Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_ARM64 |
| 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/code-stubs.h" |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 8 | #include "src/api-arguments.h" |
| 9 | #include "src/bootstrapper.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 10 | #include "src/codegen.h" |
| 11 | #include "src/ic/handler-compiler.h" |
| 12 | #include "src/ic/ic.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 13 | #include "src/ic/stub-cache.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 14 | #include "src/isolate.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 15 | #include "src/regexp/jsregexp.h" |
| 16 | #include "src/regexp/regexp-macro-assembler.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 17 | #include "src/runtime/runtime.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 18 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 19 | #include "src/arm64/code-stubs-arm64.h" |
| 20 | #include "src/arm64/frames-arm64.h" |
| 21 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 22 | namespace v8 { |
| 23 | namespace internal { |
| 24 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 25 | #define __ ACCESS_MASM(masm) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 26 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 27 | void ArrayNArgumentsConstructorStub::Generate(MacroAssembler* masm) { |
| 28 | __ Mov(x5, Operand(x0, LSL, kPointerSizeLog2)); |
| 29 | __ Str(x1, MemOperand(jssp, x5)); |
| 30 | __ Push(x1); |
| 31 | __ Push(x2); |
| 32 | __ Add(x0, x0, Operand(3)); |
| 33 | __ TailCallRuntime(Runtime::kNewArray); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 34 | } |
| 35 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 36 | void FastArrayPushStub::InitializeDescriptor(CodeStubDescriptor* descriptor) { |
| 37 | Address deopt_handler = Runtime::FunctionForId(Runtime::kArrayPush)->entry; |
| 38 | descriptor->Initialize(x0, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
| 39 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 40 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 41 | void FastFunctionBindStub::InitializeDescriptor( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 42 | CodeStubDescriptor* descriptor) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 43 | Address deopt_handler = Runtime::FunctionForId(Runtime::kFunctionBind)->entry; |
| 44 | descriptor->Initialize(x0, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 47 | void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm, |
| 48 | ExternalReference miss) { |
| 49 | // Update the static counter each time a new code stub is generated. |
| 50 | isolate()->counters()->code_stubs()->Increment(); |
| 51 | |
| 52 | CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 53 | int param_count = descriptor.GetRegisterParameterCount(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 54 | { |
| 55 | // Call the runtime system in a fresh internal frame. |
| 56 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 57 | DCHECK((param_count == 0) || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 58 | x0.Is(descriptor.GetRegisterParameter(param_count - 1))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 59 | |
| 60 | // Push arguments |
| 61 | MacroAssembler::PushPopQueue queue(masm); |
| 62 | for (int i = 0; i < param_count; ++i) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 63 | queue.Queue(descriptor.GetRegisterParameter(i)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 64 | } |
| 65 | queue.PushQueued(); |
| 66 | |
| 67 | __ CallExternalReference(miss, param_count); |
| 68 | } |
| 69 | |
| 70 | __ Ret(); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | void DoubleToIStub::Generate(MacroAssembler* masm) { |
| 75 | Label done; |
| 76 | Register input = source(); |
| 77 | Register result = destination(); |
| 78 | DCHECK(is_truncating()); |
| 79 | |
| 80 | DCHECK(result.Is64Bits()); |
| 81 | DCHECK(jssp.Is(masm->StackPointer())); |
| 82 | |
| 83 | int double_offset = offset(); |
| 84 | |
| 85 | DoubleRegister double_scratch = d0; // only used if !skip_fastpath() |
| 86 | Register scratch1 = GetAllocatableRegisterThatIsNotOneOf(input, result); |
| 87 | Register scratch2 = |
| 88 | GetAllocatableRegisterThatIsNotOneOf(input, result, scratch1); |
| 89 | |
| 90 | __ Push(scratch1, scratch2); |
| 91 | // Account for saved regs if input is jssp. |
| 92 | if (input.is(jssp)) double_offset += 2 * kPointerSize; |
| 93 | |
| 94 | if (!skip_fastpath()) { |
| 95 | __ Push(double_scratch); |
| 96 | if (input.is(jssp)) double_offset += 1 * kDoubleSize; |
| 97 | __ Ldr(double_scratch, MemOperand(input, double_offset)); |
| 98 | // Try to convert with a FPU convert instruction. This handles all |
| 99 | // non-saturating cases. |
| 100 | __ TryConvertDoubleToInt64(result, double_scratch, &done); |
| 101 | __ Fmov(result, double_scratch); |
| 102 | } else { |
| 103 | __ Ldr(result, MemOperand(input, double_offset)); |
| 104 | } |
| 105 | |
| 106 | // If we reach here we need to manually convert the input to an int32. |
| 107 | |
| 108 | // Extract the exponent. |
| 109 | Register exponent = scratch1; |
| 110 | __ Ubfx(exponent, result, HeapNumber::kMantissaBits, |
| 111 | HeapNumber::kExponentBits); |
| 112 | |
| 113 | // It the exponent is >= 84 (kMantissaBits + 32), the result is always 0 since |
| 114 | // the mantissa gets shifted completely out of the int32_t result. |
| 115 | __ Cmp(exponent, HeapNumber::kExponentBias + HeapNumber::kMantissaBits + 32); |
| 116 | __ CzeroX(result, ge); |
| 117 | __ B(ge, &done); |
| 118 | |
| 119 | // The Fcvtzs sequence handles all cases except where the conversion causes |
| 120 | // signed overflow in the int64_t target. Since we've already handled |
| 121 | // exponents >= 84, we can guarantee that 63 <= exponent < 84. |
| 122 | |
| 123 | if (masm->emit_debug_code()) { |
| 124 | __ Cmp(exponent, HeapNumber::kExponentBias + 63); |
| 125 | // Exponents less than this should have been handled by the Fcvt case. |
| 126 | __ Check(ge, kUnexpectedValue); |
| 127 | } |
| 128 | |
| 129 | // Isolate the mantissa bits, and set the implicit '1'. |
| 130 | Register mantissa = scratch2; |
| 131 | __ Ubfx(mantissa, result, 0, HeapNumber::kMantissaBits); |
| 132 | __ Orr(mantissa, mantissa, 1UL << HeapNumber::kMantissaBits); |
| 133 | |
| 134 | // Negate the mantissa if necessary. |
| 135 | __ Tst(result, kXSignMask); |
| 136 | __ Cneg(mantissa, mantissa, ne); |
| 137 | |
| 138 | // Shift the mantissa bits in the correct place. We know that we have to shift |
| 139 | // it left here, because exponent >= 63 >= kMantissaBits. |
| 140 | __ Sub(exponent, exponent, |
| 141 | HeapNumber::kExponentBias + HeapNumber::kMantissaBits); |
| 142 | __ Lsl(result, mantissa, exponent); |
| 143 | |
| 144 | __ Bind(&done); |
| 145 | if (!skip_fastpath()) { |
| 146 | __ Pop(double_scratch); |
| 147 | } |
| 148 | __ Pop(scratch2, scratch1); |
| 149 | __ Ret(); |
| 150 | } |
| 151 | |
| 152 | |
| 153 | // See call site for description. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 154 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, Register left, |
| 155 | Register right, Register scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 156 | FPRegister double_scratch, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 157 | Label* slow, Condition cond) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 158 | DCHECK(!AreAliased(left, right, scratch)); |
| 159 | Label not_identical, return_equal, heap_number; |
| 160 | Register result = x0; |
| 161 | |
| 162 | __ Cmp(right, left); |
| 163 | __ B(ne, ¬_identical); |
| 164 | |
| 165 | // Test for NaN. Sadly, we can't just compare to factory::nan_value(), |
| 166 | // so we do the second best thing - test it ourselves. |
| 167 | // They are both equal and they are not both Smis so both of them are not |
| 168 | // Smis. If it's not a heap number, then return equal. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 169 | Register right_type = scratch; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 170 | if ((cond == lt) || (cond == gt)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 171 | // Call runtime on identical JSObjects. Otherwise return equal. |
| 172 | __ JumpIfObjectType(right, right_type, right_type, FIRST_JS_RECEIVER_TYPE, |
| 173 | slow, ge); |
| 174 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 175 | __ Cmp(right_type, SYMBOL_TYPE); |
| 176 | __ B(eq, slow); |
| 177 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 178 | __ Cmp(right_type, SIMD128_VALUE_TYPE); |
| 179 | __ B(eq, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 180 | } else if (cond == eq) { |
| 181 | __ JumpIfHeapNumber(right, &heap_number); |
| 182 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 183 | __ JumpIfObjectType(right, right_type, right_type, HEAP_NUMBER_TYPE, |
| 184 | &heap_number); |
| 185 | // Comparing JS objects with <=, >= is complicated. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 186 | __ Cmp(right_type, FIRST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 187 | __ B(ge, slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 188 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 189 | __ Cmp(right_type, SYMBOL_TYPE); |
| 190 | __ B(eq, slow); |
| 191 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 192 | __ Cmp(right_type, SIMD128_VALUE_TYPE); |
| 193 | __ B(eq, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 194 | // Normally here we fall through to return_equal, but undefined is |
| 195 | // special: (undefined == undefined) == true, but |
| 196 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 197 | if ((cond == le) || (cond == ge)) { |
| 198 | __ Cmp(right_type, ODDBALL_TYPE); |
| 199 | __ B(ne, &return_equal); |
| 200 | __ JumpIfNotRoot(right, Heap::kUndefinedValueRootIndex, &return_equal); |
| 201 | if (cond == le) { |
| 202 | // undefined <= undefined should fail. |
| 203 | __ Mov(result, GREATER); |
| 204 | } else { |
| 205 | // undefined >= undefined should fail. |
| 206 | __ Mov(result, LESS); |
| 207 | } |
| 208 | __ Ret(); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | __ Bind(&return_equal); |
| 213 | if (cond == lt) { |
| 214 | __ Mov(result, GREATER); // Things aren't less than themselves. |
| 215 | } else if (cond == gt) { |
| 216 | __ Mov(result, LESS); // Things aren't greater than themselves. |
| 217 | } else { |
| 218 | __ Mov(result, EQUAL); // Things are <=, >=, ==, === themselves. |
| 219 | } |
| 220 | __ Ret(); |
| 221 | |
| 222 | // Cases lt and gt have been handled earlier, and case ne is never seen, as |
| 223 | // it is handled in the parser (see Parser::ParseBinaryExpression). We are |
| 224 | // only concerned with cases ge, le and eq here. |
| 225 | if ((cond != lt) && (cond != gt)) { |
| 226 | DCHECK((cond == ge) || (cond == le) || (cond == eq)); |
| 227 | __ Bind(&heap_number); |
| 228 | // Left and right are identical pointers to a heap number object. Return |
| 229 | // non-equal if the heap number is a NaN, and equal otherwise. Comparing |
| 230 | // the number to itself will set the overflow flag iff the number is NaN. |
| 231 | __ Ldr(double_scratch, FieldMemOperand(right, HeapNumber::kValueOffset)); |
| 232 | __ Fcmp(double_scratch, double_scratch); |
| 233 | __ B(vc, &return_equal); // Not NaN, so treat as normal heap number. |
| 234 | |
| 235 | if (cond == le) { |
| 236 | __ Mov(result, GREATER); |
| 237 | } else { |
| 238 | __ Mov(result, LESS); |
| 239 | } |
| 240 | __ Ret(); |
| 241 | } |
| 242 | |
| 243 | // No fall through here. |
| 244 | if (FLAG_debug_code) { |
| 245 | __ Unreachable(); |
| 246 | } |
| 247 | |
| 248 | __ Bind(¬_identical); |
| 249 | } |
| 250 | |
| 251 | |
| 252 | // See call site for description. |
| 253 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 254 | Register left, |
| 255 | Register right, |
| 256 | Register left_type, |
| 257 | Register right_type, |
| 258 | Register scratch) { |
| 259 | DCHECK(!AreAliased(left, right, left_type, right_type, scratch)); |
| 260 | |
| 261 | if (masm->emit_debug_code()) { |
| 262 | // We assume that the arguments are not identical. |
| 263 | __ Cmp(left, right); |
| 264 | __ Assert(ne, kExpectedNonIdenticalObjects); |
| 265 | } |
| 266 | |
| 267 | // If either operand is a JS object or an oddball value, then they are not |
| 268 | // equal since their pointers are different. |
| 269 | // There is no test for undetectability in strict equality. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 270 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 271 | Label right_non_object; |
| 272 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 273 | __ Cmp(right_type, FIRST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 274 | __ B(lt, &right_non_object); |
| 275 | |
| 276 | // Return non-zero - x0 already contains a non-zero pointer. |
| 277 | DCHECK(left.is(x0) || right.is(x0)); |
| 278 | Label return_not_equal; |
| 279 | __ Bind(&return_not_equal); |
| 280 | __ Ret(); |
| 281 | |
| 282 | __ Bind(&right_non_object); |
| 283 | |
| 284 | // Check for oddballs: true, false, null, undefined. |
| 285 | __ Cmp(right_type, ODDBALL_TYPE); |
| 286 | |
| 287 | // If right is not ODDBALL, test left. Otherwise, set eq condition. |
| 288 | __ Ccmp(left_type, ODDBALL_TYPE, ZFlag, ne); |
| 289 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 290 | // If right or left is not ODDBALL, test left >= FIRST_JS_RECEIVER_TYPE. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 291 | // Otherwise, right or left is ODDBALL, so set a ge condition. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 292 | __ Ccmp(left_type, FIRST_JS_RECEIVER_TYPE, NVFlag, ne); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 293 | |
| 294 | __ B(ge, &return_not_equal); |
| 295 | |
| 296 | // Internalized strings are unique, so they can only be equal if they are the |
| 297 | // same object. We have already tested that case, so if left and right are |
| 298 | // both internalized strings, they cannot be equal. |
| 299 | STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| 300 | __ Orr(scratch, left_type, right_type); |
| 301 | __ TestAndBranchIfAllClear( |
| 302 | scratch, kIsNotStringMask | kIsNotInternalizedMask, &return_not_equal); |
| 303 | } |
| 304 | |
| 305 | |
| 306 | // See call site for description. |
| 307 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 308 | Register left, |
| 309 | Register right, |
| 310 | FPRegister left_d, |
| 311 | FPRegister right_d, |
| 312 | Label* slow, |
| 313 | bool strict) { |
| 314 | DCHECK(!AreAliased(left_d, right_d)); |
| 315 | DCHECK((left.is(x0) && right.is(x1)) || |
| 316 | (right.is(x0) && left.is(x1))); |
| 317 | Register result = x0; |
| 318 | |
| 319 | Label right_is_smi, done; |
| 320 | __ JumpIfSmi(right, &right_is_smi); |
| 321 | |
| 322 | // Left is the smi. Check whether right is a heap number. |
| 323 | if (strict) { |
| 324 | // If right is not a number and left is a smi, then strict equality cannot |
| 325 | // succeed. Return non-equal. |
| 326 | Label is_heap_number; |
| 327 | __ JumpIfHeapNumber(right, &is_heap_number); |
| 328 | // Register right is a non-zero pointer, which is a valid NOT_EQUAL result. |
| 329 | if (!right.is(result)) { |
| 330 | __ Mov(result, NOT_EQUAL); |
| 331 | } |
| 332 | __ Ret(); |
| 333 | __ Bind(&is_heap_number); |
| 334 | } else { |
| 335 | // Smi compared non-strictly with a non-smi, non-heap-number. Call the |
| 336 | // runtime. |
| 337 | __ JumpIfNotHeapNumber(right, slow); |
| 338 | } |
| 339 | |
| 340 | // Left is the smi. Right is a heap number. Load right value into right_d, and |
| 341 | // convert left smi into double in left_d. |
| 342 | __ Ldr(right_d, FieldMemOperand(right, HeapNumber::kValueOffset)); |
| 343 | __ SmiUntagToDouble(left_d, left); |
| 344 | __ B(&done); |
| 345 | |
| 346 | __ Bind(&right_is_smi); |
| 347 | // Right is a smi. Check whether the non-smi left is a heap number. |
| 348 | if (strict) { |
| 349 | // If left is not a number and right is a smi then strict equality cannot |
| 350 | // succeed. Return non-equal. |
| 351 | Label is_heap_number; |
| 352 | __ JumpIfHeapNumber(left, &is_heap_number); |
| 353 | // Register left is a non-zero pointer, which is a valid NOT_EQUAL result. |
| 354 | if (!left.is(result)) { |
| 355 | __ Mov(result, NOT_EQUAL); |
| 356 | } |
| 357 | __ Ret(); |
| 358 | __ Bind(&is_heap_number); |
| 359 | } else { |
| 360 | // Smi compared non-strictly with a non-smi, non-heap-number. Call the |
| 361 | // runtime. |
| 362 | __ JumpIfNotHeapNumber(left, slow); |
| 363 | } |
| 364 | |
| 365 | // Right is the smi. Left is a heap number. Load left value into left_d, and |
| 366 | // convert right smi into double in right_d. |
| 367 | __ Ldr(left_d, FieldMemOperand(left, HeapNumber::kValueOffset)); |
| 368 | __ SmiUntagToDouble(right_d, right); |
| 369 | |
| 370 | // Fall through to both_loaded_as_doubles. |
| 371 | __ Bind(&done); |
| 372 | } |
| 373 | |
| 374 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 375 | // Fast negative check for internalized-to-internalized equality or receiver |
| 376 | // equality. Also handles the undetectable receiver to null/undefined |
| 377 | // comparison. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 378 | // See call site for description. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 379 | static void EmitCheckForInternalizedStringsOrObjects( |
| 380 | MacroAssembler* masm, Register left, Register right, Register left_map, |
| 381 | Register right_map, Register left_type, Register right_type, |
| 382 | Label* possible_strings, Label* runtime_call) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 383 | DCHECK(!AreAliased(left, right, left_map, right_map, left_type, right_type)); |
| 384 | Register result = x0; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 385 | DCHECK(left.is(x0) || right.is(x0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 386 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 387 | Label object_test, return_equal, return_unequal, undetectable; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 388 | STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| 389 | // TODO(all): reexamine this branch sequence for optimisation wrt branch |
| 390 | // prediction. |
| 391 | __ Tbnz(right_type, MaskToBit(kIsNotStringMask), &object_test); |
| 392 | __ Tbnz(right_type, MaskToBit(kIsNotInternalizedMask), possible_strings); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 393 | __ Tbnz(left_type, MaskToBit(kIsNotStringMask), runtime_call); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 394 | __ Tbnz(left_type, MaskToBit(kIsNotInternalizedMask), possible_strings); |
| 395 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 396 | // Both are internalized. We already checked they weren't the same pointer so |
| 397 | // they are not equal. Return non-equal by returning the non-zero object |
| 398 | // pointer in x0. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 399 | __ Ret(); |
| 400 | |
| 401 | __ Bind(&object_test); |
| 402 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 403 | Register left_bitfield = left_type; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 404 | Register right_bitfield = right_type; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 405 | __ Ldrb(right_bitfield, FieldMemOperand(right_map, Map::kBitFieldOffset)); |
| 406 | __ Ldrb(left_bitfield, FieldMemOperand(left_map, Map::kBitFieldOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 407 | __ Tbnz(right_bitfield, MaskToBit(1 << Map::kIsUndetectable), &undetectable); |
| 408 | __ Tbnz(left_bitfield, MaskToBit(1 << Map::kIsUndetectable), &return_unequal); |
| 409 | |
| 410 | __ CompareInstanceType(right_map, right_type, FIRST_JS_RECEIVER_TYPE); |
| 411 | __ B(lt, runtime_call); |
| 412 | __ CompareInstanceType(left_map, left_type, FIRST_JS_RECEIVER_TYPE); |
| 413 | __ B(lt, runtime_call); |
| 414 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 415 | __ Bind(&return_unequal); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 416 | // Return non-equal by returning the non-zero object pointer in x0. |
| 417 | __ Ret(); |
| 418 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 419 | __ Bind(&undetectable); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 420 | __ Tbz(left_bitfield, MaskToBit(1 << Map::kIsUndetectable), &return_unequal); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 421 | |
| 422 | // If both sides are JSReceivers, then the result is false according to |
| 423 | // the HTML specification, which says that only comparisons with null or |
| 424 | // undefined are affected by special casing for document.all. |
| 425 | __ CompareInstanceType(right_map, right_type, ODDBALL_TYPE); |
| 426 | __ B(eq, &return_equal); |
| 427 | __ CompareInstanceType(left_map, left_type, ODDBALL_TYPE); |
| 428 | __ B(ne, &return_unequal); |
| 429 | |
| 430 | __ Bind(&return_equal); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 431 | __ Mov(result, EQUAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 432 | __ Ret(); |
| 433 | } |
| 434 | |
| 435 | |
| 436 | static void CompareICStub_CheckInputType(MacroAssembler* masm, Register input, |
| 437 | CompareICState::State expected, |
| 438 | Label* fail) { |
| 439 | Label ok; |
| 440 | if (expected == CompareICState::SMI) { |
| 441 | __ JumpIfNotSmi(input, fail); |
| 442 | } else if (expected == CompareICState::NUMBER) { |
| 443 | __ JumpIfSmi(input, &ok); |
| 444 | __ JumpIfNotHeapNumber(input, fail); |
| 445 | } |
| 446 | // We could be strict about internalized/non-internalized here, but as long as |
| 447 | // hydrogen doesn't care, the stub doesn't have to care either. |
| 448 | __ Bind(&ok); |
| 449 | } |
| 450 | |
| 451 | |
| 452 | void CompareICStub::GenerateGeneric(MacroAssembler* masm) { |
| 453 | Register lhs = x1; |
| 454 | Register rhs = x0; |
| 455 | Register result = x0; |
| 456 | Condition cond = GetCondition(); |
| 457 | |
| 458 | Label miss; |
| 459 | CompareICStub_CheckInputType(masm, lhs, left(), &miss); |
| 460 | CompareICStub_CheckInputType(masm, rhs, right(), &miss); |
| 461 | |
| 462 | Label slow; // Call builtin. |
| 463 | Label not_smis, both_loaded_as_doubles; |
| 464 | Label not_two_smis, smi_done; |
| 465 | __ JumpIfEitherNotSmi(lhs, rhs, ¬_two_smis); |
| 466 | __ SmiUntag(lhs); |
| 467 | __ Sub(result, lhs, Operand::UntagSmi(rhs)); |
| 468 | __ Ret(); |
| 469 | |
| 470 | __ Bind(¬_two_smis); |
| 471 | |
| 472 | // NOTICE! This code is only reached after a smi-fast-case check, so it is |
| 473 | // certain that at least one operand isn't a smi. |
| 474 | |
| 475 | // Handle the case where the objects are identical. Either returns the answer |
| 476 | // or goes to slow. Only falls through if the objects were not identical. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 477 | EmitIdenticalObjectComparison(masm, lhs, rhs, x10, d0, &slow, cond); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 478 | |
| 479 | // If either is a smi (we know that at least one is not a smi), then they can |
| 480 | // only be strictly equal if the other is a HeapNumber. |
| 481 | __ JumpIfBothNotSmi(lhs, rhs, ¬_smis); |
| 482 | |
| 483 | // Exactly one operand is a smi. EmitSmiNonsmiComparison generates code that |
| 484 | // can: |
| 485 | // 1) Return the answer. |
| 486 | // 2) Branch to the slow case. |
| 487 | // 3) Fall through to both_loaded_as_doubles. |
| 488 | // In case 3, we have found out that we were dealing with a number-number |
| 489 | // comparison. The double values of the numbers have been loaded, right into |
| 490 | // rhs_d, left into lhs_d. |
| 491 | FPRegister rhs_d = d0; |
| 492 | FPRegister lhs_d = d1; |
| 493 | EmitSmiNonsmiComparison(masm, lhs, rhs, lhs_d, rhs_d, &slow, strict()); |
| 494 | |
| 495 | __ Bind(&both_loaded_as_doubles); |
| 496 | // The arguments have been converted to doubles and stored in rhs_d and |
| 497 | // lhs_d. |
| 498 | Label nan; |
| 499 | __ Fcmp(lhs_d, rhs_d); |
| 500 | __ B(vs, &nan); // Overflow flag set if either is NaN. |
| 501 | STATIC_ASSERT((LESS == -1) && (EQUAL == 0) && (GREATER == 1)); |
| 502 | __ Cset(result, gt); // gt => 1, otherwise (lt, eq) => 0 (EQUAL). |
| 503 | __ Csinv(result, result, xzr, ge); // lt => -1, gt => 1, eq => 0. |
| 504 | __ Ret(); |
| 505 | |
| 506 | __ Bind(&nan); |
| 507 | // Left and/or right is a NaN. Load the result register with whatever makes |
| 508 | // the comparison fail, since comparisons with NaN always fail (except ne, |
| 509 | // which is filtered out at a higher level.) |
| 510 | DCHECK(cond != ne); |
| 511 | if ((cond == lt) || (cond == le)) { |
| 512 | __ Mov(result, GREATER); |
| 513 | } else { |
| 514 | __ Mov(result, LESS); |
| 515 | } |
| 516 | __ Ret(); |
| 517 | |
| 518 | __ Bind(¬_smis); |
| 519 | // At this point we know we are dealing with two different objects, and |
| 520 | // neither of them is a smi. The objects are in rhs_ and lhs_. |
| 521 | |
| 522 | // Load the maps and types of the objects. |
| 523 | Register rhs_map = x10; |
| 524 | Register rhs_type = x11; |
| 525 | Register lhs_map = x12; |
| 526 | Register lhs_type = x13; |
| 527 | __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 528 | __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 529 | __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| 530 | __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| 531 | |
| 532 | if (strict()) { |
| 533 | // This emits a non-equal return sequence for some object types, or falls |
| 534 | // through if it was not lucky. |
| 535 | EmitStrictTwoHeapObjectCompare(masm, lhs, rhs, lhs_type, rhs_type, x14); |
| 536 | } |
| 537 | |
| 538 | Label check_for_internalized_strings; |
| 539 | Label flat_string_check; |
| 540 | // Check for heap number comparison. Branch to earlier double comparison code |
| 541 | // if they are heap numbers, otherwise, branch to internalized string check. |
| 542 | __ Cmp(rhs_type, HEAP_NUMBER_TYPE); |
| 543 | __ B(ne, &check_for_internalized_strings); |
| 544 | __ Cmp(lhs_map, rhs_map); |
| 545 | |
| 546 | // If maps aren't equal, lhs_ and rhs_ are not heap numbers. Branch to flat |
| 547 | // string check. |
| 548 | __ B(ne, &flat_string_check); |
| 549 | |
| 550 | // Both lhs_ and rhs_ are heap numbers. Load them and branch to the double |
| 551 | // comparison code. |
| 552 | __ Ldr(lhs_d, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 553 | __ Ldr(rhs_d, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 554 | __ B(&both_loaded_as_doubles); |
| 555 | |
| 556 | __ Bind(&check_for_internalized_strings); |
| 557 | // In the strict case, the EmitStrictTwoHeapObjectCompare already took care |
| 558 | // of internalized strings. |
| 559 | if ((cond == eq) && !strict()) { |
| 560 | // Returns an answer for two internalized strings or two detectable objects. |
| 561 | // Otherwise branches to the string case or not both strings case. |
| 562 | EmitCheckForInternalizedStringsOrObjects(masm, lhs, rhs, lhs_map, rhs_map, |
| 563 | lhs_type, rhs_type, |
| 564 | &flat_string_check, &slow); |
| 565 | } |
| 566 | |
| 567 | // Check for both being sequential one-byte strings, |
| 568 | // and inline if that is the case. |
| 569 | __ Bind(&flat_string_check); |
| 570 | __ JumpIfBothInstanceTypesAreNotSequentialOneByte(lhs_type, rhs_type, x14, |
| 571 | x15, &slow); |
| 572 | |
| 573 | __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, x10, |
| 574 | x11); |
| 575 | if (cond == eq) { |
| 576 | StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, x10, x11, |
| 577 | x12); |
| 578 | } else { |
| 579 | StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, x10, x11, |
| 580 | x12, x13); |
| 581 | } |
| 582 | |
| 583 | // Never fall through to here. |
| 584 | if (FLAG_debug_code) { |
| 585 | __ Unreachable(); |
| 586 | } |
| 587 | |
| 588 | __ Bind(&slow); |
| 589 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 590 | if (cond == eq) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 591 | { |
| 592 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 593 | __ Push(lhs, rhs); |
| 594 | __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual); |
| 595 | } |
| 596 | // Turn true into 0 and false into some non-zero value. |
| 597 | STATIC_ASSERT(EQUAL == 0); |
| 598 | __ LoadRoot(x1, Heap::kTrueValueRootIndex); |
| 599 | __ Sub(x0, x0, x1); |
| 600 | __ Ret(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 601 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 602 | __ Push(lhs, rhs); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 603 | int ncr; // NaN compare result |
| 604 | if ((cond == lt) || (cond == le)) { |
| 605 | ncr = GREATER; |
| 606 | } else { |
| 607 | DCHECK((cond == gt) || (cond == ge)); // remaining cases |
| 608 | ncr = LESS; |
| 609 | } |
| 610 | __ Mov(x10, Smi::FromInt(ncr)); |
| 611 | __ Push(x10); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 612 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 613 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 614 | // tagged as a small integer. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 615 | __ TailCallRuntime(Runtime::kCompare); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 616 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 617 | |
| 618 | __ Bind(&miss); |
| 619 | GenerateMiss(masm); |
| 620 | } |
| 621 | |
| 622 | |
| 623 | void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| 624 | CPURegList saved_regs = kCallerSaved; |
| 625 | CPURegList saved_fp_regs = kCallerSavedFP; |
| 626 | |
| 627 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 628 | // store the registers in any particular way, but we do have to store and |
| 629 | // restore them. |
| 630 | |
| 631 | // We don't care if MacroAssembler scratch registers are corrupted. |
| 632 | saved_regs.Remove(*(masm->TmpList())); |
| 633 | saved_fp_regs.Remove(*(masm->FPTmpList())); |
| 634 | |
| 635 | __ PushCPURegList(saved_regs); |
| 636 | if (save_doubles()) { |
| 637 | __ PushCPURegList(saved_fp_regs); |
| 638 | } |
| 639 | |
| 640 | AllowExternalCallThatCantCauseGC scope(masm); |
| 641 | __ Mov(x0, ExternalReference::isolate_address(isolate())); |
| 642 | __ CallCFunction( |
| 643 | ExternalReference::store_buffer_overflow_function(isolate()), 1, 0); |
| 644 | |
| 645 | if (save_doubles()) { |
| 646 | __ PopCPURegList(saved_fp_regs); |
| 647 | } |
| 648 | __ PopCPURegList(saved_regs); |
| 649 | __ Ret(); |
| 650 | } |
| 651 | |
| 652 | |
| 653 | void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| 654 | Isolate* isolate) { |
| 655 | StoreBufferOverflowStub stub1(isolate, kDontSaveFPRegs); |
| 656 | stub1.GetCode(); |
| 657 | StoreBufferOverflowStub stub2(isolate, kSaveFPRegs); |
| 658 | stub2.GetCode(); |
| 659 | } |
| 660 | |
| 661 | |
| 662 | void StoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| 663 | MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| 664 | UseScratchRegisterScope temps(masm); |
| 665 | Register saved_lr = temps.UnsafeAcquire(to_be_pushed_lr()); |
| 666 | Register return_address = temps.AcquireX(); |
| 667 | __ Mov(return_address, lr); |
| 668 | // Restore lr with the value it had before the call to this stub (the value |
| 669 | // which must be pushed). |
| 670 | __ Mov(lr, saved_lr); |
| 671 | __ PushSafepointRegisters(); |
| 672 | __ Ret(return_address); |
| 673 | } |
| 674 | |
| 675 | |
| 676 | void RestoreRegistersStateStub::Generate(MacroAssembler* masm) { |
| 677 | MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| 678 | UseScratchRegisterScope temps(masm); |
| 679 | Register return_address = temps.AcquireX(); |
| 680 | // Preserve the return address (lr will be clobbered by the pop). |
| 681 | __ Mov(return_address, lr); |
| 682 | __ PopSafepointRegisters(); |
| 683 | __ Ret(return_address); |
| 684 | } |
| 685 | |
| 686 | |
| 687 | void MathPowStub::Generate(MacroAssembler* masm) { |
| 688 | // Stack on entry: |
| 689 | // jssp[0]: Exponent (as a tagged value). |
| 690 | // jssp[1]: Base (as a tagged value). |
| 691 | // |
| 692 | // The (tagged) result will be returned in x0, as a heap number. |
| 693 | |
| 694 | Register result_tagged = x0; |
| 695 | Register base_tagged = x10; |
| 696 | Register exponent_tagged = MathPowTaggedDescriptor::exponent(); |
| 697 | DCHECK(exponent_tagged.is(x11)); |
| 698 | Register exponent_integer = MathPowIntegerDescriptor::exponent(); |
| 699 | DCHECK(exponent_integer.is(x12)); |
| 700 | Register scratch1 = x14; |
| 701 | Register scratch0 = x15; |
| 702 | Register saved_lr = x19; |
| 703 | FPRegister result_double = d0; |
| 704 | FPRegister base_double = d0; |
| 705 | FPRegister exponent_double = d1; |
| 706 | FPRegister base_double_copy = d2; |
| 707 | FPRegister scratch1_double = d6; |
| 708 | FPRegister scratch0_double = d7; |
| 709 | |
| 710 | // A fast-path for integer exponents. |
| 711 | Label exponent_is_smi, exponent_is_integer; |
| 712 | // Bail out to runtime. |
| 713 | Label call_runtime; |
| 714 | // Allocate a heap number for the result, and return it. |
| 715 | Label done; |
| 716 | |
| 717 | // Unpack the inputs. |
| 718 | if (exponent_type() == ON_STACK) { |
| 719 | Label base_is_smi; |
| 720 | Label unpack_exponent; |
| 721 | |
| 722 | __ Pop(exponent_tagged, base_tagged); |
| 723 | |
| 724 | __ JumpIfSmi(base_tagged, &base_is_smi); |
| 725 | __ JumpIfNotHeapNumber(base_tagged, &call_runtime); |
| 726 | // base_tagged is a heap number, so load its double value. |
