Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 4 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_ARM |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 6 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 7 | #include "src/base/bits.h" |
| 8 | #include "src/bootstrapper.h" |
| 9 | #include "src/code-stubs.h" |
| 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" |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 18 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 19 | #include "src/arm/code-stubs-arm.h" |
| 20 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 21 | namespace v8 { |
| 22 | namespace internal { |
| 23 | |
| 24 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 25 | static void InitializeArrayConstructorDescriptor( |
| 26 | Isolate* isolate, CodeStubDescriptor* descriptor, |
| 27 | int constant_stack_parameter_count) { |
| 28 | Address deopt_handler = Runtime::FunctionForId( |
| 29 | Runtime::kArrayConstructor)->entry; |
| 30 | |
| 31 | if (constant_stack_parameter_count == 0) { |
| 32 | descriptor->Initialize(deopt_handler, constant_stack_parameter_count, |
| 33 | JS_FUNCTION_STUB_MODE); |
| 34 | } else { |
| 35 | descriptor->Initialize(r0, deopt_handler, constant_stack_parameter_count, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 36 | JS_FUNCTION_STUB_MODE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 37 | } |
| 38 | } |
| 39 | |
| 40 | |
| 41 | static void InitializeInternalArrayConstructorDescriptor( |
| 42 | Isolate* isolate, CodeStubDescriptor* descriptor, |
| 43 | int constant_stack_parameter_count) { |
| 44 | Address deopt_handler = Runtime::FunctionForId( |
| 45 | Runtime::kInternalArrayConstructor)->entry; |
| 46 | |
| 47 | if (constant_stack_parameter_count == 0) { |
| 48 | descriptor->Initialize(deopt_handler, constant_stack_parameter_count, |
| 49 | JS_FUNCTION_STUB_MODE); |
| 50 | } else { |
| 51 | descriptor->Initialize(r0, deopt_handler, constant_stack_parameter_count, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 52 | JS_FUNCTION_STUB_MODE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 53 | } |
| 54 | } |
| 55 | |
| 56 | |
| 57 | void ArrayNoArgumentConstructorStub::InitializeDescriptor( |
| 58 | CodeStubDescriptor* descriptor) { |
| 59 | InitializeArrayConstructorDescriptor(isolate(), descriptor, 0); |
| 60 | } |
| 61 | |
| 62 | |
| 63 | void ArraySingleArgumentConstructorStub::InitializeDescriptor( |
| 64 | CodeStubDescriptor* descriptor) { |
| 65 | InitializeArrayConstructorDescriptor(isolate(), descriptor, 1); |
| 66 | } |
| 67 | |
| 68 | |
| 69 | void ArrayNArgumentsConstructorStub::InitializeDescriptor( |
| 70 | CodeStubDescriptor* descriptor) { |
| 71 | InitializeArrayConstructorDescriptor(isolate(), descriptor, -1); |
| 72 | } |
| 73 | |
| 74 | |
| 75 | void InternalArrayNoArgumentConstructorStub::InitializeDescriptor( |
| 76 | CodeStubDescriptor* descriptor) { |
| 77 | InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, 0); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | void InternalArraySingleArgumentConstructorStub::InitializeDescriptor( |
| 82 | CodeStubDescriptor* descriptor) { |
| 83 | InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, 1); |
| 84 | } |
| 85 | |
| 86 | |
| 87 | void InternalArrayNArgumentsConstructorStub::InitializeDescriptor( |
| 88 | CodeStubDescriptor* descriptor) { |
| 89 | InitializeInternalArrayConstructorDescriptor(isolate(), descriptor, -1); |
| 90 | } |
| 91 | |
| 92 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 93 | #define __ ACCESS_MASM(masm) |
| 94 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 95 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 96 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
| 97 | Condition cond, Strength strength); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 98 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 99 | Register lhs, |
| 100 | Register rhs, |
| 101 | Label* lhs_not_nan, |
| 102 | Label* slow, |
| 103 | bool strict); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 104 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 105 | Register lhs, |
| 106 | Register rhs); |
| 107 | |
| 108 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 109 | void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm, |
| 110 | ExternalReference miss) { |
| 111 | // Update the static counter each time a new code stub is generated. |
| 112 | isolate()->counters()->code_stubs()->Increment(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 113 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 114 | CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 115 | int param_count = descriptor.GetRegisterParameterCount(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 116 | { |
| 117 | // Call the runtime system in a fresh internal frame. |
| 118 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 119 | DCHECK(param_count == 0 || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 120 | r0.is(descriptor.GetRegisterParameter(param_count - 1))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | // Push arguments |
| 122 | for (int i = 0; i < param_count; ++i) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 123 | __ push(descriptor.GetRegisterParameter(i)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 124 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 125 | __ CallExternalReference(miss, param_count); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 126 | } |
| 127 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 128 | __ Ret(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 129 | } |
| 130 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 131 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 132 | void DoubleToIStub::Generate(MacroAssembler* masm) { |
| 133 | Label out_of_range, only_low, negate, done; |
| 134 | Register input_reg = source(); |
| 135 | Register result_reg = destination(); |
| 136 | DCHECK(is_truncating()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 137 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 138 | int double_offset = offset(); |
| 139 | // Account for saved regs if input is sp. |
| 140 | if (input_reg.is(sp)) double_offset += 3 * kPointerSize; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 141 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 142 | Register scratch = GetRegisterThatIsNotOneOf(input_reg, result_reg); |
| 143 | Register scratch_low = |
| 144 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch); |
| 145 | Register scratch_high = |
| 146 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch, scratch_low); |
| 147 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 148 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 149 | __ Push(scratch_high, scratch_low, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 150 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 151 | if (!skip_fastpath()) { |
| 152 | // Load double input. |
| 153 | __ vldr(double_scratch, MemOperand(input_reg, double_offset)); |
| 154 | __ vmov(scratch_low, scratch_high, double_scratch); |
| 155 | |
| 156 | // Do fast-path convert from double to int. |
| 157 | __ vcvt_s32_f64(double_scratch.low(), double_scratch); |
| 158 | __ vmov(result_reg, double_scratch.low()); |
| 159 | |
| 160 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 161 | __ sub(scratch, result_reg, Operand(1)); |
| 162 | __ cmp(scratch, Operand(0x7ffffffe)); |
| 163 | __ b(lt, &done); |
| 164 | } else { |
| 165 | // We've already done MacroAssembler::TryFastTruncatedDoubleToILoad, so we |
| 166 | // know exponent > 31, so we can skip the vcvt_s32_f64 which will saturate. |
| 167 | if (double_offset == 0) { |
| 168 | __ ldm(ia, input_reg, scratch_low.bit() | scratch_high.bit()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 169 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 170 | __ ldr(scratch_low, MemOperand(input_reg, double_offset)); |
| 171 | __ ldr(scratch_high, MemOperand(input_reg, double_offset + kIntSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 172 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 173 | } |
| 174 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 175 | __ Ubfx(scratch, scratch_high, |
| 176 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 177 | // Load scratch with exponent - 1. This is faster than loading |
| 178 | // with exponent because Bias + 1 = 1024 which is an *ARM* immediate value. |
| 179 | STATIC_ASSERT(HeapNumber::kExponentBias + 1 == 1024); |
| 180 | __ sub(scratch, scratch, Operand(HeapNumber::kExponentBias + 1)); |
| 181 | // If exponent is greater than or equal to 84, the 32 less significant |
| 182 | // bits are 0s (2^84 = 1, 52 significant bits, 32 uncoded bits), |
| 183 | // the result is 0. |
| 184 | // Compare exponent with 84 (compare exponent - 1 with 83). |
| 185 | __ cmp(scratch, Operand(83)); |
| 186 | __ b(ge, &out_of_range); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 187 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 188 | // If we reach this code, 31 <= exponent <= 83. |
| 189 | // So, we don't have to handle cases where 0 <= exponent <= 20 for |
| 190 | // which we would need to shift right the high part of the mantissa. |
| 191 | // Scratch contains exponent - 1. |
| 192 | // Load scratch with 52 - exponent (load with 51 - (exponent - 1)). |
| 193 | __ rsb(scratch, scratch, Operand(51), SetCC); |
| 194 | __ b(ls, &only_low); |
| 195 | // 21 <= exponent <= 51, shift scratch_low and scratch_high |
| 196 | // to generate the result. |
| 197 | __ mov(scratch_low, Operand(scratch_low, LSR, scratch)); |
| 198 | // Scratch contains: 52 - exponent. |
| 199 | // We needs: exponent - 20. |
| 200 | // So we use: 32 - scratch = 32 - 52 + exponent = exponent - 20. |
| 201 | __ rsb(scratch, scratch, Operand(32)); |
| 202 | __ Ubfx(result_reg, scratch_high, |
| 203 | 0, HeapNumber::kMantissaBitsInTopWord); |
| 204 | // Set the implicit 1 before the mantissa part in scratch_high. |
| 205 | __ orr(result_reg, result_reg, |
| 206 | Operand(1 << HeapNumber::kMantissaBitsInTopWord)); |
| 207 | __ orr(result_reg, scratch_low, Operand(result_reg, LSL, scratch)); |
| 208 | __ b(&negate); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 209 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 210 | __ bind(&out_of_range); |
| 211 | __ mov(result_reg, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 212 | __ b(&done); |
| 213 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 214 | __ bind(&only_low); |
| 215 | // 52 <= exponent <= 83, shift only scratch_low. |
| 216 | // On entry, scratch contains: 52 - exponent. |
| 217 | __ rsb(scratch, scratch, Operand::Zero()); |
| 218 | __ mov(result_reg, Operand(scratch_low, LSL, scratch)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 219 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 220 | __ bind(&negate); |
| 221 | // If input was positive, scratch_high ASR 31 equals 0 and |
| 222 | // scratch_high LSR 31 equals zero. |
| 223 | // New result = (result eor 0) + 0 = result. |
| 224 | // If the input was negative, we have to negate the result. |
| 225 | // Input_high ASR 31 equals 0xffffffff and scratch_high LSR 31 equals 1. |
| 226 | // New result = (result eor 0xffffffff) + 1 = 0 - result. |
| 227 | __ eor(result_reg, result_reg, Operand(scratch_high, ASR, 31)); |
| 228 | __ add(result_reg, result_reg, Operand(scratch_high, LSR, 31)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 229 | |
| 230 | __ bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 231 | |
| 232 | __ Pop(scratch_high, scratch_low, scratch); |
| 233 | __ Ret(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 237 | // Handle the case where the lhs and rhs are the same object. |
| 238 | // Equality is almost reflexive (everything but NaN), so this is a test |
| 239 | // for "identity and not NaN". |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 240 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
| 241 | Condition cond, Strength strength) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 242 | Label not_identical; |
| 243 | Label heap_number, return_equal; |
| 244 | __ cmp(r0, r1); |
| 245 | __ b(ne, ¬_identical); |
| 246 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 247 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| 248 | // so we do the second best thing - test it ourselves. |
| 249 | // They are both equal and they are not both Smis so both of them are not |
| 250 | // Smis. If it's not a heap number, then return equal. |
| 251 | if (cond == lt || cond == gt) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 252 | // Call runtime on identical JSObjects. |
| 253 | __ CompareObjectType(r0, r4, r4, FIRST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 254 | __ b(ge, slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 255 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 256 | __ cmp(r4, Operand(SYMBOL_TYPE)); |
| 257 | __ b(eq, slow); |
| 258 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 259 | __ cmp(r4, Operand(SIMD128_VALUE_TYPE)); |
| 260 | __ b(eq, slow); |
| 261 | if (is_strong(strength)) { |
| 262 | // Call the runtime on anything that is converted in the semantics, since |
| 263 | // we need to throw a TypeError. Smis have already been ruled out. |
| 264 | __ cmp(r4, Operand(HEAP_NUMBER_TYPE)); |
| 265 | __ b(eq, &return_equal); |
| 266 | __ tst(r4, Operand(kIsNotStringMask)); |
| 267 | __ b(ne, slow); |
| 268 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 269 | } else { |
| 270 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 271 | __ b(eq, &heap_number); |
| 272 | // Comparing JS objects with <=, >= is complicated. |
| 273 | if (cond != eq) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 274 | __ cmp(r4, Operand(FIRST_JS_RECEIVER_TYPE)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 275 | __ b(ge, slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 276 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 277 | __ cmp(r4, Operand(SYMBOL_TYPE)); |
| 278 | __ b(eq, slow); |
| 279 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 280 | __ cmp(r4, Operand(SIMD128_VALUE_TYPE)); |
| 281 | __ b(eq, slow); |
| 282 | if (is_strong(strength)) { |
| 283 | // Call the runtime on anything that is converted in the semantics, |
| 284 | // since we need to throw a TypeError. Smis and heap numbers have |
| 285 | // already been ruled out. |
| 286 | __ tst(r4, Operand(kIsNotStringMask)); |
| 287 | __ b(ne, slow); |
| 288 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 289 | // Normally here we fall through to return_equal, but undefined is |
| 290 | // special: (undefined == undefined) == true, but |
| 291 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 292 | if (cond == le || cond == ge) { |
| 293 | __ cmp(r4, Operand(ODDBALL_TYPE)); |
| 294 | __ b(ne, &return_equal); |
| 295 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 296 | __ cmp(r0, r2); |
| 297 | __ b(ne, &return_equal); |
| 298 | if (cond == le) { |
| 299 | // undefined <= undefined should fail. |
| 300 | __ mov(r0, Operand(GREATER)); |
| 301 | } else { |
| 302 | // undefined >= undefined should fail. |
| 303 | __ mov(r0, Operand(LESS)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 304 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 305 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 306 | } |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | __ bind(&return_equal); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 311 | if (cond == lt) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 312 | __ mov(r0, Operand(GREATER)); // Things aren't less than themselves. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 313 | } else if (cond == gt) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 314 | __ mov(r0, Operand(LESS)); // Things aren't greater than themselves. |
| 315 | } else { |
| 316 | __ mov(r0, Operand(EQUAL)); // Things are <=, >=, ==, === themselves. |
| 317 | } |
| 318 | __ Ret(); |
| 319 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 320 | // For less and greater we don't have to check for NaN since the result of |
| 321 | // x < x is false regardless. For the others here is some code to check |
| 322 | // for NaN. |
| 323 | if (cond != lt && cond != gt) { |
| 324 | __ bind(&heap_number); |
| 325 | // It is a heap number, so return non-equal if it's NaN and equal if it's |
| 326 | // not NaN. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 327 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 328 | // The representation of NaN values has all exponent bits (52..62) set, |
| 329 | // and not all mantissa bits (0..51) clear. |
| 330 | // Read top bits of double representation (second word of value). |
| 331 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 332 | // Test that exponent bits are all set. |
| 333 | __ Sbfx(r3, r2, HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 334 | // NaNs have all-one exponents so they sign extend to -1. |
| 335 | __ cmp(r3, Operand(-1)); |
| 336 | __ b(ne, &return_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 337 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 338 | // Shift out flag and all exponent bits, retaining only mantissa. |
| 339 | __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord)); |
| 340 | // Or with all low-bits of mantissa. |
| 341 | __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| 342 | __ orr(r0, r3, Operand(r2), SetCC); |
| 343 | // For equal we already have the right value in r0: Return zero (equal) |
| 344 | // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| 345 | // not (it's a NaN). For <= and >= we need to load r0 with the failing |
| 346 | // value if it's a NaN. |
| 347 | if (cond != eq) { |
| 348 | // All-zero means Infinity means equal. |
| 349 | __ Ret(eq); |
| 350 | if (cond == le) { |
| 351 | __ mov(r0, Operand(GREATER)); // NaN <= NaN should fail. |
| 352 | } else { |
| 353 | __ mov(r0, Operand(LESS)); // NaN >= NaN should fail. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 354 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 355 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 356 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 357 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 358 | // No fall through here. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 359 | |
| 360 | __ bind(¬_identical); |
| 361 | } |
| 362 | |
| 363 | |
| 364 | // See comment at call site. |
| 365 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 366 | Register lhs, |
| 367 | Register rhs, |
| 368 | Label* lhs_not_nan, |
| 369 | Label* slow, |
| 370 | bool strict) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 371 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 372 | (lhs.is(r1) && rhs.is(r0))); |
| 373 | |
| 374 | Label rhs_is_smi; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 375 | __ JumpIfSmi(rhs, &rhs_is_smi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 376 | |
| 377 | // Lhs is a Smi. Check whether the rhs is a heap number. |
| 378 | __ CompareObjectType(rhs, r4, r4, HEAP_NUMBER_TYPE); |
| 379 | if (strict) { |
| 380 | // If rhs is not a number and lhs is a Smi then strict equality cannot |
| 381 | // succeed. Return non-equal |
| 382 | // If rhs is r0 then there is already a non zero value in it. |
| 383 | if (!rhs.is(r0)) { |
| 384 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 385 | } |
| 386 | __ Ret(ne); |
| 387 | } else { |
| 388 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 389 | // the runtime. |
| 390 | __ b(ne, slow); |
| 391 | } |
| 392 | |
| 393 | // Lhs is a smi, rhs is a number. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 394 | // Convert lhs to a double in d7. |
| 395 | __ SmiToDouble(d7, lhs); |
| 396 | // Load the double from rhs, tagged HeapNumber r0, to d6. |
| 397 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 398 | |
| 399 | // We now have both loaded as doubles but we can skip the lhs nan check |
| 400 | // since it's a smi. |
| 401 | __ jmp(lhs_not_nan); |
| 402 | |
| 403 | __ bind(&rhs_is_smi); |
| 404 | // Rhs is a smi. Check whether the non-smi lhs is a heap number. |
| 405 | __ CompareObjectType(lhs, r4, r4, HEAP_NUMBER_TYPE); |
| 406 | if (strict) { |
| 407 | // If lhs is not a number and rhs is a smi then strict equality cannot |
| 408 | // succeed. Return non-equal. |
| 409 | // If lhs is r0 then there is already a non zero value in it. |
| 410 | if (!lhs.is(r0)) { |
| 411 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 412 | } |
| 413 | __ Ret(ne); |
| 414 | } else { |
| 415 | // Smi compared non-strictly with a non-smi non-heap-number. Call |
| 416 | // the runtime. |
| 417 | __ b(ne, slow); |
| 418 | } |
| 419 | |
| 420 | // Rhs is a smi, lhs is a heap number. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 421 | // Load the double from lhs, tagged HeapNumber r1, to d7. |
| 422 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
| 423 | // Convert rhs to a double in d6 . |
| 424 | __ SmiToDouble(d6, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 425 | // Fall through to both_loaded_as_doubles. |
| 426 | } |
| 427 | |
| 428 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 429 | // See comment at call site. |
| 430 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 431 | Register lhs, |
| 432 | Register rhs) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 433 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 434 | (lhs.is(r1) && rhs.is(r0))); |
| 435 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 436 | // If either operand is a JS object or an oddball value, then they are |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 437 | // not equal since their pointers are different. |
| 438 | // There is no test for undetectability in strict equality. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 439 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 440 | Label first_non_object; |
| 441 | // Get the type of the first operand into r2 and compare it with |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 442 | // FIRST_JS_RECEIVER_TYPE. |
| 443 | __ CompareObjectType(rhs, r2, r2, FIRST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 444 | __ b(lt, &first_non_object); |
| 445 | |
| 446 | // Return non-zero (r0 is not zero) |
| 447 | Label return_not_equal; |
| 448 | __ bind(&return_not_equal); |
| 449 | __ Ret(); |
| 450 | |
| 451 | __ bind(&first_non_object); |
| 452 | // Check for oddballs: true, false, null, undefined. |
| 453 | __ cmp(r2, Operand(ODDBALL_TYPE)); |
| 454 | __ b(eq, &return_not_equal); |
| 455 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 456 | __ CompareObjectType(lhs, r3, r3, FIRST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 457 | __ b(ge, &return_not_equal); |
| 458 | |
| 459 | // Check for oddballs: true, false, null, undefined. |
| 460 | __ cmp(r3, Operand(ODDBALL_TYPE)); |
| 461 | __ b(eq, &return_not_equal); |
| 462 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 463 | // Now that we have the types we might as well check for |
| 464 | // internalized-internalized. |
| 465 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 466 | __ orr(r2, r2, Operand(r3)); |
| 467 | __ tst(r2, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 468 | __ b(eq, &return_not_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 469 | } |
| 470 | |
| 471 | |
| 472 | // See comment at call site. |
| 473 | static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, |
| 474 | Register lhs, |
| 475 | Register rhs, |
| 476 | Label* both_loaded_as_doubles, |
| 477 | Label* not_heap_numbers, |
| 478 | Label* slow) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 479 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 480 | (lhs.is(r1) && rhs.is(r0))); |
| 481 | |
| 482 | __ CompareObjectType(rhs, r3, r2, HEAP_NUMBER_TYPE); |
| 483 | __ b(ne, not_heap_numbers); |
| 484 | __ ldr(r2, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 485 | __ cmp(r2, r3); |
| 486 | __ b(ne, slow); // First was a heap number, second wasn't. Go slow case. |
| 487 | |
| 488 | // Both are heap numbers. Load them up then jump to the code we have |
| 489 | // for that. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 490 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
| 491 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 492 | __ jmp(both_loaded_as_doubles); |
| 493 | } |
| 494 | |
| 495 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 496 | // Fast negative check for internalized-to-internalized equality. |
| 497 | static void EmitCheckForInternalizedStringsOrObjects(MacroAssembler* masm, |
| 498 | Register lhs, |
| 499 | Register rhs, |
| 500 | Label* possible_strings, |
| 501 | Label* not_both_strings) { |
| 502 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 503 | (lhs.is(r1) && rhs.is(r0))); |
| 504 | |
| 505 | // r2 is object type of rhs. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 506 | Label object_test; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 507 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 508 | __ tst(r2, Operand(kIsNotStringMask)); |
| 509 | __ b(ne, &object_test); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 510 | __ tst(r2, Operand(kIsNotInternalizedMask)); |
| 511 | __ b(ne, possible_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 512 | __ CompareObjectType(lhs, r3, r3, FIRST_NONSTRING_TYPE); |
| 513 | __ b(ge, not_both_strings); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 514 | __ tst(r3, Operand(kIsNotInternalizedMask)); |
| 515 | __ b(ne, possible_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 516 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 517 | // Both are internalized. We already checked they weren't the same pointer |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 518 | // so they are not equal. |
| 519 | __ mov(r0, Operand(NOT_EQUAL)); |
| 520 | __ Ret(); |
| 521 | |
| 522 | __ bind(&object_test); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 523 | __ cmp(r2, Operand(FIRST_JS_RECEIVER_TYPE)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 524 | __ b(lt, not_both_strings); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 525 | __ CompareObjectType(lhs, r2, r3, FIRST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 526 | __ b(lt, not_both_strings); |
| 527 | // If both objects are undetectable, they are equal. Otherwise, they |
| 528 | // are not equal, since they are different objects and an object is not |
| 529 | // equal to undefined. |
| 530 | __ ldr(r3, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
| 531 | __ ldrb(r2, FieldMemOperand(r2, Map::kBitFieldOffset)); |
| 532 | __ ldrb(r3, FieldMemOperand(r3, Map::kBitFieldOffset)); |
| 533 | __ and_(r0, r2, Operand(r3)); |
| 534 | __ and_(r0, r0, Operand(1 << Map::kIsUndetectable)); |
| 535 | __ eor(r0, r0, Operand(1 << Map::kIsUndetectable)); |
| 536 | __ Ret(); |
| 537 | } |
| 538 | |
| 539 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 540 | static void CompareICStub_CheckInputType(MacroAssembler* masm, Register input, |
| 541 | Register scratch, |
| 542 | CompareICState::State expected, |
| 543 | Label* fail) { |
| 544 | Label ok; |
| 545 | if (expected == CompareICState::SMI) { |
| 546 | __ JumpIfNotSmi(input, fail); |
| 547 | } else if (expected == CompareICState::NUMBER) { |
| 548 | __ JumpIfSmi(input, &ok); |
| 549 | __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail, |
| 550 | DONT_DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 551 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 552 | // We could be strict about internalized/non-internalized here, but as long as |
| 553 | // hydrogen doesn't care, the stub doesn't have to care either. |
| 554 | __ bind(&ok); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 558 | // On entry r1 and r2 are the values to be compared. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 559 | // On exit r0 is 0, positive or negative to indicate the result of |
| 560 | // the comparison. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 561 | void CompareICStub::GenerateGeneric(MacroAssembler* masm) { |
| 562 | Register lhs = r1; |
| 563 | Register rhs = r0; |
| 564 | Condition cc = GetCondition(); |
| 565 | |
| 566 | Label miss; |
| 567 | CompareICStub_CheckInputType(masm, lhs, r2, left(), &miss); |
| 568 | CompareICStub_CheckInputType(masm, rhs, r3, right(), &miss); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 569 | |
| 570 | Label slow; // Call builtin. |
| 571 | Label not_smis, both_loaded_as_doubles, lhs_not_nan; |
| 572 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 573 | Label not_two_smis, smi_done; |
| 574 | __ orr(r2, r1, r0); |
| 575 | __ JumpIfNotSmi(r2, ¬_two_smis); |
| 576 | __ mov(r1, Operand(r1, ASR, 1)); |
| 577 | __ sub(r0, r1, Operand(r0, ASR, 1)); |
| 578 | __ Ret(); |
| 579 | __ bind(¬_two_smis); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 580 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 581 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 582 | // it is certain that at least one operand isn't a smi. |
| 583 | |
| 584 | // Handle the case where the objects are identical. Either returns the answer |
| 585 | // or goes to slow. Only falls through if the objects were not identical. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 586 | EmitIdenticalObjectComparison(masm, &slow, cc, strength()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 587 | |
| 588 | // If either is a Smi (we know that not both are), then they can only |
| 589 | // be strictly equal if the other is a HeapNumber. |
| 590 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 591 | DCHECK_EQ(static_cast<Smi*>(0), Smi::FromInt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 592 | __ and_(r2, lhs, Operand(rhs)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 593 | __ JumpIfNotSmi(r2, ¬_smis); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 594 | // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| 595 | // 1) Return the answer. |
| 596 | // 2) Go to slow. |
| 597 | // 3) Fall through to both_loaded_as_doubles. |
| 598 | // 4) Jump to lhs_not_nan. |
| 599 | // In cases 3 and 4 we have found out we were dealing with a number-number |
| 600 | // comparison. If VFP3 is supported the double values of the numbers have |
| 601 | // been loaded into d7 and d6. Otherwise, the double values have been loaded |
| 602 | // into r0, r1, r2, and r3. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 603 | EmitSmiNonsmiComparison(masm, lhs, rhs, &lhs_not_nan, &slow, strict()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 604 | |
| 605 | __ bind(&both_loaded_as_doubles); |
| 606 | // The arguments have been converted to doubles and stored in d6 and d7, if |
| 607 | // VFP3 is supported, or in r0, r1, r2, and r3. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 608 | __ bind(&lhs_not_nan); |
| 609 | Label no_nan; |
| 610 | // ARMv7 VFP3 instructions to implement double precision comparison. |
| 611 | __ VFPCompareAndSetFlags(d7, d6); |
| 612 | Label nan; |
| 613 | __ b(vs, &nan); |
| 614 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 615 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 616 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 617 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 618 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 619 | __ bind(&nan); |
| 620 | // If one of the sides was a NaN then the v flag is set. Load r0 with |
| 621 | // whatever it takes to make the comparison fail, since comparisons with NaN |
| 622 | // always fail. |
| 623 | if (cc == lt || cc == le) { |
| 624 | __ mov(r0, Operand(GREATER)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 625 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 626 | __ mov(r0, Operand(LESS)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 627 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 628 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 629 | |
| 630 | __ bind(¬_smis); |
| 631 | // At this point we know we are dealing with two different objects, |
| 632 | // and neither of them is a Smi. The objects are in rhs_ and lhs_. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 633 | if (strict()) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 634 | // This returns non-equal for some object types, or falls through if it |
| 635 | // was not lucky. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 636 | EmitStrictTwoHeapObjectCompare(masm, lhs, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 637 | } |
| 638 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 639 | Label check_for_internalized_strings; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 640 | Label flat_string_check; |
| 641 | // Check for heap-number-heap-number comparison. Can jump to slow case, |
| 642 | // or load both doubles into r0, r1, r2, r3 and jump to the code that handles |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 643 | // that case. If the inputs are not doubles then jumps to |
| 644 | // check_for_internalized_strings. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 645 | // In this case r2 will contain the type of rhs_. Never falls through. |
| 646 | EmitCheckForTwoHeapNumbers(masm, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 647 | lhs, |
| 648 | rhs, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 649 | &both_loaded_as_doubles, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 650 | &check_for_internalized_strings, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 651 | &flat_string_check); |
| 652 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 653 | __ bind(&check_for_internalized_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 654 | // In the strict case the EmitStrictTwoHeapObjectCompare already took care of |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 655 | // internalized strings. |
| 656 | if (cc == eq && !strict()) { |
| 657 | // Returns an answer for two internalized strings or two detectable objects. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 658 | // Otherwise jumps to string case or not both strings case. |
| 659 | // Assumes that r2 is the type of rhs_ on entry. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 660 | EmitCheckForInternalizedStringsOrObjects( |
| 661 | masm, lhs, rhs, &flat_string_check, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 662 | } |
| 663 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 664 | // Check for both being sequential one-byte strings, |
| 665 | // and inline if that is the case. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 666 | __ bind(&flat_string_check); |
| 667 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 668 | __ JumpIfNonSmisNotBothSequentialOneByteStrings(lhs, rhs, r2, r3, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 669 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 670 | __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, r2, |
| 671 | r3); |
| 672 | if (cc == eq) { |
| 673 | StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, r2, r3, r4); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 674 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 675 | StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, r2, r3, r4, |
