | LoadSmiConstant(dst, constant); |
| 1011 | addq(dst, src); |
| 1012 | return; |
| 1013 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1018 | void MacroAssembler::SmiAddConstant(const Operand& dst, Smi* constant) { |
| 1019 | if (constant->value() != 0) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 1020 | addl(Operand(dst, kSmiShift / kBitsPerByte), Immediate(constant->value())); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1021 | } |
| 1022 | } |
| 1023 | |
| 1024 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1025 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 1026 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1027 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1028 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1029 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1030 | } else if (dst.is(src)) { |
| 1031 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1032 | Register constant_reg = GetSmiConstant(constant); |
| 1033 | subq(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1034 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1035 | if (constant->value() == Smi::kMinValue) { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1036 | LoadSmiConstant(dst, constant); |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1037 | // Adding and subtracting the min-value gives the same result, it only |
| 1038 | // differs on the overflow bit, which we don't check here. |
| 1039 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1040 | } else { |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1041 | // Subtract by adding the negation. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1042 | LoadSmiConstant(dst, Smi::FromInt(-constant->value())); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1043 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1044 | } |
| 1045 | } |
| 1046 | } |
| 1047 | |
| 1048 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1049 | void MacroAssembler::SmiAdd(Register dst, |
| 1050 | Register src1, |
| 1051 | Register src2) { |
| 1052 | // No overflow checking. Use only when it's known that |
| 1053 | // overflowing is impossible. |
| 1054 | ASSERT(!dst.is(src2)); |
| 1055 | if (dst.is(src1)) { |
| 1056 | addq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1057 | } else { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1058 | movq(dst, src1); |
| 1059 | addq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1060 | } |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1061 | Assert(no_overflow, "Smi addition overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1065 | void MacroAssembler::SmiSub(Register dst, Register src1, Register src2) { |
| 1066 | // No overflow checking. Use only when it's known that |
| 1067 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1068 | ASSERT(!dst.is(src2)); |
| 1069 | if (dst.is(src1)) { |
| 1070 | subq(dst, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1071 | } else { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1072 | movq(dst, src1); |
| 1073 | subq(dst, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1074 | } |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1075 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1076 | } |
| 1077 | |
| 1078 | |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1079 | void MacroAssembler::SmiSub(Register dst, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1080 | Register src1, |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1081 | const Operand& src2) { |
| 1082 | // No overflow checking. Use only when it's known that |
| 1083 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 1084 | if (dst.is(src1)) { |
| 1085 | subq(dst, src2); |
| 1086 | } else { |
| 1087 | movq(dst, src1); |
| 1088 | subq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1089 | } |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1090 | Assert(no_overflow, "Smi subtraction overflow"); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1095 | ASSERT(!dst.is(kScratchRegister)); |
| 1096 | ASSERT(!src.is(kScratchRegister)); |
| 1097 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1098 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1099 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1100 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1101 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1102 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1103 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1104 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | |
| 1108 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1109 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1110 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1111 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1112 | } |
| 1113 | and_(dst, src2); |
| 1114 | } |
| 1115 | |
| 1116 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1117 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1118 | if (constant->value() == 0) { |
| 1119 | xor_(dst, dst); |
| 1120 | } else if (dst.is(src)) { |
| 1121 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1122 | Register constant_reg = GetSmiConstant(constant); |
| 1123 | and_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1124 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1125 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1126 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1127 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1128 | } |
| 1129 | |
| 1130 | |
| 1131 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1132 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1133 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1134 | } |
| 1135 | or_(dst, src2); |
| 1136 | } |
| 1137 | |
| 1138 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1139 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1140 | if (dst.is(src)) { |
| 1141 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1142 | Register constant_reg = GetSmiConstant(constant); |
| 1143 | or_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1144 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1145 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1146 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1147 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1148 | } |
| 1149 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1150 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1151 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1152 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1153 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1154 | } |
| 1155 | xor_(dst, src2); |
| 1156 | } |
| 1157 | |
| 1158 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1159 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1160 | if (dst.is(src)) { |
| 1161 | ASSERT(!dst.is(kScratchRegister)); |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1162 | Register constant_reg = GetSmiConstant(constant); |
| 1163 | xor_(dst, constant_reg); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1164 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1165 | LoadSmiConstant(dst, constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1166 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1167 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1168 | } |