| 727 | __ Ldr(base_double, FieldMemOperand(base_tagged, HeapNumber::kValueOffset)); |
| 728 | __ B(&unpack_exponent); |
| 729 | __ Bind(&base_is_smi); |
| 730 | // base_tagged is a SMI, so untag it and convert it to a double. |
| 731 | __ SmiUntagToDouble(base_double, base_tagged); |
| 732 | |
| 733 | __ Bind(&unpack_exponent); |
| 734 | // x10 base_tagged The tagged base (input). |
| 735 | // x11 exponent_tagged The tagged exponent (input). |
| 736 | // d1 base_double The base as a double. |
| 737 | __ JumpIfSmi(exponent_tagged, &exponent_is_smi); |
| 738 | __ JumpIfNotHeapNumber(exponent_tagged, &call_runtime); |
| 739 | // exponent_tagged is a heap number, so load its double value. |
| 740 | __ Ldr(exponent_double, |
| 741 | FieldMemOperand(exponent_tagged, HeapNumber::kValueOffset)); |
| 742 | } else if (exponent_type() == TAGGED) { |
| 743 | __ JumpIfSmi(exponent_tagged, &exponent_is_smi); |
| 744 | __ Ldr(exponent_double, |
| 745 | FieldMemOperand(exponent_tagged, HeapNumber::kValueOffset)); |
| 746 | } |
| 747 | |
| 748 | // Handle double (heap number) exponents. |
| 749 | if (exponent_type() != INTEGER) { |
| 750 | // Detect integer exponents stored as doubles and handle those in the |
| 751 | // integer fast-path. |
| 752 | __ TryRepresentDoubleAsInt64(exponent_integer, exponent_double, |
| 753 | scratch0_double, &exponent_is_integer); |
| 754 | |
| 755 | if (exponent_type() == ON_STACK) { |
| 756 | FPRegister half_double = d3; |
| 757 | FPRegister minus_half_double = d4; |
| 758 | // Detect square root case. Crankshaft detects constant +/-0.5 at compile |
| 759 | // time and uses DoMathPowHalf instead. We then skip this check for |
| 760 | // non-constant cases of +/-0.5 as these hardly occur. |
| 761 | |
| 762 | __ Fmov(minus_half_double, -0.5); |
| 763 | __ Fmov(half_double, 0.5); |
| 764 | __ Fcmp(minus_half_double, exponent_double); |
| 765 | __ Fccmp(half_double, exponent_double, NZFlag, ne); |
| 766 | // Condition flags at this point: |
| 767 | // 0.5; nZCv // Identified by eq && pl |
| 768 | // -0.5: NZcv // Identified by eq && mi |
| 769 | // other: ?z?? // Identified by ne |
| 770 | __ B(ne, &call_runtime); |
| 771 | |
| 772 | // The exponent is 0.5 or -0.5. |
| 773 | |
| 774 | // Given that exponent is known to be either 0.5 or -0.5, the following |
| 775 | // special cases could apply (according to ECMA-262 15.8.2.13): |
| 776 | // |
| 777 | // base.isNaN(): The result is NaN. |
| 778 | // (base == +INFINITY) || (base == -INFINITY) |
| 779 | // exponent == 0.5: The result is +INFINITY. |
| 780 | // exponent == -0.5: The result is +0. |
| 781 | // (base == +0) || (base == -0) |
| 782 | // exponent == 0.5: The result is +0. |
| 783 | // exponent == -0.5: The result is +INFINITY. |
| 784 | // (base < 0) && base.isFinite(): The result is NaN. |
| 785 | // |
| 786 | // Fsqrt (and Fdiv for the -0.5 case) can handle all of those except |
| 787 | // where base is -INFINITY or -0. |
| 788 | |
| 789 | // Add +0 to base. This has no effect other than turning -0 into +0. |
| 790 | __ Fadd(base_double, base_double, fp_zero); |
| 791 | // The operation -0+0 results in +0 in all cases except where the |
| 792 | // FPCR rounding mode is 'round towards minus infinity' (RM). The |
| 793 | // ARM64 simulator does not currently simulate FPCR (where the rounding |
| 794 | // mode is set), so test the operation with some debug code. |
| 795 | if (masm->emit_debug_code()) { |
| 796 | UseScratchRegisterScope temps(masm); |
| 797 | Register temp = temps.AcquireX(); |
| 798 | __ Fneg(scratch0_double, fp_zero); |
| 799 | // Verify that we correctly generated +0.0 and -0.0. |
| 800 | // bits(+0.0) = 0x0000000000000000 |
| 801 | // bits(-0.0) = 0x8000000000000000 |
| 802 | __ Fmov(temp, fp_zero); |
| 803 | __ CheckRegisterIsClear(temp, kCouldNotGenerateZero); |
| 804 | __ Fmov(temp, scratch0_double); |
| 805 | __ Eor(temp, temp, kDSignMask); |
| 806 | __ CheckRegisterIsClear(temp, kCouldNotGenerateNegativeZero); |
| 807 | // Check that -0.0 + 0.0 == +0.0. |
| 808 | __ Fadd(scratch0_double, scratch0_double, fp_zero); |
| 809 | __ Fmov(temp, scratch0_double); |
| 810 | __ CheckRegisterIsClear(temp, kExpectedPositiveZero); |
| 811 | } |
| 812 | |
| 813 | // If base is -INFINITY, make it +INFINITY. |
| 814 | // * Calculate base - base: All infinities will become NaNs since both |
| 815 | // -INFINITY+INFINITY and +INFINITY-INFINITY are NaN in ARM64. |
| 816 | // * If the result is NaN, calculate abs(base). |
| 817 | __ Fsub(scratch0_double, base_double, base_double); |
| 818 | __ Fcmp(scratch0_double, 0.0); |
| 819 | __ Fabs(scratch1_double, base_double); |
| 820 | __ Fcsel(base_double, scratch1_double, base_double, vs); |
| 821 | |
| 822 | // Calculate the square root of base. |
| 823 | __ Fsqrt(result_double, base_double); |
| 824 | __ Fcmp(exponent_double, 0.0); |
| 825 | __ B(ge, &done); // Finish now for exponents of 0.5. |
| 826 | // Find the inverse for exponents of -0.5. |
| 827 | __ Fmov(scratch0_double, 1.0); |
| 828 | __ Fdiv(result_double, scratch0_double, result_double); |
| 829 | __ B(&done); |
| 830 | } |
| 831 | |
| 832 | { |
| 833 | AllowExternalCallThatCantCauseGC scope(masm); |
| 834 | __ Mov(saved_lr, lr); |
| 835 | __ CallCFunction( |
| 836 | ExternalReference::power_double_double_function(isolate()), |
| 837 | 0, 2); |
| 838 | __ Mov(lr, saved_lr); |
| 839 | __ B(&done); |
| 840 | } |
| 841 | |
| 842 | // Handle SMI exponents. |
| 843 | __ Bind(&exponent_is_smi); |
| 844 | // x10 base_tagged The tagged base (input). |
| 845 | // x11 exponent_tagged The tagged exponent (input). |
| 846 | // d1 base_double The base as a double. |
| 847 | __ SmiUntag(exponent_integer, exponent_tagged); |
| 848 | } |
| 849 | |
| 850 | __ Bind(&exponent_is_integer); |
| 851 | // x10 base_tagged The tagged base (input). |
| 852 | // x11 exponent_tagged The tagged exponent (input). |
| 853 | // x12 exponent_integer The exponent as an integer. |
| 854 | // d1 base_double The base as a double. |
| 855 | |
| 856 | // Find abs(exponent). For negative exponents, we can find the inverse later. |
| 857 | Register exponent_abs = x13; |
| 858 | __ Cmp(exponent_integer, 0); |
| 859 | __ Cneg(exponent_abs, exponent_integer, mi); |
| 860 | // x13 exponent_abs The value of abs(exponent_integer). |
| 861 | |
| 862 | // Repeatedly multiply to calculate the power. |
| 863 | // result = 1.0; |
| 864 | // For each bit n (exponent_integer{n}) { |
| 865 | // if (exponent_integer{n}) { |
| 866 | // result *= base; |
| 867 | // } |
| 868 | // base *= base; |
| 869 | // if (remaining bits in exponent_integer are all zero) { |
| 870 | // break; |
| 871 | // } |
| 872 | // } |
| 873 | Label power_loop, power_loop_entry, power_loop_exit; |
| 874 | __ Fmov(scratch1_double, base_double); |
| 875 | __ Fmov(base_double_copy, base_double); |
| 876 | __ Fmov(result_double, 1.0); |
| 877 | __ B(&power_loop_entry); |
| 878 | |
| 879 | __ Bind(&power_loop); |
| 880 | __ Fmul(scratch1_double, scratch1_double, scratch1_double); |
| 881 | __ Lsr(exponent_abs, exponent_abs, 1); |
| 882 | __ Cbz(exponent_abs, &power_loop_exit); |
| 883 | |
| 884 | __ Bind(&power_loop_entry); |
| 885 | __ Tbz(exponent_abs, 0, &power_loop); |
| 886 | __ Fmul(result_double, result_double, scratch1_double); |
| 887 | __ B(&power_loop); |
| 888 | |
| 889 | __ Bind(&power_loop_exit); |
| 890 | |
| 891 | // If the exponent was positive, result_double holds the result. |
| 892 | __ Tbz(exponent_integer, kXSignBit, &done); |
| 893 | |
| 894 | // The exponent was negative, so find the inverse. |
| 895 | __ Fmov(scratch0_double, 1.0); |
| 896 | __ Fdiv(result_double, scratch0_double, result_double); |
| 897 | // ECMA-262 only requires Math.pow to return an 'implementation-dependent |
| 898 | // approximation' of base^exponent. However, mjsunit/math-pow uses Math.pow |
| 899 | // to calculate the subnormal value 2^-1074. This method of calculating |
| 900 | // negative powers doesn't work because 2^1074 overflows to infinity. To |
| 901 | // catch this corner-case, we bail out if the result was 0. (This can only |
| 902 | // occur if the divisor is infinity or the base is zero.) |
| 903 | __ Fcmp(result_double, 0.0); |
| 904 | __ B(&done, ne); |
| 905 | |
| 906 | if (exponent_type() == ON_STACK) { |
| 907 | // Bail out to runtime code. |
| 908 | __ Bind(&call_runtime); |
| 909 | // Put the arguments back on the stack. |
| 910 | __ Push(base_tagged, exponent_tagged); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 911 | __ TailCallRuntime(Runtime::kMathPowRT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 912 | |
| 913 | // Return. |
| 914 | __ Bind(&done); |
| 915 | __ AllocateHeapNumber(result_tagged, &call_runtime, scratch0, scratch1, |
| 916 | result_double); |
| 917 | DCHECK(result_tagged.is(x0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 918 | __ Ret(); |
| 919 | } else { |
| 920 | AllowExternalCallThatCantCauseGC scope(masm); |
| 921 | __ Mov(saved_lr, lr); |
| 922 | __ Fmov(base_double, base_double_copy); |
| 923 | __ Scvtf(exponent_double, exponent_integer); |
| 924 | __ CallCFunction( |
| 925 | ExternalReference::power_double_double_function(isolate()), |
| 926 | 0, 2); |
| 927 | __ Mov(lr, saved_lr); |
| 928 | __ Bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 929 | __ Ret(); |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | |
| 934 | void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 935 | // It is important that the following stubs are generated in this order |
| 936 | // because pregenerated stubs can only call other pregenerated stubs. |
| 937 | // RecordWriteStub uses StoreBufferOverflowStub, which in turn uses |
| 938 | // CEntryStub. |
| 939 | CEntryStub::GenerateAheadOfTime(isolate); |
| 940 | StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| 941 | StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 942 | CommonArrayConstructorStub::GenerateStubsAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 943 | CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 944 | CreateWeakCellStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 945 | BinaryOpICStub::GenerateAheadOfTime(isolate); |
| 946 | StoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| 947 | RestoreRegistersStateStub::GenerateAheadOfTime(isolate); |
| 948 | BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 949 | StoreFastElementStub::GenerateAheadOfTime(isolate); |
| 950 | TypeofStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | |
| 954 | void StoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| 955 | StoreRegistersStateStub stub(isolate); |
| 956 | stub.GetCode(); |
| 957 | } |
| 958 | |
| 959 | |
| 960 | void RestoreRegistersStateStub::GenerateAheadOfTime(Isolate* isolate) { |
| 961 | RestoreRegistersStateStub stub(isolate); |
| 962 | stub.GetCode(); |
| 963 | } |
| 964 | |
| 965 | |
| 966 | void CodeStub::GenerateFPStubs(Isolate* isolate) { |
| 967 | // Floating-point code doesn't get special handling in ARM64, so there's |
| 968 | // nothing to do here. |
| 969 | USE(isolate); |
| 970 | } |
| 971 | |
| 972 | |
| 973 | bool CEntryStub::NeedsImmovableCode() { |
| 974 | // CEntryStub stores the return address on the stack before calling into |
| 975 | // C++ code. In some cases, the VM accesses this address, but it is not used |
| 976 | // when the C++ code returns to the stub because LR holds the return address |
| 977 | // in AAPCS64. If the stub is moved (perhaps during a GC), we could end up |
| 978 | // returning to dead code. |
| 979 | // TODO(jbramley): Whilst this is the only analysis that makes sense, I can't |
| 980 | // find any comment to confirm this, and I don't hit any crashes whatever |
| 981 | // this function returns. The anaylsis should be properly confirmed. |
| 982 | return true; |
| 983 | } |
| 984 | |
| 985 | |
| 986 | void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
| 987 | CEntryStub stub(isolate, 1, kDontSaveFPRegs); |
| 988 | stub.GetCode(); |
| 989 | CEntryStub stub_fp(isolate, 1, kSaveFPRegs); |
| 990 | stub_fp.GetCode(); |
| 991 | } |
| 992 | |
| 993 | |
| 994 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 995 | // The Abort mechanism relies on CallRuntime, which in turn relies on |
| 996 | // CEntryStub, so until this stub has been generated, we have to use a |
| 997 | // fall-back Abort mechanism. |
| 998 | // |
| 999 | // Note that this stub must be generated before any use of Abort. |
| 1000 | MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| 1001 | |
| 1002 | ASM_LOCATION("CEntryStub::Generate entry"); |
| 1003 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1004 | |
| 1005 | // Register parameters: |
| 1006 | // x0: argc (including receiver, untagged) |
| 1007 | // x1: target |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1008 | // If argv_in_register(): |
| 1009 | // x11: argv (pointer to first argument) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1010 | // |
| 1011 | // The stack on entry holds the arguments and the receiver, with the receiver |
| 1012 | // at the highest address: |
| 1013 | // |
| 1014 | // jssp]argc-1]: receiver |
| 1015 | // jssp[argc-2]: arg[argc-2] |
| 1016 | // ... ... |
| 1017 | // jssp[1]: arg[1] |
| 1018 | // jssp[0]: arg[0] |
| 1019 | // |
| 1020 | // The arguments are in reverse order, so that arg[argc-2] is actually the |
| 1021 | // first argument to the target function and arg[0] is the last. |
| 1022 | DCHECK(jssp.Is(__ StackPointer())); |
| 1023 | const Register& argc_input = x0; |
| 1024 | const Register& target_input = x1; |
| 1025 | |
| 1026 | // Calculate argv, argc and the target address, and store them in |
| 1027 | // callee-saved registers so we can retry the call without having to reload |
| 1028 | // these arguments. |
| 1029 | // TODO(jbramley): If the first call attempt succeeds in the common case (as |
| 1030 | // it should), then we might be better off putting these parameters directly |
| 1031 | // into their argument registers, rather than using callee-saved registers and |
| 1032 | // preserving them on the stack. |
| 1033 | const Register& argv = x21; |
| 1034 | const Register& argc = x22; |
| 1035 | const Register& target = x23; |
| 1036 | |
| 1037 | // Derive argv from the stack pointer so that it points to the first argument |
| 1038 | // (arg[argc-2]), or just below the receiver in case there are no arguments. |
| 1039 | // - Adjust for the arg[] array. |
| 1040 | Register temp_argv = x11; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1041 | if (!argv_in_register()) { |
| 1042 | __ Add(temp_argv, jssp, Operand(x0, LSL, kPointerSizeLog2)); |
| 1043 | // - Adjust for the receiver. |
| 1044 | __ Sub(temp_argv, temp_argv, 1 * kPointerSize); |
| 1045 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1046 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1047 | // Reserve three slots to preserve x21-x23 callee-saved registers. If the |
| 1048 | // result size is too large to be returned in registers then also reserve |
| 1049 | // space for the return value. |
| 1050 | int extra_stack_space = 3 + (result_size() <= 2 ? 0 : result_size()); |
| 1051 | // Enter the exit frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1052 | FrameScope scope(masm, StackFrame::MANUAL); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1053 | __ EnterExitFrame(save_doubles(), x10, extra_stack_space); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1054 | DCHECK(csp.Is(__ StackPointer())); |
| 1055 | |
| 1056 | // Poke callee-saved registers into reserved space. |
| 1057 | __ Poke(argv, 1 * kPointerSize); |
| 1058 | __ Poke(argc, 2 * kPointerSize); |
| 1059 | __ Poke(target, 3 * kPointerSize); |
| 1060 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1061 | if (result_size() > 2) { |
| 1062 | // Save the location of the return value into x8 for call. |
| 1063 | __ Add(x8, __ StackPointer(), Operand(4 * kPointerSize)); |
| 1064 | } |
| 1065 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1066 | // We normally only keep tagged values in callee-saved registers, as they |
| 1067 | // could be pushed onto the stack by called stubs and functions, and on the |
| 1068 | // stack they can confuse the GC. However, we're only calling C functions |
| 1069 | // which can push arbitrary data onto the stack anyway, and so the GC won't |
| 1070 | // examine that part of the stack. |
| 1071 | __ Mov(argc, argc_input); |
| 1072 | __ Mov(target, target_input); |
| 1073 | __ Mov(argv, temp_argv); |
| 1074 | |
| 1075 | // x21 : argv |
| 1076 | // x22 : argc |
| 1077 | // x23 : call target |
| 1078 | // |
| 1079 | // The stack (on entry) holds the arguments and the receiver, with the |
| 1080 | // receiver at the highest address: |
| 1081 | // |
| 1082 | // argv[8]: receiver |
| 1083 | // argv -> argv[0]: arg[argc-2] |
| 1084 | // ... ... |
| 1085 | // argv[...]: arg[1] |
| 1086 | // argv[...]: arg[0] |
| 1087 | // |
| 1088 | // Immediately below (after) this is the exit frame, as constructed by |
| 1089 | // EnterExitFrame: |
| 1090 | // fp[8]: CallerPC (lr) |
| 1091 | // fp -> fp[0]: CallerFP (old fp) |
| 1092 | // fp[-8]: Space reserved for SPOffset. |
| 1093 | // fp[-16]: CodeObject() |
| 1094 | // csp[...]: Saved doubles, if saved_doubles is true. |
| 1095 | // csp[32]: Alignment padding, if necessary. |
| 1096 | // csp[24]: Preserved x23 (used for target). |
| 1097 | // csp[16]: Preserved x22 (used for argc). |
| 1098 | // csp[8]: Preserved x21 (used for argv). |
| 1099 | // csp -> csp[0]: Space reserved for the return address. |
| 1100 | // |
| 1101 | // After a successful call, the exit frame, preserved registers (x21-x23) and |
| 1102 | // the arguments (including the receiver) are dropped or popped as |
| 1103 | // appropriate. The stub then returns. |
| 1104 | // |
| 1105 | // After an unsuccessful call, the exit frame and suchlike are left |
| 1106 | // untouched, and the stub either throws an exception by jumping to one of |
| 1107 | // the exception_returned label. |
| 1108 | |
| 1109 | DCHECK(csp.Is(__ StackPointer())); |
| 1110 | |
| 1111 | // Prepare AAPCS64 arguments to pass to the builtin. |
| 1112 | __ Mov(x0, argc); |
| 1113 | __ Mov(x1, argv); |
| 1114 | __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| 1115 | |
| 1116 | Label return_location; |
| 1117 | __ Adr(x12, &return_location); |
| 1118 | __ Poke(x12, 0); |
| 1119 | |
| 1120 | if (__ emit_debug_code()) { |
| 1121 | // Verify that the slot below fp[kSPOffset]-8 points to the return location |
| 1122 | // (currently in x12). |
| 1123 | UseScratchRegisterScope temps(masm); |
| 1124 | Register temp = temps.AcquireX(); |
| 1125 | __ Ldr(temp, MemOperand(fp, ExitFrameConstants::kSPOffset)); |
| 1126 | __ Ldr(temp, MemOperand(temp, -static_cast<int64_t>(kXRegSize))); |
| 1127 | __ Cmp(temp, x12); |
| 1128 | __ Check(eq, kReturnAddressNotFoundInFrame); |
| 1129 | } |
| 1130 | |
| 1131 | // Call the builtin. |
| 1132 | __ Blr(target); |
| 1133 | __ Bind(&return_location); |
| 1134 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1135 | if (result_size() > 2) { |
| 1136 | DCHECK_EQ(3, result_size()); |
| 1137 | // Read result values stored on stack. |
| 1138 | __ Ldr(x0, MemOperand(__ StackPointer(), 4 * kPointerSize)); |
| 1139 | __ Ldr(x1, MemOperand(__ StackPointer(), 5 * kPointerSize)); |
| 1140 | __ Ldr(x2, MemOperand(__ StackPointer(), 6 * kPointerSize)); |
| 1141 | } |
| 1142 | // Result returned in x0, x1:x0 or x2:x1:x0 - do not destroy these registers! |
| 1143 | |
| 1144 | // x0 result0 The return code from the call. |
| 1145 | // x1 result1 For calls which return ObjectPair or ObjectTriple. |
| 1146 | // x2 result2 For calls which return ObjectTriple. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1147 | // x21 argv |
| 1148 | // x22 argc |
| 1149 | // x23 target |
| 1150 | const Register& result = x0; |
| 1151 | |
| 1152 | // Check result for exception sentinel. |
| 1153 | Label exception_returned; |
| 1154 | __ CompareRoot(result, Heap::kExceptionRootIndex); |
| 1155 | __ B(eq, &exception_returned); |
| 1156 | |
| 1157 | // The call succeeded, so unwind the stack and return. |
| 1158 | |
| 1159 | // Restore callee-saved registers x21-x23. |
| 1160 | __ Mov(x11, argc); |
| 1161 | |
| 1162 | __ Peek(argv, 1 * kPointerSize); |
| 1163 | __ Peek(argc, 2 * kPointerSize); |
| 1164 | __ Peek(target, 3 * kPointerSize); |
| 1165 | |
| 1166 | __ LeaveExitFrame(save_doubles(), x10, true); |
| 1167 | DCHECK(jssp.Is(__ StackPointer())); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1168 | if (!argv_in_register()) { |
| 1169 | // Drop the remaining stack slots and return from the stub. |
| 1170 | __ Drop(x11); |
| 1171 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1172 | __ AssertFPCRState(); |
| 1173 | __ Ret(); |
| 1174 | |
| 1175 | // The stack pointer is still csp if we aren't returning, and the frame |
| 1176 | // hasn't changed (except for the return address). |
| 1177 | __ SetStackPointer(csp); |
| 1178 | |
| 1179 | // Handling of exception. |
| 1180 | __ Bind(&exception_returned); |
| 1181 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1182 | ExternalReference pending_handler_context_address( |
| 1183 | Isolate::kPendingHandlerContextAddress, isolate()); |
| 1184 | ExternalReference pending_handler_code_address( |
| 1185 | Isolate::kPendingHandlerCodeAddress, isolate()); |
| 1186 | ExternalReference pending_handler_offset_address( |
| 1187 | Isolate::kPendingHandlerOffsetAddress, isolate()); |
| 1188 | ExternalReference pending_handler_fp_address( |
| 1189 | Isolate::kPendingHandlerFPAddress, isolate()); |
| 1190 | ExternalReference pending_handler_sp_address( |
| 1191 | Isolate::kPendingHandlerSPAddress, isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1192 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1193 | // Ask the runtime for help to determine the handler. This will set x0 to |
| 1194 | // contain the current pending exception, don't clobber it. |
| 1195 | ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler, |
| 1196 | isolate()); |
| 1197 | DCHECK(csp.Is(masm->StackPointer())); |
| 1198 | { |
| 1199 | FrameScope scope(masm, StackFrame::MANUAL); |
| 1200 | __ Mov(x0, 0); // argc. |
| 1201 | __ Mov(x1, 0); // argv. |
| 1202 | __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| 1203 | __ CallCFunction(find_handler, 3); |
| 1204 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1205 | |
| 1206 | // We didn't execute a return case, so the stack frame hasn't been updated |
| 1207 | // (except for the return address slot). However, we don't need to initialize |
| 1208 | // jssp because the throw method will immediately overwrite it when it |
| 1209 | // unwinds the stack. |
| 1210 | __ SetStackPointer(jssp); |
| 1211 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1212 | // Retrieve the handler context, SP and FP. |
| 1213 | __ Mov(cp, Operand(pending_handler_context_address)); |
| 1214 | __ Ldr(cp, MemOperand(cp)); |
| 1215 | __ Mov(jssp, Operand(pending_handler_sp_address)); |
| 1216 | __ Ldr(jssp, MemOperand(jssp)); |
| 1217 | __ Mov(fp, Operand(pending_handler_fp_address)); |
| 1218 | __ Ldr(fp, MemOperand(fp)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1219 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1220 | // If the handler is a JS frame, restore the context to the frame. Note that |
| 1221 | // the context will be set to (cp == 0) for non-JS frames. |
| 1222 | Label not_js_frame; |
| 1223 | __ Cbz(cp, ¬_js_frame); |
| 1224 | __ Str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 1225 | __ Bind(¬_js_frame); |
| 1226 | |
| 1227 | // Compute the handler entry address and jump to it. |
| 1228 | __ Mov(x10, Operand(pending_handler_code_address)); |
| 1229 | __ Ldr(x10, MemOperand(x10)); |
| 1230 | __ Mov(x11, Operand(pending_handler_offset_address)); |
| 1231 | __ Ldr(x11, MemOperand(x11)); |
| 1232 | __ Add(x10, x10, Code::kHeaderSize - kHeapObjectTag); |
| 1233 | __ Add(x10, x10, x11); |
| 1234 | __ Br(x10); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | // This is the entry point from C++. 5 arguments are provided in x0-x4. |
| 1239 | // See use of the CALL_GENERATED_CODE macro for example in src/execution.cc. |
| 1240 | // Input: |
| 1241 | // x0: code entry. |
| 1242 | // x1: function. |
| 1243 | // x2: receiver. |
| 1244 | // x3: argc. |
| 1245 | // x4: argv. |
| 1246 | // Output: |
| 1247 | // x0: result. |
| 1248 | void JSEntryStub::Generate(MacroAssembler* masm) { |
| 1249 | DCHECK(jssp.Is(__ StackPointer())); |
| 1250 | Register code_entry = x0; |
| 1251 | |
| 1252 | // Enable instruction instrumentation. This only works on the simulator, and |
| 1253 | // will have no effect on the model or real hardware. |
| 1254 | __ EnableInstrumentation(); |
| 1255 | |
| 1256 | Label invoke, handler_entry, exit; |
| 1257 | |
| 1258 | // Push callee-saved registers and synchronize the system stack pointer (csp) |
| 1259 | // and the JavaScript stack pointer (jssp). |
| 1260 | // |
| 1261 | // We must not write to jssp until after the PushCalleeSavedRegisters() |
| 1262 | // call, since jssp is itself a callee-saved register. |
| 1263 | __ SetStackPointer(csp); |
| 1264 | __ PushCalleeSavedRegisters(); |
| 1265 | __ Mov(jssp, csp); |
| 1266 | __ SetStackPointer(jssp); |
| 1267 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1268 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1269 | |
| 1270 | // Set up the reserved register for 0.0. |
| 1271 | __ Fmov(fp_zero, 0.0); |
| 1272 | |
| 1273 | // Build an entry frame (see layout below). |
| 1274 | int marker = type(); |
| 1275 | int64_t bad_frame_pointer = -1L; // Bad frame pointer to fail if it is used. |
| 1276 | __ Mov(x13, bad_frame_pointer); |
| 1277 | __ Mov(x12, Smi::FromInt(marker)); |
| 1278 | __ Mov(x11, ExternalReference(Isolate::kCEntryFPAddress, isolate())); |
| 1279 | __ Ldr(x10, MemOperand(x11)); |
| 1280 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1281 | __ Push(x13, x12, xzr, x10); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1282 | // Set up fp. |
| 1283 | __ Sub(fp, jssp, EntryFrameConstants::kCallerFPOffset); |
| 1284 | |
| 1285 | // Push the JS entry frame marker. Also set js_entry_sp if this is the |
| 1286 | // outermost JS call. |
| 1287 | Label non_outermost_js, done; |
| 1288 | ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate()); |
| 1289 | __ Mov(x10, ExternalReference(js_entry_sp)); |
| 1290 | __ Ldr(x11, MemOperand(x10)); |
| 1291 | __ Cbnz(x11, &non_outermost_js); |
| 1292 | __ Str(fp, MemOperand(x10)); |
| 1293 | __ Mov(x12, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| 1294 | __ Push(x12); |
| 1295 | __ B(&done); |
| 1296 | __ Bind(&non_outermost_js); |
| 1297 | // We spare one instruction by pushing xzr since the marker is 0. |
| 1298 | DCHECK(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME) == NULL); |
| 1299 | __ Push(xzr); |
| 1300 | __ Bind(&done); |
| 1301 | |
| 1302 | // The frame set up looks like this: |
| 1303 | // jssp[0] : JS entry frame marker. |
| 1304 | // jssp[1] : C entry FP. |
| 1305 | // jssp[2] : stack frame marker. |
| 1306 | // jssp[3] : stack frmae marker. |
| 1307 | // jssp[4] : bad frame pointer 0xfff...ff <- fp points here. |
| 1308 | |
| 1309 | |
| 1310 | // Jump to a faked try block that does the invoke, with a faked catch |
| 1311 | // block that sets the pending exception. |
| 1312 | __ B(&invoke); |
| 1313 | |
| 1314 | // Prevent the constant pool from being emitted between the record of the |
| 1315 | // handler_entry position and the first instruction of the sequence here. |
| 1316 | // There is no risk because Assembler::Emit() emits the instruction before |
| 1317 | // checking for constant pool emission, but we do not want to depend on |
| 1318 | // that. |
| 1319 | { |
| 1320 | Assembler::BlockPoolsScope block_pools(masm); |
| 1321 | __ bind(&handler_entry); |
| 1322 | handler_offset_ = handler_entry.pos(); |
| 1323 | // Caught exception: Store result (exception) in the pending exception |
| 1324 | // field in the JSEnv and return a failure sentinel. Coming in here the |
| 1325 | // fp will be invalid because the PushTryHandler below sets it to 0 to |
| 1326 | // signal the existence of the JSEntry frame. |
| 1327 | __ Mov(x10, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1328 | isolate()))); |
| 1329 | } |
| 1330 | __ Str(code_entry, MemOperand(x10)); |
| 1331 | __ LoadRoot(x0, Heap::kExceptionRootIndex); |
| 1332 | __ B(&exit); |
| 1333 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1334 | // Invoke: Link this frame into the handler chain. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1335 | __ Bind(&invoke); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1336 | __ PushStackHandler(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1337 | // If an exception not caught by another handler occurs, this handler |
| 1338 | // returns control to the code after the B(&invoke) above, which |
| 1339 | // restores all callee-saved registers (including cp and fp) to their |
| 1340 | // saved values before returning a failure to C. |
| 1341 | |
| 1342 | // Clear any pending exceptions. |
| 1343 | __ Mov(x10, Operand(isolate()->factory()->the_hole_value())); |
| 1344 | __ Mov(x11, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1345 | isolate()))); |
| 1346 | __ Str(x10, MemOperand(x11)); |
| 1347 | |
| 1348 | // Invoke the function by calling through the JS entry trampoline builtin. |
| 1349 | // Notice that we cannot store a reference to the trampoline code directly in |
| 1350 | // this stub, because runtime stubs are not traversed when doing GC. |
| 1351 | |
| 1352 | // Expected registers by Builtins::JSEntryTrampoline |
| 1353 | // x0: code entry. |
| 1354 | // x1: function. |
| 1355 | // x2: receiver. |
| 1356 | // x3: argc. |
| 1357 | // x4: argv. |
| 1358 | ExternalReference entry(type() == StackFrame::ENTRY_CONSTRUCT |
| 1359 | ? Builtins::kJSConstructEntryTrampoline |
| 1360 | : Builtins::kJSEntryTrampoline, |
| 1361 | isolate()); |
| 1362 | __ Mov(x10, entry); |
| 1363 | |
| 1364 | // Call the JSEntryTrampoline. |
| 1365 | __ Ldr(x11, MemOperand(x10)); // Dereference the address. |
| 1366 | __ Add(x12, x11, Code::kHeaderSize - kHeapObjectTag); |
| 1367 | __ Blr(x12); |
| 1368 | |
| 1369 | // Unlink this frame from the handler chain. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1370 | __ PopStackHandler(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1371 | |
| 1372 | |
| 1373 | __ Bind(&exit); |
| 1374 | // x0 holds the result. |
| 1375 | // The stack pointer points to the top of the entry frame pushed on entry from |
| 1376 | // C++ (at the beginning of this stub): |
| 1377 | // jssp[0] : JS entry frame marker. |
| 1378 | // jssp[1] : C entry FP. |
| 1379 | // jssp[2] : stack frame marker. |
| 1380 | // jssp[3] : stack frmae marker. |
| 1381 | // jssp[4] : bad frame pointer 0xfff...ff <- fp points here. |
| 1382 | |
| 1383 | // Check if the current stack frame is marked as the outermost JS frame. |
| 1384 | Label non_outermost_js_2; |
| 1385 | __ Pop(x10); |
| 1386 | __ Cmp(x10, Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME)); |
| 1387 | __ B(ne, &non_outermost_js_2); |
| 1388 | __ Mov(x11, ExternalReference(js_entry_sp)); |
| 1389 | __ Str(xzr, MemOperand(x11)); |
| 1390 | __ Bind(&non_outermost_js_2); |
| 1391 | |
| 1392 | // Restore the top frame descriptors from the stack. |
| 1393 | __ Pop(x10); |
| 1394 | __ Mov(x11, ExternalReference(Isolate::kCEntryFPAddress, isolate())); |
| 1395 | __ Str(x10, MemOperand(x11)); |
| 1396 | |
| 1397 | // Reset the stack to the callee saved registers. |
| 1398 | __ Drop(-EntryFrameConstants::kCallerFPOffset, kByteSizeInBytes); |
| 1399 | // Restore the callee-saved registers and return. |
| 1400 | DCHECK(jssp.Is(__ StackPointer())); |
| 1401 | __ Mov(csp, jssp); |
| 1402 | __ SetStackPointer(csp); |
| 1403 | __ PopCalleeSavedRegisters(); |
| 1404 | // After this point, we must not modify jssp because it is a callee-saved |
| 1405 | // register which we have just restored. |
| 1406 | __ Ret(); |
| 1407 | } |
| 1408 | |
| 1409 | |
| 1410 | void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| 1411 | Label miss; |
| 1412 | Register receiver = LoadDescriptor::ReceiverRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1413 | // Ensure that the vector and slot registers won't be clobbered before |
| 1414 | // calling the miss handler. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1415 | DCHECK(!AreAliased(x10, x11, LoadWithVectorDescriptor::VectorRegister(), |
| 1416 | LoadWithVectorDescriptor::SlotRegister())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1417 | |
| 1418 | NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, x10, |
| 1419 | x11, &miss); |
| 1420 | |
| 1421 | __ Bind(&miss); |
| 1422 | PropertyAccessCompiler::TailCallBuiltin( |
| 1423 | masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC)); |
| 1424 | } |
| 1425 | |
| 1426 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1427 | void LoadIndexedStringStub::Generate(MacroAssembler* masm) { |
| 1428 | // Return address is in lr. |
| 1429 | Label miss; |
| 1430 | |
| 1431 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 1432 | Register index = LoadDescriptor::NameRegister(); |
| 1433 | Register result = x0; |
| 1434 | Register scratch = x10; |
| 1435 | DCHECK(!scratch.is(receiver) && !scratch.is(index)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1436 | DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) && |
| 1437 | result.is(LoadWithVectorDescriptor::SlotRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1438 | |