| 676 | r5); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 677 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 678 | // Never falls through to here. |
| 679 | |
| 680 | __ bind(&slow); |
| 681 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 682 | __ Push(lhs, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 683 | // Figure out which native to call and setup the arguments. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 684 | if (cc == eq) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 685 | __ TailCallRuntime(strict() ? Runtime::kStrictEquals : Runtime::kEquals); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 686 | } else { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 687 | int ncr; // NaN compare result |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 688 | if (cc == lt || cc == le) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 689 | ncr = GREATER; |
| 690 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 691 | DCHECK(cc == gt || cc == ge); // remaining cases |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 692 | ncr = LESS; |
| 693 | } |
| 694 | __ mov(r0, Operand(Smi::FromInt(ncr))); |
| 695 | __ push(r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 696 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 697 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 698 | // tagged as a small integer. |
| 699 | __ TailCallRuntime(is_strong(strength()) ? Runtime::kCompare_Strong |
| 700 | : Runtime::kCompare); |
| 701 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 702 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 703 | __ bind(&miss); |
| 704 | GenerateMiss(masm); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 708 | void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| 709 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 710 | // store the registers in any particular way, but we do have to store and |
| 711 | // restore them. |
| 712 | __ stm(db_w, sp, kCallerSaved | lr.bit()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 713 | |
| 714 | const Register scratch = r1; |
| 715 | |
| 716 | if (save_doubles()) { |
| 717 | __ SaveFPRegs(sp, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 718 | } |
| 719 | const int argument_count = 1; |
| 720 | const int fp_argument_count = 0; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 721 | |
| 722 | AllowExternalCallThatCantCauseGC scope(masm); |
| 723 | __ PrepareCallCFunction(argument_count, fp_argument_count, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 724 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 725 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 726 | ExternalReference::store_buffer_overflow_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 727 | argument_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 728 | if (save_doubles()) { |
| 729 | __ RestoreFPRegs(sp, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 730 | } |
| 731 | __ ldm(ia_w, sp, kCallerSaved | pc.bit()); // Also pop pc to get Ret(0). |
| 732 | } |
| 733 | |
| 734 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 735 | void MathPowStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 736 | const Register base = r1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 737 | const Register exponent = MathPowTaggedDescriptor::exponent(); |
| 738 | DCHECK(exponent.is(r2)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 739 | const Register heapnumbermap = r5; |
| 740 | const Register heapnumber = r0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 741 | const DwVfpRegister double_base = d0; |
| 742 | const DwVfpRegister double_exponent = d1; |
| 743 | const DwVfpRegister double_result = d2; |
| 744 | const DwVfpRegister double_scratch = d3; |
| 745 | const SwVfpRegister single_scratch = s6; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 746 | const Register scratch = r9; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 747 | const Register scratch2 = r4; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 748 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 749 | Label call_runtime, done, int_exponent; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 750 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 751 | Label base_is_smi, unpack_exponent; |
| 752 | // The exponent and base are supplied as arguments on the stack. |
| 753 | // This can only happen if the stub is called from non-optimized code. |
| 754 | // Load input parameters from stack to double registers. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 755 | __ ldr(base, MemOperand(sp, 1 * kPointerSize)); |
| 756 | __ ldr(exponent, MemOperand(sp, 0 * kPointerSize)); |
| 757 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 758 | __ LoadRoot(heapnumbermap, Heap::kHeapNumberMapRootIndex); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 759 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 760 | __ UntagAndJumpIfSmi(scratch, base, &base_is_smi); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 761 | __ ldr(scratch, FieldMemOperand(base, JSObject::kMapOffset)); |
| 762 | __ cmp(scratch, heapnumbermap); |
| 763 | __ b(ne, &call_runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 764 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 765 | __ vldr(double_base, FieldMemOperand(base, HeapNumber::kValueOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 766 | __ jmp(&unpack_exponent); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 767 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 768 | __ bind(&base_is_smi); |
| 769 | __ vmov(single_scratch, scratch); |
| 770 | __ vcvt_f64_s32(double_base, single_scratch); |
| 771 | __ bind(&unpack_exponent); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 772 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 773 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 774 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 775 | __ ldr(scratch, FieldMemOperand(exponent, JSObject::kMapOffset)); |
| 776 | __ cmp(scratch, heapnumbermap); |
| 777 | __ b(ne, &call_runtime); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 778 | __ vldr(double_exponent, |
| 779 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 780 | } else if (exponent_type() == TAGGED) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 781 | // Base is already in double_base. |
| 782 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 783 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 784 | __ vldr(double_exponent, |
| 785 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 786 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 787 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 788 | if (exponent_type() != INTEGER) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 789 | Label int_exponent_convert; |
| 790 | // Detect integer exponents stored as double. |
| 791 | __ vcvt_u32_f64(single_scratch, double_exponent); |
| 792 | // We do not check for NaN or Infinity here because comparing numbers on |
| 793 | // ARM correctly distinguishes NaNs. We end up calling the built-in. |
| 794 | __ vcvt_f64_u32(double_scratch, single_scratch); |
| 795 | __ VFPCompareAndSetFlags(double_scratch, double_exponent); |
| 796 | __ b(eq, &int_exponent_convert); |
| 797 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 798 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 799 | // Detect square root case. Crankshaft detects constant +/-0.5 at |
| 800 | // compile time and uses DoMathPowHalf instead. We then skip this check |
| 801 | // for non-constant cases of +/-0.5 as these hardly occur. |
| 802 | Label not_plus_half; |
| 803 | |
| 804 | // Test for 0.5. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 805 | __ vmov(double_scratch, 0.5, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 806 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 807 | __ b(ne, ¬_plus_half); |
| 808 | |
| 809 | // Calculates square root of base. Check for the special case of |
| 810 | // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 811 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 812 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 813 | __ vneg(double_result, double_scratch, eq); |
| 814 | __ b(eq, &done); |
| 815 | |
| 816 | // Add +0 to convert -0 to +0. |
| 817 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
| 818 | __ vsqrt(double_result, double_scratch); |
| 819 | __ jmp(&done); |
| 820 | |
| 821 | __ bind(¬_plus_half); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 822 | __ vmov(double_scratch, -0.5, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 823 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 824 | __ b(ne, &call_runtime); |
| 825 | |
| 826 | // Calculates square root of base. Check for the special case of |
| 827 | // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 828 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 829 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 830 | __ vmov(double_result, kDoubleRegZero, eq); |
| 831 | __ b(eq, &done); |
| 832 | |
| 833 | // Add +0 to convert -0 to +0. |
| 834 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 835 | __ vmov(double_result, 1.0, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 836 | __ vsqrt(double_scratch, double_scratch); |
| 837 | __ vdiv(double_result, double_result, double_scratch); |
| 838 | __ jmp(&done); |
| 839 | } |
| 840 | |
| 841 | __ push(lr); |
| 842 | { |
| 843 | AllowExternalCallThatCantCauseGC scope(masm); |
| 844 | __ PrepareCallCFunction(0, 2, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 845 | __ MovToFloatParameters(double_base, double_exponent); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 846 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 847 | ExternalReference::power_double_double_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 848 | 0, 2); |
| 849 | } |
| 850 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 851 | __ MovFromFloatResult(double_result); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 852 | __ jmp(&done); |
| 853 | |
| 854 | __ bind(&int_exponent_convert); |
| 855 | __ vcvt_u32_f64(single_scratch, double_exponent); |
| 856 | __ vmov(scratch, single_scratch); |
| 857 | } |
| 858 | |
| 859 | // Calculate power with integer exponent. |
| 860 | __ bind(&int_exponent); |
| 861 | |
| 862 | // Get two copies of exponent in the registers scratch and exponent. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 863 | if (exponent_type() == INTEGER) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 864 | __ mov(scratch, exponent); |
| 865 | } else { |
| 866 | // Exponent has previously been stored into scratch as untagged integer. |
| 867 | __ mov(exponent, scratch); |
| 868 | } |
| 869 | __ vmov(double_scratch, double_base); // Back up base. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 870 | __ vmov(double_result, 1.0, scratch2); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 871 | |
| 872 | // Get absolute value of exponent. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 873 | __ cmp(scratch, Operand::Zero()); |
| 874 | __ mov(scratch2, Operand::Zero(), LeaveCC, mi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 875 | __ sub(scratch, scratch2, scratch, LeaveCC, mi); |
| 876 | |
| 877 | Label while_true; |
| 878 | __ bind(&while_true); |
| 879 | __ mov(scratch, Operand(scratch, ASR, 1), SetCC); |
| 880 | __ vmul(double_result, double_result, double_scratch, cs); |
| 881 | __ vmul(double_scratch, double_scratch, double_scratch, ne); |
| 882 | __ b(ne, &while_true); |
| 883 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 884 | __ cmp(exponent, Operand::Zero()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 885 | __ b(ge, &done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 886 | __ vmov(double_scratch, 1.0, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 887 | __ vdiv(double_result, double_scratch, double_result); |
| 888 | // Test whether result is zero. Bail out to check for subnormal result. |
| 889 | // Due to subnormals, x^-y == (1/x)^y does not hold in all cases. |
| 890 | __ VFPCompareAndSetFlags(double_result, 0.0); |
| 891 | __ b(ne, &done); |
| 892 | // double_exponent may not containe the exponent value if the input was a |
| 893 | // smi. We set it with exponent value before bailing out. |
| 894 | __ vmov(single_scratch, exponent); |
| 895 | __ vcvt_f64_s32(double_exponent, single_scratch); |
| 896 | |
| 897 | // Returning or bailing out. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 898 | Counters* counters = isolate()->counters(); |
| 899 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 900 | // The arguments are still on the stack. |
| 901 | __ bind(&call_runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 902 | __ TailCallRuntime(Runtime::kMathPowRT); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 903 | |
| 904 | // The stub is called from non-optimized code, which expects the result |
| 905 | // as heap number in exponent. |
| 906 | __ bind(&done); |
| 907 | __ AllocateHeapNumber( |
| 908 | heapnumber, scratch, scratch2, heapnumbermap, &call_runtime); |
| 909 | __ vstr(double_result, |
| 910 | FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 911 | DCHECK(heapnumber.is(r0)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 912 | __ IncrementCounter(counters->math_pow(), 1, scratch, scratch2); |
| 913 | __ Ret(2); |
| 914 | } else { |
| 915 | __ push(lr); |
| 916 | { |
| 917 | AllowExternalCallThatCantCauseGC scope(masm); |
| 918 | __ PrepareCallCFunction(0, 2, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 919 | __ MovToFloatParameters(double_base, double_exponent); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 920 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 921 | ExternalReference::power_double_double_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 922 | 0, 2); |
| 923 | } |
| 924 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 925 | __ MovFromFloatResult(double_result); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 926 | |
| 927 | __ bind(&done); |
| 928 | __ IncrementCounter(counters->math_pow(), 1, scratch, scratch2); |
| 929 | __ Ret(); |
| 930 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 931 | } |
| 932 | |
| 933 | |
| 934 | bool CEntryStub::NeedsImmovableCode() { |
| 935 | return true; |
| 936 | } |
| 937 | |
| 938 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 939 | void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 940 | CEntryStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 941 | StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| 942 | StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
| 943 | ArrayConstructorStubBase::GenerateStubsAheadOfTime(isolate); |
| 944 | CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 945 | CreateWeakCellStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 946 | BinaryOpICStub::GenerateAheadOfTime(isolate); |
| 947 | BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 948 | StoreFastElementStub::GenerateAheadOfTime(isolate); |
| 949 | TypeofStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 950 | } |
| 951 | |
| 952 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 953 | void CodeStub::GenerateFPStubs(Isolate* isolate) { |
| 954 | // Generate if not already in cache. |
| 955 | SaveFPRegsMode mode = kSaveFPRegs; |
| 956 | CEntryStub(isolate, 1, mode).GetCode(); |
| 957 | StoreBufferOverflowStub(isolate, mode).GetCode(); |
| 958 | isolate->set_fp_stubs_generated(true); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 962 | void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
| 963 | CEntryStub stub(isolate, 1, kDontSaveFPRegs); |
| 964 | stub.GetCode(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 968 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 969 | // Called from JavaScript; parameters are on stack as if calling JS function. |
| 970 | // r0: number of arguments including receiver |
| 971 | // r1: pointer to builtin function |
| 972 | // fp: frame pointer (restored after C call) |
| 973 | // sp: stack pointer (restored as callee's sp after C call) |
| 974 | // cp: current context (C callee-saved) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 975 | // |
| 976 | // If argv_in_register(): |
| 977 | // r2: pointer to the first argument |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 978 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 979 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 980 | __ mov(r5, Operand(r1)); |
| 981 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 982 | if (argv_in_register()) { |
| 983 | // Move argv into the correct register. |
| 984 | __ mov(r1, Operand(r2)); |
| 985 | } else { |
| 986 | // Compute the argv pointer in a callee-saved register. |
| 987 | __ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 988 | __ sub(r1, r1, Operand(kPointerSize)); |
| 989 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 990 | |
| 991 | // Enter the exit frame that transitions from JavaScript to C++. |
| 992 | FrameScope scope(masm, StackFrame::MANUAL); |
| 993 | __ EnterExitFrame(save_doubles()); |
| 994 | |
| 995 | // Store a copy of argc in callee-saved registers for later. |
| 996 | __ mov(r4, Operand(r0)); |
| 997 | |
| 998 | // r0, r4: number of arguments including receiver (C callee-saved) |
| 999 | // r1: pointer to the first argument (C callee-saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1000 | // r5: pointer to builtin function (C callee-saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1001 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1002 | // Result returned in r0 or r0+r1 by default. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1003 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1004 | #if V8_HOST_ARCH_ARM |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1005 | int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 1006 | int frame_alignment_mask = frame_alignment - 1; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1007 | if (FLAG_debug_code) { |
| 1008 | if (frame_alignment > kPointerSize) { |
| 1009 | Label alignment_as_expected; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1010 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1011 | __ tst(sp, Operand(frame_alignment_mask)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1012 | __ b(eq, &alignment_as_expected); |
| 1013 | // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| 1014 | __ stop("Unexpected alignment"); |
| 1015 | __ bind(&alignment_as_expected); |
| 1016 | } |
| 1017 | } |
| 1018 | #endif |
| 1019 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1020 | // Call C built-in. |
| 1021 | // r0 = argc, r1 = argv |
| 1022 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1023 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1024 | // To let the GC traverse the return address of the exit frames, we need to |
| 1025 | // know where the return address is. The CEntryStub is unmovable, so |
| 1026 | // we can store the address on the stack to be able to find it again and |
| 1027 | // we never have to restore it, because it will not change. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1028 | // Compute the return address in lr to return to after the jump below. Pc is |
| 1029 | // already at '+ 8' from the current instruction but return is after three |
| 1030 | // instructions so add another 4 to pc to get the return address. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1031 | { |
| 1032 | // Prevent literal pool emission before return address. |
| 1033 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1034 | __ add(lr, pc, Operand(4)); |
| 1035 | __ str(lr, MemOperand(sp, 0)); |
| 1036 | __ Call(r5); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1037 | } |
| 1038 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1039 | __ VFPEnsureFPSCRState(r2); |
| 1040 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1041 | // Check result for exception sentinel. |
| 1042 | Label exception_returned; |
| 1043 | __ CompareRoot(r0, Heap::kExceptionRootIndex); |
| 1044 | __ b(eq, &exception_returned); |
| 1045 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1046 | // Check that there is no pending exception, otherwise we |
| 1047 | // should have returned the exception sentinel. |
| 1048 | if (FLAG_debug_code) { |
| 1049 | Label okay; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1050 | ExternalReference pending_exception_address( |
| 1051 | Isolate::kPendingExceptionAddress, isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1052 | __ mov(r2, Operand(pending_exception_address)); |
| 1053 | __ ldr(r2, MemOperand(r2)); |
| 1054 | __ CompareRoot(r2, Heap::kTheHoleValueRootIndex); |
| 1055 | // Cannot use check here as it attempts to generate call into runtime. |
| 1056 | __ b(eq, &okay); |
| 1057 | __ stop("Unexpected pending exception"); |
| 1058 | __ bind(&okay); |
| 1059 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1060 | |
| 1061 | // Exit C frame and return. |
| 1062 | // r0:r1: result |
| 1063 | // sp: stack pointer |
| 1064 | // fp: frame pointer |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1065 | Register argc; |
| 1066 | if (argv_in_register()) { |
| 1067 | // We don't want to pop arguments so set argc to no_reg. |
| 1068 | argc = no_reg; |
| 1069 | } else { |
| 1070 | // Callee-saved register r4 still holds argc. |
| 1071 | argc = r4; |
| 1072 | } |
| 1073 | __ LeaveExitFrame(save_doubles(), argc, true); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1074 | __ mov(pc, lr); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1075 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1076 | // Handling of exception. |
| 1077 | __ bind(&exception_returned); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1078 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1079 | ExternalReference pending_handler_context_address( |
| 1080 | Isolate::kPendingHandlerContextAddress, isolate()); |
| 1081 | ExternalReference pending_handler_code_address( |
| 1082 | Isolate::kPendingHandlerCodeAddress, isolate()); |
| 1083 | ExternalReference pending_handler_offset_address( |
| 1084 | Isolate::kPendingHandlerOffsetAddress, isolate()); |
| 1085 | ExternalReference pending_handler_fp_address( |
| 1086 | Isolate::kPendingHandlerFPAddress, isolate()); |
| 1087 | ExternalReference pending_handler_sp_address( |
| 1088 | Isolate::kPendingHandlerSPAddress, isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1089 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1090 | // Ask the runtime for help to determine the handler. This will set r0 to |
| 1091 | // contain the current pending exception, don't clobber it. |
| 1092 | ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler, |
| 1093 | isolate()); |
| 1094 | { |
| 1095 | FrameScope scope(masm, StackFrame::MANUAL); |
| 1096 | __ PrepareCallCFunction(3, 0, r0); |
| 1097 | __ mov(r0, Operand(0)); |
| 1098 | __ mov(r1, Operand(0)); |
| 1099 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 1100 | __ CallCFunction(find_handler, 3); |
| 1101 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1102 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1103 | // Retrieve the handler context, SP and FP. |
| 1104 | __ mov(cp, Operand(pending_handler_context_address)); |
| 1105 | __ ldr(cp, MemOperand(cp)); |
| 1106 | __ mov(sp, Operand(pending_handler_sp_address)); |
| 1107 | __ ldr(sp, MemOperand(sp)); |
| 1108 | __ mov(fp, Operand(pending_handler_fp_address)); |
| 1109 | __ ldr(fp, MemOperand(fp)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1110 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1111 | // If the handler is a JS frame, restore the context to the frame. Note that |
| 1112 | // the context will be set to (cp == 0) for non-JS frames. |
| 1113 | __ cmp(cp, Operand(0)); |
| 1114 | __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1115 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1116 | // Compute the handler entry address and jump to it. |
| 1117 | ConstantPoolUnavailableScope constant_pool_unavailable(masm); |
| 1118 | __ mov(r1, Operand(pending_handler_code_address)); |
| 1119 | __ ldr(r1, MemOperand(r1)); |
| 1120 | __ mov(r2, Operand(pending_handler_offset_address)); |
| 1121 | __ ldr(r2, MemOperand(r2)); |
| 1122 | __ add(r1, r1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start |
| 1123 | if (FLAG_enable_embedded_constant_pool) { |
| 1124 | __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r1); |
| 1125 | } |
| 1126 | __ add(pc, r1, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1130 | void JSEntryStub::Generate(MacroAssembler* masm) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1131 | // r0: code entry |
| 1132 | // r1: function |
| 1133 | // r2: receiver |
| 1134 | // r3: argc |
| 1135 | // [sp+0]: argv |
| 1136 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1137 | Label invoke, handler_entry, exit; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1138 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1139 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1140 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1141 | // Called from C, so do not pop argc and args on exit (preserve sp) |
| 1142 | // No need to save register-passed args |
| 1143 | // Save callee-saved registers (incl. cp and fp), sp, and lr |
| 1144 | __ stm(db_w, sp, kCalleeSaved | lr.bit()); |
| 1145 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1146 | // Save callee-saved vfp registers. |
| 1147 | __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
| 1148 | // Set up the reserved register for 0.0. |
| 1149 | __ vmov(kDoubleRegZero, 0.0); |
| 1150 | __ VFPEnsureFPSCRState(r4); |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1151 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1152 | // Get address of argv, see stm above. |
| 1153 | // r0: code entry |
| 1154 | // r1: function |
| 1155 | // r2: receiver |
| 1156 | // r3: argc |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1157 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1158 | // Set up argv in r4. |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1159 | int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1160 | offset_to_argv += kNumDoubleCalleeSaved * kDoubleSize; |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1161 | __ ldr(r4, MemOperand(sp, offset_to_argv)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1162 | |
| 1163 | // Push a frame with special values setup to mark it as an entry frame. |
| 1164 | // r0: code entry |
| 1165 | // r1: function |
| 1166 | // r2: receiver |
| 1167 | // r3: argc |
| 1168 | // r4: argv |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1169 | int marker = type(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1170 | if (FLAG_enable_embedded_constant_pool) { |
| 1171 | __ mov(r8, Operand::Zero()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1172 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1173 | __ mov(r7, Operand(Smi::FromInt(marker))); |
| 1174 | __ mov(r6, Operand(Smi::FromInt(marker))); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1175 | __ mov(r5, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1176 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1177 | __ ldr(r5, MemOperand(r5)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1178 | __ mov(ip, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
| 1179 | __ stm(db_w, sp, r5.bit() | r6.bit() | r7.bit() | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1180 | (FLAG_enable_embedded_constant_pool ? r8.bit() : 0) | |
| 1181 | ip.bit()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1182 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1183 | // Set up frame pointer for the frame to be pushed. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1184 | __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 1185 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1186 | // If this is the outermost JS call, set js_entry_sp value. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1187 | Label non_outermost_js; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1188 | ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1189 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 1190 | __ ldr(r6, MemOperand(r5)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1191 | __ cmp(r6, Operand::Zero()); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1192 | __ b(ne, &non_outermost_js); |
| 1193 | __ str(fp, MemOperand(r5)); |
| 1194 | __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 1195 | Label cont; |
| 1196 | __ b(&cont); |
| 1197 | __ bind(&non_outermost_js); |
| 1198 | __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
| 1199 | __ bind(&cont); |
| 1200 | __ push(ip); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1201 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1202 | // Jump to a faked try block that does the invoke, with a faked catch |
| 1203 | // block that sets the pending exception. |
| 1204 | __ jmp(&invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1205 | |
| 1206 | // Block literal pool emission whilst taking the position of the handler |
| 1207 | // entry. This avoids making the assumption that literal pools are always |
| 1208 | // emitted after an instruction is emitted, rather than before. |
| 1209 | { |
| 1210 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1211 | __ bind(&handler_entry); |
| 1212 | handler_offset_ = handler_entry.pos(); |
| 1213 | // Caught exception: Store result (exception) in the pending exception |
| 1214 | // field in the JSEnv and return a failure sentinel. Coming in here the |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1215 | // fp will be invalid because the PushStackHandler below sets it to 0 to |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1216 | // signal the existence of the JSEntry frame. |
| 1217 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1218 | isolate()))); |
| 1219 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1220 | __ str(r0, MemOperand(ip)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1221 | __ LoadRoot(r0, Heap::kExceptionRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1222 | __ b(&exit); |
| 1223 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1224 | // Invoke: Link this frame into the handler chain. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1225 | __ bind(&invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1226 | // Must preserve r0-r4, r5-r6 are available. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1227 | __ PushStackHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1228 | // If an exception not caught by another handler occurs, this handler |
| 1229 | // returns control to the code after the bl(&invoke) above, which |
| 1230 | // restores all kCalleeSaved registers (including cp and fp) to their |
| 1231 | // saved values before returning a failure to C. |
| 1232 | |
| 1233 | // Clear any pending exceptions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1234 | __ mov(r5, Operand(isolate()->factory()->the_hole_value())); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1235 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1236 | isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1237 | __ str(r5, MemOperand(ip)); |
| 1238 | |
| 1239 | // Invoke the function by calling through JS entry trampoline builtin. |
| 1240 | // Notice that we cannot store a reference to the trampoline code directly in |
| 1241 | // this stub, because runtime stubs are not traversed when doing GC. |
| 1242 | |
| 1243 | // Expected registers by Builtins::JSEntryTrampoline |
| 1244 | // r0: code entry |
| 1245 | // r1: function |
| 1246 | // r2: receiver |
| 1247 | // r3: argc |
| 1248 | // r4: argv |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1249 | if (type() == StackFrame::ENTRY_CONSTRUCT) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1250 | ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1251 | isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1252 | __ mov(ip, Operand(construct_entry)); |
| 1253 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1254 | ExternalReference entry(Builtins::kJSEntryTrampoline, isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1255 | __ mov(ip, Operand(entry)); |
| 1256 | } |
| 1257 | __ ldr(ip, MemOperand(ip)); // deref address |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1258 | __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1259 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1260 | // Branch and link to JSEntryTrampoline. |
| 1261 | __ Call(ip); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1262 | |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1263 | // Unlink this frame from the handler chain. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1264 | __ PopStackHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1265 | |
| 1266 | __ bind(&exit); // r0 holds result |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1267 | // Check if the current stack frame is marked as the outermost JS frame. |
| 1268 | Label non_outermost_js_2; |
| 1269 | __ pop(r5); |
| 1270 | __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 1271 | __ b(ne, &non_outermost_js_2); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1272 | __ mov(r6, Operand::Zero()); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1273 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 1274 | __ str(r6, MemOperand(r5)); |
| 1275 | __ bind(&non_outermost_js_2); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1276 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1277 | // Restore the top frame descriptors from the stack. |
| 1278 | __ pop(r3); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1279 | __ mov(ip, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1280 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1281 | __ str(r3, MemOperand(ip)); |
| 1282 | |
| 1283 | // Reset the stack to the callee saved registers. |
| 1284 | __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 1285 | |
| 1286 | // Restore callee-saved registers and return. |
| 1287 | #ifdef DEBUG |
| 1288 | if (FLAG_debug_code) { |
| 1289 | __ mov(lr, Operand(pc)); |
| 1290 | } |
| 1291 | #endif |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1292 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1293 | // Restore callee-saved vfp registers. |
| 1294 | __ vldm(ia_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1295 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1296 | __ ldm(ia_w, sp, kCalleeSaved | pc.bit()); |
| 1297 | } |
| 1298 | |
| 1299 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1300 | void InstanceOfStub::Generate(MacroAssembler* masm) { |
| 1301 | Register const object = r1; // Object (lhs). |
| 1302 | Register const function = r0; // Function (rhs). |
| 1303 | Register const object_map = r2; // Map of {object}. |
| 1304 | Register const function_map = r3; // Map of {function}. |
| 1305 | Register const function_prototype = r4; // Prototype of {function}. |
