lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #if defined(V8_TARGET_ARCH_MIPS) |
| 31 | |
| 32 | #include "bootstrapper.h" |
| 33 | #include "code-stubs.h" |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 34 | #include "codegen.h" |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 35 | #include "regexp-macro-assembler.h" |
| 36 | |
| 37 | namespace v8 { |
| 38 | namespace internal { |
| 39 | |
| 40 | |
| 41 | #define __ ACCESS_MASM(masm) |
| 42 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 43 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 44 | Label* slow, |
| 45 | Condition cc, |
| 46 | bool never_nan_nan); |
| 47 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 48 | Register lhs, |
| 49 | Register rhs, |
| 50 | Label* rhs_not_nan, |
| 51 | Label* slow, |
| 52 | bool strict); |
| 53 | static void EmitTwoNonNanDoubleComparison(MacroAssembler* masm, Condition cc); |
| 54 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 55 | Register lhs, |
| 56 | Register rhs); |
| 57 | |
| 58 | |
| 59 | // Check if the operand is a heap number. |
| 60 | static void EmitCheckForHeapNumber(MacroAssembler* masm, Register operand, |
| 61 | Register scratch1, Register scratch2, |
| 62 | Label* not_a_heap_number) { |
| 63 | __ lw(scratch1, FieldMemOperand(operand, HeapObject::kMapOffset)); |
| 64 | __ LoadRoot(scratch2, Heap::kHeapNumberMapRootIndex); |
| 65 | __ Branch(not_a_heap_number, ne, scratch1, Operand(scratch2)); |
| 66 | } |
| 67 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 68 | |
| 69 | void ToNumberStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 70 | // The ToNumber stub takes one argument in a0. |
| 71 | Label check_heap_number, call_builtin; |
| 72 | __ JumpIfNotSmi(a0, &check_heap_number); |
| 73 | __ mov(v0, a0); |
| 74 | __ Ret(); |
| 75 | |
| 76 | __ bind(&check_heap_number); |
| 77 | EmitCheckForHeapNumber(masm, a0, a1, t0, &call_builtin); |
| 78 | __ mov(v0, a0); |
| 79 | __ Ret(); |
| 80 | |
| 81 | __ bind(&call_builtin); |
| 82 | __ push(a0); |
| 83 | __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_FUNCTION); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | |
| 87 | void FastNewClosureStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 88 | // Create a new closure from the given function info in new |
| 89 | // space. Set the context to the current context in cp. |
| 90 | Label gc; |
| 91 | |
| 92 | // Pop the function info from the stack. |
| 93 | __ pop(a3); |
| 94 | |
| 95 | // Attempt to allocate new JSFunction in new space. |
| 96 | __ AllocateInNewSpace(JSFunction::kSize, |
| 97 | v0, |
| 98 | a1, |
| 99 | a2, |
| 100 | &gc, |
| 101 | TAG_OBJECT); |
| 102 | |
| 103 | int map_index = strict_mode_ == kStrictMode |
| 104 | ? Context::STRICT_MODE_FUNCTION_MAP_INDEX |
| 105 | : Context::FUNCTION_MAP_INDEX; |
| 106 | |
| 107 | // Compute the function map in the current global context and set that |
| 108 | // as the map of the allocated object. |
| 109 | __ lw(a2, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 110 | __ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalContextOffset)); |
| 111 | __ lw(a2, MemOperand(a2, Context::SlotOffset(map_index))); |
| 112 | __ sw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); |
| 113 | |
| 114 | // Initialize the rest of the function. We don't have to update the |
| 115 | // write barrier because the allocated object is in new space. |
| 116 | __ LoadRoot(a1, Heap::kEmptyFixedArrayRootIndex); |
| 117 | __ LoadRoot(a2, Heap::kTheHoleValueRootIndex); |
| 118 | __ LoadRoot(t0, Heap::kUndefinedValueRootIndex); |
| 119 | __ sw(a1, FieldMemOperand(v0, JSObject::kPropertiesOffset)); |
| 120 | __ sw(a1, FieldMemOperand(v0, JSObject::kElementsOffset)); |
| 121 | __ sw(a2, FieldMemOperand(v0, JSFunction::kPrototypeOrInitialMapOffset)); |
| 122 | __ sw(a3, FieldMemOperand(v0, JSFunction::kSharedFunctionInfoOffset)); |
| 123 | __ sw(cp, FieldMemOperand(v0, JSFunction::kContextOffset)); |
| 124 | __ sw(a1, FieldMemOperand(v0, JSFunction::kLiteralsOffset)); |
| 125 | __ sw(t0, FieldMemOperand(v0, JSFunction::kNextFunctionLinkOffset)); |
| 126 | |
| 127 | // Initialize the code pointer in the function to be the one |
| 128 | // found in the shared function info object. |
| 129 | __ lw(a3, FieldMemOperand(a3, SharedFunctionInfo::kCodeOffset)); |
| 130 | __ Addu(a3, a3, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 131 | __ sw(a3, FieldMemOperand(v0, JSFunction::kCodeEntryOffset)); |
| 132 | |
| 133 | // Return result. The argument function info has been popped already. |
| 134 | __ Ret(); |
| 135 | |
| 136 | // Create a new closure through the slower runtime call. |
| 137 | __ bind(&gc); |
| 138 | __ LoadRoot(t0, Heap::kFalseValueRootIndex); |
| 139 | __ Push(cp, a3, t0); |
| 140 | __ TailCallRuntime(Runtime::kNewClosure, 3, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | |
| 144 | void FastNewContextStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 145 | // Try to allocate the context in new space. |
| 146 | Label gc; |
| 147 | int length = slots_ + Context::MIN_CONTEXT_SLOTS; |
| 148 | |
| 149 | // Attempt to allocate the context in new space. |
| 150 | __ AllocateInNewSpace(FixedArray::SizeFor(length), |
| 151 | v0, |
| 152 | a1, |
| 153 | a2, |
| 154 | &gc, |
| 155 | TAG_OBJECT); |
| 156 | |
| 157 | // Load the function from the stack. |
| 158 | __ lw(a3, MemOperand(sp, 0)); |
| 159 | |
| 160 | // Setup the object header. |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 161 | __ LoadRoot(a2, Heap::kFunctionContextMapRootIndex); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 162 | __ sw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); |
| 163 | __ li(a2, Operand(Smi::FromInt(length))); |
| 164 | __ sw(a2, FieldMemOperand(v0, FixedArray::kLengthOffset)); |
| 165 | |
| 166 | // Setup the fixed slots. |
| 167 | __ li(a1, Operand(Smi::FromInt(0))); |
| 168 | __ sw(a3, MemOperand(v0, Context::SlotOffset(Context::CLOSURE_INDEX))); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 169 | __ sw(cp, MemOperand(v0, Context::SlotOffset(Context::PREVIOUS_INDEX))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 170 | __ sw(a1, MemOperand(v0, Context::SlotOffset(Context::EXTENSION_INDEX))); |
| 171 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 172 | // Copy the global object from the previous context. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 173 | __ lw(a1, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 174 | __ sw(a1, MemOperand(v0, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 175 | |
| 176 | // Initialize the rest of the slots to undefined. |
| 177 | __ LoadRoot(a1, Heap::kUndefinedValueRootIndex); |
| 178 | for (int i = Context::MIN_CONTEXT_SLOTS; i < length; i++) { |
| 179 | __ sw(a1, MemOperand(v0, Context::SlotOffset(i))); |
| 180 | } |
| 181 | |
| 182 | // Remove the on-stack argument and return. |
| 183 | __ mov(cp, v0); |
| 184 | __ Pop(); |
| 185 | __ Ret(); |
| 186 | |
| 187 | // Need to collect. Call into runtime system. |
| 188 | __ bind(&gc); |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 189 | __ TailCallRuntime(Runtime::kNewFunctionContext, 1, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | |
| 193 | void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 194 | // Stack layout on entry: |
| 195 | // [sp]: constant elements. |
| 196 | // [sp + kPointerSize]: literal index. |
| 197 | // [sp + (2 * kPointerSize)]: literals array. |
| 198 | |
| 199 | // All sizes here are multiples of kPointerSize. |
| 200 | int elements_size = (length_ > 0) ? FixedArray::SizeFor(length_) : 0; |
| 201 | int size = JSArray::kSize + elements_size; |
| 202 | |
| 203 | // Load boilerplate object into r3 and check if we need to create a |
| 204 | // boilerplate. |
| 205 | Label slow_case; |
| 206 | __ lw(a3, MemOperand(sp, 2 * kPointerSize)); |
| 207 | __ lw(a0, MemOperand(sp, 1 * kPointerSize)); |
| 208 | __ Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 209 | __ sll(t0, a0, kPointerSizeLog2 - kSmiTagSize); |
| 210 | __ Addu(t0, a3, t0); |
| 211 | __ lw(a3, MemOperand(t0)); |
| 212 | __ LoadRoot(t1, Heap::kUndefinedValueRootIndex); |
| 213 | __ Branch(&slow_case, eq, a3, Operand(t1)); |
| 214 | |
| 215 | if (FLAG_debug_code) { |
| 216 | const char* message; |
| 217 | Heap::RootListIndex expected_map_index; |
| 218 | if (mode_ == CLONE_ELEMENTS) { |
| 219 | message = "Expected (writable) fixed array"; |
| 220 | expected_map_index = Heap::kFixedArrayMapRootIndex; |
| 221 | } else { |
| 222 | ASSERT(mode_ == COPY_ON_WRITE_ELEMENTS); |
| 223 | message = "Expected copy-on-write fixed array"; |
| 224 | expected_map_index = Heap::kFixedCOWArrayMapRootIndex; |
| 225 | } |
| 226 | __ push(a3); |
| 227 | __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset)); |
| 228 | __ lw(a3, FieldMemOperand(a3, HeapObject::kMapOffset)); |
| 229 | __ LoadRoot(at, expected_map_index); |
| 230 | __ Assert(eq, message, a3, Operand(at)); |
| 231 | __ pop(a3); |
| 232 | } |
| 233 | |
| 234 | // Allocate both the JS array and the elements array in one big |
| 235 | // allocation. This avoids multiple limit checks. |
| 236 | // Return new object in v0. |
| 237 | __ AllocateInNewSpace(size, |
| 238 | v0, |
| 239 | a1, |
| 240 | a2, |
| 241 | &slow_case, |
| 242 | TAG_OBJECT); |
| 243 | |
| 244 | // Copy the JS array part. |
| 245 | for (int i = 0; i < JSArray::kSize; i += kPointerSize) { |
| 246 | if ((i != JSArray::kElementsOffset) || (length_ == 0)) { |
| 247 | __ lw(a1, FieldMemOperand(a3, i)); |
| 248 | __ sw(a1, FieldMemOperand(v0, i)); |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | if (length_ > 0) { |
| 253 | // Get hold of the elements array of the boilerplate and setup the |
| 254 | // elements pointer in the resulting object. |
| 255 | __ lw(a3, FieldMemOperand(a3, JSArray::kElementsOffset)); |
| 256 | __ Addu(a2, v0, Operand(JSArray::kSize)); |
| 257 | __ sw(a2, FieldMemOperand(v0, JSArray::kElementsOffset)); |
| 258 | |
| 259 | // Copy the elements array. |
| 260 | __ CopyFields(a2, a3, a1.bit(), elements_size / kPointerSize); |
| 261 | } |
| 262 | |
| 263 | // Return and remove the on-stack parameters. |
| 264 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 265 | __ Ret(); |
| 266 | |
| 267 | __ bind(&slow_case); |
| 268 | __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | |
| 272 | // Takes a Smi and converts to an IEEE 64 bit floating point value in two |
| 273 | // registers. The format is 1 sign bit, 11 exponent bits (biased 1023) and |
| 274 | // 52 fraction bits (20 in the first word, 32 in the second). Zeros is a |
| 275 | // scratch register. Destroys the source register. No GC occurs during this |
| 276 | // stub so you don't have to set up the frame. |
| 277 | class ConvertToDoubleStub : public CodeStub { |
| 278 | public: |
| 279 | ConvertToDoubleStub(Register result_reg_1, |
| 280 | Register result_reg_2, |
| 281 | Register source_reg, |
| 282 | Register scratch_reg) |
| 283 | : result1_(result_reg_1), |
| 284 | result2_(result_reg_2), |
| 285 | source_(source_reg), |
| 286 | zeros_(scratch_reg) { } |
| 287 | |
| 288 | private: |
| 289 | Register result1_; |
| 290 | Register result2_; |
| 291 | Register source_; |
| 292 | Register zeros_; |
| 293 | |
| 294 | // Minor key encoding in 16 bits. |
| 295 | class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 296 | class OpBits: public BitField<Token::Value, 2, 14> {}; |
| 297 | |
| 298 | Major MajorKey() { return ConvertToDouble; } |
| 299 | int MinorKey() { |
| 300 | // Encode the parameters in a unique 16 bit value. |
| 301 | return result1_.code() + |
| 302 | (result2_.code() << 4) + |
| 303 | (source_.code() << 8) + |
| 304 | (zeros_.code() << 12); |
| 305 | } |
| 306 | |
| 307 | void Generate(MacroAssembler* masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 308 | }; |
| 309 | |
| 310 | |
| 311 | void ConvertToDoubleStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 312 | #ifndef BIG_ENDIAN_FLOATING_POINT |
| 313 | Register exponent = result1_; |
| 314 | Register mantissa = result2_; |
| 315 | #else |
| 316 | Register exponent = result2_; |
| 317 | Register mantissa = result1_; |
| 318 | #endif |
| 319 | Label not_special; |
| 320 | // Convert from Smi to integer. |
| 321 | __ sra(source_, source_, kSmiTagSize); |
| 322 | // Move sign bit from source to destination. This works because the sign bit |
| 323 | // in the exponent word of the double has the same position and polarity as |
| 324 | // the 2's complement sign bit in a Smi. |
| 325 | STATIC_ASSERT(HeapNumber::kSignMask == 0x80000000u); |
| 326 | __ And(exponent, source_, Operand(HeapNumber::kSignMask)); |
| 327 | // Subtract from 0 if source was negative. |
| 328 | __ subu(at, zero_reg, source_); |
| 329 | __ movn(source_, at, exponent); |
| 330 | |
| 331 | // We have -1, 0 or 1, which we treat specially. Register source_ contains |
| 332 | // absolute value: it is either equal to 1 (special case of -1 and 1), |
| 333 | // greater than 1 (not a special case) or less than 1 (special case of 0). |
| 334 | __ Branch(¬_special, gt, source_, Operand(1)); |
| 335 | |
| 336 | // For 1 or -1 we need to or in the 0 exponent (biased to 1023). |
| 337 | static const uint32_t exponent_word_for_1 = |
| 338 | HeapNumber::kExponentBias << HeapNumber::kExponentShift; |
| 339 | // Safe to use 'at' as dest reg here. |
| 340 | __ Or(at, exponent, Operand(exponent_word_for_1)); |
| 341 | __ movn(exponent, at, source_); // Write exp when source not 0. |
| 342 | // 1, 0 and -1 all have 0 for the second word. |
| 343 | __ mov(mantissa, zero_reg); |
| 344 | __ Ret(); |
| 345 | |
| 346 | __ bind(¬_special); |
| 347 | // Count leading zeros. |
| 348 | // Gets the wrong answer for 0, but we already checked for that case above. |
| 349 | __ clz(zeros_, source_); |
| 350 | // Compute exponent and or it into the exponent register. |
| 351 | // We use mantissa as a scratch register here. |
| 352 | __ li(mantissa, Operand(31 + HeapNumber::kExponentBias)); |
| 353 | __ subu(mantissa, mantissa, zeros_); |
| 354 | __ sll(mantissa, mantissa, HeapNumber::kExponentShift); |
| 355 | __ Or(exponent, exponent, mantissa); |
| 356 | |
| 357 | // Shift up the source chopping the top bit off. |
| 358 | __ Addu(zeros_, zeros_, Operand(1)); |
| 359 | // This wouldn't work for 1.0 or -1.0 as the shift would be 32 which means 0. |
| 360 | __ sllv(source_, source_, zeros_); |
| 361 | // Compute lower part of fraction (last 12 bits). |
| 362 | __ sll(mantissa, source_, HeapNumber::kMantissaBitsInTopWord); |
| 363 | // And the top (top 20 bits). |
| 364 | __ srl(source_, source_, 32 - HeapNumber::kMantissaBitsInTopWord); |
| 365 | __ or_(exponent, exponent, source_); |
| 366 | |
| 367 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 371 | void FloatingPointHelper::LoadSmis(MacroAssembler* masm, |
| 372 | FloatingPointHelper::Destination destination, |
| 373 | Register scratch1, |
| 374 | Register scratch2) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 375 | if (CpuFeatures::IsSupported(FPU)) { |
| 376 | CpuFeatures::Scope scope(FPU); |
| 377 | __ sra(scratch1, a0, kSmiTagSize); |
| 378 | __ mtc1(scratch1, f14); |
| 379 | __ cvt_d_w(f14, f14); |
| 380 | __ sra(scratch1, a1, kSmiTagSize); |
| 381 | __ mtc1(scratch1, f12); |
| 382 | __ cvt_d_w(f12, f12); |
| 383 | if (destination == kCoreRegisters) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 384 | __ Move(a2, a3, f14); |
| 385 | __ Move(a0, a1, f12); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 386 | } |
| 387 | } else { |
| 388 | ASSERT(destination == kCoreRegisters); |
| 389 | // Write Smi from a0 to a3 and a2 in double format. |
| 390 | __ mov(scratch1, a0); |
| 391 | ConvertToDoubleStub stub1(a3, a2, scratch1, scratch2); |
| 392 | __ push(ra); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 393 | __ Call(stub1.GetCode()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 394 | // Write Smi from a1 to a1 and a0 in double format. |
| 395 | __ mov(scratch1, a1); |
| 396 | ConvertToDoubleStub stub2(a1, a0, scratch1, scratch2); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 397 | __ Call(stub2.GetCode()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 398 | __ pop(ra); |
| 399 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | |
| 403 | void FloatingPointHelper::LoadOperands( |
| 404 | MacroAssembler* masm, |
| 405 | FloatingPointHelper::Destination destination, |
| 406 | Register heap_number_map, |
| 407 | Register scratch1, |
| 408 | Register scratch2, |
| 409 | Label* slow) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 410 | |
| 411 | // Load right operand (a0) to f12 or a2/a3. |
| 412 | LoadNumber(masm, destination, |
| 413 | a0, f14, a2, a3, heap_number_map, scratch1, scratch2, slow); |
| 414 | |
| 415 | // Load left operand (a1) to f14 or a0/a1. |
| 416 | LoadNumber(masm, destination, |
| 417 | a1, f12, a0, a1, heap_number_map, scratch1, scratch2, slow); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | |
| 421 | void FloatingPointHelper::LoadNumber(MacroAssembler* masm, |
| 422 | Destination destination, |
| 423 | Register object, |
| 424 | FPURegister dst, |
| 425 | Register dst1, |
| 426 | Register dst2, |
| 427 | Register heap_number_map, |
| 428 | Register scratch1, |
| 429 | Register scratch2, |
| 430 | Label* not_number) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 431 | if (FLAG_debug_code) { |
| 432 | __ AbortIfNotRootValue(heap_number_map, |
| 433 | Heap::kHeapNumberMapRootIndex, |
| 434 | "HeapNumberMap register clobbered."); |
| 435 | } |
| 436 | |
| 437 | Label is_smi, done; |
| 438 | |
| 439 | __ JumpIfSmi(object, &is_smi); |
| 440 | __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_number); |
| 441 | |
| 442 | // Handle loading a double from a heap number. |
| 443 | if (CpuFeatures::IsSupported(FPU) && |
| 444 | destination == kFPURegisters) { |
| 445 | CpuFeatures::Scope scope(FPU); |
| 446 | // Load the double from tagged HeapNumber to double register. |
| 447 | |
| 448 | // ARM uses a workaround here because of the unaligned HeapNumber |
| 449 | // kValueOffset. On MIPS this workaround is built into ldc1 so there's no |
| 450 | // point in generating even more instructions. |
| 451 | __ ldc1(dst, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 452 | } else { |
| 453 | ASSERT(destination == kCoreRegisters); |
| 454 | // Load the double from heap number to dst1 and dst2 in double format. |
| 455 | __ lw(dst1, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 456 | __ lw(dst2, FieldMemOperand(object, |
| 457 | HeapNumber::kValueOffset + kPointerSize)); |
| 458 | } |
| 459 | __ Branch(&done); |
| 460 | |
| 461 | // Handle loading a double from a smi. |
| 462 | __ bind(&is_smi); |
| 463 | if (CpuFeatures::IsSupported(FPU)) { |
| 464 | CpuFeatures::Scope scope(FPU); |
| 465 | // Convert smi to double using FPU instructions. |
| 466 | __ SmiUntag(scratch1, object); |
| 467 | __ mtc1(scratch1, dst); |
| 468 | __ cvt_d_w(dst, dst); |
| 469 | if (destination == kCoreRegisters) { |
| 470 | // Load the converted smi to dst1 and dst2 in double format. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 471 | __ Move(dst1, dst2, dst); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 472 | } |
| 473 | } else { |
| 474 | ASSERT(destination == kCoreRegisters); |
| 475 | // Write smi to dst1 and dst2 double format. |
| 476 | __ mov(scratch1, object); |
| 477 | ConvertToDoubleStub stub(dst2, dst1, scratch1, scratch2); |
| 478 | __ push(ra); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 479 | __ Call(stub.GetCode()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 480 | __ pop(ra); |
| 481 | } |
| 482 | |
| 483 | __ bind(&done); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 487 | void FloatingPointHelper::ConvertNumberToInt32(MacroAssembler* masm, |
| 488 | Register object, |
| 489 | Register dst, |
| 490 | Register heap_number_map, |
| 491 | Register scratch1, |
| 492 | Register scratch2, |
| 493 | Register scratch3, |
| 494 | FPURegister double_scratch, |
| 495 | Label* not_number) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 496 | if (FLAG_debug_code) { |
| 497 | __ AbortIfNotRootValue(heap_number_map, |
| 498 | Heap::kHeapNumberMapRootIndex, |
| 499 | "HeapNumberMap register clobbered."); |
| 500 | } |
| 501 | Label is_smi; |
| 502 | Label done; |
| 503 | Label not_in_int32_range; |
| 504 | |
| 505 | __ JumpIfSmi(object, &is_smi); |
| 506 | __ lw(scratch1, FieldMemOperand(object, HeapNumber::kMapOffset)); |
| 507 | __ Branch(not_number, ne, scratch1, Operand(heap_number_map)); |
| 508 | __ ConvertToInt32(object, |
| 509 | dst, |
| 510 | scratch1, |
| 511 | scratch2, |
| 512 | double_scratch, |
| 513 | ¬_in_int32_range); |
| 514 | __ jmp(&done); |
| 515 | |
| 516 | __ bind(¬_in_int32_range); |
| 517 | __ lw(scratch1, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 518 | __ lw(scratch2, FieldMemOperand(object, HeapNumber::kMantissaOffset)); |
| 519 | |
| 520 | __ EmitOutOfInt32RangeTruncate(dst, |
| 521 | scratch1, |
| 522 | scratch2, |
| 523 | scratch3); |
| 524 | |
| 525 | __ jmp(&done); |
| 526 | |
| 527 | __ bind(&is_smi); |
| 528 | __ SmiUntag(dst, object); |
| 529 | __ bind(&done); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 530 | } |
| 531 | |
| 532 | |
| 533 | void FloatingPointHelper::ConvertIntToDouble(MacroAssembler* masm, |
| 534 | Register int_scratch, |
| 535 | Destination destination, |
| 536 | FPURegister double_dst, |
| 537 | Register dst1, |
| 538 | Register dst2, |
| 539 | Register scratch2, |
| 540 | FPURegister single_scratch) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 541 | ASSERT(!int_scratch.is(scratch2)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 542 | ASSERT(!int_scratch.is(dst1)); |
| 543 | ASSERT(!int_scratch.is(dst2)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 544 | |
| 545 | Label done; |
| 546 | |
| 547 | if (CpuFeatures::IsSupported(FPU)) { |
| 548 | CpuFeatures::Scope scope(FPU); |
| 549 | __ mtc1(int_scratch, single_scratch); |
| 550 | __ cvt_d_w(double_dst, single_scratch); |
| 551 | if (destination == kCoreRegisters) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 552 | __ Move(dst1, dst2, double_dst); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 553 | } |
| 554 | } else { |
| 555 | Label fewer_than_20_useful_bits; |
| 556 | // Expected output: |
| 557 | // | dst2 | dst1 | |
| 558 | // | s | exp | mantissa | |
| 559 | |
| 560 | // Check for zero. |
| 561 | __ mov(dst2, int_scratch); |
| 562 | __ mov(dst1, int_scratch); |
| 563 | __ Branch(&done, eq, int_scratch, Operand(zero_reg)); |
| 564 | |
| 565 | // Preload the sign of the value. |
| 566 | __ And(dst2, int_scratch, Operand(HeapNumber::kSignMask)); |
| 567 | // Get the absolute value of the object (as an unsigned integer). |
| 568 | Label skip_sub; |
| 569 | __ Branch(&skip_sub, ge, dst2, Operand(zero_reg)); |
| 570 | __ Subu(int_scratch, zero_reg, int_scratch); |
| 571 | __ bind(&skip_sub); |
| 572 | |
| 573 | // Get mantisssa[51:20]. |
| 574 | |
| 575 | // Get the position of the first set bit. |
| 576 | __ clz(dst1, int_scratch); |
| 577 | __ li(scratch2, 31); |
| 578 | __ Subu(dst1, scratch2, dst1); |
| 579 | |
| 580 | // Set the exponent. |
| 581 | __ Addu(scratch2, dst1, Operand(HeapNumber::kExponentBias)); |
| 582 | __ Ins(dst2, scratch2, |
| 583 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 584 | |
| 585 | // Clear the first non null bit. |
| 586 | __ li(scratch2, Operand(1)); |
| 587 | __ sllv(scratch2, scratch2, dst1); |
| 588 | __ li(at, -1); |
| 589 | __ Xor(scratch2, scratch2, at); |
| 590 | __ And(int_scratch, int_scratch, scratch2); |
| 591 | |
| 592 | // Get the number of bits to set in the lower part of the mantissa. |
| 593 | __ Subu(scratch2, dst1, Operand(HeapNumber::kMantissaBitsInTopWord)); |
| 594 | __ Branch(&fewer_than_20_useful_bits, lt, scratch2, Operand(zero_reg)); |
| 595 | // Set the higher 20 bits of the mantissa. |
| 596 | __ srlv(at, int_scratch, scratch2); |
| 597 | __ or_(dst2, dst2, at); |
| 598 | __ li(at, 32); |
| 599 | __ subu(scratch2, at, scratch2); |
| 600 | __ sllv(dst1, int_scratch, scratch2); |
| 601 | __ Branch(&done); |
| 602 | |
| 603 | __ bind(&fewer_than_20_useful_bits); |
| 604 | __ li(at, HeapNumber::kMantissaBitsInTopWord); |
| 605 | __ subu(scratch2, at, dst1); |
| 606 | __ sllv(scratch2, int_scratch, scratch2); |
| 607 | __ Or(dst2, dst2, scratch2); |
| 608 | // Set dst1 to 0. |
| 609 | __ mov(dst1, zero_reg); |
| 610 | } |
| 611 | __ bind(&done); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | |
| 615 | void FloatingPointHelper::LoadNumberAsInt32Double(MacroAssembler* masm, |
| 616 | Register object, |
| 617 | Destination destination, |
| 618 | FPURegister double_dst, |
| 619 | Register dst1, |
| 620 | Register dst2, |
| 621 | Register heap_number_map, |
| 622 | Register scratch1, |
| 623 | Register scratch2, |
| 624 | FPURegister single_scratch, |
| 625 | Label* not_int32) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 626 | ASSERT(!scratch1.is(object) && !scratch2.is(object)); |
| 627 | ASSERT(!scratch1.is(scratch2)); |
| 628 | ASSERT(!heap_number_map.is(object) && |
| 629 | !heap_number_map.is(scratch1) && |
| 630 | !heap_number_map.is(scratch2)); |
| 631 | |
| 632 | Label done, obj_is_not_smi; |
| 633 | |
| 634 | __ JumpIfNotSmi(object, &obj_is_not_smi); |
| 635 | __ SmiUntag(scratch1, object); |
| 636 | ConvertIntToDouble(masm, scratch1, destination, double_dst, dst1, dst2, |
| 637 | scratch2, single_scratch); |
| 638 | __ Branch(&done); |
| 639 | |
| 640 | __ bind(&obj_is_not_smi); |
| 641 | if (FLAG_debug_code) { |
| 642 | __ AbortIfNotRootValue(heap_number_map, |
| 643 | Heap::kHeapNumberMapRootIndex, |
| 644 | "HeapNumberMap register clobbered."); |
| 645 | } |
| 646 | __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32); |
| 647 | |
| 648 | // Load the number. |
| 649 | if (CpuFeatures::IsSupported(FPU)) { |
| 650 | CpuFeatures::Scope scope(FPU); |
| 651 | // Load the double value. |
| 652 | __ ldc1(double_dst, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 653 | |
| 654 | // NOTE: ARM uses a MacroAssembler function here (EmitVFPTruncate). |
| 655 | // On MIPS a lot of things cannot be implemented the same way so right |
| 656 | // now it makes a lot more sense to just do things manually. |
| 657 | |
| 658 | // Save FCSR. |
| 659 | __ cfc1(scratch1, FCSR); |
| 660 | // Disable FPU exceptions. |
| 661 | __ ctc1(zero_reg, FCSR); |
| 662 | __ trunc_w_d(single_scratch, double_dst); |
| 663 | // Retrieve FCSR. |
| 664 | __ cfc1(scratch2, FCSR); |
| 665 | // Restore FCSR. |
| 666 | __ ctc1(scratch1, FCSR); |
| 667 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 668 | // Check for inexact conversion or exception. |
| 669 | __ And(scratch2, scratch2, kFCSRFlagMask); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 670 | |
| 671 | // Jump to not_int32 if the operation did not succeed. |
| 672 | __ Branch(not_int32, ne, scratch2, Operand(zero_reg)); |
| 673 | |
| 674 | if (destination == kCoreRegisters) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 675 | __ Move(dst1, dst2, double_dst); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | } else { |
| 679 | ASSERT(!scratch1.is(object) && !scratch2.is(object)); |
| 680 | // Load the double value in the destination registers. |
| 681 | __ lw(dst2, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 682 | __ lw(dst1, FieldMemOperand(object, HeapNumber::kMantissaOffset)); |
| 683 | |
| 684 | // Check for 0 and -0. |
| 685 | __ And(scratch1, dst1, Operand(~HeapNumber::kSignMask)); |
| 686 | __ Or(scratch1, scratch1, Operand(dst2)); |
| 687 | __ Branch(&done, eq, scratch1, Operand(zero_reg)); |
| 688 | |
| 689 | // Check that the value can be exactly represented by a 32-bit integer. |
| 690 | // Jump to not_int32 if that's not the case. |
| 691 | DoubleIs32BitInteger(masm, dst1, dst2, scratch1, scratch2, not_int32); |
| 692 | |
| 693 | // dst1 and dst2 were trashed. Reload the double value. |
| 694 | __ lw(dst2, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 695 | __ lw(dst1, FieldMemOperand(object, HeapNumber::kMantissaOffset)); |
| 696 | } |
| 697 | |
| 698 | __ bind(&done); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | |
| 702 | void FloatingPointHelper::LoadNumberAsInt32(MacroAssembler* masm, |
| 703 | Register object, |
| 704 | Register dst, |
| 705 | Register heap_number_map, |
| 706 | Register scratch1, |
| 707 | Register scratch2, |
| 708 | Register scratch3, |
| 709 | FPURegister double_scratch, |
| 710 | Label* not_int32) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 711 | ASSERT(!dst.is(object)); |
| 712 | ASSERT(!scratch1.is(object) && !scratch2.is(object) && !scratch3.is(object)); |
| 713 | ASSERT(!scratch1.is(scratch2) && |
| 714 | !scratch1.is(scratch3) && |
| 715 | !scratch2.is(scratch3)); |
| 716 | |
| 717 | Label done; |
| 718 | |
| 719 | // Untag the object into the destination register. |
| 720 | __ SmiUntag(dst, object); |
| 721 | // Just return if the object is a smi. |
| 722 | __ JumpIfSmi(object, &done); |
| 723 | |
| 724 | if (FLAG_debug_code) { |
| 725 | __ AbortIfNotRootValue(heap_number_map, |
| 726 | Heap::kHeapNumberMapRootIndex, |
| 727 | "HeapNumberMap register clobbered."); |
| 728 | } |
| 729 | __ JumpIfNotHeapNumber(object, heap_number_map, scratch1, not_int32); |
| 730 | |
| 731 | // Object is a heap number. |
| 732 | // Convert the floating point value to a 32-bit integer. |
| 733 | if (CpuFeatures::IsSupported(FPU)) { |
| 734 | CpuFeatures::Scope scope(FPU); |
| 735 | // Load the double value. |
| 736 | __ ldc1(double_scratch, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 737 | |
| 738 | // NOTE: ARM uses a MacroAssembler function here (EmitVFPTruncate). |
| 739 | // On MIPS a lot of things cannot be implemented the same way so right |
| 740 | // now it makes a lot more sense to just do things manually. |
| 741 | |
| 742 | // Save FCSR. |
| 743 | __ cfc1(scratch1, FCSR); |
| 744 | // Disable FPU exceptions. |
| 745 | __ ctc1(zero_reg, FCSR); |
| 746 | __ trunc_w_d(double_scratch, double_scratch); |
| 747 | // Retrieve FCSR. |
| 748 | __ cfc1(scratch2, FCSR); |
| 749 | // Restore FCSR. |
| 750 | __ ctc1(scratch1, FCSR); |
| 751 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 752 | // Check for inexact conversion or exception. |
| 753 | __ And(scratch2, scratch2, kFCSRFlagMask); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 754 | |
| 755 | // Jump to not_int32 if the operation did not succeed. |
| 756 | __ Branch(not_int32, ne, scratch2, Operand(zero_reg)); |
| 757 | // Get the result in the destination register. |
| 758 | __ mfc1(dst, double_scratch); |
| 759 | |
| 760 | } else { |
| 761 | // Load the double value in the destination registers. |
| 762 | __ lw(scratch2, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 763 | __ lw(scratch1, FieldMemOperand(object, HeapNumber::kMantissaOffset)); |
| 764 | |
| 765 | // Check for 0 and -0. |
| 766 | __ And(dst, scratch1, Operand(~HeapNumber::kSignMask)); |
| 767 | __ Or(dst, scratch2, Operand(dst)); |
| 768 | __ Branch(&done, eq, dst, Operand(zero_reg)); |
| 769 | |
| 770 | DoubleIs32BitInteger(masm, scratch1, scratch2, dst, scratch3, not_int32); |
| 771 | |
| 772 | // Registers state after DoubleIs32BitInteger. |
| 773 | // dst: mantissa[51:20]. |
| 774 | // scratch2: 1 |
| 775 | |
| 776 | // Shift back the higher bits of the mantissa. |
| 777 | __ srlv(dst, dst, scratch3); |
| 778 | // Set the implicit first bit. |
| 779 | __ li(at, 32); |
| 780 | __ subu(scratch3, at, scratch3); |
| 781 | __ sllv(scratch2, scratch2, scratch3); |
| 782 | __ Or(dst, dst, scratch2); |
| 783 | // Set the sign. |
| 784 | __ lw(scratch1, FieldMemOperand(object, HeapNumber::kExponentOffset)); |
| 785 | __ And(scratch1, scratch1, Operand(HeapNumber::kSignMask)); |
| 786 | Label skip_sub; |
| 787 | __ Branch(&skip_sub, ge, scratch1, Operand(zero_reg)); |
| 788 | __ Subu(dst, zero_reg, dst); |
| 789 | __ bind(&skip_sub); |
| 790 | } |
| 791 | |
| 792 | __ bind(&done); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | |
| 796 | void FloatingPointHelper::DoubleIs32BitInteger(MacroAssembler* masm, |
| 797 | Register src1, |
| 798 | Register src2, |
| 799 | Register dst, |
| 800 | Register scratch, |
| 801 | Label* not_int32) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 802 | // Get exponent alone in scratch. |
| 803 | __ Ext(scratch, |
| 804 | src1, |
| 805 | HeapNumber::kExponentShift, |
| 806 | HeapNumber::kExponentBits); |
| 807 | |
| 808 | // Substract the bias from the exponent. |
| 809 | __ Subu(scratch, scratch, Operand(HeapNumber::kExponentBias)); |
| 810 | |
| 811 | // src1: higher (exponent) part of the double value. |
| 812 | // src2: lower (mantissa) part of the double value. |
| 813 | // scratch: unbiased exponent. |
| 814 | |
| 815 | // Fast cases. Check for obvious non 32-bit integer values. |
| 816 | // Negative exponent cannot yield 32-bit integers. |
| 817 | __ Branch(not_int32, lt, scratch, Operand(zero_reg)); |
| 818 | // Exponent greater than 31 cannot yield 32-bit integers. |
| 819 | // Also, a positive value with an exponent equal to 31 is outside of the |
| 820 | // signed 32-bit integer range. |
| 821 | // Another way to put it is that if (exponent - signbit) > 30 then the |
| 822 | // number cannot be represented as an int32. |
| 823 | Register tmp = dst; |
| 824 | __ srl(at, src1, 31); |
| 825 | __ subu(tmp, scratch, at); |
| 826 | __ Branch(not_int32, gt, tmp, Operand(30)); |
| 827 | // - Bits [21:0] in the mantissa are not null. |
| 828 | __ And(tmp, src2, 0x3fffff); |
| 829 | __ Branch(not_int32, ne, tmp, Operand(zero_reg)); |
| 830 | |
| 831 | // Otherwise the exponent needs to be big enough to shift left all the |
| 832 | // non zero bits left. So we need the (30 - exponent) last bits of the |
| 833 | // 31 higher bits of the mantissa to be null. |
| 834 | // Because bits [21:0] are null, we can check instead that the |
| 835 | // (32 - exponent) last bits of the 32 higher bits of the mantisssa are null. |
| 836 | |
| 837 | // Get the 32 higher bits of the mantissa in dst. |
| 838 | __ Ext(dst, |
| 839 | src2, |
| 840 | HeapNumber::kMantissaBitsInTopWord, |
| 841 | 32 - HeapNumber::kMantissaBitsInTopWord); |
| 842 | __ sll(at, src1, HeapNumber::kNonMantissaBitsInTopWord); |
| 843 | __ or_(dst, dst, at); |
| 844 | |
| 845 | // Create the mask and test the lower bits (of the higher bits). |
| 846 | __ li(at, 32); |
| 847 | __ subu(scratch, at, scratch); |
| 848 | __ li(src2, 1); |
| 849 | __ sllv(src1, src2, scratch); |
| 850 | __ Subu(src1, src1, Operand(1)); |
| 851 | __ And(src1, dst, src1); |
| 852 | __ Branch(not_int32, ne, src1, Operand(zero_reg)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | |
| 856 | void FloatingPointHelper::CallCCodeForDoubleOperation( |
| 857 | MacroAssembler* masm, |
| 858 | Token::Value op, |
| 859 | Register heap_number_result, |
| 860 | Register scratch) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 861 | // Using core registers: |
| 862 | // a0: Left value (least significant part of mantissa). |
| 863 | // a1: Left value (sign, exponent, top of mantissa). |
| 864 | // a2: Right value (least significant part of mantissa). |
| 865 | // a3: Right value (sign, exponent, top of mantissa). |
| 866 | |
| 867 | // Assert that heap_number_result is saved. |
| 868 | // We currently always use s0 to pass it. |
| 869 | ASSERT(heap_number_result.is(s0)); |
| 870 | |
| 871 | // Push the current return address before the C call. |
| 872 | __ push(ra); |
| 873 | __ PrepareCallCFunction(4, scratch); // Two doubles are 4 arguments. |
| 874 | if (!IsMipsSoftFloatABI) { |
| 875 | CpuFeatures::Scope scope(FPU); |
| 876 | // We are not using MIPS FPU instructions, and parameters for the runtime |
| 877 | // function call are prepaired in a0-a3 registers, but function we are |
| 878 | // calling is compiled with hard-float flag and expecting hard float ABI |
| 879 | // (parameters in f12/f14 registers). We need to copy parameters from |
| 880 | // a0-a3 registers to f12/f14 register pairs. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 881 | __ Move(f12, a0, a1); |
| 882 | __ Move(f14, a2, a3); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 883 | } |
| 884 | // Call C routine that may not cause GC or other trouble. |
| 885 | __ CallCFunction(ExternalReference::double_fp_operation(op, masm->isolate()), |
| 886 | 4); |
| 887 | // Store answer in the overwritable heap number. |
| 888 | if (!IsMipsSoftFloatABI) { |
| 889 | CpuFeatures::Scope scope(FPU); |
| 890 | // Double returned in register f0. |
| 891 | __ sdc1(f0, FieldMemOperand(heap_number_result, HeapNumber::kValueOffset)); |
| 892 | } else { |
| 893 | // Double returned in registers v0 and v1. |
| 894 | __ sw(v1, FieldMemOperand(heap_number_result, HeapNumber::kExponentOffset)); |
| 895 | __ sw(v0, FieldMemOperand(heap_number_result, HeapNumber::kMantissaOffset)); |
| 896 | } |
| 897 | // Place heap_number_result in v0 and return to the pushed return address. |
| 898 | __ mov(v0, heap_number_result); |
| 899 | __ pop(ra); |
| 900 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 901 | } |
| 902 | |
| 903 | |
| 904 | // See comment for class, this does NOT work for int32's that are in Smi range. |
| 905 | void WriteInt32ToHeapNumberStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 906 | Label max_negative_int; |
| 907 | // the_int_ has the answer which is a signed int32 but not a Smi. |
| 908 | // We test for the special value that has a different exponent. |
| 909 | STATIC_ASSERT(HeapNumber::kSignMask == 0x80000000u); |
| 910 | // Test sign, and save for later conditionals. |
| 911 | __ And(sign_, the_int_, Operand(0x80000000u)); |
| 912 | __ Branch(&max_negative_int, eq, the_int_, Operand(0x80000000u)); |
| 913 | |
| 914 | // Set up the correct exponent in scratch_. All non-Smi int32s have the same. |
