jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 28 | #include <limits.h> // For LONG_MIN, LONG_MAX. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 29 | |
| 30 | #include "v8.h" |
| 31 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 32 | #if V8_TARGET_ARCH_MIPS |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 33 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 34 | #include "bootstrapper.h" |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 35 | #include "codegen.h" |
machenbach@chromium.org | c1789ee | 2013-07-05 07:09:57 +0000 | [diff] [blame] | 36 | #include "cpu-profiler.h" |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 37 | #include "debug.h" |
machenbach@chromium.org | ed29eb2 | 2013-10-31 13:30:00 +0000 | [diff] [blame] | 38 | #include "isolate-inl.h" |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 39 | #include "runtime.h" |
| 40 | |
| 41 | namespace v8 { |
| 42 | namespace internal { |
| 43 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 44 | MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size) |
| 45 | : Assembler(arg_isolate, buffer, size), |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 46 | generating_stub_(false), |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 47 | has_frame_(false) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 48 | if (isolate() != NULL) { |
| 49 | code_object_ = Handle<Object>(isolate()->heap()->undefined_value(), |
| 50 | isolate()); |
| 51 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 52 | } |
| 53 | |
| 54 | |
machenbach@chromium.org | 935a779 | 2013-11-12 09:05:18 +0000 | [diff] [blame] | 55 | void MacroAssembler::Load(Register dst, |
| 56 | const MemOperand& src, |
| 57 | Representation r) { |
| 58 | ASSERT(!r.IsDouble()); |
| 59 | if (r.IsInteger8()) { |
| 60 | lb(dst, src); |
| 61 | } else if (r.IsUInteger8()) { |
| 62 | lbu(dst, src); |
| 63 | } else if (r.IsInteger16()) { |
| 64 | lh(dst, src); |
| 65 | } else if (r.IsUInteger16()) { |
| 66 | lhu(dst, src); |
| 67 | } else { |
| 68 | lw(dst, src); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | |
| 73 | void MacroAssembler::Store(Register src, |
| 74 | const MemOperand& dst, |
| 75 | Representation r) { |
| 76 | ASSERT(!r.IsDouble()); |
| 77 | if (r.IsInteger8() || r.IsUInteger8()) { |
| 78 | sb(src, dst); |
| 79 | } else if (r.IsInteger16() || r.IsUInteger16()) { |
| 80 | sh(src, dst); |
| 81 | } else { |
| 82 | sw(src, dst); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 87 | void MacroAssembler::LoadRoot(Register destination, |
| 88 | Heap::RootListIndex index) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 89 | lw(destination, MemOperand(s6, index << kPointerSizeLog2)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 90 | } |
| 91 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 92 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 93 | void MacroAssembler::LoadRoot(Register destination, |
| 94 | Heap::RootListIndex index, |
| 95 | Condition cond, |
| 96 | Register src1, const Operand& src2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 97 | Branch(2, NegateCondition(cond), src1, src2); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 98 | lw(destination, MemOperand(s6, index << kPointerSizeLog2)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 102 | void MacroAssembler::StoreRoot(Register source, |
| 103 | Heap::RootListIndex index) { |
| 104 | sw(source, MemOperand(s6, index << kPointerSizeLog2)); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | void MacroAssembler::StoreRoot(Register source, |
| 109 | Heap::RootListIndex index, |
| 110 | Condition cond, |
| 111 | Register src1, const Operand& src2) { |
| 112 | Branch(2, NegateCondition(cond), src1, src2); |
| 113 | sw(source, MemOperand(s6, index << kPointerSizeLog2)); |
| 114 | } |
| 115 | |
| 116 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 117 | // Push and pop all registers that can hold pointers. |
| 118 | void MacroAssembler::PushSafepointRegisters() { |
| 119 | // Safepoints expect a block of kNumSafepointRegisters values on the |
| 120 | // stack, so adjust the stack for unsaved registers. |
| 121 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| 122 | ASSERT(num_unsaved >= 0); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 123 | if (num_unsaved > 0) { |
| 124 | Subu(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 125 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 126 | MultiPush(kSafepointSavedRegisters); |
| 127 | } |
| 128 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 129 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 130 | void MacroAssembler::PopSafepointRegisters() { |
| 131 | const int num_unsaved = kNumSafepointRegisters - kNumSafepointSavedRegisters; |
| 132 | MultiPop(kSafepointSavedRegisters); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 133 | if (num_unsaved > 0) { |
| 134 | Addu(sp, sp, Operand(num_unsaved * kPointerSize)); |
| 135 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 136 | } |
| 137 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 138 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 139 | void MacroAssembler::PushSafepointRegistersAndDoubles() { |
| 140 | PushSafepointRegisters(); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 141 | Subu(sp, sp, Operand(FPURegister::NumAllocatableRegisters() * kDoubleSize)); |
| 142 | for (int i = 0; i < FPURegister::NumAllocatableRegisters(); i+=2) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 143 | FPURegister reg = FPURegister::FromAllocationIndex(i); |
| 144 | sdc1(reg, MemOperand(sp, i * kDoubleSize)); |
| 145 | } |
| 146 | } |
| 147 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 148 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 149 | void MacroAssembler::PopSafepointRegistersAndDoubles() { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 150 | for (int i = 0; i < FPURegister::NumAllocatableRegisters(); i+=2) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 151 | FPURegister reg = FPURegister::FromAllocationIndex(i); |
| 152 | ldc1(reg, MemOperand(sp, i * kDoubleSize)); |
| 153 | } |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 154 | Addu(sp, sp, Operand(FPURegister::NumAllocatableRegisters() * kDoubleSize)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 155 | PopSafepointRegisters(); |
| 156 | } |
| 157 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 158 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 159 | void MacroAssembler::StoreToSafepointRegistersAndDoublesSlot(Register src, |
| 160 | Register dst) { |
| 161 | sw(src, SafepointRegistersAndDoublesSlot(dst)); |
| 162 | } |
| 163 | |
| 164 | |
| 165 | void MacroAssembler::StoreToSafepointRegisterSlot(Register src, Register dst) { |
| 166 | sw(src, SafepointRegisterSlot(dst)); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | void MacroAssembler::LoadFromSafepointRegisterSlot(Register dst, Register src) { |
| 171 | lw(dst, SafepointRegisterSlot(src)); |
| 172 | } |
| 173 | |
| 174 | |
| 175 | int MacroAssembler::SafepointRegisterStackIndex(int reg_code) { |
| 176 | // The registers are pushed starting with the highest encoding, |
| 177 | // which means that lowest encodings are closest to the stack pointer. |
| 178 | return kSafepointRegisterStackIndexMap[reg_code]; |
| 179 | } |
| 180 | |
| 181 | |
| 182 | MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) { |
| 183 | return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 188 | UNIMPLEMENTED_MIPS(); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 189 | // General purpose registers are pushed last on the stack. |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 190 | int doubles_size = FPURegister::NumAllocatableRegisters() * kDoubleSize; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 191 | int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize; |
| 192 | return MemOperand(sp, doubles_size + register_offset); |
| 193 | } |
| 194 | |
| 195 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 196 | void MacroAssembler::InNewSpace(Register object, |
| 197 | Register scratch, |
| 198 | Condition cc, |
| 199 | Label* branch) { |
| 200 | ASSERT(cc == eq || cc == ne); |
| 201 | And(scratch, object, Operand(ExternalReference::new_space_mask(isolate()))); |
| 202 | Branch(branch, cc, scratch, |
| 203 | Operand(ExternalReference::new_space_start(isolate()))); |
| 204 | } |
| 205 | |
| 206 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 207 | void MacroAssembler::RecordWriteField( |
| 208 | Register object, |
| 209 | int offset, |
| 210 | Register value, |
| 211 | Register dst, |
| 212 | RAStatus ra_status, |
| 213 | SaveFPRegsMode save_fp, |
| 214 | RememberedSetAction remembered_set_action, |
| 215 | SmiCheck smi_check) { |
| 216 | ASSERT(!AreAliased(value, dst, t8, object)); |
| 217 | // First, check if a write barrier is even needed. The tests below |
| 218 | // catch stores of Smis. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 219 | Label done; |
| 220 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 221 | // Skip barrier if writing a smi. |
| 222 | if (smi_check == INLINE_SMI_CHECK) { |
| 223 | JumpIfSmi(value, &done); |
| 224 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 225 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 226 | // Although the object register is tagged, the offset is relative to the start |
| 227 | // of the object, so so offset must be a multiple of kPointerSize. |
| 228 | ASSERT(IsAligned(offset, kPointerSize)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 229 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 230 | Addu(dst, object, Operand(offset - kHeapObjectTag)); |
| 231 | if (emit_debug_code()) { |
| 232 | Label ok; |
| 233 | And(t8, dst, Operand((1 << kPointerSizeLog2) - 1)); |
| 234 | Branch(&ok, eq, t8, Operand(zero_reg)); |
| 235 | stop("Unaligned cell in write barrier"); |
| 236 | bind(&ok); |
| 237 | } |
| 238 | |
| 239 | RecordWrite(object, |
| 240 | dst, |
| 241 | value, |
| 242 | ra_status, |
| 243 | save_fp, |
| 244 | remembered_set_action, |
| 245 | OMIT_SMI_CHECK); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 246 | |
| 247 | bind(&done); |
| 248 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 249 | // Clobber clobbered input registers when running with the debug-code flag |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 250 | // turned on to provoke errors. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 251 | if (emit_debug_code()) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 252 | li(value, Operand(BitCast<int32_t>(kZapValue + 4))); |
| 253 | li(dst, Operand(BitCast<int32_t>(kZapValue + 8))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 254 | } |
| 255 | } |
| 256 | |
| 257 | |
| 258 | // Will clobber 4 registers: object, address, scratch, ip. The |
| 259 | // register 'object' contains a heap object pointer. The heap object |
| 260 | // tag is shifted away. |
| 261 | void MacroAssembler::RecordWrite(Register object, |
| 262 | Register address, |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 263 | Register value, |
| 264 | RAStatus ra_status, |
| 265 | SaveFPRegsMode fp_mode, |
| 266 | RememberedSetAction remembered_set_action, |
| 267 | SmiCheck smi_check) { |
| 268 | ASSERT(!AreAliased(object, address, value, t8)); |
| 269 | ASSERT(!AreAliased(object, address, value, t9)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 270 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 271 | if (emit_debug_code()) { |
| 272 | lw(at, MemOperand(address)); |
| 273 | Assert( |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 274 | eq, kWrongAddressOrValuePassedToRecordWrite, at, Operand(value)); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 275 | } |
| 276 | |
machenbach@chromium.org | f984189 | 2013-11-25 12:01:13 +0000 | [diff] [blame] | 277 | // Count number of write barriers in generated code. |
| 278 | isolate()->counters()->write_barriers_static()->Increment(); |
| 279 | // TODO(mstarzinger): Dynamic counter missing. |
| 280 | |
| 281 | // First, check if a write barrier is even needed. The tests below |
| 282 | // catch stores of smis and stores into the young generation. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 283 | Label done; |
| 284 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 285 | if (smi_check == INLINE_SMI_CHECK) { |
| 286 | ASSERT_EQ(0, kSmiTag); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 287 | JumpIfSmi(value, &done); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | CheckPageFlag(value, |
| 291 | value, // Used as scratch. |
| 292 | MemoryChunk::kPointersToHereAreInterestingMask, |
| 293 | eq, |
| 294 | &done); |
| 295 | CheckPageFlag(object, |
| 296 | value, // Used as scratch. |
| 297 | MemoryChunk::kPointersFromHereAreInterestingMask, |
| 298 | eq, |
| 299 | &done); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 300 | |
| 301 | // Record the actual write. |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 302 | if (ra_status == kRAHasNotBeenSaved) { |
| 303 | push(ra); |
| 304 | } |
| 305 | RecordWriteStub stub(object, value, address, remembered_set_action, fp_mode); |
| 306 | CallStub(&stub); |
| 307 | if (ra_status == kRAHasNotBeenSaved) { |
| 308 | pop(ra); |
| 309 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 310 | |
| 311 | bind(&done); |
| 312 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 313 | // Clobber clobbered registers when running with the debug-code flag |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 314 | // turned on to provoke errors. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 315 | if (emit_debug_code()) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 316 | li(address, Operand(BitCast<int32_t>(kZapValue + 12))); |
| 317 | li(value, Operand(BitCast<int32_t>(kZapValue + 16))); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | |
| 322 | void MacroAssembler::RememberedSetHelper(Register object, // For debug tests. |
| 323 | Register address, |
| 324 | Register scratch, |
| 325 | SaveFPRegsMode fp_mode, |
| 326 | RememberedSetFinalAction and_then) { |
| 327 | Label done; |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 328 | if (emit_debug_code()) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 329 | Label ok; |
| 330 | JumpIfNotInNewSpace(object, scratch, &ok); |
| 331 | stop("Remembered set pointer is in new space"); |
| 332 | bind(&ok); |
| 333 | } |
| 334 | // Load store buffer top. |
| 335 | ExternalReference store_buffer = |
| 336 | ExternalReference::store_buffer_top(isolate()); |
| 337 | li(t8, Operand(store_buffer)); |
| 338 | lw(scratch, MemOperand(t8)); |
| 339 | // Store pointer to buffer and increment buffer top. |
| 340 | sw(address, MemOperand(scratch)); |
| 341 | Addu(scratch, scratch, kPointerSize); |
| 342 | // Write back new top of buffer. |
| 343 | sw(scratch, MemOperand(t8)); |
| 344 | // Call stub on end of buffer. |
| 345 | // Check for end of buffer. |
| 346 | And(t8, scratch, Operand(StoreBuffer::kStoreBufferOverflowBit)); |
| 347 | if (and_then == kFallThroughAtEnd) { |
| 348 | Branch(&done, eq, t8, Operand(zero_reg)); |
| 349 | } else { |
| 350 | ASSERT(and_then == kReturnAtEnd); |
| 351 | Ret(eq, t8, Operand(zero_reg)); |
| 352 | } |
| 353 | push(ra); |
| 354 | StoreBufferOverflowStub store_buffer_overflow = |
| 355 | StoreBufferOverflowStub(fp_mode); |
| 356 | CallStub(&store_buffer_overflow); |
| 357 | pop(ra); |
| 358 | bind(&done); |
| 359 | if (and_then == kReturnAtEnd) { |
| 360 | Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 361 | } |
| 362 | } |
| 363 | |
| 364 | |
| 365 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 366 | // Allocation support. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 367 | |
| 368 | |
| 369 | void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, |
| 370 | Register scratch, |
| 371 | Label* miss) { |
| 372 | Label same_contexts; |
| 373 | |
| 374 | ASSERT(!holder_reg.is(scratch)); |
| 375 | ASSERT(!holder_reg.is(at)); |
| 376 | ASSERT(!scratch.is(at)); |
| 377 | |
| 378 | // Load current lexical context from the stack frame. |
| 379 | lw(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 380 | // In debug mode, make sure the lexical context is set. |
| 381 | #ifdef DEBUG |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 382 | Check(ne, kWeShouldNotHaveAnEmptyLexicalContext, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 383 | scratch, Operand(zero_reg)); |
| 384 | #endif |
| 385 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 386 | // Load the native context of the current context. |
| 387 | int offset = |
| 388 | Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 389 | lw(scratch, FieldMemOperand(scratch, offset)); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 390 | lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 391 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 392 | // Check the context is a native context. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 393 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 394 | push(holder_reg); // Temporarily save holder on the stack. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 395 | // Read the first word and compare to the native_context_map. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 396 | lw(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 397 | LoadRoot(at, Heap::kNativeContextMapRootIndex); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 398 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 399 | holder_reg, Operand(at)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 400 | pop(holder_reg); // Restore holder. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 401 | } |
| 402 | |
| 403 | // Check if both contexts are the same. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 404 | lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 405 | Branch(&same_contexts, eq, scratch, Operand(at)); |
| 406 | |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 407 | // Check the context is a native context. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 408 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 409 | push(holder_reg); // Temporarily save holder on the stack. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 410 | mov(holder_reg, at); // Move at to its holding place. |
| 411 | LoadRoot(at, Heap::kNullValueRootIndex); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 412 | Check(ne, kJSGlobalProxyContextShouldNotBeNull, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 413 | holder_reg, Operand(at)); |
| 414 | |
| 415 | lw(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 416 | LoadRoot(at, Heap::kNativeContextMapRootIndex); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 417 | Check(eq, kJSGlobalObjectNativeContextShouldBeANativeContext, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 418 | holder_reg, Operand(at)); |
| 419 | // Restore at is not needed. at is reloaded below. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 420 | pop(holder_reg); // Restore holder. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 421 | // Restore at to holder's context. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 422 | lw(at, FieldMemOperand(holder_reg, JSGlobalProxy::kNativeContextOffset)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | // Check that the security token in the calling global object is |
| 426 | // compatible with the security token in the receiving global |
| 427 | // object. |
| 428 | int token_offset = Context::kHeaderSize + |
| 429 | Context::SECURITY_TOKEN_INDEX * kPointerSize; |
| 430 | |
| 431 | lw(scratch, FieldMemOperand(scratch, token_offset)); |
| 432 | lw(at, FieldMemOperand(at, token_offset)); |
| 433 | Branch(miss, ne, scratch, Operand(at)); |
| 434 | |
| 435 | bind(&same_contexts); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 439 | void MacroAssembler::GetNumberHash(Register reg0, Register scratch) { |
| 440 | // First of all we assign the hash seed to scratch. |
| 441 | LoadRoot(scratch, Heap::kHashSeedRootIndex); |
| 442 | SmiUntag(scratch); |
| 443 | |
| 444 | // Xor original key with a seed. |
| 445 | xor_(reg0, reg0, scratch); |
| 446 | |
| 447 | // Compute the hash code from the untagged key. This must be kept in sync |
| 448 | // with ComputeIntegerHash in utils.h. |
| 449 | // |
| 450 | // hash = ~hash + (hash << 15); |
| 451 | nor(scratch, reg0, zero_reg); |
| 452 | sll(at, reg0, 15); |
| 453 | addu(reg0, scratch, at); |
| 454 | |
| 455 | // hash = hash ^ (hash >> 12); |
| 456 | srl(at, reg0, 12); |
| 457 | xor_(reg0, reg0, at); |
| 458 | |
| 459 | // hash = hash + (hash << 2); |
| 460 | sll(at, reg0, 2); |
| 461 | addu(reg0, reg0, at); |
| 462 | |
| 463 | // hash = hash ^ (hash >> 4); |
| 464 | srl(at, reg0, 4); |
| 465 | xor_(reg0, reg0, at); |
| 466 | |
| 467 | // hash = hash * 2057; |
ulan@chromium.org | 2efb900 | 2012-01-19 15:36:35 +0000 | [diff] [blame] | 468 | sll(scratch, reg0, 11); |
| 469 | sll(at, reg0, 3); |
| 470 | addu(reg0, reg0, at); |
| 471 | addu(reg0, reg0, scratch); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 472 | |
| 473 | // hash = hash ^ (hash >> 16); |
| 474 | srl(at, reg0, 16); |
| 475 | xor_(reg0, reg0, at); |
| 476 | } |
| 477 | |
| 478 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 479 | void MacroAssembler::LoadFromNumberDictionary(Label* miss, |
| 480 | Register elements, |
| 481 | Register key, |
| 482 | Register result, |
| 483 | Register reg0, |
| 484 | Register reg1, |
| 485 | Register reg2) { |
| 486 | // Register use: |
| 487 | // |
| 488 | // elements - holds the slow-case elements of the receiver on entry. |
| 489 | // Unchanged unless 'result' is the same register. |
| 490 | // |
| 491 | // key - holds the smi key on entry. |
| 492 | // Unchanged unless 'result' is the same register. |
| 493 | // |
| 494 | // |
| 495 | // result - holds the result on exit if the load succeeded. |
| 496 | // Allowed to be the same as 'key' or 'result'. |
| 497 | // Unchanged on bailout so 'key' or 'result' can be used |
| 498 | // in further computation. |
| 499 | // |
| 500 | // Scratch registers: |
| 501 | // |
| 502 | // reg0 - holds the untagged key on entry and holds the hash once computed. |
| 503 | // |
| 504 | // reg1 - Used to hold the capacity mask of the dictionary. |
| 505 | // |
| 506 | // reg2 - Used for the index into the dictionary. |
| 507 | // at - Temporary (avoid MacroAssembler instructions also using 'at'). |
| 508 | Label done; |
| 509 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 510 | GetNumberHash(reg0, reg1); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 511 | |
| 512 | // Compute the capacity mask. |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 513 | lw(reg1, FieldMemOperand(elements, SeededNumberDictionary::kCapacityOffset)); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 514 | sra(reg1, reg1, kSmiTagSize); |
| 515 | Subu(reg1, reg1, Operand(1)); |
| 516 | |
| 517 | // Generate an unrolled loop that performs a few probes before giving up. |
machenbach@chromium.org | ea46888 | 2013-11-18 08:53:19 +0000 | [diff] [blame] | 518 | for (int i = 0; i < kNumberDictionaryProbes; i++) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 519 | // Use reg2 for index calculations and keep the hash intact in reg0. |
| 520 | mov(reg2, reg0); |
| 521 | // Compute the masked index: (hash + i + i * i) & mask. |
| 522 | if (i > 0) { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 523 | Addu(reg2, reg2, Operand(SeededNumberDictionary::GetProbeOffset(i))); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 524 | } |
| 525 | and_(reg2, reg2, reg1); |
| 526 | |
| 527 | // Scale the index by multiplying by the element size. |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 528 | ASSERT(SeededNumberDictionary::kEntrySize == 3); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 529 | sll(at, reg2, 1); // 2x. |
| 530 | addu(reg2, reg2, at); // reg2 = reg2 * 3. |
| 531 | |
| 532 | // Check if the key is identical to the name. |
| 533 | sll(at, reg2, kPointerSizeLog2); |
| 534 | addu(reg2, elements, at); |
| 535 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 536 | lw(at, FieldMemOperand(reg2, SeededNumberDictionary::kElementsStartOffset)); |
machenbach@chromium.org | ea46888 | 2013-11-18 08:53:19 +0000 | [diff] [blame] | 537 | if (i != kNumberDictionaryProbes - 1) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 538 | Branch(&done, eq, key, Operand(at)); |
| 539 | } else { |
| 540 | Branch(miss, ne, key, Operand(at)); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | bind(&done); |
| 545 | // Check that the value is a normal property. |
| 546 | // reg2: elements + (index * kPointerSize). |
| 547 | const int kDetailsOffset = |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 548 | SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 549 | lw(reg1, FieldMemOperand(reg2, kDetailsOffset)); |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 550 | And(at, reg1, Operand(Smi::FromInt(PropertyDetails::TypeField::kMask))); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 551 | Branch(miss, ne, at, Operand(zero_reg)); |
| 552 | |
| 553 | // Get the value at the masked, scaled index and return. |
| 554 | const int kValueOffset = |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 555 | SeededNumberDictionary::kElementsStartOffset + kPointerSize; |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 556 | lw(result, FieldMemOperand(reg2, kValueOffset)); |
| 557 | } |
| 558 | |
| 559 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 560 | // --------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 561 | // Instruction macros. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 562 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 563 | void MacroAssembler::Addu(Register rd, Register rs, const Operand& rt) { |
| 564 | if (rt.is_reg()) { |
| 565 | addu(rd, rs, rt.rm()); |
| 566 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 567 | if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 568 | addiu(rd, rs, rt.imm32_); |
| 569 | } else { |
| 570 | // li handles the relocation. |
| 571 | ASSERT(!rs.is(at)); |
| 572 | li(at, rt); |
| 573 | addu(rd, rs, at); |
| 574 | } |
| 575 | } |
| 576 | } |
| 577 | |
| 578 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 579 | void MacroAssembler::Subu(Register rd, Register rs, const Operand& rt) { |
| 580 | if (rt.is_reg()) { |
| 581 | subu(rd, rs, rt.rm()); |
| 582 | } else { |
| 583 | if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
| 584 | addiu(rd, rs, -rt.imm32_); // No subiu instr, use addiu(x, y, -imm). |
| 585 | } else { |
| 586 | // li handles the relocation. |
| 587 | ASSERT(!rs.is(at)); |
| 588 | li(at, rt); |
| 589 | subu(rd, rs, at); |
| 590 | } |
| 591 | } |
| 592 | } |
| 593 | |
| 594 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 595 | void MacroAssembler::Mul(Register rd, Register rs, const Operand& rt) { |
| 596 | if (rt.is_reg()) { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 597 | if (kArchVariant == kLoongson) { |
| 598 | mult(rs, rt.rm()); |
| 599 | mflo(rd); |
| 600 | } else { |
| 601 | mul(rd, rs, rt.rm()); |
| 602 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 603 | } else { |
| 604 | // li handles the relocation. |
| 605 | ASSERT(!rs.is(at)); |
| 606 | li(at, rt); |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 607 | if (kArchVariant == kLoongson) { |
| 608 | mult(rs, at); |
| 609 | mflo(rd); |
| 610 | } else { |
| 611 | mul(rd, rs, at); |
| 612 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 613 | } |
| 614 | } |
| 615 | |
| 616 | |
| 617 | void MacroAssembler::Mult(Register rs, const Operand& rt) { |
| 618 | if (rt.is_reg()) { |
| 619 | mult(rs, rt.rm()); |
| 620 | } else { |
| 621 | // li handles the relocation. |
| 622 | ASSERT(!rs.is(at)); |
| 623 | li(at, rt); |
| 624 | mult(rs, at); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | |
| 629 | void MacroAssembler::Multu(Register rs, const Operand& rt) { |
| 630 | if (rt.is_reg()) { |
| 631 | multu(rs, rt.rm()); |
| 632 | } else { |
| 633 | // li handles the relocation. |
| 634 | ASSERT(!rs.is(at)); |
| 635 | li(at, rt); |
| 636 | multu(rs, at); |
| 637 | } |
| 638 | } |
| 639 | |
| 640 | |
| 641 | void MacroAssembler::Div(Register rs, const Operand& rt) { |
| 642 | if (rt.is_reg()) { |
| 643 | div(rs, rt.rm()); |
| 644 | } else { |
| 645 | // li handles the relocation. |
| 646 | ASSERT(!rs.is(at)); |
| 647 | li(at, rt); |
| 648 | div(rs, at); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | |
| 653 | void MacroAssembler::Divu(Register rs, const Operand& rt) { |
| 654 | if (rt.is_reg()) { |
| 655 | divu(rs, rt.rm()); |
| 656 | } else { |
| 657 | // li handles the relocation. |
| 658 | ASSERT(!rs.is(at)); |
| 659 | li(at, rt); |
| 660 | divu(rs, at); |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | |
| 665 | void MacroAssembler::And(Register rd, Register rs, const Operand& rt) { |
| 666 | if (rt.is_reg()) { |
| 667 | and_(rd, rs, rt.rm()); |
| 668 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 669 | if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 670 | andi(rd, rs, rt.imm32_); |
| 671 | } else { |
| 672 | // li handles the relocation. |
| 673 | ASSERT(!rs.is(at)); |
| 674 | li(at, rt); |
| 675 | and_(rd, rs, at); |
| 676 | } |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | |
| 681 | void MacroAssembler::Or(Register rd, Register rs, const Operand& rt) { |
| 682 | if (rt.is_reg()) { |
| 683 | or_(rd, rs, rt.rm()); |
| 684 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 685 | if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 686 | ori(rd, rs, rt.imm32_); |
| 687 | } else { |
| 688 | // li handles the relocation. |
| 689 | ASSERT(!rs.is(at)); |
| 690 | li(at, rt); |
| 691 | or_(rd, rs, at); |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | |
| 697 | void MacroAssembler::Xor(Register rd, Register rs, const Operand& rt) { |
| 698 | if (rt.is_reg()) { |
| 699 | xor_(rd, rs, rt.rm()); |
| 700 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 701 | if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 702 | xori(rd, rs, rt.imm32_); |
| 703 | } else { |
| 704 | // li handles the relocation. |
| 705 | ASSERT(!rs.is(at)); |
| 706 | li(at, rt); |
| 707 | xor_(rd, rs, at); |
| 708 | } |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | |
| 713 | void MacroAssembler::Nor(Register rd, Register rs, const Operand& rt) { |
| 714 | if (rt.is_reg()) { |
| 715 | nor(rd, rs, rt.rm()); |
| 716 | } else { |
| 717 | // li handles the relocation. |
| 718 | ASSERT(!rs.is(at)); |
| 719 | li(at, rt); |
| 720 | nor(rd, rs, at); |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 725 | void MacroAssembler::Neg(Register rs, const Operand& rt) { |
| 726 | ASSERT(rt.is_reg()); |
| 727 | ASSERT(!at.is(rs)); |
| 728 | ASSERT(!at.is(rt.rm())); |
| 729 | li(at, -1); |
| 730 | xor_(rs, rt.rm(), at); |
| 731 | } |
| 732 | |
| 733 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 734 | void MacroAssembler::Slt(Register rd, Register rs, const Operand& rt) { |
| 735 | if (rt.is_reg()) { |
| 736 | slt(rd, rs, rt.rm()); |
| 737 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 738 | if (is_int16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 739 | slti(rd, rs, rt.imm32_); |
| 740 | } else { |
| 741 | // li handles the relocation. |
| 742 | ASSERT(!rs.is(at)); |
| 743 | li(at, rt); |
| 744 | slt(rd, rs, at); |
| 745 | } |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | |
| 750 | void MacroAssembler::Sltu(Register rd, Register rs, const Operand& rt) { |
| 751 | if (rt.is_reg()) { |
| 752 | sltu(rd, rs, rt.rm()); |
| 753 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 754 | if (is_uint16(rt.imm32_) && !MustUseReg(rt.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 755 | sltiu(rd, rs, rt.imm32_); |
| 756 | } else { |
| 757 | // li handles the relocation. |
| 758 | ASSERT(!rs.is(at)); |
| 759 | li(at, rt); |
| 760 | sltu(rd, rs, at); |
| 761 | } |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 766 | void MacroAssembler::Ror(Register rd, Register rs, const Operand& rt) { |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 767 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 768 | if (rt.is_reg()) { |
| 769 | rotrv(rd, rs, rt.rm()); |
| 770 | } else { |
| 771 | rotr(rd, rs, rt.imm32_); |
| 772 | } |
| 773 | } else { |
| 774 | if (rt.is_reg()) { |
| 775 | subu(at, zero_reg, rt.rm()); |
| 776 | sllv(at, rs, at); |
| 777 | srlv(rd, rs, rt.rm()); |
| 778 | or_(rd, rd, at); |
| 779 | } else { |
| 780 | if (rt.imm32_ == 0) { |
| 781 | srl(rd, rs, 0); |
| 782 | } else { |
| 783 | srl(at, rs, rt.imm32_); |
| 784 | sll(rd, rs, (0x20 - rt.imm32_) & 0x1f); |
| 785 | or_(rd, rd, at); |
| 786 | } |
| 787 | } |
| 788 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 789 | } |
| 790 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 791 | |
machenbach@chromium.org | afbdadc | 2013-12-09 16:12:18 +0000 | [diff] [blame] | 792 | void MacroAssembler::Pref(int32_t hint, const MemOperand& rs) { |
| 793 | if (kArchVariant == kLoongson) { |
| 794 | lw(zero_reg, rs); |
| 795 | } else { |
| 796 | pref(hint, rs); |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 801 | //------------Pseudo-instructions------------- |
| 802 | |
machenbach@chromium.org | afbdadc | 2013-12-09 16:12:18 +0000 | [diff] [blame] | 803 | void MacroAssembler::Ulw(Register rd, const MemOperand& rs) { |
| 804 | lwr(rd, rs); |
| 805 | lwl(rd, MemOperand(rs.rm(), rs.offset() + 3)); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | void MacroAssembler::Usw(Register rd, const MemOperand& rs) { |
| 810 | swr(rd, rs); |
| 811 | swl(rd, MemOperand(rs.rm(), rs.offset() + 3)); |
| 812 | } |
| 813 | |
| 814 | |
verwaest@chromium.org | 057bd50 | 2013-11-06 12:03:29 +0000 | [diff] [blame] | 815 | void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) { |