| 1169 | |
| 1170 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1171 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1172 | Register src, |
| 1173 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1174 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1175 | if (shift_value > 0) { |
| 1176 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1177 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1178 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1179 | } else { |
| 1180 | UNIMPLEMENTED(); // Not used. |
| 1181 | } |
| 1182 | } |
| 1183 | } |
| 1184 | |
| 1185 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 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)); |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1202 | NearLabel 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 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1214 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1215 | Register src1, |
| 1216 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1217 | ASSERT(!dst.is(kScratchRegister)); |
| 1218 | ASSERT(!src1.is(kScratchRegister)); |
| 1219 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1220 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1221 | if (src1.is(rcx)) { |
| 1222 | movq(kScratchRegister, src1); |
| 1223 | } else if (src2.is(rcx)) { |
| 1224 | movq(kScratchRegister, src2); |
| 1225 | } |
| 1226 | if (!dst.is(src1)) { |
| 1227 | movq(dst, src1); |
| 1228 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1229 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1230 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1231 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1232 | shl(dst, Immediate(kSmiShift)); |
| 1233 | if (src1.is(rcx)) { |
| 1234 | movq(src1, kScratchRegister); |
| 1235 | } else if (src2.is(rcx)) { |
| 1236 | movq(src2, kScratchRegister); |
| 1237 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1241 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 1242 | Register src, |
| 1243 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1244 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1245 | // There is a possible optimization if shift is in the range 60-63, but that |
| 1246 | // will (and must) never happen. |
| 1247 | if (!dst.is(src)) { |
| 1248 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1249 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1250 | if (shift < kSmiShift) { |
| 1251 | sar(dst, Immediate(kSmiShift - shift)); |
| 1252 | } else { |
| 1253 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1254 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1255 | return SmiIndex(dst, times_1); |
| 1256 | } |
| 1257 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1258 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 1259 | Register src, |
| 1260 | int shift) { |
| 1261 | // Register src holds a positive smi. |
| 1262 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1263 | if (!dst.is(src)) { |
| 1264 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1265 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1266 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1267 | if (shift < kSmiShift) { |
| 1268 | sar(dst, Immediate(kSmiShift - shift)); |
| 1269 | } else { |
| 1270 | shl(dst, Immediate(shift - kSmiShift)); |
| 1271 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1272 | return SmiIndex(dst, times_1); |
| 1273 | } |
| 1274 | |
| 1275 | |
whesse@chromium.org | 4a1fe7d | 2010-09-27 12:32:04 +0000 | [diff] [blame] | 1276 | void MacroAssembler::Move(Register dst, Register src) { |
| 1277 | if (!dst.is(src)) { |
| 1278 | movq(dst, src); |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | |
| 1283 | |
| 1284 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1285 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1286 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1287 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1288 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1289 | } else { |
| 1290 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | |
| 1295 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1296 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1297 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1298 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1299 | } else { |
| 1300 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1301 | movq(dst, kScratchRegister); |
| 1302 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1303 | } |
| 1304 | |
| 1305 | |
| 1306 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1307 | if (source->IsSmi()) { |
| 1308 | SmiCompare(dst, Smi::cast(*source)); |
| 1309 | } else { |
| 1310 | Move(kScratchRegister, source); |
| 1311 | cmpq(dst, kScratchRegister); |
| 1312 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1313 | } |
| 1314 | |
| 1315 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1316 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1317 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1318 | SmiCompare(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1319 | } else { |
| 1320 | ASSERT(source->IsHeapObject()); |
| 1321 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1322 | cmpq(dst, kScratchRegister); |
| 1323 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1324 | } |
| 1325 | |
| 1326 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1327 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1328 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1329 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1330 | } else { |
| 1331 | ASSERT(source->IsHeapObject()); |
| 1332 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1333 | push(kScratchRegister); |
| 1334 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1335 | } |
| 1336 | |
| 1337 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1338 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1339 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 1340 | if (is_int32(smi)) { |
| 1341 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1342 | } else { |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1343 | Register constant = GetSmiConstant(source); |
| 1344 | push(constant); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1345 | } |
| 1346 | } |
| 1347 | |
| 1348 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1349 | void MacroAssembler::Drop(int stack_elements) { |
| 1350 | if (stack_elements > 0) { |
| 1351 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 1352 | } |
| 1353 | } |
| 1354 | |
| 1355 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1356 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
kmillikin@chromium.org | 9155e25 | 2010-05-26 13:27:57 +0000 | [diff] [blame] | 1357 | testl(Operand(src, kIntSize), Immediate(source->value())); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1358 | } |
| 1359 | |
| 1360 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1361 | void MacroAssembler::Jump(ExternalReference ext) { |
| 1362 | movq(kScratchRegister, ext); |
| 1363 | jmp(kScratchRegister); |
| 1364 | } |
| 1365 | |
| 1366 | |
| 1367 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 1368 | movq(kScratchRegister, destination, rmode); |
| 1369 | jmp(kScratchRegister); |
| 1370 | } |
