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 | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 7 | #include "src/code-stubs.h" |
| 8 | #include "src/api-arguments.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 9 | #include "src/base/bits.h" |
| 10 | #include "src/bootstrapper.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 11 | #include "src/codegen.h" |
| 12 | #include "src/ic/handler-compiler.h" |
| 13 | #include "src/ic/ic.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 14 | #include "src/ic/stub-cache.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 15 | #include "src/isolate.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 16 | #include "src/regexp/jsregexp.h" |
| 17 | #include "src/regexp/regexp-macro-assembler.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 18 | #include "src/runtime/runtime.h" |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 19 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 20 | #include "src/arm/code-stubs-arm.h" |
| 21 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 22 | namespace v8 { |
| 23 | namespace internal { |
| 24 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 25 | #define __ ACCESS_MASM(masm) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 26 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 27 | void ArrayNArgumentsConstructorStub::Generate(MacroAssembler* masm) { |
| 28 | __ lsl(r5, r0, Operand(kPointerSizeLog2)); |
| 29 | __ str(r1, MemOperand(sp, r5)); |
| 30 | __ Push(r1); |
| 31 | __ Push(r2); |
| 32 | __ add(r0, r0, Operand(3)); |
| 33 | __ TailCallRuntime(Runtime::kNewArray); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 34 | } |
| 35 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 36 | void FastArrayPushStub::InitializeDescriptor(CodeStubDescriptor* descriptor) { |
| 37 | Address deopt_handler = Runtime::FunctionForId(Runtime::kArrayPush)->entry; |
| 38 | descriptor->Initialize(r0, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
| 39 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 40 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 41 | void FastFunctionBindStub::InitializeDescriptor( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 42 | CodeStubDescriptor* descriptor) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 43 | Address deopt_handler = Runtime::FunctionForId(Runtime::kFunctionBind)->entry; |
| 44 | descriptor->Initialize(r0, deopt_handler, -1, JS_FUNCTION_STUB_MODE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 47 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 48 | Condition cond); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 49 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 50 | Register lhs, |
| 51 | Register rhs, |
| 52 | Label* lhs_not_nan, |
| 53 | Label* slow, |
| 54 | bool strict); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 55 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 56 | Register lhs, |
| 57 | Register rhs); |
| 58 | |
| 59 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 60 | void HydrogenCodeStub::GenerateLightweightMiss(MacroAssembler* masm, |
| 61 | ExternalReference miss) { |
| 62 | // Update the static counter each time a new code stub is generated. |
| 63 | isolate()->counters()->code_stubs()->Increment(); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 64 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 65 | CallInterfaceDescriptor descriptor = GetCallInterfaceDescriptor(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 66 | int param_count = descriptor.GetRegisterParameterCount(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 67 | { |
| 68 | // Call the runtime system in a fresh internal frame. |
| 69 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 70 | DCHECK(param_count == 0 || |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 71 | r0.is(descriptor.GetRegisterParameter(param_count - 1))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 72 | // Push arguments |
| 73 | for (int i = 0; i < param_count; ++i) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 74 | __ push(descriptor.GetRegisterParameter(i)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 75 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 76 | __ CallExternalReference(miss, param_count); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 77 | } |
| 78 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 79 | __ Ret(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 80 | } |
| 81 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 82 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 83 | void DoubleToIStub::Generate(MacroAssembler* masm) { |
| 84 | Label out_of_range, only_low, negate, done; |
| 85 | Register input_reg = source(); |
| 86 | Register result_reg = destination(); |
| 87 | DCHECK(is_truncating()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 88 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 89 | int double_offset = offset(); |
| 90 | // Account for saved regs if input is sp. |
| 91 | if (input_reg.is(sp)) double_offset += 3 * kPointerSize; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 92 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 93 | Register scratch = GetRegisterThatIsNotOneOf(input_reg, result_reg); |
| 94 | Register scratch_low = |
| 95 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch); |
| 96 | Register scratch_high = |
| 97 | GetRegisterThatIsNotOneOf(input_reg, result_reg, scratch, scratch_low); |
| 98 | LowDwVfpRegister double_scratch = kScratchDoubleReg; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 99 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 100 | __ Push(scratch_high, scratch_low, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 101 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 102 | if (!skip_fastpath()) { |
| 103 | // Load double input. |
| 104 | __ vldr(double_scratch, MemOperand(input_reg, double_offset)); |
| 105 | __ vmov(scratch_low, scratch_high, double_scratch); |
| 106 | |
| 107 | // Do fast-path convert from double to int. |
| 108 | __ vcvt_s32_f64(double_scratch.low(), double_scratch); |
| 109 | __ vmov(result_reg, double_scratch.low()); |
| 110 | |
| 111 | // If result is not saturated (0x7fffffff or 0x80000000), we are done. |
| 112 | __ sub(scratch, result_reg, Operand(1)); |
| 113 | __ cmp(scratch, Operand(0x7ffffffe)); |
| 114 | __ b(lt, &done); |
| 115 | } else { |
| 116 | // We've already done MacroAssembler::TryFastTruncatedDoubleToILoad, so we |
| 117 | // know exponent > 31, so we can skip the vcvt_s32_f64 which will saturate. |
| 118 | if (double_offset == 0) { |
| 119 | __ ldm(ia, input_reg, scratch_low.bit() | scratch_high.bit()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 120 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | __ ldr(scratch_low, MemOperand(input_reg, double_offset)); |
| 122 | __ ldr(scratch_high, MemOperand(input_reg, double_offset + kIntSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 123 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 124 | } |
| 125 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 126 | __ Ubfx(scratch, scratch_high, |
| 127 | HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 128 | // Load scratch with exponent - 1. This is faster than loading |
| 129 | // with exponent because Bias + 1 = 1024 which is an *ARM* immediate value. |
| 130 | STATIC_ASSERT(HeapNumber::kExponentBias + 1 == 1024); |
| 131 | __ sub(scratch, scratch, Operand(HeapNumber::kExponentBias + 1)); |
| 132 | // If exponent is greater than or equal to 84, the 32 less significant |
| 133 | // bits are 0s (2^84 = 1, 52 significant bits, 32 uncoded bits), |
| 134 | // the result is 0. |
| 135 | // Compare exponent with 84 (compare exponent - 1 with 83). |
| 136 | __ cmp(scratch, Operand(83)); |
| 137 | __ b(ge, &out_of_range); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 138 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 139 | // If we reach this code, 31 <= exponent <= 83. |
| 140 | // So, we don't have to handle cases where 0 <= exponent <= 20 for |
| 141 | // which we would need to shift right the high part of the mantissa. |
| 142 | // Scratch contains exponent - 1. |
| 143 | // Load scratch with 52 - exponent (load with 51 - (exponent - 1)). |
| 144 | __ rsb(scratch, scratch, Operand(51), SetCC); |
| 145 | __ b(ls, &only_low); |
| 146 | // 21 <= exponent <= 51, shift scratch_low and scratch_high |
| 147 | // to generate the result. |
| 148 | __ mov(scratch_low, Operand(scratch_low, LSR, scratch)); |
| 149 | // Scratch contains: 52 - exponent. |
| 150 | // We needs: exponent - 20. |
| 151 | // So we use: 32 - scratch = 32 - 52 + exponent = exponent - 20. |
| 152 | __ rsb(scratch, scratch, Operand(32)); |
| 153 | __ Ubfx(result_reg, scratch_high, |
| 154 | 0, HeapNumber::kMantissaBitsInTopWord); |
| 155 | // Set the implicit 1 before the mantissa part in scratch_high. |
| 156 | __ orr(result_reg, result_reg, |
| 157 | Operand(1 << HeapNumber::kMantissaBitsInTopWord)); |
| 158 | __ orr(result_reg, scratch_low, Operand(result_reg, LSL, scratch)); |
| 159 | __ b(&negate); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 160 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 161 | __ bind(&out_of_range); |
| 162 | __ mov(result_reg, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 163 | __ b(&done); |
| 164 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 165 | __ bind(&only_low); |
| 166 | // 52 <= exponent <= 83, shift only scratch_low. |
| 167 | // On entry, scratch contains: 52 - exponent. |
| 168 | __ rsb(scratch, scratch, Operand::Zero()); |
| 169 | __ mov(result_reg, Operand(scratch_low, LSL, scratch)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 170 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 171 | __ bind(&negate); |
| 172 | // If input was positive, scratch_high ASR 31 equals 0 and |
| 173 | // scratch_high LSR 31 equals zero. |
| 174 | // New result = (result eor 0) + 0 = result. |
| 175 | // If the input was negative, we have to negate the result. |
| 176 | // Input_high ASR 31 equals 0xffffffff and scratch_high LSR 31 equals 1. |
| 177 | // New result = (result eor 0xffffffff) + 1 = 0 - result. |
| 178 | __ eor(result_reg, result_reg, Operand(scratch_high, ASR, 31)); |
| 179 | __ add(result_reg, result_reg, Operand(scratch_high, LSR, 31)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 180 | |
| 181 | __ bind(&done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 182 | |
| 183 | __ Pop(scratch_high, scratch_low, scratch); |
| 184 | __ Ret(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 185 | } |
| 186 | |
| 187 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 188 | // Handle the case where the lhs and rhs are the same object. |
| 189 | // Equality is almost reflexive (everything but NaN), so this is a test |
| 190 | // for "identity and not NaN". |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 191 | static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 192 | Condition cond) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 193 | Label not_identical; |
| 194 | Label heap_number, return_equal; |
| 195 | __ cmp(r0, r1); |
| 196 | __ b(ne, ¬_identical); |
| 197 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 198 | // Test for NaN. Sadly, we can't just compare to Factory::nan_value(), |
| 199 | // so we do the second best thing - test it ourselves. |
| 200 | // They are both equal and they are not both Smis so both of them are not |
| 201 | // Smis. If it's not a heap number, then return equal. |
| 202 | if (cond == lt || cond == gt) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 203 | // Call runtime on identical JSObjects. |
| 204 | __ CompareObjectType(r0, r4, r4, FIRST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 205 | __ b(ge, slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 206 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 207 | __ cmp(r4, Operand(SYMBOL_TYPE)); |
| 208 | __ b(eq, slow); |
| 209 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 210 | __ cmp(r4, Operand(SIMD128_VALUE_TYPE)); |
| 211 | __ b(eq, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 212 | } else { |
| 213 | __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE); |
| 214 | __ b(eq, &heap_number); |
| 215 | // Comparing JS objects with <=, >= is complicated. |
| 216 | if (cond != eq) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 217 | __ cmp(r4, Operand(FIRST_JS_RECEIVER_TYPE)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 218 | __ b(ge, slow); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 219 | // Call runtime on identical symbols since we need to throw a TypeError. |
| 220 | __ cmp(r4, Operand(SYMBOL_TYPE)); |
| 221 | __ b(eq, slow); |
| 222 | // Call runtime on identical SIMD values since we must throw a TypeError. |
| 223 | __ cmp(r4, Operand(SIMD128_VALUE_TYPE)); |
| 224 | __ b(eq, slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 225 | // Normally here we fall through to return_equal, but undefined is |
| 226 | // special: (undefined == undefined) == true, but |
| 227 | // (undefined <= undefined) == false! See ECMAScript 11.8.5. |
| 228 | if (cond == le || cond == ge) { |
| 229 | __ cmp(r4, Operand(ODDBALL_TYPE)); |
| 230 | __ b(ne, &return_equal); |
| 231 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 232 | __ cmp(r0, r2); |
| 233 | __ b(ne, &return_equal); |
| 234 | if (cond == le) { |
| 235 | // undefined <= undefined should fail. |
| 236 | __ mov(r0, Operand(GREATER)); |
| 237 | } else { |
| 238 | // undefined >= undefined should fail. |
| 239 | __ mov(r0, Operand(LESS)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 240 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 241 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 242 | } |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | __ bind(&return_equal); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 247 | if (cond == lt) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 248 | __ mov(r0, Operand(GREATER)); // Things aren't less than themselves. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 249 | } else if (cond == gt) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 250 | __ mov(r0, Operand(LESS)); // Things aren't greater than themselves. |
| 251 | } else { |
| 252 | __ mov(r0, Operand(EQUAL)); // Things are <=, >=, ==, === themselves. |
| 253 | } |
| 254 | __ Ret(); |
| 255 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 256 | // For less and greater we don't have to check for NaN since the result of |
| 257 | // x < x is false regardless. For the others here is some code to check |
| 258 | // for NaN. |
| 259 | if (cond != lt && cond != gt) { |
| 260 | __ bind(&heap_number); |
| 261 | // It is a heap number, so return non-equal if it's NaN and equal if it's |
| 262 | // not NaN. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 263 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 264 | // The representation of NaN values has all exponent bits (52..62) set, |
| 265 | // and not all mantissa bits (0..51) clear. |
| 266 | // Read top bits of double representation (second word of value). |
| 267 | __ ldr(r2, FieldMemOperand(r0, HeapNumber::kExponentOffset)); |
| 268 | // Test that exponent bits are all set. |
| 269 | __ Sbfx(r3, r2, HeapNumber::kExponentShift, HeapNumber::kExponentBits); |
| 270 | // NaNs have all-one exponents so they sign extend to -1. |
| 271 | __ cmp(r3, Operand(-1)); |
| 272 | __ b(ne, &return_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 273 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 274 | // Shift out flag and all exponent bits, retaining only mantissa. |
| 275 | __ mov(r2, Operand(r2, LSL, HeapNumber::kNonMantissaBitsInTopWord)); |
| 276 | // Or with all low-bits of mantissa. |
| 277 | __ ldr(r3, FieldMemOperand(r0, HeapNumber::kMantissaOffset)); |
| 278 | __ orr(r0, r3, Operand(r2), SetCC); |
| 279 | // For equal we already have the right value in r0: Return zero (equal) |
| 280 | // if all bits in mantissa are zero (it's an Infinity) and non-zero if |
| 281 | // not (it's a NaN). For <= and >= we need to load r0 with the failing |
| 282 | // value if it's a NaN. |
| 283 | if (cond != eq) { |
| 284 | // All-zero means Infinity means equal. |
| 285 | __ Ret(eq); |
| 286 | if (cond == le) { |
| 287 | __ mov(r0, Operand(GREATER)); // NaN <= NaN should fail. |
| 288 | } else { |
| 289 | __ mov(r0, Operand(LESS)); // NaN >= NaN should fail. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 290 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 291 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 292 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 293 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 294 | // No fall through here. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 295 | |
| 296 | __ bind(¬_identical); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | // See comment at call site. |
| 301 | static void EmitSmiNonsmiComparison(MacroAssembler* masm, |
| 302 | Register lhs, |
| 303 | Register rhs, |
| 304 | Label* lhs_not_nan, |
| 305 | Label* slow, |
| 306 | bool strict) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 307 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 308 | (lhs.is(r1) && rhs.is(r0))); |
| 309 | |
| 310 | Label rhs_is_smi; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 311 | __ JumpIfSmi(rhs, &rhs_is_smi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 312 | |
| 313 | // Lhs is a Smi. Check whether the rhs is a heap number. |
| 314 | __ CompareObjectType(rhs, r4, r4, HEAP_NUMBER_TYPE); |
| 315 | if (strict) { |
| 316 | // If rhs is not a number and lhs is a Smi then strict equality cannot |
| 317 | // succeed. Return non-equal |
| 318 | // If rhs is r0 then there is already a non zero value in it. |
| 319 | if (!rhs.is(r0)) { |
| 320 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 321 | } |
| 322 | __ Ret(ne); |
| 323 | } else { |
| 324 | // Smi compared non-strictly with a non-Smi non-heap-number. Call |
| 325 | // the runtime. |
| 326 | __ b(ne, slow); |
| 327 | } |
| 328 | |
| 329 | // Lhs is a smi, rhs is a number. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 330 | // Convert lhs to a double in d7. |
| 331 | __ SmiToDouble(d7, lhs); |
| 332 | // Load the double from rhs, tagged HeapNumber r0, to d6. |
| 333 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 334 | |
| 335 | // We now have both loaded as doubles but we can skip the lhs nan check |
| 336 | // since it's a smi. |
| 337 | __ jmp(lhs_not_nan); |
| 338 | |
| 339 | __ bind(&rhs_is_smi); |
| 340 | // Rhs is a smi. Check whether the non-smi lhs is a heap number. |
| 341 | __ CompareObjectType(lhs, r4, r4, HEAP_NUMBER_TYPE); |
| 342 | if (strict) { |
| 343 | // If lhs is not a number and rhs is a smi then strict equality cannot |
| 344 | // succeed. Return non-equal. |
| 345 | // If lhs is r0 then there is already a non zero value in it. |
| 346 | if (!lhs.is(r0)) { |
| 347 | __ mov(r0, Operand(NOT_EQUAL), LeaveCC, ne); |
| 348 | } |
| 349 | __ Ret(ne); |
| 350 | } else { |
| 351 | // Smi compared non-strictly with a non-smi non-heap-number. Call |
| 352 | // the runtime. |
| 353 | __ b(ne, slow); |
| 354 | } |
| 355 | |
| 356 | // Rhs is a smi, lhs is a heap number. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 357 | // Load the double from lhs, tagged HeapNumber r1, to d7. |
| 358 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
| 359 | // Convert rhs to a double in d6 . |
| 360 | __ SmiToDouble(d6, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 361 | // Fall through to both_loaded_as_doubles. |
| 362 | } |
| 363 | |
| 364 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 365 | // See comment at call site. |
| 366 | static void EmitStrictTwoHeapObjectCompare(MacroAssembler* masm, |
| 367 | Register lhs, |
| 368 | Register rhs) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 369 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 370 | (lhs.is(r1) && rhs.is(r0))); |
| 371 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 372 | // 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] | 373 | // not equal since their pointers are different. |
| 374 | // There is no test for undetectability in strict equality. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 375 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 376 | Label first_non_object; |
| 377 | // 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] | 378 | // FIRST_JS_RECEIVER_TYPE. |
| 379 | __ CompareObjectType(rhs, r2, r2, FIRST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 380 | __ b(lt, &first_non_object); |
| 381 | |
| 382 | // Return non-zero (r0 is not zero) |
| 383 | Label return_not_equal; |
| 384 | __ bind(&return_not_equal); |
| 385 | __ Ret(); |
| 386 | |
| 387 | __ bind(&first_non_object); |
| 388 | // Check for oddballs: true, false, null, undefined. |
| 389 | __ cmp(r2, Operand(ODDBALL_TYPE)); |
| 390 | __ b(eq, &return_not_equal); |
| 391 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 392 | __ CompareObjectType(lhs, r3, r3, FIRST_JS_RECEIVER_TYPE); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 393 | __ b(ge, &return_not_equal); |
| 394 | |
| 395 | // Check for oddballs: true, false, null, undefined. |
| 396 | __ cmp(r3, Operand(ODDBALL_TYPE)); |
| 397 | __ b(eq, &return_not_equal); |
| 398 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 399 | // Now that we have the types we might as well check for |
| 400 | // internalized-internalized. |
| 401 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 402 | __ orr(r2, r2, Operand(r3)); |
| 403 | __ tst(r2, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 404 | __ b(eq, &return_not_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | |
| 408 | // See comment at call site. |
| 409 | static void EmitCheckForTwoHeapNumbers(MacroAssembler* masm, |
| 410 | Register lhs, |
| 411 | Register rhs, |
| 412 | Label* both_loaded_as_doubles, |
| 413 | Label* not_heap_numbers, |
| 414 | Label* slow) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 415 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 416 | (lhs.is(r1) && rhs.is(r0))); |
| 417 | |
| 418 | __ CompareObjectType(rhs, r3, r2, HEAP_NUMBER_TYPE); |
| 419 | __ b(ne, not_heap_numbers); |
| 420 | __ ldr(r2, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
| 421 | __ cmp(r2, r3); |
| 422 | __ b(ne, slow); // First was a heap number, second wasn't. Go slow case. |
| 423 | |
| 424 | // Both are heap numbers. Load them up then jump to the code we have |
| 425 | // for that. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 426 | __ vldr(d6, rhs, HeapNumber::kValueOffset - kHeapObjectTag); |
| 427 | __ vldr(d7, lhs, HeapNumber::kValueOffset - kHeapObjectTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 428 | __ jmp(both_loaded_as_doubles); |
| 429 | } |
| 430 | |
| 431 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 432 | // Fast negative check for internalized-to-internalized equality or receiver |
| 433 | // equality. Also handles the undetectable receiver to null/undefined |
| 434 | // comparison. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 435 | static void EmitCheckForInternalizedStringsOrObjects(MacroAssembler* masm, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 436 | Register lhs, Register rhs, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 437 | Label* possible_strings, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 438 | Label* runtime_call) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 439 | DCHECK((lhs.is(r0) && rhs.is(r1)) || |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 440 | (lhs.is(r1) && rhs.is(r0))); |
| 441 | |
| 442 | // r2 is object type of rhs. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 443 | Label object_test, return_equal, return_unequal, undetectable; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 444 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 445 | __ tst(r2, Operand(kIsNotStringMask)); |