| 915 | // A non-Smi integer is 1.xxx * 2^30 so the exponent is 30 (biased). |
| 916 | uint32_t non_smi_exponent = |
| 917 | (HeapNumber::kExponentBias + 30) << HeapNumber::kExponentShift; |
| 918 | __ li(scratch_, Operand(non_smi_exponent)); |
| 919 | // Set the sign bit in scratch_ if the value was negative. |
| 920 | __ or_(scratch_, scratch_, sign_); |
| 921 | // Subtract from 0 if the value was negative. |
| 922 | __ subu(at, zero_reg, the_int_); |
| 923 | __ movn(the_int_, at, sign_); |
| 924 | // We should be masking the implict first digit of the mantissa away here, |
| 925 | // but it just ends up combining harmlessly with the last digit of the |
| 926 | // exponent that happens to be 1. The sign bit is 0 so we shift 10 to get |
| 927 | // the most significant 1 to hit the last bit of the 12 bit sign and exponent. |
| 928 | ASSERT(((1 << HeapNumber::kExponentShift) & non_smi_exponent) != 0); |
| 929 | const int shift_distance = HeapNumber::kNonMantissaBitsInTopWord - 2; |
| 930 | __ srl(at, the_int_, shift_distance); |
| 931 | __ or_(scratch_, scratch_, at); |
| 932 | __ sw(scratch_, FieldMemOperand(the_heap_number_, |
| 933 | HeapNumber::kExponentOffset)); |
| 934 | __ sll(scratch_, the_int_, 32 - shift_distance); |
| 935 | __ sw(scratch_, FieldMemOperand(the_heap_number_, |
| 936 | HeapNumber::kMantissaOffset)); |
| 937 | __ Ret(); |
| 938 | |
| 939 | __ bind(&max_negative_int); |
| 940 | // The max negative int32 is stored as a positive number in the mantissa of |
| 941 | // a double because it uses a sign bit instead of using two's complement. |
| 942 | // The actual mantissa bits stored are all 0 because the implicit most |
| 943 | // significant 1 bit is not stored. |
| 944 | non_smi_exponent += 1 << HeapNumber::kExponentShift; |
| 945 | __ li(scratch_, Operand(HeapNumber::kSignMask | non_smi_exponent)); |
| 946 | __ sw(scratch_, |
| 947 | FieldMemOperand(the_heap_number_, HeapNumber::kExponentOffset)); |
| 948 | __ mov(scratch_, zero_reg); |
| 949 | __ sw(scratch_, |
| 950 | FieldMemOperand(the_heap_number_, HeapNumber::kMantissaOffset)); |
| 951 | __ Ret(); |
| 952 | } |
| 953 | |
| 954 | |
| 955 | // Handle the case where the lhs and rhs are the same object. |
| 956 | // Equality is almost reflexive (everything but NaN), so this is a test |
| 957 | // for "identity and not NaN". |
| 958 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, |
| 959 | Label* slow, |
| 960 | Condition cc, |
| 961 | bool never_nan_nan) { |
| 962 | Label not_identical; |
| 963 | Label heap_number, return_equal; |
| 964 | Register exp_mask_reg = t5; |
| 965 | |
| 966 | __ Branch(¬_identical, ne, a0, Operand(a1)); |
| 967 | |
| 968 | // The two objects are identical. If we know that one of them isn't NaN then |
| 969 | // we now know they test equal. |
| 970 | if (cc != eq || !never_nan_nan) { |
| 971 | __ li(exp_mask_reg, Operand(HeapNumber::kExponentMask)); |
| 972 | |
| 973 | // Test for NaN. Sadly, we can't just compare to factory->nan_value(), |
| 974 | // so we do the second best thing - test it ourselves. |
| 975 | // They are both equal and they are not both Smis so both of them are not |
| 976 | // Smis. If it's not a heap number, then return equal. |
| 977 | if (cc == less || cc == greater) { |
| 978 | __ GetObjectType(a0, t4, t4); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 979 | __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 980 | } else { |
| 981 | __ GetObjectType(a0, t4, t4); |
| 982 | __ Branch(&heap_number, eq, t4, Operand(HEAP_NUMBER_TYPE)); |
| 983 | // Comparing JS objects with <=, >= is complicated. |
| 984 | if (cc != eq) { |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 985 | __ Branch(slow, greater, t4, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 986 | // Normally here we fall through to return_equal, but undefined is |
| 987 | // special: (undefined == undefined) == true, but |
| 988 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 989 | if (cc == less_equal || cc == greater_equal) { |
| 990 | __ Branch(&return_equal, ne, t4, Operand(ODDBALL_TYPE)); |
| 991 | __ LoadRoot(t2, Heap::kUndefinedValueRootIndex); |
| 992 | __ Branch(&return_equal, ne, a0, Operand(t2)); |
| 993 | if (cc == le) { |
| 994 | // undefined <= undefined should fail. |
| 995 | __ li(v0, Operand(GREATER)); |
| 996 | } else { |
| 997 | // undefined >= undefined should fail. |
| 998 | __ li(v0, Operand(LESS)); |
| 999 | } |
| 1000 | __ Ret(); |
| 1001 | } |
| 1002 | } |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | __ bind(&return_equal); |
| 1007 | if (cc == less) { |
| 1008 | __ li(v0, Operand(GREATER)); // Things aren't less than themselves. |
| 1009 | } else if (cc == greater) { |
| 1010 | __ li(v0, Operand(LESS)); // Things aren't greater than themselves. |
| 1011 | } else { |
| 1012 | __ mov(v0, zero_reg); // Things are <=, >=, ==, === themselves. |
| 1013 | } |
| 1014 | __ Ret(); |
| 1015 | |
| 1016 | if (cc != eq || !never_nan_nan) { |
| 1017 | // For less and greater we don't have to check for NaN since the result of |
| 1018 | // x < x is false regardless. For the others here is some code to check |
| 1019 | // for NaN. |
| 1020 | if (cc != lt && cc != gt) { |
| 1021 | __ bind(&heap_number); |
| 1022 | // It is a heap number, so return non-equal if it's NaN and equal if it's |
| 1023 | // not NaN. |
| 1024 | |
| 1025 | // The representation of NaN values has all exponent bits (52..62) set, |
| 1026 | // and not all mantissa bits (0..51) clear. |
| 1027 | // Read top bits of double representation (second word of value). |
| 1028 | __ lw(t2, FieldMemOperand(a0, HeapNumber::kExponentOffset)); |
| 1029 | // Test that exponent bits are all set. |
| 1030 | __ And(t3, t2, Operand(exp_mask_reg)); |
| 1031 | // If all bits not set (ne cond), then not a NaN, objects are equal. |
| 1032 | __ Branch(&return_equal, ne, t3, Operand(exp_mask_reg)); |
| 1033 | |
| 1034 | // Shift out flag and all exponent bits, retaining only mantissa. |
| 1035 | __ sll(t2, t2, HeapNumber::kNonMantissaBitsInTopWord); |
| 1036 | // Or with all low-bits of mantissa. |
| 1037 | __ lw(t3, FieldMemOperand(a0, HeapNumber::kMantissaOffset)); |
| 1038 | __ Or(v0, t3, Operand(t2)); |
| 1039 | // For equal we already have the right value in v0: Return zero (equal) |
| 1040 | // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| 1041 | // not (it's a NaN). For <= and >= we need to load v0 with the failing |
| 1042 | // value if it's a NaN. |
| 1043 | if (cc != eq) { |
| 1044 | // All-zero means Infinity means equal. |
| 1045 | __ Ret(eq, v0, Operand(zero_reg)); |
| 1046 | if (cc == le) { |
| 1047 | __ li(v0, Operand(GREATER)); // NaN <= NaN should fail. |
| 1048 | } else { |
| 1049 | __ li(v0, Operand(LESS)); // NaN >= NaN should fail. |
| 1050 | } |
| 1051 | } |
| 1052 | __ Ret(); |
| 1053 | } |
| 1054 | // No fall through here. |
| 1055 | } |
| 1056 | |
| 1057 | __ bind(¬_identical); |
| 1058 | } |
| 1059 | |
| 1060 | |
| 1061 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 1062 | Register lhs, |
| 1063 | Register rhs, |
| 1064 | Label* both_loaded_as_doubles, |
| 1065 | Label* slow, |
| 1066 | bool strict) { |
| 1067 | ASSERT((lhs.is(a0) && rhs.is(a1)) || |
| 1068 | (lhs.is(a1) && rhs.is(a0))); |
| 1069 | |
| 1070 | Label lhs_is_smi; |
| 1071 | __ And(t0, lhs, Operand(kSmiTagMask)); |
| 1072 | __ Branch(&lhs_is_smi, eq, t0, Operand(zero_reg)); |
| 1073 | // Rhs is a Smi. |
| 1074 | // Check whether the non-smi is a heap number. |
| 1075 | __ GetObjectType(lhs, t4, t4); |
| 1076 | if (strict) { |
| 1077 | // If lhs was not a number and rhs was a Smi then strict equality cannot |
| 1078 | // succeed. Return non-equal (lhs is already not zero). |
| 1079 | __ mov(v0, lhs); |
| 1080 | __ Ret(ne, t4, Operand(HEAP_NUMBER_TYPE)); |
| 1081 | } else { |
| 1082 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 1083 | // the runtime. |
| 1084 | __ Branch(slow, ne, t4, Operand(HEAP_NUMBER_TYPE)); |
| 1085 | } |
| 1086 | |
| 1087 | // Rhs is a smi, lhs is a number. |
| 1088 | // Convert smi rhs to double. |
| 1089 | if (CpuFeatures::IsSupported(FPU)) { |
| 1090 | CpuFeatures::Scope scope(FPU); |
| 1091 | __ sra(at, rhs, kSmiTagSize); |
| 1092 | __ mtc1(at, f14); |
| 1093 | __ cvt_d_w(f14, f14); |
| 1094 | __ ldc1(f12, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 1095 | } else { |
| 1096 | // Load lhs to a double in a2, a3. |
| 1097 | __ lw(a3, FieldMemOperand(lhs, HeapNumber::kValueOffset + 4)); |
| 1098 | __ lw(a2, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 1099 | |
| 1100 | // Write Smi from rhs to a1 and a0 in double format. t5 is scratch. |
| 1101 | __ mov(t6, rhs); |
| 1102 | ConvertToDoubleStub stub1(a1, a0, t6, t5); |
| 1103 | __ push(ra); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1104 | __ Call(stub1.GetCode()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1105 | |
| 1106 | __ pop(ra); |
| 1107 | } |
| 1108 | |
| 1109 | // We now have both loaded as doubles. |
| 1110 | __ jmp(both_loaded_as_doubles); |
| 1111 | |
| 1112 | __ bind(&lhs_is_smi); |
| 1113 | // Lhs is a Smi. Check whether the non-smi is a heap number. |
| 1114 | __ GetObjectType(rhs, t4, t4); |
| 1115 | if (strict) { |
| 1116 | // If lhs was not a number and rhs was a Smi then strict equality cannot |
| 1117 | // succeed. Return non-equal. |
| 1118 | __ li(v0, Operand(1)); |
| 1119 | __ Ret(ne, t4, Operand(HEAP_NUMBER_TYPE)); |
| 1120 | } else { |
| 1121 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 1122 | // the runtime. |
| 1123 | __ Branch(slow, ne, t4, Operand(HEAP_NUMBER_TYPE)); |
| 1124 | } |
| 1125 | |
| 1126 | // Lhs is a smi, rhs is a number. |
| 1127 | // Convert smi lhs to double. |
| 1128 | if (CpuFeatures::IsSupported(FPU)) { |
| 1129 | CpuFeatures::Scope scope(FPU); |
| 1130 | __ sra(at, lhs, kSmiTagSize); |
| 1131 | __ mtc1(at, f12); |
| 1132 | __ cvt_d_w(f12, f12); |
| 1133 | __ ldc1(f14, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1134 | } else { |
| 1135 | // Convert lhs to a double format. t5 is scratch. |
| 1136 | __ mov(t6, lhs); |
| 1137 | ConvertToDoubleStub stub2(a3, a2, t6, t5); |
| 1138 | __ push(ra); |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 1139 | __ Call(stub2.GetCode()); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1140 | __ pop(ra); |
| 1141 | // Load rhs to a double in a1, a0. |
| 1142 | if (rhs.is(a0)) { |
| 1143 | __ lw(a1, FieldMemOperand(rhs, HeapNumber::kValueOffset + 4)); |
| 1144 | __ lw(a0, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1145 | } else { |
| 1146 | __ lw(a0, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1147 | __ lw(a1, FieldMemOperand(rhs, HeapNumber::kValueOffset + 4)); |
| 1148 | } |
| 1149 | } |
| 1150 | // Fall through to both_loaded_as_doubles. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | |
| 1154 | void EmitNanCheck(MacroAssembler* masm, Condition cc) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1155 | bool exp_first = (HeapNumber::kExponentOffset == HeapNumber::kValueOffset); |
| 1156 | if (CpuFeatures::IsSupported(FPU)) { |
| 1157 | CpuFeatures::Scope scope(FPU); |
| 1158 | // Lhs and rhs are already loaded to f12 and f14 register pairs. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1159 | __ Move(t0, t1, f14); |
| 1160 | __ Move(t2, t3, f12); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1161 | } else { |
| 1162 | // Lhs and rhs are already loaded to GP registers. |
| 1163 | __ mov(t0, a0); // a0 has LS 32 bits of rhs. |
| 1164 | __ mov(t1, a1); // a1 has MS 32 bits of rhs. |
| 1165 | __ mov(t2, a2); // a2 has LS 32 bits of lhs. |
| 1166 | __ mov(t3, a3); // a3 has MS 32 bits of lhs. |
| 1167 | } |
| 1168 | Register rhs_exponent = exp_first ? t0 : t1; |
| 1169 | Register lhs_exponent = exp_first ? t2 : t3; |
| 1170 | Register rhs_mantissa = exp_first ? t1 : t0; |
| 1171 | Register lhs_mantissa = exp_first ? t3 : t2; |
| 1172 | Label one_is_nan, neither_is_nan; |
| 1173 | Label lhs_not_nan_exp_mask_is_loaded; |
| 1174 | |
| 1175 | Register exp_mask_reg = t4; |
| 1176 | __ li(exp_mask_reg, HeapNumber::kExponentMask); |
| 1177 | __ and_(t5, lhs_exponent, exp_mask_reg); |
| 1178 | __ Branch(&lhs_not_nan_exp_mask_is_loaded, ne, t5, Operand(exp_mask_reg)); |
| 1179 | |
| 1180 | __ sll(t5, lhs_exponent, HeapNumber::kNonMantissaBitsInTopWord); |
| 1181 | __ Branch(&one_is_nan, ne, t5, Operand(zero_reg)); |
| 1182 | |
| 1183 | __ Branch(&one_is_nan, ne, lhs_mantissa, Operand(zero_reg)); |
| 1184 | |
| 1185 | __ li(exp_mask_reg, HeapNumber::kExponentMask); |
| 1186 | __ bind(&lhs_not_nan_exp_mask_is_loaded); |
| 1187 | __ and_(t5, rhs_exponent, exp_mask_reg); |
| 1188 | |
| 1189 | __ Branch(&neither_is_nan, ne, t5, Operand(exp_mask_reg)); |
| 1190 | |
| 1191 | __ sll(t5, rhs_exponent, HeapNumber::kNonMantissaBitsInTopWord); |
| 1192 | __ Branch(&one_is_nan, ne, t5, Operand(zero_reg)); |
| 1193 | |
| 1194 | __ Branch(&neither_is_nan, eq, rhs_mantissa, Operand(zero_reg)); |
| 1195 | |
| 1196 | __ bind(&one_is_nan); |
| 1197 | // NaN comparisons always fail. |
| 1198 | // Load whatever we need in v0 to make the comparison fail. |
| 1199 | if (cc == lt || cc == le) { |
| 1200 | __ li(v0, Operand(GREATER)); |
| 1201 | } else { |
| 1202 | __ li(v0, Operand(LESS)); |
| 1203 | } |
| 1204 | __ Ret(); // Return. |
| 1205 | |
| 1206 | __ bind(&neither_is_nan); |
| 1207 | } |
| 1208 | |
| 1209 | |
| 1210 | static void EmitTwoNonNanDoubleComparison(MacroAssembler* masm, Condition cc) { |
| 1211 | // f12 and f14 have the two doubles. Neither is a NaN. |
| 1212 | // Call a native function to do a comparison between two non-NaNs. |
| 1213 | // Call C routine that may not cause GC or other trouble. |
| 1214 | // We use a call_was and return manually because we need arguments slots to |
| 1215 | // be freed. |
| 1216 | |
| 1217 | Label return_result_not_equal, return_result_equal; |
| 1218 | if (cc == eq) { |
| 1219 | // Doubles are not equal unless they have the same bit pattern. |
| 1220 | // Exception: 0 and -0. |
| 1221 | bool exp_first = (HeapNumber::kExponentOffset == HeapNumber::kValueOffset); |
| 1222 | if (CpuFeatures::IsSupported(FPU)) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1223 | CpuFeatures::Scope scope(FPU); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1224 | // Lhs and rhs are already loaded to f12 and f14 register pairs. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1225 | __ Move(t0, t1, f14); |
| 1226 | __ Move(t2, t3, f12); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1227 | } else { |
| 1228 | // Lhs and rhs are already loaded to GP registers. |
| 1229 | __ mov(t0, a0); // a0 has LS 32 bits of rhs. |
| 1230 | __ mov(t1, a1); // a1 has MS 32 bits of rhs. |
| 1231 | __ mov(t2, a2); // a2 has LS 32 bits of lhs. |
| 1232 | __ mov(t3, a3); // a3 has MS 32 bits of lhs. |
| 1233 | } |
| 1234 | Register rhs_exponent = exp_first ? t0 : t1; |
| 1235 | Register lhs_exponent = exp_first ? t2 : t3; |
| 1236 | Register rhs_mantissa = exp_first ? t1 : t0; |
| 1237 | Register lhs_mantissa = exp_first ? t3 : t2; |
| 1238 | |
| 1239 | __ xor_(v0, rhs_mantissa, lhs_mantissa); |
| 1240 | __ Branch(&return_result_not_equal, ne, v0, Operand(zero_reg)); |
| 1241 | |
| 1242 | __ subu(v0, rhs_exponent, lhs_exponent); |
| 1243 | __ Branch(&return_result_equal, eq, v0, Operand(zero_reg)); |
| 1244 | // 0, -0 case. |
| 1245 | __ sll(rhs_exponent, rhs_exponent, kSmiTagSize); |
| 1246 | __ sll(lhs_exponent, lhs_exponent, kSmiTagSize); |
| 1247 | __ or_(t4, rhs_exponent, lhs_exponent); |
| 1248 | __ or_(t4, t4, rhs_mantissa); |
| 1249 | |
| 1250 | __ Branch(&return_result_not_equal, ne, t4, Operand(zero_reg)); |
| 1251 | |
| 1252 | __ bind(&return_result_equal); |
| 1253 | __ li(v0, Operand(EQUAL)); |
| 1254 | __ Ret(); |
| 1255 | } |
| 1256 | |
| 1257 | __ bind(&return_result_not_equal); |
| 1258 | |
| 1259 | if (!CpuFeatures::IsSupported(FPU)) { |
| 1260 | __ push(ra); |
| 1261 | __ PrepareCallCFunction(4, t4); // Two doubles count as 4 arguments. |
| 1262 | if (!IsMipsSoftFloatABI) { |
| 1263 | // We are not using MIPS FPU instructions, and parameters for the runtime |
| 1264 | // function call are prepaired in a0-a3 registers, but function we are |
| 1265 | // calling is compiled with hard-float flag and expecting hard float ABI |
| 1266 | // (parameters in f12/f14 registers). We need to copy parameters from |
| 1267 | // a0-a3 registers to f12/f14 register pairs. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1268 | __ Move(f12, a0, a1); |
| 1269 | __ Move(f14, a2, a3); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1270 | } |
| 1271 | __ CallCFunction(ExternalReference::compare_doubles(masm->isolate()), 4); |
| 1272 | __ pop(ra); // Because this function returns int, result is in v0. |
| 1273 | __ Ret(); |
| 1274 | } else { |
| 1275 | CpuFeatures::Scope scope(FPU); |
| 1276 | Label equal, less_than; |
| 1277 | __ c(EQ, D, f12, f14); |
| 1278 | __ bc1t(&equal); |
| 1279 | __ nop(); |
| 1280 | |
| 1281 | __ c(OLT, D, f12, f14); |
| 1282 | __ bc1t(&less_than); |
| 1283 | __ nop(); |
| 1284 | |
| 1285 | // Not equal, not less, not NaN, must be greater. |
| 1286 | __ li(v0, Operand(GREATER)); |
| 1287 | __ Ret(); |
| 1288 | |
| 1289 | __ bind(&equal); |
| 1290 | __ li(v0, Operand(EQUAL)); |
| 1291 | __ Ret(); |
| 1292 | |
| 1293 | __ bind(&less_than); |
| 1294 | __ li(v0, Operand(LESS)); |
| 1295 | __ Ret(); |
| 1296 | } |
| 1297 | } |
| 1298 | |
| 1299 | |
| 1300 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 1301 | Register lhs, |
| 1302 | Register rhs) { |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1303 | // If either operand is a JS object or an oddball value, then they are |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1304 | // not equal since their pointers are different. |
| 1305 | // There is no test for undetectability in strict equality. |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1306 | STATIC_ASSERT(LAST_TYPE == LAST_CALLABLE_SPEC_OBJECT_TYPE); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1307 | Label first_non_object; |
| 1308 | // Get the type of the first operand into a2 and compare it with |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1309 | // FIRST_SPEC_OBJECT_TYPE. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1310 | __ GetObjectType(lhs, a2, a2); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1311 | __ Branch(&first_non_object, less, a2, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1312 | |
| 1313 | // Return non-zero. |
| 1314 | Label return_not_equal; |
| 1315 | __ bind(&return_not_equal); |
| 1316 | __ li(v0, Operand(1)); |
| 1317 | __ Ret(); |
| 1318 | |
| 1319 | __ bind(&first_non_object); |
| 1320 | // Check for oddballs: true, false, null, undefined. |
| 1321 | __ Branch(&return_not_equal, eq, a2, Operand(ODDBALL_TYPE)); |
| 1322 | |
| 1323 | __ GetObjectType(rhs, a3, a3); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1324 | __ Branch(&return_not_equal, greater, a3, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1325 | |
| 1326 | // Check for oddballs: true, false, null, undefined. |
| 1327 | __ Branch(&return_not_equal, eq, a3, Operand(ODDBALL_TYPE)); |
| 1328 | |
| 1329 | // Now that we have the types we might as well check for symbol-symbol. |
| 1330 | // Ensure that no non-strings have the symbol bit set. |
| 1331 | STATIC_ASSERT(LAST_TYPE < kNotStringTag + kIsSymbolMask); |
| 1332 | STATIC_ASSERT(kSymbolTag != 0); |
| 1333 | __ And(t2, a2, Operand(a3)); |
| 1334 | __ And(t0, t2, Operand(kIsSymbolMask)); |
| 1335 | __ Branch(&return_not_equal, ne, t0, Operand(zero_reg)); |
| 1336 | } |
| 1337 | |
| 1338 | |
| 1339 | static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, |
| 1340 | Register lhs, |
| 1341 | Register rhs, |
| 1342 | Label* both_loaded_as_doubles, |
| 1343 | Label* not_heap_numbers, |
| 1344 | Label* slow) { |
| 1345 | __ GetObjectType(lhs, a3, a2); |
| 1346 | __ Branch(not_heap_numbers, ne, a2, Operand(HEAP_NUMBER_TYPE)); |
| 1347 | __ lw(a2, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 1348 | // If first was a heap number & second wasn't, go to slow case. |
| 1349 | __ Branch(slow, ne, a3, Operand(a2)); |
| 1350 | |
| 1351 | // Both are heap numbers. Load them up then jump to the code we have |
| 1352 | // for that. |
| 1353 | if (CpuFeatures::IsSupported(FPU)) { |
| 1354 | CpuFeatures::Scope scope(FPU); |
| 1355 | __ ldc1(f12, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 1356 | __ ldc1(f14, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1357 | } else { |
| 1358 | __ lw(a2, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 1359 | __ lw(a3, FieldMemOperand(lhs, HeapNumber::kValueOffset + 4)); |
| 1360 | if (rhs.is(a0)) { |
| 1361 | __ lw(a1, FieldMemOperand(rhs, HeapNumber::kValueOffset + 4)); |
| 1362 | __ lw(a0, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1363 | } else { |
| 1364 | __ lw(a0, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 1365 | __ lw(a1, FieldMemOperand(rhs, HeapNumber::kValueOffset + 4)); |
| 1366 | } |
| 1367 | } |
| 1368 | __ jmp(both_loaded_as_doubles); |
| 1369 | } |
| 1370 | |
| 1371 | |
| 1372 | // Fast negative check for symbol-to-symbol equality. |
| 1373 | static void EmitCheckForSymbolsOrObjects(MacroAssembler* masm, |
| 1374 | Register lhs, |
| 1375 | Register rhs, |
| 1376 | Label* possible_strings, |
| 1377 | Label* not_both_strings) { |
| 1378 | ASSERT((lhs.is(a0) && rhs.is(a1)) || |
| 1379 | (lhs.is(a1) && rhs.is(a0))); |
| 1380 | |
| 1381 | // a2 is object type of lhs. |
| 1382 | // Ensure that no non-strings have the symbol bit set. |
| 1383 | Label object_test; |
| 1384 | STATIC_ASSERT(kSymbolTag != 0); |
| 1385 | __ And(at, a2, Operand(kIsNotStringMask)); |
| 1386 | __ Branch(&object_test, ne, at, Operand(zero_reg)); |
| 1387 | __ And(at, a2, Operand(kIsSymbolMask)); |
| 1388 | __ Branch(possible_strings, eq, at, Operand(zero_reg)); |
| 1389 | __ GetObjectType(rhs, a3, a3); |
| 1390 | __ Branch(not_both_strings, ge, a3, Operand(FIRST_NONSTRING_TYPE)); |
| 1391 | __ And(at, a3, Operand(kIsSymbolMask)); |
| 1392 | __ Branch(possible_strings, eq, at, Operand(zero_reg)); |
| 1393 | |
| 1394 | // Both are symbols. We already checked they weren't the same pointer |
| 1395 | // so they are not equal. |
| 1396 | __ li(v0, Operand(1)); // Non-zero indicates not equal. |
| 1397 | __ Ret(); |
| 1398 | |
| 1399 | __ bind(&object_test); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1400 | __ Branch(not_both_strings, lt, a2, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1401 | __ GetObjectType(rhs, a2, a3); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1402 | __ Branch(not_both_strings, lt, a3, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1403 | |
| 1404 | // If both objects are undetectable, they are equal. Otherwise, they |
| 1405 | // are not equal, since they are different objects and an object is not |
| 1406 | // equal to undefined. |
| 1407 | __ lw(a3, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 1408 | __ lbu(a2, FieldMemOperand(a2, Map::kBitFieldOffset)); |
| 1409 | __ lbu(a3, FieldMemOperand(a3, Map::kBitFieldOffset)); |
| 1410 | __ and_(a0, a2, a3); |
| 1411 | __ And(a0, a0, Operand(1 << Map::kIsUndetectable)); |
| 1412 | __ Xor(v0, a0, Operand(1 << Map::kIsUndetectable)); |
| 1413 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1414 | } |
| 1415 | |
| 1416 | |
| 1417 | void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm, |
| 1418 | Register object, |
| 1419 | Register result, |
| 1420 | Register scratch1, |
| 1421 | Register scratch2, |
| 1422 | Register scratch3, |
| 1423 | bool object_is_smi, |
| 1424 | Label* not_found) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1425 | // Use of registers. Register result is used as a temporary. |
| 1426 | Register number_string_cache = result; |
| 1427 | Register mask = scratch3; |
| 1428 | |
| 1429 | // Load the number string cache. |
| 1430 | __ LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex); |
| 1431 | |
| 1432 | // Make the hash mask from the length of the number string cache. It |
| 1433 | // contains two elements (number and string) for each cache entry. |
| 1434 | __ lw(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset)); |
| 1435 | // Divide length by two (length is a smi). |
| 1436 | __ sra(mask, mask, kSmiTagSize + 1); |
| 1437 | __ Addu(mask, mask, -1); // Make mask. |
| 1438 | |
| 1439 | // Calculate the entry in the number string cache. The hash value in the |
| 1440 | // number string cache for smis is just the smi value, and the hash for |
| 1441 | // doubles is the xor of the upper and lower words. See |
| 1442 | // Heap::GetNumberStringCache. |
| 1443 | Isolate* isolate = masm->isolate(); |
| 1444 | Label is_smi; |
| 1445 | Label load_result_from_cache; |
| 1446 | if (!object_is_smi) { |
| 1447 | __ JumpIfSmi(object, &is_smi); |
| 1448 | if (CpuFeatures::IsSupported(FPU)) { |
| 1449 | CpuFeatures::Scope scope(FPU); |
| 1450 | __ CheckMap(object, |
| 1451 | scratch1, |
| 1452 | Heap::kHeapNumberMapRootIndex, |
| 1453 | not_found, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1454 | DONT_DO_SMI_CHECK); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1455 | |
| 1456 | STATIC_ASSERT(8 == kDoubleSize); |
| 1457 | __ Addu(scratch1, |
| 1458 | object, |
| 1459 | Operand(HeapNumber::kValueOffset - kHeapObjectTag)); |
| 1460 | __ lw(scratch2, MemOperand(scratch1, kPointerSize)); |
| 1461 | __ lw(scratch1, MemOperand(scratch1, 0)); |
| 1462 | __ Xor(scratch1, scratch1, Operand(scratch2)); |
| 1463 | __ And(scratch1, scratch1, Operand(mask)); |
| 1464 | |
| 1465 | // Calculate address of entry in string cache: each entry consists |
| 1466 | // of two pointer sized fields. |
| 1467 | __ sll(scratch1, scratch1, kPointerSizeLog2 + 1); |
| 1468 | __ Addu(scratch1, number_string_cache, scratch1); |
| 1469 | |
| 1470 | Register probe = mask; |
| 1471 | __ lw(probe, |
| 1472 | FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| 1473 | __ JumpIfSmi(probe, not_found); |
| 1474 | __ ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset)); |
| 1475 | __ ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset)); |
| 1476 | __ c(EQ, D, f12, f14); |
| 1477 | __ bc1t(&load_result_from_cache); |
| 1478 | __ nop(); // bc1t() requires explicit fill of branch delay slot. |
| 1479 | __ Branch(not_found); |
| 1480 | } else { |
| 1481 | // Note that there is no cache check for non-FPU case, even though |
| 1482 | // it seems there could be. May be a tiny opimization for non-FPU |
| 1483 | // cores. |
| 1484 | __ Branch(not_found); |
| 1485 | } |
| 1486 | } |
| 1487 | |
| 1488 | __ bind(&is_smi); |
| 1489 | Register scratch = scratch1; |
| 1490 | __ sra(scratch, object, 1); // Shift away the tag. |
| 1491 | __ And(scratch, mask, Operand(scratch)); |
| 1492 | |
| 1493 | // Calculate address of entry in string cache: each entry consists |
| 1494 | // of two pointer sized fields. |
| 1495 | __ sll(scratch, scratch, kPointerSizeLog2 + 1); |
| 1496 | __ Addu(scratch, number_string_cache, scratch); |
| 1497 | |
| 1498 | // Check if the entry is the smi we are looking for. |
| 1499 | Register probe = mask; |
| 1500 | __ lw(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize)); |
| 1501 | __ Branch(not_found, ne, object, Operand(probe)); |
| 1502 | |
| 1503 | // Get the result from the cache. |
| 1504 | __ bind(&load_result_from_cache); |
| 1505 | __ lw(result, |
| 1506 | FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize)); |
| 1507 | |
| 1508 | __ IncrementCounter(isolate->counters()->number_to_string_native(), |
| 1509 | 1, |
| 1510 | scratch1, |
| 1511 | scratch2); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | void NumberToStringStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1516 | Label runtime; |
| 1517 | |
| 1518 | __ lw(a1, MemOperand(sp, 0)); |
| 1519 | |
| 1520 | // Generate code to lookup number in the number string cache. |
| 1521 | GenerateLookupNumberStringCache(masm, a1, v0, a2, a3, t0, false, &runtime); |
| 1522 | __ Addu(sp, sp, Operand(1 * kPointerSize)); |
| 1523 | __ Ret(); |
| 1524 | |
| 1525 | __ bind(&runtime); |
| 1526 | // Handle number to string in the runtime system if not found in the cache. |
| 1527 | __ TailCallRuntime(Runtime::kNumberToString, 1, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1528 | } |
| 1529 | |
| 1530 | |
| 1531 | // On entry lhs_ (lhs) and rhs_ (rhs) are the things to be compared. |
| 1532 | // On exit, v0 is 0, positive, or negative (smi) to indicate the result |
| 1533 | // of the comparison. |
| 1534 | void CompareStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1535 | Label slow; // Call builtin. |
| 1536 | Label not_smis, both_loaded_as_doubles; |
| 1537 | |
| 1538 | |
| 1539 | if (include_smi_compare_) { |
| 1540 | Label not_two_smis, smi_done; |
| 1541 | __ Or(a2, a1, a0); |
| 1542 | __ JumpIfNotSmi(a2, ¬_two_smis); |
| 1543 | __ sra(a1, a1, 1); |
| 1544 | __ sra(a0, a0, 1); |
| 1545 | __ Subu(v0, a1, a0); |
| 1546 | __ Ret(); |
| 1547 | __ bind(¬_two_smis); |
| 1548 | } else if (FLAG_debug_code) { |
| 1549 | __ Or(a2, a1, a0); |
| 1550 | __ And(a2, a2, kSmiTagMask); |
| 1551 | __ Assert(ne, "CompareStub: unexpected smi operands.", |
| 1552 | a2, Operand(zero_reg)); |
| 1553 | } |
| 1554 | |
| 1555 | |
| 1556 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 1557 | // it is certain that at least one operand isn't a smi. |
| 1558 | |
| 1559 | // Handle the case where the objects are identical. Either returns the answer |
| 1560 | // or goes to slow. Only falls through if the objects were not identical. |
| 1561 | EmitIdenticalObjectComparison(masm, &slow, cc_, never_nan_nan_); |
| 1562 | |
| 1563 | // If either is a Smi (we know that not both are), then they can only |
| 1564 | // be strictly equal if the other is a HeapNumber. |
| 1565 | STATIC_ASSERT(kSmiTag == 0); |
| 1566 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 1567 | __ And(t2, lhs_, Operand(rhs_)); |
| 1568 | __ JumpIfNotSmi(t2, ¬_smis, t0); |
| 1569 | // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| 1570 | // 1) Return the answer. |
| 1571 | // 2) Go to slow. |
| 1572 | // 3) Fall through to both_loaded_as_doubles. |
| 1573 | // 4) Jump to rhs_not_nan. |
| 1574 | // In cases 3 and 4 we have found out we were dealing with a number-number |
| 1575 | // comparison and the numbers have been loaded into f12 and f14 as doubles, |
| 1576 | // or in GP registers (a0, a1, a2, a3) depending on the presence of the FPU. |
| 1577 | EmitSmiNonsmiComparison(masm, lhs_, rhs_, |
| 1578 | &both_loaded_as_doubles, &slow, strict_); |
| 1579 | |
| 1580 | __ bind(&both_loaded_as_doubles); |
| 1581 | // f12, f14 are the double representations of the left hand side |
| 1582 | // and the right hand side if we have FPU. Otherwise a2, a3 represent |
| 1583 | // left hand side and a0, a1 represent right hand side. |
| 1584 | |
| 1585 | Isolate* isolate = masm->isolate(); |
| 1586 | if (CpuFeatures::IsSupported(FPU)) { |
| 1587 | CpuFeatures::Scope scope(FPU); |
| 1588 | Label nan; |
| 1589 | __ li(t0, Operand(LESS)); |
| 1590 | __ li(t1, Operand(GREATER)); |
| 1591 | __ li(t2, Operand(EQUAL)); |
| 1592 | |
| 1593 | // Check if either rhs or lhs is NaN. |
| 1594 | __ c(UN, D, f12, f14); |
| 1595 | __ bc1t(&nan); |
| 1596 | __ nop(); |
| 1597 | |
| 1598 | // Check if LESS condition is satisfied. If true, move conditionally |
| 1599 | // result to v0. |
| 1600 | __ c(OLT, D, f12, f14); |
| 1601 | __ movt(v0, t0); |
| 1602 | // Use previous check to store conditionally to v0 oposite condition |
| 1603 | // (GREATER). If rhs is equal to lhs, this will be corrected in next |
| 1604 | // check. |
| 1605 | __ movf(v0, t1); |
| 1606 | // Check if EQUAL condition is satisfied. If true, move conditionally |
| 1607 | // result to v0. |
| 1608 | __ c(EQ, D, f12, f14); |
| 1609 | __ movt(v0, t2); |
| 1610 | |
| 1611 | __ Ret(); |
| 1612 | |
| 1613 | __ bind(&nan); |
| 1614 | // NaN comparisons always fail. |
| 1615 | // Load whatever we need in v0 to make the comparison fail. |
| 1616 | if (cc_ == lt || cc_ == le) { |
| 1617 | __ li(v0, Operand(GREATER)); |
| 1618 | } else { |
| 1619 | __ li(v0, Operand(LESS)); |
| 1620 | } |
| 1621 | __ Ret(); |
| 1622 | } else { |
| 1623 | // Checks for NaN in the doubles we have loaded. Can return the answer or |
| 1624 | // fall through if neither is a NaN. Also binds rhs_not_nan. |
| 1625 | EmitNanCheck(masm, cc_); |
| 1626 | |
| 1627 | // Compares two doubles that are not NaNs. Returns the answer. |
| 1628 | // Never falls through. |
| 1629 | EmitTwoNonNanDoubleComparison(masm, cc_); |
| 1630 | } |
| 1631 | |
| 1632 | __ bind(¬_smis); |
| 1633 | // At this point we know we are dealing with two different objects, |
| 1634 | // and neither of them is a Smi. The objects are in lhs_ and rhs_. |
| 1635 | if (strict_) { |
| 1636 | // This returns non-equal for some object types, or falls through if it |
| 1637 | // was not lucky. |
| 1638 | EmitStrictTwoHeapObjectCompare(masm, lhs_, rhs_); |
| 1639 | } |
| 1640 | |
| 1641 | Label check_for_symbols; |
| 1642 | Label flat_string_check; |
| 1643 | // Check for heap-number-heap-number comparison. Can jump to slow case, |
| 1644 | // or load both doubles and jump to the code that handles |
| 1645 | // that case. If the inputs are not doubles then jumps to check_for_symbols. |
| 1646 | // In this case a2 will contain the type of lhs_. |
| 1647 | EmitCheckForTwoHeapNumbers(masm, |
| 1648 | lhs_, |
| 1649 | rhs_, |
| 1650 | &both_loaded_as_doubles, |
| 1651 | &check_for_symbols, |
| 1652 | &flat_string_check); |
| 1653 | |
| 1654 | __ bind(&check_for_symbols); |
| 1655 | if (cc_ == eq && !strict_) { |
| 1656 | // Returns an answer for two symbols or two detectable objects. |
| 1657 | // Otherwise jumps to string case or not both strings case. |
| 1658 | // Assumes that a2 is the type of lhs_ on entry. |
| 1659 | EmitCheckForSymbolsOrObjects(masm, lhs_, rhs_, &flat_string_check, &slow); |
| 1660 | } |
| 1661 | |
| 1662 | // Check for both being sequential ASCII strings, and inline if that is the |
| 1663 | // case. |
| 1664 | __ bind(&flat_string_check); |
| 1665 | |
| 1666 | __ JumpIfNonSmisNotBothSequentialAsciiStrings(lhs_, rhs_, a2, a3, &slow); |
| 1667 | |
| 1668 | __ IncrementCounter(isolate->counters()->string_compare_native(), 1, a2, a3); |
| 1669 | if (cc_ == eq) { |
| 1670 | StringCompareStub::GenerateFlatAsciiStringEquals(masm, |
| 1671 | lhs_, |
| 1672 | rhs_, |
| 1673 | a2, |
| 1674 | a3, |
| 1675 | t0); |
| 1676 | } else { |
| 1677 | StringCompareStub::GenerateCompareFlatAsciiStrings(masm, |
| 1678 | lhs_, |
| 1679 | rhs_, |
| 1680 | a2, |
| 1681 | a3, |
| 1682 | t0, |
| 1683 | t1); |
| 1684 | } |
| 1685 | // Never falls through to here. |
| 1686 | |
| 1687 | __ bind(&slow); |
| 1688 | // Prepare for call to builtin. Push object pointers, a0 (lhs) first, |
| 1689 | // a1 (rhs) second. |
| 1690 | __ Push(lhs_, rhs_); |
| 1691 | // Figure out which native to call and setup the arguments. |
| 1692 | Builtins::JavaScript native; |
| 1693 | if (cc_ == eq) { |
| 1694 | native = strict_ ? Builtins::STRICT_EQUALS : Builtins::EQUALS; |
| 1695 | } else { |
| 1696 | native = Builtins::COMPARE; |
| 1697 | int ncr; // NaN compare result. |
| 1698 | if (cc_ == lt || cc_ == le) { |
| 1699 | ncr = GREATER; |
| 1700 | } else { |
| 1701 | ASSERT(cc_ == gt || cc_ == ge); // Remaining cases. |
| 1702 | ncr = LESS; |
| 1703 | } |
| 1704 | __ li(a0, Operand(Smi::FromInt(ncr))); |
| 1705 | __ push(a0); |
| 1706 | } |
| 1707 | |
| 1708 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 1709 | // tagged as a small integer. |
| 1710 | __ InvokeBuiltin(native, JUMP_FUNCTION); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1711 | } |
| 1712 | |
| 1713 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1714 | // The stub returns zero for false, and a non-zero value for true. |
| 1715 | void ToBooleanStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1716 | // This stub uses FPU instructions. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1717 | CpuFeatures::Scope scope(FPU); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1718 | |
| 1719 | Label false_result; |
| 1720 | Label not_heap_number; |
| 1721 | Register scratch0 = t5.is(tos_) ? t3 : t5; |
| 1722 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1723 | // undefined -> false |
| 1724 | __ LoadRoot(scratch0, Heap::kUndefinedValueRootIndex); |
| 1725 | __ Branch(&false_result, eq, tos_, Operand(scratch0)); |
| 1726 | |
| 1727 | // Boolean -> its value |
| 1728 | __ LoadRoot(scratch0, Heap::kFalseValueRootIndex); |
| 1729 | __ Branch(&false_result, eq, tos_, Operand(scratch0)); |
| 1730 | __ LoadRoot(scratch0, Heap::kTrueValueRootIndex); |
| 1731 | // "tos_" is a register and contains a non-zero value. Hence we implicitly |
| 1732 | // return true if the equal condition is satisfied. |
| 1733 | __ Ret(eq, tos_, Operand(scratch0)); |
| 1734 | |
| 1735 | // Smis: 0 -> false, all other -> true |
| 1736 | __ And(scratch0, tos_, tos_); |
| 1737 | __ Branch(&false_result, eq, scratch0, Operand(zero_reg)); |
| 1738 | __ And(scratch0, tos_, Operand(kSmiTagMask)); |
| 1739 | // "tos_" is a register and contains a non-zero value. Hence we implicitly |
| 1740 | // return true if the not equal condition is satisfied. |
| 1741 | __ Ret(eq, scratch0, Operand(zero_reg)); |
| 1742 | |
| 1743 | // 'null' -> false |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1744 | __ LoadRoot(scratch0, Heap::kNullValueRootIndex); |
| 1745 | __ Branch(&false_result, eq, tos_, Operand(scratch0)); |
| 1746 | |
| 1747 | // HeapNumber => false if +0, -0, or NaN. |
| 1748 | __ lw(scratch0, FieldMemOperand(tos_, HeapObject::kMapOffset)); |
| 1749 | __ LoadRoot(at, Heap::kHeapNumberMapRootIndex); |
| 1750 | __ Branch(¬_heap_number, ne, scratch0, Operand(at)); |
| 1751 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1752 | __ ldc1(f12, FieldMemOperand(tos_, HeapNumber::kValueOffset)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1753 | __ fcmp(f12, 0.0, UEQ); |