| 1439 | // StringCharAtGenerator doesn't use the result register until it's passed |
| 1440 | // the different miss possibilities. If it did, we would have a conflict |
| 1441 | // when FLAG_vector_ics is true. |
| 1442 | StringCharAtGenerator char_at_generator(receiver, index, scratch, result, |
| 1443 | &miss, // When not a string. |
| 1444 | &miss, // When not a number. |
| 1445 | &miss, // When index out of range. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1446 | RECEIVER_IS_STRING); |
| 1447 | char_at_generator.GenerateFast(masm); |
| 1448 | __ Ret(); |
| 1449 | |
| 1450 | StubRuntimeCallHelper call_helper; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1451 | char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1452 | |
| 1453 | __ Bind(&miss); |
| 1454 | PropertyAccessCompiler::TailCallBuiltin( |
| 1455 | masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| 1456 | } |
| 1457 | |
| 1458 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1459 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 1460 | #ifdef V8_INTERPRETED_REGEXP |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1461 | __ TailCallRuntime(Runtime::kRegExpExec); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1462 | #else // V8_INTERPRETED_REGEXP |
| 1463 | |
| 1464 | // Stack frame on entry. |
| 1465 | // jssp[0]: last_match_info (expected JSArray) |
| 1466 | // jssp[8]: previous index |
| 1467 | // jssp[16]: subject string |
| 1468 | // jssp[24]: JSRegExp object |
| 1469 | Label runtime; |
| 1470 | |
| 1471 | // Use of registers for this function. |
| 1472 | |
| 1473 | // Variable registers: |
| 1474 | // x10-x13 used as scratch registers |
| 1475 | // w0 string_type type of subject string |
| 1476 | // x2 jsstring_length subject string length |
| 1477 | // x3 jsregexp_object JSRegExp object |
| 1478 | // w4 string_encoding Latin1 or UC16 |
| 1479 | // w5 sliced_string_offset if the string is a SlicedString |
| 1480 | // offset to the underlying string |
| 1481 | // w6 string_representation groups attributes of the string: |
| 1482 | // - is a string |
| 1483 | // - type of the string |
| 1484 | // - is a short external string |
| 1485 | Register string_type = w0; |
| 1486 | Register jsstring_length = x2; |
| 1487 | Register jsregexp_object = x3; |
| 1488 | Register string_encoding = w4; |
| 1489 | Register sliced_string_offset = w5; |
| 1490 | Register string_representation = w6; |
| 1491 | |
| 1492 | // These are in callee save registers and will be preserved by the call |
| 1493 | // to the native RegExp code, as this code is called using the normal |
| 1494 | // C calling convention. When calling directly from generated code the |
| 1495 | // native RegExp code will not do a GC and therefore the content of |
| 1496 | // these registers are safe to use after the call. |
| 1497 | |
| 1498 | // x19 subject subject string |
| 1499 | // x20 regexp_data RegExp data (FixedArray) |
| 1500 | // x21 last_match_info_elements info relative to the last match |
| 1501 | // (FixedArray) |
| 1502 | // x22 code_object generated regexp code |
| 1503 | Register subject = x19; |
| 1504 | Register regexp_data = x20; |
| 1505 | Register last_match_info_elements = x21; |
| 1506 | Register code_object = x22; |
| 1507 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1508 | // Stack frame. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1509 | // jssp[00]: last_match_info (JSArray) |
| 1510 | // jssp[08]: previous index |
| 1511 | // jssp[16]: subject string |
| 1512 | // jssp[24]: JSRegExp object |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1513 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1514 | const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 1515 | const int kPreviousIndexOffset = 1 * kPointerSize; |
| 1516 | const int kSubjectOffset = 2 * kPointerSize; |
| 1517 | const int kJSRegExpOffset = 3 * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1518 | |
| 1519 | // Ensure that a RegExp stack is allocated. |
| 1520 | ExternalReference address_of_regexp_stack_memory_address = |
| 1521 | ExternalReference::address_of_regexp_stack_memory_address(isolate()); |
| 1522 | ExternalReference address_of_regexp_stack_memory_size = |
| 1523 | ExternalReference::address_of_regexp_stack_memory_size(isolate()); |
| 1524 | __ Mov(x10, address_of_regexp_stack_memory_size); |
| 1525 | __ Ldr(x10, MemOperand(x10)); |
| 1526 | __ Cbz(x10, &runtime); |
| 1527 | |
| 1528 | // Check that the first argument is a JSRegExp object. |
| 1529 | DCHECK(jssp.Is(__ StackPointer())); |
| 1530 | __ Peek(jsregexp_object, kJSRegExpOffset); |
| 1531 | __ JumpIfSmi(jsregexp_object, &runtime); |
| 1532 | __ JumpIfNotObjectType(jsregexp_object, x10, x10, JS_REGEXP_TYPE, &runtime); |
| 1533 | |
| 1534 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 1535 | __ Ldr(regexp_data, FieldMemOperand(jsregexp_object, JSRegExp::kDataOffset)); |
| 1536 | if (FLAG_debug_code) { |
| 1537 | STATIC_ASSERT(kSmiTag == 0); |
| 1538 | __ Tst(regexp_data, kSmiTagMask); |
| 1539 | __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
| 1540 | __ CompareObjectType(regexp_data, x10, x10, FIXED_ARRAY_TYPE); |
| 1541 | __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
| 1542 | } |
| 1543 | |
| 1544 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 1545 | __ Ldr(x10, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 1546 | __ Cmp(x10, Smi::FromInt(JSRegExp::IRREGEXP)); |
| 1547 | __ B(ne, &runtime); |
| 1548 | |
| 1549 | // Check that the number of captures fit in the static offsets vector buffer. |
| 1550 | // We have always at least one capture for the whole match, plus additional |
| 1551 | // ones due to capturing parentheses. A capture takes 2 registers. |
| 1552 | // The number of capture registers then is (number_of_captures + 1) * 2. |
| 1553 | __ Ldrsw(x10, |
| 1554 | UntagSmiFieldMemOperand(regexp_data, |
| 1555 | JSRegExp::kIrregexpCaptureCountOffset)); |
| 1556 | // Check (number_of_captures + 1) * 2 <= offsets vector size |
| 1557 | // number_of_captures * 2 <= offsets vector size - 2 |
| 1558 | STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| 1559 | __ Add(x10, x10, x10); |
| 1560 | __ Cmp(x10, Isolate::kJSRegexpStaticOffsetsVectorSize - 2); |
| 1561 | __ B(hi, &runtime); |
| 1562 | |
| 1563 | // Initialize offset for possibly sliced string. |
| 1564 | __ Mov(sliced_string_offset, 0); |
| 1565 | |
| 1566 | DCHECK(jssp.Is(__ StackPointer())); |
| 1567 | __ Peek(subject, kSubjectOffset); |
| 1568 | __ JumpIfSmi(subject, &runtime); |
| 1569 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1570 | __ Ldr(jsstring_length, FieldMemOperand(subject, String::kLengthOffset)); |
| 1571 | |
| 1572 | // Handle subject string according to its encoding and representation: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1573 | // (1) Sequential string? If yes, go to (4). |
| 1574 | // (2) Sequential or cons? If not, go to (5). |
| 1575 | // (3) Cons string. If the string is flat, replace subject with first string |
| 1576 | // and go to (1). Otherwise bail out to runtime. |
| 1577 | // (4) Sequential string. Load regexp code according to encoding. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1578 | // (E) Carry on. |
| 1579 | /// [...] |
| 1580 | |
| 1581 | // Deferred code at the end of the stub: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1582 | // (5) Long external string? If not, go to (7). |
| 1583 | // (6) External string. Make it, offset-wise, look like a sequential string. |
| 1584 | // Go to (4). |
| 1585 | // (7) Short external string or not a string? If yes, bail out to runtime. |
| 1586 | // (8) Sliced string. Replace subject with parent. Go to (1). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1587 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1588 | Label check_underlying; // (1) |
| 1589 | Label seq_string; // (4) |
| 1590 | Label not_seq_nor_cons; // (5) |
| 1591 | Label external_string; // (6) |
| 1592 | Label not_long_external; // (7) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1593 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1594 | __ Bind(&check_underlying); |
| 1595 | __ Ldr(x10, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 1596 | __ Ldrb(string_type, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| 1597 | |
| 1598 | // (1) Sequential string? If yes, go to (4). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1599 | __ And(string_representation, |
| 1600 | string_type, |
| 1601 | kIsNotStringMask | |
| 1602 | kStringRepresentationMask | |
| 1603 | kShortExternalStringMask); |
| 1604 | // We depend on the fact that Strings of type |
| 1605 | // SeqString and not ShortExternalString are defined |
| 1606 | // by the following pattern: |
| 1607 | // string_type: 0XX0 XX00 |
| 1608 | // ^ ^ ^^ |
| 1609 | // | | || |
| 1610 | // | | is a SeqString |
| 1611 | // | is not a short external String |
| 1612 | // is a String |
| 1613 | STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
| 1614 | STATIC_ASSERT(kShortExternalStringTag != 0); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1615 | __ Cbz(string_representation, &seq_string); // Go to (4). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1616 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1617 | // (2) Sequential or cons? If not, go to (5). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1618 | STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| 1619 | STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
| 1620 | STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| 1621 | STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
| 1622 | __ Cmp(string_representation, kExternalStringTag); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1623 | __ B(ge, ¬_seq_nor_cons); // Go to (5). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1624 | |
| 1625 | // (3) Cons string. Check that it's flat. |
| 1626 | __ Ldr(x10, FieldMemOperand(subject, ConsString::kSecondOffset)); |
| 1627 | __ JumpIfNotRoot(x10, Heap::kempty_stringRootIndex, &runtime); |
| 1628 | // Replace subject with first string. |
| 1629 | __ Ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1630 | __ B(&check_underlying); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1631 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1632 | // (4) Sequential string. Load regexp code according to encoding. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1633 | __ Bind(&seq_string); |
| 1634 | |
| 1635 | // Check that the third argument is a positive smi less than the subject |
| 1636 | // string length. A negative value will be greater (unsigned comparison). |
| 1637 | DCHECK(jssp.Is(__ StackPointer())); |
| 1638 | __ Peek(x10, kPreviousIndexOffset); |
| 1639 | __ JumpIfNotSmi(x10, &runtime); |
| 1640 | __ Cmp(jsstring_length, x10); |
| 1641 | __ B(ls, &runtime); |
| 1642 | |
| 1643 | // Argument 2 (x1): We need to load argument 2 (the previous index) into x1 |
| 1644 | // before entering the exit frame. |
| 1645 | __ SmiUntag(x1, x10); |
| 1646 | |
| 1647 | // The third bit determines the string encoding in string_type. |
| 1648 | STATIC_ASSERT(kOneByteStringTag == 0x04); |
| 1649 | STATIC_ASSERT(kTwoByteStringTag == 0x00); |
| 1650 | STATIC_ASSERT(kStringEncodingMask == 0x04); |
| 1651 | |
| 1652 | // Find the code object based on the assumptions above. |
| 1653 | // kDataOneByteCodeOffset and kDataUC16CodeOffset are adjacent, adds an offset |
| 1654 | // of kPointerSize to reach the latter. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1655 | STATIC_ASSERT(JSRegExp::kDataOneByteCodeOffset + kPointerSize == |
| 1656 | JSRegExp::kDataUC16CodeOffset); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1657 | __ Mov(x10, kPointerSize); |
| 1658 | // We will need the encoding later: Latin1 = 0x04 |
| 1659 | // UC16 = 0x00 |
| 1660 | __ Ands(string_encoding, string_type, kStringEncodingMask); |
| 1661 | __ CzeroX(x10, ne); |
| 1662 | __ Add(x10, regexp_data, x10); |
| 1663 | __ Ldr(code_object, FieldMemOperand(x10, JSRegExp::kDataOneByteCodeOffset)); |
| 1664 | |
| 1665 | // (E) Carry on. String handling is done. |
| 1666 | |
| 1667 | // Check that the irregexp code has been generated for the actual string |
| 1668 | // encoding. If it has, the field contains a code object otherwise it contains |
| 1669 | // a smi (code flushing support). |
| 1670 | __ JumpIfSmi(code_object, &runtime); |
| 1671 | |
| 1672 | // All checks done. Now push arguments for native regexp code. |
| 1673 | __ IncrementCounter(isolate()->counters()->regexp_entry_native(), 1, |
| 1674 | x10, |
| 1675 | x11); |
| 1676 | |
| 1677 | // Isolates: note we add an additional parameter here (isolate pointer). |
| 1678 | __ EnterExitFrame(false, x10, 1); |
| 1679 | DCHECK(csp.Is(__ StackPointer())); |
| 1680 | |
| 1681 | // We have 9 arguments to pass to the regexp code, therefore we have to pass |
| 1682 | // one on the stack and the rest as registers. |
| 1683 | |
| 1684 | // Note that the placement of the argument on the stack isn't standard |
| 1685 | // AAPCS64: |
| 1686 | // csp[0]: Space for the return address placed by DirectCEntryStub. |
| 1687 | // csp[8]: Argument 9, the current isolate address. |
| 1688 | |
| 1689 | __ Mov(x10, ExternalReference::isolate_address(isolate())); |
| 1690 | __ Poke(x10, kPointerSize); |
| 1691 | |
| 1692 | Register length = w11; |
| 1693 | Register previous_index_in_bytes = w12; |
| 1694 | Register start = x13; |
| 1695 | |
| 1696 | // Load start of the subject string. |
| 1697 | __ Add(start, subject, SeqString::kHeaderSize - kHeapObjectTag); |
| 1698 | // Load the length from the original subject string from the previous stack |
| 1699 | // frame. Therefore we have to use fp, which points exactly to two pointer |
| 1700 | // sizes below the previous sp. (Because creating a new stack frame pushes |
| 1701 | // the previous fp onto the stack and decrements sp by 2 * kPointerSize.) |
| 1702 | __ Ldr(subject, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
| 1703 | __ Ldr(length, UntagSmiFieldMemOperand(subject, String::kLengthOffset)); |
| 1704 | |
| 1705 | // Handle UC16 encoding, two bytes make one character. |
| 1706 | // string_encoding: if Latin1: 0x04 |
| 1707 | // if UC16: 0x00 |
| 1708 | STATIC_ASSERT(kStringEncodingMask == 0x04); |
| 1709 | __ Ubfx(string_encoding, string_encoding, 2, 1); |
| 1710 | __ Eor(string_encoding, string_encoding, 1); |
| 1711 | // string_encoding: if Latin1: 0 |
| 1712 | // if UC16: 1 |
| 1713 | |
| 1714 | // Convert string positions from characters to bytes. |
| 1715 | // Previous index is in x1. |
| 1716 | __ Lsl(previous_index_in_bytes, w1, string_encoding); |
| 1717 | __ Lsl(length, length, string_encoding); |
| 1718 | __ Lsl(sliced_string_offset, sliced_string_offset, string_encoding); |
| 1719 | |
| 1720 | // Argument 1 (x0): Subject string. |
| 1721 | __ Mov(x0, subject); |
| 1722 | |
| 1723 | // Argument 2 (x1): Previous index, already there. |
| 1724 | |
| 1725 | // Argument 3 (x2): Get the start of input. |
| 1726 | // Start of input = start of string + previous index + substring offset |
| 1727 | // (0 if the string |
| 1728 | // is not sliced). |
| 1729 | __ Add(w10, previous_index_in_bytes, sliced_string_offset); |
| 1730 | __ Add(x2, start, Operand(w10, UXTW)); |
| 1731 | |
| 1732 | // Argument 4 (x3): |
| 1733 | // End of input = start of input + (length of input - previous index) |
| 1734 | __ Sub(w10, length, previous_index_in_bytes); |
| 1735 | __ Add(x3, x2, Operand(w10, UXTW)); |
| 1736 | |
| 1737 | // Argument 5 (x4): static offsets vector buffer. |
| 1738 | __ Mov(x4, ExternalReference::address_of_static_offsets_vector(isolate())); |
| 1739 | |
| 1740 | // Argument 6 (x5): Set the number of capture registers to zero to force |
| 1741 | // global regexps to behave as non-global. This stub is not used for global |
| 1742 | // regexps. |
| 1743 | __ Mov(x5, 0); |
| 1744 | |
| 1745 | // Argument 7 (x6): Start (high end) of backtracking stack memory area. |
| 1746 | __ Mov(x10, address_of_regexp_stack_memory_address); |
| 1747 | __ Ldr(x10, MemOperand(x10)); |
| 1748 | __ Mov(x11, address_of_regexp_stack_memory_size); |
| 1749 | __ Ldr(x11, MemOperand(x11)); |
| 1750 | __ Add(x6, x10, x11); |
| 1751 | |
| 1752 | // Argument 8 (x7): Indicate that this is a direct call from JavaScript. |
| 1753 | __ Mov(x7, 1); |
| 1754 | |
| 1755 | // Locate the code entry and call it. |
| 1756 | __ Add(code_object, code_object, Code::kHeaderSize - kHeapObjectTag); |
| 1757 | DirectCEntryStub stub(isolate()); |
| 1758 | stub.GenerateCall(masm, code_object); |
| 1759 | |
| 1760 | __ LeaveExitFrame(false, x10, true); |
| 1761 | |
| 1762 | // The generated regexp code returns an int32 in w0. |
| 1763 | Label failure, exception; |
| 1764 | __ CompareAndBranch(w0, NativeRegExpMacroAssembler::FAILURE, eq, &failure); |
| 1765 | __ CompareAndBranch(w0, |
| 1766 | NativeRegExpMacroAssembler::EXCEPTION, |
| 1767 | eq, |
| 1768 | &exception); |
| 1769 | __ CompareAndBranch(w0, NativeRegExpMacroAssembler::RETRY, eq, &runtime); |
| 1770 | |
| 1771 | // Success: process the result from the native regexp code. |
| 1772 | Register number_of_capture_registers = x12; |
| 1773 | |
| 1774 | // Calculate number of capture registers (number_of_captures + 1) * 2 |
| 1775 | // and store it in the last match info. |
| 1776 | __ Ldrsw(x10, |
| 1777 | UntagSmiFieldMemOperand(regexp_data, |
| 1778 | JSRegExp::kIrregexpCaptureCountOffset)); |
| 1779 | __ Add(x10, x10, x10); |
| 1780 | __ Add(number_of_capture_registers, x10, 2); |
| 1781 | |
| 1782 | // Check that the fourth object is a JSArray object. |
| 1783 | DCHECK(jssp.Is(__ StackPointer())); |
| 1784 | __ Peek(x10, kLastMatchInfoOffset); |
| 1785 | __ JumpIfSmi(x10, &runtime); |
| 1786 | __ JumpIfNotObjectType(x10, x11, x11, JS_ARRAY_TYPE, &runtime); |
| 1787 | |
| 1788 | // Check that the JSArray is the fast case. |
| 1789 | __ Ldr(last_match_info_elements, |
| 1790 | FieldMemOperand(x10, JSArray::kElementsOffset)); |
| 1791 | __ Ldr(x10, |
| 1792 | FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| 1793 | __ JumpIfNotRoot(x10, Heap::kFixedArrayMapRootIndex, &runtime); |
| 1794 | |
| 1795 | // Check that the last match info has space for the capture registers and the |
| 1796 | // additional information (overhead). |
| 1797 | // (number_of_captures + 1) * 2 + overhead <= last match info size |
| 1798 | // (number_of_captures * 2) + 2 + overhead <= last match info size |
| 1799 | // number_of_capture_registers + overhead <= last match info size |
| 1800 | __ Ldrsw(x10, |
| 1801 | UntagSmiFieldMemOperand(last_match_info_elements, |
| 1802 | FixedArray::kLengthOffset)); |
| 1803 | __ Add(x11, number_of_capture_registers, RegExpImpl::kLastMatchOverhead); |
| 1804 | __ Cmp(x11, x10); |
| 1805 | __ B(gt, &runtime); |
| 1806 | |
| 1807 | // Store the capture count. |
| 1808 | __ SmiTag(x10, number_of_capture_registers); |
| 1809 | __ Str(x10, |
| 1810 | FieldMemOperand(last_match_info_elements, |
| 1811 | RegExpImpl::kLastCaptureCountOffset)); |
| 1812 | // Store last subject and last input. |
| 1813 | __ Str(subject, |
| 1814 | FieldMemOperand(last_match_info_elements, |
| 1815 | RegExpImpl::kLastSubjectOffset)); |
| 1816 | // Use x10 as the subject string in order to only need |
| 1817 | // one RecordWriteStub. |
| 1818 | __ Mov(x10, subject); |
| 1819 | __ RecordWriteField(last_match_info_elements, |
| 1820 | RegExpImpl::kLastSubjectOffset, |
| 1821 | x10, |
| 1822 | x11, |
| 1823 | kLRHasNotBeenSaved, |
| 1824 | kDontSaveFPRegs); |
| 1825 | __ Str(subject, |
| 1826 | FieldMemOperand(last_match_info_elements, |
| 1827 | RegExpImpl::kLastInputOffset)); |
| 1828 | __ Mov(x10, subject); |
| 1829 | __ RecordWriteField(last_match_info_elements, |
| 1830 | RegExpImpl::kLastInputOffset, |
| 1831 | x10, |
| 1832 | x11, |
| 1833 | kLRHasNotBeenSaved, |
| 1834 | kDontSaveFPRegs); |
| 1835 | |
| 1836 | Register last_match_offsets = x13; |
| 1837 | Register offsets_vector_index = x14; |
| 1838 | Register current_offset = x15; |
| 1839 | |
| 1840 | // Get the static offsets vector filled by the native regexp code |
| 1841 | // and fill the last match info. |
| 1842 | ExternalReference address_of_static_offsets_vector = |
| 1843 | ExternalReference::address_of_static_offsets_vector(isolate()); |
| 1844 | __ Mov(offsets_vector_index, address_of_static_offsets_vector); |
| 1845 | |
| 1846 | Label next_capture, done; |
| 1847 | // Capture register counter starts from number of capture registers and |
| 1848 | // iterates down to zero (inclusive). |
| 1849 | __ Add(last_match_offsets, |
| 1850 | last_match_info_elements, |
| 1851 | RegExpImpl::kFirstCaptureOffset - kHeapObjectTag); |
| 1852 | __ Bind(&next_capture); |
| 1853 | __ Subs(number_of_capture_registers, number_of_capture_registers, 2); |
| 1854 | __ B(mi, &done); |
| 1855 | // Read two 32 bit values from the static offsets vector buffer into |
| 1856 | // an X register |
| 1857 | __ Ldr(current_offset, |
| 1858 | MemOperand(offsets_vector_index, kWRegSize * 2, PostIndex)); |
| 1859 | // Store the smi values in the last match info. |
| 1860 | __ SmiTag(x10, current_offset); |
| 1861 | // Clearing the 32 bottom bits gives us a Smi. |
| 1862 | STATIC_ASSERT(kSmiTag == 0); |
| 1863 | __ Bic(x11, current_offset, kSmiShiftMask); |
| 1864 | __ Stp(x10, |
| 1865 | x11, |
| 1866 | MemOperand(last_match_offsets, kXRegSize * 2, PostIndex)); |
| 1867 | __ B(&next_capture); |
| 1868 | __ Bind(&done); |
| 1869 | |
| 1870 | // Return last match info. |
| 1871 | __ Peek(x0, kLastMatchInfoOffset); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1872 | // Drop the 4 arguments of the stub from the stack. |
| 1873 | __ Drop(4); |
| 1874 | __ Ret(); |
| 1875 | |
| 1876 | __ Bind(&exception); |
| 1877 | Register exception_value = x0; |
| 1878 | // A stack overflow (on the backtrack stack) may have occured |
| 1879 | // in the RegExp code but no exception has been created yet. |
| 1880 | // If there is no pending exception, handle that in the runtime system. |
| 1881 | __ Mov(x10, Operand(isolate()->factory()->the_hole_value())); |
| 1882 | __ Mov(x11, |
| 1883 | Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1884 | isolate()))); |
| 1885 | __ Ldr(exception_value, MemOperand(x11)); |
| 1886 | __ Cmp(x10, exception_value); |
| 1887 | __ B(eq, &runtime); |
| 1888 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1889 | // For exception, throw the exception again. |
| 1890 | __ TailCallRuntime(Runtime::kRegExpExecReThrow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1891 | |
| 1892 | __ Bind(&failure); |
| 1893 | __ Mov(x0, Operand(isolate()->factory()->null_value())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1894 | // Drop the 4 arguments of the stub from the stack. |
| 1895 | __ Drop(4); |
| 1896 | __ Ret(); |
| 1897 | |
| 1898 | __ Bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1899 | __ TailCallRuntime(Runtime::kRegExpExec); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1900 | |
| 1901 | // Deferred code for string handling. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1902 | // (5) Long external string? If not, go to (7). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1903 | __ Bind(¬_seq_nor_cons); |
| 1904 | // Compare flags are still set. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1905 | __ B(ne, ¬_long_external); // Go to (7). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1906 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1907 | // (6) External string. Make it, offset-wise, look like a sequential string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1908 | __ Bind(&external_string); |
| 1909 | if (masm->emit_debug_code()) { |
| 1910 | // Assert that we do not have a cons or slice (indirect strings) here. |
| 1911 | // Sequential strings have already been ruled out. |
| 1912 | __ Ldr(x10, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 1913 | __ Ldrb(x10, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| 1914 | __ Tst(x10, kIsIndirectStringMask); |
| 1915 | __ Check(eq, kExternalStringExpectedButNotFound); |
| 1916 | __ And(x10, x10, kStringRepresentationMask); |
| 1917 | __ Cmp(x10, 0); |
| 1918 | __ Check(ne, kExternalStringExpectedButNotFound); |
| 1919 | } |
| 1920 | __ Ldr(subject, |
| 1921 | FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| 1922 | // Move the pointer so that offset-wise, it looks like a sequential string. |
| 1923 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| 1924 | __ Sub(subject, subject, SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1925 | __ B(&seq_string); // Go to (4). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1927 | // (7) If this is a short external string or not a string, bail out to |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1928 | // runtime. |
| 1929 | __ Bind(¬_long_external); |
| 1930 | STATIC_ASSERT(kShortExternalStringTag != 0); |
| 1931 | __ TestAndBranchIfAnySet(string_representation, |
| 1932 | kShortExternalStringMask | kIsNotStringMask, |
| 1933 | &runtime); |
| 1934 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1935 | // (8) Sliced string. Replace subject with parent. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1936 | __ Ldr(sliced_string_offset, |
| 1937 | UntagSmiFieldMemOperand(subject, SlicedString::kOffsetOffset)); |
| 1938 | __ Ldr(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1939 | __ B(&check_underlying); // Go to (1). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1940 | #endif |
| 1941 | } |
| 1942 | |
| 1943 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1944 | static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub, |
| 1945 | Register argc, Register function, |
| 1946 | Register feedback_vector, Register index, |
| 1947 | Register new_target) { |
| 1948 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1949 | |
| 1950 | // Number-of-arguments register must be smi-tagged to call out. |
| 1951 | __ SmiTag(argc); |
| 1952 | __ Push(argc, function, feedback_vector, index); |
| 1953 | |
| 1954 | DCHECK(feedback_vector.Is(x2) && index.Is(x3)); |
| 1955 | __ CallStub(stub); |
| 1956 | |
| 1957 | __ Pop(index, feedback_vector, function, argc); |
| 1958 | __ SmiUntag(argc); |
| 1959 | } |
| 1960 | |
| 1961 | |
| 1962 | static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1963 | Register function, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1964 | Register feedback_vector, Register index, |
| 1965 | Register new_target, Register scratch1, |
| 1966 | Register scratch2, Register scratch3) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1967 | ASM_LOCATION("GenerateRecordCallTarget"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1968 | DCHECK(!AreAliased(scratch1, scratch2, scratch3, argc, function, |
| 1969 | feedback_vector, index, new_target)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1970 | // Cache the called function in a feedback vector slot. Cache states are |
| 1971 | // uninitialized, monomorphic (indicated by a JSFunction), and megamorphic. |
| 1972 | // argc : number of arguments to the construct function |
| 1973 | // function : the function to call |
| 1974 | // feedback_vector : the feedback vector |
| 1975 | // index : slot in feedback vector (smi) |
| 1976 | Label initialize, done, miss, megamorphic, not_array_function; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1977 | Label done_initialize_count, done_increment_count; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1978 | |
| 1979 | DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()), |
| 1980 | masm->isolate()->heap()->megamorphic_symbol()); |
| 1981 | DCHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(masm->isolate()), |
| 1982 | masm->isolate()->heap()->uninitialized_symbol()); |
| 1983 | |
| 1984 | // Load the cache state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1985 | Register feedback = scratch1; |
| 1986 | Register feedback_map = scratch2; |
| 1987 | Register feedback_value = scratch3; |
| 1988 | __ Add(feedback, feedback_vector, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1989 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1990 | __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1991 | |
| 1992 | // A monomorphic cache hit or an already megamorphic state: invoke the |
| 1993 | // function without changing the state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1994 | // We don't know if feedback value is a WeakCell or a Symbol, but it's |
| 1995 | // harmless to read at this position in a symbol (see static asserts in |
| 1996 | // type-feedback-vector.h). |
| 1997 | Label check_allocation_site; |
| 1998 | __ Ldr(feedback_value, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| 1999 | __ Cmp(function, feedback_value); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2000 | __ B(eq, &done_increment_count); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2001 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 2002 | __ B(eq, &done); |
| 2003 | __ Ldr(feedback_map, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 2004 | __ CompareRoot(feedback_map, Heap::kWeakCellMapRootIndex); |
| 2005 | __ B(ne, &check_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2006 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2007 | // If the weak cell is cleared, we have a new chance to become monomorphic. |
| 2008 | __ JumpIfSmi(feedback_value, &initialize); |
| 2009 | __ B(&megamorphic); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2010 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2011 | __ bind(&check_allocation_site); |
| 2012 | // If we came here, we need to see if we are the array function. |
| 2013 | // If we didn't have a matching function, and we didn't find the megamorph |
| 2014 | // sentinel, then we have in the slot either some other function or an |
| 2015 | // AllocationSite. |
| 2016 | __ JumpIfNotRoot(feedback_map, Heap::kAllocationSiteMapRootIndex, &miss); |
| 2017 | |
| 2018 | // Make sure the function is the Array() function |
| 2019 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1); |
| 2020 | __ Cmp(function, scratch1); |
| 2021 | __ B(ne, &megamorphic); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2022 | __ B(&done_increment_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2023 | |
| 2024 | __ Bind(&miss); |
| 2025 | |
| 2026 | // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| 2027 | // megamorphic. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2028 | __ JumpIfRoot(scratch1, Heap::kuninitialized_symbolRootIndex, &initialize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2029 | // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 2030 | // write-barrier is needed. |
| 2031 | __ Bind(&megamorphic); |
| 2032 | __ Add(scratch1, feedback_vector, |
| 2033 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2034 | __ LoadRoot(scratch2, Heap::kmegamorphic_symbolRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2035 | __ Str(scratch2, FieldMemOperand(scratch1, FixedArray::kHeaderSize)); |
| 2036 | __ B(&done); |
| 2037 | |
| 2038 | // An uninitialized cache is patched with the function or sentinel to |
| 2039 | // indicate the ElementsKind if function is the Array constructor. |
| 2040 | __ Bind(&initialize); |
| 2041 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2042 | // Make sure the function is the Array() function |
| 2043 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1); |
| 2044 | __ Cmp(function, scratch1); |
| 2045 | __ B(ne, ¬_array_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2046 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2047 | // The target function is the Array constructor, |
| 2048 | // Create an AllocationSite if we don't already have it, store it in the |
| 2049 | // slot. |
| 2050 | CreateAllocationSiteStub create_stub(masm->isolate()); |
| 2051 | CallStubInRecordCallTarget(masm, &create_stub, argc, function, |
| 2052 | feedback_vector, index, new_target); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2053 | __ B(&done_initialize_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2054 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2055 | __ Bind(¬_array_function); |
| 2056 | CreateWeakCellStub weak_cell_stub(masm->isolate()); |
| 2057 | CallStubInRecordCallTarget(masm, &weak_cell_stub, argc, function, |
| 2058 | feedback_vector, index, new_target); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2059 | |
| 2060 | __ bind(&done_initialize_count); |
| 2061 | // Initialize the call counter. |
| 2062 | __ Mov(scratch1, Operand(Smi::FromInt(1))); |
| 2063 | __ Adds(scratch2, feedback_vector, |
| 2064 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2065 | __ Str(scratch1, |
| 2066 | FieldMemOperand(scratch2, FixedArray::kHeaderSize + kPointerSize)); |
| 2067 | __ b(&done); |
| 2068 | |
| 2069 | __ bind(&done_increment_count); |
| 2070 | |
| 2071 | // Increment the call count for monomorphic function calls. |
| 2072 | __ Add(scratch1, feedback_vector, |
| 2073 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2074 | __ Add(scratch1, scratch1, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 2075 | __ Ldr(scratch2, FieldMemOperand(scratch1, 0)); |
| 2076 | __ Add(scratch2, scratch2, Operand(Smi::FromInt(1))); |
| 2077 | __ Str(scratch2, FieldMemOperand(scratch1, 0)); |
| 2078 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2079 | __ Bind(&done); |
| 2080 | } |
| 2081 | |