| 1306 | Register const scratch = r5; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1307 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1308 | DCHECK(object.is(InstanceOfDescriptor::LeftRegister())); |
| 1309 | DCHECK(function.is(InstanceOfDescriptor::RightRegister())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1310 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1311 | // Check if {object} is a smi. |
| 1312 | Label object_is_smi; |
| 1313 | __ JumpIfSmi(object, &object_is_smi); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1314 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1315 | // Lookup the {function} and the {object} map in the global instanceof cache. |
| 1316 | // Note: This is safe because we clear the global instanceof cache whenever |
| 1317 | // we change the prototype of any object. |
| 1318 | Label fast_case, slow_case; |
| 1319 | __ ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1320 | __ CompareRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
| 1321 | __ b(ne, &fast_case); |
| 1322 | __ CompareRoot(object_map, Heap::kInstanceofCacheMapRootIndex); |
| 1323 | __ b(ne, &fast_case); |
| 1324 | __ LoadRoot(r0, Heap::kInstanceofCacheAnswerRootIndex); |
| 1325 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1326 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1327 | // If {object} is a smi we can safely return false if {function} is a JS |
| 1328 | // function, otherwise we have to miss to the runtime and throw an exception. |
| 1329 | __ bind(&object_is_smi); |
| 1330 | __ JumpIfSmi(function, &slow_case); |
| 1331 | __ CompareObjectType(function, function_map, scratch, JS_FUNCTION_TYPE); |
| 1332 | __ b(ne, &slow_case); |
| 1333 | __ LoadRoot(r0, Heap::kFalseValueRootIndex); |
| 1334 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1335 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1336 | // Fast-case: The {function} must be a valid JSFunction. |
| 1337 | __ bind(&fast_case); |
| 1338 | __ JumpIfSmi(function, &slow_case); |
| 1339 | __ CompareObjectType(function, function_map, scratch, JS_FUNCTION_TYPE); |
| 1340 | __ b(ne, &slow_case); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1341 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1342 | // Ensure that {function} has an instance prototype. |
| 1343 | __ ldrb(scratch, FieldMemOperand(function_map, Map::kBitFieldOffset)); |
| 1344 | __ tst(scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| 1345 | __ b(ne, &slow_case); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1346 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1347 | // Get the "prototype" (or initial map) of the {function}. |
| 1348 | __ ldr(function_prototype, |
| 1349 | FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 1350 | __ AssertNotSmi(function_prototype); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1351 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1352 | // Resolve the prototype if the {function} has an initial map. Afterwards the |
| 1353 | // {function_prototype} will be either the JSReceiver prototype object or the |
| 1354 | // hole value, which means that no instances of the {function} were created so |
| 1355 | // far and hence we should return false. |
| 1356 | Label function_prototype_valid; |
| 1357 | __ CompareObjectType(function_prototype, scratch, scratch, MAP_TYPE); |
| 1358 | __ b(ne, &function_prototype_valid); |
| 1359 | __ ldr(function_prototype, |
| 1360 | FieldMemOperand(function_prototype, Map::kPrototypeOffset)); |
| 1361 | __ bind(&function_prototype_valid); |
| 1362 | __ AssertNotSmi(function_prototype); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1363 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1364 | // Update the global instanceof cache with the current {object} map and |
| 1365 | // {function}. The cached answer will be set when it is known below. |
| 1366 | __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex); |
| 1367 | __ StoreRoot(object_map, Heap::kInstanceofCacheMapRootIndex); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1368 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1369 | // Loop through the prototype chain looking for the {function} prototype. |
| 1370 | // Assume true, and change to false if not found. |
| 1371 | Register const object_instance_type = function_map; |
| 1372 | Register const map_bit_field = function_map; |
| 1373 | Register const null = scratch; |
| 1374 | Register const result = r0; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1375 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1376 | Label done, loop, fast_runtime_fallback; |
| 1377 | __ LoadRoot(result, Heap::kTrueValueRootIndex); |
| 1378 | __ LoadRoot(null, Heap::kNullValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1379 | __ bind(&loop); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1380 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1381 | // Check if the object needs to be access checked. |
| 1382 | __ ldrb(map_bit_field, FieldMemOperand(object_map, Map::kBitFieldOffset)); |
| 1383 | __ tst(map_bit_field, Operand(1 << Map::kIsAccessCheckNeeded)); |
| 1384 | __ b(ne, &fast_runtime_fallback); |
| 1385 | // Check if the current object is a Proxy. |
| 1386 | __ CompareInstanceType(object_map, object_instance_type, JS_PROXY_TYPE); |
| 1387 | __ b(eq, &fast_runtime_fallback); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1388 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1389 | __ ldr(object, FieldMemOperand(object_map, Map::kPrototypeOffset)); |
| 1390 | __ cmp(object, function_prototype); |
| 1391 | __ b(eq, &done); |
| 1392 | __ cmp(object, null); |
| 1393 | __ ldr(object_map, FieldMemOperand(object, HeapObject::kMapOffset)); |
| 1394 | __ b(ne, &loop); |
| 1395 | __ LoadRoot(result, Heap::kFalseValueRootIndex); |
| 1396 | __ bind(&done); |
| 1397 | __ StoreRoot(result, Heap::kInstanceofCacheAnswerRootIndex); |
| 1398 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1399 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1400 | // Found Proxy or access check needed: Call the runtime |
| 1401 | __ bind(&fast_runtime_fallback); |
| 1402 | __ Push(object, function_prototype); |
| 1403 | // Invalidate the instanceof cache. |
| 1404 | __ Move(scratch, Smi::FromInt(0)); |
| 1405 | __ StoreRoot(scratch, Heap::kInstanceofCacheFunctionRootIndex); |
| 1406 | __ TailCallRuntime(Runtime::kHasInPrototypeChain); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1407 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1408 | // Slow-case: Call the %InstanceOf runtime function. |
| 1409 | __ bind(&slow_case); |
| 1410 | __ Push(object, function); |
| 1411 | __ TailCallRuntime(Runtime::kInstanceOf); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1412 | } |
| 1413 | |
| 1414 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1415 | void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| 1416 | Label miss; |
| 1417 | Register receiver = LoadDescriptor::ReceiverRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1418 | // Ensure that the vector and slot registers won't be clobbered before |
| 1419 | // calling the miss handler. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1420 | DCHECK(!AreAliased(r4, r5, LoadWithVectorDescriptor::VectorRegister(), |
| 1421 | LoadWithVectorDescriptor::SlotRegister())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1422 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1423 | NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, r4, |
| 1424 | r5, &miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1425 | __ bind(&miss); |
| 1426 | PropertyAccessCompiler::TailCallBuiltin( |
| 1427 | masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC)); |
| 1428 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1429 | |
| 1430 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1431 | void LoadIndexedStringStub::Generate(MacroAssembler* masm) { |
| 1432 | // Return address is in lr. |
| 1433 | Label miss; |
| 1434 | |
| 1435 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 1436 | Register index = LoadDescriptor::NameRegister(); |
| 1437 | Register scratch = r5; |
| 1438 | Register result = r0; |
| 1439 | DCHECK(!scratch.is(receiver) && !scratch.is(index)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1440 | DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) && |
| 1441 | result.is(LoadWithVectorDescriptor::SlotRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1442 | |
| 1443 | // StringCharAtGenerator doesn't use the result register until it's passed |
| 1444 | // the different miss possibilities. If it did, we would have a conflict |
| 1445 | // when FLAG_vector_ics is true. |
| 1446 | StringCharAtGenerator char_at_generator(receiver, index, scratch, result, |
| 1447 | &miss, // When not a string. |
| 1448 | &miss, // When not a number. |
| 1449 | &miss, // When index out of range. |
| 1450 | STRING_INDEX_IS_ARRAY_INDEX, |
| 1451 | RECEIVER_IS_STRING); |
| 1452 | char_at_generator.GenerateFast(masm); |
| 1453 | __ Ret(); |
| 1454 | |
| 1455 | StubRuntimeCallHelper call_helper; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1456 | char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1457 | |
| 1458 | __ bind(&miss); |
| 1459 | PropertyAccessCompiler::TailCallBuiltin( |
| 1460 | masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| 1461 | } |
| 1462 | |
| 1463 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1464 | void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) { |
| 1465 | // The displacement is the offset of the last parameter (if any) |
| 1466 | // relative to the frame pointer. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1467 | const int kDisplacement = |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1468 | StandardFrameConstants::kCallerSPOffset - kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1469 | DCHECK(r1.is(ArgumentsAccessReadDescriptor::index())); |
| 1470 | DCHECK(r0.is(ArgumentsAccessReadDescriptor::parameter_count())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1471 | |
| 1472 | // Check that the key is a smi. |
| 1473 | Label slow; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1474 | __ JumpIfNotSmi(r1, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1475 | |
| 1476 | // Check if the calling frame is an arguments adaptor frame. |
| 1477 | Label adaptor; |
| 1478 | __ ldr(r2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1479 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kContextOffset)); |
| 1480 | __ cmp(r3, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1481 | __ b(eq, &adaptor); |
| 1482 | |
| 1483 | // Check index against formal parameters count limit passed in |
| 1484 | // through register r0. Use unsigned comparison to get negative |
| 1485 | // check for free. |
| 1486 | __ cmp(r1, r0); |
Ben Murdoch | 086aeea | 2011-05-13 15:57:08 +0100 | [diff] [blame] | 1487 | __ b(hs, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1488 | |
| 1489 | // Read the argument from the stack and return it. |
| 1490 | __ sub(r3, r0, r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1491 | __ add(r3, fp, Operand::PointerOffsetFromSmiKey(r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1492 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
| 1493 | __ Jump(lr); |
| 1494 | |
| 1495 | // Arguments adaptor case: Check index against actual arguments |
| 1496 | // limit found in the arguments adaptor frame. Use unsigned |
| 1497 | // comparison to get negative check for free. |
| 1498 | __ bind(&adaptor); |
| 1499 | __ ldr(r0, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1500 | __ cmp(r1, r0); |
| 1501 | __ b(cs, &slow); |
| 1502 | |
| 1503 | // Read the argument from the adaptor frame and return it. |
| 1504 | __ sub(r3, r0, r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1505 | __ add(r3, r2, Operand::PointerOffsetFromSmiKey(r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1506 | __ ldr(r0, MemOperand(r3, kDisplacement)); |
| 1507 | __ Jump(lr); |
| 1508 | |
| 1509 | // Slow-case: Handle non-smi or out-of-bounds access to arguments |
| 1510 | // by calling the runtime system. |
| 1511 | __ bind(&slow); |
| 1512 | __ push(r1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1513 | __ TailCallRuntime(Runtime::kArguments); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1514 | } |
| 1515 | |
| 1516 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1517 | void ArgumentsAccessStub::GenerateNewSloppySlow(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1518 | // r1 : function |
| 1519 | // r2 : number of parameters (tagged) |
| 1520 | // r3 : parameters pointer |
| 1521 | |
| 1522 | DCHECK(r1.is(ArgumentsAccessNewDescriptor::function())); |
| 1523 | DCHECK(r2.is(ArgumentsAccessNewDescriptor::parameter_count())); |
| 1524 | DCHECK(r3.is(ArgumentsAccessNewDescriptor::parameter_pointer())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1525 | |
| 1526 | // Check if the calling frame is an arguments adaptor frame. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1527 | Label runtime; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1528 | __ ldr(r4, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1529 | __ ldr(r0, MemOperand(r4, StandardFrameConstants::kContextOffset)); |
| 1530 | __ cmp(r0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1531 | __ b(ne, &runtime); |
| 1532 | |
| 1533 | // Patch the arguments.length and the parameters pointer in the current frame. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1534 | __ ldr(r2, MemOperand(r4, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1535 | __ add(r4, r4, Operand(r2, LSL, 1)); |
| 1536 | __ add(r3, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1537 | |
| 1538 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1539 | __ Push(r1, r3, r2); |
| 1540 | __ TailCallRuntime(Runtime::kNewSloppyArguments); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1541 | } |
| 1542 | |
| 1543 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1544 | void ArgumentsAccessStub::GenerateNewSloppyFast(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1545 | // r1 : function |
| 1546 | // r2 : number of parameters (tagged) |
| 1547 | // r3 : parameters pointer |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1548 | // Registers used over whole function: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1549 | // r5 : arguments count (tagged) |
| 1550 | // r6 : mapped parameter count (tagged) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1551 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1552 | DCHECK(r1.is(ArgumentsAccessNewDescriptor::function())); |
| 1553 | DCHECK(r2.is(ArgumentsAccessNewDescriptor::parameter_count())); |
| 1554 | DCHECK(r3.is(ArgumentsAccessNewDescriptor::parameter_pointer())); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1555 | |
| 1556 | // Check if the calling frame is an arguments adaptor frame. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1557 | Label adaptor_frame, try_allocate, runtime; |
| 1558 | __ ldr(r4, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1559 | __ ldr(r0, MemOperand(r4, StandardFrameConstants::kContextOffset)); |
| 1560 | __ cmp(r0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1561 | __ b(eq, &adaptor_frame); |
| 1562 | |
| 1563 | // No adaptor, parameter count = argument count. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1564 | __ mov(r5, r2); |
| 1565 | __ mov(r6, r2); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1566 | __ b(&try_allocate); |
| 1567 | |
| 1568 | // We have an adaptor frame. Patch the parameters pointer. |
| 1569 | __ bind(&adaptor_frame); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1570 | __ ldr(r5, MemOperand(r4, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1571 | __ add(r4, r4, Operand(r5, LSL, 1)); |
| 1572 | __ add(r3, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1573 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1574 | // r5 = argument count (tagged) |
| 1575 | // r6 = parameter count (tagged) |
| 1576 | // Compute the mapped parameter count = min(r6, r5) in r6. |
| 1577 | __ mov(r6, r2); |
| 1578 | __ cmp(r6, Operand(r5)); |
| 1579 | __ mov(r6, Operand(r5), LeaveCC, gt); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1580 | |
| 1581 | __ bind(&try_allocate); |
| 1582 | |
| 1583 | // Compute the sizes of backing store, parameter map, and arguments object. |
| 1584 | // 1. Parameter map, has 2 extra words containing context and backing store. |
| 1585 | const int kParameterMapHeaderSize = |
| 1586 | FixedArray::kHeaderSize + 2 * kPointerSize; |
| 1587 | // If there are no mapped parameters, we do not need the parameter_map. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1588 | __ cmp(r6, Operand(Smi::FromInt(0))); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1589 | __ mov(r9, Operand::Zero(), LeaveCC, eq); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1590 | __ mov(r9, Operand(r6, LSL, 1), LeaveCC, ne); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1591 | __ add(r9, r9, Operand(kParameterMapHeaderSize), LeaveCC, ne); |
| 1592 | |
| 1593 | // 2. Backing store. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1594 | __ add(r9, r9, Operand(r5, LSL, 1)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1595 | __ add(r9, r9, Operand(FixedArray::kHeaderSize)); |
| 1596 | |
| 1597 | // 3. Arguments object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1598 | __ add(r9, r9, Operand(Heap::kSloppyArgumentsObjectSize)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1599 | |
| 1600 | // Do the allocation of all three objects in one go. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1601 | __ Allocate(r9, r0, r9, r4, &runtime, TAG_OBJECT); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1602 | |
| 1603 | // r0 = address of new object(s) (tagged) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1604 | // r2 = argument count (smi-tagged) |
| 1605 | // Get the arguments boilerplate from the current native context into r4. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1606 | const int kNormalOffset = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1607 | Context::SlotOffset(Context::SLOPPY_ARGUMENTS_MAP_INDEX); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1608 | const int kAliasedOffset = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1609 | Context::SlotOffset(Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1610 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1611 | __ ldr(r4, NativeContextMemOperand()); |
| 1612 | __ cmp(r6, Operand::Zero()); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1613 | __ ldr(r4, MemOperand(r4, kNormalOffset), eq); |
| 1614 | __ ldr(r4, MemOperand(r4, kAliasedOffset), ne); |
| 1615 | |
| 1616 | // r0 = address of new object (tagged) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1617 | // r2 = argument count (smi-tagged) |
| 1618 | // r4 = address of arguments map (tagged) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1619 | // r6 = mapped parameter count (tagged) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1620 | __ str(r4, FieldMemOperand(r0, JSObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1621 | __ LoadRoot(r9, Heap::kEmptyFixedArrayRootIndex); |
| 1622 | __ str(r9, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 1623 | __ str(r9, FieldMemOperand(r0, JSObject::kElementsOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1624 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1625 | // Set up the callee in-object property. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1626 | STATIC_ASSERT(Heap::kArgumentsCalleeIndex == 1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1627 | __ AssertNotSmi(r1); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1628 | const int kCalleeOffset = JSObject::kHeaderSize + |
| 1629 | Heap::kArgumentsCalleeIndex * kPointerSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1630 | __ str(r1, FieldMemOperand(r0, kCalleeOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1631 | |
| 1632 | // Use the length (smi tagged) and set that as an in-object property too. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1633 | __ AssertSmi(r5); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1634 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
| 1635 | const int kLengthOffset = JSObject::kHeaderSize + |
| 1636 | Heap::kArgumentsLengthIndex * kPointerSize; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1637 | __ str(r5, FieldMemOperand(r0, kLengthOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1638 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1639 | // Set up the elements pointer in the allocated arguments object. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1640 | // If we allocated a parameter map, r4 will point there, otherwise |
| 1641 | // it will point to the backing store. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1642 | __ add(r4, r0, Operand(Heap::kSloppyArgumentsObjectSize)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1643 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 1644 | |
| 1645 | // r0 = address of new object (tagged) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1646 | // r2 = argument count (tagged) |
| 1647 | // r4 = address of parameter map or backing store (tagged) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1648 | // r6 = mapped parameter count (tagged) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1649 | // Initialize parameter map. If there are no mapped arguments, we're done. |
| 1650 | Label skip_parameter_map; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1651 | __ cmp(r6, Operand(Smi::FromInt(0))); |
| 1652 | // Move backing store address to r1, because it is |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1653 | // expected there when filling in the unmapped arguments. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1654 | __ mov(r1, r4, LeaveCC, eq); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1655 | __ b(eq, &skip_parameter_map); |
| 1656 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1657 | __ LoadRoot(r5, Heap::kSloppyArgumentsElementsMapRootIndex); |
| 1658 | __ str(r5, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 1659 | __ add(r5, r6, Operand(Smi::FromInt(2))); |
| 1660 | __ str(r5, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1661 | __ str(cp, FieldMemOperand(r4, FixedArray::kHeaderSize + 0 * kPointerSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1662 | __ add(r5, r4, Operand(r6, LSL, 1)); |
| 1663 | __ add(r5, r5, Operand(kParameterMapHeaderSize)); |
| 1664 | __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + 1 * kPointerSize)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1665 | |
| 1666 | // Copy the parameter slots and the holes in the arguments. |
| 1667 | // We need to fill in mapped_parameter_count slots. They index the context, |
| 1668 | // where parameters are stored in reverse order, at |
| 1669 | // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| 1670 | // The mapped parameter thus need to get indices |
| 1671 | // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| 1672 | // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| 1673 | // We loop from right to left. |
| 1674 | Label parameters_loop, parameters_test; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1675 | __ mov(r5, r6); |
| 1676 | __ add(r9, r2, Operand(Smi::FromInt(Context::MIN_CONTEXT_SLOTS))); |
| 1677 | __ sub(r9, r9, Operand(r6)); |
| 1678 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 1679 | __ add(r1, r4, Operand(r5, LSL, 1)); |
| 1680 | __ add(r1, r1, Operand(kParameterMapHeaderSize)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1681 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1682 | // r1 = address of backing store (tagged) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1683 | // r4 = address of parameter map (tagged), which is also the address of new |
| 1684 | // object + Heap::kSloppyArgumentsObjectSize (tagged) |
| 1685 | // r0 = temporary scratch (a.o., for address calculation) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1686 | // r5 = loop variable (tagged) |
| 1687 | // ip = the hole value |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1688 | __ jmp(¶meters_test); |
| 1689 | |
| 1690 | __ bind(¶meters_loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1691 | __ sub(r5, r5, Operand(Smi::FromInt(1))); |
| 1692 | __ mov(r0, Operand(r5, LSL, 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1693 | __ add(r0, r0, Operand(kParameterMapHeaderSize - kHeapObjectTag)); |
| 1694 | __ str(r9, MemOperand(r4, r0)); |
| 1695 | __ sub(r0, r0, Operand(kParameterMapHeaderSize - FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1696 | __ str(ip, MemOperand(r1, r0)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1697 | __ add(r9, r9, Operand(Smi::FromInt(1))); |
| 1698 | __ bind(¶meters_test); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1699 | __ cmp(r5, Operand(Smi::FromInt(0))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1700 | __ b(ne, ¶meters_loop); |
| 1701 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1702 | // Restore r0 = new object (tagged) and r5 = argument count (tagged). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1703 | __ sub(r0, r4, Operand(Heap::kSloppyArgumentsObjectSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1704 | __ ldr(r5, FieldMemOperand(r0, kLengthOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1705 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1706 | __ bind(&skip_parameter_map); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1707 | // r0 = address of new object (tagged) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1708 | // r1 = address of backing store (tagged) |
| 1709 | // r5 = argument count (tagged) |
| 1710 | // r6 = mapped parameter count (tagged) |
| 1711 | // r9 = scratch |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1712 | // Copy arguments header and remaining slots (if there are any). |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1713 | __ LoadRoot(r9, Heap::kFixedArrayMapRootIndex); |
| 1714 | __ str(r9, FieldMemOperand(r1, FixedArray::kMapOffset)); |
| 1715 | __ str(r5, FieldMemOperand(r1, FixedArray::kLengthOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1716 | |
| 1717 | Label arguments_loop, arguments_test; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1718 | __ sub(r3, r3, Operand(r6, LSL, 1)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1719 | __ jmp(&arguments_test); |
| 1720 | |
| 1721 | __ bind(&arguments_loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1722 | __ sub(r3, r3, Operand(kPointerSize)); |
| 1723 | __ ldr(r4, MemOperand(r3, 0)); |
| 1724 | __ add(r9, r1, Operand(r6, LSL, 1)); |
| 1725 | __ str(r4, FieldMemOperand(r9, FixedArray::kHeaderSize)); |
| 1726 | __ add(r6, r6, Operand(Smi::FromInt(1))); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1727 | |
| 1728 | __ bind(&arguments_test); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1729 | __ cmp(r6, Operand(r5)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1730 | __ b(lt, &arguments_loop); |
| 1731 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1732 | // Return. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1733 | __ Ret(); |
| 1734 | |
| 1735 | // Do the runtime call to allocate the arguments object. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1736 | // r0 = address of new object (tagged) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1737 | // r5 = argument count (tagged) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1738 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1739 | __ Push(r1, r3, r5); |
| 1740 | __ TailCallRuntime(Runtime::kNewSloppyArguments); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | |
| 1744 | void LoadIndexedInterceptorStub::Generate(MacroAssembler* masm) { |
| 1745 | // Return address is in lr. |
| 1746 | Label slow; |
| 1747 | |
| 1748 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 1749 | Register key = LoadDescriptor::NameRegister(); |
| 1750 | |
| 1751 | // Check that the key is an array index, that is Uint32. |
| 1752 | __ NonNegativeSmiTst(key); |
| 1753 | __ b(ne, &slow); |
| 1754 | |
| 1755 | // Everything is fine, call runtime. |
| 1756 | __ Push(receiver, key); // Receiver, key. |
| 1757 | |
| 1758 | // Perform tail call to the entry. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1759 | __ TailCallRuntime(Runtime::kLoadElementWithInterceptor); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1760 | |
| 1761 | __ bind(&slow); |
| 1762 | PropertyAccessCompiler::TailCallBuiltin( |
| 1763 | masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1764 | } |
| 1765 | |
| 1766 | |
| 1767 | void ArgumentsAccessStub::GenerateNewStrict(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1768 | // r1 : function |
| 1769 | // r2 : number of parameters (tagged) |
| 1770 | // r3 : parameters pointer |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1771 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1772 | DCHECK(r1.is(ArgumentsAccessNewDescriptor::function())); |
| 1773 | DCHECK(r2.is(ArgumentsAccessNewDescriptor::parameter_count())); |
| 1774 | DCHECK(r3.is(ArgumentsAccessNewDescriptor::parameter_pointer())); |
| 1775 | |
| 1776 | // Check if the calling frame is an arguments adaptor frame. |
| 1777 | Label try_allocate, runtime; |
| 1778 | __ ldr(r4, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1779 | __ ldr(r0, MemOperand(r4, StandardFrameConstants::kContextOffset)); |
| 1780 | __ cmp(r0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1781 | __ b(ne, &try_allocate); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1782 | |
| 1783 | // Patch the arguments.length and the parameters pointer. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1784 | __ ldr(r2, MemOperand(r4, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1785 | __ add(r4, r4, Operand::PointerOffsetFromSmiKey(r2)); |
| 1786 | __ add(r3, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1787 | |
| 1788 | // Try the new space allocation. Start out with computing the size |
| 1789 | // of the arguments object and the elements array in words. |
| 1790 | Label add_arguments_object; |
| 1791 | __ bind(&try_allocate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1792 | __ SmiUntag(r9, r2, SetCC); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1793 | __ b(eq, &add_arguments_object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1794 | __ add(r9, r9, Operand(FixedArray::kHeaderSize / kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1795 | __ bind(&add_arguments_object); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1796 | __ add(r9, r9, Operand(Heap::kStrictArgumentsObjectSize / kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1797 | |
| 1798 | // Do the allocation of both objects in one go. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1799 | __ Allocate(r9, r0, r4, r5, &runtime, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1800 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1801 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1802 | // Get the arguments boilerplate from the current native context. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1803 | __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, r4); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1804 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1805 | __ str(r4, FieldMemOperand(r0, JSObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1806 | __ LoadRoot(r5, Heap::kEmptyFixedArrayRootIndex); |
| 1807 | __ str(r5, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 1808 | __ str(r5, FieldMemOperand(r0, JSObject::kElementsOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1809 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1810 | // Get the length (smi tagged) and set that as an in-object property too. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1811 | STATIC_ASSERT(Heap::kArgumentsLengthIndex == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1812 | __ AssertSmi(r2); |
| 1813 | __ str(r2, |
| 1814 | FieldMemOperand(r0, JSObject::kHeaderSize + |
| 1815 | Heap::kArgumentsLengthIndex * kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1816 | |
| 1817 | // If there are no actual arguments, we're done. |
| 1818 | Label done; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1819 | __ cmp(r2, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1820 | __ b(eq, &done); |
| 1821 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1822 | // Set up the elements pointer in the allocated arguments object and |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1823 | // initialize the header in the elements fixed array. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1824 | __ add(r4, r0, Operand(Heap::kStrictArgumentsObjectSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1825 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1826 | __ LoadRoot(r5, Heap::kFixedArrayMapRootIndex); |
| 1827 | __ str(r5, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 1828 | __ str(r2, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
| 1829 | __ SmiUntag(r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1830 | |
| 1831 | // Copy the fixed array slots. |
| 1832 | Label loop; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1833 | // Set up r4 to point to the first array slot. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1834 | __ add(r4, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 1835 | __ bind(&loop); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1836 | // Pre-decrement r3 with kPointerSize on each iteration. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1837 | // Pre-decrement in order to skip receiver. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1838 | __ ldr(r5, MemOperand(r3, kPointerSize, NegPreIndex)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1839 | // Post-increment r4 with kPointerSize on each iteration. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1840 | __ str(r5, MemOperand(r4, kPointerSize, PostIndex)); |
| 1841 | __ sub(r2, r2, Operand(1)); |
| 1842 | __ cmp(r2, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1843 | __ b(ne, &loop); |
| 1844 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1845 | // Return. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1846 | __ bind(&done); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1847 | __ Ret(); |
| 1848 | |
| 1849 | // Do the runtime call to allocate the arguments object. |
| 1850 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1851 | __ Push(r1, r3, r2); |
| 1852 | __ TailCallRuntime(Runtime::kNewStrictArguments); |
| 1853 | } |
| 1854 | |
| 1855 | |
| 1856 | void RestParamAccessStub::GenerateNew(MacroAssembler* masm) { |
| 1857 | // r2 : number of parameters (tagged) |
| 1858 | // r3 : parameters pointer |
| 1859 | // r4 : rest parameter index (tagged) |
| 1860 | |
| 1861 | Label runtime; |
| 1862 | __ ldr(r5, MemOperand(fp, StandardFrameConstants::kCallerFPOffset)); |
| 1863 | __ ldr(r0, MemOperand(r5, StandardFrameConstants::kContextOffset)); |
| 1864 | __ cmp(r0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1865 | __ b(ne, &runtime); |