| 1754 | |
| 1755 | // "tos_" is a register, and contains a non zero value by default. |
| 1756 | // Hence we only need to overwrite "tos_" with zero to return false for |
| 1757 | // FP_ZERO or FP_NAN cases. Otherwise, by default it returns true. |
| 1758 | __ movt(tos_, zero_reg); |
| 1759 | __ Ret(); |
| 1760 | |
| 1761 | __ bind(¬_heap_number); |
| 1762 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1763 | // It can be an undetectable object. |
| 1764 | // Undetectable => false. |
| 1765 | __ lw(at, FieldMemOperand(tos_, HeapObject::kMapOffset)); |
| 1766 | __ lbu(scratch0, FieldMemOperand(at, Map::kBitFieldOffset)); |
| 1767 | __ And(scratch0, scratch0, Operand(1 << Map::kIsUndetectable)); |
| 1768 | __ Branch(&false_result, eq, scratch0, Operand(1 << Map::kIsUndetectable)); |
| 1769 | |
| 1770 | // JavaScript object => true. |
| 1771 | __ lw(scratch0, FieldMemOperand(tos_, HeapObject::kMapOffset)); |
| 1772 | __ lbu(scratch0, FieldMemOperand(scratch0, Map::kInstanceTypeOffset)); |
| 1773 | |
| 1774 | // "tos_" is a register and contains a non-zero value. |
| 1775 | // Hence we implicitly return true if the greater than |
| 1776 | // condition is satisfied. |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1777 | __ Ret(ge, scratch0, Operand(FIRST_SPEC_OBJECT_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1778 | |
| 1779 | // Check for string. |
| 1780 | __ lw(scratch0, FieldMemOperand(tos_, HeapObject::kMapOffset)); |
| 1781 | __ lbu(scratch0, FieldMemOperand(scratch0, Map::kInstanceTypeOffset)); |
| 1782 | // "tos_" is a register and contains a non-zero value. |
| 1783 | // Hence we implicitly return true if the greater than |
| 1784 | // condition is satisfied. |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 1785 | __ Ret(ge, scratch0, Operand(FIRST_NONSTRING_TYPE)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1786 | |
| 1787 | // String value => false iff empty, i.e., length is zero. |
| 1788 | __ lw(tos_, FieldMemOperand(tos_, String::kLengthOffset)); |
| 1789 | // If length is zero, "tos_" contains zero ==> false. |
| 1790 | // If length is not zero, "tos_" contains a non-zero value ==> true. |
| 1791 | __ Ret(); |
| 1792 | |
| 1793 | // Return 0 in "tos_" for false. |
| 1794 | __ bind(&false_result); |
| 1795 | __ mov(tos_, zero_reg); |
| 1796 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 1797 | } |
| 1798 | |
| 1799 | |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 1800 | void UnaryOpStub::PrintName(StringStream* stream) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1801 | const char* op_name = Token::Name(op_); |
| 1802 | const char* overwrite_name = NULL; // Make g++ happy. |
| 1803 | switch (mode_) { |
| 1804 | case UNARY_NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 1805 | case UNARY_OVERWRITE: overwrite_name = "Overwrite"; break; |
| 1806 | } |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 1807 | stream->Add("UnaryOpStub_%s_%s_%s", |
| 1808 | op_name, |
| 1809 | overwrite_name, |
| 1810 | UnaryOpIC::GetName(operand_type_)); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1811 | } |
| 1812 | |
| 1813 | |
| 1814 | // TODO(svenpanne): Use virtual functions instead of switch. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1815 | void UnaryOpStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1816 | switch (operand_type_) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1817 | case UnaryOpIC::UNINITIALIZED: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1818 | GenerateTypeTransition(masm); |
| 1819 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1820 | case UnaryOpIC::SMI: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1821 | GenerateSmiStub(masm); |
| 1822 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1823 | case UnaryOpIC::HEAP_NUMBER: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1824 | GenerateHeapNumberStub(masm); |
| 1825 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1826 | case UnaryOpIC::GENERIC: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1827 | GenerateGenericStub(masm); |
| 1828 | break; |
| 1829 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1830 | } |
| 1831 | |
| 1832 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1833 | void UnaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1834 | // Argument is in a0 and v0 at this point, so we can overwrite a0. |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1835 | __ li(a2, Operand(Smi::FromInt(op_))); |
| 1836 | __ li(a1, Operand(Smi::FromInt(mode_))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1837 | __ li(a0, Operand(Smi::FromInt(operand_type_))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1838 | __ Push(v0, a2, a1, a0); |
| 1839 | |
| 1840 | __ TailCallExternalReference( |
ricow@chromium.org | 4f693d6 | 2011-07-04 14:01:31 +0000 | [diff] [blame] | 1841 | ExternalReference(IC_Utility(IC::kUnaryOp_Patch), masm->isolate()), 4, 1); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1842 | } |
| 1843 | |
| 1844 | |
| 1845 | // TODO(svenpanne): Use virtual functions instead of switch. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1846 | void UnaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1847 | switch (op_) { |
| 1848 | case Token::SUB: |
| 1849 | GenerateSmiStubSub(masm); |
| 1850 | break; |
| 1851 | case Token::BIT_NOT: |
| 1852 | GenerateSmiStubBitNot(masm); |
| 1853 | break; |
| 1854 | default: |
| 1855 | UNREACHABLE(); |
| 1856 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1857 | } |
| 1858 | |
| 1859 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1860 | void UnaryOpStub::GenerateSmiStubSub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1861 | Label non_smi, slow; |
| 1862 | GenerateSmiCodeSub(masm, &non_smi, &slow); |
| 1863 | __ bind(&non_smi); |
| 1864 | __ bind(&slow); |
| 1865 | GenerateTypeTransition(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1866 | } |
| 1867 | |
| 1868 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1869 | void UnaryOpStub::GenerateSmiStubBitNot(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1870 | Label non_smi; |
| 1871 | GenerateSmiCodeBitNot(masm, &non_smi); |
| 1872 | __ bind(&non_smi); |
| 1873 | GenerateTypeTransition(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1874 | } |
| 1875 | |
| 1876 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1877 | void UnaryOpStub::GenerateSmiCodeSub(MacroAssembler* masm, |
| 1878 | Label* non_smi, |
| 1879 | Label* slow) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1880 | __ JumpIfNotSmi(a0, non_smi); |
| 1881 | |
| 1882 | // The result of negating zero or the smallest negative smi is not a smi. |
| 1883 | __ And(t0, a0, ~0x80000000); |
| 1884 | __ Branch(slow, eq, t0, Operand(zero_reg)); |
| 1885 | |
| 1886 | // Return '0 - value'. |
| 1887 | __ Subu(v0, zero_reg, a0); |
| 1888 | __ Ret(); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1889 | } |
| 1890 | |
| 1891 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1892 | void UnaryOpStub::GenerateSmiCodeBitNot(MacroAssembler* masm, |
| 1893 | Label* non_smi) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1894 | __ JumpIfNotSmi(a0, non_smi); |
| 1895 | |
| 1896 | // Flip bits and revert inverted smi-tag. |
| 1897 | __ Neg(v0, a0); |
| 1898 | __ And(v0, v0, ~kSmiTagMask); |
| 1899 | __ Ret(); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1900 | } |
| 1901 | |
| 1902 | |
| 1903 | // TODO(svenpanne): Use virtual functions instead of switch. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1904 | void UnaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1905 | switch (op_) { |
| 1906 | case Token::SUB: |
| 1907 | GenerateHeapNumberStubSub(masm); |
| 1908 | break; |
| 1909 | case Token::BIT_NOT: |
| 1910 | GenerateHeapNumberStubBitNot(masm); |
| 1911 | break; |
| 1912 | default: |
| 1913 | UNREACHABLE(); |
| 1914 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1915 | } |
| 1916 | |
| 1917 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1918 | void UnaryOpStub::GenerateHeapNumberStubSub(MacroAssembler* masm) { |
| 1919 | Label non_smi, slow, call_builtin; |
| 1920 | GenerateSmiCodeSub(masm, &non_smi, &call_builtin); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1921 | __ bind(&non_smi); |
| 1922 | GenerateHeapNumberCodeSub(masm, &slow); |
| 1923 | __ bind(&slow); |
| 1924 | GenerateTypeTransition(masm); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1925 | __ bind(&call_builtin); |
| 1926 | GenerateGenericCodeFallback(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1927 | } |
| 1928 | |
| 1929 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1930 | void UnaryOpStub::GenerateHeapNumberStubBitNot(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1931 | Label non_smi, slow; |
| 1932 | GenerateSmiCodeBitNot(masm, &non_smi); |
| 1933 | __ bind(&non_smi); |
| 1934 | GenerateHeapNumberCodeBitNot(masm, &slow); |
| 1935 | __ bind(&slow); |
| 1936 | GenerateTypeTransition(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1937 | } |
| 1938 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 1939 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1940 | void UnaryOpStub::GenerateHeapNumberCodeSub(MacroAssembler* masm, |
| 1941 | Label* slow) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1942 | EmitCheckForHeapNumber(masm, a0, a1, t2, slow); |
| 1943 | // a0 is a heap number. Get a new heap number in a1. |
| 1944 | if (mode_ == UNARY_OVERWRITE) { |
| 1945 | __ lw(a2, FieldMemOperand(a0, HeapNumber::kExponentOffset)); |
| 1946 | __ Xor(a2, a2, Operand(HeapNumber::kSignMask)); // Flip sign. |
| 1947 | __ sw(a2, FieldMemOperand(a0, HeapNumber::kExponentOffset)); |
| 1948 | } else { |
| 1949 | Label slow_allocate_heapnumber, heapnumber_allocated; |
| 1950 | __ AllocateHeapNumber(a1, a2, a3, t2, &slow_allocate_heapnumber); |
| 1951 | __ jmp(&heapnumber_allocated); |
| 1952 | |
| 1953 | __ bind(&slow_allocate_heapnumber); |
| 1954 | __ EnterInternalFrame(); |
| 1955 | __ push(a0); |
| 1956 | __ CallRuntime(Runtime::kNumberAlloc, 0); |
| 1957 | __ mov(a1, v0); |
| 1958 | __ pop(a0); |
| 1959 | __ LeaveInternalFrame(); |
| 1960 | |
| 1961 | __ bind(&heapnumber_allocated); |
| 1962 | __ lw(a3, FieldMemOperand(a0, HeapNumber::kMantissaOffset)); |
| 1963 | __ lw(a2, FieldMemOperand(a0, HeapNumber::kExponentOffset)); |
| 1964 | __ sw(a3, FieldMemOperand(a1, HeapNumber::kMantissaOffset)); |
| 1965 | __ Xor(a2, a2, Operand(HeapNumber::kSignMask)); // Flip sign. |
| 1966 | __ sw(a2, FieldMemOperand(a1, HeapNumber::kExponentOffset)); |
| 1967 | __ mov(v0, a1); |
| 1968 | } |
| 1969 | __ Ret(); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 1973 | void UnaryOpStub::GenerateHeapNumberCodeBitNot( |
| 1974 | MacroAssembler* masm, |
| 1975 | Label* slow) { |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 1976 | Label impossible; |
| 1977 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1978 | EmitCheckForHeapNumber(masm, a0, a1, t2, slow); |
| 1979 | // Convert the heap number in a0 to an untagged integer in a1. |
| 1980 | __ ConvertToInt32(a0, a1, a2, a3, f0, slow); |
| 1981 | |
| 1982 | // Do the bitwise operation and check if the result fits in a smi. |
| 1983 | Label try_float; |
| 1984 | __ Neg(a1, a1); |
| 1985 | __ Addu(a2, a1, Operand(0x40000000)); |
| 1986 | __ Branch(&try_float, lt, a2, Operand(zero_reg)); |
| 1987 | |
| 1988 | // Tag the result as a smi and we're done. |
| 1989 | __ SmiTag(v0, a1); |
| 1990 | __ Ret(); |
| 1991 | |
| 1992 | // Try to store the result in a heap number. |
| 1993 | __ bind(&try_float); |
| 1994 | if (mode_ == UNARY_NO_OVERWRITE) { |
| 1995 | Label slow_allocate_heapnumber, heapnumber_allocated; |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 1996 | // Allocate a new heap number without zapping v0, which we need if it fails. |
| 1997 | __ AllocateHeapNumber(a2, a3, t0, t2, &slow_allocate_heapnumber); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 1998 | __ jmp(&heapnumber_allocated); |
| 1999 | |
| 2000 | __ bind(&slow_allocate_heapnumber); |
| 2001 | __ EnterInternalFrame(); |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 2002 | __ push(v0); // Push the heap number, not the untagged int32. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2003 | __ CallRuntime(Runtime::kNumberAlloc, 0); |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 2004 | __ mov(a2, v0); // Move the new heap number into a2. |
| 2005 | // Get the heap number into v0, now that the new heap number is in a2. |
| 2006 | __ pop(v0); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2007 | __ LeaveInternalFrame(); |
| 2008 | |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 2009 | // Convert the heap number in v0 to an untagged integer in a1. |
| 2010 | // This can't go slow-case because it's the same number we already |
| 2011 | // converted once again. |
| 2012 | __ ConvertToInt32(v0, a1, a3, t0, f0, &impossible); |
| 2013 | // Negate the result. |
| 2014 | __ Xor(a1, a1, -1); |
| 2015 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2016 | __ bind(&heapnumber_allocated); |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 2017 | __ mov(v0, a2); // Move newly allocated heap number to v0. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2018 | } |
| 2019 | |
| 2020 | if (CpuFeatures::IsSupported(FPU)) { |
| 2021 | // Convert the int32 in a1 to the heap number in v0. a2 is corrupted. |
| 2022 | CpuFeatures::Scope scope(FPU); |
| 2023 | __ mtc1(a1, f0); |
| 2024 | __ cvt_d_w(f0, f0); |
| 2025 | __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset)); |
| 2026 | __ Ret(); |
| 2027 | } else { |
| 2028 | // WriteInt32ToHeapNumberStub does not trigger GC, so we do not |
| 2029 | // have to set up a frame. |
| 2030 | WriteInt32ToHeapNumberStub stub(a1, v0, a2, a3); |
| 2031 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2032 | } |
ricow@chromium.org | c54d365 | 2011-05-30 09:20:16 +0000 | [diff] [blame] | 2033 | |
| 2034 | __ bind(&impossible); |
| 2035 | if (FLAG_debug_code) { |
| 2036 | __ stop("Incorrect assumption in bit-not stub"); |
| 2037 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2038 | } |
| 2039 | |
| 2040 | |
| 2041 | // TODO(svenpanne): Use virtual functions instead of switch. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2042 | void UnaryOpStub::GenerateGenericStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2043 | switch (op_) { |
| 2044 | case Token::SUB: |
| 2045 | GenerateGenericStubSub(masm); |
| 2046 | break; |
| 2047 | case Token::BIT_NOT: |
| 2048 | GenerateGenericStubBitNot(masm); |
| 2049 | break; |
| 2050 | default: |
| 2051 | UNREACHABLE(); |
| 2052 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2053 | } |
| 2054 | |
| 2055 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2056 | void UnaryOpStub::GenerateGenericStubSub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2057 | Label non_smi, slow; |
| 2058 | GenerateSmiCodeSub(masm, &non_smi, &slow); |
| 2059 | __ bind(&non_smi); |
| 2060 | GenerateHeapNumberCodeSub(masm, &slow); |
| 2061 | __ bind(&slow); |
| 2062 | GenerateGenericCodeFallback(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2063 | } |
| 2064 | |
| 2065 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2066 | void UnaryOpStub::GenerateGenericStubBitNot(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2067 | Label non_smi, slow; |
| 2068 | GenerateSmiCodeBitNot(masm, &non_smi); |
| 2069 | __ bind(&non_smi); |
| 2070 | GenerateHeapNumberCodeBitNot(masm, &slow); |
| 2071 | __ bind(&slow); |
| 2072 | GenerateGenericCodeFallback(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2073 | } |
| 2074 | |
| 2075 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2076 | void UnaryOpStub::GenerateGenericCodeFallback( |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2077 | MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2078 | // Handle the slow case by jumping to the JavaScript builtin. |
| 2079 | __ push(a0); |
| 2080 | switch (op_) { |
| 2081 | case Token::SUB: |
| 2082 | __ InvokeBuiltin(Builtins::UNARY_MINUS, JUMP_FUNCTION); |
| 2083 | break; |
| 2084 | case Token::BIT_NOT: |
| 2085 | __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_FUNCTION); |
| 2086 | break; |
| 2087 | default: |
| 2088 | UNREACHABLE(); |
| 2089 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2090 | } |
| 2091 | |
| 2092 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2093 | void BinaryOpStub::GenerateTypeTransition(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2094 | Label get_result; |
| 2095 | |
| 2096 | __ Push(a1, a0); |
| 2097 | |
| 2098 | __ li(a2, Operand(Smi::FromInt(MinorKey()))); |
| 2099 | __ li(a1, Operand(Smi::FromInt(op_))); |
| 2100 | __ li(a0, Operand(Smi::FromInt(operands_type_))); |
| 2101 | __ Push(a2, a1, a0); |
| 2102 | |
| 2103 | __ TailCallExternalReference( |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2104 | ExternalReference(IC_Utility(IC::kBinaryOp_Patch), |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2105 | masm->isolate()), |
| 2106 | 5, |
| 2107 | 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2108 | } |
| 2109 | |
| 2110 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2111 | void BinaryOpStub::GenerateTypeTransitionWithSavedArgs( |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2112 | MacroAssembler* masm) { |
| 2113 | UNIMPLEMENTED(); |
| 2114 | } |
| 2115 | |
| 2116 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2117 | void BinaryOpStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2118 | switch (operands_type_) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2119 | case BinaryOpIC::UNINITIALIZED: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2120 | GenerateTypeTransition(masm); |
| 2121 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2122 | case BinaryOpIC::SMI: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2123 | GenerateSmiStub(masm); |
| 2124 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2125 | case BinaryOpIC::INT32: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2126 | GenerateInt32Stub(masm); |
| 2127 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2128 | case BinaryOpIC::HEAP_NUMBER: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2129 | GenerateHeapNumberStub(masm); |
| 2130 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2131 | case BinaryOpIC::ODDBALL: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2132 | GenerateOddballStub(masm); |
| 2133 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2134 | case BinaryOpIC::BOTH_STRING: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2135 | GenerateBothStringStub(masm); |
| 2136 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2137 | case BinaryOpIC::STRING: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2138 | GenerateStringStub(masm); |
| 2139 | break; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2140 | case BinaryOpIC::GENERIC: |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2141 | GenerateGeneric(masm); |
| 2142 | break; |
| 2143 | default: |
| 2144 | UNREACHABLE(); |
| 2145 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2146 | } |
| 2147 | |
| 2148 | |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 2149 | void BinaryOpStub::PrintName(StringStream* stream) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2150 | const char* op_name = Token::Name(op_); |
| 2151 | const char* overwrite_name; |
| 2152 | switch (mode_) { |
| 2153 | case NO_OVERWRITE: overwrite_name = "Alloc"; break; |
| 2154 | case OVERWRITE_RIGHT: overwrite_name = "OverwriteRight"; break; |
| 2155 | case OVERWRITE_LEFT: overwrite_name = "OverwriteLeft"; break; |
| 2156 | default: overwrite_name = "UnknownOverwrite"; break; |
| 2157 | } |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 2158 | stream->Add("BinaryOpStub_%s_%s_%s", |
| 2159 | op_name, |
| 2160 | overwrite_name, |
| 2161 | BinaryOpIC::GetName(operands_type_)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2162 | } |
| 2163 | |
| 2164 | |
| 2165 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2166 | void BinaryOpStub::GenerateSmiSmiOperation(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2167 | Register left = a1; |
| 2168 | Register right = a0; |
| 2169 | |
| 2170 | Register scratch1 = t0; |
| 2171 | Register scratch2 = t1; |
| 2172 | |
| 2173 | ASSERT(right.is(a0)); |
| 2174 | STATIC_ASSERT(kSmiTag == 0); |
| 2175 | |
| 2176 | Label not_smi_result; |
| 2177 | switch (op_) { |
| 2178 | case Token::ADD: |
| 2179 | __ AdduAndCheckForOverflow(v0, left, right, scratch1); |
| 2180 | __ RetOnNoOverflow(scratch1); |
| 2181 | // No need to revert anything - right and left are intact. |
| 2182 | break; |
| 2183 | case Token::SUB: |
| 2184 | __ SubuAndCheckForOverflow(v0, left, right, scratch1); |
| 2185 | __ RetOnNoOverflow(scratch1); |
| 2186 | // No need to revert anything - right and left are intact. |
| 2187 | break; |
| 2188 | case Token::MUL: { |
| 2189 | // Remove tag from one of the operands. This way the multiplication result |
| 2190 | // will be a smi if it fits the smi range. |
| 2191 | __ SmiUntag(scratch1, right); |
| 2192 | // Do multiplication. |
| 2193 | // lo = lower 32 bits of scratch1 * left. |
| 2194 | // hi = higher 32 bits of scratch1 * left. |
| 2195 | __ Mult(left, scratch1); |
| 2196 | // Check for overflowing the smi range - no overflow if higher 33 bits of |
| 2197 | // the result are identical. |
| 2198 | __ mflo(scratch1); |
| 2199 | __ mfhi(scratch2); |
| 2200 | __ sra(scratch1, scratch1, 31); |
| 2201 | __ Branch(¬_smi_result, ne, scratch1, Operand(scratch2)); |
| 2202 | // Go slow on zero result to handle -0. |
| 2203 | __ mflo(v0); |
| 2204 | __ Ret(ne, v0, Operand(zero_reg)); |
| 2205 | // We need -0 if we were multiplying a negative number with 0 to get 0. |
| 2206 | // We know one of them was zero. |
| 2207 | __ Addu(scratch2, right, left); |
| 2208 | Label skip; |
| 2209 | // ARM uses the 'pl' condition, which is 'ge'. |
| 2210 | // Negating it results in 'lt'. |
| 2211 | __ Branch(&skip, lt, scratch2, Operand(zero_reg)); |
| 2212 | ASSERT(Smi::FromInt(0) == 0); |
| 2213 | __ mov(v0, zero_reg); |
| 2214 | __ Ret(); // Return smi 0 if the non-zero one was positive. |
| 2215 | __ bind(&skip); |
| 2216 | // We fall through here if we multiplied a negative number with 0, because |
| 2217 | // that would mean we should produce -0. |
| 2218 | } |
| 2219 | break; |
| 2220 | case Token::DIV: { |
| 2221 | Label done; |
| 2222 | __ SmiUntag(scratch2, right); |
| 2223 | __ SmiUntag(scratch1, left); |
| 2224 | __ Div(scratch1, scratch2); |
| 2225 | // A minor optimization: div may be calculated asynchronously, so we check |
| 2226 | // for division by zero before getting the result. |
| 2227 | __ Branch(¬_smi_result, eq, scratch2, Operand(zero_reg)); |
| 2228 | // If the result is 0, we need to make sure the dividsor (right) is |
| 2229 | // positive, otherwise it is a -0 case. |
| 2230 | // Quotient is in 'lo', remainder is in 'hi'. |
| 2231 | // Check for no remainder first. |
| 2232 | __ mfhi(scratch1); |
| 2233 | __ Branch(¬_smi_result, ne, scratch1, Operand(zero_reg)); |
| 2234 | __ mflo(scratch1); |
| 2235 | __ Branch(&done, ne, scratch1, Operand(zero_reg)); |
| 2236 | __ Branch(¬_smi_result, lt, scratch2, Operand(zero_reg)); |
| 2237 | __ bind(&done); |
| 2238 | // Check that the signed result fits in a Smi. |
| 2239 | __ Addu(scratch2, scratch1, Operand(0x40000000)); |
| 2240 | __ Branch(¬_smi_result, lt, scratch2, Operand(zero_reg)); |
| 2241 | __ SmiTag(v0, scratch1); |
| 2242 | __ Ret(); |
| 2243 | } |
| 2244 | break; |
| 2245 | case Token::MOD: { |
| 2246 | Label done; |
| 2247 | __ SmiUntag(scratch2, right); |
| 2248 | __ SmiUntag(scratch1, left); |
| 2249 | __ Div(scratch1, scratch2); |
| 2250 | // A minor optimization: div may be calculated asynchronously, so we check |
| 2251 | // for division by 0 before calling mfhi. |
| 2252 | // Check for zero on the right hand side. |
| 2253 | __ Branch(¬_smi_result, eq, scratch2, Operand(zero_reg)); |
| 2254 | // If the result is 0, we need to make sure the dividend (left) is |
| 2255 | // positive (or 0), otherwise it is a -0 case. |
| 2256 | // Remainder is in 'hi'. |
| 2257 | __ mfhi(scratch2); |
| 2258 | __ Branch(&done, ne, scratch2, Operand(zero_reg)); |
| 2259 | __ Branch(¬_smi_result, lt, scratch1, Operand(zero_reg)); |
| 2260 | __ bind(&done); |
| 2261 | // Check that the signed result fits in a Smi. |
| 2262 | __ Addu(scratch1, scratch2, Operand(0x40000000)); |
| 2263 | __ Branch(¬_smi_result, lt, scratch1, Operand(zero_reg)); |
| 2264 | __ SmiTag(v0, scratch2); |
| 2265 | __ Ret(); |
| 2266 | } |
| 2267 | break; |
| 2268 | case Token::BIT_OR: |
| 2269 | __ Or(v0, left, Operand(right)); |
| 2270 | __ Ret(); |
| 2271 | break; |
| 2272 | case Token::BIT_AND: |
| 2273 | __ And(v0, left, Operand(right)); |
| 2274 | __ Ret(); |
| 2275 | break; |
| 2276 | case Token::BIT_XOR: |
| 2277 | __ Xor(v0, left, Operand(right)); |
| 2278 | __ Ret(); |
| 2279 | break; |
| 2280 | case Token::SAR: |
| 2281 | // Remove tags from right operand. |
| 2282 | __ GetLeastBitsFromSmi(scratch1, right, 5); |
| 2283 | __ srav(scratch1, left, scratch1); |
| 2284 | // Smi tag result. |
| 2285 | __ And(v0, scratch1, Operand(~kSmiTagMask)); |
| 2286 | __ Ret(); |
| 2287 | break; |
| 2288 | case Token::SHR: |
| 2289 | // Remove tags from operands. We can't do this on a 31 bit number |
| 2290 | // because then the 0s get shifted into bit 30 instead of bit 31. |
| 2291 | __ SmiUntag(scratch1, left); |
| 2292 | __ GetLeastBitsFromSmi(scratch2, right, 5); |
| 2293 | __ srlv(v0, scratch1, scratch2); |
| 2294 | // Unsigned shift is not allowed to produce a negative number, so |
| 2295 | // check the sign bit and the sign bit after Smi tagging. |
| 2296 | __ And(scratch1, v0, Operand(0xc0000000)); |
| 2297 | __ Branch(¬_smi_result, ne, scratch1, Operand(zero_reg)); |
| 2298 | // Smi tag result. |
| 2299 | __ SmiTag(v0); |
| 2300 | __ Ret(); |
| 2301 | break; |
| 2302 | case Token::SHL: |
| 2303 | // Remove tags from operands. |
| 2304 | __ SmiUntag(scratch1, left); |
| 2305 | __ GetLeastBitsFromSmi(scratch2, right, 5); |
| 2306 | __ sllv(scratch1, scratch1, scratch2); |
| 2307 | // Check that the signed result fits in a Smi. |
| 2308 | __ Addu(scratch2, scratch1, Operand(0x40000000)); |
| 2309 | __ Branch(¬_smi_result, lt, scratch2, Operand(zero_reg)); |
| 2310 | __ SmiTag(v0, scratch1); |
| 2311 | __ Ret(); |
| 2312 | break; |
| 2313 | default: |
| 2314 | UNREACHABLE(); |
| 2315 | } |
| 2316 | __ bind(¬_smi_result); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2320 | void BinaryOpStub::GenerateFPOperation(MacroAssembler* masm, |
| 2321 | bool smi_operands, |
| 2322 | Label* not_numbers, |
| 2323 | Label* gc_required) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2324 | Register left = a1; |
| 2325 | Register right = a0; |
| 2326 | Register scratch1 = t3; |
| 2327 | Register scratch2 = t5; |
| 2328 | Register scratch3 = t0; |
| 2329 | |
| 2330 | ASSERT(smi_operands || (not_numbers != NULL)); |
| 2331 | if (smi_operands && FLAG_debug_code) { |
| 2332 | __ AbortIfNotSmi(left); |
| 2333 | __ AbortIfNotSmi(right); |
| 2334 | } |
| 2335 | |
| 2336 | Register heap_number_map = t2; |
| 2337 | __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| 2338 | |
| 2339 | switch (op_) { |
| 2340 | case Token::ADD: |
| 2341 | case Token::SUB: |
| 2342 | case Token::MUL: |
| 2343 | case Token::DIV: |
| 2344 | case Token::MOD: { |
| 2345 | // Load left and right operands into f12 and f14 or a0/a1 and a2/a3 |
| 2346 | // depending on whether FPU is available or not. |
| 2347 | FloatingPointHelper::Destination destination = |
| 2348 | CpuFeatures::IsSupported(FPU) && |
| 2349 | op_ != Token::MOD ? |
| 2350 | FloatingPointHelper::kFPURegisters : |
| 2351 | FloatingPointHelper::kCoreRegisters; |
| 2352 | |
| 2353 | // Allocate new heap number for result. |
| 2354 | Register result = s0; |
| 2355 | GenerateHeapResultAllocation( |
| 2356 | masm, result, heap_number_map, scratch1, scratch2, gc_required); |
| 2357 | |
| 2358 | // Load the operands. |
| 2359 | if (smi_operands) { |
| 2360 | FloatingPointHelper::LoadSmis(masm, destination, scratch1, scratch2); |
| 2361 | } else { |
| 2362 | FloatingPointHelper::LoadOperands(masm, |
| 2363 | destination, |
| 2364 | heap_number_map, |
| 2365 | scratch1, |
| 2366 | scratch2, |
| 2367 | not_numbers); |
| 2368 | } |
| 2369 | |
| 2370 | // Calculate the result. |
| 2371 | if (destination == FloatingPointHelper::kFPURegisters) { |
| 2372 | // Using FPU registers: |
| 2373 | // f12: Left value. |
| 2374 | // f14: Right value. |
| 2375 | CpuFeatures::Scope scope(FPU); |
| 2376 | switch (op_) { |
| 2377 | case Token::ADD: |
| 2378 | __ add_d(f10, f12, f14); |
| 2379 | break; |
| 2380 | case Token::SUB: |
| 2381 | __ sub_d(f10, f12, f14); |
| 2382 | break; |
| 2383 | case Token::MUL: |
| 2384 | __ mul_d(f10, f12, f14); |
| 2385 | break; |
| 2386 | case Token::DIV: |
| 2387 | __ div_d(f10, f12, f14); |
| 2388 | break; |
| 2389 | default: |
| 2390 | UNREACHABLE(); |
| 2391 | } |
| 2392 | |
| 2393 | // ARM uses a workaround here because of the unaligned HeapNumber |
| 2394 | // kValueOffset. On MIPS this workaround is built into sdc1 so |
| 2395 | // there's no point in generating even more instructions. |
| 2396 | __ sdc1(f10, FieldMemOperand(result, HeapNumber::kValueOffset)); |
| 2397 | __ mov(v0, result); |
| 2398 | __ Ret(); |
| 2399 | } else { |
| 2400 | // Call the C function to handle the double operation. |
| 2401 | FloatingPointHelper::CallCCodeForDoubleOperation(masm, |
| 2402 | op_, |
| 2403 | result, |
| 2404 | scratch1); |
| 2405 | if (FLAG_debug_code) { |
| 2406 | __ stop("Unreachable code."); |
| 2407 | } |
| 2408 | } |
| 2409 | break; |
| 2410 | } |
| 2411 | case Token::BIT_OR: |
| 2412 | case Token::BIT_XOR: |
| 2413 | case Token::BIT_AND: |
| 2414 | case Token::SAR: |
| 2415 | case Token::SHR: |
| 2416 | case Token::SHL: { |
| 2417 | if (smi_operands) { |
| 2418 | __ SmiUntag(a3, left); |
| 2419 | __ SmiUntag(a2, right); |
| 2420 | } else { |
| 2421 | // Convert operands to 32-bit integers. Right in a2 and left in a3. |
| 2422 | FloatingPointHelper::ConvertNumberToInt32(masm, |
| 2423 | left, |
| 2424 | a3, |
| 2425 | heap_number_map, |
| 2426 | scratch1, |
| 2427 | scratch2, |
| 2428 | scratch3, |
| 2429 | f0, |
| 2430 | not_numbers); |
| 2431 | FloatingPointHelper::ConvertNumberToInt32(masm, |
| 2432 | right, |
| 2433 | a2, |
| 2434 | heap_number_map, |
| 2435 | scratch1, |
| 2436 | scratch2, |
| 2437 | scratch3, |
| 2438 | f0, |
| 2439 | not_numbers); |
| 2440 | } |
| 2441 | Label result_not_a_smi; |
| 2442 | switch (op_) { |
| 2443 | case Token::BIT_OR: |
| 2444 | __ Or(a2, a3, Operand(a2)); |
| 2445 | break; |
| 2446 | case Token::BIT_XOR: |
| 2447 | __ Xor(a2, a3, Operand(a2)); |
| 2448 | break; |
| 2449 | case Token::BIT_AND: |
| 2450 | __ And(a2, a3, Operand(a2)); |
| 2451 | break; |
| 2452 | case Token::SAR: |
| 2453 | // Use only the 5 least significant bits of the shift count. |
| 2454 | __ GetLeastBitsFromInt32(a2, a2, 5); |
| 2455 | __ srav(a2, a3, a2); |
| 2456 | break; |
| 2457 | case Token::SHR: |
| 2458 | // Use only the 5 least significant bits of the shift count. |
| 2459 | __ GetLeastBitsFromInt32(a2, a2, 5); |
| 2460 | __ srlv(a2, a3, a2); |
| 2461 | // SHR is special because it is required to produce a positive answer. |
| 2462 | // The code below for writing into heap numbers isn't capable of |
| 2463 | // writing the register as an unsigned int so we go to slow case if we |
| 2464 | // hit this case. |
| 2465 | if (CpuFeatures::IsSupported(FPU)) { |
| 2466 | __ Branch(&result_not_a_smi, lt, a2, Operand(zero_reg)); |
| 2467 | } else { |
| 2468 | __ Branch(not_numbers, lt, a2, Operand(zero_reg)); |
| 2469 | } |
| 2470 | break; |
| 2471 | case Token::SHL: |
| 2472 | // Use only the 5 least significant bits of the shift count. |
| 2473 | __ GetLeastBitsFromInt32(a2, a2, 5); |
| 2474 | __ sllv(a2, a3, a2); |
| 2475 | break; |
| 2476 | default: |
| 2477 | UNREACHABLE(); |
| 2478 | } |
| 2479 | // Check that the *signed* result fits in a smi. |
| 2480 | __ Addu(a3, a2, Operand(0x40000000)); |
| 2481 | __ Branch(&result_not_a_smi, lt, a3, Operand(zero_reg)); |
| 2482 | __ SmiTag(v0, a2); |
| 2483 | __ Ret(); |
| 2484 | |
| 2485 | // Allocate new heap number for result. |
| 2486 | __ bind(&result_not_a_smi); |
| 2487 | Register result = t1; |
| 2488 | if (smi_operands) { |
| 2489 | __ AllocateHeapNumber( |
| 2490 | result, scratch1, scratch2, heap_number_map, gc_required); |
| 2491 | } else { |
| 2492 | GenerateHeapResultAllocation( |
| 2493 | masm, result, heap_number_map, scratch1, scratch2, gc_required); |
| 2494 | } |
| 2495 | |
| 2496 | // a2: Answer as signed int32. |
| 2497 | // t1: Heap number to write answer into. |
| 2498 | |
| 2499 | // Nothing can go wrong now, so move the heap number to v0, which is the |
| 2500 | // result. |
| 2501 | __ mov(v0, t1); |
| 2502 | |
| 2503 | if (CpuFeatures::IsSupported(FPU)) { |
| 2504 | // Convert the int32 in a2 to the heap number in a0. As |
| 2505 | // mentioned above SHR needs to always produce a positive result. |
| 2506 | CpuFeatures::Scope scope(FPU); |
| 2507 | __ mtc1(a2, f0); |
| 2508 | if (op_ == Token::SHR) { |
| 2509 | __ Cvt_d_uw(f0, f0); |
| 2510 | } else { |
| 2511 | __ cvt_d_w(f0, f0); |
| 2512 | } |
| 2513 | // ARM uses a workaround here because of the unaligned HeapNumber |
| 2514 | // kValueOffset. On MIPS this workaround is built into sdc1 so |
| 2515 | // there's no point in generating even more instructions. |
| 2516 | __ sdc1(f0, FieldMemOperand(v0, HeapNumber::kValueOffset)); |
| 2517 | __ Ret(); |
| 2518 | } else { |
| 2519 | // Tail call that writes the int32 in a2 to the heap number in v0, using |
| 2520 | // a3 and a0 as scratch. v0 is preserved and returned. |
| 2521 | WriteInt32ToHeapNumberStub stub(a2, v0, a3, a0); |
| 2522 | __ TailCallStub(&stub); |
| 2523 | } |
| 2524 | break; |
| 2525 | } |
| 2526 | default: |
| 2527 | UNREACHABLE(); |
| 2528 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2529 | } |
| 2530 | |
| 2531 | |
| 2532 | // Generate the smi code. If the operation on smis are successful this return is |
| 2533 | // generated. If the result is not a smi and heap number allocation is not |
| 2534 | // requested the code falls through. If number allocation is requested but a |
| 2535 | // heap number cannot be allocated the code jumps to the lable gc_required. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2536 | void BinaryOpStub::GenerateSmiCode( |
| 2537 | MacroAssembler* masm, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 2538 | Label* use_runtime, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2539 | Label* gc_required, |
| 2540 | SmiCodeGenerateHeapNumberResults allow_heapnumber_results) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2541 | Label not_smis; |
| 2542 | |
| 2543 | Register left = a1; |
| 2544 | Register right = a0; |
| 2545 | Register scratch1 = t3; |
| 2546 | Register scratch2 = t5; |
| 2547 | |
| 2548 | // Perform combined smi check on both operands. |
| 2549 | __ Or(scratch1, left, Operand(right)); |
| 2550 | STATIC_ASSERT(kSmiTag == 0); |
| 2551 | __ JumpIfNotSmi(scratch1, ¬_smis); |
| 2552 | |
| 2553 | // If the smi-smi operation results in a smi return is generated. |
| 2554 | GenerateSmiSmiOperation(masm); |
| 2555 | |
| 2556 | // If heap number results are possible generate the result in an allocated |
| 2557 | // heap number. |
| 2558 | if (allow_heapnumber_results == ALLOW_HEAPNUMBER_RESULTS) { |
| 2559 | GenerateFPOperation(masm, true, use_runtime, gc_required); |
| 2560 | } |
| 2561 | __ bind(¬_smis); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2562 | } |
| 2563 | |
| 2564 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2565 | void BinaryOpStub::GenerateSmiStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2566 | Label not_smis, call_runtime; |
| 2567 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2568 | if (result_type_ == BinaryOpIC::UNINITIALIZED || |
| 2569 | result_type_ == BinaryOpIC::SMI) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2570 | // Only allow smi results. |
| 2571 | GenerateSmiCode(masm, &call_runtime, NULL, NO_HEAPNUMBER_RESULTS); |
| 2572 | } else { |
| 2573 | // Allow heap number result and don't make a transition if a heap number |
| 2574 | // cannot be allocated. |
| 2575 | GenerateSmiCode(masm, |
| 2576 | &call_runtime, |
| 2577 | &call_runtime, |
| 2578 | ALLOW_HEAPNUMBER_RESULTS); |
| 2579 | } |
| 2580 | |
| 2581 | // Code falls through if the result is not returned as either a smi or heap |
| 2582 | // number. |
| 2583 | GenerateTypeTransition(masm); |
| 2584 | |
| 2585 | __ bind(&call_runtime); |
| 2586 | GenerateCallRuntime(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2587 | } |
| 2588 | |
| 2589 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2590 | void BinaryOpStub::GenerateStringStub(MacroAssembler* masm) { |
| 2591 | ASSERT(operands_type_ == BinaryOpIC::STRING); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2592 | // Try to add arguments as strings, otherwise, transition to the generic |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2593 | // BinaryOpIC type. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2594 | GenerateAddStrings(masm); |
| 2595 | GenerateTypeTransition(masm); |
| 2596 | } |
| 2597 | |
| 2598 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2599 | void BinaryOpStub::GenerateBothStringStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2600 | Label call_runtime; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2601 | ASSERT(operands_type_ == BinaryOpIC::BOTH_STRING); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2602 | ASSERT(op_ == Token::ADD); |
