ager@chromium.org | 5ec4892 | 2009-05-05 07:25:34 +0000 | [diff] [blame] | 1 | // Copyright 2009 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 28 | #include "v8.h" |
| 29 | |
| 30 | #include "bootstrapper.h" |
| 31 | #include "codegen-inl.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 32 | #include "assembler-x64.h" |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 33 | #include "macro-assembler-x64.h" |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 34 | #include "serialize.h" |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 35 | #include "debug.h" |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 36 | |
| 37 | namespace v8 { |
| 38 | namespace internal { |
| 39 | |
| 40 | MacroAssembler::MacroAssembler(void* buffer, int size) |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 41 | : Assembler(buffer, size), |
| 42 | unresolved_(0), |
| 43 | generating_stub_(false), |
| 44 | allow_stub_calls_(true), |
| 45 | code_object_(Heap::undefined_value()) { |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 46 | } |
| 47 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 48 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 49 | void MacroAssembler::LoadRoot(Register destination, Heap::RootListIndex index) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 50 | movq(destination, Operand(r13, index << kPointerSizeLog2)); |
| 51 | } |
| 52 | |
| 53 | |
| 54 | void MacroAssembler::PushRoot(Heap::RootListIndex index) { |
| 55 | push(Operand(r13, index << kPointerSizeLog2)); |
| 56 | } |
| 57 | |
| 58 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 59 | void MacroAssembler::CompareRoot(Register with, Heap::RootListIndex index) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 60 | cmpq(with, Operand(r13, index << kPointerSizeLog2)); |
| 61 | } |
| 62 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 63 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 64 | void MacroAssembler::CompareRoot(Operand with, Heap::RootListIndex index) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 65 | LoadRoot(kScratchRegister, index); |
| 66 | cmpq(with, kScratchRegister); |
| 67 | } |
| 68 | |
| 69 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 70 | void MacroAssembler::StackLimitCheck(Label* on_stack_overflow) { |
| 71 | CompareRoot(rsp, Heap::kStackLimitRootIndex); |
| 72 | j(below, on_stack_overflow); |
| 73 | } |
| 74 | |
| 75 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 76 | static void RecordWriteHelper(MacroAssembler* masm, |
| 77 | Register object, |
| 78 | Register addr, |
| 79 | Register scratch) { |
| 80 | Label fast; |
| 81 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 82 | // Compute the page start address from the heap object pointer, and reuse |
| 83 | // the 'object' register for it. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 84 | ASSERT(is_int32(~Page::kPageAlignmentMask)); |
| 85 | masm->and_(object, |
| 86 | Immediate(static_cast<int32_t>(~Page::kPageAlignmentMask))); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 87 | Register page_start = object; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 88 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 89 | // Compute the bit addr in the remembered set/index of the pointer in the |
| 90 | // page. Reuse 'addr' as pointer_offset. |
| 91 | masm->subq(addr, page_start); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 92 | masm->shr(addr, Immediate(kPointerSizeLog2)); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 93 | Register pointer_offset = addr; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 94 | |
| 95 | // If the bit offset lies beyond the normal remembered set range, it is in |
| 96 | // the extra remembered set area of a large object. |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 97 | masm->cmpq(pointer_offset, Immediate(Page::kPageSize / kPointerSize)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 98 | masm->j(less, &fast); |
| 99 | |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 100 | // Adjust 'page_start' so that addressing using 'pointer_offset' hits the |
| 101 | // extra remembered set after the large object. |
| 102 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 103 | // Load the array length into 'scratch'. |
| 104 | masm->movl(scratch, |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 105 | Operand(page_start, |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 106 | Page::kObjectStartOffset + FixedArray::kLengthOffset)); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 107 | Register array_length = scratch; |
| 108 | |
| 109 | // Extra remembered set starts right after the large object (a FixedArray), at |
| 110 | // page_start + kObjectStartOffset + objectSize |
| 111 | // where objectSize is FixedArray::kHeaderSize + kPointerSize * array_length. |
| 112 | // Add the delta between the end of the normal RSet and the start of the |
| 113 | // extra RSet to 'page_start', so that addressing the bit using |
| 114 | // 'pointer_offset' hits the extra RSet words. |
| 115 | masm->lea(page_start, |
| 116 | Operand(page_start, array_length, times_pointer_size, |
| 117 | Page::kObjectStartOffset + FixedArray::kHeaderSize |
| 118 | - Page::kRSetEndOffset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 119 | |
| 120 | // NOTE: For now, we use the bit-test-and-set (bts) x86 instruction |
| 121 | // to limit code size. We should probably evaluate this decision by |
| 122 | // measuring the performance of an equivalent implementation using |
| 123 | // "simpler" instructions |
| 124 | masm->bind(&fast); |
christian.plesner.hansen@gmail.com | 5a6af92 | 2009-08-12 14:20:51 +0000 | [diff] [blame] | 125 | masm->bts(Operand(page_start, Page::kRSetOffset), pointer_offset); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | |
| 129 | class RecordWriteStub : public CodeStub { |
| 130 | public: |
| 131 | RecordWriteStub(Register object, Register addr, Register scratch) |
| 132 | : object_(object), addr_(addr), scratch_(scratch) { } |
| 133 | |
| 134 | void Generate(MacroAssembler* masm); |
| 135 | |
| 136 | private: |
| 137 | Register object_; |
| 138 | Register addr_; |
| 139 | Register scratch_; |
| 140 | |
| 141 | #ifdef DEBUG |
| 142 | void Print() { |
| 143 | PrintF("RecordWriteStub (object reg %d), (addr reg %d), (scratch reg %d)\n", |
| 144 | object_.code(), addr_.code(), scratch_.code()); |
| 145 | } |
| 146 | #endif |
| 147 | |
| 148 | // Minor key encoding in 12 bits of three registers (object, address and |
| 149 | // scratch) OOOOAAAASSSS. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 150 | class ScratchBits : public BitField<uint32_t, 0, 4> {}; |
| 151 | class AddressBits : public BitField<uint32_t, 4, 4> {}; |
| 152 | class ObjectBits : public BitField<uint32_t, 8, 4> {}; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 153 | |
| 154 | Major MajorKey() { return RecordWrite; } |
| 155 | |
| 156 | int MinorKey() { |
| 157 | // Encode the registers. |
| 158 | return ObjectBits::encode(object_.code()) | |
| 159 | AddressBits::encode(addr_.code()) | |
| 160 | ScratchBits::encode(scratch_.code()); |
| 161 | } |
| 162 | }; |
| 163 | |
| 164 | |
| 165 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 166 | RecordWriteHelper(masm, object_, addr_, scratch_); |
| 167 | masm->ret(0); |
| 168 | } |
| 169 | |
| 170 | |
| 171 | // Set the remembered set bit for [object+offset]. |
| 172 | // object is the object being stored into, value is the object being stored. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 173 | // If offset is zero, then the smi_index register contains the array index into |
| 174 | // the elements array represented as a smi. Otherwise it can be used as a |
| 175 | // scratch register. |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 176 | // All registers are clobbered by the operation. |
| 177 | void MacroAssembler::RecordWrite(Register object, |
| 178 | int offset, |
| 179 | Register value, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 180 | Register smi_index) { |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 181 | // The compiled code assumes that record write doesn't change the |
| 182 | // context register, so we check that none of the clobbered |
| 183 | // registers are rsi. |
| 184 | ASSERT(!object.is(rsi) && !value.is(rsi) && !smi_index.is(rsi)); |
| 185 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 186 | // First, check if a remembered set write is even needed. The tests below |
| 187 | // catch stores of Smis and stores into young gen (which does not have space |
| 188 | // for the remembered set bits. |
| 189 | Label done; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 190 | JumpIfSmi(value, &done); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 191 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 192 | RecordWriteNonSmi(object, offset, value, smi_index); |
| 193 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 194 | |
| 195 | // Clobber all input registers when running with the debug-code flag |
| 196 | // turned on to provoke errors. This clobbering repeats the |
| 197 | // clobbering done inside RecordWriteNonSmi but it's necessary to |
| 198 | // avoid having the fast case for smis leave the registers |
| 199 | // unchanged. |
| 200 | if (FLAG_debug_code) { |
| 201 | movq(object, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 202 | movq(value, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 203 | movq(smi_index, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 204 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | |
| 208 | void MacroAssembler::RecordWriteNonSmi(Register object, |
| 209 | int offset, |
| 210 | Register scratch, |
| 211 | Register smi_index) { |
| 212 | Label done; |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 213 | |
| 214 | if (FLAG_debug_code) { |
| 215 | Label okay; |
| 216 | JumpIfNotSmi(object, &okay); |
| 217 | Abort("MacroAssembler::RecordWriteNonSmi cannot deal with smis"); |
| 218 | bind(&okay); |
| 219 | } |
| 220 | |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 221 | // Test that the object address is not in the new space. We cannot |
| 222 | // set remembered set bits in the new space. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 223 | movq(scratch, object); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 224 | ASSERT(is_int32(static_cast<int64_t>(Heap::NewSpaceMask()))); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 225 | and_(scratch, Immediate(static_cast<int32_t>(Heap::NewSpaceMask()))); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 226 | movq(kScratchRegister, ExternalReference::new_space_start()); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 227 | cmpq(scratch, kScratchRegister); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 228 | j(equal, &done); |
| 229 | |
| 230 | if ((offset > 0) && (offset < Page::kMaxHeapObjectSize)) { |
| 231 | // Compute the bit offset in the remembered set, leave it in 'value'. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 232 | lea(scratch, Operand(object, offset)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 233 | ASSERT(is_int32(Page::kPageAlignmentMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 234 | and_(scratch, Immediate(static_cast<int32_t>(Page::kPageAlignmentMask))); |
| 235 | shr(scratch, Immediate(kObjectAlignmentBits)); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 236 | |
| 237 | // Compute the page address from the heap object pointer, leave it in |
| 238 | // 'object' (immediate value is sign extended). |
| 239 | and_(object, Immediate(~Page::kPageAlignmentMask)); |
| 240 | |
| 241 | // NOTE: For now, we use the bit-test-and-set (bts) x86 instruction |
| 242 | // to limit code size. We should probably evaluate this decision by |
| 243 | // measuring the performance of an equivalent implementation using |
| 244 | // "simpler" instructions |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 245 | bts(Operand(object, Page::kRSetOffset), scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 246 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 247 | Register dst = smi_index; |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 248 | if (offset != 0) { |
| 249 | lea(dst, Operand(object, offset)); |
| 250 | } else { |
| 251 | // array access: calculate the destination address in the same manner as |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 252 | // KeyedStoreIC::GenerateGeneric. |
| 253 | SmiIndex index = SmiToIndex(smi_index, smi_index, kPointerSizeLog2); |
| 254 | lea(dst, Operand(object, |
| 255 | index.reg, |
| 256 | index.scale, |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 257 | FixedArray::kHeaderSize - kHeapObjectTag)); |
| 258 | } |
| 259 | // If we are already generating a shared stub, not inlining the |
| 260 | // record write code isn't going to save us any memory. |
| 261 | if (generating_stub()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 262 | RecordWriteHelper(this, object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 263 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 264 | RecordWriteStub stub(object, dst, scratch); |
sgjesse@chromium.org | b9d7da1 | 2009-08-05 08:38:10 +0000 | [diff] [blame] | 265 | CallStub(&stub); |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | bind(&done); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 270 | |
| 271 | // Clobber all input registers when running with the debug-code flag |
| 272 | // turned on to provoke errors. |
| 273 | if (FLAG_debug_code) { |
| 274 | movq(object, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 275 | movq(scratch, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 276 | movq(smi_index, bit_cast<int64_t>(kZapValue), RelocInfo::NONE); |
| 277 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 281 | void MacroAssembler::Assert(Condition cc, const char* msg) { |
| 282 | if (FLAG_debug_code) Check(cc, msg); |
| 283 | } |
| 284 | |
| 285 | |
| 286 | void MacroAssembler::Check(Condition cc, const char* msg) { |
| 287 | Label L; |
| 288 | j(cc, &L); |
| 289 | Abort(msg); |
| 290 | // will not return here |
| 291 | bind(&L); |
| 292 | } |
| 293 | |
| 294 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 295 | void MacroAssembler::NegativeZeroTest(Register result, |
| 296 | Register op, |
| 297 | Label* then_label) { |
| 298 | Label ok; |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 299 | testl(result, result); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 300 | j(not_zero, &ok); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 301 | testl(op, op); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 302 | j(sign, then_label); |