| 2082 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2083 | void CallConstructStub::Generate(MacroAssembler* masm) { |
| 2084 | ASM_LOCATION("CallConstructStub::Generate"); |
| 2085 | // x0 : number of arguments |
| 2086 | // x1 : the function to call |
| 2087 | // x2 : feedback vector |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2088 | // x3 : slot in feedback vector (Smi, for RecordCallTarget) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2089 | Register function = x1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2090 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2091 | Label non_function; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2092 | // Check that the function is not a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2093 | __ JumpIfSmi(function, &non_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2094 | // Check that the function is a JSFunction. |
| 2095 | Register object_type = x10; |
| 2096 | __ JumpIfNotObjectType(function, object_type, object_type, JS_FUNCTION_TYPE, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2097 | &non_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2098 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2099 | GenerateRecordCallTarget(masm, x0, function, x2, x3, x4, x5, x11, x12); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2100 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2101 | __ Add(x5, x2, Operand::UntagSmiAndScale(x3, kPointerSizeLog2)); |
| 2102 | Label feedback_register_initialized; |
| 2103 | // Put the AllocationSite from the feedback vector into x2, or undefined. |
| 2104 | __ Ldr(x2, FieldMemOperand(x5, FixedArray::kHeaderSize)); |
| 2105 | __ Ldr(x5, FieldMemOperand(x2, AllocationSite::kMapOffset)); |
| 2106 | __ JumpIfRoot(x5, Heap::kAllocationSiteMapRootIndex, |
| 2107 | &feedback_register_initialized); |
| 2108 | __ LoadRoot(x2, Heap::kUndefinedValueRootIndex); |
| 2109 | __ bind(&feedback_register_initialized); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2110 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2111 | __ AssertUndefinedOrAllocationSite(x2, x5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2112 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2113 | __ Mov(x3, function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2114 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2115 | // Tail call to the function-specific construct stub (still in the caller |
| 2116 | // context at this point). |
| 2117 | __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| 2118 | __ Ldr(x4, FieldMemOperand(x4, SharedFunctionInfo::kConstructStubOffset)); |
| 2119 | __ Add(x4, x4, Code::kHeaderSize - kHeapObjectTag); |
| 2120 | __ Br(x4); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2121 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2122 | __ Bind(&non_function); |
| 2123 | __ Mov(x3, function); |
| 2124 | __ Jump(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2125 | } |
| 2126 | |
| 2127 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2128 | void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2129 | // x1 - function |
| 2130 | // x3 - slot id |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2131 | // x2 - vector |
| 2132 | // x4 - allocation site (loaded from vector[slot]) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2133 | Register function = x1; |
| 2134 | Register feedback_vector = x2; |
| 2135 | Register index = x3; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2136 | Register allocation_site = x4; |
| 2137 | Register scratch = x5; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2138 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2139 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2140 | __ Cmp(function, scratch); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2141 | __ B(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2142 | |
| 2143 | __ Mov(x0, Operand(arg_count())); |
| 2144 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2145 | // Increment the call count for monomorphic function calls. |
| 2146 | __ Add(feedback_vector, feedback_vector, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2147 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2148 | __ Add(feedback_vector, feedback_vector, |
| 2149 | Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 2150 | __ Ldr(index, FieldMemOperand(feedback_vector, 0)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2151 | __ Add(index, index, Operand(Smi::FromInt(1))); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2152 | __ Str(index, FieldMemOperand(feedback_vector, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2153 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2154 | // Set up arguments for the array constructor stub. |
| 2155 | Register allocation_site_arg = feedback_vector; |
| 2156 | Register new_target_arg = index; |
| 2157 | __ Mov(allocation_site_arg, allocation_site); |
| 2158 | __ Mov(new_target_arg, function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2159 | ArrayConstructorStub stub(masm->isolate(), arg_count()); |
| 2160 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2161 | } |
| 2162 | |
| 2163 | |
| 2164 | void CallICStub::Generate(MacroAssembler* masm) { |
| 2165 | ASM_LOCATION("CallICStub"); |
| 2166 | |
| 2167 | // x1 - function |
| 2168 | // x3 - slot id (Smi) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2169 | // x2 - vector |
| 2170 | Label extra_checks_or_miss, call, call_function; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2171 | int argc = arg_count(); |
| 2172 | ParameterCount actual(argc); |
| 2173 | |
| 2174 | Register function = x1; |
| 2175 | Register feedback_vector = x2; |
| 2176 | Register index = x3; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2177 | |
| 2178 | // The checks. First, does x1 match the recorded monomorphic target? |
| 2179 | __ Add(x4, feedback_vector, |
| 2180 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2181 | __ Ldr(x4, FieldMemOperand(x4, FixedArray::kHeaderSize)); |
| 2182 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2183 | // We don't know that we have a weak cell. We might have a private symbol |
| 2184 | // or an AllocationSite, but the memory is safe to examine. |
| 2185 | // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to |
| 2186 | // FixedArray. |
| 2187 | // WeakCell::kValueOffset - contains a JSFunction or Smi(0) |
| 2188 | // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not |
| 2189 | // computed, meaning that it can't appear to be a pointer. If the low bit is |
| 2190 | // 0, then hash is computed, but the 0 bit prevents the field from appearing |
| 2191 | // to be a pointer. |
| 2192 | STATIC_ASSERT(WeakCell::kSize >= kPointerSize); |
| 2193 | STATIC_ASSERT(AllocationSite::kTransitionInfoOffset == |
| 2194 | WeakCell::kValueOffset && |
| 2195 | WeakCell::kValueOffset == Symbol::kHashFieldSlot); |
| 2196 | |
| 2197 | __ Ldr(x5, FieldMemOperand(x4, WeakCell::kValueOffset)); |
| 2198 | __ Cmp(x5, function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2199 | __ B(ne, &extra_checks_or_miss); |
| 2200 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2201 | // The compare above could have been a SMI/SMI comparison. Guard against this |
| 2202 | // convincing us that we have a monomorphic JSFunction. |
| 2203 | __ JumpIfSmi(function, &extra_checks_or_miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2204 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2205 | // Increment the call count for monomorphic function calls. |
| 2206 | __ Add(feedback_vector, feedback_vector, |
| 2207 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2208 | __ Add(feedback_vector, feedback_vector, |
| 2209 | Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 2210 | __ Ldr(index, FieldMemOperand(feedback_vector, 0)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2211 | __ Add(index, index, Operand(Smi::FromInt(1))); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2212 | __ Str(index, FieldMemOperand(feedback_vector, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2213 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2214 | __ Bind(&call_function); |
| 2215 | __ Mov(x0, argc); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2216 | __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(), |
| 2217 | tail_call_mode()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2218 | RelocInfo::CODE_TARGET); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2219 | |
| 2220 | __ bind(&extra_checks_or_miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2221 | Label uninitialized, miss, not_allocation_site; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2222 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2223 | __ JumpIfRoot(x4, Heap::kmegamorphic_symbolRootIndex, &call); |
| 2224 | |
| 2225 | __ Ldr(x5, FieldMemOperand(x4, HeapObject::kMapOffset)); |
| 2226 | __ JumpIfNotRoot(x5, Heap::kAllocationSiteMapRootIndex, ¬_allocation_site); |
| 2227 | |
| 2228 | HandleArrayCase(masm, &miss); |
| 2229 | |
| 2230 | __ bind(¬_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2231 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2232 | // The following cases attempt to handle MISS cases without going to the |
| 2233 | // runtime. |
| 2234 | if (FLAG_trace_ic) { |
| 2235 | __ jmp(&miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2236 | } |
| 2237 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2238 | __ JumpIfRoot(x4, Heap::kuninitialized_symbolRootIndex, &miss); |
| 2239 | |
| 2240 | // We are going megamorphic. If the feedback is a JSFunction, it is fine |
| 2241 | // to handle it here. More complex cases are dealt with in the runtime. |
| 2242 | __ AssertNotSmi(x4); |
| 2243 | __ JumpIfNotObjectType(x4, x5, x5, JS_FUNCTION_TYPE, &miss); |
| 2244 | __ Add(x4, feedback_vector, |
| 2245 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2246 | __ LoadRoot(x5, Heap::kmegamorphic_symbolRootIndex); |
| 2247 | __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2248 | |
| 2249 | __ Bind(&call); |
| 2250 | __ Mov(x0, argc); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2251 | __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2252 | RelocInfo::CODE_TARGET); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2253 | |
| 2254 | __ bind(&uninitialized); |
| 2255 | |
| 2256 | // We are going monomorphic, provided we actually have a JSFunction. |
| 2257 | __ JumpIfSmi(function, &miss); |
| 2258 | |
| 2259 | // Goto miss case if we do not have a function. |
| 2260 | __ JumpIfNotObjectType(function, x5, x5, JS_FUNCTION_TYPE, &miss); |
| 2261 | |
| 2262 | // Make sure the function is not the Array() function, which requires special |
| 2263 | // behavior on MISS. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2264 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, x5); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2265 | __ Cmp(function, x5); |
| 2266 | __ B(eq, &miss); |
| 2267 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2268 | // Make sure the function belongs to the same native context. |
| 2269 | __ Ldr(x4, FieldMemOperand(function, JSFunction::kContextOffset)); |
| 2270 | __ Ldr(x4, ContextMemOperand(x4, Context::NATIVE_CONTEXT_INDEX)); |
| 2271 | __ Ldr(x5, NativeContextMemOperand()); |
| 2272 | __ Cmp(x4, x5); |
| 2273 | __ B(ne, &miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2274 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2275 | // Initialize the call counter. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2276 | __ Mov(x5, Smi::FromInt(1)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2277 | __ Adds(x4, feedback_vector, |
| 2278 | Operand::UntagSmiAndScale(index, kPointerSizeLog2)); |
| 2279 | __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize + kPointerSize)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2280 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2281 | // Store the function. Use a stub since we need a frame for allocation. |
| 2282 | // x2 - vector |
| 2283 | // x3 - slot |
| 2284 | // x1 - function |
| 2285 | { |
| 2286 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2287 | CreateWeakCellStub create_stub(masm->isolate()); |
| 2288 | __ Push(function); |
| 2289 | __ CallStub(&create_stub); |
| 2290 | __ Pop(function); |
| 2291 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2292 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2293 | __ B(&call_function); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2294 | |
| 2295 | // We are here because tracing is on or we encountered a MISS case we can't |
| 2296 | // handle here. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2297 | __ bind(&miss); |
| 2298 | GenerateMiss(masm); |
| 2299 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2300 | __ B(&call); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2301 | } |
| 2302 | |
| 2303 | |
| 2304 | void CallICStub::GenerateMiss(MacroAssembler* masm) { |
| 2305 | ASM_LOCATION("CallICStub[Miss]"); |
| 2306 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2307 | FrameScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2308 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2309 | // Push the receiver and the function and feedback info. |
| 2310 | __ Push(x1, x2, x3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2311 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2312 | // Call the entry. |
| 2313 | __ CallRuntime(Runtime::kCallIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2315 | // Move result to edi and exit the internal frame. |
| 2316 | __ Mov(x1, x0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | |
| 2320 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
| 2321 | // If the receiver is a smi trigger the non-string case. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2322 | if (check_mode_ == RECEIVER_IS_UNKNOWN) { |
| 2323 | __ JumpIfSmi(object_, receiver_not_string_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2324 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2325 | // Fetch the instance type of the receiver into result register. |
| 2326 | __ Ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2327 | __ Ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2328 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2329 | // If the receiver is not a string trigger the non-string case. |
| 2330 | __ TestAndBranchIfAnySet(result_, kIsNotStringMask, receiver_not_string_); |
| 2331 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2332 | |
| 2333 | // If the index is non-smi trigger the non-smi case. |
| 2334 | __ JumpIfNotSmi(index_, &index_not_smi_); |
| 2335 | |
| 2336 | __ Bind(&got_smi_index_); |
| 2337 | // Check for index out of range. |
| 2338 | __ Ldrsw(result_, UntagSmiFieldMemOperand(object_, String::kLengthOffset)); |
| 2339 | __ Cmp(result_, Operand::UntagSmi(index_)); |
| 2340 | __ B(ls, index_out_of_range_); |
| 2341 | |
| 2342 | __ SmiUntag(index_); |
| 2343 | |
| 2344 | StringCharLoadGenerator::Generate(masm, |
| 2345 | object_, |
| 2346 | index_.W(), |
| 2347 | result_, |
| 2348 | &call_runtime_); |
| 2349 | __ SmiTag(result_); |
| 2350 | __ Bind(&exit_); |
| 2351 | } |
| 2352 | |
| 2353 | |
| 2354 | void StringCharCodeAtGenerator::GenerateSlow( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2355 | MacroAssembler* masm, EmbedMode embed_mode, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2356 | const RuntimeCallHelper& call_helper) { |
| 2357 | __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
| 2358 | |
| 2359 | __ Bind(&index_not_smi_); |
| 2360 | // If index is a heap number, try converting it to an integer. |
| 2361 | __ JumpIfNotHeapNumber(index_, index_not_number_); |
| 2362 | call_helper.BeforeCall(masm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2363 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2364 | __ Push(LoadWithVectorDescriptor::VectorRegister(), |
| 2365 | LoadWithVectorDescriptor::SlotRegister(), object_, index_); |
| 2366 | } else { |
| 2367 | // Save object_ on the stack and pass index_ as argument for runtime call. |
| 2368 | __ Push(object_, index_); |
| 2369 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2370 | __ CallRuntime(Runtime::kNumberToSmi); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2371 | // Save the conversion result before the pop instructions below |
| 2372 | // have a chance to overwrite it. |
| 2373 | __ Mov(index_, x0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2374 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2375 | __ Pop(object_, LoadWithVectorDescriptor::SlotRegister(), |
| 2376 | LoadWithVectorDescriptor::VectorRegister()); |
| 2377 | } else { |
| 2378 | __ Pop(object_); |
| 2379 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2380 | // Reload the instance type. |
| 2381 | __ Ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2382 | __ Ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 2383 | call_helper.AfterCall(masm); |
| 2384 | |
| 2385 | // If index is still not a smi, it must be out of range. |
| 2386 | __ JumpIfNotSmi(index_, index_out_of_range_); |
| 2387 | // Otherwise, return to the fast path. |
| 2388 | __ B(&got_smi_index_); |
| 2389 | |
| 2390 | // Call runtime. We get here when the receiver is a string and the |
| 2391 | // index is a number, but the code of getting the actual character |
| 2392 | // is too complex (e.g., when the string needs to be flattened). |
| 2393 | __ Bind(&call_runtime_); |
| 2394 | call_helper.BeforeCall(masm); |
| 2395 | __ SmiTag(index_); |
| 2396 | __ Push(object_, index_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2397 | __ CallRuntime(Runtime::kStringCharCodeAtRT); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2398 | __ Mov(result_, x0); |
| 2399 | call_helper.AfterCall(masm); |
| 2400 | __ B(&exit_); |
| 2401 | |
| 2402 | __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
| 2403 | } |
| 2404 | |
| 2405 | |
| 2406 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 2407 | __ JumpIfNotSmi(code_, &slow_case_); |
| 2408 | __ Cmp(code_, Smi::FromInt(String::kMaxOneByteCharCode)); |
| 2409 | __ B(hi, &slow_case_); |
| 2410 | |
| 2411 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
| 2412 | // At this point code register contains smi tagged one-byte char code. |
| 2413 | __ Add(result_, result_, Operand::UntagSmiAndScale(code_, kPointerSizeLog2)); |
| 2414 | __ Ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
| 2415 | __ JumpIfRoot(result_, Heap::kUndefinedValueRootIndex, &slow_case_); |
| 2416 | __ Bind(&exit_); |
| 2417 | } |
| 2418 | |
| 2419 | |
| 2420 | void StringCharFromCodeGenerator::GenerateSlow( |
| 2421 | MacroAssembler* masm, |
| 2422 | const RuntimeCallHelper& call_helper) { |
| 2423 | __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
| 2424 | |
| 2425 | __ Bind(&slow_case_); |
| 2426 | call_helper.BeforeCall(masm); |
| 2427 | __ Push(code_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2428 | __ CallRuntime(Runtime::kStringCharFromCode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2429 | __ Mov(result_, x0); |
| 2430 | call_helper.AfterCall(masm); |
| 2431 | __ B(&exit_); |
| 2432 | |
| 2433 | __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
| 2434 | } |
| 2435 | |
| 2436 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2437 | void CompareICStub::GenerateBooleans(MacroAssembler* masm) { |
| 2438 | // Inputs are in x0 (lhs) and x1 (rhs). |
| 2439 | DCHECK_EQ(CompareICState::BOOLEAN, state()); |
| 2440 | ASM_LOCATION("CompareICStub[Booleans]"); |
| 2441 | Label miss; |
| 2442 | |
| 2443 | __ CheckMap(x1, x2, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| 2444 | __ CheckMap(x0, x3, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2445 | if (!Token::IsEqualityOp(op())) { |
| 2446 | __ Ldr(x1, FieldMemOperand(x1, Oddball::kToNumberOffset)); |
| 2447 | __ AssertSmi(x1); |
| 2448 | __ Ldr(x0, FieldMemOperand(x0, Oddball::kToNumberOffset)); |
| 2449 | __ AssertSmi(x0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2450 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2451 | __ Sub(x0, x1, x0); |
| 2452 | __ Ret(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2453 | |
| 2454 | __ Bind(&miss); |
| 2455 | GenerateMiss(masm); |
| 2456 | } |
| 2457 | |
| 2458 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2459 | void CompareICStub::GenerateSmis(MacroAssembler* masm) { |
| 2460 | // Inputs are in x0 (lhs) and x1 (rhs). |
| 2461 | DCHECK(state() == CompareICState::SMI); |
| 2462 | ASM_LOCATION("CompareICStub[Smis]"); |
| 2463 | Label miss; |
| 2464 | // Bail out (to 'miss') unless both x0 and x1 are smis. |
| 2465 | __ JumpIfEitherNotSmi(x0, x1, &miss); |
| 2466 | |
| 2467 | if (GetCondition() == eq) { |
| 2468 | // For equality we do not care about the sign of the result. |
| 2469 | __ Sub(x0, x0, x1); |
| 2470 | } else { |
| 2471 | // Untag before subtracting to avoid handling overflow. |
| 2472 | __ SmiUntag(x1); |
| 2473 | __ Sub(x0, x1, Operand::UntagSmi(x0)); |
| 2474 | } |
| 2475 | __ Ret(); |
| 2476 | |
| 2477 | __ Bind(&miss); |
| 2478 | GenerateMiss(masm); |
| 2479 | } |
| 2480 | |
| 2481 | |
| 2482 | void CompareICStub::GenerateNumbers(MacroAssembler* masm) { |
| 2483 | DCHECK(state() == CompareICState::NUMBER); |
| 2484 | ASM_LOCATION("CompareICStub[HeapNumbers]"); |
| 2485 | |
| 2486 | Label unordered, maybe_undefined1, maybe_undefined2; |
| 2487 | Label miss, handle_lhs, values_in_d_regs; |
| 2488 | Label untag_rhs, untag_lhs; |
| 2489 | |
| 2490 | Register result = x0; |
| 2491 | Register rhs = x0; |
| 2492 | Register lhs = x1; |
| 2493 | FPRegister rhs_d = d0; |
| 2494 | FPRegister lhs_d = d1; |
| 2495 | |
| 2496 | if (left() == CompareICState::SMI) { |
| 2497 | __ JumpIfNotSmi(lhs, &miss); |
| 2498 | } |
| 2499 | if (right() == CompareICState::SMI) { |
| 2500 | __ JumpIfNotSmi(rhs, &miss); |
| 2501 | } |
| 2502 | |
| 2503 | __ SmiUntagToDouble(rhs_d, rhs, kSpeculativeUntag); |
| 2504 | __ SmiUntagToDouble(lhs_d, lhs, kSpeculativeUntag); |
| 2505 | |
| 2506 | // Load rhs if it's a heap number. |
| 2507 | __ JumpIfSmi(rhs, &handle_lhs); |
| 2508 | __ JumpIfNotHeapNumber(rhs, &maybe_undefined1); |
| 2509 | __ Ldr(rhs_d, FieldMemOperand(rhs, HeapNumber::kValueOffset)); |
| 2510 | |
| 2511 | // Load lhs if it's a heap number. |
| 2512 | __ Bind(&handle_lhs); |
| 2513 | __ JumpIfSmi(lhs, &values_in_d_regs); |
| 2514 | __ JumpIfNotHeapNumber(lhs, &maybe_undefined2); |
| 2515 | __ Ldr(lhs_d, FieldMemOperand(lhs, HeapNumber::kValueOffset)); |
| 2516 | |
| 2517 | __ Bind(&values_in_d_regs); |
| 2518 | __ Fcmp(lhs_d, rhs_d); |
| 2519 | __ B(vs, &unordered); // Overflow flag set if either is NaN. |
| 2520 | STATIC_ASSERT((LESS == -1) && (EQUAL == 0) && (GREATER == 1)); |
| 2521 | __ Cset(result, gt); // gt => 1, otherwise (lt, eq) => 0 (EQUAL). |
| 2522 | __ Csinv(result, result, xzr, ge); // lt => -1, gt => 1, eq => 0. |
| 2523 | __ Ret(); |
| 2524 | |
| 2525 | __ Bind(&unordered); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2526 | CompareICStub stub(isolate(), op(), CompareICState::GENERIC, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2527 | CompareICState::GENERIC, CompareICState::GENERIC); |
| 2528 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2529 | |
| 2530 | __ Bind(&maybe_undefined1); |
| 2531 | if (Token::IsOrderedRelationalCompareOp(op())) { |
| 2532 | __ JumpIfNotRoot(rhs, Heap::kUndefinedValueRootIndex, &miss); |
| 2533 | __ JumpIfSmi(lhs, &unordered); |
| 2534 | __ JumpIfNotHeapNumber(lhs, &maybe_undefined2); |
| 2535 | __ B(&unordered); |
| 2536 | } |
| 2537 | |
| 2538 | __ Bind(&maybe_undefined2); |
| 2539 | if (Token::IsOrderedRelationalCompareOp(op())) { |
| 2540 | __ JumpIfRoot(lhs, Heap::kUndefinedValueRootIndex, &unordered); |
| 2541 | } |
| 2542 | |
| 2543 | __ Bind(&miss); |
| 2544 | GenerateMiss(masm); |
| 2545 | } |
| 2546 | |
| 2547 | |
| 2548 | void CompareICStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| 2549 | DCHECK(state() == CompareICState::INTERNALIZED_STRING); |
| 2550 | ASM_LOCATION("CompareICStub[InternalizedStrings]"); |
| 2551 | Label miss; |
| 2552 | |
| 2553 | Register result = x0; |
| 2554 | Register rhs = x0; |
| 2555 | Register lhs = x1; |
| 2556 | |
| 2557 | // Check that both operands are heap objects. |
| 2558 | __ JumpIfEitherSmi(lhs, rhs, &miss); |
| 2559 | |
| 2560 | // Check that both operands are internalized strings. |
| 2561 | Register rhs_map = x10; |
| 2562 | Register lhs_map = x11; |
| 2563 | Register rhs_type = x10; |
| 2564 | Register lhs_type = x11; |
| 2565 | __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 2566 | __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 2567 | __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| 2568 | __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| 2569 | |
| 2570 | STATIC_ASSERT((kInternalizedTag == 0) && (kStringTag == 0)); |
| 2571 | __ Orr(x12, lhs_type, rhs_type); |
| 2572 | __ TestAndBranchIfAnySet( |
| 2573 | x12, kIsNotStringMask | kIsNotInternalizedMask, &miss); |
| 2574 | |
| 2575 | // Internalized strings are compared by identity. |
| 2576 | STATIC_ASSERT(EQUAL == 0); |
| 2577 | __ Cmp(lhs, rhs); |
| 2578 | __ Cset(result, ne); |
| 2579 | __ Ret(); |
| 2580 | |
| 2581 | __ Bind(&miss); |
| 2582 | GenerateMiss(masm); |
| 2583 | } |
| 2584 | |
| 2585 | |
| 2586 | void CompareICStub::GenerateUniqueNames(MacroAssembler* masm) { |
| 2587 | DCHECK(state() == CompareICState::UNIQUE_NAME); |
| 2588 | ASM_LOCATION("CompareICStub[UniqueNames]"); |
| 2589 | DCHECK(GetCondition() == eq); |
| 2590 | Label miss; |
| 2591 | |
| 2592 | Register result = x0; |
| 2593 | Register rhs = x0; |
| 2594 | Register lhs = x1; |
| 2595 | |
| 2596 | Register lhs_instance_type = w2; |
| 2597 | Register rhs_instance_type = w3; |
| 2598 | |
| 2599 | // Check that both operands are heap objects. |
| 2600 | __ JumpIfEitherSmi(lhs, rhs, &miss); |
| 2601 | |
| 2602 | // Check that both operands are unique names. This leaves the instance |
| 2603 | // types loaded in tmp1 and tmp2. |
| 2604 | __ Ldr(x10, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 2605 | __ Ldr(x11, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 2606 | __ Ldrb(lhs_instance_type, FieldMemOperand(x10, Map::kInstanceTypeOffset)); |
| 2607 | __ Ldrb(rhs_instance_type, FieldMemOperand(x11, Map::kInstanceTypeOffset)); |
| 2608 | |
| 2609 | // To avoid a miss, each instance type should be either SYMBOL_TYPE or it |
| 2610 | // should have kInternalizedTag set. |
| 2611 | __ JumpIfNotUniqueNameInstanceType(lhs_instance_type, &miss); |
| 2612 | __ JumpIfNotUniqueNameInstanceType(rhs_instance_type, &miss); |
| 2613 | |
| 2614 | // Unique names are compared by identity. |
| 2615 | STATIC_ASSERT(EQUAL == 0); |
| 2616 | __ Cmp(lhs, rhs); |
| 2617 | __ Cset(result, ne); |
| 2618 | __ Ret(); |
| 2619 | |
| 2620 | __ Bind(&miss); |
| 2621 | GenerateMiss(masm); |
| 2622 | } |
| 2623 | |
| 2624 | |
| 2625 | void CompareICStub::GenerateStrings(MacroAssembler* masm) { |
| 2626 | DCHECK(state() == CompareICState::STRING); |
| 2627 | ASM_LOCATION("CompareICStub[Strings]"); |
| 2628 | |
| 2629 | Label miss; |
| 2630 | |
| 2631 | bool equality = Token::IsEqualityOp(op()); |
| 2632 | |
| 2633 | Register result = x0; |
| 2634 | Register rhs = x0; |
| 2635 | Register lhs = x1; |
| 2636 | |
| 2637 | // Check that both operands are heap objects. |
| 2638 | __ JumpIfEitherSmi(rhs, lhs, &miss); |
| 2639 | |
| 2640 | // Check that both operands are strings. |
| 2641 | Register rhs_map = x10; |
| 2642 | Register lhs_map = x11; |
| 2643 | Register rhs_type = x10; |
| 2644 | Register lhs_type = x11; |
| 2645 | __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 2646 | __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 2647 | __ Ldrb(lhs_type, FieldMemOperand(lhs_map, Map::kInstanceTypeOffset)); |
| 2648 | __ Ldrb(rhs_type, FieldMemOperand(rhs_map, Map::kInstanceTypeOffset)); |
| 2649 | STATIC_ASSERT(kNotStringTag != 0); |
| 2650 | __ Orr(x12, lhs_type, rhs_type); |
| 2651 | __ Tbnz(x12, MaskToBit(kIsNotStringMask), &miss); |
| 2652 | |
| 2653 | // Fast check for identical strings. |
| 2654 | Label not_equal; |
| 2655 | __ Cmp(lhs, rhs); |
| 2656 | __ B(ne, ¬_equal); |
| 2657 | __ Mov(result, EQUAL); |
| 2658 | __ Ret(); |
| 2659 | |
| 2660 | __ Bind(¬_equal); |
| 2661 | // Handle not identical strings |
| 2662 | |
| 2663 | // Check that both strings are internalized strings. If they are, we're done |
| 2664 | // because we already know they are not identical. We know they are both |
| 2665 | // strings. |
| 2666 | if (equality) { |
| 2667 | DCHECK(GetCondition() == eq); |
| 2668 | STATIC_ASSERT(kInternalizedTag == 0); |
| 2669 | Label not_internalized_strings; |
| 2670 | __ Orr(x12, lhs_type, rhs_type); |
| 2671 | __ TestAndBranchIfAnySet( |
| 2672 | x12, kIsNotInternalizedMask, ¬_internalized_strings); |
| 2673 | // Result is in rhs (x0), and not EQUAL, as rhs is not a smi. |
| 2674 | __ Ret(); |
| 2675 | __ Bind(¬_internalized_strings); |
| 2676 | } |
| 2677 | |
| 2678 | // Check that both strings are sequential one-byte. |
| 2679 | Label runtime; |
| 2680 | __ JumpIfBothInstanceTypesAreNotSequentialOneByte(lhs_type, rhs_type, x12, |
| 2681 | x13, &runtime); |
| 2682 | |
| 2683 | // Compare flat one-byte strings. Returns when done. |
| 2684 | if (equality) { |
| 2685 | StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, x10, x11, |
| 2686 | x12); |
| 2687 | } else { |
| 2688 | StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, x10, x11, |
| 2689 | x12, x13); |
| 2690 | } |
| 2691 | |
| 2692 | // Handle more complex cases in runtime. |
| 2693 | __ Bind(&runtime); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2694 | if (equality) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2695 | { |
| 2696 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2697 | __ Push(lhs, rhs); |
| 2698 | __ CallRuntime(Runtime::kStringEqual); |
| 2699 | } |
| 2700 | __ LoadRoot(x1, Heap::kTrueValueRootIndex); |
| 2701 | __ Sub(x0, x0, x1); |
| 2702 | __ Ret(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2703 | } else { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2704 | __ Push(lhs, rhs); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2705 | __ TailCallRuntime(Runtime::kStringCompare); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2706 | } |
| 2707 | |
| 2708 | __ Bind(&miss); |
| 2709 | GenerateMiss(masm); |
| 2710 | } |
| 2711 | |
| 2712 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2713 | void CompareICStub::GenerateReceivers(MacroAssembler* masm) { |
| 2714 | DCHECK_EQ(CompareICState::RECEIVER, state()); |
| 2715 | ASM_LOCATION("CompareICStub[Receivers]"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2716 | |
| 2717 | Label miss; |
| 2718 | |
| 2719 | Register result = x0; |
| 2720 | Register rhs = x0; |
| 2721 | Register lhs = x1; |
| 2722 | |
| 2723 | __ JumpIfEitherSmi(rhs, lhs, &miss); |
| 2724 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2725 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 2726 | __ JumpIfObjectType(rhs, x10, x10, FIRST_JS_RECEIVER_TYPE, &miss, lt); |
| 2727 | __ JumpIfObjectType(lhs, x10, x10, FIRST_JS_RECEIVER_TYPE, &miss, lt); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2728 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2729 | DCHECK_EQ(eq, GetCondition()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2730 | __ Sub(result, rhs, lhs); |
| 2731 | __ Ret(); |
| 2732 | |
| 2733 | __ Bind(&miss); |
| 2734 | GenerateMiss(masm); |
| 2735 | } |
| 2736 | |
| 2737 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2738 | void CompareICStub::GenerateKnownReceivers(MacroAssembler* masm) { |
| 2739 | ASM_LOCATION("CompareICStub[KnownReceivers]"); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2740 | |
| 2741 | Label miss; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2742 | Handle<WeakCell> cell = Map::WeakCellForMap(known_map_); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2743 | |
| 2744 | Register result = x0; |
| 2745 | Register rhs = x0; |
| 2746 | Register lhs = x1; |
| 2747 | |
| 2748 | __ JumpIfEitherSmi(rhs, lhs, &miss); |
| 2749 | |
| 2750 | Register rhs_map = x10; |
| 2751 | Register lhs_map = x11; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2752 | Register map = x12; |
| 2753 | __ GetWeakValue(map, cell); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2754 | __ Ldr(rhs_map, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 2755 | __ Ldr(lhs_map, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2756 | __ Cmp(rhs_map, map); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2757 | __ B(ne, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2758 | __ Cmp(lhs_map, map); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2759 | __ B(ne, &miss); |
| 2760 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2761 | if (Token::IsEqualityOp(op())) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2762 | __ Sub(result, rhs, lhs); |
| 2763 | __ Ret(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2764 | } else { |
| 2765 | Register ncr = x2; |
| 2766 | if (op() == Token::LT || op() == Token::LTE) { |
| 2767 | __ Mov(ncr, Smi::FromInt(GREATER)); |
| 2768 | } else { |
| 2769 | __ Mov(ncr, Smi::FromInt(LESS)); |
| 2770 | } |
| 2771 | __ Push(lhs, rhs, ncr); |
| 2772 | __ TailCallRuntime(Runtime::kCompare); |
| 2773 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2774 | |
| 2775 | __ Bind(&miss); |
| 2776 | GenerateMiss(masm); |
| 2777 | } |