| 2603 | // If both arguments are strings, call the string add stub. |
| 2604 | // Otherwise, do a transition. |
| 2605 | |
| 2606 | // Registers containing left and right operands respectively. |
| 2607 | Register left = a1; |
| 2608 | Register right = a0; |
| 2609 | |
| 2610 | // Test if left operand is a string. |
| 2611 | __ JumpIfSmi(left, &call_runtime); |
| 2612 | __ GetObjectType(left, a2, a2); |
| 2613 | __ Branch(&call_runtime, ge, a2, Operand(FIRST_NONSTRING_TYPE)); |
| 2614 | |
| 2615 | // Test if right operand is a string. |
| 2616 | __ JumpIfSmi(right, &call_runtime); |
| 2617 | __ GetObjectType(right, a2, a2); |
| 2618 | __ Branch(&call_runtime, ge, a2, Operand(FIRST_NONSTRING_TYPE)); |
| 2619 | |
| 2620 | StringAddStub string_add_stub(NO_STRING_CHECK_IN_STUB); |
| 2621 | GenerateRegisterArgsPush(masm); |
| 2622 | __ TailCallStub(&string_add_stub); |
| 2623 | |
| 2624 | __ bind(&call_runtime); |
| 2625 | GenerateTypeTransition(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2626 | } |
| 2627 | |
| 2628 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2629 | void BinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) { |
| 2630 | ASSERT(operands_type_ == BinaryOpIC::INT32); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2631 | |
| 2632 | Register left = a1; |
| 2633 | Register right = a0; |
| 2634 | Register scratch1 = t3; |
| 2635 | Register scratch2 = t5; |
| 2636 | FPURegister double_scratch = f0; |
| 2637 | FPURegister single_scratch = f6; |
| 2638 | |
| 2639 | Register heap_number_result = no_reg; |
| 2640 | Register heap_number_map = t2; |
| 2641 | __ LoadRoot(heap_number_map, Heap::kHeapNumberMapRootIndex); |
| 2642 | |
| 2643 | Label call_runtime; |
| 2644 | // Labels for type transition, used for wrong input or output types. |
| 2645 | // Both label are currently actually bound to the same position. We use two |
| 2646 | // different label to differentiate the cause leading to type transition. |
| 2647 | Label transition; |
| 2648 | |
| 2649 | // Smi-smi fast case. |
| 2650 | Label skip; |
| 2651 | __ Or(scratch1, left, right); |
| 2652 | __ JumpIfNotSmi(scratch1, &skip); |
| 2653 | GenerateSmiSmiOperation(masm); |
| 2654 | // Fall through if the result is not a smi. |
| 2655 | __ bind(&skip); |
| 2656 | |
| 2657 | switch (op_) { |
| 2658 | case Token::ADD: |
| 2659 | case Token::SUB: |
| 2660 | case Token::MUL: |
| 2661 | case Token::DIV: |
| 2662 | case Token::MOD: { |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2663 | // Load both operands and check that they are 32-bit integer. |
| 2664 | // Jump to type transition if they are not. The registers a0 and a1 (right |
| 2665 | // and left) are preserved for the runtime call. |
| 2666 | FloatingPointHelper::Destination destination = |
| 2667 | (CpuFeatures::IsSupported(FPU) && op_ != Token::MOD) |
| 2668 | ? FloatingPointHelper::kFPURegisters |
| 2669 | : FloatingPointHelper::kCoreRegisters; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2670 | |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2671 | FloatingPointHelper::LoadNumberAsInt32Double(masm, |
| 2672 | right, |
| 2673 | destination, |
| 2674 | f14, |
| 2675 | a2, |
| 2676 | a3, |
| 2677 | heap_number_map, |
| 2678 | scratch1, |
| 2679 | scratch2, |
| 2680 | f2, |
| 2681 | &transition); |
| 2682 | FloatingPointHelper::LoadNumberAsInt32Double(masm, |
| 2683 | left, |
| 2684 | destination, |
| 2685 | f12, |
| 2686 | t0, |
| 2687 | t1, |
| 2688 | heap_number_map, |
| 2689 | scratch1, |
| 2690 | scratch2, |
| 2691 | f2, |
| 2692 | &transition); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2693 | |
| 2694 | if (destination == FloatingPointHelper::kFPURegisters) { |
| 2695 | CpuFeatures::Scope scope(FPU); |
| 2696 | Label return_heap_number; |
| 2697 | switch (op_) { |
| 2698 | case Token::ADD: |
| 2699 | __ add_d(f10, f12, f14); |
| 2700 | break; |
| 2701 | case Token::SUB: |
| 2702 | __ sub_d(f10, f12, f14); |
| 2703 | break; |
| 2704 | case Token::MUL: |
| 2705 | __ mul_d(f10, f12, f14); |
| 2706 | break; |
| 2707 | case Token::DIV: |
| 2708 | __ div_d(f10, f12, f14); |
| 2709 | break; |
| 2710 | default: |
| 2711 | UNREACHABLE(); |
| 2712 | } |
| 2713 | |
| 2714 | if (op_ != Token::DIV) { |
| 2715 | // These operations produce an integer result. |
| 2716 | // Try to return a smi if we can. |
| 2717 | // Otherwise return a heap number if allowed, or jump to type |
| 2718 | // transition. |
| 2719 | |
| 2720 | // NOTE: ARM uses a MacroAssembler function here (EmitVFPTruncate). |
| 2721 | // On MIPS a lot of things cannot be implemented the same way so right |
| 2722 | // now it makes a lot more sense to just do things manually. |
| 2723 | |
| 2724 | // Save FCSR. |
| 2725 | __ cfc1(scratch1, FCSR); |
| 2726 | // Disable FPU exceptions. |
| 2727 | __ ctc1(zero_reg, FCSR); |
| 2728 | __ trunc_w_d(single_scratch, f10); |
| 2729 | // Retrieve FCSR. |
| 2730 | __ cfc1(scratch2, FCSR); |
| 2731 | // Restore FCSR. |
| 2732 | __ ctc1(scratch1, FCSR); |
| 2733 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 2734 | // Check for inexact conversion or exception. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2735 | __ And(scratch2, scratch2, kFCSRFlagMask); |
| 2736 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2737 | if (result_type_ <= BinaryOpIC::INT32) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2738 | // If scratch2 != 0, result does not fit in a 32-bit integer. |
| 2739 | __ Branch(&transition, ne, scratch2, Operand(zero_reg)); |
| 2740 | } |
| 2741 | |
| 2742 | // Check if the result fits in a smi. |
| 2743 | __ mfc1(scratch1, single_scratch); |
| 2744 | __ Addu(scratch2, scratch1, Operand(0x40000000)); |
| 2745 | // If not try to return a heap number. |
| 2746 | __ Branch(&return_heap_number, lt, scratch2, Operand(zero_reg)); |
| 2747 | // Check for minus zero. Return heap number for minus zero. |
| 2748 | Label not_zero; |
| 2749 | __ Branch(¬_zero, ne, scratch1, Operand(zero_reg)); |
| 2750 | __ mfc1(scratch2, f11); |
| 2751 | __ And(scratch2, scratch2, HeapNumber::kSignMask); |
| 2752 | __ Branch(&return_heap_number, ne, scratch2, Operand(zero_reg)); |
| 2753 | __ bind(¬_zero); |
| 2754 | |
| 2755 | // Tag the result and return. |
| 2756 | __ SmiTag(v0, scratch1); |
| 2757 | __ Ret(); |
| 2758 | } else { |
| 2759 | // DIV just falls through to allocating a heap number. |
| 2760 | } |
| 2761 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 2762 | __ bind(&return_heap_number); |
| 2763 | // Return a heap number, or fall through to type transition or runtime |
| 2764 | // call if we can't. |
whesse@chromium.org | 7b26015 | 2011-06-20 15:33:18 +0000 | [diff] [blame] | 2765 | if (result_type_ >= ((op_ == Token::DIV) ? BinaryOpIC::HEAP_NUMBER |
| 2766 | : BinaryOpIC::INT32)) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2767 | // We are using FPU registers so s0 is available. |
| 2768 | heap_number_result = s0; |
| 2769 | GenerateHeapResultAllocation(masm, |
| 2770 | heap_number_result, |
| 2771 | heap_number_map, |
| 2772 | scratch1, |
| 2773 | scratch2, |
| 2774 | &call_runtime); |
| 2775 | __ mov(v0, heap_number_result); |
| 2776 | __ sdc1(f10, FieldMemOperand(v0, HeapNumber::kValueOffset)); |
| 2777 | __ Ret(); |
| 2778 | } |
| 2779 | |
| 2780 | // A DIV operation expecting an integer result falls through |
| 2781 | // to type transition. |
| 2782 | |
| 2783 | } else { |
| 2784 | // We preserved a0 and a1 to be able to call runtime. |
| 2785 | // Save the left value on the stack. |
| 2786 | __ Push(t1, t0); |
| 2787 | |
| 2788 | Label pop_and_call_runtime; |
| 2789 | |
| 2790 | // Allocate a heap number to store the result. |
| 2791 | heap_number_result = s0; |
| 2792 | GenerateHeapResultAllocation(masm, |
| 2793 | heap_number_result, |
| 2794 | heap_number_map, |
| 2795 | scratch1, |
| 2796 | scratch2, |
| 2797 | &pop_and_call_runtime); |
| 2798 | |
| 2799 | // Load the left value from the value saved on the stack. |
| 2800 | __ Pop(a1, a0); |
| 2801 | |
| 2802 | // Call the C function to handle the double operation. |
| 2803 | FloatingPointHelper::CallCCodeForDoubleOperation( |
| 2804 | masm, op_, heap_number_result, scratch1); |
| 2805 | if (FLAG_debug_code) { |
| 2806 | __ stop("Unreachable code."); |
| 2807 | } |
| 2808 | |
| 2809 | __ bind(&pop_and_call_runtime); |
| 2810 | __ Drop(2); |
| 2811 | __ Branch(&call_runtime); |
| 2812 | } |
| 2813 | |
| 2814 | break; |
| 2815 | } |
| 2816 | |
| 2817 | case Token::BIT_OR: |
| 2818 | case Token::BIT_XOR: |
| 2819 | case Token::BIT_AND: |
| 2820 | case Token::SAR: |
| 2821 | case Token::SHR: |
| 2822 | case Token::SHL: { |
| 2823 | Label return_heap_number; |
| 2824 | Register scratch3 = t1; |
| 2825 | // Convert operands to 32-bit integers. Right in a2 and left in a3. The |
| 2826 | // registers a0 and a1 (right and left) are preserved for the runtime |
| 2827 | // call. |
| 2828 | FloatingPointHelper::LoadNumberAsInt32(masm, |
| 2829 | left, |
| 2830 | a3, |
| 2831 | heap_number_map, |
| 2832 | scratch1, |
| 2833 | scratch2, |
| 2834 | scratch3, |
| 2835 | f0, |
| 2836 | &transition); |
| 2837 | FloatingPointHelper::LoadNumberAsInt32(masm, |
| 2838 | right, |
| 2839 | a2, |
| 2840 | heap_number_map, |
| 2841 | scratch1, |
| 2842 | scratch2, |
| 2843 | scratch3, |
| 2844 | f0, |
| 2845 | &transition); |
| 2846 | |
| 2847 | // The ECMA-262 standard specifies that, for shift operations, only the |
| 2848 | // 5 least significant bits of the shift value should be used. |
| 2849 | switch (op_) { |
| 2850 | case Token::BIT_OR: |
| 2851 | __ Or(a2, a3, Operand(a2)); |
| 2852 | break; |
| 2853 | case Token::BIT_XOR: |
| 2854 | __ Xor(a2, a3, Operand(a2)); |
| 2855 | break; |
| 2856 | case Token::BIT_AND: |
| 2857 | __ And(a2, a3, Operand(a2)); |
| 2858 | break; |
| 2859 | case Token::SAR: |
| 2860 | __ And(a2, a2, Operand(0x1f)); |
| 2861 | __ srav(a2, a3, a2); |
| 2862 | break; |
| 2863 | case Token::SHR: |
| 2864 | __ And(a2, a2, Operand(0x1f)); |
| 2865 | __ srlv(a2, a3, a2); |
| 2866 | // SHR is special because it is required to produce a positive answer. |
| 2867 | // We only get a negative result if the shift value (a2) is 0. |
| 2868 | // This result cannot be respresented as a signed 32-bit integer, try |
| 2869 | // to return a heap number if we can. |
| 2870 | // The non FPU code does not support this special case, so jump to |
| 2871 | // runtime if we don't support it. |
| 2872 | if (CpuFeatures::IsSupported(FPU)) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2873 | __ Branch((result_type_ <= BinaryOpIC::INT32) |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2874 | ? &transition |
| 2875 | : &return_heap_number, |
| 2876 | lt, |
| 2877 | a2, |
| 2878 | Operand(zero_reg)); |
| 2879 | } else { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2880 | __ Branch((result_type_ <= BinaryOpIC::INT32) |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2881 | ? &transition |
| 2882 | : &call_runtime, |
| 2883 | lt, |
| 2884 | a2, |
| 2885 | Operand(zero_reg)); |
| 2886 | } |
| 2887 | break; |
| 2888 | case Token::SHL: |
| 2889 | __ And(a2, a2, Operand(0x1f)); |
| 2890 | __ sllv(a2, a3, a2); |
| 2891 | break; |
| 2892 | default: |
| 2893 | UNREACHABLE(); |
| 2894 | } |
| 2895 | |
| 2896 | // Check if the result fits in a smi. |
| 2897 | __ Addu(scratch1, a2, Operand(0x40000000)); |
| 2898 | // If not try to return a heap number. (We know the result is an int32.) |
| 2899 | __ Branch(&return_heap_number, lt, scratch1, Operand(zero_reg)); |
| 2900 | // Tag the result and return. |
| 2901 | __ SmiTag(v0, a2); |
| 2902 | __ Ret(); |
| 2903 | |
| 2904 | __ bind(&return_heap_number); |
| 2905 | heap_number_result = t1; |
| 2906 | GenerateHeapResultAllocation(masm, |
| 2907 | heap_number_result, |
| 2908 | heap_number_map, |
| 2909 | scratch1, |
| 2910 | scratch2, |
| 2911 | &call_runtime); |
| 2912 | |
| 2913 | if (CpuFeatures::IsSupported(FPU)) { |
| 2914 | CpuFeatures::Scope scope(FPU); |
| 2915 | |
| 2916 | if (op_ != Token::SHR) { |
| 2917 | // Convert the result to a floating point value. |
| 2918 | __ mtc1(a2, double_scratch); |
| 2919 | __ cvt_d_w(double_scratch, double_scratch); |
| 2920 | } else { |
| 2921 | // The result must be interpreted as an unsigned 32-bit integer. |
| 2922 | __ mtc1(a2, double_scratch); |
| 2923 | __ Cvt_d_uw(double_scratch, double_scratch); |
| 2924 | } |
| 2925 | |
| 2926 | // Store the result. |
| 2927 | __ mov(v0, heap_number_result); |
| 2928 | __ sdc1(double_scratch, FieldMemOperand(v0, HeapNumber::kValueOffset)); |
| 2929 | __ Ret(); |
| 2930 | } else { |
| 2931 | // Tail call that writes the int32 in a2 to the heap number in v0, using |
| 2932 | // a3 and a1 as scratch. v0 is preserved and returned. |
| 2933 | __ mov(a0, t1); |
| 2934 | WriteInt32ToHeapNumberStub stub(a2, v0, a3, a1); |
| 2935 | __ TailCallStub(&stub); |
| 2936 | } |
| 2937 | |
| 2938 | break; |
| 2939 | } |
| 2940 | |
| 2941 | default: |
| 2942 | UNREACHABLE(); |
| 2943 | } |
| 2944 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 2945 | // We never expect DIV to yield an integer result, so we always generate |
| 2946 | // type transition code for DIV operations expecting an integer result: the |
| 2947 | // code will fall through to this type transition. |
| 2948 | if (transition.is_linked() || |
| 2949 | ((op_ == Token::DIV) && (result_type_ <= BinaryOpIC::INT32))) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2950 | __ bind(&transition); |
| 2951 | GenerateTypeTransition(masm); |
| 2952 | } |
| 2953 | |
| 2954 | __ bind(&call_runtime); |
| 2955 | GenerateCallRuntime(masm); |
| 2956 | } |
| 2957 | |
| 2958 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2959 | void BinaryOpStub::GenerateOddballStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2960 | Label call_runtime; |
| 2961 | |
| 2962 | if (op_ == Token::ADD) { |
| 2963 | // Handle string addition here, because it is the only operation |
| 2964 | // that does not do a ToNumber conversion on the operands. |
| 2965 | GenerateAddStrings(masm); |
| 2966 | } |
| 2967 | |
| 2968 | // Convert oddball arguments to numbers. |
| 2969 | Label check, done; |
| 2970 | __ LoadRoot(t0, Heap::kUndefinedValueRootIndex); |
| 2971 | __ Branch(&check, ne, a1, Operand(t0)); |
| 2972 | if (Token::IsBitOp(op_)) { |
| 2973 | __ li(a1, Operand(Smi::FromInt(0))); |
| 2974 | } else { |
| 2975 | __ LoadRoot(a1, Heap::kNanValueRootIndex); |
| 2976 | } |
| 2977 | __ jmp(&done); |
| 2978 | __ bind(&check); |
| 2979 | __ LoadRoot(t0, Heap::kUndefinedValueRootIndex); |
| 2980 | __ Branch(&done, ne, a0, Operand(t0)); |
| 2981 | if (Token::IsBitOp(op_)) { |
| 2982 | __ li(a0, Operand(Smi::FromInt(0))); |
| 2983 | } else { |
| 2984 | __ LoadRoot(a0, Heap::kNanValueRootIndex); |
| 2985 | } |
| 2986 | __ bind(&done); |
| 2987 | |
| 2988 | GenerateHeapNumberStub(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2989 | } |
| 2990 | |
| 2991 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 2992 | void BinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 2993 | Label call_runtime; |
| 2994 | GenerateFPOperation(masm, false, &call_runtime, &call_runtime); |
| 2995 | |
| 2996 | __ bind(&call_runtime); |
| 2997 | GenerateCallRuntime(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 2998 | } |
| 2999 | |
| 3000 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3001 | void BinaryOpStub::GenerateGeneric(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3002 | Label call_runtime, call_string_add_or_runtime; |
| 3003 | |
| 3004 | GenerateSmiCode(masm, &call_runtime, &call_runtime, ALLOW_HEAPNUMBER_RESULTS); |
| 3005 | |
| 3006 | GenerateFPOperation(masm, false, &call_string_add_or_runtime, &call_runtime); |
| 3007 | |
| 3008 | __ bind(&call_string_add_or_runtime); |
| 3009 | if (op_ == Token::ADD) { |
| 3010 | GenerateAddStrings(masm); |
| 3011 | } |
| 3012 | |
| 3013 | __ bind(&call_runtime); |
| 3014 | GenerateCallRuntime(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3015 | } |
| 3016 | |
| 3017 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3018 | void BinaryOpStub::GenerateAddStrings(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3019 | ASSERT(op_ == Token::ADD); |
| 3020 | Label left_not_string, call_runtime; |
| 3021 | |
| 3022 | Register left = a1; |
| 3023 | Register right = a0; |
| 3024 | |
| 3025 | // Check if left argument is a string. |
| 3026 | __ JumpIfSmi(left, &left_not_string); |
| 3027 | __ GetObjectType(left, a2, a2); |
| 3028 | __ Branch(&left_not_string, ge, a2, Operand(FIRST_NONSTRING_TYPE)); |
| 3029 | |
| 3030 | StringAddStub string_add_left_stub(NO_STRING_CHECK_LEFT_IN_STUB); |
| 3031 | GenerateRegisterArgsPush(masm); |
| 3032 | __ TailCallStub(&string_add_left_stub); |
| 3033 | |
| 3034 | // Left operand is not a string, test right. |
| 3035 | __ bind(&left_not_string); |
| 3036 | __ JumpIfSmi(right, &call_runtime); |
| 3037 | __ GetObjectType(right, a2, a2); |
| 3038 | __ Branch(&call_runtime, ge, a2, Operand(FIRST_NONSTRING_TYPE)); |
| 3039 | |
| 3040 | StringAddStub string_add_right_stub(NO_STRING_CHECK_RIGHT_IN_STUB); |
| 3041 | GenerateRegisterArgsPush(masm); |
| 3042 | __ TailCallStub(&string_add_right_stub); |
| 3043 | |
| 3044 | // At least one argument is not a string. |
| 3045 | __ bind(&call_runtime); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3046 | } |
| 3047 | |
| 3048 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3049 | void BinaryOpStub::GenerateCallRuntime(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3050 | GenerateRegisterArgsPush(masm); |
| 3051 | switch (op_) { |
| 3052 | case Token::ADD: |
| 3053 | __ InvokeBuiltin(Builtins::ADD, JUMP_FUNCTION); |
| 3054 | break; |
| 3055 | case Token::SUB: |
| 3056 | __ InvokeBuiltin(Builtins::SUB, JUMP_FUNCTION); |
| 3057 | break; |
| 3058 | case Token::MUL: |
| 3059 | __ InvokeBuiltin(Builtins::MUL, JUMP_FUNCTION); |
| 3060 | break; |
| 3061 | case Token::DIV: |
| 3062 | __ InvokeBuiltin(Builtins::DIV, JUMP_FUNCTION); |
| 3063 | break; |
| 3064 | case Token::MOD: |
| 3065 | __ InvokeBuiltin(Builtins::MOD, JUMP_FUNCTION); |
| 3066 | break; |
| 3067 | case Token::BIT_OR: |
| 3068 | __ InvokeBuiltin(Builtins::BIT_OR, JUMP_FUNCTION); |
| 3069 | break; |
| 3070 | case Token::BIT_AND: |
| 3071 | __ InvokeBuiltin(Builtins::BIT_AND, JUMP_FUNCTION); |
| 3072 | break; |
| 3073 | case Token::BIT_XOR: |
| 3074 | __ InvokeBuiltin(Builtins::BIT_XOR, JUMP_FUNCTION); |
| 3075 | break; |
| 3076 | case Token::SAR: |
| 3077 | __ InvokeBuiltin(Builtins::SAR, JUMP_FUNCTION); |
| 3078 | break; |
| 3079 | case Token::SHR: |
| 3080 | __ InvokeBuiltin(Builtins::SHR, JUMP_FUNCTION); |
| 3081 | break; |
| 3082 | case Token::SHL: |
| 3083 | __ InvokeBuiltin(Builtins::SHL, JUMP_FUNCTION); |
| 3084 | break; |
| 3085 | default: |
| 3086 | UNREACHABLE(); |
| 3087 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3088 | } |
| 3089 | |
| 3090 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3091 | void BinaryOpStub::GenerateHeapResultAllocation( |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3092 | MacroAssembler* masm, |
| 3093 | Register result, |
| 3094 | Register heap_number_map, |
| 3095 | Register scratch1, |
| 3096 | Register scratch2, |
| 3097 | Label* gc_required) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3098 | |
| 3099 | // Code below will scratch result if allocation fails. To keep both arguments |
| 3100 | // intact for the runtime call result cannot be one of these. |
| 3101 | ASSERT(!result.is(a0) && !result.is(a1)); |
| 3102 | |
| 3103 | if (mode_ == OVERWRITE_LEFT || mode_ == OVERWRITE_RIGHT) { |
| 3104 | Label skip_allocation, allocated; |
| 3105 | Register overwritable_operand = mode_ == OVERWRITE_LEFT ? a1 : a0; |
| 3106 | // If the overwritable operand is already an object, we skip the |
| 3107 | // allocation of a heap number. |
| 3108 | __ JumpIfNotSmi(overwritable_operand, &skip_allocation); |
| 3109 | // Allocate a heap number for the result. |
| 3110 | __ AllocateHeapNumber( |
| 3111 | result, scratch1, scratch2, heap_number_map, gc_required); |
| 3112 | __ Branch(&allocated); |
| 3113 | __ bind(&skip_allocation); |
| 3114 | // Use object holding the overwritable operand for result. |
| 3115 | __ mov(result, overwritable_operand); |
| 3116 | __ bind(&allocated); |
| 3117 | } else { |
| 3118 | ASSERT(mode_ == NO_OVERWRITE); |
| 3119 | __ AllocateHeapNumber( |
| 3120 | result, scratch1, scratch2, heap_number_map, gc_required); |
| 3121 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3122 | } |
| 3123 | |
| 3124 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3125 | void BinaryOpStub::GenerateRegisterArgsPush(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3126 | __ Push(a1, a0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3127 | } |
| 3128 | |
| 3129 | |
| 3130 | |
| 3131 | void TranscendentalCacheStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3132 | // Untagged case: double input in f4, double result goes |
| 3133 | // into f4. |
| 3134 | // Tagged case: tagged input on top of stack and in a0, |
| 3135 | // tagged result (heap number) goes into v0. |
| 3136 | |
| 3137 | Label input_not_smi; |
| 3138 | Label loaded; |
| 3139 | Label calculate; |
| 3140 | Label invalid_cache; |
| 3141 | const Register scratch0 = t5; |
| 3142 | const Register scratch1 = t3; |
| 3143 | const Register cache_entry = a0; |
| 3144 | const bool tagged = (argument_type_ == TAGGED); |
| 3145 | |
| 3146 | if (CpuFeatures::IsSupported(FPU)) { |
| 3147 | CpuFeatures::Scope scope(FPU); |
| 3148 | |
| 3149 | if (tagged) { |
| 3150 | // Argument is a number and is on stack and in a0. |
| 3151 | // Load argument and check if it is a smi. |
| 3152 | __ JumpIfNotSmi(a0, &input_not_smi); |
| 3153 | |
| 3154 | // Input is a smi. Convert to double and load the low and high words |
| 3155 | // of the double into a2, a3. |
| 3156 | __ sra(t0, a0, kSmiTagSize); |
| 3157 | __ mtc1(t0, f4); |
| 3158 | __ cvt_d_w(f4, f4); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3159 | __ Move(a2, a3, f4); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3160 | __ Branch(&loaded); |
| 3161 | |
| 3162 | __ bind(&input_not_smi); |
| 3163 | // Check if input is a HeapNumber. |
| 3164 | __ CheckMap(a0, |
| 3165 | a1, |
| 3166 | Heap::kHeapNumberMapRootIndex, |
| 3167 | &calculate, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3168 | DONT_DO_SMI_CHECK); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3169 | // Input is a HeapNumber. Store the |
| 3170 | // low and high words into a2, a3. |
| 3171 | __ lw(a2, FieldMemOperand(a0, HeapNumber::kValueOffset)); |
| 3172 | __ lw(a3, FieldMemOperand(a0, HeapNumber::kValueOffset + 4)); |
| 3173 | } else { |
| 3174 | // Input is untagged double in f4. Output goes to f4. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3175 | __ Move(a2, a3, f4); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3176 | } |
| 3177 | __ bind(&loaded); |
| 3178 | // a2 = low 32 bits of double value. |
| 3179 | // a3 = high 32 bits of double value. |
| 3180 | // Compute hash (the shifts are arithmetic): |
| 3181 | // h = (low ^ high); h ^= h >> 16; h ^= h >> 8; h = h & (cacheSize - 1); |
| 3182 | __ Xor(a1, a2, a3); |
| 3183 | __ sra(t0, a1, 16); |
| 3184 | __ Xor(a1, a1, t0); |
| 3185 | __ sra(t0, a1, 8); |
| 3186 | __ Xor(a1, a1, t0); |
| 3187 | ASSERT(IsPowerOf2(TranscendentalCache::SubCache::kCacheSize)); |
| 3188 | __ And(a1, a1, Operand(TranscendentalCache::SubCache::kCacheSize - 1)); |
| 3189 | |
| 3190 | // a2 = low 32 bits of double value. |
| 3191 | // a3 = high 32 bits of double value. |
| 3192 | // a1 = TranscendentalCache::hash(double value). |
| 3193 | __ li(cache_entry, Operand( |
| 3194 | ExternalReference::transcendental_cache_array_address( |
| 3195 | masm->isolate()))); |
| 3196 | // a0 points to cache array. |
| 3197 | __ lw(cache_entry, MemOperand(cache_entry, type_ * sizeof( |
| 3198 | Isolate::Current()->transcendental_cache()->caches_[0]))); |
| 3199 | // a0 points to the cache for the type type_. |
| 3200 | // If NULL, the cache hasn't been initialized yet, so go through runtime. |
| 3201 | __ Branch(&invalid_cache, eq, cache_entry, Operand(zero_reg)); |
| 3202 | |
| 3203 | #ifdef DEBUG |
| 3204 | // Check that the layout of cache elements match expectations. |
| 3205 | { TranscendentalCache::SubCache::Element test_elem[2]; |
| 3206 | char* elem_start = reinterpret_cast<char*>(&test_elem[0]); |
| 3207 | char* elem2_start = reinterpret_cast<char*>(&test_elem[1]); |
| 3208 | char* elem_in0 = reinterpret_cast<char*>(&(test_elem[0].in[0])); |
| 3209 | char* elem_in1 = reinterpret_cast<char*>(&(test_elem[0].in[1])); |
| 3210 | char* elem_out = reinterpret_cast<char*>(&(test_elem[0].output)); |
| 3211 | CHECK_EQ(12, elem2_start - elem_start); // Two uint_32's and a pointer. |
| 3212 | CHECK_EQ(0, elem_in0 - elem_start); |
| 3213 | CHECK_EQ(kIntSize, elem_in1 - elem_start); |
| 3214 | CHECK_EQ(2 * kIntSize, elem_out - elem_start); |
| 3215 | } |
| 3216 | #endif |
| 3217 | |
| 3218 | // Find the address of the a1'st entry in the cache, i.e., &a0[a1*12]. |
| 3219 | __ sll(t0, a1, 1); |
| 3220 | __ Addu(a1, a1, t0); |
| 3221 | __ sll(t0, a1, 2); |
| 3222 | __ Addu(cache_entry, cache_entry, t0); |
| 3223 | |
| 3224 | // Check if cache matches: Double value is stored in uint32_t[2] array. |
| 3225 | __ lw(t0, MemOperand(cache_entry, 0)); |
| 3226 | __ lw(t1, MemOperand(cache_entry, 4)); |
| 3227 | __ lw(t2, MemOperand(cache_entry, 8)); |
| 3228 | __ Addu(cache_entry, cache_entry, 12); |
| 3229 | __ Branch(&calculate, ne, a2, Operand(t0)); |
| 3230 | __ Branch(&calculate, ne, a3, Operand(t1)); |
| 3231 | // Cache hit. Load result, cleanup and return. |
| 3232 | if (tagged) { |
| 3233 | // Pop input value from stack and load result into v0. |
| 3234 | __ Drop(1); |
| 3235 | __ mov(v0, t2); |
| 3236 | } else { |
| 3237 | // Load result into f4. |
| 3238 | __ ldc1(f4, FieldMemOperand(t2, HeapNumber::kValueOffset)); |
| 3239 | } |
| 3240 | __ Ret(); |
| 3241 | } // if (CpuFeatures::IsSupported(FPU)) |
| 3242 | |
| 3243 | __ bind(&calculate); |
| 3244 | if (tagged) { |
| 3245 | __ bind(&invalid_cache); |
| 3246 | __ TailCallExternalReference(ExternalReference(RuntimeFunction(), |
| 3247 | masm->isolate()), |
| 3248 | 1, |
| 3249 | 1); |
| 3250 | } else { |
| 3251 | if (!CpuFeatures::IsSupported(FPU)) UNREACHABLE(); |
| 3252 | CpuFeatures::Scope scope(FPU); |
| 3253 | |
| 3254 | Label no_update; |
| 3255 | Label skip_cache; |
| 3256 | const Register heap_number_map = t2; |
| 3257 | |
| 3258 | // Call C function to calculate the result and update the cache. |
| 3259 | // Register a0 holds precalculated cache entry address; preserve |
| 3260 | // it on the stack and pop it into register cache_entry after the |
| 3261 | // call. |
| 3262 | __ push(cache_entry); |
| 3263 | GenerateCallCFunction(masm, scratch0); |
| 3264 | __ GetCFunctionDoubleResult(f4); |
| 3265 | |
| 3266 | // Try to update the cache. If we cannot allocate a |
| 3267 | // heap number, we return the result without updating. |
| 3268 | __ pop(cache_entry); |
| 3269 | __ LoadRoot(t1, Heap::kHeapNumberMapRootIndex); |
| 3270 | __ AllocateHeapNumber(t2, scratch0, scratch1, t1, &no_update); |
| 3271 | __ sdc1(f4, FieldMemOperand(t2, HeapNumber::kValueOffset)); |
| 3272 | |
| 3273 | __ sw(a2, MemOperand(cache_entry, 0 * kPointerSize)); |
| 3274 | __ sw(a3, MemOperand(cache_entry, 1 * kPointerSize)); |
| 3275 | __ sw(t2, MemOperand(cache_entry, 2 * kPointerSize)); |
| 3276 | |
| 3277 | __ mov(v0, cache_entry); |
| 3278 | __ Ret(); |
| 3279 | |
| 3280 | __ bind(&invalid_cache); |
| 3281 | // The cache is invalid. Call runtime which will recreate the |
| 3282 | // cache. |
| 3283 | __ LoadRoot(t1, Heap::kHeapNumberMapRootIndex); |
| 3284 | __ AllocateHeapNumber(a0, scratch0, scratch1, t1, &skip_cache); |
| 3285 | __ sdc1(f4, FieldMemOperand(a0, HeapNumber::kValueOffset)); |
| 3286 | __ EnterInternalFrame(); |
| 3287 | __ push(a0); |
| 3288 | __ CallRuntime(RuntimeFunction(), 1); |
| 3289 | __ LeaveInternalFrame(); |
| 3290 | __ ldc1(f4, FieldMemOperand(v0, HeapNumber::kValueOffset)); |
| 3291 | __ Ret(); |
| 3292 | |
| 3293 | __ bind(&skip_cache); |
| 3294 | // Call C function to calculate the result and answer directly |
| 3295 | // without updating the cache. |
| 3296 | GenerateCallCFunction(masm, scratch0); |
| 3297 | __ GetCFunctionDoubleResult(f4); |
| 3298 | __ bind(&no_update); |
| 3299 | |
| 3300 | // We return the value in f4 without adding it to the cache, but |
| 3301 | // we cause a scavenging GC so that future allocations will succeed. |
| 3302 | __ EnterInternalFrame(); |
| 3303 | |
| 3304 | // Allocate an aligned object larger than a HeapNumber. |
| 3305 | ASSERT(4 * kPointerSize >= HeapNumber::kSize); |
| 3306 | __ li(scratch0, Operand(4 * kPointerSize)); |
| 3307 | __ push(scratch0); |
| 3308 | __ CallRuntimeSaveDoubles(Runtime::kAllocateInNewSpace); |
| 3309 | __ LeaveInternalFrame(); |
| 3310 | __ Ret(); |
| 3311 | } |
| 3312 | } |
| 3313 | |
| 3314 | |
| 3315 | void TranscendentalCacheStub::GenerateCallCFunction(MacroAssembler* masm, |
| 3316 | Register scratch) { |
| 3317 | __ push(ra); |
| 3318 | __ PrepareCallCFunction(2, scratch); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3319 | if (IsMipsSoftFloatABI) { |
| 3320 | __ Move(v0, v1, f4); |
| 3321 | } else { |
| 3322 | __ mov_d(f12, f4); |
| 3323 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3324 | switch (type_) { |
| 3325 | case TranscendentalCache::SIN: |
| 3326 | __ CallCFunction( |
| 3327 | ExternalReference::math_sin_double_function(masm->isolate()), 2); |
| 3328 | break; |
| 3329 | case TranscendentalCache::COS: |
| 3330 | __ CallCFunction( |
| 3331 | ExternalReference::math_cos_double_function(masm->isolate()), 2); |
| 3332 | break; |
| 3333 | case TranscendentalCache::LOG: |
| 3334 | __ CallCFunction( |
| 3335 | ExternalReference::math_log_double_function(masm->isolate()), 2); |
| 3336 | break; |
| 3337 | default: |
| 3338 | UNIMPLEMENTED(); |
| 3339 | break; |
| 3340 | } |
| 3341 | __ pop(ra); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3342 | } |
| 3343 | |
| 3344 | |
| 3345 | Runtime::FunctionId TranscendentalCacheStub::RuntimeFunction() { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3346 | switch (type_) { |
| 3347 | // Add more cases when necessary. |
| 3348 | case TranscendentalCache::SIN: return Runtime::kMath_sin; |
| 3349 | case TranscendentalCache::COS: return Runtime::kMath_cos; |
| 3350 | case TranscendentalCache::LOG: return Runtime::kMath_log; |
| 3351 | default: |
| 3352 | UNIMPLEMENTED(); |
| 3353 | return Runtime::kAbort; |
| 3354 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3355 | } |
| 3356 | |
| 3357 | |
| 3358 | void StackCheckStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3359 | __ TailCallRuntime(Runtime::kStackGuard, 0, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3360 | } |
| 3361 | |
| 3362 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3363 | void MathPowStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3364 | Label call_runtime; |
| 3365 | |
| 3366 | if (CpuFeatures::IsSupported(FPU)) { |
| 3367 | CpuFeatures::Scope scope(FPU); |
| 3368 | |
| 3369 | Label base_not_smi; |
| 3370 | Label exponent_not_smi; |
| 3371 | Label convert_exponent; |
| 3372 | |
| 3373 | const Register base = a0; |
| 3374 | const Register exponent = a2; |
| 3375 | const Register heapnumbermap = t1; |
| 3376 | const Register heapnumber = s0; // Callee-saved register. |
| 3377 | const Register scratch = t2; |
| 3378 | const Register scratch2 = t3; |
| 3379 | |
| 3380 | // Alocate FP values in the ABI-parameter-passing regs. |
| 3381 | const DoubleRegister double_base = f12; |
| 3382 | const DoubleRegister double_exponent = f14; |
| 3383 | const DoubleRegister double_result = f0; |
| 3384 | const DoubleRegister double_scratch = f2; |
| 3385 | |
| 3386 | __ LoadRoot(heapnumbermap, Heap::kHeapNumberMapRootIndex); |
| 3387 | __ lw(base, MemOperand(sp, 1 * kPointerSize)); |
| 3388 | __ lw(exponent, MemOperand(sp, 0 * kPointerSize)); |
| 3389 | |
| 3390 | // Convert base to double value and store it in f0. |
| 3391 | __ JumpIfNotSmi(base, &base_not_smi); |
| 3392 | // Base is a Smi. Untag and convert it. |
| 3393 | __ SmiUntag(base); |
| 3394 | __ mtc1(base, double_scratch); |
| 3395 | __ cvt_d_w(double_base, double_scratch); |
| 3396 | __ Branch(&convert_exponent); |
| 3397 | |
| 3398 | __ bind(&base_not_smi); |
| 3399 | __ lw(scratch, FieldMemOperand(base, JSObject::kMapOffset)); |
| 3400 | __ Branch(&call_runtime, ne, scratch, Operand(heapnumbermap)); |
| 3401 | // Base is a heapnumber. Load it into double register. |
| 3402 | __ ldc1(double_base, FieldMemOperand(base, HeapNumber::kValueOffset)); |
| 3403 | |
| 3404 | __ bind(&convert_exponent); |
| 3405 | __ JumpIfNotSmi(exponent, &exponent_not_smi); |
| 3406 | __ SmiUntag(exponent); |
| 3407 | |
| 3408 | // The base is in a double register and the exponent is |
| 3409 | // an untagged smi. Allocate a heap number and call a |
| 3410 | // C function for integer exponents. The register containing |
| 3411 | // the heap number is callee-saved. |
| 3412 | __ AllocateHeapNumber(heapnumber, |
| 3413 | scratch, |
| 3414 | scratch2, |
| 3415 | heapnumbermap, |
| 3416 | &call_runtime); |
| 3417 | __ push(ra); |
| 3418 | __ PrepareCallCFunction(3, scratch); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3419 | __ SetCallCDoubleArguments(double_base, exponent); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3420 | __ CallCFunction( |
| 3421 | ExternalReference::power_double_int_function(masm->isolate()), 3); |
| 3422 | __ pop(ra); |
| 3423 | __ GetCFunctionDoubleResult(double_result); |
| 3424 | __ sdc1(double_result, |
| 3425 | FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
| 3426 | __ mov(v0, heapnumber); |
| 3427 | __ DropAndRet(2 * kPointerSize); |
| 3428 | |
| 3429 | __ bind(&exponent_not_smi); |
| 3430 | __ lw(scratch, FieldMemOperand(exponent, JSObject::kMapOffset)); |
| 3431 | __ Branch(&call_runtime, ne, scratch, Operand(heapnumbermap)); |
| 3432 | // Exponent is a heapnumber. Load it into double register. |
| 3433 | __ ldc1(double_exponent, |
| 3434 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
| 3435 | |
| 3436 | // The base and the exponent are in double registers. |
| 3437 | // Allocate a heap number and call a C function for |
| 3438 | // double exponents. The register containing |
| 3439 | // the heap number is callee-saved. |
| 3440 | __ AllocateHeapNumber(heapnumber, |
| 3441 | scratch, |
| 3442 | scratch2, |
| 3443 | heapnumbermap, |
| 3444 | &call_runtime); |
| 3445 | __ push(ra); |
| 3446 | __ PrepareCallCFunction(4, scratch); |
| 3447 | // ABI (o32) for func(double a, double b): a in f12, b in f14. |
| 3448 | ASSERT(double_base.is(f12)); |
| 3449 | ASSERT(double_exponent.is(f14)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3450 | __ SetCallCDoubleArguments(double_base, double_exponent); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3451 | __ CallCFunction( |
| 3452 | ExternalReference::power_double_double_function(masm->isolate()), 4); |
| 3453 | __ pop(ra); |
| 3454 | __ GetCFunctionDoubleResult(double_result); |
| 3455 | __ sdc1(double_result, |
| 3456 | FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
| 3457 | __ mov(v0, heapnumber); |
| 3458 | __ DropAndRet(2 * kPointerSize); |
| 3459 | } |
| 3460 | |
| 3461 | __ bind(&call_runtime); |
| 3462 | __ TailCallRuntime(Runtime::kMath_pow_cfunction, 2, 1); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 3463 | } |
| 3464 | |
| 3465 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3466 | bool CEntryStub::NeedsImmovableCode() { |
| 3467 | return true; |
| 3468 | } |
| 3469 | |
| 3470 | |
| 3471 | void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3472 | __ Throw(v0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3473 | } |
| 3474 | |
| 3475 | |
| 3476 | void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm, |
| 3477 | UncatchableExceptionType type) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3478 | __ ThrowUncatchable(type, v0); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3479 | } |
| 3480 | |
| 3481 | |
| 3482 | void CEntryStub::GenerateCore(MacroAssembler* masm, |
| 3483 | Label* throw_normal_exception, |
| 3484 | Label* throw_termination_exception, |
| 3485 | Label* throw_out_of_memory_exception, |
| 3486 | bool do_gc, |
| 3487 | bool always_allocate) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3488 | // v0: result parameter for PerformGC, if any |
| 3489 | // s0: number of arguments including receiver (C callee-saved) |
| 3490 | // s1: pointer to the first argument (C callee-saved) |
| 3491 | // s2: pointer to builtin function (C callee-saved) |
| 3492 | |
| 3493 | if (do_gc) { |
| 3494 | // Move result passed in v0 into a0 to call PerformGC. |
| 3495 | __ mov(a0, v0); |
| 3496 | __ PrepareCallCFunction(1, a1); |
| 3497 | __ CallCFunction( |
| 3498 | ExternalReference::perform_gc_function(masm->isolate()), 1); |
| 3499 | } |
| 3500 | |
| 3501 | ExternalReference scope_depth = |
| 3502 | ExternalReference::heap_always_allocate_scope_depth(masm->isolate()); |
| 3503 | if (always_allocate) { |
| 3504 | __ li(a0, Operand(scope_depth)); |
| 3505 | __ lw(a1, MemOperand(a0)); |
| 3506 | __ Addu(a1, a1, Operand(1)); |
| 3507 | __ sw(a1, MemOperand(a0)); |
| 3508 | } |
| 3509 | |
| 3510 | // Prepare arguments for C routine: a0 = argc, a1 = argv |
| 3511 | __ mov(a0, s0); |
| 3512 | __ mov(a1, s1); |
| 3513 | |
| 3514 | // We are calling compiled C/C++ code. a0 and a1 hold our two arguments. We |
| 3515 | // also need to reserve the 4 argument slots on the stack. |
| 3516 | |
| 3517 | __ AssertStackIsAligned(); |
| 3518 | |
| 3519 | __ li(a2, Operand(ExternalReference::isolate_address())); |
| 3520 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 3521 | // To let the GC traverse the return address of the exit frames, we need to |