| 303 | bind(&ok); |
| 304 | } |
| 305 | |
| 306 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 307 | void MacroAssembler::Abort(const char* msg) { |
| 308 | // We want to pass the msg string like a smi to avoid GC |
| 309 | // problems, however msg is not guaranteed to be aligned |
| 310 | // properly. Instead, we pass an aligned pointer that is |
| 311 | // a proper v8 smi, but also pass the alignment difference |
| 312 | // from the real pointer as a smi. |
| 313 | intptr_t p1 = reinterpret_cast<intptr_t>(msg); |
| 314 | intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; |
| 315 | // Note: p0 might not be a valid Smi *value*, but it has a valid Smi tag. |
| 316 | ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); |
| 317 | #ifdef DEBUG |
| 318 | if (msg != NULL) { |
| 319 | RecordComment("Abort message: "); |
| 320 | RecordComment(msg); |
| 321 | } |
| 322 | #endif |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 323 | // Disable stub call restrictions to always allow calls to abort. |
| 324 | set_allow_stub_calls(true); |
| 325 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 326 | push(rax); |
| 327 | movq(kScratchRegister, p0, RelocInfo::NONE); |
| 328 | push(kScratchRegister); |
| 329 | movq(kScratchRegister, |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 330 | reinterpret_cast<intptr_t>(Smi::FromInt(static_cast<int>(p1 - p0))), |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 331 | RelocInfo::NONE); |
| 332 | push(kScratchRegister); |
| 333 | CallRuntime(Runtime::kAbort, 2); |
| 334 | // will not return here |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 335 | int3(); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | |
| 339 | void MacroAssembler::CallStub(CodeStub* stub) { |
| 340 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 341 | Call(stub->GetCode(), RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 345 | void MacroAssembler::TailCallStub(CodeStub* stub) { |
| 346 | ASSERT(allow_stub_calls()); // calls are not allowed in some stubs |
| 347 | Jump(stub->GetCode(), RelocInfo::CODE_TARGET); |
| 348 | } |
| 349 | |
| 350 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 351 | void MacroAssembler::StubReturn(int argc) { |
| 352 | ASSERT(argc >= 1 && generating_stub()); |
| 353 | ret((argc - 1) * kPointerSize); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 358 | if (num_arguments > 0) { |
| 359 | addq(rsp, Immediate(num_arguments * kPointerSize)); |
| 360 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 361 | LoadRoot(rax, Heap::kUndefinedValueRootIndex); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 362 | } |
| 363 | |
| 364 | |
| 365 | void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) { |
| 366 | CallRuntime(Runtime::FunctionForId(id), num_arguments); |
| 367 | } |
| 368 | |
| 369 | |
| 370 | void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { |
| 371 | // If the expected number of arguments of the runtime function is |
| 372 | // constant, we check that the actual number of arguments match the |
| 373 | // expectation. |
| 374 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 375 | IllegalOperation(num_arguments); |
| 376 | return; |
| 377 | } |
| 378 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 379 | // TODO(1236192): Most runtime routines don't need the number of |
| 380 | // arguments passed in because it is constant. At some point we |
| 381 | // should remove this need and make the runtime routine entry code |
| 382 | // smarter. |
| 383 | movq(rax, Immediate(num_arguments)); |
| 384 | movq(rbx, ExternalReference(f)); |
| 385 | CEntryStub ces(f->result_size); |
| 386 | CallStub(&ces); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | |
| 390 | void MacroAssembler::TailCallRuntime(ExternalReference const& ext, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 391 | int num_arguments, |
| 392 | int result_size) { |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 393 | // ----------- S t a t e ------------- |
| 394 | // -- rsp[0] : return address |
| 395 | // -- rsp[8] : argument num_arguments - 1 |
| 396 | // ... |
| 397 | // -- rsp[8 * num_arguments] : argument 0 (receiver) |
| 398 | // ----------------------------------- |
| 399 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 400 | // TODO(1236192): Most runtime routines don't need the number of |
| 401 | // arguments passed in because it is constant. At some point we |
| 402 | // should remove this need and make the runtime routine entry code |
| 403 | // smarter. |
| 404 | movq(rax, Immediate(num_arguments)); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 405 | JumpToRuntime(ext, result_size); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 409 | void MacroAssembler::JumpToRuntime(const ExternalReference& ext, |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 410 | int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 411 | // Set the entry point and jump to the C entry runtime stub. |
| 412 | movq(rbx, ext); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 413 | CEntryStub ces(result_size); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 414 | jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 415 | } |
| 416 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 417 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 418 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
| 419 | bool resolved; |
| 420 | Handle<Code> code = ResolveBuiltin(id, &resolved); |
| 421 | |
| 422 | const char* name = Builtins::GetName(id); |
| 423 | int argc = Builtins::GetArgumentsCount(id); |
| 424 | |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 425 | movq(target, code, RelocInfo::EMBEDDED_OBJECT); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 426 | if (!resolved) { |
| 427 | uint32_t flags = |
| 428 | Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 429 | Bootstrapper::FixupFlagsUseCodeObject::encode(true); |
| 430 | Unresolved entry = { pc_offset() - sizeof(intptr_t), flags, name }; |
| 431 | unresolved_.Add(entry); |
| 432 | } |
| 433 | addq(target, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 434 | } |
| 435 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 436 | Handle<Code> MacroAssembler::ResolveBuiltin(Builtins::JavaScript id, |
| 437 | bool* resolved) { |
| 438 | // Move the builtin function into the temporary function slot by |
| 439 | // reading it from the builtins object. NOTE: We should be able to |
| 440 | // reduce this to two instructions by putting the function table in |
| 441 | // the global object instead of the "builtins" object and by using a |
| 442 | // real register for the function. |
| 443 | movq(rdx, Operand(rsi, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 444 | movq(rdx, FieldOperand(rdx, GlobalObject::kBuiltinsOffset)); |
| 445 | int builtins_offset = |
| 446 | JSBuiltinsObject::kJSBuiltinsOffset + (id * kPointerSize); |
| 447 | movq(rdi, FieldOperand(rdx, builtins_offset)); |
| 448 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 449 | return Builtins::GetCode(id, resolved); |
| 450 | } |
| 451 | |
| 452 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 453 | void MacroAssembler::Set(Register dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 454 | if (x == 0) { |
| 455 | xor_(dst, dst); |
| 456 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 457 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 458 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 459 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 460 | } else { |
| 461 | movq(dst, x, RelocInfo::NONE); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | |
| 466 | void MacroAssembler::Set(const Operand& dst, int64_t x) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 467 | if (x == 0) { |
| 468 | xor_(kScratchRegister, kScratchRegister); |
| 469 | movq(dst, kScratchRegister); |
| 470 | } else if (is_int32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 471 | movq(dst, Immediate(static_cast<int32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 472 | } else if (is_uint32(x)) { |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 473 | movl(dst, Immediate(static_cast<uint32_t>(x))); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 474 | } else { |
| 475 | movq(kScratchRegister, x, RelocInfo::NONE); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 476 | movq(dst, kScratchRegister); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 477 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 478 | } |
| 479 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 480 | // ---------------------------------------------------------------------------- |
| 481 | // Smi tagging, untagging and tag detection. |
| 482 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 483 | static int kSmiShift = kSmiTagSize + kSmiShiftSize; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 484 | |
| 485 | void MacroAssembler::Integer32ToSmi(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 486 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 487 | if (!dst.is(src)) { |
| 488 | movl(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 489 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 490 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | |
| 494 | void MacroAssembler::Integer32ToSmi(Register dst, |
| 495 | Register src, |
| 496 | Label* on_overflow) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 497 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 498 | // 32-bit integer always fits in a long smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 499 | if (!dst.is(src)) { |
| 500 | movl(dst, src); |
| 501 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 502 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 506 | void MacroAssembler::Integer64PlusConstantToSmi(Register dst, |
| 507 | Register src, |
| 508 | int constant) { |
| 509 | if (dst.is(src)) { |
| 510 | addq(dst, Immediate(constant)); |
| 511 | } else { |
| 512 | lea(dst, Operand(src, constant)); |
| 513 | } |
| 514 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | |
| 518 | void MacroAssembler::SmiToInteger32(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 519 | ASSERT_EQ(0, kSmiTag); |
| 520 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 521 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 522 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 523 | shr(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 524 | } |
| 525 | |
| 526 | |
| 527 | void MacroAssembler::SmiToInteger64(Register dst, Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 528 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 529 | if (!dst.is(src)) { |
| 530 | movq(dst, src); |
| 531 | } |
| 532 | sar(dst, Immediate(kSmiShift)); |
| 533 | } |
| 534 | |
| 535 | |
| 536 | void MacroAssembler::SmiTest(Register src) { |
| 537 | testq(src, src); |
| 538 | } |
| 539 | |
| 540 | |
| 541 | void MacroAssembler::SmiCompare(Register dst, Register src) { |
| 542 | cmpq(dst, src); |
| 543 | } |
| 544 | |
| 545 | |
| 546 | void MacroAssembler::SmiCompare(Register dst, Smi* src) { |
| 547 | ASSERT(!dst.is(kScratchRegister)); |
| 548 | if (src->value() == 0) { |
| 549 | testq(dst, dst); |
| 550 | } else { |
| 551 | Move(kScratchRegister, src); |
| 552 | cmpq(dst, kScratchRegister); |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | |
| 557 | void MacroAssembler::SmiCompare(const Operand& dst, Register src) { |
| 558 | cmpq(dst, src); |
| 559 | } |
| 560 | |
| 561 | |
| 562 | void MacroAssembler::SmiCompare(const Operand& dst, Smi* src) { |
| 563 | if (src->value() == 0) { |
| 564 | // Only tagged long smi to have 32-bit representation. |
| 565 | cmpq(dst, Immediate(0)); |
| 566 | } else { |
| 567 | Move(kScratchRegister, src); |
| 568 | cmpq(dst, kScratchRegister); |
| 569 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | |
| 573 | void MacroAssembler::PositiveSmiTimesPowerOfTwoToInteger64(Register dst, |
| 574 | Register src, |
| 575 | int power) { |
| 576 | ASSERT(power >= 0); |
| 577 | ASSERT(power < 64); |
| 578 | if (power == 0) { |
| 579 | SmiToInteger64(dst, src); |
| 580 | return; |
| 581 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 582 | if (!dst.is(src)) { |
| 583 | movq(dst, src); |
| 584 | } |
| 585 | if (power < kSmiShift) { |
| 586 | sar(dst, Immediate(kSmiShift - power)); |
| 587 | } else if (power > kSmiShift) { |
| 588 | shl(dst, Immediate(power - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 589 | } |
| 590 | } |
| 591 | |
| 592 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 593 | Condition MacroAssembler::CheckSmi(Register src) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 594 | ASSERT_EQ(0, kSmiTag); |
| 595 | testb(src, Immediate(kSmiTagMask)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 596 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | |
| 600 | Condition MacroAssembler::CheckPositiveSmi(Register src) { |
| 601 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 602 | movq(kScratchRegister, src); |
| 603 | rol(kScratchRegister, Immediate(1)); |
| 604 | testl(kScratchRegister, Immediate(0x03)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 605 | return zero; |
| 606 | } |
| 607 | |
| 608 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 609 | Condition MacroAssembler::CheckBothSmi(Register first, Register second) { |
| 610 | if (first.is(second)) { |
| 611 | return CheckSmi(first); |
| 612 | } |
| 613 | movl(kScratchRegister, first); |
| 614 | orl(kScratchRegister, second); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 615 | testb(kScratchRegister, Immediate(kSmiTagMask)); |
| 616 | return zero; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 620 | Condition MacroAssembler::CheckBothPositiveSmi(Register first, |
| 621 | Register second) { |
| 622 | if (first.is(second)) { |
| 623 | return CheckPositiveSmi(first); |
| 624 | } |
| 625 | movl(kScratchRegister, first); |
| 626 | orl(kScratchRegister, second); |
| 627 | rol(kScratchRegister, Immediate(1)); |
| 628 | testl(kScratchRegister, Immediate(0x03)); |
| 629 | return zero; |
| 630 | } |
| 631 | |
| 632 | |
| 633 | |
| 634 | Condition MacroAssembler::CheckEitherSmi(Register first, Register second) { |
| 635 | if (first.is(second)) { |
| 636 | return CheckSmi(first); |
| 637 | } |
| 638 | movl(kScratchRegister, first); |
| 639 | andl(kScratchRegister, second); |
| 640 | testb(kScratchRegister, Immediate(kSmiTagMask)); |