| 446 | __ b(ne, &object_test); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 447 | __ tst(r2, Operand(kIsNotInternalizedMask)); |
| 448 | __ b(ne, possible_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 449 | __ CompareObjectType(lhs, r3, r3, FIRST_NONSTRING_TYPE); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 450 | __ b(ge, runtime_call); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 451 | __ tst(r3, Operand(kIsNotInternalizedMask)); |
| 452 | __ b(ne, possible_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 453 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 454 | // Both are internalized. We already checked they weren't the same pointer so |
| 455 | // they are not equal. Return non-equal by returning the non-zero object |
| 456 | // pointer in r0. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 457 | __ Ret(); |
| 458 | |
| 459 | __ bind(&object_test); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 460 | __ ldr(r2, FieldMemOperand(lhs, HeapObject::kMapOffset)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 461 | __ ldr(r3, FieldMemOperand(rhs, HeapObject::kMapOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 462 | __ ldrb(r4, FieldMemOperand(r2, Map::kBitFieldOffset)); |
| 463 | __ ldrb(r5, FieldMemOperand(r3, Map::kBitFieldOffset)); |
| 464 | __ tst(r4, Operand(1 << Map::kIsUndetectable)); |
| 465 | __ b(ne, &undetectable); |
| 466 | __ tst(r5, Operand(1 << Map::kIsUndetectable)); |
| 467 | __ b(ne, &return_unequal); |
| 468 | |
| 469 | __ CompareInstanceType(r2, r2, FIRST_JS_RECEIVER_TYPE); |
| 470 | __ b(lt, runtime_call); |
| 471 | __ CompareInstanceType(r3, r3, FIRST_JS_RECEIVER_TYPE); |
| 472 | __ b(lt, runtime_call); |
| 473 | |
| 474 | __ bind(&return_unequal); |
| 475 | // Return non-equal by returning the non-zero object pointer in r0. |
| 476 | __ Ret(); |
| 477 | |
| 478 | __ bind(&undetectable); |
| 479 | __ tst(r5, Operand(1 << Map::kIsUndetectable)); |
| 480 | __ b(eq, &return_unequal); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 481 | |
| 482 | // If both sides are JSReceivers, then the result is false according to |
| 483 | // the HTML specification, which says that only comparisons with null or |
| 484 | // undefined are affected by special casing for document.all. |
| 485 | __ CompareInstanceType(r2, r2, ODDBALL_TYPE); |
| 486 | __ b(eq, &return_equal); |
| 487 | __ CompareInstanceType(r3, r3, ODDBALL_TYPE); |
| 488 | __ b(ne, &return_unequal); |
| 489 | |
| 490 | __ bind(&return_equal); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 491 | __ mov(r0, Operand(EQUAL)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 492 | __ Ret(); |
| 493 | } |
| 494 | |
| 495 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 496 | static void CompareICStub_CheckInputType(MacroAssembler* masm, Register input, |
| 497 | Register scratch, |
| 498 | CompareICState::State expected, |
| 499 | Label* fail) { |
| 500 | Label ok; |
| 501 | if (expected == CompareICState::SMI) { |
| 502 | __ JumpIfNotSmi(input, fail); |
| 503 | } else if (expected == CompareICState::NUMBER) { |
| 504 | __ JumpIfSmi(input, &ok); |
| 505 | __ CheckMap(input, scratch, Heap::kHeapNumberMapRootIndex, fail, |
| 506 | DONT_DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 507 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 508 | // We could be strict about internalized/non-internalized here, but as long as |
| 509 | // hydrogen doesn't care, the stub doesn't have to care either. |
| 510 | __ bind(&ok); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 514 | // On entry r1 and r2 are the values to be compared. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 515 | // On exit r0 is 0, positive or negative to indicate the result of |
| 516 | // the comparison. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 517 | void CompareICStub::GenerateGeneric(MacroAssembler* masm) { |
| 518 | Register lhs = r1; |
| 519 | Register rhs = r0; |
| 520 | Condition cc = GetCondition(); |
| 521 | |
| 522 | Label miss; |
| 523 | CompareICStub_CheckInputType(masm, lhs, r2, left(), &miss); |
| 524 | CompareICStub_CheckInputType(masm, rhs, r3, right(), &miss); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 525 | |
| 526 | Label slow; // Call builtin. |
| 527 | Label not_smis, both_loaded_as_doubles, lhs_not_nan; |
| 528 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 529 | Label not_two_smis, smi_done; |
| 530 | __ orr(r2, r1, r0); |
| 531 | __ JumpIfNotSmi(r2, ¬_two_smis); |
| 532 | __ mov(r1, Operand(r1, ASR, 1)); |
| 533 | __ sub(r0, r1, Operand(r0, ASR, 1)); |
| 534 | __ Ret(); |
| 535 | __ bind(¬_two_smis); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 536 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 537 | // NOTICE! This code is only reached after a smi-fast-case check, so |
| 538 | // it is certain that at least one operand isn't a smi. |
| 539 | |
| 540 | // Handle the case where the objects are identical. Either returns the answer |
| 541 | // or goes to slow. Only falls through if the objects were not identical. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 542 | EmitIdenticalObjectComparison(masm, &slow, cc); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 543 | |
| 544 | // If either is a Smi (we know that not both are), then they can only |
| 545 | // be strictly equal if the other is a HeapNumber. |
| 546 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 547 | DCHECK_EQ(static_cast<Smi*>(0), Smi::FromInt(0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 548 | __ and_(r2, lhs, Operand(rhs)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 549 | __ JumpIfNotSmi(r2, ¬_smis); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 550 | // One operand is a smi. EmitSmiNonsmiComparison generates code that can: |
| 551 | // 1) Return the answer. |
| 552 | // 2) Go to slow. |
| 553 | // 3) Fall through to both_loaded_as_doubles. |
| 554 | // 4) Jump to lhs_not_nan. |
| 555 | // In cases 3 and 4 we have found out we were dealing with a number-number |
| 556 | // comparison. If VFP3 is supported the double values of the numbers have |
| 557 | // been loaded into d7 and d6. Otherwise, the double values have been loaded |
| 558 | // into r0, r1, r2, and r3. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 559 | EmitSmiNonsmiComparison(masm, lhs, rhs, &lhs_not_nan, &slow, strict()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 560 | |
| 561 | __ bind(&both_loaded_as_doubles); |
| 562 | // The arguments have been converted to doubles and stored in d6 and d7, if |
| 563 | // VFP3 is supported, or in r0, r1, r2, and r3. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 564 | __ bind(&lhs_not_nan); |
| 565 | Label no_nan; |
| 566 | // ARMv7 VFP3 instructions to implement double precision comparison. |
| 567 | __ VFPCompareAndSetFlags(d7, d6); |
| 568 | Label nan; |
| 569 | __ b(vs, &nan); |
| 570 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 571 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 572 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 573 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 574 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 575 | __ bind(&nan); |
| 576 | // If one of the sides was a NaN then the v flag is set. Load r0 with |
| 577 | // whatever it takes to make the comparison fail, since comparisons with NaN |
| 578 | // always fail. |
| 579 | if (cc == lt || cc == le) { |
| 580 | __ mov(r0, Operand(GREATER)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 581 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 582 | __ mov(r0, Operand(LESS)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 583 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 584 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 585 | |
| 586 | __ bind(¬_smis); |
| 587 | // At this point we know we are dealing with two different objects, |
| 588 | // 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] | 589 | if (strict()) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 590 | // This returns non-equal for some object types, or falls through if it |
| 591 | // was not lucky. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 592 | EmitStrictTwoHeapObjectCompare(masm, lhs, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 593 | } |
| 594 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 595 | Label check_for_internalized_strings; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 596 | Label flat_string_check; |
| 597 | // Check for heap-number-heap-number comparison. Can jump to slow case, |
| 598 | // 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] | 599 | // that case. If the inputs are not doubles then jumps to |
| 600 | // check_for_internalized_strings. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 601 | // In this case r2 will contain the type of rhs_. Never falls through. |
| 602 | EmitCheckForTwoHeapNumbers(masm, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 603 | lhs, |
| 604 | rhs, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 605 | &both_loaded_as_doubles, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 606 | &check_for_internalized_strings, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 607 | &flat_string_check); |
| 608 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 609 | __ bind(&check_for_internalized_strings); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 610 | // In the strict case the EmitStrictTwoHeapObjectCompare already took care of |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 611 | // internalized strings. |
| 612 | if (cc == eq && !strict()) { |
| 613 | // Returns an answer for two internalized strings or two detectable objects. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 614 | // Otherwise jumps to string case or not both strings case. |
| 615 | // Assumes that r2 is the type of rhs_ on entry. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 616 | EmitCheckForInternalizedStringsOrObjects( |
| 617 | masm, lhs, rhs, &flat_string_check, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 618 | } |
| 619 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 620 | // Check for both being sequential one-byte strings, |
| 621 | // and inline if that is the case. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 622 | __ bind(&flat_string_check); |
| 623 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 624 | __ JumpIfNonSmisNotBothSequentialOneByteStrings(lhs, rhs, r2, r3, &slow); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 625 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 626 | __ IncrementCounter(isolate()->counters()->string_compare_native(), 1, r2, |
| 627 | r3); |
| 628 | if (cc == eq) { |
| 629 | StringHelper::GenerateFlatOneByteStringEquals(masm, lhs, rhs, r2, r3, r4); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 630 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 631 | StringHelper::GenerateCompareFlatOneByteStrings(masm, lhs, rhs, r2, r3, r4, |
| 632 | r5); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 633 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 634 | // Never falls through to here. |
| 635 | |
| 636 | __ bind(&slow); |
| 637 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 638 | if (cc == eq) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 639 | { |
| 640 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 641 | __ Push(lhs, rhs); |
| 642 | __ CallRuntime(strict() ? Runtime::kStrictEqual : Runtime::kEqual); |
| 643 | } |
| 644 | // Turn true into 0 and false into some non-zero value. |
| 645 | STATIC_ASSERT(EQUAL == 0); |
| 646 | __ LoadRoot(r1, Heap::kTrueValueRootIndex); |
| 647 | __ sub(r0, r0, r1); |
| 648 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 649 | } else { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 650 | __ Push(lhs, rhs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 651 | int ncr; // NaN compare result |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 652 | if (cc == lt || cc == le) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 653 | ncr = GREATER; |
| 654 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 655 | DCHECK(cc == gt || cc == ge); // remaining cases |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 656 | ncr = LESS; |
| 657 | } |
| 658 | __ mov(r0, Operand(Smi::FromInt(ncr))); |
| 659 | __ push(r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 660 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 661 | // Call the native; it returns -1 (less), 0 (equal), or 1 (greater) |
| 662 | // tagged as a small integer. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 663 | __ TailCallRuntime(Runtime::kCompare); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 664 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 665 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 666 | __ bind(&miss); |
| 667 | GenerateMiss(masm); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 668 | } |
| 669 | |
| 670 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 671 | void StoreBufferOverflowStub::Generate(MacroAssembler* masm) { |
| 672 | // We don't allow a GC during a store buffer overflow so there is no need to |
| 673 | // store the registers in any particular way, but we do have to store and |
| 674 | // restore them. |
| 675 | __ stm(db_w, sp, kCallerSaved | lr.bit()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 676 | |
| 677 | const Register scratch = r1; |
| 678 | |
| 679 | if (save_doubles()) { |
| 680 | __ SaveFPRegs(sp, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 681 | } |
| 682 | const int argument_count = 1; |
| 683 | const int fp_argument_count = 0; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 684 | |
| 685 | AllowExternalCallThatCantCauseGC scope(masm); |
| 686 | __ PrepareCallCFunction(argument_count, fp_argument_count, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 687 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 688 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 689 | ExternalReference::store_buffer_overflow_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 690 | argument_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 691 | if (save_doubles()) { |
| 692 | __ RestoreFPRegs(sp, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 693 | } |
| 694 | __ ldm(ia_w, sp, kCallerSaved | pc.bit()); // Also pop pc to get Ret(0). |
| 695 | } |
| 696 | |
| 697 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 698 | void MathPowStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 699 | const Register base = r1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 700 | const Register exponent = MathPowTaggedDescriptor::exponent(); |
| 701 | DCHECK(exponent.is(r2)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 702 | const Register heapnumbermap = r5; |
| 703 | const Register heapnumber = r0; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 704 | const DwVfpRegister double_base = d0; |
| 705 | const DwVfpRegister double_exponent = d1; |
| 706 | const DwVfpRegister double_result = d2; |
| 707 | const DwVfpRegister double_scratch = d3; |
| 708 | const SwVfpRegister single_scratch = s6; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 709 | const Register scratch = r9; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 710 | const Register scratch2 = r4; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 711 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 712 | Label call_runtime, done, int_exponent; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 713 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 714 | Label base_is_smi, unpack_exponent; |
| 715 | // The exponent and base are supplied as arguments on the stack. |
| 716 | // This can only happen if the stub is called from non-optimized code. |
| 717 | // Load input parameters from stack to double registers. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 718 | __ ldr(base, MemOperand(sp, 1 * kPointerSize)); |
| 719 | __ ldr(exponent, MemOperand(sp, 0 * kPointerSize)); |
| 720 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 721 | __ LoadRoot(heapnumbermap, Heap::kHeapNumberMapRootIndex); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 722 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 723 | __ UntagAndJumpIfSmi(scratch, base, &base_is_smi); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 724 | __ ldr(scratch, FieldMemOperand(base, JSObject::kMapOffset)); |
| 725 | __ cmp(scratch, heapnumbermap); |
| 726 | __ b(ne, &call_runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 727 | |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 728 | __ vldr(double_base, FieldMemOperand(base, HeapNumber::kValueOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 729 | __ jmp(&unpack_exponent); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 730 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 731 | __ bind(&base_is_smi); |
| 732 | __ vmov(single_scratch, scratch); |
| 733 | __ vcvt_f64_s32(double_base, single_scratch); |
| 734 | __ bind(&unpack_exponent); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 735 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 736 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 737 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 738 | __ ldr(scratch, FieldMemOperand(exponent, JSObject::kMapOffset)); |
| 739 | __ cmp(scratch, heapnumbermap); |
| 740 | __ b(ne, &call_runtime); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 741 | __ vldr(double_exponent, |
| 742 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 743 | } else if (exponent_type() == TAGGED) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 744 | // Base is already in double_base. |
| 745 | __ UntagAndJumpIfSmi(scratch, exponent, &int_exponent); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 746 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 747 | __ vldr(double_exponent, |
| 748 | FieldMemOperand(exponent, HeapNumber::kValueOffset)); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 749 | } |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 750 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 751 | if (exponent_type() != INTEGER) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 752 | Label int_exponent_convert; |
| 753 | // Detect integer exponents stored as double. |
| 754 | __ vcvt_u32_f64(single_scratch, double_exponent); |
| 755 | // We do not check for NaN or Infinity here because comparing numbers on |
| 756 | // ARM correctly distinguishes NaNs. We end up calling the built-in. |
| 757 | __ vcvt_f64_u32(double_scratch, single_scratch); |
| 758 | __ VFPCompareAndSetFlags(double_scratch, double_exponent); |
| 759 | __ b(eq, &int_exponent_convert); |
| 760 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 761 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 762 | // Detect square root case. Crankshaft detects constant +/-0.5 at |
| 763 | // compile time and uses DoMathPowHalf instead. We then skip this check |
| 764 | // for non-constant cases of +/-0.5 as these hardly occur. |
| 765 | Label not_plus_half; |
| 766 | |
| 767 | // Test for 0.5. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 768 | __ vmov(double_scratch, 0.5, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 769 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 770 | __ b(ne, ¬_plus_half); |
| 771 | |
| 772 | // Calculates square root of base. Check for the special case of |
| 773 | // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 774 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 775 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 776 | __ vneg(double_result, double_scratch, eq); |
| 777 | __ b(eq, &done); |
| 778 | |
| 779 | // Add +0 to convert -0 to +0. |
| 780 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
| 781 | __ vsqrt(double_result, double_scratch); |
| 782 | __ jmp(&done); |
| 783 | |
| 784 | __ bind(¬_plus_half); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 785 | __ vmov(double_scratch, -0.5, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 786 | __ VFPCompareAndSetFlags(double_exponent, double_scratch); |
| 787 | __ b(ne, &call_runtime); |
| 788 | |
| 789 | // Calculates square root of base. Check for the special case of |
| 790 | // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 791 | __ vmov(double_scratch, -V8_INFINITY, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 792 | __ VFPCompareAndSetFlags(double_base, double_scratch); |
| 793 | __ vmov(double_result, kDoubleRegZero, eq); |
| 794 | __ b(eq, &done); |
| 795 | |
| 796 | // Add +0 to convert -0 to +0. |
| 797 | __ vadd(double_scratch, double_base, kDoubleRegZero); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 798 | __ vmov(double_result, 1.0, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 799 | __ vsqrt(double_scratch, double_scratch); |
| 800 | __ vdiv(double_result, double_result, double_scratch); |
| 801 | __ jmp(&done); |
| 802 | } |
| 803 | |
| 804 | __ push(lr); |
| 805 | { |
| 806 | AllowExternalCallThatCantCauseGC scope(masm); |
| 807 | __ PrepareCallCFunction(0, 2, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 808 | __ MovToFloatParameters(double_base, double_exponent); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 809 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 810 | ExternalReference::power_double_double_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 811 | 0, 2); |
| 812 | } |
| 813 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 814 | __ MovFromFloatResult(double_result); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 815 | __ jmp(&done); |
| 816 | |
| 817 | __ bind(&int_exponent_convert); |
| 818 | __ vcvt_u32_f64(single_scratch, double_exponent); |
| 819 | __ vmov(scratch, single_scratch); |
| 820 | } |
| 821 | |
| 822 | // Calculate power with integer exponent. |
| 823 | __ bind(&int_exponent); |
| 824 | |
| 825 | // Get two copies of exponent in the registers scratch and exponent. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 826 | if (exponent_type() == INTEGER) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 827 | __ mov(scratch, exponent); |
| 828 | } else { |
| 829 | // Exponent has previously been stored into scratch as untagged integer. |
| 830 | __ mov(exponent, scratch); |
| 831 | } |
| 832 | __ vmov(double_scratch, double_base); // Back up base. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 833 | __ vmov(double_result, 1.0, scratch2); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 834 | |
| 835 | // Get absolute value of exponent. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 836 | __ cmp(scratch, Operand::Zero()); |
| 837 | __ mov(scratch2, Operand::Zero(), LeaveCC, mi); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 838 | __ sub(scratch, scratch2, scratch, LeaveCC, mi); |
| 839 | |
| 840 | Label while_true; |
| 841 | __ bind(&while_true); |
| 842 | __ mov(scratch, Operand(scratch, ASR, 1), SetCC); |
| 843 | __ vmul(double_result, double_result, double_scratch, cs); |
| 844 | __ vmul(double_scratch, double_scratch, double_scratch, ne); |
| 845 | __ b(ne, &while_true); |
| 846 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 847 | __ cmp(exponent, Operand::Zero()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 848 | __ b(ge, &done); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 849 | __ vmov(double_scratch, 1.0, scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 850 | __ vdiv(double_result, double_scratch, double_result); |
| 851 | // Test whether result is zero. Bail out to check for subnormal result. |
| 852 | // Due to subnormals, x^-y == (1/x)^y does not hold in all cases. |
| 853 | __ VFPCompareAndSetFlags(double_result, 0.0); |
| 854 | __ b(ne, &done); |
| 855 | // double_exponent may not containe the exponent value if the input was a |
| 856 | // smi. We set it with exponent value before bailing out. |
| 857 | __ vmov(single_scratch, exponent); |
| 858 | __ vcvt_f64_s32(double_exponent, single_scratch); |
| 859 | |
| 860 | // Returning or bailing out. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 861 | if (exponent_type() == ON_STACK) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 862 | // The arguments are still on the stack. |