| 3522 | // know where the return address is. The CEntryStub is unmovable, so |
| 3523 | // we can store the address on the stack to be able to find it again and |
| 3524 | // we never have to restore it, because it will not change. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3525 | { Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm); |
| 3526 | // This branch-and-link sequence is needed to find the current PC on mips, |
| 3527 | // saved to the ra register. |
| 3528 | // Use masm-> here instead of the double-underscore macro since extra |
| 3529 | // coverage code can interfere with the proper calculation of ra. |
| 3530 | Label find_ra; |
| 3531 | masm->bal(&find_ra); // bal exposes branch delay slot. |
| 3532 | masm->nop(); // Branch delay slot nop. |
| 3533 | masm->bind(&find_ra); |
| 3534 | |
| 3535 | // Adjust the value in ra to point to the correct return location, 2nd |
| 3536 | // instruction past the real call into C code (the jalr(t9)), and push it. |
| 3537 | // This is the return address of the exit frame. |
| 3538 | const int kNumInstructionsToJump = 6; |
| 3539 | masm->Addu(ra, ra, kNumInstructionsToJump * kPointerSize); |
| 3540 | masm->sw(ra, MemOperand(sp)); // This spot was reserved in EnterExitFrame. |
| 3541 | masm->Subu(sp, sp, StandardFrameConstants::kCArgsSlotsSize); |
| 3542 | // Stack is still aligned. |
| 3543 | |
| 3544 | // Call the C routine. |
| 3545 | masm->mov(t9, s2); // Function pointer to t9 to conform to ABI for PIC. |
| 3546 | masm->jalr(t9); |
| 3547 | masm->nop(); // Branch delay slot nop. |
| 3548 | // Make sure the stored 'ra' points to this position. |
| 3549 | ASSERT_EQ(kNumInstructionsToJump, |
| 3550 | masm->InstructionsGeneratedSince(&find_ra)); |
| 3551 | } |
| 3552 | |
| 3553 | // Restore stack (remove arg slots). |
| 3554 | __ Addu(sp, sp, StandardFrameConstants::kCArgsSlotsSize); |
| 3555 | |
| 3556 | if (always_allocate) { |
| 3557 | // It's okay to clobber a2 and a3 here. v0 & v1 contain result. |
| 3558 | __ li(a2, Operand(scope_depth)); |
| 3559 | __ lw(a3, MemOperand(a2)); |
| 3560 | __ Subu(a3, a3, Operand(1)); |
| 3561 | __ sw(a3, MemOperand(a2)); |
| 3562 | } |
| 3563 | |
| 3564 | // Check for failure result. |
| 3565 | Label failure_returned; |
| 3566 | STATIC_ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
| 3567 | __ addiu(a2, v0, 1); |
| 3568 | __ andi(t0, a2, kFailureTagMask); |
| 3569 | __ Branch(&failure_returned, eq, t0, Operand(zero_reg)); |
| 3570 | |
| 3571 | // Exit C frame and return. |
| 3572 | // v0:v1: result |
| 3573 | // sp: stack pointer |
| 3574 | // fp: frame pointer |
| 3575 | __ LeaveExitFrame(save_doubles_, s0); |
| 3576 | __ Ret(); |
| 3577 | |
| 3578 | // Check if we should retry or throw exception. |
| 3579 | Label retry; |
| 3580 | __ bind(&failure_returned); |
| 3581 | STATIC_ASSERT(Failure::RETRY_AFTER_GC == 0); |
| 3582 | __ andi(t0, v0, ((1 << kFailureTypeTagSize) - 1) << kFailureTagSize); |
| 3583 | __ Branch(&retry, eq, t0, Operand(zero_reg)); |
| 3584 | |
| 3585 | // Special handling of out of memory exceptions. |
| 3586 | Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 3587 | __ Branch(throw_out_of_memory_exception, eq, |
| 3588 | v0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 3589 | |
| 3590 | // Retrieve the pending exception and clear the variable. |
| 3591 | __ li(t0, |
| 3592 | Operand(ExternalReference::the_hole_value_location(masm->isolate()))); |
| 3593 | __ lw(a3, MemOperand(t0)); |
| 3594 | __ li(t0, Operand(ExternalReference(Isolate::k_pending_exception_address, |
| 3595 | masm->isolate()))); |
| 3596 | __ lw(v0, MemOperand(t0)); |
| 3597 | __ sw(a3, MemOperand(t0)); |
| 3598 | |
| 3599 | // Special handling of termination exceptions which are uncatchable |
| 3600 | // by javascript code. |
| 3601 | __ Branch(throw_termination_exception, eq, |
| 3602 | v0, Operand(masm->isolate()->factory()->termination_exception())); |
| 3603 | |
| 3604 | // Handle normal exception. |
| 3605 | __ jmp(throw_normal_exception); |
| 3606 | |
| 3607 | __ bind(&retry); |
| 3608 | // Last failure (v0) will be moved to (a0) for parameter when retrying. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3609 | } |
| 3610 | |
| 3611 | |
| 3612 | void CEntryStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3613 | // Called from JavaScript; parameters are on stack as if calling JS function |
| 3614 | // a0: number of arguments including receiver |
| 3615 | // a1: pointer to builtin function |
| 3616 | // fp: frame pointer (restored after C call) |
| 3617 | // sp: stack pointer (restored as callee's sp after C call) |
| 3618 | // cp: current context (C callee-saved) |
| 3619 | |
| 3620 | // NOTE: Invocations of builtins may return failure objects |
| 3621 | // instead of a proper result. The builtin entry handles |
| 3622 | // this by performing a garbage collection and retrying the |
| 3623 | // builtin once. |
| 3624 | |
| 3625 | // Compute the argv pointer in a callee-saved register. |
| 3626 | __ sll(s1, a0, kPointerSizeLog2); |
| 3627 | __ Addu(s1, sp, s1); |
| 3628 | __ Subu(s1, s1, Operand(kPointerSize)); |
| 3629 | |
| 3630 | // Enter the exit frame that transitions from JavaScript to C++. |
| 3631 | __ EnterExitFrame(save_doubles_); |
| 3632 | |
| 3633 | // Setup argc and the builtin function in callee-saved registers. |
| 3634 | __ mov(s0, a0); |
| 3635 | __ mov(s2, a1); |
| 3636 | |
| 3637 | // s0: number of arguments (C callee-saved) |
| 3638 | // s1: pointer to first argument (C callee-saved) |
| 3639 | // s2: pointer to builtin function (C callee-saved) |
| 3640 | |
| 3641 | Label throw_normal_exception; |
| 3642 | Label throw_termination_exception; |
| 3643 | Label throw_out_of_memory_exception; |
| 3644 | |
| 3645 | // Call into the runtime system. |
| 3646 | GenerateCore(masm, |
| 3647 | &throw_normal_exception, |
| 3648 | &throw_termination_exception, |
| 3649 | &throw_out_of_memory_exception, |
| 3650 | false, |
| 3651 | false); |
| 3652 | |
| 3653 | // Do space-specific GC and retry runtime call. |
| 3654 | GenerateCore(masm, |
| 3655 | &throw_normal_exception, |
| 3656 | &throw_termination_exception, |
| 3657 | &throw_out_of_memory_exception, |
| 3658 | true, |
| 3659 | false); |
| 3660 | |
| 3661 | // Do full GC and retry runtime call one final time. |
| 3662 | Failure* failure = Failure::InternalError(); |
| 3663 | __ li(v0, Operand(reinterpret_cast<int32_t>(failure))); |
| 3664 | GenerateCore(masm, |
| 3665 | &throw_normal_exception, |
| 3666 | &throw_termination_exception, |
| 3667 | &throw_out_of_memory_exception, |
| 3668 | true, |
| 3669 | true); |
| 3670 | |
| 3671 | __ bind(&throw_out_of_memory_exception); |
| 3672 | GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
| 3673 | |
| 3674 | __ bind(&throw_termination_exception); |
| 3675 | GenerateThrowUncatchable(masm, TERMINATION); |
| 3676 | |
| 3677 | __ bind(&throw_normal_exception); |
| 3678 | GenerateThrowTOS(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3679 | } |
| 3680 | |
| 3681 | |
| 3682 | void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3683 | Label invoke, exit; |
| 3684 | |
| 3685 | // Registers: |
| 3686 | // a0: entry address |
| 3687 | // a1: function |
| 3688 | // a2: reveiver |
| 3689 | // a3: argc |
| 3690 | // |
| 3691 | // Stack: |
| 3692 | // 4 args slots |
| 3693 | // args |
| 3694 | |
| 3695 | // Save callee saved registers on the stack. |
| 3696 | __ MultiPush((kCalleeSaved | ra.bit()) & ~sp.bit()); |
| 3697 | |
| 3698 | // Load argv in s0 register. |
| 3699 | __ lw(s0, MemOperand(sp, kNumCalleeSaved * kPointerSize + |
| 3700 | StandardFrameConstants::kCArgsSlotsSize)); |
| 3701 | |
| 3702 | // We build an EntryFrame. |
| 3703 | __ li(t3, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
| 3704 | int marker = is_construct ? StackFrame::ENTRY_CONSTRUCT : StackFrame::ENTRY; |
| 3705 | __ li(t2, Operand(Smi::FromInt(marker))); |
| 3706 | __ li(t1, Operand(Smi::FromInt(marker))); |
| 3707 | __ li(t0, Operand(ExternalReference(Isolate::k_c_entry_fp_address, |
| 3708 | masm->isolate()))); |
| 3709 | __ lw(t0, MemOperand(t0)); |
| 3710 | __ Push(t3, t2, t1, t0); |
| 3711 | // Setup frame pointer for the frame to be pushed. |
| 3712 | __ addiu(fp, sp, -EntryFrameConstants::kCallerFPOffset); |
| 3713 | |
| 3714 | // Registers: |
| 3715 | // a0: entry_address |
| 3716 | // a1: function |
| 3717 | // a2: reveiver_pointer |
| 3718 | // a3: argc |
| 3719 | // s0: argv |
| 3720 | // |
| 3721 | // Stack: |
| 3722 | // caller fp | |
| 3723 | // function slot | entry frame |
| 3724 | // context slot | |
| 3725 | // bad fp (0xff...f) | |
| 3726 | // callee saved registers + ra |
| 3727 | // 4 args slots |
| 3728 | // args |
| 3729 | |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 3730 | // If this is the outermost JS call, set js_entry_sp value. |
| 3731 | Label non_outermost_js; |
| 3732 | ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, |
| 3733 | masm->isolate()); |
| 3734 | __ li(t1, Operand(ExternalReference(js_entry_sp))); |
| 3735 | __ lw(t2, MemOperand(t1)); |
| 3736 | __ Branch(&non_outermost_js, ne, t2, Operand(zero_reg)); |
| 3737 | __ sw(fp, MemOperand(t1)); |
| 3738 | __ li(t0, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 3739 | Label cont; |
| 3740 | __ b(&cont); |
| 3741 | __ nop(); // Branch delay slot nop. |
| 3742 | __ bind(&non_outermost_js); |
| 3743 | __ li(t0, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
| 3744 | __ bind(&cont); |
| 3745 | __ push(t0); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3746 | |
| 3747 | // Call a faked try-block that does the invoke. |
| 3748 | __ bal(&invoke); // bal exposes branch delay slot. |
| 3749 | __ nop(); // Branch delay slot nop. |
| 3750 | |
| 3751 | // Caught exception: Store result (exception) in the pending |
| 3752 | // exception field in the JSEnv and return a failure sentinel. |
| 3753 | // Coming in here the fp will be invalid because the PushTryHandler below |
| 3754 | // sets it to 0 to signal the existence of the JSEntry frame. |
| 3755 | __ li(t0, Operand(ExternalReference(Isolate::k_pending_exception_address, |
| 3756 | masm->isolate()))); |
| 3757 | __ sw(v0, MemOperand(t0)); // We come back from 'invoke'. result is in v0. |
| 3758 | __ li(v0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); |
| 3759 | __ b(&exit); // b exposes branch delay slot. |
| 3760 | __ nop(); // Branch delay slot nop. |
| 3761 | |
| 3762 | // Invoke: Link this frame into the handler chain. |
| 3763 | __ bind(&invoke); |
| 3764 | __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 3765 | // If an exception not caught by another handler occurs, this handler |
| 3766 | // returns control to the code after the bal(&invoke) above, which |
| 3767 | // restores all kCalleeSaved registers (including cp and fp) to their |
| 3768 | // saved values before returning a failure to C. |
| 3769 | |
| 3770 | // Clear any pending exceptions. |
| 3771 | __ li(t0, |
| 3772 | Operand(ExternalReference::the_hole_value_location(masm->isolate()))); |
| 3773 | __ lw(t1, MemOperand(t0)); |
| 3774 | __ li(t0, Operand(ExternalReference(Isolate::k_pending_exception_address, |
| 3775 | masm->isolate()))); |
| 3776 | __ sw(t1, MemOperand(t0)); |
| 3777 | |
| 3778 | // Invoke the function by calling through JS entry trampoline builtin. |
| 3779 | // Notice that we cannot store a reference to the trampoline code directly in |
| 3780 | // this stub, because runtime stubs are not traversed when doing GC. |
| 3781 | |
| 3782 | // Registers: |
| 3783 | // a0: entry_address |
| 3784 | // a1: function |
| 3785 | // a2: reveiver_pointer |
| 3786 | // a3: argc |
| 3787 | // s0: argv |
| 3788 | // |
| 3789 | // Stack: |
| 3790 | // handler frame |
| 3791 | // entry frame |
| 3792 | // callee saved registers + ra |
| 3793 | // 4 args slots |
| 3794 | // args |
| 3795 | |
| 3796 | if (is_construct) { |
| 3797 | ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
| 3798 | masm->isolate()); |
| 3799 | __ li(t0, Operand(construct_entry)); |
| 3800 | } else { |
| 3801 | ExternalReference entry(Builtins::kJSEntryTrampoline, masm->isolate()); |
| 3802 | __ li(t0, Operand(entry)); |
| 3803 | } |
| 3804 | __ lw(t9, MemOperand(t0)); // Deref address. |
| 3805 | |
| 3806 | // Call JSEntryTrampoline. |
| 3807 | __ addiu(t9, t9, Code::kHeaderSize - kHeapObjectTag); |
| 3808 | __ Call(t9); |
| 3809 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3810 | // Unlink this frame from the handler chain. |
| 3811 | __ PopTryHandler(); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3812 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3813 | __ bind(&exit); // v0 holds result |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 3814 | // Check if the current stack frame is marked as the outermost JS frame. |
| 3815 | Label non_outermost_js_2; |
| 3816 | __ pop(t1); |
| 3817 | __ Branch(&non_outermost_js_2, ne, t1, |
| 3818 | Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 3819 | __ li(t1, Operand(ExternalReference(js_entry_sp))); |
| 3820 | __ sw(zero_reg, MemOperand(t1)); |
| 3821 | __ bind(&non_outermost_js_2); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3822 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3823 | // Restore the top frame descriptors from the stack. |
| 3824 | __ pop(t1); |
| 3825 | __ li(t0, Operand(ExternalReference(Isolate::k_c_entry_fp_address, |
| 3826 | masm->isolate()))); |
| 3827 | __ sw(t1, MemOperand(t0)); |
| 3828 | |
| 3829 | // Reset the stack to the callee saved registers. |
| 3830 | __ addiu(sp, sp, -EntryFrameConstants::kCallerFPOffset); |
| 3831 | |
| 3832 | // Restore callee saved registers from the stack. |
| 3833 | __ MultiPop((kCalleeSaved | ra.bit()) & ~sp.bit()); |
| 3834 | // Return. |
| 3835 | __ Jump(ra); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3836 | } |
| 3837 | |
| 3838 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3839 | // Uses registers a0 to t0. |
| 3840 | // Expected input (depending on whether args are in registers or on the stack): |
| 3841 | // * object: a0 or at sp + 1 * kPointerSize. |
| 3842 | // * function: a1 or at sp. |
| 3843 | // |
| 3844 | // Inlined call site patching is a crankshaft-specific feature that is not |
| 3845 | // implemented on MIPS. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3846 | void InstanceofStub::Generate(MacroAssembler* masm) { |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3847 | // This is a crankshaft-specific feature that has not been implemented yet. |
| 3848 | ASSERT(!HasCallSiteInlineCheck()); |
| 3849 | // Call site inlining and patching implies arguments in registers. |
| 3850 | ASSERT(HasArgsInRegisters() || !HasCallSiteInlineCheck()); |
| 3851 | // ReturnTrueFalse is only implemented for inlined call sites. |
| 3852 | ASSERT(!ReturnTrueFalseObject() || HasCallSiteInlineCheck()); |
| 3853 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3854 | // Fixed register usage throughout the stub: |
| 3855 | const Register object = a0; // Object (lhs). |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3856 | Register map = a3; // Map of the object. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3857 | const Register function = a1; // Function (rhs). |
| 3858 | const Register prototype = t0; // Prototype of the function. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3859 | const Register inline_site = t5; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3860 | const Register scratch = a2; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3861 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3862 | Label slow, loop, is_instance, is_not_instance, not_js_object; |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3863 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3864 | if (!HasArgsInRegisters()) { |
| 3865 | __ lw(object, MemOperand(sp, 1 * kPointerSize)); |
| 3866 | __ lw(function, MemOperand(sp, 0)); |
| 3867 | } |
| 3868 | |
| 3869 | // Check that the left hand is a JS object and load map. |
| 3870 | __ JumpIfSmi(object, ¬_js_object); |
| 3871 | __ IsObjectJSObjectType(object, map, scratch, ¬_js_object); |
| 3872 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3873 | // If there is a call site cache don't look in the global cache, but do the |
| 3874 | // real lookup and update the call site cache. |
| 3875 | if (!HasCallSiteInlineCheck()) { |
| 3876 | Label miss; |
| 3877 | __ LoadRoot(t1, Heap::kInstanceofCacheFunctionRootIndex); |
| 3878 | __ Branch(&miss, ne, function, Operand(t1)); |
| 3879 | __ LoadRoot(t1, Heap::kInstanceofCacheMapRootIndex); |
| 3880 | __ Branch(&miss, ne, map, Operand(t1)); |
| 3881 | __ LoadRoot(v0, Heap::kInstanceofCacheAnswerRootIndex); |
| 3882 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3883 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3884 | __ bind(&miss); |
| 3885 | } |
| 3886 | |
| 3887 | // Get the prototype of the function. |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3888 | __ TryGetFunctionPrototype(function, prototype, scratch, &slow); |
| 3889 | |
| 3890 | // Check that the function prototype is a JS object. |
| 3891 | __ JumpIfSmi(prototype, &slow); |
| 3892 | __ IsObjectJSObjectType(prototype, scratch, scratch, &slow); |
| 3893 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3894 | // Update the global instanceof or call site inlined cache with the current |
| 3895 | // map and function. The cached answer will be set when it is known below. |
| 3896 | if (!HasCallSiteInlineCheck()) { |
| 3897 | __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
| 3898 | __ StoreRoot(map, Heap::kInstanceofCacheMapRootIndex); |
| 3899 | } else { |
| 3900 | UNIMPLEMENTED_MIPS(); |
| 3901 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3902 | |
| 3903 | // Register mapping: a3 is object map and t0 is function prototype. |
| 3904 | // Get prototype of object into a2. |
| 3905 | __ lw(scratch, FieldMemOperand(map, Map::kPrototypeOffset)); |
| 3906 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3907 | // We don't need map any more. Use it as a scratch register. |
| 3908 | Register scratch2 = map; |
| 3909 | map = no_reg; |
| 3910 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3911 | // Loop through the prototype chain looking for the function prototype. |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3912 | __ LoadRoot(scratch2, Heap::kNullValueRootIndex); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3913 | __ bind(&loop); |
| 3914 | __ Branch(&is_instance, eq, scratch, Operand(prototype)); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3915 | __ Branch(&is_not_instance, eq, scratch, Operand(scratch2)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3916 | __ lw(scratch, FieldMemOperand(scratch, HeapObject::kMapOffset)); |
| 3917 | __ lw(scratch, FieldMemOperand(scratch, Map::kPrototypeOffset)); |
| 3918 | __ Branch(&loop); |
| 3919 | |
| 3920 | __ bind(&is_instance); |
| 3921 | ASSERT(Smi::FromInt(0) == 0); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3922 | if (!HasCallSiteInlineCheck()) { |
| 3923 | __ mov(v0, zero_reg); |
| 3924 | __ StoreRoot(v0, Heap::kInstanceofCacheAnswerRootIndex); |
| 3925 | } else { |
| 3926 | UNIMPLEMENTED_MIPS(); |
| 3927 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3928 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3929 | |
| 3930 | __ bind(&is_not_instance); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3931 | if (!HasCallSiteInlineCheck()) { |
| 3932 | __ li(v0, Operand(Smi::FromInt(1))); |
| 3933 | __ StoreRoot(v0, Heap::kInstanceofCacheAnswerRootIndex); |
| 3934 | } else { |
| 3935 | UNIMPLEMENTED_MIPS(); |
| 3936 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3937 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3938 | |
| 3939 | Label object_not_null, object_not_null_or_smi; |
| 3940 | __ bind(¬_js_object); |
| 3941 | // Before null, smi and string value checks, check that the rhs is a function |
| 3942 | // as for a non-function rhs an exception needs to be thrown. |
| 3943 | __ JumpIfSmi(function, &slow); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3944 | __ GetObjectType(function, scratch2, scratch); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3945 | __ Branch(&slow, ne, scratch, Operand(JS_FUNCTION_TYPE)); |
| 3946 | |
| 3947 | // Null is not instance of anything. |
| 3948 | __ Branch(&object_not_null, ne, scratch, |
| 3949 | Operand(masm->isolate()->factory()->null_value())); |
| 3950 | __ li(v0, Operand(Smi::FromInt(1))); |
| 3951 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3952 | |
| 3953 | __ bind(&object_not_null); |
| 3954 | // Smi values are not instances of anything. |
| 3955 | __ JumpIfNotSmi(object, &object_not_null_or_smi); |
| 3956 | __ li(v0, Operand(Smi::FromInt(1))); |
| 3957 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3958 | |
| 3959 | __ bind(&object_not_null_or_smi); |
| 3960 | // String values are not instances of anything. |
| 3961 | __ IsObjectJSStringType(object, scratch, &slow); |
| 3962 | __ li(v0, Operand(Smi::FromInt(1))); |
| 3963 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3964 | |
| 3965 | // Slow-case. Tail call builtin. |
| 3966 | __ bind(&slow); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3967 | if (!ReturnTrueFalseObject()) { |
| 3968 | if (HasArgsInRegisters()) { |
| 3969 | __ Push(a0, a1); |
| 3970 | } |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3971 | __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3972 | } else { |
| 3973 | __ EnterInternalFrame(); |
| 3974 | __ Push(a0, a1); |
| 3975 | __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_FUNCTION); |
| 3976 | __ LeaveInternalFrame(); |
| 3977 | __ mov(a0, v0); |
| 3978 | __ LoadRoot(v0, Heap::kTrueValueRootIndex); |
| 3979 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2, eq, a0, Operand(zero_reg)); |
| 3980 | __ LoadRoot(v0, Heap::kFalseValueRootIndex); |
| 3981 | __ DropAndRet(HasArgsInRegisters() ? 0 : 2); |
| 3982 | } |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3983 | } |
| 3984 | |
| 3985 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 3986 | Register InstanceofStub::left() { return a0; } |
| 3987 | |
| 3988 | |
| 3989 | Register InstanceofStub::right() { return a1; } |
| 3990 | |
| 3991 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 3992 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 3993 | // The displacement is the offset of the last parameter (if any) |
| 3994 | // relative to the frame pointer. |
| 3995 | static const int kDisplacement = |
| 3996 | StandardFrameConstants::kCallerSPOffset - kPointerSize; |
| 3997 | |
| 3998 | // Check that the key is a smiGenerateReadElement. |
| 3999 | Label slow; |
| 4000 | __ JumpIfNotSmi(a1, &slow); |
| 4001 | |
| 4002 | // Check if the calling frame is an arguments adaptor frame. |
| 4003 | Label adaptor; |
| 4004 | __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 4005 | __ lw(a3, MemOperand(a2, StandardFrameConstants::kContextOffset)); |
| 4006 | __ Branch(&adaptor, |
| 4007 | eq, |
| 4008 | a3, |
| 4009 | Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4010 | |
| 4011 | // Check index (a1) against formal parameters count limit passed in |
| 4012 | // through register a0. Use unsigned comparison to get negative |
| 4013 | // check for free. |
| 4014 | __ Branch(&slow, hs, a1, Operand(a0)); |
| 4015 | |
| 4016 | // Read the argument from the stack and return it. |
| 4017 | __ subu(a3, a0, a1); |
| 4018 | __ sll(t3, a3, kPointerSizeLog2 - kSmiTagSize); |
| 4019 | __ Addu(a3, fp, Operand(t3)); |
| 4020 | __ lw(v0, MemOperand(a3, kDisplacement)); |
| 4021 | __ Ret(); |
| 4022 | |
| 4023 | // Arguments adaptor case: Check index (a1) against actual arguments |
| 4024 | // limit found in the arguments adaptor frame. Use unsigned |
| 4025 | // comparison to get negative check for free. |
| 4026 | __ bind(&adaptor); |
| 4027 | __ lw(a0, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4028 | __ Branch(&slow, Ugreater_equal, a1, Operand(a0)); |
| 4029 | |
| 4030 | // Read the argument from the adaptor frame and return it. |
| 4031 | __ subu(a3, a0, a1); |
| 4032 | __ sll(t3, a3, kPointerSizeLog2 - kSmiTagSize); |
| 4033 | __ Addu(a3, a2, Operand(t3)); |
| 4034 | __ lw(v0, MemOperand(a3, kDisplacement)); |
| 4035 | __ Ret(); |
| 4036 | |
| 4037 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 4038 | // by calling the runtime system. |
| 4039 | __ bind(&slow); |
| 4040 | __ push(a1); |
| 4041 | __ TailCallRuntime(Runtime::kGetArgumentsProperty, 1, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4042 | } |
| 4043 | |
| 4044 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4045 | void ArgumentsAccessStub::GenerateNewNonStrictSlow(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4046 | // sp[0] : number of parameters |
| 4047 | // sp[4] : receiver displacement |
| 4048 | // sp[8] : function |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4049 | // Check if the calling frame is an arguments adaptor frame. |
| 4050 | Label runtime; |
| 4051 | __ lw(a3, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 4052 | __ lw(a2, MemOperand(a3, StandardFrameConstants::kContextOffset)); |
| 4053 | __ Branch(&runtime, ne, |
| 4054 | a2, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4055 | |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4056 | // Patch the arguments.length and the parameters pointer in the current frame. |
| 4057 | __ lw(a2, MemOperand(a3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4058 | __ sw(a2, MemOperand(sp, 0 * kPointerSize)); |
| 4059 | __ sll(t3, a2, 1); |
| 4060 | __ Addu(a3, a3, Operand(t3)); |
| 4061 | __ addiu(a3, a3, StandardFrameConstants::kCallerSPOffset); |
| 4062 | __ sw(a3, MemOperand(sp, 1 * kPointerSize)); |
| 4063 | |
| 4064 | __ bind(&runtime); |
| 4065 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 4066 | } |
| 4067 | |
| 4068 | |
| 4069 | void ArgumentsAccessStub::GenerateNewNonStrictFast(MacroAssembler* masm) { |
| 4070 | // Stack layout: |
| 4071 | // sp[0] : number of parameters (tagged) |
| 4072 | // sp[4] : address of receiver argument |
| 4073 | // sp[8] : function |
| 4074 | // Registers used over whole function: |
| 4075 | // t2 : allocated object (tagged) |
| 4076 | // t5 : mapped parameter count (tagged) |
| 4077 | |
| 4078 | __ lw(a1, MemOperand(sp, 0 * kPointerSize)); |
| 4079 | // a1 = parameter count (tagged) |
| 4080 | |
| 4081 | // Check if the calling frame is an arguments adaptor frame. |
| 4082 | Label runtime; |
| 4083 | Label adaptor_frame, try_allocate; |
| 4084 | __ lw(a3, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 4085 | __ lw(a2, MemOperand(a3, StandardFrameConstants::kContextOffset)); |
| 4086 | __ Branch(&adaptor_frame, eq, a2, |
| 4087 | Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4088 | |
| 4089 | // No adaptor, parameter count = argument count. |
| 4090 | __ mov(a2, a1); |
| 4091 | __ b(&try_allocate); |
| 4092 | __ nop(); // Branch delay slot nop. |
| 4093 | |
| 4094 | // We have an adaptor frame. Patch the parameters pointer. |
| 4095 | __ bind(&adaptor_frame); |
| 4096 | __ lw(a2, MemOperand(a3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4097 | __ sll(t6, a2, 1); |
| 4098 | __ Addu(a3, a3, Operand(t6)); |
| 4099 | __ Addu(a3, a3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 4100 | __ sw(a3, MemOperand(sp, 1 * kPointerSize)); |
| 4101 | |
| 4102 | // a1 = parameter count (tagged) |
| 4103 | // a2 = argument count (tagged) |
| 4104 | // Compute the mapped parameter count = min(a1, a2) in a1. |
| 4105 | Label skip_min; |
| 4106 | __ Branch(&skip_min, lt, a1, Operand(a2)); |
| 4107 | __ mov(a1, a2); |
| 4108 | __ bind(&skip_min); |
| 4109 | |
| 4110 | __ bind(&try_allocate); |
| 4111 | |
| 4112 | // Compute the sizes of backing store, parameter map, and arguments object. |
| 4113 | // 1. Parameter map, has 2 extra words containing context and backing store. |
| 4114 | const int kParameterMapHeaderSize = |
| 4115 | FixedArray::kHeaderSize + 2 * kPointerSize; |
| 4116 | // If there are no mapped parameters, we do not need the parameter_map. |
| 4117 | Label param_map_size; |
| 4118 | ASSERT_EQ(0, Smi::FromInt(0)); |
| 4119 | __ Branch(USE_DELAY_SLOT, ¶m_map_size, eq, a1, Operand(zero_reg)); |
| 4120 | __ mov(t5, zero_reg); // In delay slot: param map size = 0 when a1 == 0. |
| 4121 | __ sll(t5, a1, 1); |
| 4122 | __ addiu(t5, t5, kParameterMapHeaderSize); |
| 4123 | __ bind(¶m_map_size); |
| 4124 | |
| 4125 | // 2. Backing store. |
| 4126 | __ sll(t6, a2, 1); |
| 4127 | __ Addu(t5, t5, Operand(t6)); |
| 4128 | __ Addu(t5, t5, Operand(FixedArray::kHeaderSize)); |
| 4129 | |
| 4130 | // 3. Arguments object. |
| 4131 | __ Addu(t5, t5, Operand(Heap::kArgumentsObjectSize)); |
| 4132 | |
| 4133 | // Do the allocation of all three objects in one go. |
| 4134 | __ AllocateInNewSpace(t5, v0, a3, t0, &runtime, TAG_OBJECT); |
| 4135 | |
| 4136 | // v0 = address of new object(s) (tagged) |
| 4137 | // a2 = argument count (tagged) |
| 4138 | // Get the arguments boilerplate from the current (global) context into t0. |
| 4139 | const int kNormalOffset = |
| 4140 | Context::SlotOffset(Context::ARGUMENTS_BOILERPLATE_INDEX); |
| 4141 | const int kAliasedOffset = |
| 4142 | Context::SlotOffset(Context::ALIASED_ARGUMENTS_BOILERPLATE_INDEX); |
| 4143 | |
| 4144 | __ lw(t0, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 4145 | __ lw(t0, FieldMemOperand(t0, GlobalObject::kGlobalContextOffset)); |
| 4146 | Label skip2_ne, skip2_eq; |
| 4147 | __ Branch(&skip2_ne, ne, a1, Operand(zero_reg)); |
| 4148 | __ lw(t0, MemOperand(t0, kNormalOffset)); |
| 4149 | __ bind(&skip2_ne); |
| 4150 | |
| 4151 | __ Branch(&skip2_eq, eq, a1, Operand(zero_reg)); |
| 4152 | __ lw(t0, MemOperand(t0, kAliasedOffset)); |
| 4153 | __ bind(&skip2_eq); |
| 4154 | |
| 4155 | // v0 = address of new object (tagged) |
| 4156 | // a1 = mapped parameter count (tagged) |
| 4157 | // a2 = argument count (tagged) |
| 4158 | // t0 = address of boilerplate object (tagged) |
| 4159 | // Copy the JS object part. |
| 4160 | for (int i = 0; i < JSObject::kHeaderSize; i += kPointerSize) { |
| 4161 | __ lw(a3, FieldMemOperand(t0, i)); |
| 4162 | __ sw(a3, FieldMemOperand(v0, i)); |
| 4163 | } |
| 4164 | |
| 4165 | // Setup the callee in-object property. |
| 4166 | STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1); |
| 4167 | __ lw(a3, MemOperand(sp, 2 * kPointerSize)); |
| 4168 | const int kCalleeOffset = JSObject::kHeaderSize + |
| 4169 | Heap::kArgumentsCalleeIndex * kPointerSize; |
| 4170 | __ sw(a3, FieldMemOperand(v0, kCalleeOffset)); |
| 4171 | |
| 4172 | // Use the length (smi tagged) and set that as an in-object property too. |
| 4173 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| 4174 | const int kLengthOffset = JSObject::kHeaderSize + |
| 4175 | Heap::kArgumentsLengthIndex * kPointerSize; |
| 4176 | __ sw(a2, FieldMemOperand(v0, kLengthOffset)); |
| 4177 | |
| 4178 | // Setup the elements pointer in the allocated arguments object. |
| 4179 | // If we allocated a parameter map, t0 will point there, otherwise |
| 4180 | // it will point to the backing store. |
| 4181 | __ Addu(t0, v0, Operand(Heap::kArgumentsObjectSize)); |
| 4182 | __ sw(t0, FieldMemOperand(v0, JSObject::kElementsOffset)); |
| 4183 | |
| 4184 | // v0 = address of new object (tagged) |
| 4185 | // a1 = mapped parameter count (tagged) |
| 4186 | // a2 = argument count (tagged) |
| 4187 | // t0 = address of parameter map or backing store (tagged) |
| 4188 | // Initialize parameter map. If there are no mapped arguments, we're done. |
| 4189 | Label skip_parameter_map; |
| 4190 | Label skip3; |
| 4191 | __ Branch(&skip3, ne, a1, Operand(Smi::FromInt(0))); |
| 4192 | // Move backing store address to a3, because it is |
| 4193 | // expected there when filling in the unmapped arguments. |
| 4194 | __ mov(a3, t0); |
| 4195 | __ bind(&skip3); |
| 4196 | |
| 4197 | __ Branch(&skip_parameter_map, eq, a1, Operand(Smi::FromInt(0))); |
| 4198 | |
| 4199 | __ LoadRoot(t2, Heap::kNonStrictArgumentsElementsMapRootIndex); |
| 4200 | __ sw(t2, FieldMemOperand(t0, FixedArray::kMapOffset)); |
| 4201 | __ Addu(t2, a1, Operand(Smi::FromInt(2))); |
| 4202 | __ sw(t2, FieldMemOperand(t0, FixedArray::kLengthOffset)); |
| 4203 | __ sw(cp, FieldMemOperand(t0, FixedArray::kHeaderSize + 0 * kPointerSize)); |
| 4204 | __ sll(t6, a1, 1); |
| 4205 | __ Addu(t2, t0, Operand(t6)); |
| 4206 | __ Addu(t2, t2, Operand(kParameterMapHeaderSize)); |
| 4207 | __ sw(t2, FieldMemOperand(t0, FixedArray::kHeaderSize + 1 * kPointerSize)); |
| 4208 | |
| 4209 | // Copy the parameter slots and the holes in the arguments. |
| 4210 | // We need to fill in mapped_parameter_count slots. They index the context, |
| 4211 | // where parameters are stored in reverse order, at |
| 4212 | // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| 4213 | // The mapped parameter thus need to get indices |
| 4214 | // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| 4215 | // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| 4216 | // We loop from right to left. |
| 4217 | Label parameters_loop, parameters_test; |
| 4218 | __ mov(t2, a1); |
| 4219 | __ lw(t5, MemOperand(sp, 0 * kPointerSize)); |
| 4220 | __ Addu(t5, t5, Operand(Smi::FromInt(Context::MIN_CONTEXT_SLOTS))); |
| 4221 | __ Subu(t5, t5, Operand(a1)); |
| 4222 | __ LoadRoot(t3, Heap::kTheHoleValueRootIndex); |
| 4223 | __ sll(t6, t2, 1); |
| 4224 | __ Addu(a3, t0, Operand(t6)); |
| 4225 | __ Addu(a3, a3, Operand(kParameterMapHeaderSize)); |
| 4226 | |
| 4227 | // t2 = loop variable (tagged) |
| 4228 | // a1 = mapping index (tagged) |
| 4229 | // a3 = address of backing store (tagged) |
| 4230 | // t0 = address of parameter map (tagged) |
| 4231 | // t1 = temporary scratch (a.o., for address calculation) |
| 4232 | // t3 = the hole value |
| 4233 | __ jmp(¶meters_test); |
| 4234 | |
| 4235 | __ bind(¶meters_loop); |
| 4236 | __ Subu(t2, t2, Operand(Smi::FromInt(1))); |
| 4237 | __ sll(t1, t2, 1); |
| 4238 | __ Addu(t1, t1, Operand(kParameterMapHeaderSize - kHeapObjectTag)); |
| 4239 | __ Addu(t6, t0, t1); |
| 4240 | __ sw(t5, MemOperand(t6)); |
| 4241 | __ Subu(t1, t1, Operand(kParameterMapHeaderSize - FixedArray::kHeaderSize)); |
| 4242 | __ Addu(t6, a3, t1); |
| 4243 | __ sw(t3, MemOperand(t6)); |
| 4244 | __ Addu(t5, t5, Operand(Smi::FromInt(1))); |
| 4245 | __ bind(¶meters_test); |
| 4246 | __ Branch(¶meters_loop, ne, t2, Operand(Smi::FromInt(0))); |
| 4247 | |
| 4248 | __ bind(&skip_parameter_map); |
| 4249 | // a2 = argument count (tagged) |
| 4250 | // a3 = address of backing store (tagged) |
| 4251 | // t1 = scratch |
| 4252 | // Copy arguments header and remaining slots (if there are any). |
| 4253 | __ LoadRoot(t1, Heap::kFixedArrayMapRootIndex); |
| 4254 | __ sw(t1, FieldMemOperand(a3, FixedArray::kMapOffset)); |
| 4255 | __ sw(a2, FieldMemOperand(a3, FixedArray::kLengthOffset)); |
| 4256 | |
| 4257 | Label arguments_loop, arguments_test; |
| 4258 | __ mov(t5, a1); |
| 4259 | __ lw(t0, MemOperand(sp, 1 * kPointerSize)); |
| 4260 | __ sll(t6, t5, 1); |
| 4261 | __ Subu(t0, t0, Operand(t6)); |
| 4262 | __ jmp(&arguments_test); |
| 4263 | |
| 4264 | __ bind(&arguments_loop); |
| 4265 | __ Subu(t0, t0, Operand(kPointerSize)); |
| 4266 | __ lw(t2, MemOperand(t0, 0)); |
| 4267 | __ sll(t6, t5, 1); |
| 4268 | __ Addu(t1, a3, Operand(t6)); |
| 4269 | __ sw(t2, FieldMemOperand(t1, FixedArray::kHeaderSize)); |
| 4270 | __ Addu(t5, t5, Operand(Smi::FromInt(1))); |
| 4271 | |
| 4272 | __ bind(&arguments_test); |
| 4273 | __ Branch(&arguments_loop, lt, t5, Operand(a2)); |
| 4274 | |
| 4275 | // Return and remove the on-stack parameters. |
| 4276 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 4277 | __ Ret(); |
| 4278 | |
| 4279 | // Do the runtime call to allocate the arguments object. |
| 4280 | // a2 = argument count (taggged) |
| 4281 | __ bind(&runtime); |
| 4282 | __ sw(a2, MemOperand(sp, 0 * kPointerSize)); // Patch argument count. |
| 4283 | __ TailCallRuntime(Runtime::kNewArgumentsFast, 3, 1); |
| 4284 | } |
| 4285 | |
| 4286 | |
| 4287 | void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { |
| 4288 | // sp[0] : number of parameters |
| 4289 | // sp[4] : receiver displacement |
| 4290 | // sp[8] : function |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4291 | // Check if the calling frame is an arguments adaptor frame. |
| 4292 | Label adaptor_frame, try_allocate, runtime; |
| 4293 | __ lw(a2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 4294 | __ lw(a3, MemOperand(a2, StandardFrameConstants::kContextOffset)); |
| 4295 | __ Branch(&adaptor_frame, |
| 4296 | eq, |
| 4297 | a3, |
| 4298 | Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4299 | |
| 4300 | // Get the length from the frame. |
| 4301 | __ lw(a1, MemOperand(sp, 0)); |
| 4302 | __ Branch(&try_allocate); |
| 4303 | |
| 4304 | // Patch the arguments.length and the parameters pointer. |
| 4305 | __ bind(&adaptor_frame); |
| 4306 | __ lw(a1, MemOperand(a2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4307 | __ sw(a1, MemOperand(sp, 0)); |
| 4308 | __ sll(at, a1, kPointerSizeLog2 - kSmiTagSize); |
| 4309 | __ Addu(a3, a2, Operand(at)); |
| 4310 | |
| 4311 | __ Addu(a3, a3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 4312 | __ sw(a3, MemOperand(sp, 1 * kPointerSize)); |
| 4313 | |
| 4314 | // Try the new space allocation. Start out with computing the size |
| 4315 | // of the arguments object and the elements array in words. |
| 4316 | Label add_arguments_object; |
| 4317 | __ bind(&try_allocate); |
| 4318 | __ Branch(&add_arguments_object, eq, a1, Operand(zero_reg)); |
| 4319 | __ srl(a1, a1, kSmiTagSize); |
| 4320 | |
| 4321 | __ Addu(a1, a1, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 4322 | __ bind(&add_arguments_object); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4323 | __ Addu(a1, a1, Operand(Heap::kArgumentsObjectSizeStrict / kPointerSize)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4324 | |