| 2778 | |
| 2779 | |
| 2780 | // This method handles the case where a compare stub had the wrong |
| 2781 | // implementation. It calls a miss handler, which re-writes the stub. All other |
| 2782 | // CompareICStub::Generate* methods should fall back into this one if their |
| 2783 | // operands were not the expected types. |
| 2784 | void CompareICStub::GenerateMiss(MacroAssembler* masm) { |
| 2785 | ASM_LOCATION("CompareICStub[Miss]"); |
| 2786 | |
| 2787 | Register stub_entry = x11; |
| 2788 | { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2789 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2790 | Register op = x10; |
| 2791 | Register left = x1; |
| 2792 | Register right = x0; |
| 2793 | // Preserve some caller-saved registers. |
| 2794 | __ Push(x1, x0, lr); |
| 2795 | // Push the arguments. |
| 2796 | __ Mov(op, Smi::FromInt(this->op())); |
| 2797 | __ Push(left, right, op); |
| 2798 | |
| 2799 | // Call the miss handler. This also pops the arguments. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2800 | __ CallRuntime(Runtime::kCompareIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2801 | |
| 2802 | // Compute the entry point of the rewritten stub. |
| 2803 | __ Add(stub_entry, x0, Code::kHeaderSize - kHeapObjectTag); |
| 2804 | // Restore caller-saved registers. |
| 2805 | __ Pop(lr, x0, x1); |
| 2806 | } |
| 2807 | |
| 2808 | // Tail-call to the new stub. |
| 2809 | __ Jump(stub_entry); |
| 2810 | } |
| 2811 | |
| 2812 | |
| 2813 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 2814 | ASM_LOCATION("SubStringStub::Generate"); |
| 2815 | Label runtime; |
| 2816 | |
| 2817 | // Stack frame on entry. |
| 2818 | // lr: return address |
| 2819 | // jssp[0]: substring "to" offset |
| 2820 | // jssp[8]: substring "from" offset |
| 2821 | // jssp[16]: pointer to string object |
| 2822 | |
| 2823 | // This stub is called from the native-call %_SubString(...), so |
| 2824 | // nothing can be assumed about the arguments. It is tested that: |
| 2825 | // "string" is a sequential string, |
| 2826 | // both "from" and "to" are smis, and |
| 2827 | // 0 <= from <= to <= string.length (in debug mode.) |
| 2828 | // If any of these assumptions fail, we call the runtime system. |
| 2829 | |
| 2830 | static const int kToOffset = 0 * kPointerSize; |
| 2831 | static const int kFromOffset = 1 * kPointerSize; |
| 2832 | static const int kStringOffset = 2 * kPointerSize; |
| 2833 | |
| 2834 | Register to = x0; |
| 2835 | Register from = x15; |
| 2836 | Register input_string = x10; |
| 2837 | Register input_length = x11; |
| 2838 | Register input_type = x12; |
| 2839 | Register result_string = x0; |
| 2840 | Register result_length = x1; |
| 2841 | Register temp = x3; |
| 2842 | |
| 2843 | __ Peek(to, kToOffset); |
| 2844 | __ Peek(from, kFromOffset); |
| 2845 | |
| 2846 | // Check that both from and to are smis. If not, jump to runtime. |
| 2847 | __ JumpIfEitherNotSmi(from, to, &runtime); |
| 2848 | __ SmiUntag(from); |
| 2849 | __ SmiUntag(to); |
| 2850 | |
| 2851 | // Calculate difference between from and to. If to < from, branch to runtime. |
| 2852 | __ Subs(result_length, to, from); |
| 2853 | __ B(mi, &runtime); |
| 2854 | |
| 2855 | // Check from is positive. |
| 2856 | __ Tbnz(from, kWSignBit, &runtime); |
| 2857 | |
| 2858 | // Make sure first argument is a string. |
| 2859 | __ Peek(input_string, kStringOffset); |
| 2860 | __ JumpIfSmi(input_string, &runtime); |
| 2861 | __ IsObjectJSStringType(input_string, input_type, &runtime); |
| 2862 | |
| 2863 | Label single_char; |
| 2864 | __ Cmp(result_length, 1); |
| 2865 | __ B(eq, &single_char); |
| 2866 | |
| 2867 | // Short-cut for the case of trivial substring. |
| 2868 | Label return_x0; |
| 2869 | __ Ldrsw(input_length, |
| 2870 | UntagSmiFieldMemOperand(input_string, String::kLengthOffset)); |
| 2871 | |
| 2872 | __ Cmp(result_length, input_length); |
| 2873 | __ CmovX(x0, input_string, eq); |
| 2874 | // Return original string. |
| 2875 | __ B(eq, &return_x0); |
| 2876 | |
| 2877 | // Longer than original string's length or negative: unsafe arguments. |
| 2878 | __ B(hi, &runtime); |
| 2879 | |
| 2880 | // Shorter than original string's length: an actual substring. |
| 2881 | |
| 2882 | // x0 to substring end character offset |
| 2883 | // x1 result_length length of substring result |
| 2884 | // x10 input_string pointer to input string object |
| 2885 | // x10 unpacked_string pointer to unpacked string object |
| 2886 | // x11 input_length length of input string |
| 2887 | // x12 input_type instance type of input string |
| 2888 | // x15 from substring start character offset |
| 2889 | |
| 2890 | // Deal with different string types: update the index if necessary and put |
| 2891 | // the underlying string into register unpacked_string. |
| 2892 | Label underlying_unpacked, sliced_string, seq_or_external_string; |
| 2893 | Label update_instance_type; |
| 2894 | // If the string is not indirect, it can only be sequential or external. |
| 2895 | STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| 2896 | STATIC_ASSERT(kIsIndirectStringMask != 0); |
| 2897 | |
| 2898 | // Test for string types, and branch/fall through to appropriate unpacking |
| 2899 | // code. |
| 2900 | __ Tst(input_type, kIsIndirectStringMask); |
| 2901 | __ B(eq, &seq_or_external_string); |
| 2902 | __ Tst(input_type, kSlicedNotConsMask); |
| 2903 | __ B(ne, &sliced_string); |
| 2904 | |
| 2905 | Register unpacked_string = input_string; |
| 2906 | |
| 2907 | // Cons string. Check whether it is flat, then fetch first part. |
| 2908 | __ Ldr(temp, FieldMemOperand(input_string, ConsString::kSecondOffset)); |
| 2909 | __ JumpIfNotRoot(temp, Heap::kempty_stringRootIndex, &runtime); |
| 2910 | __ Ldr(unpacked_string, |
| 2911 | FieldMemOperand(input_string, ConsString::kFirstOffset)); |
| 2912 | __ B(&update_instance_type); |
| 2913 | |
| 2914 | __ Bind(&sliced_string); |
| 2915 | // Sliced string. Fetch parent and correct start index by offset. |
| 2916 | __ Ldrsw(temp, |
| 2917 | UntagSmiFieldMemOperand(input_string, SlicedString::kOffsetOffset)); |
| 2918 | __ Add(from, from, temp); |
| 2919 | __ Ldr(unpacked_string, |
| 2920 | FieldMemOperand(input_string, SlicedString::kParentOffset)); |
| 2921 | |
| 2922 | __ Bind(&update_instance_type); |
| 2923 | __ Ldr(temp, FieldMemOperand(unpacked_string, HeapObject::kMapOffset)); |
| 2924 | __ Ldrb(input_type, FieldMemOperand(temp, Map::kInstanceTypeOffset)); |
| 2925 | // Now control must go to &underlying_unpacked. Since the no code is generated |
| 2926 | // before then we fall through instead of generating a useless branch. |
| 2927 | |
| 2928 | __ Bind(&seq_or_external_string); |
| 2929 | // Sequential or external string. Registers unpacked_string and input_string |
| 2930 | // alias, so there's nothing to do here. |
| 2931 | // Note that if code is added here, the above code must be updated. |
| 2932 | |
| 2933 | // x0 result_string pointer to result string object (uninit) |
| 2934 | // x1 result_length length of substring result |
| 2935 | // x10 unpacked_string pointer to unpacked string object |
| 2936 | // x11 input_length length of input string |
| 2937 | // x12 input_type instance type of input string |
| 2938 | // x15 from substring start character offset |
| 2939 | __ Bind(&underlying_unpacked); |
| 2940 | |
| 2941 | if (FLAG_string_slices) { |
| 2942 | Label copy_routine; |
| 2943 | __ Cmp(result_length, SlicedString::kMinLength); |
| 2944 | // Short slice. Copy instead of slicing. |
| 2945 | __ B(lt, ©_routine); |
| 2946 | // Allocate new sliced string. At this point we do not reload the instance |
| 2947 | // type including the string encoding because we simply rely on the info |
| 2948 | // provided by the original string. It does not matter if the original |
| 2949 | // string's encoding is wrong because we always have to recheck encoding of |
| 2950 | // the newly created string's parent anyway due to externalized strings. |
| 2951 | Label two_byte_slice, set_slice_header; |
| 2952 | STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
| 2953 | STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| 2954 | __ Tbz(input_type, MaskToBit(kStringEncodingMask), &two_byte_slice); |
| 2955 | __ AllocateOneByteSlicedString(result_string, result_length, x3, x4, |
| 2956 | &runtime); |
| 2957 | __ B(&set_slice_header); |
| 2958 | |
| 2959 | __ Bind(&two_byte_slice); |
| 2960 | __ AllocateTwoByteSlicedString(result_string, result_length, x3, x4, |
| 2961 | &runtime); |
| 2962 | |
| 2963 | __ Bind(&set_slice_header); |
| 2964 | __ SmiTag(from); |
| 2965 | __ Str(from, FieldMemOperand(result_string, SlicedString::kOffsetOffset)); |
| 2966 | __ Str(unpacked_string, |
| 2967 | FieldMemOperand(result_string, SlicedString::kParentOffset)); |
| 2968 | __ B(&return_x0); |
| 2969 | |
| 2970 | __ Bind(©_routine); |
| 2971 | } |
| 2972 | |
| 2973 | // x0 result_string pointer to result string object (uninit) |
| 2974 | // x1 result_length length of substring result |
| 2975 | // x10 unpacked_string pointer to unpacked string object |
| 2976 | // x11 input_length length of input string |
| 2977 | // x12 input_type instance type of input string |
| 2978 | // x13 unpacked_char0 pointer to first char of unpacked string (uninit) |
| 2979 | // x13 substring_char0 pointer to first char of substring (uninit) |
| 2980 | // x14 result_char0 pointer to first char of result (uninit) |
| 2981 | // x15 from substring start character offset |
| 2982 | Register unpacked_char0 = x13; |
| 2983 | Register substring_char0 = x13; |
| 2984 | Register result_char0 = x14; |
| 2985 | Label two_byte_sequential, sequential_string, allocate_result; |
| 2986 | STATIC_ASSERT(kExternalStringTag != 0); |
| 2987 | STATIC_ASSERT(kSeqStringTag == 0); |
| 2988 | |
| 2989 | __ Tst(input_type, kExternalStringTag); |
| 2990 | __ B(eq, &sequential_string); |
| 2991 | |
| 2992 | __ Tst(input_type, kShortExternalStringTag); |
| 2993 | __ B(ne, &runtime); |
| 2994 | __ Ldr(unpacked_char0, |
| 2995 | FieldMemOperand(unpacked_string, ExternalString::kResourceDataOffset)); |
| 2996 | // unpacked_char0 points to the first character of the underlying string. |
| 2997 | __ B(&allocate_result); |
| 2998 | |
| 2999 | __ Bind(&sequential_string); |
| 3000 | // Locate first character of underlying subject string. |
| 3001 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| 3002 | __ Add(unpacked_char0, unpacked_string, |
| 3003 | SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| 3004 | |
| 3005 | __ Bind(&allocate_result); |
| 3006 | // Sequential one-byte string. Allocate the result. |
| 3007 | STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
| 3008 | __ Tbz(input_type, MaskToBit(kStringEncodingMask), &two_byte_sequential); |
| 3009 | |
| 3010 | // Allocate and copy the resulting one-byte string. |
| 3011 | __ AllocateOneByteString(result_string, result_length, x3, x4, x5, &runtime); |
| 3012 | |
| 3013 | // Locate first character of substring to copy. |
| 3014 | __ Add(substring_char0, unpacked_char0, from); |
| 3015 | |
| 3016 | // Locate first character of result. |
| 3017 | __ Add(result_char0, result_string, |
| 3018 | SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| 3019 | |
| 3020 | STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 3021 | __ CopyBytes(result_char0, substring_char0, result_length, x3, kCopyLong); |
| 3022 | __ B(&return_x0); |
| 3023 | |
| 3024 | // Allocate and copy the resulting two-byte string. |
| 3025 | __ Bind(&two_byte_sequential); |
| 3026 | __ AllocateTwoByteString(result_string, result_length, x3, x4, x5, &runtime); |
| 3027 | |
| 3028 | // Locate first character of substring to copy. |
| 3029 | __ Add(substring_char0, unpacked_char0, Operand(from, LSL, 1)); |
| 3030 | |
| 3031 | // Locate first character of result. |
| 3032 | __ Add(result_char0, result_string, |
| 3033 | SeqTwoByteString::kHeaderSize - kHeapObjectTag); |
| 3034 | |
| 3035 | STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 3036 | __ Add(result_length, result_length, result_length); |
| 3037 | __ CopyBytes(result_char0, substring_char0, result_length, x3, kCopyLong); |
| 3038 | |
| 3039 | __ Bind(&return_x0); |
| 3040 | Counters* counters = isolate()->counters(); |
| 3041 | __ IncrementCounter(counters->sub_string_native(), 1, x3, x4); |
| 3042 | __ Drop(3); |
| 3043 | __ Ret(); |
| 3044 | |
| 3045 | __ Bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3046 | __ TailCallRuntime(Runtime::kSubString); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3047 | |
| 3048 | __ bind(&single_char); |
| 3049 | // x1: result_length |
| 3050 | // x10: input_string |
| 3051 | // x12: input_type |
| 3052 | // x15: from (untagged) |
| 3053 | __ SmiTag(from); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3054 | StringCharAtGenerator generator(input_string, from, result_length, x0, |
| 3055 | &runtime, &runtime, &runtime, |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3056 | RECEIVER_IS_STRING); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3057 | generator.GenerateFast(masm); |
| 3058 | __ Drop(3); |
| 3059 | __ Ret(); |
| 3060 | generator.SkipSlow(masm, &runtime); |
| 3061 | } |
| 3062 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3063 | void ToStringStub::Generate(MacroAssembler* masm) { |
| 3064 | // The ToString stub takes one argument in x0. |
| 3065 | Label is_number; |
| 3066 | __ JumpIfSmi(x0, &is_number); |
| 3067 | |
| 3068 | Label not_string; |
| 3069 | __ JumpIfObjectType(x0, x1, x1, FIRST_NONSTRING_TYPE, ¬_string, hs); |
| 3070 | // x0: receiver |
| 3071 | // x1: receiver instance type |
| 3072 | __ Ret(); |
| 3073 | __ Bind(¬_string); |
| 3074 | |
| 3075 | Label not_heap_number; |
| 3076 | __ Cmp(x1, HEAP_NUMBER_TYPE); |
| 3077 | __ B(ne, ¬_heap_number); |
| 3078 | __ Bind(&is_number); |
| 3079 | NumberToStringStub stub(isolate()); |
| 3080 | __ TailCallStub(&stub); |
| 3081 | __ Bind(¬_heap_number); |
| 3082 | |
| 3083 | Label not_oddball; |
| 3084 | __ Cmp(x1, ODDBALL_TYPE); |
| 3085 | __ B(ne, ¬_oddball); |
| 3086 | __ Ldr(x0, FieldMemOperand(x0, Oddball::kToStringOffset)); |
| 3087 | __ Ret(); |
| 3088 | __ Bind(¬_oddball); |
| 3089 | |
| 3090 | __ Push(x0); // Push argument. |
| 3091 | __ TailCallRuntime(Runtime::kToString); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3092 | } |
| 3093 | |
| 3094 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3095 | void ToNameStub::Generate(MacroAssembler* masm) { |
| 3096 | // The ToName stub takes one argument in x0. |
| 3097 | Label is_number; |
| 3098 | __ JumpIfSmi(x0, &is_number); |
| 3099 | |
| 3100 | Label not_name; |
| 3101 | STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE); |
| 3102 | __ JumpIfObjectType(x0, x1, x1, LAST_NAME_TYPE, ¬_name, hi); |
| 3103 | // x0: receiver |
| 3104 | // x1: receiver instance type |
| 3105 | __ Ret(); |
| 3106 | __ Bind(¬_name); |
| 3107 | |
| 3108 | Label not_heap_number; |
| 3109 | __ Cmp(x1, HEAP_NUMBER_TYPE); |
| 3110 | __ B(ne, ¬_heap_number); |
| 3111 | __ Bind(&is_number); |
| 3112 | NumberToStringStub stub(isolate()); |
| 3113 | __ TailCallStub(&stub); |
| 3114 | __ Bind(¬_heap_number); |
| 3115 | |
| 3116 | Label not_oddball; |
| 3117 | __ Cmp(x1, ODDBALL_TYPE); |
| 3118 | __ B(ne, ¬_oddball); |
| 3119 | __ Ldr(x0, FieldMemOperand(x0, Oddball::kToStringOffset)); |
| 3120 | __ Ret(); |
| 3121 | __ Bind(¬_oddball); |
| 3122 | |
| 3123 | __ Push(x0); // Push argument. |
| 3124 | __ TailCallRuntime(Runtime::kToName); |
| 3125 | } |
| 3126 | |
| 3127 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3128 | void StringHelper::GenerateFlatOneByteStringEquals( |
| 3129 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 3130 | Register scratch2, Register scratch3) { |
| 3131 | DCHECK(!AreAliased(left, right, scratch1, scratch2, scratch3)); |
| 3132 | Register result = x0; |
| 3133 | Register left_length = scratch1; |
| 3134 | Register right_length = scratch2; |
| 3135 | |
| 3136 | // Compare lengths. If lengths differ, strings can't be equal. Lengths are |
| 3137 | // smis, and don't need to be untagged. |
| 3138 | Label strings_not_equal, check_zero_length; |
| 3139 | __ Ldr(left_length, FieldMemOperand(left, String::kLengthOffset)); |
| 3140 | __ Ldr(right_length, FieldMemOperand(right, String::kLengthOffset)); |
| 3141 | __ Cmp(left_length, right_length); |
| 3142 | __ B(eq, &check_zero_length); |
| 3143 | |
| 3144 | __ Bind(&strings_not_equal); |
| 3145 | __ Mov(result, Smi::FromInt(NOT_EQUAL)); |
| 3146 | __ Ret(); |
| 3147 | |
| 3148 | // Check if the length is zero. If so, the strings must be equal (and empty.) |
| 3149 | Label compare_chars; |
| 3150 | __ Bind(&check_zero_length); |
| 3151 | STATIC_ASSERT(kSmiTag == 0); |
| 3152 | __ Cbnz(left_length, &compare_chars); |
| 3153 | __ Mov(result, Smi::FromInt(EQUAL)); |
| 3154 | __ Ret(); |
| 3155 | |
| 3156 | // Compare characters. Falls through if all characters are equal. |
| 3157 | __ Bind(&compare_chars); |
| 3158 | GenerateOneByteCharsCompareLoop(masm, left, right, left_length, scratch2, |
| 3159 | scratch3, &strings_not_equal); |
| 3160 | |
| 3161 | // Characters in strings are equal. |
| 3162 | __ Mov(result, Smi::FromInt(EQUAL)); |
| 3163 | __ Ret(); |
| 3164 | } |
| 3165 | |
| 3166 | |
| 3167 | void StringHelper::GenerateCompareFlatOneByteStrings( |
| 3168 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 3169 | Register scratch2, Register scratch3, Register scratch4) { |
| 3170 | DCHECK(!AreAliased(left, right, scratch1, scratch2, scratch3, scratch4)); |
| 3171 | Label result_not_equal, compare_lengths; |
| 3172 | |
| 3173 | // Find minimum length and length difference. |
| 3174 | Register length_delta = scratch3; |
| 3175 | __ Ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 3176 | __ Ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 3177 | __ Subs(length_delta, scratch1, scratch2); |
| 3178 | |
| 3179 | Register min_length = scratch1; |
| 3180 | __ Csel(min_length, scratch2, scratch1, gt); |
| 3181 | __ Cbz(min_length, &compare_lengths); |
| 3182 | |
| 3183 | // Compare loop. |
| 3184 | GenerateOneByteCharsCompareLoop(masm, left, right, min_length, scratch2, |
| 3185 | scratch4, &result_not_equal); |
| 3186 | |
| 3187 | // Compare lengths - strings up to min-length are equal. |
| 3188 | __ Bind(&compare_lengths); |
| 3189 | |
| 3190 | DCHECK(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
| 3191 | |
| 3192 | // Use length_delta as result if it's zero. |
| 3193 | Register result = x0; |
| 3194 | __ Subs(result, length_delta, 0); |
| 3195 | |
| 3196 | __ Bind(&result_not_equal); |
| 3197 | Register greater = x10; |
| 3198 | Register less = x11; |
| 3199 | __ Mov(greater, Smi::FromInt(GREATER)); |
| 3200 | __ Mov(less, Smi::FromInt(LESS)); |
| 3201 | __ CmovX(result, greater, gt); |
| 3202 | __ CmovX(result, less, lt); |
| 3203 | __ Ret(); |
| 3204 | } |
| 3205 | |
| 3206 | |
| 3207 | void StringHelper::GenerateOneByteCharsCompareLoop( |
| 3208 | MacroAssembler* masm, Register left, Register right, Register length, |
| 3209 | Register scratch1, Register scratch2, Label* chars_not_equal) { |
| 3210 | DCHECK(!AreAliased(left, right, length, scratch1, scratch2)); |
| 3211 | |
| 3212 | // Change index to run from -length to -1 by adding length to string |
| 3213 | // start. This means that loop ends when index reaches zero, which |
| 3214 | // doesn't need an additional compare. |
| 3215 | __ SmiUntag(length); |
| 3216 | __ Add(scratch1, length, SeqOneByteString::kHeaderSize - kHeapObjectTag); |
| 3217 | __ Add(left, left, scratch1); |
| 3218 | __ Add(right, right, scratch1); |
| 3219 | |
| 3220 | Register index = length; |
| 3221 | __ Neg(index, length); // index = -length; |
| 3222 | |
| 3223 | // Compare loop |
| 3224 | Label loop; |
| 3225 | __ Bind(&loop); |
| 3226 | __ Ldrb(scratch1, MemOperand(left, index)); |
| 3227 | __ Ldrb(scratch2, MemOperand(right, index)); |
| 3228 | __ Cmp(scratch1, scratch2); |
| 3229 | __ B(ne, chars_not_equal); |
| 3230 | __ Add(index, index, 1); |
| 3231 | __ Cbnz(index, &loop); |
| 3232 | } |
| 3233 | |
| 3234 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3235 | void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
| 3236 | // ----------- S t a t e ------------- |
| 3237 | // -- x1 : left |
| 3238 | // -- x0 : right |
| 3239 | // -- lr : return address |
| 3240 | // ----------------------------------- |
| 3241 | |
| 3242 | // Load x2 with the allocation site. We stick an undefined dummy value here |
| 3243 | // and replace it with the real allocation site later when we instantiate this |
| 3244 | // stub in BinaryOpICWithAllocationSiteStub::GetCodeCopyFromTemplate(). |
| 3245 | __ LoadObject(x2, handle(isolate()->heap()->undefined_value())); |
| 3246 | |
| 3247 | // Make sure that we actually patched the allocation site. |
| 3248 | if (FLAG_debug_code) { |
| 3249 | __ AssertNotSmi(x2, kExpectedAllocationSite); |
| 3250 | __ Ldr(x10, FieldMemOperand(x2, HeapObject::kMapOffset)); |
| 3251 | __ AssertRegisterIsRoot(x10, Heap::kAllocationSiteMapRootIndex, |
| 3252 | kExpectedAllocationSite); |
| 3253 | } |
| 3254 | |
| 3255 | // Tail call into the stub that handles binary operations with allocation |
| 3256 | // sites. |
| 3257 | BinaryOpWithAllocationSiteStub stub(isolate(), state()); |
| 3258 | __ TailCallStub(&stub); |
| 3259 | } |
| 3260 | |
| 3261 | |
| 3262 | void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| 3263 | // We need some extra registers for this stub, they have been allocated |
| 3264 | // but we need to save them before using them. |
| 3265 | regs_.Save(masm); |
| 3266 | |
| 3267 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| 3268 | Label dont_need_remembered_set; |
| 3269 | |
| 3270 | Register val = regs_.scratch0(); |
| 3271 | __ Ldr(val, MemOperand(regs_.address())); |
| 3272 | __ JumpIfNotInNewSpace(val, &dont_need_remembered_set); |
| 3273 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3274 | __ JumpIfInNewSpace(regs_.object(), &dont_need_remembered_set); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3275 | |
| 3276 | // First notify the incremental marker if necessary, then update the |
| 3277 | // remembered set. |
| 3278 | CheckNeedsToInformIncrementalMarker( |
| 3279 | masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
| 3280 | InformIncrementalMarker(masm); |
| 3281 | regs_.Restore(masm); // Restore the extra scratch registers we used. |
| 3282 | |
| 3283 | __ RememberedSetHelper(object(), address(), |
| 3284 | value(), // scratch1 |
| 3285 | save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| 3286 | |
| 3287 | __ Bind(&dont_need_remembered_set); |
| 3288 | } |
| 3289 | |
| 3290 | CheckNeedsToInformIncrementalMarker( |
| 3291 | masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
| 3292 | InformIncrementalMarker(masm); |
| 3293 | regs_.Restore(masm); // Restore the extra scratch registers we used. |
| 3294 | __ Ret(); |
| 3295 | } |
| 3296 | |
| 3297 | |
| 3298 | void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm) { |
| 3299 | regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode()); |
| 3300 | Register address = |
| 3301 | x0.Is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
| 3302 | DCHECK(!address.Is(regs_.object())); |
| 3303 | DCHECK(!address.Is(x0)); |
| 3304 | __ Mov(address, regs_.address()); |
| 3305 | __ Mov(x0, regs_.object()); |
| 3306 | __ Mov(x1, address); |
| 3307 | __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| 3308 | |
| 3309 | AllowExternalCallThatCantCauseGC scope(masm); |
| 3310 | ExternalReference function = |
| 3311 | ExternalReference::incremental_marking_record_write_function( |
| 3312 | isolate()); |
| 3313 | __ CallCFunction(function, 3, 0); |
| 3314 | |
| 3315 | regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode()); |
| 3316 | } |
| 3317 | |
| 3318 | |
| 3319 | void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| 3320 | MacroAssembler* masm, |
| 3321 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 3322 | Mode mode) { |
| 3323 | Label on_black; |
| 3324 | Label need_incremental; |
| 3325 | Label need_incremental_pop_scratch; |
| 3326 | |
| 3327 | Register mem_chunk = regs_.scratch0(); |
| 3328 | Register counter = regs_.scratch1(); |
| 3329 | __ Bic(mem_chunk, regs_.object(), Page::kPageAlignmentMask); |
| 3330 | __ Ldr(counter, |
| 3331 | MemOperand(mem_chunk, MemoryChunk::kWriteBarrierCounterOffset)); |
| 3332 | __ Subs(counter, counter, 1); |
| 3333 | __ Str(counter, |
| 3334 | MemOperand(mem_chunk, MemoryChunk::kWriteBarrierCounterOffset)); |
| 3335 | __ B(mi, &need_incremental); |
| 3336 | |
| 3337 | // If the object is not black we don't have to inform the incremental marker. |
| 3338 | __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| 3339 | |
| 3340 | regs_.Restore(masm); // Restore the extra scratch registers we used. |
| 3341 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| 3342 | __ RememberedSetHelper(object(), address(), |
| 3343 | value(), // scratch1 |
| 3344 | save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| 3345 | } else { |
| 3346 | __ Ret(); |
| 3347 | } |
| 3348 | |
| 3349 | __ Bind(&on_black); |
| 3350 | // Get the value from the slot. |
| 3351 | Register val = regs_.scratch0(); |
| 3352 | __ Ldr(val, MemOperand(regs_.address())); |
| 3353 | |
| 3354 | if (mode == INCREMENTAL_COMPACTION) { |
| 3355 | Label ensure_not_white; |
| 3356 | |
| 3357 | __ CheckPageFlagClear(val, regs_.scratch1(), |
| 3358 | MemoryChunk::kEvacuationCandidateMask, |
| 3359 | &ensure_not_white); |
| 3360 | |
| 3361 | __ CheckPageFlagClear(regs_.object(), |
| 3362 | regs_.scratch1(), |
| 3363 | MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| 3364 | &need_incremental); |
| 3365 | |
| 3366 | __ Bind(&ensure_not_white); |
| 3367 | } |
| 3368 | |
| 3369 | // We need extra registers for this, so we push the object and the address |
| 3370 | // register temporarily. |
| 3371 | __ Push(regs_.address(), regs_.object()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3372 | __ JumpIfWhite(val, |
| 3373 | regs_.scratch1(), // Scratch. |
| 3374 | regs_.object(), // Scratch. |
| 3375 | regs_.address(), // Scratch. |
| 3376 | regs_.scratch2(), // Scratch. |
| 3377 | &need_incremental_pop_scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3378 | __ Pop(regs_.object(), regs_.address()); |
| 3379 | |
| 3380 | regs_.Restore(masm); // Restore the extra scratch registers we used. |
| 3381 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
| 3382 | __ RememberedSetHelper(object(), address(), |
| 3383 | value(), // scratch1 |
| 3384 | save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| 3385 | } else { |
| 3386 | __ Ret(); |
| 3387 | } |
| 3388 | |
| 3389 | __ Bind(&need_incremental_pop_scratch); |
| 3390 | __ Pop(regs_.object(), regs_.address()); |
| 3391 | |
| 3392 | __ Bind(&need_incremental); |
| 3393 | // Fall through when we need to inform the incremental marker. |
| 3394 | } |
| 3395 | |
| 3396 | |
| 3397 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 3398 | Label skip_to_incremental_noncompacting; |
| 3399 | Label skip_to_incremental_compacting; |
| 3400 | |
| 3401 | // We patch these two first instructions back and forth between a nop and |
| 3402 | // real branch when we start and stop incremental heap marking. |
| 3403 | // Initially the stub is expected to be in STORE_BUFFER_ONLY mode, so 2 nops |
| 3404 | // are generated. |
| 3405 | // See RecordWriteStub::Patch for details. |
| 3406 | { |
| 3407 | InstructionAccurateScope scope(masm, 2); |
| 3408 | __ adr(xzr, &skip_to_incremental_noncompacting); |
| 3409 | __ adr(xzr, &skip_to_incremental_compacting); |
| 3410 | } |
| 3411 | |
| 3412 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| 3413 | __ RememberedSetHelper(object(), address(), |
| 3414 | value(), // scratch1 |
| 3415 | save_fp_regs_mode(), MacroAssembler::kReturnAtEnd); |
| 3416 | } |
| 3417 | __ Ret(); |
| 3418 | |
| 3419 | __ Bind(&skip_to_incremental_noncompacting); |
| 3420 | GenerateIncremental(masm, INCREMENTAL); |
| 3421 | |
| 3422 | __ Bind(&skip_to_incremental_compacting); |
| 3423 | GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| 3424 | } |
| 3425 | |
| 3426 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3427 | void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
| 3428 | CEntryStub ces(isolate(), 1, kSaveFPRegs); |
| 3429 | __ Call(ces.GetCode(), RelocInfo::CODE_TARGET); |
| 3430 | int parameter_count_offset = |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3431 | StubFailureTrampolineFrameConstants::kArgumentsLengthOffset; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3432 | __ Ldr(x1, MemOperand(fp, parameter_count_offset)); |
| 3433 | if (function_mode() == JS_FUNCTION_STUB_MODE) { |
| 3434 | __ Add(x1, x1, 1); |
| 3435 | } |
| 3436 | masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
| 3437 | __ Drop(x1); |
| 3438 | // Return to IC Miss stub, continuation still on stack. |
| 3439 | __ Ret(); |
| 3440 | } |
| 3441 | |
| 3442 | |
| 3443 | void LoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3444 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3445 | LoadICStub stub(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3446 | stub.GenerateForTrampoline(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3447 | } |
| 3448 | |
| 3449 | |
| 3450 | void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3451 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3452 | KeyedLoadICStub stub(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3453 | stub.GenerateForTrampoline(masm); |
| 3454 | } |
| 3455 | |
| 3456 | |
| 3457 | void CallICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3458 | __ EmitLoadTypeFeedbackVector(x2); |
| 3459 | CallICStub stub(isolate(), state()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3460 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 3461 | } |
| 3462 | |
| 3463 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3464 | void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); } |
| 3465 | |
| 3466 | |
| 3467 | void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3468 | GenerateImpl(masm, true); |
| 3469 | } |
| 3470 | |
| 3471 | |
| 3472 | static void HandleArrayCases(MacroAssembler* masm, Register feedback, |
| 3473 | Register receiver_map, Register scratch1, |
| 3474 | Register scratch2, bool is_polymorphic, |
| 3475 | Label* miss) { |
| 3476 | // feedback initially contains the feedback array |
| 3477 | Label next_loop, prepare_next; |
| 3478 | Label load_smi_map, compare_map; |
| 3479 | Label start_polymorphic; |
| 3480 | |
| 3481 | Register cached_map = scratch1; |
| 3482 | |
| 3483 | __ Ldr(cached_map, |
| 3484 | FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(0))); |
| 3485 | __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3486 | __ Cmp(receiver_map, cached_map); |
| 3487 | __ B(ne, &start_polymorphic); |
| 3488 | // found, now call handler. |
| 3489 | Register handler = feedback; |
| 3490 | __ Ldr(handler, FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(1))); |
| 3491 | __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| 3492 | __ Jump(feedback); |
| 3493 | |
| 3494 | Register length = scratch2; |
| 3495 | __ Bind(&start_polymorphic); |
| 3496 | __ Ldr(length, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 3497 | if (!is_polymorphic) { |
| 3498 | __ Cmp(length, Operand(Smi::FromInt(2))); |
| 3499 | __ B(eq, miss); |
| 3500 | } |
| 3501 | |
| 3502 | Register too_far = length; |
| 3503 | Register pointer_reg = feedback; |
| 3504 | |
| 3505 | // +-----+------+------+-----+-----+ ... ----+ |
| 3506 | // | map | len | wm0 | h0 | wm1 | hN | |
| 3507 | // +-----+------+------+-----+-----+ ... ----+ |
| 3508 | // 0 1 2 len-1 |
| 3509 | // ^ ^ |
| 3510 | // | | |
| 3511 | // pointer_reg too_far |
| 3512 | // aka feedback scratch2 |
| 3513 | // also need receiver_map |
| 3514 | // use cached_map (scratch1) to look in the weak map values. |
| 3515 | __ Add(too_far, feedback, |
| 3516 | Operand::UntagSmiAndScale(length, kPointerSizeLog2)); |
| 3517 | __ Add(too_far, too_far, FixedArray::kHeaderSize - kHeapObjectTag); |
| 3518 | __ Add(pointer_reg, feedback, |
| 3519 | FixedArray::OffsetOfElementAt(2) - kHeapObjectTag); |
| 3520 | |
| 3521 | __ Bind(&next_loop); |
| 3522 | __ Ldr(cached_map, MemOperand(pointer_reg)); |
| 3523 | __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3524 | __ Cmp(receiver_map, cached_map); |
| 3525 | __ B(ne, &prepare_next); |
| 3526 | __ Ldr(handler, MemOperand(pointer_reg, kPointerSize)); |
| 3527 | __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| 3528 | __ Jump(handler); |
| 3529 | |
| 3530 | __ Bind(&prepare_next); |
| 3531 | __ Add(pointer_reg, pointer_reg, kPointerSize * 2); |
| 3532 | __ Cmp(pointer_reg, too_far); |
| 3533 | __ B(lt, &next_loop); |
| 3534 | |
| 3535 | // We exhausted our array of map handler pairs. |
| 3536 | __ jmp(miss); |
| 3537 | } |
| 3538 | |
| 3539 | |
| 3540 | static void HandleMonomorphicCase(MacroAssembler* masm, Register receiver, |
| 3541 | Register receiver_map, Register feedback, |
| 3542 | Register vector, Register slot, |
| 3543 | Register scratch, Label* compare_map, |
| 3544 | Label* load_smi_map, Label* try_array) { |
| 3545 | __ JumpIfSmi(receiver, load_smi_map); |
| 3546 | __ Ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 3547 | __ bind(compare_map); |
| 3548 | Register cached_map = scratch; |
| 3549 | // Move the weak map into the weak_cell register. |
| 3550 | __ Ldr(cached_map, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| 3551 | __ Cmp(cached_map, receiver_map); |