| 863 | __ bind(&call_runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 864 | __ TailCallRuntime(Runtime::kMathPowRT); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 865 | |
| 866 | // The stub is called from non-optimized code, which expects the result |
| 867 | // as heap number in exponent. |
| 868 | __ bind(&done); |
| 869 | __ AllocateHeapNumber( |
| 870 | heapnumber, scratch, scratch2, heapnumbermap, &call_runtime); |
| 871 | __ vstr(double_result, |
| 872 | FieldMemOperand(heapnumber, HeapNumber::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 873 | DCHECK(heapnumber.is(r0)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 874 | __ Ret(2); |
| 875 | } else { |
| 876 | __ push(lr); |
| 877 | { |
| 878 | AllowExternalCallThatCantCauseGC scope(masm); |
| 879 | __ PrepareCallCFunction(0, 2, scratch); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 880 | __ MovToFloatParameters(double_base, double_exponent); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 881 | __ CallCFunction( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 882 | ExternalReference::power_double_double_function(isolate()), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 883 | 0, 2); |
| 884 | } |
| 885 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 886 | __ MovFromFloatResult(double_result); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 887 | |
| 888 | __ bind(&done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 889 | __ Ret(); |
| 890 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | |
| 894 | bool CEntryStub::NeedsImmovableCode() { |
| 895 | return true; |
| 896 | } |
| 897 | |
| 898 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 899 | void CodeStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
| 900 | CEntryStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 901 | StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(isolate); |
| 902 | StubFailureTrampolineStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 903 | CommonArrayConstructorStub::GenerateStubsAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 904 | CreateAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 905 | CreateWeakCellStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 906 | BinaryOpICStub::GenerateAheadOfTime(isolate); |
| 907 | BinaryOpICWithAllocationSiteStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 908 | StoreFastElementStub::GenerateAheadOfTime(isolate); |
| 909 | TypeofStub::GenerateAheadOfTime(isolate); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 910 | } |
| 911 | |
| 912 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 913 | void CodeStub::GenerateFPStubs(Isolate* isolate) { |
| 914 | // Generate if not already in cache. |
| 915 | SaveFPRegsMode mode = kSaveFPRegs; |
| 916 | CEntryStub(isolate, 1, mode).GetCode(); |
| 917 | StoreBufferOverflowStub(isolate, mode).GetCode(); |
| 918 | isolate->set_fp_stubs_generated(true); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 922 | void CEntryStub::GenerateAheadOfTime(Isolate* isolate) { |
| 923 | CEntryStub stub(isolate, 1, kDontSaveFPRegs); |
| 924 | stub.GetCode(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 928 | void CEntryStub::Generate(MacroAssembler* masm) { |
| 929 | // Called from JavaScript; parameters are on stack as if calling JS function. |
| 930 | // r0: number of arguments including receiver |
| 931 | // r1: pointer to builtin function |
| 932 | // fp: frame pointer (restored after C call) |
| 933 | // sp: stack pointer (restored as callee's sp after C call) |
| 934 | // cp: current context (C callee-saved) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 935 | // |
| 936 | // If argv_in_register(): |
| 937 | // r2: pointer to the first argument |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 938 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 939 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 940 | __ mov(r5, Operand(r1)); |
| 941 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 942 | if (argv_in_register()) { |
| 943 | // Move argv into the correct register. |
| 944 | __ mov(r1, Operand(r2)); |
| 945 | } else { |
| 946 | // Compute the argv pointer in a callee-saved register. |
| 947 | __ add(r1, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 948 | __ sub(r1, r1, Operand(kPointerSize)); |
| 949 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 950 | |
| 951 | // Enter the exit frame that transitions from JavaScript to C++. |
| 952 | FrameScope scope(masm, StackFrame::MANUAL); |
| 953 | __ EnterExitFrame(save_doubles()); |
| 954 | |
| 955 | // Store a copy of argc in callee-saved registers for later. |
| 956 | __ mov(r4, Operand(r0)); |
| 957 | |
| 958 | // r0, r4: number of arguments including receiver (C callee-saved) |
| 959 | // r1: pointer to the first argument (C callee-saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 960 | // r5: pointer to builtin function (C callee-saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 961 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 962 | int frame_alignment = MacroAssembler::ActivationFrameAlignment(); |
| 963 | int frame_alignment_mask = frame_alignment - 1; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 964 | #if V8_HOST_ARCH_ARM |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 965 | if (FLAG_debug_code) { |
| 966 | if (frame_alignment > kPointerSize) { |
| 967 | Label alignment_as_expected; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 968 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 969 | __ tst(sp, Operand(frame_alignment_mask)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 970 | __ b(eq, &alignment_as_expected); |
| 971 | // Don't use Check here, as it will call Runtime_Abort re-entering here. |
| 972 | __ stop("Unexpected alignment"); |
| 973 | __ bind(&alignment_as_expected); |
| 974 | } |
| 975 | } |
| 976 | #endif |
| 977 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 978 | // Call C built-in. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 979 | int result_stack_size; |
| 980 | if (result_size() <= 2) { |
| 981 | // r0 = argc, r1 = argv, r2 = isolate |
| 982 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 983 | result_stack_size = 0; |
| 984 | } else { |
| 985 | DCHECK_EQ(3, result_size()); |
| 986 | // Allocate additional space for the result. |
| 987 | result_stack_size = |
| 988 | ((result_size() * kPointerSize) + frame_alignment_mask) & |
| 989 | ~frame_alignment_mask; |
| 990 | __ sub(sp, sp, Operand(result_stack_size)); |
| 991 | |
| 992 | // r0 = hidden result argument, r1 = argc, r2 = argv, r3 = isolate. |
| 993 | __ mov(r3, Operand(ExternalReference::isolate_address(isolate()))); |
| 994 | __ mov(r2, Operand(r1)); |
| 995 | __ mov(r1, Operand(r0)); |
| 996 | __ mov(r0, Operand(sp)); |
| 997 | } |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 998 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 999 | // To let the GC traverse the return address of the exit frames, we need to |
| 1000 | // know where the return address is. The CEntryStub is unmovable, so |
| 1001 | // we can store the address on the stack to be able to find it again and |
| 1002 | // we never have to restore it, because it will not change. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1003 | // Compute the return address in lr to return to after the jump below. Pc is |
| 1004 | // already at '+ 8' from the current instruction but return is after three |
| 1005 | // instructions so add another 4 to pc to get the return address. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1006 | { |
| 1007 | // Prevent literal pool emission before return address. |
| 1008 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1009 | __ add(lr, pc, Operand(4)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1010 | __ str(lr, MemOperand(sp, result_stack_size)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1011 | __ Call(r5); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1012 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1013 | if (result_size() > 2) { |
| 1014 | DCHECK_EQ(3, result_size()); |
| 1015 | // Read result values stored on stack. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 1016 | __ ldr(r2, MemOperand(sp, 2 * kPointerSize)); |
| 1017 | __ ldr(r1, MemOperand(sp, 1 * kPointerSize)); |
| 1018 | __ ldr(r0, MemOperand(sp, 0 * kPointerSize)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1019 | } |
| 1020 | // Result returned in r0, r1:r0 or r2:r1:r0 - do not destroy these registers! |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1021 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1022 | // Check result for exception sentinel. |
| 1023 | Label exception_returned; |
| 1024 | __ CompareRoot(r0, Heap::kExceptionRootIndex); |
| 1025 | __ b(eq, &exception_returned); |
| 1026 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1027 | // Check that there is no pending exception, otherwise we |
| 1028 | // should have returned the exception sentinel. |
| 1029 | if (FLAG_debug_code) { |
| 1030 | Label okay; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1031 | ExternalReference pending_exception_address( |
| 1032 | Isolate::kPendingExceptionAddress, isolate()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1033 | __ mov(r3, Operand(pending_exception_address)); |
| 1034 | __ ldr(r3, MemOperand(r3)); |
| 1035 | __ CompareRoot(r3, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1036 | // Cannot use check here as it attempts to generate call into runtime. |
| 1037 | __ b(eq, &okay); |
| 1038 | __ stop("Unexpected pending exception"); |
| 1039 | __ bind(&okay); |
| 1040 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1041 | |
| 1042 | // Exit C frame and return. |
| 1043 | // r0:r1: result |
| 1044 | // sp: stack pointer |
| 1045 | // fp: frame pointer |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1046 | Register argc; |
| 1047 | if (argv_in_register()) { |
| 1048 | // We don't want to pop arguments so set argc to no_reg. |
| 1049 | argc = no_reg; |
| 1050 | } else { |
| 1051 | // Callee-saved register r4 still holds argc. |
| 1052 | argc = r4; |
| 1053 | } |
| 1054 | __ LeaveExitFrame(save_doubles(), argc, true); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1055 | __ mov(pc, lr); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1056 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1057 | // Handling of exception. |
| 1058 | __ bind(&exception_returned); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1059 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1060 | ExternalReference pending_handler_context_address( |
| 1061 | Isolate::kPendingHandlerContextAddress, isolate()); |
| 1062 | ExternalReference pending_handler_code_address( |
| 1063 | Isolate::kPendingHandlerCodeAddress, isolate()); |
| 1064 | ExternalReference pending_handler_offset_address( |
| 1065 | Isolate::kPendingHandlerOffsetAddress, isolate()); |
| 1066 | ExternalReference pending_handler_fp_address( |
| 1067 | Isolate::kPendingHandlerFPAddress, isolate()); |
| 1068 | ExternalReference pending_handler_sp_address( |
| 1069 | Isolate::kPendingHandlerSPAddress, isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1070 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1071 | // Ask the runtime for help to determine the handler. This will set r0 to |
| 1072 | // contain the current pending exception, don't clobber it. |
| 1073 | ExternalReference find_handler(Runtime::kUnwindAndFindExceptionHandler, |
| 1074 | isolate()); |
| 1075 | { |
| 1076 | FrameScope scope(masm, StackFrame::MANUAL); |
| 1077 | __ PrepareCallCFunction(3, 0, r0); |
| 1078 | __ mov(r0, Operand(0)); |
| 1079 | __ mov(r1, Operand(0)); |
| 1080 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 1081 | __ CallCFunction(find_handler, 3); |
| 1082 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1083 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1084 | // Retrieve the handler context, SP and FP. |
| 1085 | __ mov(cp, Operand(pending_handler_context_address)); |
| 1086 | __ ldr(cp, MemOperand(cp)); |
| 1087 | __ mov(sp, Operand(pending_handler_sp_address)); |
| 1088 | __ ldr(sp, MemOperand(sp)); |
| 1089 | __ mov(fp, Operand(pending_handler_fp_address)); |
| 1090 | __ ldr(fp, MemOperand(fp)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1091 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1092 | // If the handler is a JS frame, restore the context to the frame. Note that |
| 1093 | // the context will be set to (cp == 0) for non-JS frames. |
| 1094 | __ cmp(cp, Operand(0)); |
| 1095 | __ str(cp, MemOperand(fp, StandardFrameConstants::kContextOffset), ne); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1096 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1097 | // Compute the handler entry address and jump to it. |
| 1098 | ConstantPoolUnavailableScope constant_pool_unavailable(masm); |
| 1099 | __ mov(r1, Operand(pending_handler_code_address)); |
| 1100 | __ ldr(r1, MemOperand(r1)); |
| 1101 | __ mov(r2, Operand(pending_handler_offset_address)); |
| 1102 | __ ldr(r2, MemOperand(r2)); |
| 1103 | __ add(r1, r1, Operand(Code::kHeaderSize - kHeapObjectTag)); // Code start |
| 1104 | if (FLAG_enable_embedded_constant_pool) { |
| 1105 | __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r1); |
| 1106 | } |
| 1107 | __ add(pc, r1, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1111 | void JSEntryStub::Generate(MacroAssembler* masm) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1112 | // r0: code entry |
| 1113 | // r1: function |
| 1114 | // r2: receiver |
| 1115 | // r3: argc |
| 1116 | // [sp+0]: argv |
| 1117 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1118 | Label invoke, handler_entry, exit; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1119 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1120 | ProfileEntryHookStub::MaybeCallEntryHook(masm); |
| 1121 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1122 | // Called from C, so do not pop argc and args on exit (preserve sp) |
| 1123 | // No need to save register-passed args |
| 1124 | // Save callee-saved registers (incl. cp and fp), sp, and lr |
| 1125 | __ stm(db_w, sp, kCalleeSaved | lr.bit()); |
| 1126 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1127 | // Save callee-saved vfp registers. |
| 1128 | __ vstm(db_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
| 1129 | // Set up the reserved register for 0.0. |
| 1130 | __ vmov(kDoubleRegZero, 0.0); |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1131 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1132 | // Get address of argv, see stm above. |
| 1133 | // r0: code entry |
| 1134 | // r1: function |
| 1135 | // r2: receiver |
| 1136 | // r3: argc |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1137 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1138 | // Set up argv in r4. |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1139 | int offset_to_argv = (kNumCalleeSaved + 1) * kPointerSize; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1140 | offset_to_argv += kNumDoubleCalleeSaved * kDoubleSize; |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1141 | __ ldr(r4, MemOperand(sp, offset_to_argv)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1142 | |
| 1143 | // Push a frame with special values setup to mark it as an entry frame. |
| 1144 | // r0: code entry |
| 1145 | // r1: function |
| 1146 | // r2: receiver |
| 1147 | // r3: argc |
| 1148 | // r4: argv |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1149 | int marker = type(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1150 | if (FLAG_enable_embedded_constant_pool) { |
| 1151 | __ mov(r8, Operand::Zero()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1152 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1153 | __ mov(r7, Operand(Smi::FromInt(marker))); |
| 1154 | __ mov(r6, Operand(Smi::FromInt(marker))); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1155 | __ mov(r5, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1156 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1157 | __ ldr(r5, MemOperand(r5)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1158 | __ mov(ip, Operand(-1)); // Push a bad frame pointer to fail if it is used. |
| 1159 | __ stm(db_w, sp, r5.bit() | r6.bit() | r7.bit() | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1160 | (FLAG_enable_embedded_constant_pool ? r8.bit() : 0) | |
| 1161 | ip.bit()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1162 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1163 | // Set up frame pointer for the frame to be pushed. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1164 | __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 1165 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1166 | // If this is the outermost JS call, set js_entry_sp value. |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1167 | Label non_outermost_js; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1168 | ExternalReference js_entry_sp(Isolate::kJSEntrySPAddress, isolate()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1169 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 1170 | __ ldr(r6, MemOperand(r5)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1171 | __ cmp(r6, Operand::Zero()); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1172 | __ b(ne, &non_outermost_js); |
| 1173 | __ str(fp, MemOperand(r5)); |
| 1174 | __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 1175 | Label cont; |
| 1176 | __ b(&cont); |
| 1177 | __ bind(&non_outermost_js); |
| 1178 | __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
| 1179 | __ bind(&cont); |
| 1180 | __ push(ip); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1181 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1182 | // Jump to a faked try block that does the invoke, with a faked catch |
| 1183 | // block that sets the pending exception. |
| 1184 | __ jmp(&invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1185 | |
| 1186 | // Block literal pool emission whilst taking the position of the handler |
| 1187 | // entry. This avoids making the assumption that literal pools are always |
| 1188 | // emitted after an instruction is emitted, rather than before. |
| 1189 | { |
| 1190 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 1191 | __ bind(&handler_entry); |
| 1192 | handler_offset_ = handler_entry.pos(); |
| 1193 | // Caught exception: Store result (exception) in the pending exception |
| 1194 | // 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] | 1195 | // 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] | 1196 | // signal the existence of the JSEntry frame. |
| 1197 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
| 1198 | isolate()))); |
| 1199 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1200 | __ str(r0, MemOperand(ip)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1201 | __ LoadRoot(r0, Heap::kExceptionRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1202 | __ b(&exit); |
| 1203 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1204 | // Invoke: Link this frame into the handler chain. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1205 | __ bind(&invoke); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1206 | // Must preserve r0-r4, r5-r6 are available. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1207 | __ PushStackHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1208 | // If an exception not caught by another handler occurs, this handler |
| 1209 | // returns control to the code after the bl(&invoke) above, which |
| 1210 | // restores all kCalleeSaved registers (including cp and fp) to their |
| 1211 | // saved values before returning a failure to C. |
| 1212 | |
| 1213 | // Clear any pending exceptions. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1214 | __ mov(r5, Operand(isolate()->factory()->the_hole_value())); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1215 | __ mov(ip, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1216 | isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1217 | __ str(r5, MemOperand(ip)); |
| 1218 | |
| 1219 | // Invoke the function by calling through JS entry trampoline builtin. |
| 1220 | // Notice that we cannot store a reference to the trampoline code directly in |
| 1221 | // this stub, because runtime stubs are not traversed when doing GC. |
| 1222 | |
| 1223 | // Expected registers by Builtins::JSEntryTrampoline |
| 1224 | // r0: code entry |
| 1225 | // r1: function |
| 1226 | // r2: receiver |
| 1227 | // r3: argc |
| 1228 | // r4: argv |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1229 | if (type() == StackFrame::ENTRY_CONSTRUCT) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1230 | ExternalReference construct_entry(Builtins::kJSConstructEntryTrampoline, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1231 | isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1232 | __ mov(ip, Operand(construct_entry)); |
| 1233 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1234 | ExternalReference entry(Builtins::kJSEntryTrampoline, isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1235 | __ mov(ip, Operand(entry)); |
| 1236 | } |
| 1237 | __ ldr(ip, MemOperand(ip)); // deref address |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1238 | __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1239 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1240 | // Branch and link to JSEntryTrampoline. |
| 1241 | __ Call(ip); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1242 | |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1243 | // Unlink this frame from the handler chain. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1244 | __ PopStackHandler(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1245 | |
| 1246 | __ bind(&exit); // r0 holds result |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1247 | // Check if the current stack frame is marked as the outermost JS frame. |
| 1248 | Label non_outermost_js_2; |
| 1249 | __ pop(r5); |
| 1250 | __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
| 1251 | __ b(ne, &non_outermost_js_2); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1252 | __ mov(r6, Operand::Zero()); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1253 | __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
| 1254 | __ str(r6, MemOperand(r5)); |
| 1255 | __ bind(&non_outermost_js_2); |
Steve Block | 053d10c | 2011-06-13 19:13:29 +0100 | [diff] [blame] | 1256 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1257 | // Restore the top frame descriptors from the stack. |
| 1258 | __ pop(r3); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1259 | __ mov(ip, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1260 | Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1261 | __ str(r3, MemOperand(ip)); |
| 1262 | |
| 1263 | // Reset the stack to the callee saved registers. |
| 1264 | __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
| 1265 | |
| 1266 | // Restore callee-saved registers and return. |
| 1267 | #ifdef DEBUG |
| 1268 | if (FLAG_debug_code) { |
| 1269 | __ mov(lr, Operand(pc)); |
| 1270 | } |
| 1271 | #endif |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1272 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1273 | // Restore callee-saved vfp registers. |
| 1274 | __ vldm(ia_w, sp, kFirstCalleeSavedDoubleReg, kLastCalleeSavedDoubleReg); |
Ben Murdoch | 7d3e7fc | 2011-07-12 16:37:06 +0100 | [diff] [blame] | 1275 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1276 | __ ldm(ia_w, sp, kCalleeSaved | pc.bit()); |
| 1277 | } |
| 1278 | |
| 1279 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1280 | void FunctionPrototypeStub::Generate(MacroAssembler* masm) { |
| 1281 | Label miss; |
| 1282 | Register receiver = LoadDescriptor::ReceiverRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1283 | // Ensure that the vector and slot registers won't be clobbered before |