| 4325 | // Do the allocation of both objects in one go. |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4326 | __ AllocateInNewSpace(a1, |
| 4327 | v0, |
| 4328 | a2, |
| 4329 | a3, |
| 4330 | &runtime, |
| 4331 | static_cast<AllocationFlags>(TAG_OBJECT | |
| 4332 | SIZE_IN_WORDS)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4333 | |
| 4334 | // Get the arguments boilerplate from the current (global) context. |
| 4335 | __ lw(t0, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 4336 | __ lw(t0, FieldMemOperand(t0, GlobalObject::kGlobalContextOffset)); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4337 | __ lw(t0, MemOperand(t0, Context::SlotOffset( |
| 4338 | Context::STRICT_MODE_ARGUMENTS_BOILERPLATE_INDEX))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4339 | |
| 4340 | // Copy the JS object part. |
| 4341 | __ CopyFields(v0, t0, a3.bit(), JSObject::kHeaderSize / kPointerSize); |
| 4342 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4343 | // Get the length (smi tagged) and set that as an in-object property too. |
| 4344 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| 4345 | __ lw(a1, MemOperand(sp, 0 * kPointerSize)); |
| 4346 | __ sw(a1, FieldMemOperand(v0, JSObject::kHeaderSize + |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4347 | Heap::kArgumentsLengthIndex * kPointerSize)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4348 | |
| 4349 | Label done; |
| 4350 | __ Branch(&done, eq, a1, Operand(zero_reg)); |
| 4351 | |
| 4352 | // Get the parameters pointer from the stack. |
| 4353 | __ lw(a2, MemOperand(sp, 1 * kPointerSize)); |
| 4354 | |
| 4355 | // Setup the elements pointer in the allocated arguments object and |
| 4356 | // initialize the header in the elements fixed array. |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4357 | __ Addu(t0, v0, Operand(Heap::kArgumentsObjectSizeStrict)); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4358 | __ sw(t0, FieldMemOperand(v0, JSObject::kElementsOffset)); |
| 4359 | __ LoadRoot(a3, Heap::kFixedArrayMapRootIndex); |
| 4360 | __ sw(a3, FieldMemOperand(t0, FixedArray::kMapOffset)); |
| 4361 | __ sw(a1, FieldMemOperand(t0, FixedArray::kLengthOffset)); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4362 | // Untag the length for the loop. |
| 4363 | __ srl(a1, a1, kSmiTagSize); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4364 | |
| 4365 | // Copy the fixed array slots. |
| 4366 | Label loop; |
| 4367 | // Setup t0 to point to the first array slot. |
| 4368 | __ Addu(t0, t0, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4369 | __ bind(&loop); |
| 4370 | // Pre-decrement a2 with kPointerSize on each iteration. |
| 4371 | // Pre-decrement in order to skip receiver. |
| 4372 | __ Addu(a2, a2, Operand(-kPointerSize)); |
| 4373 | __ lw(a3, MemOperand(a2)); |
| 4374 | // Post-increment t0 with kPointerSize on each iteration. |
| 4375 | __ sw(a3, MemOperand(t0)); |
| 4376 | __ Addu(t0, t0, Operand(kPointerSize)); |
| 4377 | __ Subu(a1, a1, Operand(1)); |
| 4378 | __ Branch(&loop, ne, a1, Operand(zero_reg)); |
| 4379 | |
| 4380 | // Return and remove the on-stack parameters. |
| 4381 | __ bind(&done); |
| 4382 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 4383 | __ Ret(); |
| 4384 | |
| 4385 | // Do the runtime call to allocate the arguments object. |
| 4386 | __ bind(&runtime); |
lrn@chromium.org | ac2828d | 2011-06-23 06:29:21 +0000 | [diff] [blame] | 4387 | __ TailCallRuntime(Runtime::kNewStrictArgumentsFast, 3, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4388 | } |
| 4389 | |
| 4390 | |
| 4391 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4392 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 4393 | // time or if regexp entry in generated code is turned off runtime switch or |
| 4394 | // at compilation. |
| 4395 | #ifdef V8_INTERPRETED_REGEXP |
| 4396 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 4397 | #else // V8_INTERPRETED_REGEXP |
| 4398 | if (!FLAG_regexp_entry_native) { |
| 4399 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 4400 | return; |
| 4401 | } |
| 4402 | |
| 4403 | // Stack frame on entry. |
| 4404 | // sp[0]: last_match_info (expected JSArray) |
| 4405 | // sp[4]: previous index |
| 4406 | // sp[8]: subject string |
| 4407 | // sp[12]: JSRegExp object |
| 4408 | |
| 4409 | static const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 4410 | static const int kPreviousIndexOffset = 1 * kPointerSize; |
| 4411 | static const int kSubjectOffset = 2 * kPointerSize; |
| 4412 | static const int kJSRegExpOffset = 3 * kPointerSize; |
| 4413 | |
| 4414 | Label runtime, invoke_regexp; |
| 4415 | |
| 4416 | // Allocation of registers for this function. These are in callee save |
| 4417 | // registers and will be preserved by the call to the native RegExp code, as |
| 4418 | // this code is called using the normal C calling convention. When calling |
| 4419 | // directly from generated code the native RegExp code will not do a GC and |
| 4420 | // therefore the content of these registers are safe to use after the call. |
| 4421 | // MIPS - using s0..s2, since we are not using CEntry Stub. |
| 4422 | Register subject = s0; |
| 4423 | Register regexp_data = s1; |
| 4424 | Register last_match_info_elements = s2; |
| 4425 | |
| 4426 | // Ensure that a RegExp stack is allocated. |
| 4427 | ExternalReference address_of_regexp_stack_memory_address = |
| 4428 | ExternalReference::address_of_regexp_stack_memory_address( |
| 4429 | masm->isolate()); |
| 4430 | ExternalReference address_of_regexp_stack_memory_size = |
| 4431 | ExternalReference::address_of_regexp_stack_memory_size(masm->isolate()); |
| 4432 | __ li(a0, Operand(address_of_regexp_stack_memory_size)); |
| 4433 | __ lw(a0, MemOperand(a0, 0)); |
| 4434 | __ Branch(&runtime, eq, a0, Operand(zero_reg)); |
| 4435 | |
| 4436 | // Check that the first argument is a JSRegExp object. |
| 4437 | __ lw(a0, MemOperand(sp, kJSRegExpOffset)); |
| 4438 | STATIC_ASSERT(kSmiTag == 0); |
| 4439 | __ JumpIfSmi(a0, &runtime); |
| 4440 | __ GetObjectType(a0, a1, a1); |
| 4441 | __ Branch(&runtime, ne, a1, Operand(JS_REGEXP_TYPE)); |
| 4442 | |
| 4443 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 4444 | __ lw(regexp_data, FieldMemOperand(a0, JSRegExp::kDataOffset)); |
| 4445 | if (FLAG_debug_code) { |
| 4446 | __ And(t0, regexp_data, Operand(kSmiTagMask)); |
| 4447 | __ Check(nz, |
| 4448 | "Unexpected type for RegExp data, FixedArray expected", |
| 4449 | t0, |
| 4450 | Operand(zero_reg)); |
| 4451 | __ GetObjectType(regexp_data, a0, a0); |
| 4452 | __ Check(eq, |
| 4453 | "Unexpected type for RegExp data, FixedArray expected", |
| 4454 | a0, |
| 4455 | Operand(FIXED_ARRAY_TYPE)); |
| 4456 | } |
| 4457 | |
| 4458 | // regexp_data: RegExp data (FixedArray) |
| 4459 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 4460 | __ lw(a0, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 4461 | __ Branch(&runtime, ne, a0, Operand(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 4462 | |
| 4463 | // regexp_data: RegExp data (FixedArray) |
| 4464 | // Check that the number of captures fit in the static offsets vector buffer. |
| 4465 | __ lw(a2, |
| 4466 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 4467 | // Calculate number of capture registers (number_of_captures + 1) * 2. This |
| 4468 | // uses the asumption that smis are 2 * their untagged value. |
| 4469 | STATIC_ASSERT(kSmiTag == 0); |
| 4470 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 4471 | __ Addu(a2, a2, Operand(2)); // a2 was a smi. |
| 4472 | // Check that the static offsets vector buffer is large enough. |
| 4473 | __ Branch(&runtime, hi, a2, Operand(OffsetsVector::kStaticOffsetsVectorSize)); |
| 4474 | |
| 4475 | // a2: Number of capture registers |
| 4476 | // regexp_data: RegExp data (FixedArray) |
| 4477 | // Check that the second argument is a string. |
| 4478 | __ lw(subject, MemOperand(sp, kSubjectOffset)); |
| 4479 | __ JumpIfSmi(subject, &runtime); |
| 4480 | __ GetObjectType(subject, a0, a0); |
| 4481 | __ And(a0, a0, Operand(kIsNotStringMask)); |
| 4482 | STATIC_ASSERT(kStringTag == 0); |
| 4483 | __ Branch(&runtime, ne, a0, Operand(zero_reg)); |
| 4484 | |
| 4485 | // Get the length of the string to r3. |
| 4486 | __ lw(a3, FieldMemOperand(subject, String::kLengthOffset)); |
| 4487 | |
| 4488 | // a2: Number of capture registers |
| 4489 | // a3: Length of subject string as a smi |
| 4490 | // subject: Subject string |
| 4491 | // regexp_data: RegExp data (FixedArray) |
| 4492 | // Check that the third argument is a positive smi less than the subject |
| 4493 | // string length. A negative value will be greater (unsigned comparison). |
| 4494 | __ lw(a0, MemOperand(sp, kPreviousIndexOffset)); |
| 4495 | __ And(at, a0, Operand(kSmiTagMask)); |
| 4496 | __ Branch(&runtime, ne, at, Operand(zero_reg)); |
| 4497 | __ Branch(&runtime, ls, a3, Operand(a0)); |
| 4498 | |
| 4499 | // a2: Number of capture registers |
| 4500 | // subject: Subject string |
| 4501 | // regexp_data: RegExp data (FixedArray) |
| 4502 | // Check that the fourth object is a JSArray object. |
| 4503 | __ lw(a0, MemOperand(sp, kLastMatchInfoOffset)); |
| 4504 | __ JumpIfSmi(a0, &runtime); |
| 4505 | __ GetObjectType(a0, a1, a1); |
| 4506 | __ Branch(&runtime, ne, a1, Operand(JS_ARRAY_TYPE)); |
| 4507 | // Check that the JSArray is in fast case. |
| 4508 | __ lw(last_match_info_elements, |
| 4509 | FieldMemOperand(a0, JSArray::kElementsOffset)); |
| 4510 | __ lw(a0, FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| 4511 | __ Branch(&runtime, ne, a0, Operand( |
| 4512 | masm->isolate()->factory()->fixed_array_map())); |
| 4513 | // Check that the last match info has space for the capture registers and the |
| 4514 | // additional information. |
| 4515 | __ lw(a0, |
| 4516 | FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| 4517 | __ Addu(a2, a2, Operand(RegExpImpl::kLastMatchOverhead)); |
| 4518 | __ sra(at, a0, kSmiTagSize); // Untag length for comparison. |
| 4519 | __ Branch(&runtime, gt, a2, Operand(at)); |
| 4520 | // subject: Subject string |
| 4521 | // regexp_data: RegExp data (FixedArray) |
| 4522 | // Check the representation and encoding of the subject string. |
| 4523 | Label seq_string; |
| 4524 | __ lw(a0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 4525 | __ lbu(a0, FieldMemOperand(a0, Map::kInstanceTypeOffset)); |
| 4526 | // First check for flat string. |
| 4527 | __ And(at, a0, Operand(kIsNotStringMask | kStringRepresentationMask)); |
| 4528 | STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
| 4529 | __ Branch(&seq_string, eq, at, Operand(zero_reg)); |
| 4530 | |
| 4531 | // subject: Subject string |
| 4532 | // a0: instance type if Subject string |
| 4533 | // regexp_data: RegExp data (FixedArray) |
| 4534 | // Check for flat cons string. |
| 4535 | // A flat cons string is a cons string where the second part is the empty |
| 4536 | // string. In that case the subject string is just the first part of the cons |
| 4537 | // string. Also in this case the first part of the cons string is known to be |
| 4538 | // a sequential string or an external string. |
| 4539 | STATIC_ASSERT(kExternalStringTag != 0); |
| 4540 | STATIC_ASSERT((kConsStringTag & kExternalStringTag) == 0); |
| 4541 | __ And(at, a0, Operand(kIsNotStringMask | kExternalStringTag)); |
| 4542 | __ Branch(&runtime, ne, at, Operand(zero_reg)); |
| 4543 | __ lw(a0, FieldMemOperand(subject, ConsString::kSecondOffset)); |
| 4544 | __ LoadRoot(a1, Heap::kEmptyStringRootIndex); |
| 4545 | __ Branch(&runtime, ne, a0, Operand(a1)); |
| 4546 | __ lw(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
| 4547 | __ lw(a0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 4548 | __ lbu(a0, FieldMemOperand(a0, Map::kInstanceTypeOffset)); |
| 4549 | // Is first part a flat string? |
| 4550 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4551 | __ And(at, a0, Operand(kStringRepresentationMask)); |
| 4552 | __ Branch(&runtime, ne, at, Operand(zero_reg)); |
| 4553 | |
| 4554 | __ bind(&seq_string); |
| 4555 | // subject: Subject string |
| 4556 | // regexp_data: RegExp data (FixedArray) |
| 4557 | // a0: Instance type of subject string |
| 4558 | STATIC_ASSERT(kStringEncodingMask == 4); |
| 4559 | STATIC_ASSERT(kAsciiStringTag == 4); |
| 4560 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 4561 | // Find the code object based on the assumptions above. |
| 4562 | __ And(a0, a0, Operand(kStringEncodingMask)); // Non-zero for ascii. |
| 4563 | __ lw(t9, FieldMemOperand(regexp_data, JSRegExp::kDataAsciiCodeOffset)); |
| 4564 | __ sra(a3, a0, 2); // a3 is 1 for ascii, 0 for UC16 (usyed below). |
| 4565 | __ lw(t0, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset)); |
| 4566 | __ movz(t9, t0, a0); // If UC16 (a0 is 0), replace t9 w/kDataUC16CodeOffset. |
| 4567 | |
| 4568 | // Check that the irregexp code has been generated for the actual string |
sgjesse@chromium.org | 6db8871 | 2011-07-11 11:41:22 +0000 | [diff] [blame] | 4569 | // encoding. If it has, the field contains a code object otherwise it contains |
| 4570 | // a smi (code flushing support). |
| 4571 | __ JumpIfSmi(t9, &runtime); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4572 | |
| 4573 | // a3: encoding of subject string (1 if ASCII, 0 if two_byte); |
| 4574 | // t9: code |
| 4575 | // subject: Subject string |
| 4576 | // regexp_data: RegExp data (FixedArray) |
| 4577 | // Load used arguments before starting to push arguments for call to native |
| 4578 | // RegExp code to avoid handling changing stack height. |
| 4579 | __ lw(a1, MemOperand(sp, kPreviousIndexOffset)); |
| 4580 | __ sra(a1, a1, kSmiTagSize); // Untag the Smi. |
| 4581 | |
| 4582 | // a1: previous index |
| 4583 | // a3: encoding of subject string (1 if ASCII, 0 if two_byte); |
| 4584 | // t9: code |
| 4585 | // subject: Subject string |
| 4586 | // regexp_data: RegExp data (FixedArray) |
| 4587 | // All checks done. Now push arguments for native regexp code. |
| 4588 | __ IncrementCounter(masm->isolate()->counters()->regexp_entry_native(), |
| 4589 | 1, a0, a2); |
| 4590 | |
| 4591 | // Isolates: note we add an additional parameter here (isolate pointer). |
| 4592 | static const int kRegExpExecuteArguments = 8; |
| 4593 | static const int kParameterRegisters = 4; |
| 4594 | __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters); |
| 4595 | |
| 4596 | // Stack pointer now points to cell where return address is to be written. |
| 4597 | // Arguments are before that on the stack or in registers, meaning we |
| 4598 | // treat the return address as argument 5. Thus every argument after that |
| 4599 | // needs to be shifted back by 1. Since DirectCEntryStub will handle |
| 4600 | // allocating space for the c argument slots, we don't need to calculate |
| 4601 | // that into the argument positions on the stack. This is how the stack will |
| 4602 | // look (sp meaning the value of sp at this moment): |
| 4603 | // [sp + 4] - Argument 8 |
| 4604 | // [sp + 3] - Argument 7 |
| 4605 | // [sp + 2] - Argument 6 |
| 4606 | // [sp + 1] - Argument 5 |
| 4607 | // [sp + 0] - saved ra |
| 4608 | |
| 4609 | // Argument 8: Pass current isolate address. |
| 4610 | // CFunctionArgumentOperand handles MIPS stack argument slots. |
| 4611 | __ li(a0, Operand(ExternalReference::isolate_address())); |
| 4612 | __ sw(a0, MemOperand(sp, 4 * kPointerSize)); |
| 4613 | |
| 4614 | // Argument 7: Indicate that this is a direct call from JavaScript. |
| 4615 | __ li(a0, Operand(1)); |
| 4616 | __ sw(a0, MemOperand(sp, 3 * kPointerSize)); |
| 4617 | |
| 4618 | // Argument 6: Start (high end) of backtracking stack memory area. |
| 4619 | __ li(a0, Operand(address_of_regexp_stack_memory_address)); |
| 4620 | __ lw(a0, MemOperand(a0, 0)); |
| 4621 | __ li(a2, Operand(address_of_regexp_stack_memory_size)); |
| 4622 | __ lw(a2, MemOperand(a2, 0)); |
| 4623 | __ addu(a0, a0, a2); |
| 4624 | __ sw(a0, MemOperand(sp, 2 * kPointerSize)); |
| 4625 | |
| 4626 | // Argument 5: static offsets vector buffer. |
| 4627 | __ li(a0, Operand( |
| 4628 | ExternalReference::address_of_static_offsets_vector(masm->isolate()))); |
| 4629 | __ sw(a0, MemOperand(sp, 1 * kPointerSize)); |
| 4630 | |
| 4631 | // For arguments 4 and 3 get string length, calculate start of string data |
| 4632 | // and calculate the shift of the index (0 for ASCII and 1 for two byte). |
| 4633 | __ lw(a0, FieldMemOperand(subject, String::kLengthOffset)); |
| 4634 | __ sra(a0, a0, kSmiTagSize); |
| 4635 | STATIC_ASSERT(SeqAsciiString::kHeaderSize == SeqTwoByteString::kHeaderSize); |
| 4636 | __ Addu(t0, subject, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 4637 | __ Xor(a3, a3, Operand(1)); // 1 for 2-byte str, 0 for 1-byte. |
| 4638 | // Argument 4 (a3): End of string data |
| 4639 | // Argument 3 (a2): Start of string data |
| 4640 | __ sllv(t1, a1, a3); |
| 4641 | __ addu(a2, t0, t1); |
| 4642 | __ sllv(t1, a0, a3); |
| 4643 | __ addu(a3, t0, t1); |
| 4644 | |
| 4645 | // Argument 2 (a1): Previous index. |
| 4646 | // Already there |
| 4647 | |
| 4648 | // Argument 1 (a0): Subject string. |
| 4649 | __ mov(a0, subject); |
| 4650 | |
| 4651 | // Locate the code entry and call it. |
| 4652 | __ Addu(t9, t9, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4653 | DirectCEntryStub stub; |
| 4654 | stub.GenerateCall(masm, t9); |
| 4655 | |
| 4656 | __ LeaveExitFrame(false, no_reg); |
| 4657 | |
| 4658 | // v0: result |
| 4659 | // subject: subject string (callee saved) |
| 4660 | // regexp_data: RegExp data (callee saved) |
| 4661 | // last_match_info_elements: Last match info elements (callee saved) |
| 4662 | |
| 4663 | // Check the result. |
| 4664 | |
| 4665 | Label success; |
| 4666 | __ Branch(&success, eq, v0, Operand(NativeRegExpMacroAssembler::SUCCESS)); |
| 4667 | Label failure; |
| 4668 | __ Branch(&failure, eq, v0, Operand(NativeRegExpMacroAssembler::FAILURE)); |
| 4669 | // If not exception it can only be retry. Handle that in the runtime system. |
| 4670 | __ Branch(&runtime, ne, v0, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
| 4671 | // Result must now be exception. If there is no pending exception already a |
| 4672 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 4673 | // haven't created the exception yet. Handle that in the runtime system. |
| 4674 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
| 4675 | __ li(a1, Operand( |
| 4676 | ExternalReference::the_hole_value_location(masm->isolate()))); |
| 4677 | __ lw(a1, MemOperand(a1, 0)); |
| 4678 | __ li(a2, Operand(ExternalReference(Isolate::k_pending_exception_address, |
| 4679 | masm->isolate()))); |
| 4680 | __ lw(v0, MemOperand(a2, 0)); |
| 4681 | __ Branch(&runtime, eq, v0, Operand(a1)); |
| 4682 | |
| 4683 | __ sw(a1, MemOperand(a2, 0)); // Clear pending exception. |
| 4684 | |
| 4685 | // Check if the exception is a termination. If so, throw as uncatchable. |
| 4686 | __ LoadRoot(a0, Heap::kTerminationExceptionRootIndex); |
| 4687 | Label termination_exception; |
| 4688 | __ Branch(&termination_exception, eq, v0, Operand(a0)); |
| 4689 | |
| 4690 | __ Throw(a0); // Expects thrown value in v0. |
| 4691 | |
| 4692 | __ bind(&termination_exception); |
| 4693 | __ ThrowUncatchable(TERMINATION, v0); // Expects thrown value in v0. |
| 4694 | |
| 4695 | __ bind(&failure); |
| 4696 | // For failure and exception return null. |
| 4697 | __ li(v0, Operand(masm->isolate()->factory()->null_value())); |
| 4698 | __ Addu(sp, sp, Operand(4 * kPointerSize)); |
| 4699 | __ Ret(); |
| 4700 | |
| 4701 | // Process the result from the native regexp code. |
| 4702 | __ bind(&success); |
| 4703 | __ lw(a1, |
| 4704 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 4705 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
| 4706 | STATIC_ASSERT(kSmiTag == 0); |
| 4707 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 4708 | __ Addu(a1, a1, Operand(2)); // a1 was a smi. |
| 4709 | |
| 4710 | // a1: number of capture registers |
| 4711 | // subject: subject string |
| 4712 | // Store the capture count. |
| 4713 | __ sll(a2, a1, kSmiTagSize + kSmiShiftSize); // To smi. |
| 4714 | __ sw(a2, FieldMemOperand(last_match_info_elements, |
| 4715 | RegExpImpl::kLastCaptureCountOffset)); |
| 4716 | // Store last subject and last input. |
| 4717 | __ mov(a3, last_match_info_elements); // Moved up to reduce latency. |
| 4718 | __ sw(subject, |
| 4719 | FieldMemOperand(last_match_info_elements, |
| 4720 | RegExpImpl::kLastSubjectOffset)); |
| 4721 | __ RecordWrite(a3, Operand(RegExpImpl::kLastSubjectOffset), a2, t0); |
| 4722 | __ sw(subject, |
| 4723 | FieldMemOperand(last_match_info_elements, |
| 4724 | RegExpImpl::kLastInputOffset)); |
| 4725 | __ mov(a3, last_match_info_elements); |
| 4726 | __ RecordWrite(a3, Operand(RegExpImpl::kLastInputOffset), a2, t0); |
| 4727 | |
| 4728 | // Get the static offsets vector filled by the native regexp code. |
| 4729 | ExternalReference address_of_static_offsets_vector = |
| 4730 | ExternalReference::address_of_static_offsets_vector(masm->isolate()); |
| 4731 | __ li(a2, Operand(address_of_static_offsets_vector)); |
| 4732 | |
| 4733 | // a1: number of capture registers |
| 4734 | // a2: offsets vector |
| 4735 | Label next_capture, done; |
| 4736 | // Capture register counter starts from number of capture registers and |
| 4737 | // counts down until wrapping after zero. |
| 4738 | __ Addu(a0, |
| 4739 | last_match_info_elements, |
| 4740 | Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag)); |
| 4741 | __ bind(&next_capture); |
| 4742 | __ Subu(a1, a1, Operand(1)); |
| 4743 | __ Branch(&done, lt, a1, Operand(zero_reg)); |
| 4744 | // Read the value from the static offsets vector buffer. |
| 4745 | __ lw(a3, MemOperand(a2, 0)); |
| 4746 | __ addiu(a2, a2, kPointerSize); |
| 4747 | // Store the smi value in the last match info. |
| 4748 | __ sll(a3, a3, kSmiTagSize); // Convert to Smi. |
| 4749 | __ sw(a3, MemOperand(a0, 0)); |
| 4750 | __ Branch(&next_capture, USE_DELAY_SLOT); |
| 4751 | __ addiu(a0, a0, kPointerSize); // In branch delay slot. |
| 4752 | |
| 4753 | __ bind(&done); |
| 4754 | |
| 4755 | // Return last match info. |
| 4756 | __ lw(v0, MemOperand(sp, kLastMatchInfoOffset)); |
| 4757 | __ Addu(sp, sp, Operand(4 * kPointerSize)); |
| 4758 | __ Ret(); |
| 4759 | |
| 4760 | // Do the runtime call to execute the regexp. |
| 4761 | __ bind(&runtime); |
| 4762 | __ TailCallRuntime(Runtime::kRegExpExec, 4, 1); |
| 4763 | #endif // V8_INTERPRETED_REGEXP |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4764 | } |
| 4765 | |
| 4766 | |
| 4767 | void RegExpConstructResultStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4768 | const int kMaxInlineLength = 100; |
| 4769 | Label slowcase; |
| 4770 | Label done; |
| 4771 | __ lw(a1, MemOperand(sp, kPointerSize * 2)); |
| 4772 | STATIC_ASSERT(kSmiTag == 0); |
| 4773 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4774 | __ JumpIfNotSmi(a1, &slowcase); |
| 4775 | __ Branch(&slowcase, hi, a1, Operand(Smi::FromInt(kMaxInlineLength))); |
| 4776 | // Smi-tagging is equivalent to multiplying by 2. |
| 4777 | // Allocate RegExpResult followed by FixedArray with size in ebx. |
| 4778 | // JSArray: [Map][empty properties][Elements][Length-smi][index][input] |
| 4779 | // Elements: [Map][Length][..elements..] |
| 4780 | // Size of JSArray with two in-object properties and the header of a |
| 4781 | // FixedArray. |
| 4782 | int objects_size = |
| 4783 | (JSRegExpResult::kSize + FixedArray::kHeaderSize) / kPointerSize; |
| 4784 | __ srl(t1, a1, kSmiTagSize + kSmiShiftSize); |
| 4785 | __ Addu(a2, t1, Operand(objects_size)); |
| 4786 | __ AllocateInNewSpace( |
| 4787 | a2, // In: Size, in words. |
| 4788 | v0, // Out: Start of allocation (tagged). |
| 4789 | a3, // Scratch register. |
| 4790 | t0, // Scratch register. |
| 4791 | &slowcase, |
| 4792 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
| 4793 | // v0: Start of allocated area, object-tagged. |
| 4794 | // a1: Number of elements in array, as smi. |
| 4795 | // t1: Number of elements, untagged. |
| 4796 | |
| 4797 | // Set JSArray map to global.regexp_result_map(). |
| 4798 | // Set empty properties FixedArray. |
| 4799 | // Set elements to point to FixedArray allocated right after the JSArray. |
| 4800 | // Interleave operations for better latency. |
| 4801 | __ lw(a2, ContextOperand(cp, Context::GLOBAL_INDEX)); |
| 4802 | __ Addu(a3, v0, Operand(JSRegExpResult::kSize)); |
| 4803 | __ li(t0, Operand(masm->isolate()->factory()->empty_fixed_array())); |
| 4804 | __ lw(a2, FieldMemOperand(a2, GlobalObject::kGlobalContextOffset)); |
| 4805 | __ sw(a3, FieldMemOperand(v0, JSObject::kElementsOffset)); |
| 4806 | __ lw(a2, ContextOperand(a2, Context::REGEXP_RESULT_MAP_INDEX)); |
| 4807 | __ sw(t0, FieldMemOperand(v0, JSObject::kPropertiesOffset)); |
| 4808 | __ sw(a2, FieldMemOperand(v0, HeapObject::kMapOffset)); |
| 4809 | |
| 4810 | // Set input, index and length fields from arguments. |
| 4811 | __ lw(a1, MemOperand(sp, kPointerSize * 0)); |
| 4812 | __ sw(a1, FieldMemOperand(v0, JSRegExpResult::kInputOffset)); |
| 4813 | __ lw(a1, MemOperand(sp, kPointerSize * 1)); |
| 4814 | __ sw(a1, FieldMemOperand(v0, JSRegExpResult::kIndexOffset)); |
| 4815 | __ lw(a1, MemOperand(sp, kPointerSize * 2)); |
| 4816 | __ sw(a1, FieldMemOperand(v0, JSArray::kLengthOffset)); |
| 4817 | |
| 4818 | // Fill out the elements FixedArray. |
| 4819 | // v0: JSArray, tagged. |
| 4820 | // a3: FixedArray, tagged. |
| 4821 | // t1: Number of elements in array, untagged. |
| 4822 | |
| 4823 | // Set map. |
| 4824 | __ li(a2, Operand(masm->isolate()->factory()->fixed_array_map())); |
| 4825 | __ sw(a2, FieldMemOperand(a3, HeapObject::kMapOffset)); |
| 4826 | // Set FixedArray length. |
| 4827 | __ sll(t2, t1, kSmiTagSize); |
| 4828 | __ sw(t2, FieldMemOperand(a3, FixedArray::kLengthOffset)); |
| 4829 | // Fill contents of fixed-array with the-hole. |
| 4830 | __ li(a2, Operand(masm->isolate()->factory()->the_hole_value())); |
| 4831 | __ Addu(a3, a3, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4832 | // Fill fixed array elements with hole. |
| 4833 | // v0: JSArray, tagged. |
| 4834 | // a2: the hole. |
| 4835 | // a3: Start of elements in FixedArray. |
| 4836 | // t1: Number of elements to fill. |
| 4837 | Label loop; |
| 4838 | __ sll(t1, t1, kPointerSizeLog2); // Convert num elements to num bytes. |
| 4839 | __ addu(t1, t1, a3); // Point past last element to store. |
| 4840 | __ bind(&loop); |
| 4841 | __ Branch(&done, ge, a3, Operand(t1)); // Break when a3 past end of elem. |
| 4842 | __ sw(a2, MemOperand(a3)); |
| 4843 | __ Branch(&loop, USE_DELAY_SLOT); |
| 4844 | __ addiu(a3, a3, kPointerSize); // In branch delay slot. |
| 4845 | |
| 4846 | __ bind(&done); |
| 4847 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 4848 | __ Ret(); |
| 4849 | |
| 4850 | __ bind(&slowcase); |
| 4851 | __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4852 | } |
| 4853 | |
| 4854 | |
| 4855 | void CallFunctionStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4856 | Label slow; |
| 4857 | |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4858 | // The receiver might implicitly be the global object. This is |
| 4859 | // indicated by passing the hole as the receiver to the call |
| 4860 | // function stub. |
| 4861 | if (ReceiverMightBeImplicit()) { |
| 4862 | Label call; |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4863 | // Get the receiver from the stack. |
| 4864 | // function, receiver [, arguments] |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4865 | __ lw(t0, MemOperand(sp, argc_ * kPointerSize)); |
| 4866 | // Call as function is indicated with the hole. |
| 4867 | __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
| 4868 | __ Branch(&call, ne, t0, Operand(at)); |
| 4869 | // Patch the receiver on the stack with the global receiver object. |
| 4870 | __ lw(a1, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 4871 | __ lw(a1, FieldMemOperand(a1, GlobalObject::kGlobalReceiverOffset)); |
| 4872 | __ sw(a1, MemOperand(sp, argc_ * kPointerSize)); |
| 4873 | __ bind(&call); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4874 | } |
| 4875 | |
| 4876 | // Get the function to call from the stack. |
| 4877 | // function, receiver [, arguments] |
| 4878 | __ lw(a1, MemOperand(sp, (argc_ + 1) * kPointerSize)); |
| 4879 | |
| 4880 | // Check that the function is really a JavaScript function. |
| 4881 | // a1: pushed function (to be verified) |
| 4882 | __ JumpIfSmi(a1, &slow); |
| 4883 | // Get the map of the function object. |
| 4884 | __ GetObjectType(a1, a2, a2); |
| 4885 | __ Branch(&slow, ne, a2, Operand(JS_FUNCTION_TYPE)); |
| 4886 | |
| 4887 | // Fast-case: Invoke the function now. |
| 4888 | // a1: pushed function |
| 4889 | ParameterCount actual(argc_); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4890 | |
| 4891 | if (ReceiverMightBeImplicit()) { |
| 4892 | Label call_as_function; |
| 4893 | __ LoadRoot(at, Heap::kTheHoleValueRootIndex); |
| 4894 | __ Branch(&call_as_function, eq, t0, Operand(at)); |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 4895 | __ InvokeFunction(a1, |
| 4896 | actual, |
| 4897 | JUMP_FUNCTION, |
| 4898 | NullCallWrapper(), |
| 4899 | CALL_AS_METHOD); |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 4900 | __ bind(&call_as_function); |
| 4901 | } |
| 4902 | __ InvokeFunction(a1, |
| 4903 | actual, |
| 4904 | JUMP_FUNCTION, |
| 4905 | NullCallWrapper(), |
| 4906 | CALL_AS_FUNCTION); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4907 | |
| 4908 | // Slow-case: Non-function called. |
| 4909 | __ bind(&slow); |
| 4910 | // CALL_NON_FUNCTION expects the non-function callee as receiver (instead |
| 4911 | // of the original receiver from the call site). |
| 4912 | __ sw(a1, MemOperand(sp, argc_ * kPointerSize)); |
| 4913 | __ li(a0, Operand(argc_)); // Setup the number of arguments. |
| 4914 | __ mov(a2, zero_reg); |
| 4915 | __ GetBuiltinEntry(a3, Builtins::CALL_NON_FUNCTION); |
rossberg@chromium.org | 717967f | 2011-07-20 13:44:42 +0000 | [diff] [blame^] | 4916 | __ SetCallKind(t1, CALL_AS_METHOD); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4917 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 4918 | RelocInfo::CODE_TARGET); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4919 | } |
| 4920 | |
| 4921 | |
| 4922 | // Unfortunately you have to run without snapshots to see most of these |
| 4923 | // names in the profile since most compare stubs end up in the snapshot. |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 4924 | void CompareStub::PrintName(StringStream* stream) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4925 | ASSERT((lhs_.is(a0) && rhs_.is(a1)) || |
| 4926 | (lhs_.is(a1) && rhs_.is(a0))); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4927 | const char* cc_name; |
| 4928 | switch (cc_) { |
| 4929 | case lt: cc_name = "LT"; break; |
| 4930 | case gt: cc_name = "GT"; break; |
| 4931 | case le: cc_name = "LE"; break; |
| 4932 | case ge: cc_name = "GE"; break; |
| 4933 | case eq: cc_name = "EQ"; break; |
| 4934 | case ne: cc_name = "NE"; break; |
| 4935 | default: cc_name = "UnknownCondition"; break; |
| 4936 | } |
whesse@chromium.org | 030d38e | 2011-07-13 13:23:34 +0000 | [diff] [blame] | 4937 | bool is_equality = cc_ == eq || cc_ == ne; |
| 4938 | stream->Add("CompareStub_%s", cc_name); |
| 4939 | stream->Add(lhs_.is(a0) ? "_a0" : "_a1"); |
| 4940 | stream->Add(rhs_.is(a0) ? "_a0" : "_a1"); |
| 4941 | if (strict_ && is_equality) stream->Add("_STRICT"); |
| 4942 | if (never_nan_nan_ && is_equality) stream->Add("_NO_NAN"); |
| 4943 | if (!include_number_compare_) stream->Add("_NO_NUMBER"); |
| 4944 | if (!include_smi_compare_) stream->Add("_NO_SMI"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4945 | } |
| 4946 | |
| 4947 | |
| 4948 | int CompareStub::MinorKey() { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4949 | // Encode the two parameters in a unique 16 bit value. |
| 4950 | ASSERT(static_cast<unsigned>(cc_) < (1 << 14)); |
| 4951 | ASSERT((lhs_.is(a0) && rhs_.is(a1)) || |
| 4952 | (lhs_.is(a1) && rhs_.is(a0))); |
| 4953 | return ConditionField::encode(static_cast<unsigned>(cc_)) |
| 4954 | | RegisterField::encode(lhs_.is(a0)) |
| 4955 | | StrictField::encode(strict_) |
| 4956 | | NeverNanNanField::encode(cc_ == eq ? never_nan_nan_ : false) |
| 4957 | | IncludeSmiCompareField::encode(include_smi_compare_); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4958 | } |
| 4959 | |
| 4960 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 4961 | // StringCharCodeAtGenerator. |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 4962 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 4963 | Label flat_string; |
| 4964 | Label ascii_string; |
| 4965 | Label got_char_code; |
| 4966 | |
| 4967 | ASSERT(!t0.is(scratch_)); |
| 4968 | ASSERT(!t0.is(index_)); |
| 4969 | ASSERT(!t0.is(result_)); |
| 4970 | ASSERT(!t0.is(object_)); |
| 4971 | |
| 4972 | // If the receiver is a smi trigger the non-string case. |
| 4973 | __ JumpIfSmi(object_, receiver_not_string_); |
| 4974 | |
| 4975 | // Fetch the instance type of the receiver into result register. |
| 4976 | __ lw(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 4977 | __ lbu(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 4978 | // If the receiver is not a string trigger the non-string case. |
| 4979 | __ And(t0, result_, Operand(kIsNotStringMask)); |
| 4980 | __ Branch(receiver_not_string_, ne, t0, Operand(zero_reg)); |
| 4981 | |
| 4982 | // If the index is non-smi trigger the non-smi case. |
| 4983 | __ JumpIfNotSmi(index_, &index_not_smi_); |
| 4984 | |
| 4985 | // Put smi-tagged index into scratch register. |
| 4986 | __ mov(scratch_, index_); |
| 4987 | __ bind(&got_smi_index_); |
| 4988 | |
| 4989 | // Check for index out of range. |
| 4990 | __ lw(t0, FieldMemOperand(object_, String::kLengthOffset)); |
| 4991 | __ Branch(index_out_of_range_, ls, t0, Operand(scratch_)); |
| 4992 | |
| 4993 | // We need special handling for non-flat strings. |
| 4994 | STATIC_ASSERT(kSeqStringTag == 0); |
| 4995 | __ And(t0, result_, Operand(kStringRepresentationMask)); |
| 4996 | __ Branch(&flat_string, eq, t0, Operand(zero_reg)); |
| 4997 | |
| 4998 | // Handle non-flat strings. |
| 4999 | __ And(t0, result_, Operand(kIsConsStringMask)); |
| 5000 | __ Branch(&call_runtime_, eq, t0, Operand(zero_reg)); |
| 5001 | |
| 5002 | // ConsString. |
| 5003 | // Check whether the right hand side is the empty string (i.e. if |
| 5004 | // this is really a flat string in a cons string). If that is not |
| 5005 | // the case we would rather go to the runtime system now to flatten |
| 5006 | // the string. |
| 5007 | __ lw(result_, FieldMemOperand(object_, ConsString::kSecondOffset)); |
| 5008 | __ LoadRoot(t0, Heap::kEmptyStringRootIndex); |
| 5009 | __ Branch(&call_runtime_, ne, result_, Operand(t0)); |
| 5010 | |
| 5011 | // Get the first of the two strings and load its instance type. |
| 5012 | __ lw(object_, FieldMemOperand(object_, ConsString::kFirstOffset)); |
| 5013 | __ lw(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 5014 | __ lbu(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 5015 | // If the first cons component is also non-flat, then go to runtime. |
| 5016 | STATIC_ASSERT(kSeqStringTag == 0); |
| 5017 | |
| 5018 | __ And(t0, result_, Operand(kStringRepresentationMask)); |
| 5019 | __ Branch(&call_runtime_, ne, t0, Operand(zero_reg)); |
| 5020 | |
| 5021 | // Check for 1-byte or 2-byte string. |
| 5022 | __ bind(&flat_string); |
| 5023 | STATIC_ASSERT(kAsciiStringTag != 0); |
| 5024 | __ And(t0, result_, Operand(kStringEncodingMask)); |
| 5025 | __ Branch(&ascii_string, ne, t0, Operand(zero_reg)); |
| 5026 | |
| 5027 | // 2-byte string. |
| 5028 | // Load the 2-byte character code into the result register. We can |
| 5029 | // add without shifting since the smi tag size is the log2 of the |
| 5030 | // number of bytes in a two-byte character. |
| 5031 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize == 1 && kSmiShiftSize == 0); |
| 5032 | __ Addu(scratch_, object_, Operand(scratch_)); |
| 5033 | __ lhu(result_, FieldMemOperand(scratch_, SeqTwoByteString::kHeaderSize)); |
| 5034 | __ Branch(&got_char_code); |
| 5035 | |
| 5036 | // ASCII string. |
| 5037 | // Load the byte into the result register. |
| 5038 | __ bind(&ascii_string); |
| 5039 | |
| 5040 | __ srl(t0, scratch_, kSmiTagSize); |
| 5041 | __ Addu(scratch_, object_, t0); |
| 5042 | |
| 5043 | __ lbu(result_, FieldMemOperand(scratch_, SeqAsciiString::kHeaderSize)); |
| 5044 | |
| 5045 | __ bind(&got_char_code); |
| 5046 | __ sll(result_, result_, kSmiTagSize); |
| 5047 | __ bind(&exit_); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5048 | } |
| 5049 | |
| 5050 | |
| 5051 | void StringCharCodeAtGenerator::GenerateSlow( |
| 5052 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5053 | __ Abort("Unexpected fallthrough to CharCodeAt slow case"); |
| 5054 | |
| 5055 | // Index is not a smi. |
| 5056 | __ bind(&index_not_smi_); |
| 5057 | // If index is a heap number, try converting it to an integer. |
| 5058 | __ CheckMap(index_, |
| 5059 | scratch_, |
| 5060 | Heap::kHeapNumberMapRootIndex, |
| 5061 | index_not_number_, |
danno@chromium.org | 40cb878 | 2011-05-25 07:58:50 +0000 | [diff] [blame] | 5062 | DONT_DO_SMI_CHECK); |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5063 | call_helper.BeforeCall(masm); |
| 5064 | // Consumed by runtime conversion function: |
| 5065 | __ Push(object_, index_, index_); |
| 5066 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
| 5067 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero, 1); |
| 5068 | } else { |
| 5069 | ASSERT(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