| 1371 | |
| 1372 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1373 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1374 | // TODO(X64): Inline this |
| 1375 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1379 | void MacroAssembler::Call(ExternalReference ext) { |
| 1380 | movq(kScratchRegister, ext); |
| 1381 | call(kScratchRegister); |
| 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| 1386 | movq(kScratchRegister, destination, rmode); |
| 1387 | call(kScratchRegister); |
| 1388 | } |
| 1389 | |
| 1390 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1391 | void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1392 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1393 | call(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1394 | } |
| 1395 | |
| 1396 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1397 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 1398 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1399 | // Adjust this code if not the case. |
| 1400 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 1401 | |
| 1402 | // The pc (return address) is already on TOS. This code pushes state, |
| 1403 | // frame pointer and current handler. Check that they are expected |
| 1404 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1405 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 1406 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1407 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1408 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 1409 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1410 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 1411 | |
| 1412 | if (try_location == IN_JAVASCRIPT) { |
| 1413 | if (type == TRY_CATCH_HANDLER) { |
| 1414 | push(Immediate(StackHandler::TRY_CATCH)); |
| 1415 | } else { |
| 1416 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 1417 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1418 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1419 | } else { |
| 1420 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1421 | // The frame pointer does not point to a JS frame so we save NULL |
| 1422 | // for rbp. We expect the code throwing an exception to check rbp |
| 1423 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1424 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1425 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1426 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1427 | // Save the current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1428 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1429 | push(Operand(kScratchRegister, 0)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1430 | // Link this handler. |
| 1431 | movq(Operand(kScratchRegister, 0), rsp); |
| 1432 | } |
| 1433 | |
| 1434 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1435 | void MacroAssembler::PopTryHandler() { |
| 1436 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 1437 | // Unlink this handler. |
| 1438 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
| 1439 | pop(Operand(kScratchRegister, 0)); |
| 1440 | // Remove the remaining fields. |
| 1441 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 1442 | } |
| 1443 | |
| 1444 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1445 | void MacroAssembler::Ret() { |
| 1446 | ret(0); |
| 1447 | } |
| 1448 | |
| 1449 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1450 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1451 | fucomip(); |
fschneider@chromium.org | 40b9da3 | 2010-06-28 11:29:21 +0000 | [diff] [blame] | 1452 | fstp(0); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1456 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 1457 | InstanceType type, |
| 1458 | Register map) { |
| 1459 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1460 | CmpInstanceType(map, type); |
| 1461 | } |
| 1462 | |
| 1463 | |
| 1464 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 1465 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 1466 | Immediate(static_cast<int8_t>(type))); |
| 1467 | } |
| 1468 | |
| 1469 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1470 | void MacroAssembler::CheckMap(Register obj, |
| 1471 | Handle<Map> map, |
| 1472 | Label* fail, |
| 1473 | bool is_heap_object) { |
| 1474 | if (!is_heap_object) { |
| 1475 | JumpIfSmi(obj, fail); |
| 1476 | } |
| 1477 | Cmp(FieldOperand(obj, HeapObject::kMapOffset), map); |
| 1478 | j(not_equal, fail); |
| 1479 | } |
| 1480 | |
| 1481 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1482 | void MacroAssembler::AbortIfNotNumber(Register object) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1483 | NearLabel ok; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1484 | Condition is_smi = CheckSmi(object); |
| 1485 | j(is_smi, &ok); |
| 1486 | Cmp(FieldOperand(object, HeapObject::kMapOffset), |
| 1487 | Factory::heap_number_map()); |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1488 | Assert(equal, "Operand not a number"); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1489 | bind(&ok); |
| 1490 | } |
| 1491 | |
| 1492 | |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1493 | void MacroAssembler::AbortIfSmi(Register object) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1494 | NearLabel ok; |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1495 | Condition is_smi = CheckSmi(object); |
| 1496 | Assert(NegateCondition(is_smi), "Operand is a smi"); |
| 1497 | } |
| 1498 | |
| 1499 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 1500 | void MacroAssembler::AbortIfNotSmi(Register object) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1501 | NearLabel ok; |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1502 | Condition is_smi = CheckSmi(object); |
ager@chromium.org | ea4f62e | 2010-08-16 16:28:43 +0000 | [diff] [blame] | 1503 | Assert(is_smi, "Operand is not a smi"); |
lrn@chromium.org | 25156de | 2010-04-06 13:10:27 +0000 | [diff] [blame] | 1504 | } |
| 1505 | |
| 1506 | |
ricow@chromium.org | 5ad5ace | 2010-06-23 09:06:43 +0000 | [diff] [blame] | 1507 | void MacroAssembler::AbortIfNotRootValue(Register src, |
| 1508 | Heap::RootListIndex root_value_index, |
| 1509 | const char* message) { |
| 1510 | ASSERT(!src.is(kScratchRegister)); |
| 1511 | LoadRoot(kScratchRegister, root_value_index); |
| 1512 | cmpq(src, kScratchRegister); |
| 1513 | Check(equal, message); |
| 1514 | } |
| 1515 | |
| 1516 | |
| 1517 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 1518 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 1519 | Register map, |
| 1520 | Register instance_type) { |
| 1521 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1522 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 1523 | ASSERT(kNotStringTag != 0); |
| 1524 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 1525 | return zero; |
| 1526 | } |
| 1527 | |
| 1528 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1529 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 1530 | Register result, |
| 1531 | Label* miss) { |
| 1532 | // Check that the receiver isn't a smi. |
| 1533 | testl(function, Immediate(kSmiTagMask)); |
| 1534 | j(zero, miss); |
| 1535 | |
| 1536 | // Check that the function really is a function. |
| 1537 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 1538 | j(not_equal, miss); |