| 641 | return zero; |
| 642 | } |
| 643 | |
| 644 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 645 | Condition MacroAssembler::CheckIsMinSmi(Register src) { |
| 646 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 647 | movq(kScratchRegister, src); |
| 648 | rol(kScratchRegister, Immediate(1)); |
| 649 | cmpq(kScratchRegister, Immediate(1)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 650 | return equal; |
| 651 | } |
| 652 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 653 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 654 | Condition MacroAssembler::CheckInteger32ValidSmiValue(Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 655 | // A 32-bit integer value can always be converted to a smi. |
| 656 | return always; |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 660 | Condition MacroAssembler::CheckUInteger32ValidSmiValue(Register src) { |
| 661 | // An unsigned 32-bit integer value is valid as long as the high bit |
| 662 | // is not set. |
| 663 | testq(src, Immediate(0x80000000)); |
| 664 | return zero; |
| 665 | } |
| 666 | |
| 667 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 668 | void MacroAssembler::SmiNeg(Register dst, Register src, Label* on_smi_result) { |
| 669 | if (dst.is(src)) { |
| 670 | ASSERT(!dst.is(kScratchRegister)); |
| 671 | movq(kScratchRegister, src); |
| 672 | neg(dst); // Low 32 bits are retained as zero by negation. |
| 673 | // Test if result is zero or Smi::kMinValue. |
| 674 | cmpq(dst, kScratchRegister); |
| 675 | j(not_equal, on_smi_result); |
| 676 | movq(src, kScratchRegister); |
| 677 | } else { |
| 678 | movq(dst, src); |
| 679 | neg(dst); |
| 680 | cmpq(dst, src); |
| 681 | // If the result is zero or Smi::kMinValue, negation failed to create a smi. |
| 682 | j(not_equal, on_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 683 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 684 | } |
| 685 | |
| 686 | |
| 687 | void MacroAssembler::SmiAdd(Register dst, |
| 688 | Register src1, |
| 689 | Register src2, |
| 690 | Label* on_not_smi_result) { |
| 691 | ASSERT(!dst.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 692 | if (dst.is(src1)) { |
| 693 | addq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 694 | Label smi_result; |
| 695 | j(no_overflow, &smi_result); |
| 696 | // Restore src1. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 697 | subq(src1, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 698 | jmp(on_not_smi_result); |
| 699 | bind(&smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 700 | } else { |
| 701 | movq(dst, src1); |
| 702 | addq(dst, src2); |
| 703 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 704 | } |
| 705 | } |
| 706 | |
| 707 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 708 | void MacroAssembler::SmiSub(Register dst, |
| 709 | Register src1, |
| 710 | Register src2, |
| 711 | Label* on_not_smi_result) { |
| 712 | ASSERT(!dst.is(src2)); |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 713 | if (on_not_smi_result == NULL) { |
| 714 | // No overflow checking. Use only when it's known that |
| 715 | // overflowing is impossible (e.g., subtracting two positive smis). |
| 716 | if (dst.is(src1)) { |
| 717 | subq(dst, src2); |
| 718 | } else { |
| 719 | movq(dst, src1); |
| 720 | subq(dst, src2); |
| 721 | } |
| 722 | Assert(no_overflow, "Smi substraction onverflow"); |
| 723 | } else if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 724 | subq(dst, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 725 | Label smi_result; |
| 726 | j(no_overflow, &smi_result); |
| 727 | // Restore src1. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 728 | addq(src1, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 729 | jmp(on_not_smi_result); |
| 730 | bind(&smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 731 | } else { |
| 732 | movq(dst, src1); |
| 733 | subq(dst, src2); |
| 734 | j(overflow, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 735 | } |
| 736 | } |
| 737 | |
| 738 | |
| 739 | void MacroAssembler::SmiMul(Register dst, |
| 740 | Register src1, |
| 741 | Register src2, |
| 742 | Label* on_not_smi_result) { |
| 743 | ASSERT(!dst.is(src2)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 744 | ASSERT(!dst.is(kScratchRegister)); |
| 745 | ASSERT(!src1.is(kScratchRegister)); |
| 746 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 747 | |
| 748 | if (dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 749 | Label failure, zero_correct_result; |
| 750 | movq(kScratchRegister, src1); // Create backup for later testing. |
| 751 | SmiToInteger64(dst, src1); |
| 752 | imul(dst, src2); |
| 753 | j(overflow, &failure); |
| 754 | |
| 755 | // Check for negative zero result. If product is zero, and one |
| 756 | // argument is negative, go to slow case. |
| 757 | Label correct_result; |
| 758 | testq(dst, dst); |
| 759 | j(not_zero, &correct_result); |
| 760 | |
| 761 | movq(dst, kScratchRegister); |
| 762 | xor_(dst, src2); |
| 763 | j(positive, &zero_correct_result); // Result was positive zero. |
| 764 | |
| 765 | bind(&failure); // Reused failure exit, restores src1. |
| 766 | movq(src1, kScratchRegister); |
| 767 | jmp(on_not_smi_result); |
| 768 | |
| 769 | bind(&zero_correct_result); |
| 770 | xor_(dst, dst); |
| 771 | |
| 772 | bind(&correct_result); |
| 773 | } else { |
| 774 | SmiToInteger64(dst, src1); |
| 775 | imul(dst, src2); |
| 776 | j(overflow, on_not_smi_result); |
| 777 | // Check for negative zero result. If product is zero, and one |
| 778 | // argument is negative, go to slow case. |
| 779 | Label correct_result; |
| 780 | testq(dst, dst); |
| 781 | j(not_zero, &correct_result); |
| 782 | // One of src1 and src2 is zero, the check whether the other is |
| 783 | // negative. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 784 | movq(kScratchRegister, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 785 | xor_(kScratchRegister, src2); |
| 786 | j(negative, on_not_smi_result); |
| 787 | bind(&correct_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 788 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | |
| 792 | void MacroAssembler::SmiTryAddConstant(Register dst, |
| 793 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 794 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 795 | Label* on_not_smi_result) { |
| 796 | // Does not assume that src is a smi. |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 797 | ASSERT_EQ(static_cast<int>(1), static_cast<int>(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 798 | ASSERT_EQ(0, kSmiTag); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 799 | ASSERT(!dst.is(kScratchRegister)); |
| 800 | ASSERT(!src.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 801 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 802 | JumpIfNotSmi(src, on_not_smi_result); |
| 803 | Register tmp = (dst.is(src) ? kScratchRegister : dst); |
| 804 | Move(tmp, constant); |
| 805 | addq(tmp, src); |
| 806 | j(overflow, on_not_smi_result); |
| 807 | if (dst.is(src)) { |
| 808 | movq(dst, tmp); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | |
| 813 | void MacroAssembler::SmiAddConstant(Register dst, Register src, Smi* constant) { |
| 814 | if (constant->value() == 0) { |
| 815 | if (!dst.is(src)) { |
| 816 | movq(dst, src); |
| 817 | } |
| 818 | } else if (dst.is(src)) { |
| 819 | ASSERT(!dst.is(kScratchRegister)); |
| 820 | |
| 821 | Move(kScratchRegister, constant); |
| 822 | addq(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 823 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 824 | Move(dst, constant); |
| 825 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 826 | } |
| 827 | } |
| 828 | |
| 829 | |
| 830 | void MacroAssembler::SmiAddConstant(Register dst, |
| 831 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 832 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 833 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 834 | if (constant->value() == 0) { |
| 835 | if (!dst.is(src)) { |
| 836 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 837 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 838 | } else if (dst.is(src)) { |
| 839 | ASSERT(!dst.is(kScratchRegister)); |
| 840 | |
| 841 | Move(kScratchRegister, constant); |
| 842 | addq(dst, kScratchRegister); |
| 843 | Label result_ok; |
| 844 | j(no_overflow, &result_ok); |
| 845 | subq(dst, kScratchRegister); |
| 846 | jmp(on_not_smi_result); |
| 847 | bind(&result_ok); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 848 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 849 | Move(dst, constant); |
| 850 | addq(dst, src); |
| 851 | j(overflow, on_not_smi_result); |
| 852 | } |
| 853 | } |
| 854 | |
| 855 | |
| 856 | void MacroAssembler::SmiSubConstant(Register dst, Register src, Smi* constant) { |
| 857 | if (constant->value() == 0) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 858 | if (!dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 859 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 860 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 861 | } else if (dst.is(src)) { |
| 862 | ASSERT(!dst.is(kScratchRegister)); |
| 863 | |
| 864 | Move(kScratchRegister, constant); |
| 865 | subq(dst, kScratchRegister); |
| 866 | } else { |
| 867 | // Subtract by adding the negative, to do it in two operations. |
| 868 | if (constant->value() == Smi::kMinValue) { |
| 869 | Move(kScratchRegister, constant); |
| 870 | movq(dst, src); |
| 871 | subq(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 872 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 873 | Move(dst, Smi::FromInt(-constant->value())); |
| 874 | addq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 875 | } |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | |
| 880 | void MacroAssembler::SmiSubConstant(Register dst, |
| 881 | Register src, |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 882 | Smi* constant, |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 883 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 884 | if (constant->value() == 0) { |
| 885 | if (!dst.is(src)) { |
| 886 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 887 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 888 | } else if (dst.is(src)) { |
| 889 | ASSERT(!dst.is(kScratchRegister)); |
| 890 | |
| 891 | Move(kScratchRegister, constant); |
| 892 | subq(dst, kScratchRegister); |
| 893 | Label sub_success; |
| 894 | j(no_overflow, &sub_success); |
| 895 | addq(src, kScratchRegister); |
| 896 | jmp(on_not_smi_result); |
| 897 | bind(&sub_success); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 898 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 899 | if (constant->value() == Smi::kMinValue) { |
| 900 | Move(kScratchRegister, constant); |
| 901 | movq(dst, src); |
| 902 | subq(dst, kScratchRegister); |
| 903 | j(overflow, on_not_smi_result); |
| 904 | } else { |
| 905 | Move(dst, Smi::FromInt(-(constant->value()))); |
| 906 | addq(dst, src); |
| 907 | j(overflow, on_not_smi_result); |
| 908 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 909 | } |
| 910 | } |
| 911 | |
| 912 | |
| 913 | void MacroAssembler::SmiDiv(Register dst, |
| 914 | Register src1, |
| 915 | Register src2, |
| 916 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 917 | ASSERT(!src1.is(kScratchRegister)); |
| 918 | ASSERT(!src2.is(kScratchRegister)); |
| 919 | ASSERT(!dst.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 920 | ASSERT(!src2.is(rax)); |
| 921 | ASSERT(!src2.is(rdx)); |
| 922 | ASSERT(!src1.is(rdx)); |
| 923 | |
| 924 | // Check for 0 divisor (result is +/-Infinity). |
| 925 | Label positive_divisor; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 926 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 927 | j(zero, on_not_smi_result); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 928 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 929 | if (src1.is(rax)) { |
| 930 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 931 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 932 | SmiToInteger32(rax, src1); |
| 933 | // We need to rule out dividing Smi::kMinValue by -1, since that would |
| 934 | // overflow in idiv and raise an exception. |
| 935 | // We combine this with negative zero test (negative zero only happens |
| 936 | // when dividing zero by a negative number). |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 937 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 938 | // We overshoot a little and go to slow case if we divide min-value |
| 939 | // by any negative value, not just -1. |
| 940 | Label safe_div; |
| 941 | testl(rax, Immediate(0x7fffffff)); |
| 942 | j(not_zero, &safe_div); |
| 943 | testq(src2, src2); |
| 944 | if (src1.is(rax)) { |
| 945 | j(positive, &safe_div); |
| 946 | movq(src1, kScratchRegister); |
| 947 | jmp(on_not_smi_result); |
| 948 | } else { |
| 949 | j(negative, on_not_smi_result); |
| 950 | } |
| 951 | bind(&safe_div); |
| 952 | |
| 953 | SmiToInteger32(src2, src2); |
| 954 | // Sign extend src1 into edx:eax. |
| 955 | cdq(); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 956 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 957 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 958 | // Check that the remainder is zero. |
| 959 | testl(rdx, rdx); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 960 | if (src1.is(rax)) { |
| 961 | Label smi_result; |
| 962 | j(zero, &smi_result); |
| 963 | movq(src1, kScratchRegister); |
| 964 | jmp(on_not_smi_result); |
| 965 | bind(&smi_result); |
| 966 | } else { |
| 967 | j(not_zero, on_not_smi_result); |
| 968 | } |
| 969 | if (!dst.is(src1) && src1.is(rax)) { |
| 970 | movq(src1, kScratchRegister); |
| 971 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 972 | Integer32ToSmi(dst, rax); |
| 973 | } |
| 974 | |
| 975 | |
| 976 | void MacroAssembler::SmiMod(Register dst, |
| 977 | Register src1, |
| 978 | Register src2, |
| 979 | Label* on_not_smi_result) { |
| 980 | ASSERT(!dst.is(kScratchRegister)); |
| 981 | ASSERT(!src1.is(kScratchRegister)); |
| 982 | ASSERT(!src2.is(kScratchRegister)); |
| 983 | ASSERT(!src2.is(rax)); |
| 984 | ASSERT(!src2.is(rdx)); |
| 985 | ASSERT(!src1.is(rdx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 986 | ASSERT(!src1.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 987 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 988 | testq(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 989 | j(zero, on_not_smi_result); |
| 990 | |