| 3552 | __ B(ne, try_array); |
| 3553 | |
| 3554 | Register handler = feedback; |
| 3555 | __ Add(handler, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3556 | __ Ldr(handler, |
| 3557 | FieldMemOperand(handler, FixedArray::kHeaderSize + kPointerSize)); |
| 3558 | __ Add(handler, handler, Code::kHeaderSize - kHeapObjectTag); |
| 3559 | __ Jump(handler); |
| 3560 | } |
| 3561 | |
| 3562 | |
| 3563 | void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3564 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // x1 |
| 3565 | Register name = LoadWithVectorDescriptor::NameRegister(); // x2 |
| 3566 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // x3 |
| 3567 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // x0 |
| 3568 | Register feedback = x4; |
| 3569 | Register receiver_map = x5; |
| 3570 | Register scratch1 = x6; |
| 3571 | |
| 3572 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3573 | __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3574 | |
| 3575 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3576 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3577 | // at WeakCell::kValueOffset. |
| 3578 | Label try_array, load_smi_map, compare_map; |
| 3579 | Label not_array, miss; |
| 3580 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3581 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3582 | |
| 3583 | // Is it a fixed array? |
| 3584 | __ Bind(&try_array); |
| 3585 | __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3586 | __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| 3587 | HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, true, &miss); |
| 3588 | |
| 3589 | __ Bind(¬_array); |
| 3590 | __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, &miss); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 3591 | Code::Flags code_flags = |
| 3592 | Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3593 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags, |
| 3594 | receiver, name, feedback, |
| 3595 | receiver_map, scratch1, x7); |
| 3596 | |
| 3597 | __ Bind(&miss); |
| 3598 | LoadIC::GenerateMiss(masm); |
| 3599 | |
| 3600 | __ Bind(&load_smi_map); |
| 3601 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3602 | __ jmp(&compare_map); |
| 3603 | } |
| 3604 | |
| 3605 | |
| 3606 | void KeyedLoadICStub::Generate(MacroAssembler* masm) { |
| 3607 | GenerateImpl(masm, false); |
| 3608 | } |
| 3609 | |
| 3610 | |
| 3611 | void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3612 | GenerateImpl(masm, true); |
| 3613 | } |
| 3614 | |
| 3615 | |
| 3616 | void KeyedLoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3617 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // x1 |
| 3618 | Register key = LoadWithVectorDescriptor::NameRegister(); // x2 |
| 3619 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // x3 |
| 3620 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // x0 |
| 3621 | Register feedback = x4; |
| 3622 | Register receiver_map = x5; |
| 3623 | Register scratch1 = x6; |
| 3624 | |
| 3625 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3626 | __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3627 | |
| 3628 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3629 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3630 | // at WeakCell::kValueOffset. |
| 3631 | Label try_array, load_smi_map, compare_map; |
| 3632 | Label not_array, miss; |
| 3633 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3634 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3635 | |
| 3636 | __ Bind(&try_array); |
| 3637 | // Is it a fixed array? |
| 3638 | __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3639 | __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| 3640 | |
| 3641 | // We have a polymorphic element handler. |
| 3642 | Label polymorphic, try_poly_name; |
| 3643 | __ Bind(&polymorphic); |
| 3644 | HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, true, &miss); |
| 3645 | |
| 3646 | __ Bind(¬_array); |
| 3647 | // Is it generic? |
| 3648 | __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, |
| 3649 | &try_poly_name); |
| 3650 | Handle<Code> megamorphic_stub = |
| 3651 | KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 3652 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 3653 | |
| 3654 | __ Bind(&try_poly_name); |
| 3655 | // We might have a name in feedback, and a fixed array in the next slot. |
| 3656 | __ Cmp(key, feedback); |
| 3657 | __ B(ne, &miss); |
| 3658 | // If the name comparison succeeded, we know we have a fixed array with |
| 3659 | // at least one map/handler pair. |
| 3660 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3661 | __ Ldr(feedback, |
| 3662 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 3663 | HandleArrayCases(masm, feedback, receiver_map, scratch1, x7, false, &miss); |
| 3664 | |
| 3665 | __ Bind(&miss); |
| 3666 | KeyedLoadIC::GenerateMiss(masm); |
| 3667 | |
| 3668 | __ Bind(&load_smi_map); |
| 3669 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3670 | __ jmp(&compare_map); |
| 3671 | } |
| 3672 | |
| 3673 | |
| 3674 | void VectorStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3675 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 3676 | VectorStoreICStub stub(isolate(), state()); |
| 3677 | stub.GenerateForTrampoline(masm); |
| 3678 | } |
| 3679 | |
| 3680 | |
| 3681 | void VectorKeyedStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3682 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 3683 | VectorKeyedStoreICStub stub(isolate(), state()); |
| 3684 | stub.GenerateForTrampoline(masm); |
| 3685 | } |
| 3686 | |
| 3687 | |
| 3688 | void VectorStoreICStub::Generate(MacroAssembler* masm) { |
| 3689 | GenerateImpl(masm, false); |
| 3690 | } |
| 3691 | |
| 3692 | |
| 3693 | void VectorStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3694 | GenerateImpl(masm, true); |
| 3695 | } |
| 3696 | |
| 3697 | |
| 3698 | void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3699 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // x1 |
| 3700 | Register key = VectorStoreICDescriptor::NameRegister(); // x2 |
| 3701 | Register vector = VectorStoreICDescriptor::VectorRegister(); // x3 |
| 3702 | Register slot = VectorStoreICDescriptor::SlotRegister(); // x4 |
| 3703 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(x0)); // x0 |
| 3704 | Register feedback = x5; |
| 3705 | Register receiver_map = x6; |
| 3706 | Register scratch1 = x7; |
| 3707 | |
| 3708 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3709 | __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3710 | |
| 3711 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3712 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3713 | // at WeakCell::kValueOffset. |
| 3714 | Label try_array, load_smi_map, compare_map; |
| 3715 | Label not_array, miss; |
| 3716 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3717 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3718 | |
| 3719 | // Is it a fixed array? |
| 3720 | __ Bind(&try_array); |
| 3721 | __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3722 | __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| 3723 | HandleArrayCases(masm, feedback, receiver_map, scratch1, x8, true, &miss); |
| 3724 | |
| 3725 | __ Bind(¬_array); |
| 3726 | __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, &miss); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 3727 | Code::Flags code_flags = |
| 3728 | Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3729 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, code_flags, |
| 3730 | receiver, key, feedback, |
| 3731 | receiver_map, scratch1, x8); |
| 3732 | |
| 3733 | __ Bind(&miss); |
| 3734 | StoreIC::GenerateMiss(masm); |
| 3735 | |
| 3736 | __ Bind(&load_smi_map); |
| 3737 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3738 | __ jmp(&compare_map); |
| 3739 | } |
| 3740 | |
| 3741 | |
| 3742 | void VectorKeyedStoreICStub::Generate(MacroAssembler* masm) { |
| 3743 | GenerateImpl(masm, false); |
| 3744 | } |
| 3745 | |
| 3746 | |
| 3747 | void VectorKeyedStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3748 | GenerateImpl(masm, true); |
| 3749 | } |
| 3750 | |
| 3751 | |
| 3752 | static void HandlePolymorphicStoreCase(MacroAssembler* masm, Register feedback, |
| 3753 | Register receiver_map, Register scratch1, |
| 3754 | Register scratch2, Label* miss) { |
| 3755 | // feedback initially contains the feedback array |
| 3756 | Label next_loop, prepare_next; |
| 3757 | Label start_polymorphic; |
| 3758 | Label transition_call; |
| 3759 | |
| 3760 | Register cached_map = scratch1; |
| 3761 | Register too_far = scratch2; |
| 3762 | Register pointer_reg = feedback; |
| 3763 | |
| 3764 | __ Ldr(too_far, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 3765 | |
| 3766 | // +-----+------+------+-----+-----+-----+ ... ----+ |
| 3767 | // | map | len | wm0 | wt0 | h0 | wm1 | hN | |
| 3768 | // +-----+------+------+-----+-----+ ----+ ... ----+ |
| 3769 | // 0 1 2 len-1 |
| 3770 | // ^ ^ |
| 3771 | // | | |
| 3772 | // pointer_reg too_far |
| 3773 | // aka feedback scratch2 |
| 3774 | // also need receiver_map |
| 3775 | // use cached_map (scratch1) to look in the weak map values. |
| 3776 | __ Add(too_far, feedback, |
| 3777 | Operand::UntagSmiAndScale(too_far, kPointerSizeLog2)); |
| 3778 | __ Add(too_far, too_far, FixedArray::kHeaderSize - kHeapObjectTag); |
| 3779 | __ Add(pointer_reg, feedback, |
| 3780 | FixedArray::OffsetOfElementAt(0) - kHeapObjectTag); |
| 3781 | |
| 3782 | __ Bind(&next_loop); |
| 3783 | __ Ldr(cached_map, MemOperand(pointer_reg)); |
| 3784 | __ Ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3785 | __ Cmp(receiver_map, cached_map); |
| 3786 | __ B(ne, &prepare_next); |
| 3787 | // Is it a transitioning store? |
| 3788 | __ Ldr(too_far, MemOperand(pointer_reg, kPointerSize)); |
| 3789 | __ CompareRoot(too_far, Heap::kUndefinedValueRootIndex); |
| 3790 | __ B(ne, &transition_call); |
| 3791 | |
| 3792 | __ Ldr(pointer_reg, MemOperand(pointer_reg, kPointerSize * 2)); |
| 3793 | __ Add(pointer_reg, pointer_reg, Code::kHeaderSize - kHeapObjectTag); |
| 3794 | __ Jump(pointer_reg); |
| 3795 | |
| 3796 | __ Bind(&transition_call); |
| 3797 | __ Ldr(too_far, FieldMemOperand(too_far, WeakCell::kValueOffset)); |
| 3798 | __ JumpIfSmi(too_far, miss); |
| 3799 | |
| 3800 | __ Ldr(receiver_map, MemOperand(pointer_reg, kPointerSize * 2)); |
| 3801 | // Load the map into the correct register. |
| 3802 | DCHECK(feedback.is(VectorStoreTransitionDescriptor::MapRegister())); |
| 3803 | __ mov(feedback, too_far); |
| 3804 | __ Add(receiver_map, receiver_map, Code::kHeaderSize - kHeapObjectTag); |
| 3805 | __ Jump(receiver_map); |
| 3806 | |
| 3807 | __ Bind(&prepare_next); |
| 3808 | __ Add(pointer_reg, pointer_reg, kPointerSize * 3); |
| 3809 | __ Cmp(pointer_reg, too_far); |
| 3810 | __ B(lt, &next_loop); |
| 3811 | |
| 3812 | // We exhausted our array of map handler pairs. |
| 3813 | __ jmp(miss); |
| 3814 | } |
| 3815 | |
| 3816 | |
| 3817 | void VectorKeyedStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3818 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // x1 |
| 3819 | Register key = VectorStoreICDescriptor::NameRegister(); // x2 |
| 3820 | Register vector = VectorStoreICDescriptor::VectorRegister(); // x3 |
| 3821 | Register slot = VectorStoreICDescriptor::SlotRegister(); // x4 |
| 3822 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(x0)); // x0 |
| 3823 | Register feedback = x5; |
| 3824 | Register receiver_map = x6; |
| 3825 | Register scratch1 = x7; |
| 3826 | |
| 3827 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3828 | __ Ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3829 | |
| 3830 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3831 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3832 | // at WeakCell::kValueOffset. |
| 3833 | Label try_array, load_smi_map, compare_map; |
| 3834 | Label not_array, miss; |
| 3835 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3836 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3837 | |
| 3838 | __ Bind(&try_array); |
| 3839 | // Is it a fixed array? |
| 3840 | __ Ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3841 | __ JumpIfNotRoot(scratch1, Heap::kFixedArrayMapRootIndex, ¬_array); |
| 3842 | |
| 3843 | // We have a polymorphic element handler. |
| 3844 | Label try_poly_name; |
| 3845 | HandlePolymorphicStoreCase(masm, feedback, receiver_map, scratch1, x8, &miss); |
| 3846 | |
| 3847 | __ Bind(¬_array); |
| 3848 | // Is it generic? |
| 3849 | __ JumpIfNotRoot(feedback, Heap::kmegamorphic_symbolRootIndex, |
| 3850 | &try_poly_name); |
| 3851 | Handle<Code> megamorphic_stub = |
| 3852 | KeyedStoreIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 3853 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 3854 | |
| 3855 | __ Bind(&try_poly_name); |
| 3856 | // We might have a name in feedback, and a fixed array in the next slot. |
| 3857 | __ Cmp(key, feedback); |
| 3858 | __ B(ne, &miss); |
| 3859 | // If the name comparison succeeded, we know we have a fixed array with |
| 3860 | // at least one map/handler pair. |
| 3861 | __ Add(feedback, vector, Operand::UntagSmiAndScale(slot, kPointerSizeLog2)); |
| 3862 | __ Ldr(feedback, |
| 3863 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 3864 | HandleArrayCases(masm, feedback, receiver_map, scratch1, x8, false, &miss); |
| 3865 | |
| 3866 | __ Bind(&miss); |
| 3867 | KeyedStoreIC::GenerateMiss(masm); |
| 3868 | |
| 3869 | __ Bind(&load_smi_map); |
| 3870 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3871 | __ jmp(&compare_map); |
| 3872 | } |
| 3873 | |
| 3874 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3875 | // The entry hook is a "BumpSystemStackPointer" instruction (sub), followed by |
| 3876 | // a "Push lr" instruction, followed by a call. |
| 3877 | static const unsigned int kProfileEntryHookCallSize = |
| 3878 | Assembler::kCallSizeWithRelocation + (2 * kInstructionSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3879 | |
| 3880 | |
| 3881 | void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
| 3882 | if (masm->isolate()->function_entry_hook() != NULL) { |
| 3883 | ProfileEntryHookStub stub(masm->isolate()); |
| 3884 | Assembler::BlockConstPoolScope no_const_pools(masm); |
| 3885 | DontEmitDebugCodeScope no_debug_code(masm); |
| 3886 | Label entry_hook_call_start; |
| 3887 | __ Bind(&entry_hook_call_start); |
| 3888 | __ Push(lr); |
| 3889 | __ CallStub(&stub); |
| 3890 | DCHECK(masm->SizeOfCodeGeneratedSince(&entry_hook_call_start) == |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3891 | kProfileEntryHookCallSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3892 | |
| 3893 | __ Pop(lr); |
| 3894 | } |
| 3895 | } |
| 3896 | |
| 3897 | |
| 3898 | void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| 3899 | MacroAssembler::NoUseRealAbortsScope no_use_real_aborts(masm); |
| 3900 | |
| 3901 | // Save all kCallerSaved registers (including lr), since this can be called |
| 3902 | // from anywhere. |
| 3903 | // TODO(jbramley): What about FP registers? |
| 3904 | __ PushCPURegList(kCallerSaved); |
| 3905 | DCHECK(kCallerSaved.IncludesAliasOf(lr)); |
| 3906 | const int kNumSavedRegs = kCallerSaved.Count(); |
| 3907 | |
| 3908 | // Compute the function's address as the first argument. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3909 | __ Sub(x0, lr, kProfileEntryHookCallSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3910 | |
| 3911 | #if V8_HOST_ARCH_ARM64 |
| 3912 | uintptr_t entry_hook = |
| 3913 | reinterpret_cast<uintptr_t>(isolate()->function_entry_hook()); |
| 3914 | __ Mov(x10, entry_hook); |
| 3915 | #else |
| 3916 | // Under the simulator we need to indirect the entry hook through a trampoline |
| 3917 | // function at a known address. |
| 3918 | ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
| 3919 | __ Mov(x10, Operand(ExternalReference(&dispatcher, |
| 3920 | ExternalReference::BUILTIN_CALL, |
| 3921 | isolate()))); |
| 3922 | // It additionally takes an isolate as a third parameter |
| 3923 | __ Mov(x2, ExternalReference::isolate_address(isolate())); |
| 3924 | #endif |
| 3925 | |
| 3926 | // The caller's return address is above the saved temporaries. |
| 3927 | // Grab its location for the second argument to the hook. |
| 3928 | __ Add(x1, __ StackPointer(), kNumSavedRegs * kPointerSize); |
| 3929 | |
| 3930 | { |
| 3931 | // Create a dummy frame, as CallCFunction requires this. |
| 3932 | FrameScope frame(masm, StackFrame::MANUAL); |
| 3933 | __ CallCFunction(x10, 2, 0); |
| 3934 | } |
| 3935 | |
| 3936 | __ PopCPURegList(kCallerSaved); |
| 3937 | __ Ret(); |
| 3938 | } |
| 3939 | |
| 3940 | |
| 3941 | void DirectCEntryStub::Generate(MacroAssembler* masm) { |
| 3942 | // When calling into C++ code the stack pointer must be csp. |
| 3943 | // Therefore this code must use csp for peek/poke operations when the |
| 3944 | // stub is generated. When the stub is called |
| 3945 | // (via DirectCEntryStub::GenerateCall), the caller must setup an ExitFrame |
| 3946 | // and configure the stack pointer *before* doing the call. |
| 3947 | const Register old_stack_pointer = __ StackPointer(); |
| 3948 | __ SetStackPointer(csp); |
| 3949 | |
| 3950 | // Put return address on the stack (accessible to GC through exit frame pc). |
| 3951 | __ Poke(lr, 0); |
| 3952 | // Call the C++ function. |
| 3953 | __ Blr(x10); |
| 3954 | // Return to calling code. |
| 3955 | __ Peek(lr, 0); |
| 3956 | __ AssertFPCRState(); |
| 3957 | __ Ret(); |
| 3958 | |
| 3959 | __ SetStackPointer(old_stack_pointer); |
| 3960 | } |
| 3961 | |
| 3962 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
| 3963 | Register target) { |
| 3964 | // Make sure the caller configured the stack pointer (see comment in |
| 3965 | // DirectCEntryStub::Generate). |
| 3966 | DCHECK(csp.Is(__ StackPointer())); |
| 3967 | |
| 3968 | intptr_t code = |
| 3969 | reinterpret_cast<intptr_t>(GetCode().location()); |
| 3970 | __ Mov(lr, Operand(code, RelocInfo::CODE_TARGET)); |
| 3971 | __ Mov(x10, target); |
| 3972 | // Branch to the stub. |
| 3973 | __ Blr(lr); |
| 3974 | } |
| 3975 | |
| 3976 | |
| 3977 | // Probe the name dictionary in the 'elements' register. |
| 3978 | // Jump to the 'done' label if a property with the given name is found. |
| 3979 | // Jump to the 'miss' label otherwise. |
| 3980 | // |
| 3981 | // If lookup was successful 'scratch2' will be equal to elements + 4 * index. |
| 3982 | // 'elements' and 'name' registers are preserved on miss. |
| 3983 | void NameDictionaryLookupStub::GeneratePositiveLookup( |
| 3984 | MacroAssembler* masm, |
| 3985 | Label* miss, |
| 3986 | Label* done, |
| 3987 | Register elements, |
| 3988 | Register name, |
| 3989 | Register scratch1, |
| 3990 | Register scratch2) { |
| 3991 | DCHECK(!AreAliased(elements, name, scratch1, scratch2)); |
| 3992 | |
| 3993 | // Assert that name contains a string. |
| 3994 | __ AssertName(name); |
| 3995 | |
| 3996 | // Compute the capacity mask. |
| 3997 | __ Ldrsw(scratch1, UntagSmiFieldMemOperand(elements, kCapacityOffset)); |
| 3998 | __ Sub(scratch1, scratch1, 1); |
| 3999 | |
| 4000 | // Generate an unrolled loop that performs a few probes before giving up. |
| 4001 | for (int i = 0; i < kInlinedProbes; i++) { |
| 4002 | // Compute the masked index: (hash + i + i * i) & mask. |
| 4003 | __ Ldr(scratch2, FieldMemOperand(name, Name::kHashFieldOffset)); |
| 4004 | if (i > 0) { |
| 4005 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 4006 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 4007 | // shifted in the following and instruction. |
| 4008 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 4009 | 1 << (32 - Name::kHashFieldOffset)); |
| 4010 | __ Add(scratch2, scratch2, Operand( |
| 4011 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
| 4012 | } |
| 4013 | __ And(scratch2, scratch1, Operand(scratch2, LSR, Name::kHashShift)); |
| 4014 | |
| 4015 | // Scale the index by multiplying by the element size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4016 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4017 | __ Add(scratch2, scratch2, Operand(scratch2, LSL, 1)); |
| 4018 | |
| 4019 | // Check if the key is identical to the name. |
| 4020 | UseScratchRegisterScope temps(masm); |
| 4021 | Register scratch3 = temps.AcquireX(); |
| 4022 | __ Add(scratch2, elements, Operand(scratch2, LSL, kPointerSizeLog2)); |
| 4023 | __ Ldr(scratch3, FieldMemOperand(scratch2, kElementsStartOffset)); |
| 4024 | __ Cmp(name, scratch3); |
| 4025 | __ B(eq, done); |
| 4026 | } |
| 4027 | |
| 4028 | // The inlined probes didn't find the entry. |
| 4029 | // Call the complete stub to scan the whole dictionary. |
| 4030 | |
| 4031 | CPURegList spill_list(CPURegister::kRegister, kXRegSizeInBits, 0, 6); |
| 4032 | spill_list.Combine(lr); |
| 4033 | spill_list.Remove(scratch1); |
| 4034 | spill_list.Remove(scratch2); |
| 4035 | |
| 4036 | __ PushCPURegList(spill_list); |
| 4037 | |
| 4038 | if (name.is(x0)) { |
| 4039 | DCHECK(!elements.is(x1)); |
| 4040 | __ Mov(x1, name); |
| 4041 | __ Mov(x0, elements); |
| 4042 | } else { |
| 4043 | __ Mov(x0, elements); |
| 4044 | __ Mov(x1, name); |
| 4045 | } |
| 4046 | |
| 4047 | Label not_found; |
| 4048 | NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP); |
| 4049 | __ CallStub(&stub); |
| 4050 | __ Cbz(x0, ¬_found); |
| 4051 | __ Mov(scratch2, x2); // Move entry index into scratch2. |
| 4052 | __ PopCPURegList(spill_list); |
| 4053 | __ B(done); |
| 4054 | |
| 4055 | __ Bind(¬_found); |
| 4056 | __ PopCPURegList(spill_list); |
| 4057 | __ B(miss); |
| 4058 | } |
| 4059 | |
| 4060 | |
| 4061 | void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| 4062 | Label* miss, |
| 4063 | Label* done, |
| 4064 | Register receiver, |
| 4065 | Register properties, |
| 4066 | Handle<Name> name, |
| 4067 | Register scratch0) { |
| 4068 | DCHECK(!AreAliased(receiver, properties, scratch0)); |
| 4069 | DCHECK(name->IsUniqueName()); |
| 4070 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 4071 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 4072 | // undefined value), it guarantees the hash table doesn't contain the |
| 4073 | // property. It's true even if some slots represent deleted properties |
| 4074 | // (their names are the hole value). |
| 4075 | for (int i = 0; i < kInlinedProbes; i++) { |
| 4076 | // scratch0 points to properties hash. |
| 4077 | // Compute the masked index: (hash + i + i * i) & mask. |
| 4078 | Register index = scratch0; |
| 4079 | // Capacity is smi 2^n. |
| 4080 | __ Ldrsw(index, UntagSmiFieldMemOperand(properties, kCapacityOffset)); |
| 4081 | __ Sub(index, index, 1); |
| 4082 | __ And(index, index, name->Hash() + NameDictionary::GetProbeOffset(i)); |
| 4083 | |
| 4084 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4085 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4086 | __ Add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 4087 | |
| 4088 | Register entity_name = scratch0; |
| 4089 | // Having undefined at this place means the name is not contained. |
| 4090 | Register tmp = index; |
| 4091 | __ Add(tmp, properties, Operand(index, LSL, kPointerSizeLog2)); |
| 4092 | __ Ldr(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| 4093 | |
| 4094 | __ JumpIfRoot(entity_name, Heap::kUndefinedValueRootIndex, done); |
| 4095 | |
| 4096 | // Stop if found the property. |
| 4097 | __ Cmp(entity_name, Operand(name)); |
| 4098 | __ B(eq, miss); |
| 4099 | |
| 4100 | Label good; |
| 4101 | __ JumpIfRoot(entity_name, Heap::kTheHoleValueRootIndex, &good); |
| 4102 | |
| 4103 | // Check if the entry name is not a unique name. |
| 4104 | __ Ldr(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| 4105 | __ Ldrb(entity_name, |
| 4106 | FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| 4107 | __ JumpIfNotUniqueNameInstanceType(entity_name, miss); |
| 4108 | __ Bind(&good); |
| 4109 | } |
| 4110 | |
| 4111 | CPURegList spill_list(CPURegister::kRegister, kXRegSizeInBits, 0, 6); |
| 4112 | spill_list.Combine(lr); |
| 4113 | spill_list.Remove(scratch0); // Scratch registers don't need to be preserved. |
| 4114 | |
| 4115 | __ PushCPURegList(spill_list); |
| 4116 | |
| 4117 | __ Ldr(x0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 4118 | __ Mov(x1, Operand(name)); |
| 4119 | NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); |
| 4120 | __ CallStub(&stub); |
| 4121 | // Move stub return value to scratch0. Note that scratch0 is not included in |
| 4122 | // spill_list and won't be clobbered by PopCPURegList. |
| 4123 | __ Mov(scratch0, x0); |
| 4124 | __ PopCPURegList(spill_list); |
| 4125 | |
| 4126 | __ Cbz(scratch0, done); |
| 4127 | __ B(miss); |
| 4128 | } |
| 4129 | |
| 4130 | |
| 4131 | void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
| 4132 | // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| 4133 | // we cannot call anything that could cause a GC from this stub. |
| 4134 | // |
| 4135 | // Arguments are in x0 and x1: |
| 4136 | // x0: property dictionary. |
| 4137 | // x1: the name of the property we are looking for. |
| 4138 | // |
| 4139 | // Return value is in x0 and is zero if lookup failed, non zero otherwise. |
| 4140 | // If the lookup is successful, x2 will contains the index of the entry. |
| 4141 | |
| 4142 | Register result = x0; |
| 4143 | Register dictionary = x0; |
| 4144 | Register key = x1; |
| 4145 | Register index = x2; |
| 4146 | Register mask = x3; |
| 4147 | Register hash = x4; |
| 4148 | Register undefined = x5; |
| 4149 | Register entry_key = x6; |
| 4150 | |
| 4151 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 4152 | |
| 4153 | __ Ldrsw(mask, UntagSmiFieldMemOperand(dictionary, kCapacityOffset)); |
| 4154 | __ Sub(mask, mask, 1); |
| 4155 | |
| 4156 | __ Ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
| 4157 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 4158 | |
| 4159 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 4160 | // Compute the masked index: (hash + i + i * i) & mask. |
| 4161 | // Capacity is smi 2^n. |
| 4162 | if (i > 0) { |
| 4163 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 4164 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 4165 | // shifted in the following and instruction. |
| 4166 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 4167 | 1 << (32 - Name::kHashFieldOffset)); |
| 4168 | __ Add(index, hash, |
| 4169 | NameDictionary::GetProbeOffset(i) << Name::kHashShift); |
| 4170 | } else { |
| 4171 | __ Mov(index, hash); |
| 4172 | } |
| 4173 | __ And(index, mask, Operand(index, LSR, Name::kHashShift)); |
| 4174 | |
| 4175 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4176 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4177 | __ Add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 4178 | |
| 4179 | __ Add(index, dictionary, Operand(index, LSL, kPointerSizeLog2)); |
| 4180 | __ Ldr(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| 4181 | |
| 4182 | // Having undefined at this place means the name is not contained. |
| 4183 | __ Cmp(entry_key, undefined); |
| 4184 | __ B(eq, ¬_in_dictionary); |
| 4185 | |
| 4186 | // Stop if found the property. |
| 4187 | __ Cmp(entry_key, key); |
| 4188 | __ B(eq, &in_dictionary); |
| 4189 | |
| 4190 | if (i != kTotalProbes - 1 && mode() == NEGATIVE_LOOKUP) { |
| 4191 | // Check if the entry name is not a unique name. |
| 4192 | __ Ldr(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| 4193 | __ Ldrb(entry_key, FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
| 4194 | __ JumpIfNotUniqueNameInstanceType(entry_key, &maybe_in_dictionary); |
| 4195 | } |
| 4196 | } |
| 4197 | |
| 4198 | __ Bind(&maybe_in_dictionary); |
| 4199 | // If we are doing negative lookup then probing failure should be |
| 4200 | // treated as a lookup success. For positive lookup, probing failure |
| 4201 | // should be treated as lookup failure. |
| 4202 | if (mode() == POSITIVE_LOOKUP) { |
| 4203 | __ Mov(result, 0); |
| 4204 | __ Ret(); |
| 4205 | } |
| 4206 | |
| 4207 | __ Bind(&in_dictionary); |
| 4208 | __ Mov(result, 1); |
| 4209 | __ Ret(); |
| 4210 | |
| 4211 | __ Bind(¬_in_dictionary); |
| 4212 | __ Mov(result, 0); |
| 4213 | __ Ret(); |
| 4214 | } |
| 4215 | |
| 4216 | |
| 4217 | template<class T> |
| 4218 | static void CreateArrayDispatch(MacroAssembler* masm, |
| 4219 | AllocationSiteOverrideMode mode) { |
| 4220 | ASM_LOCATION("CreateArrayDispatch"); |
| 4221 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4222 | T stub(masm->isolate(), GetInitialFastElementsKind(), mode); |
| 4223 | __ TailCallStub(&stub); |
| 4224 | |
| 4225 | } else if (mode == DONT_OVERRIDE) { |
| 4226 | Register kind = x3; |
| 4227 | int last_index = |
| 4228 | GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| 4229 | for (int i = 0; i <= last_index; ++i) { |
| 4230 | Label next; |
| 4231 | ElementsKind candidate_kind = GetFastElementsKindFromSequenceIndex(i); |
| 4232 | // TODO(jbramley): Is this the best way to handle this? Can we make the |
| 4233 | // tail calls conditional, rather than hopping over each one? |
| 4234 | __ CompareAndBranch(kind, candidate_kind, ne, &next); |
| 4235 | T stub(masm->isolate(), candidate_kind); |
| 4236 | __ TailCallStub(&stub); |
| 4237 | __ Bind(&next); |
| 4238 | } |
| 4239 | |
| 4240 | // If we reached this point there is a problem. |
| 4241 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4242 | |
| 4243 | } else { |
| 4244 | UNREACHABLE(); |
| 4245 | } |
| 4246 | } |
| 4247 | |
| 4248 | |
| 4249 | // TODO(jbramley): If this needs to be a special case, make it a proper template |
| 4250 | // specialization, and not a separate function. |
| 4251 | static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| 4252 | AllocationSiteOverrideMode mode) { |
| 4253 | ASM_LOCATION("CreateArrayDispatchOneArgument"); |
| 4254 | // x0 - argc |
| 4255 | // x1 - constructor? |
| 4256 | // x2 - allocation site (if mode != DISABLE_ALLOCATION_SITES) |
| 4257 | // x3 - kind (if mode != DISABLE_ALLOCATION_SITES) |
| 4258 | // sp[0] - last argument |
| 4259 | |
| 4260 | Register allocation_site = x2; |
| 4261 | Register kind = x3; |
| 4262 | |
| 4263 | Label normal_sequence; |
| 4264 | if (mode == DONT_OVERRIDE) { |
| 4265 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 4266 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 4267 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 4268 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| 4269 | STATIC_ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| 4270 | STATIC_ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
| 4271 | |
| 4272 | // Is the low bit set? If so, the array is holey. |
| 4273 | __ Tbnz(kind, 0, &normal_sequence); |
| 4274 | } |
| 4275 | |
| 4276 | // Look at the last argument. |
| 4277 | // TODO(jbramley): What does a 0 argument represent? |
| 4278 | __ Peek(x10, 0); |
| 4279 | __ Cbz(x10, &normal_sequence); |
| 4280 | |
| 4281 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4282 | ElementsKind initial = GetInitialFastElementsKind(); |
| 4283 | ElementsKind holey_initial = GetHoleyElementsKind(initial); |
| 4284 | |
| 4285 | ArraySingleArgumentConstructorStub stub_holey(masm->isolate(), |
| 4286 | holey_initial, |
| 4287 | DISABLE_ALLOCATION_SITES); |
| 4288 | __ TailCallStub(&stub_holey); |
| 4289 | |
| 4290 | __ Bind(&normal_sequence); |
| 4291 | ArraySingleArgumentConstructorStub stub(masm->isolate(), |
| 4292 | initial, |
| 4293 | DISABLE_ALLOCATION_SITES); |
| 4294 | __ TailCallStub(&stub); |
| 4295 | } else if (mode == DONT_OVERRIDE) { |
| 4296 | // We are going to create a holey array, but our kind is non-holey. |
| 4297 | // Fix kind and retry (only if we have an allocation site in the slot). |
| 4298 | __ Orr(kind, kind, 1); |
| 4299 | |
| 4300 | if (FLAG_debug_code) { |
| 4301 | __ Ldr(x10, FieldMemOperand(allocation_site, 0)); |
| 4302 | __ JumpIfNotRoot(x10, Heap::kAllocationSiteMapRootIndex, |
| 4303 | &normal_sequence); |
| 4304 | __ Assert(eq, kExpectedAllocationSite); |
| 4305 | } |
| 4306 | |
| 4307 | // Save the resulting elements kind in type info. We can't just store 'kind' |
| 4308 | // in the AllocationSite::transition_info field because elements kind is |
| 4309 | // restricted to a portion of the field; upper bits need to be left alone. |
| 4310 | STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| 4311 | __ Ldr(x11, FieldMemOperand(allocation_site, |
| 4312 | AllocationSite::kTransitionInfoOffset)); |
| 4313 | __ Add(x11, x11, Smi::FromInt(kFastElementsKindPackedToHoley)); |
| 4314 | __ Str(x11, FieldMemOperand(allocation_site, |
| 4315 | AllocationSite::kTransitionInfoOffset)); |
| 4316 | |
| 4317 | __ Bind(&normal_sequence); |
| 4318 | int last_index = |
| 4319 | GetSequenceIndexFromFastElementsKind(TERMINAL_FAST_ELEMENTS_KIND); |
| 4320 | for (int i = 0; i <= last_index; ++i) { |
| 4321 | Label next; |
| 4322 | ElementsKind candidate_kind = GetFastElementsKindFromSequenceIndex(i); |
| 4323 | __ CompareAndBranch(kind, candidate_kind, ne, &next); |
| 4324 | ArraySingleArgumentConstructorStub stub(masm->isolate(), candidate_kind); |
| 4325 | __ TailCallStub(&stub); |
| 4326 | __ Bind(&next); |
| 4327 | } |
| 4328 | |
| 4329 | // If we reached this point there is a problem. |
| 4330 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4331 | } else { |
| 4332 | UNREACHABLE(); |
| 4333 | } |
| 4334 | } |
| 4335 | |
| 4336 | |
| 4337 | template<class T> |