| 1539 | |
| 1540 | // Make sure that the function has an instance prototype. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1541 | NearLabel non_instance; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1542 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 1543 | Immediate(1 << Map::kHasNonInstancePrototype)); |
| 1544 | j(not_zero, &non_instance); |
| 1545 | |
| 1546 | // Get the prototype or initial map from the function. |
| 1547 | movq(result, |
| 1548 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1549 | |
| 1550 | // If the prototype or initial map is the hole, don't return it and |
| 1551 | // simply miss the cache instead. This will allow us to allocate a |
| 1552 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1553 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1554 | j(equal, miss); |
| 1555 | |
| 1556 | // If the function does not have an initial map, we're done. |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1557 | NearLabel done; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1558 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| 1559 | j(not_equal, &done); |
| 1560 | |
| 1561 | // Get the prototype from the initial map. |
| 1562 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 1563 | jmp(&done); |
| 1564 | |
| 1565 | // Non-instance prototype: Fetch prototype from constructor field |
| 1566 | // in initial map. |
| 1567 | bind(&non_instance); |
| 1568 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 1569 | |
| 1570 | // All done. |
| 1571 | bind(&done); |
| 1572 | } |
| 1573 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1574 | |
| 1575 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 1576 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1577 | movq(kScratchRegister, ExternalReference(counter)); |
| 1578 | movl(Operand(kScratchRegister, 0), Immediate(value)); |
| 1579 | } |
| 1580 | } |
| 1581 | |
| 1582 | |
| 1583 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 1584 | ASSERT(value > 0); |
| 1585 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1586 | movq(kScratchRegister, ExternalReference(counter)); |
| 1587 | Operand operand(kScratchRegister, 0); |
| 1588 | if (value == 1) { |
| 1589 | incl(operand); |
| 1590 | } else { |
| 1591 | addl(operand, Immediate(value)); |
| 1592 | } |
| 1593 | } |
| 1594 | } |
| 1595 | |
| 1596 | |
| 1597 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 1598 | ASSERT(value > 0); |
| 1599 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1600 | movq(kScratchRegister, ExternalReference(counter)); |
| 1601 | Operand operand(kScratchRegister, 0); |
| 1602 | if (value == 1) { |
| 1603 | decl(operand); |
| 1604 | } else { |
| 1605 | subl(operand, Immediate(value)); |
| 1606 | } |
| 1607 | } |
| 1608 | } |
| 1609 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1610 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1611 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1612 | void MacroAssembler::DebugBreak() { |
| 1613 | ASSERT(allow_stub_calls()); |
| 1614 | xor_(rax, rax); // no arguments |
| 1615 | movq(rbx, ExternalReference(Runtime::kDebugBreak)); |
| 1616 | CEntryStub ces(1); |
| 1617 | Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1618 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1619 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1620 | |
| 1621 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1622 | void MacroAssembler::InvokeCode(Register code, |
| 1623 | const ParameterCount& expected, |
| 1624 | const ParameterCount& actual, |
| 1625 | InvokeFlag flag) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1626 | NearLabel done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1627 | InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| 1628 | if (flag == CALL_FUNCTION) { |
| 1629 | call(code); |
| 1630 | } else { |
| 1631 | ASSERT(flag == JUMP_FUNCTION); |
| 1632 | jmp(code); |
| 1633 | } |
| 1634 | bind(&done); |
| 1635 | } |
| 1636 | |
| 1637 | |
| 1638 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 1639 | const ParameterCount& expected, |
| 1640 | const ParameterCount& actual, |
| 1641 | RelocInfo::Mode rmode, |
| 1642 | InvokeFlag flag) { |
fschneider@chromium.org | c20610a | 2010-09-22 09:44:58 +0000 | [diff] [blame] | 1643 | NearLabel done; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1644 | Register dummy = rax; |
| 1645 | InvokePrologue(expected, actual, code, dummy, &done, flag); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1646 | if (flag == CALL_FUNCTION) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1647 | Call(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1648 | } else { |
| 1649 | ASSERT(flag == JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1650 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1651 | } |
| 1652 | bind(&done); |
| 1653 | } |
| 1654 | |
| 1655 | |
| 1656 | void MacroAssembler::InvokeFunction(Register function, |
| 1657 | const ParameterCount& actual, |
| 1658 | InvokeFlag flag) { |
| 1659 | ASSERT(function.is(rdi)); |
| 1660 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 1661 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1662 | movsxlq(rbx, |
| 1663 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1664 | // 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] | 1665 | // the executable code. |
erik.corry@gmail.com | 145eff5 | 2010-08-23 11:36:18 +0000 | [diff] [blame] | 1666 | movq(rdx, FieldOperand(rdi, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1667 | |
| 1668 | ParameterCount expected(rbx); |
| 1669 | InvokeCode(rdx, expected, actual, flag); |
| 1670 | } |
| 1671 | |
| 1672 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1673 | void MacroAssembler::InvokeFunction(JSFunction* function, |
| 1674 | const ParameterCount& actual, |
| 1675 | InvokeFlag flag) { |
| 1676 | ASSERT(function->is_compiled()); |
| 1677 | // Get the function and setup the context. |
| 1678 | Move(rdi, Handle<JSFunction>(function)); |
| 1679 | movq(rsi, FieldOperand(rdi, JSFunction::kContextOffset)); |
| 1680 | |
| 1681 | // Invoke the cached code. |
| 1682 | Handle<Code> code(function->code()); |
| 1683 | ParameterCount expected(function->shared()->formal_parameter_count()); |
| 1684 | InvokeCode(code, expected, actual, RelocInfo::CODE_TARGET, flag); |
| 1685 | } |
| 1686 | |
| 1687 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1688 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 1689 | push(rbp); |
| 1690 | movq(rbp, rsp); |
| 1691 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1692 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1693 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 1694 | push(kScratchRegister); |
| 1695 | if (FLAG_debug_code) { |
| 1696 | movq(kScratchRegister, |
| 1697 | Factory::undefined_value(), |
| 1698 | RelocInfo::EMBEDDED_OBJECT); |
| 1699 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 1700 | Check(not_equal, "code object not properly patched"); |
| 1701 | } |
| 1702 | } |
| 1703 | |
| 1704 | |
| 1705 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 1706 | if (FLAG_debug_code) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1707 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1708 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 1709 | Check(equal, "stack frame types must match"); |