| 1284 | // calling the miss handler. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1285 | DCHECK(!AreAliased(r4, r5, LoadWithVectorDescriptor::VectorRegister(), |
| 1286 | LoadWithVectorDescriptor::SlotRegister())); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1287 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1288 | NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, r4, |
| 1289 | r5, &miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1290 | __ bind(&miss); |
| 1291 | PropertyAccessCompiler::TailCallBuiltin( |
| 1292 | masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC)); |
| 1293 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1294 | |
| 1295 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1296 | void LoadIndexedStringStub::Generate(MacroAssembler* masm) { |
| 1297 | // Return address is in lr. |
| 1298 | Label miss; |
| 1299 | |
| 1300 | Register receiver = LoadDescriptor::ReceiverRegister(); |
| 1301 | Register index = LoadDescriptor::NameRegister(); |
| 1302 | Register scratch = r5; |
| 1303 | Register result = r0; |
| 1304 | DCHECK(!scratch.is(receiver) && !scratch.is(index)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1305 | DCHECK(!scratch.is(LoadWithVectorDescriptor::VectorRegister()) && |
| 1306 | result.is(LoadWithVectorDescriptor::SlotRegister())); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1307 | |
| 1308 | // StringCharAtGenerator doesn't use the result register until it's passed |
| 1309 | // the different miss possibilities. If it did, we would have a conflict |
| 1310 | // when FLAG_vector_ics is true. |
| 1311 | StringCharAtGenerator char_at_generator(receiver, index, scratch, result, |
| 1312 | &miss, // When not a string. |
| 1313 | &miss, // When not a number. |
| 1314 | &miss, // When index out of range. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1315 | RECEIVER_IS_STRING); |
| 1316 | char_at_generator.GenerateFast(masm); |
| 1317 | __ Ret(); |
| 1318 | |
| 1319 | StubRuntimeCallHelper call_helper; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1320 | char_at_generator.GenerateSlow(masm, PART_OF_IC_HANDLER, call_helper); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1321 | |
| 1322 | __ bind(&miss); |
| 1323 | PropertyAccessCompiler::TailCallBuiltin( |
| 1324 | masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC)); |
| 1325 | } |
| 1326 | |
| 1327 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1328 | void RegExpExecStub::Generate(MacroAssembler* masm) { |
| 1329 | // Just jump directly to runtime if native RegExp is not selected at compile |
| 1330 | // time or if regexp entry in generated code is turned off runtime switch or |
| 1331 | // at compilation. |
| 1332 | #ifdef V8_INTERPRETED_REGEXP |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1333 | __ TailCallRuntime(Runtime::kRegExpExec); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1334 | #else // V8_INTERPRETED_REGEXP |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1335 | |
| 1336 | // Stack frame on entry. |
| 1337 | // sp[0]: last_match_info (expected JSArray) |
| 1338 | // sp[4]: previous index |
| 1339 | // sp[8]: subject string |
| 1340 | // sp[12]: JSRegExp object |
| 1341 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1342 | const int kLastMatchInfoOffset = 0 * kPointerSize; |
| 1343 | const int kPreviousIndexOffset = 1 * kPointerSize; |
| 1344 | const int kSubjectOffset = 2 * kPointerSize; |
| 1345 | const int kJSRegExpOffset = 3 * kPointerSize; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1346 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1347 | Label runtime; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1348 | // Allocation of registers for this function. These are in callee save |
| 1349 | // registers and will be preserved by the call to the native RegExp code, as |
| 1350 | // this code is called using the normal C calling convention. When calling |
| 1351 | // directly from generated code the native RegExp code will not do a GC and |
| 1352 | // therefore the content of these registers are safe to use after the call. |
| 1353 | Register subject = r4; |
| 1354 | Register regexp_data = r5; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1355 | Register last_match_info_elements = no_reg; // will be r6; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1356 | |
| 1357 | // Ensure that a RegExp stack is allocated. |
| 1358 | ExternalReference address_of_regexp_stack_memory_address = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1359 | ExternalReference::address_of_regexp_stack_memory_address(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1360 | ExternalReference address_of_regexp_stack_memory_size = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1361 | ExternalReference::address_of_regexp_stack_memory_size(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1362 | __ mov(r0, Operand(address_of_regexp_stack_memory_size)); |
| 1363 | __ ldr(r0, MemOperand(r0, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1364 | __ cmp(r0, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1365 | __ b(eq, &runtime); |
| 1366 | |
| 1367 | // Check that the first argument is a JSRegExp object. |
| 1368 | __ ldr(r0, MemOperand(sp, kJSRegExpOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1369 | __ JumpIfSmi(r0, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1370 | __ CompareObjectType(r0, r1, r1, JS_REGEXP_TYPE); |
| 1371 | __ b(ne, &runtime); |
| 1372 | |
| 1373 | // Check that the RegExp has been compiled (data contains a fixed array). |
| 1374 | __ ldr(regexp_data, FieldMemOperand(r0, JSRegExp::kDataOffset)); |
| 1375 | if (FLAG_debug_code) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1376 | __ SmiTst(regexp_data); |
| 1377 | __ Check(ne, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1378 | __ CompareObjectType(regexp_data, r0, r0, FIXED_ARRAY_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1379 | __ Check(eq, kUnexpectedTypeForRegExpDataFixedArrayExpected); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1380 | } |
| 1381 | |
| 1382 | // regexp_data: RegExp data (FixedArray) |
| 1383 | // Check the type of the RegExp. Only continue if type is JSRegExp::IRREGEXP. |
| 1384 | __ ldr(r0, FieldMemOperand(regexp_data, JSRegExp::kDataTagOffset)); |
| 1385 | __ cmp(r0, Operand(Smi::FromInt(JSRegExp::IRREGEXP))); |
| 1386 | __ b(ne, &runtime); |
| 1387 | |
| 1388 | // regexp_data: RegExp data (FixedArray) |
| 1389 | // Check that the number of captures fit in the static offsets vector buffer. |
| 1390 | __ ldr(r2, |
| 1391 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1392 | // Check (number_of_captures + 1) * 2 <= offsets vector size |
| 1393 | // Or number_of_captures * 2 <= offsets vector size - 2 |
| 1394 | // Multiplying by 2 comes for free since r2 is smi-tagged. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1395 | STATIC_ASSERT(kSmiTag == 0); |
| 1396 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1397 | STATIC_ASSERT(Isolate::kJSRegexpStaticOffsetsVectorSize >= 2); |
| 1398 | __ cmp(r2, Operand(Isolate::kJSRegexpStaticOffsetsVectorSize - 2)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1399 | __ b(hi, &runtime); |
| 1400 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1401 | // Reset offset for possibly sliced string. |
| 1402 | __ mov(r9, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1403 | __ ldr(subject, MemOperand(sp, kSubjectOffset)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1404 | __ JumpIfSmi(subject, &runtime); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1405 | __ mov(r3, subject); // Make a copy of the original subject string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1406 | // subject: subject string |
| 1407 | // r3: subject string |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1408 | // regexp_data: RegExp data (FixedArray) |
| 1409 | // Handle subject string according to its encoding and representation: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1410 | // (1) Sequential string? If yes, go to (4). |
| 1411 | // (2) Sequential or cons? If not, go to (5). |
| 1412 | // (3) Cons string. If the string is flat, replace subject with first string |
| 1413 | // and go to (1). Otherwise bail out to runtime. |
| 1414 | // (4) Sequential string. Load regexp code according to encoding. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1415 | // (E) Carry on. |
| 1416 | /// [...] |
| 1417 | |
| 1418 | // Deferred code at the end of the stub: |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1419 | // (5) Long external string? If not, go to (7). |
| 1420 | // (6) External string. Make it, offset-wise, look like a sequential string. |
| 1421 | // Go to (4). |
| 1422 | // (7) Short external string or not a string? If yes, bail out to runtime. |
| 1423 | // (8) Sliced string. Replace subject with parent. Go to (1). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1424 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1425 | Label seq_string /* 4 */, external_string /* 6 */, check_underlying /* 1 */, |
| 1426 | not_seq_nor_cons /* 5 */, not_long_external /* 7 */; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1427 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1428 | __ bind(&check_underlying); |
| 1429 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 1430 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 1431 | |
| 1432 | // (1) Sequential string? If yes, go to (4). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1433 | __ and_(r1, |
| 1434 | r0, |
| 1435 | Operand(kIsNotStringMask | |
| 1436 | kStringRepresentationMask | |
| 1437 | kShortExternalStringMask), |
| 1438 | SetCC); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1439 | STATIC_ASSERT((kStringTag | kSeqStringTag) == 0); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1440 | __ b(eq, &seq_string); // Go to (4). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1441 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1442 | // (2) Sequential or cons? If not, go to (5). |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1443 | STATIC_ASSERT(kConsStringTag < kExternalStringTag); |
| 1444 | STATIC_ASSERT(kSlicedStringTag > kExternalStringTag); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1445 | STATIC_ASSERT(kIsNotStringMask > kExternalStringTag); |
| 1446 | STATIC_ASSERT(kShortExternalStringTag > kExternalStringTag); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1447 | __ cmp(r1, Operand(kExternalStringTag)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1448 | __ b(ge, ¬_seq_nor_cons); // Go to (5). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1449 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1450 | // (3) Cons string. Check that it's flat. |
| 1451 | // Replace subject with first string and reload instance type. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1452 | __ ldr(r0, FieldMemOperand(subject, ConsString::kSecondOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1453 | __ CompareRoot(r0, Heap::kempty_stringRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1454 | __ b(ne, &runtime); |
| 1455 | __ ldr(subject, FieldMemOperand(subject, ConsString::kFirstOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1456 | __ jmp(&check_underlying); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1457 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1458 | // (4) Sequential string. Load regexp code according to encoding. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1459 | __ bind(&seq_string); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1460 | // subject: sequential subject string (or look-alike, external string) |
| 1461 | // r3: original subject string |
| 1462 | // Load previous index and check range before r3 is overwritten. We have to |
| 1463 | // use r3 instead of subject here because subject might have been only made |
| 1464 | // to look like a sequential string when it actually is an external string. |
| 1465 | __ ldr(r1, MemOperand(sp, kPreviousIndexOffset)); |
| 1466 | __ JumpIfNotSmi(r1, &runtime); |
| 1467 | __ ldr(r3, FieldMemOperand(r3, String::kLengthOffset)); |
| 1468 | __ cmp(r3, Operand(r1)); |
| 1469 | __ b(ls, &runtime); |
| 1470 | __ SmiUntag(r1); |
| 1471 | |
| 1472 | STATIC_ASSERT(4 == kOneByteStringTag); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1473 | STATIC_ASSERT(kTwoByteStringTag == 0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1474 | __ and_(r0, r0, Operand(kStringEncodingMask)); |
| 1475 | __ mov(r3, Operand(r0, ASR, 2), SetCC); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1476 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataOneByteCodeOffset), |
| 1477 | ne); |
| 1478 | __ ldr(r6, FieldMemOperand(regexp_data, JSRegExp::kDataUC16CodeOffset), eq); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1479 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1480 | // (E) Carry on. String handling is done. |
| 1481 | // r6: irregexp code |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1482 | // Check that the irregexp code has been generated for the actual string |
| 1483 | // 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] | 1484 | // a smi (code flushing support). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1485 | __ JumpIfSmi(r6, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1486 | |
| 1487 | // r1: previous index |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1488 | // r3: encoding of subject string (1 if one_byte, 0 if two_byte); |
| 1489 | // r6: code |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1490 | // subject: Subject string |
| 1491 | // regexp_data: RegExp data (FixedArray) |
| 1492 | // All checks done. Now push arguments for native regexp code. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1493 | __ IncrementCounter(isolate()->counters()->regexp_entry_native(), 1, r0, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1494 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1495 | // Isolates: note we add an additional parameter here (isolate pointer). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1496 | const int kRegExpExecuteArguments = 9; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1497 | const int kParameterRegisters = 4; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1498 | __ EnterExitFrame(false, kRegExpExecuteArguments - kParameterRegisters); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1499 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1500 | // Stack pointer now points to cell where return address is to be written. |
| 1501 | // Arguments are before that on the stack or in registers. |
| 1502 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1503 | // Argument 9 (sp[20]): Pass current isolate address. |
| 1504 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
| 1505 | __ str(r0, MemOperand(sp, 5 * kPointerSize)); |
| 1506 | |
| 1507 | // Argument 8 (sp[16]): Indicate that this is a direct call from JavaScript. |
| 1508 | __ mov(r0, Operand(1)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1509 | __ str(r0, MemOperand(sp, 4 * kPointerSize)); |
| 1510 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1511 | // Argument 7 (sp[12]): Start (high end) of backtracking stack memory area. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1512 | __ mov(r0, Operand(address_of_regexp_stack_memory_address)); |
| 1513 | __ ldr(r0, MemOperand(r0, 0)); |
| 1514 | __ mov(r2, Operand(address_of_regexp_stack_memory_size)); |
| 1515 | __ ldr(r2, MemOperand(r2, 0)); |
| 1516 | __ add(r0, r0, Operand(r2)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1517 | __ str(r0, MemOperand(sp, 3 * kPointerSize)); |
| 1518 | |
| 1519 | // Argument 6: Set the number of capture registers to zero to force global |
| 1520 | // regexps to behave as non-global. This does not affect non-global regexps. |
| 1521 | __ mov(r0, Operand::Zero()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1522 | __ str(r0, MemOperand(sp, 2 * kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1523 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1524 | // Argument 5 (sp[4]): static offsets vector buffer. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1525 | __ mov(r0, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1526 | Operand(ExternalReference::address_of_static_offsets_vector( |
| 1527 | isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1528 | __ str(r0, MemOperand(sp, 1 * kPointerSize)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1529 | |
| 1530 | // 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] | 1531 | // calculate the shift of the index (0 for one-byte and 1 for two-byte). |
| 1532 | __ add(r7, subject, Operand(SeqString::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1533 | __ eor(r3, r3, Operand(1)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1534 | // Load the length from the original subject string from the previous stack |
| 1535 | // frame. Therefore we have to use fp, which points exactly to two pointer |
| 1536 | // sizes below the previous sp. (Because creating a new stack frame pushes |
| 1537 | // 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] | 1538 | __ ldr(subject, MemOperand(fp, kSubjectOffset + 2 * kPointerSize)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1539 | // If slice offset is not 0, load the length from the original sliced string. |
| 1540 | // Argument 4, r3: End of string data |
| 1541 | // Argument 3, r2: Start of string data |
| 1542 | // Prepare start and end index of the input. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1543 | __ add(r9, r7, Operand(r9, LSL, r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1544 | __ add(r2, r9, Operand(r1, LSL, r3)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1545 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1546 | __ ldr(r7, FieldMemOperand(subject, String::kLengthOffset)); |
| 1547 | __ SmiUntag(r7); |
| 1548 | __ add(r3, r9, Operand(r7, LSL, r3)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1549 | |
| 1550 | // Argument 2 (r1): Previous index. |
| 1551 | // Already there |
| 1552 | |
| 1553 | // Argument 1 (r0): Subject string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1554 | __ mov(r0, subject); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1555 | |
| 1556 | // Locate the code entry and call it. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1557 | __ add(r6, r6, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 1558 | DirectCEntryStub stub(isolate()); |
| 1559 | stub.GenerateCall(masm, r6); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1560 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1561 | __ LeaveExitFrame(false, no_reg, true); |
| 1562 | |
| 1563 | last_match_info_elements = r6; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1564 | |
| 1565 | // r0: result |
| 1566 | // subject: subject string (callee saved) |
| 1567 | // regexp_data: RegExp data (callee saved) |
| 1568 | // last_match_info_elements: Last match info elements (callee saved) |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1569 | // Check the result. |
| 1570 | Label success; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1571 | __ cmp(r0, Operand(1)); |
| 1572 | // We expect exactly one result since we force the called regexp to behave |
| 1573 | // as non-global. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1574 | __ b(eq, &success); |
| 1575 | Label failure; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1576 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::FAILURE)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1577 | __ b(eq, &failure); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1578 | __ cmp(r0, Operand(NativeRegExpMacroAssembler::EXCEPTION)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1579 | // If not exception it can only be retry. Handle that in the runtime system. |
| 1580 | __ b(ne, &runtime); |
| 1581 | // Result must now be exception. If there is no pending exception already a |
| 1582 | // stack overflow (on the backtrack stack) was detected in RegExp code but |
| 1583 | // haven't created the exception yet. Handle that in the runtime system. |
| 1584 | // TODO(592): Rerunning the RegExp to get the stack overflow exception. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1585 | __ mov(r1, Operand(isolate()->factory()->the_hole_value())); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1586 | __ mov(r2, Operand(ExternalReference(Isolate::kPendingExceptionAddress, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1587 | isolate()))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1588 | __ ldr(r0, MemOperand(r2, 0)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1589 | __ cmp(r0, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1590 | __ b(eq, &runtime); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1591 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1592 | // For exception, throw the exception again. |
| 1593 | __ TailCallRuntime(Runtime::kRegExpExecReThrow); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1594 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1595 | __ bind(&failure); |
| 1596 | // For failure and exception return null. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1597 | __ mov(r0, Operand(isolate()->factory()->null_value())); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1598 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 1599 | __ Ret(); |
| 1600 | |
| 1601 | // Process the result from the native regexp code. |
| 1602 | __ bind(&success); |
| 1603 | __ ldr(r1, |
| 1604 | FieldMemOperand(regexp_data, JSRegExp::kIrregexpCaptureCountOffset)); |
| 1605 | // Calculate number of capture registers (number_of_captures + 1) * 2. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1606 | // Multiplying by 2 comes for free since r1 is smi-tagged. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1607 | STATIC_ASSERT(kSmiTag == 0); |
| 1608 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
| 1609 | __ add(r1, r1, Operand(2)); // r1 was a smi. |
| 1610 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1611 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 1612 | __ JumpIfSmi(r0, &runtime); |
| 1613 | __ CompareObjectType(r0, r2, r2, JS_ARRAY_TYPE); |
| 1614 | __ b(ne, &runtime); |
| 1615 | // Check that the JSArray is in fast case. |
| 1616 | __ ldr(last_match_info_elements, |
| 1617 | FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 1618 | __ ldr(r0, FieldMemOperand(last_match_info_elements, HeapObject::kMapOffset)); |
| 1619 | __ CompareRoot(r0, Heap::kFixedArrayMapRootIndex); |
| 1620 | __ b(ne, &runtime); |
| 1621 | // Check that the last match info has space for the capture registers and the |
| 1622 | // additional information. |
| 1623 | __ ldr(r0, |
| 1624 | FieldMemOperand(last_match_info_elements, FixedArray::kLengthOffset)); |
| 1625 | __ add(r2, r1, Operand(RegExpImpl::kLastMatchOverhead)); |
| 1626 | __ cmp(r2, Operand::SmiUntag(r0)); |
| 1627 | __ b(gt, &runtime); |
| 1628 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1629 | // r1: number of capture registers |
| 1630 | // r4: subject string |
| 1631 | // Store the capture count. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1632 | __ SmiTag(r2, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1633 | __ str(r2, FieldMemOperand(last_match_info_elements, |
| 1634 | RegExpImpl::kLastCaptureCountOffset)); |
| 1635 | // Store last subject and last input. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1636 | __ str(subject, |
| 1637 | FieldMemOperand(last_match_info_elements, |
| 1638 | RegExpImpl::kLastSubjectOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1639 | __ mov(r2, subject); |
| 1640 | __ RecordWriteField(last_match_info_elements, |
| 1641 | RegExpImpl::kLastSubjectOffset, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1642 | subject, |
| 1643 | r3, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1644 | kLRHasNotBeenSaved, |