| 816 | AllowDeferredHandleDereference smi_check; |
| 817 | if (value->IsSmi()) { |
| 818 | li(dst, Operand(value), mode); |
| 819 | } else { |
| 820 | ASSERT(value->IsHeapObject()); |
| 821 | if (isolate()->heap()->InNewSpace(*value)) { |
| 822 | Handle<Cell> cell = isolate()->factory()->NewCell(value); |
| 823 | li(dst, Operand(cell)); |
| 824 | lw(dst, FieldMemOperand(dst, Cell::kValueOffset)); |
| 825 | } else { |
| 826 | li(dst, Operand(value)); |
| 827 | } |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 832 | void MacroAssembler::li(Register rd, Operand j, LiFlags mode) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 833 | ASSERT(!j.is_reg()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 834 | BlockTrampolinePoolScope block_trampoline_pool(this); |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 835 | if (!MustUseReg(j.rmode_) && mode == OPTIMIZE_SIZE) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 836 | // Normal load of an immediate value which does not need Relocation Info. |
| 837 | if (is_int16(j.imm32_)) { |
| 838 | addiu(rd, zero_reg, j.imm32_); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 839 | } else if (!(j.imm32_ & kHiMask)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 840 | ori(rd, zero_reg, j.imm32_); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 841 | } else if (!(j.imm32_ & kImm16Mask)) { |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 842 | lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 843 | } else { |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 844 | lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 845 | ori(rd, rd, (j.imm32_ & kImm16Mask)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 846 | } |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 847 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 848 | if (MustUseReg(j.rmode_)) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 849 | RecordRelocInfo(j.rmode_, j.imm32_); |
| 850 | } |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 851 | // We always need the same number of instructions as we may need to patch |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 852 | // this code to load another value which may need 2 instructions to load. |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 853 | lui(rd, (j.imm32_ >> kLuiShift) & kImm16Mask); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 854 | ori(rd, rd, (j.imm32_ & kImm16Mask)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 855 | } |
| 856 | } |
| 857 | |
| 858 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 859 | void MacroAssembler::MultiPush(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 860 | int16_t num_to_push = NumberOfBitsSet(regs); |
| 861 | int16_t stack_offset = num_to_push * kPointerSize; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 862 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 863 | Subu(sp, sp, Operand(stack_offset)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 864 | for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 865 | if ((regs & (1 << i)) != 0) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 866 | stack_offset -= kPointerSize; |
| 867 | sw(ToRegister(i), MemOperand(sp, stack_offset)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 868 | } |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | |
| 873 | void MacroAssembler::MultiPushReversed(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 874 | int16_t num_to_push = NumberOfBitsSet(regs); |
| 875 | int16_t stack_offset = num_to_push * kPointerSize; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 876 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 877 | Subu(sp, sp, Operand(stack_offset)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 878 | for (int16_t i = 0; i < kNumRegisters; i++) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 879 | if ((regs & (1 << i)) != 0) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 880 | stack_offset -= kPointerSize; |
| 881 | sw(ToRegister(i), MemOperand(sp, stack_offset)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 882 | } |
| 883 | } |
| 884 | } |
| 885 | |
| 886 | |
| 887 | void MacroAssembler::MultiPop(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 888 | int16_t stack_offset = 0; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 889 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 890 | for (int16_t i = 0; i < kNumRegisters; i++) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 891 | if ((regs & (1 << i)) != 0) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 892 | lw(ToRegister(i), MemOperand(sp, stack_offset)); |
| 893 | stack_offset += kPointerSize; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 894 | } |
| 895 | } |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 896 | addiu(sp, sp, stack_offset); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 897 | } |
| 898 | |
| 899 | |
| 900 | void MacroAssembler::MultiPopReversed(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 901 | int16_t stack_offset = 0; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 902 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 903 | for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 904 | if ((regs & (1 << i)) != 0) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 905 | lw(ToRegister(i), MemOperand(sp, stack_offset)); |
| 906 | stack_offset += kPointerSize; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 907 | } |
| 908 | } |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 909 | addiu(sp, sp, stack_offset); |
| 910 | } |
| 911 | |
| 912 | |
| 913 | void MacroAssembler::MultiPushFPU(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 914 | int16_t num_to_push = NumberOfBitsSet(regs); |
| 915 | int16_t stack_offset = num_to_push * kDoubleSize; |
| 916 | |
| 917 | Subu(sp, sp, Operand(stack_offset)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 918 | for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 919 | if ((regs & (1 << i)) != 0) { |
| 920 | stack_offset -= kDoubleSize; |
| 921 | sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| 922 | } |
| 923 | } |
| 924 | } |
| 925 | |
| 926 | |
| 927 | void MacroAssembler::MultiPushReversedFPU(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 928 | int16_t num_to_push = NumberOfBitsSet(regs); |
| 929 | int16_t stack_offset = num_to_push * kDoubleSize; |
| 930 | |
| 931 | Subu(sp, sp, Operand(stack_offset)); |
| 932 | for (int16_t i = 0; i < kNumRegisters; i++) { |
| 933 | if ((regs & (1 << i)) != 0) { |
| 934 | stack_offset -= kDoubleSize; |
| 935 | sdc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| 936 | } |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | |
| 941 | void MacroAssembler::MultiPopFPU(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 942 | int16_t stack_offset = 0; |
| 943 | |
| 944 | for (int16_t i = 0; i < kNumRegisters; i++) { |
| 945 | if ((regs & (1 << i)) != 0) { |
| 946 | ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| 947 | stack_offset += kDoubleSize; |
| 948 | } |
| 949 | } |
| 950 | addiu(sp, sp, stack_offset); |
| 951 | } |
| 952 | |
| 953 | |
| 954 | void MacroAssembler::MultiPopReversedFPU(RegList regs) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 955 | int16_t stack_offset = 0; |
| 956 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 957 | for (int16_t i = kNumRegisters - 1; i >= 0; i--) { |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 958 | if ((regs & (1 << i)) != 0) { |
| 959 | ldc1(FPURegister::from_code(i), MemOperand(sp, stack_offset)); |
| 960 | stack_offset += kDoubleSize; |
| 961 | } |
| 962 | } |
| 963 | addiu(sp, sp, stack_offset); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 967 | void MacroAssembler::FlushICache(Register address, unsigned instructions) { |
| 968 | RegList saved_regs = kJSCallerSaved | ra.bit(); |
| 969 | MultiPush(saved_regs); |
| 970 | AllowExternalCallThatCantCauseGC scope(this); |
| 971 | |
| 972 | // Save to a0 in case address == t0. |
| 973 | Move(a0, address); |
| 974 | PrepareCallCFunction(2, t0); |
| 975 | |
| 976 | li(a1, instructions * kInstrSize); |
| 977 | CallCFunction(ExternalReference::flush_icache_function(isolate()), 2); |
| 978 | MultiPop(saved_regs); |
| 979 | } |
| 980 | |
| 981 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 982 | void MacroAssembler::Ext(Register rt, |
| 983 | Register rs, |
| 984 | uint16_t pos, |
| 985 | uint16_t size) { |
| 986 | ASSERT(pos < 32); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 987 | ASSERT(pos + size < 33); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 988 | |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 989 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 990 | ext_(rt, rs, pos, size); |
| 991 | } else { |
| 992 | // Move rs to rt and shift it left then right to get the |
| 993 | // desired bitfield on the right side and zeroes on the left. |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 994 | int shift_left = 32 - (pos + size); |
| 995 | sll(rt, rs, shift_left); // Acts as a move if shift_left == 0. |
| 996 | |
| 997 | int shift_right = 32 - size; |
| 998 | if (shift_right > 0) { |
| 999 | srl(rt, rt, shift_right); |
| 1000 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1001 | } |
| 1002 | } |
| 1003 | |
| 1004 | |
| 1005 | void MacroAssembler::Ins(Register rt, |
| 1006 | Register rs, |
| 1007 | uint16_t pos, |
| 1008 | uint16_t size) { |
| 1009 | ASSERT(pos < 32); |
erikcorry | 0ad885c | 2011-11-21 13:51:57 +0000 | [diff] [blame] | 1010 | ASSERT(pos + size <= 32); |
| 1011 | ASSERT(size != 0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1012 | |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 1013 | if (kArchVariant == kMips32r2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1014 | ins_(rt, rs, pos, size); |
| 1015 | } else { |
| 1016 | ASSERT(!rt.is(t8) && !rs.is(t8)); |
erikcorry | 0ad885c | 2011-11-21 13:51:57 +0000 | [diff] [blame] | 1017 | Subu(at, zero_reg, Operand(1)); |
| 1018 | srl(at, at, 32 - size); |
| 1019 | and_(t8, rs, at); |
| 1020 | sll(t8, t8, pos); |
| 1021 | sll(at, at, pos); |
| 1022 | nor(at, at, zero_reg); |
| 1023 | and_(at, rt, at); |
| 1024 | or_(rt, t8, at); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1025 | } |
| 1026 | } |
| 1027 | |
| 1028 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1029 | void MacroAssembler::Cvt_d_uw(FPURegister fd, |
| 1030 | FPURegister fs, |
| 1031 | FPURegister scratch) { |
| 1032 | // Move the data from fs to t8. |
| 1033 | mfc1(t8, fs); |
| 1034 | Cvt_d_uw(fd, t8, scratch); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1038 | void MacroAssembler::Cvt_d_uw(FPURegister fd, |
| 1039 | Register rs, |
| 1040 | FPURegister scratch) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1041 | // Convert rs to a FP value in fd (and fd + 1). |
| 1042 | // We do this by converting rs minus the MSB to avoid sign conversion, |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1043 | // then adding 2^31 to the result (if needed). |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1044 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1045 | ASSERT(!fd.is(scratch)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1046 | ASSERT(!rs.is(t9)); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1047 | ASSERT(!rs.is(at)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1048 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1049 | // Save rs's MSB to t9. |
| 1050 | Ext(t9, rs, 31, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1051 | // Remove rs's MSB. |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1052 | Ext(at, rs, 0, 31); |
| 1053 | // Move the result to fd. |
| 1054 | mtc1(at, fd); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1055 | |
| 1056 | // Convert fd to a real FP value. |
| 1057 | cvt_d_w(fd, fd); |
| 1058 | |
| 1059 | Label conversion_done; |
| 1060 | |
| 1061 | // If rs's MSB was 0, it's done. |
| 1062 | // Otherwise we need to add that to the FP register. |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1063 | Branch(&conversion_done, eq, t9, Operand(zero_reg)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1064 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1065 | // Load 2^31 into f20 as its float representation. |
| 1066 | li(at, 0x41E00000); |
| 1067 | mtc1(at, FPURegister::from_code(scratch.code() + 1)); |
| 1068 | mtc1(zero_reg, scratch); |
| 1069 | // Add it to fd. |
| 1070 | add_d(fd, fd, scratch); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1071 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1072 | bind(&conversion_done); |
| 1073 | } |
| 1074 | |
| 1075 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1076 | void MacroAssembler::Trunc_uw_d(FPURegister fd, |
| 1077 | FPURegister fs, |
| 1078 | FPURegister scratch) { |
| 1079 | Trunc_uw_d(fs, t8, scratch); |
| 1080 | mtc1(t8, fd); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1081 | } |
| 1082 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 1083 | |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 1084 | void MacroAssembler::Trunc_w_d(FPURegister fd, FPURegister fs) { |
| 1085 | if (kArchVariant == kLoongson && fd.is(fs)) { |
| 1086 | mfc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1087 | trunc_w_d(fd, fs); |
| 1088 | mtc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1089 | } else { |
| 1090 | trunc_w_d(fd, fs); |
| 1091 | } |
| 1092 | } |
| 1093 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 1094 | |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 1095 | void MacroAssembler::Round_w_d(FPURegister fd, FPURegister fs) { |
| 1096 | if (kArchVariant == kLoongson && fd.is(fs)) { |
| 1097 | mfc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1098 | round_w_d(fd, fs); |
| 1099 | mtc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1100 | } else { |
| 1101 | round_w_d(fd, fs); |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | |
| 1106 | void MacroAssembler::Floor_w_d(FPURegister fd, FPURegister fs) { |
| 1107 | if (kArchVariant == kLoongson && fd.is(fs)) { |
| 1108 | mfc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1109 | floor_w_d(fd, fs); |
| 1110 | mtc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1111 | } else { |
| 1112 | floor_w_d(fd, fs); |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | |
| 1117 | void MacroAssembler::Ceil_w_d(FPURegister fd, FPURegister fs) { |
| 1118 | if (kArchVariant == kLoongson && fd.is(fs)) { |
| 1119 | mfc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1120 | ceil_w_d(fd, fs); |
| 1121 | mtc1(t8, FPURegister::from_code(fs.code() + 1)); |
| 1122 | } else { |
| 1123 | ceil_w_d(fd, fs); |
| 1124 | } |
| 1125 | } |
| 1126 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1127 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1128 | void MacroAssembler::Trunc_uw_d(FPURegister fd, |
| 1129 | Register rs, |
| 1130 | FPURegister scratch) { |
| 1131 | ASSERT(!fd.is(scratch)); |
| 1132 | ASSERT(!rs.is(at)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1133 | |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1134 | // Load 2^31 into scratch as its float representation. |
| 1135 | li(at, 0x41E00000); |
| 1136 | mtc1(at, FPURegister::from_code(scratch.code() + 1)); |
| 1137 | mtc1(zero_reg, scratch); |
| 1138 | // Test if scratch > fd. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1139 | // If fd < 2^31 we can convert it normally. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1140 | Label simple_convert; |
| 1141 | BranchF(&simple_convert, NULL, lt, fd, scratch); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1142 | |
| 1143 | // First we subtract 2^31 from fd, then trunc it to rs |
| 1144 | // and add 2^31 to rs. |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1145 | sub_d(scratch, fd, scratch); |
| 1146 | trunc_w_d(scratch, scratch); |
| 1147 | mfc1(rs, scratch); |
| 1148 | Or(rs, rs, 1 << 31); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1149 | |
| 1150 | Label done; |
| 1151 | Branch(&done); |
| 1152 | // Simple conversion. |
| 1153 | bind(&simple_convert); |
ricow@chromium.org | 4668a2c | 2011-08-29 10:41:00 +0000 | [diff] [blame] | 1154 | trunc_w_d(scratch, fd); |
| 1155 | mfc1(rs, scratch); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1156 | |
| 1157 | bind(&done); |
| 1158 | } |
| 1159 | |
| 1160 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1161 | void MacroAssembler::BranchF(Label* target, |
| 1162 | Label* nan, |
| 1163 | Condition cc, |
| 1164 | FPURegister cmp1, |
| 1165 | FPURegister cmp2, |
| 1166 | BranchDelaySlot bd) { |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 1167 | BlockTrampolinePoolScope block_trampoline_pool(this); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1168 | if (cc == al) { |
| 1169 | Branch(bd, target); |
| 1170 | return; |
| 1171 | } |
| 1172 | |
| 1173 | ASSERT(nan || target); |
| 1174 | // Check for unordered (NaN) cases. |
| 1175 | if (nan) { |
| 1176 | c(UN, D, cmp1, cmp2); |
| 1177 | bc1t(nan); |
| 1178 | } |
| 1179 | |
| 1180 | if (target) { |
| 1181 | // Here NaN cases were either handled by this function or are assumed to |
| 1182 | // have been handled by the caller. |
| 1183 | // Unsigned conditions are treated as their signed counterpart. |
| 1184 | switch (cc) { |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1185 | case lt: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1186 | c(OLT, D, cmp1, cmp2); |
| 1187 | bc1t(target); |
| 1188 | break; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1189 | case gt: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1190 | c(ULE, D, cmp1, cmp2); |
| 1191 | bc1f(target); |
| 1192 | break; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1193 | case ge: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1194 | c(ULT, D, cmp1, cmp2); |
| 1195 | bc1f(target); |
| 1196 | break; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1197 | case le: |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1198 | c(OLE, D, cmp1, cmp2); |
| 1199 | bc1t(target); |
| 1200 | break; |
| 1201 | case eq: |
| 1202 | c(EQ, D, cmp1, cmp2); |
| 1203 | bc1t(target); |
| 1204 | break; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1205 | case ueq: |
| 1206 | c(UEQ, D, cmp1, cmp2); |
| 1207 | bc1t(target); |
| 1208 | break; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1209 | case ne: |
| 1210 | c(EQ, D, cmp1, cmp2); |
| 1211 | bc1f(target); |
| 1212 | break; |
ulan@chromium.org | 750145a | 2013-03-07 15:14:13 +0000 | [diff] [blame] | 1213 | case nue: |
| 1214 | c(UEQ, D, cmp1, cmp2); |
| 1215 | bc1f(target); |
| 1216 | break; |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1217 | default: |
| 1218 | CHECK(0); |
| 1219 | }; |
| 1220 | } |
| 1221 | |
| 1222 | if (bd == PROTECT) { |
| 1223 | nop(); |
| 1224 | } |
| 1225 | } |
| 1226 | |
| 1227 | |
| 1228 | void MacroAssembler::Move(FPURegister dst, double imm) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1229 | static const DoubleRepresentation minus_zero(-0.0); |
| 1230 | static const DoubleRepresentation zero(0.0); |
hpayer@chromium.org | ea9b8ba | 2013-12-20 19:22:39 +0000 | [diff] [blame] | 1231 | DoubleRepresentation value_rep(imm); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1232 | // Handle special values first. |
| 1233 | bool force_load = dst.is(kDoubleRegZero); |
hpayer@chromium.org | ea9b8ba | 2013-12-20 19:22:39 +0000 | [diff] [blame] | 1234 | if (value_rep == zero && !force_load) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1235 | mov_d(dst, kDoubleRegZero); |
hpayer@chromium.org | ea9b8ba | 2013-12-20 19:22:39 +0000 | [diff] [blame] | 1236 | } else if (value_rep == minus_zero && !force_load) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1237 | neg_d(dst, kDoubleRegZero); |
| 1238 | } else { |
| 1239 | uint32_t lo, hi; |
| 1240 | DoubleAsTwoUInt32(imm, &lo, &hi); |
| 1241 | // Move the low part of the double into the lower of the corresponding FPU |
| 1242 | // register of FPU register pair. |
| 1243 | if (lo != 0) { |
| 1244 | li(at, Operand(lo)); |
| 1245 | mtc1(at, dst); |
| 1246 | } else { |
| 1247 | mtc1(zero_reg, dst); |
| 1248 | } |
| 1249 | // Move the high part of the double into the higher of the corresponding FPU |
| 1250 | // register of FPU register pair. |
| 1251 | if (hi != 0) { |
| 1252 | li(at, Operand(hi)); |
| 1253 | mtc1(at, dst.high()); |
| 1254 | } else { |
| 1255 | mtc1(zero_reg, dst.high()); |
| 1256 | } |
| 1257 | } |
| 1258 | } |
| 1259 | |
| 1260 | |
mstarzinger@chromium.org | 3233d2f | 2012-03-14 11:16:03 +0000 | [diff] [blame] | 1261 | void MacroAssembler::Movz(Register rd, Register rs, Register rt) { |
| 1262 | if (kArchVariant == kLoongson) { |
| 1263 | Label done; |
| 1264 | Branch(&done, ne, rt, Operand(zero_reg)); |
| 1265 | mov(rd, rs); |
| 1266 | bind(&done); |
| 1267 | } else { |
| 1268 | movz(rd, rs, rt); |
| 1269 | } |
| 1270 | } |
| 1271 | |
| 1272 | |
| 1273 | void MacroAssembler::Movn(Register rd, Register rs, Register rt) { |
| 1274 | if (kArchVariant == kLoongson) { |
| 1275 | Label done; |
| 1276 | Branch(&done, eq, rt, Operand(zero_reg)); |
| 1277 | mov(rd, rs); |
| 1278 | bind(&done); |
| 1279 | } else { |
| 1280 | movn(rd, rs, rt); |
| 1281 | } |
| 1282 | } |
| 1283 | |
| 1284 | |
| 1285 | void MacroAssembler::Movt(Register rd, Register rs, uint16_t cc) { |
| 1286 | if (kArchVariant == kLoongson) { |
| 1287 | // Tests an FP condition code and then conditionally move rs to rd. |
| 1288 | // We do not currently use any FPU cc bit other than bit 0. |
| 1289 | ASSERT(cc == 0); |
| 1290 | ASSERT(!(rs.is(t8) || rd.is(t8))); |
| 1291 | Label done; |
| 1292 | Register scratch = t8; |
| 1293 | // For testing purposes we need to fetch content of the FCSR register and |
| 1294 | // than test its cc (floating point condition code) bit (for cc = 0, it is |
| 1295 | // 24. bit of the FCSR). |
| 1296 | cfc1(scratch, FCSR); |
| 1297 | // For the MIPS I, II and III architectures, the contents of scratch is |
| 1298 | // UNPREDICTABLE for the instruction immediately following CFC1. |
| 1299 | nop(); |
| 1300 | srl(scratch, scratch, 16); |
| 1301 | andi(scratch, scratch, 0x0080); |
| 1302 | Branch(&done, eq, scratch, Operand(zero_reg)); |
| 1303 | mov(rd, rs); |
| 1304 | bind(&done); |
| 1305 | } else { |
| 1306 | movt(rd, rs, cc); |
| 1307 | } |
| 1308 | } |
| 1309 | |
| 1310 | |
| 1311 | void MacroAssembler::Movf(Register rd, Register rs, uint16_t cc) { |
| 1312 | if (kArchVariant == kLoongson) { |
| 1313 | // Tests an FP condition code and then conditionally move rs to rd. |
| 1314 | // We do not currently use any FPU cc bit other than bit 0. |
| 1315 | ASSERT(cc == 0); |
| 1316 | ASSERT(!(rs.is(t8) || rd.is(t8))); |
| 1317 | Label done; |
| 1318 | Register scratch = t8; |
| 1319 | // For testing purposes we need to fetch content of the FCSR register and |
| 1320 | // than test its cc (floating point condition code) bit (for cc = 0, it is |
| 1321 | // 24. bit of the FCSR). |
| 1322 | cfc1(scratch, FCSR); |
| 1323 | // For the MIPS I, II and III architectures, the contents of scratch is |
| 1324 | // UNPREDICTABLE for the instruction immediately following CFC1. |
| 1325 | nop(); |
| 1326 | srl(scratch, scratch, 16); |
| 1327 | andi(scratch, scratch, 0x0080); |
| 1328 | Branch(&done, ne, scratch, Operand(zero_reg)); |
| 1329 | mov(rd, rs); |
| 1330 | bind(&done); |
| 1331 | } else { |
| 1332 | movf(rd, rs, cc); |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | void MacroAssembler::Clz(Register rd, Register rs) { |
| 1338 | if (kArchVariant == kLoongson) { |
| 1339 | ASSERT(!(rd.is(t8) || rd.is(t9)) && !(rs.is(t8) || rs.is(t9))); |
| 1340 | Register mask = t8; |
| 1341 | Register scratch = t9; |
| 1342 | Label loop, end; |
| 1343 | mov(at, rs); |
| 1344 | mov(rd, zero_reg); |
| 1345 | lui(mask, 0x8000); |
| 1346 | bind(&loop); |
| 1347 | and_(scratch, at, mask); |
| 1348 | Branch(&end, ne, scratch, Operand(zero_reg)); |
| 1349 | addiu(rd, rd, 1); |
| 1350 | Branch(&loop, ne, mask, Operand(zero_reg), USE_DELAY_SLOT); |
| 1351 | srl(mask, mask, 1); |
| 1352 | bind(&end); |
| 1353 | } else { |
| 1354 | clz(rd, rs); |
| 1355 | } |
| 1356 | } |
| 1357 | |
| 1358 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1359 | void MacroAssembler::EmitFPUTruncate(FPURoundingMode rounding_mode, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1360 | Register result, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1361 | DoubleRegister double_input, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1362 | Register scratch, |
| 1363 | DoubleRegister double_scratch, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1364 | Register except_flag, |
| 1365 | CheckForInexactConversion check_inexact) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1366 | ASSERT(!result.is(scratch)); |
| 1367 | ASSERT(!double_input.is(double_scratch)); |
| 1368 | ASSERT(!except_flag.is(scratch)); |
| 1369 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1370 | Label done; |
| 1371 | |
| 1372 | // Clear the except flag (0 = no exception) |
| 1373 | mov(except_flag, zero_reg); |
| 1374 | |
| 1375 | // Test for values that can be exactly represented as a signed 32-bit integer. |
| 1376 | cvt_w_d(double_scratch, double_input); |
| 1377 | mfc1(result, double_scratch); |
| 1378 | cvt_d_w(double_scratch, double_scratch); |
| 1379 | BranchF(&done, NULL, eq, double_input, double_scratch); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1380 | |
| 1381 | int32_t except_mask = kFCSRFlagMask; // Assume interested in all exceptions. |
| 1382 | |
| 1383 | if (check_inexact == kDontCheckForInexactConversion) { |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1384 | // Ignore inexact exceptions. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1385 | except_mask &= ~kFCSRInexactFlagMask; |
| 1386 | } |
| 1387 | |
| 1388 | // Save FCSR. |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1389 | cfc1(scratch, FCSR); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1390 | // Disable FPU exceptions. |
| 1391 | ctc1(zero_reg, FCSR); |
| 1392 | |
| 1393 | // Do operation based on rounding mode. |
| 1394 | switch (rounding_mode) { |
| 1395 | case kRoundToNearest: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1396 | Round_w_d(double_scratch, double_input); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1397 | break; |
| 1398 | case kRoundToZero: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1399 | Trunc_w_d(double_scratch, double_input); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1400 | break; |
| 1401 | case kRoundToPlusInf: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1402 | Ceil_w_d(double_scratch, double_input); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1403 | break; |
| 1404 | case kRoundToMinusInf: |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1405 | Floor_w_d(double_scratch, double_input); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1406 | break; |
| 1407 | } // End of switch-statement. |
| 1408 | |
| 1409 | // Retrieve FCSR. |
| 1410 | cfc1(except_flag, FCSR); |
| 1411 | // Restore FCSR. |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1412 | ctc1(scratch, FCSR); |
| 1413 | // Move the converted value into the result register. |
| 1414 | mfc1(result, double_scratch); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1415 | |
| 1416 | // Check for fpu exceptions. |
| 1417 | And(except_flag, except_flag, Operand(except_mask)); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 1418 | |
| 1419 | bind(&done); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1423 | void MacroAssembler::TryInlineTruncateDoubleToI(Register result, |
| 1424 | DoubleRegister double_input, |
| 1425 | Label* done) { |
| 1426 | DoubleRegister single_scratch = kLithiumScratchDouble.low(); |
| 1427 | Register scratch = at; |
| 1428 | Register scratch2 = t9; |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1429 | |
| 1430 | // Clear cumulative exception flags and save the FCSR. |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1431 | cfc1(scratch2, FCSR); |
| 1432 | ctc1(zero_reg, FCSR); |
| 1433 | // Try a conversion to a signed integer. |
| 1434 | trunc_w_d(single_scratch, double_input); |
| 1435 | mfc1(result, single_scratch); |
| 1436 | // Retrieve and restore the FCSR. |
| 1437 | cfc1(scratch, FCSR); |
| 1438 | ctc1(scratch2, FCSR); |
| 1439 | // Check for overflow and NaNs. |
| 1440 | And(scratch, |
| 1441 | scratch, |
| 1442 | kFCSROverflowFlagMask | kFCSRUnderflowFlagMask | kFCSRInvalidOpFlagMask); |
| 1443 | // If we had no exceptions we are done. |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1444 | Branch(done, eq, scratch, Operand(zero_reg)); |
| 1445 | } |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1446 | |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1447 | |
| 1448 | void MacroAssembler::TruncateDoubleToI(Register result, |
| 1449 | DoubleRegister double_input) { |
| 1450 | Label done; |
| 1451 | |
| 1452 | TryInlineTruncateDoubleToI(result, double_input, &done); |
| 1453 | |
| 1454 | // If we fell through then inline version didn't succeed - call stub instead. |
| 1455 | push(ra); |
| 1456 | Subu(sp, sp, Operand(kDoubleSize)); // Put input on stack. |
| 1457 | sdc1(double_input, MemOperand(sp, 0)); |
| 1458 | |
| 1459 | DoubleToIStub stub(sp, result, 0, true, true); |
| 1460 | CallStub(&stub); |
| 1461 | |
| 1462 | Addu(sp, sp, Operand(kDoubleSize)); |
| 1463 | pop(ra); |
| 1464 | |
| 1465 | bind(&done); |
| 1466 | } |
| 1467 | |
| 1468 | |
| 1469 | void MacroAssembler::TruncateHeapNumberToI(Register result, Register object) { |
| 1470 | Label done; |
| 1471 | DoubleRegister double_scratch = f12; |
| 1472 | ASSERT(!result.is(object)); |
| 1473 | |
| 1474 | ldc1(double_scratch, |
| 1475 | MemOperand(object, HeapNumber::kValueOffset - kHeapObjectTag)); |
| 1476 | TryInlineTruncateDoubleToI(result, double_scratch, &done); |
| 1477 | |
| 1478 | // If we fell through then inline version didn't succeed - call stub instead. |
| 1479 | push(ra); |
| 1480 | DoubleToIStub stub(object, |
| 1481 | result, |
| 1482 | HeapNumber::kValueOffset - kHeapObjectTag, |
| 1483 | true, |
| 1484 | true); |
| 1485 | CallStub(&stub); |
| 1486 | pop(ra); |
| 1487 | |
| 1488 | bind(&done); |
| 1489 | } |
| 1490 | |
| 1491 | |
| 1492 | void MacroAssembler::TruncateNumberToI(Register object, |
| 1493 | Register result, |
| 1494 | Register heap_number_map, |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1495 | Register scratch, |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1496 | Label* not_number) { |
| 1497 | Label done; |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1498 | ASSERT(!result.is(object)); |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1499 | |
| 1500 | UntagAndJumpIfSmi(result, object, &done); |
jkummerow@chromium.org | 3d00d0a | 2013-09-04 13:57:32 +0000 | [diff] [blame] | 1501 | JumpIfNotHeapNumber(object, heap_number_map, scratch, not_number); |
| 1502 | TruncateHeapNumberToI(result, object); |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 1503 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1504 | bind(&done); |
| 1505 | } |
| 1506 | |
| 1507 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1508 | void MacroAssembler::GetLeastBitsFromSmi(Register dst, |
| 1509 | Register src, |
| 1510 | int num_least_bits) { |
| 1511 | Ext(dst, src, kSmiTagSize, num_least_bits); |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | void MacroAssembler::GetLeastBitsFromInt32(Register dst, |
| 1516 | Register src, |
| 1517 | int num_least_bits) { |
| 1518 | And(dst, src, Operand((1 << num_least_bits) - 1)); |
| 1519 | } |
| 1520 | |
| 1521 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1522 | // Emulated condtional branches do not emit a nop in the branch delay slot. |
| 1523 | // |
| 1524 | // BRANCH_ARGS_CHECK checks that conditional jump arguments are correct. |
| 1525 | #define BRANCH_ARGS_CHECK(cond, rs, rt) ASSERT( \ |
| 1526 | (cond == cc_always && rs.is(zero_reg) && rt.rm().is(zero_reg)) || \ |
| 1527 | (cond != cc_always && (!rs.is(zero_reg) || !rt.rm().is(zero_reg)))) |
| 1528 | |
| 1529 | |
| 1530 | void MacroAssembler::Branch(int16_t offset, BranchDelaySlot bdslot) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1531 | BranchShort(offset, bdslot); |
| 1532 | } |
| 1533 | |
| 1534 | |
| 1535 | void MacroAssembler::Branch(int16_t offset, Condition cond, Register rs, |
| 1536 | const Operand& rt, |
| 1537 | BranchDelaySlot bdslot) { |
| 1538 | BranchShort(offset, cond, rs, rt, bdslot); |
| 1539 | } |
| 1540 | |
| 1541 | |
| 1542 | void MacroAssembler::Branch(Label* L, BranchDelaySlot bdslot) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1543 | if (L->is_bound()) { |
| 1544 | if (is_near(L)) { |
| 1545 | BranchShort(L, bdslot); |
| 1546 | } else { |
| 1547 | Jr(L, bdslot); |
| 1548 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1549 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1550 | if (is_trampoline_emitted()) { |
| 1551 | Jr(L, bdslot); |
| 1552 | } else { |
| 1553 | BranchShort(L, bdslot); |
| 1554 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | |
| 1559 | void MacroAssembler::Branch(Label* L, Condition cond, Register rs, |
| 1560 | const Operand& rt, |
| 1561 | BranchDelaySlot bdslot) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1562 | if (L->is_bound()) { |
| 1563 | if (is_near(L)) { |
| 1564 | BranchShort(L, cond, rs, rt, bdslot); |
| 1565 | } else { |
bmeurer@chromium.org | 25530ce | 2014-02-07 09:11:16 +0000 | [diff] [blame] | 1566 | if (cond != cc_always) { |
| 1567 | Label skip; |
| 1568 | Condition neg_cond = NegateCondition(cond); |
| 1569 | BranchShort(&skip, neg_cond, rs, rt); |
| 1570 | Jr(L, bdslot); |
| 1571 | bind(&skip); |
| 1572 | } else { |
| 1573 | Jr(L, bdslot); |
| 1574 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1575 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1576 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1577 | if (is_trampoline_emitted()) { |