| 1866 | |
| 1867 | // Patch the arguments.length and the parameters pointer. |
| 1868 | __ ldr(r2, MemOperand(r5, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 1869 | __ add(r3, r5, Operand::PointerOffsetFromSmiKey(r2)); |
| 1870 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 1871 | |
| 1872 | __ bind(&runtime); |
| 1873 | __ Push(r2, r3, r4); |
| 1874 | __ TailCallRuntime(Runtime::kNewRestParam); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1875 | } |
| 1876 | |
| 1877 | |
| 1878 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 1879 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 1880 | // time or if regexp entry in generated code is turned off runtime switch or |
| 1881 | // at compilation. |
| 1882 | #ifdef V8_INTERPRETED_REGEXP |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1883 | __ TailCallRuntime(Runtime::kRegExpExec); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1884 | #else // V8_INTERPRETED_REGEXP |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1885 | |
| 1886 | // Stack frame on entry. |
| 1887 | // sp[0]: last_match_info (expected JSArray) |
| 1888 | // sp[4]: previous index |
| 1889 | // sp[8]: subject string |
| 1890 | // sp[12]: JSRegExp object |
| 1891 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1892 | const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 1893 | const int kPreviousIndexOffset = 1 * kPointerSize; |
| 1894 | const int kSubjectOffset = 2 * kPointerSize; |
| 1895 | const int kJSRegExpOffset = 3 * kPointerSize; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1896 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1897 | Label runtime; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1898 | // Allocation of registers for this function. These are in callee save |
| 1899 | // registers and will be preserved by the call to the native RegExp code, as |
| 1900 | // this code is called using the normal C calling convention. When calling |
| 1901 | // directly from generated code the native RegExp code will not do a GC and |
| 1902 | // therefore the content of these registers are safe to use after the call. |
| 1903 | Register subject = r4; |
| 1904 | Register regexp_data = r5; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1905 | Register last_match_info_elements = no_reg; // will be r6; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1906 | |
| 1907 | // Ensure that a RegExp stack is allocated. |
| 1908 | ExternalReference address_of_regexp_stack_memory_address = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1909 | ExternalReference::address_of_regexp_stack_memory_address(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1910 | ExternalReference address_of_regexp_stack_memory_size = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1911 | ExternalReference::address_of_regexp_stack_memory_size(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1912 | __ mov(r0, Operand(address_of_regexp_stack_memory_size)); |
| 1913 | __ ldr(r0, MemOperand(r0, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1914 | __ cmp(r0, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1915 | __ b(eq, &runtime); |
| 1916 | |
| 1917 | // Check that the first argument is a JSRegExp object. |
| 1918 | __ ldr(r0, MemOperand(sp, kJSRegExpOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1919 | __ JumpIfSmi(r0, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1920 | __ CompareObjectType(r0, r1, r1, JS_REGEXP_TYPE); |
| 1921 | __ b(ne, &runtime); |
| 1922 | |
| 1923 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 1924 | __ ldr(regexp_data, FieldMemOperand(r0, JSRegExp::kDataOffset)); |
| 1925 | if (FLAG_debug_code) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1926 | __ SmiTst(regexp_data); |
| 1927 | __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1928 | __ CompareObjectType(regexp_data, r0, r0, FIXED_ARRAY_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1929 | __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1930 | } |
| 1931 | |
| 1932 | // regexp_data: RegExp data (FixedArray) |
| 1933 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 1934 | __ ldr(r0, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 1935 | __ cmp(r0, Operand(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 1936 | __ b(ne, &runtime); |
| 1937 | |
| 1938 | // regexp_data: RegExp data (FixedArray) |
| 1939 | // Check that the number of captures fit in the static offsets vector buffer. |
| 1940 | __ ldr(r2, |
| 1941 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1942 | // Check (number_of_captures + 1) * 2 <= offsets vector size |
| 1943 | // Or number_of_captures * 2 <= offsets vector size - 2 |
| 1944 | // Multiplying by 2 comes for free since r2 is smi-tagged. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1945 | STATIC_ASSERT(kSmiTag == 0); |
| 1946 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1947 | STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| 1948 | __ cmp(r2, Operand(Isolate::kJSRegexpStaticOffsetsVectorSize - 2)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1949 | __ b(hi, &runtime); |
| 1950 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1951 | // Reset offset for possibly sliced string. |
| 1952 | __ mov(r9, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1953 | __ ldr(subject, MemOperand(sp, kSubjectOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1954 | __ JumpIfSmi(subject, &runtime); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1955 | __ mov(r3, subject); // Make a copy of the original subject string. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1956 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 1957 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1958 | // subject: subject string |
| 1959 | // r3: subject string |
| 1960 | // r0: subject string instance type |
| 1961 | // regexp_data: RegExp data (FixedArray) |
| 1962 | // Handle subject string according to its encoding and representation: |
| 1963 | // (1) Sequential string? If yes, go to (5). |
| 1964 | // (2) Anything but sequential or cons? If yes, go to (6). |
| 1965 | // (3) Cons string. If the string is flat, replace subject with first string. |
| 1966 | // Otherwise bailout. |
| 1967 | // (4) Is subject external? If yes, go to (7). |
| 1968 | // (5) Sequential string. Load regexp code according to encoding. |
| 1969 | // (E) Carry on. |
| 1970 | /// [...] |
| 1971 | |
| 1972 | // Deferred code at the end of the stub: |
| 1973 | // (6) Not a long external string? If yes, go to (8). |
| 1974 | // (7) External string. Make it, offset-wise, look like a sequential string. |
| 1975 | // Go to (5). |
| 1976 | // (8) Short external string or not a string? If yes, bail out to runtime. |
| 1977 | // (9) Sliced string. Replace subject with parent. Go to (4). |
| 1978 | |
| 1979 | Label seq_string /* 5 */, external_string /* 7 */, |
| 1980 | check_underlying /* 4 */, not_seq_nor_cons /* 6 */, |
| 1981 | not_long_external /* 8 */; |
| 1982 | |
| 1983 | // (1) Sequential string? If yes, go to (5). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1984 | __ and_(r1, |
| 1985 | r0, |
| 1986 | Operand(kIsNotStringMask | |
| 1987 | kStringRepresentationMask | |
| 1988 | kShortExternalStringMask), |
| 1989 | SetCC); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1990 | STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1991 | __ b(eq, &seq_string); // Go to (5). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1992 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1993 | // (2) Anything but sequential or cons? If yes, go to (6). |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1994 | STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| 1995 | STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1996 | STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| 1997 | STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1998 | __ cmp(r1, Operand(kExternalStringTag)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1999 | __ b(ge, ¬_seq_nor_cons); // Go to (6). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2000 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2001 | // (3) Cons string. Check that it's flat. |
| 2002 | // Replace subject with first string and reload instance type. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2003 | __ ldr(r0, FieldMemOperand(subject, ConsString::kSecondOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2004 | __ CompareRoot(r0, Heap::kempty_stringRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2005 | __ b(ne, &runtime); |
| 2006 | __ ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2007 | |
| 2008 | // (4) Is subject external? If yes, go to (7). |
| 2009 | __ bind(&check_underlying); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2010 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 2011 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2012 | STATIC_ASSERT(kSeqStringTag == 0); |
| 2013 | __ tst(r0, Operand(kStringRepresentationMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2014 | // The underlying external string is never a short external string. |
| 2015 | STATIC_ASSERT(ExternalString::kMaxShortLength < ConsString::kMinLength); |
| 2016 | STATIC_ASSERT(ExternalString::kMaxShortLength < SlicedString::kMinLength); |
| 2017 | __ b(ne, &external_string); // Go to (7). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2018 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2019 | // (5) Sequential string. Load regexp code according to encoding. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2020 | __ bind(&seq_string); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2021 | // subject: sequential subject string (or look-alike, external string) |
| 2022 | // r3: original subject string |
| 2023 | // Load previous index and check range before r3 is overwritten. We have to |
| 2024 | // use r3 instead of subject here because subject might have been only made |
| 2025 | // to look like a sequential string when it actually is an external string. |
| 2026 | __ ldr(r1, MemOperand(sp, kPreviousIndexOffset)); |
| 2027 | __ JumpIfNotSmi(r1, &runtime); |
| 2028 | __ ldr(r3, FieldMemOperand(r3, String::kLengthOffset)); |
| 2029 | __ cmp(r3, Operand(r1)); |
| 2030 | __ b(ls, &runtime); |
| 2031 | __ SmiUntag(r1); |
| 2032 | |
| 2033 | STATIC_ASSERT(4 == kOneByteStringTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2034 | STATIC_ASSERT(kTwoByteStringTag == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2035 | __ and_(r0, r0, Operand(kStringEncodingMask)); |
| 2036 | __ mov(r3, Operand(r0, ASR, 2), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2037 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataOneByteCodeOffset), |
| 2038 | ne); |
| 2039 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2040 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2041 | // (E) Carry on. String handling is done. |
| 2042 | // r6: irregexp code |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2043 | // Check that the irregexp code has been generated for the actual string |
| 2044 | // encoding. If it has, the field contains a code object otherwise it contains |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2045 | // a smi (code flushing support). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2046 | __ JumpIfSmi(r6, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2047 | |
| 2048 | // r1: previous index |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2049 | // r3: encoding of subject string (1 if one_byte, 0 if two_byte); |
| 2050 | // r6: code |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2051 | // subject: Subject string |
| 2052 | // regexp_data: RegExp data (FixedArray) |
| 2053 | // All checks done. Now push arguments for native regexp code. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2054 | __ IncrementCounter(isolate()->counters()->regexp_entry_native(), 1, r0, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2055 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2056 | // Isolates: note we add an additional parameter here (isolate pointer). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2057 | const int kRegExpExecuteArguments = 9; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2058 | const int kParameterRegisters = 4; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2059 | __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2060 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2061 | // Stack pointer now points to cell where return address is to be written. |
| 2062 | // Arguments are before that on the stack or in registers. |
| 2063 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2064 | // Argument 9 (sp[20]): Pass current isolate address. |
| 2065 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
| 2066 | __ str(r0, MemOperand(sp, 5 * kPointerSize)); |
| 2067 | |
| 2068 | // Argument 8 (sp[16]): Indicate that this is a direct call from JavaScript. |
| 2069 | __ mov(r0, Operand(1)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2070 | __ str(r0, MemOperand(sp, 4 * kPointerSize)); |
| 2071 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2072 | // Argument 7 (sp[12]): Start (high end) of backtracking stack memory area. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2073 | __ mov(r0, Operand(address_of_regexp_stack_memory_address)); |
| 2074 | __ ldr(r0, MemOperand(r0, 0)); |
| 2075 | __ mov(r2, Operand(address_of_regexp_stack_memory_size)); |
| 2076 | __ ldr(r2, MemOperand(r2, 0)); |
| 2077 | __ add(r0, r0, Operand(r2)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2078 | __ str(r0, MemOperand(sp, 3 * kPointerSize)); |
| 2079 | |
| 2080 | // Argument 6: Set the number of capture registers to zero to force global |
| 2081 | // regexps to behave as non-global. This does not affect non-global regexps. |
| 2082 | __ mov(r0, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2083 | __ str(r0, MemOperand(sp, 2 * kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2084 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2085 | // Argument 5 (sp[4]): static offsets vector buffer. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2086 | __ mov(r0, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2087 | Operand(ExternalReference::address_of_static_offsets_vector( |
| 2088 | isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2089 | __ str(r0, MemOperand(sp, 1 * kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2090 | |
| 2091 | // For arguments 4 and 3 get string length, calculate start of string data and |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2092 | // calculate the shift of the index (0 for one-byte and 1 for two-byte). |
| 2093 | __ add(r7, subject, Operand(SeqString::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2094 | __ eor(r3, r3, Operand(1)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2095 | // Load the length from the original subject string from the previous stack |
| 2096 | // frame. Therefore we have to use fp, which points exactly to two pointer |
| 2097 | // sizes below the previous sp. (Because creating a new stack frame pushes |
| 2098 | // the previous fp onto the stack and moves up sp by 2 * kPointerSize.) |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2099 | __ ldr(subject, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2100 | // If slice offset is not 0, load the length from the original sliced string. |
| 2101 | // Argument 4, r3: End of string data |
| 2102 | // Argument 3, r2: Start of string data |
| 2103 | // Prepare start and end index of the input. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2104 | __ add(r9, r7, Operand(r9, LSL, r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2105 | __ add(r2, r9, Operand(r1, LSL, r3)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2106 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2107 | __ ldr(r7, FieldMemOperand(subject, String::kLengthOffset)); |
| 2108 | __ SmiUntag(r7); |
| 2109 | __ add(r3, r9, Operand(r7, LSL, r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2110 | |
| 2111 | // Argument 2 (r1): Previous index. |
| 2112 | // Already there |
| 2113 | |
| 2114 | // Argument 1 (r0): Subject string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2115 | __ mov(r0, subject); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2116 | |
| 2117 | // Locate the code entry and call it. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2118 | __ add(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 2119 | DirectCEntryStub stub(isolate()); |
| 2120 | stub.GenerateCall(masm, r6); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2121 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2122 | __ LeaveExitFrame(false, no_reg, true); |
| 2123 | |
| 2124 | last_match_info_elements = r6; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2125 | |
| 2126 | // r0: result |
| 2127 | // subject: subject string (callee saved) |
| 2128 | // regexp_data: RegExp data (callee saved) |
| 2129 | // last_match_info_elements: Last match info elements (callee saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2130 | // Check the result. |
| 2131 | Label success; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2132 | __ cmp(r0, Operand(1)); |
| 2133 | // We expect exactly one result since we force the called regexp to behave |
| 2134 | // as non-global. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2135 | __ b(eq, &success); |
| 2136 | Label failure; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2137 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::FAILURE)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2138 | __ b(eq, &failure); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2139 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2140 | // If not exception it can only be retry. Handle that in the runtime system. |
| 2141 | __ b(ne, &runtime); |
| 2142 | // Result must now be exception. If there is no pending exception already a |
| 2143 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 2144 | // haven't created the exception yet. Handle that in the runtime system. |
| 2145 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2146 | __ mov(r1, Operand(isolate()->factory()->the_hole_value())); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2147 | __ mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2148 | isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2149 | __ ldr(r0, MemOperand(r2, 0)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2150 | __ cmp(r0, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2151 | __ b(eq, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2152 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2153 | // For exception, throw the exception again. |
| 2154 | __ TailCallRuntime(Runtime::kRegExpExecReThrow); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2155 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2156 | __ bind(&failure); |
| 2157 | // For failure and exception return null. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2158 | __ mov(r0, Operand(isolate()->factory()->null_value())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2159 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 2160 | __ Ret(); |
| 2161 | |
| 2162 | // Process the result from the native regexp code. |
| 2163 | __ bind(&success); |
| 2164 | __ ldr(r1, |
| 2165 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 2166 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2167 | // Multiplying by 2 comes for free since r1 is smi-tagged. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2168 | STATIC_ASSERT(kSmiTag == 0); |
| 2169 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 2170 | __ add(r1, r1, Operand(2)); // r1 was a smi. |
| 2171 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2172 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 2173 | __ JumpIfSmi(r0, &runtime); |
| 2174 | __ CompareObjectType(r0, r2, r2, JS_ARRAY_TYPE); |
| 2175 | __ b(ne, &runtime); |
| 2176 | // Check that the JSArray is in fast case. |
| 2177 | __ ldr(last_match_info_elements, |
| 2178 | FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 2179 | __ ldr(r0, FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| 2180 | __ CompareRoot(r0, Heap::kFixedArrayMapRootIndex); |
| 2181 | __ b(ne, &runtime); |
| 2182 | // Check that the last match info has space for the capture registers and the |
| 2183 | // additional information. |
| 2184 | __ ldr(r0, |
| 2185 | FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| 2186 | __ add(r2, r1, Operand(RegExpImpl::kLastMatchOverhead)); |
| 2187 | __ cmp(r2, Operand::SmiUntag(r0)); |
| 2188 | __ b(gt, &runtime); |
| 2189 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2190 | // r1: number of capture registers |
| 2191 | // r4: subject string |
| 2192 | // Store the capture count. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2193 | __ SmiTag(r2, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2194 | __ str(r2, FieldMemOperand(last_match_info_elements, |
| 2195 | RegExpImpl::kLastCaptureCountOffset)); |
| 2196 | // Store last subject and last input. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2197 | __ str(subject, |
| 2198 | FieldMemOperand(last_match_info_elements, |
| 2199 | RegExpImpl::kLastSubjectOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2200 | __ mov(r2, subject); |
| 2201 | __ RecordWriteField(last_match_info_elements, |
| 2202 | RegExpImpl::kLastSubjectOffset, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2203 | subject, |
| 2204 | r3, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2205 | kLRHasNotBeenSaved, |
| 2206 | kDontSaveFPRegs); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2207 | __ mov(subject, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2208 | __ str(subject, |
| 2209 | FieldMemOperand(last_match_info_elements, |
| 2210 | RegExpImpl::kLastInputOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2211 | __ RecordWriteField(last_match_info_elements, |
| 2212 | RegExpImpl::kLastInputOffset, |
| 2213 | subject, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2214 | r3, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2215 | kLRHasNotBeenSaved, |
| 2216 | kDontSaveFPRegs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2217 | |
| 2218 | // Get the static offsets vector filled by the native regexp code. |
| 2219 | ExternalReference address_of_static_offsets_vector = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2220 | ExternalReference::address_of_static_offsets_vector(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2221 | __ mov(r2, Operand(address_of_static_offsets_vector)); |
| 2222 | |
| 2223 | // r1: number of capture registers |
| 2224 | // r2: offsets vector |
| 2225 | Label next_capture, done; |
| 2226 | // Capture register counter starts from number of capture registers and |
| 2227 | // counts down until wraping after zero. |
| 2228 | __ add(r0, |
| 2229 | last_match_info_elements, |
| 2230 | Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag)); |
| 2231 | __ bind(&next_capture); |
| 2232 | __ sub(r1, r1, Operand(1), SetCC); |
| 2233 | __ b(mi, &done); |
| 2234 | // Read the value from the static offsets vector buffer. |
| 2235 | __ ldr(r3, MemOperand(r2, kPointerSize, PostIndex)); |
| 2236 | // Store the smi value in the last match info. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2237 | __ SmiTag(r3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2238 | __ str(r3, MemOperand(r0, kPointerSize, PostIndex)); |
| 2239 | __ jmp(&next_capture); |
| 2240 | __ bind(&done); |
| 2241 | |
| 2242 | // Return last match info. |
| 2243 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 2244 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 2245 | __ Ret(); |
| 2246 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2247 | // Do the runtime call to execute the regexp. |
| 2248 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2249 | __ TailCallRuntime(Runtime::kRegExpExec); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2250 | |
| 2251 | // Deferred code for string handling. |
| 2252 | // (6) Not a long external string? If yes, go to (8). |
| 2253 | __ bind(¬_seq_nor_cons); |
| 2254 | // Compare flags are still set. |
| 2255 | __ b(gt, ¬_long_external); // Go to (8). |
| 2256 | |
| 2257 | // (7) External string. Make it, offset-wise, look like a sequential string. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2258 | __ bind(&external_string); |
| 2259 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 2260 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 2261 | if (FLAG_debug_code) { |
| 2262 | // Assert that we do not have a cons or slice (indirect strings) here. |
| 2263 | // Sequential strings have already been ruled out. |
| 2264 | __ tst(r0, Operand(kIsIndirectStringMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2265 | __ Assert(eq, kExternalStringExpectedButNotFound); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2266 | } |
| 2267 | __ ldr(subject, |
| 2268 | FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| 2269 | // Move the pointer so that offset-wise, it looks like a sequential string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2270 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2271 | __ sub(subject, |
| 2272 | subject, |
| 2273 | Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2274 | __ jmp(&seq_string); // Go to (5). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2275 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2276 | // (8) Short external string or not a string? If yes, bail out to runtime. |
| 2277 | __ bind(¬_long_external); |
| 2278 | STATIC_ASSERT(kNotStringTag != 0 && kShortExternalStringTag !=0); |
| 2279 | __ tst(r1, Operand(kIsNotStringMask | kShortExternalStringMask)); |
| 2280 | __ b(ne, &runtime); |
| 2281 | |
| 2282 | // (9) Sliced string. Replace subject with parent. Go to (4). |
| 2283 | // Load offset into r9 and replace subject string with parent. |
| 2284 | __ ldr(r9, FieldMemOperand(subject, SlicedString::kOffsetOffset)); |
| 2285 | __ SmiUntag(r9); |
| 2286 | __ ldr(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
| 2287 | __ jmp(&check_underlying); // Go to (4). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2288 | #endif // V8_INTERPRETED_REGEXP |
| 2289 | } |
| 2290 | |
| 2291 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2292 | static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) { |
| 2293 | // r0 : number of arguments to the construct function |
| 2294 | // r1 : the function to call |
| 2295 | // r2 : feedback vector |
| 2296 | // r3 : slot in feedback vector (Smi) |
| 2297 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 2298 | |
| 2299 | // Number-of-arguments register must be smi-tagged to call out. |
| 2300 | __ SmiTag(r0); |
| 2301 | __ Push(r3, r2, r1, r0); |
| 2302 | |
| 2303 | __ CallStub(stub); |
| 2304 | |
| 2305 | __ Pop(r3, r2, r1, r0); |
| 2306 | __ SmiUntag(r0); |
| 2307 | } |
| 2308 | |
| 2309 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2310 | static void GenerateRecordCallTarget(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2311 | // Cache the called function in a feedback vector slot. Cache states |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2312 | // are uninitialized, monomorphic (indicated by a JSFunction), and |
| 2313 | // megamorphic. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2314 | // r0 : number of arguments to the construct function |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2315 | // r1 : the function to call |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2316 | // r2 : feedback vector |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2317 | // r3 : slot in feedback vector (Smi) |
| 2318 | Label initialize, done, miss, megamorphic, not_array_function; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2319 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2320 | DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()), |
| 2321 | masm->isolate()->heap()->megamorphic_symbol()); |
| 2322 | DCHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(masm->isolate()), |
| 2323 | masm->isolate()->heap()->uninitialized_symbol()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2324 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2325 | // Load the cache state into r5. |
| 2326 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2327 | __ ldr(r5, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2328 | |
| 2329 | // A monomorphic cache hit or an already megamorphic state: invoke the |
| 2330 | // function without changing the state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2331 | // We don't know if r5 is a WeakCell or a Symbol, but it's harmless to read at |
| 2332 | // this position in a symbol (see static asserts in type-feedback-vector.h). |
| 2333 | Label check_allocation_site; |
| 2334 | Register feedback_map = r6; |
| 2335 | Register weak_value = r9; |
| 2336 | __ ldr(weak_value, FieldMemOperand(r5, WeakCell::kValueOffset)); |
| 2337 | __ cmp(r1, weak_value); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2338 | __ b(eq, &done); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2339 | __ CompareRoot(r5, Heap::kmegamorphic_symbolRootIndex); |
| 2340 | __ b(eq, &done); |
| 2341 | __ ldr(feedback_map, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 2342 | __ CompareRoot(feedback_map, Heap::kWeakCellMapRootIndex); |
| 2343 | __ b(ne, &check_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2344 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2345 | // If the weak cell is cleared, we have a new chance to become monomorphic. |
| 2346 | __ JumpIfSmi(weak_value, &initialize); |
| 2347 | __ jmp(&megamorphic); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2348 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2349 | __ bind(&check_allocation_site); |
| 2350 | // If we came here, we need to see if we are the array function. |
| 2351 | // If we didn't have a matching function, and we didn't find the megamorph |
| 2352 | // sentinel, then we have in the slot either some other function or an |
| 2353 | // AllocationSite. |
| 2354 | __ CompareRoot(feedback_map, Heap::kAllocationSiteMapRootIndex); |
| 2355 | __ b(ne, &miss); |
| 2356 | |
| 2357 | // Make sure the function is the Array() function |
| 2358 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 2359 | __ cmp(r1, r5); |
| 2360 | __ b(ne, &megamorphic); |
| 2361 | __ jmp(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2362 | |
| 2363 | __ bind(&miss); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2364 | |
| 2365 | // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| 2366 | // megamorphic. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2367 | __ CompareRoot(r5, Heap::kuninitialized_symbolRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2368 | __ b(eq, &initialize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2369 | // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 2370 | // write-barrier is needed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2371 | __ bind(&megamorphic); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2372 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2373 | __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2374 | __ str(ip, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2375 | __ jmp(&done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2376 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2377 | // An uninitialized cache is patched with the function |
| 2378 | __ bind(&initialize); |
| 2379 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2380 | // Make sure the function is the Array() function |
| 2381 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 2382 | __ cmp(r1, r5); |
| 2383 | __ b(ne, ¬_array_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2384 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2385 | // The target function is the Array constructor, |
| 2386 | // Create an AllocationSite if we don't already have it, store it in the |
| 2387 | // slot. |
| 2388 | CreateAllocationSiteStub create_stub(masm->isolate()); |
| 2389 | CallStubInRecordCallTarget(masm, &create_stub); |
| 2390 | __ b(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2391 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2392 | __ bind(¬_array_function); |
| 2393 | CreateWeakCellStub weak_cell_stub(masm->isolate()); |
| 2394 | CallStubInRecordCallTarget(masm, &weak_cell_stub); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2395 | __ bind(&done); |
| 2396 | } |
| 2397 | |
| 2398 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2399 | void CallConstructStub::Generate(MacroAssembler* masm) { |
| 2400 | // r0 : number of arguments |
| 2401 | // r1 : the function to call |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2402 | // r2 : feedback vector |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2403 | // r3 : slot in feedback vector (Smi, for RecordCallTarget) |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2404 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2405 | Label non_function; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2406 | // Check that the function is not a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2407 | __ JumpIfSmi(r1, &non_function); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2408 | // Check that the function is a JSFunction. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2409 | __ CompareObjectType(r1, r5, r5, JS_FUNCTION_TYPE); |
| 2410 | __ b(ne, &non_function); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2411 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2412 | GenerateRecordCallTarget(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2413 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2414 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2415 | Label feedback_register_initialized; |
| 2416 | // Put the AllocationSite from the feedback vector into r2, or undefined. |
| 2417 | __ ldr(r2, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
| 2418 | __ ldr(r5, FieldMemOperand(r2, AllocationSite::kMapOffset)); |
| 2419 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 2420 | __ b(eq, &feedback_register_initialized); |
| 2421 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 2422 | __ bind(&feedback_register_initialized); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2423 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2424 | __ AssertUndefinedOrAllocationSite(r2, r5); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2425 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2426 | // Pass function as new target. |
| 2427 | __ mov(r3, r1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2428 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2429 | // Tail call to the function-specific construct stub (still in the caller |
| 2430 | // context at this point). |
| 2431 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 2432 | __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kConstructStubOffset)); |
| 2433 | __ add(pc, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2434 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2435 | __ bind(&non_function); |