| 1645 | kDontSaveFPRegs); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1646 | __ mov(subject, r2); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1647 | __ str(subject, |
| 1648 | FieldMemOperand(last_match_info_elements, |
| 1649 | RegExpImpl::kLastInputOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1650 | __ RecordWriteField(last_match_info_elements, |
| 1651 | RegExpImpl::kLastInputOffset, |
| 1652 | subject, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1653 | r3, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1654 | kLRHasNotBeenSaved, |
| 1655 | kDontSaveFPRegs); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1656 | |
| 1657 | // Get the static offsets vector filled by the native regexp code. |
| 1658 | ExternalReference address_of_static_offsets_vector = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1659 | ExternalReference::address_of_static_offsets_vector(isolate()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1660 | __ mov(r2, Operand(address_of_static_offsets_vector)); |
| 1661 | |
| 1662 | // r1: number of capture registers |
| 1663 | // r2: offsets vector |
| 1664 | Label next_capture, done; |
| 1665 | // Capture register counter starts from number of capture registers and |
| 1666 | // counts down until wraping after zero. |
| 1667 | __ add(r0, |
| 1668 | last_match_info_elements, |
| 1669 | Operand(RegExpImpl::kFirstCaptureOffset - kHeapObjectTag)); |
| 1670 | __ bind(&next_capture); |
| 1671 | __ sub(r1, r1, Operand(1), SetCC); |
| 1672 | __ b(mi, &done); |
| 1673 | // Read the value from the static offsets vector buffer. |
| 1674 | __ ldr(r3, MemOperand(r2, kPointerSize, PostIndex)); |
| 1675 | // Store the smi value in the last match info. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1676 | __ SmiTag(r3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1677 | __ str(r3, MemOperand(r0, kPointerSize, PostIndex)); |
| 1678 | __ jmp(&next_capture); |
| 1679 | __ bind(&done); |
| 1680 | |
| 1681 | // Return last match info. |
| 1682 | __ ldr(r0, MemOperand(sp, kLastMatchInfoOffset)); |
| 1683 | __ add(sp, sp, Operand(4 * kPointerSize)); |
| 1684 | __ Ret(); |
| 1685 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1686 | // Do the runtime call to execute the regexp. |
| 1687 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1688 | __ TailCallRuntime(Runtime::kRegExpExec); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1689 | |
| 1690 | // Deferred code for string handling. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1691 | // (5) Long external string? If not, go to (7). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1692 | __ bind(¬_seq_nor_cons); |
| 1693 | // Compare flags are still set. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1694 | __ b(gt, ¬_long_external); // Go to (7). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1695 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1696 | // (6) External string. Make it, offset-wise, look like a sequential string. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1697 | __ bind(&external_string); |
| 1698 | __ ldr(r0, FieldMemOperand(subject, HeapObject::kMapOffset)); |
| 1699 | __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset)); |
| 1700 | if (FLAG_debug_code) { |
| 1701 | // Assert that we do not have a cons or slice (indirect strings) here. |
| 1702 | // Sequential strings have already been ruled out. |
| 1703 | __ tst(r0, Operand(kIsIndirectStringMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1704 | __ Assert(eq, kExternalStringExpectedButNotFound); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1705 | } |
| 1706 | __ ldr(subject, |
| 1707 | FieldMemOperand(subject, ExternalString::kResourceDataOffset)); |
| 1708 | // 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] | 1709 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1710 | __ sub(subject, |
| 1711 | subject, |
| 1712 | Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1713 | __ jmp(&seq_string); // Go to (4). |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1714 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1715 | // (7) Short external string or not a string? If yes, bail out to runtime. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1716 | __ bind(¬_long_external); |
| 1717 | STATIC_ASSERT(kNotStringTag != 0 && kShortExternalStringTag !=0); |
| 1718 | __ tst(r1, Operand(kIsNotStringMask | kShortExternalStringMask)); |
| 1719 | __ b(ne, &runtime); |
| 1720 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1721 | // (8) Sliced string. Replace subject with parent. Go to (4). |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1722 | // Load offset into r9 and replace subject string with parent. |
| 1723 | __ ldr(r9, FieldMemOperand(subject, SlicedString::kOffsetOffset)); |
| 1724 | __ SmiUntag(r9); |
| 1725 | __ ldr(subject, FieldMemOperand(subject, SlicedString::kParentOffset)); |
| 1726 | __ jmp(&check_underlying); // Go to (4). |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 1727 | #endif // V8_INTERPRETED_REGEXP |
| 1728 | } |
| 1729 | |
| 1730 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1731 | static void CallStubInRecordCallTarget(MacroAssembler* masm, CodeStub* stub) { |
| 1732 | // r0 : number of arguments to the construct function |
| 1733 | // r1 : the function to call |
| 1734 | // r2 : feedback vector |
| 1735 | // r3 : slot in feedback vector (Smi) |
| 1736 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 1737 | |
| 1738 | // Number-of-arguments register must be smi-tagged to call out. |
| 1739 | __ SmiTag(r0); |
| 1740 | __ Push(r3, r2, r1, r0); |
| 1741 | |
| 1742 | __ CallStub(stub); |
| 1743 | |
| 1744 | __ Pop(r3, r2, r1, r0); |
| 1745 | __ SmiUntag(r0); |
| 1746 | } |
| 1747 | |
| 1748 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1749 | static void GenerateRecordCallTarget(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1750 | // Cache the called function in a feedback vector slot. Cache states |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1751 | // are uninitialized, monomorphic (indicated by a JSFunction), and |
| 1752 | // megamorphic. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1753 | // r0 : number of arguments to the construct function |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1754 | // r1 : the function to call |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1755 | // r2 : feedback vector |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1756 | // r3 : slot in feedback vector (Smi) |
| 1757 | Label initialize, done, miss, megamorphic, not_array_function; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1758 | Label done_initialize_count, done_increment_count; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1759 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1760 | DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()), |
| 1761 | masm->isolate()->heap()->megamorphic_symbol()); |
| 1762 | DCHECK_EQ(*TypeFeedbackVector::UninitializedSentinel(masm->isolate()), |
| 1763 | masm->isolate()->heap()->uninitialized_symbol()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1764 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1765 | // Load the cache state into r5. |
| 1766 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1767 | __ ldr(r5, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1768 | |
| 1769 | // A monomorphic cache hit or an already megamorphic state: invoke the |
| 1770 | // function without changing the state. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1771 | // We don't know if r5 is a WeakCell or a Symbol, but it's harmless to read at |
| 1772 | // this position in a symbol (see static asserts in type-feedback-vector.h). |
| 1773 | Label check_allocation_site; |
| 1774 | Register feedback_map = r6; |
| 1775 | Register weak_value = r9; |
| 1776 | __ ldr(weak_value, FieldMemOperand(r5, WeakCell::kValueOffset)); |
| 1777 | __ cmp(r1, weak_value); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1778 | __ b(eq, &done_increment_count); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1779 | __ CompareRoot(r5, Heap::kmegamorphic_symbolRootIndex); |
| 1780 | __ b(eq, &done); |
| 1781 | __ ldr(feedback_map, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 1782 | __ CompareRoot(feedback_map, Heap::kWeakCellMapRootIndex); |
| 1783 | __ b(ne, &check_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1784 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1785 | // If the weak cell is cleared, we have a new chance to become monomorphic. |
| 1786 | __ JumpIfSmi(weak_value, &initialize); |
| 1787 | __ jmp(&megamorphic); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1788 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1789 | __ bind(&check_allocation_site); |
| 1790 | // If we came here, we need to see if we are the array function. |
| 1791 | // If we didn't have a matching function, and we didn't find the megamorph |
| 1792 | // sentinel, then we have in the slot either some other function or an |
| 1793 | // AllocationSite. |
| 1794 | __ CompareRoot(feedback_map, Heap::kAllocationSiteMapRootIndex); |
| 1795 | __ b(ne, &miss); |
| 1796 | |
| 1797 | // Make sure the function is the Array() function |
| 1798 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 1799 | __ cmp(r1, r5); |
| 1800 | __ b(ne, &megamorphic); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1801 | __ jmp(&done_increment_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1802 | |
| 1803 | __ bind(&miss); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1804 | |
| 1805 | // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
| 1806 | // megamorphic. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1807 | __ CompareRoot(r5, Heap::kuninitialized_symbolRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1808 | __ b(eq, &initialize); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1809 | // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 1810 | // write-barrier is needed. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1811 | __ bind(&megamorphic); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1812 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1813 | __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1814 | __ str(ip, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1815 | __ jmp(&done); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1816 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1817 | // An uninitialized cache is patched with the function |
| 1818 | __ bind(&initialize); |
| 1819 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1820 | // Make sure the function is the Array() function |
| 1821 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 1822 | __ cmp(r1, r5); |
| 1823 | __ b(ne, ¬_array_function); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1824 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1825 | // The target function is the Array constructor, |
| 1826 | // Create an AllocationSite if we don't already have it, store it in the |
| 1827 | // slot. |
| 1828 | CreateAllocationSiteStub create_stub(masm->isolate()); |
| 1829 | CallStubInRecordCallTarget(masm, &create_stub); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1830 | __ b(&done_initialize_count); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1831 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1832 | __ bind(¬_array_function); |
| 1833 | CreateWeakCellStub weak_cell_stub(masm->isolate()); |
| 1834 | CallStubInRecordCallTarget(masm, &weak_cell_stub); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1835 | |
| 1836 | __ bind(&done_initialize_count); |
| 1837 | // Initialize the call counter. |
| 1838 | __ Move(r5, Operand(Smi::FromInt(1))); |
| 1839 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1840 | __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + kPointerSize)); |
| 1841 | __ b(&done); |
| 1842 | |
| 1843 | __ bind(&done_increment_count); |
| 1844 | |
| 1845 | // Increment the call count for monomorphic function calls. |
| 1846 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1847 | __ add(r5, r5, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 1848 | __ ldr(r4, FieldMemOperand(r5, 0)); |
| 1849 | __ add(r4, r4, Operand(Smi::FromInt(1))); |
| 1850 | __ str(r4, FieldMemOperand(r5, 0)); |
| 1851 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1852 | __ bind(&done); |
| 1853 | } |
| 1854 | |
| 1855 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1856 | void CallConstructStub::Generate(MacroAssembler* masm) { |
| 1857 | // r0 : number of arguments |
| 1858 | // r1 : the function to call |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1859 | // r2 : feedback vector |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1860 | // r3 : slot in feedback vector (Smi, for RecordCallTarget) |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1861 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1862 | Label non_function; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1863 | // Check that the function is not a smi. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1864 | __ JumpIfSmi(r1, &non_function); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1865 | // Check that the function is a JSFunction. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1866 | __ CompareObjectType(r1, r5, r5, JS_FUNCTION_TYPE); |
| 1867 | __ b(ne, &non_function); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1868 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1869 | GenerateRecordCallTarget(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1870 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1871 | __ add(r5, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1872 | Label feedback_register_initialized; |
| 1873 | // Put the AllocationSite from the feedback vector into r2, or undefined. |
| 1874 | __ ldr(r2, FieldMemOperand(r5, FixedArray::kHeaderSize)); |
| 1875 | __ ldr(r5, FieldMemOperand(r2, AllocationSite::kMapOffset)); |
| 1876 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 1877 | __ b(eq, &feedback_register_initialized); |
| 1878 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 1879 | __ bind(&feedback_register_initialized); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1880 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1881 | __ AssertUndefinedOrAllocationSite(r2, r5); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1882 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1883 | // Pass function as new target. |
| 1884 | __ mov(r3, r1); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1885 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1886 | // Tail call to the function-specific construct stub (still in the caller |
| 1887 | // context at this point). |
| 1888 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 1889 | __ ldr(r4, FieldMemOperand(r4, SharedFunctionInfo::kConstructStubOffset)); |
| 1890 | __ add(pc, r4, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1891 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1892 | __ bind(&non_function); |
| 1893 | __ mov(r3, r1); |
| 1894 | __ Jump(isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1895 | } |
| 1896 | |
| 1897 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1898 | void CallICStub::HandleArrayCase(MacroAssembler* masm, Label* miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1899 | // r1 - function |
| 1900 | // r3 - slot id |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1901 | // r2 - vector |
| 1902 | // r4 - allocation site (loaded from vector[slot]) |
| 1903 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r5); |
| 1904 | __ cmp(r1, r5); |
| 1905 | __ b(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1906 | |
| 1907 | __ mov(r0, Operand(arg_count())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1908 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1909 | // Increment the call count for monomorphic function calls. |
| 1910 | __ add(r2, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1911 | __ add(r2, r2, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 1912 | __ ldr(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1913 | __ add(r3, r3, Operand(Smi::FromInt(1))); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1914 | __ str(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1915 | |
| 1916 | __ mov(r2, r4); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1917 | __ mov(r3, r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1918 | ArrayConstructorStub stub(masm->isolate(), arg_count()); |
| 1919 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1920 | } |
| 1921 | |
| 1922 | |
| 1923 | void CallICStub::Generate(MacroAssembler* masm) { |
| 1924 | // r1 - function |
| 1925 | // r3 - slot id (Smi) |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1926 | // r2 - vector |
| 1927 | Label extra_checks_or_miss, call, call_function; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1928 | int argc = arg_count(); |
| 1929 | ParameterCount actual(argc); |
| 1930 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1931 | // The checks. First, does r1 match the recorded monomorphic target? |
| 1932 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1933 | __ ldr(r4, FieldMemOperand(r4, FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1934 | |
| 1935 | // We don't know that we have a weak cell. We might have a private symbol |
| 1936 | // or an AllocationSite, but the memory is safe to examine. |
| 1937 | // AllocationSite::kTransitionInfoOffset - contains a Smi or pointer to |
| 1938 | // FixedArray. |
| 1939 | // WeakCell::kValueOffset - contains a JSFunction or Smi(0) |
| 1940 | // Symbol::kHashFieldSlot - if the low bit is 1, then the hash is not |
| 1941 | // computed, meaning that it can't appear to be a pointer. If the low bit is |
| 1942 | // 0, then hash is computed, but the 0 bit prevents the field from appearing |
| 1943 | // to be a pointer. |
| 1944 | STATIC_ASSERT(WeakCell::kSize >= kPointerSize); |
| 1945 | STATIC_ASSERT(AllocationSite::kTransitionInfoOffset == |
| 1946 | WeakCell::kValueOffset && |
| 1947 | WeakCell::kValueOffset == Symbol::kHashFieldSlot); |
| 1948 | |
| 1949 | __ ldr(r5, FieldMemOperand(r4, WeakCell::kValueOffset)); |
| 1950 | __ cmp(r1, r5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1951 | __ b(ne, &extra_checks_or_miss); |
| 1952 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1953 | // The compare above could have been a SMI/SMI comparison. Guard against this |
| 1954 | // convincing us that we have a monomorphic JSFunction. |
| 1955 | __ JumpIfSmi(r1, &extra_checks_or_miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1956 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1957 | // Increment the call count for monomorphic function calls. |
| 1958 | __ add(r2, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 1959 | __ add(r2, r2, Operand(FixedArray::kHeaderSize + kPointerSize)); |
| 1960 | __ ldr(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 1961 | __ add(r3, r3, Operand(Smi::FromInt(1))); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1962 | __ str(r3, FieldMemOperand(r2, 0)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1963 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1964 | __ bind(&call_function); |
| 1965 | __ mov(r0, Operand(argc)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1966 | __ Jump(masm->isolate()->builtins()->CallFunction(convert_mode(), |
| 1967 | tail_call_mode()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1968 | RelocInfo::CODE_TARGET); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1969 | |
| 1970 | __ bind(&extra_checks_or_miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1971 | Label uninitialized, miss, not_allocation_site; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1972 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1973 | __ CompareRoot(r4, Heap::kmegamorphic_symbolRootIndex); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1974 | __ b(eq, &call); |
| 1975 | |
| 1976 | // Verify that r4 contains an AllocationSite |
| 1977 | __ ldr(r5, FieldMemOperand(r4, HeapObject::kMapOffset)); |
| 1978 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 1979 | __ b(ne, ¬_allocation_site); |
| 1980 | |
| 1981 | // We have an allocation site. |
| 1982 | HandleArrayCase(masm, &miss); |
| 1983 | |
| 1984 | __ bind(¬_allocation_site); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1985 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1986 | // The following cases attempt to handle MISS cases without going to the |
| 1987 | // runtime. |
| 1988 | if (FLAG_trace_ic) { |
| 1989 | __ jmp(&miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1990 | } |
| 1991 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 1992 | __ CompareRoot(r4, Heap::kuninitialized_symbolRootIndex); |
| 1993 | __ b(eq, &uninitialized); |
| 1994 | |
| 1995 | // We are going megamorphic. If the feedback is a JSFunction, it is fine |
| 1996 | // to handle it here. More complex cases are dealt with in the runtime. |
| 1997 | __ AssertNotSmi(r4); |
| 1998 | __ CompareObjectType(r4, r5, r5, JS_FUNCTION_TYPE); |
| 1999 | __ b(ne, &miss); |
| 2000 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
| 2001 | __ LoadRoot(ip, Heap::kmegamorphic_symbolRootIndex); |
| 2002 | __ str(ip, FieldMemOperand(r4, FixedArray::kHeaderSize)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2003 | |
| 2004 | __ bind(&call); |
| 2005 | __ mov(r0, Operand(argc)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2006 | __ Jump(masm->isolate()->builtins()->Call(convert_mode(), tail_call_mode()), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2007 | RelocInfo::CODE_TARGET); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2008 | |
| 2009 | __ bind(&uninitialized); |
| 2010 | |
| 2011 | // We are going monomorphic, provided we actually have a JSFunction. |
| 2012 | __ JumpIfSmi(r1, &miss); |
| 2013 | |
| 2014 | // Goto miss case if we do not have a function. |
| 2015 | __ CompareObjectType(r1, r4, r4, JS_FUNCTION_TYPE); |
| 2016 | __ b(ne, &miss); |
| 2017 | |
| 2018 | // Make sure the function is not the Array() function, which requires special |
| 2019 | // behavior on MISS. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2020 | __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r4); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2021 | __ cmp(r1, r4); |
| 2022 | __ b(eq, &miss); |
| 2023 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2024 | // Make sure the function belongs to the same native context. |
| 2025 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 2026 | __ ldr(r4, ContextMemOperand(r4, Context::NATIVE_CONTEXT_INDEX)); |
| 2027 | __ ldr(ip, NativeContextMemOperand()); |
| 2028 | __ cmp(r4, ip); |
| 2029 | __ b(ne, &miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2030 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2031 | // Initialize the call counter. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2032 | __ Move(r5, Operand(Smi::FromInt(1))); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2033 | __ add(r4, r2, Operand::PointerOffsetFromSmiKey(r3)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2034 | __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + kPointerSize)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2035 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2036 | // Store the function. Use a stub since we need a frame for allocation. |
| 2037 | // r2 - vector |
| 2038 | // r3 - slot |
| 2039 | // r1 - function |
| 2040 | { |
| 2041 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 2042 | CreateWeakCellStub create_stub(masm->isolate()); |
| 2043 | __ Push(r1); |
| 2044 | __ CallStub(&create_stub); |
| 2045 | __ Pop(r1); |
| 2046 | } |
| 2047 | |
| 2048 | __ jmp(&call_function); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2049 | |
| 2050 | // We are here because tracing is on or we encountered a MISS case we can't |
| 2051 | // handle here. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2052 | __ bind(&miss); |
| 2053 | GenerateMiss(masm); |