| 991 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 992 | movq(kScratchRegister, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 993 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 994 | SmiToInteger32(rax, src1); |
| 995 | SmiToInteger32(src2, src2); |
| 996 | |
| 997 | // Test for the edge case of dividing Smi::kMinValue by -1 (will overflow). |
| 998 | Label safe_div; |
| 999 | cmpl(rax, Immediate(Smi::kMinValue)); |
| 1000 | j(not_equal, &safe_div); |
| 1001 | cmpl(src2, Immediate(-1)); |
| 1002 | j(not_equal, &safe_div); |
| 1003 | // Retag inputs and go slow case. |
| 1004 | Integer32ToSmi(src2, src2); |
| 1005 | if (src1.is(rax)) { |
| 1006 | movq(src1, kScratchRegister); |
| 1007 | } |
| 1008 | jmp(on_not_smi_result); |
| 1009 | bind(&safe_div); |
| 1010 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1011 | // Sign extend eax into edx:eax. |
| 1012 | cdq(); |
| 1013 | idivl(src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1014 | // Restore smi tags on inputs. |
| 1015 | Integer32ToSmi(src2, src2); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1016 | if (src1.is(rax)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1017 | movq(src1, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1018 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1019 | // Check for a negative zero result. If the result is zero, and the |
| 1020 | // dividend is negative, go slow to return a floating point negative zero. |
| 1021 | Label smi_result; |
| 1022 | testl(rdx, rdx); |
| 1023 | j(not_zero, &smi_result); |
| 1024 | testq(src1, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1025 | j(negative, on_not_smi_result); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1026 | bind(&smi_result); |
| 1027 | Integer32ToSmi(dst, rdx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1028 | } |
| 1029 | |
| 1030 | |
| 1031 | void MacroAssembler::SmiNot(Register dst, Register src) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1032 | ASSERT(!dst.is(kScratchRegister)); |
| 1033 | ASSERT(!src.is(kScratchRegister)); |
| 1034 | // Set tag and padding bits before negating, so that they are zero afterwards. |
| 1035 | movl(kScratchRegister, Immediate(~0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1036 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1037 | xor_(dst, kScratchRegister); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1038 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1039 | lea(dst, Operand(src, kScratchRegister, times_1, 0)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1040 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1041 | not_(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1042 | } |
| 1043 | |
| 1044 | |
| 1045 | void MacroAssembler::SmiAnd(Register dst, Register src1, Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1046 | ASSERT(!dst.is(src2)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1047 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1048 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1049 | } |
| 1050 | and_(dst, src2); |
| 1051 | } |
| 1052 | |
| 1053 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1054 | void MacroAssembler::SmiAndConstant(Register dst, Register src, Smi* constant) { |
| 1055 | if (constant->value() == 0) { |
| 1056 | xor_(dst, dst); |
| 1057 | } else if (dst.is(src)) { |
| 1058 | ASSERT(!dst.is(kScratchRegister)); |
| 1059 | Move(kScratchRegister, constant); |
| 1060 | and_(dst, kScratchRegister); |
| 1061 | } else { |
| 1062 | Move(dst, constant); |
| 1063 | and_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1064 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | |
| 1068 | void MacroAssembler::SmiOr(Register dst, Register src1, Register src2) { |
| 1069 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1070 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1071 | } |
| 1072 | or_(dst, src2); |
| 1073 | } |
| 1074 | |
| 1075 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1076 | void MacroAssembler::SmiOrConstant(Register dst, Register src, Smi* constant) { |
| 1077 | if (dst.is(src)) { |
| 1078 | ASSERT(!dst.is(kScratchRegister)); |
| 1079 | Move(kScratchRegister, constant); |
| 1080 | or_(dst, kScratchRegister); |
| 1081 | } else { |
| 1082 | Move(dst, constant); |
| 1083 | or_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1084 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1085 | } |
| 1086 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1087 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1088 | void MacroAssembler::SmiXor(Register dst, Register src1, Register src2) { |
| 1089 | if (!dst.is(src1)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1090 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1091 | } |
| 1092 | xor_(dst, src2); |
| 1093 | } |
| 1094 | |
| 1095 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1096 | void MacroAssembler::SmiXorConstant(Register dst, Register src, Smi* constant) { |
| 1097 | if (dst.is(src)) { |
| 1098 | ASSERT(!dst.is(kScratchRegister)); |
| 1099 | Move(kScratchRegister, constant); |
| 1100 | xor_(dst, kScratchRegister); |
| 1101 | } else { |
| 1102 | Move(dst, constant); |
| 1103 | xor_(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1104 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1108 | void MacroAssembler::SmiShiftArithmeticRightConstant(Register dst, |
| 1109 | Register src, |
| 1110 | int shift_value) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1111 | ASSERT(is_uint5(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1112 | if (shift_value > 0) { |
| 1113 | if (dst.is(src)) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1114 | sar(dst, Immediate(shift_value + kSmiShift)); |
| 1115 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1116 | } else { |
| 1117 | UNIMPLEMENTED(); // Not used. |
| 1118 | } |
| 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | |
| 1123 | void MacroAssembler::SmiShiftLogicalRightConstant(Register dst, |
| 1124 | Register src, |
| 1125 | int shift_value, |
| 1126 | Label* on_not_smi_result) { |
| 1127 | // Logic right shift interprets its result as an *unsigned* number. |
| 1128 | if (dst.is(src)) { |
| 1129 | UNIMPLEMENTED(); // Not used. |
| 1130 | } else { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1131 | movq(dst, src); |
| 1132 | if (shift_value == 0) { |
| 1133 | testq(dst, dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1134 | j(negative, on_not_smi_result); |
| 1135 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1136 | shr(dst, Immediate(shift_value + kSmiShift)); |
| 1137 | shl(dst, Immediate(kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1138 | } |
| 1139 | } |
| 1140 | |
| 1141 | |
| 1142 | void MacroAssembler::SmiShiftLeftConstant(Register dst, |
| 1143 | Register src, |
| 1144 | int shift_value, |
| 1145 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1146 | if (!dst.is(src)) { |
| 1147 | movq(dst, src); |
| 1148 | } |
| 1149 | if (shift_value > 0) { |
| 1150 | shl(dst, Immediate(shift_value)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | |
| 1155 | void MacroAssembler::SmiShiftLeft(Register dst, |
| 1156 | Register src1, |
| 1157 | Register src2, |
| 1158 | Label* on_not_smi_result) { |
| 1159 | ASSERT(!dst.is(rcx)); |
| 1160 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1161 | // Untag shift amount. |
| 1162 | if (!dst.is(src1)) { |
| 1163 | movq(dst, src1); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1164 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1165 | SmiToInteger32(rcx, src2); |
| 1166 | // Shift amount specified by lower 5 bits, not six as the shl opcode. |
| 1167 | and_(rcx, Immediate(0x1f)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1168 | shl_cl(dst); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1169 | } |
| 1170 | |
| 1171 | |
| 1172 | void MacroAssembler::SmiShiftLogicalRight(Register dst, |
| 1173 | Register src1, |
| 1174 | Register src2, |
| 1175 | Label* on_not_smi_result) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1176 | ASSERT(!dst.is(kScratchRegister)); |
| 1177 | ASSERT(!src1.is(kScratchRegister)); |
| 1178 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1179 | ASSERT(!dst.is(rcx)); |
| 1180 | Label result_ok; |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1181 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1182 | movq(kScratchRegister, rcx); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1183 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1184 | if (!dst.is(src1)) { |
| 1185 | movq(dst, src1); |
| 1186 | } |
| 1187 | SmiToInteger32(rcx, src2); |
| 1188 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1189 | shr_cl(dst); // Shift is rcx modulo 0x1f + 32. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1190 | shl(dst, Immediate(kSmiShift)); |
| 1191 | testq(dst, dst); |
| 1192 | if (src1.is(rcx) || src2.is(rcx)) { |
| 1193 | Label positive_result; |
| 1194 | j(positive, &positive_result); |
| 1195 | if (src1.is(rcx)) { |
| 1196 | movq(src1, kScratchRegister); |
| 1197 | } else { |
| 1198 | movq(src2, kScratchRegister); |
| 1199 | } |
| 1200 | jmp(on_not_smi_result); |
| 1201 | bind(&positive_result); |
| 1202 | } else { |
| 1203 | j(negative, on_not_smi_result); // src2 was zero and src1 negative. |
| 1204 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | |
| 1208 | void MacroAssembler::SmiShiftArithmeticRight(Register dst, |
| 1209 | Register src1, |
| 1210 | Register src2) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1211 | ASSERT(!dst.is(kScratchRegister)); |
| 1212 | ASSERT(!src1.is(kScratchRegister)); |
| 1213 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1214 | ASSERT(!dst.is(rcx)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1215 | if (src1.is(rcx)) { |
| 1216 | movq(kScratchRegister, src1); |
| 1217 | } else if (src2.is(rcx)) { |
| 1218 | movq(kScratchRegister, src2); |
| 1219 | } |
| 1220 | if (!dst.is(src1)) { |
| 1221 | movq(dst, src1); |
| 1222 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1223 | SmiToInteger32(rcx, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1224 | orl(rcx, Immediate(kSmiShift)); |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1225 | sar_cl(dst); // Shift 32 + original rcx & 0x1f. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1226 | shl(dst, Immediate(kSmiShift)); |
| 1227 | if (src1.is(rcx)) { |
| 1228 | movq(src1, kScratchRegister); |
| 1229 | } else if (src2.is(rcx)) { |
| 1230 | movq(src2, kScratchRegister); |
| 1231 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | |
| 1235 | void MacroAssembler::SelectNonSmi(Register dst, |
| 1236 | Register src1, |
| 1237 | Register src2, |
| 1238 | Label* on_not_smis) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1239 | ASSERT(!dst.is(kScratchRegister)); |
| 1240 | ASSERT(!src1.is(kScratchRegister)); |
| 1241 | ASSERT(!src2.is(kScratchRegister)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1242 | ASSERT(!dst.is(src1)); |
| 1243 | ASSERT(!dst.is(src2)); |
| 1244 | // Both operands must not be smis. |
| 1245 | #ifdef DEBUG |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1246 | if (allow_stub_calls()) { // Check contains a stub call. |
| 1247 | Condition not_both_smis = NegateCondition(CheckBothSmi(src1, src2)); |
| 1248 | Check(not_both_smis, "Both registers were smis in SelectNonSmi."); |
| 1249 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1250 | #endif |
| 1251 | ASSERT_EQ(0, kSmiTag); |
| 1252 | ASSERT_EQ(0, Smi::FromInt(0)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1253 | movl(kScratchRegister, Immediate(kSmiTagMask)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1254 | and_(kScratchRegister, src1); |
| 1255 | testl(kScratchRegister, src2); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1256 | // If non-zero then both are smis. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1257 | j(not_zero, on_not_smis); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1258 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1259 | // Exactly one operand is a smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1260 | ASSERT_EQ(1, static_cast<int>(kSmiTagMask)); |
| 1261 | // kScratchRegister still holds src1 & kSmiTag, which is either zero or one. |
| 1262 | subq(kScratchRegister, Immediate(1)); |
| 1263 | // If src1 is a smi, then scratch register all 1s, else it is all 0s. |
| 1264 | movq(dst, src1); |
| 1265 | xor_(dst, src2); |
| 1266 | and_(dst, kScratchRegister); |
| 1267 | // If src1 is a smi, dst holds src1 ^ src2, else it is zero. |
| 1268 | xor_(dst, src1); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1269 | // If src1 is a smi, dst is src2, else it is src1, i.e., the non-smi. |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1270 | } |
| 1271 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1272 | SmiIndex MacroAssembler::SmiToIndex(Register dst, |
| 1273 | Register src, |
| 1274 | int shift) { |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1275 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1276 | // There is a possible optimization if shift is in the range 60-63, but that |
| 1277 | // will (and must) never happen. |
| 1278 | if (!dst.is(src)) { |
| 1279 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1280 | } |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1281 | if (shift < kSmiShift) { |
| 1282 | sar(dst, Immediate(kSmiShift - shift)); |
| 1283 | } else { |
| 1284 | shl(dst, Immediate(shift - kSmiShift)); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1285 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1286 | return SmiIndex(dst, times_1); |
| 1287 | } |
| 1288 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1289 | SmiIndex MacroAssembler::SmiToNegativeIndex(Register dst, |
| 1290 | Register src, |
| 1291 | int shift) { |
| 1292 | // Register src holds a positive smi. |
| 1293 | ASSERT(is_uint6(shift)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1294 | if (!dst.is(src)) { |
| 1295 | movq(dst, src); |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1296 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1297 | neg(dst); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1298 | if (shift < kSmiShift) { |
| 1299 | sar(dst, Immediate(kSmiShift - shift)); |
| 1300 | } else { |
| 1301 | shl(dst, Immediate(shift - kSmiShift)); |
| 1302 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1303 | return SmiIndex(dst, times_1); |
| 1304 | } |
| 1305 | |
| 1306 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1307 | void MacroAssembler::JumpIfSmi(Register src, Label* on_smi) { |