bmeurer@chromium.org | 25530ce | 2014-02-07 09:11:16 +0000 | [diff] [blame] | 1578 | if (cond != cc_always) { |
| 1579 | Label skip; |
| 1580 | Condition neg_cond = NegateCondition(cond); |
| 1581 | BranchShort(&skip, neg_cond, rs, rt); |
| 1582 | Jr(L, bdslot); |
| 1583 | bind(&skip); |
| 1584 | } else { |
| 1585 | Jr(L, bdslot); |
| 1586 | } |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1587 | } else { |
| 1588 | BranchShort(L, cond, rs, rt, bdslot); |
| 1589 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 1594 | void MacroAssembler::Branch(Label* L, |
| 1595 | Condition cond, |
| 1596 | Register rs, |
| 1597 | Heap::RootListIndex index, |
| 1598 | BranchDelaySlot bdslot) { |
| 1599 | LoadRoot(at, index); |
| 1600 | Branch(L, cond, rs, Operand(at), bdslot); |
| 1601 | } |
| 1602 | |
| 1603 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1604 | void MacroAssembler::BranchShort(int16_t offset, BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1605 | b(offset); |
| 1606 | |
| 1607 | // Emit a nop in the branch delay slot if required. |
| 1608 | if (bdslot == PROTECT) |
| 1609 | nop(); |
| 1610 | } |
| 1611 | |
| 1612 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1613 | void MacroAssembler::BranchShort(int16_t offset, Condition cond, Register rs, |
| 1614 | const Operand& rt, |
| 1615 | BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1616 | BRANCH_ARGS_CHECK(cond, rs, rt); |
| 1617 | ASSERT(!rs.is(zero_reg)); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 1618 | Register r2 = no_reg; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1619 | Register scratch = at; |
| 1620 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1621 | if (rt.is_reg()) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 1622 | // NOTE: 'at' can be clobbered by Branch but it is legal to use it as rs or |
| 1623 | // rt. |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 1624 | BlockTrampolinePoolScope block_trampoline_pool(this); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1625 | r2 = rt.rm_; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1626 | switch (cond) { |
| 1627 | case cc_always: |
| 1628 | b(offset); |
| 1629 | break; |
| 1630 | case eq: |
| 1631 | beq(rs, r2, offset); |
| 1632 | break; |
| 1633 | case ne: |
| 1634 | bne(rs, r2, offset); |
| 1635 | break; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1636 | // Signed comparison. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1637 | case greater: |
| 1638 | if (r2.is(zero_reg)) { |
| 1639 | bgtz(rs, offset); |
| 1640 | } else { |
| 1641 | slt(scratch, r2, rs); |
| 1642 | bne(scratch, zero_reg, offset); |
| 1643 | } |
| 1644 | break; |
| 1645 | case greater_equal: |
| 1646 | if (r2.is(zero_reg)) { |
| 1647 | bgez(rs, offset); |
| 1648 | } else { |
| 1649 | slt(scratch, rs, r2); |
| 1650 | beq(scratch, zero_reg, offset); |
| 1651 | } |
| 1652 | break; |
| 1653 | case less: |
| 1654 | if (r2.is(zero_reg)) { |
| 1655 | bltz(rs, offset); |
| 1656 | } else { |
| 1657 | slt(scratch, rs, r2); |
| 1658 | bne(scratch, zero_reg, offset); |
| 1659 | } |
| 1660 | break; |
| 1661 | case less_equal: |
| 1662 | if (r2.is(zero_reg)) { |
| 1663 | blez(rs, offset); |
| 1664 | } else { |
| 1665 | slt(scratch, r2, rs); |
| 1666 | beq(scratch, zero_reg, offset); |
| 1667 | } |
| 1668 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1669 | // Unsigned comparison. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1670 | case Ugreater: |
| 1671 | if (r2.is(zero_reg)) { |
| 1672 | bgtz(rs, offset); |
| 1673 | } else { |
| 1674 | sltu(scratch, r2, rs); |
| 1675 | bne(scratch, zero_reg, offset); |
| 1676 | } |
| 1677 | break; |
| 1678 | case Ugreater_equal: |
| 1679 | if (r2.is(zero_reg)) { |
| 1680 | bgez(rs, offset); |
| 1681 | } else { |
| 1682 | sltu(scratch, rs, r2); |
| 1683 | beq(scratch, zero_reg, offset); |
| 1684 | } |
| 1685 | break; |
| 1686 | case Uless: |
| 1687 | if (r2.is(zero_reg)) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1688 | // No code needs to be emitted. |
| 1689 | return; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1690 | } else { |
| 1691 | sltu(scratch, rs, r2); |
| 1692 | bne(scratch, zero_reg, offset); |
| 1693 | } |
| 1694 | break; |
| 1695 | case Uless_equal: |
| 1696 | if (r2.is(zero_reg)) { |
| 1697 | b(offset); |
| 1698 | } else { |
| 1699 | sltu(scratch, r2, rs); |
| 1700 | beq(scratch, zero_reg, offset); |
| 1701 | } |
| 1702 | break; |
| 1703 | default: |
| 1704 | UNREACHABLE(); |
| 1705 | } |
| 1706 | } else { |
| 1707 | // Be careful to always use shifted_branch_offset only just before the |
| 1708 | // branch instruction, as the location will be remember for patching the |
| 1709 | // target. |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 1710 | BlockTrampolinePoolScope block_trampoline_pool(this); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1711 | switch (cond) { |
| 1712 | case cc_always: |
| 1713 | b(offset); |
| 1714 | break; |
| 1715 | case eq: |
| 1716 | // We don't want any other register but scratch clobbered. |
| 1717 | ASSERT(!scratch.is(rs)); |
| 1718 | r2 = scratch; |
| 1719 | li(r2, rt); |
| 1720 | beq(rs, r2, offset); |
| 1721 | break; |
| 1722 | case ne: |
| 1723 | // We don't want any other register but scratch clobbered. |
| 1724 | ASSERT(!scratch.is(rs)); |
| 1725 | r2 = scratch; |
| 1726 | li(r2, rt); |
| 1727 | bne(rs, r2, offset); |
| 1728 | break; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1729 | // Signed comparison. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1730 | case greater: |
| 1731 | if (rt.imm32_ == 0) { |
| 1732 | bgtz(rs, offset); |
| 1733 | } else { |
| 1734 | r2 = scratch; |
| 1735 | li(r2, rt); |
| 1736 | slt(scratch, r2, rs); |
| 1737 | bne(scratch, zero_reg, offset); |
| 1738 | } |
| 1739 | break; |
| 1740 | case greater_equal: |
| 1741 | if (rt.imm32_ == 0) { |
| 1742 | bgez(rs, offset); |
| 1743 | } else if (is_int16(rt.imm32_)) { |
| 1744 | slti(scratch, rs, rt.imm32_); |
| 1745 | beq(scratch, zero_reg, offset); |
| 1746 | } else { |
| 1747 | r2 = scratch; |
| 1748 | li(r2, rt); |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1749 | slt(scratch, rs, r2); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1750 | beq(scratch, zero_reg, offset); |
| 1751 | } |
| 1752 | break; |
| 1753 | case less: |
| 1754 | if (rt.imm32_ == 0) { |
| 1755 | bltz(rs, offset); |
| 1756 | } else if (is_int16(rt.imm32_)) { |
| 1757 | slti(scratch, rs, rt.imm32_); |
| 1758 | bne(scratch, zero_reg, offset); |
| 1759 | } else { |
| 1760 | r2 = scratch; |
| 1761 | li(r2, rt); |
| 1762 | slt(scratch, rs, r2); |
| 1763 | bne(scratch, zero_reg, offset); |
| 1764 | } |
| 1765 | break; |
| 1766 | case less_equal: |
| 1767 | if (rt.imm32_ == 0) { |
| 1768 | blez(rs, offset); |
| 1769 | } else { |
| 1770 | r2 = scratch; |
| 1771 | li(r2, rt); |
| 1772 | slt(scratch, r2, rs); |
| 1773 | beq(scratch, zero_reg, offset); |
| 1774 | } |
| 1775 | break; |
| 1776 | // Unsigned comparison. |
| 1777 | case Ugreater: |
| 1778 | if (rt.imm32_ == 0) { |
| 1779 | bgtz(rs, offset); |
| 1780 | } else { |
| 1781 | r2 = scratch; |
| 1782 | li(r2, rt); |
| 1783 | sltu(scratch, r2, rs); |
| 1784 | bne(scratch, zero_reg, offset); |
| 1785 | } |
| 1786 | break; |
| 1787 | case Ugreater_equal: |
| 1788 | if (rt.imm32_ == 0) { |
| 1789 | bgez(rs, offset); |
| 1790 | } else if (is_int16(rt.imm32_)) { |
| 1791 | sltiu(scratch, rs, rt.imm32_); |
| 1792 | beq(scratch, zero_reg, offset); |
| 1793 | } else { |
| 1794 | r2 = scratch; |
| 1795 | li(r2, rt); |
| 1796 | sltu(scratch, rs, r2); |
| 1797 | beq(scratch, zero_reg, offset); |
| 1798 | } |
| 1799 | break; |
| 1800 | case Uless: |
| 1801 | if (rt.imm32_ == 0) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1802 | // No code needs to be emitted. |
| 1803 | return; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1804 | } else if (is_int16(rt.imm32_)) { |
| 1805 | sltiu(scratch, rs, rt.imm32_); |
| 1806 | bne(scratch, zero_reg, offset); |
| 1807 | } else { |
| 1808 | r2 = scratch; |
| 1809 | li(r2, rt); |
| 1810 | sltu(scratch, rs, r2); |
| 1811 | bne(scratch, zero_reg, offset); |
| 1812 | } |
| 1813 | break; |
| 1814 | case Uless_equal: |
| 1815 | if (rt.imm32_ == 0) { |
| 1816 | b(offset); |
| 1817 | } else { |
| 1818 | r2 = scratch; |
| 1819 | li(r2, rt); |
| 1820 | sltu(scratch, r2, rs); |
| 1821 | beq(scratch, zero_reg, offset); |
| 1822 | } |
| 1823 | break; |
| 1824 | default: |
| 1825 | UNREACHABLE(); |
| 1826 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1827 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1828 | // Emit a nop in the branch delay slot if required. |
| 1829 | if (bdslot == PROTECT) |
| 1830 | nop(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1831 | } |
| 1832 | |
| 1833 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1834 | void MacroAssembler::BranchShort(Label* L, BranchDelaySlot bdslot) { |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1835 | // We use branch_offset as an argument for the branch instructions to be sure |
| 1836 | // it is called just before generating the branch instruction, as needed. |
| 1837 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1838 | b(shifted_branch_offset(L, false)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1839 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1840 | // Emit a nop in the branch delay slot if required. |
| 1841 | if (bdslot == PROTECT) |
| 1842 | nop(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 1843 | } |
| 1844 | |
| 1845 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1846 | void MacroAssembler::BranchShort(Label* L, Condition cond, Register rs, |
| 1847 | const Operand& rt, |
| 1848 | BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1849 | BRANCH_ARGS_CHECK(cond, rs, rt); |
| 1850 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 1851 | int32_t offset = 0; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1852 | Register r2 = no_reg; |
| 1853 | Register scratch = at; |
| 1854 | if (rt.is_reg()) { |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 1855 | BlockTrampolinePoolScope block_trampoline_pool(this); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1856 | r2 = rt.rm_; |
| 1857 | // Be careful to always use shifted_branch_offset only just before the |
| 1858 | // branch instruction, as the location will be remember for patching the |
| 1859 | // target. |
| 1860 | switch (cond) { |
| 1861 | case cc_always: |
| 1862 | offset = shifted_branch_offset(L, false); |
| 1863 | b(offset); |
| 1864 | break; |
| 1865 | case eq: |
| 1866 | offset = shifted_branch_offset(L, false); |
| 1867 | beq(rs, r2, offset); |
| 1868 | break; |
| 1869 | case ne: |
| 1870 | offset = shifted_branch_offset(L, false); |
| 1871 | bne(rs, r2, offset); |
| 1872 | break; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1873 | // Signed comparison. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1874 | case greater: |
| 1875 | if (r2.is(zero_reg)) { |
| 1876 | offset = shifted_branch_offset(L, false); |
| 1877 | bgtz(rs, offset); |
| 1878 | } else { |
| 1879 | slt(scratch, r2, rs); |
| 1880 | offset = shifted_branch_offset(L, false); |
| 1881 | bne(scratch, zero_reg, offset); |
| 1882 | } |
| 1883 | break; |
| 1884 | case greater_equal: |
| 1885 | if (r2.is(zero_reg)) { |
| 1886 | offset = shifted_branch_offset(L, false); |
| 1887 | bgez(rs, offset); |
| 1888 | } else { |
| 1889 | slt(scratch, rs, r2); |
| 1890 | offset = shifted_branch_offset(L, false); |
| 1891 | beq(scratch, zero_reg, offset); |
| 1892 | } |
| 1893 | break; |
| 1894 | case less: |
| 1895 | if (r2.is(zero_reg)) { |
| 1896 | offset = shifted_branch_offset(L, false); |
| 1897 | bltz(rs, offset); |
| 1898 | } else { |
| 1899 | slt(scratch, rs, r2); |
| 1900 | offset = shifted_branch_offset(L, false); |
| 1901 | bne(scratch, zero_reg, offset); |
| 1902 | } |
| 1903 | break; |
| 1904 | case less_equal: |
| 1905 | if (r2.is(zero_reg)) { |
| 1906 | offset = shifted_branch_offset(L, false); |
| 1907 | blez(rs, offset); |
| 1908 | } else { |
| 1909 | slt(scratch, r2, rs); |
| 1910 | offset = shifted_branch_offset(L, false); |
| 1911 | beq(scratch, zero_reg, offset); |
| 1912 | } |
| 1913 | break; |
| 1914 | // Unsigned comparison. |
| 1915 | case Ugreater: |
| 1916 | if (r2.is(zero_reg)) { |
| 1917 | offset = shifted_branch_offset(L, false); |
| 1918 | bgtz(rs, offset); |
| 1919 | } else { |
| 1920 | sltu(scratch, r2, rs); |
| 1921 | offset = shifted_branch_offset(L, false); |
| 1922 | bne(scratch, zero_reg, offset); |
| 1923 | } |
| 1924 | break; |
| 1925 | case Ugreater_equal: |
| 1926 | if (r2.is(zero_reg)) { |
| 1927 | offset = shifted_branch_offset(L, false); |
| 1928 | bgez(rs, offset); |
| 1929 | } else { |
| 1930 | sltu(scratch, rs, r2); |
| 1931 | offset = shifted_branch_offset(L, false); |
| 1932 | beq(scratch, zero_reg, offset); |
| 1933 | } |
| 1934 | break; |
| 1935 | case Uless: |
| 1936 | if (r2.is(zero_reg)) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 1937 | // No code needs to be emitted. |
| 1938 | return; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1939 | } else { |
| 1940 | sltu(scratch, rs, r2); |
| 1941 | offset = shifted_branch_offset(L, false); |
| 1942 | bne(scratch, zero_reg, offset); |
| 1943 | } |
| 1944 | break; |
| 1945 | case Uless_equal: |
| 1946 | if (r2.is(zero_reg)) { |
| 1947 | offset = shifted_branch_offset(L, false); |
| 1948 | b(offset); |
| 1949 | } else { |
| 1950 | sltu(scratch, r2, rs); |
| 1951 | offset = shifted_branch_offset(L, false); |
| 1952 | beq(scratch, zero_reg, offset); |
| 1953 | } |
| 1954 | break; |
| 1955 | default: |
| 1956 | UNREACHABLE(); |
| 1957 | } |
| 1958 | } else { |
| 1959 | // Be careful to always use shifted_branch_offset only just before the |
| 1960 | // branch instruction, as the location will be remember for patching the |
| 1961 | // target. |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 1962 | BlockTrampolinePoolScope block_trampoline_pool(this); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1963 | switch (cond) { |
| 1964 | case cc_always: |
| 1965 | offset = shifted_branch_offset(L, false); |
| 1966 | b(offset); |
| 1967 | break; |
| 1968 | case eq: |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1969 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1970 | r2 = scratch; |
| 1971 | li(r2, rt); |
| 1972 | offset = shifted_branch_offset(L, false); |
| 1973 | beq(rs, r2, offset); |
| 1974 | break; |
| 1975 | case ne: |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1976 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1977 | r2 = scratch; |
| 1978 | li(r2, rt); |
| 1979 | offset = shifted_branch_offset(L, false); |
| 1980 | bne(rs, r2, offset); |
| 1981 | break; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1982 | // Signed comparison. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1983 | case greater: |
| 1984 | if (rt.imm32_ == 0) { |
| 1985 | offset = shifted_branch_offset(L, false); |
| 1986 | bgtz(rs, offset); |
| 1987 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 1988 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1989 | r2 = scratch; |
| 1990 | li(r2, rt); |
| 1991 | slt(scratch, r2, rs); |
| 1992 | offset = shifted_branch_offset(L, false); |
| 1993 | bne(scratch, zero_reg, offset); |
| 1994 | } |
| 1995 | break; |
| 1996 | case greater_equal: |
| 1997 | if (rt.imm32_ == 0) { |
| 1998 | offset = shifted_branch_offset(L, false); |
| 1999 | bgez(rs, offset); |
| 2000 | } else if (is_int16(rt.imm32_)) { |
| 2001 | slti(scratch, rs, rt.imm32_); |
| 2002 | offset = shifted_branch_offset(L, false); |
| 2003 | beq(scratch, zero_reg, offset); |
| 2004 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2005 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2006 | r2 = scratch; |
| 2007 | li(r2, rt); |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2008 | slt(scratch, rs, r2); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2009 | offset = shifted_branch_offset(L, false); |
| 2010 | beq(scratch, zero_reg, offset); |
| 2011 | } |
| 2012 | break; |
| 2013 | case less: |
| 2014 | if (rt.imm32_ == 0) { |
| 2015 | offset = shifted_branch_offset(L, false); |
| 2016 | bltz(rs, offset); |
| 2017 | } else if (is_int16(rt.imm32_)) { |
| 2018 | slti(scratch, rs, rt.imm32_); |
| 2019 | offset = shifted_branch_offset(L, false); |
| 2020 | bne(scratch, zero_reg, offset); |
| 2021 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2022 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2023 | r2 = scratch; |
| 2024 | li(r2, rt); |
| 2025 | slt(scratch, rs, r2); |
| 2026 | offset = shifted_branch_offset(L, false); |
| 2027 | bne(scratch, zero_reg, offset); |
| 2028 | } |
| 2029 | break; |
| 2030 | case less_equal: |
| 2031 | if (rt.imm32_ == 0) { |
| 2032 | offset = shifted_branch_offset(L, false); |
| 2033 | blez(rs, offset); |
| 2034 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2035 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2036 | r2 = scratch; |
| 2037 | li(r2, rt); |
| 2038 | slt(scratch, r2, rs); |
| 2039 | offset = shifted_branch_offset(L, false); |
| 2040 | beq(scratch, zero_reg, offset); |
| 2041 | } |
| 2042 | break; |
| 2043 | // Unsigned comparison. |
| 2044 | case Ugreater: |
| 2045 | if (rt.imm32_ == 0) { |
| 2046 | offset = shifted_branch_offset(L, false); |
| 2047 | bgtz(rs, offset); |
| 2048 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2049 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2050 | r2 = scratch; |
| 2051 | li(r2, rt); |
| 2052 | sltu(scratch, r2, rs); |
| 2053 | offset = shifted_branch_offset(L, false); |
| 2054 | bne(scratch, zero_reg, offset); |
| 2055 | } |
| 2056 | break; |
| 2057 | case Ugreater_equal: |
| 2058 | if (rt.imm32_ == 0) { |
| 2059 | offset = shifted_branch_offset(L, false); |
| 2060 | bgez(rs, offset); |
| 2061 | } else if (is_int16(rt.imm32_)) { |
| 2062 | sltiu(scratch, rs, rt.imm32_); |
| 2063 | offset = shifted_branch_offset(L, false); |
| 2064 | beq(scratch, zero_reg, offset); |
| 2065 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2066 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2067 | r2 = scratch; |
| 2068 | li(r2, rt); |
| 2069 | sltu(scratch, rs, r2); |
| 2070 | offset = shifted_branch_offset(L, false); |
| 2071 | beq(scratch, zero_reg, offset); |
| 2072 | } |
| 2073 | break; |
| 2074 | case Uless: |
| 2075 | if (rt.imm32_ == 0) { |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2076 | // No code needs to be emitted. |
| 2077 | return; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2078 | } else if (is_int16(rt.imm32_)) { |
| 2079 | sltiu(scratch, rs, rt.imm32_); |
| 2080 | offset = shifted_branch_offset(L, false); |
| 2081 | bne(scratch, zero_reg, offset); |
| 2082 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2083 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2084 | r2 = scratch; |
| 2085 | li(r2, rt); |
| 2086 | sltu(scratch, rs, r2); |
| 2087 | offset = shifted_branch_offset(L, false); |
| 2088 | bne(scratch, zero_reg, offset); |
| 2089 | } |
| 2090 | break; |
| 2091 | case Uless_equal: |
| 2092 | if (rt.imm32_ == 0) { |
| 2093 | offset = shifted_branch_offset(L, false); |
| 2094 | b(offset); |
| 2095 | } else { |
yangguo@chromium.org | 80c42ed | 2011-08-31 09:03:56 +0000 | [diff] [blame] | 2096 | ASSERT(!scratch.is(rs)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2097 | r2 = scratch; |
| 2098 | li(r2, rt); |
| 2099 | sltu(scratch, r2, rs); |
| 2100 | offset = shifted_branch_offset(L, false); |
| 2101 | beq(scratch, zero_reg, offset); |
| 2102 | } |
| 2103 | break; |
| 2104 | default: |
| 2105 | UNREACHABLE(); |
| 2106 | } |
| 2107 | } |
| 2108 | // Check that offset could actually hold on an int16_t. |
| 2109 | ASSERT(is_int16(offset)); |
| 2110 | // Emit a nop in the branch delay slot if required. |
| 2111 | if (bdslot == PROTECT) |
| 2112 | nop(); |
| 2113 | } |
| 2114 | |
| 2115 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2116 | void MacroAssembler::BranchAndLink(int16_t offset, BranchDelaySlot bdslot) { |
| 2117 | BranchAndLinkShort(offset, bdslot); |
| 2118 | } |
| 2119 | |
| 2120 | |
| 2121 | void MacroAssembler::BranchAndLink(int16_t offset, Condition cond, Register rs, |
| 2122 | const Operand& rt, |
| 2123 | BranchDelaySlot bdslot) { |
| 2124 | BranchAndLinkShort(offset, cond, rs, rt, bdslot); |
| 2125 | } |
| 2126 | |
| 2127 | |
| 2128 | void MacroAssembler::BranchAndLink(Label* L, BranchDelaySlot bdslot) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2129 | if (L->is_bound()) { |
| 2130 | if (is_near(L)) { |
| 2131 | BranchAndLinkShort(L, bdslot); |
| 2132 | } else { |
| 2133 | Jalr(L, bdslot); |
| 2134 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2135 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2136 | if (is_trampoline_emitted()) { |
| 2137 | Jalr(L, bdslot); |
| 2138 | } else { |
| 2139 | BranchAndLinkShort(L, bdslot); |
| 2140 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2141 | } |
| 2142 | } |
| 2143 | |
| 2144 | |
| 2145 | void MacroAssembler::BranchAndLink(Label* L, Condition cond, Register rs, |
| 2146 | const Operand& rt, |
| 2147 | BranchDelaySlot bdslot) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2148 | if (L->is_bound()) { |
| 2149 | if (is_near(L)) { |
| 2150 | BranchAndLinkShort(L, cond, rs, rt, bdslot); |
| 2151 | } else { |
| 2152 | Label skip; |
| 2153 | Condition neg_cond = NegateCondition(cond); |
| 2154 | BranchShort(&skip, neg_cond, rs, rt); |
| 2155 | Jalr(L, bdslot); |
| 2156 | bind(&skip); |
| 2157 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2158 | } else { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2159 | if (is_trampoline_emitted()) { |
| 2160 | Label skip; |
| 2161 | Condition neg_cond = NegateCondition(cond); |
| 2162 | BranchShort(&skip, neg_cond, rs, rt); |
| 2163 | Jalr(L, bdslot); |
| 2164 | bind(&skip); |
| 2165 | } else { |
| 2166 | BranchAndLinkShort(L, cond, rs, rt, bdslot); |
| 2167 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2168 | } |
| 2169 | } |
| 2170 | |
| 2171 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2172 | // We need to use a bgezal or bltzal, but they can't be used directly with the |
| 2173 | // slt instructions. We could use sub or add instead but we would miss overflow |
| 2174 | // cases, so we keep slt and add an intermediate third instruction. |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2175 | void MacroAssembler::BranchAndLinkShort(int16_t offset, |
| 2176 | BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2177 | bal(offset); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2178 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2179 | // Emit a nop in the branch delay slot if required. |
| 2180 | if (bdslot == PROTECT) |
| 2181 | nop(); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2182 | } |
| 2183 | |
| 2184 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2185 | void MacroAssembler::BranchAndLinkShort(int16_t offset, Condition cond, |
| 2186 | Register rs, const Operand& rt, |
| 2187 | BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2188 | BRANCH_ARGS_CHECK(cond, rs, rt); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2189 | Register r2 = no_reg; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2190 | Register scratch = at; |
| 2191 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2192 | if (rt.is_reg()) { |
| 2193 | r2 = rt.rm_; |
| 2194 | } else if (cond != cc_always) { |
| 2195 | r2 = scratch; |
| 2196 | li(r2, rt); |
| 2197 | } |
| 2198 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2199 | { |
| 2200 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2201 | switch (cond) { |
| 2202 | case cc_always: |
| 2203 | bal(offset); |
| 2204 | break; |
| 2205 | case eq: |
| 2206 | bne(rs, r2, 2); |
| 2207 | nop(); |
| 2208 | bal(offset); |
| 2209 | break; |
| 2210 | case ne: |
| 2211 | beq(rs, r2, 2); |
| 2212 | nop(); |
| 2213 | bal(offset); |
| 2214 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2215 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2216 | // Signed comparison. |
| 2217 | case greater: |
| 2218 | slt(scratch, r2, rs); |
| 2219 | addiu(scratch, scratch, -1); |
| 2220 | bgezal(scratch, offset); |
| 2221 | break; |
| 2222 | case greater_equal: |
| 2223 | slt(scratch, rs, r2); |
| 2224 | addiu(scratch, scratch, -1); |
| 2225 | bltzal(scratch, offset); |
| 2226 | break; |
| 2227 | case less: |
| 2228 | slt(scratch, rs, r2); |
| 2229 | addiu(scratch, scratch, -1); |
| 2230 | bgezal(scratch, offset); |
| 2231 | break; |
| 2232 | case less_equal: |
| 2233 | slt(scratch, r2, rs); |
| 2234 | addiu(scratch, scratch, -1); |
| 2235 | bltzal(scratch, offset); |
| 2236 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2237 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2238 | // Unsigned comparison. |
| 2239 | case Ugreater: |
| 2240 | sltu(scratch, r2, rs); |
| 2241 | addiu(scratch, scratch, -1); |
| 2242 | bgezal(scratch, offset); |
| 2243 | break; |
| 2244 | case Ugreater_equal: |
| 2245 | sltu(scratch, rs, r2); |
| 2246 | addiu(scratch, scratch, -1); |
| 2247 | bltzal(scratch, offset); |
| 2248 | break; |
| 2249 | case Uless: |
| 2250 | sltu(scratch, rs, r2); |
| 2251 | addiu(scratch, scratch, -1); |
| 2252 | bgezal(scratch, offset); |
| 2253 | break; |
| 2254 | case Uless_equal: |
| 2255 | sltu(scratch, r2, rs); |
| 2256 | addiu(scratch, scratch, -1); |
| 2257 | bltzal(scratch, offset); |
| 2258 | break; |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2259 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2260 | default: |
| 2261 | UNREACHABLE(); |
| 2262 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2263 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2264 | // Emit a nop in the branch delay slot if required. |
| 2265 | if (bdslot == PROTECT) |
| 2266 | nop(); |
| 2267 | } |
| 2268 | |
| 2269 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2270 | void MacroAssembler::BranchAndLinkShort(Label* L, BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2271 | bal(shifted_branch_offset(L, false)); |
| 2272 | |
| 2273 | // Emit a nop in the branch delay slot if required. |
| 2274 | if (bdslot == PROTECT) |
| 2275 | nop(); |
| 2276 | } |
| 2277 | |
| 2278 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2279 | void MacroAssembler::BranchAndLinkShort(Label* L, Condition cond, Register rs, |
| 2280 | const Operand& rt, |
| 2281 | BranchDelaySlot bdslot) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2282 | BRANCH_ARGS_CHECK(cond, rs, rt); |
| 2283 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2284 | int32_t offset = 0; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2285 | Register r2 = no_reg; |
| 2286 | Register scratch = at; |
| 2287 | if (rt.is_reg()) { |
| 2288 | r2 = rt.rm_; |
| 2289 | } else if (cond != cc_always) { |
| 2290 | r2 = scratch; |
| 2291 | li(r2, rt); |
| 2292 | } |
| 2293 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2294 | { |
| 2295 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2296 | switch (cond) { |
| 2297 | case cc_always: |
| 2298 | offset = shifted_branch_offset(L, false); |
| 2299 | bal(offset); |
| 2300 | break; |
| 2301 | case eq: |
| 2302 | bne(rs, r2, 2); |
| 2303 | nop(); |
| 2304 | offset = shifted_branch_offset(L, false); |
| 2305 | bal(offset); |
| 2306 | break; |
| 2307 | case ne: |
| 2308 | beq(rs, r2, 2); |
| 2309 | nop(); |
| 2310 | offset = shifted_branch_offset(L, false); |
| 2311 | bal(offset); |
| 2312 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2313 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2314 | // Signed comparison. |
| 2315 | case greater: |
| 2316 | slt(scratch, r2, rs); |
| 2317 | addiu(scratch, scratch, -1); |
| 2318 | offset = shifted_branch_offset(L, false); |
| 2319 | bgezal(scratch, offset); |
| 2320 | break; |
| 2321 | case greater_equal: |
| 2322 | slt(scratch, rs, r2); |
| 2323 | addiu(scratch, scratch, -1); |
| 2324 | offset = shifted_branch_offset(L, false); |
| 2325 | bltzal(scratch, offset); |
| 2326 | break; |
| 2327 | case less: |
| 2328 | slt(scratch, rs, r2); |
| 2329 | addiu(scratch, scratch, -1); |
| 2330 | offset = shifted_branch_offset(L, false); |
| 2331 | bgezal(scratch, offset); |
| 2332 | break; |
| 2333 | case less_equal: |
| 2334 | slt(scratch, r2, rs); |
| 2335 | addiu(scratch, scratch, -1); |
| 2336 | offset = shifted_branch_offset(L, false); |
| 2337 | bltzal(scratch, offset); |
| 2338 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2339 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2340 | // Unsigned comparison. |
| 2341 | case Ugreater: |
| 2342 | sltu(scratch, r2, rs); |
| 2343 | addiu(scratch, scratch, -1); |
| 2344 | offset = shifted_branch_offset(L, false); |
| 2345 | bgezal(scratch, offset); |
| 2346 | break; |
| 2347 | case Ugreater_equal: |
| 2348 | sltu(scratch, rs, r2); |
| 2349 | addiu(scratch, scratch, -1); |
| 2350 | offset = shifted_branch_offset(L, false); |
| 2351 | bltzal(scratch, offset); |
| 2352 | break; |
| 2353 | case Uless: |
| 2354 | sltu(scratch, rs, r2); |
| 2355 | addiu(scratch, scratch, -1); |
| 2356 | offset = shifted_branch_offset(L, false); |
| 2357 | bgezal(scratch, offset); |
| 2358 | break; |
| 2359 | case Uless_equal: |
| 2360 | sltu(scratch, r2, rs); |
| 2361 | addiu(scratch, scratch, -1); |
| 2362 | offset = shifted_branch_offset(L, false); |
| 2363 | bltzal(scratch, offset); |
| 2364 | break; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2365 | |
jkummerow@chromium.org | 7bd87f0 | 2013-03-20 18:06:29 +0000 | [diff] [blame] | 2366 | default: |
| 2367 | UNREACHABLE(); |
| 2368 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2369 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2370 | // Check that offset could actually hold on an int16_t. |
| 2371 | ASSERT(is_int16(offset)); |
| 2372 | |
| 2373 | // Emit a nop in the branch delay slot if required. |
| 2374 | if (bdslot == PROTECT) |
| 2375 | nop(); |
| 2376 | } |
| 2377 | |
| 2378 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2379 | void MacroAssembler::Jump(Register target, |
| 2380 | Condition cond, |
| 2381 | Register rs, |
| 2382 | const Operand& rt, |
| 2383 | BranchDelaySlot bd) { |
| 2384 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2385 | if (cond == cc_always) { |
| 2386 | jr(target); |
| 2387 | } else { |
| 2388 | BRANCH_ARGS_CHECK(cond, rs, rt); |
| 2389 | Branch(2, NegateCondition(cond), rs, rt); |
| 2390 | jr(target); |
| 2391 | } |
| 2392 | // Emit a nop in the branch delay slot if required. |
| 2393 | if (bd == PROTECT) |
| 2394 | nop(); |
| 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | void MacroAssembler::Jump(intptr_t target, |
| 2399 | RelocInfo::Mode rmode, |
| 2400 | Condition cond, |
| 2401 | Register rs, |
| 2402 | const Operand& rt, |
| 2403 | BranchDelaySlot bd) { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2404 | Label skip; |
| 2405 | if (cond != cc_always) { |
| 2406 | Branch(USE_DELAY_SLOT, &skip, NegateCondition(cond), rs, rt); |
| 2407 | } |
| 2408 | // The first instruction of 'li' may be placed in the delay slot. |
| 2409 | // This is not an issue, t9 is expected to be clobbered anyway. |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2410 | li(t9, Operand(target, rmode)); |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2411 | Jump(t9, al, zero_reg, Operand(zero_reg), bd); |
| 2412 | bind(&skip); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2413 | } |
| 2414 | |
| 2415 | |
| 2416 | void MacroAssembler::Jump(Address target, |
| 2417 | RelocInfo::Mode rmode, |
| 2418 | Condition cond, |
| 2419 | Register rs, |
| 2420 | const Operand& rt, |
| 2421 | BranchDelaySlot bd) { |
| 2422 | ASSERT(!RelocInfo::IsCodeTarget(rmode)); |
| 2423 | Jump(reinterpret_cast<intptr_t>(target), rmode, cond, rs, rt, bd); |
| 2424 | } |
| 2425 | |
| 2426 | |
| 2427 | void MacroAssembler::Jump(Handle<Code> code, |
| 2428 | RelocInfo::Mode rmode, |
| 2429 | Condition cond, |
| 2430 | Register rs, |
| 2431 | const Operand& rt, |
| 2432 | BranchDelaySlot bd) { |
| 2433 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 2434 | AllowDeferredHandleDereference embedding_raw_address; |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2435 | Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond, rs, rt, bd); |
| 2436 | } |
| 2437 | |
| 2438 | |
| 2439 | int MacroAssembler::CallSize(Register target, |
| 2440 | Condition cond, |
| 2441 | Register rs, |
| 2442 | const Operand& rt, |
| 2443 | BranchDelaySlot bd) { |
| 2444 | int size = 0; |
| 2445 | |
| 2446 | if (cond == cc_always) { |
| 2447 | size += 1; |
| 2448 | } else { |
| 2449 | size += 3; |
| 2450 | } |
| 2451 | |
| 2452 | if (bd == PROTECT) |
| 2453 | size += 1; |
| 2454 | |
| 2455 | return size * kInstrSize; |
| 2456 | } |
| 2457 | |
| 2458 | |
| 2459 | // Note: To call gcc-compiled C code on mips, you must call thru t9. |
| 2460 | void MacroAssembler::Call(Register target, |
| 2461 | Condition cond, |
| 2462 | Register rs, |
| 2463 | const Operand& rt, |
| 2464 | BranchDelaySlot bd) { |
| 2465 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2466 | Label start; |
| 2467 | bind(&start); |
| 2468 | if (cond == cc_always) { |
| 2469 | jalr(target); |
| 2470 | } else { |
| 2471 | BRANCH_ARGS_CHECK(cond, rs, rt); |
| 2472 | Branch(2, NegateCondition(cond), rs, rt); |
| 2473 | jalr(target); |
| 2474 | } |
| 2475 | // Emit a nop in the branch delay slot if required. |
| 2476 | if (bd == PROTECT) |
| 2477 | nop(); |
| 2478 | |
| 2479 | ASSERT_EQ(CallSize(target, cond, rs, rt, bd), |
| 2480 | SizeOfCodeGeneratedSince(&start)); |
| 2481 | } |
| 2482 | |
| 2483 | |
| 2484 | int MacroAssembler::CallSize(Address target, |
| 2485 | RelocInfo::Mode rmode, |
| 2486 | Condition cond, |
| 2487 | Register rs, |
| 2488 | const Operand& rt, |
| 2489 | BranchDelaySlot bd) { |
| 2490 | int size = CallSize(t9, cond, rs, rt, bd); |
| 2491 | return size + 2 * kInstrSize; |
| 2492 | } |
| 2493 | |
| 2494 | |
| 2495 | void MacroAssembler::Call(Address target, |