| 2054 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2055 | __ jmp(&call); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2056 | } |
| 2057 | |
| 2058 | |
| 2059 | void CallICStub::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2060 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2061 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2062 | // Push the receiver and the function and feedback info. |
| 2063 | __ Push(r1, r2, r3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2064 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2065 | // Call the entry. |
| 2066 | __ CallRuntime(Runtime::kCallIC_Miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2067 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2068 | // Move result to edi and exit the internal frame. |
| 2069 | __ mov(r1, r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2070 | } |
| 2071 | |
| 2072 | |
| 2073 | // StringCharCodeAtGenerator |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2074 | void StringCharCodeAtGenerator::GenerateFast(MacroAssembler* masm) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2075 | // If the receiver is a smi trigger the non-string case. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2076 | if (check_mode_ == RECEIVER_IS_UNKNOWN) { |
| 2077 | __ JumpIfSmi(object_, receiver_not_string_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2078 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2079 | // Fetch the instance type of the receiver into result register. |
| 2080 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2081 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 2082 | // If the receiver is not a string trigger the non-string case. |
| 2083 | __ tst(result_, Operand(kIsNotStringMask)); |
| 2084 | __ b(ne, receiver_not_string_); |
| 2085 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2086 | |
| 2087 | // If the index is non-smi trigger the non-smi case. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2088 | __ JumpIfNotSmi(index_, &index_not_smi_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2089 | __ bind(&got_smi_index_); |
| 2090 | |
| 2091 | // Check for index out of range. |
| 2092 | __ ldr(ip, FieldMemOperand(object_, String::kLengthOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2093 | __ cmp(ip, Operand(index_)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2094 | __ b(ls, index_out_of_range_); |
| 2095 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2096 | __ SmiUntag(index_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2097 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2098 | StringCharLoadGenerator::Generate(masm, |
| 2099 | object_, |
| 2100 | index_, |
| 2101 | result_, |
| 2102 | &call_runtime_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2103 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2104 | __ SmiTag(result_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2105 | __ bind(&exit_); |
| 2106 | } |
| 2107 | |
| 2108 | |
| 2109 | void StringCharCodeAtGenerator::GenerateSlow( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2110 | MacroAssembler* masm, EmbedMode embed_mode, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2111 | const RuntimeCallHelper& call_helper) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2112 | __ Abort(kUnexpectedFallthroughToCharCodeAtSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2113 | |
| 2114 | // Index is not a smi. |
| 2115 | __ bind(&index_not_smi_); |
| 2116 | // If index is a heap number, try converting it to an integer. |
| 2117 | __ CheckMap(index_, |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2118 | result_, |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2119 | Heap::kHeapNumberMapRootIndex, |
| 2120 | index_not_number_, |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2121 | DONT_DO_SMI_CHECK); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2122 | call_helper.BeforeCall(masm); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2123 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2124 | __ Push(LoadWithVectorDescriptor::VectorRegister(), |
| 2125 | LoadWithVectorDescriptor::SlotRegister(), object_, index_); |
| 2126 | } else { |
| 2127 | // index_ is consumed by runtime conversion function. |
| 2128 | __ Push(object_, index_); |
| 2129 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2130 | __ CallRuntime(Runtime::kNumberToSmi); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2131 | // Save the conversion result before the pop instructions below |
| 2132 | // have a chance to overwrite it. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2133 | __ Move(index_, r0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2134 | if (embed_mode == PART_OF_IC_HANDLER) { |
| 2135 | __ Pop(LoadWithVectorDescriptor::VectorRegister(), |
| 2136 | LoadWithVectorDescriptor::SlotRegister(), object_); |
| 2137 | } else { |
| 2138 | __ pop(object_); |
| 2139 | } |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2140 | // Reload the instance type. |
| 2141 | __ ldr(result_, FieldMemOperand(object_, HeapObject::kMapOffset)); |
| 2142 | __ ldrb(result_, FieldMemOperand(result_, Map::kInstanceTypeOffset)); |
| 2143 | call_helper.AfterCall(masm); |
| 2144 | // 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] | 2145 | __ JumpIfNotSmi(index_, index_out_of_range_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2146 | // Otherwise, return to the fast path. |
| 2147 | __ jmp(&got_smi_index_); |
| 2148 | |
| 2149 | // Call runtime. We get here when the receiver is a string and the |
| 2150 | // index is a number, but the code of getting the actual character |
| 2151 | // is too complex (e.g., when the string needs to be flattened). |
| 2152 | __ bind(&call_runtime_); |
| 2153 | call_helper.BeforeCall(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2154 | __ SmiTag(index_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2155 | __ Push(object_, index_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2156 | __ CallRuntime(Runtime::kStringCharCodeAtRT); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2157 | __ Move(result_, r0); |
| 2158 | call_helper.AfterCall(masm); |
| 2159 | __ jmp(&exit_); |
| 2160 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2161 | __ Abort(kUnexpectedFallthroughFromCharCodeAtSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2162 | } |
| 2163 | |
| 2164 | |
| 2165 | // ------------------------------------------------------------------------- |
| 2166 | // StringCharFromCodeGenerator |
| 2167 | |
| 2168 | void StringCharFromCodeGenerator::GenerateFast(MacroAssembler* masm) { |
| 2169 | // Fast case of Heap::LookupSingleCharacterStringFromCode. |
| 2170 | STATIC_ASSERT(kSmiTag == 0); |
| 2171 | STATIC_ASSERT(kSmiShiftSize == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2172 | DCHECK(base::bits::IsPowerOfTwo32(String::kMaxOneByteCharCodeU + 1)); |
| 2173 | __ tst(code_, Operand(kSmiTagMask | |
| 2174 | ((~String::kMaxOneByteCharCodeU) << kSmiTagSize))); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2175 | __ b(ne, &slow_case_); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2176 | |
| 2177 | __ LoadRoot(result_, Heap::kSingleCharacterStringCacheRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2178 | // At this point code register contains smi tagged one-byte char code. |
| 2179 | __ add(result_, result_, Operand::PointerOffsetFromSmiKey(code_)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2180 | __ ldr(result_, FieldMemOperand(result_, FixedArray::kHeaderSize)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2181 | __ CompareRoot(result_, Heap::kUndefinedValueRootIndex); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2182 | __ b(eq, &slow_case_); |
| 2183 | __ bind(&exit_); |
| 2184 | } |
| 2185 | |
| 2186 | |
| 2187 | void StringCharFromCodeGenerator::GenerateSlow( |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2188 | MacroAssembler* masm, |
| 2189 | const RuntimeCallHelper& call_helper) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2190 | __ Abort(kUnexpectedFallthroughToCharFromCodeSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2191 | |
| 2192 | __ bind(&slow_case_); |
| 2193 | call_helper.BeforeCall(masm); |
| 2194 | __ push(code_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2195 | __ CallRuntime(Runtime::kStringCharFromCode); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2196 | __ Move(result_, r0); |
| 2197 | call_helper.AfterCall(masm); |
| 2198 | __ jmp(&exit_); |
| 2199 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2200 | __ Abort(kUnexpectedFallthroughFromCharFromCodeSlowCase); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2201 | } |
| 2202 | |
| 2203 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2204 | enum CopyCharactersFlags { COPY_ONE_BYTE = 1, DEST_ALWAYS_ALIGNED = 2 }; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2205 | |
| 2206 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2207 | void StringHelper::GenerateCopyCharacters(MacroAssembler* masm, |
| 2208 | Register dest, |
| 2209 | Register src, |
| 2210 | Register count, |
| 2211 | Register scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2212 | String::Encoding encoding) { |
| 2213 | if (FLAG_debug_code) { |
| 2214 | // Check that destination is word aligned. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2215 | __ tst(dest, Operand(kPointerAlignmentMask)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2216 | __ Check(eq, kDestinationOfCopyNotAligned); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2217 | } |
| 2218 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2219 | // Assumes word reads and writes are little endian. |
| 2220 | // Nothing to do for zero characters. |
| 2221 | Label done; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2222 | if (encoding == String::TWO_BYTE_ENCODING) { |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2223 | __ add(count, count, Operand(count), SetCC); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2224 | } |
| 2225 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2226 | Register limit = count; // Read until dest equals this. |
| 2227 | __ add(limit, dest, Operand(count)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2228 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2229 | Label loop_entry, loop; |
| 2230 | // Copy bytes from src to dest until dest hits limit. |
| 2231 | __ b(&loop_entry); |
| 2232 | __ bind(&loop); |
| 2233 | __ ldrb(scratch, MemOperand(src, 1, PostIndex), lt); |
| 2234 | __ strb(scratch, MemOperand(dest, 1, PostIndex)); |
| 2235 | __ bind(&loop_entry); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2236 | __ cmp(dest, Operand(limit)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2237 | __ b(lt, &loop); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2238 | |
| 2239 | __ bind(&done); |
| 2240 | } |
| 2241 | |
| 2242 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2243 | void SubStringStub::Generate(MacroAssembler* masm) { |
| 2244 | Label runtime; |
| 2245 | |
| 2246 | // Stack frame on entry. |
| 2247 | // lr: return address |
| 2248 | // sp[0]: to |
| 2249 | // sp[4]: from |
| 2250 | // sp[8]: string |
| 2251 | |
| 2252 | // This stub is called from the native-call %_SubString(...), so |
| 2253 | // nothing can be assumed about the arguments. It is tested that: |
| 2254 | // "string" is a sequential string, |
| 2255 | // both "from" and "to" are smis, and |
| 2256 | // 0 <= from <= to <= string.length. |
| 2257 | // If any of these assumptions fail, we call the runtime system. |
| 2258 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2259 | const int kToOffset = 0 * kPointerSize; |
| 2260 | const int kFromOffset = 1 * kPointerSize; |
| 2261 | const int kStringOffset = 2 * kPointerSize; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2262 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2263 | __ Ldrd(r2, r3, MemOperand(sp, kToOffset)); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 2264 | STATIC_ASSERT(kFromOffset == kToOffset + 4); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2265 | STATIC_ASSERT(kSmiTag == 0); |
| 2266 | STATIC_ASSERT(kSmiTagSize + kSmiShiftSize == 1); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2267 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2268 | // Arithmetic shift right by one un-smi-tags. In this case we rotate right |
| 2269 | // instead because we bail out on non-smi values: ROR and ASR are equivalent |
| 2270 | // for smis but they set the flags in a way that's easier to optimize. |
| 2271 | __ mov(r2, Operand(r2, ROR, 1), SetCC); |
| 2272 | __ mov(r3, Operand(r3, ROR, 1), SetCC, cc); |
| 2273 | // If either to or from had the smi tag bit set, then C is set now, and N |
| 2274 | // 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] | 2275 | // We want to bailout to runtime here if From is negative. In that case, the |
| 2276 | // 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] | 2277 | // runtime. |
| 2278 | // Executed if both r2 and r3 are untagged integers. |
| 2279 | __ sub(r2, r2, Operand(r3), SetCC, cc); |
| 2280 | // One of the above un-smis or the above SUB could have set N==1. |
| 2281 | __ 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] | 2282 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2283 | // Make sure first argument is a string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2284 | __ ldr(r0, MemOperand(sp, kStringOffset)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2285 | __ JumpIfSmi(r0, &runtime); |
| 2286 | Condition is_string = masm->IsObjectStringType(r0, r1); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2287 | __ b(NegateCondition(is_string), &runtime); |
| 2288 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2289 | Label single_char; |
| 2290 | __ cmp(r2, Operand(1)); |
| 2291 | __ b(eq, &single_char); |
| 2292 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2293 | // Short-cut for the case of trivial substring. |
| 2294 | Label return_r0; |
| 2295 | // r0: original string |
| 2296 | // r2: result string length |
| 2297 | __ ldr(r4, FieldMemOperand(r0, String::kLengthOffset)); |
| 2298 | __ cmp(r2, Operand(r4, ASR, 1)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2299 | // Return original string. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2300 | __ b(eq, &return_r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2301 | // Longer than original string's length or negative: unsafe arguments. |
| 2302 | __ b(hi, &runtime); |
| 2303 | // Shorter than original string's length: an actual substring. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2304 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2305 | // Deal with different string types: update the index if necessary |
| 2306 | // and put the underlying string into r5. |
| 2307 | // r0: original string |
| 2308 | // r1: instance type |
| 2309 | // r2: length |
| 2310 | // r3: from index (untagged) |
| 2311 | Label underlying_unpacked, sliced_string, seq_or_external_string; |
| 2312 | // If the string is not indirect, it can only be sequential or external. |
| 2313 | STATIC_ASSERT(kIsIndirectStringMask == (kSlicedStringTag & kConsStringTag)); |
| 2314 | STATIC_ASSERT(kIsIndirectStringMask != 0); |
| 2315 | __ tst(r1, Operand(kIsIndirectStringMask)); |
| 2316 | __ b(eq, &seq_or_external_string); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2317 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2318 | __ tst(r1, Operand(kSlicedNotConsMask)); |
| 2319 | __ b(ne, &sliced_string); |
| 2320 | // Cons string. Check whether it is flat, then fetch first part. |
| 2321 | __ ldr(r5, FieldMemOperand(r0, ConsString::kSecondOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2322 | __ CompareRoot(r5, Heap::kempty_stringRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2323 | __ b(ne, &runtime); |
| 2324 | __ ldr(r5, FieldMemOperand(r0, ConsString::kFirstOffset)); |
| 2325 | // Update instance type. |
| 2326 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 2327 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 2328 | __ jmp(&underlying_unpacked); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2329 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2330 | __ bind(&sliced_string); |
| 2331 | // Sliced string. Fetch parent and correct start index by offset. |
| 2332 | __ ldr(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
| 2333 | __ ldr(r4, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
| 2334 | __ add(r3, r3, Operand(r4, ASR, 1)); // Add offset to index. |
| 2335 | // Update instance type. |
| 2336 | __ ldr(r1, FieldMemOperand(r5, HeapObject::kMapOffset)); |
| 2337 | __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset)); |
| 2338 | __ jmp(&underlying_unpacked); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2339 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2340 | __ bind(&seq_or_external_string); |
| 2341 | // Sequential or external string. Just move string to the expected register. |
| 2342 | __ mov(r5, r0); |
| 2343 | |
| 2344 | __ bind(&underlying_unpacked); |
| 2345 | |
| 2346 | if (FLAG_string_slices) { |
| 2347 | Label copy_routine; |
| 2348 | // r5: underlying subject string |
| 2349 | // r1: instance type of underlying subject string |
| 2350 | // r2: length |
| 2351 | // r3: adjusted start index (untagged) |
| 2352 | __ cmp(r2, Operand(SlicedString::kMinLength)); |
| 2353 | // Short slice. Copy instead of slicing. |
| 2354 | __ b(lt, ©_routine); |
| 2355 | // Allocate new sliced string. At this point we do not reload the instance |
| 2356 | // type including the string encoding because we simply rely on the info |
| 2357 | // provided by the original string. It does not matter if the original |
| 2358 | // string's encoding is wrong because we always have to recheck encoding of |
| 2359 | // the newly created string's parent anyways due to externalized strings. |
| 2360 | Label two_byte_slice, set_slice_header; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2361 | STATIC_ASSERT((kStringEncodingMask & kOneByteStringTag) != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2362 | STATIC_ASSERT((kStringEncodingMask & kTwoByteStringTag) == 0); |
| 2363 | __ tst(r1, Operand(kStringEncodingMask)); |
| 2364 | __ b(eq, &two_byte_slice); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2365 | __ AllocateOneByteSlicedString(r0, r2, r6, r4, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2366 | __ jmp(&set_slice_header); |
| 2367 | __ bind(&two_byte_slice); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2368 | __ AllocateTwoByteSlicedString(r0, r2, r6, r4, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2369 | __ bind(&set_slice_header); |
| 2370 | __ mov(r3, Operand(r3, LSL, 1)); |
| 2371 | __ str(r5, FieldMemOperand(r0, SlicedString::kParentOffset)); |
| 2372 | __ str(r3, FieldMemOperand(r0, SlicedString::kOffsetOffset)); |
| 2373 | __ jmp(&return_r0); |
| 2374 | |
| 2375 | __ bind(©_routine); |
| 2376 | } |
| 2377 | |
| 2378 | // r5: underlying subject string |
| 2379 | // r1: instance type of underlying subject string |
| 2380 | // r2: length |
| 2381 | // r3: adjusted start index (untagged) |
| 2382 | Label two_byte_sequential, sequential_string, allocate_result; |
| 2383 | STATIC_ASSERT(kExternalStringTag != 0); |
| 2384 | STATIC_ASSERT(kSeqStringTag == 0); |
| 2385 | __ tst(r1, Operand(kExternalStringTag)); |
| 2386 | __ b(eq, &sequential_string); |
| 2387 | |
| 2388 | // Handle external string. |
| 2389 | // Rule out short external strings. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2390 | STATIC_ASSERT(kShortExternalStringTag != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2391 | __ tst(r1, Operand(kShortExternalStringTag)); |
| 2392 | __ b(ne, &runtime); |
| 2393 | __ ldr(r5, FieldMemOperand(r5, ExternalString::kResourceDataOffset)); |
| 2394 | // r5 already points to the first character of underlying string. |
| 2395 | __ jmp(&allocate_result); |
| 2396 | |
| 2397 | __ bind(&sequential_string); |
| 2398 | // Locate first character of underlying subject string. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2399 | STATIC_ASSERT(SeqTwoByteString::kHeaderSize == SeqOneByteString::kHeaderSize); |
| 2400 | __ add(r5, r5, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2401 | |
| 2402 | __ bind(&allocate_result); |
| 2403 | // Sequential acii string. Allocate the result. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2404 | STATIC_ASSERT((kOneByteStringTag & kStringEncodingMask) != 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2405 | __ tst(r1, Operand(kStringEncodingMask)); |
| 2406 | __ b(eq, &two_byte_sequential); |
| 2407 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2408 | // Allocate and copy the resulting one-byte string. |
| 2409 | __ AllocateOneByteString(r0, r2, r4, r6, r1, &runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2410 | |
| 2411 | // Locate first character of substring to copy. |
| 2412 | __ add(r5, r5, r3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2413 | // Locate first character of result. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2414 | __ add(r1, r0, Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2415 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2416 | // r0: result string |
| 2417 | // r1: first character of result string |
| 2418 | // r2: result string length |
| 2419 | // r5: first character of substring to copy |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2420 | STATIC_ASSERT((SeqOneByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
| 2421 | StringHelper::GenerateCopyCharacters( |
| 2422 | masm, r1, r5, r2, r3, String::ONE_BYTE_ENCODING); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2423 | __ jmp(&return_r0); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2424 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2425 | // Allocate and copy the resulting two-byte string. |
| 2426 | __ bind(&two_byte_sequential); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2427 | __ AllocateTwoByteString(r0, r2, r4, r6, r1, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2428 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2429 | // Locate first character of substring to copy. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2430 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2431 | __ add(r5, r5, Operand(r3, LSL, 1)); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2432 | // Locate first character of result. |
| 2433 | __ add(r1, r0, Operand(SeqTwoByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2434 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2435 | // r0: result string. |
| 2436 | // r1: first character of result. |
| 2437 | // r2: result length. |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2438 | // r5: first character of substring to copy. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2439 | STATIC_ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2440 | StringHelper::GenerateCopyCharacters( |
| 2441 | masm, r1, r5, r2, r3, String::TWO_BYTE_ENCODING); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 2442 | |
| 2443 | __ bind(&return_r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2444 | Counters* counters = isolate()->counters(); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2445 | __ IncrementCounter(counters->sub_string_native(), 1, r3, r4); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2446 | __ Drop(3); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2447 | __ Ret(); |
| 2448 | |
| 2449 | // Just jump to runtime to create the sub string. |
| 2450 | __ bind(&runtime); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2451 | __ TailCallRuntime(Runtime::kSubString); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2452 | |
| 2453 | __ bind(&single_char); |
| 2454 | // r0: original string |
| 2455 | // r1: instance type |
| 2456 | // r2: length |
| 2457 | // r3: from index (untagged) |