| 1308 | ASSERT_EQ(0, kSmiTag); |
| 1309 | Condition smi = CheckSmi(src); |
| 1310 | j(smi, on_smi); |
| 1311 | } |
| 1312 | |
| 1313 | |
| 1314 | void MacroAssembler::JumpIfNotSmi(Register src, Label* on_not_smi) { |
| 1315 | Condition smi = CheckSmi(src); |
| 1316 | j(NegateCondition(smi), on_not_smi); |
| 1317 | } |
| 1318 | |
| 1319 | |
| 1320 | void MacroAssembler::JumpIfNotPositiveSmi(Register src, |
| 1321 | Label* on_not_positive_smi) { |
| 1322 | Condition positive_smi = CheckPositiveSmi(src); |
| 1323 | j(NegateCondition(positive_smi), on_not_positive_smi); |
| 1324 | } |
| 1325 | |
| 1326 | |
| 1327 | void MacroAssembler::JumpIfSmiEqualsConstant(Register src, |
| 1328 | Smi* constant, |
| 1329 | Label* on_equals) { |
| 1330 | SmiCompare(src, constant); |
| 1331 | j(equal, on_equals); |
| 1332 | } |
| 1333 | |
| 1334 | |
| 1335 | void MacroAssembler::JumpIfNotValidSmiValue(Register src, Label* on_invalid) { |
| 1336 | Condition is_valid = CheckInteger32ValidSmiValue(src); |
| 1337 | j(NegateCondition(is_valid), on_invalid); |
| 1338 | } |
| 1339 | |
| 1340 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1341 | void MacroAssembler::JumpIfUIntNotValidSmiValue(Register src, |
| 1342 | Label* on_invalid) { |
| 1343 | Condition is_valid = CheckUInteger32ValidSmiValue(src); |
| 1344 | j(NegateCondition(is_valid), on_invalid); |
| 1345 | } |
| 1346 | |
| 1347 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1348 | void MacroAssembler::JumpIfNotBothSmi(Register src1, Register src2, |
| 1349 | Label* on_not_both_smi) { |
| 1350 | Condition both_smi = CheckBothSmi(src1, src2); |
| 1351 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1352 | } |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1353 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1354 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 1355 | void MacroAssembler::JumpIfNotBothPositiveSmi(Register src1, Register src2, |
| 1356 | Label* on_not_both_smi) { |
| 1357 | Condition both_smi = CheckBothPositiveSmi(src1, src2); |
| 1358 | j(NegateCondition(both_smi), on_not_both_smi); |
| 1359 | } |
| 1360 | |
| 1361 | |
| 1362 | |
| 1363 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first_object, |
| 1364 | Register second_object, |
| 1365 | Register scratch1, |
| 1366 | Register scratch2, |
| 1367 | Label* on_fail) { |
| 1368 | // Check that both objects are not smis. |
| 1369 | Condition either_smi = CheckEitherSmi(first_object, second_object); |
| 1370 | j(either_smi, on_fail); |
| 1371 | |
| 1372 | // Load instance type for both strings. |
| 1373 | movq(scratch1, FieldOperand(first_object, HeapObject::kMapOffset)); |
| 1374 | movq(scratch2, FieldOperand(second_object, HeapObject::kMapOffset)); |
| 1375 | movzxbl(scratch1, FieldOperand(scratch1, Map::kInstanceTypeOffset)); |
| 1376 | movzxbl(scratch2, FieldOperand(scratch2, Map::kInstanceTypeOffset)); |
| 1377 | |
| 1378 | // Check that both are flat ascii strings. |
| 1379 | ASSERT(kNotStringTag != 0); |
| 1380 | const int kFlatAsciiStringMask = |
| 1381 | kIsNotStringMask | kStringRepresentationMask | kStringEncodingMask; |
| 1382 | const int kFlatAsciiStringTag = ASCII_STRING_TYPE; |
| 1383 | |
| 1384 | andl(scratch1, Immediate(kFlatAsciiStringMask)); |
| 1385 | andl(scratch2, Immediate(kFlatAsciiStringMask)); |
| 1386 | // Interleave the bits to check both scratch1 and scratch2 in one test. |
| 1387 | ASSERT_EQ(0, kFlatAsciiStringMask & (kFlatAsciiStringMask << 3)); |
| 1388 | lea(scratch1, Operand(scratch1, scratch2, times_8, 0)); |
| 1389 | cmpl(scratch1, |
| 1390 | Immediate(kFlatAsciiStringTag + (kFlatAsciiStringTag << 3))); |
| 1391 | j(not_equal, on_fail); |
| 1392 | } |
| 1393 | |
| 1394 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1395 | void MacroAssembler::Move(Register dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1396 | ASSERT(!source->IsFailure()); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1397 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1398 | Move(dst, Smi::cast(*source)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1399 | } else { |
| 1400 | movq(dst, source, RelocInfo::EMBEDDED_OBJECT); |
| 1401 | } |
| 1402 | } |
| 1403 | |
| 1404 | |
| 1405 | void MacroAssembler::Move(const Operand& dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1406 | ASSERT(!source->IsFailure()); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1407 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1408 | Move(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1409 | } else { |
| 1410 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1411 | movq(dst, kScratchRegister); |
| 1412 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | |
| 1416 | void MacroAssembler::Cmp(Register dst, Handle<Object> source) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1417 | if (source->IsSmi()) { |
| 1418 | SmiCompare(dst, Smi::cast(*source)); |
| 1419 | } else { |
| 1420 | Move(kScratchRegister, source); |
| 1421 | cmpq(dst, kScratchRegister); |
| 1422 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1423 | } |
| 1424 | |
| 1425 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1426 | void MacroAssembler::Cmp(const Operand& dst, Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1427 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1428 | SmiCompare(dst, Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1429 | } else { |
| 1430 | ASSERT(source->IsHeapObject()); |
| 1431 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1432 | cmpq(dst, kScratchRegister); |
| 1433 | } |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1434 | } |
| 1435 | |
| 1436 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1437 | void MacroAssembler::Push(Handle<Object> source) { |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1438 | if (source->IsSmi()) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1439 | Push(Smi::cast(*source)); |
kasperl@chromium.org | 68ac009 | 2009-07-09 06:00:35 +0000 | [diff] [blame] | 1440 | } else { |
| 1441 | ASSERT(source->IsHeapObject()); |
| 1442 | movq(kScratchRegister, source, RelocInfo::EMBEDDED_OBJECT); |
| 1443 | push(kScratchRegister); |
| 1444 | } |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1445 | } |
| 1446 | |
| 1447 | |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1448 | void MacroAssembler::Push(Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1449 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 1450 | if (is_int32(smi)) { |
| 1451 | push(Immediate(static_cast<int32_t>(smi))); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1452 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1453 | Set(kScratchRegister, smi); |
| 1454 | push(kScratchRegister); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1459 | void MacroAssembler::Drop(int stack_elements) { |
| 1460 | if (stack_elements > 0) { |
| 1461 | addq(rsp, Immediate(stack_elements * kPointerSize)); |
| 1462 | } |
| 1463 | } |
| 1464 | |
| 1465 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1466 | void MacroAssembler::Test(const Operand& src, Smi* source) { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1467 | intptr_t smi = reinterpret_cast<intptr_t>(source); |
| 1468 | if (is_int32(smi)) { |
| 1469 | testl(src, Immediate(static_cast<int32_t>(smi))); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1470 | } else { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1471 | Move(kScratchRegister, source); |
| 1472 | testq(src, kScratchRegister); |
sgjesse@chromium.org | 0b6db59 | 2009-07-30 14:48:31 +0000 | [diff] [blame] | 1473 | } |
| 1474 | } |
| 1475 | |
| 1476 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1477 | void MacroAssembler::Jump(ExternalReference ext) { |
| 1478 | movq(kScratchRegister, ext); |
| 1479 | jmp(kScratchRegister); |
| 1480 | } |
| 1481 | |
| 1482 | |
| 1483 | void MacroAssembler::Jump(Address destination, RelocInfo::Mode rmode) { |
| 1484 | movq(kScratchRegister, destination, rmode); |
| 1485 | jmp(kScratchRegister); |
| 1486 | } |
| 1487 | |
| 1488 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1489 | void MacroAssembler::Jump(Handle<Code> code_object, RelocInfo::Mode rmode) { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1490 | // TODO(X64): Inline this |
| 1491 | jmp(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1492 | } |
| 1493 | |
| 1494 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1495 | void MacroAssembler::Call(ExternalReference ext) { |
| 1496 | movq(kScratchRegister, ext); |
| 1497 | call(kScratchRegister); |
| 1498 | } |
| 1499 | |
| 1500 | |
| 1501 | void MacroAssembler::Call(Address destination, RelocInfo::Mode rmode) { |
| 1502 | movq(kScratchRegister, destination, rmode); |
| 1503 | call(kScratchRegister); |
| 1504 | } |
| 1505 | |
| 1506 | |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1507 | void MacroAssembler::Call(Handle<Code> code_object, RelocInfo::Mode rmode) { |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1508 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1509 | WriteRecordedPositions(); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 1510 | call(code_object, rmode); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1511 | } |
| 1512 | |
| 1513 | |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1514 | void MacroAssembler::PushTryHandler(CodeLocation try_location, |
| 1515 | HandlerType type) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1516 | // Adjust this code if not the case. |
| 1517 | ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
| 1518 | |
| 1519 | // The pc (return address) is already on TOS. This code pushes state, |
| 1520 | // frame pointer and current handler. Check that they are expected |
| 1521 | // next on the stack, in that order. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1522 | ASSERT_EQ(StackHandlerConstants::kStateOffset, |
| 1523 | StackHandlerConstants::kPCOffset - kPointerSize); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1524 | ASSERT_EQ(StackHandlerConstants::kFPOffset, |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1525 | StackHandlerConstants::kStateOffset - kPointerSize); |
| 1526 | ASSERT_EQ(StackHandlerConstants::kNextOffset, |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1527 | StackHandlerConstants::kFPOffset - kPointerSize); |
| 1528 | |
| 1529 | if (try_location == IN_JAVASCRIPT) { |
| 1530 | if (type == TRY_CATCH_HANDLER) { |
| 1531 | push(Immediate(StackHandler::TRY_CATCH)); |
| 1532 | } else { |
| 1533 | push(Immediate(StackHandler::TRY_FINALLY)); |
| 1534 | } |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1535 | push(rbp); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1536 | } else { |
| 1537 | ASSERT(try_location == IN_JS_ENTRY); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1538 | // The frame pointer does not point to a JS frame so we save NULL |
| 1539 | // for rbp. We expect the code throwing an exception to check rbp |
| 1540 | // before dereferencing it to restore the context. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1541 | push(Immediate(StackHandler::ENTRY)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1542 | push(Immediate(0)); // NULL frame pointer. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1543 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1544 | // Save the current handler. |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1545 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1546 | push(Operand(kScratchRegister, 0)); |
ager@chromium.org | e2902be | 2009-06-08 12:21:35 +0000 | [diff] [blame] | 1547 | // Link this handler. |
| 1548 | movq(Operand(kScratchRegister, 0), rsp); |
| 1549 | } |
| 1550 | |
| 1551 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 1552 | void MacroAssembler::PopTryHandler() { |
| 1553 | ASSERT_EQ(0, StackHandlerConstants::kNextOffset); |
| 1554 | // Unlink this handler. |
| 1555 | movq(kScratchRegister, ExternalReference(Top::k_handler_address)); |
| 1556 | pop(Operand(kScratchRegister, 0)); |
| 1557 | // Remove the remaining fields. |
| 1558 | addq(rsp, Immediate(StackHandlerConstants::kSize - kPointerSize)); |
| 1559 | } |
| 1560 | |
| 1561 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1562 | void MacroAssembler::Ret() { |
| 1563 | ret(0); |
| 1564 | } |
| 1565 | |
| 1566 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1567 | void MacroAssembler::FCmp() { |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 1568 | fucomip(); |
| 1569 | ffree(0); |
| 1570 | fincstp(); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1571 | } |
| 1572 | |
| 1573 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1574 | void MacroAssembler::CmpObjectType(Register heap_object, |
| 1575 | InstanceType type, |
| 1576 | Register map) { |
| 1577 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1578 | CmpInstanceType(map, type); |
| 1579 | } |
| 1580 | |
| 1581 | |
| 1582 | void MacroAssembler::CmpInstanceType(Register map, InstanceType type) { |
| 1583 | cmpb(FieldOperand(map, Map::kInstanceTypeOffset), |
| 1584 | Immediate(static_cast<int8_t>(type))); |
| 1585 | } |
| 1586 | |
| 1587 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 1588 | Condition MacroAssembler::IsObjectStringType(Register heap_object, |
| 1589 | Register map, |
| 1590 | Register instance_type) { |
| 1591 | movq(map, FieldOperand(heap_object, HeapObject::kMapOffset)); |
| 1592 | movzxbl(instance_type, FieldOperand(map, Map::kInstanceTypeOffset)); |
| 1593 | ASSERT(kNotStringTag != 0); |
| 1594 | testb(instance_type, Immediate(kIsNotStringMask)); |
| 1595 | return zero; |
| 1596 | } |
| 1597 | |
| 1598 | |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1599 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 1600 | Register result, |
| 1601 | Label* miss) { |
| 1602 | // Check that the receiver isn't a smi. |
| 1603 | testl(function, Immediate(kSmiTagMask)); |
| 1604 | j(zero, miss); |
| 1605 | |
| 1606 | // Check that the function really is a function. |
| 1607 | CmpObjectType(function, JS_FUNCTION_TYPE, result); |
| 1608 | j(not_equal, miss); |
| 1609 | |
| 1610 | // Make sure that the function has an instance prototype. |
| 1611 | Label non_instance; |
| 1612 | testb(FieldOperand(result, Map::kBitFieldOffset), |
| 1613 | Immediate(1 << Map::kHasNonInstancePrototype)); |
| 1614 | j(not_zero, &non_instance); |
| 1615 | |
| 1616 | // Get the prototype or initial map from the function. |
| 1617 | movq(result, |
| 1618 | FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1619 | |
| 1620 | // If the prototype or initial map is the hole, don't return it and |