| 2496 | RelocInfo::Mode rmode, |
| 2497 | Condition cond, |
| 2498 | Register rs, |
| 2499 | const Operand& rt, |
| 2500 | BranchDelaySlot bd) { |
| 2501 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2502 | Label start; |
| 2503 | bind(&start); |
| 2504 | int32_t target_int = reinterpret_cast<int32_t>(target); |
| 2505 | // Must record previous source positions before the |
| 2506 | // li() generates a new code target. |
| 2507 | positions_recorder()->WriteRecordedPositions(); |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 2508 | li(t9, Operand(target_int, rmode), CONSTANT_SIZE); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2509 | Call(t9, cond, rs, rt, bd); |
| 2510 | ASSERT_EQ(CallSize(target, rmode, cond, rs, rt, bd), |
| 2511 | SizeOfCodeGeneratedSince(&start)); |
| 2512 | } |
| 2513 | |
| 2514 | |
| 2515 | int MacroAssembler::CallSize(Handle<Code> code, |
| 2516 | RelocInfo::Mode rmode, |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 2517 | TypeFeedbackId ast_id, |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2518 | Condition cond, |
| 2519 | Register rs, |
| 2520 | const Operand& rt, |
| 2521 | BranchDelaySlot bd) { |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 2522 | AllowDeferredHandleDereference using_raw_address; |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2523 | return CallSize(reinterpret_cast<Address>(code.location()), |
| 2524 | rmode, cond, rs, rt, bd); |
| 2525 | } |
| 2526 | |
| 2527 | |
| 2528 | void MacroAssembler::Call(Handle<Code> code, |
| 2529 | RelocInfo::Mode rmode, |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 2530 | TypeFeedbackId ast_id, |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2531 | Condition cond, |
| 2532 | Register rs, |
| 2533 | const Operand& rt, |
| 2534 | BranchDelaySlot bd) { |
| 2535 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2536 | Label start; |
| 2537 | bind(&start); |
| 2538 | ASSERT(RelocInfo::IsCodeTarget(rmode)); |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 2539 | if (rmode == RelocInfo::CODE_TARGET && !ast_id.IsNone()) { |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 2540 | SetRecordedAstId(ast_id); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2541 | rmode = RelocInfo::CODE_TARGET_WITH_ID; |
| 2542 | } |
rossberg@chromium.org | 79e7902 | 2013-06-03 15:43:46 +0000 | [diff] [blame] | 2543 | AllowDeferredHandleDereference embedding_raw_address; |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2544 | Call(reinterpret_cast<Address>(code.location()), rmode, cond, rs, rt, bd); |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2545 | ASSERT_EQ(CallSize(code, rmode, ast_id, cond, rs, rt, bd), |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2546 | SizeOfCodeGeneratedSince(&start)); |
| 2547 | } |
| 2548 | |
| 2549 | |
| 2550 | void MacroAssembler::Ret(Condition cond, |
| 2551 | Register rs, |
| 2552 | const Operand& rt, |
| 2553 | BranchDelaySlot bd) { |
| 2554 | Jump(ra, cond, rs, rt, bd); |
| 2555 | } |
| 2556 | |
| 2557 | |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2558 | void MacroAssembler::J(Label* L, BranchDelaySlot bdslot) { |
| 2559 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2560 | |
| 2561 | uint32_t imm28; |
| 2562 | imm28 = jump_address(L); |
| 2563 | imm28 &= kImm28Mask; |
| 2564 | { BlockGrowBufferScope block_buf_growth(this); |
| 2565 | // Buffer growth (and relocation) must be blocked for internal references |
| 2566 | // until associated instructions are emitted and available to be patched. |
| 2567 | RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| 2568 | j(imm28); |
| 2569 | } |
| 2570 | // Emit a nop in the branch delay slot if required. |
| 2571 | if (bdslot == PROTECT) |
| 2572 | nop(); |
| 2573 | } |
| 2574 | |
| 2575 | |
| 2576 | void MacroAssembler::Jr(Label* L, BranchDelaySlot bdslot) { |
| 2577 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2578 | |
| 2579 | uint32_t imm32; |
| 2580 | imm32 = jump_address(L); |
| 2581 | { BlockGrowBufferScope block_buf_growth(this); |
| 2582 | // Buffer growth (and relocation) must be blocked for internal references |
| 2583 | // until associated instructions are emitted and available to be patched. |
| 2584 | RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| 2585 | lui(at, (imm32 & kHiMask) >> kLuiShift); |
| 2586 | ori(at, at, (imm32 & kImm16Mask)); |
| 2587 | } |
| 2588 | jr(at); |
| 2589 | |
| 2590 | // Emit a nop in the branch delay slot if required. |
| 2591 | if (bdslot == PROTECT) |
| 2592 | nop(); |
| 2593 | } |
| 2594 | |
| 2595 | |
| 2596 | void MacroAssembler::Jalr(Label* L, BranchDelaySlot bdslot) { |
| 2597 | BlockTrampolinePoolScope block_trampoline_pool(this); |
| 2598 | |
| 2599 | uint32_t imm32; |
| 2600 | imm32 = jump_address(L); |
| 2601 | { BlockGrowBufferScope block_buf_growth(this); |
| 2602 | // Buffer growth (and relocation) must be blocked for internal references |
| 2603 | // until associated instructions are emitted and available to be patched. |
| 2604 | RecordRelocInfo(RelocInfo::INTERNAL_REFERENCE); |
| 2605 | lui(at, (imm32 & kHiMask) >> kLuiShift); |
| 2606 | ori(at, at, (imm32 & kImm16Mask)); |
| 2607 | } |
| 2608 | jalr(at); |
| 2609 | |
| 2610 | // Emit a nop in the branch delay slot if required. |
| 2611 | if (bdslot == PROTECT) |
| 2612 | nop(); |
| 2613 | } |
| 2614 | |
mstarzinger@chromium.org | e0e1b0d | 2013-07-08 08:38:06 +0000 | [diff] [blame] | 2615 | |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2616 | void MacroAssembler::DropAndRet(int drop) { |
| 2617 | Ret(USE_DELAY_SLOT); |
| 2618 | addiu(sp, sp, drop * kPointerSize); |
| 2619 | } |
vegorov@chromium.org | 3cf4731 | 2011-06-29 13:20:01 +0000 | [diff] [blame] | 2620 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2621 | void MacroAssembler::DropAndRet(int drop, |
| 2622 | Condition cond, |
| 2623 | Register r1, |
| 2624 | const Operand& r2) { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2625 | // Both Drop and Ret need to be conditional. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2626 | Label skip; |
| 2627 | if (cond != cc_always) { |
| 2628 | Branch(&skip, NegateCondition(cond), r1, r2); |
| 2629 | } |
| 2630 | |
| 2631 | Drop(drop); |
| 2632 | Ret(); |
| 2633 | |
| 2634 | if (cond != cc_always) { |
| 2635 | bind(&skip); |
| 2636 | } |
| 2637 | } |
| 2638 | |
| 2639 | |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 2640 | void MacroAssembler::Drop(int count, |
| 2641 | Condition cond, |
| 2642 | Register reg, |
| 2643 | const Operand& op) { |
| 2644 | if (count <= 0) { |
| 2645 | return; |
| 2646 | } |
| 2647 | |
| 2648 | Label skip; |
| 2649 | |
| 2650 | if (cond != al) { |
| 2651 | Branch(&skip, NegateCondition(cond), reg, op); |
| 2652 | } |
| 2653 | |
| 2654 | addiu(sp, sp, count * kPointerSize); |
| 2655 | |
| 2656 | if (cond != al) { |
| 2657 | bind(&skip); |
| 2658 | } |
| 2659 | } |
| 2660 | |
| 2661 | |
| 2662 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2663 | void MacroAssembler::Swap(Register reg1, |
| 2664 | Register reg2, |
| 2665 | Register scratch) { |
| 2666 | if (scratch.is(no_reg)) { |
| 2667 | Xor(reg1, reg1, Operand(reg2)); |
| 2668 | Xor(reg2, reg2, Operand(reg1)); |
| 2669 | Xor(reg1, reg1, Operand(reg2)); |
| 2670 | } else { |
| 2671 | mov(scratch, reg1); |
| 2672 | mov(reg1, reg2); |
| 2673 | mov(reg2, scratch); |
| 2674 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2675 | } |
| 2676 | |
| 2677 | |
| 2678 | void MacroAssembler::Call(Label* target) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2679 | BranchAndLink(target); |
| 2680 | } |
| 2681 | |
| 2682 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 2683 | void MacroAssembler::Push(Handle<Object> handle) { |
| 2684 | li(at, Operand(handle)); |
| 2685 | push(at); |
| 2686 | } |
| 2687 | |
| 2688 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2689 | #ifdef ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2690 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2691 | void MacroAssembler::DebugBreak() { |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 2692 | PrepareCEntryArgs(0); |
| 2693 | PrepareCEntryFunction(ExternalReference(Runtime::kDebugBreak, isolate())); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2694 | CEntryStub ces(1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 2695 | ASSERT(AllowThisStubCall(&ces)); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 2696 | Call(ces.GetCode(isolate()), RelocInfo::DEBUG_BREAK); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2697 | } |
| 2698 | |
| 2699 | #endif // ENABLE_DEBUGGER_SUPPORT |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 2700 | |
| 2701 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2702 | // --------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2703 | // Exception handling. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2704 | |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2705 | void MacroAssembler::PushTryHandler(StackHandler::Kind kind, |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2706 | int handler_index) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2707 | // Adjust this code if not the case. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2708 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 2709 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2710 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2711 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2712 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2713 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2714 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2715 | // For the JSEntry handler, we must preserve a0-a3 and s0. |
| 2716 | // t1-t3 are available. We will build up the handler from the bottom by |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2717 | // pushing on the stack. |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2718 | // Set up the code object (t1) and the state (t2) for pushing. |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2719 | unsigned state = |
| 2720 | StackHandler::IndexField::encode(handler_index) | |
| 2721 | StackHandler::KindField::encode(kind); |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 2722 | li(t1, Operand(CodeObject()), CONSTANT_SIZE); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2723 | li(t2, Operand(state)); |
| 2724 | |
| 2725 | // Push the frame pointer, context, state, and code object. |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2726 | if (kind == StackHandler::JS_ENTRY) { |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2727 | ASSERT_EQ(Smi::FromInt(0), 0); |
| 2728 | // The second zero_reg indicates no context. |
| 2729 | // The first zero_reg is the NULL frame pointer. |
| 2730 | // The operands are reversed to match the order of MultiPush/Pop. |
| 2731 | Push(zero_reg, zero_reg, t2, t1); |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2732 | } else { |
| 2733 | MultiPush(t1.bit() | t2.bit() | cp.bit() | fp.bit()); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2734 | } |
| 2735 | |
| 2736 | // Link the current handler as the next handler. |
| 2737 | li(t2, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 2738 | lw(t1, MemOperand(t2)); |
| 2739 | push(t1); |
| 2740 | // Set this new handler as the current one. |
| 2741 | sw(sp, MemOperand(t2)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2742 | } |
| 2743 | |
| 2744 | |
| 2745 | void MacroAssembler::PopTryHandler() { |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2746 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2747 | pop(a1); |
| 2748 | Addu(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2749 | li(at, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2750 | sw(a1, MemOperand(at)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 2751 | } |
| 2752 | |
| 2753 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2754 | void MacroAssembler::JumpToHandlerEntry() { |
| 2755 | // Compute the handler entry address and jump to it. The handler table is |
| 2756 | // a fixed array of (smi-tagged) code offsets. |
| 2757 | // v0 = exception, a1 = code object, a2 = state. |
| 2758 | lw(a3, FieldMemOperand(a1, Code::kHandlerTableOffset)); // Handler table. |
| 2759 | Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 2760 | srl(a2, a2, StackHandler::kKindWidth); // Handler index. |
| 2761 | sll(a2, a2, kPointerSizeLog2); |
| 2762 | Addu(a2, a3, a2); |
| 2763 | lw(a2, MemOperand(a2)); // Smi-tagged offset. |
| 2764 | Addu(a1, a1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start. |
| 2765 | sra(t9, a2, kSmiTagSize); |
| 2766 | Addu(t9, t9, a1); |
| 2767 | Jump(t9); // Jump. |
| 2768 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2769 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2770 | |
| 2771 | void MacroAssembler::Throw(Register value) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2772 | // Adjust this code if not the case. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2773 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2774 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 2775 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2776 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2777 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2778 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2779 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2780 | // The exception is expected in v0. |
| 2781 | Move(v0, value); |
| 2782 | |
| 2783 | // Drop the stack pointer to the top of the top handler. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 2784 | li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2785 | isolate()))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2786 | lw(sp, MemOperand(a3)); |
| 2787 | |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2788 | // Restore the next handler. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2789 | pop(a2); |
| 2790 | sw(a2, MemOperand(a3)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2791 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2792 | // Get the code object (a1) and state (a2). Restore the context and frame |
| 2793 | // pointer. |
| 2794 | MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit()); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2795 | |
| 2796 | // If the handler is a JS frame, restore the context to the frame. |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2797 | // (kind == ENTRY) == (fp == 0) == (cp == 0), so we could test either fp |
| 2798 | // or cp. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2799 | Label done; |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2800 | Branch(&done, eq, cp, Operand(zero_reg)); |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2801 | sw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2802 | bind(&done); |
| 2803 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2804 | JumpToHandlerEntry(); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2805 | } |
| 2806 | |
| 2807 | |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 2808 | void MacroAssembler::ThrowUncatchable(Register value) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2809 | // Adjust this code if not the case. |
danno@chromium.org | b645116 | 2011-08-17 14:33:23 +0000 | [diff] [blame] | 2810 | STATIC_ASSERT(StackHandlerConstants::kSize == 5 * kPointerSize); |
| 2811 | STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2812 | STATIC_ASSERT(StackHandlerConstants::kCodeOffset == 1 * kPointerSize); |
| 2813 | STATIC_ASSERT(StackHandlerConstants::kStateOffset == 2 * kPointerSize); |
| 2814 | STATIC_ASSERT(StackHandlerConstants::kContextOffset == 3 * kPointerSize); |
| 2815 | STATIC_ASSERT(StackHandlerConstants::kFPOffset == 4 * kPointerSize); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2816 | |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2817 | // The exception is expected in v0. |
ulan@chromium.org | 65a89c2 | 2012-02-14 11:46:07 +0000 | [diff] [blame] | 2818 | if (!value.is(v0)) { |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2819 | mov(v0, value); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2820 | } |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2821 | // Drop the stack pointer to the top of the top stack handler. |
| 2822 | li(a3, Operand(ExternalReference(Isolate::kHandlerAddress, isolate()))); |
| 2823 | lw(sp, MemOperand(a3)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2824 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2825 | // Unwind the handlers until the ENTRY handler is found. |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2826 | Label fetch_next, check_kind; |
| 2827 | jmp(&check_kind); |
| 2828 | bind(&fetch_next); |
| 2829 | lw(sp, MemOperand(sp, StackHandlerConstants::kNextOffset)); |
| 2830 | |
| 2831 | bind(&check_kind); |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 2832 | STATIC_ASSERT(StackHandler::JS_ENTRY == 0); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2833 | lw(a2, MemOperand(sp, StackHandlerConstants::kStateOffset)); |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2834 | And(a2, a2, Operand(StackHandler::KindField::kMask)); |
| 2835 | Branch(&fetch_next, ne, a2, Operand(zero_reg)); |
danno@chromium.org | c612e02 | 2011-11-10 11:38:15 +0000 | [diff] [blame] | 2836 | |
| 2837 | // Set the top handler address to next handler past the top ENTRY handler. |
| 2838 | pop(a2); |
| 2839 | sw(a2, MemOperand(a3)); |
| 2840 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2841 | // Get the code object (a1) and state (a2). Clear the context and frame |
| 2842 | // pointer (0 was saved in the handler). |
| 2843 | MultiPop(a1.bit() | a2.bit() | cp.bit() | fp.bit()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2844 | |
mstarzinger@chromium.org | f8c6bd5 | 2011-11-23 12:13:52 +0000 | [diff] [blame] | 2845 | JumpToHandlerEntry(); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2846 | } |
| 2847 | |
| 2848 | |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 2849 | void MacroAssembler::Allocate(int object_size, |
| 2850 | Register result, |
| 2851 | Register scratch1, |
| 2852 | Register scratch2, |
| 2853 | Label* gc_required, |
| 2854 | AllocationFlags flags) { |
machenbach@chromium.org | ef9a2b9 | 2014-01-24 01:05:19 +0000 | [diff] [blame] | 2855 | ASSERT(object_size <= Page::kMaxRegularHeapObjectSize); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2856 | if (!FLAG_inline_new) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2857 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2858 | // Trash the registers to simulate an allocation failure. |
| 2859 | li(result, 0x7091); |
| 2860 | li(scratch1, 0x7191); |
| 2861 | li(scratch2, 0x7291); |
| 2862 | } |
| 2863 | jmp(gc_required); |
| 2864 | return; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2865 | } |
| 2866 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2867 | ASSERT(!result.is(scratch1)); |
| 2868 | ASSERT(!result.is(scratch2)); |
| 2869 | ASSERT(!scratch1.is(scratch2)); |
| 2870 | ASSERT(!scratch1.is(t9)); |
| 2871 | ASSERT(!scratch2.is(t9)); |
| 2872 | ASSERT(!result.is(t9)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2873 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2874 | // Make object size into bytes. |
| 2875 | if ((flags & SIZE_IN_WORDS) != 0) { |
| 2876 | object_size *= kPointerSize; |
| 2877 | } |
| 2878 | ASSERT_EQ(0, object_size & kObjectAlignmentMask); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2879 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2880 | // Check relative positions of allocation top and limit addresses. |
| 2881 | // ARM adds additional checks to make sure the ldm instruction can be |
| 2882 | // used. On MIPS we don't have ldm so we don't need additional checks either. |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 2883 | ExternalReference allocation_top = |
| 2884 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 2885 | ExternalReference allocation_limit = |
| 2886 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
| 2887 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2888 | intptr_t top = |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 2889 | reinterpret_cast<intptr_t>(allocation_top.address()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2890 | intptr_t limit = |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 2891 | reinterpret_cast<intptr_t>(allocation_limit.address()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2892 | ASSERT((limit - top) == kPointerSize); |
| 2893 | |
| 2894 | // Set up allocation top address and object size registers. |
| 2895 | Register topaddr = scratch1; |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 2896 | li(topaddr, Operand(allocation_top)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2897 | |
| 2898 | // This code stores a temporary value in t9. |
| 2899 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| 2900 | // Load allocation top into result and allocation limit into t9. |
| 2901 | lw(result, MemOperand(topaddr)); |
| 2902 | lw(t9, MemOperand(topaddr, kPointerSize)); |
| 2903 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2904 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2905 | // Assert that result actually contains top on entry. t9 is used |
| 2906 | // immediately below so this use of t9 does not cause difference with |
| 2907 | // respect to register content between debug and release mode. |
| 2908 | lw(t9, MemOperand(topaddr)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2909 | Check(eq, kUnexpectedAllocationTop, result, Operand(t9)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2910 | } |
| 2911 | // Load allocation limit into t9. Result already contains allocation top. |
| 2912 | lw(t9, MemOperand(topaddr, limit - top)); |
| 2913 | } |
| 2914 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2915 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 2916 | // Align the next allocation. Storing the filler map without checking top is |
mstarzinger@chromium.org | f6fe118 | 2013-08-19 18:11:56 +0000 | [diff] [blame] | 2917 | // safe in new-space because the limit of the heap is aligned there. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2918 | ASSERT((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| 2919 | ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
| 2920 | And(scratch2, result, Operand(kDoubleAlignmentMask)); |
| 2921 | Label aligned; |
| 2922 | Branch(&aligned, eq, scratch2, Operand(zero_reg)); |
mstarzinger@chromium.org | f6fe118 | 2013-08-19 18:11:56 +0000 | [diff] [blame] | 2923 | if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| 2924 | Branch(gc_required, Ugreater_equal, result, Operand(t9)); |
| 2925 | } |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2926 | li(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 2927 | sw(scratch2, MemOperand(result)); |
| 2928 | Addu(result, result, Operand(kDoubleSize / 2)); |
| 2929 | bind(&aligned); |
| 2930 | } |
| 2931 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2932 | // Calculate new top and bail out if new space is exhausted. Use result |
| 2933 | // to calculate the new top. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2934 | Addu(scratch2, result, Operand(object_size)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2935 | Branch(gc_required, Ugreater, scratch2, Operand(t9)); |
| 2936 | sw(scratch2, MemOperand(topaddr)); |
| 2937 | |
| 2938 | // Tag object if requested. |
| 2939 | if ((flags & TAG_OBJECT) != 0) { |
| 2940 | Addu(result, result, Operand(kHeapObjectTag)); |
| 2941 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 2942 | } |
| 2943 | |
| 2944 | |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2945 | void MacroAssembler::Allocate(Register object_size, |
| 2946 | Register result, |
| 2947 | Register scratch1, |
| 2948 | Register scratch2, |
| 2949 | Label* gc_required, |
| 2950 | AllocationFlags flags) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2951 | if (!FLAG_inline_new) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2952 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2953 | // Trash the registers to simulate an allocation failure. |
| 2954 | li(result, 0x7091); |
| 2955 | li(scratch1, 0x7191); |
| 2956 | li(scratch2, 0x7291); |
| 2957 | } |
| 2958 | jmp(gc_required); |
| 2959 | return; |
| 2960 | } |
| 2961 | |
| 2962 | ASSERT(!result.is(scratch1)); |
| 2963 | ASSERT(!result.is(scratch2)); |
| 2964 | ASSERT(!scratch1.is(scratch2)); |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 2965 | ASSERT(!object_size.is(t9)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2966 | ASSERT(!scratch1.is(t9) && !scratch2.is(t9) && !result.is(t9)); |
| 2967 | |
| 2968 | // Check relative positions of allocation top and limit addresses. |
| 2969 | // ARM adds additional checks to make sure the ldm instruction can be |
| 2970 | // used. On MIPS we don't have ldm so we don't need additional checks either. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2971 | ExternalReference allocation_top = |
| 2972 | AllocationUtils::GetAllocationTopReference(isolate(), flags); |
| 2973 | ExternalReference allocation_limit = |
| 2974 | AllocationUtils::GetAllocationLimitReference(isolate(), flags); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2975 | intptr_t top = |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2976 | reinterpret_cast<intptr_t>(allocation_top.address()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2977 | intptr_t limit = |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2978 | reinterpret_cast<intptr_t>(allocation_limit.address()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2979 | ASSERT((limit - top) == kPointerSize); |
| 2980 | |
| 2981 | // Set up allocation top address and object size registers. |
| 2982 | Register topaddr = scratch1; |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 2983 | li(topaddr, Operand(allocation_top)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2984 | |
| 2985 | // This code stores a temporary value in t9. |
| 2986 | if ((flags & RESULT_CONTAINS_TOP) == 0) { |
| 2987 | // Load allocation top into result and allocation limit into t9. |
| 2988 | lw(result, MemOperand(topaddr)); |
| 2989 | lw(t9, MemOperand(topaddr, kPointerSize)); |
| 2990 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2991 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2992 | // Assert that result actually contains top on entry. t9 is used |
| 2993 | // immediately below so this use of t9 does not cause difference with |
| 2994 | // respect to register content between debug and release mode. |
| 2995 | lw(t9, MemOperand(topaddr)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 2996 | Check(eq, kUnexpectedAllocationTop, result, Operand(t9)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2997 | } |
| 2998 | // Load allocation limit into t9. Result already contains allocation top. |
| 2999 | lw(t9, MemOperand(topaddr, limit - top)); |
| 3000 | } |
| 3001 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3002 | if ((flags & DOUBLE_ALIGNMENT) != 0) { |
| 3003 | // Align the next allocation. Storing the filler map without checking top is |
mstarzinger@chromium.org | f6fe118 | 2013-08-19 18:11:56 +0000 | [diff] [blame] | 3004 | // safe in new-space because the limit of the heap is aligned there. |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3005 | ASSERT((flags & PRETENURE_OLD_POINTER_SPACE) == 0); |
| 3006 | ASSERT(kPointerAlignment * 2 == kDoubleAlignment); |
| 3007 | And(scratch2, result, Operand(kDoubleAlignmentMask)); |
| 3008 | Label aligned; |
| 3009 | Branch(&aligned, eq, scratch2, Operand(zero_reg)); |
mstarzinger@chromium.org | f6fe118 | 2013-08-19 18:11:56 +0000 | [diff] [blame] | 3010 | if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) { |
| 3011 | Branch(gc_required, Ugreater_equal, result, Operand(t9)); |
| 3012 | } |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3013 | li(scratch2, Operand(isolate()->factory()->one_pointer_filler_map())); |
| 3014 | sw(scratch2, MemOperand(result)); |
| 3015 | Addu(result, result, Operand(kDoubleSize / 2)); |
| 3016 | bind(&aligned); |
| 3017 | } |
| 3018 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3019 | // Calculate new top and bail out if new space is exhausted. Use result |
| 3020 | // to calculate the new top. Object size may be in words so a shift is |
| 3021 | // required to get the number of bytes. |
| 3022 | if ((flags & SIZE_IN_WORDS) != 0) { |
| 3023 | sll(scratch2, object_size, kPointerSizeLog2); |
| 3024 | Addu(scratch2, result, scratch2); |
| 3025 | } else { |
| 3026 | Addu(scratch2, result, Operand(object_size)); |
| 3027 | } |
| 3028 | Branch(gc_required, Ugreater, scratch2, Operand(t9)); |
| 3029 | |
| 3030 | // Update allocation top. result temporarily holds the new top. |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3031 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3032 | And(t9, scratch2, Operand(kObjectAlignmentMask)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3033 | Check(eq, kUnalignedAllocationInNewSpace, t9, Operand(zero_reg)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3034 | } |
| 3035 | sw(scratch2, MemOperand(topaddr)); |
| 3036 | |
| 3037 | // Tag object if requested. |
| 3038 | if ((flags & TAG_OBJECT) != 0) { |
| 3039 | Addu(result, result, Operand(kHeapObjectTag)); |
| 3040 | } |
| 3041 | } |
| 3042 | |
| 3043 | |
| 3044 | void MacroAssembler::UndoAllocationInNewSpace(Register object, |
| 3045 | Register scratch) { |
| 3046 | ExternalReference new_space_allocation_top = |
| 3047 | ExternalReference::new_space_allocation_top_address(isolate()); |
| 3048 | |
| 3049 | // Make sure the object has no tag before resetting top. |
| 3050 | And(object, object, Operand(~kHeapObjectTagMask)); |
| 3051 | #ifdef DEBUG |
| 3052 | // Check that the object un-allocated is below the current top. |
| 3053 | li(scratch, Operand(new_space_allocation_top)); |
| 3054 | lw(scratch, MemOperand(scratch)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3055 | Check(less, kUndoAllocationOfNonAllocatedMemory, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3056 | object, Operand(scratch)); |
| 3057 | #endif |
| 3058 | // Write the address of the object to un-allocate as the current top. |
| 3059 | li(scratch, Operand(new_space_allocation_top)); |
| 3060 | sw(object, MemOperand(scratch)); |
| 3061 | } |
| 3062 | |
| 3063 | |
| 3064 | void MacroAssembler::AllocateTwoByteString(Register result, |
| 3065 | Register length, |
| 3066 | Register scratch1, |
| 3067 | Register scratch2, |
| 3068 | Register scratch3, |
| 3069 | Label* gc_required) { |
| 3070 | // Calculate the number of bytes needed for the characters in the string while |
| 3071 | // observing object alignment. |
| 3072 | ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 3073 | sll(scratch1, length, 1); // Length in bytes, not chars. |
| 3074 | addiu(scratch1, scratch1, |
| 3075 | kObjectAlignmentMask + SeqTwoByteString::kHeaderSize); |
| 3076 | And(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
| 3077 | |
| 3078 | // Allocate two-byte string in new space. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 3079 | Allocate(scratch1, |
| 3080 | result, |
| 3081 | scratch2, |
| 3082 | scratch3, |
| 3083 | gc_required, |
| 3084 | TAG_OBJECT); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3085 | |
| 3086 | // Set the map, length and hash field. |
| 3087 | InitializeNewString(result, |
| 3088 | length, |
| 3089 | Heap::kStringMapRootIndex, |
| 3090 | scratch1, |
| 3091 | scratch2); |
| 3092 | } |
| 3093 | |
| 3094 | |
| 3095 | void MacroAssembler::AllocateAsciiString(Register result, |
| 3096 | Register length, |
| 3097 | Register scratch1, |
| 3098 | Register scratch2, |
| 3099 | Register scratch3, |
| 3100 | Label* gc_required) { |
| 3101 | // Calculate the number of bytes needed for the characters in the string |
| 3102 | // while observing object alignment. |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3103 | ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3104 | ASSERT(kCharSize == 1); |
yangguo@chromium.org | fb37721 | 2012-11-16 14:43:43 +0000 | [diff] [blame] | 3105 | addiu(scratch1, length, kObjectAlignmentMask + SeqOneByteString::kHeaderSize); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3106 | And(scratch1, scratch1, Operand(~kObjectAlignmentMask)); |
| 3107 | |
| 3108 | // Allocate ASCII string in new space. |
mstarzinger@chromium.org | f705b50 | 2013-04-04 11:38:09 +0000 | [diff] [blame] | 3109 | Allocate(scratch1, |
| 3110 | result, |
| 3111 | scratch2, |
| 3112 | scratch3, |
| 3113 | gc_required, |
| 3114 | TAG_OBJECT); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3115 | |
| 3116 | // Set the map, length and hash field. |
| 3117 | InitializeNewString(result, |
| 3118 | length, |
| 3119 | Heap::kAsciiStringMapRootIndex, |
| 3120 | scratch1, |
| 3121 | scratch2); |
| 3122 | } |
| 3123 | |
| 3124 | |
| 3125 | void MacroAssembler::AllocateTwoByteConsString(Register result, |
| 3126 | Register length, |
| 3127 | Register scratch1, |
| 3128 | Register scratch2, |
| 3129 | Label* gc_required) { |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 3130 | Allocate(ConsString::kSize, result, scratch1, scratch2, gc_required, |
| 3131 | TAG_OBJECT); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3132 | InitializeNewString(result, |
| 3133 | length, |
| 3134 | Heap::kConsStringMapRootIndex, |
| 3135 | scratch1, |
| 3136 | scratch2); |
| 3137 | } |
| 3138 | |
| 3139 | |
| 3140 | void MacroAssembler::AllocateAsciiConsString(Register result, |
| 3141 | Register length, |
| 3142 | Register scratch1, |
| 3143 | Register scratch2, |
| 3144 | Label* gc_required) { |
ulan@chromium.org | 57ff881 | 2013-05-10 08:16:55 +0000 | [diff] [blame] | 3145 | Label allocate_new_space, install_map; |
| 3146 | AllocationFlags flags = TAG_OBJECT; |
| 3147 | |