| 2458 | __ SmiTag(r3, r3); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2459 | StringCharAtGenerator generator(r0, r3, r2, r0, &runtime, &runtime, &runtime, |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2460 | RECEIVER_IS_STRING); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2461 | generator.GenerateFast(masm); |
| 2462 | __ Drop(3); |
| 2463 | __ Ret(); |
| 2464 | generator.SkipSlow(masm, &runtime); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2465 | } |
| 2466 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2467 | void ToStringStub::Generate(MacroAssembler* masm) { |
| 2468 | // The ToString stub takes one argument in r0. |
| 2469 | Label is_number; |
| 2470 | __ JumpIfSmi(r0, &is_number); |
| 2471 | |
| 2472 | __ CompareObjectType(r0, r1, r1, FIRST_NONSTRING_TYPE); |
| 2473 | // r0: receiver |
| 2474 | // r1: receiver instance type |
| 2475 | __ Ret(lo); |
| 2476 | |
| 2477 | Label not_heap_number; |
| 2478 | __ cmp(r1, Operand(HEAP_NUMBER_TYPE)); |
| 2479 | __ b(ne, ¬_heap_number); |
| 2480 | __ bind(&is_number); |
| 2481 | NumberToStringStub stub(isolate()); |
| 2482 | __ TailCallStub(&stub); |
| 2483 | __ bind(¬_heap_number); |
| 2484 | |
| 2485 | Label not_oddball; |
| 2486 | __ cmp(r1, Operand(ODDBALL_TYPE)); |
| 2487 | __ b(ne, ¬_oddball); |
| 2488 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToStringOffset)); |
| 2489 | __ Ret(); |
| 2490 | __ bind(¬_oddball); |
| 2491 | |
| 2492 | __ push(r0); // Push argument. |
| 2493 | __ TailCallRuntime(Runtime::kToString); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 2494 | } |
| 2495 | |
| 2496 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2497 | void ToNameStub::Generate(MacroAssembler* masm) { |
| 2498 | // The ToName stub takes one argument in r0. |
| 2499 | Label is_number; |
| 2500 | __ JumpIfSmi(r0, &is_number); |
| 2501 | |
| 2502 | STATIC_ASSERT(FIRST_NAME_TYPE == FIRST_TYPE); |
| 2503 | __ CompareObjectType(r0, r1, r1, LAST_NAME_TYPE); |
| 2504 | // r0: receiver |
| 2505 | // r1: receiver instance type |
| 2506 | __ Ret(ls); |
| 2507 | |
| 2508 | Label not_heap_number; |
| 2509 | __ cmp(r1, Operand(HEAP_NUMBER_TYPE)); |
| 2510 | __ b(ne, ¬_heap_number); |
| 2511 | __ bind(&is_number); |
| 2512 | NumberToStringStub stub(isolate()); |
| 2513 | __ TailCallStub(&stub); |
| 2514 | __ bind(¬_heap_number); |
| 2515 | |
| 2516 | Label not_oddball; |
| 2517 | __ cmp(r1, Operand(ODDBALL_TYPE)); |
| 2518 | __ b(ne, ¬_oddball); |
| 2519 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToStringOffset)); |
| 2520 | __ Ret(); |
| 2521 | __ bind(¬_oddball); |
| 2522 | |
| 2523 | __ push(r0); // Push argument. |
| 2524 | __ TailCallRuntime(Runtime::kToName); |
| 2525 | } |
| 2526 | |
| 2527 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2528 | void StringHelper::GenerateFlatOneByteStringEquals( |
| 2529 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 2530 | Register scratch2, Register scratch3) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2531 | Register length = scratch1; |
| 2532 | |
| 2533 | // Compare lengths. |
| 2534 | Label strings_not_equal, check_zero_length; |
| 2535 | __ ldr(length, FieldMemOperand(left, String::kLengthOffset)); |
| 2536 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 2537 | __ cmp(length, scratch2); |
| 2538 | __ b(eq, &check_zero_length); |
| 2539 | __ bind(&strings_not_equal); |
| 2540 | __ mov(r0, Operand(Smi::FromInt(NOT_EQUAL))); |
| 2541 | __ Ret(); |
| 2542 | |
| 2543 | // Check if the length is zero. |
| 2544 | Label compare_chars; |
| 2545 | __ bind(&check_zero_length); |
| 2546 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2547 | __ cmp(length, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2548 | __ b(ne, &compare_chars); |
| 2549 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 2550 | __ Ret(); |
| 2551 | |
| 2552 | // Compare characters. |
| 2553 | __ bind(&compare_chars); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2554 | GenerateOneByteCharsCompareLoop(masm, left, right, length, scratch2, scratch3, |
| 2555 | &strings_not_equal); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2556 | |
| 2557 | // Characters are equal. |
| 2558 | __ mov(r0, Operand(Smi::FromInt(EQUAL))); |
| 2559 | __ Ret(); |
| 2560 | } |
| 2561 | |
| 2562 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2563 | void StringHelper::GenerateCompareFlatOneByteStrings( |
| 2564 | MacroAssembler* masm, Register left, Register right, Register scratch1, |
| 2565 | Register scratch2, Register scratch3, Register scratch4) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2566 | Label result_not_equal, compare_lengths; |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2567 | // Find minimum length and length difference. |
| 2568 | __ ldr(scratch1, FieldMemOperand(left, String::kLengthOffset)); |
| 2569 | __ ldr(scratch2, FieldMemOperand(right, String::kLengthOffset)); |
| 2570 | __ sub(scratch3, scratch1, Operand(scratch2), SetCC); |
| 2571 | Register length_delta = scratch3; |
| 2572 | __ mov(scratch1, scratch2, LeaveCC, gt); |
| 2573 | Register min_length = scratch1; |
| 2574 | STATIC_ASSERT(kSmiTag == 0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2575 | __ cmp(min_length, Operand::Zero()); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2576 | __ b(eq, &compare_lengths); |
| 2577 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2578 | // Compare loop. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2579 | GenerateOneByteCharsCompareLoop(masm, left, right, min_length, scratch2, |
| 2580 | scratch4, &result_not_equal); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2581 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2582 | // Compare lengths - strings up to min-length are equal. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2583 | __ bind(&compare_lengths); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2584 | DCHECK(Smi::FromInt(EQUAL) == static_cast<Smi*>(0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2585 | // Use length_delta as result if it's zero. |
| 2586 | __ mov(r0, Operand(length_delta), SetCC); |
| 2587 | __ bind(&result_not_equal); |
| 2588 | // Conditionally update the result based either on length_delta or |
| 2589 | // the last comparion performed in the loop above. |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2590 | __ mov(r0, Operand(Smi::FromInt(GREATER)), LeaveCC, gt); |
| 2591 | __ mov(r0, Operand(Smi::FromInt(LESS)), LeaveCC, lt); |
| 2592 | __ Ret(); |
| 2593 | } |
| 2594 | |
| 2595 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2596 | void StringHelper::GenerateOneByteCharsCompareLoop( |
| 2597 | MacroAssembler* masm, Register left, Register right, Register length, |
| 2598 | Register scratch1, Register scratch2, Label* chars_not_equal) { |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2599 | // Change index to run from -length to -1 by adding length to string |
| 2600 | // start. This means that loop ends when index reaches zero, which |
| 2601 | // doesn't need an additional compare. |
| 2602 | __ SmiUntag(length); |
| 2603 | __ add(scratch1, length, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2604 | Operand(SeqOneByteString::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2605 | __ add(left, left, Operand(scratch1)); |
| 2606 | __ add(right, right, Operand(scratch1)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 2607 | __ rsb(length, length, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2608 | Register index = length; // index = -length; |
| 2609 | |
| 2610 | // Compare loop. |
| 2611 | Label loop; |
| 2612 | __ bind(&loop); |
| 2613 | __ ldrb(scratch1, MemOperand(left, index)); |
| 2614 | __ ldrb(scratch2, MemOperand(right, index)); |
| 2615 | __ cmp(scratch1, scratch2); |
| 2616 | __ b(ne, chars_not_equal); |
| 2617 | __ add(index, index, Operand(1), SetCC); |
| 2618 | __ b(ne, &loop); |
| 2619 | } |
| 2620 | |
| 2621 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2622 | void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) { |
| 2623 | // ----------- S t a t e ------------- |
| 2624 | // -- r1 : left |
| 2625 | // -- r0 : right |
| 2626 | // -- lr : return address |
| 2627 | // ----------------------------------- |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2628 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2629 | // Load r2 with the allocation site. We stick an undefined dummy value here |
| 2630 | // and replace it with the real allocation site later when we instantiate this |
| 2631 | // stub in BinaryOpICWithAllocationSiteStub::GetCodeCopyFromTemplate(). |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 2632 | __ Move(r2, isolate()->factory()->undefined_value()); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 2633 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2634 | // Make sure that we actually patched the allocation site. |
| 2635 | if (FLAG_debug_code) { |
| 2636 | __ tst(r2, Operand(kSmiTagMask)); |
| 2637 | __ Assert(ne, kExpectedAllocationSite); |
| 2638 | __ push(r2); |
| 2639 | __ ldr(r2, FieldMemOperand(r2, HeapObject::kMapOffset)); |
| 2640 | __ LoadRoot(ip, Heap::kAllocationSiteMapRootIndex); |
| 2641 | __ cmp(r2, ip); |
| 2642 | __ pop(r2); |
| 2643 | __ Assert(eq, kExpectedAllocationSite); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 2644 | } |
| 2645 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2646 | // Tail call into the stub that handles binary operations with allocation |
| 2647 | // sites. |
| 2648 | BinaryOpWithAllocationSiteStub stub(isolate(), state()); |
| 2649 | __ TailCallStub(&stub); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2650 | } |
| 2651 | |
| 2652 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2653 | void CompareICStub::GenerateBooleans(MacroAssembler* masm) { |
| 2654 | DCHECK_EQ(CompareICState::BOOLEAN, state()); |
| 2655 | Label miss; |
| 2656 | |
| 2657 | __ CheckMap(r1, r2, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
| 2658 | __ CheckMap(r0, r3, Heap::kBooleanMapRootIndex, &miss, DO_SMI_CHECK); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2659 | if (!Token::IsEqualityOp(op())) { |
| 2660 | __ ldr(r1, FieldMemOperand(r1, Oddball::kToNumberOffset)); |
| 2661 | __ AssertSmi(r1); |
| 2662 | __ ldr(r0, FieldMemOperand(r0, Oddball::kToNumberOffset)); |
| 2663 | __ AssertSmi(r0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2664 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2665 | __ sub(r0, r1, r0); |
| 2666 | __ Ret(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2667 | |
| 2668 | __ bind(&miss); |
| 2669 | GenerateMiss(masm); |
| 2670 | } |
| 2671 | |
| 2672 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2673 | void CompareICStub::GenerateSmis(MacroAssembler* masm) { |
| 2674 | DCHECK(state() == CompareICState::SMI); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2675 | Label miss; |
| 2676 | __ orr(r2, r1, r0); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2677 | __ JumpIfNotSmi(r2, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2678 | |
| 2679 | if (GetCondition() == eq) { |
| 2680 | // For equality we do not care about the sign of the result. |
| 2681 | __ sub(r0, r0, r1, SetCC); |
| 2682 | } else { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2683 | // Untag before subtracting to avoid handling overflow. |
| 2684 | __ SmiUntag(r1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2685 | __ sub(r0, r1, Operand::SmiUntag(r0)); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2686 | } |
| 2687 | __ Ret(); |
| 2688 | |
| 2689 | __ bind(&miss); |
| 2690 | GenerateMiss(masm); |
| 2691 | } |
| 2692 | |
| 2693 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2694 | void CompareICStub::GenerateNumbers(MacroAssembler* masm) { |
| 2695 | DCHECK(state() == CompareICState::NUMBER); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2696 | |
| 2697 | Label generic_stub; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2698 | Label unordered, maybe_undefined1, maybe_undefined2; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2699 | Label miss; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2700 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2701 | if (left() == CompareICState::SMI) { |
| 2702 | __ JumpIfNotSmi(r1, &miss); |
| 2703 | } |
| 2704 | if (right() == CompareICState::SMI) { |
| 2705 | __ JumpIfNotSmi(r0, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2706 | } |
| 2707 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2708 | // Inlining the double comparison and falling back to the general compare |
| 2709 | // stub if NaN is involved. |
| 2710 | // Load left and right operand. |
| 2711 | Label done, left, left_smi, right_smi; |
| 2712 | __ JumpIfSmi(r0, &right_smi); |
| 2713 | __ CheckMap(r0, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined1, |
| 2714 | DONT_DO_SMI_CHECK); |
| 2715 | __ sub(r2, r0, Operand(kHeapObjectTag)); |
| 2716 | __ vldr(d1, r2, HeapNumber::kValueOffset); |
| 2717 | __ b(&left); |
| 2718 | __ bind(&right_smi); |
| 2719 | __ SmiToDouble(d1, r0); |
| 2720 | |
| 2721 | __ bind(&left); |
| 2722 | __ JumpIfSmi(r1, &left_smi); |
| 2723 | __ CheckMap(r1, r2, Heap::kHeapNumberMapRootIndex, &maybe_undefined2, |
| 2724 | DONT_DO_SMI_CHECK); |
| 2725 | __ sub(r2, r1, Operand(kHeapObjectTag)); |
| 2726 | __ vldr(d0, r2, HeapNumber::kValueOffset); |
| 2727 | __ b(&done); |
| 2728 | __ bind(&left_smi); |
| 2729 | __ SmiToDouble(d0, r1); |
| 2730 | |
| 2731 | __ bind(&done); |
| 2732 | // Compare operands. |
| 2733 | __ VFPCompareAndSetFlags(d0, d1); |
| 2734 | |
| 2735 | // Don't base result on status bits when a NaN is involved. |
| 2736 | __ b(vs, &unordered); |
| 2737 | |
| 2738 | // Return a result of -1, 0, or 1, based on status bits. |
| 2739 | __ mov(r0, Operand(EQUAL), LeaveCC, eq); |
| 2740 | __ mov(r0, Operand(LESS), LeaveCC, lt); |
| 2741 | __ mov(r0, Operand(GREATER), LeaveCC, gt); |
| 2742 | __ Ret(); |
| 2743 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2744 | __ bind(&unordered); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2745 | __ bind(&generic_stub); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 2746 | CompareICStub stub(isolate(), op(), CompareICState::GENERIC, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2747 | CompareICState::GENERIC, CompareICState::GENERIC); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2748 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 2749 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2750 | __ bind(&maybe_undefined1); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2751 | if (Token::IsOrderedRelationalCompareOp(op())) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2752 | __ CompareRoot(r0, Heap::kUndefinedValueRootIndex); |
| 2753 | __ b(ne, &miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2754 | __ JumpIfSmi(r1, &unordered); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2755 | __ CompareObjectType(r1, r2, r2, HEAP_NUMBER_TYPE); |
| 2756 | __ b(ne, &maybe_undefined2); |
| 2757 | __ jmp(&unordered); |
| 2758 | } |
| 2759 | |
| 2760 | __ bind(&maybe_undefined2); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2761 | if (Token::IsOrderedRelationalCompareOp(op())) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2762 | __ CompareRoot(r1, Heap::kUndefinedValueRootIndex); |
| 2763 | __ b(eq, &unordered); |
| 2764 | } |
| 2765 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2766 | __ bind(&miss); |
| 2767 | GenerateMiss(masm); |
| 2768 | } |
| 2769 | |
| 2770 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2771 | void CompareICStub::GenerateInternalizedStrings(MacroAssembler* masm) { |
| 2772 | DCHECK(state() == CompareICState::INTERNALIZED_STRING); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2773 | Label miss; |
| 2774 | |
| 2775 | // Registers containing left and right operands respectively. |
| 2776 | Register left = r1; |
| 2777 | Register right = r0; |
| 2778 | Register tmp1 = r2; |
| 2779 | Register tmp2 = r3; |
| 2780 | |
| 2781 | // Check that both operands are heap objects. |
| 2782 | __ JumpIfEitherSmi(left, right, &miss); |
| 2783 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2784 | // Check that both operands are internalized strings. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2785 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 2786 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 2787 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 2788 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2789 | STATIC_ASSERT(kInternalizedTag == 0 && kStringTag == 0); |
| 2790 | __ orr(tmp1, tmp1, Operand(tmp2)); |
| 2791 | __ tst(tmp1, Operand(kIsNotStringMask | kIsNotInternalizedMask)); |
| 2792 | __ b(ne, &miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2793 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2794 | // Internalized strings are compared by identity. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2795 | __ cmp(left, right); |
| 2796 | // Make sure r0 is non-zero. At this point input operands are |
| 2797 | // guaranteed to be non-zero. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2798 | DCHECK(right.is(r0)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2799 | STATIC_ASSERT(EQUAL == 0); |
| 2800 | STATIC_ASSERT(kSmiTag == 0); |
| 2801 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 2802 | __ Ret(); |
| 2803 | |
| 2804 | __ bind(&miss); |
| 2805 | GenerateMiss(masm); |
| 2806 | } |
| 2807 | |
| 2808 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2809 | void CompareICStub::GenerateUniqueNames(MacroAssembler* masm) { |
| 2810 | DCHECK(state() == CompareICState::UNIQUE_NAME); |
| 2811 | DCHECK(GetCondition() == eq); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2812 | Label miss; |
| 2813 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2814 | // Registers containing left and right operands respectively. |
| 2815 | Register left = r1; |
| 2816 | Register right = r0; |
| 2817 | Register tmp1 = r2; |
| 2818 | Register tmp2 = r3; |
| 2819 | |
| 2820 | // Check that both operands are heap objects. |
| 2821 | __ JumpIfEitherSmi(left, right, &miss); |
| 2822 | |
| 2823 | // Check that both operands are unique names. This leaves the instance |
| 2824 | // types loaded in tmp1 and tmp2. |
| 2825 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 2826 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 2827 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 2828 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 2829 | |
| 2830 | __ JumpIfNotUniqueNameInstanceType(tmp1, &miss); |
| 2831 | __ JumpIfNotUniqueNameInstanceType(tmp2, &miss); |
| 2832 | |
| 2833 | // Unique names are compared by identity. |
| 2834 | __ cmp(left, right); |
| 2835 | // Make sure r0 is non-zero. At this point input operands are |
| 2836 | // guaranteed to be non-zero. |
| 2837 | DCHECK(right.is(r0)); |
| 2838 | STATIC_ASSERT(EQUAL == 0); |
| 2839 | STATIC_ASSERT(kSmiTag == 0); |
| 2840 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 2841 | __ Ret(); |
| 2842 | |
| 2843 | __ bind(&miss); |
| 2844 | GenerateMiss(masm); |
| 2845 | } |
| 2846 | |
| 2847 | |
| 2848 | void CompareICStub::GenerateStrings(MacroAssembler* masm) { |
| 2849 | DCHECK(state() == CompareICState::STRING); |
| 2850 | Label miss; |
| 2851 | |
| 2852 | bool equality = Token::IsEqualityOp(op()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2853 | |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2854 | // Registers containing left and right operands respectively. |
| 2855 | Register left = r1; |
| 2856 | Register right = r0; |
| 2857 | Register tmp1 = r2; |
| 2858 | Register tmp2 = r3; |
| 2859 | Register tmp3 = r4; |
| 2860 | Register tmp4 = r5; |
| 2861 | |
| 2862 | // Check that both operands are heap objects. |
| 2863 | __ JumpIfEitherSmi(left, right, &miss); |
| 2864 | |
| 2865 | // Check that both operands are strings. This leaves the instance |
| 2866 | // types loaded in tmp1 and tmp2. |
| 2867 | __ ldr(tmp1, FieldMemOperand(left, HeapObject::kMapOffset)); |
| 2868 | __ ldr(tmp2, FieldMemOperand(right, HeapObject::kMapOffset)); |
| 2869 | __ ldrb(tmp1, FieldMemOperand(tmp1, Map::kInstanceTypeOffset)); |
| 2870 | __ ldrb(tmp2, FieldMemOperand(tmp2, Map::kInstanceTypeOffset)); |
| 2871 | STATIC_ASSERT(kNotStringTag != 0); |
| 2872 | __ orr(tmp3, tmp1, tmp2); |
| 2873 | __ tst(tmp3, Operand(kIsNotStringMask)); |
| 2874 | __ b(ne, &miss); |
| 2875 | |
| 2876 | // Fast check for identical strings. |
| 2877 | __ cmp(left, right); |
| 2878 | STATIC_ASSERT(EQUAL == 0); |
| 2879 | STATIC_ASSERT(kSmiTag == 0); |
| 2880 | __ mov(r0, Operand(Smi::FromInt(EQUAL)), LeaveCC, eq); |
| 2881 | __ Ret(eq); |
| 2882 | |
| 2883 | // Handle not identical strings. |
| 2884 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2885 | // Check that both strings are internalized strings. If they are, we're done |
| 2886 | // because we already know they are not identical. We know they are both |
| 2887 | // strings. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2888 | if (equality) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2889 | DCHECK(GetCondition() == eq); |
| 2890 | STATIC_ASSERT(kInternalizedTag == 0); |
| 2891 | __ orr(tmp3, tmp1, Operand(tmp2)); |
| 2892 | __ tst(tmp3, Operand(kIsNotInternalizedMask)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2893 | // Make sure r0 is non-zero. At this point input operands are |
| 2894 | // guaranteed to be non-zero. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2895 | DCHECK(right.is(r0)); |
| 2896 | __ Ret(eq); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2897 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2898 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2899 | // Check that both strings are sequential one-byte. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2900 | Label runtime; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2901 | __ JumpIfBothInstanceTypesAreNotSequentialOneByte(tmp1, tmp2, tmp3, tmp4, |
| 2902 | &runtime); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2903 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2904 | // Compare flat one-byte strings. Returns when done. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2905 | if (equality) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2906 | StringHelper::GenerateFlatOneByteStringEquals(masm, left, right, tmp1, tmp2, |
| 2907 | tmp3); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2908 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2909 | StringHelper::GenerateCompareFlatOneByteStrings(masm, left, right, tmp1, |
| 2910 | tmp2, tmp3, tmp4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2911 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2912 | |
| 2913 | // Handle more complex cases in runtime. |
| 2914 | __ bind(&runtime); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2915 | if (equality) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2916 | { |
| 2917 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 2918 | __ Push(left, right); |
| 2919 | __ CallRuntime(Runtime::kStringEqual); |
| 2920 | } |
| 2921 | __ LoadRoot(r1, Heap::kTrueValueRootIndex); |
| 2922 | __ sub(r0, r0, r1); |
| 2923 | __ Ret(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2924 | } else { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 2925 | __ Push(left, right); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2926 | __ TailCallRuntime(Runtime::kStringCompare); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2927 | } |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 2928 | |
| 2929 | __ bind(&miss); |
| 2930 | GenerateMiss(masm); |
| 2931 | } |
| 2932 | |
| 2933 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2934 | void CompareICStub::GenerateReceivers(MacroAssembler* masm) { |
| 2935 | DCHECK_EQ(CompareICState::RECEIVER, state()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2936 | Label miss; |
| 2937 | __ and_(r2, r1, Operand(r0)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2938 | __ JumpIfSmi(r2, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2939 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2940 | STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE); |