| 1621 | // simply miss the cache instead. This will allow us to allocate a |
| 1622 | // prototype object on-demand in the runtime system. |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 1623 | CompareRoot(result, Heap::kTheHoleValueRootIndex); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1624 | j(equal, miss); |
| 1625 | |
| 1626 | // If the function does not have an initial map, we're done. |
| 1627 | Label done; |
| 1628 | CmpObjectType(result, MAP_TYPE, kScratchRegister); |
| 1629 | j(not_equal, &done); |
| 1630 | |
| 1631 | // Get the prototype from the initial map. |
| 1632 | movq(result, FieldOperand(result, Map::kPrototypeOffset)); |
| 1633 | jmp(&done); |
| 1634 | |
| 1635 | // Non-instance prototype: Fetch prototype from constructor field |
| 1636 | // in initial map. |
| 1637 | bind(&non_instance); |
| 1638 | movq(result, FieldOperand(result, Map::kConstructorOffset)); |
| 1639 | |
| 1640 | // All done. |
| 1641 | bind(&done); |
| 1642 | } |
| 1643 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1644 | |
| 1645 | void MacroAssembler::SetCounter(StatsCounter* counter, int value) { |
| 1646 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1647 | movq(kScratchRegister, ExternalReference(counter)); |
| 1648 | movl(Operand(kScratchRegister, 0), Immediate(value)); |
| 1649 | } |
| 1650 | } |
| 1651 | |
| 1652 | |
| 1653 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value) { |
| 1654 | ASSERT(value > 0); |
| 1655 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1656 | movq(kScratchRegister, ExternalReference(counter)); |
| 1657 | Operand operand(kScratchRegister, 0); |
| 1658 | if (value == 1) { |
| 1659 | incl(operand); |
| 1660 | } else { |
| 1661 | addl(operand, Immediate(value)); |
| 1662 | } |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value) { |
| 1668 | ASSERT(value > 0); |
| 1669 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 1670 | movq(kScratchRegister, ExternalReference(counter)); |
| 1671 | Operand operand(kScratchRegister, 0); |
| 1672 | if (value == 1) { |
| 1673 | decl(operand); |
| 1674 | } else { |
| 1675 | subl(operand, Immediate(value)); |
| 1676 | } |
| 1677 | } |
| 1678 | } |
| 1679 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1680 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 1681 | |
| 1682 | void MacroAssembler::PushRegistersFromMemory(RegList regs) { |
| 1683 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1684 | // Push the content of the memory location to the stack. |
| 1685 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 1686 | int r = JSCallerSavedCode(i); |
| 1687 | if ((regs & (1 << r)) != 0) { |
| 1688 | ExternalReference reg_addr = |
| 1689 | ExternalReference(Debug_Address::Register(i)); |
| 1690 | movq(kScratchRegister, reg_addr); |
| 1691 | push(Operand(kScratchRegister, 0)); |
| 1692 | } |
| 1693 | } |
| 1694 | } |
| 1695 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1696 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1697 | void MacroAssembler::SaveRegistersToMemory(RegList regs) { |
| 1698 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1699 | // Copy the content of registers to memory location. |
| 1700 | for (int i = 0; i < kNumJSCallerSaved; i++) { |
| 1701 | int r = JSCallerSavedCode(i); |
| 1702 | if ((regs & (1 << r)) != 0) { |
| 1703 | Register reg = { r }; |
| 1704 | ExternalReference reg_addr = |
| 1705 | ExternalReference(Debug_Address::Register(i)); |
| 1706 | movq(kScratchRegister, reg_addr); |
| 1707 | movq(Operand(kScratchRegister, 0), reg); |
| 1708 | } |
| 1709 | } |
| 1710 | } |
| 1711 | |
| 1712 | |
| 1713 | void MacroAssembler::RestoreRegistersFromMemory(RegList regs) { |
| 1714 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1715 | // Copy the content of memory location to registers. |
| 1716 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1717 | int r = JSCallerSavedCode(i); |
| 1718 | if ((regs & (1 << r)) != 0) { |
| 1719 | Register reg = { r }; |
| 1720 | ExternalReference reg_addr = |
| 1721 | ExternalReference(Debug_Address::Register(i)); |
| 1722 | movq(kScratchRegister, reg_addr); |
| 1723 | movq(reg, Operand(kScratchRegister, 0)); |
| 1724 | } |
| 1725 | } |
| 1726 | } |
| 1727 | |
| 1728 | |
| 1729 | void MacroAssembler::PopRegistersToMemory(RegList regs) { |
| 1730 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1731 | // Pop the content from the stack to the memory location. |
| 1732 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1733 | int r = JSCallerSavedCode(i); |
| 1734 | if ((regs & (1 << r)) != 0) { |
| 1735 | ExternalReference reg_addr = |
| 1736 | ExternalReference(Debug_Address::Register(i)); |
| 1737 | movq(kScratchRegister, reg_addr); |
| 1738 | pop(Operand(kScratchRegister, 0)); |
| 1739 | } |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | |
| 1744 | void MacroAssembler::CopyRegistersFromStackToMemory(Register base, |
| 1745 | Register scratch, |
| 1746 | RegList regs) { |
| 1747 | ASSERT(!scratch.is(kScratchRegister)); |
| 1748 | ASSERT(!base.is(kScratchRegister)); |
| 1749 | ASSERT(!base.is(scratch)); |
| 1750 | ASSERT((regs & ~kJSCallerSaved) == 0); |
| 1751 | // Copy the content of the stack to the memory location and adjust base. |
| 1752 | for (int i = kNumJSCallerSaved - 1; i >= 0; i--) { |
| 1753 | int r = JSCallerSavedCode(i); |
| 1754 | if ((regs & (1 << r)) != 0) { |
| 1755 | movq(scratch, Operand(base, 0)); |
| 1756 | ExternalReference reg_addr = |
| 1757 | ExternalReference(Debug_Address::Register(i)); |
| 1758 | movq(kScratchRegister, reg_addr); |
| 1759 | movq(Operand(kScratchRegister, 0), scratch); |
| 1760 | lea(base, Operand(base, kPointerSize)); |
| 1761 | } |
| 1762 | } |
| 1763 | } |
| 1764 | |
| 1765 | #endif // ENABLE_DEBUGGER_SUPPORT |
| 1766 | |
| 1767 | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1768 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) { |
| 1769 | bool resolved; |
| 1770 | Handle<Code> code = ResolveBuiltin(id, &resolved); |
| 1771 | |
| 1772 | // Calls are not allowed in some stubs. |
| 1773 | ASSERT(flag == JUMP_FUNCTION || allow_stub_calls()); |
| 1774 | |
| 1775 | // Rely on the assertion to check that the number of provided |
| 1776 | // arguments match the expected number of arguments. Fake a |
| 1777 | // parameter count to avoid emitting code to do the check. |
| 1778 | ParameterCount expected(0); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1779 | InvokeCode(Handle<Code>(code), |
| 1780 | expected, |
| 1781 | expected, |
| 1782 | RelocInfo::CODE_TARGET, |
| 1783 | flag); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1784 | |
| 1785 | const char* name = Builtins::GetName(id); |
| 1786 | int argc = Builtins::GetArgumentsCount(id); |
| 1787 | // The target address for the jump is stored as an immediate at offset |
| 1788 | // kInvokeCodeAddressOffset. |
| 1789 | if (!resolved) { |
| 1790 | uint32_t flags = |
| 1791 | Bootstrapper::FixupFlagsArgumentsCount::encode(argc) | |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1792 | Bootstrapper::FixupFlagsUseCodeObject::encode(false); |
| 1793 | Unresolved entry = |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 1794 | { pc_offset() - kCallTargetAddressOffset, flags, name }; |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1795 | unresolved_.Add(entry); |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1800 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 1801 | const ParameterCount& actual, |
| 1802 | Handle<Code> code_constant, |
| 1803 | Register code_register, |
| 1804 | Label* done, |
| 1805 | InvokeFlag flag) { |
| 1806 | bool definitely_matches = false; |
| 1807 | Label invoke; |
| 1808 | if (expected.is_immediate()) { |
| 1809 | ASSERT(actual.is_immediate()); |
| 1810 | if (expected.immediate() == actual.immediate()) { |
| 1811 | definitely_matches = true; |
| 1812 | } else { |
| 1813 | movq(rax, Immediate(actual.immediate())); |
| 1814 | if (expected.immediate() == |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1815 | SharedFunctionInfo::kDontAdaptArgumentsSentinel) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1816 | // Don't worry about adapting arguments for built-ins that |
| 1817 | // don't want that done. Skip adaption code by making it look |
| 1818 | // like we have a match between expected and actual number of |
| 1819 | // arguments. |
| 1820 | definitely_matches = true; |
| 1821 | } else { |
| 1822 | movq(rbx, Immediate(expected.immediate())); |
| 1823 | } |
| 1824 | } |
| 1825 | } else { |
| 1826 | if (actual.is_immediate()) { |
| 1827 | // Expected is in register, actual is immediate. This is the |
| 1828 | // case when we invoke function values without going through the |
| 1829 | // IC mechanism. |
| 1830 | cmpq(expected.reg(), Immediate(actual.immediate())); |
| 1831 | j(equal, &invoke); |
| 1832 | ASSERT(expected.reg().is(rbx)); |
| 1833 | movq(rax, Immediate(actual.immediate())); |
| 1834 | } else if (!expected.reg().is(actual.reg())) { |
| 1835 | // Both expected and actual are in (different) registers. This |
| 1836 | // is the case when we invoke functions using call and apply. |
| 1837 | cmpq(expected.reg(), actual.reg()); |
| 1838 | j(equal, &invoke); |
| 1839 | ASSERT(actual.reg().is(rax)); |
| 1840 | ASSERT(expected.reg().is(rbx)); |
| 1841 | } |
| 1842 | } |
| 1843 | |
| 1844 | if (!definitely_matches) { |
| 1845 | Handle<Code> adaptor = |
| 1846 | Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); |
| 1847 | if (!code_constant.is_null()) { |
| 1848 | movq(rdx, code_constant, RelocInfo::EMBEDDED_OBJECT); |
| 1849 | addq(rdx, Immediate(Code::kHeaderSize - kHeapObjectTag)); |
| 1850 | } else if (!code_register.is(rdx)) { |
| 1851 | movq(rdx, code_register); |
| 1852 | } |
| 1853 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1854 | if (flag == CALL_FUNCTION) { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1855 | Call(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1856 | jmp(done); |
| 1857 | } else { |
sgjesse@chromium.org | 911335c | 2009-08-19 12:59:44 +0000 | [diff] [blame] | 1858 | Jump(adaptor, RelocInfo::CODE_TARGET); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1859 | } |
| 1860 | bind(&invoke); |
| 1861 | } |
| 1862 | } |
| 1863 | |
| 1864 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1865 | void MacroAssembler::InvokeCode(Register code, |
| 1866 | const ParameterCount& expected, |
| 1867 | const ParameterCount& actual, |
| 1868 | InvokeFlag flag) { |
| 1869 | Label done; |
| 1870 | InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); |
| 1871 | if (flag == CALL_FUNCTION) { |
| 1872 | call(code); |
| 1873 | } else { |
| 1874 | ASSERT(flag == JUMP_FUNCTION); |
| 1875 | jmp(code); |
| 1876 | } |
| 1877 | bind(&done); |
| 1878 | } |
| 1879 | |
| 1880 | |
| 1881 | void MacroAssembler::InvokeCode(Handle<Code> code, |
| 1882 | const ParameterCount& expected, |
| 1883 | const ParameterCount& actual, |
| 1884 | RelocInfo::Mode rmode, |
| 1885 | InvokeFlag flag) { |
| 1886 | Label done; |
| 1887 | Register dummy = rax; |
| 1888 | InvokePrologue(expected, actual, code, dummy, &done, flag); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1889 | if (flag == CALL_FUNCTION) { |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1890 | Call(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1891 | } else { |
| 1892 | ASSERT(flag == JUMP_FUNCTION); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1893 | Jump(code, rmode); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1894 | } |
| 1895 | bind(&done); |
| 1896 | } |
| 1897 | |
| 1898 | |
| 1899 | void MacroAssembler::InvokeFunction(Register function, |
| 1900 | const ParameterCount& actual, |
| 1901 | InvokeFlag flag) { |
| 1902 | ASSERT(function.is(rdi)); |
| 1903 | movq(rdx, FieldOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 1904 | movq(rsi, FieldOperand(function, JSFunction::kContextOffset)); |
ager@chromium.org | 3e87580 | 2009-06-29 08:26:34 +0000 | [diff] [blame] | 1905 | movsxlq(rbx, |
| 1906 | FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1907 | movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset)); |
ager@chromium.org | 5aa501c | 2009-06-23 07:57:28 +0000 | [diff] [blame] | 1908 | // 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] | 1909 | // the executable code. |
| 1910 | lea(rdx, FieldOperand(rdx, Code::kHeaderSize)); |
| 1911 | |
| 1912 | ParameterCount expected(rbx); |
| 1913 | InvokeCode(rdx, expected, actual, flag); |
| 1914 | } |
| 1915 | |
| 1916 | |
| 1917 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 1918 | push(rbp); |
| 1919 | movq(rbp, rsp); |
| 1920 | push(rsi); // Context. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1921 | Push(Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1922 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 1923 | push(kScratchRegister); |
| 1924 | if (FLAG_debug_code) { |
| 1925 | movq(kScratchRegister, |
| 1926 | Factory::undefined_value(), |
| 1927 | RelocInfo::EMBEDDED_OBJECT); |
| 1928 | cmpq(Operand(rsp, 0), kScratchRegister); |
| 1929 | Check(not_equal, "code object not properly patched"); |
| 1930 | } |
| 1931 | } |
| 1932 | |
| 1933 | |
| 1934 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 1935 | if (FLAG_debug_code) { |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1936 | Move(kScratchRegister, Smi::FromInt(type)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1937 | cmpq(Operand(rbp, StandardFrameConstants::kMarkerOffset), kScratchRegister); |
| 1938 | Check(equal, "stack frame types must match"); |
| 1939 | } |
| 1940 | movq(rsp, rbp); |
| 1941 | pop(rbp); |
| 1942 | } |
| 1943 | |
| 1944 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1945 | void MacroAssembler::EnterExitFrame(ExitFrame::Mode mode, int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1946 | // Setup the frame structure on the stack. |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1947 | // 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] | 1948 | ASSERT(ExitFrameConstants::kCallerSPDisplacement == +2 * kPointerSize); |
| 1949 | ASSERT(ExitFrameConstants::kCallerPCOffset == +1 * kPointerSize); |
| 1950 | ASSERT(ExitFrameConstants::kCallerFPOffset == 0 * kPointerSize); |
| 1951 | push(rbp); |
| 1952 | movq(rbp, rsp); |
| 1953 | |
| 1954 | // Reserve room for entry stack pointer and push the debug marker. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 1955 | ASSERT(ExitFrameConstants::kSPOffset == -1 * kPointerSize); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1956 | push(Immediate(0)); // saved entry sp, patched before call |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1957 | if (mode == ExitFrame::MODE_DEBUG) { |