| 2436 | __ mov(r3, r1); |
| 2437 | __ Jump(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2438 | } |
| 2439 | |
| 2440 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2441 | void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2442 | // r1 - function |
| 2443 | // r3 - slot id |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2444 | // r2 - vector |
| 2445 | // r4 - allocation site (loaded from vector[slot]) |
| 2446 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 2447 | __ cmp(r1, r5); |
| 2448 | __ b(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2449 | |
| 2450 | __ mov(r0, Operand(arg_count())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2451 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2452 | // Increment the call count for monomorphic function calls. |
| 2453 | __ add(r2, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2454 | __ add(r2, r2, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 2455 | __ ldr(r3, FieldMemOperand(r2, 0)); |
| 2456 | __ add(r3, r3, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement))); |
| 2457 | __ str(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2458 | |
| 2459 | __ mov(r2, r4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2460 | __ mov(r3, r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2461 | ArrayConstructorStub stub(masm->isolate(), arg_count()); |
| 2462 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2463 | } |
| 2464 | |
| 2465 | |
| 2466 | void CallICStub::Generate(MacroAssembler* masm) { |
| 2467 | // r1 - function |
| 2468 | // r3 - slot id (Smi) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2469 | // r2 - vector |
| 2470 | Label extra_checks_or_miss, call, call_function; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2471 | int argc = arg_count(); |
| 2472 | ParameterCount actual(argc); |
| 2473 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2474 | // The checks. First, does r1 match the recorded monomorphic target? |
| 2475 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2476 | __ ldr(r4, FieldMemOperand(r4, FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2477 | |
| 2478 | // We don't know that we have a weak cell. We might have a private symbol |
| 2479 | // or an AllocationSite, but the memory is safe to examine. |
| 2480 | // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to |
| 2481 | // FixedArray. |
| 2482 | // WeakCell::kValueOffset - contains a JSFunction or Smi(0) |
| 2483 | // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not |
| 2484 | // computed, meaning that it can't appear to be a pointer. If the low bit is |
| 2485 | // 0, then hash is computed, but the 0 bit prevents the field from appearing |
| 2486 | // to be a pointer. |
| 2487 | STATIC_ASSERT(WeakCell::kSize >= kPointerSize); |
| 2488 | STATIC_ASSERT(AllocationSite::kTransitionInfoOffset == |
| 2489 | WeakCell::kValueOffset && |
| 2490 | WeakCell::kValueOffset == Symbol::kHashFieldSlot); |
| 2491 | |
| 2492 | __ ldr(r5, FieldMemOperand(r4, WeakCell::kValueOffset)); |
| 2493 | __ cmp(r1, r5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2494 | __ b(ne, &extra_checks_or_miss); |
| 2495 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2496 | // The compare above could have been a SMI/SMI comparison. Guard against this |
| 2497 | // convincing us that we have a monomorphic JSFunction. |
| 2498 | __ JumpIfSmi(r1, &extra_checks_or_miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2499 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2500 | // Increment the call count for monomorphic function calls. |
| 2501 | __ add(r2, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2502 | __ add(r2, r2, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 2503 | __ ldr(r3, FieldMemOperand(r2, 0)); |
| 2504 | __ add(r3, r3, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement))); |
| 2505 | __ str(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2506 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2507 | __ bind(&call_function); |
| 2508 | __ mov(r0, Operand(argc)); |
| 2509 | __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode()), |
| 2510 | RelocInfo::CODE_TARGET); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2511 | |
| 2512 | __ bind(&extra_checks_or_miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2513 | Label uninitialized, miss, not_allocation_site; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2514 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2515 | __ CompareRoot(r4, Heap::kmegamorphic_symbolRootIndex); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2516 | __ b(eq, &call); |
| 2517 | |
| 2518 | // Verify that r4 contains an AllocationSite |
| 2519 | __ ldr(r5, FieldMemOperand(r4, HeapObject::kMapOffset)); |
| 2520 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 2521 | __ b(ne, ¬_allocation_site); |
| 2522 | |
| 2523 | // We have an allocation site. |
| 2524 | HandleArrayCase(masm, &miss); |
| 2525 | |
| 2526 | __ bind(¬_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2527 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2528 | // The following cases attempt to handle MISS cases without going to the |
| 2529 | // runtime. |
| 2530 | if (FLAG_trace_ic) { |
| 2531 | __ jmp(&miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2532 | } |
| 2533 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2534 | __ CompareRoot(r4, Heap::kuninitialized_symbolRootIndex); |
| 2535 | __ b(eq, &uninitialized); |
| 2536 | |
| 2537 | // We are going megamorphic. If the feedback is a JSFunction, it is fine |
| 2538 | // to handle it here. More complex cases are dealt with in the runtime. |
| 2539 | __ AssertNotSmi(r4); |
| 2540 | __ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE); |
| 2541 | __ b(ne, &miss); |
| 2542 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2543 | __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
| 2544 | __ str(ip, FieldMemOperand(r4, FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2545 | |
| 2546 | __ bind(&call); |
| 2547 | __ mov(r0, Operand(argc)); |
| 2548 | __ Jump(masm->isolate()->builtins()->Call(convert_mode()), |
| 2549 | RelocInfo::CODE_TARGET); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2550 | |
| 2551 | __ bind(&uninitialized); |
| 2552 | |
| 2553 | // We are going monomorphic, provided we actually have a JSFunction. |
| 2554 | __ JumpIfSmi(r1, &miss); |
| 2555 | |
| 2556 | // Goto miss case if we do not have a function. |
| 2557 | __ CompareObjectType(r1, r4, r4, JS_FUNCTION_TYPE); |
| 2558 | __ b(ne, &miss); |
| 2559 | |
| 2560 | // Make sure the function is not the Array() function, which requires special |
| 2561 | // behavior on MISS. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2562 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r4); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2563 | __ cmp(r1, r4); |
| 2564 | __ b(eq, &miss); |
| 2565 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2566 | // Make sure the function belongs to the same native context. |
| 2567 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 2568 | __ ldr(r4, ContextMemOperand(r4, Context::NATIVE_CONTEXT_INDEX)); |
| 2569 | __ ldr(ip, NativeContextMemOperand()); |
| 2570 | __ cmp(r4, ip); |
| 2571 | __ b(ne, &miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2572 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2573 | // Initialize the call counter. |
| 2574 | __ Move(r5, Operand(Smi::FromInt(CallICNexus::kCallCountIncrement))); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2575 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2576 | __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + kPointerSize)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2577 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2578 | // Store the function. Use a stub since we need a frame for allocation. |
| 2579 | // r2 - vector |
| 2580 | // r3 - slot |
| 2581 | // r1 - function |
| 2582 | { |
| 2583 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2584 | CreateWeakCellStub create_stub(masm->isolate()); |
| 2585 | __ Push(r1); |
| 2586 | __ CallStub(&create_stub); |
| 2587 | __ Pop(r1); |
| 2588 | } |
| 2589 | |
| 2590 | __ jmp(&call_function); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2591 | |
| 2592 | // We are here because tracing is on or we encountered a MISS case we can't |
| 2593 | // handle here. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2594 | __ bind(&miss); |
| 2595 | GenerateMiss(masm); |
| 2596 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2597 | __ jmp(&call); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2598 | } |
| 2599 | |
| 2600 | |
| 2601 | void CallICStub::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2602 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2603 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2604 | // Push the receiver and the function and feedback info. |
| 2605 | __ Push(r1, r2, r3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2606 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2607 | // Call the entry. |
| 2608 | __ CallRuntime(Runtime::kCallIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2609 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2610 | // Move result to edi and exit the internal frame. |
| 2611 | __ mov(r1, r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2612 | } |
| 2613 | |
| 2614 | |
| 2615 | // StringCharCodeAtGenerator |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2616 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2617 | // If the receiver is a smi trigger the non-string case. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2618 | if (check_mode_ == RECEIVER_IS_UNKNOWN) { |
| 2619 | __ JumpIfSmi(object_, receiver_not_string_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2620 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2621 | // Fetch the instance type of the receiver into result register. |
| 2622 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2623 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 2624 | // If the receiver is not a string trigger the non-string case. |
| 2625 | __ tst(result_, Operand(kIsNotStringMask)); |
| 2626 | __ b(ne, receiver_not_string_); |
| 2627 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2628 | |
| 2629 | // If the index is non-smi trigger the non-smi case. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2630 | __ JumpIfNotSmi(index_, &index_not_smi_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2631 | __ bind(&got_smi_index_); |
| 2632 | |
| 2633 | // Check for index out of range. |
| 2634 | __ ldr(ip, FieldMemOperand(object_, String::kLengthOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2635 | __ cmp(ip, Operand(index_)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2636 | __ b(ls, index_out_of_range_); |
| 2637 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2638 | __ SmiUntag(index_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2639 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2640 | StringCharLoadGenerator::Generate(masm, |
| 2641 | object_, |
| 2642 | index_, |
| 2643 | result_, |
| 2644 | &call_runtime_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2645 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2646 | __ SmiTag(result_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2647 | __ bind(&exit_); |
| 2648 | } |
| 2649 | |
| 2650 | |
| 2651 | void StringCharCodeAtGenerator::GenerateSlow( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2652 | MacroAssembler* masm, EmbedMode embed_mode, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2653 | const RuntimeCallHelper& call_helper) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2654 | __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2655 | |
| 2656 | // Index is not a smi. |
| 2657 | __ bind(&index_not_smi_); |
| 2658 | // If index is a heap number, try converting it to an integer. |
| 2659 | __ CheckMap(index_, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2660 | result_, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2661 | Heap::kHeapNumberMapRootIndex, |
| 2662 | index_not_number_, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2663 | DONT_DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2664 | call_helper.BeforeCall(masm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2665 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2666 | __ Push(LoadWithVectorDescriptor::VectorRegister(), |
| 2667 | LoadWithVectorDescriptor::SlotRegister(), object_, index_); |
| 2668 | } else { |
| 2669 | // index_ is consumed by runtime conversion function. |
| 2670 | __ Push(object_, index_); |
| 2671 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2672 | if (index_flags_ == STRING_INDEX_IS_NUMBER) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2673 | __ CallRuntime(Runtime::kNumberToIntegerMapMinusZero); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2674 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2675 | DCHECK(index_flags_ == STRING_INDEX_IS_ARRAY_INDEX); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2676 | // NumberToSmi discards numbers that are not exact integers. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2677 | __ CallRuntime(Runtime::kNumberToSmi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2678 | } |
| 2679 | // Save the conversion result before the pop instructions below |
| 2680 | // have a chance to overwrite it. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2681 | __ Move(index_, r0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2682 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2683 | __ Pop(LoadWithVectorDescriptor::VectorRegister(), |
| 2684 | LoadWithVectorDescriptor::SlotRegister(), object_); |
| 2685 | } else { |
| 2686 | __ pop(object_); |
| 2687 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2688 | // Reload the instance type. |
| 2689 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2690 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 2691 | call_helper.AfterCall(masm); |
| 2692 | // If index is still not a smi, it must be out of range. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2693 | __ JumpIfNotSmi(index_, index_out_of_range_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2694 | // Otherwise, return to the fast path. |
| 2695 | __ jmp(&got_smi_index_); |
| 2696 | |
| 2697 | // Call runtime. We get here when the receiver is a string and the |
| 2698 | // index is a number, but the code of getting the actual character |
| 2699 | // is too complex (e.g., when the string needs to be flattened). |
| 2700 | __ bind(&call_runtime_); |
| 2701 | call_helper.BeforeCall(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2702 | __ SmiTag(index_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2703 | __ Push(object_, index_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2704 | __ CallRuntime(Runtime::kStringCharCodeAtRT); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2705 | __ Move(result_, r0); |
| 2706 | call_helper.AfterCall(masm); |
| 2707 | __ jmp(&exit_); |
| 2708 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2709 | __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2710 | } |
| 2711 | |
| 2712 | |
| 2713 | // ------------------------------------------------------------------------- |
| 2714 | // StringCharFromCodeGenerator |
| 2715 | |
| 2716 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 2717 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 2718 | STATIC_ASSERT(kSmiTag == 0); |
| 2719 | STATIC_ASSERT(kSmiShiftSize == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2720 | DCHECK(base::bits::IsPowerOfTwo32(String::kMaxOneByteCharCodeU + 1)); |
| 2721 | __ tst(code_, Operand(kSmiTagMask | |
| 2722 | ((~String::kMaxOneByteCharCodeU) << kSmiTagSize))); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2723 | __ b(ne, &slow_case_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2724 | |
| 2725 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2726 | // At this point code register contains smi tagged one-byte char code. |
| 2727 | __ add(result_, result_, Operand::PointerOffsetFromSmiKey(code_)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2728 | __ ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2729 | __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2730 | __ b(eq, &slow_case_); |
| 2731 | __ bind(&exit_); |
| 2732 | } |
| 2733 | |
| 2734 | |
| 2735 | void StringCharFromCodeGenerator::GenerateSlow( |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2736 | MacroAssembler* masm, |
| 2737 | const RuntimeCallHelper& call_helper) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2738 | __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2739 | |
| 2740 | __ bind(&slow_case_); |
| 2741 | call_helper.BeforeCall(masm); |
| 2742 | __ push(code_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2743 | __ CallRuntime(Runtime::kStringCharFromCode); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2744 | __ Move(result_, r0); |
| 2745 | call_helper.AfterCall(masm); |
| 2746 | __ jmp(&exit_); |
| 2747 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2748 | __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2749 | } |
| 2750 | |
| 2751 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2752 | enum CopyCharactersFlags { COPY_ONE_BYTE = 1, DEST_ALWAYS_ALIGNED = 2 }; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2753 | |
| 2754 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2755 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 2756 | Register dest, |
| 2757 | Register src, |
| 2758 | Register count, |
| 2759 | Register scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2760 | String::Encoding encoding) { |
| 2761 | if (FLAG_debug_code) { |
| 2762 | // Check that destination is word aligned. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2763 | __ tst(dest, Operand(kPointerAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2764 | __ Check(eq, kDestinationOfCopyNotAligned); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2765 | } |
| 2766 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2767 | // Assumes word reads and writes are little endian. |
| 2768 | // Nothing to do for zero characters. |
| 2769 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2770 | if (encoding == String::TWO_BYTE_ENCODING) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2771 | __ add(count, count, Operand(count), SetCC); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2772 | } |
| 2773 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2774 | Register limit = count; // Read until dest equals this. |
| 2775 | __ add(limit, dest, Operand(count)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2776 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2777 | Label loop_entry, loop; |
| 2778 | // Copy bytes from src to dest until dest hits limit. |
| 2779 | __ b(&loop_entry); |
| 2780 | __ bind(&loop); |
| 2781 | __ ldrb(scratch, MemOperand(src, 1, PostIndex), lt); |
| 2782 | __ strb(scratch, MemOperand(dest, 1, PostIndex)); |
| 2783 | __ bind(&loop_entry); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2784 | __ cmp(dest, Operand(limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2785 | __ b(lt, &loop); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2786 | |
| 2787 | __ bind(&done); |
| 2788 | } |
| 2789 | |
| 2790 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2791 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 2792 | Label runtime; |
| 2793 | |
| 2794 | // Stack frame on entry. |
| 2795 | // lr: return address |
| 2796 | // sp[0]: to |
| 2797 | // sp[4]: from |
| 2798 | // sp[8]: string |
| 2799 | |
| 2800 | // This stub is called from the native-call %_SubString(...), so |
| 2801 | // nothing can be assumed about the arguments. It is tested that: |
| 2802 | // "string" is a sequential string, |
| 2803 | // both "from" and "to" are smis, and |
| 2804 | // 0 <= from <= to <= string.length. |
| 2805 | // If any of these assumptions fail, we call the runtime system. |
| 2806 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2807 | const int kToOffset = 0 * kPointerSize; |
| 2808 | const int kFromOffset = 1 * kPointerSize; |
| 2809 | const int kStringOffset = 2 * kPointerSize; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2810 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2811 | __ Ldrd(r2, r3, MemOperand(sp, kToOffset)); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2812 | STATIC_ASSERT(kFromOffset == kToOffset + 4); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2813 | STATIC_ASSERT(kSmiTag == 0); |
| 2814 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2815 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2816 | // Arithmetic shift right by one un-smi-tags. In this case we rotate right |
| 2817 | // instead because we bail out on non-smi values: ROR and ASR are equivalent |
| 2818 | // for smis but they set the flags in a way that's easier to optimize. |
| 2819 | __ mov(r2, Operand(r2, ROR, 1), SetCC); |
| 2820 | __ mov(r3, Operand(r3, ROR, 1), SetCC, cc); |
| 2821 | // If either to or from had the smi tag bit set, then C is set now, and N |
| 2822 | // has the same value: we rotated by 1, so the bottom bit is now the top bit. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2823 | // We want to bailout to runtime here if From is negative. In that case, the |
| 2824 | // next instruction is not executed and we fall through to bailing out to |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2825 | // runtime. |
| 2826 | // Executed if both r2 and r3 are untagged integers. |
| 2827 | __ sub(r2, r2, Operand(r3), SetCC, cc); |
| 2828 | // One of the above un-smis or the above SUB could have set N==1. |
| 2829 | __ b(mi, &runtime); // Either "from" or "to" is not an smi, or from > to. |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 2830 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2831 | // Make sure first argument is a string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2832 | __ ldr(r0, MemOperand(sp, kStringOffset)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2833 | __ JumpIfSmi(r0, &runtime); |
| 2834 | Condition is_string = masm->IsObjectStringType(r0, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2835 | __ b(NegateCondition(is_string), &runtime); |
| 2836 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2837 | Label single_char; |
| 2838 | __ cmp(r2, Operand(1)); |
| 2839 | __ b(eq, &single_char); |
| 2840 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2841 | // Short-cut for the case of trivial substring. |
| 2842 | Label return_r0; |
| 2843 | // r0: original string |
| 2844 | // r2: result string length |
| 2845 | __ ldr(r4, FieldMemOperand(r0, String::kLengthOffset)); |
| 2846 | __ cmp(r2, Operand(r4, ASR, 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2847 | // Return original string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2848 | __ b(eq, &return_r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2849 | // Longer than original string's length or negative: unsafe arguments. |
| 2850 | __ b(hi, &runtime); |
| 2851 | // Shorter than original string's length: an actual substring. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2852 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2853 | // Deal with different string types: update the index if necessary |
| 2854 | // and put the underlying string into r5. |
| 2855 | // r0: original string |
| 2856 | // r1: instance type |
| 2857 | // r2: length |
| 2858 | // r3: from index (untagged) |
| 2859 | Label underlying_unpacked, sliced_string, seq_or_external_string; |
| 2860 | // If the string is not indirect, it can only be sequential or external. |
| 2861 | STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| 2862 | STATIC_ASSERT(kIsIndirectStringMask != 0); |
| 2863 | __ tst(r1, Operand(kIsIndirectStringMask)); |
| 2864 | __ b(eq, &seq_or_external_string); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2865 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2866 | __ tst(r1, Operand(kSlicedNotConsMask)); |
| 2867 | __ b(ne, &sliced_string); |
| 2868 | // Cons string. Check whether it is flat, then fetch first part. |
| 2869 | __ ldr(r5, FieldMemOperand(r0, ConsString::kSecondOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2870 | __ CompareRoot(r5, Heap::kempty_stringRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2871 | __ b(ne, &runtime); |
| 2872 | __ ldr(r5, FieldMemOperand(r0, ConsString::kFirstOffset)); |
| 2873 | // Update instance type. |
| 2874 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 2875 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 2876 | __ jmp(&underlying_unpacked); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2877 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2878 | __ bind(&sliced_string); |
| 2879 | // Sliced string. Fetch parent and correct start index by offset. |
| 2880 | __ ldr(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
| 2881 | __ ldr(r4, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
| 2882 | __ add(r3, r3, Operand(r4, ASR, 1)); // Add offset to index. |
| 2883 | // Update instance type. |
| 2884 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 2885 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 2886 | __ jmp(&underlying_unpacked); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2887 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2888 | __ bind(&seq_or_external_string); |
| 2889 | // Sequential or external string. Just move string to the expected register. |
| 2890 | __ mov(r5, r0); |
| 2891 | |
| 2892 | __ bind(&underlying_unpacked); |
| 2893 | |
| 2894 | if (FLAG_string_slices) { |
| 2895 | Label copy_routine; |
| 2896 | // r5: underlying subject string |
| 2897 | // r1: instance type of underlying subject string |
| 2898 | // r2: length |
| 2899 | // r3: adjusted start index (untagged) |
| 2900 | __ cmp(r2, Operand(SlicedString::kMinLength)); |
| 2901 | // Short slice. Copy instead of slicing. |
| 2902 | __ b(lt, ©_routine); |
| 2903 | // Allocate new sliced string. At this point we do not reload the instance |
| 2904 | // type including the string encoding because we simply rely on the info |
| 2905 | // provided by the original string. It does not matter if the original |
| 2906 | // string's encoding is wrong because we always have to recheck encoding of |
| 2907 | // the newly created string's parent anyways due to externalized strings. |
| 2908 | Label two_byte_slice, set_slice_header; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2909 | STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2910 | STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| 2911 | __ tst(r1, Operand(kStringEncodingMask)); |
| 2912 | __ b(eq, &two_byte_slice); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2913 | __ AllocateOneByteSlicedString(r0, r2, r6, r4, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2914 | __ jmp(&set_slice_header); |
| 2915 | __ bind(&two_byte_slice); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2916 | __ AllocateTwoByteSlicedString(r0, r2, r6, r4, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2917 | __ bind(&set_slice_header); |
| 2918 | __ mov(r3, Operand(r3, LSL, 1)); |
| 2919 | __ str(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
| 2920 | __ str(r3, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
| 2921 | __ jmp(&return_r0); |
| 2922 | |
| 2923 | __ bind(©_routine); |
| 2924 | } |
| 2925 | |
| 2926 | // r5: underlying subject string |
| 2927 | // r1: instance type of underlying subject string |
| 2928 | // r2: length |
| 2929 | // r3: adjusted start index (untagged) |
| 2930 | Label two_byte_sequential, sequential_string, allocate_result; |
| 2931 | STATIC_ASSERT(kExternalStringTag != 0); |
| 2932 | STATIC_ASSERT(kSeqStringTag == 0); |
| 2933 | __ tst(r1, Operand(kExternalStringTag)); |
| 2934 | __ b(eq, &sequential_string); |
| 2935 | |
| 2936 | // Handle external string. |
| 2937 | // Rule out short external strings. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2938 | STATIC_ASSERT(kShortExternalStringTag != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2939 | __ tst(r1, Operand(kShortExternalStringTag)); |
| 2940 | __ b(ne, &runtime); |
| 2941 | __ ldr(r5, FieldMemOperand(r5, ExternalString::kResourceDataOffset)); |
| 2942 | // r5 already points to the first character of underlying string. |
| 2943 | __ jmp(&allocate_result); |
| 2944 | |
| 2945 | __ bind(&sequential_string); |
| 2946 | // Locate first character of underlying subject string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2947 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| 2948 | __ add(r5, r5, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2949 | |
| 2950 | __ bind(&allocate_result); |
| 2951 | // Sequential acii string. Allocate the result. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2952 | STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2953 | __ tst(r1, Operand(kStringEncodingMask)); |
| 2954 | __ b(eq, &two_byte_sequential); |
| 2955 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2956 | // Allocate and copy the resulting one-byte string. |
| 2957 | __ AllocateOneByteString(r0, r2, r4, r6, r1, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2958 | |
| 2959 | // Locate first character of substring to copy. |
| 2960 | __ add(r5, r5, r3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2961 | // Locate first character of result. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2962 | __ add(r1, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2963 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2964 | // r0: result string |
| 2965 | // r1: first character of result string |
| 2966 | // r2: result string length |
| 2967 | // r5: first character of substring to copy |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2968 | STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2969 | StringHelper::GenerateCopyCharacters( |
| 2970 | masm, r1, r5, r2, r3, String::ONE_BYTE_ENCODING); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2971 | __ jmp(&return_r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2972 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2973 | // Allocate and copy the resulting two-byte string. |
| 2974 | __ bind(&two_byte_sequential); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2975 | __ AllocateTwoByteString(r0, r2, r4, r6, r1, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2976 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2977 | // Locate first character of substring to copy. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2978 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2979 | __ add(r5, r5, Operand(r3, LSL, 1)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2980 | // Locate first character of result. |
| 2981 | __ add(r1, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2982 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2983 | // r0: result string. |
| 2984 | // r1: first character of result. |
| 2985 | // r2: result length. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2986 | // r5: first character of substring to copy. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2987 | STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2988 | StringHelper::GenerateCopyCharacters( |
| 2989 | masm, r1, r5, r2, r3, String::TWO_BYTE_ENCODING); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2990 | |
| 2991 | __ bind(&return_r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2992 | Counters* counters = isolate()->counters(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2993 | __ IncrementCounter(counters->sub_string_native(), 1, r3, r4); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2994 | __ Drop(3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2995 | __ Ret(); |
| 2996 | |
| 2997 | // Just jump to runtime to create the sub string. |
| 2998 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 2999 | __ TailCallRuntime(Runtime::kSubString); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3000 | |
| 3001 | __ bind(&single_char); |
| 3002 | // r0: original string |
| 3003 | // r1: instance type |
| 3004 | // r2: length |
| 3005 | // r3: from index (untagged) |
| 3006 | __ SmiTag(r3, r3); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3007 | StringCharAtGenerator generator(r0, r3, r2, r0, &runtime, &runtime, &runtime, |
| 3008 | STRING_INDEX_IS_NUMBER, RECEIVER_IS_STRING); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3009 | generator.GenerateFast(masm); |
| 3010 | __ Drop(3); |
| 3011 | __ Ret(); |
| 3012 | generator.SkipSlow(masm, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3013 | } |
| 3014 | |
| 3015 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3016 | void ToNumberStub::Generate(MacroAssembler* masm) { |
| 3017 | // The ToNumber stub takes one argument in r0. |
| 3018 | Label not_smi; |
| 3019 | __ JumpIfNotSmi(r0, ¬_smi); |
| 3020 | __ Ret(); |
| 3021 | __ bind(¬_smi); |
| 3022 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3023 | __ CompareObjectType(r0, r1, r1, HEAP_NUMBER_TYPE); |
| 3024 | // r0: receiver |
| 3025 | // r1: receiver instance type |
| 3026 | __ Ret(eq); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3027 | |
| 3028 | Label not_string, slow_string; |
| 3029 | __ cmp(r1, Operand(FIRST_NONSTRING_TYPE)); |
| 3030 | __ b(hs, ¬_string); |
| 3031 | // Check if string has a cached array index. |
| 3032 | __ ldr(r2, FieldMemOperand(r0, String::kHashFieldOffset)); |
| 3033 | __ tst(r2, Operand(String::kContainsCachedArrayIndexMask)); |
| 3034 | __ b(ne, &slow_string); |
| 3035 | __ IndexFromHash(r2, r0); |
| 3036 | __ Ret(); |
| 3037 | __ bind(&slow_string); |
| 3038 | __ push(r0); // Push argument. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3039 | __ TailCallRuntime(Runtime::kStringToNumber); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3040 | __ bind(¬_string); |
| 3041 | |
| 3042 | Label not_oddball; |
| 3043 | __ cmp(r1, Operand(ODDBALL_TYPE)); |
| 3044 | __ b(ne, ¬_oddball); |
| 3045 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToNumberOffset)); |
| 3046 | __ Ret(); |
| 3047 | __ bind(¬_oddball); |
| 3048 | |
| 3049 | __ push(r0); // Push argument. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3050 | __ TailCallRuntime(Runtime::kToNumber); |
| 3051 | } |
| 3052 | |
| 3053 | |
| 3054 | void ToLengthStub::Generate(MacroAssembler* masm) { |
| 3055 | // The ToLength stub takes one argument in r0. |
| 3056 | Label not_smi; |
| 3057 | __ JumpIfNotSmi(r0, ¬_smi); |
| 3058 | STATIC_ASSERT(kSmiTag == 0); |
| 3059 | __ tst(r0, r0); |
| 3060 | __ mov(r0, Operand(0), LeaveCC, lt); |
| 3061 | __ Ret(); |
| 3062 | __ bind(¬_smi); |
| 3063 | |
| 3064 | __ push(r0); // Push argument. |
| 3065 | __ TailCallRuntime(Runtime::kToLength); |
| 3066 | } |
| 3067 | |
| 3068 | |
| 3069 | void ToStringStub::Generate(MacroAssembler* masm) { |
| 3070 | // The ToString stub takes one argument in r0. |
| 3071 | Label is_number; |
| 3072 | __ JumpIfSmi(r0, &is_number); |
| 3073 | |
| 3074 | __ CompareObjectType(r0, r1, r1, FIRST_NONSTRING_TYPE); |