| 4338 | static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
| 4339 | int to_index = GetSequenceIndexFromFastElementsKind( |
| 4340 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4341 | for (int i = 0; i <= to_index; ++i) { |
| 4342 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4343 | T stub(isolate, kind); |
| 4344 | stub.GetCode(); |
| 4345 | if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) { |
| 4346 | T stub1(isolate, kind, DISABLE_ALLOCATION_SITES); |
| 4347 | stub1.GetCode(); |
| 4348 | } |
| 4349 | } |
| 4350 | } |
| 4351 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4352 | void CommonArrayConstructorStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4353 | ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| 4354 | isolate); |
| 4355 | ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>( |
| 4356 | isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4357 | ArrayNArgumentsConstructorStub stub(isolate); |
| 4358 | stub.GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4359 | ElementsKind kinds[2] = { FAST_ELEMENTS, FAST_HOLEY_ELEMENTS }; |
| 4360 | for (int i = 0; i < 2; i++) { |
| 4361 | // For internal arrays we only need a few things |
| 4362 | InternalArrayNoArgumentConstructorStub stubh1(isolate, kinds[i]); |
| 4363 | stubh1.GetCode(); |
| 4364 | InternalArraySingleArgumentConstructorStub stubh2(isolate, kinds[i]); |
| 4365 | stubh2.GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4366 | } |
| 4367 | } |
| 4368 | |
| 4369 | |
| 4370 | void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| 4371 | MacroAssembler* masm, |
| 4372 | AllocationSiteOverrideMode mode) { |
| 4373 | Register argc = x0; |
| 4374 | if (argument_count() == ANY) { |
| 4375 | Label zero_case, n_case; |
| 4376 | __ Cbz(argc, &zero_case); |
| 4377 | __ Cmp(argc, 1); |
| 4378 | __ B(ne, &n_case); |
| 4379 | |
| 4380 | // One argument. |
| 4381 | CreateArrayDispatchOneArgument(masm, mode); |
| 4382 | |
| 4383 | __ Bind(&zero_case); |
| 4384 | // No arguments. |
| 4385 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4386 | |
| 4387 | __ Bind(&n_case); |
| 4388 | // N arguments. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4389 | ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| 4390 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4391 | } else if (argument_count() == NONE) { |
| 4392 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4393 | } else if (argument_count() == ONE) { |
| 4394 | CreateArrayDispatchOneArgument(masm, mode); |
| 4395 | } else if (argument_count() == MORE_THAN_ONE) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4396 | ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| 4397 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4398 | } else { |
| 4399 | UNREACHABLE(); |
| 4400 | } |
| 4401 | } |
| 4402 | |
| 4403 | |
| 4404 | void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4405 | ASM_LOCATION("ArrayConstructorStub::Generate"); |
| 4406 | // ----------- S t a t e ------------- |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4407 | // -- x0 : argc (only if argument_count() is ANY or MORE_THAN_ONE) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4408 | // -- x1 : constructor |
| 4409 | // -- x2 : AllocationSite or undefined |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4410 | // -- x3 : new target |
| 4411 | // -- sp[0] : last argument |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4412 | // ----------------------------------- |
| 4413 | Register constructor = x1; |
| 4414 | Register allocation_site = x2; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4415 | Register new_target = x3; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4416 | |
| 4417 | if (FLAG_debug_code) { |
| 4418 | // The array construct code is only set for the global and natives |
| 4419 | // builtin Array functions which always have maps. |
| 4420 | |
| 4421 | Label unexpected_map, map_ok; |
| 4422 | // Initial map for the builtin Array function should be a map. |
| 4423 | __ Ldr(x10, FieldMemOperand(constructor, |
| 4424 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 4425 | // Will both indicate a NULL and a Smi. |
| 4426 | __ JumpIfSmi(x10, &unexpected_map); |
| 4427 | __ JumpIfObjectType(x10, x10, x11, MAP_TYPE, &map_ok); |
| 4428 | __ Bind(&unexpected_map); |
| 4429 | __ Abort(kUnexpectedInitialMapForArrayFunction); |
| 4430 | __ Bind(&map_ok); |
| 4431 | |
| 4432 | // We should either have undefined in the allocation_site register or a |
| 4433 | // valid AllocationSite. |
| 4434 | __ AssertUndefinedOrAllocationSite(allocation_site, x10); |
| 4435 | } |
| 4436 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4437 | // Enter the context of the Array function. |
| 4438 | __ Ldr(cp, FieldMemOperand(x1, JSFunction::kContextOffset)); |
| 4439 | |
| 4440 | Label subclassing; |
| 4441 | __ Cmp(new_target, constructor); |
| 4442 | __ B(ne, &subclassing); |
| 4443 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4444 | Register kind = x3; |
| 4445 | Label no_info; |
| 4446 | // Get the elements kind and case on that. |
| 4447 | __ JumpIfRoot(allocation_site, Heap::kUndefinedValueRootIndex, &no_info); |
| 4448 | |
| 4449 | __ Ldrsw(kind, |
| 4450 | UntagSmiFieldMemOperand(allocation_site, |
| 4451 | AllocationSite::kTransitionInfoOffset)); |
| 4452 | __ And(kind, kind, AllocationSite::ElementsKindBits::kMask); |
| 4453 | GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| 4454 | |
| 4455 | __ Bind(&no_info); |
| 4456 | GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4457 | |
| 4458 | // Subclassing support. |
| 4459 | __ Bind(&subclassing); |
| 4460 | switch (argument_count()) { |
| 4461 | case ANY: |
| 4462 | case MORE_THAN_ONE: |
| 4463 | __ Poke(constructor, Operand(x0, LSL, kPointerSizeLog2)); |
| 4464 | __ Add(x0, x0, Operand(3)); |
| 4465 | break; |
| 4466 | case NONE: |
| 4467 | __ Poke(constructor, 0 * kPointerSize); |
| 4468 | __ Mov(x0, Operand(3)); |
| 4469 | break; |
| 4470 | case ONE: |
| 4471 | __ Poke(constructor, 1 * kPointerSize); |
| 4472 | __ Mov(x0, Operand(4)); |
| 4473 | break; |
| 4474 | } |
| 4475 | __ Push(new_target, allocation_site); |
| 4476 | __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4477 | } |
| 4478 | |
| 4479 | |
| 4480 | void InternalArrayConstructorStub::GenerateCase( |
| 4481 | MacroAssembler* masm, ElementsKind kind) { |
| 4482 | Label zero_case, n_case; |
| 4483 | Register argc = x0; |
| 4484 | |
| 4485 | __ Cbz(argc, &zero_case); |
| 4486 | __ CompareAndBranch(argc, 1, ne, &n_case); |
| 4487 | |
| 4488 | // One argument. |
| 4489 | if (IsFastPackedElementsKind(kind)) { |
| 4490 | Label packed_case; |
| 4491 | |
| 4492 | // We might need to create a holey array; look at the first argument. |
| 4493 | __ Peek(x10, 0); |
| 4494 | __ Cbz(x10, &packed_case); |
| 4495 | |
| 4496 | InternalArraySingleArgumentConstructorStub |
| 4497 | stub1_holey(isolate(), GetHoleyElementsKind(kind)); |
| 4498 | __ TailCallStub(&stub1_holey); |
| 4499 | |
| 4500 | __ Bind(&packed_case); |
| 4501 | } |
| 4502 | InternalArraySingleArgumentConstructorStub stub1(isolate(), kind); |
| 4503 | __ TailCallStub(&stub1); |
| 4504 | |
| 4505 | __ Bind(&zero_case); |
| 4506 | // No arguments. |
| 4507 | InternalArrayNoArgumentConstructorStub stub0(isolate(), kind); |
| 4508 | __ TailCallStub(&stub0); |
| 4509 | |
| 4510 | __ Bind(&n_case); |
| 4511 | // N arguments. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4512 | ArrayNArgumentsConstructorStub stubN(isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4513 | __ TailCallStub(&stubN); |
| 4514 | } |
| 4515 | |
| 4516 | |
| 4517 | void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4518 | // ----------- S t a t e ------------- |
| 4519 | // -- x0 : argc |
| 4520 | // -- x1 : constructor |
| 4521 | // -- sp[0] : return address |
| 4522 | // -- sp[4] : last argument |
| 4523 | // ----------------------------------- |
| 4524 | |
| 4525 | Register constructor = x1; |
| 4526 | |
| 4527 | if (FLAG_debug_code) { |
| 4528 | // The array construct code is only set for the global and natives |
| 4529 | // builtin Array functions which always have maps. |
| 4530 | |
| 4531 | Label unexpected_map, map_ok; |
| 4532 | // Initial map for the builtin Array function should be a map. |
| 4533 | __ Ldr(x10, FieldMemOperand(constructor, |
| 4534 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 4535 | // Will both indicate a NULL and a Smi. |
| 4536 | __ JumpIfSmi(x10, &unexpected_map); |
| 4537 | __ JumpIfObjectType(x10, x10, x11, MAP_TYPE, &map_ok); |
| 4538 | __ Bind(&unexpected_map); |
| 4539 | __ Abort(kUnexpectedInitialMapForArrayFunction); |
| 4540 | __ Bind(&map_ok); |
| 4541 | } |
| 4542 | |
| 4543 | Register kind = w3; |
| 4544 | // Figure out the right elements kind |
| 4545 | __ Ldr(x10, FieldMemOperand(constructor, |
| 4546 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 4547 | |
| 4548 | // Retrieve elements_kind from map. |
| 4549 | __ LoadElementsKindFromMap(kind, x10); |
| 4550 | |
| 4551 | if (FLAG_debug_code) { |
| 4552 | Label done; |
| 4553 | __ Cmp(x3, FAST_ELEMENTS); |
| 4554 | __ Ccmp(x3, FAST_HOLEY_ELEMENTS, ZFlag, ne); |
| 4555 | __ Assert(eq, kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
| 4556 | } |
| 4557 | |
| 4558 | Label fast_elements_case; |
| 4559 | __ CompareAndBranch(kind, FAST_ELEMENTS, eq, &fast_elements_case); |
| 4560 | GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| 4561 | |
| 4562 | __ Bind(&fast_elements_case); |
| 4563 | GenerateCase(masm, FAST_ELEMENTS); |
| 4564 | } |
| 4565 | |
| 4566 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4567 | void FastNewObjectStub::Generate(MacroAssembler* masm) { |
| 4568 | // ----------- S t a t e ------------- |
| 4569 | // -- x1 : target |
| 4570 | // -- x3 : new target |
| 4571 | // -- cp : context |
| 4572 | // -- lr : return address |
| 4573 | // ----------------------------------- |
| 4574 | __ AssertFunction(x1); |
| 4575 | __ AssertReceiver(x3); |
| 4576 | |
| 4577 | // Verify that the new target is a JSFunction. |
| 4578 | Label new_object; |
| 4579 | __ JumpIfNotObjectType(x3, x2, x2, JS_FUNCTION_TYPE, &new_object); |
| 4580 | |
| 4581 | // Load the initial map and verify that it's in fact a map. |
| 4582 | __ Ldr(x2, FieldMemOperand(x3, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4583 | __ JumpIfSmi(x2, &new_object); |
| 4584 | __ JumpIfNotObjectType(x2, x0, x0, MAP_TYPE, &new_object); |
| 4585 | |
| 4586 | // Fall back to runtime if the target differs from the new target's |
| 4587 | // initial map constructor. |
| 4588 | __ Ldr(x0, FieldMemOperand(x2, Map::kConstructorOrBackPointerOffset)); |
| 4589 | __ CompareAndBranch(x0, x1, ne, &new_object); |
| 4590 | |
| 4591 | // Allocate the JSObject on the heap. |
| 4592 | Label allocate, done_allocate; |
| 4593 | __ Ldrb(x4, FieldMemOperand(x2, Map::kInstanceSizeOffset)); |
| 4594 | __ Allocate(x4, x0, x5, x6, &allocate, SIZE_IN_WORDS); |
| 4595 | __ Bind(&done_allocate); |
| 4596 | |
| 4597 | // Initialize the JSObject fields. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4598 | STATIC_ASSERT(JSObject::kMapOffset == 0 * kPointerSize); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4599 | __ Str(x2, FieldMemOperand(x0, JSObject::kMapOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4600 | __ LoadRoot(x3, Heap::kEmptyFixedArrayRootIndex); |
| 4601 | STATIC_ASSERT(JSObject::kPropertiesOffset == 1 * kPointerSize); |
| 4602 | STATIC_ASSERT(JSObject::kElementsOffset == 2 * kPointerSize); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4603 | __ Str(x3, FieldMemOperand(x0, JSObject::kPropertiesOffset)); |
| 4604 | __ Str(x3, FieldMemOperand(x0, JSObject::kElementsOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4605 | STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4606 | __ Add(x1, x0, Operand(JSObject::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4607 | |
| 4608 | // ----------- S t a t e ------------- |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4609 | // -- x0 : result (tagged) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4610 | // -- x1 : result fields (untagged) |
| 4611 | // -- x5 : result end (untagged) |
| 4612 | // -- x2 : initial map |
| 4613 | // -- cp : context |
| 4614 | // -- lr : return address |
| 4615 | // ----------------------------------- |
| 4616 | |
| 4617 | // Perform in-object slack tracking if requested. |
| 4618 | Label slack_tracking; |
| 4619 | STATIC_ASSERT(Map::kNoSlackTracking == 0); |
| 4620 | __ LoadRoot(x6, Heap::kUndefinedValueRootIndex); |
| 4621 | __ Ldr(w3, FieldMemOperand(x2, Map::kBitField3Offset)); |
| 4622 | __ TestAndBranchIfAnySet(w3, Map::ConstructionCounter::kMask, |
| 4623 | &slack_tracking); |
| 4624 | { |
| 4625 | // Initialize all in-object fields with undefined. |
| 4626 | __ InitializeFieldsWithFiller(x1, x5, x6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4627 | __ Ret(); |
| 4628 | } |
| 4629 | __ Bind(&slack_tracking); |
| 4630 | { |
| 4631 | // Decrease generous allocation count. |
| 4632 | STATIC_ASSERT(Map::ConstructionCounter::kNext == 32); |
| 4633 | __ Sub(w3, w3, 1 << Map::ConstructionCounter::kShift); |
| 4634 | __ Str(w3, FieldMemOperand(x2, Map::kBitField3Offset)); |
| 4635 | |
| 4636 | // Initialize the in-object fields with undefined. |
| 4637 | __ Ldrb(x4, FieldMemOperand(x2, Map::kUnusedPropertyFieldsOffset)); |
| 4638 | __ Sub(x4, x5, Operand(x4, LSL, kPointerSizeLog2)); |
| 4639 | __ InitializeFieldsWithFiller(x1, x4, x6); |
| 4640 | |
| 4641 | // Initialize the remaining (reserved) fields with one pointer filler map. |
| 4642 | __ LoadRoot(x6, Heap::kOnePointerFillerMapRootIndex); |
| 4643 | __ InitializeFieldsWithFiller(x1, x5, x6); |
| 4644 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4645 | // Check if we can finalize the instance size. |
| 4646 | Label finalize; |
| 4647 | STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1); |
| 4648 | __ TestAndBranchIfAllClear(w3, Map::ConstructionCounter::kMask, &finalize); |
| 4649 | __ Ret(); |
| 4650 | |
| 4651 | // Finalize the instance size. |
| 4652 | __ Bind(&finalize); |
| 4653 | { |
| 4654 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4655 | __ Push(x0, x2); |
| 4656 | __ CallRuntime(Runtime::kFinalizeInstanceSize); |
| 4657 | __ Pop(x0); |
| 4658 | } |
| 4659 | __ Ret(); |
| 4660 | } |
| 4661 | |
| 4662 | // Fall back to %AllocateInNewSpace. |
| 4663 | __ Bind(&allocate); |
| 4664 | { |
| 4665 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4666 | STATIC_ASSERT(kSmiTag == 0); |
| 4667 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4668 | __ Mov(x4, |
| 4669 | Operand(x4, LSL, kPointerSizeLog2 + kSmiTagSize + kSmiShiftSize)); |
| 4670 | __ Push(x2, x4); |
| 4671 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4672 | __ Pop(x2); |
| 4673 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4674 | __ Ldrb(x5, FieldMemOperand(x2, Map::kInstanceSizeOffset)); |
| 4675 | __ Add(x5, x0, Operand(x5, LSL, kPointerSizeLog2)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4676 | STATIC_ASSERT(kHeapObjectTag == 1); |
| 4677 | __ Sub(x5, x5, kHeapObjectTag); // Subtract the tag from end. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4678 | __ B(&done_allocate); |
| 4679 | |
| 4680 | // Fall back to %NewObject. |
| 4681 | __ Bind(&new_object); |
| 4682 | __ Push(x1, x3); |
| 4683 | __ TailCallRuntime(Runtime::kNewObject); |
| 4684 | } |
| 4685 | |
| 4686 | |
| 4687 | void FastNewRestParameterStub::Generate(MacroAssembler* masm) { |
| 4688 | // ----------- S t a t e ------------- |
| 4689 | // -- x1 : function |
| 4690 | // -- cp : context |
| 4691 | // -- fp : frame pointer |
| 4692 | // -- lr : return address |
| 4693 | // ----------------------------------- |
| 4694 | __ AssertFunction(x1); |
| 4695 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4696 | // Make x2 point to the JavaScript frame. |
| 4697 | __ Mov(x2, fp); |
| 4698 | if (skip_stub_frame()) { |
| 4699 | // For Ignition we need to skip the handler/stub frame to reach the |
| 4700 | // JavaScript frame for the function. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4701 | __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4702 | } |
| 4703 | if (FLAG_debug_code) { |
| 4704 | Label ok; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4705 | __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kFunctionOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4706 | __ Cmp(x3, x1); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4707 | __ B(eq, &ok); |
| 4708 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 4709 | __ Bind(&ok); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4710 | } |
| 4711 | |
| 4712 | // Check if we have rest parameters (only possible if we have an |
| 4713 | // arguments adaptor frame below the function frame). |
| 4714 | Label no_rest_parameters; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4715 | __ Ldr(x2, MemOperand(x2, CommonFrameConstants::kCallerFPOffset)); |
| 4716 | __ Ldr(x3, MemOperand(x2, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4717 | __ Cmp(x3, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| 4718 | __ B(ne, &no_rest_parameters); |
| 4719 | |
| 4720 | // Check if the arguments adaptor frame contains more arguments than |
| 4721 | // specified by the function's internal formal parameter count. |
| 4722 | Label rest_parameters; |
| 4723 | __ Ldrsw(x0, UntagSmiMemOperand( |
| 4724 | x2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4725 | __ Ldr(x3, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4726 | __ Ldrsw( |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4727 | x3, FieldMemOperand(x3, SharedFunctionInfo::kFormalParameterCountOffset)); |
| 4728 | __ Subs(x0, x0, x3); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4729 | __ B(gt, &rest_parameters); |
| 4730 | |
| 4731 | // Return an empty rest parameter array. |
| 4732 | __ Bind(&no_rest_parameters); |
| 4733 | { |
| 4734 | // ----------- S t a t e ------------- |
| 4735 | // -- cp : context |
| 4736 | // -- lr : return address |
| 4737 | // ----------------------------------- |
| 4738 | |
| 4739 | // Allocate an empty rest parameter array. |
| 4740 | Label allocate, done_allocate; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4741 | __ Allocate(JSArray::kSize, x0, x1, x2, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4742 | __ Bind(&done_allocate); |
| 4743 | |
| 4744 | // Setup the rest parameter array in x0. |
| 4745 | __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1); |
| 4746 | __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset)); |
| 4747 | __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| 4748 | __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset)); |
| 4749 | __ Str(x1, FieldMemOperand(x0, JSArray::kElementsOffset)); |
| 4750 | __ Mov(x1, Smi::FromInt(0)); |
| 4751 | __ Str(x1, FieldMemOperand(x0, JSArray::kLengthOffset)); |
| 4752 | STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| 4753 | __ Ret(); |
| 4754 | |
| 4755 | // Fall back to %AllocateInNewSpace. |
| 4756 | __ Bind(&allocate); |
| 4757 | { |
| 4758 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4759 | __ Push(Smi::FromInt(JSArray::kSize)); |
| 4760 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4761 | } |
| 4762 | __ B(&done_allocate); |
| 4763 | } |
| 4764 | |
| 4765 | __ Bind(&rest_parameters); |
| 4766 | { |
| 4767 | // Compute the pointer to the first rest parameter (skippping the receiver). |
| 4768 | __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| 4769 | __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| 4770 | |
| 4771 | // ----------- S t a t e ------------- |
| 4772 | // -- cp : context |
| 4773 | // -- x0 : number of rest parameters |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4774 | // -- x1 : function |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4775 | // -- x2 : pointer to first rest parameters |
| 4776 | // -- lr : return address |
| 4777 | // ----------------------------------- |
| 4778 | |
| 4779 | // Allocate space for the rest parameter array plus the backing store. |
| 4780 | Label allocate, done_allocate; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4781 | __ Mov(x6, JSArray::kSize + FixedArray::kHeaderSize); |
| 4782 | __ Add(x6, x6, Operand(x0, LSL, kPointerSizeLog2)); |
| 4783 | __ Allocate(x6, x3, x4, x5, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4784 | __ Bind(&done_allocate); |
| 4785 | |
| 4786 | // Compute arguments.length in x6. |
| 4787 | __ SmiTag(x6, x0); |
| 4788 | |
| 4789 | // Setup the elements array in x3. |
| 4790 | __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex); |
| 4791 | __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset)); |
| 4792 | __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset)); |
| 4793 | __ Add(x4, x3, FixedArray::kHeaderSize); |
| 4794 | { |
| 4795 | Label loop, done_loop; |
| 4796 | __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2)); |
| 4797 | __ Bind(&loop); |
| 4798 | __ Cmp(x4, x0); |
| 4799 | __ B(eq, &done_loop); |
| 4800 | __ Ldr(x5, MemOperand(x2, 0 * kPointerSize)); |
| 4801 | __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize)); |
| 4802 | __ Sub(x2, x2, Operand(1 * kPointerSize)); |
| 4803 | __ Add(x4, x4, Operand(1 * kPointerSize)); |
| 4804 | __ B(&loop); |
| 4805 | __ Bind(&done_loop); |
| 4806 | } |
| 4807 | |
| 4808 | // Setup the rest parameter array in x0. |
| 4809 | __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, x1); |
| 4810 | __ Str(x1, FieldMemOperand(x0, JSArray::kMapOffset)); |
| 4811 | __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| 4812 | __ Str(x1, FieldMemOperand(x0, JSArray::kPropertiesOffset)); |
| 4813 | __ Str(x3, FieldMemOperand(x0, JSArray::kElementsOffset)); |
| 4814 | __ Str(x6, FieldMemOperand(x0, JSArray::kLengthOffset)); |
| 4815 | STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| 4816 | __ Ret(); |
| 4817 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4818 | // Fall back to %AllocateInNewSpace (if not too big). |
| 4819 | Label too_big_for_new_space; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4820 | __ Bind(&allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4821 | __ Cmp(x6, Operand(Page::kMaxRegularHeapObjectSize)); |
| 4822 | __ B(gt, &too_big_for_new_space); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4823 | { |
| 4824 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 4825 | __ SmiTag(x0); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4826 | __ SmiTag(x6); |
| 4827 | __ Push(x0, x2, x6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4828 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4829 | __ Mov(x3, x0); |
| 4830 | __ Pop(x2, x0); |
| 4831 | __ SmiUntag(x0); |
| 4832 | } |
| 4833 | __ B(&done_allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4834 | |
| 4835 | // Fall back to %NewRestParameter. |
| 4836 | __ Bind(&too_big_for_new_space); |
| 4837 | __ Push(x1); |
| 4838 | __ TailCallRuntime(Runtime::kNewRestParameter); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4839 | } |
| 4840 | } |
| 4841 | |
| 4842 | |
| 4843 | void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) { |
| 4844 | // ----------- S t a t e ------------- |
| 4845 | // -- x1 : function |
| 4846 | // -- cp : context |
| 4847 | // -- fp : frame pointer |
| 4848 | // -- lr : return address |
| 4849 | // ----------------------------------- |
| 4850 | __ AssertFunction(x1); |
| 4851 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4852 | // Make x6 point to the JavaScript frame. |
| 4853 | __ Mov(x6, fp); |
| 4854 | if (skip_stub_frame()) { |
| 4855 | // For Ignition we need to skip the handler/stub frame to reach the |
| 4856 | // JavaScript frame for the function. |
| 4857 | __ Ldr(x6, MemOperand(x6, StandardFrameConstants::kCallerFPOffset)); |
| 4858 | } |
| 4859 | if (FLAG_debug_code) { |
| 4860 | Label ok; |
| 4861 | __ Ldr(x3, MemOperand(x6, StandardFrameConstants::kFunctionOffset)); |
| 4862 | __ Cmp(x3, x1); |
| 4863 | __ B(eq, &ok); |
| 4864 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 4865 | __ Bind(&ok); |
| 4866 | } |
| 4867 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4868 | // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub. |
| 4869 | __ Ldr(x2, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
| 4870 | __ Ldrsw( |
| 4871 | x2, FieldMemOperand(x2, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4872 | __ Add(x3, x6, Operand(x2, LSL, kPointerSizeLog2)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4873 | __ Add(x3, x3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 4874 | __ SmiTag(x2); |
| 4875 | |
| 4876 | // x1 : function |
| 4877 | // x2 : number of parameters (tagged) |
| 4878 | // x3 : parameters pointer |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4879 | // x6 : JavaScript frame pointer |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4880 | // |
| 4881 | // Returns pointer to result object in x0. |
| 4882 | |
| 4883 | // Make an untagged copy of the parameter count. |
| 4884 | // Note: arg_count_smi is an alias of param_count_smi. |
| 4885 | Register function = x1; |
| 4886 | Register arg_count_smi = x2; |
| 4887 | Register param_count_smi = x2; |
| 4888 | Register recv_arg = x3; |
| 4889 | Register param_count = x7; |
| 4890 | __ SmiUntag(param_count, param_count_smi); |
| 4891 | |
| 4892 | // Check if the calling frame is an arguments adaptor frame. |
| 4893 | Register caller_fp = x11; |
| 4894 | Register caller_ctx = x12; |
| 4895 | Label runtime; |
| 4896 | Label adaptor_frame, try_allocate; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4897 | __ Ldr(caller_fp, MemOperand(x6, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4898 | __ Ldr( |
| 4899 | caller_ctx, |
| 4900 | MemOperand(caller_fp, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4901 | __ Cmp(caller_ctx, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| 4902 | __ B(eq, &adaptor_frame); |
| 4903 | |
| 4904 | // No adaptor, parameter count = argument count. |
| 4905 | |
| 4906 | // x1 function function pointer |
| 4907 | // x2 arg_count_smi number of function arguments (smi) |
| 4908 | // x3 recv_arg pointer to receiver arguments |
| 4909 | // x4 mapped_params number of mapped params, min(params, args) (uninit) |
| 4910 | // x7 param_count number of function parameters |
| 4911 | // x11 caller_fp caller's frame pointer |
| 4912 | // x14 arg_count number of function arguments (uninit) |
| 4913 | |
| 4914 | Register arg_count = x14; |
| 4915 | Register mapped_params = x4; |
| 4916 | __ Mov(arg_count, param_count); |
| 4917 | __ Mov(mapped_params, param_count); |
| 4918 | __ B(&try_allocate); |
| 4919 | |
| 4920 | // We have an adaptor frame. Patch the parameters pointer. |
| 4921 | __ Bind(&adaptor_frame); |
| 4922 | __ Ldr(arg_count_smi, |
| 4923 | MemOperand(caller_fp, |
| 4924 | ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4925 | __ SmiUntag(arg_count, arg_count_smi); |
| 4926 | __ Add(x10, caller_fp, Operand(arg_count, LSL, kPointerSizeLog2)); |
| 4927 | __ Add(recv_arg, x10, StandardFrameConstants::kCallerSPOffset); |
| 4928 | |
| 4929 | // Compute the mapped parameter count = min(param_count, arg_count) |
| 4930 | __ Cmp(param_count, arg_count); |
| 4931 | __ Csel(mapped_params, param_count, arg_count, lt); |
| 4932 | |
| 4933 | __ Bind(&try_allocate); |
| 4934 | |
| 4935 | // x0 alloc_obj pointer to allocated objects: param map, backing |
| 4936 | // store, arguments (uninit) |
| 4937 | // x1 function function pointer |
| 4938 | // x2 arg_count_smi number of function arguments (smi) |
| 4939 | // x3 recv_arg pointer to receiver arguments |
| 4940 | // x4 mapped_params number of mapped parameters, min(params, args) |
| 4941 | // x7 param_count number of function parameters |
| 4942 | // x10 size size of objects to allocate (uninit) |
| 4943 | // x14 arg_count number of function arguments |
| 4944 | |
| 4945 | // Compute the size of backing store, parameter map, and arguments object. |
| 4946 | // 1. Parameter map, has two extra words containing context and backing |
| 4947 | // store. |
| 4948 | const int kParameterMapHeaderSize = |
| 4949 | FixedArray::kHeaderSize + 2 * kPointerSize; |
| 4950 | |
| 4951 | // Calculate the parameter map size, assuming it exists. |
| 4952 | Register size = x10; |
| 4953 | __ Mov(size, Operand(mapped_params, LSL, kPointerSizeLog2)); |
| 4954 | __ Add(size, size, kParameterMapHeaderSize); |
| 4955 | |
| 4956 | // If there are no mapped parameters, set the running size total to zero. |
| 4957 | // Otherwise, use the parameter map size calculated earlier. |
| 4958 | __ Cmp(mapped_params, 0); |
| 4959 | __ CzeroX(size, eq); |
| 4960 | |
| 4961 | // 2. Add the size of the backing store and arguments object. |
| 4962 | __ Add(size, size, Operand(arg_count, LSL, kPointerSizeLog2)); |
| 4963 | __ Add(size, size, FixedArray::kHeaderSize + JSSloppyArgumentsObject::kSize); |
| 4964 | |
| 4965 | // Do the allocation of all three objects in one go. Assign this to x0, as it |
| 4966 | // will be returned to the caller. |
| 4967 | Register alloc_obj = x0; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4968 | __ Allocate(size, alloc_obj, x11, x12, &runtime, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4969 | |
| 4970 | // Get the arguments boilerplate from the current (global) context. |
| 4971 | |
| 4972 | // x0 alloc_obj pointer to allocated objects (param map, backing |
| 4973 | // store, arguments) |
| 4974 | // x1 function function pointer |
| 4975 | // x2 arg_count_smi number of function arguments (smi) |
| 4976 | // x3 recv_arg pointer to receiver arguments |
| 4977 | // x4 mapped_params number of mapped parameters, min(params, args) |
| 4978 | // x7 param_count number of function parameters |
| 4979 | // x11 sloppy_args_map offset to args (or aliased args) map (uninit) |
| 4980 | // x14 arg_count number of function arguments |
| 4981 | |
| 4982 | Register global_ctx = x10; |
| 4983 | Register sloppy_args_map = x11; |
| 4984 | Register aliased_args_map = x10; |
| 4985 | __ Ldr(global_ctx, NativeContextMemOperand()); |
| 4986 | |
| 4987 | __ Ldr(sloppy_args_map, |
| 4988 | ContextMemOperand(global_ctx, Context::SLOPPY_ARGUMENTS_MAP_INDEX)); |
| 4989 | __ Ldr( |
| 4990 | aliased_args_map, |
| 4991 | ContextMemOperand(global_ctx, Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX)); |
| 4992 | __ Cmp(mapped_params, 0); |
| 4993 | __ CmovX(sloppy_args_map, aliased_args_map, ne); |
| 4994 | |
| 4995 | // Copy the JS object part. |
| 4996 | __ Str(sloppy_args_map, FieldMemOperand(alloc_obj, JSObject::kMapOffset)); |
| 4997 | __ LoadRoot(x10, Heap::kEmptyFixedArrayRootIndex); |
| 4998 | __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kPropertiesOffset)); |
| 4999 | __ Str(x10, FieldMemOperand(alloc_obj, JSObject::kElementsOffset)); |
| 5000 | |
| 5001 | // Set up the callee in-object property. |
| 5002 | __ AssertNotSmi(function); |
| 5003 | __ Str(function, |
| 5004 | FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kCalleeOffset)); |
| 5005 | |
| 5006 | // Use the length and set that as an in-object property. |
| 5007 | __ Str(arg_count_smi, |
| 5008 | FieldMemOperand(alloc_obj, JSSloppyArgumentsObject::kLengthOffset)); |
| 5009 | |
| 5010 | // Set up the elements pointer in the allocated arguments object. |
| 5011 | // If we allocated a parameter map, "elements" will point there, otherwise |
| 5012 | // it will point to the backing store. |
| 5013 | |
| 5014 | // x0 alloc_obj pointer to allocated objects (param map, backing |
| 5015 | // store, arguments) |
| 5016 | // x1 function function pointer |
| 5017 | // x2 arg_count_smi number of function arguments (smi) |
| 5018 | // x3 recv_arg pointer to receiver arguments |
| 5019 | // x4 mapped_params number of mapped parameters, min(params, args) |
| 5020 | // x5 elements pointer to parameter map or backing store (uninit) |
| 5021 | // x6 backing_store pointer to backing store (uninit) |
| 5022 | // x7 param_count number of function parameters |
| 5023 | // x14 arg_count number of function arguments |
| 5024 | |
| 5025 | Register elements = x5; |
| 5026 | __ Add(elements, alloc_obj, JSSloppyArgumentsObject::kSize); |
| 5027 | __ Str(elements, FieldMemOperand(alloc_obj, JSObject::kElementsOffset)); |
| 5028 | |
| 5029 | // Initialize parameter map. If there are no mapped arguments, we're done. |
| 5030 | Label skip_parameter_map; |
| 5031 | __ Cmp(mapped_params, 0); |
| 5032 | // Set up backing store address, because it is needed later for filling in |
| 5033 | // the unmapped arguments. |
| 5034 | Register backing_store = x6; |
| 5035 | __ CmovX(backing_store, elements, eq); |
| 5036 | __ B(eq, &skip_parameter_map); |
| 5037 | |
| 5038 | __ LoadRoot(x10, Heap::kSloppyArgumentsElementsMapRootIndex); |
| 5039 | __ Str(x10, FieldMemOperand(elements, FixedArray::kMapOffset)); |
| 5040 | __ Add(x10, mapped_params, 2); |
| 5041 | __ SmiTag(x10); |
| 5042 | __ Str(x10, FieldMemOperand(elements, FixedArray::kLengthOffset)); |
| 5043 | __ Str(cp, FieldMemOperand(elements, |
| 5044 | FixedArray::kHeaderSize + 0 * kPointerSize)); |
| 5045 | __ Add(x10, elements, Operand(mapped_params, LSL, kPointerSizeLog2)); |
| 5046 | __ Add(x10, x10, kParameterMapHeaderSize); |
| 5047 | __ Str(x10, FieldMemOperand(elements, |
| 5048 | FixedArray::kHeaderSize + 1 * kPointerSize)); |
| 5049 | |
| 5050 | // Copy the parameter slots and the holes in the arguments. |
| 5051 | // We need to fill in mapped_parameter_count slots. Then index the context, |