| 1710 | } |
| 1711 | movq(rsp, rbp); |
| 1712 | pop(rbp); |
| 1713 | } |
| 1714 | |
| 1715 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1716 | void MacroAssembler::EnterExitFramePrologue(bool save_rax) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1717 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1718 | // 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] | 1719 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 1720 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 1721 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 1722 | push(rbp); |
| 1723 | movq(rbp, rsp); |
| 1724 | |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1725 | // Reserve room for entry stack pointer and push the code object. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1726 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1727 | push(Immediate(0)); // Saved entry sp, patched before call. |
| 1728 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 1729 | push(kScratchRegister); // Accessed from EditFrame::code_slot. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1730 | |
| 1731 | // Save the frame pointer and the context in top. |
| 1732 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 1733 | ExternalReference context_address(Top::k_context_address); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1734 | if (save_rax) { |
| 1735 | movq(r14, rax); // Backup rax before we use it. |
| 1736 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1737 | |
| 1738 | movq(rax, rbp); |
| 1739 | store_rax(c_entry_fp_address); |
| 1740 | movq(rax, rsi); |
| 1741 | store_rax(context_address); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1742 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1743 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1744 | |
| 1745 | void MacroAssembler::EnterExitFrameEpilogue(int arg_stack_space) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1746 | #ifdef _WIN64 |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1747 | const int kShaddowSpace = 4; |
| 1748 | arg_stack_space += kShaddowSpace; |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1749 | #endif |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1750 | if (arg_stack_space > 0) { |
| 1751 | subq(rsp, Immediate(arg_stack_space * kPointerSize)); |
| 1752 | } |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1753 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1754 | // Get the required frame alignment for the OS. |
| 1755 | static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| 1756 | if (kFrameAlignment > 0) { |
| 1757 | ASSERT(IsPowerOf2(kFrameAlignment)); |
| 1758 | movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| 1759 | and_(rsp, kScratchRegister); |
| 1760 | } |
| 1761 | |
| 1762 | // Patch the saved entry sp. |
| 1763 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 1764 | } |
| 1765 | |
| 1766 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1767 | void MacroAssembler::EnterExitFrame(int arg_stack_space) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1768 | EnterExitFramePrologue(true); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1769 | |
| 1770 | // Setup argv in callee-saved register r12. It is reused in LeaveExitFrame, |
| 1771 | // so it must be retained across the C-call. |
| 1772 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| 1773 | lea(r12, Operand(rbp, r14, times_pointer_size, offset)); |
| 1774 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1775 | EnterExitFrameEpilogue(arg_stack_space); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1776 | } |
| 1777 | |
| 1778 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1779 | void MacroAssembler::EnterApiExitFrame(int arg_stack_space) { |
ricow@chromium.org | d236f4d | 2010-09-01 06:52:08 +0000 | [diff] [blame] | 1780 | EnterExitFramePrologue(false); |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1781 | EnterExitFrameEpilogue(arg_stack_space); |
whesse@chromium.org | e90029b | 2010-08-02 11:52:17 +0000 | [diff] [blame] | 1782 | } |
| 1783 | |
| 1784 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1785 | void MacroAssembler::LeaveExitFrame() { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1786 | // Registers: |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1787 | // r12 : argv |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1788 | |
| 1789 | // Get the return address from the stack and restore the frame pointer. |
| 1790 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 1791 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 1792 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1793 | // Pop everything up to and including the arguments and the receiver |
| 1794 | // from the caller stack. |
kmillikin@chromium.org | 69ea396 | 2010-07-05 11:01:40 +0000 | [diff] [blame] | 1795 | lea(rsp, Operand(r12, 1 * kPointerSize)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1796 | |
erik.corry@gmail.com | 4a6c327 | 2010-11-18 12:04:40 +0000 | [diff] [blame] | 1797 | // Push the return address to get ready to return. |
| 1798 | push(rcx); |
| 1799 | |
| 1800 | LeaveExitFrameEpilogue(); |
| 1801 | } |
| 1802 | |
| 1803 | |
| 1804 | void MacroAssembler::LeaveApiExitFrame() { |
| 1805 | movq(rsp, rbp); |
| 1806 | pop(rbp); |
| 1807 | |
| 1808 | LeaveExitFrameEpilogue(); |
| 1809 | } |
| 1810 | |
| 1811 | |
| 1812 | void MacroAssembler::LeaveExitFrameEpilogue() { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1813 | // Restore current context from top and clear it in debug mode. |
| 1814 | ExternalReference context_address(Top::k_context_address); |
| 1815 | movq(kScratchRegister, context_address); |
| 1816 | movq(rsi, Operand(kScratchRegister, 0)); |
| 1817 | #ifdef DEBUG |
| 1818 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 1819 | #endif |
| 1820 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1821 | // Clear the top frame. |
| 1822 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 1823 | movq(kScratchRegister, c_entry_fp_address); |
| 1824 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 1825 | } |
| 1826 | |
| 1827 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1828 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 1829 | Register scratch, |
| 1830 | Label* miss) { |
| 1831 | Label same_contexts; |
| 1832 | |
| 1833 | ASSERT(!holder_reg.is(scratch)); |
| 1834 | ASSERT(!scratch.is(kScratchRegister)); |
| 1835 | // Load current lexical context from the stack frame. |
| 1836 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 1837 | |
| 1838 | // When generating debug code, make sure the lexical context is set. |
| 1839 | if (FLAG_debug_code) { |
| 1840 | cmpq(scratch, Immediate(0)); |
| 1841 | Check(not_equal, "we should not have an empty lexical context"); |
| 1842 | } |
| 1843 | // Load the global context of the current context. |
| 1844 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1845 | movq(scratch, FieldOperand(scratch, offset)); |
| 1846 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 1847 | |
| 1848 | // Check the context is a global context. |
| 1849 | if (FLAG_debug_code) { |
| 1850 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
| 1851 | Factory::global_context_map()); |