| 3075 | // r0: receiver |
| 3076 | // r1: receiver instance type |
| 3077 | __ Ret(lo); |
| 3078 | |
| 3079 | Label not_heap_number; |
| 3080 | __ cmp(r1, Operand(HEAP_NUMBER_TYPE)); |
| 3081 | __ b(ne, ¬_heap_number); |
| 3082 | __ bind(&is_number); |
| 3083 | NumberToStringStub stub(isolate()); |
| 3084 | __ TailCallStub(&stub); |
| 3085 | __ bind(¬_heap_number); |
| 3086 | |
| 3087 | Label not_oddball; |
| 3088 | __ cmp(r1, Operand(ODDBALL_TYPE)); |
| 3089 | __ b(ne, ¬_oddball); |
| 3090 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToStringOffset)); |
| 3091 | __ Ret(); |
| 3092 | __ bind(¬_oddball); |
| 3093 | |
| 3094 | __ push(r0); // Push argument. |
| 3095 | __ TailCallRuntime(Runtime::kToString); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 3096 | } |
| 3097 | |
| 3098 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3099 | void StringHelper::GenerateFlatOneByteStringEquals( |
| 3100 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 3101 | Register scratch2, Register scratch3) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3102 | Register length = scratch1; |
| 3103 | |
| 3104 | // Compare lengths. |
| 3105 | Label strings_not_equal, check_zero_length; |
| 3106 | __ ldr(length, FieldMemOperand(left, String::kLengthOffset)); |
| 3107 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 3108 | __ cmp(length, scratch2); |
| 3109 | __ b(eq, &check_zero_length); |
| 3110 | __ bind(&strings_not_equal); |
| 3111 | __ mov(r0, Operand(Smi::FromInt(NOT_EQUAL))); |
| 3112 | __ Ret(); |
| 3113 | |
| 3114 | // Check if the length is zero. |
| 3115 | Label compare_chars; |
| 3116 | __ bind(&check_zero_length); |
| 3117 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3118 | __ cmp(length, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3119 | __ b(ne, &compare_chars); |
| 3120 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 3121 | __ Ret(); |
| 3122 | |
| 3123 | // Compare characters. |
| 3124 | __ bind(&compare_chars); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3125 | GenerateOneByteCharsCompareLoop(masm, left, right, length, scratch2, scratch3, |
| 3126 | &strings_not_equal); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3127 | |
| 3128 | // Characters are equal. |
| 3129 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 3130 | __ Ret(); |
| 3131 | } |
| 3132 | |
| 3133 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3134 | void StringHelper::GenerateCompareFlatOneByteStrings( |
| 3135 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 3136 | Register scratch2, Register scratch3, Register scratch4) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3137 | Label result_not_equal, compare_lengths; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3138 | // Find minimum length and length difference. |
| 3139 | __ ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 3140 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 3141 | __ sub(scratch3, scratch1, Operand(scratch2), SetCC); |
| 3142 | Register length_delta = scratch3; |
| 3143 | __ mov(scratch1, scratch2, LeaveCC, gt); |
| 3144 | Register min_length = scratch1; |
| 3145 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3146 | __ cmp(min_length, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3147 | __ b(eq, &compare_lengths); |
| 3148 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3149 | // Compare loop. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3150 | GenerateOneByteCharsCompareLoop(masm, left, right, min_length, scratch2, |
| 3151 | scratch4, &result_not_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3152 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3153 | // Compare lengths - strings up to min-length are equal. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3154 | __ bind(&compare_lengths); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3155 | DCHECK(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3156 | // Use length_delta as result if it's zero. |
| 3157 | __ mov(r0, Operand(length_delta), SetCC); |
| 3158 | __ bind(&result_not_equal); |
| 3159 | // Conditionally update the result based either on length_delta or |
| 3160 | // the last comparion performed in the loop above. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3161 | __ mov(r0, Operand(Smi::FromInt(GREATER)), LeaveCC, gt); |
| 3162 | __ mov(r0, Operand(Smi::FromInt(LESS)), LeaveCC, lt); |
| 3163 | __ Ret(); |
| 3164 | } |
| 3165 | |
| 3166 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3167 | void StringHelper::GenerateOneByteCharsCompareLoop( |
| 3168 | MacroAssembler* masm, Register left, Register right, Register length, |
| 3169 | Register scratch1, Register scratch2, Label* chars_not_equal) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3170 | // Change index to run from -length to -1 by adding length to string |
| 3171 | // start. This means that loop ends when index reaches zero, which |
| 3172 | // doesn't need an additional compare. |
| 3173 | __ SmiUntag(length); |
| 3174 | __ add(scratch1, length, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3175 | Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3176 | __ add(left, left, Operand(scratch1)); |
| 3177 | __ add(right, right, Operand(scratch1)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3178 | __ rsb(length, length, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3179 | Register index = length; // index = -length; |
| 3180 | |
| 3181 | // Compare loop. |
| 3182 | Label loop; |
| 3183 | __ bind(&loop); |
| 3184 | __ ldrb(scratch1, MemOperand(left, index)); |
| 3185 | __ ldrb(scratch2, MemOperand(right, index)); |
| 3186 | __ cmp(scratch1, scratch2); |
| 3187 | __ b(ne, chars_not_equal); |
| 3188 | __ add(index, index, Operand(1), SetCC); |
| 3189 | __ b(ne, &loop); |
| 3190 | } |
| 3191 | |
| 3192 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3193 | void StringCompareStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3194 | // ----------- S t a t e ------------- |
| 3195 | // -- r1 : left |
| 3196 | // -- r0 : right |
| 3197 | // -- lr : return address |
| 3198 | // ----------------------------------- |
| 3199 | __ AssertString(r1); |
| 3200 | __ AssertString(r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3201 | |
| 3202 | Label not_same; |
| 3203 | __ cmp(r0, r1); |
| 3204 | __ b(ne, ¬_same); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3205 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3206 | __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, r1, |
| 3207 | r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3208 | __ Ret(); |
| 3209 | |
| 3210 | __ bind(¬_same); |
| 3211 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3212 | // Check that both objects are sequential one-byte strings. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3213 | Label runtime; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3214 | __ JumpIfNotBothSequentialOneByteStrings(r1, r0, r2, r3, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3215 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3216 | // Compare flat one-byte strings natively. |
| 3217 | __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, r2, |
| 3218 | r3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3219 | StringHelper::GenerateCompareFlatOneByteStrings(masm, r1, r0, r2, r3, r4, r5); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3220 | |
| 3221 | // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
| 3222 | // tagged as a small integer. |
| 3223 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3224 | __ Push(r1, r0); |
| 3225 | __ TailCallRuntime(Runtime::kStringCompare); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3226 | } |
| 3227 | |
| 3228 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3229 | void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
| 3230 | // ----------- S t a t e ------------- |
| 3231 | // -- r1 : left |
| 3232 | // -- r0 : right |
| 3233 | // -- lr : return address |
| 3234 | // ----------------------------------- |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3235 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3236 | // Load r2 with the allocation site. We stick an undefined dummy value here |
| 3237 | // and replace it with the real allocation site later when we instantiate this |
| 3238 | // stub in BinaryOpICWithAllocationSiteStub::GetCodeCopyFromTemplate(). |
| 3239 | __ Move(r2, handle(isolate()->heap()->undefined_value())); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 3240 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3241 | // Make sure that we actually patched the allocation site. |
| 3242 | if (FLAG_debug_code) { |
| 3243 | __ tst(r2, Operand(kSmiTagMask)); |
| 3244 | __ Assert(ne, kExpectedAllocationSite); |
| 3245 | __ push(r2); |
| 3246 | __ ldr(r2, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 3247 | __ LoadRoot(ip, Heap::kAllocationSiteMapRootIndex); |
| 3248 | __ cmp(r2, ip); |
| 3249 | __ pop(r2); |
| 3250 | __ Assert(eq, kExpectedAllocationSite); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 3251 | } |
| 3252 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3253 | // Tail call into the stub that handles binary operations with allocation |
| 3254 | // sites. |
| 3255 | BinaryOpWithAllocationSiteStub stub(isolate(), state()); |
| 3256 | __ TailCallStub(&stub); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3257 | } |
| 3258 | |
| 3259 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3260 | void CompareICStub::GenerateBooleans(MacroAssembler* masm) { |
| 3261 | DCHECK_EQ(CompareICState::BOOLEAN, state()); |
| 3262 | Label miss; |
| 3263 | |
| 3264 | __ CheckMap(r1, r2, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| 3265 | __ CheckMap(r0, r3, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| 3266 | if (op() != Token::EQ_STRICT && is_strong(strength())) { |
| 3267 | __ TailCallRuntime(Runtime::kThrowStrongModeImplicitConversion); |
| 3268 | } else { |
| 3269 | if (!Token::IsEqualityOp(op())) { |
| 3270 | __ ldr(r1, FieldMemOperand(r1, Oddball::kToNumberOffset)); |
| 3271 | __ AssertSmi(r1); |
| 3272 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToNumberOffset)); |
| 3273 | __ AssertSmi(r0); |
| 3274 | } |
| 3275 | __ sub(r0, r1, r0); |
| 3276 | __ Ret(); |
| 3277 | } |
| 3278 | |
| 3279 | __ bind(&miss); |
| 3280 | GenerateMiss(masm); |
| 3281 | } |
| 3282 | |
| 3283 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3284 | void CompareICStub::GenerateSmis(MacroAssembler* masm) { |
| 3285 | DCHECK(state() == CompareICState::SMI); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3286 | Label miss; |
| 3287 | __ orr(r2, r1, r0); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 3288 | __ JumpIfNotSmi(r2, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3289 | |
| 3290 | if (GetCondition() == eq) { |
| 3291 | // For equality we do not care about the sign of the result. |
| 3292 | __ sub(r0, r0, r1, SetCC); |
| 3293 | } else { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3294 | // Untag before subtracting to avoid handling overflow. |
| 3295 | __ SmiUntag(r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3296 | __ sub(r0, r1, Operand::SmiUntag(r0)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3297 | } |
| 3298 | __ Ret(); |
| 3299 | |
| 3300 | __ bind(&miss); |
| 3301 | GenerateMiss(masm); |
| 3302 | } |
| 3303 | |
| 3304 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3305 | void CompareICStub::GenerateNumbers(MacroAssembler* masm) { |
| 3306 | DCHECK(state() == CompareICState::NUMBER); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3307 | |
| 3308 | Label generic_stub; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3309 | Label unordered, maybe_undefined1, maybe_undefined2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3310 | Label miss; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3311 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3312 | if (left() == CompareICState::SMI) { |
| 3313 | __ JumpIfNotSmi(r1, &miss); |
| 3314 | } |
| 3315 | if (right() == CompareICState::SMI) { |
| 3316 | __ JumpIfNotSmi(r0, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3317 | } |
| 3318 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3319 | // Inlining the double comparison and falling back to the general compare |
| 3320 | // stub if NaN is involved. |
| 3321 | // Load left and right operand. |
| 3322 | Label done, left, left_smi, right_smi; |
| 3323 | __ JumpIfSmi(r0, &right_smi); |
| 3324 | __ CheckMap(r0, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined1, |
| 3325 | DONT_DO_SMI_CHECK); |
| 3326 | __ sub(r2, r0, Operand(kHeapObjectTag)); |
| 3327 | __ vldr(d1, r2, HeapNumber::kValueOffset); |
| 3328 | __ b(&left); |
| 3329 | __ bind(&right_smi); |
| 3330 | __ SmiToDouble(d1, r0); |
| 3331 | |
| 3332 | __ bind(&left); |
| 3333 | __ JumpIfSmi(r1, &left_smi); |
| 3334 | __ CheckMap(r1, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined2, |
| 3335 | DONT_DO_SMI_CHECK); |
| 3336 | __ sub(r2, r1, Operand(kHeapObjectTag)); |
| 3337 | __ vldr(d0, r2, HeapNumber::kValueOffset); |
| 3338 | __ b(&done); |
| 3339 | __ bind(&left_smi); |
| 3340 | __ SmiToDouble(d0, r1); |
| 3341 | |
| 3342 | __ bind(&done); |
| 3343 | // Compare operands. |
| 3344 | __ VFPCompareAndSetFlags(d0, d1); |
| 3345 | |
| 3346 | // Don't base result on status bits when a NaN is involved. |
| 3347 | __ b(vs, &unordered); |
| 3348 | |
| 3349 | // Return a result of -1, 0, or 1, based on status bits. |
| 3350 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 3351 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 3352 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 3353 | __ Ret(); |
| 3354 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3355 | __ bind(&unordered); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3356 | __ bind(&generic_stub); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3357 | CompareICStub stub(isolate(), op(), strength(), CompareICState::GENERIC, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3358 | CompareICState::GENERIC, CompareICState::GENERIC); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3359 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 3360 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3361 | __ bind(&maybe_undefined1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3362 | if (Token::IsOrderedRelationalCompareOp(op())) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3363 | __ CompareRoot(r0, Heap::kUndefinedValueRootIndex); |
| 3364 | __ b(ne, &miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3365 | __ JumpIfSmi(r1, &unordered); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3366 | __ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE); |
| 3367 | __ b(ne, &maybe_undefined2); |
| 3368 | __ jmp(&unordered); |
| 3369 | } |
| 3370 | |
| 3371 | __ bind(&maybe_undefined2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3372 | if (Token::IsOrderedRelationalCompareOp(op())) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3373 | __ CompareRoot(r1, Heap::kUndefinedValueRootIndex); |
| 3374 | __ b(eq, &unordered); |
| 3375 | } |
| 3376 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3377 | __ bind(&miss); |
| 3378 | GenerateMiss(masm); |
| 3379 | } |
| 3380 | |
| 3381 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3382 | void CompareICStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| 3383 | DCHECK(state() == CompareICState::INTERNALIZED_STRING); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3384 | Label miss; |
| 3385 | |
| 3386 | // Registers containing left and right operands respectively. |
| 3387 | Register left = r1; |
| 3388 | Register right = r0; |
| 3389 | Register tmp1 = r2; |
| 3390 | Register tmp2 = r3; |
| 3391 | |
| 3392 | // Check that both operands are heap objects. |
| 3393 | __ JumpIfEitherSmi(left, right, &miss); |
| 3394 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3395 | // Check that both operands are internalized strings. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3396 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 3397 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 3398 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 3399 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3400 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 3401 | __ orr(tmp1, tmp1, Operand(tmp2)); |
| 3402 | __ tst(tmp1, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 3403 | __ b(ne, &miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3404 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3405 | // Internalized strings are compared by identity. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3406 | __ cmp(left, right); |
| 3407 | // Make sure r0 is non-zero. At this point input operands are |
| 3408 | // guaranteed to be non-zero. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3409 | DCHECK(right.is(r0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3410 | STATIC_ASSERT(EQUAL == 0); |
| 3411 | STATIC_ASSERT(kSmiTag == 0); |
| 3412 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 3413 | __ Ret(); |
| 3414 | |
| 3415 | __ bind(&miss); |
| 3416 | GenerateMiss(masm); |
| 3417 | } |
| 3418 | |
| 3419 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3420 | void CompareICStub::GenerateUniqueNames(MacroAssembler* masm) { |
| 3421 | DCHECK(state() == CompareICState::UNIQUE_NAME); |
| 3422 | DCHECK(GetCondition() == eq); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3423 | Label miss; |
| 3424 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3425 | // Registers containing left and right operands respectively. |
| 3426 | Register left = r1; |
| 3427 | Register right = r0; |
| 3428 | Register tmp1 = r2; |
| 3429 | Register tmp2 = r3; |
| 3430 | |
| 3431 | // Check that both operands are heap objects. |
| 3432 | __ JumpIfEitherSmi(left, right, &miss); |
| 3433 | |
| 3434 | // Check that both operands are unique names. This leaves the instance |
| 3435 | // types loaded in tmp1 and tmp2. |
| 3436 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 3437 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 3438 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 3439 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 3440 | |
| 3441 | __ JumpIfNotUniqueNameInstanceType(tmp1, &miss); |
| 3442 | __ JumpIfNotUniqueNameInstanceType(tmp2, &miss); |
| 3443 | |
| 3444 | // Unique names are compared by identity. |
| 3445 | __ cmp(left, right); |
| 3446 | // Make sure r0 is non-zero. At this point input operands are |
| 3447 | // guaranteed to be non-zero. |
| 3448 | DCHECK(right.is(r0)); |
| 3449 | STATIC_ASSERT(EQUAL == 0); |
| 3450 | STATIC_ASSERT(kSmiTag == 0); |
| 3451 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 3452 | __ Ret(); |
| 3453 | |
| 3454 | __ bind(&miss); |
| 3455 | GenerateMiss(masm); |
| 3456 | } |
| 3457 | |
| 3458 | |
| 3459 | void CompareICStub::GenerateStrings(MacroAssembler* masm) { |
| 3460 | DCHECK(state() == CompareICState::STRING); |
| 3461 | Label miss; |
| 3462 | |
| 3463 | bool equality = Token::IsEqualityOp(op()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3464 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3465 | // Registers containing left and right operands respectively. |
| 3466 | Register left = r1; |
| 3467 | Register right = r0; |
| 3468 | Register tmp1 = r2; |
| 3469 | Register tmp2 = r3; |
| 3470 | Register tmp3 = r4; |
| 3471 | Register tmp4 = r5; |
| 3472 | |
| 3473 | // Check that both operands are heap objects. |
| 3474 | __ JumpIfEitherSmi(left, right, &miss); |
| 3475 | |
| 3476 | // Check that both operands are strings. This leaves the instance |
| 3477 | // types loaded in tmp1 and tmp2. |
| 3478 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 3479 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 3480 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 3481 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 3482 | STATIC_ASSERT(kNotStringTag != 0); |
| 3483 | __ orr(tmp3, tmp1, tmp2); |
| 3484 | __ tst(tmp3, Operand(kIsNotStringMask)); |
| 3485 | __ b(ne, &miss); |
| 3486 | |
| 3487 | // Fast check for identical strings. |
| 3488 | __ cmp(left, right); |
| 3489 | STATIC_ASSERT(EQUAL == 0); |
| 3490 | STATIC_ASSERT(kSmiTag == 0); |
| 3491 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 3492 | __ Ret(eq); |
| 3493 | |
| 3494 | // Handle not identical strings. |
| 3495 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3496 | // Check that both strings are internalized strings. If they are, we're done |
| 3497 | // because we already know they are not identical. We know they are both |
| 3498 | // strings. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3499 | if (equality) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3500 | DCHECK(GetCondition() == eq); |
| 3501 | STATIC_ASSERT(kInternalizedTag == 0); |
| 3502 | __ orr(tmp3, tmp1, Operand(tmp2)); |
| 3503 | __ tst(tmp3, Operand(kIsNotInternalizedMask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3504 | // Make sure r0 is non-zero. At this point input operands are |
| 3505 | // guaranteed to be non-zero. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3506 | DCHECK(right.is(r0)); |
| 3507 | __ Ret(eq); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3508 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3509 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3510 | // Check that both strings are sequential one-byte. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3511 | Label runtime; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3512 | __ JumpIfBothInstanceTypesAreNotSequentialOneByte(tmp1, tmp2, tmp3, tmp4, |
| 3513 | &runtime); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3514 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3515 | // Compare flat one-byte strings. Returns when done. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3516 | if (equality) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3517 | StringHelper::GenerateFlatOneByteStringEquals(masm, left, right, tmp1, tmp2, |
| 3518 | tmp3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3519 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3520 | StringHelper::GenerateCompareFlatOneByteStrings(masm, left, right, tmp1, |
| 3521 | tmp2, tmp3, tmp4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3522 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3523 | |
| 3524 | // Handle more complex cases in runtime. |
| 3525 | __ bind(&runtime); |
| 3526 | __ Push(left, right); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3527 | if (equality) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3528 | __ TailCallRuntime(Runtime::kStringEquals); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3529 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3530 | __ TailCallRuntime(Runtime::kStringCompare); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3531 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3532 | |
| 3533 | __ bind(&miss); |
| 3534 | GenerateMiss(masm); |
| 3535 | } |
| 3536 | |
| 3537 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3538 | void CompareICStub::GenerateReceivers(MacroAssembler* masm) { |
| 3539 | DCHECK_EQ(CompareICState::RECEIVER, state()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3540 | Label miss; |
| 3541 | __ and_(r2, r1, Operand(r0)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 3542 | __ JumpIfSmi(r2, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3543 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3544 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 3545 | __ CompareObjectType(r0, r2, r2, FIRST_JS_RECEIVER_TYPE); |
| 3546 | __ b(lt, &miss); |
| 3547 | __ CompareObjectType(r1, r2, r2, FIRST_JS_RECEIVER_TYPE); |
| 3548 | __ b(lt, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3549 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3550 | DCHECK(GetCondition() == eq); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3551 | __ sub(r0, r0, Operand(r1)); |
| 3552 | __ Ret(); |
| 3553 | |
| 3554 | __ bind(&miss); |
| 3555 | GenerateMiss(masm); |
| 3556 | } |
| 3557 | |
| 3558 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3559 | void CompareICStub::GenerateKnownReceivers(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3560 | Label miss; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3561 | Handle<WeakCell> cell = Map::WeakCellForMap(known_map_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3562 | __ and_(r2, r1, Operand(r0)); |
| 3563 | __ JumpIfSmi(r2, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3564 | __ GetWeakValue(r4, cell); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3565 | __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 3566 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3567 | __ cmp(r2, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3568 | __ b(ne, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3569 | __ cmp(r3, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3570 | __ b(ne, &miss); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 3571 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3572 | if (Token::IsEqualityOp(op())) { |
| 3573 | __ sub(r0, r0, Operand(r1)); |
| 3574 | __ Ret(); |
| 3575 | } else if (is_strong(strength())) { |
| 3576 | __ TailCallRuntime(Runtime::kThrowStrongModeImplicitConversion); |
| 3577 | } else { |
| 3578 | if (op() == Token::LT || op() == Token::LTE) { |
| 3579 | __ mov(r2, Operand(Smi::FromInt(GREATER))); |
| 3580 | } else { |
| 3581 | __ mov(r2, Operand(Smi::FromInt(LESS))); |
| 3582 | } |
| 3583 | __ Push(r1, r0, r2); |
| 3584 | __ TailCallRuntime(Runtime::kCompare); |
| 3585 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3586 | |
| 3587 | __ bind(&miss); |
| 3588 | GenerateMiss(masm); |
| 3589 | } |
| 3590 | |
| 3591 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3592 | void CompareICStub::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3593 | { |
| 3594 | // Call the runtime system in a fresh internal frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3595 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3596 | __ Push(r1, r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3597 | __ Push(lr, r1, r0); |
| 3598 | __ mov(ip, Operand(Smi::FromInt(op()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3599 | __ push(ip); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3600 | __ CallRuntime(Runtime::kCompareIC_Miss); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3601 | // Compute the entry point of the rewritten stub. |
| 3602 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3603 | // Restore registers. |
| 3604 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3605 | __ Pop(r1, r0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3606 | } |
| 3607 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3608 | __ Jump(r2); |
| 3609 | } |
| 3610 | |
| 3611 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3612 | void DirectCEntryStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3613 | // Place the return address on the stack, making the call |
| 3614 | // GC safe. The RegExp backend also relies on this. |
| 3615 | __ str(lr, MemOperand(sp, 0)); |
| 3616 | __ blx(ip); // Call the C++ function. |
| 3617 | __ VFPEnsureFPSCRState(r2); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3618 | __ ldr(pc, MemOperand(sp, 0)); |
| 3619 | } |
| 3620 | |
| 3621 | |
| 3622 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3623 | Register target) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3624 | intptr_t code = |
| 3625 | reinterpret_cast<intptr_t>(GetCode().location()); |
| 3626 | __ Move(ip, target); |
| 3627 | __ mov(lr, Operand(code, RelocInfo::CODE_TARGET)); |
| 3628 | __ blx(lr); // Call the stub. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3629 | } |
| 3630 | |
| 3631 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3632 | void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| 3633 | Label* miss, |
| 3634 | Label* done, |
| 3635 | Register receiver, |
| 3636 | Register properties, |
| 3637 | Handle<Name> name, |
| 3638 | Register scratch0) { |
| 3639 | DCHECK(name->IsUniqueName()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3640 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 3641 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 3642 | // undefined value), it guarantees the hash table doesn't contain the |
| 3643 | // property. It's true even if some slots represent deleted properties |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3644 | // (their names are the hole value). |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3645 | for (int i = 0; i < kInlinedProbes; i++) { |
| 3646 | // scratch0 points to properties hash. |
| 3647 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3648 | Register index = scratch0; |
| 3649 | // Capacity is smi 2^n. |
| 3650 | __ ldr(index, FieldMemOperand(properties, kCapacityOffset)); |
| 3651 | __ sub(index, index, Operand(1)); |
| 3652 | __ and_(index, index, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3653 | Smi::FromInt(name->Hash() + NameDictionary::GetProbeOffset(i)))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3654 | |
| 3655 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3656 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3657 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 3658 | |
| 3659 | Register entity_name = scratch0; |
| 3660 | // Having undefined at this place means the name is not contained. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3661 | STATIC_ASSERT(kSmiTagSize == 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3662 | Register tmp = properties; |
| 3663 | __ add(tmp, properties, Operand(index, LSL, 1)); |
| 3664 | __ ldr(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| 3665 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3666 | DCHECK(!tmp.is(entity_name)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3667 | __ LoadRoot(tmp, Heap::kUndefinedValueRootIndex); |
| 3668 | __ cmp(entity_name, tmp); |
| 3669 | __ b(eq, done); |
| 3670 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3671 | // Load the hole ready for use below: |
| 3672 | __ LoadRoot(tmp, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3673 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3674 | // Stop if found the property. |
| 3675 | __ cmp(entity_name, Operand(Handle<Name>(name))); |
| 3676 | __ b(eq, miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3677 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3678 | Label good; |
| 3679 | __ cmp(entity_name, tmp); |
| 3680 | __ b(eq, &good); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3681 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3682 | // Check if the entry name is not a unique name. |
| 3683 | __ ldr(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| 3684 | __ ldrb(entity_name, |
| 3685 | FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| 3686 | __ JumpIfNotUniqueNameInstanceType(entity_name, miss); |
| 3687 | __ bind(&good); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3688 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3689 | // Restore the properties. |
| 3690 | __ ldr(properties, |
| 3691 | FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3692 | } |
| 3693 | |
| 3694 | const int spill_mask = |
| 3695 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | r3.bit() | |
| 3696 | r2.bit() | r1.bit() | r0.bit()); |
| 3697 | |
| 3698 | __ stm(db_w, sp, spill_mask); |
| 3699 | __ ldr(r0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3700 | __ mov(r1, Operand(Handle<Name>(name))); |
| 3701 | NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3702 | __ CallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3703 | __ cmp(r0, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3704 | __ ldm(ia_w, sp, spill_mask); |
| 3705 | |
| 3706 | __ b(eq, done); |
| 3707 | __ b(ne, miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3708 | } |
| 3709 | |
| 3710 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3711 | // Probe the name dictionary in the |elements| register. Jump to the |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3712 | // |done| label if a property with the given name is found. Jump to |
| 3713 | // the |miss| label otherwise. |
| 3714 | // If lookup was successful |scratch2| will be equal to elements + 4 * index. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3715 | void NameDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 3716 | Label* miss, |
| 3717 | Label* done, |
| 3718 | Register elements, |
| 3719 | Register name, |
| 3720 | Register scratch1, |
| 3721 | Register scratch2) { |
| 3722 | DCHECK(!elements.is(scratch1)); |
| 3723 | DCHECK(!elements.is(scratch2)); |
| 3724 | DCHECK(!name.is(scratch1)); |
| 3725 | DCHECK(!name.is(scratch2)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3726 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3727 | __ AssertName(name); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3728 | |
| 3729 | // Compute the capacity mask. |
| 3730 | __ ldr(scratch1, FieldMemOperand(elements, kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3731 | __ SmiUntag(scratch1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3732 | __ sub(scratch1, scratch1, Operand(1)); |
| 3733 | |
| 3734 | // Generate an unrolled loop that performs a few probes before |
| 3735 | // giving up. Measurements done on Gmail indicate that 2 probes |
| 3736 | // cover ~93% of loads from dictionaries. |
| 3737 | for (int i = 0; i < kInlinedProbes; i++) { |
| 3738 | // Compute the masked index: (hash + i + i * i) & mask. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3739 | __ ldr(scratch2, FieldMemOperand(name, Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3740 | if (i > 0) { |
| 3741 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 3742 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 3743 | // shifted in the following and instruction. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3744 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 3745 | 1 << (32 - Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3746 | __ add(scratch2, scratch2, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3747 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3748 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3749 | __ and_(scratch2, scratch1, Operand(scratch2, LSR, Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3750 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3751 | // Scale the index by multiplying by the entry size. |
| 3752 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3753 | // scratch2 = scratch2 * 3. |
| 3754 | __ add(scratch2, scratch2, Operand(scratch2, LSL, 1)); |
| 3755 | |
| 3756 | // Check if the key is identical to the name. |
| 3757 | __ add(scratch2, elements, Operand(scratch2, LSL, 2)); |
| 3758 | __ ldr(ip, FieldMemOperand(scratch2, kElementsStartOffset)); |
| 3759 | __ cmp(name, Operand(ip)); |
| 3760 | __ b(eq, done); |
| 3761 | } |
| 3762 | |
| 3763 | const int spill_mask = |
| 3764 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | |
| 3765 | r3.bit() | r2.bit() | r1.bit() | r0.bit()) & |