| 3148 | ExternalReference high_promotion_mode = ExternalReference:: |
| 3149 | new_space_high_promotion_mode_active_address(isolate()); |
| 3150 | li(scratch1, Operand(high_promotion_mode)); |
| 3151 | lw(scratch1, MemOperand(scratch1, 0)); |
| 3152 | Branch(&allocate_new_space, eq, scratch1, Operand(zero_reg)); |
| 3153 | |
| 3154 | Allocate(ConsString::kSize, |
| 3155 | result, |
| 3156 | scratch1, |
| 3157 | scratch2, |
| 3158 | gc_required, |
| 3159 | static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE)); |
| 3160 | |
| 3161 | jmp(&install_map); |
| 3162 | |
| 3163 | bind(&allocate_new_space); |
| 3164 | Allocate(ConsString::kSize, |
| 3165 | result, |
| 3166 | scratch1, |
| 3167 | scratch2, |
| 3168 | gc_required, |
| 3169 | flags); |
| 3170 | |
| 3171 | bind(&install_map); |
| 3172 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3173 | InitializeNewString(result, |
| 3174 | length, |
| 3175 | Heap::kConsAsciiStringMapRootIndex, |
| 3176 | scratch1, |
| 3177 | scratch2); |
| 3178 | } |
| 3179 | |
| 3180 | |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3181 | void MacroAssembler::AllocateTwoByteSlicedString(Register result, |
| 3182 | Register length, |
| 3183 | Register scratch1, |
| 3184 | Register scratch2, |
| 3185 | Label* gc_required) { |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 3186 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 3187 | TAG_OBJECT); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3188 | |
| 3189 | InitializeNewString(result, |
| 3190 | length, |
| 3191 | Heap::kSlicedStringMapRootIndex, |
| 3192 | scratch1, |
| 3193 | scratch2); |
| 3194 | } |
| 3195 | |
| 3196 | |
| 3197 | void MacroAssembler::AllocateAsciiSlicedString(Register result, |
| 3198 | Register length, |
| 3199 | Register scratch1, |
| 3200 | Register scratch2, |
| 3201 | Label* gc_required) { |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 3202 | Allocate(SlicedString::kSize, result, scratch1, scratch2, gc_required, |
| 3203 | TAG_OBJECT); |
fschneider@chromium.org | 1805e21 | 2011-09-05 10:49:12 +0000 | [diff] [blame] | 3204 | |
| 3205 | InitializeNewString(result, |
| 3206 | length, |
| 3207 | Heap::kSlicedAsciiStringMapRootIndex, |
| 3208 | scratch1, |
| 3209 | scratch2); |
| 3210 | } |
| 3211 | |
| 3212 | |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3213 | void MacroAssembler::JumpIfNotUniqueName(Register reg, |
| 3214 | Label* not_unique_name) { |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 3215 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 3216 | Label succeed; |
| 3217 | And(at, reg, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 3218 | Branch(&succeed, eq, at, Operand(zero_reg)); |
| 3219 | Branch(not_unique_name, ne, reg, Operand(SYMBOL_TYPE)); |
| 3220 | |
| 3221 | bind(&succeed); |
mstarzinger@chromium.org | 1510d58 | 2013-06-28 14:00:48 +0000 | [diff] [blame] | 3222 | } |
| 3223 | |
| 3224 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3225 | // Allocates a heap number or jumps to the label if the young space is full and |
| 3226 | // a scavenge is needed. |
| 3227 | void MacroAssembler::AllocateHeapNumber(Register result, |
| 3228 | Register scratch1, |
| 3229 | Register scratch2, |
| 3230 | Register heap_number_map, |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3231 | Label* need_gc, |
| 3232 | TaggingMode tagging_mode) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3233 | // Allocate an object in the heap for the heap number and tag it as a heap |
| 3234 | // object. |
jkummerow@chromium.org | 4c54a2a | 2013-03-19 17:51:30 +0000 | [diff] [blame] | 3235 | Allocate(HeapNumber::kSize, result, scratch1, scratch2, need_gc, |
| 3236 | tagging_mode == TAG_RESULT ? TAG_OBJECT : NO_ALLOCATION_FLAGS); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3237 | |
| 3238 | // Store heap number map in the allocated object. |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 3239 | AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3240 | if (tagging_mode == TAG_RESULT) { |
| 3241 | sw(heap_number_map, FieldMemOperand(result, HeapObject::kMapOffset)); |
| 3242 | } else { |
| 3243 | sw(heap_number_map, MemOperand(result, HeapObject::kMapOffset)); |
| 3244 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3245 | } |
| 3246 | |
| 3247 | |
| 3248 | void MacroAssembler::AllocateHeapNumberWithValue(Register result, |
| 3249 | FPURegister value, |
| 3250 | Register scratch1, |
| 3251 | Register scratch2, |
| 3252 | Label* gc_required) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 3253 | LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| 3254 | AllocateHeapNumber(result, scratch1, scratch2, t8, gc_required); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3255 | sdc1(value, FieldMemOperand(result, HeapNumber::kValueOffset)); |
| 3256 | } |
| 3257 | |
| 3258 | |
| 3259 | // Copies a fixed number of fields of heap objects from src to dst. |
| 3260 | void MacroAssembler::CopyFields(Register dst, |
| 3261 | Register src, |
| 3262 | RegList temps, |
| 3263 | int field_count) { |
| 3264 | ASSERT((temps & dst.bit()) == 0); |
| 3265 | ASSERT((temps & src.bit()) == 0); |
| 3266 | // Primitive implementation using only one temporary register. |
| 3267 | |
| 3268 | Register tmp = no_reg; |
| 3269 | // Find a temp register in temps list. |
| 3270 | for (int i = 0; i < kNumRegisters; i++) { |
| 3271 | if ((temps & (1 << i)) != 0) { |
| 3272 | tmp.code_ = i; |
| 3273 | break; |
| 3274 | } |
| 3275 | } |
| 3276 | ASSERT(!tmp.is(no_reg)); |
| 3277 | |
| 3278 | for (int i = 0; i < field_count; i++) { |
| 3279 | lw(tmp, FieldMemOperand(src, i * kPointerSize)); |
| 3280 | sw(tmp, FieldMemOperand(dst, i * kPointerSize)); |
| 3281 | } |
| 3282 | } |
| 3283 | |
| 3284 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3285 | void MacroAssembler::CopyBytes(Register src, |
| 3286 | Register dst, |
| 3287 | Register length, |
| 3288 | Register scratch) { |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3289 | Label align_loop_1, word_loop, byte_loop, byte_loop_1, done; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3290 | |
| 3291 | // Align src before copying in word size chunks. |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3292 | Branch(&byte_loop, le, length, Operand(kPointerSize)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3293 | bind(&align_loop_1); |
| 3294 | And(scratch, src, kPointerSize - 1); |
| 3295 | Branch(&word_loop, eq, scratch, Operand(zero_reg)); |
| 3296 | lbu(scratch, MemOperand(src)); |
| 3297 | Addu(src, src, 1); |
| 3298 | sb(scratch, MemOperand(dst)); |
| 3299 | Addu(dst, dst, 1); |
| 3300 | Subu(length, length, Operand(1)); |
machenbach@chromium.org | 3d079fe | 2013-09-25 08:19:55 +0000 | [diff] [blame] | 3301 | Branch(&align_loop_1, ne, length, Operand(zero_reg)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3302 | |
| 3303 | // Copy bytes in word size chunks. |
| 3304 | bind(&word_loop); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3305 | if (emit_debug_code()) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3306 | And(scratch, src, kPointerSize - 1); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3307 | Assert(eq, kExpectingAlignmentForCopyBytes, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3308 | scratch, Operand(zero_reg)); |
| 3309 | } |
| 3310 | Branch(&byte_loop, lt, length, Operand(kPointerSize)); |
| 3311 | lw(scratch, MemOperand(src)); |
| 3312 | Addu(src, src, kPointerSize); |
| 3313 | |
| 3314 | // TODO(kalmard) check if this can be optimized to use sw in most cases. |
| 3315 | // Can't use unaligned access - copy byte by byte. |
| 3316 | sb(scratch, MemOperand(dst, 0)); |
| 3317 | srl(scratch, scratch, 8); |
| 3318 | sb(scratch, MemOperand(dst, 1)); |
| 3319 | srl(scratch, scratch, 8); |
| 3320 | sb(scratch, MemOperand(dst, 2)); |
| 3321 | srl(scratch, scratch, 8); |
| 3322 | sb(scratch, MemOperand(dst, 3)); |
| 3323 | Addu(dst, dst, 4); |
| 3324 | |
| 3325 | Subu(length, length, Operand(kPointerSize)); |
| 3326 | Branch(&word_loop); |
| 3327 | |
| 3328 | // Copy the last bytes if any left. |
| 3329 | bind(&byte_loop); |
| 3330 | Branch(&done, eq, length, Operand(zero_reg)); |
| 3331 | bind(&byte_loop_1); |
| 3332 | lbu(scratch, MemOperand(src)); |
| 3333 | Addu(src, src, 1); |
| 3334 | sb(scratch, MemOperand(dst)); |
| 3335 | Addu(dst, dst, 1); |
| 3336 | Subu(length, length, Operand(1)); |
| 3337 | Branch(&byte_loop_1, ne, length, Operand(zero_reg)); |
| 3338 | bind(&done); |
| 3339 | } |
| 3340 | |
| 3341 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3342 | void MacroAssembler::InitializeFieldsWithFiller(Register start_offset, |
| 3343 | Register end_offset, |
| 3344 | Register filler) { |
| 3345 | Label loop, entry; |
| 3346 | Branch(&entry); |
| 3347 | bind(&loop); |
| 3348 | sw(filler, MemOperand(start_offset)); |
| 3349 | Addu(start_offset, start_offset, kPointerSize); |
| 3350 | bind(&entry); |
| 3351 | Branch(&loop, lt, start_offset, Operand(end_offset)); |
| 3352 | } |
| 3353 | |
| 3354 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 3355 | void MacroAssembler::CheckFastElements(Register map, |
| 3356 | Register scratch, |
| 3357 | Label* fail) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3358 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 3359 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 3360 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 3361 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3362 | lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3363 | Branch(fail, hi, scratch, |
| 3364 | Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 3365 | } |
| 3366 | |
| 3367 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3368 | void MacroAssembler::CheckFastObjectElements(Register map, |
| 3369 | Register scratch, |
| 3370 | Label* fail) { |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3371 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 3372 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 3373 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 3374 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3375 | lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| 3376 | Branch(fail, ls, scratch, |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3377 | Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3378 | Branch(fail, hi, scratch, |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3379 | Operand(Map::kMaximumBitField2FastHoleyElementValue)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3380 | } |
| 3381 | |
| 3382 | |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3383 | void MacroAssembler::CheckFastSmiElements(Register map, |
| 3384 | Register scratch, |
| 3385 | Label* fail) { |
| 3386 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 3387 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3388 | lbu(scratch, FieldMemOperand(map, Map::kBitField2Offset)); |
| 3389 | Branch(fail, hi, scratch, |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 3390 | Operand(Map::kMaximumBitField2FastHoleySmiElementValue)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3391 | } |
| 3392 | |
| 3393 | |
| 3394 | void MacroAssembler::StoreNumberToDoubleElements(Register value_reg, |
| 3395 | Register key_reg, |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3396 | Register elements_reg, |
| 3397 | Register scratch1, |
| 3398 | Register scratch2, |
| 3399 | Register scratch3, |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3400 | Label* fail, |
| 3401 | int elements_offset) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3402 | Label smi_value, maybe_nan, have_double_value, is_nan, done; |
| 3403 | Register mantissa_reg = scratch2; |
| 3404 | Register exponent_reg = scratch3; |
| 3405 | |
| 3406 | // Handle smi values specially. |
| 3407 | JumpIfSmi(value_reg, &smi_value); |
| 3408 | |
| 3409 | // Ensure that the object is a heap number |
| 3410 | CheckMap(value_reg, |
| 3411 | scratch1, |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 3412 | Heap::kHeapNumberMapRootIndex, |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3413 | fail, |
| 3414 | DONT_DO_SMI_CHECK); |
| 3415 | |
| 3416 | // Check for nan: all NaN values have a value greater (signed) than 0x7ff00000 |
| 3417 | // in the exponent. |
| 3418 | li(scratch1, Operand(kNaNOrInfinityLowerBoundUpper32)); |
| 3419 | lw(exponent_reg, FieldMemOperand(value_reg, HeapNumber::kExponentOffset)); |
| 3420 | Branch(&maybe_nan, ge, exponent_reg, Operand(scratch1)); |
| 3421 | |
| 3422 | lw(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset)); |
| 3423 | |
| 3424 | bind(&have_double_value); |
| 3425 | sll(scratch1, key_reg, kDoubleSizeLog2 - kSmiTagSize); |
| 3426 | Addu(scratch1, scratch1, elements_reg); |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3427 | sw(mantissa_reg, FieldMemOperand( |
| 3428 | scratch1, FixedDoubleArray::kHeaderSize - elements_offset)); |
| 3429 | uint32_t offset = FixedDoubleArray::kHeaderSize - elements_offset + |
| 3430 | sizeof(kHoleNanLower32); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3431 | sw(exponent_reg, FieldMemOperand(scratch1, offset)); |
| 3432 | jmp(&done); |
| 3433 | |
| 3434 | bind(&maybe_nan); |
| 3435 | // Could be NaN or Infinity. If fraction is not zero, it's NaN, otherwise |
| 3436 | // it's an Infinity, and the non-NaN code path applies. |
| 3437 | Branch(&is_nan, gt, exponent_reg, Operand(scratch1)); |
| 3438 | lw(mantissa_reg, FieldMemOperand(value_reg, HeapNumber::kMantissaOffset)); |
| 3439 | Branch(&have_double_value, eq, mantissa_reg, Operand(zero_reg)); |
| 3440 | bind(&is_nan); |
| 3441 | // Load canonical NaN for storing into the double array. |
bmeurer@chromium.org | 25530ce | 2014-02-07 09:11:16 +0000 | [diff] [blame] | 3442 | LoadRoot(at, Heap::kNanValueRootIndex); |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 3443 | lw(mantissa_reg, FieldMemOperand(at, HeapNumber::kMantissaOffset)); |
| 3444 | lw(exponent_reg, FieldMemOperand(at, HeapNumber::kExponentOffset)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3445 | jmp(&have_double_value); |
| 3446 | |
| 3447 | bind(&smi_value); |
| 3448 | Addu(scratch1, elements_reg, |
ulan@chromium.org | 8e8d882 | 2012-11-23 14:36:46 +0000 | [diff] [blame] | 3449 | Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag - |
| 3450 | elements_offset)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3451 | sll(scratch2, key_reg, kDoubleSizeLog2 - kSmiTagSize); |
| 3452 | Addu(scratch1, scratch1, scratch2); |
| 3453 | // scratch1 is now effective address of the double element |
| 3454 | |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 3455 | Register untagged_value = elements_reg; |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3456 | SmiUntag(untagged_value, value_reg); |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 3457 | mtc1(untagged_value, f2); |
| 3458 | cvt_d_w(f0, f2); |
| 3459 | sdc1(f0, MemOperand(scratch1, 0)); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 3460 | bind(&done); |
| 3461 | } |
| 3462 | |
| 3463 | |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3464 | void MacroAssembler::CompareMapAndBranch(Register obj, |
| 3465 | Register scratch, |
| 3466 | Handle<Map> map, |
| 3467 | Label* early_success, |
| 3468 | Condition cond, |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3469 | Label* branch_to) { |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3470 | lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3471 | CompareMapAndBranch(scratch, map, early_success, cond, branch_to); |
mmassi@chromium.org | 7028c05 | 2012-06-13 11:51:58 +0000 | [diff] [blame] | 3472 | } |
| 3473 | |
| 3474 | |
| 3475 | void MacroAssembler::CompareMapAndBranch(Register obj_map, |
| 3476 | Handle<Map> map, |
| 3477 | Label* early_success, |
| 3478 | Condition cond, |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3479 | Label* branch_to) { |
| 3480 | Branch(branch_to, cond, obj_map, Operand(map)); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3481 | } |
| 3482 | |
| 3483 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3484 | void MacroAssembler::CheckMap(Register obj, |
| 3485 | Register scratch, |
| 3486 | Handle<Map> map, |
| 3487 | Label* fail, |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3488 | SmiCheckType smi_check_type) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3489 | if (smi_check_type == DO_SMI_CHECK) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3490 | JumpIfSmi(obj, fail); |
| 3491 | } |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3492 | Label success; |
svenpanne@chromium.org | a53e8e0 | 2013-05-24 12:35:50 +0000 | [diff] [blame] | 3493 | CompareMapAndBranch(obj, scratch, map, &success, ne, fail); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3494 | bind(&success); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3495 | } |
| 3496 | |
| 3497 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3498 | void MacroAssembler::DispatchMap(Register obj, |
| 3499 | Register scratch, |
| 3500 | Handle<Map> map, |
| 3501 | Handle<Code> success, |
| 3502 | SmiCheckType smi_check_type) { |
| 3503 | Label fail; |
| 3504 | if (smi_check_type == DO_SMI_CHECK) { |
| 3505 | JumpIfSmi(obj, &fail); |
| 3506 | } |
| 3507 | lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 3508 | Jump(success, RelocInfo::CODE_TARGET, eq, scratch, Operand(map)); |
| 3509 | bind(&fail); |
| 3510 | } |
| 3511 | |
| 3512 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3513 | void MacroAssembler::CheckMap(Register obj, |
| 3514 | Register scratch, |
| 3515 | Heap::RootListIndex index, |
| 3516 | Label* fail, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3517 | SmiCheckType smi_check_type) { |
| 3518 | if (smi_check_type == DO_SMI_CHECK) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3519 | JumpIfSmi(obj, fail); |
| 3520 | } |
| 3521 | lw(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); |
| 3522 | LoadRoot(at, index); |
| 3523 | Branch(fail, ne, scratch, Operand(at)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3524 | } |
| 3525 | |
| 3526 | |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3527 | void MacroAssembler::MovFromFloatResult(DoubleRegister dst) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3528 | if (IsMipsSoftFloatABI) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3529 | Move(dst, v0, v1); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3530 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3531 | Move(dst, f0); // Reg f0 is o32 ABI FP return value. |
| 3532 | } |
| 3533 | } |
| 3534 | |
| 3535 | |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3536 | void MacroAssembler::MovFromFloatParameter(DoubleRegister dst) { |
machenbach@chromium.org | 0345396 | 2014-01-10 14:16:31 +0000 | [diff] [blame] | 3537 | if (IsMipsSoftFloatABI) { |
| 3538 | Move(dst, a0, a1); |
| 3539 | } else { |
| 3540 | Move(dst, f12); // Reg f12 is o32 ABI FP first argument value. |
| 3541 | } |
| 3542 | } |
| 3543 | |
| 3544 | |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3545 | void MacroAssembler::MovToFloatParameter(DoubleRegister src) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3546 | if (!IsMipsSoftFloatABI) { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3547 | Move(f12, src); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3548 | } else { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3549 | Move(a0, a1, src); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3550 | } |
| 3551 | } |
| 3552 | |
| 3553 | |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3554 | void MacroAssembler::MovToFloatResult(DoubleRegister src) { |
machenbach@chromium.org | 0345396 | 2014-01-10 14:16:31 +0000 | [diff] [blame] | 3555 | if (!IsMipsSoftFloatABI) { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3556 | Move(f0, src); |
machenbach@chromium.org | 0345396 | 2014-01-10 14:16:31 +0000 | [diff] [blame] | 3557 | } else { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3558 | Move(v0, v1, src); |
machenbach@chromium.org | 0345396 | 2014-01-10 14:16:31 +0000 | [diff] [blame] | 3559 | } |
| 3560 | } |
| 3561 | |
| 3562 | |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3563 | void MacroAssembler::MovToFloatParameters(DoubleRegister src1, |
| 3564 | DoubleRegister src2) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3565 | if (!IsMipsSoftFloatABI) { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3566 | if (src2.is(f12)) { |
| 3567 | ASSERT(!src1.is(f14)); |
| 3568 | Move(f14, src2); |
| 3569 | Move(f12, src1); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3570 | } else { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3571 | Move(f12, src1); |
| 3572 | Move(f14, src2); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3573 | } |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3574 | } else { |
machenbach@chromium.org | 4ddd2f1 | 2014-01-14 08:13:44 +0000 | [diff] [blame] | 3575 | Move(a0, a1, src1); |
| 3576 | Move(a2, a3, src2); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3577 | } |
| 3578 | } |
| 3579 | |
| 3580 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3581 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3582 | // JavaScript invokes. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3583 | |
| 3584 | void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 3585 | const ParameterCount& actual, |
| 3586 | Handle<Code> code_constant, |
| 3587 | Register code_reg, |
| 3588 | Label* done, |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3589 | bool* definitely_mismatches, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3590 | InvokeFlag flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3591 | const CallWrapper& call_wrapper) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3592 | bool definitely_matches = false; |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3593 | *definitely_mismatches = false; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3594 | Label regular_invoke; |
| 3595 | |
| 3596 | // Check whether the expected and actual arguments count match. If not, |
| 3597 | // setup registers according to contract with ArgumentsAdaptorTrampoline: |
| 3598 | // a0: actual arguments count |
| 3599 | // a1: function (passed through to callee) |
| 3600 | // a2: expected arguments count |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3601 | |
| 3602 | // The code below is made a lot easier because the calling code already sets |
| 3603 | // up actual and expected registers according to the contract if values are |
| 3604 | // passed in registers. |
| 3605 | ASSERT(actual.is_immediate() || actual.reg().is(a0)); |
| 3606 | ASSERT(expected.is_immediate() || expected.reg().is(a2)); |
| 3607 | ASSERT((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(a3)); |
| 3608 | |
| 3609 | if (expected.is_immediate()) { |
| 3610 | ASSERT(actual.is_immediate()); |
| 3611 | if (expected.immediate() == actual.immediate()) { |
| 3612 | definitely_matches = true; |
| 3613 | } else { |
| 3614 | li(a0, Operand(actual.immediate())); |
| 3615 | const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; |
| 3616 | if (expected.immediate() == sentinel) { |
| 3617 | // Don't worry about adapting arguments for builtins that |
| 3618 | // don't want that done. Skip adaption code by making it look |
| 3619 | // like we have a match between expected and actual number of |
| 3620 | // arguments. |
| 3621 | definitely_matches = true; |
| 3622 | } else { |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3623 | *definitely_mismatches = true; |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3624 | li(a2, Operand(expected.immediate())); |
| 3625 | } |
| 3626 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3627 | } else if (actual.is_immediate()) { |
| 3628 | Branch(®ular_invoke, eq, expected.reg(), Operand(actual.immediate())); |
| 3629 | li(a0, Operand(actual.immediate())); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3630 | } else { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3631 | Branch(®ular_invoke, eq, expected.reg(), Operand(actual.reg())); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3632 | } |
| 3633 | |
| 3634 | if (!definitely_matches) { |
| 3635 | if (!code_constant.is_null()) { |
| 3636 | li(a3, Operand(code_constant)); |
| 3637 | addiu(a3, a3, Code::kHeaderSize - kHeapObjectTag); |
| 3638 | } |
| 3639 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3640 | Handle<Code> adaptor = |
| 3641 | isolate()->builtins()->ArgumentsAdaptorTrampoline(); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3642 | if (flag == CALL_FUNCTION) { |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3643 | call_wrapper.BeforeCall(CallSize(adaptor)); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 3644 | Call(adaptor); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 3645 | call_wrapper.AfterCall(); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3646 | if (!*definitely_mismatches) { |
| 3647 | Branch(done); |
| 3648 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3649 | } else { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3650 | Jump(adaptor, RelocInfo::CODE_TARGET); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3651 | } |
| 3652 | bind(®ular_invoke); |
| 3653 | } |
| 3654 | } |
| 3655 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3656 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3657 | void MacroAssembler::InvokeCode(Register code, |
| 3658 | const ParameterCount& expected, |
| 3659 | const ParameterCount& actual, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3660 | InvokeFlag flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3661 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3662 | // You can't call a function without a valid frame. |
| 3663 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3664 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3665 | Label done; |
| 3666 | |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3667 | bool definitely_mismatches = false; |
| 3668 | InvokePrologue(expected, actual, Handle<Code>::null(), code, |
| 3669 | &done, &definitely_mismatches, flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3670 | call_wrapper); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3671 | if (!definitely_mismatches) { |
| 3672 | if (flag == CALL_FUNCTION) { |
| 3673 | call_wrapper.BeforeCall(CallSize(code)); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3674 | Call(code); |
| 3675 | call_wrapper.AfterCall(); |
| 3676 | } else { |
| 3677 | ASSERT(flag == JUMP_FUNCTION); |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 3678 | Jump(code); |
| 3679 | } |
| 3680 | // Continue here if InvokePrologue does handle the invocation due to |
| 3681 | // mismatched parameter counts. |
| 3682 | bind(&done); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3683 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3684 | } |
| 3685 | |
| 3686 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3687 | void MacroAssembler::InvokeFunction(Register function, |
| 3688 | const ParameterCount& actual, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3689 | InvokeFlag flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3690 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3691 | // You can't call a function without a valid frame. |
| 3692 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3693 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3694 | // Contract with called JS functions requires that function is passed in a1. |
| 3695 | ASSERT(function.is(a1)); |
| 3696 | Register expected_reg = a2; |
| 3697 | Register code_reg = a3; |
| 3698 | |
| 3699 | lw(code_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset)); |
| 3700 | lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset)); |
| 3701 | lw(expected_reg, |
| 3702 | FieldMemOperand(code_reg, |
| 3703 | SharedFunctionInfo::kFormalParameterCountOffset)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3704 | sra(expected_reg, expected_reg, kSmiTagSize); |
| 3705 | lw(code_reg, FieldMemOperand(a1, JSFunction::kCodeEntryOffset)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3706 | |
| 3707 | ParameterCount expected(expected_reg); |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3708 | InvokeCode(code_reg, expected, actual, flag, call_wrapper); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3709 | } |
| 3710 | |
| 3711 | |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 3712 | void MacroAssembler::InvokeFunction(Register function, |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 3713 | const ParameterCount& expected, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3714 | const ParameterCount& actual, |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 3715 | InvokeFlag flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3716 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3717 | // You can't call a function without a valid frame. |
| 3718 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 3719 | |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 3720 | // Contract with called JS functions requires that function is passed in a1. |
| 3721 | ASSERT(function.is(a1)); |
| 3722 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3723 | // Get the function and setup the context. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3724 | lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset)); |
| 3725 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 3726 | // We call indirectly through the code field in the function to |
| 3727 | // allow recompilation to take effect without changing any of the |
| 3728 | // call sites. |
| 3729 | lw(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset)); |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3730 | InvokeCode(a3, expected, actual, flag, call_wrapper); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3731 | } |
| 3732 | |
| 3733 | |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 3734 | void MacroAssembler::InvokeFunction(Handle<JSFunction> function, |
| 3735 | const ParameterCount& expected, |
| 3736 | const ParameterCount& actual, |
| 3737 | InvokeFlag flag, |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3738 | const CallWrapper& call_wrapper) { |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 3739 | li(a1, function); |
machenbach@chromium.org | e31286d | 2014-01-15 10:29:52 +0000 | [diff] [blame] | 3740 | InvokeFunction(a1, expected, actual, flag, call_wrapper); |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 3741 | } |
| 3742 | |
| 3743 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3744 | void MacroAssembler::IsObjectJSObjectType(Register heap_object, |
| 3745 | Register map, |
| 3746 | Register scratch, |
| 3747 | Label* fail) { |
| 3748 | lw(map, FieldMemOperand(heap_object, HeapObject::kMapOffset)); |
| 3749 | IsInstanceJSObjectType(map, scratch, fail); |
| 3750 | } |
| 3751 | |
| 3752 | |
| 3753 | void MacroAssembler::IsInstanceJSObjectType(Register map, |
| 3754 | Register scratch, |
| 3755 | Label* fail) { |
| 3756 | lbu(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 3757 | Branch(fail, lt, scratch, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
| 3758 | Branch(fail, gt, scratch, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3759 | } |
| 3760 | |
| 3761 | |
| 3762 | void MacroAssembler::IsObjectJSStringType(Register object, |
| 3763 | Register scratch, |
| 3764 | Label* fail) { |
| 3765 | ASSERT(kNotStringTag != 0); |
| 3766 | |
| 3767 | lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3768 | lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 3769 | And(scratch, scratch, Operand(kIsNotStringMask)); |
| 3770 | Branch(fail, ne, scratch, Operand(zero_reg)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3771 | } |
| 3772 | |
| 3773 | |
svenpanne@chromium.org | 9faefa4 | 2013-03-08 13:13:16 +0000 | [diff] [blame] | 3774 | void MacroAssembler::IsObjectNameType(Register object, |
| 3775 | Register scratch, |
| 3776 | Label* fail) { |
| 3777 | lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3778 | lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 3779 | Branch(fail, hi, scratch, Operand(LAST_NAME_TYPE)); |
| 3780 | } |
| 3781 | |
| 3782 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3783 | // --------------------------------------------------------------------------- |
| 3784 | // Support functions. |
| 3785 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3786 | |
| 3787 | void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 3788 | Register result, |
| 3789 | Register scratch, |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 3790 | Label* miss, |
| 3791 | bool miss_on_bound_function) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3792 | // Check that the receiver isn't a smi. |
| 3793 | JumpIfSmi(function, miss); |
| 3794 | |
| 3795 | // Check that the function really is a function. Load map into result reg. |
| 3796 | GetObjectType(function, result, scratch); |
| 3797 | Branch(miss, ne, scratch, Operand(JS_FUNCTION_TYPE)); |
| 3798 | |
erik.corry@gmail.com | 394dbcf | 2011-10-27 07:38:48 +0000 | [diff] [blame] | 3799 | if (miss_on_bound_function) { |
| 3800 | lw(scratch, |
| 3801 | FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset)); |
| 3802 | lw(scratch, |
| 3803 | FieldMemOperand(scratch, SharedFunctionInfo::kCompilerHintsOffset)); |
| 3804 | And(scratch, scratch, |
| 3805 | Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction))); |
| 3806 | Branch(miss, ne, scratch, Operand(zero_reg)); |
| 3807 | } |
| 3808 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3809 | // Make sure that the function has an instance prototype. |
| 3810 | Label non_instance; |
| 3811 | lbu(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| 3812 | And(scratch, scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| 3813 | Branch(&non_instance, ne, scratch, Operand(zero_reg)); |
| 3814 | |