| 5052 | // where parameters are stored in reverse order, at: |
| 5053 | // |
| 5054 | // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS + parameter_count - 1 |
| 5055 | // |
| 5056 | // The mapped parameter thus needs to get indices: |
| 5057 | // |
| 5058 | // MIN_CONTEXT_SLOTS + parameter_count - 1 .. |
| 5059 | // MIN_CONTEXT_SLOTS + parameter_count - mapped_parameter_count |
| 5060 | // |
| 5061 | // We loop from right to left. |
| 5062 | |
| 5063 | // x0 alloc_obj pointer to allocated objects (param map, backing |
| 5064 | // store, arguments) |
| 5065 | // x1 function function pointer |
| 5066 | // x2 arg_count_smi number of function arguments (smi) |
| 5067 | // x3 recv_arg pointer to receiver arguments |
| 5068 | // x4 mapped_params number of mapped parameters, min(params, args) |
| 5069 | // x5 elements pointer to parameter map or backing store (uninit) |
| 5070 | // x6 backing_store pointer to backing store (uninit) |
| 5071 | // x7 param_count number of function parameters |
| 5072 | // x11 loop_count parameter loop counter (uninit) |
| 5073 | // x12 index parameter index (smi, uninit) |
| 5074 | // x13 the_hole hole value (uninit) |
| 5075 | // x14 arg_count number of function arguments |
| 5076 | |
| 5077 | Register loop_count = x11; |
| 5078 | Register index = x12; |
| 5079 | Register the_hole = x13; |
| 5080 | Label parameters_loop, parameters_test; |
| 5081 | __ Mov(loop_count, mapped_params); |
| 5082 | __ Add(index, param_count, static_cast<int>(Context::MIN_CONTEXT_SLOTS)); |
| 5083 | __ Sub(index, index, mapped_params); |
| 5084 | __ SmiTag(index); |
| 5085 | __ LoadRoot(the_hole, Heap::kTheHoleValueRootIndex); |
| 5086 | __ Add(backing_store, elements, Operand(loop_count, LSL, kPointerSizeLog2)); |
| 5087 | __ Add(backing_store, backing_store, kParameterMapHeaderSize); |
| 5088 | |
| 5089 | __ B(¶meters_test); |
| 5090 | |
| 5091 | __ Bind(¶meters_loop); |
| 5092 | __ Sub(loop_count, loop_count, 1); |
| 5093 | __ Mov(x10, Operand(loop_count, LSL, kPointerSizeLog2)); |
| 5094 | __ Add(x10, x10, kParameterMapHeaderSize - kHeapObjectTag); |
| 5095 | __ Str(index, MemOperand(elements, x10)); |
| 5096 | __ Sub(x10, x10, kParameterMapHeaderSize - FixedArray::kHeaderSize); |
| 5097 | __ Str(the_hole, MemOperand(backing_store, x10)); |
| 5098 | __ Add(index, index, Smi::FromInt(1)); |
| 5099 | __ Bind(¶meters_test); |
| 5100 | __ Cbnz(loop_count, ¶meters_loop); |
| 5101 | |
| 5102 | __ Bind(&skip_parameter_map); |
| 5103 | // Copy arguments header and remaining slots (if there are any.) |
| 5104 | __ LoadRoot(x10, Heap::kFixedArrayMapRootIndex); |
| 5105 | __ Str(x10, FieldMemOperand(backing_store, FixedArray::kMapOffset)); |
| 5106 | __ Str(arg_count_smi, FieldMemOperand(backing_store, |
| 5107 | FixedArray::kLengthOffset)); |
| 5108 | |
| 5109 | // x0 alloc_obj pointer to allocated objects (param map, backing |
| 5110 | // store, arguments) |
| 5111 | // x1 function function pointer |
| 5112 | // x2 arg_count_smi number of function arguments (smi) |
| 5113 | // x3 recv_arg pointer to receiver arguments |
| 5114 | // x4 mapped_params number of mapped parameters, min(params, args) |
| 5115 | // x6 backing_store pointer to backing store (uninit) |
| 5116 | // x14 arg_count number of function arguments |
| 5117 | |
| 5118 | Label arguments_loop, arguments_test; |
| 5119 | __ Mov(x10, mapped_params); |
| 5120 | __ Sub(recv_arg, recv_arg, Operand(x10, LSL, kPointerSizeLog2)); |
| 5121 | __ B(&arguments_test); |
| 5122 | |
| 5123 | __ Bind(&arguments_loop); |
| 5124 | __ Sub(recv_arg, recv_arg, kPointerSize); |
| 5125 | __ Ldr(x11, MemOperand(recv_arg)); |
| 5126 | __ Add(x12, backing_store, Operand(x10, LSL, kPointerSizeLog2)); |
| 5127 | __ Str(x11, FieldMemOperand(x12, FixedArray::kHeaderSize)); |
| 5128 | __ Add(x10, x10, 1); |
| 5129 | |
| 5130 | __ Bind(&arguments_test); |
| 5131 | __ Cmp(x10, arg_count); |
| 5132 | __ B(lt, &arguments_loop); |
| 5133 | |
| 5134 | __ Ret(); |
| 5135 | |
| 5136 | // Do the runtime call to allocate the arguments object. |
| 5137 | __ Bind(&runtime); |
| 5138 | __ Push(function, recv_arg, arg_count_smi); |
| 5139 | __ TailCallRuntime(Runtime::kNewSloppyArguments); |
| 5140 | } |
| 5141 | |
| 5142 | |
| 5143 | void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) { |
| 5144 | // ----------- S t a t e ------------- |
| 5145 | // -- x1 : function |
| 5146 | // -- cp : context |
| 5147 | // -- fp : frame pointer |
| 5148 | // -- lr : return address |
| 5149 | // ----------------------------------- |
| 5150 | __ AssertFunction(x1); |
| 5151 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5152 | // Make x2 point to the JavaScript frame. |
| 5153 | __ Mov(x2, fp); |
| 5154 | if (skip_stub_frame()) { |
| 5155 | // For Ignition we need to skip the handler/stub frame to reach the |
| 5156 | // JavaScript frame for the function. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5157 | __ Ldr(x2, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5158 | } |
| 5159 | if (FLAG_debug_code) { |
| 5160 | Label ok; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5161 | __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kFunctionOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5162 | __ Cmp(x3, x1); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5163 | __ B(eq, &ok); |
| 5164 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 5165 | __ Bind(&ok); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5166 | } |
| 5167 | |
| 5168 | // Check if we have an arguments adaptor frame below the function frame. |
| 5169 | Label arguments_adaptor, arguments_done; |
| 5170 | __ Ldr(x3, MemOperand(x2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5171 | __ Ldr(x4, MemOperand(x3, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5172 | __ Cmp(x4, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); |
| 5173 | __ B(eq, &arguments_adaptor); |
| 5174 | { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5175 | __ Ldr(x4, FieldMemOperand(x1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5176 | __ Ldrsw(x0, FieldMemOperand( |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5177 | x4, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5178 | __ Add(x2, x2, Operand(x0, LSL, kPointerSizeLog2)); |
| 5179 | __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| 5180 | } |
| 5181 | __ B(&arguments_done); |
| 5182 | __ Bind(&arguments_adaptor); |
| 5183 | { |
| 5184 | __ Ldrsw(x0, UntagSmiMemOperand( |
| 5185 | x3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 5186 | __ Add(x2, x3, Operand(x0, LSL, kPointerSizeLog2)); |
| 5187 | __ Add(x2, x2, StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize); |
| 5188 | } |
| 5189 | __ Bind(&arguments_done); |
| 5190 | |
| 5191 | // ----------- S t a t e ------------- |
| 5192 | // -- cp : context |
| 5193 | // -- x0 : number of rest parameters |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5194 | // -- x1 : function |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5195 | // -- x2 : pointer to first rest parameters |
| 5196 | // -- lr : return address |
| 5197 | // ----------------------------------- |
| 5198 | |
| 5199 | // Allocate space for the strict arguments object plus the backing store. |
| 5200 | Label allocate, done_allocate; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5201 | __ Mov(x6, JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize); |
| 5202 | __ Add(x6, x6, Operand(x0, LSL, kPointerSizeLog2)); |
| 5203 | __ Allocate(x6, x3, x4, x5, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5204 | __ Bind(&done_allocate); |
| 5205 | |
| 5206 | // Compute arguments.length in x6. |
| 5207 | __ SmiTag(x6, x0); |
| 5208 | |
| 5209 | // Setup the elements array in x3. |
| 5210 | __ LoadRoot(x1, Heap::kFixedArrayMapRootIndex); |
| 5211 | __ Str(x1, FieldMemOperand(x3, FixedArray::kMapOffset)); |
| 5212 | __ Str(x6, FieldMemOperand(x3, FixedArray::kLengthOffset)); |
| 5213 | __ Add(x4, x3, FixedArray::kHeaderSize); |
| 5214 | { |
| 5215 | Label loop, done_loop; |
| 5216 | __ Add(x0, x4, Operand(x0, LSL, kPointerSizeLog2)); |
| 5217 | __ Bind(&loop); |
| 5218 | __ Cmp(x4, x0); |
| 5219 | __ B(eq, &done_loop); |
| 5220 | __ Ldr(x5, MemOperand(x2, 0 * kPointerSize)); |
| 5221 | __ Str(x5, FieldMemOperand(x4, 0 * kPointerSize)); |
| 5222 | __ Sub(x2, x2, Operand(1 * kPointerSize)); |
| 5223 | __ Add(x4, x4, Operand(1 * kPointerSize)); |
| 5224 | __ B(&loop); |
| 5225 | __ Bind(&done_loop); |
| 5226 | } |
| 5227 | |
| 5228 | // Setup the strict arguments object in x0. |
| 5229 | __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, x1); |
| 5230 | __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kMapOffset)); |
| 5231 | __ LoadRoot(x1, Heap::kEmptyFixedArrayRootIndex); |
| 5232 | __ Str(x1, FieldMemOperand(x0, JSStrictArgumentsObject::kPropertiesOffset)); |
| 5233 | __ Str(x3, FieldMemOperand(x0, JSStrictArgumentsObject::kElementsOffset)); |
| 5234 | __ Str(x6, FieldMemOperand(x0, JSStrictArgumentsObject::kLengthOffset)); |
| 5235 | STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize); |
| 5236 | __ Ret(); |
| 5237 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5238 | // Fall back to %AllocateInNewSpace (if not too big). |
| 5239 | Label too_big_for_new_space; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5240 | __ Bind(&allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5241 | __ Cmp(x6, Operand(Page::kMaxRegularHeapObjectSize)); |
| 5242 | __ B(gt, &too_big_for_new_space); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5243 | { |
| 5244 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 5245 | __ SmiTag(x0); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5246 | __ SmiTag(x6); |
| 5247 | __ Push(x0, x2, x6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5248 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 5249 | __ Mov(x3, x0); |
| 5250 | __ Pop(x2, x0); |
| 5251 | __ SmiUntag(x0); |
| 5252 | } |
| 5253 | __ B(&done_allocate); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5254 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 5255 | // Fall back to %NewStrictArguments. |
| 5256 | __ Bind(&too_big_for_new_space); |
| 5257 | __ Push(x1); |
| 5258 | __ TailCallRuntime(Runtime::kNewStrictArguments); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5259 | } |
| 5260 | |
| 5261 | |
| 5262 | void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| 5263 | Register context = cp; |
| 5264 | Register value = x0; |
| 5265 | Register slot = x2; |
| 5266 | Register context_temp = x10; |
| 5267 | Register cell = x10; |
| 5268 | Register cell_details = x11; |
| 5269 | Register cell_value = x12; |
| 5270 | Register cell_value_map = x13; |
| 5271 | Register value_map = x14; |
| 5272 | Label fast_heapobject_case, fast_smi_case, slow_case; |
| 5273 | |
| 5274 | if (FLAG_debug_code) { |
| 5275 | __ CompareRoot(value, Heap::kTheHoleValueRootIndex); |
| 5276 | __ Check(ne, kUnexpectedValue); |
| 5277 | } |
| 5278 | |
| 5279 | // Go up the context chain to the script context. |
| 5280 | for (int i = 0; i < depth(); i++) { |
| 5281 | __ Ldr(context_temp, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| 5282 | context = context_temp; |
| 5283 | } |
| 5284 | |
| 5285 | // Load the PropertyCell at the specified slot. |
| 5286 | __ Add(cell, context, Operand(slot, LSL, kPointerSizeLog2)); |
| 5287 | __ Ldr(cell, ContextMemOperand(cell)); |
| 5288 | |
| 5289 | // Load PropertyDetails for the cell (actually only the cell_type and kind). |
| 5290 | __ Ldr(cell_details, |
| 5291 | UntagSmiFieldMemOperand(cell, PropertyCell::kDetailsOffset)); |
| 5292 | __ And(cell_details, cell_details, |
| 5293 | PropertyDetails::PropertyCellTypeField::kMask | |
| 5294 | PropertyDetails::KindField::kMask | |
| 5295 | PropertyDetails::kAttributesReadOnlyMask); |
| 5296 | |
| 5297 | // Check if PropertyCell holds mutable data. |
| 5298 | Label not_mutable_data; |
| 5299 | __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| 5300 | PropertyCellType::kMutable) | |
| 5301 | PropertyDetails::KindField::encode(kData)); |
| 5302 | __ B(ne, ¬_mutable_data); |
| 5303 | __ JumpIfSmi(value, &fast_smi_case); |
| 5304 | __ Bind(&fast_heapobject_case); |
| 5305 | __ Str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5306 | // RecordWriteField clobbers the value register, so we copy it before the |
| 5307 | // call. |
| 5308 | __ Mov(x11, value); |
| 5309 | __ RecordWriteField(cell, PropertyCell::kValueOffset, x11, x12, |
| 5310 | kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| 5311 | OMIT_SMI_CHECK); |
| 5312 | __ Ret(); |
| 5313 | |
| 5314 | __ Bind(¬_mutable_data); |
| 5315 | // Check if PropertyCell value matches the new value (relevant for Constant, |
| 5316 | // ConstantType and Undefined cells). |
| 5317 | Label not_same_value; |
| 5318 | __ Ldr(cell_value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5319 | __ Cmp(cell_value, value); |
| 5320 | __ B(ne, ¬_same_value); |
| 5321 | |
| 5322 | // Make sure the PropertyCell is not marked READ_ONLY. |
| 5323 | __ Tst(cell_details, PropertyDetails::kAttributesReadOnlyMask); |
| 5324 | __ B(ne, &slow_case); |
| 5325 | |
| 5326 | if (FLAG_debug_code) { |
| 5327 | Label done; |
| 5328 | // This can only be true for Constant, ConstantType and Undefined cells, |
| 5329 | // because we never store the_hole via this stub. |
| 5330 | __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| 5331 | PropertyCellType::kConstant) | |
| 5332 | PropertyDetails::KindField::encode(kData)); |
| 5333 | __ B(eq, &done); |
| 5334 | __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| 5335 | PropertyCellType::kConstantType) | |
| 5336 | PropertyDetails::KindField::encode(kData)); |
| 5337 | __ B(eq, &done); |
| 5338 | __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| 5339 | PropertyCellType::kUndefined) | |
| 5340 | PropertyDetails::KindField::encode(kData)); |
| 5341 | __ Check(eq, kUnexpectedValue); |
| 5342 | __ Bind(&done); |
| 5343 | } |
| 5344 | __ Ret(); |
| 5345 | __ Bind(¬_same_value); |
| 5346 | |
| 5347 | // Check if PropertyCell contains data with constant type (and is not |
| 5348 | // READ_ONLY). |
| 5349 | __ Cmp(cell_details, PropertyDetails::PropertyCellTypeField::encode( |
| 5350 | PropertyCellType::kConstantType) | |
| 5351 | PropertyDetails::KindField::encode(kData)); |
| 5352 | __ B(ne, &slow_case); |
| 5353 | |
| 5354 | // Now either both old and new values must be smis or both must be heap |
| 5355 | // objects with same map. |
| 5356 | Label value_is_heap_object; |
| 5357 | __ JumpIfNotSmi(value, &value_is_heap_object); |
| 5358 | __ JumpIfNotSmi(cell_value, &slow_case); |
| 5359 | // Old and new values are smis, no need for a write barrier here. |
| 5360 | __ Bind(&fast_smi_case); |
| 5361 | __ Str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5362 | __ Ret(); |
| 5363 | |
| 5364 | __ Bind(&value_is_heap_object); |
| 5365 | __ JumpIfSmi(cell_value, &slow_case); |
| 5366 | |
| 5367 | __ Ldr(cell_value_map, FieldMemOperand(cell_value, HeapObject::kMapOffset)); |
| 5368 | __ Ldr(value_map, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 5369 | __ Cmp(cell_value_map, value_map); |
| 5370 | __ B(eq, &fast_heapobject_case); |
| 5371 | |
| 5372 | // Fall back to the runtime. |
| 5373 | __ Bind(&slow_case); |
| 5374 | __ SmiTag(slot); |
| 5375 | __ Push(slot, value); |
| 5376 | __ TailCallRuntime(is_strict(language_mode()) |
| 5377 | ? Runtime::kStoreGlobalViaContext_Strict |
| 5378 | : Runtime::kStoreGlobalViaContext_Sloppy); |
| 5379 | } |
| 5380 | |
| 5381 | |
| 5382 | // The number of register that CallApiFunctionAndReturn will need to save on |
| 5383 | // the stack. The space for these registers need to be allocated in the |
| 5384 | // ExitFrame before calling CallApiFunctionAndReturn. |
| 5385 | static const int kCallApiFunctionSpillSpace = 4; |
| 5386 | |
| 5387 | |
| 5388 | static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| 5389 | return static_cast<int>(ref0.address() - ref1.address()); |
| 5390 | } |
| 5391 | |
| 5392 | |
| 5393 | // Calls an API function. Allocates HandleScope, extracts returned value |
| 5394 | // from handle and propagates exceptions. |
| 5395 | // 'stack_space' is the space to be unwound on exit (includes the call JS |
| 5396 | // arguments space and the additional space allocated for the fast call). |
| 5397 | // 'spill_offset' is the offset from the stack pointer where |
| 5398 | // CallApiFunctionAndReturn can spill registers. |
| 5399 | static void CallApiFunctionAndReturn( |
| 5400 | MacroAssembler* masm, Register function_address, |
| 5401 | ExternalReference thunk_ref, int stack_space, |
| 5402 | MemOperand* stack_space_operand, int spill_offset, |
| 5403 | MemOperand return_value_operand, MemOperand* context_restore_operand) { |
| 5404 | ASM_LOCATION("CallApiFunctionAndReturn"); |
| 5405 | Isolate* isolate = masm->isolate(); |
| 5406 | ExternalReference next_address = |
| 5407 | ExternalReference::handle_scope_next_address(isolate); |
| 5408 | const int kNextOffset = 0; |
| 5409 | const int kLimitOffset = AddressOffset( |
| 5410 | ExternalReference::handle_scope_limit_address(isolate), next_address); |
| 5411 | const int kLevelOffset = AddressOffset( |
| 5412 | ExternalReference::handle_scope_level_address(isolate), next_address); |
| 5413 | |
| 5414 | DCHECK(function_address.is(x1) || function_address.is(x2)); |
| 5415 | |
| 5416 | Label profiler_disabled; |
| 5417 | Label end_profiler_check; |
| 5418 | __ Mov(x10, ExternalReference::is_profiling_address(isolate)); |
| 5419 | __ Ldrb(w10, MemOperand(x10)); |
| 5420 | __ Cbz(w10, &profiler_disabled); |
| 5421 | __ Mov(x3, thunk_ref); |
| 5422 | __ B(&end_profiler_check); |
| 5423 | |
| 5424 | __ Bind(&profiler_disabled); |
| 5425 | __ Mov(x3, function_address); |
| 5426 | __ Bind(&end_profiler_check); |
| 5427 | |
| 5428 | // Save the callee-save registers we are going to use. |
| 5429 | // TODO(all): Is this necessary? ARM doesn't do it. |
| 5430 | STATIC_ASSERT(kCallApiFunctionSpillSpace == 4); |
| 5431 | __ Poke(x19, (spill_offset + 0) * kXRegSize); |
| 5432 | __ Poke(x20, (spill_offset + 1) * kXRegSize); |
| 5433 | __ Poke(x21, (spill_offset + 2) * kXRegSize); |
| 5434 | __ Poke(x22, (spill_offset + 3) * kXRegSize); |
| 5435 | |
| 5436 | // Allocate HandleScope in callee-save registers. |
| 5437 | // We will need to restore the HandleScope after the call to the API function, |
| 5438 | // by allocating it in callee-save registers they will be preserved by C code. |
| 5439 | Register handle_scope_base = x22; |
| 5440 | Register next_address_reg = x19; |
| 5441 | Register limit_reg = x20; |
| 5442 | Register level_reg = w21; |
| 5443 | |
| 5444 | __ Mov(handle_scope_base, next_address); |
| 5445 | __ Ldr(next_address_reg, MemOperand(handle_scope_base, kNextOffset)); |
| 5446 | __ Ldr(limit_reg, MemOperand(handle_scope_base, kLimitOffset)); |
| 5447 | __ Ldr(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| 5448 | __ Add(level_reg, level_reg, 1); |
| 5449 | __ Str(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| 5450 | |
| 5451 | if (FLAG_log_timer_events) { |
| 5452 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5453 | __ PushSafepointRegisters(); |
| 5454 | __ Mov(x0, ExternalReference::isolate_address(isolate)); |
| 5455 | __ CallCFunction(ExternalReference::log_enter_external_function(isolate), |
| 5456 | 1); |
| 5457 | __ PopSafepointRegisters(); |
| 5458 | } |
| 5459 | |
| 5460 | // Native call returns to the DirectCEntry stub which redirects to the |
| 5461 | // return address pushed on stack (could have moved after GC). |
| 5462 | // DirectCEntry stub itself is generated early and never moves. |
| 5463 | DirectCEntryStub stub(isolate); |
| 5464 | stub.GenerateCall(masm, x3); |
| 5465 | |
| 5466 | if (FLAG_log_timer_events) { |
| 5467 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5468 | __ PushSafepointRegisters(); |
| 5469 | __ Mov(x0, ExternalReference::isolate_address(isolate)); |
| 5470 | __ CallCFunction(ExternalReference::log_leave_external_function(isolate), |
| 5471 | 1); |
| 5472 | __ PopSafepointRegisters(); |
| 5473 | } |
| 5474 | |
| 5475 | Label promote_scheduled_exception; |
| 5476 | Label delete_allocated_handles; |
| 5477 | Label leave_exit_frame; |
| 5478 | Label return_value_loaded; |
| 5479 | |
| 5480 | // Load value from ReturnValue. |
| 5481 | __ Ldr(x0, return_value_operand); |
| 5482 | __ Bind(&return_value_loaded); |
| 5483 | // No more valid handles (the result handle was the last one). Restore |
| 5484 | // previous handle scope. |
| 5485 | __ Str(next_address_reg, MemOperand(handle_scope_base, kNextOffset)); |
| 5486 | if (__ emit_debug_code()) { |
| 5487 | __ Ldr(w1, MemOperand(handle_scope_base, kLevelOffset)); |
| 5488 | __ Cmp(w1, level_reg); |
| 5489 | __ Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| 5490 | } |
| 5491 | __ Sub(level_reg, level_reg, 1); |
| 5492 | __ Str(level_reg, MemOperand(handle_scope_base, kLevelOffset)); |
| 5493 | __ Ldr(x1, MemOperand(handle_scope_base, kLimitOffset)); |
| 5494 | __ Cmp(limit_reg, x1); |
| 5495 | __ B(ne, &delete_allocated_handles); |
| 5496 | |
| 5497 | // Leave the API exit frame. |
| 5498 | __ Bind(&leave_exit_frame); |
| 5499 | // Restore callee-saved registers. |
| 5500 | __ Peek(x19, (spill_offset + 0) * kXRegSize); |
| 5501 | __ Peek(x20, (spill_offset + 1) * kXRegSize); |
| 5502 | __ Peek(x21, (spill_offset + 2) * kXRegSize); |
| 5503 | __ Peek(x22, (spill_offset + 3) * kXRegSize); |
| 5504 | |
| 5505 | bool restore_context = context_restore_operand != NULL; |
| 5506 | if (restore_context) { |
| 5507 | __ Ldr(cp, *context_restore_operand); |
| 5508 | } |
| 5509 | |
| 5510 | if (stack_space_operand != NULL) { |
| 5511 | __ Ldr(w2, *stack_space_operand); |
| 5512 | } |
| 5513 | |
| 5514 | __ LeaveExitFrame(false, x1, !restore_context); |
| 5515 | |
| 5516 | // Check if the function scheduled an exception. |
| 5517 | __ Mov(x5, ExternalReference::scheduled_exception_address(isolate)); |
| 5518 | __ Ldr(x5, MemOperand(x5)); |
| 5519 | __ JumpIfNotRoot(x5, Heap::kTheHoleValueRootIndex, |
| 5520 | &promote_scheduled_exception); |
| 5521 | |
| 5522 | if (stack_space_operand != NULL) { |
| 5523 | __ Drop(x2, 1); |
| 5524 | } else { |
| 5525 | __ Drop(stack_space); |
| 5526 | } |
| 5527 | __ Ret(); |
| 5528 | |
| 5529 | // Re-throw by promoting a scheduled exception. |
| 5530 | __ Bind(&promote_scheduled_exception); |
| 5531 | __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| 5532 | |
| 5533 | // HandleScope limit has changed. Delete allocated extensions. |
| 5534 | __ Bind(&delete_allocated_handles); |
| 5535 | __ Str(limit_reg, MemOperand(handle_scope_base, kLimitOffset)); |
| 5536 | // Save the return value in a callee-save register. |
| 5537 | Register saved_result = x19; |
| 5538 | __ Mov(saved_result, x0); |
| 5539 | __ Mov(x0, ExternalReference::isolate_address(isolate)); |
| 5540 | __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate), |
| 5541 | 1); |
| 5542 | __ Mov(x0, saved_result); |
| 5543 | __ B(&leave_exit_frame); |
| 5544 | } |
| 5545 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5546 | void CallApiCallbackStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5547 | // ----------- S t a t e ------------- |
| 5548 | // -- x0 : callee |
| 5549 | // -- x4 : call_data |
| 5550 | // -- x2 : holder |
| 5551 | // -- x1 : api_function_address |
| 5552 | // -- cp : context |
| 5553 | // -- |
| 5554 | // -- sp[0] : last argument |
| 5555 | // -- ... |
| 5556 | // -- sp[(argc - 1) * 8] : first argument |
| 5557 | // -- sp[argc * 8] : receiver |
| 5558 | // ----------------------------------- |
| 5559 | |
| 5560 | Register callee = x0; |
| 5561 | Register call_data = x4; |
| 5562 | Register holder = x2; |
| 5563 | Register api_function_address = x1; |
| 5564 | Register context = cp; |
| 5565 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5566 | typedef FunctionCallbackArguments FCA; |
| 5567 | |
| 5568 | STATIC_ASSERT(FCA::kContextSaveIndex == 6); |
| 5569 | STATIC_ASSERT(FCA::kCalleeIndex == 5); |
| 5570 | STATIC_ASSERT(FCA::kDataIndex == 4); |
| 5571 | STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| 5572 | STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| 5573 | STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| 5574 | STATIC_ASSERT(FCA::kHolderIndex == 0); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5575 | STATIC_ASSERT(FCA::kNewTargetIndex == 7); |
| 5576 | STATIC_ASSERT(FCA::kArgsLength == 8); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5577 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5578 | // FunctionCallbackArguments |
| 5579 | |
| 5580 | // new target |
| 5581 | __ PushRoot(Heap::kUndefinedValueRootIndex); |
| 5582 | |
| 5583 | // context, callee and call data. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5584 | __ Push(context, callee, call_data); |
| 5585 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5586 | if (!is_lazy()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5587 | // Load context from callee |
| 5588 | __ Ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset)); |
| 5589 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5590 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5591 | if (!call_data_undefined()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5592 | __ LoadRoot(call_data, Heap::kUndefinedValueRootIndex); |
| 5593 | } |
| 5594 | Register isolate_reg = x5; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5595 | __ Mov(isolate_reg, ExternalReference::isolate_address(masm->isolate())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5596 | |
| 5597 | // FunctionCallbackArguments: |
| 5598 | // return value, return value default, isolate, holder. |
| 5599 | __ Push(call_data, call_data, isolate_reg, holder); |
| 5600 | |
| 5601 | // Prepare arguments. |
| 5602 | Register args = x6; |
| 5603 | __ Mov(args, masm->StackPointer()); |
| 5604 | |
| 5605 | // Allocate the v8::Arguments structure in the arguments' space, since it's |
| 5606 | // not controlled by GC. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5607 | const int kApiStackSpace = 3; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5608 | |
| 5609 | // Allocate space for CallApiFunctionAndReturn can store some scratch |
| 5610 | // registeres on the stack. |
| 5611 | const int kCallApiFunctionSpillSpace = 4; |
| 5612 | |
| 5613 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5614 | __ EnterExitFrame(false, x10, kApiStackSpace + kCallApiFunctionSpillSpace); |
| 5615 | |
| 5616 | DCHECK(!AreAliased(x0, api_function_address)); |
| 5617 | // x0 = FunctionCallbackInfo& |
| 5618 | // Arguments is after the return address. |
| 5619 | __ Add(x0, masm->StackPointer(), 1 * kPointerSize); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5620 | // FunctionCallbackInfo::implicit_args_ and FunctionCallbackInfo::values_ |
| 5621 | __ Add(x10, args, Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize)); |
| 5622 | __ Stp(args, x10, MemOperand(x0, 0 * kPointerSize)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5623 | // FunctionCallbackInfo::length_ = argc |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5624 | __ Mov(x10, argc()); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5625 | __ Str(x10, MemOperand(x0, 2 * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5626 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5627 | ExternalReference thunk_ref = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5628 | ExternalReference::invoke_function_callback(masm->isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5629 | |
| 5630 | AllowExternalCallThatCantCauseGC scope(masm); |
| 5631 | MemOperand context_restore_operand( |
| 5632 | fp, (2 + FCA::kContextSaveIndex) * kPointerSize); |
| 5633 | // Stores return the first js argument |
| 5634 | int return_value_offset = 0; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5635 | if (is_store()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5636 | return_value_offset = 2 + FCA::kArgsLength; |
| 5637 | } else { |
| 5638 | return_value_offset = 2 + FCA::kReturnValueOffset; |
| 5639 | } |
| 5640 | MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5641 | int stack_space = 0; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5642 | MemOperand length_operand = |
| 5643 | MemOperand(masm->StackPointer(), 3 * kPointerSize); |
| 5644 | MemOperand* stack_space_operand = &length_operand; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5645 | stack_space = argc() + FCA::kArgsLength + 1; |
| 5646 | stack_space_operand = NULL; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5647 | |
| 5648 | const int spill_offset = 1 + kApiStackSpace; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5649 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| 5650 | stack_space_operand, spill_offset, |
| 5651 | return_value_operand, &context_restore_operand); |
| 5652 | } |
| 5653 | |
| 5654 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5655 | void CallApiGetterStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5656 | // Build v8::PropertyCallbackInfo::args_ array on the stack and push property |
| 5657 | // name below the exit frame to make GC aware of them. |
| 5658 | STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0); |
| 5659 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1); |
| 5660 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2); |
| 5661 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3); |
| 5662 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4); |
| 5663 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5); |
| 5664 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6); |
| 5665 | STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5666 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5667 | Register receiver = ApiGetterDescriptor::ReceiverRegister(); |
| 5668 | Register holder = ApiGetterDescriptor::HolderRegister(); |
| 5669 | Register callback = ApiGetterDescriptor::CallbackRegister(); |
| 5670 | Register scratch = x4; |
| 5671 | Register scratch2 = x5; |
| 5672 | Register scratch3 = x6; |
| 5673 | DCHECK(!AreAliased(receiver, holder, callback, scratch)); |
| 5674 | |
| 5675 | __ Push(receiver); |
| 5676 | |
| 5677 | __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| 5678 | __ Mov(scratch2, Operand(ExternalReference::isolate_address(isolate()))); |
| 5679 | __ Ldr(scratch3, FieldMemOperand(callback, AccessorInfo::kDataOffset)); |
| 5680 | __ Push(scratch3, scratch, scratch, scratch2, holder); |
| 5681 | __ Push(Smi::FromInt(0)); // should_throw_on_error -> false |
| 5682 | __ Ldr(scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset)); |
| 5683 | __ Push(scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5684 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5685 | // v8::PropertyCallbackInfo::args_ array and name handle. |
| 5686 | const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| 5687 | |
| 5688 | // Load address of v8::PropertyAccessorInfo::args_ array and name handle. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5689 | __ Mov(x0, masm->StackPointer()); // x0 = Handle<Name> |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5690 | __ Add(x1, x0, 1 * kPointerSize); // x1 = v8::PCI::args_ |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5691 | |
| 5692 | const int kApiStackSpace = 1; |
| 5693 | |
| 5694 | // Allocate space for CallApiFunctionAndReturn can store some scratch |
| 5695 | // registeres on the stack. |
| 5696 | const int kCallApiFunctionSpillSpace = 4; |
| 5697 | |
| 5698 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5699 | __ EnterExitFrame(false, x10, kApiStackSpace + kCallApiFunctionSpillSpace); |
| 5700 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5701 | // Create v8::PropertyCallbackInfo object on the stack and initialize |
| 5702 | // it's args_ field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5703 | __ Poke(x1, 1 * kPointerSize); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5704 | __ Add(x1, masm->StackPointer(), 1 * kPointerSize); |
| 5705 | // x1 = v8::PropertyCallbackInfo& |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5706 | |
| 5707 | ExternalReference thunk_ref = |
| 5708 | ExternalReference::invoke_accessor_getter_callback(isolate()); |
| 5709 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5710 | Register api_function_address = x2; |
| 5711 | __ Ldr(scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset)); |
| 5712 | __ Ldr(api_function_address, |
| 5713 | FieldMemOperand(scratch, Foreign::kForeignAddressOffset)); |
| 5714 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5715 | const int spill_offset = 1 + kApiStackSpace; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5716 | // +3 is to skip prolog, return address and name handle. |
| 5717 | MemOperand return_value_operand( |
| 5718 | fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5719 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
| 5720 | kStackUnwindSpace, NULL, spill_offset, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5721 | return_value_operand, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5722 | } |
| 5723 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5724 | #undef __ |
| 5725 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5726 | } // namespace internal |
| 5727 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5728 | |
| 5729 | #endif // V8_TARGET_ARCH_ARM64 |