| 3766 | ~(scratch1.bit() | scratch2.bit()); |
| 3767 | |
| 3768 | __ stm(db_w, sp, spill_mask); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3769 | if (name.is(r0)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3770 | DCHECK(!elements.is(r1)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3771 | __ Move(r1, name); |
| 3772 | __ Move(r0, elements); |
| 3773 | } else { |
| 3774 | __ Move(r0, elements); |
| 3775 | __ Move(r1, name); |
| 3776 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3777 | NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3778 | __ CallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3779 | __ cmp(r0, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3780 | __ mov(scratch2, Operand(r2)); |
| 3781 | __ ldm(ia_w, sp, spill_mask); |
| 3782 | |
| 3783 | __ b(ne, done); |
| 3784 | __ b(eq, miss); |
| 3785 | } |
| 3786 | |
| 3787 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3788 | void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3789 | // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| 3790 | // we cannot call anything that could cause a GC from this stub. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3791 | // Registers: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3792 | // result: NameDictionary to probe |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3793 | // r1: key |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3794 | // dictionary: NameDictionary to probe. |
| 3795 | // index: will hold an index of entry if lookup is successful. |
| 3796 | // might alias with result_. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3797 | // Returns: |
| 3798 | // result_ is zero if lookup failed, non zero otherwise. |
| 3799 | |
| 3800 | Register result = r0; |
| 3801 | Register dictionary = r0; |
| 3802 | Register key = r1; |
| 3803 | Register index = r2; |
| 3804 | Register mask = r3; |
| 3805 | Register hash = r4; |
| 3806 | Register undefined = r5; |
| 3807 | Register entry_key = r6; |
| 3808 | |
| 3809 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 3810 | |
| 3811 | __ ldr(mask, FieldMemOperand(dictionary, kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3812 | __ SmiUntag(mask); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3813 | __ sub(mask, mask, Operand(1)); |
| 3814 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3815 | __ ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3816 | |
| 3817 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 3818 | |
| 3819 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 3820 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3821 | // Capacity is smi 2^n. |
| 3822 | if (i > 0) { |
| 3823 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 3824 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 3825 | // shifted in the following and instruction. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3826 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 3827 | 1 << (32 - Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3828 | __ add(index, hash, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3829 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3830 | } else { |
| 3831 | __ mov(index, Operand(hash)); |
| 3832 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3833 | __ and_(index, mask, Operand(index, LSR, Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3834 | |
| 3835 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3836 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3837 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 3838 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 3839 | STATIC_ASSERT(kSmiTagSize == 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3840 | __ add(index, dictionary, Operand(index, LSL, 2)); |
| 3841 | __ ldr(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| 3842 | |
| 3843 | // Having undefined at this place means the name is not contained. |
| 3844 | __ cmp(entry_key, Operand(undefined)); |
| 3845 | __ b(eq, ¬_in_dictionary); |
| 3846 | |
| 3847 | // Stop if found the property. |
| 3848 | __ cmp(entry_key, Operand(key)); |
| 3849 | __ b(eq, &in_dictionary); |
| 3850 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3851 | if (i != kTotalProbes - 1 && mode() == NEGATIVE_LOOKUP) { |
| 3852 | // Check if the entry name is not a unique name. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3853 | __ ldr(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| 3854 | __ ldrb(entry_key, |
| 3855 | FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3856 | __ JumpIfNotUniqueNameInstanceType(entry_key, &maybe_in_dictionary); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3857 | } |
| 3858 | } |
| 3859 | |
| 3860 | __ bind(&maybe_in_dictionary); |
| 3861 | // If we are doing negative lookup then probing failure should be |
| 3862 | // treated as a lookup success. For positive lookup probing failure |
| 3863 | // should be treated as lookup failure. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3864 | if (mode() == POSITIVE_LOOKUP) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3865 | __ mov(result, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3866 | __ Ret(); |
| 3867 | } |
| 3868 | |
| 3869 | __ bind(&in_dictionary); |
| 3870 | __ mov(result, Operand(1)); |
| 3871 | __ Ret(); |
| 3872 | |
| 3873 | __ bind(¬_in_dictionary); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3874 | __ mov(result, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3875 | __ Ret(); |
| 3876 | } |
| 3877 | |
| 3878 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3879 | void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| 3880 | Isolate* isolate) { |
| 3881 | StoreBufferOverflowStub stub1(isolate, kDontSaveFPRegs); |
| 3882 | stub1.GetCode(); |
| 3883 | // Hydrogen code stubs need stub2 at snapshot time. |
| 3884 | StoreBufferOverflowStub stub2(isolate, kSaveFPRegs); |
| 3885 | stub2.GetCode(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3886 | } |
| 3887 | |
| 3888 | |
| 3889 | // Takes the input in 3 registers: address_ value_ and object_. A pointer to |
| 3890 | // the value has just been written into the object, now this stub makes sure |
| 3891 | // we keep the GC informed. The word in the object where the value has been |
| 3892 | // written is in the address register. |
| 3893 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 3894 | Label skip_to_incremental_noncompacting; |
| 3895 | Label skip_to_incremental_compacting; |
| 3896 | |
| 3897 | // The first two instructions are generated with labels so as to get the |
| 3898 | // offset fixed up correctly by the bind(Label*) call. We patch it back and |
| 3899 | // forth between a compare instructions (a nop in this position) and the |
| 3900 | // real branch when we start and stop incremental heap marking. |
| 3901 | // See RecordWriteStub::Patch for details. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3902 | { |
| 3903 | // Block literal pool emission, as the position of these two instructions |
| 3904 | // is assumed by the patching code. |
| 3905 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 3906 | __ b(&skip_to_incremental_noncompacting); |
| 3907 | __ b(&skip_to_incremental_compacting); |
| 3908 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3909 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3910 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| 3911 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3912 | MacroAssembler::kReturnAtEnd); |
| 3913 | } |
| 3914 | __ Ret(); |
| 3915 | |
| 3916 | __ bind(&skip_to_incremental_noncompacting); |
| 3917 | GenerateIncremental(masm, INCREMENTAL); |
| 3918 | |
| 3919 | __ bind(&skip_to_incremental_compacting); |
| 3920 | GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| 3921 | |
| 3922 | // Initial mode of the stub is expected to be STORE_BUFFER_ONLY. |
| 3923 | // Will be checked in IncrementalMarking::ActivateGeneratedStub. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3924 | DCHECK(Assembler::GetBranchOffset(masm->instr_at(0)) < (1 << 12)); |
| 3925 | DCHECK(Assembler::GetBranchOffset(masm->instr_at(4)) < (1 << 12)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3926 | PatchBranchIntoNop(masm, 0); |
| 3927 | PatchBranchIntoNop(masm, Assembler::kInstrSize); |
| 3928 | } |
| 3929 | |
| 3930 | |
| 3931 | void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| 3932 | regs_.Save(masm); |
| 3933 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3934 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3935 | Label dont_need_remembered_set; |
| 3936 | |
| 3937 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 3938 | __ JumpIfNotInNewSpace(regs_.scratch0(), // Value. |
| 3939 | regs_.scratch0(), |
| 3940 | &dont_need_remembered_set); |
| 3941 | |
| 3942 | __ CheckPageFlag(regs_.object(), |
| 3943 | regs_.scratch0(), |
| 3944 | 1 << MemoryChunk::SCAN_ON_SCAVENGE, |
| 3945 | ne, |
| 3946 | &dont_need_remembered_set); |
| 3947 | |
| 3948 | // First notify the incremental marker if necessary, then update the |
| 3949 | // remembered set. |
| 3950 | CheckNeedsToInformIncrementalMarker( |
| 3951 | masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3952 | InformIncrementalMarker(masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3953 | regs_.Restore(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3954 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3955 | MacroAssembler::kReturnAtEnd); |
| 3956 | |
| 3957 | __ bind(&dont_need_remembered_set); |
| 3958 | } |
| 3959 | |
| 3960 | CheckNeedsToInformIncrementalMarker( |
| 3961 | masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3962 | InformIncrementalMarker(masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3963 | regs_.Restore(masm); |
| 3964 | __ Ret(); |
| 3965 | } |
| 3966 | |
| 3967 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3968 | void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm) { |
| 3969 | regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3970 | int argument_count = 3; |
| 3971 | __ PrepareCallCFunction(argument_count, regs_.scratch0()); |
| 3972 | Register address = |
| 3973 | r0.is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3974 | DCHECK(!address.is(regs_.object())); |
| 3975 | DCHECK(!address.is(r0)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3976 | __ Move(address, regs_.address()); |
| 3977 | __ Move(r0, regs_.object()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3978 | __ Move(r1, address); |
| 3979 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3980 | |
| 3981 | AllowExternalCallThatCantCauseGC scope(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3982 | __ CallCFunction( |
| 3983 | ExternalReference::incremental_marking_record_write_function(isolate()), |
| 3984 | argument_count); |
| 3985 | regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3986 | } |
| 3987 | |
| 3988 | |
| 3989 | void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| 3990 | MacroAssembler* masm, |
| 3991 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 3992 | Mode mode) { |
| 3993 | Label on_black; |
| 3994 | Label need_incremental; |
| 3995 | Label need_incremental_pop_scratch; |
| 3996 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3997 | __ and_(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask)); |
| 3998 | __ ldr(regs_.scratch1(), |
| 3999 | MemOperand(regs_.scratch0(), |
| 4000 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 4001 | __ sub(regs_.scratch1(), regs_.scratch1(), Operand(1), SetCC); |
| 4002 | __ str(regs_.scratch1(), |
| 4003 | MemOperand(regs_.scratch0(), |
| 4004 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 4005 | __ b(mi, &need_incremental); |
| 4006 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 4007 | // Let's look at the color of the object: If it is not black we don't have |
| 4008 | // to inform the incremental marker. |
| 4009 | __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| 4010 | |
| 4011 | regs_.Restore(masm); |
| 4012 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4013 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 4014 | MacroAssembler::kReturnAtEnd); |
| 4015 | } else { |
| 4016 | __ Ret(); |
| 4017 | } |
| 4018 | |
| 4019 | __ bind(&on_black); |
| 4020 | |
| 4021 | // Get the value from the slot. |
| 4022 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 4023 | |
| 4024 | if (mode == INCREMENTAL_COMPACTION) { |
| 4025 | Label ensure_not_white; |
| 4026 | |
| 4027 | __ CheckPageFlag(regs_.scratch0(), // Contains value. |
| 4028 | regs_.scratch1(), // Scratch. |
| 4029 | MemoryChunk::kEvacuationCandidateMask, |
| 4030 | eq, |
| 4031 | &ensure_not_white); |
| 4032 | |
| 4033 | __ CheckPageFlag(regs_.object(), |
| 4034 | regs_.scratch1(), // Scratch. |
| 4035 | MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| 4036 | eq, |
| 4037 | &need_incremental); |
| 4038 | |
| 4039 | __ bind(&ensure_not_white); |
| 4040 | } |
| 4041 | |
| 4042 | // We need extra registers for this, so we push the object and the address |
| 4043 | // register temporarily. |
| 4044 | __ Push(regs_.object(), regs_.address()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4045 | __ JumpIfWhite(regs_.scratch0(), // The value. |
| 4046 | regs_.scratch1(), // Scratch. |
| 4047 | regs_.object(), // Scratch. |
| 4048 | regs_.address(), // Scratch. |
| 4049 | &need_incremental_pop_scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 4050 | __ Pop(regs_.object(), regs_.address()); |
| 4051 | |
| 4052 | regs_.Restore(masm); |
| 4053 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4054 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 4055 | MacroAssembler::kReturnAtEnd); |
| 4056 | } else { |
| 4057 | __ Ret(); |
| 4058 | } |
| 4059 | |
| 4060 | __ bind(&need_incremental_pop_scratch); |
| 4061 | __ Pop(regs_.object(), regs_.address()); |
| 4062 | |
| 4063 | __ bind(&need_incremental); |
| 4064 | |
| 4065 | // Fall through when we need to inform the incremental marker. |
| 4066 | } |
| 4067 | |
| 4068 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4069 | void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
| 4070 | CEntryStub ces(isolate(), 1, kSaveFPRegs); |
| 4071 | __ Call(ces.GetCode(), RelocInfo::CODE_TARGET); |
| 4072 | int parameter_count_offset = |
| 4073 | StubFailureTrampolineFrame::kCallerStackParameterCountFrameOffset; |
| 4074 | __ ldr(r1, MemOperand(fp, parameter_count_offset)); |
| 4075 | if (function_mode() == JS_FUNCTION_STUB_MODE) { |
| 4076 | __ add(r1, r1, Operand(1)); |
| 4077 | } |
| 4078 | masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
| 4079 | __ mov(r1, Operand(r1, LSL, kPointerSizeLog2)); |
| 4080 | __ add(sp, sp, r1); |
| 4081 | __ Ret(); |
| 4082 | } |
| 4083 | |
| 4084 | |
| 4085 | void LoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4086 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| 4087 | LoadICStub stub(isolate(), state()); |
| 4088 | stub.GenerateForTrampoline(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4089 | } |
| 4090 | |
| 4091 | |
| 4092 | void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4093 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
| 4094 | KeyedLoadICStub stub(isolate(), state()); |
| 4095 | stub.GenerateForTrampoline(masm); |
| 4096 | } |
| 4097 | |
| 4098 | |
| 4099 | void CallICTrampolineStub::Generate(MacroAssembler* masm) { |
| 4100 | __ EmitLoadTypeFeedbackVector(r2); |
| 4101 | CallICStub stub(isolate(), state()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4102 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 4103 | } |
| 4104 | |
| 4105 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4106 | void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); } |
| 4107 | |
| 4108 | |
| 4109 | void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 4110 | GenerateImpl(masm, true); |
| 4111 | } |
| 4112 | |
| 4113 | |
| 4114 | static void HandleArrayCases(MacroAssembler* masm, Register feedback, |
| 4115 | Register receiver_map, Register scratch1, |
| 4116 | Register scratch2, bool is_polymorphic, |
| 4117 | Label* miss) { |
| 4118 | // feedback initially contains the feedback array |
| 4119 | Label next_loop, prepare_next; |
| 4120 | Label start_polymorphic; |
| 4121 | |
| 4122 | Register cached_map = scratch1; |
| 4123 | |
| 4124 | __ ldr(cached_map, |
| 4125 | FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(0))); |
| 4126 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 4127 | __ cmp(receiver_map, cached_map); |
| 4128 | __ b(ne, &start_polymorphic); |
| 4129 | // found, now call handler. |
| 4130 | Register handler = feedback; |
| 4131 | __ ldr(handler, FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(1))); |
| 4132 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4133 | |
| 4134 | |
| 4135 | Register length = scratch2; |
| 4136 | __ bind(&start_polymorphic); |
| 4137 | __ ldr(length, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 4138 | if (!is_polymorphic) { |
| 4139 | // If the IC could be monomorphic we have to make sure we don't go past the |
| 4140 | // end of the feedback array. |
| 4141 | __ cmp(length, Operand(Smi::FromInt(2))); |
| 4142 | __ b(eq, miss); |
| 4143 | } |
| 4144 | |
| 4145 | Register too_far = length; |
| 4146 | Register pointer_reg = feedback; |
| 4147 | |
| 4148 | // +-----+------+------+-----+-----+ ... ----+ |
| 4149 | // | map | len | wm0 | h0 | wm1 | hN | |
| 4150 | // +-----+------+------+-----+-----+ ... ----+ |
| 4151 | // 0 1 2 len-1 |
| 4152 | // ^ ^ |
| 4153 | // | | |
| 4154 | // pointer_reg too_far |
| 4155 | // aka feedback scratch2 |
| 4156 | // also need receiver_map |
| 4157 | // use cached_map (scratch1) to look in the weak map values. |
| 4158 | __ add(too_far, feedback, Operand::PointerOffsetFromSmiKey(length)); |
| 4159 | __ add(too_far, too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4160 | __ add(pointer_reg, feedback, |
| 4161 | Operand(FixedArray::OffsetOfElementAt(2) - kHeapObjectTag)); |
| 4162 | |
| 4163 | __ bind(&next_loop); |
| 4164 | __ ldr(cached_map, MemOperand(pointer_reg)); |
| 4165 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 4166 | __ cmp(receiver_map, cached_map); |
| 4167 | __ b(ne, &prepare_next); |
| 4168 | __ ldr(handler, MemOperand(pointer_reg, kPointerSize)); |
| 4169 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4170 | |
| 4171 | __ bind(&prepare_next); |
| 4172 | __ add(pointer_reg, pointer_reg, Operand(kPointerSize * 2)); |
| 4173 | __ cmp(pointer_reg, too_far); |
| 4174 | __ b(lt, &next_loop); |
| 4175 | |
| 4176 | // We exhausted our array of map handler pairs. |
| 4177 | __ jmp(miss); |
| 4178 | } |
| 4179 | |
| 4180 | |
| 4181 | static void HandleMonomorphicCase(MacroAssembler* masm, Register receiver, |
| 4182 | Register receiver_map, Register feedback, |
| 4183 | Register vector, Register slot, |
| 4184 | Register scratch, Label* compare_map, |
| 4185 | Label* load_smi_map, Label* try_array) { |
| 4186 | __ JumpIfSmi(receiver, load_smi_map); |
| 4187 | __ ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 4188 | __ bind(compare_map); |
| 4189 | Register cached_map = scratch; |
| 4190 | // Move the weak map into the weak_cell register. |
| 4191 | __ ldr(cached_map, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| 4192 | __ cmp(cached_map, receiver_map); |
| 4193 | __ b(ne, try_array); |
| 4194 | Register handler = feedback; |
| 4195 | __ add(handler, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4196 | __ ldr(handler, |
| 4197 | FieldMemOperand(handler, FixedArray::kHeaderSize + kPointerSize)); |
| 4198 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4199 | } |
| 4200 | |
| 4201 | |
| 4202 | void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 4203 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r1 |
| 4204 | Register name = LoadWithVectorDescriptor::NameRegister(); // r2 |
| 4205 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // r3 |
| 4206 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // r0 |
| 4207 | Register feedback = r4; |
| 4208 | Register receiver_map = r5; |
| 4209 | Register scratch1 = r6; |
| 4210 | |
| 4211 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4212 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 4213 | |
| 4214 | // Try to quickly handle the monomorphic case without knowing for sure |
| 4215 | // if we have a weak cell in feedback. We do know it's safe to look |
| 4216 | // at WeakCell::kValueOffset. |
| 4217 | Label try_array, load_smi_map, compare_map; |
| 4218 | Label not_array, miss; |
| 4219 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 4220 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 4221 | |
| 4222 | // Is it a fixed array? |
| 4223 | __ bind(&try_array); |
| 4224 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 4225 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 4226 | __ b(ne, ¬_array); |
| 4227 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| 4228 | |
| 4229 | __ bind(¬_array); |
| 4230 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 4231 | __ b(ne, &miss); |
| 4232 | Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags( |
| 4233 | Code::ComputeHandlerFlags(Code::LOAD_IC)); |
| 4234 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags, |
| 4235 | receiver, name, feedback, |
| 4236 | receiver_map, scratch1, r9); |
| 4237 | |
| 4238 | __ bind(&miss); |
| 4239 | LoadIC::GenerateMiss(masm); |
| 4240 | |
| 4241 | __ bind(&load_smi_map); |
| 4242 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 4243 | __ jmp(&compare_map); |
| 4244 | } |
| 4245 | |
| 4246 | |
| 4247 | void KeyedLoadICStub::Generate(MacroAssembler* masm) { |
| 4248 | GenerateImpl(masm, false); |
| 4249 | } |
| 4250 | |
| 4251 | |
| 4252 | void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 4253 | GenerateImpl(masm, true); |
| 4254 | } |
| 4255 | |
| 4256 | |
| 4257 | void KeyedLoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 4258 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r1 |
| 4259 | Register key = LoadWithVectorDescriptor::NameRegister(); // r2 |
| 4260 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // r3 |
| 4261 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // r0 |
| 4262 | Register feedback = r4; |
| 4263 | Register receiver_map = r5; |
| 4264 | Register scratch1 = r6; |
| 4265 | |
| 4266 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4267 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 4268 | |
| 4269 | // Try to quickly handle the monomorphic case without knowing for sure |
| 4270 | // if we have a weak cell in feedback. We do know it's safe to look |
| 4271 | // at WeakCell::kValueOffset. |
| 4272 | Label try_array, load_smi_map, compare_map; |
| 4273 | Label not_array, miss; |
| 4274 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 4275 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 4276 | |
| 4277 | __ bind(&try_array); |
| 4278 | // Is it a fixed array? |
| 4279 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 4280 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 4281 | __ b(ne, ¬_array); |
| 4282 | |
| 4283 | // We have a polymorphic element handler. |
| 4284 | Label polymorphic, try_poly_name; |
| 4285 | __ bind(&polymorphic); |
| 4286 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| 4287 | |
| 4288 | __ bind(¬_array); |
| 4289 | // Is it generic? |
| 4290 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 4291 | __ b(ne, &try_poly_name); |
| 4292 | Handle<Code> megamorphic_stub = |
| 4293 | KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 4294 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 4295 | |
| 4296 | __ bind(&try_poly_name); |
| 4297 | // We might have a name in feedback, and a fixed array in the next slot. |
| 4298 | __ cmp(key, feedback); |
| 4299 | __ b(ne, &miss); |
| 4300 | // If the name comparison succeeded, we know we have a fixed array with |
| 4301 | // at least one map/handler pair. |
| 4302 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4303 | __ ldr(feedback, |
| 4304 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 4305 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, false, &miss); |
| 4306 | |
| 4307 | __ bind(&miss); |
| 4308 | KeyedLoadIC::GenerateMiss(masm); |
| 4309 | |
| 4310 | __ bind(&load_smi_map); |
| 4311 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 4312 | __ jmp(&compare_map); |
| 4313 | } |
| 4314 | |
| 4315 | |
| 4316 | void VectorStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 4317 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 4318 | VectorStoreICStub stub(isolate(), state()); |
| 4319 | stub.GenerateForTrampoline(masm); |
| 4320 | } |
| 4321 | |
| 4322 | |
| 4323 | void VectorKeyedStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 4324 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 4325 | VectorKeyedStoreICStub stub(isolate(), state()); |
| 4326 | stub.GenerateForTrampoline(masm); |
| 4327 | } |
| 4328 | |
| 4329 | |
| 4330 | void VectorStoreICStub::Generate(MacroAssembler* masm) { |
| 4331 | GenerateImpl(masm, false); |
| 4332 | } |
| 4333 | |
| 4334 | |
| 4335 | void VectorStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 4336 | GenerateImpl(masm, true); |
| 4337 | } |
| 4338 | |
| 4339 | |
| 4340 | void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 4341 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r1 |
| 4342 | Register key = VectorStoreICDescriptor::NameRegister(); // r2 |
| 4343 | Register vector = VectorStoreICDescriptor::VectorRegister(); // r3 |
| 4344 | Register slot = VectorStoreICDescriptor::SlotRegister(); // r4 |
| 4345 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(r0)); // r0 |
| 4346 | Register feedback = r5; |
| 4347 | Register receiver_map = r6; |
| 4348 | Register scratch1 = r9; |
| 4349 | |
| 4350 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4351 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 4352 | |
| 4353 | // Try to quickly handle the monomorphic case without knowing for sure |
| 4354 | // if we have a weak cell in feedback. We do know it's safe to look |
| 4355 | // at WeakCell::kValueOffset. |
| 4356 | Label try_array, load_smi_map, compare_map; |
| 4357 | Label not_array, miss; |
| 4358 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 4359 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 4360 | |
| 4361 | // Is it a fixed array? |
| 4362 | __ bind(&try_array); |
| 4363 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 4364 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 4365 | __ b(ne, ¬_array); |
| 4366 | |
| 4367 | // We are using register r8, which is used for the embedded constant pool |
| 4368 | // when FLAG_enable_embedded_constant_pool is true. |
| 4369 | DCHECK(!FLAG_enable_embedded_constant_pool); |
| 4370 | Register scratch2 = r8; |
| 4371 | HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, true, |
| 4372 | &miss); |
| 4373 | |
| 4374 | __ bind(¬_array); |
| 4375 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 4376 | __ b(ne, &miss); |
| 4377 | Code::Flags code_flags = Code::RemoveTypeAndHolderFromFlags( |
| 4378 | Code::ComputeHandlerFlags(Code::STORE_IC)); |
| 4379 | masm->isolate()->stub_cache()->GenerateProbe( |
| 4380 | masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map, |
| 4381 | scratch1, scratch2); |
| 4382 | |
| 4383 | __ bind(&miss); |
| 4384 | StoreIC::GenerateMiss(masm); |
| 4385 | |
| 4386 | __ bind(&load_smi_map); |
| 4387 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 4388 | __ jmp(&compare_map); |
| 4389 | } |
| 4390 | |
| 4391 | |
| 4392 | void VectorKeyedStoreICStub::Generate(MacroAssembler* masm) { |
| 4393 | GenerateImpl(masm, false); |
| 4394 | } |
| 4395 | |
| 4396 | |
| 4397 | void VectorKeyedStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 4398 | GenerateImpl(masm, true); |
| 4399 | } |
| 4400 | |
| 4401 | |
| 4402 | static void HandlePolymorphicStoreCase(MacroAssembler* masm, Register feedback, |
| 4403 | Register receiver_map, Register scratch1, |
| 4404 | Register scratch2, Label* miss) { |
| 4405 | // feedback initially contains the feedback array |
| 4406 | Label next_loop, prepare_next; |
| 4407 | Label start_polymorphic; |
| 4408 | Label transition_call; |
| 4409 | |
| 4410 | Register cached_map = scratch1; |
| 4411 | Register too_far = scratch2; |
| 4412 | Register pointer_reg = feedback; |
| 4413 | __ ldr(too_far, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 4414 | |
| 4415 | // +-----+------+------+-----+-----+-----+ ... ----+ |
| 4416 | // | map | len | wm0 | wt0 | h0 | wm1 | hN | |
| 4417 | // +-----+------+------+-----+-----+ ----+ ... ----+ |
| 4418 | // 0 1 2 len-1 |
| 4419 | // ^ ^ |
| 4420 | // | | |
| 4421 | // pointer_reg too_far |
| 4422 | // aka feedback scratch2 |
| 4423 | // also need receiver_map |
| 4424 | // use cached_map (scratch1) to look in the weak map values. |
| 4425 | __ add(too_far, feedback, Operand::PointerOffsetFromSmiKey(too_far)); |
| 4426 | __ add(too_far, too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 4427 | __ add(pointer_reg, feedback, |
| 4428 | Operand(FixedArray::OffsetOfElementAt(0) - kHeapObjectTag)); |
| 4429 | |
| 4430 | __ bind(&next_loop); |
| 4431 | __ ldr(cached_map, MemOperand(pointer_reg)); |
| 4432 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 4433 | __ cmp(receiver_map, cached_map); |
| 4434 | __ b(ne, &prepare_next); |
| 4435 | // Is it a transitioning store? |
| 4436 | __ ldr(too_far, MemOperand(pointer_reg, kPointerSize)); |
| 4437 | __ CompareRoot(too_far, Heap::kUndefinedValueRootIndex); |
| 4438 | __ b(ne, &transition_call); |
| 4439 | __ ldr(pointer_reg, MemOperand(pointer_reg, kPointerSize * 2)); |
| 4440 | __ add(pc, pointer_reg, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4441 | |
| 4442 | __ bind(&transition_call); |
| 4443 | __ ldr(too_far, FieldMemOperand(too_far, WeakCell::kValueOffset)); |
| 4444 | __ JumpIfSmi(too_far, miss); |
| 4445 | |
| 4446 | __ ldr(receiver_map, MemOperand(pointer_reg, kPointerSize * 2)); |
| 4447 | |
| 4448 | // Load the map into the correct register. |
| 4449 | DCHECK(feedback.is(VectorStoreTransitionDescriptor::MapRegister())); |
| 4450 | __ mov(feedback, too_far); |
| 4451 | |
| 4452 | __ add(pc, receiver_map, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 4453 | |
| 4454 | __ bind(&prepare_next); |
| 4455 | __ add(pointer_reg, pointer_reg, Operand(kPointerSize * 3)); |
| 4456 | __ cmp(pointer_reg, too_far); |
| 4457 | __ b(lt, &next_loop); |
| 4458 | |
| 4459 | // We exhausted our array of map handler pairs. |
| 4460 | __ jmp(miss); |
| 4461 | } |
| 4462 | |
| 4463 | |
| 4464 | void VectorKeyedStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 4465 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r1 |
| 4466 | Register key = VectorStoreICDescriptor::NameRegister(); // r2 |
| 4467 | Register vector = VectorStoreICDescriptor::VectorRegister(); // r3 |
| 4468 | Register slot = VectorStoreICDescriptor::SlotRegister(); // r4 |
| 4469 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(r0)); // r0 |
| 4470 | Register feedback = r5; |
| 4471 | Register receiver_map = r6; |
| 4472 | Register scratch1 = r9; |
| 4473 | |
| 4474 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4475 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 4476 | |
| 4477 | // Try to quickly handle the monomorphic case without knowing for sure |
| 4478 | // if we have a weak cell in feedback. We do know it's safe to look |
| 4479 | // at WeakCell::kValueOffset. |
| 4480 | Label try_array, load_smi_map, compare_map; |
| 4481 | Label not_array, miss; |
| 4482 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 4483 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 4484 | |
| 4485 | __ bind(&try_array); |
| 4486 | // Is it a fixed array? |
| 4487 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 4488 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 4489 | __ b(ne, ¬_array); |
| 4490 | |
| 4491 | // We have a polymorphic element handler. |
| 4492 | Label polymorphic, try_poly_name; |
| 4493 | __ bind(&polymorphic); |
| 4494 | |
| 4495 | // We are using register r8, which is used for the embedded constant pool |
| 4496 | // when FLAG_enable_embedded_constant_pool is true. |
| 4497 | DCHECK(!FLAG_enable_embedded_constant_pool); |
| 4498 | Register scratch2 = r8; |
| 4499 | |
| 4500 | HandlePolymorphicStoreCase(masm, feedback, receiver_map, scratch1, scratch2, |
| 4501 | &miss); |
| 4502 | |
| 4503 | __ bind(¬_array); |
| 4504 | // Is it generic? |
| 4505 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 4506 | __ b(ne, &try_poly_name); |
| 4507 | Handle<Code> megamorphic_stub = |
| 4508 | KeyedStoreIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 4509 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 4510 | |
| 4511 | __ bind(&try_poly_name); |
| 4512 | // We might have a name in feedback, and a fixed array in the next slot. |
| 4513 | __ cmp(key, feedback); |
| 4514 | __ b(ne, &miss); |
| 4515 | // If the name comparison succeeded, we know we have a fixed array with |
| 4516 | // at least one map/handler pair. |
| 4517 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 4518 | __ ldr(feedback, |
| 4519 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 4520 | HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, false, |
| 4521 | &miss); |
| 4522 | |
| 4523 | __ bind(&miss); |
| 4524 | KeyedStoreIC::GenerateMiss(masm); |
| 4525 | |
| 4526 | __ bind(&load_smi_map); |
| 4527 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 4528 | __ jmp(&compare_map); |
| 4529 | } |
| 4530 | |
| 4531 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4532 | void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
| 4533 | if (masm->isolate()->function_entry_hook() != NULL) { |
| 4534 | ProfileEntryHookStub stub(masm->isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4535 | PredictableCodeSizeScope predictable(masm); |
| 4536 | predictable.ExpectSize(masm->CallStubSize(&stub) + |
| 4537 | 2 * Assembler::kInstrSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4538 | __ push(lr); |
| 4539 | __ CallStub(&stub); |
| 4540 | __ pop(lr); |
| 4541 | } |
| 4542 | } |
| 4543 | |
| 4544 | |
| 4545 | void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| 4546 | // The entry hook is a "push lr" instruction, followed by a call. |
| 4547 | const int32_t kReturnAddressDistanceFromFunctionStart = |
| 4548 | 3 * Assembler::kInstrSize; |
| 4549 | |
| 4550 | // This should contain all kCallerSaved registers. |
| 4551 | const RegList kSavedRegs = |
| 4552 | 1 << 0 | // r0 |
| 4553 | 1 << 1 | // r1 |
| 4554 | 1 << 2 | // r2 |
| 4555 | 1 << 3 | // r3 |
| 4556 | 1 << 5 | // r5 |
| 4557 | 1 << 9; // r9 |
| 4558 | // We also save lr, so the count here is one higher than the mask indicates. |
| 4559 | const int32_t kNumSavedRegs = 7; |
| 4560 | |
| 4561 | DCHECK((kCallerSaved & kSavedRegs) == kCallerSaved); |
| 4562 | |
| 4563 | // Save all caller-save registers as this may be called from anywhere. |
| 4564 | __ stm(db_w, sp, kSavedRegs | lr.bit()); |
| 4565 | |
| 4566 | // Compute the function's address for the first argument. |
| 4567 | __ sub(r0, lr, Operand(kReturnAddressDistanceFromFunctionStart)); |
| 4568 | |
| 4569 | // The caller's return address is above the saved temporaries. |