| 1958 | push(Immediate(0)); |
| 1959 | } else { |
| 1960 | movq(kScratchRegister, CodeObject(), RelocInfo::EMBEDDED_OBJECT); |
| 1961 | push(kScratchRegister); |
| 1962 | } |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1963 | |
| 1964 | // Save the frame pointer and the context in top. |
| 1965 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 1966 | ExternalReference context_address(Top::k_context_address); |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1967 | movq(r14, rax); // Backup rax before we use it. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1968 | |
| 1969 | movq(rax, rbp); |
| 1970 | store_rax(c_entry_fp_address); |
| 1971 | movq(rax, rsi); |
| 1972 | store_rax(context_address); |
| 1973 | |
| 1974 | // Setup argv in callee-saved register r15. It is reused in LeaveExitFrame, |
| 1975 | // so it must be retained across the C-call. |
| 1976 | int offset = StandardFrameConstants::kCallerSPOffset - kPointerSize; |
kasperl@chromium.org | 86f77b7 | 2009-07-06 08:21:57 +0000 | [diff] [blame] | 1977 | lea(r15, Operand(rbp, r14, times_pointer_size, offset)); |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1978 | |
| 1979 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 1980 | // Save the state of all registers to the stack from the memory |
| 1981 | // location. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 1982 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 1983 | // TODO(1243899): This should be symmetric to |
| 1984 | // CopyRegistersFromStackToMemory() but it isn't! esp is assumed |
| 1985 | // correct here, but computed for the other call. Very error |
| 1986 | // prone! FIX THIS. Actually there are deeper problems with |
| 1987 | // register saving than this asymmetry (see the bug report |
| 1988 | // associated with this issue). |
| 1989 | PushRegistersFromMemory(kJSCallerSaved); |
| 1990 | } |
| 1991 | #endif |
| 1992 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 1993 | #ifdef _WIN64 |
| 1994 | // Reserve space on stack for result and argument structures, if necessary. |
| 1995 | int result_stack_space = (result_size < 2) ? 0 : result_size * kPointerSize; |
| 1996 | // Reserve space for the Arguments object. The Windows 64-bit ABI |
| 1997 | // requires us to pass this structure as a pointer to its location on |
| 1998 | // the stack. The structure contains 2 values. |
| 1999 | int argument_stack_space = 2 * kPointerSize; |
| 2000 | // We also need backing space for 4 parameters, even though |
| 2001 | // we only pass one or two parameter, and it is in a register. |
| 2002 | int argument_mirror_space = 4 * kPointerSize; |
| 2003 | int total_stack_space = |
| 2004 | argument_mirror_space + argument_stack_space + result_stack_space; |
| 2005 | subq(rsp, Immediate(total_stack_space)); |
| 2006 | #endif |
| 2007 | |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2008 | // Get the required frame alignment for the OS. |
| 2009 | static const int kFrameAlignment = OS::ActivationFrameAlignment(); |
| 2010 | if (kFrameAlignment > 0) { |
| 2011 | ASSERT(IsPowerOf2(kFrameAlignment)); |
| 2012 | movq(kScratchRegister, Immediate(-kFrameAlignment)); |
| 2013 | and_(rsp, kScratchRegister); |
| 2014 | } |
| 2015 | |
| 2016 | // Patch the saved entry sp. |
| 2017 | movq(Operand(rbp, ExitFrameConstants::kSPOffset), rsp); |
| 2018 | } |
| 2019 | |
| 2020 | |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2021 | void MacroAssembler::LeaveExitFrame(ExitFrame::Mode mode, int result_size) { |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2022 | // Registers: |
| 2023 | // r15 : argv |
| 2024 | #ifdef ENABLE_DEBUGGER_SUPPORT |
| 2025 | // Restore the memory copy of the registers by digging them out from |
| 2026 | // the stack. This is needed to allow nested break points. |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2027 | if (mode == ExitFrame::MODE_DEBUG) { |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2028 | // It's okay to clobber register rbx below because we don't need |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2029 | // the function pointer after this. |
| 2030 | const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
ager@chromium.org | c4c9272 | 2009-11-18 14:12:51 +0000 | [diff] [blame] | 2031 | int kOffset = ExitFrameConstants::kCodeOffset - kCallerSavedSize; |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2032 | lea(rbx, Operand(rbp, kOffset)); |
| 2033 | CopyRegistersFromStackToMemory(rbx, rcx, kJSCallerSaved); |
| 2034 | } |
| 2035 | #endif |
| 2036 | |
| 2037 | // Get the return address from the stack and restore the frame pointer. |
| 2038 | movq(rcx, Operand(rbp, 1 * kPointerSize)); |
| 2039 | movq(rbp, Operand(rbp, 0 * kPointerSize)); |
| 2040 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2041 | // Pop everything up to and including the arguments and the receiver |
| 2042 | // from the caller stack. |
ager@chromium.org | eadaf22 | 2009-06-16 09:43:10 +0000 | [diff] [blame] | 2043 | lea(rsp, Operand(r15, 1 * kPointerSize)); |
| 2044 | |
| 2045 | // Restore current context from top and clear it in debug mode. |
| 2046 | ExternalReference context_address(Top::k_context_address); |
| 2047 | movq(kScratchRegister, context_address); |
| 2048 | movq(rsi, Operand(kScratchRegister, 0)); |
| 2049 | #ifdef DEBUG |
| 2050 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2051 | #endif |
| 2052 | |
| 2053 | // Push the return address to get ready to return. |
| 2054 | push(rcx); |
| 2055 | |
| 2056 | // Clear the top frame. |
| 2057 | ExternalReference c_entry_fp_address(Top::k_c_entry_fp_address); |
| 2058 | movq(kScratchRegister, c_entry_fp_address); |
| 2059 | movq(Operand(kScratchRegister, 0), Immediate(0)); |
| 2060 | } |
| 2061 | |
| 2062 | |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2063 | Register MacroAssembler::CheckMaps(JSObject* object, |
| 2064 | Register object_reg, |
| 2065 | JSObject* holder, |
| 2066 | Register holder_reg, |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2067 | Register scratch, |
| 2068 | Label* miss) { |
| 2069 | // Make sure there's no overlap between scratch and the other |
| 2070 | // registers. |
| 2071 | ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg)); |
| 2072 | |
| 2073 | // Keep track of the current object in register reg. On the first |
| 2074 | // iteration, reg is an alias for object_reg, on later iterations, |
| 2075 | // it is an alias for holder_reg. |
| 2076 | Register reg = object_reg; |
| 2077 | int depth = 1; |
| 2078 | |
| 2079 | // Check the maps in the prototype chain. |
| 2080 | // Traverse the prototype chain from the object and do map checks. |
| 2081 | while (object != holder) { |
| 2082 | depth++; |
| 2083 | |
| 2084 | // Only global objects and objects that do not require access |
| 2085 | // checks are allowed in stubs. |
| 2086 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 2087 | |
| 2088 | JSObject* prototype = JSObject::cast(object->GetPrototype()); |
| 2089 | if (Heap::InNewSpace(prototype)) { |
| 2090 | // Get the map of the current object. |
| 2091 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 2092 | Cmp(scratch, Handle<Map>(object->map())); |
| 2093 | // Branch on the result of the map check. |
| 2094 | j(not_equal, miss); |
| 2095 | // Check access rights to the global object. This has to happen |
| 2096 | // after the map check so that we know that the object is |
| 2097 | // actually a global object. |
| 2098 | if (object->IsJSGlobalProxy()) { |
| 2099 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2100 | |
| 2101 | // Restore scratch register to be the map of the object. |
| 2102 | // We load the prototype from the map in the scratch register. |
| 2103 | movq(scratch, FieldOperand(reg, HeapObject::kMapOffset)); |
| 2104 | } |
| 2105 | // The prototype is in new space; we cannot store a reference |
| 2106 | // to it in the code. Load it from the map. |
| 2107 | reg = holder_reg; // from now the object is in holder_reg |
| 2108 | movq(reg, FieldOperand(scratch, Map::kPrototypeOffset)); |
| 2109 | |
| 2110 | } else { |
| 2111 | // Check the map of the current object. |
| 2112 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), |
| 2113 | Handle<Map>(object->map())); |
| 2114 | // Branch on the result of the map check. |
| 2115 | j(not_equal, miss); |
| 2116 | // Check access rights to the global object. This has to happen |
| 2117 | // after the map check so that we know that the object is |
| 2118 | // actually a global object. |
| 2119 | if (object->IsJSGlobalProxy()) { |
| 2120 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2121 | } |
| 2122 | // The prototype is in old space; load it directly. |
| 2123 | reg = holder_reg; // from now the object is in holder_reg |
| 2124 | Move(reg, Handle<JSObject>(prototype)); |
| 2125 | } |
| 2126 | |
| 2127 | // Go to the next object in the prototype chain. |
| 2128 | object = prototype; |
| 2129 | } |
| 2130 | |
| 2131 | // Check the holder map. |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2132 | Cmp(FieldOperand(reg, HeapObject::kMapOffset), Handle<Map>(holder->map())); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2133 | j(not_equal, miss); |
| 2134 | |
| 2135 | // Log the check depth. |
| 2136 | LOG(IntEvent("check-maps-depth", depth)); |
| 2137 | |
| 2138 | // Perform security check for access to the global object and return |
| 2139 | // the holder register. |
| 2140 | ASSERT(object == holder); |
| 2141 | ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); |
| 2142 | if (object->IsJSGlobalProxy()) { |
| 2143 | CheckAccessGlobalProxy(reg, scratch, miss); |
| 2144 | } |
| 2145 | return reg; |
| 2146 | } |
| 2147 | |
| 2148 | |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2149 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 2150 | Register scratch, |
| 2151 | Label* miss) { |
| 2152 | Label same_contexts; |
| 2153 | |
| 2154 | ASSERT(!holder_reg.is(scratch)); |
| 2155 | ASSERT(!scratch.is(kScratchRegister)); |
| 2156 | // Load current lexical context from the stack frame. |
| 2157 | movq(scratch, Operand(rbp, StandardFrameConstants::kContextOffset)); |
| 2158 | |
| 2159 | // When generating debug code, make sure the lexical context is set. |
| 2160 | if (FLAG_debug_code) { |
| 2161 | cmpq(scratch, Immediate(0)); |
| 2162 | Check(not_equal, "we should not have an empty lexical context"); |
| 2163 | } |
| 2164 | // Load the global context of the current context. |
| 2165 | int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 2166 | movq(scratch, FieldOperand(scratch, offset)); |
| 2167 | movq(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 2168 | |
| 2169 | // Check the context is a global context. |
| 2170 | if (FLAG_debug_code) { |
| 2171 | Cmp(FieldOperand(scratch, HeapObject::kMapOffset), |
| 2172 | Factory::global_context_map()); |
| 2173 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2174 | } |
| 2175 | |
| 2176 | // Check if both contexts are the same. |
| 2177 | cmpq(scratch, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
| 2178 | j(equal, &same_contexts); |
| 2179 | |
| 2180 | // Compare security tokens. |
| 2181 | // Check that the security token in the calling global object is |
| 2182 | // compatible with the security token in the receiving global |
| 2183 | // object. |
| 2184 | |
| 2185 | // Check the context is a global context. |
| 2186 | if (FLAG_debug_code) { |
| 2187 | // Preserve original value of holder_reg. |
| 2188 | push(holder_reg); |
| 2189 | movq(holder_reg, FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2190 | CompareRoot(holder_reg, Heap::kNullValueRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2191 | Check(not_equal, "JSGlobalProxy::context() should not be null."); |
| 2192 | |
| 2193 | // Read the first word and compare to global_context_map(), |
| 2194 | movq(holder_reg, FieldOperand(holder_reg, HeapObject::kMapOffset)); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2195 | CompareRoot(holder_reg, Heap::kGlobalContextMapRootIndex); |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2196 | Check(equal, "JSGlobalObject::global_context should be a global context."); |
| 2197 | pop(holder_reg); |
| 2198 | } |
| 2199 | |
| 2200 | movq(kScratchRegister, |
| 2201 | FieldOperand(holder_reg, JSGlobalProxy::kContextOffset)); |
christian.plesner.hansen@gmail.com | 9d58c2b | 2009-10-16 11:48:38 +0000 | [diff] [blame] | 2202 | int token_offset = |
| 2203 | Context::kHeaderSize + Context::SECURITY_TOKEN_INDEX * kPointerSize; |
kasperl@chromium.org | e959c18 | 2009-07-27 08:59:04 +0000 | [diff] [blame] | 2204 | movq(scratch, FieldOperand(scratch, token_offset)); |
| 2205 | cmpq(scratch, FieldOperand(kScratchRegister, token_offset)); |
| 2206 | j(not_equal, miss); |
| 2207 | |
| 2208 | bind(&same_contexts); |
| 2209 | } |
| 2210 | |
| 2211 | |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2212 | void MacroAssembler::LoadAllocationTopHelper(Register result, |
| 2213 | Register result_end, |
| 2214 | Register scratch, |
| 2215 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2216 | ExternalReference new_space_allocation_top = |
| 2217 | ExternalReference::new_space_allocation_top_address(); |
| 2218 | |
| 2219 | // Just return if allocation top is already known. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2220 | if ((flags & RESULT_CONTAINS_TOP) != 0) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2221 | // No use of scratch if allocation top is provided. |
| 2222 | ASSERT(scratch.is(no_reg)); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2223 | #ifdef DEBUG |
| 2224 | // Assert that result actually contains top on entry. |
| 2225 | movq(kScratchRegister, new_space_allocation_top); |
| 2226 | cmpq(result, Operand(kScratchRegister, 0)); |
| 2227 | Check(equal, "Unexpected allocation top"); |
| 2228 | #endif |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2229 | return; |
| 2230 | } |
| 2231 | |
| 2232 | // Move address of new object to result. Use scratch register if available. |
| 2233 | if (scratch.is(no_reg)) { |
| 2234 | movq(kScratchRegister, new_space_allocation_top); |
| 2235 | movq(result, Operand(kScratchRegister, 0)); |
| 2236 | } else { |
| 2237 | ASSERT(!scratch.is(result_end)); |
| 2238 | movq(scratch, new_space_allocation_top); |
| 2239 | movq(result, Operand(scratch, 0)); |
| 2240 | } |
| 2241 | } |
| 2242 | |
| 2243 | |
| 2244 | void MacroAssembler::UpdateAllocationTopHelper(Register result_end, |