| 1852 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 1853 | } |
| 1854 | |
| 1855 | // Check if both contexts are the same. |
| 1856 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 1857 | j(equal, &same_contexts); |
| 1858 | |
| 1859 | // Compare security tokens. |
| 1860 | // Check that the security token in the calling global object is |
| 1861 | // compatible with the security token in the receiving global |
| 1862 | // object. |
| 1863 | |
| 1864 | // Check the context is a global context. |
| 1865 | if (FLAG_debug_code) { |
| 1866 | // Preserve original value of holder_reg. |
| 1867 | push(holder_reg); |
| 1868 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1869 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1870 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 1871 | |
| 1872 | // Read the first word and compare to global_context_map(), |
| 1873 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1874 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1875 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 1876 | pop(holder_reg); |
| 1877 | } |
| 1878 | |
| 1879 | movq(kScratchRegister, |
| 1880 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1881 | int token_offset = |
| 1882 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 1883 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 1884 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 1885 | j(not_equal, miss); |
| 1886 | |
| 1887 | bind(&same_contexts); |
| 1888 | } |
| 1889 | |
| 1890 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1891 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1892 | Register scratch, |
| 1893 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1894 | ExternalReference new_space_allocation_top = |
| 1895 | ExternalReference::new_space_allocation_top_address(); |
| 1896 | |
| 1897 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1898 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1899 | // No use of scratch if allocation top is provided. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1900 | ASSERT(!scratch.is_valid()); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1901 | #ifdef DEBUG |
| 1902 | // Assert that result actually contains top on entry. |
| 1903 | movq(kScratchRegister, new_space_allocation_top); |
| 1904 | cmpq(result, Operand(kScratchRegister, 0)); |
| 1905 | Check(equal, "Unexpected allocation top"); |
| 1906 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1907 | return; |
| 1908 | } |
| 1909 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1910 | // Move address of new object to result. Use scratch register if available, |
| 1911 | // and keep address in scratch until call to UpdateAllocationTopHelper. |
| 1912 | if (scratch.is_valid()) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1913 | movq(scratch, new_space_allocation_top); |
| 1914 | movq(result, Operand(scratch, 0)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1915 | } else if (result.is(rax)) { |
| 1916 | load_rax(new_space_allocation_top); |
| 1917 | } else { |
| 1918 | movq(kScratchRegister, new_space_allocation_top); |
| 1919 | movq(result, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1920 | } |
| 1921 | } |
| 1922 | |
| 1923 | |
| 1924 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 1925 | Register scratch) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 1926 | if (FLAG_debug_code) { |
| 1927 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 1928 | Check(zero, "Unaligned allocation in new space"); |
| 1929 | } |
| 1930 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1931 | ExternalReference new_space_allocation_top = |
| 1932 | ExternalReference::new_space_allocation_top_address(); |
| 1933 | |
| 1934 | // Update new top. |
| 1935 | if (result_end.is(rax)) { |
| 1936 | // rax can be stored directly to a memory location. |
| 1937 | store_rax(new_space_allocation_top); |
| 1938 | } else { |
| 1939 | // Register required - use scratch provided if available. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1940 | if (scratch.is_valid()) { |
| 1941 | movq(Operand(scratch, 0), result_end); |
| 1942 | } else { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1943 | movq(kScratchRegister, new_space_allocation_top); |
| 1944 | movq(Operand(kScratchRegister, 0), result_end); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1945 | } |
| 1946 | } |
| 1947 | } |
| 1948 | |
| 1949 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1950 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 1951 | Register result, |
| 1952 | Register result_end, |
| 1953 | Register scratch, |
| 1954 | Label* gc_required, |
| 1955 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 1956 | if (!FLAG_inline_new) { |
| 1957 | if (FLAG_debug_code) { |
| 1958 | // Trash the registers to simulate an allocation failure. |
| 1959 | movl(result, Immediate(0x7091)); |
| 1960 | if (result_end.is_valid()) { |
| 1961 | movl(result_end, Immediate(0x7191)); |
| 1962 | } |
| 1963 | if (scratch.is_valid()) { |
| 1964 | movl(scratch, Immediate(0x7291)); |
| 1965 | } |
| 1966 | } |
| 1967 | jmp(gc_required); |
| 1968 | return; |
| 1969 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1970 | ASSERT(!result.is(result_end)); |
| 1971 | |
| 1972 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame^] | 1973 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1974 | |
| 1975 | // Calculate new top and bail out if new space is exhausted. |
| 1976 | ExternalReference new_space_allocation_limit = |
| 1977 | ExternalReference::new_space_allocation_limit_address(); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1978 | |
| 1979 | Register top_reg = result_end.is_valid() ? result_end : result; |
| 1980 | |
| 1981 | if (top_reg.is(result)) { |
| 1982 | addq(top_reg, Immediate(object_size)); |
| 1983 | } else { |
| 1984 | lea(top_reg, Operand(result, object_size)); |
| 1985 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1986 | movq(kScratchRegister, new_space_allocation_limit); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1987 | cmpq(top_reg, Operand(kScratchRegister, 0)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1988 | j(above, gc_required); |
| 1989 | |
| 1990 | // Update allocation top. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1991 | UpdateAllocationTopHelper(top_reg, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1992 | |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 1993 | if (top_reg.is(result)) { |
| 1994 | if ((flags & TAG_OBJECT) != 0) { |
| 1995 | subq(result, Immediate(object_size - kHeapObjectTag)); |
| 1996 | } else { |
| 1997 | subq(result, Immediate(object_size)); |
| 1998 | } |
| 1999 | } else if ((flags & TAG_OBJECT) != 0) { |
| 2000 | // Tag the result if requested. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2001 | addq(result, Immediate(kHeapObjectTag)); |
| 2002 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2003 | } |
| 2004 | |
| 2005 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2006 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 2007 | ScaleFactor element_size, |
| 2008 | Register element_count, |
| 2009 | Register result, |
| 2010 | Register result_end, |
| 2011 | Register scratch, |
| 2012 | Label* gc_required, |
| 2013 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2014 | if (!FLAG_inline_new) { |