| 4570 | // Grab that for the second argument to the hook. |
| 4571 | __ add(r1, sp, Operand(kNumSavedRegs * kPointerSize)); |
| 4572 | |
| 4573 | // Align the stack if necessary. |
| 4574 | int frame_alignment = masm->ActivationFrameAlignment(); |
| 4575 | if (frame_alignment > kPointerSize) { |
| 4576 | __ mov(r5, sp); |
| 4577 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| 4578 | __ and_(sp, sp, Operand(-frame_alignment)); |
| 4579 | } |
| 4580 | |
| 4581 | #if V8_HOST_ARCH_ARM |
| 4582 | int32_t entry_hook = |
| 4583 | reinterpret_cast<int32_t>(isolate()->function_entry_hook()); |
| 4584 | __ mov(ip, Operand(entry_hook)); |
| 4585 | #else |
| 4586 | // Under the simulator we need to indirect the entry hook through a |
| 4587 | // trampoline function at a known address. |
| 4588 | // It additionally takes an isolate as a third parameter |
| 4589 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 4590 | |
| 4591 | ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
| 4592 | __ mov(ip, Operand(ExternalReference(&dispatcher, |
| 4593 | ExternalReference::BUILTIN_CALL, |
| 4594 | isolate()))); |
| 4595 | #endif |
| 4596 | __ Call(ip); |
| 4597 | |
| 4598 | // Restore the stack pointer if needed. |
| 4599 | if (frame_alignment > kPointerSize) { |
| 4600 | __ mov(sp, r5); |
| 4601 | } |
| 4602 | |
| 4603 | // Also pop pc to get Ret(0). |
| 4604 | __ ldm(ia_w, sp, kSavedRegs | pc.bit()); |
| 4605 | } |
| 4606 | |
| 4607 | |
| 4608 | template<class T> |
| 4609 | static void CreateArrayDispatch(MacroAssembler* masm, |
| 4610 | AllocationSiteOverrideMode mode) { |
| 4611 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4612 | T stub(masm->isolate(), GetInitialFastElementsKind(), mode); |
| 4613 | __ TailCallStub(&stub); |
| 4614 | } else if (mode == DONT_OVERRIDE) { |
| 4615 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 4616 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4617 | for (int i = 0; i <= last_index; ++i) { |
| 4618 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4619 | __ cmp(r3, Operand(kind)); |
| 4620 | T stub(masm->isolate(), kind); |
| 4621 | __ TailCallStub(&stub, eq); |
| 4622 | } |
| 4623 | |
| 4624 | // If we reached this point there is a problem. |
| 4625 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4626 | } else { |
| 4627 | UNREACHABLE(); |
| 4628 | } |
| 4629 | } |
| 4630 | |
| 4631 | |
| 4632 | static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| 4633 | AllocationSiteOverrideMode mode) { |
| 4634 | // r2 - allocation site (if mode != DISABLE_ALLOCATION_SITES) |
| 4635 | // r3 - kind (if mode != DISABLE_ALLOCATION_SITES) |
| 4636 | // r0 - number of arguments |
| 4637 | // r1 - constructor? |
| 4638 | // sp[0] - last argument |
| 4639 | Label normal_sequence; |
| 4640 | if (mode == DONT_OVERRIDE) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4641 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 4642 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 4643 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 4644 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| 4645 | STATIC_ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| 4646 | STATIC_ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4647 | |
| 4648 | // is the low bit set? If so, we are holey and that is good. |
| 4649 | __ tst(r3, Operand(1)); |
| 4650 | __ b(ne, &normal_sequence); |
| 4651 | } |
| 4652 | |
| 4653 | // look at the first argument |
| 4654 | __ ldr(r5, MemOperand(sp, 0)); |
| 4655 | __ cmp(r5, Operand::Zero()); |
| 4656 | __ b(eq, &normal_sequence); |
| 4657 | |
| 4658 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4659 | ElementsKind initial = GetInitialFastElementsKind(); |
| 4660 | ElementsKind holey_initial = GetHoleyElementsKind(initial); |
| 4661 | |
| 4662 | ArraySingleArgumentConstructorStub stub_holey(masm->isolate(), |
| 4663 | holey_initial, |
| 4664 | DISABLE_ALLOCATION_SITES); |
| 4665 | __ TailCallStub(&stub_holey); |
| 4666 | |
| 4667 | __ bind(&normal_sequence); |
| 4668 | ArraySingleArgumentConstructorStub stub(masm->isolate(), |
| 4669 | initial, |
| 4670 | DISABLE_ALLOCATION_SITES); |
| 4671 | __ TailCallStub(&stub); |
| 4672 | } else if (mode == DONT_OVERRIDE) { |
| 4673 | // We are going to create a holey array, but our kind is non-holey. |
| 4674 | // Fix kind and retry (only if we have an allocation site in the slot). |
| 4675 | __ add(r3, r3, Operand(1)); |
| 4676 | |
| 4677 | if (FLAG_debug_code) { |
| 4678 | __ ldr(r5, FieldMemOperand(r2, 0)); |
| 4679 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 4680 | __ Assert(eq, kExpectedAllocationSite); |
| 4681 | } |
| 4682 | |
| 4683 | // Save the resulting elements kind in type info. We can't just store r3 |
| 4684 | // in the AllocationSite::transition_info field because elements kind is |
| 4685 | // restricted to a portion of the field...upper bits need to be left alone. |
| 4686 | STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| 4687 | __ ldr(r4, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4688 | __ add(r4, r4, Operand(Smi::FromInt(kFastElementsKindPackedToHoley))); |
| 4689 | __ str(r4, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4690 | |
| 4691 | __ bind(&normal_sequence); |
| 4692 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 4693 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4694 | for (int i = 0; i <= last_index; ++i) { |
| 4695 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4696 | __ cmp(r3, Operand(kind)); |
| 4697 | ArraySingleArgumentConstructorStub stub(masm->isolate(), kind); |
| 4698 | __ TailCallStub(&stub, eq); |
| 4699 | } |
| 4700 | |
| 4701 | // If we reached this point there is a problem. |
| 4702 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4703 | } else { |
| 4704 | UNREACHABLE(); |
| 4705 | } |
| 4706 | } |
| 4707 | |
| 4708 | |
| 4709 | template<class T> |
| 4710 | static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
| 4711 | int to_index = GetSequenceIndexFromFastElementsKind( |
| 4712 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4713 | for (int i = 0; i <= to_index; ++i) { |
| 4714 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4715 | T stub(isolate, kind); |
| 4716 | stub.GetCode(); |
| 4717 | if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) { |
| 4718 | T stub1(isolate, kind, DISABLE_ALLOCATION_SITES); |
| 4719 | stub1.GetCode(); |
| 4720 | } |
| 4721 | } |
| 4722 | } |
| 4723 | |
| 4724 | |
| 4725 | void ArrayConstructorStubBase::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 4726 | ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| 4727 | isolate); |
| 4728 | ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>( |
| 4729 | isolate); |
| 4730 | ArrayConstructorStubAheadOfTimeHelper<ArrayNArgumentsConstructorStub>( |
| 4731 | isolate); |
| 4732 | } |
| 4733 | |
| 4734 | |
| 4735 | void InternalArrayConstructorStubBase::GenerateStubsAheadOfTime( |
| 4736 | Isolate* isolate) { |
| 4737 | ElementsKind kinds[2] = { FAST_ELEMENTS, FAST_HOLEY_ELEMENTS }; |
| 4738 | for (int i = 0; i < 2; i++) { |
| 4739 | // For internal arrays we only need a few things |
| 4740 | InternalArrayNoArgumentConstructorStub stubh1(isolate, kinds[i]); |
| 4741 | stubh1.GetCode(); |
| 4742 | InternalArraySingleArgumentConstructorStub stubh2(isolate, kinds[i]); |
| 4743 | stubh2.GetCode(); |
| 4744 | InternalArrayNArgumentsConstructorStub stubh3(isolate, kinds[i]); |
| 4745 | stubh3.GetCode(); |
| 4746 | } |
| 4747 | } |
| 4748 | |
| 4749 | |
| 4750 | void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| 4751 | MacroAssembler* masm, |
| 4752 | AllocationSiteOverrideMode mode) { |
| 4753 | if (argument_count() == ANY) { |
| 4754 | Label not_zero_case, not_one_case; |
| 4755 | __ tst(r0, r0); |
| 4756 | __ b(ne, ¬_zero_case); |
| 4757 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4758 | |
| 4759 | __ bind(¬_zero_case); |
| 4760 | __ cmp(r0, Operand(1)); |
| 4761 | __ b(gt, ¬_one_case); |
| 4762 | CreateArrayDispatchOneArgument(masm, mode); |
| 4763 | |
| 4764 | __ bind(¬_one_case); |
| 4765 | CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| 4766 | } else if (argument_count() == NONE) { |
| 4767 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4768 | } else if (argument_count() == ONE) { |
| 4769 | CreateArrayDispatchOneArgument(masm, mode); |
| 4770 | } else if (argument_count() == MORE_THAN_ONE) { |
| 4771 | CreateArrayDispatch<ArrayNArgumentsConstructorStub>(masm, mode); |
| 4772 | } else { |
| 4773 | UNREACHABLE(); |
| 4774 | } |
| 4775 | } |
| 4776 | |
| 4777 | |
| 4778 | void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4779 | // ----------- S t a t e ------------- |
| 4780 | // -- r0 : argc (only if argument_count() == ANY) |
| 4781 | // -- r1 : constructor |
| 4782 | // -- r2 : AllocationSite or undefined |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4783 | // -- r3 : new target |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4784 | // -- sp[0] : return address |
| 4785 | // -- sp[4] : last argument |
| 4786 | // ----------------------------------- |
| 4787 | |
| 4788 | if (FLAG_debug_code) { |
| 4789 | // The array construct code is only set for the global and natives |
| 4790 | // builtin Array functions which always have maps. |
| 4791 | |
| 4792 | // Initial map for the builtin Array function should be a map. |
| 4793 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4794 | // Will both indicate a NULL and a Smi. |
| 4795 | __ tst(r4, Operand(kSmiTagMask)); |
| 4796 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| 4797 | __ CompareObjectType(r4, r4, r5, MAP_TYPE); |
| 4798 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| 4799 | |
| 4800 | // We should either have undefined in r2 or a valid AllocationSite |
| 4801 | __ AssertUndefinedOrAllocationSite(r2, r4); |
| 4802 | } |
| 4803 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4804 | // Enter the context of the Array function. |
| 4805 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 4806 | |
| 4807 | Label subclassing; |
| 4808 | __ cmp(r3, r1); |
| 4809 | __ b(ne, &subclassing); |
| 4810 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4811 | Label no_info; |
| 4812 | // Get the elements kind and case on that. |
| 4813 | __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
| 4814 | __ b(eq, &no_info); |
| 4815 | |
| 4816 | __ ldr(r3, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4817 | __ SmiUntag(r3); |
| 4818 | STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| 4819 | __ and_(r3, r3, Operand(AllocationSite::ElementsKindBits::kMask)); |
| 4820 | GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| 4821 | |
| 4822 | __ bind(&no_info); |
| 4823 | GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4824 | |
| 4825 | __ bind(&subclassing); |
| 4826 | switch (argument_count()) { |
| 4827 | case ANY: |
| 4828 | case MORE_THAN_ONE: |
| 4829 | __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| 4830 | __ add(r0, r0, Operand(3)); |
| 4831 | break; |
| 4832 | case NONE: |
| 4833 | __ str(r1, MemOperand(sp, 0 * kPointerSize)); |
| 4834 | __ mov(r0, Operand(3)); |
| 4835 | break; |
| 4836 | case ONE: |
| 4837 | __ str(r1, MemOperand(sp, 1 * kPointerSize)); |
| 4838 | __ mov(r0, Operand(4)); |
| 4839 | break; |
| 4840 | } |
| 4841 | __ Push(r3, r2); |
| 4842 | __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4843 | } |
| 4844 | |
| 4845 | |
| 4846 | void InternalArrayConstructorStub::GenerateCase( |
| 4847 | MacroAssembler* masm, ElementsKind kind) { |
| 4848 | __ cmp(r0, Operand(1)); |
| 4849 | |
| 4850 | InternalArrayNoArgumentConstructorStub stub0(isolate(), kind); |
| 4851 | __ TailCallStub(&stub0, lo); |
| 4852 | |
| 4853 | InternalArrayNArgumentsConstructorStub stubN(isolate(), kind); |
| 4854 | __ TailCallStub(&stubN, hi); |
| 4855 | |
| 4856 | if (IsFastPackedElementsKind(kind)) { |
| 4857 | // We might need to create a holey array |
| 4858 | // look at the first argument |
| 4859 | __ ldr(r3, MemOperand(sp, 0)); |
| 4860 | __ cmp(r3, Operand::Zero()); |
| 4861 | |
| 4862 | InternalArraySingleArgumentConstructorStub |
| 4863 | stub1_holey(isolate(), GetHoleyElementsKind(kind)); |
| 4864 | __ TailCallStub(&stub1_holey, ne); |
| 4865 | } |
| 4866 | |
| 4867 | InternalArraySingleArgumentConstructorStub stub1(isolate(), kind); |
| 4868 | __ TailCallStub(&stub1); |
| 4869 | } |
| 4870 | |
| 4871 | |
| 4872 | void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4873 | // ----------- S t a t e ------------- |
| 4874 | // -- r0 : argc |
| 4875 | // -- r1 : constructor |
| 4876 | // -- sp[0] : return address |
| 4877 | // -- sp[4] : last argument |
| 4878 | // ----------------------------------- |
| 4879 | |
| 4880 | if (FLAG_debug_code) { |
| 4881 | // The array construct code is only set for the global and natives |
| 4882 | // builtin Array functions which always have maps. |
| 4883 | |
| 4884 | // Initial map for the builtin Array function should be a map. |
| 4885 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4886 | // Will both indicate a NULL and a Smi. |
| 4887 | __ tst(r3, Operand(kSmiTagMask)); |
| 4888 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| 4889 | __ CompareObjectType(r3, r3, r4, MAP_TYPE); |
| 4890 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| 4891 | } |
| 4892 | |
| 4893 | // Figure out the right elements kind |
| 4894 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4895 | // Load the map's "bit field 2" into |result|. We only need the first byte, |
| 4896 | // but the following bit field extraction takes care of that anyway. |
| 4897 | __ ldr(r3, FieldMemOperand(r3, Map::kBitField2Offset)); |
| 4898 | // Retrieve elements_kind from bit field 2. |
| 4899 | __ DecodeField<Map::ElementsKindBits>(r3); |
| 4900 | |
| 4901 | if (FLAG_debug_code) { |
| 4902 | Label done; |
| 4903 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
| 4904 | __ b(eq, &done); |
| 4905 | __ cmp(r3, Operand(FAST_HOLEY_ELEMENTS)); |
| 4906 | __ Assert(eq, |
| 4907 | kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
| 4908 | __ bind(&done); |
| 4909 | } |
| 4910 | |
| 4911 | Label fast_elements_case; |
| 4912 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
| 4913 | __ b(eq, &fast_elements_case); |
| 4914 | GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| 4915 | |
| 4916 | __ bind(&fast_elements_case); |
| 4917 | GenerateCase(masm, FAST_ELEMENTS); |
| 4918 | } |
| 4919 | |
| 4920 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 4921 | void LoadGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| 4922 | Register context = cp; |
| 4923 | Register result = r0; |
| 4924 | Register slot = r2; |
| 4925 | |
| 4926 | // Go up the context chain to the script context. |
| 4927 | for (int i = 0; i < depth(); ++i) { |
| 4928 | __ ldr(result, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| 4929 | context = result; |
| 4930 | } |
| 4931 | |
| 4932 | // Load the PropertyCell value at the specified slot. |
| 4933 | __ add(result, context, Operand(slot, LSL, kPointerSizeLog2)); |
| 4934 | __ ldr(result, ContextMemOperand(result)); |
| 4935 | __ ldr(result, FieldMemOperand(result, PropertyCell::kValueOffset)); |
| 4936 | |
| 4937 | // If the result is not the_hole, return. Otherwise, handle in the runtime. |
| 4938 | __ CompareRoot(result, Heap::kTheHoleValueRootIndex); |
| 4939 | __ Ret(ne); |
| 4940 | |
| 4941 | // Fallback to runtime. |
| 4942 | __ SmiTag(slot); |
| 4943 | __ push(slot); |
| 4944 | __ TailCallRuntime(Runtime::kLoadGlobalViaContext); |
| 4945 | } |
| 4946 | |
| 4947 | |
| 4948 | void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| 4949 | Register value = r0; |
| 4950 | Register slot = r2; |
| 4951 | |
| 4952 | Register cell = r1; |
| 4953 | Register cell_details = r4; |
| 4954 | Register cell_value = r5; |
| 4955 | Register cell_value_map = r6; |
| 4956 | Register scratch = r9; |
| 4957 | |
| 4958 | Register context = cp; |
| 4959 | Register context_temp = cell; |
| 4960 | |
| 4961 | Label fast_heapobject_case, fast_smi_case, slow_case; |
| 4962 | |
| 4963 | if (FLAG_debug_code) { |
| 4964 | __ CompareRoot(value, Heap::kTheHoleValueRootIndex); |
| 4965 | __ Check(ne, kUnexpectedValue); |
| 4966 | } |
| 4967 | |
| 4968 | // Go up the context chain to the script context. |
| 4969 | for (int i = 0; i < depth(); i++) { |
| 4970 | __ ldr(context_temp, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| 4971 | context = context_temp; |
| 4972 | } |
| 4973 | |
| 4974 | // Load the PropertyCell at the specified slot. |
| 4975 | __ add(cell, context, Operand(slot, LSL, kPointerSizeLog2)); |
| 4976 | __ ldr(cell, ContextMemOperand(cell)); |
| 4977 | |
| 4978 | // Load PropertyDetails for the cell (actually only the cell_type and kind). |
| 4979 | __ ldr(cell_details, FieldMemOperand(cell, PropertyCell::kDetailsOffset)); |
| 4980 | __ SmiUntag(cell_details); |
| 4981 | __ and_(cell_details, cell_details, |
| 4982 | Operand(PropertyDetails::PropertyCellTypeField::kMask | |
| 4983 | PropertyDetails::KindField::kMask | |
| 4984 | PropertyDetails::kAttributesReadOnlyMask)); |
| 4985 | |
| 4986 | // Check if PropertyCell holds mutable data. |
| 4987 | Label not_mutable_data; |
| 4988 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 4989 | PropertyCellType::kMutable) | |
| 4990 | PropertyDetails::KindField::encode(kData))); |
| 4991 | __ b(ne, ¬_mutable_data); |
| 4992 | __ JumpIfSmi(value, &fast_smi_case); |
| 4993 | |
| 4994 | __ bind(&fast_heapobject_case); |
| 4995 | __ str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 4996 | // RecordWriteField clobbers the value register, so we copy it before the |
| 4997 | // call. |
| 4998 | __ mov(r4, Operand(value)); |
| 4999 | __ RecordWriteField(cell, PropertyCell::kValueOffset, r4, scratch, |
| 5000 | kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| 5001 | OMIT_SMI_CHECK); |
| 5002 | __ Ret(); |
| 5003 | |
| 5004 | __ bind(¬_mutable_data); |
| 5005 | // Check if PropertyCell value matches the new value (relevant for Constant, |
| 5006 | // ConstantType and Undefined cells). |
| 5007 | Label not_same_value; |
| 5008 | __ ldr(cell_value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5009 | __ cmp(cell_value, value); |
| 5010 | __ b(ne, ¬_same_value); |
| 5011 | |
| 5012 | // Make sure the PropertyCell is not marked READ_ONLY. |
| 5013 | __ tst(cell_details, Operand(PropertyDetails::kAttributesReadOnlyMask)); |
| 5014 | __ b(ne, &slow_case); |
| 5015 | |
| 5016 | if (FLAG_debug_code) { |
| 5017 | Label done; |
| 5018 | // This can only be true for Constant, ConstantType and Undefined cells, |
| 5019 | // because we never store the_hole via this stub. |
| 5020 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 5021 | PropertyCellType::kConstant) | |
| 5022 | PropertyDetails::KindField::encode(kData))); |
| 5023 | __ b(eq, &done); |
| 5024 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 5025 | PropertyCellType::kConstantType) | |
| 5026 | PropertyDetails::KindField::encode(kData))); |
| 5027 | __ b(eq, &done); |
| 5028 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 5029 | PropertyCellType::kUndefined) | |
| 5030 | PropertyDetails::KindField::encode(kData))); |
| 5031 | __ Check(eq, kUnexpectedValue); |
| 5032 | __ bind(&done); |
| 5033 | } |
| 5034 | __ Ret(); |
| 5035 | __ bind(¬_same_value); |
| 5036 | |
| 5037 | // Check if PropertyCell contains data with constant type (and is not |
| 5038 | // READ_ONLY). |
| 5039 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 5040 | PropertyCellType::kConstantType) | |
| 5041 | PropertyDetails::KindField::encode(kData))); |
| 5042 | __ b(ne, &slow_case); |
| 5043 | |
| 5044 | // Now either both old and new values must be smis or both must be heap |
| 5045 | // objects with same map. |
| 5046 | Label value_is_heap_object; |
| 5047 | __ JumpIfNotSmi(value, &value_is_heap_object); |
| 5048 | __ JumpIfNotSmi(cell_value, &slow_case); |
| 5049 | // Old and new values are smis, no need for a write barrier here. |
| 5050 | __ bind(&fast_smi_case); |
| 5051 | __ str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5052 | __ Ret(); |
| 5053 | |
| 5054 | __ bind(&value_is_heap_object); |
| 5055 | __ JumpIfSmi(cell_value, &slow_case); |
| 5056 | |
| 5057 | __ ldr(cell_value_map, FieldMemOperand(cell_value, HeapObject::kMapOffset)); |
| 5058 | __ ldr(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 5059 | __ cmp(cell_value_map, scratch); |
| 5060 | __ b(eq, &fast_heapobject_case); |
| 5061 | |
| 5062 | // Fallback to runtime. |
| 5063 | __ bind(&slow_case); |
| 5064 | __ SmiTag(slot); |
| 5065 | __ Push(slot, value); |
| 5066 | __ TailCallRuntime(is_strict(language_mode()) |
| 5067 | ? Runtime::kStoreGlobalViaContext_Strict |
| 5068 | : Runtime::kStoreGlobalViaContext_Sloppy); |
| 5069 | } |
| 5070 | |
| 5071 | |
| 5072 | static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| 5073 | return ref0.address() - ref1.address(); |
| 5074 | } |
| 5075 | |
| 5076 | |
| 5077 | // Calls an API function. Allocates HandleScope, extracts returned value |
| 5078 | // from handle and propagates exceptions. Restores context. stack_space |
| 5079 | // - space to be unwound on exit (includes the call JS arguments space and |
| 5080 | // the additional space allocated for the fast call). |
| 5081 | static void CallApiFunctionAndReturn(MacroAssembler* masm, |
| 5082 | Register function_address, |
| 5083 | ExternalReference thunk_ref, |
| 5084 | int stack_space, |
| 5085 | MemOperand* stack_space_operand, |
| 5086 | MemOperand return_value_operand, |
| 5087 | MemOperand* context_restore_operand) { |
| 5088 | Isolate* isolate = masm->isolate(); |
| 5089 | ExternalReference next_address = |
| 5090 | ExternalReference::handle_scope_next_address(isolate); |
| 5091 | const int kNextOffset = 0; |
| 5092 | const int kLimitOffset = AddressOffset( |
| 5093 | ExternalReference::handle_scope_limit_address(isolate), next_address); |
| 5094 | const int kLevelOffset = AddressOffset( |
| 5095 | ExternalReference::handle_scope_level_address(isolate), next_address); |
| 5096 | |
| 5097 | DCHECK(function_address.is(r1) || function_address.is(r2)); |
| 5098 | |
| 5099 | Label profiler_disabled; |
| 5100 | Label end_profiler_check; |
| 5101 | __ mov(r9, Operand(ExternalReference::is_profiling_address(isolate))); |
| 5102 | __ ldrb(r9, MemOperand(r9, 0)); |
| 5103 | __ cmp(r9, Operand(0)); |
| 5104 | __ b(eq, &profiler_disabled); |
| 5105 | |
| 5106 | // Additional parameter is the address of the actual callback. |
| 5107 | __ mov(r3, Operand(thunk_ref)); |
| 5108 | __ jmp(&end_profiler_check); |
| 5109 | |
| 5110 | __ bind(&profiler_disabled); |
| 5111 | __ Move(r3, function_address); |
| 5112 | __ bind(&end_profiler_check); |
| 5113 | |
| 5114 | // Allocate HandleScope in callee-save registers. |
| 5115 | __ mov(r9, Operand(next_address)); |
| 5116 | __ ldr(r4, MemOperand(r9, kNextOffset)); |
| 5117 | __ ldr(r5, MemOperand(r9, kLimitOffset)); |
| 5118 | __ ldr(r6, MemOperand(r9, kLevelOffset)); |
| 5119 | __ add(r6, r6, Operand(1)); |
| 5120 | __ str(r6, MemOperand(r9, kLevelOffset)); |
| 5121 | |
| 5122 | if (FLAG_log_timer_events) { |
| 5123 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5124 | __ PushSafepointRegisters(); |
| 5125 | __ PrepareCallCFunction(1, r0); |
| 5126 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5127 | __ CallCFunction(ExternalReference::log_enter_external_function(isolate), |
| 5128 | 1); |
| 5129 | __ PopSafepointRegisters(); |
| 5130 | } |
| 5131 | |
| 5132 | // Native call returns to the DirectCEntry stub which redirects to the |
| 5133 | // return address pushed on stack (could have moved after GC). |
| 5134 | // DirectCEntry stub itself is generated early and never moves. |
| 5135 | DirectCEntryStub stub(isolate); |
| 5136 | stub.GenerateCall(masm, r3); |
| 5137 | |
| 5138 | if (FLAG_log_timer_events) { |
| 5139 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5140 | __ PushSafepointRegisters(); |
| 5141 | __ PrepareCallCFunction(1, r0); |
| 5142 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5143 | __ CallCFunction(ExternalReference::log_leave_external_function(isolate), |
| 5144 | 1); |
| 5145 | __ PopSafepointRegisters(); |
| 5146 | } |
| 5147 | |
| 5148 | Label promote_scheduled_exception; |
| 5149 | Label delete_allocated_handles; |
| 5150 | Label leave_exit_frame; |
| 5151 | Label return_value_loaded; |
| 5152 | |
| 5153 | // load value from ReturnValue |
| 5154 | __ ldr(r0, return_value_operand); |
| 5155 | __ bind(&return_value_loaded); |
| 5156 | // No more valid handles (the result handle was the last one). Restore |
| 5157 | // previous handle scope. |
| 5158 | __ str(r4, MemOperand(r9, kNextOffset)); |
| 5159 | if (__ emit_debug_code()) { |
| 5160 | __ ldr(r1, MemOperand(r9, kLevelOffset)); |
| 5161 | __ cmp(r1, r6); |
| 5162 | __ Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| 5163 | } |
| 5164 | __ sub(r6, r6, Operand(1)); |
| 5165 | __ str(r6, MemOperand(r9, kLevelOffset)); |
| 5166 | __ ldr(ip, MemOperand(r9, kLimitOffset)); |
| 5167 | __ cmp(r5, ip); |
| 5168 | __ b(ne, &delete_allocated_handles); |
| 5169 | |
| 5170 | // Leave the API exit frame. |
| 5171 | __ bind(&leave_exit_frame); |
| 5172 | bool restore_context = context_restore_operand != NULL; |
| 5173 | if (restore_context) { |
| 5174 | __ ldr(cp, *context_restore_operand); |
| 5175 | } |
| 5176 | // LeaveExitFrame expects unwind space to be in a register. |
| 5177 | if (stack_space_operand != NULL) { |
| 5178 | __ ldr(r4, *stack_space_operand); |
| 5179 | } else { |
| 5180 | __ mov(r4, Operand(stack_space)); |
| 5181 | } |
| 5182 | __ LeaveExitFrame(false, r4, !restore_context, stack_space_operand != NULL); |
| 5183 | |
| 5184 | // Check if the function scheduled an exception. |
| 5185 | __ LoadRoot(r4, Heap::kTheHoleValueRootIndex); |
| 5186 | __ mov(ip, Operand(ExternalReference::scheduled_exception_address(isolate))); |
| 5187 | __ ldr(r5, MemOperand(ip)); |
| 5188 | __ cmp(r4, r5); |
| 5189 | __ b(ne, &promote_scheduled_exception); |
| 5190 | |
| 5191 | __ mov(pc, lr); |
| 5192 | |
| 5193 | // Re-throw by promoting a scheduled exception. |
| 5194 | __ bind(&promote_scheduled_exception); |
| 5195 | __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| 5196 | |
| 5197 | // HandleScope limit has changed. Delete allocated extensions. |
| 5198 | __ bind(&delete_allocated_handles); |
| 5199 | __ str(r5, MemOperand(r9, kLimitOffset)); |
| 5200 | __ mov(r4, r0); |
| 5201 | __ PrepareCallCFunction(1, r5); |
| 5202 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5203 | __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate), |
| 5204 | 1); |
| 5205 | __ mov(r0, r4); |
| 5206 | __ jmp(&leave_exit_frame); |
| 5207 | } |
| 5208 | |
| 5209 | |
| 5210 | static void CallApiFunctionStubHelper(MacroAssembler* masm, |
| 5211 | const ParameterCount& argc, |
| 5212 | bool return_first_arg, |
| 5213 | bool call_data_undefined) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5214 | // ----------- S t a t e ------------- |
| 5215 | // -- r0 : callee |
| 5216 | // -- r4 : call_data |
| 5217 | // -- r2 : holder |
| 5218 | // -- r1 : api_function_address |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5219 | // -- r3 : number of arguments if argc is a register |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5220 | // -- cp : context |
| 5221 | // -- |
| 5222 | // -- sp[0] : last argument |
| 5223 | // -- ... |
| 5224 | // -- sp[(argc - 1)* 4] : first argument |
| 5225 | // -- sp[argc * 4] : receiver |
| 5226 | // ----------------------------------- |
| 5227 | |
| 5228 | Register callee = r0; |
| 5229 | Register call_data = r4; |
| 5230 | Register holder = r2; |
| 5231 | Register api_function_address = r1; |
| 5232 | Register context = cp; |
| 5233 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5234 | typedef FunctionCallbackArguments FCA; |
| 5235 | |
| 5236 | STATIC_ASSERT(FCA::kContextSaveIndex == 6); |
| 5237 | STATIC_ASSERT(FCA::kCalleeIndex == 5); |
| 5238 | STATIC_ASSERT(FCA::kDataIndex == 4); |
| 5239 | STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| 5240 | STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| 5241 | STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| 5242 | STATIC_ASSERT(FCA::kHolderIndex == 0); |
| 5243 | STATIC_ASSERT(FCA::kArgsLength == 7); |
| 5244 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5245 | DCHECK(argc.is_immediate() || r3.is(argc.reg())); |
| 5246 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5247 | // context save |
| 5248 | __ push(context); |
| 5249 | // load context from callee |
| 5250 | __ ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset)); |
| 5251 | |
| 5252 | // callee |
| 5253 | __ push(callee); |
| 5254 | |
| 5255 | // call data |
| 5256 | __ push(call_data); |
| 5257 | |
| 5258 | Register scratch = call_data; |
| 5259 | if (!call_data_undefined) { |
| 5260 | __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| 5261 | } |
| 5262 | // return value |
| 5263 | __ push(scratch); |
| 5264 | // return value default |
| 5265 | __ push(scratch); |
| 5266 | // isolate |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5267 | __ mov(scratch, Operand(ExternalReference::isolate_address(masm->isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5268 | __ push(scratch); |
| 5269 | // holder |
| 5270 | __ push(holder); |
| 5271 | |
| 5272 | // Prepare arguments. |
| 5273 | __ mov(scratch, sp); |
| 5274 | |
| 5275 | // Allocate the v8::Arguments structure in the arguments' space since |
| 5276 | // it's not controlled by GC. |
| 5277 | const int kApiStackSpace = 4; |
| 5278 | |
| 5279 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5280 | __ EnterExitFrame(false, kApiStackSpace); |
| 5281 | |
| 5282 | DCHECK(!api_function_address.is(r0) && !scratch.is(r0)); |
| 5283 | // r0 = FunctionCallbackInfo& |
| 5284 | // Arguments is after the return address. |
| 5285 | __ add(r0, sp, Operand(1 * kPointerSize)); |
| 5286 | // FunctionCallbackInfo::implicit_args_ |
| 5287 | __ str(scratch, MemOperand(r0, 0 * kPointerSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5288 | if (argc.is_immediate()) { |
| 5289 | // FunctionCallbackInfo::values_ |
| 5290 | __ add(ip, scratch, |
| 5291 | Operand((FCA::kArgsLength - 1 + argc.immediate()) * kPointerSize)); |
| 5292 | __ str(ip, MemOperand(r0, 1 * kPointerSize)); |
| 5293 | // FunctionCallbackInfo::length_ = argc |
| 5294 | __ mov(ip, Operand(argc.immediate())); |
| 5295 | __ str(ip, MemOperand(r0, 2 * kPointerSize)); |
| 5296 | // FunctionCallbackInfo::is_construct_call_ = 0 |
| 5297 | __ mov(ip, Operand::Zero()); |
| 5298 | __ str(ip, MemOperand(r0, 3 * kPointerSize)); |
| 5299 | } else { |
| 5300 | // FunctionCallbackInfo::values_ |
| 5301 | __ add(ip, scratch, Operand(argc.reg(), LSL, kPointerSizeLog2)); |
| 5302 | __ add(ip, ip, Operand((FCA::kArgsLength - 1) * kPointerSize)); |
| 5303 | __ str(ip, MemOperand(r0, 1 * kPointerSize)); |
| 5304 | // FunctionCallbackInfo::length_ = argc |
| 5305 | __ str(argc.reg(), MemOperand(r0, 2 * kPointerSize)); |
| 5306 | // FunctionCallbackInfo::is_construct_call_ |
| 5307 | __ add(argc.reg(), argc.reg(), Operand(FCA::kArgsLength + 1)); |
| 5308 | __ mov(ip, Operand(argc.reg(), LSL, kPointerSizeLog2)); |
| 5309 | __ str(ip, MemOperand(r0, 3 * kPointerSize)); |
| 5310 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5311 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5312 | ExternalReference thunk_ref = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5313 | ExternalReference::invoke_function_callback(masm->isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5314 | |
| 5315 | AllowExternalCallThatCantCauseGC scope(masm); |
| 5316 | MemOperand context_restore_operand( |
| 5317 | fp, (2 + FCA::kContextSaveIndex) * kPointerSize); |
| 5318 | // Stores return the first js argument |
| 5319 | int return_value_offset = 0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5320 | if (return_first_arg) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5321 | return_value_offset = 2 + FCA::kArgsLength; |
| 5322 | } else { |
| 5323 | return_value_offset = 2 + FCA::kReturnValueOffset; |
| 5324 | } |
| 5325 | MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5326 | int stack_space = 0; |
| 5327 | MemOperand is_construct_call_operand = MemOperand(sp, 4 * kPointerSize); |
| 5328 | MemOperand* stack_space_operand = &is_construct_call_operand; |
| 5329 | if (argc.is_immediate()) { |
| 5330 | stack_space = argc.immediate() + FCA::kArgsLength + 1; |
| 5331 | stack_space_operand = NULL; |
| 5332 | } |
| 5333 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| 5334 | stack_space_operand, return_value_operand, |
| 5335 | &context_restore_operand); |
| 5336 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5337 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5338 | |
| 5339 | void CallApiFunctionStub::Generate(MacroAssembler* masm) { |
| 5340 | bool call_data_undefined = this->call_data_undefined(); |
| 5341 | CallApiFunctionStubHelper(masm, ParameterCount(r3), false, |
| 5342 | call_data_undefined); |
| 5343 | } |
| 5344 | |
| 5345 | |
| 5346 | void CallApiAccessorStub::Generate(MacroAssembler* masm) { |
| 5347 | bool is_store = this->is_store(); |
| 5348 | int argc = this->argc(); |
| 5349 | bool call_data_undefined = this->call_data_undefined(); |
| 5350 | CallApiFunctionStubHelper(masm, ParameterCount(argc), is_store, |
| 5351 | call_data_undefined); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5352 | } |
| 5353 | |
| 5354 | |
| 5355 | void CallApiGetterStub::Generate(MacroAssembler* masm) { |
| 5356 | // ----------- S t a t e ------------- |
| 5357 | // -- sp[0] : name |
| 5358 | // -- sp[4 - kArgsLength*4] : PropertyCallbackArguments object |
| 5359 | // -- ... |
| 5360 | // -- r2 : api_function_address |
| 5361 | // ----------------------------------- |
| 5362 | |
| 5363 | Register api_function_address = ApiGetterDescriptor::function_address(); |
| 5364 | DCHECK(api_function_address.is(r2)); |
| 5365 | |
| 5366 | __ mov(r0, sp); // r0 = Handle<Name> |
| 5367 | __ add(r1, r0, Operand(1 * kPointerSize)); // r1 = PCA |
| 5368 | |
| 5369 | const int kApiStackSpace = 1; |
| 5370 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5371 | __ EnterExitFrame(false, kApiStackSpace); |
| 5372 | |
| 5373 | // Create PropertyAccessorInfo instance on the stack above the exit frame with |
| 5374 | // r1 (internal::Object** args_) as the data. |
| 5375 | __ str(r1, MemOperand(sp, 1 * kPointerSize)); |
| 5376 | __ add(r1, sp, Operand(1 * kPointerSize)); // r1 = AccessorInfo& |
| 5377 | |
| 5378 | const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| 5379 | |
| 5380 | ExternalReference thunk_ref = |
| 5381 | ExternalReference::invoke_accessor_getter_callback(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5382 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
| 5383 | kStackUnwindSpace, NULL, |
| 5384 | MemOperand(fp, 6 * kPointerSize), NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5385 | } |
| 5386 | |
| 5387 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5388 | #undef __ |
| 5389 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 5390 | } // namespace internal |
| 5391 | } // namespace v8 |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5392 | |
| 5393 | #endif // V8_TARGET_ARCH_ARM |