| 3815 | // Get the prototype or initial map from the function. |
| 3816 | lw(result, |
| 3817 | FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 3818 | |
| 3819 | // If the prototype or initial map is the hole, don't return it and |
| 3820 | // simply miss the cache instead. This will allow us to allocate a |
| 3821 | // prototype object on-demand in the runtime system. |
| 3822 | LoadRoot(t8, Heap::kTheHoleValueRootIndex); |
| 3823 | Branch(miss, eq, result, Operand(t8)); |
| 3824 | |
| 3825 | // If the function does not have an initial map, we're done. |
| 3826 | Label done; |
| 3827 | GetObjectType(result, scratch, scratch); |
| 3828 | Branch(&done, ne, scratch, Operand(MAP_TYPE)); |
| 3829 | |
| 3830 | // Get the prototype from the initial map. |
| 3831 | lw(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
| 3832 | jmp(&done); |
| 3833 | |
| 3834 | // Non-instance prototype: Fetch prototype from constructor field |
| 3835 | // in initial map. |
| 3836 | bind(&non_instance); |
| 3837 | lw(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| 3838 | |
| 3839 | // All done. |
| 3840 | bind(&done); |
| 3841 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3842 | |
| 3843 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3844 | void MacroAssembler::GetObjectType(Register object, |
| 3845 | Register map, |
| 3846 | Register type_reg) { |
| 3847 | lw(map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 3848 | lbu(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 3849 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3850 | |
| 3851 | |
| 3852 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3853 | // Runtime calls. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 3854 | |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 3855 | void MacroAssembler::CallStub(CodeStub* stub, |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 3856 | TypeFeedbackId ast_id, |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 3857 | Condition cond, |
| 3858 | Register r1, |
| 3859 | const Operand& r2, |
| 3860 | BranchDelaySlot bd) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 3861 | ASSERT(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 3862 | Call(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, ast_id, |
mstarzinger@chromium.org | 471f2f1 | 2012-08-10 14:46:33 +0000 | [diff] [blame] | 3863 | cond, r1, r2, bd); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3864 | } |
| 3865 | |
| 3866 | |
ulan@chromium.org | 0f13e74 | 2014-01-03 15:51:11 +0000 | [diff] [blame] | 3867 | void MacroAssembler::TailCallStub(CodeStub* stub, |
| 3868 | Condition cond, |
| 3869 | Register r1, |
| 3870 | const Operand& r2, |
| 3871 | BranchDelaySlot bd) { |
| 3872 | Jump(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, cond, r1, r2, bd); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 3873 | } |
| 3874 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 3875 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3876 | static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| 3877 | return ref0.address() - ref1.address(); |
| 3878 | } |
| 3879 | |
| 3880 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3881 | void MacroAssembler::CallApiFunctionAndReturn( |
machenbach@chromium.org | e014e5b | 2014-01-28 07:51:38 +0000 | [diff] [blame] | 3882 | Register function_address, |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3883 | ExternalReference thunk_ref, |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3884 | int stack_space, |
| 3885 | MemOperand return_value_operand, |
| 3886 | MemOperand* context_restore_operand) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3887 | ExternalReference next_address = |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 3888 | ExternalReference::handle_scope_next_address(isolate()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3889 | const int kNextOffset = 0; |
| 3890 | const int kLimitOffset = AddressOffset( |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 3891 | ExternalReference::handle_scope_limit_address(isolate()), |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3892 | next_address); |
| 3893 | const int kLevelOffset = AddressOffset( |
ulan@chromium.org | 09d7ab5 | 2013-02-25 15:50:35 +0000 | [diff] [blame] | 3894 | ExternalReference::handle_scope_level_address(isolate()), |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3895 | next_address); |
| 3896 | |
machenbach@chromium.org | 57a54ac | 2014-01-31 14:01:53 +0000 | [diff] [blame] | 3897 | ASSERT(function_address.is(a1) || function_address.is(a2)); |
machenbach@chromium.org | e014e5b | 2014-01-28 07:51:38 +0000 | [diff] [blame] | 3898 | |
| 3899 | Label profiler_disabled; |
| 3900 | Label end_profiler_check; |
| 3901 | bool* is_profiling_flag = |
| 3902 | isolate()->cpu_profiler()->is_profiling_address(); |
| 3903 | STATIC_ASSERT(sizeof(*is_profiling_flag) == 1); |
| 3904 | li(t9, reinterpret_cast<int32_t>(is_profiling_flag)); |
| 3905 | lb(t9, MemOperand(t9, 0)); |
| 3906 | Branch(&profiler_disabled, eq, t9, Operand(zero_reg)); |
| 3907 | |
| 3908 | // Additional parameter is the address of the actual callback. |
| 3909 | li(t9, Operand(thunk_ref)); |
| 3910 | jmp(&end_profiler_check); |
| 3911 | |
| 3912 | bind(&profiler_disabled); |
| 3913 | mov(t9, function_address); |
| 3914 | bind(&end_profiler_check); |
| 3915 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3916 | // Allocate HandleScope in callee-save registers. |
| 3917 | li(s3, Operand(next_address)); |
| 3918 | lw(s0, MemOperand(s3, kNextOffset)); |
| 3919 | lw(s1, MemOperand(s3, kLimitOffset)); |
| 3920 | lw(s2, MemOperand(s3, kLevelOffset)); |
| 3921 | Addu(s2, s2, Operand(1)); |
| 3922 | sw(s2, MemOperand(s3, kLevelOffset)); |
| 3923 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3924 | if (FLAG_log_timer_events) { |
| 3925 | FrameScope frame(this, StackFrame::MANUAL); |
| 3926 | PushSafepointRegisters(); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3927 | PrepareCallCFunction(1, a0); |
| 3928 | li(a0, Operand(ExternalReference::isolate_address(isolate()))); |
| 3929 | CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3930 | PopSafepointRegisters(); |
| 3931 | } |
| 3932 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3933 | // Native call returns to the DirectCEntry stub which redirects to the |
| 3934 | // return address pushed on stack (could have moved after GC). |
| 3935 | // DirectCEntry stub itself is generated early and never moves. |
| 3936 | DirectCEntryStub stub; |
dslomov@chromium.org | b752d40 | 2013-06-18 11:54:54 +0000 | [diff] [blame] | 3937 | stub.GenerateCall(this, t9); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3938 | |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3939 | if (FLAG_log_timer_events) { |
| 3940 | FrameScope frame(this, StackFrame::MANUAL); |
| 3941 | PushSafepointRegisters(); |
danno@chromium.org | ca29dd8 | 2013-04-26 11:59:48 +0000 | [diff] [blame] | 3942 | PrepareCallCFunction(1, a0); |
| 3943 | li(a0, Operand(ExternalReference::isolate_address(isolate()))); |
| 3944 | CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
svenpanne@chromium.org | 83130cf | 2012-11-30 10:13:25 +0000 | [diff] [blame] | 3945 | PopSafepointRegisters(); |
| 3946 | } |
| 3947 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3948 | Label promote_scheduled_exception; |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3949 | Label exception_handled; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3950 | Label delete_allocated_handles; |
| 3951 | Label leave_exit_frame; |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3952 | Label return_value_loaded; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3953 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3954 | // Load value from ReturnValue. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3955 | lw(v0, return_value_operand); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 3956 | bind(&return_value_loaded); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3957 | |
| 3958 | // No more valid handles (the result handle was the last one). Restore |
| 3959 | // previous handle scope. |
| 3960 | sw(s0, MemOperand(s3, kNextOffset)); |
| 3961 | if (emit_debug_code()) { |
| 3962 | lw(a1, MemOperand(s3, kLevelOffset)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 3963 | Check(eq, kUnexpectedLevelAfterReturnFromApiCall, a1, Operand(s2)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3964 | } |
| 3965 | Subu(s2, s2, Operand(1)); |
| 3966 | sw(s2, MemOperand(s3, kLevelOffset)); |
| 3967 | lw(at, MemOperand(s3, kLimitOffset)); |
| 3968 | Branch(&delete_allocated_handles, ne, s1, Operand(at)); |
| 3969 | |
| 3970 | // Check if the function scheduled an exception. |
| 3971 | bind(&leave_exit_frame); |
| 3972 | LoadRoot(t0, Heap::kTheHoleValueRootIndex); |
| 3973 | li(at, Operand(ExternalReference::scheduled_exception_address(isolate()))); |
| 3974 | lw(t1, MemOperand(at)); |
| 3975 | Branch(&promote_scheduled_exception, ne, t0, Operand(t1)); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3976 | bind(&exception_handled); |
| 3977 | |
| 3978 | bool restore_context = context_restore_operand != NULL; |
| 3979 | if (restore_context) { |
| 3980 | lw(cp, *context_restore_operand); |
| 3981 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3982 | li(s0, Operand(stack_space)); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3983 | LeaveExitFrame(false, s0, !restore_context, EMIT_RETURN); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3984 | |
| 3985 | bind(&promote_scheduled_exception); |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3986 | { |
| 3987 | FrameScope frame(this, StackFrame::INTERNAL); |
| 3988 | CallExternalReference( |
machenbach@chromium.org | 895f00d | 2014-03-27 01:04:43 +0000 | [diff] [blame] | 3989 | ExternalReference(Runtime::kHiddenPromoteScheduledException, isolate()), |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 3990 | 0); |
| 3991 | } |
| 3992 | jmp(&exception_handled); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3993 | |
| 3994 | // HandleScope limit has changed. Delete allocated extensions. |
| 3995 | bind(&delete_allocated_handles); |
| 3996 | sw(s1, MemOperand(s3, kLimitOffset)); |
| 3997 | mov(s0, v0); |
| 3998 | mov(a0, v0); |
| 3999 | PrepareCallCFunction(1, s1); |
ulan@chromium.org | 32d7dba | 2013-04-24 10:59:06 +0000 | [diff] [blame] | 4000 | li(a0, Operand(ExternalReference::isolate_address(isolate()))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4001 | CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate()), |
| 4002 | 1); |
| 4003 | mov(v0, s0); |
| 4004 | jmp(&leave_exit_frame); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4005 | } |
| 4006 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4007 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4008 | bool MacroAssembler::AllowThisStubCall(CodeStub* stub) { |
machenbach@chromium.org | 8a58f64 | 2013-12-02 10:46:30 +0000 | [diff] [blame] | 4009 | return has_frame_ || !stub->SometimesSetsUpAFrame(); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4010 | } |
| 4011 | |
| 4012 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4013 | void MacroAssembler::IllegalOperation(int num_arguments) { |
| 4014 | if (num_arguments > 0) { |
| 4015 | addiu(sp, sp, num_arguments * kPointerSize); |
| 4016 | } |
| 4017 | LoadRoot(v0, Heap::kUndefinedValueRootIndex); |
| 4018 | } |
| 4019 | |
| 4020 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4021 | void MacroAssembler::IndexFromHash(Register hash, |
| 4022 | Register index) { |
| 4023 | // If the hash field contains an array index pick it out. The assert checks |
| 4024 | // that the constants for the maximum number of digits for an array index |
| 4025 | // cached in the hash field and the number of bits reserved for it does not |
| 4026 | // conflict. |
| 4027 | ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) < |
| 4028 | (1 << String::kArrayIndexValueBits)); |
| 4029 | // We want the smi-tagged index in key. kArrayIndexValueMask has zeros in |
| 4030 | // the low kHashShift bits. |
| 4031 | STATIC_ASSERT(kSmiTag == 0); |
| 4032 | Ext(hash, hash, String::kHashShift, String::kArrayIndexValueBits); |
| 4033 | sll(index, hash, kSmiTagSize); |
| 4034 | } |
| 4035 | |
| 4036 | |
| 4037 | void MacroAssembler::ObjectToDoubleFPURegister(Register object, |
| 4038 | FPURegister result, |
| 4039 | Register scratch1, |
| 4040 | Register scratch2, |
| 4041 | Register heap_number_map, |
| 4042 | Label* not_number, |
| 4043 | ObjectToDoubleFlags flags) { |
| 4044 | Label done; |
| 4045 | if ((flags & OBJECT_NOT_SMI) == 0) { |
| 4046 | Label not_smi; |
| 4047 | JumpIfNotSmi(object, ¬_smi); |
| 4048 | // Remove smi tag and convert to double. |
| 4049 | sra(scratch1, object, kSmiTagSize); |
| 4050 | mtc1(scratch1, result); |
| 4051 | cvt_d_w(result, result); |
| 4052 | Branch(&done); |
| 4053 | bind(¬_smi); |
| 4054 | } |
| 4055 | // Check for heap number and load double value from it. |
| 4056 | lw(scratch1, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 4057 | Branch(not_number, ne, scratch1, Operand(heap_number_map)); |
| 4058 | |
| 4059 | if ((flags & AVOID_NANS_AND_INFINITIES) != 0) { |
| 4060 | // If exponent is all ones the number is either a NaN or +/-Infinity. |
| 4061 | Register exponent = scratch1; |
| 4062 | Register mask_reg = scratch2; |
| 4063 | lw(exponent, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 4064 | li(mask_reg, HeapNumber::kExponentMask); |
| 4065 | |
| 4066 | And(exponent, exponent, mask_reg); |
| 4067 | Branch(not_number, eq, exponent, Operand(mask_reg)); |
| 4068 | } |
| 4069 | ldc1(result, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 4070 | bind(&done); |
| 4071 | } |
| 4072 | |
| 4073 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4074 | void MacroAssembler::SmiToDoubleFPURegister(Register smi, |
| 4075 | FPURegister value, |
| 4076 | Register scratch1) { |
| 4077 | sra(scratch1, smi, kSmiTagSize); |
| 4078 | mtc1(scratch1, value); |
| 4079 | cvt_d_w(value, value); |
| 4080 | } |
| 4081 | |
| 4082 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4083 | void MacroAssembler::AdduAndCheckForOverflow(Register dst, |
| 4084 | Register left, |
| 4085 | Register right, |
| 4086 | Register overflow_dst, |
| 4087 | Register scratch) { |
| 4088 | ASSERT(!dst.is(overflow_dst)); |
| 4089 | ASSERT(!dst.is(scratch)); |
| 4090 | ASSERT(!overflow_dst.is(scratch)); |
| 4091 | ASSERT(!overflow_dst.is(left)); |
| 4092 | ASSERT(!overflow_dst.is(right)); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4093 | |
| 4094 | if (left.is(right) && dst.is(left)) { |
| 4095 | ASSERT(!dst.is(t9)); |
| 4096 | ASSERT(!scratch.is(t9)); |
| 4097 | ASSERT(!left.is(t9)); |
| 4098 | ASSERT(!right.is(t9)); |
| 4099 | ASSERT(!overflow_dst.is(t9)); |
| 4100 | mov(t9, right); |
| 4101 | right = t9; |
| 4102 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4103 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4104 | if (dst.is(left)) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 4105 | mov(scratch, left); // Preserve left. |
| 4106 | addu(dst, left, right); // Left is overwritten. |
| 4107 | xor_(scratch, dst, scratch); // Original left. |
| 4108 | xor_(overflow_dst, dst, right); |
| 4109 | and_(overflow_dst, overflow_dst, scratch); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4110 | } else if (dst.is(right)) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 4111 | mov(scratch, right); // Preserve right. |
| 4112 | addu(dst, left, right); // Right is overwritten. |
| 4113 | xor_(scratch, dst, scratch); // Original right. |
| 4114 | xor_(overflow_dst, dst, left); |
| 4115 | and_(overflow_dst, overflow_dst, scratch); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4116 | } else { |
| 4117 | addu(dst, left, right); |
| 4118 | xor_(overflow_dst, dst, left); |
| 4119 | xor_(scratch, dst, right); |
| 4120 | and_(overflow_dst, scratch, overflow_dst); |
| 4121 | } |
| 4122 | } |
| 4123 | |
| 4124 | |
| 4125 | void MacroAssembler::SubuAndCheckForOverflow(Register dst, |
| 4126 | Register left, |
| 4127 | Register right, |
| 4128 | Register overflow_dst, |
| 4129 | Register scratch) { |
| 4130 | ASSERT(!dst.is(overflow_dst)); |
| 4131 | ASSERT(!dst.is(scratch)); |
| 4132 | ASSERT(!overflow_dst.is(scratch)); |
| 4133 | ASSERT(!overflow_dst.is(left)); |
| 4134 | ASSERT(!overflow_dst.is(right)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4135 | ASSERT(!scratch.is(left)); |
| 4136 | ASSERT(!scratch.is(right)); |
| 4137 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4138 | // This happens with some crankshaft code. Since Subu works fine if |
| 4139 | // left == right, let's not make that restriction here. |
| 4140 | if (left.is(right)) { |
| 4141 | mov(dst, zero_reg); |
| 4142 | mov(overflow_dst, zero_reg); |
| 4143 | return; |
| 4144 | } |
| 4145 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4146 | if (dst.is(left)) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 4147 | mov(scratch, left); // Preserve left. |
| 4148 | subu(dst, left, right); // Left is overwritten. |
| 4149 | xor_(overflow_dst, dst, scratch); // scratch is original left. |
| 4150 | xor_(scratch, scratch, right); // scratch is original left. |
| 4151 | and_(overflow_dst, scratch, overflow_dst); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4152 | } else if (dst.is(right)) { |
ager@chromium.org | 04921a8 | 2011-06-27 13:21:41 +0000 | [diff] [blame] | 4153 | mov(scratch, right); // Preserve right. |
| 4154 | subu(dst, left, right); // Right is overwritten. |
| 4155 | xor_(overflow_dst, dst, left); |
| 4156 | xor_(scratch, left, scratch); // Original right. |
| 4157 | and_(overflow_dst, scratch, overflow_dst); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4158 | } else { |
| 4159 | subu(dst, left, right); |
| 4160 | xor_(overflow_dst, dst, left); |
| 4161 | xor_(scratch, left, right); |
| 4162 | and_(overflow_dst, scratch, overflow_dst); |
| 4163 | } |
| 4164 | } |
| 4165 | |
| 4166 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4167 | void MacroAssembler::CallRuntime(const Runtime::Function* f, |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 4168 | int num_arguments, |
| 4169 | SaveFPRegsMode save_doubles) { |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4170 | // All parameters are on the stack. v0 has the return value after call. |
| 4171 | |
| 4172 | // If the expected number of arguments of the runtime function is |
| 4173 | // constant, we check that the actual number of arguments match the |
| 4174 | // expectation. |
| 4175 | if (f->nargs >= 0 && f->nargs != num_arguments) { |
| 4176 | IllegalOperation(num_arguments); |
| 4177 | return; |
| 4178 | } |
| 4179 | |
| 4180 | // TODO(1236192): Most runtime routines don't need the number of |
| 4181 | // arguments passed in because it is constant. At some point we |
| 4182 | // should remove this need and make the runtime routine entry code |
| 4183 | // smarter. |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4184 | PrepareCEntryArgs(num_arguments); |
| 4185 | PrepareCEntryFunction(ExternalReference(f, isolate())); |
jkummerow@chromium.org | fb7a7c4 | 2013-10-02 11:41:02 +0000 | [diff] [blame] | 4186 | CEntryStub stub(1, save_doubles); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4187 | CallStub(&stub); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4188 | } |
| 4189 | |
| 4190 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4191 | void MacroAssembler::CallExternalReference(const ExternalReference& ext, |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4192 | int num_arguments, |
| 4193 | BranchDelaySlot bd) { |
| 4194 | PrepareCEntryArgs(num_arguments); |
| 4195 | PrepareCEntryFunction(ext); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4196 | |
| 4197 | CEntryStub stub(1); |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 4198 | CallStub(&stub, TypeFeedbackId::None(), al, zero_reg, Operand(zero_reg), bd); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4199 | } |
| 4200 | |
| 4201 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4202 | void MacroAssembler::TailCallExternalReference(const ExternalReference& ext, |
| 4203 | int num_arguments, |
| 4204 | int result_size) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4205 | // TODO(1236192): Most runtime routines don't need the number of |
| 4206 | // arguments passed in because it is constant. At some point we |
| 4207 | // should remove this need and make the runtime routine entry code |
| 4208 | // smarter. |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4209 | PrepareCEntryArgs(num_arguments); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4210 | JumpToExternalReference(ext); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4211 | } |
| 4212 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 4213 | |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4214 | void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 4215 | int num_arguments, |
| 4216 | int result_size) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4217 | TailCallExternalReference(ExternalReference(fid, isolate()), |
| 4218 | num_arguments, |
| 4219 | result_size); |
ager@chromium.org | ce5e87b | 2010-03-10 10:24:18 +0000 | [diff] [blame] | 4220 | } |
| 4221 | |
| 4222 | |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4223 | void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin, |
| 4224 | BranchDelaySlot bd) { |
| 4225 | PrepareCEntryFunction(builtin); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4226 | CEntryStub stub(1); |
hpayer@chromium.org | 8432c91 | 2013-02-28 15:55:26 +0000 | [diff] [blame] | 4227 | Jump(stub.GetCode(isolate()), |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4228 | RelocInfo::CODE_TARGET, |
| 4229 | al, |
| 4230 | zero_reg, |
| 4231 | Operand(zero_reg), |
| 4232 | bd); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4233 | } |
| 4234 | |
| 4235 | |
| 4236 | void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 4237 | InvokeFlag flag, |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 4238 | const CallWrapper& call_wrapper) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4239 | // You can't call a builtin without a valid frame. |
| 4240 | ASSERT(flag == JUMP_FUNCTION || has_frame()); |
| 4241 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4242 | GetBuiltinEntry(t9, id); |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 4243 | if (flag == CALL_FUNCTION) { |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 4244 | call_wrapper.BeforeCall(CallSize(t9)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4245 | Call(t9); |
fschneider@chromium.org | fb144a0 | 2011-05-04 12:43:48 +0000 | [diff] [blame] | 4246 | call_wrapper.AfterCall(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4247 | } else { |
sgjesse@chromium.org | 8e8294a | 2011-05-02 14:30:53 +0000 | [diff] [blame] | 4248 | ASSERT(flag == JUMP_FUNCTION); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4249 | Jump(t9); |
| 4250 | } |
| 4251 | } |
| 4252 | |
| 4253 | |
| 4254 | void MacroAssembler::GetBuiltinFunction(Register target, |
| 4255 | Builtins::JavaScript id) { |
| 4256 | // Load the builtins object into target register. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4257 | lw(target, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4258 | lw(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset)); |
| 4259 | // Load the JavaScript builtin function from the builtins object. |
| 4260 | lw(target, FieldMemOperand(target, |
| 4261 | JSBuiltinsObject::OffsetOfFunctionWithId(id))); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4262 | } |
| 4263 | |
| 4264 | |
| 4265 | void MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4266 | ASSERT(!target.is(a1)); |
| 4267 | GetBuiltinFunction(a1, id); |
| 4268 | // Load the code entry point from the builtins object. |
| 4269 | lw(target, FieldMemOperand(a1, JSFunction::kCodeEntryOffset)); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4270 | } |
| 4271 | |
| 4272 | |
| 4273 | void MacroAssembler::SetCounter(StatsCounter* counter, int value, |
| 4274 | Register scratch1, Register scratch2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4275 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 4276 | li(scratch1, Operand(value)); |
| 4277 | li(scratch2, Operand(ExternalReference(counter))); |
| 4278 | sw(scratch1, MemOperand(scratch2)); |
| 4279 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4280 | } |
| 4281 | |
| 4282 | |
| 4283 | void MacroAssembler::IncrementCounter(StatsCounter* counter, int value, |
| 4284 | Register scratch1, Register scratch2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4285 | ASSERT(value > 0); |
| 4286 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 4287 | li(scratch2, Operand(ExternalReference(counter))); |
| 4288 | lw(scratch1, MemOperand(scratch2)); |
| 4289 | Addu(scratch1, scratch1, Operand(value)); |
| 4290 | sw(scratch1, MemOperand(scratch2)); |
| 4291 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4292 | } |
| 4293 | |
| 4294 | |
| 4295 | void MacroAssembler::DecrementCounter(StatsCounter* counter, int value, |
| 4296 | Register scratch1, Register scratch2) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4297 | ASSERT(value > 0); |
| 4298 | if (FLAG_native_code_counters && counter->Enabled()) { |
| 4299 | li(scratch2, Operand(ExternalReference(counter))); |
| 4300 | lw(scratch1, MemOperand(scratch2)); |
| 4301 | Subu(scratch1, scratch1, Operand(value)); |
| 4302 | sw(scratch1, MemOperand(scratch2)); |
| 4303 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4304 | } |
| 4305 | |
| 4306 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4307 | // ----------------------------------------------------------------------------- |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4308 | // Debugging. |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4309 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4310 | void MacroAssembler::Assert(Condition cc, BailoutReason reason, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4311 | Register rs, Operand rt) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4312 | if (emit_debug_code()) |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4313 | Check(cc, reason, rs, rt); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4314 | } |
| 4315 | |
| 4316 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4317 | void MacroAssembler::AssertFastElements(Register elements) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4318 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4319 | ASSERT(!elements.is(at)); |
| 4320 | Label ok; |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4321 | push(elements); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4322 | lw(elements, FieldMemOperand(elements, HeapObject::kMapOffset)); |
| 4323 | LoadRoot(at, Heap::kFixedArrayMapRootIndex); |
| 4324 | Branch(&ok, eq, elements, Operand(at)); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame] | 4325 | LoadRoot(at, Heap::kFixedDoubleArrayMapRootIndex); |
| 4326 | Branch(&ok, eq, elements, Operand(at)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4327 | LoadRoot(at, Heap::kFixedCOWArrayMapRootIndex); |
| 4328 | Branch(&ok, eq, elements, Operand(at)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4329 | Abort(kJSObjectWithFastElementsMapHasSlowElements); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4330 | bind(&ok); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4331 | pop(elements); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4332 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4333 | } |
| 4334 | |
| 4335 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4336 | void MacroAssembler::Check(Condition cc, BailoutReason reason, |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4337 | Register rs, Operand rt) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4338 | Label L; |
| 4339 | Branch(&L, cc, rs, rt); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4340 | Abort(reason); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4341 | // Will not return here. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4342 | bind(&L); |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4343 | } |
| 4344 | |
| 4345 | |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4346 | void MacroAssembler::Abort(BailoutReason reason) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4347 | Label abort_start; |
| 4348 | bind(&abort_start); |
hpayer@chromium.org | 052c956 | 2014-02-26 12:50:40 +0000 | [diff] [blame] | 4349 | #ifdef DEBUG |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 4350 | const char* msg = GetBailoutReason(reason); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4351 | if (msg != NULL) { |
| 4352 | RecordComment("Abort message: "); |
| 4353 | RecordComment(msg); |
| 4354 | } |
verwaest@chromium.org | 662436e | 2013-08-28 08:41:27 +0000 | [diff] [blame] | 4355 | |
| 4356 | if (FLAG_trap_on_abort) { |
| 4357 | stop(msg); |
| 4358 | return; |
| 4359 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4360 | #endif |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4361 | |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 4362 | li(a0, Operand(Smi::FromInt(reason))); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4363 | push(a0); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4364 | // Disable stub call restrictions to always allow calls to abort. |
| 4365 | if (!has_frame_) { |
| 4366 | // We don't actually want to generate a pile of code for this, so just |
| 4367 | // claim there is a stack frame, without generating one. |
| 4368 | FrameScope scope(this, StackFrame::NONE); |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 4369 | CallRuntime(Runtime::kAbort, 1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4370 | } else { |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 4371 | CallRuntime(Runtime::kAbort, 1); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 4372 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4373 | // Will not return here. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4374 | if (is_trampoline_pool_blocked()) { |
| 4375 | // If the calling code cares about the exact number of |
| 4376 | // instructions generated, we insert padding here to keep the size |
| 4377 | // of the Abort macro constant. |
| 4378 | // Currently in debug mode with debug_code enabled the number of |
titzer@chromium.org | f5a2454 | 2014-03-04 09:06:17 +0000 | [diff] [blame] | 4379 | // generated instructions is 10, so we use this as a maximum value. |
| 4380 | static const int kExpectedAbortInstructions = 10; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4381 | int abort_instructions = InstructionsGeneratedSince(&abort_start); |
| 4382 | ASSERT(abort_instructions <= kExpectedAbortInstructions); |
| 4383 | while (abort_instructions++ < kExpectedAbortInstructions) { |
| 4384 | nop(); |
| 4385 | } |
| 4386 | } |
| 4387 | } |
| 4388 | |
| 4389 | |
| 4390 | void MacroAssembler::LoadContext(Register dst, int context_chain_length) { |
| 4391 | if (context_chain_length > 0) { |
| 4392 | // Move up the chain of contexts to the context containing the slot. |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 4393 | lw(dst, MemOperand(cp, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4394 | for (int i = 1; i < context_chain_length; i++) { |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 4395 | lw(dst, MemOperand(dst, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4396 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4397 | } else { |
| 4398 | // Slot is in the current function context. Move it into the |
| 4399 | // destination register in case we store into it (the write barrier |
| 4400 | // cannot be allowed to destroy the context in esi). |
| 4401 | Move(dst, cp); |
| 4402 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4403 | } |
| 4404 | |
| 4405 | |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 4406 | void MacroAssembler::LoadTransitionedArrayMapConditional( |
| 4407 | ElementsKind expected_kind, |
| 4408 | ElementsKind transitioned_kind, |
| 4409 | Register map_in_out, |
| 4410 | Register scratch, |
| 4411 | Label* no_map_match) { |
| 4412 | // Load the global or builtins object from the current context. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4413 | lw(scratch, |
| 4414 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 4415 | lw(scratch, FieldMemOperand(scratch, GlobalObject::kNativeContextOffset)); |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 4416 | |
| 4417 | // Check that the function's map is the same as the expected cached map. |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4418 | lw(scratch, |
| 4419 | MemOperand(scratch, |
| 4420 | Context::SlotOffset(Context::JS_ARRAY_MAPS_INDEX))); |
| 4421 | size_t offset = expected_kind * kPointerSize + |
| 4422 | FixedArrayBase::kHeaderSize; |
yangguo@chromium.org | 5a11aaf | 2012-06-20 11:29:00 +0000 | [diff] [blame] | 4423 | lw(at, FieldMemOperand(scratch, offset)); |
| 4424 | Branch(no_map_match, ne, map_in_out, Operand(at)); |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 4425 | |
| 4426 | // Use the transitioned cached map. |
svenpanne@chromium.org | 830d30c | 2012-05-29 13:20:14 +0000 | [diff] [blame] | 4427 | offset = transitioned_kind * kPointerSize + |
| 4428 | FixedArrayBase::kHeaderSize; |
| 4429 | lw(map_in_out, FieldMemOperand(scratch, offset)); |
yangguo@chromium.org | 78d1ad4 | 2012-02-09 13:53:47 +0000 | [diff] [blame] | 4430 | } |
| 4431 | |
| 4432 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4433 | void MacroAssembler::LoadGlobalFunction(int index, Register function) { |
| 4434 | // Load the global or builtins object from the current context. |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4435 | lw(function, |
| 4436 | MemOperand(cp, Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX))); |