| 2015 | if (FLAG_debug_code) { |
| 2016 | // Trash the registers to simulate an allocation failure. |
| 2017 | movl(result, Immediate(0x7091)); |
| 2018 | movl(result_end, Immediate(0x7191)); |
| 2019 | if (scratch.is_valid()) { |
| 2020 | movl(scratch, Immediate(0x7291)); |
| 2021 | } |
| 2022 | // Register element_count is not modified by the function. |
| 2023 | } |
| 2024 | jmp(gc_required); |
| 2025 | return; |
| 2026 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2027 | ASSERT(!result.is(result_end)); |
| 2028 | |
| 2029 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame^] | 2030 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2031 | |
| 2032 | // Calculate new top and bail out if new space is exhausted. |
| 2033 | ExternalReference new_space_allocation_limit = |
| 2034 | ExternalReference::new_space_allocation_limit_address(); |
| 2035 | lea(result_end, Operand(result, element_count, element_size, header_size)); |
| 2036 | movq(kScratchRegister, new_space_allocation_limit); |
| 2037 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2038 | j(above, gc_required); |
| 2039 | |
| 2040 | // Update allocation top. |
| 2041 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2042 | |
| 2043 | // Tag the result if requested. |
| 2044 | if ((flags & TAG_OBJECT) != 0) { |
| 2045 | addq(result, Immediate(kHeapObjectTag)); |
| 2046 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2047 | } |
| 2048 | |
| 2049 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2050 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 2051 | Register result, |
| 2052 | Register result_end, |
| 2053 | Register scratch, |
| 2054 | Label* gc_required, |
| 2055 | AllocationFlags flags) { |
lrn@chromium.org | 303ada7 | 2010-10-27 09:33:13 +0000 | [diff] [blame] | 2056 | if (!FLAG_inline_new) { |
| 2057 | if (FLAG_debug_code) { |
| 2058 | // Trash the registers to simulate an allocation failure. |
| 2059 | movl(result, Immediate(0x7091)); |
| 2060 | movl(result_end, Immediate(0x7191)); |
| 2061 | if (scratch.is_valid()) { |
| 2062 | movl(scratch, Immediate(0x7291)); |
| 2063 | } |
| 2064 | // object_size is left unchanged by this function. |
| 2065 | } |
| 2066 | jmp(gc_required); |
| 2067 | return; |
| 2068 | } |
| 2069 | ASSERT(!result.is(result_end)); |
| 2070 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2071 | // Load address of new object into result. |
ager@chromium.org | beb2571 | 2010-11-29 08:02:25 +0000 | [diff] [blame^] | 2072 | LoadAllocationTopHelper(result, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2073 | |
| 2074 | // Calculate new top and bail out if new space is exhausted. |
| 2075 | ExternalReference new_space_allocation_limit = |
| 2076 | ExternalReference::new_space_allocation_limit_address(); |
| 2077 | if (!object_size.is(result_end)) { |
| 2078 | movq(result_end, object_size); |
| 2079 | } |
| 2080 | addq(result_end, result); |
| 2081 | movq(kScratchRegister, new_space_allocation_limit); |
| 2082 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2083 | j(above, gc_required); |
| 2084 | |
| 2085 | // Update allocation top. |
| 2086 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2087 | |
| 2088 | // Tag the result if requested. |
| 2089 | if ((flags & TAG_OBJECT) != 0) { |
| 2090 | addq(result, Immediate(kHeapObjectTag)); |
| 2091 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2092 | } |
| 2093 | |
| 2094 | |
| 2095 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 2096 | ExternalReference new_space_allocation_top = |
| 2097 | ExternalReference::new_space_allocation_top_address(); |
| 2098 | |
| 2099 | // Make sure the object has no tag before resetting top. |
| 2100 | and_(object, Immediate(~kHeapObjectTagMask)); |
| 2101 | movq(kScratchRegister, new_space_allocation_top); |
| 2102 | #ifdef DEBUG |
| 2103 | cmpq(object, Operand(kScratchRegister, 0)); |
| 2104 | Check(below, "Undo allocation of non allocated memory"); |
| 2105 | #endif |
| 2106 | movq(Operand(kScratchRegister, 0), object); |
| 2107 | } |
| 2108 | |
| 2109 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2110 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 2111 | Register scratch, |
| 2112 | Label* gc_required) { |
| 2113 | // Allocate heap number in new space. |
| 2114 | AllocateInNewSpace(HeapNumber::kSize, |
| 2115 | result, |
| 2116 | scratch, |
| 2117 | no_reg, |
| 2118 | gc_required, |
| 2119 | TAG_OBJECT); |
| 2120 | |
| 2121 | // Set the map. |
| 2122 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 2123 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2124 | } |
| 2125 | |
| 2126 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2127 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 2128 | Register length, |
| 2129 | Register scratch1, |
| 2130 | Register scratch2, |
| 2131 | Register scratch3, |
| 2132 | Label* gc_required) { |
| 2133 | // Calculate the number of bytes needed for the characters in the string while |
| 2134 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2135 | const int kHeaderAlignment = SeqTwoByteString::kHeaderSize & |
| 2136 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2137 | ASSERT(kShortSize == 2); |
| 2138 | // scratch1 = length * 2 + kObjectAlignmentMask. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2139 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask + |
| 2140 | kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2141 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2142 | if (kHeaderAlignment > 0) { |
| 2143 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2144 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2145 | |
| 2146 | // Allocate two byte string in new space. |
| 2147 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 2148 | times_1, |
| 2149 | scratch1, |
| 2150 | result, |
| 2151 | scratch2, |
| 2152 | scratch3, |
| 2153 | gc_required, |
| 2154 | TAG_OBJECT); |
| 2155 | |
| 2156 | // Set the map, length and hash field. |
| 2157 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 2158 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2159 | Integer32ToSmi(scratch1, length); |
| 2160 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2161 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2162 | Immediate(String::kEmptyHashField)); |
| 2163 | } |
| 2164 | |
| 2165 | |
| 2166 | void MacroAssembler::AllocateAsciiString(Register result, |
| 2167 | Register length, |
| 2168 | Register scratch1, |
| 2169 | Register scratch2, |
| 2170 | Register scratch3, |
| 2171 | Label* gc_required) { |
| 2172 | // Calculate the number of bytes needed for the characters in the string while |
| 2173 | // observing object alignment. |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2174 | const int kHeaderAlignment = SeqAsciiString::kHeaderSize & |
| 2175 | kObjectAlignmentMask; |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2176 | movl(scratch1, length); |
| 2177 | ASSERT(kCharSize == 1); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2178 | addq(scratch1, Immediate(kObjectAlignmentMask + kHeaderAlignment)); |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2179 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2180 | if (kHeaderAlignment > 0) { |
| 2181 | subq(scratch1, Immediate(kHeaderAlignment)); |
| 2182 | } |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2183 | |