| 5070 | // NumberToSmi discards numbers that are not exact integers. |
| 5071 | __ CallRuntime(Runtime::kNumberToSmi, 1); |
| 5072 | } |
| 5073 | |
| 5074 | // Save the conversion result before the pop instructions below |
| 5075 | // have a chance to overwrite it. |
| 5076 | |
| 5077 | __ Move(scratch_, v0); |
| 5078 | |
| 5079 | __ pop(index_); |
| 5080 | __ pop(object_); |
| 5081 | // Reload the instance type. |
| 5082 | __ lw(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 5083 | __ lbu(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 5084 | call_helper.AfterCall(masm); |
| 5085 | // If index is still not a smi, it must be out of range. |
| 5086 | __ JumpIfNotSmi(scratch_, index_out_of_range_); |
| 5087 | // Otherwise, return to the fast path. |
| 5088 | __ Branch(&got_smi_index_); |
| 5089 | |
| 5090 | // Call runtime. We get here when the receiver is a string and the |
| 5091 | // index is a number, but the code of getting the actual character |
| 5092 | // is too complex (e.g., when the string needs to be flattened). |
| 5093 | __ bind(&call_runtime_); |
| 5094 | call_helper.BeforeCall(masm); |
| 5095 | __ Push(object_, index_); |
| 5096 | __ CallRuntime(Runtime::kStringCharCodeAt, 2); |
| 5097 | |
| 5098 | __ Move(result_, v0); |
| 5099 | |
| 5100 | call_helper.AfterCall(masm); |
| 5101 | __ jmp(&exit_); |
| 5102 | |
| 5103 | __ Abort("Unexpected fallthrough from CharCodeAt slow case"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5104 | } |
| 5105 | |
| 5106 | |
| 5107 | // ------------------------------------------------------------------------- |
| 5108 | // StringCharFromCodeGenerator |
| 5109 | |
| 5110 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5111 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 5112 | |
| 5113 | ASSERT(!t0.is(result_)); |
| 5114 | ASSERT(!t0.is(code_)); |
| 5115 | |
| 5116 | STATIC_ASSERT(kSmiTag == 0); |
| 5117 | STATIC_ASSERT(kSmiShiftSize == 0); |
| 5118 | ASSERT(IsPowerOf2(String::kMaxAsciiCharCode + 1)); |
| 5119 | __ And(t0, |
| 5120 | code_, |
| 5121 | Operand(kSmiTagMask | |
| 5122 | ((~String::kMaxAsciiCharCode) << kSmiTagSize))); |
| 5123 | __ Branch(&slow_case_, ne, t0, Operand(zero_reg)); |
| 5124 | |
| 5125 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| 5126 | // At this point code register contains smi tagged ASCII char code. |
| 5127 | STATIC_ASSERT(kSmiTag == 0); |
| 5128 | __ sll(t0, code_, kPointerSizeLog2 - kSmiTagSize); |
| 5129 | __ Addu(result_, result_, t0); |
| 5130 | __ lw(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
| 5131 | __ LoadRoot(t0, Heap::kUndefinedValueRootIndex); |
| 5132 | __ Branch(&slow_case_, eq, result_, Operand(t0)); |
| 5133 | __ bind(&exit_); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5134 | } |
| 5135 | |
| 5136 | |
| 5137 | void StringCharFromCodeGenerator::GenerateSlow( |
| 5138 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5139 | __ Abort("Unexpected fallthrough to CharFromCode slow case"); |
| 5140 | |
| 5141 | __ bind(&slow_case_); |
| 5142 | call_helper.BeforeCall(masm); |
| 5143 | __ push(code_); |
| 5144 | __ CallRuntime(Runtime::kCharFromCode, 1); |
| 5145 | __ Move(result_, v0); |
| 5146 | |
| 5147 | call_helper.AfterCall(masm); |
| 5148 | __ Branch(&exit_); |
| 5149 | |
| 5150 | __ Abort("Unexpected fallthrough from CharFromCode slow case"); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5151 | } |
| 5152 | |
| 5153 | |
| 5154 | // ------------------------------------------------------------------------- |
| 5155 | // StringCharAtGenerator |
| 5156 | |
| 5157 | void StringCharAtGenerator::GenerateFast(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5158 | char_code_at_generator_.GenerateFast(masm); |
| 5159 | char_from_code_generator_.GenerateFast(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5160 | } |
| 5161 | |
| 5162 | |
| 5163 | void StringCharAtGenerator::GenerateSlow( |
| 5164 | MacroAssembler* masm, const RuntimeCallHelper& call_helper) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5165 | char_code_at_generator_.GenerateSlow(masm, call_helper); |
| 5166 | char_from_code_generator_.GenerateSlow(masm, call_helper); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5167 | } |
| 5168 | |
| 5169 | |
| 5170 | class StringHelper : public AllStatic { |
| 5171 | public: |
| 5172 | // Generate code for copying characters using a simple loop. This should only |
| 5173 | // be used in places where the number of characters is small and the |
| 5174 | // additional setup and checking in GenerateCopyCharactersLong adds too much |
| 5175 | // overhead. Copying of overlapping regions is not supported. |
| 5176 | // Dest register ends at the position after the last character written. |
| 5177 | static void GenerateCopyCharacters(MacroAssembler* masm, |
| 5178 | Register dest, |
| 5179 | Register src, |
| 5180 | Register count, |
| 5181 | Register scratch, |
| 5182 | bool ascii); |
| 5183 | |
| 5184 | // Generate code for copying a large number of characters. This function |
| 5185 | // is allowed to spend extra time setting up conditions to make copying |
| 5186 | // faster. Copying of overlapping regions is not supported. |
| 5187 | // Dest register ends at the position after the last character written. |
| 5188 | static void GenerateCopyCharactersLong(MacroAssembler* masm, |
| 5189 | Register dest, |
| 5190 | Register src, |
| 5191 | Register count, |
| 5192 | Register scratch1, |
| 5193 | Register scratch2, |
| 5194 | Register scratch3, |
| 5195 | Register scratch4, |
| 5196 | Register scratch5, |
| 5197 | int flags); |
| 5198 | |
| 5199 | |
| 5200 | // Probe the symbol table for a two character string. If the string is |
| 5201 | // not found by probing a jump to the label not_found is performed. This jump |
| 5202 | // does not guarantee that the string is not in the symbol table. If the |
| 5203 | // string is found the code falls through with the string in register r0. |
| 5204 | // Contents of both c1 and c2 registers are modified. At the exit c1 is |
| 5205 | // guaranteed to contain halfword with low and high bytes equal to |
| 5206 | // initial contents of c1 and c2 respectively. |
| 5207 | static void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 5208 | Register c1, |
| 5209 | Register c2, |
| 5210 | Register scratch1, |
| 5211 | Register scratch2, |
| 5212 | Register scratch3, |
| 5213 | Register scratch4, |
| 5214 | Register scratch5, |
| 5215 | Label* not_found); |
| 5216 | |
| 5217 | // Generate string hash. |
| 5218 | static void GenerateHashInit(MacroAssembler* masm, |
| 5219 | Register hash, |
| 5220 | Register character); |
| 5221 | |
| 5222 | static void GenerateHashAddCharacter(MacroAssembler* masm, |
| 5223 | Register hash, |
| 5224 | Register character); |
| 5225 | |
| 5226 | static void GenerateHashGetHash(MacroAssembler* masm, |
| 5227 | Register hash); |
| 5228 | |
| 5229 | private: |
| 5230 | DISALLOW_IMPLICIT_CONSTRUCTORS(StringHelper); |
| 5231 | }; |
| 5232 | |
| 5233 | |
| 5234 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 5235 | Register dest, |
| 5236 | Register src, |
| 5237 | Register count, |
| 5238 | Register scratch, |
| 5239 | bool ascii) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5240 | Label loop; |
| 5241 | Label done; |
| 5242 | // This loop just copies one character at a time, as it is only used for |
| 5243 | // very short strings. |
| 5244 | if (!ascii) { |
| 5245 | __ addu(count, count, count); |
| 5246 | } |
| 5247 | __ Branch(&done, eq, count, Operand(zero_reg)); |
| 5248 | __ addu(count, dest, count); // Count now points to the last dest byte. |
| 5249 | |
| 5250 | __ bind(&loop); |
| 5251 | __ lbu(scratch, MemOperand(src)); |
| 5252 | __ addiu(src, src, 1); |
| 5253 | __ sb(scratch, MemOperand(dest)); |
| 5254 | __ addiu(dest, dest, 1); |
| 5255 | __ Branch(&loop, lt, dest, Operand(count)); |
| 5256 | |
| 5257 | __ bind(&done); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5258 | } |
| 5259 | |
| 5260 | |
| 5261 | enum CopyCharactersFlags { |
| 5262 | COPY_ASCII = 1, |
| 5263 | DEST_ALWAYS_ALIGNED = 2 |
| 5264 | }; |
| 5265 | |
| 5266 | |
| 5267 | void StringHelper::GenerateCopyCharactersLong(MacroAssembler* masm, |
| 5268 | Register dest, |
| 5269 | Register src, |
| 5270 | Register count, |
| 5271 | Register scratch1, |
| 5272 | Register scratch2, |
| 5273 | Register scratch3, |
| 5274 | Register scratch4, |
| 5275 | Register scratch5, |
| 5276 | int flags) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5277 | bool ascii = (flags & COPY_ASCII) != 0; |
| 5278 | bool dest_always_aligned = (flags & DEST_ALWAYS_ALIGNED) != 0; |
| 5279 | |
| 5280 | if (dest_always_aligned && FLAG_debug_code) { |
| 5281 | // Check that destination is actually word aligned if the flag says |
| 5282 | // that it is. |
| 5283 | __ And(scratch4, dest, Operand(kPointerAlignmentMask)); |
| 5284 | __ Check(eq, |
| 5285 | "Destination of copy not aligned.", |
| 5286 | scratch4, |
| 5287 | Operand(zero_reg)); |
| 5288 | } |
| 5289 | |
| 5290 | const int kReadAlignment = 4; |
| 5291 | const int kReadAlignmentMask = kReadAlignment - 1; |
| 5292 | // Ensure that reading an entire aligned word containing the last character |
| 5293 | // of a string will not read outside the allocated area (because we pad up |
| 5294 | // to kObjectAlignment). |
| 5295 | STATIC_ASSERT(kObjectAlignment >= kReadAlignment); |
| 5296 | // Assumes word reads and writes are little endian. |
| 5297 | // Nothing to do for zero characters. |
| 5298 | Label done; |
| 5299 | |
| 5300 | if (!ascii) { |
| 5301 | __ addu(count, count, count); |
| 5302 | } |
| 5303 | __ Branch(&done, eq, count, Operand(zero_reg)); |
| 5304 | |
| 5305 | Label byte_loop; |
| 5306 | // Must copy at least eight bytes, otherwise just do it one byte at a time. |
| 5307 | __ Subu(scratch1, count, Operand(8)); |
| 5308 | __ Addu(count, dest, Operand(count)); |
| 5309 | Register limit = count; // Read until src equals this. |
| 5310 | __ Branch(&byte_loop, lt, scratch1, Operand(zero_reg)); |
| 5311 | |
| 5312 | if (!dest_always_aligned) { |
| 5313 | // Align dest by byte copying. Copies between zero and three bytes. |
| 5314 | __ And(scratch4, dest, Operand(kReadAlignmentMask)); |
| 5315 | Label dest_aligned; |
| 5316 | __ Branch(&dest_aligned, eq, scratch4, Operand(zero_reg)); |
| 5317 | Label aligned_loop; |
| 5318 | __ bind(&aligned_loop); |
| 5319 | __ lbu(scratch1, MemOperand(src)); |
| 5320 | __ addiu(src, src, 1); |
| 5321 | __ sb(scratch1, MemOperand(dest)); |
| 5322 | __ addiu(dest, dest, 1); |
| 5323 | __ addiu(scratch4, scratch4, 1); |
| 5324 | __ Branch(&aligned_loop, le, scratch4, Operand(kReadAlignmentMask)); |
| 5325 | __ bind(&dest_aligned); |
| 5326 | } |
| 5327 | |
| 5328 | Label simple_loop; |
| 5329 | |
| 5330 | __ And(scratch4, src, Operand(kReadAlignmentMask)); |
| 5331 | __ Branch(&simple_loop, eq, scratch4, Operand(zero_reg)); |
| 5332 | |
| 5333 | // Loop for src/dst that are not aligned the same way. |
| 5334 | // This loop uses lwl and lwr instructions. These instructions |
| 5335 | // depend on the endianness, and the implementation assumes little-endian. |
| 5336 | { |
| 5337 | Label loop; |
| 5338 | __ bind(&loop); |
| 5339 | __ lwr(scratch1, MemOperand(src)); |
| 5340 | __ Addu(src, src, Operand(kReadAlignment)); |
| 5341 | __ lwl(scratch1, MemOperand(src, -1)); |
| 5342 | __ sw(scratch1, MemOperand(dest)); |
| 5343 | __ Addu(dest, dest, Operand(kReadAlignment)); |
| 5344 | __ Subu(scratch2, limit, dest); |
| 5345 | __ Branch(&loop, ge, scratch2, Operand(kReadAlignment)); |
| 5346 | } |
| 5347 | |
| 5348 | __ Branch(&byte_loop); |
| 5349 | |
| 5350 | // Simple loop. |
| 5351 | // Copy words from src to dest, until less than four bytes left. |
| 5352 | // Both src and dest are word aligned. |
| 5353 | __ bind(&simple_loop); |
| 5354 | { |
| 5355 | Label loop; |
| 5356 | __ bind(&loop); |
| 5357 | __ lw(scratch1, MemOperand(src)); |
| 5358 | __ Addu(src, src, Operand(kReadAlignment)); |
| 5359 | __ sw(scratch1, MemOperand(dest)); |
| 5360 | __ Addu(dest, dest, Operand(kReadAlignment)); |
| 5361 | __ Subu(scratch2, limit, dest); |
| 5362 | __ Branch(&loop, ge, scratch2, Operand(kReadAlignment)); |
| 5363 | } |
| 5364 | |
| 5365 | // Copy bytes from src to dest until dest hits limit. |
| 5366 | __ bind(&byte_loop); |
| 5367 | // Test if dest has already reached the limit. |
| 5368 | __ Branch(&done, ge, dest, Operand(limit)); |
| 5369 | __ lbu(scratch1, MemOperand(src)); |
| 5370 | __ addiu(src, src, 1); |
| 5371 | __ sb(scratch1, MemOperand(dest)); |
| 5372 | __ addiu(dest, dest, 1); |
| 5373 | __ Branch(&byte_loop); |
| 5374 | |
| 5375 | __ bind(&done); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5376 | } |
| 5377 | |
| 5378 | |
| 5379 | void StringHelper::GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm, |
| 5380 | Register c1, |
| 5381 | Register c2, |
| 5382 | Register scratch1, |
| 5383 | Register scratch2, |
| 5384 | Register scratch3, |
| 5385 | Register scratch4, |
| 5386 | Register scratch5, |
| 5387 | Label* not_found) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5388 | // Register scratch3 is the general scratch register in this function. |
| 5389 | Register scratch = scratch3; |
| 5390 | |
| 5391 | // Make sure that both characters are not digits as such strings has a |
| 5392 | // different hash algorithm. Don't try to look for these in the symbol table. |
| 5393 | Label not_array_index; |
| 5394 | __ Subu(scratch, c1, Operand(static_cast<int>('0'))); |
| 5395 | __ Branch(¬_array_index, |
| 5396 | Ugreater, |
| 5397 | scratch, |
| 5398 | Operand(static_cast<int>('9' - '0'))); |
| 5399 | __ Subu(scratch, c2, Operand(static_cast<int>('0'))); |
| 5400 | |
| 5401 | // If check failed combine both characters into single halfword. |
| 5402 | // This is required by the contract of the method: code at the |
| 5403 | // not_found branch expects this combination in c1 register. |
| 5404 | Label tmp; |
| 5405 | __ sll(scratch1, c2, kBitsPerByte); |
| 5406 | __ Branch(&tmp, Ugreater, scratch, Operand(static_cast<int>('9' - '0'))); |
| 5407 | __ Or(c1, c1, scratch1); |
| 5408 | __ bind(&tmp); |
| 5409 | __ Branch(not_found, |
| 5410 | Uless_equal, |
| 5411 | scratch, |
| 5412 | Operand(static_cast<int>('9' - '0'))); |
| 5413 | |
| 5414 | __ bind(¬_array_index); |
| 5415 | // Calculate the two character string hash. |
| 5416 | Register hash = scratch1; |
| 5417 | StringHelper::GenerateHashInit(masm, hash, c1); |
| 5418 | StringHelper::GenerateHashAddCharacter(masm, hash, c2); |
| 5419 | StringHelper::GenerateHashGetHash(masm, hash); |
| 5420 | |
| 5421 | // Collect the two characters in a register. |
| 5422 | Register chars = c1; |
| 5423 | __ sll(scratch, c2, kBitsPerByte); |
| 5424 | __ Or(chars, chars, scratch); |
| 5425 | |
| 5426 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5427 | // hash: hash of two character string. |
| 5428 | |
| 5429 | // Load symbol table. |
| 5430 | // Load address of first element of the symbol table. |
| 5431 | Register symbol_table = c2; |
| 5432 | __ LoadRoot(symbol_table, Heap::kSymbolTableRootIndex); |
| 5433 | |
| 5434 | Register undefined = scratch4; |
| 5435 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 5436 | |
| 5437 | // Calculate capacity mask from the symbol table capacity. |
| 5438 | Register mask = scratch2; |
| 5439 | __ lw(mask, FieldMemOperand(symbol_table, SymbolTable::kCapacityOffset)); |
| 5440 | __ sra(mask, mask, 1); |
| 5441 | __ Addu(mask, mask, -1); |
| 5442 | |
| 5443 | // Calculate untagged address of the first element of the symbol table. |
| 5444 | Register first_symbol_table_element = symbol_table; |
| 5445 | __ Addu(first_symbol_table_element, symbol_table, |
| 5446 | Operand(SymbolTable::kElementsStartOffset - kHeapObjectTag)); |
| 5447 | |
| 5448 | // Registers. |
| 5449 | // chars: two character string, char 1 in byte 0 and char 2 in byte 1. |
| 5450 | // hash: hash of two character string |
| 5451 | // mask: capacity mask |
| 5452 | // first_symbol_table_element: address of the first element of |
| 5453 | // the symbol table |
| 5454 | // undefined: the undefined object |
| 5455 | // scratch: - |
| 5456 | |
| 5457 | // Perform a number of probes in the symbol table. |
| 5458 | static const int kProbes = 4; |
| 5459 | Label found_in_symbol_table; |
| 5460 | Label next_probe[kProbes]; |
| 5461 | Register candidate = scratch5; // Scratch register contains candidate. |
| 5462 | for (int i = 0; i < kProbes; i++) { |
| 5463 | // Calculate entry in symbol table. |
| 5464 | if (i > 0) { |
| 5465 | __ Addu(candidate, hash, Operand(SymbolTable::GetProbeOffset(i))); |
| 5466 | } else { |
| 5467 | __ mov(candidate, hash); |
| 5468 | } |
| 5469 | |
| 5470 | __ And(candidate, candidate, Operand(mask)); |
| 5471 | |
| 5472 | // Load the entry from the symble table. |
| 5473 | STATIC_ASSERT(SymbolTable::kEntrySize == 1); |
| 5474 | __ sll(scratch, candidate, kPointerSizeLog2); |
| 5475 | __ Addu(scratch, scratch, first_symbol_table_element); |
| 5476 | __ lw(candidate, MemOperand(scratch)); |
| 5477 | |
| 5478 | // If entry is undefined no string with this hash can be found. |
| 5479 | Label is_string; |
| 5480 | __ GetObjectType(candidate, scratch, scratch); |
| 5481 | __ Branch(&is_string, ne, scratch, Operand(ODDBALL_TYPE)); |
| 5482 | |
| 5483 | __ Branch(not_found, eq, undefined, Operand(candidate)); |
| 5484 | // Must be null (deleted entry). |
| 5485 | if (FLAG_debug_code) { |
| 5486 | __ LoadRoot(scratch, Heap::kNullValueRootIndex); |
| 5487 | __ Assert(eq, "oddball in symbol table is not undefined or null", |
| 5488 | scratch, Operand(candidate)); |
| 5489 | } |
| 5490 | __ jmp(&next_probe[i]); |
| 5491 | |
| 5492 | __ bind(&is_string); |
| 5493 | |
| 5494 | // Check that the candidate is a non-external ASCII string. The instance |
| 5495 | // type is still in the scratch register from the CompareObjectType |
| 5496 | // operation. |
| 5497 | __ JumpIfInstanceTypeIsNotSequentialAscii(scratch, scratch, &next_probe[i]); |
| 5498 | |
| 5499 | // If length is not 2 the string is not a candidate. |
| 5500 | __ lw(scratch, FieldMemOperand(candidate, String::kLengthOffset)); |
| 5501 | __ Branch(&next_probe[i], ne, scratch, Operand(Smi::FromInt(2))); |
| 5502 | |
| 5503 | // Check if the two characters match. |
| 5504 | // Assumes that word load is little endian. |
| 5505 | __ lhu(scratch, FieldMemOperand(candidate, SeqAsciiString::kHeaderSize)); |
| 5506 | __ Branch(&found_in_symbol_table, eq, chars, Operand(scratch)); |
| 5507 | __ bind(&next_probe[i]); |
| 5508 | } |
| 5509 | |
| 5510 | // No matching 2 character string found by probing. |
| 5511 | __ jmp(not_found); |
| 5512 | |
| 5513 | // Scratch register contains result when we fall through to here. |
| 5514 | Register result = candidate; |
| 5515 | __ bind(&found_in_symbol_table); |
| 5516 | __ mov(v0, result); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5517 | } |
| 5518 | |
| 5519 | |
| 5520 | void StringHelper::GenerateHashInit(MacroAssembler* masm, |
| 5521 | Register hash, |
| 5522 | Register character) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5523 | // hash = character + (character << 10); |
| 5524 | __ sll(hash, character, 10); |
| 5525 | __ addu(hash, hash, character); |
| 5526 | // hash ^= hash >> 6; |
| 5527 | __ sra(at, hash, 6); |
| 5528 | __ xor_(hash, hash, at); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5529 | } |
| 5530 | |
| 5531 | |
| 5532 | void StringHelper::GenerateHashAddCharacter(MacroAssembler* masm, |
| 5533 | Register hash, |
| 5534 | Register character) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5535 | // hash += character; |
| 5536 | __ addu(hash, hash, character); |
| 5537 | // hash += hash << 10; |
| 5538 | __ sll(at, hash, 10); |
| 5539 | __ addu(hash, hash, at); |
| 5540 | // hash ^= hash >> 6; |
| 5541 | __ sra(at, hash, 6); |
| 5542 | __ xor_(hash, hash, at); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5543 | } |
| 5544 | |
| 5545 | |
| 5546 | void StringHelper::GenerateHashGetHash(MacroAssembler* masm, |
| 5547 | Register hash) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5548 | // hash += hash << 3; |
| 5549 | __ sll(at, hash, 3); |
| 5550 | __ addu(hash, hash, at); |
| 5551 | // hash ^= hash >> 11; |
| 5552 | __ sra(at, hash, 11); |
| 5553 | __ xor_(hash, hash, at); |
| 5554 | // hash += hash << 15; |
| 5555 | __ sll(at, hash, 15); |
| 5556 | __ addu(hash, hash, at); |
| 5557 | |
| 5558 | // if (hash == 0) hash = 27; |
| 5559 | __ ori(at, zero_reg, 27); |
| 5560 | __ movz(hash, at, hash); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5561 | } |
| 5562 | |
| 5563 | |
| 5564 | void SubStringStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5565 | Label sub_string_runtime; |
| 5566 | // Stack frame on entry. |
| 5567 | // ra: return address |
| 5568 | // sp[0]: to |
| 5569 | // sp[4]: from |
| 5570 | // sp[8]: string |
| 5571 | |
| 5572 | // This stub is called from the native-call %_SubString(...), so |
| 5573 | // nothing can be assumed about the arguments. It is tested that: |
| 5574 | // "string" is a sequential string, |
| 5575 | // both "from" and "to" are smis, and |
| 5576 | // 0 <= from <= to <= string.length. |
| 5577 | // If any of these assumptions fail, we call the runtime system. |
| 5578 | |
| 5579 | static const int kToOffset = 0 * kPointerSize; |
| 5580 | static const int kFromOffset = 1 * kPointerSize; |
| 5581 | static const int kStringOffset = 2 * kPointerSize; |
| 5582 | |
| 5583 | Register to = t2; |
| 5584 | Register from = t3; |
| 5585 | |
| 5586 | // Check bounds and smi-ness. |
| 5587 | __ lw(to, MemOperand(sp, kToOffset)); |
| 5588 | __ lw(from, MemOperand(sp, kFromOffset)); |
| 5589 | STATIC_ASSERT(kFromOffset == kToOffset + 4); |
| 5590 | STATIC_ASSERT(kSmiTag == 0); |
| 5591 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 5592 | |
| 5593 | __ JumpIfNotSmi(from, &sub_string_runtime); |
| 5594 | __ JumpIfNotSmi(to, &sub_string_runtime); |
| 5595 | |
| 5596 | __ sra(a3, from, kSmiTagSize); // Remove smi tag. |
| 5597 | __ sra(t5, to, kSmiTagSize); // Remove smi tag. |
| 5598 | |
| 5599 | // a3: from index (untagged smi) |
| 5600 | // t5: to index (untagged smi) |
| 5601 | |
| 5602 | __ Branch(&sub_string_runtime, lt, a3, Operand(zero_reg)); // From < 0. |
| 5603 | |
| 5604 | __ subu(a2, t5, a3); |
| 5605 | __ Branch(&sub_string_runtime, gt, a3, Operand(t5)); // Fail if from > to. |
| 5606 | |
| 5607 | // Special handling of sub-strings of length 1 and 2. One character strings |
| 5608 | // are handled in the runtime system (looked up in the single character |
| 5609 | // cache). Two character strings are looked for in the symbol cache. |
| 5610 | __ Branch(&sub_string_runtime, lt, a2, Operand(2)); |
| 5611 | |
| 5612 | // Both to and from are smis. |
| 5613 | |
| 5614 | // a2: result string length |
| 5615 | // a3: from index (untagged smi) |
| 5616 | // t2: (a.k.a. to): to (smi) |
| 5617 | // t3: (a.k.a. from): from offset (smi) |
| 5618 | // t5: to index (untagged smi) |
| 5619 | |
| 5620 | // Make sure first argument is a sequential (or flat) string. |
| 5621 | __ lw(t1, MemOperand(sp, kStringOffset)); |
| 5622 | __ Branch(&sub_string_runtime, eq, t1, Operand(kSmiTagMask)); |
| 5623 | |
| 5624 | __ lw(a1, FieldMemOperand(t1, HeapObject::kMapOffset)); |
| 5625 | __ lbu(a1, FieldMemOperand(a1, Map::kInstanceTypeOffset)); |
| 5626 | __ And(t4, a1, Operand(kIsNotStringMask)); |
| 5627 | |
| 5628 | __ Branch(&sub_string_runtime, ne, t4, Operand(zero_reg)); |
| 5629 | |
| 5630 | // a1: instance type |
| 5631 | // a2: result string length |
| 5632 | // a3: from index (untagged smi) |
| 5633 | // t1: string |
| 5634 | // t2: (a.k.a. to): to (smi) |
| 5635 | // t3: (a.k.a. from): from offset (smi) |
| 5636 | // t5: to index (untagged smi) |
| 5637 | |
| 5638 | Label seq_string; |
| 5639 | __ And(t0, a1, Operand(kStringRepresentationMask)); |
| 5640 | STATIC_ASSERT(kSeqStringTag < kConsStringTag); |
| 5641 | STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| 5642 | |
| 5643 | // External strings go to runtime. |
| 5644 | __ Branch(&sub_string_runtime, gt, t0, Operand(kConsStringTag)); |
| 5645 | |
| 5646 | // Sequential strings are handled directly. |
| 5647 | __ Branch(&seq_string, lt, t0, Operand(kConsStringTag)); |
| 5648 | |
| 5649 | // Cons string. Try to recurse (once) on the first substring. |
| 5650 | // (This adds a little more generality than necessary to handle flattened |
| 5651 | // cons strings, but not much). |
| 5652 | __ lw(t1, FieldMemOperand(t1, ConsString::kFirstOffset)); |
| 5653 | __ lw(t0, FieldMemOperand(t1, HeapObject::kMapOffset)); |
| 5654 | __ lbu(a1, FieldMemOperand(t0, Map::kInstanceTypeOffset)); |
| 5655 | STATIC_ASSERT(kSeqStringTag == 0); |
| 5656 | // Cons and External strings go to runtime. |
| 5657 | __ Branch(&sub_string_runtime, ne, a1, Operand(kStringRepresentationMask)); |
| 5658 | |
| 5659 | // Definitly a sequential string. |
| 5660 | __ bind(&seq_string); |
| 5661 | |
| 5662 | // a1: instance type |
| 5663 | // a2: result string length |
| 5664 | // a3: from index (untagged smi) |
| 5665 | // t1: string |
| 5666 | // t2: (a.k.a. to): to (smi) |
| 5667 | // t3: (a.k.a. from): from offset (smi) |
| 5668 | // t5: to index (untagged smi) |
| 5669 | |
| 5670 | __ lw(t0, FieldMemOperand(t1, String::kLengthOffset)); |
| 5671 | __ Branch(&sub_string_runtime, lt, t0, Operand(to)); // Fail if to > length. |
| 5672 | to = no_reg; |
| 5673 | |
| 5674 | // a1: instance type |
| 5675 | // a2: result string length |
| 5676 | // a3: from index (untagged smi) |
| 5677 | // t1: string |
| 5678 | // t3: (a.k.a. from): from offset (smi) |
| 5679 | // t5: to index (untagged smi) |
| 5680 | |
| 5681 | // Check for flat ASCII string. |
| 5682 | Label non_ascii_flat; |
| 5683 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 5684 | |
| 5685 | __ And(t4, a1, Operand(kStringEncodingMask)); |
| 5686 | __ Branch(&non_ascii_flat, eq, t4, Operand(zero_reg)); |
| 5687 | |
| 5688 | Label result_longer_than_two; |
| 5689 | __ Branch(&result_longer_than_two, gt, a2, Operand(2)); |
| 5690 | |
| 5691 | // Sub string of length 2 requested. |
| 5692 | // Get the two characters forming the sub string. |
| 5693 | __ Addu(t1, t1, Operand(a3)); |
| 5694 | __ lbu(a3, FieldMemOperand(t1, SeqAsciiString::kHeaderSize)); |
| 5695 | __ lbu(t0, FieldMemOperand(t1, SeqAsciiString::kHeaderSize + 1)); |
| 5696 | |
| 5697 | // Try to lookup two character string in symbol table. |
| 5698 | Label make_two_character_string; |
| 5699 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 5700 | masm, a3, t0, a1, t1, t2, t3, t4, &make_two_character_string); |
| 5701 | Counters* counters = masm->isolate()->counters(); |
| 5702 | __ IncrementCounter(counters->sub_string_native(), 1, a3, t0); |
| 5703 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 5704 | __ Ret(); |
| 5705 | |
| 5706 | |
| 5707 | // a2: result string length. |
| 5708 | // a3: two characters combined into halfword in little endian byte order. |
| 5709 | __ bind(&make_two_character_string); |
| 5710 | __ AllocateAsciiString(v0, a2, t0, t1, t4, &sub_string_runtime); |
| 5711 | __ sh(a3, FieldMemOperand(v0, SeqAsciiString::kHeaderSize)); |
| 5712 | __ IncrementCounter(counters->sub_string_native(), 1, a3, t0); |
| 5713 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 5714 | __ Ret(); |
| 5715 | |
| 5716 | __ bind(&result_longer_than_two); |
| 5717 | |
| 5718 | // Allocate the result. |
| 5719 | __ AllocateAsciiString(v0, a2, t4, t0, a1, &sub_string_runtime); |
| 5720 | |
| 5721 | // v0: result string. |
| 5722 | // a2: result string length. |
| 5723 | // a3: from index (untagged smi) |
| 5724 | // t1: string. |
| 5725 | // t3: (a.k.a. from): from offset (smi) |
| 5726 | // Locate first character of result. |
| 5727 | __ Addu(a1, v0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5728 | // Locate 'from' character of string. |
| 5729 | __ Addu(t1, t1, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5730 | __ Addu(t1, t1, Operand(a3)); |
| 5731 | |
| 5732 | // v0: result string. |
| 5733 | // a1: first character of result string. |
| 5734 | // a2: result string length. |
| 5735 | // t1: first character of sub string to copy. |
| 5736 | STATIC_ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 5737 | StringHelper::GenerateCopyCharactersLong( |
| 5738 | masm, a1, t1, a2, a3, t0, t2, t3, t4, COPY_ASCII | DEST_ALWAYS_ALIGNED); |
| 5739 | __ IncrementCounter(counters->sub_string_native(), 1, a3, t0); |
| 5740 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 5741 | __ Ret(); |
| 5742 | |
| 5743 | __ bind(&non_ascii_flat); |
| 5744 | // a2: result string length. |
| 5745 | // t1: string. |
| 5746 | // t3: (a.k.a. from): from offset (smi) |
| 5747 | // Check for flat two byte string. |
| 5748 | |
| 5749 | // Allocate the result. |
| 5750 | __ AllocateTwoByteString(v0, a2, a1, a3, t0, &sub_string_runtime); |
| 5751 | |
| 5752 | // v0: result string. |
| 5753 | // a2: result string length. |
| 5754 | // t1: string. |
| 5755 | // Locate first character of result. |
| 5756 | __ Addu(a1, v0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5757 | // Locate 'from' character of string. |
| 5758 | __ Addu(t1, t1, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 5759 | // As "from" is a smi it is 2 times the value which matches the size of a two |
| 5760 | // byte character. |
| 5761 | __ Addu(t1, t1, Operand(from)); |
| 5762 | from = no_reg; |
| 5763 | |
| 5764 | // v0: result string. |
| 5765 | // a1: first character of result. |
| 5766 | // a2: result length. |
| 5767 | // t1: first character of string to copy. |
| 5768 | STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 5769 | StringHelper::GenerateCopyCharactersLong( |
| 5770 | masm, a1, t1, a2, a3, t0, t2, t3, t4, DEST_ALWAYS_ALIGNED); |
| 5771 | __ IncrementCounter(counters->sub_string_native(), 1, a3, t0); |
| 5772 | __ Addu(sp, sp, Operand(3 * kPointerSize)); |
| 5773 | __ Ret(); |
| 5774 | |
| 5775 | // Just jump to runtime to create the sub string. |
| 5776 | __ bind(&sub_string_runtime); |
| 5777 | __ TailCallRuntime(Runtime::kSubString, 3, 1); |
| 5778 | } |
| 5779 | |
| 5780 | |
| 5781 | void StringCompareStub::GenerateFlatAsciiStringEquals(MacroAssembler* masm, |
| 5782 | Register left, |
| 5783 | Register right, |
| 5784 | Register scratch1, |
| 5785 | Register scratch2, |
| 5786 | Register scratch3) { |
| 5787 | Register length = scratch1; |
| 5788 | |
| 5789 | // Compare lengths. |
| 5790 | Label strings_not_equal, check_zero_length; |
| 5791 | __ lw(length, FieldMemOperand(left, String::kLengthOffset)); |
| 5792 | __ lw(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 5793 | __ Branch(&check_zero_length, eq, length, Operand(scratch2)); |
| 5794 | __ bind(&strings_not_equal); |
| 5795 | __ li(v0, Operand(Smi::FromInt(NOT_EQUAL))); |
| 5796 | __ Ret(); |
| 5797 | |
| 5798 | // Check if the length is zero. |
| 5799 | Label compare_chars; |
| 5800 | __ bind(&check_zero_length); |
| 5801 | STATIC_ASSERT(kSmiTag == 0); |
| 5802 | __ Branch(&compare_chars, ne, length, Operand(zero_reg)); |
| 5803 | __ li(v0, Operand(Smi::FromInt(EQUAL))); |
| 5804 | __ Ret(); |
| 5805 | |
| 5806 | // Compare characters. |
| 5807 | __ bind(&compare_chars); |
| 5808 | |
| 5809 | GenerateAsciiCharsCompareLoop(masm, |
| 5810 | left, right, length, scratch2, scratch3, v0, |
| 5811 | &strings_not_equal); |
| 5812 | |
| 5813 | // Characters are equal. |
| 5814 | __ li(v0, Operand(Smi::FromInt(EQUAL))); |
| 5815 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5816 | } |
| 5817 | |
| 5818 | |
| 5819 | void StringCompareStub::GenerateCompareFlatAsciiStrings(MacroAssembler* masm, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5820 | Register left, |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 5821 | Register right, |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5822 | Register scratch1, |
| 5823 | Register scratch2, |
| 5824 | Register scratch3, |
| 5825 | Register scratch4) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5826 | Label result_not_equal, compare_lengths; |
| 5827 | // Find minimum length and length difference. |
| 5828 | __ lw(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 5829 | __ lw(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 5830 | __ Subu(scratch3, scratch1, Operand(scratch2)); |
| 5831 | Register length_delta = scratch3; |
| 5832 | __ slt(scratch4, scratch2, scratch1); |
| 5833 | __ movn(scratch1, scratch2, scratch4); |
| 5834 | Register min_length = scratch1; |
| 5835 | STATIC_ASSERT(kSmiTag == 0); |
| 5836 | __ Branch(&compare_lengths, eq, min_length, Operand(zero_reg)); |
| 5837 | |
| 5838 | // Compare loop. |
| 5839 | GenerateAsciiCharsCompareLoop(masm, |
| 5840 | left, right, min_length, scratch2, scratch4, v0, |
| 5841 | &result_not_equal); |
| 5842 | |
| 5843 | // Compare lengths - strings up to min-length are equal. |
| 5844 | __ bind(&compare_lengths); |
| 5845 | ASSERT(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
| 5846 | // Use length_delta as result if it's zero. |
| 5847 | __ mov(scratch2, length_delta); |
| 5848 | __ mov(scratch4, zero_reg); |
| 5849 | __ mov(v0, zero_reg); |
| 5850 | |
| 5851 | __ bind(&result_not_equal); |
| 5852 | // Conditionally update the result based either on length_delta or |
| 5853 | // the last comparion performed in the loop above. |
| 5854 | Label ret; |
| 5855 | __ Branch(&ret, eq, scratch2, Operand(scratch4)); |
| 5856 | __ li(v0, Operand(Smi::FromInt(GREATER))); |
| 5857 | __ Branch(&ret, gt, scratch2, Operand(scratch4)); |
| 5858 | __ li(v0, Operand(Smi::FromInt(LESS))); |
| 5859 | __ bind(&ret); |
| 5860 | __ Ret(); |
| 5861 | } |
| 5862 | |
| 5863 | |
| 5864 | void StringCompareStub::GenerateAsciiCharsCompareLoop( |
| 5865 | MacroAssembler* masm, |
| 5866 | Register left, |
| 5867 | Register right, |
| 5868 | Register length, |
| 5869 | Register scratch1, |
| 5870 | Register scratch2, |
| 5871 | Register scratch3, |
| 5872 | Label* chars_not_equal) { |
| 5873 | // Change index to run from -length to -1 by adding length to string |
| 5874 | // start. This means that loop ends when index reaches zero, which |
| 5875 | // doesn't need an additional compare. |
| 5876 | __ SmiUntag(length); |
| 5877 | __ Addu(scratch1, length, |
| 5878 | Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 5879 | __ Addu(left, left, Operand(scratch1)); |
| 5880 | __ Addu(right, right, Operand(scratch1)); |
| 5881 | __ Subu(length, zero_reg, length); |
| 5882 | Register index = length; // index = -length; |
| 5883 | |
| 5884 | |
| 5885 | // Compare loop. |
| 5886 | Label loop; |
| 5887 | __ bind(&loop); |
| 5888 | __ Addu(scratch3, left, index); |
| 5889 | __ lbu(scratch1, MemOperand(scratch3)); |
| 5890 | __ Addu(scratch3, right, index); |
| 5891 | __ lbu(scratch2, MemOperand(scratch3)); |
| 5892 | __ Branch(chars_not_equal, ne, scratch1, Operand(scratch2)); |
| 5893 | __ Addu(index, index, 1); |
| 5894 | __ Branch(&loop, ne, index, Operand(zero_reg)); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5895 | } |
| 5896 | |
| 5897 | |
| 5898 | void StringCompareStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5899 | Label runtime; |
| 5900 | |
| 5901 | Counters* counters = masm->isolate()->counters(); |
| 5902 | |
| 5903 | // Stack frame on entry. |
| 5904 | // sp[0]: right string |
| 5905 | // sp[4]: left string |
| 5906 | __ lw(a1, MemOperand(sp, 1 * kPointerSize)); // Left. |
| 5907 | __ lw(a0, MemOperand(sp, 0 * kPointerSize)); // Right. |
| 5908 | |
| 5909 | Label not_same; |
| 5910 | __ Branch(¬_same, ne, a0, Operand(a1)); |
| 5911 | STATIC_ASSERT(EQUAL == 0); |
| 5912 | STATIC_ASSERT(kSmiTag == 0); |
| 5913 | __ li(v0, Operand(Smi::FromInt(EQUAL))); |
| 5914 | __ IncrementCounter(counters->string_compare_native(), 1, a1, a2); |
| 5915 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 5916 | __ Ret(); |
| 5917 | |
| 5918 | __ bind(¬_same); |
| 5919 | |
| 5920 | // Check that both objects are sequential ASCII strings. |
| 5921 | __ JumpIfNotBothSequentialAsciiStrings(a1, a0, a2, a3, &runtime); |
| 5922 | |
| 5923 | // Compare flat ASCII strings natively. Remove arguments from stack first. |
| 5924 | __ IncrementCounter(counters->string_compare_native(), 1, a2, a3); |
| 5925 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 5926 | GenerateCompareFlatAsciiStrings(masm, a1, a0, a2, a3, t0, t1); |
| 5927 | |
| 5928 | __ bind(&runtime); |
| 5929 | __ TailCallRuntime(Runtime::kStringCompare, 2, 1); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 5930 | } |
| 5931 | |
| 5932 | |
| 5933 | void StringAddStub::Generate(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 5934 | Label string_add_runtime, call_builtin; |
| 5935 | Builtins::JavaScript builtin_id = Builtins::ADD; |
| 5936 | |
| 5937 | Counters* counters = masm->isolate()->counters(); |
| 5938 | |
| 5939 | // Stack on entry: |
| 5940 | // sp[0]: second argument (right). |
| 5941 | // sp[4]: first argument (left). |
| 5942 | |
| 5943 | // Load the two arguments. |
| 5944 | __ lw(a0, MemOperand(sp, 1 * kPointerSize)); // First argument. |
| 5945 | __ lw(a1, MemOperand(sp, 0 * kPointerSize)); // Second argument. |
| 5946 | |
| 5947 | // Make sure that both arguments are strings if not known in advance. |
| 5948 | if (flags_ == NO_STRING_ADD_FLAGS) { |
| 5949 | __ JumpIfEitherSmi(a0, a1, &string_add_runtime); |
| 5950 | // Load instance types. |
| 5951 | __ lw(t0, FieldMemOperand(a0, HeapObject::kMapOffset)); |
| 5952 | __ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset)); |
| 5953 | __ lbu(t0, FieldMemOperand(t0, Map::kInstanceTypeOffset)); |
| 5954 | __ lbu(t1, FieldMemOperand(t1, Map::kInstanceTypeOffset)); |
| 5955 | STATIC_ASSERT(kStringTag == 0); |
| 5956 | // If either is not a string, go to runtime. |
| 5957 | __ Or(t4, t0, Operand(t1)); |
| 5958 | __ And(t4, t4, Operand(kIsNotStringMask)); |