| 4437 | // Load the native context from the global or builtins object. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4438 | lw(function, FieldMemOperand(function, |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 4439 | GlobalObject::kNativeContextOffset)); |
| 4440 | // Load the function from the native context. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4441 | lw(function, MemOperand(function, Context::SlotOffset(index))); |
| 4442 | } |
| 4443 | |
| 4444 | |
| 4445 | void MacroAssembler::LoadGlobalFunctionInitialMap(Register function, |
| 4446 | Register map, |
| 4447 | Register scratch) { |
| 4448 | // Load the initial map. The global functions all have initial maps. |
| 4449 | lw(map, FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4450 | if (emit_debug_code()) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4451 | Label ok, fail; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4452 | CheckMap(map, scratch, Heap::kMetaMapRootIndex, &fail, DO_SMI_CHECK); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4453 | Branch(&ok); |
| 4454 | bind(&fail); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4455 | Abort(kGlobalFunctionsMustHaveInitialMap); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4456 | bind(&ok); |
| 4457 | } |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 4458 | } |
| 4459 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4460 | |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4461 | void MacroAssembler::Prologue(PrologueFrameMode frame_mode) { |
| 4462 | if (frame_mode == BUILD_STUB_FRAME) { |
| 4463 | Push(ra, fp, cp); |
| 4464 | Push(Smi::FromInt(StackFrame::STUB)); |
| 4465 | // Adjust FP to point to saved FP. |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 4466 | Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4467 | } else { |
| 4468 | PredictableCodeSizeScope predictible_code_size_scope( |
| 4469 | this, kNoCodeAgeSequenceLength * Assembler::kInstrSize); |
| 4470 | // The following three instructions must remain together and unmodified |
| 4471 | // for code aging to work properly. |
machenbach@chromium.org | ed29eb2 | 2013-10-31 13:30:00 +0000 | [diff] [blame] | 4472 | if (isolate()->IsCodePreAgingActive()) { |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4473 | // Pre-age the code. |
| 4474 | Code* stub = Code::GetPreAgedCodeAgeStub(isolate()); |
| 4475 | nop(Assembler::CODE_AGE_MARKER_NOP); |
machenbach@chromium.org | f984189 | 2013-11-25 12:01:13 +0000 | [diff] [blame] | 4476 | // Load the stub address to t9 and call it, |
| 4477 | // GetCodeAgeAndParity() extracts the stub address from this instruction. |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4478 | li(t9, |
machenbach@chromium.org | f984189 | 2013-11-25 12:01:13 +0000 | [diff] [blame] | 4479 | Operand(reinterpret_cast<uint32_t>(stub->instruction_start())), |
| 4480 | CONSTANT_SIZE); |
| 4481 | nop(); // Prevent jalr to jal optimization. |
| 4482 | jalr(t9, a0); |
| 4483 | nop(); // Branch delay slot nop. |
| 4484 | nop(); // Pad the empty space. |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4485 | } else { |
| 4486 | Push(ra, fp, cp, a1); |
| 4487 | nop(Assembler::CODE_AGE_SEQUENCE_NOP); |
| 4488 | // Adjust fp to point to caller's fp. |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 4489 | Addu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
bmeurer@chromium.org | c9913f0 | 2013-10-24 06:31:36 +0000 | [diff] [blame] | 4490 | } |
| 4491 | } |
| 4492 | } |
| 4493 | |
| 4494 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4495 | void MacroAssembler::EnterFrame(StackFrame::Type type) { |
| 4496 | addiu(sp, sp, -5 * kPointerSize); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4497 | li(t8, Operand(Smi::FromInt(type))); |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 4498 | li(t9, Operand(CodeObject()), CONSTANT_SIZE); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4499 | sw(ra, MemOperand(sp, 4 * kPointerSize)); |
| 4500 | sw(fp, MemOperand(sp, 3 * kPointerSize)); |
| 4501 | sw(cp, MemOperand(sp, 2 * kPointerSize)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4502 | sw(t8, MemOperand(sp, 1 * kPointerSize)); |
| 4503 | sw(t9, MemOperand(sp, 0 * kPointerSize)); |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 4504 | // Adjust FP to point to saved FP. |
| 4505 | Addu(fp, sp, |
| 4506 | Operand(StandardFrameConstants::kFixedFrameSizeFromFp + kPointerSize)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4507 | } |
| 4508 | |
| 4509 | |
| 4510 | void MacroAssembler::LeaveFrame(StackFrame::Type type) { |
| 4511 | mov(sp, fp); |
| 4512 | lw(fp, MemOperand(sp, 0 * kPointerSize)); |
| 4513 | lw(ra, MemOperand(sp, 1 * kPointerSize)); |
| 4514 | addiu(sp, sp, 2 * kPointerSize); |
| 4515 | } |
| 4516 | |
| 4517 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4518 | void MacroAssembler::EnterExitFrame(bool save_doubles, |
| 4519 | int stack_space) { |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 4520 | // Set up the frame structure on the stack. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4521 | STATIC_ASSERT(2 * kPointerSize == ExitFrameConstants::kCallerSPDisplacement); |
| 4522 | STATIC_ASSERT(1 * kPointerSize == ExitFrameConstants::kCallerPCOffset); |
| 4523 | STATIC_ASSERT(0 * kPointerSize == ExitFrameConstants::kCallerFPOffset); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4524 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4525 | // This is how the stack will look: |
| 4526 | // fp + 2 (==kCallerSPDisplacement) - old stack's end |
| 4527 | // [fp + 1 (==kCallerPCOffset)] - saved old ra |
| 4528 | // [fp + 0 (==kCallerFPOffset)] - saved old fp |
| 4529 | // [fp - 1 (==kSPOffset)] - sp of the called function |
| 4530 | // [fp - 2 (==kCodeOffset)] - CodeObject |
| 4531 | // fp - (2 + stack_space + alignment) == sp == [fp - kSPOffset] - top of the |
| 4532 | // new stack (will contain saved ra) |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4533 | |
| 4534 | // Save registers. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4535 | addiu(sp, sp, -4 * kPointerSize); |
| 4536 | sw(ra, MemOperand(sp, 3 * kPointerSize)); |
| 4537 | sw(fp, MemOperand(sp, 2 * kPointerSize)); |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 4538 | addiu(fp, sp, 2 * kPointerSize); // Set up new frame pointer. |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4539 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4540 | if (emit_debug_code()) { |
| 4541 | sw(zero_reg, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| 4542 | } |
| 4543 | |
danno@chromium.org | 88aa058 | 2012-03-23 15:11:57 +0000 | [diff] [blame] | 4544 | // Accessed from ExitFrame::code_slot. |
| 4545 | li(t8, Operand(CodeObject()), CONSTANT_SIZE); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4546 | sw(t8, MemOperand(fp, ExitFrameConstants::kCodeOffset)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4547 | |
| 4548 | // Save the frame pointer and the context in top. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 4549 | li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4550 | sw(fp, MemOperand(t8)); |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 4551 | li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4552 | sw(cp, MemOperand(t8)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4553 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4554 | const int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 4555 | if (save_doubles) { |
| 4556 | // The stack must be allign to 0 modulo 8 for stores with sdc1. |
| 4557 | ASSERT(kDoubleSize == frame_alignment); |
| 4558 | if (frame_alignment > 0) { |
| 4559 | ASSERT(IsPowerOf2(frame_alignment)); |
| 4560 | And(sp, sp, Operand(-frame_alignment)); // Align stack. |
| 4561 | } |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 4562 | int space = FPURegister::kMaxNumRegisters * kDoubleSize; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4563 | Subu(sp, sp, Operand(space)); |
| 4564 | // Remember: we only need to save every 2nd double FPU value. |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 4565 | for (int i = 0; i < FPURegister::kMaxNumRegisters; i+=2) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4566 | FPURegister reg = FPURegister::from_code(i); |
| 4567 | sdc1(reg, MemOperand(sp, i * kDoubleSize)); |
| 4568 | } |
| 4569 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4570 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4571 | // Reserve place for the return address, stack space and an optional slot |
| 4572 | // (used by the DirectCEntryStub to hold the return value if a struct is |
| 4573 | // returned) and align the frame preparing for calling the runtime function. |
| 4574 | ASSERT(stack_space >= 0); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4575 | Subu(sp, sp, Operand((stack_space + 2) * kPointerSize)); |
| 4576 | if (frame_alignment > 0) { |
| 4577 | ASSERT(IsPowerOf2(frame_alignment)); |
| 4578 | And(sp, sp, Operand(-frame_alignment)); // Align stack. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4579 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4580 | |
| 4581 | // Set the exit frame sp value to point just before the return address |
| 4582 | // location. |
| 4583 | addiu(at, sp, kPointerSize); |
| 4584 | sw(at, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4585 | } |
| 4586 | |
| 4587 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4588 | void MacroAssembler::LeaveExitFrame(bool save_doubles, |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4589 | Register argument_count, |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4590 | bool restore_context, |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4591 | bool do_return) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4592 | // Optionally restore all double registers. |
| 4593 | if (save_doubles) { |
| 4594 | // Remember: we only need to restore every 2nd double FPU value. |
| 4595 | lw(t8, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 4596 | for (int i = 0; i < FPURegister::kMaxNumRegisters; i+=2) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4597 | FPURegister reg = FPURegister::from_code(i); |
| 4598 | ldc1(reg, MemOperand(t8, i * kDoubleSize + kPointerSize)); |
| 4599 | } |
| 4600 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4601 | |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4602 | // Clear top frame. |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 4603 | li(t8, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4604 | sw(zero_reg, MemOperand(t8)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4605 | |
| 4606 | // Restore current context from top and clear it in debug mode. |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4607 | if (restore_context) { |
| 4608 | li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
| 4609 | lw(cp, MemOperand(t8)); |
| 4610 | } |
hpayer@chromium.org | 2f877ac | 2013-09-18 15:29:06 +0000 | [diff] [blame] | 4611 | #ifdef DEBUG |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4612 | li(t8, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4613 | sw(a3, MemOperand(t8)); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4614 | #endif |
| 4615 | |
| 4616 | // Pop the arguments, restore registers, and return. |
| 4617 | mov(sp, fp); // Respect ABI stack constraint. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4618 | lw(fp, MemOperand(sp, ExitFrameConstants::kCallerFPOffset)); |
| 4619 | lw(ra, MemOperand(sp, ExitFrameConstants::kCallerPCOffset)); |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4620 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4621 | if (argument_count.is_valid()) { |
| 4622 | sll(t8, argument_count, kPointerSizeLog2); |
| 4623 | addu(sp, sp, t8); |
| 4624 | } |
ulan@chromium.org | 6ff6514 | 2012-03-21 09:52:17 +0000 | [diff] [blame] | 4625 | |
| 4626 | if (do_return) { |
| 4627 | Ret(USE_DELAY_SLOT); |
| 4628 | // If returning, the instruction in the delay slot will be the addiu below. |
| 4629 | } |
| 4630 | addiu(sp, sp, 8); |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4631 | } |
| 4632 | |
| 4633 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4634 | void MacroAssembler::InitializeNewString(Register string, |
| 4635 | Register length, |
| 4636 | Heap::RootListIndex map_index, |
| 4637 | Register scratch1, |
| 4638 | Register scratch2) { |
| 4639 | sll(scratch1, length, kSmiTagSize); |
| 4640 | LoadRoot(scratch2, map_index); |
| 4641 | sw(scratch1, FieldMemOperand(string, String::kLengthOffset)); |
| 4642 | li(scratch1, Operand(String::kEmptyHashField)); |
| 4643 | sw(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 4644 | sw(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); |
| 4645 | } |
| 4646 | |
| 4647 | |
| 4648 | int MacroAssembler::ActivationFrameAlignment() { |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 4649 | #if V8_HOST_ARCH_MIPS |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4650 | // Running on the real platform. Use the alignment as mandated by the local |
| 4651 | // environment. |
| 4652 | // Note: This will break if we ever start generating snapshots on one Mips |
| 4653 | // platform for another Mips platform with a different alignment. |
| 4654 | return OS::ActivationFrameAlignment(); |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 4655 | #else // V8_HOST_ARCH_MIPS |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4656 | // If we are using the simulator then we should always align to the expected |
| 4657 | // alignment. As the simulator is used to generate snapshots we do not know |
| 4658 | // if the target platform will need alignment, so this is controlled from a |
| 4659 | // flag. |
| 4660 | return FLAG_sim_stack_alignment; |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 4661 | #endif // V8_HOST_ARCH_MIPS |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4662 | } |
| 4663 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 4664 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4665 | void MacroAssembler::AssertStackIsAligned() { |
| 4666 | if (emit_debug_code()) { |
| 4667 | const int frame_alignment = ActivationFrameAlignment(); |
| 4668 | const int frame_alignment_mask = frame_alignment - 1; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4669 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4670 | if (frame_alignment > kPointerSize) { |
| 4671 | Label alignment_as_expected; |
| 4672 | ASSERT(IsPowerOf2(frame_alignment)); |
| 4673 | andi(at, sp, frame_alignment_mask); |
| 4674 | Branch(&alignment_as_expected, eq, at, Operand(zero_reg)); |
| 4675 | // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| 4676 | stop("Unexpected stack alignment"); |
| 4677 | bind(&alignment_as_expected); |
| 4678 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4679 | } |
kmillikin@chromium.org | 5d8f0e6 | 2010-03-24 08:21:20 +0000 | [diff] [blame] | 4680 | } |
| 4681 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4682 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4683 | void MacroAssembler::JumpIfNotPowerOfTwoOrZero( |
| 4684 | Register reg, |
| 4685 | Register scratch, |
| 4686 | Label* not_power_of_two_or_zero) { |
| 4687 | Subu(scratch, reg, Operand(1)); |
| 4688 | Branch(USE_DELAY_SLOT, not_power_of_two_or_zero, lt, |
| 4689 | scratch, Operand(zero_reg)); |
| 4690 | and_(at, scratch, reg); // In the delay slot. |
| 4691 | Branch(not_power_of_two_or_zero, ne, at, Operand(zero_reg)); |
| 4692 | } |
| 4693 | |
| 4694 | |
danno@chromium.org | fa458e4 | 2012-02-01 10:48:36 +0000 | [diff] [blame] | 4695 | void MacroAssembler::SmiTagCheckOverflow(Register reg, Register overflow) { |
| 4696 | ASSERT(!reg.is(overflow)); |
| 4697 | mov(overflow, reg); // Save original value. |
| 4698 | SmiTag(reg); |
| 4699 | xor_(overflow, overflow, reg); // Overflow if (value ^ 2 * value) < 0. |
| 4700 | } |
| 4701 | |
| 4702 | |
| 4703 | void MacroAssembler::SmiTagCheckOverflow(Register dst, |
| 4704 | Register src, |
| 4705 | Register overflow) { |
| 4706 | if (dst.is(src)) { |
| 4707 | // Fall back to slower case. |
| 4708 | SmiTagCheckOverflow(dst, overflow); |
| 4709 | } else { |
| 4710 | ASSERT(!dst.is(src)); |
| 4711 | ASSERT(!dst.is(overflow)); |
| 4712 | ASSERT(!src.is(overflow)); |
| 4713 | SmiTag(dst, src); |
| 4714 | xor_(overflow, dst, src); // Overflow if (value ^ 2 * value) < 0. |
| 4715 | } |
| 4716 | } |
| 4717 | |
| 4718 | |
| 4719 | void MacroAssembler::UntagAndJumpIfSmi(Register dst, |
| 4720 | Register src, |
| 4721 | Label* smi_case) { |
| 4722 | JumpIfSmi(src, smi_case, at, USE_DELAY_SLOT); |
| 4723 | SmiUntag(dst, src); |
| 4724 | } |
| 4725 | |
| 4726 | |
| 4727 | void MacroAssembler::UntagAndJumpIfNotSmi(Register dst, |
| 4728 | Register src, |
| 4729 | Label* non_smi_case) { |
| 4730 | JumpIfNotSmi(src, non_smi_case, at, USE_DELAY_SLOT); |
| 4731 | SmiUntag(dst, src); |
| 4732 | } |
| 4733 | |
| 4734 | void MacroAssembler::JumpIfSmi(Register value, |
| 4735 | Label* smi_label, |
| 4736 | Register scratch, |
| 4737 | BranchDelaySlot bd) { |
| 4738 | ASSERT_EQ(0, kSmiTag); |
| 4739 | andi(scratch, value, kSmiTagMask); |
| 4740 | Branch(bd, smi_label, eq, scratch, Operand(zero_reg)); |
| 4741 | } |
| 4742 | |
| 4743 | void MacroAssembler::JumpIfNotSmi(Register value, |
| 4744 | Label* not_smi_label, |
| 4745 | Register scratch, |
| 4746 | BranchDelaySlot bd) { |
| 4747 | ASSERT_EQ(0, kSmiTag); |
| 4748 | andi(scratch, value, kSmiTagMask); |
| 4749 | Branch(bd, not_smi_label, ne, scratch, Operand(zero_reg)); |
| 4750 | } |
| 4751 | |
| 4752 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4753 | void MacroAssembler::JumpIfNotBothSmi(Register reg1, |
| 4754 | Register reg2, |
| 4755 | Label* on_not_both_smi) { |
| 4756 | STATIC_ASSERT(kSmiTag == 0); |
| 4757 | ASSERT_EQ(1, kSmiTagMask); |
| 4758 | or_(at, reg1, reg2); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 4759 | JumpIfNotSmi(at, on_not_both_smi); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4760 | } |
| 4761 | |
| 4762 | |
| 4763 | void MacroAssembler::JumpIfEitherSmi(Register reg1, |
| 4764 | Register reg2, |
| 4765 | Label* on_either_smi) { |
| 4766 | STATIC_ASSERT(kSmiTag == 0); |
| 4767 | ASSERT_EQ(1, kSmiTagMask); |
| 4768 | // Both Smi tags must be 1 (not Smi). |
| 4769 | and_(at, reg1, reg2); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 4770 | JumpIfSmi(at, on_either_smi); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4771 | } |
| 4772 | |
| 4773 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4774 | void MacroAssembler::AssertNotSmi(Register object) { |
| 4775 | if (emit_debug_code()) { |
| 4776 | STATIC_ASSERT(kSmiTag == 0); |
| 4777 | andi(at, object, kSmiTagMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4778 | Check(ne, kOperandIsASmi, at, Operand(zero_reg)); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4779 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4780 | } |
| 4781 | |
| 4782 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4783 | void MacroAssembler::AssertSmi(Register object) { |
| 4784 | if (emit_debug_code()) { |
| 4785 | STATIC_ASSERT(kSmiTag == 0); |
| 4786 | andi(at, object, kSmiTagMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4787 | Check(eq, kOperandIsASmi, at, Operand(zero_reg)); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4788 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4789 | } |
| 4790 | |
| 4791 | |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4792 | void MacroAssembler::AssertString(Register object) { |
| 4793 | if (emit_debug_code()) { |
| 4794 | STATIC_ASSERT(kSmiTag == 0); |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 4795 | SmiTst(object, t0); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4796 | Check(ne, kOperandIsASmiAndNotAString, t0, Operand(zero_reg)); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4797 | push(object); |
| 4798 | lw(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 4799 | lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4800 | Check(lo, kOperandIsNotAString, object, Operand(FIRST_NONSTRING_TYPE)); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4801 | pop(object); |
| 4802 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4803 | } |
| 4804 | |
| 4805 | |
svenpanne@chromium.org | 9faefa4 | 2013-03-08 13:13:16 +0000 | [diff] [blame] | 4806 | void MacroAssembler::AssertName(Register object) { |
| 4807 | if (emit_debug_code()) { |
| 4808 | STATIC_ASSERT(kSmiTag == 0); |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 4809 | SmiTst(object, t0); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4810 | Check(ne, kOperandIsASmiAndNotAName, t0, Operand(zero_reg)); |
svenpanne@chromium.org | 9faefa4 | 2013-03-08 13:13:16 +0000 | [diff] [blame] | 4811 | push(object); |
| 4812 | lw(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 4813 | lbu(object, FieldMemOperand(object, Map::kInstanceTypeOffset)); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 4814 | Check(le, kOperandIsNotAName, object, Operand(LAST_NAME_TYPE)); |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 4815 | pop(object); |
svenpanne@chromium.org | 9faefa4 | 2013-03-08 13:13:16 +0000 | [diff] [blame] | 4816 | } |
| 4817 | } |
| 4818 | |
| 4819 | |
machenbach@chromium.org | 2904d1a | 2014-03-18 01:05:18 +0000 | [diff] [blame] | 4820 | void MacroAssembler::AssertUndefinedOrAllocationSite(Register object, |
| 4821 | Register scratch) { |
| 4822 | if (emit_debug_code()) { |
| 4823 | Label done_checking; |
| 4824 | AssertNotSmi(object); |
| 4825 | LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| 4826 | Branch(&done_checking, eq, object, Operand(scratch)); |
| 4827 | push(object); |
| 4828 | lw(object, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 4829 | LoadRoot(scratch, Heap::kAllocationSiteMapRootIndex); |
| 4830 | Assert(eq, kExpectedUndefinedOrCell, object, Operand(scratch)); |
| 4831 | pop(object); |
| 4832 | bind(&done_checking); |
| 4833 | } |
| 4834 | } |
| 4835 | |
| 4836 | |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 4837 | void MacroAssembler::AssertIsRoot(Register reg, Heap::RootListIndex index) { |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4838 | if (emit_debug_code()) { |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 4839 | ASSERT(!reg.is(at)); |
| 4840 | LoadRoot(at, index); |
| 4841 | Check(eq, kHeapNumberMapRegisterClobbered, reg, Operand(at)); |
svenpanne@chromium.org | c859c4f | 2012-10-15 11:51:39 +0000 | [diff] [blame] | 4842 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4843 | } |
| 4844 | |
| 4845 | |
| 4846 | void MacroAssembler::JumpIfNotHeapNumber(Register object, |
| 4847 | Register heap_number_map, |
| 4848 | Register scratch, |
| 4849 | Label* on_not_heap_number) { |
| 4850 | lw(scratch, FieldMemOperand(object, HeapObject::kMapOffset)); |
mstarzinger@chromium.org | 1f410f9 | 2013-08-29 08:13:16 +0000 | [diff] [blame] | 4851 | AssertIsRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4852 | Branch(on_not_heap_number, ne, scratch, Operand(heap_number_map)); |
| 4853 | } |
| 4854 | |
| 4855 | |
machenbach@chromium.org | 528ce02 | 2013-09-23 14:09:36 +0000 | [diff] [blame] | 4856 | void MacroAssembler::LookupNumberStringCache(Register object, |
| 4857 | Register result, |
| 4858 | Register scratch1, |
| 4859 | Register scratch2, |
| 4860 | Register scratch3, |
| 4861 | Label* not_found) { |
| 4862 | // Use of registers. Register result is used as a temporary. |
| 4863 | Register number_string_cache = result; |
| 4864 | Register mask = scratch3; |
| 4865 | |
| 4866 | // Load the number string cache. |
| 4867 | LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| 4868 | |
| 4869 | // Make the hash mask from the length of the number string cache. It |
| 4870 | // contains two elements (number and string) for each cache entry. |
| 4871 | lw(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 4872 | // Divide length by two (length is a smi). |
| 4873 | sra(mask, mask, kSmiTagSize + 1); |
| 4874 | Addu(mask, mask, -1); // Make mask. |
| 4875 | |
| 4876 | // Calculate the entry in the number string cache. The hash value in the |
| 4877 | // number string cache for smis is just the smi value, and the hash for |
| 4878 | // doubles is the xor of the upper and lower words. See |
| 4879 | // Heap::GetNumberStringCache. |
| 4880 | Label is_smi; |
| 4881 | Label load_result_from_cache; |
| 4882 | JumpIfSmi(object, &is_smi); |
| 4883 | CheckMap(object, |
| 4884 | scratch1, |
| 4885 | Heap::kHeapNumberMapRootIndex, |
| 4886 | not_found, |
| 4887 | DONT_DO_SMI_CHECK); |
| 4888 | |
| 4889 | STATIC_ASSERT(8 == kDoubleSize); |
| 4890 | Addu(scratch1, |
| 4891 | object, |
| 4892 | Operand(HeapNumber::kValueOffset - kHeapObjectTag)); |
| 4893 | lw(scratch2, MemOperand(scratch1, kPointerSize)); |
| 4894 | lw(scratch1, MemOperand(scratch1, 0)); |
| 4895 | Xor(scratch1, scratch1, Operand(scratch2)); |
| 4896 | And(scratch1, scratch1, Operand(mask)); |
| 4897 | |
| 4898 | // Calculate address of entry in string cache: each entry consists |
| 4899 | // of two pointer sized fields. |
| 4900 | sll(scratch1, scratch1, kPointerSizeLog2 + 1); |
| 4901 | Addu(scratch1, number_string_cache, scratch1); |
| 4902 | |
| 4903 | Register probe = mask; |
| 4904 | lw(probe, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| 4905 | JumpIfSmi(probe, not_found); |
| 4906 | ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 4907 | ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset)); |
| 4908 | BranchF(&load_result_from_cache, NULL, eq, f12, f14); |
| 4909 | Branch(not_found); |
| 4910 | |
| 4911 | bind(&is_smi); |
| 4912 | Register scratch = scratch1; |
| 4913 | sra(scratch, object, 1); // Shift away the tag. |
| 4914 | And(scratch, mask, Operand(scratch)); |
| 4915 | |
| 4916 | // Calculate address of entry in string cache: each entry consists |
| 4917 | // of two pointer sized fields. |
| 4918 | sll(scratch, scratch, kPointerSizeLog2 + 1); |
| 4919 | Addu(scratch, number_string_cache, scratch); |
| 4920 | |
| 4921 | // Check if the entry is the smi we are looking for. |
| 4922 | lw(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| 4923 | Branch(not_found, ne, object, Operand(probe)); |
| 4924 | |
| 4925 | // Get the result from the cache. |
| 4926 | bind(&load_result_from_cache); |
| 4927 | lw(result, FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize)); |
| 4928 | |
| 4929 | IncrementCounter(isolate()->counters()->number_to_string_native(), |
| 4930 | 1, |
| 4931 | scratch1, |
| 4932 | scratch2); |
| 4933 | } |
| 4934 | |
| 4935 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4936 | void MacroAssembler::JumpIfNonSmisNotBothSequentialAsciiStrings( |
| 4937 | Register first, |
| 4938 | Register second, |
| 4939 | Register scratch1, |
| 4940 | Register scratch2, |
| 4941 | Label* failure) { |
| 4942 | // Test that both first and second are sequential ASCII strings. |
| 4943 | // Assume that they are non-smis. |
| 4944 | lw(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); |
| 4945 | lw(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); |
| 4946 | lbu(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); |
| 4947 | lbu(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); |
| 4948 | |
| 4949 | JumpIfBothInstanceTypesAreNotSequentialAscii(scratch1, |
| 4950 | scratch2, |
| 4951 | scratch1, |
| 4952 | scratch2, |
| 4953 | failure); |
| 4954 | } |
| 4955 | |
| 4956 | |
| 4957 | void MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first, |
| 4958 | Register second, |
| 4959 | Register scratch1, |
| 4960 | Register scratch2, |
| 4961 | Label* failure) { |
| 4962 | // Check that neither is a smi. |
| 4963 | STATIC_ASSERT(kSmiTag == 0); |
| 4964 | And(scratch1, first, Operand(second)); |
jkummerow@chromium.org | c3b3712 | 2011-11-07 10:14:12 +0000 | [diff] [blame] | 4965 | JumpIfSmi(scratch1, failure); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4966 | JumpIfNonSmisNotBothSequentialAsciiStrings(first, |
| 4967 | second, |
| 4968 | scratch1, |
| 4969 | scratch2, |
| 4970 | failure); |
| 4971 | } |
| 4972 | |
| 4973 | |
| 4974 | void MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( |
| 4975 | Register first, |
| 4976 | Register second, |
| 4977 | Register scratch1, |
| 4978 | Register scratch2, |
| 4979 | Label* failure) { |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 4980 | const int kFlatAsciiStringMask = |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 4981 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 4982 | const int kFlatAsciiStringTag = |
| 4983 | kStringTag | kOneByteStringTag | kSeqStringTag; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4984 | ASSERT(kFlatAsciiStringTag <= 0xffff); // Ensure this fits 16-bit immed. |
| 4985 | andi(scratch1, first, kFlatAsciiStringMask); |
| 4986 | Branch(failure, ne, scratch1, Operand(kFlatAsciiStringTag)); |
| 4987 | andi(scratch2, second, kFlatAsciiStringMask); |
| 4988 | Branch(failure, ne, scratch2, Operand(kFlatAsciiStringTag)); |
| 4989 | } |
| 4990 | |
| 4991 | |
| 4992 | void MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(Register type, |
| 4993 | Register scratch, |
| 4994 | Label* failure) { |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 4995 | const int kFlatAsciiStringMask = |
yangguo@chromium.org | 46a2a51 | 2013-01-18 16:29:40 +0000 | [diff] [blame] | 4996 | kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; |
yangguo@chromium.org | c73d55b | 2013-07-24 08:18:28 +0000 | [diff] [blame] | 4997 | const int kFlatAsciiStringTag = |
| 4998 | kStringTag | kOneByteStringTag | kSeqStringTag; |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4999 | And(scratch, type, Operand(kFlatAsciiStringMask)); |
| 5000 | Branch(failure, ne, scratch, Operand(kFlatAsciiStringTag)); |
| 5001 | } |
| 5002 | |
| 5003 | |
| 5004 | static const int kRegisterPassedArguments = 4; |
| 5005 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5006 | int MacroAssembler::CalculateStackPassedWords(int num_reg_arguments, |
| 5007 | int num_double_arguments) { |
| 5008 | int stack_passed_words = 0; |
| 5009 | num_reg_arguments += 2 * num_double_arguments; |
| 5010 | |
| 5011 | // Up to four simple arguments are passed in registers a0..a3. |
| 5012 | if (num_reg_arguments > kRegisterPassedArguments) { |
| 5013 | stack_passed_words += num_reg_arguments - kRegisterPassedArguments; |
| 5014 | } |
| 5015 | stack_passed_words += kCArgSlotCount; |
| 5016 | return stack_passed_words; |
| 5017 | } |
| 5018 | |
| 5019 | |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5020 | void MacroAssembler::EmitSeqStringSetCharCheck(Register string, |
| 5021 | Register index, |
| 5022 | Register value, |
| 5023 | Register scratch, |
| 5024 | uint32_t encoding_mask) { |
| 5025 | Label is_object; |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 5026 | SmiTst(string, at); |
machenbach@chromium.org | 05150ab | 2014-01-29 08:13:29 +0000 | [diff] [blame] | 5027 | Check(ne, kNonObject, at, Operand(zero_reg)); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5028 | |
| 5029 | lw(at, FieldMemOperand(string, HeapObject::kMapOffset)); |
| 5030 | lbu(at, FieldMemOperand(at, Map::kInstanceTypeOffset)); |
| 5031 | |
| 5032 | andi(at, at, kStringRepresentationMask | kStringEncodingMask); |
| 5033 | li(scratch, Operand(encoding_mask)); |
machenbach@chromium.org | 05150ab | 2014-01-29 08:13:29 +0000 | [diff] [blame] | 5034 | Check(eq, kUnexpectedStringType, at, Operand(scratch)); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5035 | |
| 5036 | // The index is assumed to be untagged coming in, tag it to compare with the |
| 5037 | // string length without using a temp register, it is restored at the end of |
| 5038 | // this function. |
| 5039 | Label index_tag_ok, index_tag_bad; |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 5040 | TrySmiTag(index, scratch, &index_tag_bad); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5041 | Branch(&index_tag_ok); |
| 5042 | bind(&index_tag_bad); |
machenbach@chromium.org | 05150ab | 2014-01-29 08:13:29 +0000 | [diff] [blame] | 5043 | Abort(kIndexIsTooLarge); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5044 | bind(&index_tag_ok); |
| 5045 | |
| 5046 | lw(at, FieldMemOperand(string, String::kLengthOffset)); |
machenbach@chromium.org | 05150ab | 2014-01-29 08:13:29 +0000 | [diff] [blame] | 5047 | Check(lt, kIndexIsTooLarge, index, Operand(at)); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5048 | |
machenbach@chromium.org | 7ff7607 | 2013-11-21 09:47:43 +0000 | [diff] [blame] | 5049 | ASSERT(Smi::FromInt(0) == 0); |
machenbach@chromium.org | 05150ab | 2014-01-29 08:13:29 +0000 | [diff] [blame] | 5050 | Check(ge, kIndexIsNegative, index, Operand(zero_reg)); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5051 | |
| 5052 | SmiUntag(index, index); |
| 5053 | } |
| 5054 | |
| 5055 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5056 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 5057 | int num_double_arguments, |
| 5058 | Register scratch) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5059 | int frame_alignment = ActivationFrameAlignment(); |
| 5060 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5061 | // Up to four simple arguments are passed in registers a0..a3. |
| 5062 | // Those four arguments must have reserved argument slots on the stack for |
| 5063 | // mips, even though those argument slots are not normally used. |
| 5064 | // Remaining arguments are pushed on the stack, above (higher address than) |
| 5065 | // the argument slots. |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5066 | int stack_passed_arguments = CalculateStackPassedWords( |
| 5067 | num_reg_arguments, num_double_arguments); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5068 | if (frame_alignment > kPointerSize) { |
| 5069 | // Make stack end at alignment and make room for num_arguments - 4 words |
| 5070 | // and the original value of sp. |