| 2184 | // Allocate ascii string in new space. |
| 2185 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 2186 | times_1, |
| 2187 | scratch1, |
| 2188 | result, |
| 2189 | scratch2, |
| 2190 | scratch3, |
| 2191 | gc_required, |
| 2192 | TAG_OBJECT); |
| 2193 | |
| 2194 | // Set the map, length and hash field. |
| 2195 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 2196 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
ager@chromium.org | ac091b7 | 2010-05-05 07:34:42 +0000 | [diff] [blame] | 2197 | Integer32ToSmi(scratch1, length); |
| 2198 | movq(FieldOperand(result, String::kLengthOffset), scratch1); |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2199 | movq(FieldOperand(result, String::kHashFieldOffset), |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2200 | Immediate(String::kEmptyHashField)); |
| 2201 | } |
| 2202 | |
| 2203 | |
| 2204 | void MacroAssembler::AllocateConsString(Register result, |
| 2205 | Register scratch1, |
| 2206 | Register scratch2, |
| 2207 | Label* gc_required) { |
| 2208 | // Allocate heap number in new space. |
| 2209 | AllocateInNewSpace(ConsString::kSize, |
| 2210 | result, |
| 2211 | scratch1, |
| 2212 | scratch2, |
| 2213 | gc_required, |
| 2214 | TAG_OBJECT); |
| 2215 | |
| 2216 | // Set the map. The other fields are left uninitialized. |
| 2217 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 2218 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2219 | } |
| 2220 | |
| 2221 | |
| 2222 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 2223 | Register scratch1, |
| 2224 | Register scratch2, |
| 2225 | Label* gc_required) { |
| 2226 | // Allocate heap number in new space. |
| 2227 | AllocateInNewSpace(ConsString::kSize, |
| 2228 | result, |
| 2229 | scratch1, |
| 2230 | scratch2, |
| 2231 | gc_required, |
| 2232 | TAG_OBJECT); |
| 2233 | |
| 2234 | // Set the map. The other fields are left uninitialized. |
| 2235 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 2236 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2237 | } |
| 2238 | |
| 2239 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2240 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2241 | if (context_chain_length > 0) { |
| 2242 | // Move up the chain of contexts to the context containing the slot. |
| 2243 | movq(dst, Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2244 | // Load the function context (which is the incoming, outer context). |
lrn@chromium.org | d5649e3 | 2010-01-19 13:36:12 +0000 | [diff] [blame] | 2245 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2246 | for (int i = 1; i < context_chain_length; i++) { |
| 2247 | movq(dst, Operand(dst, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2248 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
| 2249 | } |
| 2250 | // The context may be an intermediate context, not a function context. |
| 2251 | movq(dst, Operand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2252 | } else { // context is the current function context. |
| 2253 | // The context may be an intermediate context, not a function context. |
| 2254 | movq(dst, Operand(rsi, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2255 | } |
| 2256 | } |
| 2257 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2258 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2259 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2260 | // On Windows 64 stack slots are reserved by the caller for all arguments |
| 2261 | // including the ones passed in registers, and space is always allocated for |
| 2262 | // the four register arguments even if the function takes fewer than four |
| 2263 | // arguments. |
| 2264 | // On AMD64 ABI (Linux/Mac) the first six arguments are passed in registers |
| 2265 | // and the caller does not reserve stack slots for them. |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2266 | ASSERT(num_arguments >= 0); |
| 2267 | #ifdef _WIN64 |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2268 | static const int kMinimumStackSlots = 4; |
| 2269 | if (num_arguments < kMinimumStackSlots) return kMinimumStackSlots; |
| 2270 | return num_arguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2271 | #else |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2272 | static const int kRegisterPassedArguments = 6; |
| 2273 | if (num_arguments < kRegisterPassedArguments) return 0; |
| 2274 | return num_arguments - kRegisterPassedArguments; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2275 | #endif |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2276 | } |
| 2277 | |
ricow@chromium.org | 30ce411 | 2010-05-31 10:38:25 +0000 | [diff] [blame] | 2278 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2279 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 2280 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 2281 | ASSERT(frame_alignment != 0); |
| 2282 | ASSERT(num_arguments >= 0); |
| 2283 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 2284 | movq(kScratchRegister, rsp); |
| 2285 | ASSERT(IsPowerOf2(frame_alignment)); |
| 2286 | int argument_slots_on_stack = |
| 2287 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2288 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 2289 | and_(rsp, Immediate(-frame_alignment)); |
| 2290 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 2291 | } |
| 2292 | |
| 2293 | |
| 2294 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 2295 | int num_arguments) { |
| 2296 | movq(rax, function); |
| 2297 | CallCFunction(rax, num_arguments); |
| 2298 | } |
| 2299 | |
| 2300 | |
| 2301 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
ricow@chromium.org | c9c8082 | 2010-04-21 08:22:37 +0000 | [diff] [blame] | 2302 | // Check stack alignment. |
| 2303 | if (FLAG_debug_code) { |
| 2304 | CheckStackAlignment(); |
| 2305 | } |
| 2306 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame] | 2307 | call(function); |
| 2308 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 2309 | ASSERT(num_arguments >= 0); |
| 2310 | int argument_slots_on_stack = |
| 2311 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2312 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 2313 | } |
| 2314 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2315 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2316 | CodePatcher::CodePatcher(byte* address, int size) |
| 2317 | : address_(address), size_(size), masm_(address, size + Assembler::kGap) { |
| 2318 | // Create a new macro assembler pointing to the address of the code to patch. |
| 2319 | // The size is adjusted with kGap on order for the assembler to generate size |
| 2320 | // bytes of instructions without failing with buffer size constraints. |
| 2321 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2322 | } |
| 2323 | |
| 2324 | |
| 2325 | CodePatcher::~CodePatcher() { |
| 2326 | // Indicate that code has changed. |
| 2327 | CPU::FlushICache(address_, size_); |
| 2328 | |
| 2329 | // Check that the code was patched as expected. |
| 2330 | ASSERT(masm_.pc_ == address_ + size_); |
| 2331 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2332 | } |
| 2333 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2334 | } } // namespace v8::internal |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 2335 | |
| 2336 | #endif // V8_TARGET_ARCH_X64 |