| 2245 | Register scratch) { |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2246 | if (FLAG_debug_code) { |
| 2247 | testq(result_end, Immediate(kObjectAlignmentMask)); |
| 2248 | Check(zero, "Unaligned allocation in new space"); |
| 2249 | } |
| 2250 | |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2251 | ExternalReference new_space_allocation_top = |
| 2252 | ExternalReference::new_space_allocation_top_address(); |
| 2253 | |
| 2254 | // Update new top. |
| 2255 | if (result_end.is(rax)) { |
| 2256 | // rax can be stored directly to a memory location. |
| 2257 | store_rax(new_space_allocation_top); |
| 2258 | } else { |
| 2259 | // Register required - use scratch provided if available. |
| 2260 | if (scratch.is(no_reg)) { |
| 2261 | movq(kScratchRegister, new_space_allocation_top); |
| 2262 | movq(Operand(kScratchRegister, 0), result_end); |
| 2263 | } else { |
| 2264 | movq(Operand(scratch, 0), result_end); |
| 2265 | } |
| 2266 | } |
| 2267 | } |
| 2268 | |
| 2269 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2270 | void MacroAssembler::AllocateInNewSpace(int object_size, |
| 2271 | Register result, |
| 2272 | Register result_end, |
| 2273 | Register scratch, |
| 2274 | Label* gc_required, |
| 2275 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2276 | ASSERT(!result.is(result_end)); |
| 2277 | |
| 2278 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2279 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2280 | |
| 2281 | // Calculate new top and bail out if new space is exhausted. |
| 2282 | ExternalReference new_space_allocation_limit = |
| 2283 | ExternalReference::new_space_allocation_limit_address(); |
| 2284 | lea(result_end, Operand(result, object_size)); |
| 2285 | movq(kScratchRegister, new_space_allocation_limit); |
| 2286 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2287 | j(above, gc_required); |
| 2288 | |
| 2289 | // Update allocation top. |
| 2290 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2291 | |
| 2292 | // Tag the result if requested. |
| 2293 | if ((flags & TAG_OBJECT) != 0) { |
| 2294 | addq(result, Immediate(kHeapObjectTag)); |
| 2295 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2296 | } |
| 2297 | |
| 2298 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2299 | void MacroAssembler::AllocateInNewSpace(int header_size, |
| 2300 | ScaleFactor element_size, |
| 2301 | Register element_count, |
| 2302 | Register result, |
| 2303 | Register result_end, |
| 2304 | Register scratch, |
| 2305 | Label* gc_required, |
| 2306 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2307 | ASSERT(!result.is(result_end)); |
| 2308 | |
| 2309 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2310 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2311 | |
| 2312 | // Calculate new top and bail out if new space is exhausted. |
| 2313 | ExternalReference new_space_allocation_limit = |
| 2314 | ExternalReference::new_space_allocation_limit_address(); |
| 2315 | lea(result_end, Operand(result, element_count, element_size, header_size)); |
| 2316 | movq(kScratchRegister, new_space_allocation_limit); |
| 2317 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2318 | j(above, gc_required); |
| 2319 | |
| 2320 | // Update allocation top. |
| 2321 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2322 | |
| 2323 | // Tag the result if requested. |
| 2324 | if ((flags & TAG_OBJECT) != 0) { |
| 2325 | addq(result, Immediate(kHeapObjectTag)); |
| 2326 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2327 | } |
| 2328 | |
| 2329 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 2330 | void MacroAssembler::AllocateInNewSpace(Register object_size, |
| 2331 | Register result, |
| 2332 | Register result_end, |
| 2333 | Register scratch, |
| 2334 | Label* gc_required, |
| 2335 | AllocationFlags flags) { |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2336 | // Load address of new object into result. |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2337 | LoadAllocationTopHelper(result, result_end, scratch, flags); |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2338 | |
| 2339 | // Calculate new top and bail out if new space is exhausted. |
| 2340 | ExternalReference new_space_allocation_limit = |
| 2341 | ExternalReference::new_space_allocation_limit_address(); |
| 2342 | if (!object_size.is(result_end)) { |
| 2343 | movq(result_end, object_size); |
| 2344 | } |
| 2345 | addq(result_end, result); |
| 2346 | movq(kScratchRegister, new_space_allocation_limit); |
| 2347 | cmpq(result_end, Operand(kScratchRegister, 0)); |
| 2348 | j(above, gc_required); |
| 2349 | |
| 2350 | // Update allocation top. |
| 2351 | UpdateAllocationTopHelper(result_end, scratch); |
ager@chromium.org | a1645e2 | 2009-09-09 19:27:10 +0000 | [diff] [blame] | 2352 | |
| 2353 | // Tag the result if requested. |
| 2354 | if ((flags & TAG_OBJECT) != 0) { |
| 2355 | addq(result, Immediate(kHeapObjectTag)); |
| 2356 | } |
ager@chromium.org | 18ad94b | 2009-09-02 08:22:29 +0000 | [diff] [blame] | 2357 | } |
| 2358 | |
| 2359 | |
| 2360 | void MacroAssembler::UndoAllocationInNewSpace(Register object) { |
| 2361 | ExternalReference new_space_allocation_top = |
| 2362 | ExternalReference::new_space_allocation_top_address(); |
| 2363 | |
| 2364 | // Make sure the object has no tag before resetting top. |
| 2365 | and_(object, Immediate(~kHeapObjectTagMask)); |
| 2366 | movq(kScratchRegister, new_space_allocation_top); |
| 2367 | #ifdef DEBUG |
| 2368 | cmpq(object, Operand(kScratchRegister, 0)); |
| 2369 | Check(below, "Undo allocation of non allocated memory"); |
| 2370 | #endif |
| 2371 | movq(Operand(kScratchRegister, 0), object); |
| 2372 | } |
| 2373 | |
| 2374 | |
ager@chromium.org | 3811b43 | 2009-10-28 14:53:37 +0000 | [diff] [blame] | 2375 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 2376 | Register scratch, |
| 2377 | Label* gc_required) { |
| 2378 | // Allocate heap number in new space. |
| 2379 | AllocateInNewSpace(HeapNumber::kSize, |
| 2380 | result, |
| 2381 | scratch, |
| 2382 | no_reg, |
| 2383 | gc_required, |
| 2384 | TAG_OBJECT); |
| 2385 | |
| 2386 | // Set the map. |
| 2387 | LoadRoot(kScratchRegister, Heap::kHeapNumberMapRootIndex); |
| 2388 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2389 | } |
| 2390 | |
| 2391 | |
kmillikin@chromium.org | 13bd294 | 2009-12-16 15:36:05 +0000 | [diff] [blame] | 2392 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 2393 | Register length, |
| 2394 | Register scratch1, |
| 2395 | Register scratch2, |
| 2396 | Register scratch3, |
| 2397 | Label* gc_required) { |
| 2398 | // Calculate the number of bytes needed for the characters in the string while |
| 2399 | // observing object alignment. |
| 2400 | ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2401 | ASSERT(kShortSize == 2); |
| 2402 | // scratch1 = length * 2 + kObjectAlignmentMask. |
| 2403 | lea(scratch1, Operand(length, length, times_1, kObjectAlignmentMask)); |
| 2404 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
| 2405 | |
| 2406 | // Allocate two byte string in new space. |
| 2407 | AllocateInNewSpace(SeqTwoByteString::kHeaderSize, |
| 2408 | times_1, |
| 2409 | scratch1, |
| 2410 | result, |
| 2411 | scratch2, |
| 2412 | scratch3, |
| 2413 | gc_required, |
| 2414 | TAG_OBJECT); |
| 2415 | |
| 2416 | // Set the map, length and hash field. |
| 2417 | LoadRoot(kScratchRegister, Heap::kStringMapRootIndex); |
| 2418 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2419 | movl(FieldOperand(result, String::kLengthOffset), length); |
| 2420 | movl(FieldOperand(result, String::kHashFieldOffset), |
| 2421 | Immediate(String::kEmptyHashField)); |
| 2422 | } |
| 2423 | |
| 2424 | |
| 2425 | void MacroAssembler::AllocateAsciiString(Register result, |
| 2426 | Register length, |
| 2427 | Register scratch1, |
| 2428 | Register scratch2, |
| 2429 | Register scratch3, |
| 2430 | Label* gc_required) { |
| 2431 | // Calculate the number of bytes needed for the characters in the string while |
| 2432 | // observing object alignment. |
| 2433 | ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2434 | movl(scratch1, length); |
| 2435 | ASSERT(kCharSize == 1); |
| 2436 | addq(scratch1, Immediate(kObjectAlignmentMask)); |
| 2437 | and_(scratch1, Immediate(~kObjectAlignmentMask)); |
| 2438 | |
| 2439 | // Allocate ascii string in new space. |
| 2440 | AllocateInNewSpace(SeqAsciiString::kHeaderSize, |
| 2441 | times_1, |
| 2442 | scratch1, |
| 2443 | result, |
| 2444 | scratch2, |
| 2445 | scratch3, |
| 2446 | gc_required, |
| 2447 | TAG_OBJECT); |
| 2448 | |
| 2449 | // Set the map, length and hash field. |
| 2450 | LoadRoot(kScratchRegister, Heap::kAsciiStringMapRootIndex); |
| 2451 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2452 | movl(FieldOperand(result, String::kLengthOffset), length); |
| 2453 | movl(FieldOperand(result, String::kHashFieldOffset), |
| 2454 | Immediate(String::kEmptyHashField)); |
| 2455 | } |
| 2456 | |
| 2457 | |
| 2458 | void MacroAssembler::AllocateConsString(Register result, |
| 2459 | Register scratch1, |
| 2460 | Register scratch2, |
| 2461 | Label* gc_required) { |
| 2462 | // Allocate heap number in new space. |
| 2463 | AllocateInNewSpace(ConsString::kSize, |
| 2464 | result, |
| 2465 | scratch1, |
| 2466 | scratch2, |
| 2467 | gc_required, |
| 2468 | TAG_OBJECT); |
| 2469 | |
| 2470 | // Set the map. The other fields are left uninitialized. |
| 2471 | LoadRoot(kScratchRegister, Heap::kConsStringMapRootIndex); |
| 2472 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2473 | } |
| 2474 | |
| 2475 | |
| 2476 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 2477 | Register scratch1, |
| 2478 | Register scratch2, |
| 2479 | Label* gc_required) { |
| 2480 | // Allocate heap number in new space. |
| 2481 | AllocateInNewSpace(ConsString::kSize, |
| 2482 | result, |
| 2483 | scratch1, |
| 2484 | scratch2, |
| 2485 | gc_required, |
| 2486 | TAG_OBJECT); |
| 2487 | |
| 2488 | // Set the map. The other fields are left uninitialized. |
| 2489 | LoadRoot(kScratchRegister, Heap::kConsAsciiStringMapRootIndex); |
| 2490 | movq(FieldOperand(result, HeapObject::kMapOffset), kScratchRegister); |
| 2491 | } |
| 2492 | |
| 2493 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2494 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 2495 | if (context_chain_length > 0) { |
| 2496 | // Move up the chain of contexts to the context containing the slot. |
| 2497 | movq(dst, Operand(rsi, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2498 | // Load the function context (which is the incoming, outer context). |
lrn@chromium.org | d5649e3 | 2010-01-19 13:36:12 +0000 | [diff] [blame] | 2499 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2500 | for (int i = 1; i < context_chain_length; i++) { |
| 2501 | movq(dst, Operand(dst, Context::SlotOffset(Context::CLOSURE_INDEX))); |
| 2502 | movq(dst, FieldOperand(dst, JSFunction::kContextOffset)); |
| 2503 | } |
| 2504 | // The context may be an intermediate context, not a function context. |
| 2505 | movq(dst, Operand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2506 | } else { // context is the current function context. |
| 2507 | // The context may be an intermediate context, not a function context. |
| 2508 | movq(dst, Operand(rsi, Context::SlotOffset(Context::FCONTEXT_INDEX))); |
| 2509 | } |
| 2510 | } |
| 2511 | |
sgjesse@chromium.org | b302e56 | 2010-02-03 11:26:59 +0000 | [diff] [blame^] | 2512 | int MacroAssembler::ArgumentStackSlotsForCFunctionCall(int num_arguments) { |
| 2513 | // On Windows stack slots are reserved by the caller for all arguments |
| 2514 | // including the ones passed in registers. On Linux 6 arguments are passed in |
| 2515 | // registers and the caller does not reserve stack slots for them. |
| 2516 | ASSERT(num_arguments >= 0); |
| 2517 | #ifdef _WIN64 |
| 2518 | static const int kArgumentsWithoutStackSlot = 0; |
| 2519 | #else |
| 2520 | static const int kArgumentsWithoutStackSlot = 6; |
| 2521 | #endif |
| 2522 | return num_arguments > kArgumentsWithoutStackSlot ? |
| 2523 | num_arguments - kArgumentsWithoutStackSlot : 0; |
| 2524 | } |
| 2525 | |
| 2526 | void MacroAssembler::PrepareCallCFunction(int num_arguments) { |
| 2527 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 2528 | ASSERT(frame_alignment != 0); |
| 2529 | ASSERT(num_arguments >= 0); |
| 2530 | // Make stack end at alignment and allocate space for arguments and old rsp. |
| 2531 | movq(kScratchRegister, rsp); |
| 2532 | ASSERT(IsPowerOf2(frame_alignment)); |
| 2533 | int argument_slots_on_stack = |
| 2534 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2535 | subq(rsp, Immediate((argument_slots_on_stack + 1) * kPointerSize)); |
| 2536 | and_(rsp, Immediate(-frame_alignment)); |
| 2537 | movq(Operand(rsp, argument_slots_on_stack * kPointerSize), kScratchRegister); |
| 2538 | } |
| 2539 | |
| 2540 | |
| 2541 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 2542 | int num_arguments) { |
| 2543 | movq(rax, function); |
| 2544 | CallCFunction(rax, num_arguments); |
| 2545 | } |
| 2546 | |
| 2547 | |
| 2548 | void MacroAssembler::CallCFunction(Register function, int num_arguments) { |
| 2549 | call(function); |
| 2550 | ASSERT(OS::ActivationFrameAlignment() != 0); |
| 2551 | ASSERT(num_arguments >= 0); |
| 2552 | int argument_slots_on_stack = |
| 2553 | ArgumentStackSlotsForCFunctionCall(num_arguments); |
| 2554 | movq(rsp, Operand(rsp, argument_slots_on_stack * kPointerSize)); |
| 2555 | } |
| 2556 | |
sgjesse@chromium.org | ac6aa17 | 2009-12-04 12:29:05 +0000 | [diff] [blame] | 2557 | |
ager@chromium.org | 4af710e | 2009-09-15 12:20:11 +0000 | [diff] [blame] | 2558 | CodePatcher::CodePatcher(byte* address, int size) |
| 2559 | : address_(address), size_(size), masm_(address, size + Assembler::kGap) { |
| 2560 | // Create a new macro assembler pointing to the address of the code to patch. |
| 2561 | // The size is adjusted with kGap on order for the assembler to generate size |
| 2562 | // bytes of instructions without failing with buffer size constraints. |
| 2563 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2564 | } |
| 2565 | |
| 2566 | |
| 2567 | CodePatcher::~CodePatcher() { |
| 2568 | // Indicate that code has changed. |
| 2569 | CPU::FlushICache(address_, size_); |
| 2570 | |
| 2571 | // Check that the code was patched as expected. |
| 2572 | ASSERT(masm_.pc_ == address_ + size_); |
| 2573 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 2574 | } |
| 2575 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 2576 | } } // namespace v8::internal |