| 5959 | __ Branch(&string_add_runtime, ne, t4, Operand(zero_reg)); |
| 5960 | } else { |
| 5961 | // Here at least one of the arguments is definitely a string. |
| 5962 | // We convert the one that is not known to be a string. |
| 5963 | if ((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) == 0) { |
| 5964 | ASSERT((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) != 0); |
| 5965 | GenerateConvertArgument( |
| 5966 | masm, 1 * kPointerSize, a0, a2, a3, t0, t1, &call_builtin); |
| 5967 | builtin_id = Builtins::STRING_ADD_RIGHT; |
| 5968 | } else if ((flags_ & NO_STRING_CHECK_RIGHT_IN_STUB) == 0) { |
| 5969 | ASSERT((flags_ & NO_STRING_CHECK_LEFT_IN_STUB) != 0); |
| 5970 | GenerateConvertArgument( |
| 5971 | masm, 0 * kPointerSize, a1, a2, a3, t0, t1, &call_builtin); |
| 5972 | builtin_id = Builtins::STRING_ADD_LEFT; |
| 5973 | } |
| 5974 | } |
| 5975 | |
| 5976 | // Both arguments are strings. |
| 5977 | // a0: first string |
| 5978 | // a1: second string |
| 5979 | // t0: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 5980 | // t1: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 5981 | { |
| 5982 | Label strings_not_empty; |
| 5983 | // Check if either of the strings are empty. In that case return the other. |
| 5984 | // These tests use zero-length check on string-length whch is an Smi. |
| 5985 | // Assert that Smi::FromInt(0) is really 0. |
| 5986 | STATIC_ASSERT(kSmiTag == 0); |
| 5987 | ASSERT(Smi::FromInt(0) == 0); |
| 5988 | __ lw(a2, FieldMemOperand(a0, String::kLengthOffset)); |
| 5989 | __ lw(a3, FieldMemOperand(a1, String::kLengthOffset)); |
| 5990 | __ mov(v0, a0); // Assume we'll return first string (from a0). |
| 5991 | __ movz(v0, a1, a2); // If first is empty, return second (from a1). |
| 5992 | __ slt(t4, zero_reg, a2); // if (a2 > 0) t4 = 1. |
| 5993 | __ slt(t5, zero_reg, a3); // if (a3 > 0) t5 = 1. |
| 5994 | __ and_(t4, t4, t5); // Branch if both strings were non-empty. |
| 5995 | __ Branch(&strings_not_empty, ne, t4, Operand(zero_reg)); |
| 5996 | |
| 5997 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 5998 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 5999 | __ Ret(); |
| 6000 | |
| 6001 | __ bind(&strings_not_empty); |
| 6002 | } |
| 6003 | |
| 6004 | // Untag both string-lengths. |
| 6005 | __ sra(a2, a2, kSmiTagSize); |
| 6006 | __ sra(a3, a3, kSmiTagSize); |
| 6007 | |
| 6008 | // Both strings are non-empty. |
| 6009 | // a0: first string |
| 6010 | // a1: second string |
| 6011 | // a2: length of first string |
| 6012 | // a3: length of second string |
| 6013 | // t0: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 6014 | // t1: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 6015 | // Look at the length of the result of adding the two strings. |
| 6016 | Label string_add_flat_result, longer_than_two; |
| 6017 | // Adding two lengths can't overflow. |
| 6018 | STATIC_ASSERT(String::kMaxLength < String::kMaxLength * 2); |
| 6019 | __ Addu(t2, a2, Operand(a3)); |
| 6020 | // Use the symbol table when adding two one character strings, as it |
| 6021 | // helps later optimizations to return a symbol here. |
| 6022 | __ Branch(&longer_than_two, ne, t2, Operand(2)); |
| 6023 | |
| 6024 | // Check that both strings are non-external ASCII strings. |
| 6025 | if (flags_ != NO_STRING_ADD_FLAGS) { |
| 6026 | __ lw(t0, FieldMemOperand(a0, HeapObject::kMapOffset)); |
| 6027 | __ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset)); |
| 6028 | __ lbu(t0, FieldMemOperand(t0, Map::kInstanceTypeOffset)); |
| 6029 | __ lbu(t1, FieldMemOperand(t1, Map::kInstanceTypeOffset)); |
| 6030 | } |
| 6031 | __ JumpIfBothInstanceTypesAreNotSequentialAscii(t0, t1, t2, t3, |
| 6032 | &string_add_runtime); |
| 6033 | |
| 6034 | // Get the two characters forming the sub string. |
| 6035 | __ lbu(a2, FieldMemOperand(a0, SeqAsciiString::kHeaderSize)); |
| 6036 | __ lbu(a3, FieldMemOperand(a1, SeqAsciiString::kHeaderSize)); |
| 6037 | |
| 6038 | // Try to lookup two character string in symbol table. If it is not found |
| 6039 | // just allocate a new one. |
| 6040 | Label make_two_character_string; |
| 6041 | StringHelper::GenerateTwoCharacterSymbolTableProbe( |
| 6042 | masm, a2, a3, t2, t3, t0, t1, t4, &make_two_character_string); |
| 6043 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 6044 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 6045 | __ Ret(); |
| 6046 | |
| 6047 | __ bind(&make_two_character_string); |
| 6048 | // Resulting string has length 2 and first chars of two strings |
| 6049 | // are combined into single halfword in a2 register. |
| 6050 | // So we can fill resulting string without two loops by a single |
| 6051 | // halfword store instruction (which assumes that processor is |
| 6052 | // in a little endian mode). |
| 6053 | __ li(t2, Operand(2)); |
| 6054 | __ AllocateAsciiString(v0, t2, t0, t1, t4, &string_add_runtime); |
| 6055 | __ sh(a2, FieldMemOperand(v0, SeqAsciiString::kHeaderSize)); |
| 6056 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 6057 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 6058 | __ Ret(); |
| 6059 | |
| 6060 | __ bind(&longer_than_two); |
| 6061 | // Check if resulting string will be flat. |
| 6062 | __ Branch(&string_add_flat_result, lt, t2, |
| 6063 | Operand(String::kMinNonFlatLength)); |
| 6064 | // Handle exceptionally long strings in the runtime system. |
| 6065 | STATIC_ASSERT((String::kMaxLength & 0x80000000) == 0); |
| 6066 | ASSERT(IsPowerOf2(String::kMaxLength + 1)); |
| 6067 | // kMaxLength + 1 is representable as shifted literal, kMaxLength is not. |
| 6068 | __ Branch(&string_add_runtime, hs, t2, Operand(String::kMaxLength + 1)); |
| 6069 | |
| 6070 | // If result is not supposed to be flat, allocate a cons string object. |
| 6071 | // If both strings are ASCII the result is an ASCII cons string. |
| 6072 | if (flags_ != NO_STRING_ADD_FLAGS) { |
| 6073 | __ lw(t0, FieldMemOperand(a0, HeapObject::kMapOffset)); |
| 6074 | __ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset)); |
| 6075 | __ lbu(t0, FieldMemOperand(t0, Map::kInstanceTypeOffset)); |
| 6076 | __ lbu(t1, FieldMemOperand(t1, Map::kInstanceTypeOffset)); |
| 6077 | } |
| 6078 | Label non_ascii, allocated, ascii_data; |
| 6079 | STATIC_ASSERT(kTwoByteStringTag == 0); |
| 6080 | // Branch to non_ascii if either string-encoding field is zero (non-ascii). |
| 6081 | __ And(t4, t0, Operand(t1)); |
| 6082 | __ And(t4, t4, Operand(kStringEncodingMask)); |
| 6083 | __ Branch(&non_ascii, eq, t4, Operand(zero_reg)); |
| 6084 | |
| 6085 | // Allocate an ASCII cons string. |
| 6086 | __ bind(&ascii_data); |
| 6087 | __ AllocateAsciiConsString(t3, t2, t0, t1, &string_add_runtime); |
| 6088 | __ bind(&allocated); |
| 6089 | // Fill the fields of the cons string. |
| 6090 | __ sw(a0, FieldMemOperand(t3, ConsString::kFirstOffset)); |
| 6091 | __ sw(a1, FieldMemOperand(t3, ConsString::kSecondOffset)); |
| 6092 | __ mov(v0, t3); |
| 6093 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 6094 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 6095 | __ Ret(); |
| 6096 | |
| 6097 | __ bind(&non_ascii); |
| 6098 | // At least one of the strings is two-byte. Check whether it happens |
| 6099 | // to contain only ASCII characters. |
| 6100 | // t0: first instance type. |
| 6101 | // t1: second instance type. |
| 6102 | // Branch to if _both_ instances have kAsciiDataHintMask set. |
| 6103 | __ And(at, t0, Operand(kAsciiDataHintMask)); |
| 6104 | __ and_(at, at, t1); |
| 6105 | __ Branch(&ascii_data, ne, at, Operand(zero_reg)); |
| 6106 | |
| 6107 | __ xor_(t0, t0, t1); |
| 6108 | STATIC_ASSERT(kAsciiStringTag != 0 && kAsciiDataHintTag != 0); |
| 6109 | __ And(t0, t0, Operand(kAsciiStringTag | kAsciiDataHintTag)); |
| 6110 | __ Branch(&ascii_data, eq, t0, Operand(kAsciiStringTag | kAsciiDataHintTag)); |
| 6111 | |
| 6112 | // Allocate a two byte cons string. |
| 6113 | __ AllocateTwoByteConsString(t3, t2, t0, t1, &string_add_runtime); |
| 6114 | __ Branch(&allocated); |
| 6115 | |
| 6116 | // Handle creating a flat result. First check that both strings are |
| 6117 | // sequential and that they have the same encoding. |
| 6118 | // a0: first string |
| 6119 | // a1: second string |
| 6120 | // a2: length of first string |
| 6121 | // a3: length of second string |
| 6122 | // t0: first string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 6123 | // t1: second string instance type (if flags_ == NO_STRING_ADD_FLAGS) |
| 6124 | // t2: sum of lengths. |
| 6125 | __ bind(&string_add_flat_result); |
| 6126 | if (flags_ != NO_STRING_ADD_FLAGS) { |
| 6127 | __ lw(t0, FieldMemOperand(a0, HeapObject::kMapOffset)); |
| 6128 | __ lw(t1, FieldMemOperand(a1, HeapObject::kMapOffset)); |
| 6129 | __ lbu(t0, FieldMemOperand(t0, Map::kInstanceTypeOffset)); |
| 6130 | __ lbu(t1, FieldMemOperand(t1, Map::kInstanceTypeOffset)); |
| 6131 | } |
| 6132 | // Check that both strings are sequential, meaning that we |
| 6133 | // branch to runtime if either string tag is non-zero. |
| 6134 | STATIC_ASSERT(kSeqStringTag == 0); |
| 6135 | __ Or(t4, t0, Operand(t1)); |
| 6136 | __ And(t4, t4, Operand(kStringRepresentationMask)); |
| 6137 | __ Branch(&string_add_runtime, ne, t4, Operand(zero_reg)); |
| 6138 | |
| 6139 | // Now check if both strings have the same encoding (ASCII/Two-byte). |
| 6140 | // a0: first string |
| 6141 | // a1: second string |
| 6142 | // a2: length of first string |
| 6143 | // a3: length of second string |
| 6144 | // t0: first string instance type |
| 6145 | // t1: second string instance type |
| 6146 | // t2: sum of lengths. |
| 6147 | Label non_ascii_string_add_flat_result; |
| 6148 | ASSERT(IsPowerOf2(kStringEncodingMask)); // Just one bit to test. |
| 6149 | __ xor_(t3, t1, t0); |
| 6150 | __ And(t3, t3, Operand(kStringEncodingMask)); |
| 6151 | __ Branch(&string_add_runtime, ne, t3, Operand(zero_reg)); |
| 6152 | // And see if it's ASCII (0) or two-byte (1). |
| 6153 | __ And(t3, t0, Operand(kStringEncodingMask)); |
| 6154 | __ Branch(&non_ascii_string_add_flat_result, eq, t3, Operand(zero_reg)); |
| 6155 | |
| 6156 | // Both strings are sequential ASCII strings. We also know that they are |
| 6157 | // short (since the sum of the lengths is less than kMinNonFlatLength). |
| 6158 | // t2: length of resulting flat string |
| 6159 | __ AllocateAsciiString(t3, t2, t0, t1, t4, &string_add_runtime); |
| 6160 | // Locate first character of result. |
| 6161 | __ Addu(t2, t3, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 6162 | // Locate first character of first argument. |
| 6163 | __ Addu(a0, a0, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 6164 | // a0: first character of first string. |
| 6165 | // a1: second string. |
| 6166 | // a2: length of first string. |
| 6167 | // a3: length of second string. |
| 6168 | // t2: first character of result. |
| 6169 | // t3: result string. |
| 6170 | StringHelper::GenerateCopyCharacters(masm, t2, a0, a2, t0, true); |
| 6171 | |
| 6172 | // Load second argument and locate first character. |
| 6173 | __ Addu(a1, a1, Operand(SeqAsciiString::kHeaderSize - kHeapObjectTag)); |
| 6174 | // a1: first character of second string. |
| 6175 | // a3: length of second string. |
| 6176 | // t2: next character of result. |
| 6177 | // t3: result string. |
| 6178 | StringHelper::GenerateCopyCharacters(masm, t2, a1, a3, t0, true); |
| 6179 | __ mov(v0, t3); |
| 6180 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 6181 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 6182 | __ Ret(); |
| 6183 | |
| 6184 | __ bind(&non_ascii_string_add_flat_result); |
| 6185 | // Both strings are sequential two byte strings. |
| 6186 | // a0: first string. |
| 6187 | // a1: second string. |
| 6188 | // a2: length of first string. |
| 6189 | // a3: length of second string. |
| 6190 | // t2: sum of length of strings. |
| 6191 | __ AllocateTwoByteString(t3, t2, t0, t1, t4, &string_add_runtime); |
| 6192 | // a0: first string. |
| 6193 | // a1: second string. |
| 6194 | // a2: length of first string. |
| 6195 | // a3: length of second string. |
| 6196 | // t3: result string. |
| 6197 | |
| 6198 | // Locate first character of result. |
| 6199 | __ Addu(t2, t3, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 6200 | // Locate first character of first argument. |
| 6201 | __ Addu(a0, a0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 6202 | |
| 6203 | // a0: first character of first string. |
| 6204 | // a1: second string. |
| 6205 | // a2: length of first string. |
| 6206 | // a3: length of second string. |
| 6207 | // t2: first character of result. |
| 6208 | // t3: result string. |
| 6209 | StringHelper::GenerateCopyCharacters(masm, t2, a0, a2, t0, false); |
| 6210 | |
| 6211 | // Locate first character of second argument. |
| 6212 | __ Addu(a1, a1, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
| 6213 | |
| 6214 | // a1: first character of second string. |
| 6215 | // a3: length of second string. |
| 6216 | // t2: next character of result (after copy of first string). |
| 6217 | // t3: result string. |
| 6218 | StringHelper::GenerateCopyCharacters(masm, t2, a1, a3, t0, false); |
| 6219 | |
| 6220 | __ mov(v0, t3); |
| 6221 | __ IncrementCounter(counters->string_add_native(), 1, a2, a3); |
| 6222 | __ Addu(sp, sp, Operand(2 * kPointerSize)); |
| 6223 | __ Ret(); |
| 6224 | |
| 6225 | // Just jump to runtime to add the two strings. |
| 6226 | __ bind(&string_add_runtime); |
| 6227 | __ TailCallRuntime(Runtime::kStringAdd, 2, 1); |
| 6228 | |
| 6229 | if (call_builtin.is_linked()) { |
| 6230 | __ bind(&call_builtin); |
| 6231 | __ InvokeBuiltin(builtin_id, JUMP_FUNCTION); |
| 6232 | } |
| 6233 | } |
| 6234 | |
| 6235 | |
| 6236 | void StringAddStub::GenerateConvertArgument(MacroAssembler* masm, |
| 6237 | int stack_offset, |
| 6238 | Register arg, |
| 6239 | Register scratch1, |
| 6240 | Register scratch2, |
| 6241 | Register scratch3, |
| 6242 | Register scratch4, |
| 6243 | Label* slow) { |
| 6244 | // First check if the argument is already a string. |
| 6245 | Label not_string, done; |
| 6246 | __ JumpIfSmi(arg, ¬_string); |
| 6247 | __ GetObjectType(arg, scratch1, scratch1); |
| 6248 | __ Branch(&done, lt, scratch1, Operand(FIRST_NONSTRING_TYPE)); |
| 6249 | |
| 6250 | // Check the number to string cache. |
| 6251 | Label not_cached; |
| 6252 | __ bind(¬_string); |
| 6253 | // Puts the cached result into scratch1. |
| 6254 | NumberToStringStub::GenerateLookupNumberStringCache(masm, |
| 6255 | arg, |
| 6256 | scratch1, |
| 6257 | scratch2, |
| 6258 | scratch3, |
| 6259 | scratch4, |
| 6260 | false, |
| 6261 | ¬_cached); |
| 6262 | __ mov(arg, scratch1); |
| 6263 | __ sw(arg, MemOperand(sp, stack_offset)); |
| 6264 | __ jmp(&done); |
| 6265 | |
| 6266 | // Check if the argument is a safe string wrapper. |
| 6267 | __ bind(¬_cached); |
| 6268 | __ JumpIfSmi(arg, slow); |
| 6269 | __ GetObjectType(arg, scratch1, scratch2); // map -> scratch1. |
| 6270 | __ Branch(slow, ne, scratch2, Operand(JS_VALUE_TYPE)); |
| 6271 | __ lbu(scratch2, FieldMemOperand(scratch1, Map::kBitField2Offset)); |
| 6272 | __ li(scratch4, 1 << Map::kStringWrapperSafeForDefaultValueOf); |
| 6273 | __ And(scratch2, scratch2, scratch4); |
| 6274 | __ Branch(slow, ne, scratch2, Operand(scratch4)); |
| 6275 | __ lw(arg, FieldMemOperand(arg, JSValue::kValueOffset)); |
| 6276 | __ sw(arg, MemOperand(sp, stack_offset)); |
| 6277 | |
| 6278 | __ bind(&done); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6279 | } |
| 6280 | |
| 6281 | |
| 6282 | void ICCompareStub::GenerateSmis(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6283 | ASSERT(state_ == CompareIC::SMIS); |
| 6284 | Label miss; |
| 6285 | __ Or(a2, a1, a0); |
| 6286 | __ JumpIfNotSmi(a2, &miss); |
| 6287 | |
| 6288 | if (GetCondition() == eq) { |
| 6289 | // For equality we do not care about the sign of the result. |
| 6290 | __ Subu(v0, a0, a1); |
| 6291 | } else { |
| 6292 | // Untag before subtracting to avoid handling overflow. |
| 6293 | __ SmiUntag(a1); |
| 6294 | __ SmiUntag(a0); |
| 6295 | __ Subu(v0, a1, a0); |
| 6296 | } |
| 6297 | __ Ret(); |
| 6298 | |
| 6299 | __ bind(&miss); |
| 6300 | GenerateMiss(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6301 | } |
| 6302 | |
| 6303 | |
| 6304 | void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6305 | ASSERT(state_ == CompareIC::HEAP_NUMBERS); |
| 6306 | |
| 6307 | Label generic_stub; |
| 6308 | Label unordered; |
| 6309 | Label miss; |
| 6310 | __ And(a2, a1, Operand(a0)); |
| 6311 | __ JumpIfSmi(a2, &generic_stub); |
| 6312 | |
| 6313 | __ GetObjectType(a0, a2, a2); |
| 6314 | __ Branch(&miss, ne, a2, Operand(HEAP_NUMBER_TYPE)); |
| 6315 | __ GetObjectType(a1, a2, a2); |
| 6316 | __ Branch(&miss, ne, a2, Operand(HEAP_NUMBER_TYPE)); |
| 6317 | |
| 6318 | // Inlining the double comparison and falling back to the general compare |
| 6319 | // stub if NaN is involved or FPU is unsupported. |
| 6320 | if (CpuFeatures::IsSupported(FPU)) { |
| 6321 | CpuFeatures::Scope scope(FPU); |
| 6322 | |
| 6323 | // Load left and right operand. |
| 6324 | __ Subu(a2, a1, Operand(kHeapObjectTag)); |
| 6325 | __ ldc1(f0, MemOperand(a2, HeapNumber::kValueOffset)); |
| 6326 | __ Subu(a2, a0, Operand(kHeapObjectTag)); |
| 6327 | __ ldc1(f2, MemOperand(a2, HeapNumber::kValueOffset)); |
| 6328 | |
| 6329 | Label fpu_eq, fpu_lt, fpu_gt; |
| 6330 | // Compare operands (test if unordered). |
| 6331 | __ c(UN, D, f0, f2); |
| 6332 | // Don't base result on status bits when a NaN is involved. |
| 6333 | __ bc1t(&unordered); |
| 6334 | __ nop(); |
| 6335 | |
| 6336 | // Test if equal. |
| 6337 | __ c(EQ, D, f0, f2); |
| 6338 | __ bc1t(&fpu_eq); |
| 6339 | __ nop(); |
| 6340 | |
| 6341 | // Test if unordered or less (unordered case is already handled). |
| 6342 | __ c(ULT, D, f0, f2); |
| 6343 | __ bc1t(&fpu_lt); |
| 6344 | __ nop(); |
| 6345 | |
| 6346 | // Otherwise it's greater. |
| 6347 | __ bc1f(&fpu_gt); |
| 6348 | __ nop(); |
| 6349 | |
| 6350 | // Return a result of -1, 0, or 1. |
| 6351 | __ bind(&fpu_eq); |
| 6352 | __ li(v0, Operand(EQUAL)); |
| 6353 | __ Ret(); |
| 6354 | |
| 6355 | __ bind(&fpu_lt); |
| 6356 | __ li(v0, Operand(LESS)); |
| 6357 | __ Ret(); |
| 6358 | |
| 6359 | __ bind(&fpu_gt); |
| 6360 | __ li(v0, Operand(GREATER)); |
| 6361 | __ Ret(); |
| 6362 | |
| 6363 | __ bind(&unordered); |
| 6364 | } |
| 6365 | |
| 6366 | CompareStub stub(GetCondition(), strict(), NO_COMPARE_FLAGS, a1, a0); |
| 6367 | __ bind(&generic_stub); |
| 6368 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 6369 | |
| 6370 | __ bind(&miss); |
| 6371 | GenerateMiss(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6372 | } |
| 6373 | |
| 6374 | |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 6375 | void ICCompareStub::GenerateSymbols(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6376 | ASSERT(state_ == CompareIC::SYMBOLS); |
| 6377 | Label miss; |
| 6378 | |
| 6379 | // Registers containing left and right operands respectively. |
| 6380 | Register left = a1; |
| 6381 | Register right = a0; |
| 6382 | Register tmp1 = a2; |
| 6383 | Register tmp2 = a3; |
| 6384 | |
| 6385 | // Check that both operands are heap objects. |
| 6386 | __ JumpIfEitherSmi(left, right, &miss); |
| 6387 | |
| 6388 | // Check that both operands are symbols. |
| 6389 | __ lw(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 6390 | __ lw(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 6391 | __ lbu(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 6392 | __ lbu(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 6393 | STATIC_ASSERT(kSymbolTag != 0); |
| 6394 | __ And(tmp1, tmp1, Operand(tmp2)); |
| 6395 | __ And(tmp1, tmp1, kIsSymbolMask); |
| 6396 | __ Branch(&miss, eq, tmp1, Operand(zero_reg)); |
| 6397 | // Make sure a0 is non-zero. At this point input operands are |
| 6398 | // guaranteed to be non-zero. |
| 6399 | ASSERT(right.is(a0)); |
| 6400 | STATIC_ASSERT(EQUAL == 0); |
| 6401 | STATIC_ASSERT(kSmiTag == 0); |
| 6402 | __ mov(v0, right); |
| 6403 | // Symbols are compared by identity. |
| 6404 | __ Ret(ne, left, Operand(right)); |
| 6405 | __ li(v0, Operand(Smi::FromInt(EQUAL))); |
| 6406 | __ Ret(); |
| 6407 | |
| 6408 | __ bind(&miss); |
| 6409 | GenerateMiss(masm); |
| 6410 | } |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 6411 | |
| 6412 | |
| 6413 | void ICCompareStub::GenerateStrings(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6414 | ASSERT(state_ == CompareIC::STRINGS); |
| 6415 | Label miss; |
| 6416 | |
| 6417 | // Registers containing left and right operands respectively. |
| 6418 | Register left = a1; |
| 6419 | Register right = a0; |
| 6420 | Register tmp1 = a2; |
| 6421 | Register tmp2 = a3; |
| 6422 | Register tmp3 = t0; |
| 6423 | Register tmp4 = t1; |
| 6424 | Register tmp5 = t2; |
| 6425 | |
| 6426 | // Check that both operands are heap objects. |
| 6427 | __ JumpIfEitherSmi(left, right, &miss); |
| 6428 | |
| 6429 | // Check that both operands are strings. This leaves the instance |
| 6430 | // types loaded in tmp1 and tmp2. |
| 6431 | __ lw(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 6432 | __ lw(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 6433 | __ lbu(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 6434 | __ lbu(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 6435 | STATIC_ASSERT(kNotStringTag != 0); |
| 6436 | __ Or(tmp3, tmp1, tmp2); |
| 6437 | __ And(tmp5, tmp3, Operand(kIsNotStringMask)); |
| 6438 | __ Branch(&miss, ne, tmp5, Operand(zero_reg)); |
| 6439 | |
| 6440 | // Fast check for identical strings. |
| 6441 | Label left_ne_right; |
| 6442 | STATIC_ASSERT(EQUAL == 0); |
| 6443 | STATIC_ASSERT(kSmiTag == 0); |
| 6444 | __ Branch(&left_ne_right, ne, left, Operand(right), USE_DELAY_SLOT); |
| 6445 | __ mov(v0, zero_reg); // In the delay slot. |
| 6446 | __ Ret(); |
| 6447 | __ bind(&left_ne_right); |
| 6448 | |
| 6449 | // Handle not identical strings. |
| 6450 | |
| 6451 | // Check that both strings are symbols. If they are, we're done |
| 6452 | // because we already know they are not identical. |
| 6453 | ASSERT(GetCondition() == eq); |
| 6454 | STATIC_ASSERT(kSymbolTag != 0); |
| 6455 | __ And(tmp3, tmp1, Operand(tmp2)); |
| 6456 | __ And(tmp5, tmp3, Operand(kIsSymbolMask)); |
| 6457 | Label is_symbol; |
| 6458 | __ Branch(&is_symbol, eq, tmp5, Operand(zero_reg), USE_DELAY_SLOT); |
| 6459 | __ mov(v0, a0); // In the delay slot. |
| 6460 | // Make sure a0 is non-zero. At this point input operands are |
| 6461 | // guaranteed to be non-zero. |
| 6462 | ASSERT(right.is(a0)); |
| 6463 | __ Ret(); |
| 6464 | __ bind(&is_symbol); |
| 6465 | |
| 6466 | // Check that both strings are sequential ASCII. |
| 6467 | Label runtime; |
| 6468 | __ JumpIfBothInstanceTypesAreNotSequentialAscii(tmp1, tmp2, tmp3, tmp4, |
| 6469 | &runtime); |
| 6470 | |
| 6471 | // Compare flat ASCII strings. Returns when done. |
| 6472 | StringCompareStub::GenerateFlatAsciiStringEquals( |
| 6473 | masm, left, right, tmp1, tmp2, tmp3); |
| 6474 | |
| 6475 | // Handle more complex cases in runtime. |
| 6476 | __ bind(&runtime); |
| 6477 | __ Push(left, right); |
| 6478 | __ TailCallRuntime(Runtime::kStringEquals, 2, 1); |
| 6479 | |
| 6480 | __ bind(&miss); |
| 6481 | GenerateMiss(masm); |
karlklose@chromium.org | 83a4728 | 2011-05-11 11:54:09 +0000 | [diff] [blame] | 6482 | } |
| 6483 | |
| 6484 | |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6485 | void ICCompareStub::GenerateObjects(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6486 | ASSERT(state_ == CompareIC::OBJECTS); |
| 6487 | Label miss; |
| 6488 | __ And(a2, a1, Operand(a0)); |
| 6489 | __ JumpIfSmi(a2, &miss); |
| 6490 | |
| 6491 | __ GetObjectType(a0, a2, a2); |
| 6492 | __ Branch(&miss, ne, a2, Operand(JS_OBJECT_TYPE)); |
| 6493 | __ GetObjectType(a1, a2, a2); |
| 6494 | __ Branch(&miss, ne, a2, Operand(JS_OBJECT_TYPE)); |
| 6495 | |
| 6496 | ASSERT(GetCondition() == eq); |
| 6497 | __ Subu(v0, a0, Operand(a1)); |
| 6498 | __ Ret(); |
| 6499 | |
| 6500 | __ bind(&miss); |
| 6501 | GenerateMiss(masm); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6502 | } |
| 6503 | |
| 6504 | |
| 6505 | void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6506 | __ Push(a1, a0); |
| 6507 | __ push(ra); |
| 6508 | |
| 6509 | // Call the runtime system in a fresh internal frame. |
| 6510 | ExternalReference miss = ExternalReference(IC_Utility(IC::kCompareIC_Miss), |
| 6511 | masm->isolate()); |
| 6512 | __ EnterInternalFrame(); |
| 6513 | __ Push(a1, a0); |
| 6514 | __ li(t0, Operand(Smi::FromInt(op_))); |
| 6515 | __ push(t0); |
| 6516 | __ CallExternalReference(miss, 3); |
| 6517 | __ LeaveInternalFrame(); |
| 6518 | // Compute the entry point of the rewritten stub. |
| 6519 | __ Addu(a2, v0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 6520 | // Restore registers. |
| 6521 | __ pop(ra); |
| 6522 | __ pop(a0); |
| 6523 | __ pop(a1); |
| 6524 | __ Jump(a2); |
| 6525 | } |
| 6526 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 6527 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6528 | void DirectCEntryStub::Generate(MacroAssembler* masm) { |
| 6529 | // No need to pop or drop anything, LeaveExitFrame will restore the old |
| 6530 | // stack, thus dropping the allocated space for the return value. |
| 6531 | // The saved ra is after the reserved stack space for the 4 args. |
| 6532 | __ lw(t9, MemOperand(sp, kCArgsSlotsSize)); |
| 6533 | |
| 6534 | if (FLAG_debug_code && EnableSlowAsserts()) { |
| 6535 | // In case of an error the return address may point to a memory area |
| 6536 | // filled with kZapValue by the GC. |
| 6537 | // Dereference the address and check for this. |
| 6538 | __ lw(t0, MemOperand(t9)); |
| 6539 | __ Assert(ne, "Received invalid return address.", t0, |
| 6540 | Operand(reinterpret_cast<uint32_t>(kZapValue))); |
| 6541 | } |
| 6542 | __ Jump(t9); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6543 | } |
| 6544 | |
| 6545 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6546 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
| 6547 | ExternalReference function) { |
| 6548 | __ li(t9, Operand(function)); |
| 6549 | this->GenerateCall(masm, t9); |
| 6550 | } |
| 6551 | |
erik.corry@gmail.com | d6076d9 | 2011-06-06 09:39:18 +0000 | [diff] [blame] | 6552 | |
vegorov@chromium.org | 7304bca | 2011-05-16 12:14:13 +0000 | [diff] [blame] | 6553 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
| 6554 | Register target) { |
| 6555 | __ Move(t9, target); |
| 6556 | __ AssertStackIsAligned(); |
| 6557 | // Allocate space for arg slots. |
| 6558 | __ Subu(sp, sp, kCArgsSlotsSize); |
| 6559 | |
| 6560 | // Block the trampoline pool through the whole function to make sure the |
| 6561 | // number of generated instructions is constant. |
| 6562 | Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm); |
| 6563 | |
| 6564 | // We need to get the current 'pc' value, which is not available on MIPS. |
| 6565 | Label find_ra; |
| 6566 | masm->bal(&find_ra); // ra = pc + 8. |
| 6567 | masm->nop(); // Branch delay slot nop. |
| 6568 | masm->bind(&find_ra); |
| 6569 | |
| 6570 | const int kNumInstructionsToJump = 6; |
| 6571 | masm->addiu(ra, ra, kNumInstructionsToJump * kPointerSize); |
| 6572 | // Push return address (accessible to GC through exit frame pc). |
| 6573 | // This spot for ra was reserved in EnterExitFrame. |
| 6574 | masm->sw(ra, MemOperand(sp, kCArgsSlotsSize)); |
| 6575 | masm->li(ra, Operand(reinterpret_cast<intptr_t>(GetCode().location()), |
| 6576 | RelocInfo::CODE_TARGET), true); |
| 6577 | // Call the function. |
| 6578 | masm->Jump(t9); |
| 6579 | // Make sure the stored 'ra' points to this position. |
| 6580 | ASSERT_EQ(kNumInstructionsToJump, masm->InstructionsGeneratedSince(&find_ra)); |
| 6581 | } |
| 6582 | |
| 6583 | |
| 6584 | MaybeObject* StringDictionaryLookupStub::GenerateNegativeLookup( |
| 6585 | MacroAssembler* masm, |
| 6586 | Label* miss, |
| 6587 | Label* done, |
| 6588 | Register receiver, |
| 6589 | Register properties, |
| 6590 | String* name, |
| 6591 | Register scratch0) { |
| 6592 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 6593 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 6594 | // undefined value), it guarantees the hash table doesn't contain the |
| 6595 | // property. It's true even if some slots represent deleted properties |
| 6596 | // (their names are the null value). |
| 6597 | for (int i = 0; i < kInlinedProbes; i++) { |
| 6598 | // scratch0 points to properties hash. |
| 6599 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6600 | Register index = scratch0; |
| 6601 | // Capacity is smi 2^n. |
| 6602 | __ lw(index, FieldMemOperand(properties, kCapacityOffset)); |
| 6603 | __ Subu(index, index, Operand(1)); |
| 6604 | __ And(index, index, Operand( |
| 6605 | Smi::FromInt(name->Hash() + StringDictionary::GetProbeOffset(i)))); |
| 6606 | |
| 6607 | // Scale the index by multiplying by the entry size. |
| 6608 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6609 | // index *= 3. |
| 6610 | __ mov(at, index); |
| 6611 | __ sll(index, index, 1); |
| 6612 | __ Addu(index, index, at); |
| 6613 | |
| 6614 | Register entity_name = scratch0; |
| 6615 | // Having undefined at this place means the name is not contained. |
| 6616 | ASSERT_EQ(kSmiTagSize, 1); |
| 6617 | Register tmp = properties; |
| 6618 | |
| 6619 | __ sll(scratch0, index, 1); |
| 6620 | __ Addu(tmp, properties, scratch0); |
| 6621 | __ lw(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| 6622 | |
| 6623 | ASSERT(!tmp.is(entity_name)); |
| 6624 | __ LoadRoot(tmp, Heap::kUndefinedValueRootIndex); |
| 6625 | __ Branch(done, eq, entity_name, Operand(tmp)); |
| 6626 | |
| 6627 | if (i != kInlinedProbes - 1) { |
| 6628 | // Stop if found the property. |
| 6629 | __ Branch(miss, eq, entity_name, Operand(Handle<String>(name))); |
| 6630 | |
| 6631 | // Check if the entry name is not a symbol. |
| 6632 | __ lw(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| 6633 | __ lbu(entity_name, |
| 6634 | FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| 6635 | __ And(scratch0, entity_name, Operand(kIsSymbolMask)); |
| 6636 | __ Branch(miss, eq, scratch0, Operand(zero_reg)); |
| 6637 | |
| 6638 | // Restore the properties. |
| 6639 | __ lw(properties, |
| 6640 | FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 6641 | } |
| 6642 | } |
| 6643 | |
| 6644 | const int spill_mask = |
| 6645 | (ra.bit() | t2.bit() | t1.bit() | t0.bit() | a3.bit() | |
| 6646 | a2.bit() | a1.bit() | a0.bit()); |
| 6647 | |
| 6648 | __ MultiPush(spill_mask); |
| 6649 | __ lw(a0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 6650 | __ li(a1, Operand(Handle<String>(name))); |
| 6651 | StringDictionaryLookupStub stub(NEGATIVE_LOOKUP); |
| 6652 | MaybeObject* result = masm->TryCallStub(&stub); |
| 6653 | if (result->IsFailure()) return result; |
| 6654 | __ MultiPop(spill_mask); |
| 6655 | |
| 6656 | __ Branch(done, eq, v0, Operand(zero_reg)); |
| 6657 | __ Branch(miss, ne, v0, Operand(zero_reg)); |
| 6658 | return result; |
| 6659 | } |
| 6660 | |
| 6661 | |
| 6662 | // Probe the string dictionary in the |elements| register. Jump to the |
| 6663 | // |done| label if a property with the given name is found. Jump to |
| 6664 | // the |miss| label otherwise. |
| 6665 | // If lookup was successful |scratch2| will be equal to elements + 4 * index. |
| 6666 | void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 6667 | Label* miss, |
| 6668 | Label* done, |
| 6669 | Register elements, |
| 6670 | Register name, |
| 6671 | Register scratch1, |
| 6672 | Register scratch2) { |
| 6673 | // Assert that name contains a string. |
| 6674 | if (FLAG_debug_code) __ AbortIfNotString(name); |
| 6675 | |
| 6676 | // Compute the capacity mask. |
| 6677 | __ lw(scratch1, FieldMemOperand(elements, kCapacityOffset)); |
| 6678 | __ sra(scratch1, scratch1, kSmiTagSize); // convert smi to int |
| 6679 | __ Subu(scratch1, scratch1, Operand(1)); |
| 6680 | |
| 6681 | // Generate an unrolled loop that performs a few probes before |
| 6682 | // giving up. Measurements done on Gmail indicate that 2 probes |
| 6683 | // cover ~93% of loads from dictionaries. |
| 6684 | for (int i = 0; i < kInlinedProbes; i++) { |
| 6685 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6686 | __ lw(scratch2, FieldMemOperand(name, String::kHashFieldOffset)); |
| 6687 | if (i > 0) { |
| 6688 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 6689 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 6690 | // shifted in the following and instruction. |
| 6691 | ASSERT(StringDictionary::GetProbeOffset(i) < |
| 6692 | 1 << (32 - String::kHashFieldOffset)); |
| 6693 | __ Addu(scratch2, scratch2, Operand( |
| 6694 | StringDictionary::GetProbeOffset(i) << String::kHashShift)); |
| 6695 | } |
| 6696 | __ srl(scratch2, scratch2, String::kHashShift); |
| 6697 | __ And(scratch2, scratch1, scratch2); |
| 6698 | |
| 6699 | // Scale the index by multiplying by the element size. |
| 6700 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6701 | // scratch2 = scratch2 * 3. |
| 6702 | |
| 6703 | __ mov(at, scratch2); |
| 6704 | __ sll(scratch2, scratch2, 1); |
| 6705 | __ Addu(scratch2, scratch2, at); |
| 6706 | |
| 6707 | // Check if the key is identical to the name. |
| 6708 | __ sll(at, scratch2, 2); |
| 6709 | __ Addu(scratch2, elements, at); |
| 6710 | __ lw(at, FieldMemOperand(scratch2, kElementsStartOffset)); |
| 6711 | __ Branch(done, eq, name, Operand(at)); |
| 6712 | } |
| 6713 | |
| 6714 | const int spill_mask = |
| 6715 | (ra.bit() | t2.bit() | t1.bit() | t0.bit() | |
| 6716 | a3.bit() | a2.bit() | a1.bit() | a0.bit()) & |
| 6717 | ~(scratch1.bit() | scratch2.bit()); |
| 6718 | |
| 6719 | __ MultiPush(spill_mask); |
| 6720 | __ Move(a0, elements); |
| 6721 | __ Move(a1, name); |
| 6722 | StringDictionaryLookupStub stub(POSITIVE_LOOKUP); |
| 6723 | __ CallStub(&stub); |
| 6724 | __ mov(scratch2, a2); |
| 6725 | __ MultiPop(spill_mask); |
| 6726 | |
| 6727 | __ Branch(done, ne, v0, Operand(zero_reg)); |
| 6728 | __ Branch(miss, eq, v0, Operand(zero_reg)); |
| 6729 | } |
| 6730 | |
| 6731 | |
| 6732 | void StringDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| 6733 | // Registers: |
| 6734 | // result: StringDictionary to probe |
| 6735 | // a1: key |
| 6736 | // : StringDictionary to probe. |
| 6737 | // index_: will hold an index of entry if lookup is successful. |
| 6738 | // might alias with result_. |
| 6739 | // Returns: |
| 6740 | // result_ is zero if lookup failed, non zero otherwise. |
| 6741 | |
| 6742 | Register result = v0; |
| 6743 | Register dictionary = a0; |
| 6744 | Register key = a1; |
| 6745 | Register index = a2; |
| 6746 | Register mask = a3; |
| 6747 | Register hash = t0; |
| 6748 | Register undefined = t1; |
| 6749 | Register entry_key = t2; |
| 6750 | |
| 6751 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 6752 | |
| 6753 | __ lw(mask, FieldMemOperand(dictionary, kCapacityOffset)); |
| 6754 | __ sra(mask, mask, kSmiTagSize); |
| 6755 | __ Subu(mask, mask, Operand(1)); |
| 6756 | |
| 6757 | __ lw(hash, FieldMemOperand(key, String::kHashFieldOffset)); |
| 6758 | |
| 6759 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 6760 | |
| 6761 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 6762 | // Compute the masked index: (hash + i + i * i) & mask. |
| 6763 | // Capacity is smi 2^n. |
| 6764 | if (i > 0) { |
| 6765 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 6766 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 6767 | // shifted in the following and instruction. |
| 6768 | ASSERT(StringDictionary::GetProbeOffset(i) < |
| 6769 | 1 << (32 - String::kHashFieldOffset)); |
| 6770 | __ Addu(index, hash, Operand( |
| 6771 | StringDictionary::GetProbeOffset(i) << String::kHashShift)); |
| 6772 | } else { |
| 6773 | __ mov(index, hash); |
| 6774 | } |
| 6775 | __ srl(index, index, String::kHashShift); |
| 6776 | __ And(index, mask, index); |
| 6777 | |
| 6778 | // Scale the index by multiplying by the entry size. |
| 6779 | ASSERT(StringDictionary::kEntrySize == 3); |
| 6780 | // index *= 3. |
| 6781 | __ mov(at, index); |
| 6782 | __ sll(index, index, 1); |
| 6783 | __ Addu(index, index, at); |
| 6784 | |
| 6785 | |
| 6786 | ASSERT_EQ(kSmiTagSize, 1); |
| 6787 | __ sll(index, index, 2); |
| 6788 | __ Addu(index, index, dictionary); |
| 6789 | __ lw(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| 6790 | |
| 6791 | // Having undefined at this place means the name is not contained. |
| 6792 | __ Branch(¬_in_dictionary, eq, entry_key, Operand(undefined)); |
| 6793 | |
| 6794 | // Stop if found the property. |
| 6795 | __ Branch(&in_dictionary, eq, entry_key, Operand(key)); |
| 6796 | |
| 6797 | if (i != kTotalProbes - 1 && mode_ == NEGATIVE_LOOKUP) { |
| 6798 | // Check if the entry name is not a symbol. |
| 6799 | __ lw(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| 6800 | __ lbu(entry_key, |
| 6801 | FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
| 6802 | __ And(result, entry_key, Operand(kIsSymbolMask)); |
| 6803 | __ Branch(&maybe_in_dictionary, eq, result, Operand(zero_reg)); |
| 6804 | } |
| 6805 | } |
| 6806 | |
| 6807 | __ bind(&maybe_in_dictionary); |
| 6808 | // If we are doing negative lookup then probing failure should be |
| 6809 | // treated as a lookup success. For positive lookup probing failure |
| 6810 | // should be treated as lookup failure. |
| 6811 | if (mode_ == POSITIVE_LOOKUP) { |
| 6812 | __ mov(result, zero_reg); |
| 6813 | __ Ret(); |
| 6814 | } |
| 6815 | |
| 6816 | __ bind(&in_dictionary); |
| 6817 | __ li(result, 1); |
| 6818 | __ Ret(); |
| 6819 | |
| 6820 | __ bind(¬_in_dictionary); |
| 6821 | __ mov(result, zero_reg); |
| 6822 | __ Ret(); |
lrn@chromium.org | 7516f05 | 2011-03-30 08:52:27 +0000 | [diff] [blame] | 6823 | } |
| 6824 | |
| 6825 | |
| 6826 | #undef __ |
| 6827 | |
| 6828 | } } // namespace v8::internal |
| 6829 | |
| 6830 | #endif // V8_TARGET_ARCH_MIPS |