| 5071 | mov(scratch, sp); |
| 5072 | Subu(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); |
| 5073 | ASSERT(IsPowerOf2(frame_alignment)); |
| 5074 | And(sp, sp, Operand(-frame_alignment)); |
| 5075 | sw(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 5076 | } else { |
| 5077 | Subu(sp, sp, Operand(stack_passed_arguments * kPointerSize)); |
| 5078 | } |
| 5079 | } |
| 5080 | |
| 5081 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5082 | void MacroAssembler::PrepareCallCFunction(int num_reg_arguments, |
| 5083 | Register scratch) { |
| 5084 | PrepareCallCFunction(num_reg_arguments, 0, scratch); |
| 5085 | } |
| 5086 | |
| 5087 | |
| 5088 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 5089 | int num_reg_arguments, |
| 5090 | int num_double_arguments) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5091 | li(t8, Operand(function)); |
| 5092 | CallCFunctionHelper(t8, num_reg_arguments, num_double_arguments); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5093 | } |
| 5094 | |
| 5095 | |
| 5096 | void MacroAssembler::CallCFunction(Register function, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5097 | int num_reg_arguments, |
| 5098 | int num_double_arguments) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5099 | CallCFunctionHelper(function, num_reg_arguments, num_double_arguments); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5100 | } |
| 5101 | |
| 5102 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5103 | void MacroAssembler::CallCFunction(ExternalReference function, |
| 5104 | int num_arguments) { |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5105 | CallCFunction(function, num_arguments, 0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5106 | } |
| 5107 | |
| 5108 | |
| 5109 | void MacroAssembler::CallCFunction(Register function, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5110 | int num_arguments) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5111 | CallCFunction(function, num_arguments, 0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5112 | } |
| 5113 | |
| 5114 | |
| 5115 | void MacroAssembler::CallCFunctionHelper(Register function, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5116 | int num_reg_arguments, |
| 5117 | int num_double_arguments) { |
| 5118 | ASSERT(has_frame()); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5119 | // Make sure that the stack is aligned before calling a C function unless |
| 5120 | // running in the simulator. The simulator has its own alignment check which |
| 5121 | // provides more information. |
| 5122 | // The argument stots are presumed to have been set up by |
| 5123 | // PrepareCallCFunction. The C function must be called via t9, for mips ABI. |
| 5124 | |
jkummerow@chromium.org | 93a47f4 | 2013-07-02 14:43:41 +0000 | [diff] [blame] | 5125 | #if V8_HOST_ARCH_MIPS |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5126 | if (emit_debug_code()) { |
| 5127 | int frame_alignment = OS::ActivationFrameAlignment(); |
| 5128 | int frame_alignment_mask = frame_alignment - 1; |
| 5129 | if (frame_alignment > kPointerSize) { |
| 5130 | ASSERT(IsPowerOf2(frame_alignment)); |
| 5131 | Label alignment_as_expected; |
| 5132 | And(at, sp, Operand(frame_alignment_mask)); |
| 5133 | Branch(&alignment_as_expected, eq, at, Operand(zero_reg)); |
| 5134 | // Don't use Check here, as it will call Runtime_Abort possibly |
| 5135 | // re-entering here. |
| 5136 | stop("Unexpected alignment in CallCFunction"); |
| 5137 | bind(&alignment_as_expected); |
| 5138 | } |
| 5139 | } |
| 5140 | #endif // V8_HOST_ARCH_MIPS |
| 5141 | |
| 5142 | // Just call directly. The function called cannot cause a GC, or |
| 5143 | // allow preemption, so the return address in the link register |
| 5144 | // stays correct. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5145 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5146 | if (!function.is(t9)) { |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 5147 | mov(t9, function); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5148 | function = t9; |
| 5149 | } |
| 5150 | |
| 5151 | Call(function); |
| 5152 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5153 | int stack_passed_arguments = CalculateStackPassedWords( |
| 5154 | num_reg_arguments, num_double_arguments); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5155 | |
| 5156 | if (OS::ActivationFrameAlignment() > kPointerSize) { |
| 5157 | lw(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); |
| 5158 | } else { |
| 5159 | Addu(sp, sp, Operand(stack_passed_arguments * sizeof(kPointerSize))); |
| 5160 | } |
| 5161 | } |
| 5162 | |
| 5163 | |
| 5164 | #undef BRANCH_ARGS_CHECK |
| 5165 | |
| 5166 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5167 | void MacroAssembler::PatchRelocatedValue(Register li_location, |
| 5168 | Register scratch, |
| 5169 | Register new_value) { |
| 5170 | lw(scratch, MemOperand(li_location)); |
| 5171 | // At this point scratch is a lui(at, ...) instruction. |
| 5172 | if (emit_debug_code()) { |
| 5173 | And(scratch, scratch, kOpcodeMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5174 | Check(eq, kTheInstructionToPatchShouldBeALui, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5175 | scratch, Operand(LUI)); |
| 5176 | lw(scratch, MemOperand(li_location)); |
| 5177 | } |
| 5178 | srl(t9, new_value, kImm16Bits); |
| 5179 | Ins(scratch, t9, 0, kImm16Bits); |
| 5180 | sw(scratch, MemOperand(li_location)); |
| 5181 | |
| 5182 | lw(scratch, MemOperand(li_location, kInstrSize)); |
| 5183 | // scratch is now ori(at, ...). |
| 5184 | if (emit_debug_code()) { |
| 5185 | And(scratch, scratch, kOpcodeMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5186 | Check(eq, kTheInstructionToPatchShouldBeAnOri, |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5187 | scratch, Operand(ORI)); |
| 5188 | lw(scratch, MemOperand(li_location, kInstrSize)); |
| 5189 | } |
| 5190 | Ins(scratch, new_value, 0, kImm16Bits); |
| 5191 | sw(scratch, MemOperand(li_location, kInstrSize)); |
| 5192 | |
| 5193 | // Update the I-cache so the new lui and ori can be executed. |
| 5194 | FlushICache(li_location, 2); |
| 5195 | } |
| 5196 | |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 5197 | void MacroAssembler::GetRelocatedValue(Register li_location, |
| 5198 | Register value, |
| 5199 | Register scratch) { |
| 5200 | lw(value, MemOperand(li_location)); |
| 5201 | if (emit_debug_code()) { |
| 5202 | And(value, value, kOpcodeMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5203 | Check(eq, kTheInstructionShouldBeALui, |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 5204 | value, Operand(LUI)); |
| 5205 | lw(value, MemOperand(li_location)); |
| 5206 | } |
| 5207 | |
| 5208 | // value now holds a lui instruction. Extract the immediate. |
| 5209 | sll(value, value, kImm16Bits); |
| 5210 | |
| 5211 | lw(scratch, MemOperand(li_location, kInstrSize)); |
| 5212 | if (emit_debug_code()) { |
| 5213 | And(scratch, scratch, kOpcodeMask); |
danno@chromium.org | 5940060 | 2013-08-13 17:09:37 +0000 | [diff] [blame] | 5214 | Check(eq, kTheInstructionShouldBeAnOri, |
jkummerow@chromium.org | 05ed9dd | 2012-01-23 14:42:48 +0000 | [diff] [blame] | 5215 | scratch, Operand(ORI)); |
| 5216 | lw(scratch, MemOperand(li_location, kInstrSize)); |
| 5217 | } |
| 5218 | // "scratch" now holds an ori instruction. Extract the immediate. |
| 5219 | andi(scratch, scratch, kImm16Mask); |
| 5220 | |
| 5221 | // Merge the results. |
| 5222 | or_(value, value, scratch); |
| 5223 | } |
| 5224 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5225 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5226 | void MacroAssembler::CheckPageFlag( |
| 5227 | Register object, |
| 5228 | Register scratch, |
| 5229 | int mask, |
| 5230 | Condition cc, |
| 5231 | Label* condition_met) { |
| 5232 | And(scratch, object, Operand(~Page::kPageAlignmentMask)); |
| 5233 | lw(scratch, MemOperand(scratch, MemoryChunk::kFlagsOffset)); |
| 5234 | And(scratch, scratch, Operand(mask)); |
| 5235 | Branch(condition_met, cc, scratch, Operand(zero_reg)); |
| 5236 | } |
| 5237 | |
| 5238 | |
danno@chromium.org | f005df6 | 2013-04-30 16:36:45 +0000 | [diff] [blame] | 5239 | void MacroAssembler::CheckMapDeprecated(Handle<Map> map, |
| 5240 | Register scratch, |
| 5241 | Label* if_deprecated) { |
| 5242 | if (map->CanBeDeprecated()) { |
| 5243 | li(scratch, Operand(map)); |
| 5244 | lw(scratch, FieldMemOperand(scratch, Map::kBitField3Offset)); |
| 5245 | And(scratch, scratch, Operand(Smi::FromInt(Map::Deprecated::kMask))); |
| 5246 | Branch(if_deprecated, ne, scratch, Operand(zero_reg)); |
| 5247 | } |
| 5248 | } |
| 5249 | |
| 5250 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5251 | void MacroAssembler::JumpIfBlack(Register object, |
| 5252 | Register scratch0, |
| 5253 | Register scratch1, |
| 5254 | Label* on_black) { |
| 5255 | HasColor(object, scratch0, scratch1, on_black, 1, 0); // kBlackBitPattern. |
| 5256 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 5257 | } |
| 5258 | |
| 5259 | |
| 5260 | void MacroAssembler::HasColor(Register object, |
| 5261 | Register bitmap_scratch, |
| 5262 | Register mask_scratch, |
| 5263 | Label* has_color, |
| 5264 | int first_bit, |
| 5265 | int second_bit) { |
| 5266 | ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, t8)); |
| 5267 | ASSERT(!AreAliased(object, bitmap_scratch, mask_scratch, t9)); |
| 5268 | |
| 5269 | GetMarkBits(object, bitmap_scratch, mask_scratch); |
| 5270 | |
| 5271 | Label other_color, word_boundary; |
| 5272 | lw(t9, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 5273 | And(t8, t9, Operand(mask_scratch)); |
| 5274 | Branch(&other_color, first_bit == 1 ? eq : ne, t8, Operand(zero_reg)); |
| 5275 | // Shift left 1 by adding. |
| 5276 | Addu(mask_scratch, mask_scratch, Operand(mask_scratch)); |
| 5277 | Branch(&word_boundary, eq, mask_scratch, Operand(zero_reg)); |
| 5278 | And(t8, t9, Operand(mask_scratch)); |
| 5279 | Branch(has_color, second_bit == 1 ? ne : eq, t8, Operand(zero_reg)); |
| 5280 | jmp(&other_color); |
| 5281 | |
| 5282 | bind(&word_boundary); |
| 5283 | lw(t9, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize + kPointerSize)); |
| 5284 | And(t9, t9, Operand(1)); |
| 5285 | Branch(has_color, second_bit == 1 ? ne : eq, t9, Operand(zero_reg)); |
| 5286 | bind(&other_color); |
| 5287 | } |
| 5288 | |
| 5289 | |
| 5290 | // Detect some, but not all, common pointer-free objects. This is used by the |
| 5291 | // incremental write barrier which doesn't care about oddballs (they are always |
| 5292 | // marked black immediately so this code is not hit). |
| 5293 | void MacroAssembler::JumpIfDataObject(Register value, |
| 5294 | Register scratch, |
| 5295 | Label* not_data_object) { |
| 5296 | ASSERT(!AreAliased(value, scratch, t8, no_reg)); |
| 5297 | Label is_data_object; |
| 5298 | lw(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 5299 | LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| 5300 | Branch(&is_data_object, eq, t8, Operand(scratch)); |
| 5301 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 5302 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 5303 | // If it's a string and it's not a cons string then it's an object containing |
| 5304 | // no GC pointers. |
| 5305 | lbu(scratch, FieldMemOperand(scratch, Map::kInstanceTypeOffset)); |
| 5306 | And(t8, scratch, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| 5307 | Branch(not_data_object, ne, t8, Operand(zero_reg)); |
| 5308 | bind(&is_data_object); |
| 5309 | } |
| 5310 | |
| 5311 | |
| 5312 | void MacroAssembler::GetMarkBits(Register addr_reg, |
| 5313 | Register bitmap_reg, |
| 5314 | Register mask_reg) { |
| 5315 | ASSERT(!AreAliased(addr_reg, bitmap_reg, mask_reg, no_reg)); |
| 5316 | And(bitmap_reg, addr_reg, Operand(~Page::kPageAlignmentMask)); |
| 5317 | Ext(mask_reg, addr_reg, kPointerSizeLog2, Bitmap::kBitsPerCellLog2); |
| 5318 | const int kLowBits = kPointerSizeLog2 + Bitmap::kBitsPerCellLog2; |
| 5319 | Ext(t8, addr_reg, kLowBits, kPageSizeBits - kLowBits); |
| 5320 | sll(t8, t8, kPointerSizeLog2); |
| 5321 | Addu(bitmap_reg, bitmap_reg, t8); |
| 5322 | li(t8, Operand(1)); |
| 5323 | sllv(mask_reg, t8, mask_reg); |
| 5324 | } |
| 5325 | |
| 5326 | |
| 5327 | void MacroAssembler::EnsureNotWhite( |
| 5328 | Register value, |
| 5329 | Register bitmap_scratch, |
| 5330 | Register mask_scratch, |
| 5331 | Register load_scratch, |
| 5332 | Label* value_is_white_and_not_data) { |
| 5333 | ASSERT(!AreAliased(value, bitmap_scratch, mask_scratch, t8)); |
| 5334 | GetMarkBits(value, bitmap_scratch, mask_scratch); |
| 5335 | |
| 5336 | // If the value is black or grey we don't need to do anything. |
| 5337 | ASSERT(strcmp(Marking::kWhiteBitPattern, "00") == 0); |
| 5338 | ASSERT(strcmp(Marking::kBlackBitPattern, "10") == 0); |
| 5339 | ASSERT(strcmp(Marking::kGreyBitPattern, "11") == 0); |
| 5340 | ASSERT(strcmp(Marking::kImpossibleBitPattern, "01") == 0); |
| 5341 | |
| 5342 | Label done; |
| 5343 | |
| 5344 | // Since both black and grey have a 1 in the first position and white does |
| 5345 | // not have a 1 there we only need to check one bit. |
| 5346 | lw(load_scratch, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 5347 | And(t8, mask_scratch, load_scratch); |
| 5348 | Branch(&done, ne, t8, Operand(zero_reg)); |
| 5349 | |
erik.corry@gmail.com | f2038fb | 2012-01-16 11:42:08 +0000 | [diff] [blame] | 5350 | if (emit_debug_code()) { |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5351 | // Check for impossible bit pattern. |
| 5352 | Label ok; |
| 5353 | // sll may overflow, making the check conservative. |
| 5354 | sll(t8, mask_scratch, 1); |
| 5355 | And(t8, load_scratch, t8); |
| 5356 | Branch(&ok, eq, t8, Operand(zero_reg)); |
| 5357 | stop("Impossible marking bit pattern"); |
| 5358 | bind(&ok); |
| 5359 | } |
| 5360 | |
| 5361 | // Value is white. We check whether it is data that doesn't need scanning. |
| 5362 | // Currently only checks for HeapNumber and non-cons strings. |
| 5363 | Register map = load_scratch; // Holds map while checking type. |
| 5364 | Register length = load_scratch; // Holds length of object after testing type. |
| 5365 | Label is_data_object; |
| 5366 | |
| 5367 | // Check for heap-number |
| 5368 | lw(map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 5369 | LoadRoot(t8, Heap::kHeapNumberMapRootIndex); |
| 5370 | { |
| 5371 | Label skip; |
| 5372 | Branch(&skip, ne, t8, Operand(map)); |
| 5373 | li(length, HeapNumber::kSize); |
| 5374 | Branch(&is_data_object); |
| 5375 | bind(&skip); |
| 5376 | } |
| 5377 | |
| 5378 | // Check for strings. |
| 5379 | ASSERT(kIsIndirectStringTag == 1 && kIsIndirectStringMask == 1); |
| 5380 | ASSERT(kNotStringTag == 0x80 && kIsNotStringMask == 0x80); |
| 5381 | // If it's a string and it's not a cons string then it's an object containing |
| 5382 | // no GC pointers. |
| 5383 | Register instance_type = load_scratch; |
| 5384 | lbu(instance_type, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 5385 | And(t8, instance_type, Operand(kIsIndirectStringMask | kIsNotStringMask)); |
| 5386 | Branch(value_is_white_and_not_data, ne, t8, Operand(zero_reg)); |
| 5387 | // It's a non-indirect (non-cons and non-slice) string. |
| 5388 | // If it's external, the length is just ExternalString::kSize. |
| 5389 | // Otherwise it's String::kHeaderSize + string->length() * (1 or 2). |
| 5390 | // External strings are the only ones with the kExternalStringTag bit |
| 5391 | // set. |
| 5392 | ASSERT_EQ(0, kSeqStringTag & kExternalStringTag); |
| 5393 | ASSERT_EQ(0, kConsStringTag & kExternalStringTag); |
| 5394 | And(t8, instance_type, Operand(kExternalStringTag)); |
| 5395 | { |
| 5396 | Label skip; |
| 5397 | Branch(&skip, eq, t8, Operand(zero_reg)); |
| 5398 | li(length, ExternalString::kSize); |
| 5399 | Branch(&is_data_object); |
| 5400 | bind(&skip); |
| 5401 | } |
| 5402 | |
| 5403 | // Sequential string, either ASCII or UC16. |
| 5404 | // For ASCII (char-size of 1) we shift the smi tag away to get the length. |
| 5405 | // For UC16 (char-size of 2) we just leave the smi tag in place, thereby |
| 5406 | // getting the length multiplied by 2. |
mvstanton@chromium.org | e4ac3ef | 2012-11-12 14:53:34 +0000 | [diff] [blame] | 5407 | ASSERT(kOneByteStringTag == 4 && kStringEncodingMask == 4); |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5408 | ASSERT(kSmiTag == 0 && kSmiTagSize == 1); |
| 5409 | lw(t9, FieldMemOperand(value, String::kLengthOffset)); |
| 5410 | And(t8, instance_type, Operand(kStringEncodingMask)); |
| 5411 | { |
| 5412 | Label skip; |
| 5413 | Branch(&skip, eq, t8, Operand(zero_reg)); |
| 5414 | srl(t9, t9, 1); |
| 5415 | bind(&skip); |
| 5416 | } |
| 5417 | Addu(length, t9, Operand(SeqString::kHeaderSize + kObjectAlignmentMask)); |
| 5418 | And(length, length, Operand(~kObjectAlignmentMask)); |
| 5419 | |
| 5420 | bind(&is_data_object); |
| 5421 | // Value is a data object, and it is white. Mark it black. Since we know |
| 5422 | // that the object is white we can make it black by flipping one bit. |
| 5423 | lw(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 5424 | Or(t8, t8, Operand(mask_scratch)); |
| 5425 | sw(t8, MemOperand(bitmap_scratch, MemoryChunk::kHeaderSize)); |
| 5426 | |
| 5427 | And(bitmap_scratch, bitmap_scratch, Operand(~Page::kPageAlignmentMask)); |
| 5428 | lw(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| 5429 | Addu(t8, t8, Operand(length)); |
| 5430 | sw(t8, MemOperand(bitmap_scratch, MemoryChunk::kLiveBytesOffset)); |
| 5431 | |
| 5432 | bind(&done); |
| 5433 | } |
| 5434 | |
| 5435 | |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5436 | void MacroAssembler::Throw(BailoutReason reason) { |
| 5437 | Label throw_start; |
| 5438 | bind(&throw_start); |
| 5439 | #ifdef DEBUG |
| 5440 | const char* msg = GetBailoutReason(reason); |
| 5441 | if (msg != NULL) { |
| 5442 | RecordComment("Throw message: "); |
| 5443 | RecordComment(msg); |
| 5444 | } |
| 5445 | #endif |
| 5446 | |
| 5447 | li(a0, Operand(Smi::FromInt(reason))); |
| 5448 | push(a0); |
| 5449 | // Disable stub call restrictions to always allow calls to throw. |
| 5450 | if (!has_frame_) { |
| 5451 | // We don't actually want to generate a pile of code for this, so just |
| 5452 | // claim there is a stack frame, without generating one. |
| 5453 | FrameScope scope(this, StackFrame::NONE); |
machenbach@chromium.org | 895f00d | 2014-03-27 01:04:43 +0000 | [diff] [blame] | 5454 | CallRuntime(Runtime::kHiddenThrowMessage, 1); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5455 | } else { |
machenbach@chromium.org | 895f00d | 2014-03-27 01:04:43 +0000 | [diff] [blame] | 5456 | CallRuntime(Runtime::kHiddenThrowMessage, 1); |
machenbach@chromium.org | 9af454f | 2013-11-20 09:25:57 +0000 | [diff] [blame] | 5457 | } |
| 5458 | // will not return here |
| 5459 | if (is_trampoline_pool_blocked()) { |
| 5460 | // If the calling code cares throw the exact number of |
| 5461 | // instructions generated, we insert padding here to keep the size |
| 5462 | // of the ThrowMessage macro constant. |
| 5463 | // Currently in debug mode with debug_code enabled the number of |
| 5464 | // generated instructions is 14, so we use this as a maximum value. |
| 5465 | static const int kExpectedThrowMessageInstructions = 14; |
| 5466 | int throw_instructions = InstructionsGeneratedSince(&throw_start); |
| 5467 | ASSERT(throw_instructions <= kExpectedThrowMessageInstructions); |
| 5468 | while (throw_instructions++ < kExpectedThrowMessageInstructions) { |
| 5469 | nop(); |
| 5470 | } |
| 5471 | } |
| 5472 | } |
| 5473 | |
| 5474 | |
| 5475 | void MacroAssembler::ThrowIf(Condition cc, |
| 5476 | BailoutReason reason, |
| 5477 | Register rs, |
| 5478 | Operand rt) { |
| 5479 | Label L; |
| 5480 | Branch(&L, NegateCondition(cc), rs, rt); |
| 5481 | Throw(reason); |
| 5482 | // will not return here |
| 5483 | bind(&L); |
| 5484 | } |
| 5485 | |
| 5486 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 5487 | void MacroAssembler::LoadInstanceDescriptors(Register map, |
rossberg@chromium.org | 89e18f5 | 2012-10-22 13:09:53 +0000 | [diff] [blame] | 5488 | Register descriptors) { |
| 5489 | lw(descriptors, FieldMemOperand(map, Map::kDescriptorsOffset)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 5490 | } |
| 5491 | |
| 5492 | |
verwaest@chromium.org | 33e09c8 | 2012-10-10 17:07:22 +0000 | [diff] [blame] | 5493 | void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { |
| 5494 | lw(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 5495 | DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); |
| 5496 | } |
| 5497 | |
| 5498 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5499 | void MacroAssembler::EnumLength(Register dst, Register map) { |
| 5500 | STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
| 5501 | lw(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
| 5502 | And(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask))); |
| 5503 | } |
| 5504 | |
| 5505 | |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5506 | void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5507 | Register empty_fixed_array_value = t2; |
| 5508 | LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5509 | Label next, start; |
| 5510 | mov(a2, a0); |
| 5511 | |
| 5512 | // Check if the enum length field is properly initialized, indicating that |
| 5513 | // there is an enum cache. |
| 5514 | lw(a1, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| 5515 | |
| 5516 | EnumLength(a3, a1); |
machenbach@chromium.org | af9cfcb | 2013-11-19 11:05:18 +0000 | [diff] [blame] | 5517 | Branch( |
| 5518 | call_runtime, eq, a3, Operand(Smi::FromInt(kInvalidEnumCacheSentinel))); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5519 | |
| 5520 | jmp(&start); |
| 5521 | |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5522 | bind(&next); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5523 | lw(a1, FieldMemOperand(a2, HeapObject::kMapOffset)); |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5524 | |
| 5525 | // For all objects but the receiver, check that the cache is empty. |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5526 | EnumLength(a3, a1); |
| 5527 | Branch(call_runtime, ne, a3, Operand(Smi::FromInt(0))); |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5528 | |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5529 | bind(&start); |
| 5530 | |
machenbach@chromium.org | 6d26cbb | 2014-01-22 10:50:56 +0000 | [diff] [blame] | 5531 | // Check that there are no elements. Register a2 contains the current JS |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5532 | // object we've reached through the prototype chain. |
machenbach@chromium.org | 6d26cbb | 2014-01-22 10:50:56 +0000 | [diff] [blame] | 5533 | Label no_elements; |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5534 | lw(a2, FieldMemOperand(a2, JSObject::kElementsOffset)); |
machenbach@chromium.org | 6d26cbb | 2014-01-22 10:50:56 +0000 | [diff] [blame] | 5535 | Branch(&no_elements, eq, a2, Operand(empty_fixed_array_value)); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5536 | |
machenbach@chromium.org | 6d26cbb | 2014-01-22 10:50:56 +0000 | [diff] [blame] | 5537 | // Second chance, the object may be using the empty slow element dictionary. |
| 5538 | LoadRoot(at, Heap::kEmptySlowElementDictionaryRootIndex); |
| 5539 | Branch(call_runtime, ne, a2, Operand(at)); |
| 5540 | |
| 5541 | bind(&no_elements); |
jkummerow@chromium.org | 78502a9 | 2012-09-06 13:50:42 +0000 | [diff] [blame] | 5542 | lw(a2, FieldMemOperand(a1, Map::kPrototypeOffset)); |
| 5543 | Branch(&next, ne, a2, Operand(null_value)); |
ulan@chromium.org | 812308e | 2012-02-29 15:58:45 +0000 | [diff] [blame] | 5544 | } |
| 5545 | |
| 5546 | |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5547 | void MacroAssembler::ClampUint8(Register output_reg, Register input_reg) { |
| 5548 | ASSERT(!output_reg.is(input_reg)); |
| 5549 | Label done; |
| 5550 | li(output_reg, Operand(255)); |
| 5551 | // Normal branch: nop in delay slot. |
| 5552 | Branch(&done, gt, input_reg, Operand(output_reg)); |
| 5553 | // Use delay slot in this branch. |
| 5554 | Branch(USE_DELAY_SLOT, &done, lt, input_reg, Operand(zero_reg)); |
| 5555 | mov(output_reg, zero_reg); // In delay slot. |
| 5556 | mov(output_reg, input_reg); // Value is in range 0..255. |
| 5557 | bind(&done); |
| 5558 | } |
| 5559 | |
| 5560 | |
| 5561 | void MacroAssembler::ClampDoubleToUint8(Register result_reg, |
| 5562 | DoubleRegister input_reg, |
| 5563 | DoubleRegister temp_double_reg) { |
| 5564 | Label above_zero; |
| 5565 | Label done; |
| 5566 | Label in_bounds; |
| 5567 | |
| 5568 | Move(temp_double_reg, 0.0); |
| 5569 | BranchF(&above_zero, NULL, gt, input_reg, temp_double_reg); |
| 5570 | |
| 5571 | // Double value is less than zero, NaN or Inf, return 0. |
| 5572 | mov(result_reg, zero_reg); |
| 5573 | Branch(&done); |
| 5574 | |
| 5575 | // Double value is >= 255, return 255. |
| 5576 | bind(&above_zero); |
| 5577 | Move(temp_double_reg, 255.0); |
| 5578 | BranchF(&in_bounds, NULL, le, input_reg, temp_double_reg); |
| 5579 | li(result_reg, Operand(255)); |
| 5580 | Branch(&done); |
| 5581 | |
| 5582 | // In 0-255 range, round and truncate. |
| 5583 | bind(&in_bounds); |
yangguo@chromium.org | 46839fb | 2012-08-28 09:06:19 +0000 | [diff] [blame] | 5584 | cvt_w_d(temp_double_reg, input_reg); |
erik.corry@gmail.com | c3b670f | 2011-10-05 21:44:48 +0000 | [diff] [blame] | 5585 | mfc1(result_reg, temp_double_reg); |
| 5586 | bind(&done); |
| 5587 | } |
| 5588 | |
| 5589 | |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 5590 | void MacroAssembler::TestJSArrayForAllocationMemento( |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5591 | Register receiver_reg, |
| 5592 | Register scratch_reg, |
mstarzinger@chromium.org | b4968be | 2013-10-16 09:00:56 +0000 | [diff] [blame] | 5593 | Label* no_memento_found, |
hpayer@chromium.org | 7c3372b | 2013-02-13 17:26:04 +0000 | [diff] [blame] | 5594 | Condition cond, |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 5595 | Label* allocation_memento_present) { |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5596 | ExternalReference new_space_start = |
| 5597 | ExternalReference::new_space_start(isolate()); |
| 5598 | ExternalReference new_space_allocation_top = |
| 5599 | ExternalReference::new_space_allocation_top_address(isolate()); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 5600 | Addu(scratch_reg, receiver_reg, |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 5601 | Operand(JSArray::kSize + AllocationMemento::kSize - kHeapObjectTag)); |
mstarzinger@chromium.org | b4968be | 2013-10-16 09:00:56 +0000 | [diff] [blame] | 5602 | Branch(no_memento_found, lt, scratch_reg, Operand(new_space_start)); |
mvstanton@chromium.org | 6bec009 | 2013-01-23 13:46:53 +0000 | [diff] [blame] | 5603 | li(at, Operand(new_space_allocation_top)); |
| 5604 | lw(at, MemOperand(at)); |
mstarzinger@chromium.org | b4968be | 2013-10-16 09:00:56 +0000 | [diff] [blame] | 5605 | Branch(no_memento_found, gt, scratch_reg, Operand(at)); |
jkummerow@chromium.org | ba72ec8 | 2013-07-22 09:21:20 +0000 | [diff] [blame] | 5606 | lw(scratch_reg, MemOperand(scratch_reg, -AllocationMemento::kSize)); |
mstarzinger@chromium.org | b4968be | 2013-10-16 09:00:56 +0000 | [diff] [blame] | 5607 | if (allocation_memento_present) { |
| 5608 | Branch(allocation_memento_present, cond, scratch_reg, |
| 5609 | Operand(isolate()->factory()->allocation_memento_map())); |
| 5610 | } |
jkummerow@chromium.org | 59297c7 | 2013-01-09 16:32:23 +0000 | [diff] [blame] | 5611 | } |
| 5612 | |
| 5613 | |
jkummerow@chromium.org | 8fa5bd9 | 2013-09-02 11:45:09 +0000 | [diff] [blame] | 5614 | Register GetRegisterThatIsNotOneOf(Register reg1, |
| 5615 | Register reg2, |
| 5616 | Register reg3, |
| 5617 | Register reg4, |
| 5618 | Register reg5, |
| 5619 | Register reg6) { |
| 5620 | RegList regs = 0; |
| 5621 | if (reg1.is_valid()) regs |= reg1.bit(); |
| 5622 | if (reg2.is_valid()) regs |= reg2.bit(); |
| 5623 | if (reg3.is_valid()) regs |= reg3.bit(); |
| 5624 | if (reg4.is_valid()) regs |= reg4.bit(); |
| 5625 | if (reg5.is_valid()) regs |= reg5.bit(); |
| 5626 | if (reg6.is_valid()) regs |= reg6.bit(); |
| 5627 | |
| 5628 | for (int i = 0; i < Register::NumAllocatableRegisters(); i++) { |
| 5629 | Register candidate = Register::FromAllocationIndex(i); |
| 5630 | if (regs & candidate.bit()) continue; |
| 5631 | return candidate; |
| 5632 | } |
| 5633 | UNREACHABLE(); |
| 5634 | return no_reg; |
| 5635 | } |
| 5636 | |
| 5637 | |
machenbach@chromium.org | e8412be | 2013-11-08 10:23:52 +0000 | [diff] [blame] | 5638 | void MacroAssembler::JumpIfDictionaryInPrototypeChain( |
| 5639 | Register object, |
| 5640 | Register scratch0, |
| 5641 | Register scratch1, |
| 5642 | Label* found) { |
| 5643 | ASSERT(!scratch1.is(scratch0)); |
| 5644 | Factory* factory = isolate()->factory(); |
| 5645 | Register current = scratch0; |
| 5646 | Label loop_again; |
| 5647 | |
| 5648 | // Scratch contained elements pointer. |
| 5649 | Move(current, object); |
| 5650 | |
| 5651 | // Loop based on the map going up the prototype chain. |
| 5652 | bind(&loop_again); |
| 5653 | lw(current, FieldMemOperand(current, HeapObject::kMapOffset)); |
| 5654 | lb(scratch1, FieldMemOperand(current, Map::kBitField2Offset)); |
| 5655 | Ext(scratch1, scratch1, Map::kElementsKindShift, Map::kElementsKindBitCount); |
| 5656 | Branch(found, eq, scratch1, Operand(DICTIONARY_ELEMENTS)); |
| 5657 | lw(current, FieldMemOperand(current, Map::kPrototypeOffset)); |
| 5658 | Branch(&loop_again, ne, current, Operand(factory->null_value())); |
| 5659 | } |
| 5660 | |
| 5661 | |
rossberg@chromium.org | b4b2aa6 | 2011-10-13 09:49:59 +0000 | [diff] [blame] | 5662 | bool AreAliased(Register r1, Register r2, Register r3, Register r4) { |
| 5663 | if (r1.is(r2)) return true; |
| 5664 | if (r1.is(r3)) return true; |
| 5665 | if (r1.is(r4)) return true; |
| 5666 | if (r2.is(r3)) return true; |
| 5667 | if (r2.is(r4)) return true; |
| 5668 | if (r3.is(r4)) return true; |
| 5669 | return false; |
| 5670 | } |
| 5671 | |
| 5672 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5673 | CodePatcher::CodePatcher(byte* address, int instructions) |
| 5674 | : address_(address), |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5675 | size_(instructions * Assembler::kInstrSize), |
jkummerow@chromium.org | 212d964 | 2012-05-11 15:02:09 +0000 | [diff] [blame] | 5676 | masm_(NULL, address, size_ + Assembler::kGap) { |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5677 | // Create a new macro assembler pointing to the address of the code to patch. |
| 5678 | // The size is adjusted with kGap on order for the assembler to generate size |
| 5679 | // bytes of instructions without failing with buffer size constraints. |
| 5680 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 5681 | } |
| 5682 | |
| 5683 | |
| 5684 | CodePatcher::~CodePatcher() { |
| 5685 | // Indicate that code has changed. |
| 5686 | CPU::FlushICache(address_, size_); |
| 5687 | |
| 5688 | // Check that the code was patched as expected. |
| 5689 | ASSERT(masm_.pc_ == address_ + size_); |
| 5690 | ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 5691 | } |
| 5692 | |
| 5693 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 5694 | void CodePatcher::Emit(Instr instr) { |
| 5695 | masm()->emit(instr); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5696 | } |
| 5697 | |
| 5698 | |
| 5699 | void CodePatcher::Emit(Address addr) { |
| 5700 | masm()->emit(reinterpret_cast<Instr>(addr)); |
| 5701 | } |
| 5702 | |
| 5703 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 5704 | void CodePatcher::ChangeBranchCondition(Condition cond) { |
| 5705 | Instr instr = Assembler::instr_at(masm_.pc_); |
| 5706 | ASSERT(Assembler::IsBranch(instr)); |
| 5707 | uint32_t opcode = Assembler::GetOpcodeField(instr); |
| 5708 | // Currently only the 'eq' and 'ne' cond values are supported and the simple |
| 5709 | // branch instructions (with opcode being the branch type). |
| 5710 | // There are some special cases (see Assembler::IsBranch()) so extending this |
| 5711 | // would be tricky. |
| 5712 | ASSERT(opcode == BEQ || |
| 5713 | opcode == BNE || |
| 5714 | opcode == BLEZ || |
| 5715 | opcode == BGTZ || |
| 5716 | opcode == BEQL || |
| 5717 | opcode == BNEL || |
| 5718 | opcode == BLEZL || |
| 5719 | opcode == BGTZL); |
| 5720 | opcode = (cond == eq) ? BEQ : BNE; |
| 5721 | instr = (instr & ~kOpcodeMask) | opcode; |
| 5722 | masm_.emit(instr); |
| 5723 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5724 | |
| 5725 | |
machenbach@chromium.org | 69f64b1 | 2014-03-20 01:04:55 +0000 | [diff] [blame] | 5726 | void MacroAssembler::TruncatingDiv(Register result, |
| 5727 | Register dividend, |
| 5728 | int32_t divisor) { |
machenbach@chromium.org | bcc3672 | 2014-03-11 07:52:26 +0000 | [diff] [blame] | 5729 | ASSERT(!dividend.is(result)); |
| 5730 | ASSERT(!dividend.is(at)); |
| 5731 | ASSERT(!result.is(at)); |
| 5732 | MultiplierAndShift ms(divisor); |
| 5733 | li(at, Operand(ms.multiplier())); |
| 5734 | Mult(dividend, Operand(at)); |
| 5735 | mfhi(result); |
| 5736 | if (divisor > 0 && ms.multiplier() < 0) { |
| 5737 | Addu(result, result, Operand(dividend)); |
| 5738 | } |
| 5739 | if (divisor < 0 && ms.multiplier() > 0) { |
| 5740 | Subu(result, result, Operand(dividend)); |
| 5741 | } |
machenbach@chromium.org | 69f64b1 | 2014-03-20 01:04:55 +0000 | [diff] [blame] | 5742 | if (ms.shift() > 0) sra(result, result, ms.shift()); |
| 5743 | srl(at, dividend, 31); |
| 5744 | Addu(result, result, Operand(at)); |
machenbach@chromium.org | bcc3672 | 2014-03-11 07:52:26 +0000 | [diff] [blame] | 5745 | } |
| 5746 | |
| 5747 | |
ager@chromium.org | 5c83825 | 2010-02-19 08:53:10 +0000 | [diff] [blame] | 5748 | } } // namespace v8::internal |
| 5749 | |
erik.corry@gmail.com | 9dfbea4 | 2010-05-21 12:58:28 +0000 | [diff] [blame] | 5750 | #endif // V8_TARGET_ARCH_MIPS |