| 2941 | __ CompareObjectType(r0, r2, r2, FIRST_JS_RECEIVER_TYPE); |
| 2942 | __ b(lt, &miss); |
| 2943 | __ CompareObjectType(r1, r2, r2, FIRST_JS_RECEIVER_TYPE); |
| 2944 | __ b(lt, &miss); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2945 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2946 | DCHECK(GetCondition() == eq); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 2947 | __ sub(r0, r0, Operand(r1)); |
| 2948 | __ Ret(); |
| 2949 | |
| 2950 | __ bind(&miss); |
| 2951 | GenerateMiss(masm); |
| 2952 | } |
| 2953 | |
| 2954 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2955 | void CompareICStub::GenerateKnownReceivers(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2956 | Label miss; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2957 | Handle<WeakCell> cell = Map::WeakCellForMap(known_map_); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2958 | __ and_(r2, r1, Operand(r0)); |
| 2959 | __ JumpIfSmi(r2, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2960 | __ GetWeakValue(r4, cell); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2961 | __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 2962 | __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2963 | __ cmp(r2, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2964 | __ b(ne, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2965 | __ cmp(r3, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2966 | __ b(ne, &miss); |
Ben Murdoch | c7cc028 | 2012-03-05 14:35:55 +0000 | [diff] [blame] | 2967 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2968 | if (Token::IsEqualityOp(op())) { |
| 2969 | __ sub(r0, r0, Operand(r1)); |
| 2970 | __ Ret(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2971 | } else { |
| 2972 | if (op() == Token::LT || op() == Token::LTE) { |
| 2973 | __ mov(r2, Operand(Smi::FromInt(GREATER))); |
| 2974 | } else { |
| 2975 | __ mov(r2, Operand(Smi::FromInt(LESS))); |
| 2976 | } |
| 2977 | __ Push(r1, r0, r2); |
| 2978 | __ TailCallRuntime(Runtime::kCompare); |
| 2979 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2980 | |
| 2981 | __ bind(&miss); |
| 2982 | GenerateMiss(masm); |
| 2983 | } |
| 2984 | |
| 2985 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2986 | void CompareICStub::GenerateMiss(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2987 | { |
| 2988 | // Call the runtime system in a fresh internal frame. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2989 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2990 | __ Push(r1, r0); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2991 | __ Push(lr, r1, r0); |
| 2992 | __ mov(ip, Operand(Smi::FromInt(op()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2993 | __ push(ip); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 2994 | __ CallRuntime(Runtime::kCompareIC_Miss); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2995 | // Compute the entry point of the rewritten stub. |
| 2996 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 2997 | // Restore registers. |
| 2998 | __ pop(lr); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2999 | __ Pop(r1, r0); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3000 | } |
| 3001 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 3002 | __ Jump(r2); |
| 3003 | } |
| 3004 | |
| 3005 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3006 | void DirectCEntryStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3007 | // Place the return address on the stack, making the call |
| 3008 | // GC safe. The RegExp backend also relies on this. |
| 3009 | __ str(lr, MemOperand(sp, 0)); |
| 3010 | __ blx(ip); // Call the C++ function. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3011 | __ ldr(pc, MemOperand(sp, 0)); |
| 3012 | } |
| 3013 | |
| 3014 | |
| 3015 | void DirectCEntryStub::GenerateCall(MacroAssembler* masm, |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 3016 | Register target) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3017 | intptr_t code = |
| 3018 | reinterpret_cast<intptr_t>(GetCode().location()); |
| 3019 | __ Move(ip, target); |
| 3020 | __ mov(lr, Operand(code, RelocInfo::CODE_TARGET)); |
| 3021 | __ blx(lr); // Call the stub. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 3022 | } |
| 3023 | |
| 3024 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3025 | void NameDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, |
| 3026 | Label* miss, |
| 3027 | Label* done, |
| 3028 | Register receiver, |
| 3029 | Register properties, |
| 3030 | Handle<Name> name, |
| 3031 | Register scratch0) { |
| 3032 | DCHECK(name->IsUniqueName()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3033 | // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 3034 | // not equal to the name and kProbes-th slot is not used (its name is the |
| 3035 | // undefined value), it guarantees the hash table doesn't contain the |
| 3036 | // property. It's true even if some slots represent deleted properties |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3037 | // (their names are the hole value). |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3038 | for (int i = 0; i < kInlinedProbes; i++) { |
| 3039 | // scratch0 points to properties hash. |
| 3040 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3041 | Register index = scratch0; |
| 3042 | // Capacity is smi 2^n. |
| 3043 | __ ldr(index, FieldMemOperand(properties, kCapacityOffset)); |
| 3044 | __ sub(index, index, Operand(1)); |
| 3045 | __ and_(index, index, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3046 | Smi::FromInt(name->Hash() + NameDictionary::GetProbeOffset(i)))); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3047 | |
| 3048 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3049 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3050 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 3051 | |
| 3052 | Register entity_name = scratch0; |
| 3053 | // Having undefined at this place means the name is not contained. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3054 | STATIC_ASSERT(kSmiTagSize == 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3055 | Register tmp = properties; |
| 3056 | __ add(tmp, properties, Operand(index, LSL, 1)); |
| 3057 | __ ldr(entity_name, FieldMemOperand(tmp, kElementsStartOffset)); |
| 3058 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3059 | DCHECK(!tmp.is(entity_name)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3060 | __ LoadRoot(tmp, Heap::kUndefinedValueRootIndex); |
| 3061 | __ cmp(entity_name, tmp); |
| 3062 | __ b(eq, done); |
| 3063 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3064 | // Load the hole ready for use below: |
| 3065 | __ LoadRoot(tmp, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3066 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3067 | // Stop if found the property. |
| 3068 | __ cmp(entity_name, Operand(Handle<Name>(name))); |
| 3069 | __ b(eq, miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3070 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3071 | Label good; |
| 3072 | __ cmp(entity_name, tmp); |
| 3073 | __ b(eq, &good); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3074 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3075 | // Check if the entry name is not a unique name. |
| 3076 | __ ldr(entity_name, FieldMemOperand(entity_name, HeapObject::kMapOffset)); |
| 3077 | __ ldrb(entity_name, |
| 3078 | FieldMemOperand(entity_name, Map::kInstanceTypeOffset)); |
| 3079 | __ JumpIfNotUniqueNameInstanceType(entity_name, miss); |
| 3080 | __ bind(&good); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3081 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3082 | // Restore the properties. |
| 3083 | __ ldr(properties, |
| 3084 | FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3085 | } |
| 3086 | |
| 3087 | const int spill_mask = |
| 3088 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | r3.bit() | |
| 3089 | r2.bit() | r1.bit() | r0.bit()); |
| 3090 | |
| 3091 | __ stm(db_w, sp, spill_mask); |
| 3092 | __ ldr(r0, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3093 | __ mov(r1, Operand(Handle<Name>(name))); |
| 3094 | NameDictionaryLookupStub stub(masm->isolate(), NEGATIVE_LOOKUP); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3095 | __ CallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3096 | __ cmp(r0, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3097 | __ ldm(ia_w, sp, spill_mask); |
| 3098 | |
| 3099 | __ b(eq, done); |
| 3100 | __ b(ne, miss); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3101 | } |
| 3102 | |
| 3103 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3104 | // Probe the name dictionary in the |elements| register. Jump to the |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3105 | // |done| label if a property with the given name is found. Jump to |
| 3106 | // the |miss| label otherwise. |
| 3107 | // If lookup was successful |scratch2| will be equal to elements + 4 * index. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3108 | void NameDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 3109 | Label* miss, |
| 3110 | Label* done, |
| 3111 | Register elements, |
| 3112 | Register name, |
| 3113 | Register scratch1, |
| 3114 | Register scratch2) { |
| 3115 | DCHECK(!elements.is(scratch1)); |
| 3116 | DCHECK(!elements.is(scratch2)); |
| 3117 | DCHECK(!name.is(scratch1)); |
| 3118 | DCHECK(!name.is(scratch2)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3119 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3120 | __ AssertName(name); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3121 | |
| 3122 | // Compute the capacity mask. |
| 3123 | __ ldr(scratch1, FieldMemOperand(elements, kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3124 | __ SmiUntag(scratch1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3125 | __ sub(scratch1, scratch1, Operand(1)); |
| 3126 | |
| 3127 | // Generate an unrolled loop that performs a few probes before |
| 3128 | // giving up. Measurements done on Gmail indicate that 2 probes |
| 3129 | // cover ~93% of loads from dictionaries. |
| 3130 | for (int i = 0; i < kInlinedProbes; i++) { |
| 3131 | // Compute the masked index: (hash + i + i * i) & mask. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3132 | __ ldr(scratch2, FieldMemOperand(name, Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3133 | if (i > 0) { |
| 3134 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 3135 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 3136 | // shifted in the following and instruction. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3137 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 3138 | 1 << (32 - Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3139 | __ add(scratch2, scratch2, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3140 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3141 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3142 | __ and_(scratch2, scratch1, Operand(scratch2, LSR, Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3143 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3144 | // Scale the index by multiplying by the entry size. |
| 3145 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3146 | // scratch2 = scratch2 * 3. |
| 3147 | __ add(scratch2, scratch2, Operand(scratch2, LSL, 1)); |
| 3148 | |
| 3149 | // Check if the key is identical to the name. |
| 3150 | __ add(scratch2, elements, Operand(scratch2, LSL, 2)); |
| 3151 | __ ldr(ip, FieldMemOperand(scratch2, kElementsStartOffset)); |
| 3152 | __ cmp(name, Operand(ip)); |
| 3153 | __ b(eq, done); |
| 3154 | } |
| 3155 | |
| 3156 | const int spill_mask = |
| 3157 | (lr.bit() | r6.bit() | r5.bit() | r4.bit() | |
| 3158 | r3.bit() | r2.bit() | r1.bit() | r0.bit()) & |
| 3159 | ~(scratch1.bit() | scratch2.bit()); |
| 3160 | |
| 3161 | __ stm(db_w, sp, spill_mask); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3162 | if (name.is(r0)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3163 | DCHECK(!elements.is(r1)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3164 | __ Move(r1, name); |
| 3165 | __ Move(r0, elements); |
| 3166 | } else { |
| 3167 | __ Move(r0, elements); |
| 3168 | __ Move(r1, name); |
| 3169 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3170 | NameDictionaryLookupStub stub(masm->isolate(), POSITIVE_LOOKUP); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3171 | __ CallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3172 | __ cmp(r0, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3173 | __ mov(scratch2, Operand(r2)); |
| 3174 | __ ldm(ia_w, sp, spill_mask); |
| 3175 | |
| 3176 | __ b(ne, done); |
| 3177 | __ b(eq, miss); |
| 3178 | } |
| 3179 | |
| 3180 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3181 | void NameDictionaryLookupStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3182 | // This stub overrides SometimesSetsUpAFrame() to return false. That means |
| 3183 | // we cannot call anything that could cause a GC from this stub. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3184 | // Registers: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3185 | // result: NameDictionary to probe |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3186 | // r1: key |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3187 | // dictionary: NameDictionary to probe. |
| 3188 | // index: will hold an index of entry if lookup is successful. |
| 3189 | // might alias with result_. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3190 | // Returns: |
| 3191 | // result_ is zero if lookup failed, non zero otherwise. |
| 3192 | |
| 3193 | Register result = r0; |
| 3194 | Register dictionary = r0; |
| 3195 | Register key = r1; |
| 3196 | Register index = r2; |
| 3197 | Register mask = r3; |
| 3198 | Register hash = r4; |
| 3199 | Register undefined = r5; |
| 3200 | Register entry_key = r6; |
| 3201 | |
| 3202 | Label in_dictionary, maybe_in_dictionary, not_in_dictionary; |
| 3203 | |
| 3204 | __ ldr(mask, FieldMemOperand(dictionary, kCapacityOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3205 | __ SmiUntag(mask); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3206 | __ sub(mask, mask, Operand(1)); |
| 3207 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3208 | __ ldr(hash, FieldMemOperand(key, Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3209 | |
| 3210 | __ LoadRoot(undefined, Heap::kUndefinedValueRootIndex); |
| 3211 | |
| 3212 | for (int i = kInlinedProbes; i < kTotalProbes; i++) { |
| 3213 | // Compute the masked index: (hash + i + i * i) & mask. |
| 3214 | // Capacity is smi 2^n. |
| 3215 | if (i > 0) { |
| 3216 | // Add the probe offset (i + i * i) left shifted to avoid right shifting |
| 3217 | // the hash in a separate instruction. The value hash + i + i * i is right |
| 3218 | // shifted in the following and instruction. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3219 | DCHECK(NameDictionary::GetProbeOffset(i) < |
| 3220 | 1 << (32 - Name::kHashFieldOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3221 | __ add(index, hash, Operand( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3222 | NameDictionary::GetProbeOffset(i) << Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3223 | } else { |
| 3224 | __ mov(index, Operand(hash)); |
| 3225 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3226 | __ and_(index, mask, Operand(index, LSR, Name::kHashShift)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3227 | |
| 3228 | // Scale the index by multiplying by the entry size. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3229 | STATIC_ASSERT(NameDictionary::kEntrySize == 3); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3230 | __ add(index, index, Operand(index, LSL, 1)); // index *= 3. |
| 3231 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3232 | STATIC_ASSERT(kSmiTagSize == 1); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3233 | __ add(index, dictionary, Operand(index, LSL, 2)); |
| 3234 | __ ldr(entry_key, FieldMemOperand(index, kElementsStartOffset)); |
| 3235 | |
| 3236 | // Having undefined at this place means the name is not contained. |
| 3237 | __ cmp(entry_key, Operand(undefined)); |
| 3238 | __ b(eq, ¬_in_dictionary); |
| 3239 | |
| 3240 | // Stop if found the property. |
| 3241 | __ cmp(entry_key, Operand(key)); |
| 3242 | __ b(eq, &in_dictionary); |
| 3243 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3244 | if (i != kTotalProbes - 1 && mode() == NEGATIVE_LOOKUP) { |
| 3245 | // Check if the entry name is not a unique name. |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3246 | __ ldr(entry_key, FieldMemOperand(entry_key, HeapObject::kMapOffset)); |
| 3247 | __ ldrb(entry_key, |
| 3248 | FieldMemOperand(entry_key, Map::kInstanceTypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3249 | __ JumpIfNotUniqueNameInstanceType(entry_key, &maybe_in_dictionary); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3250 | } |
| 3251 | } |
| 3252 | |
| 3253 | __ bind(&maybe_in_dictionary); |
| 3254 | // If we are doing negative lookup then probing failure should be |
| 3255 | // treated as a lookup success. For positive lookup probing failure |
| 3256 | // should be treated as lookup failure. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3257 | if (mode() == POSITIVE_LOOKUP) { |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3258 | __ mov(result, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3259 | __ Ret(); |
| 3260 | } |
| 3261 | |
| 3262 | __ bind(&in_dictionary); |
| 3263 | __ mov(result, Operand(1)); |
| 3264 | __ Ret(); |
| 3265 | |
| 3266 | __ bind(¬_in_dictionary); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 3267 | __ mov(result, Operand::Zero()); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 3268 | __ Ret(); |
| 3269 | } |
| 3270 | |
| 3271 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3272 | void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime( |
| 3273 | Isolate* isolate) { |
| 3274 | StoreBufferOverflowStub stub1(isolate, kDontSaveFPRegs); |
| 3275 | stub1.GetCode(); |
| 3276 | // Hydrogen code stubs need stub2 at snapshot time. |
| 3277 | StoreBufferOverflowStub stub2(isolate, kSaveFPRegs); |
| 3278 | stub2.GetCode(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3279 | } |
| 3280 | |
| 3281 | |
| 3282 | // Takes the input in 3 registers: address_ value_ and object_. A pointer to |
| 3283 | // the value has just been written into the object, now this stub makes sure |
| 3284 | // we keep the GC informed. The word in the object where the value has been |
| 3285 | // written is in the address register. |
| 3286 | void RecordWriteStub::Generate(MacroAssembler* masm) { |
| 3287 | Label skip_to_incremental_noncompacting; |
| 3288 | Label skip_to_incremental_compacting; |
| 3289 | |
| 3290 | // The first two instructions are generated with labels so as to get the |
| 3291 | // offset fixed up correctly by the bind(Label*) call. We patch it back and |
| 3292 | // forth between a compare instructions (a nop in this position) and the |
| 3293 | // real branch when we start and stop incremental heap marking. |
| 3294 | // See RecordWriteStub::Patch for details. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3295 | { |
| 3296 | // Block literal pool emission, as the position of these two instructions |
| 3297 | // is assumed by the patching code. |
| 3298 | Assembler::BlockConstPoolScope block_const_pool(masm); |
| 3299 | __ b(&skip_to_incremental_noncompacting); |
| 3300 | __ b(&skip_to_incremental_compacting); |
| 3301 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3302 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3303 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
| 3304 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3305 | MacroAssembler::kReturnAtEnd); |
| 3306 | } |
| 3307 | __ Ret(); |
| 3308 | |
| 3309 | __ bind(&skip_to_incremental_noncompacting); |
| 3310 | GenerateIncremental(masm, INCREMENTAL); |
| 3311 | |
| 3312 | __ bind(&skip_to_incremental_compacting); |
| 3313 | GenerateIncremental(masm, INCREMENTAL_COMPACTION); |
| 3314 | |
| 3315 | // Initial mode of the stub is expected to be STORE_BUFFER_ONLY. |
| 3316 | // Will be checked in IncrementalMarking::ActivateGeneratedStub. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3317 | DCHECK(Assembler::GetBranchOffset(masm->instr_at(0)) < (1 << 12)); |
| 3318 | DCHECK(Assembler::GetBranchOffset(masm->instr_at(4)) < (1 << 12)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3319 | PatchBranchIntoNop(masm, 0); |
| 3320 | PatchBranchIntoNop(masm, Assembler::kInstrSize); |
| 3321 | } |
| 3322 | |
| 3323 | |
| 3324 | void RecordWriteStub::GenerateIncremental(MacroAssembler* masm, Mode mode) { |
| 3325 | regs_.Save(masm); |
| 3326 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3327 | if (remembered_set_action() == EMIT_REMEMBERED_SET) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3328 | Label dont_need_remembered_set; |
| 3329 | |
| 3330 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 3331 | __ JumpIfNotInNewSpace(regs_.scratch0(), // Value. |
| 3332 | regs_.scratch0(), |
| 3333 | &dont_need_remembered_set); |
| 3334 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 3335 | __ JumpIfInNewSpace(regs_.object(), regs_.scratch0(), |
| 3336 | &dont_need_remembered_set); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3337 | |
| 3338 | // First notify the incremental marker if necessary, then update the |
| 3339 | // remembered set. |
| 3340 | CheckNeedsToInformIncrementalMarker( |
| 3341 | masm, kUpdateRememberedSetOnNoNeedToInformIncrementalMarker, mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3342 | InformIncrementalMarker(masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3343 | regs_.Restore(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3344 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3345 | MacroAssembler::kReturnAtEnd); |
| 3346 | |
| 3347 | __ bind(&dont_need_remembered_set); |
| 3348 | } |
| 3349 | |
| 3350 | CheckNeedsToInformIncrementalMarker( |
| 3351 | masm, kReturnOnNoNeedToInformIncrementalMarker, mode); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3352 | InformIncrementalMarker(masm); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3353 | regs_.Restore(masm); |
| 3354 | __ Ret(); |
| 3355 | } |
| 3356 | |
| 3357 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3358 | void RecordWriteStub::InformIncrementalMarker(MacroAssembler* masm) { |
| 3359 | regs_.SaveCallerSaveRegisters(masm, save_fp_regs_mode()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3360 | int argument_count = 3; |
| 3361 | __ PrepareCallCFunction(argument_count, regs_.scratch0()); |
| 3362 | Register address = |
| 3363 | r0.is(regs_.address()) ? regs_.scratch0() : regs_.address(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3364 | DCHECK(!address.is(regs_.object())); |
| 3365 | DCHECK(!address.is(r0)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3366 | __ Move(address, regs_.address()); |
| 3367 | __ Move(r0, regs_.object()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3368 | __ Move(r1, address); |
| 3369 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3370 | |
| 3371 | AllowExternalCallThatCantCauseGC scope(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3372 | __ CallCFunction( |
| 3373 | ExternalReference::incremental_marking_record_write_function(isolate()), |
| 3374 | argument_count); |
| 3375 | regs_.RestoreCallerSaveRegisters(masm, save_fp_regs_mode()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3376 | } |
| 3377 | |
| 3378 | |
| 3379 | void RecordWriteStub::CheckNeedsToInformIncrementalMarker( |
| 3380 | MacroAssembler* masm, |
| 3381 | OnNoNeedToInformIncrementalMarker on_no_need, |
| 3382 | Mode mode) { |
| 3383 | Label on_black; |
| 3384 | Label need_incremental; |
| 3385 | Label need_incremental_pop_scratch; |
| 3386 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3387 | __ and_(regs_.scratch0(), regs_.object(), Operand(~Page::kPageAlignmentMask)); |
| 3388 | __ ldr(regs_.scratch1(), |
| 3389 | MemOperand(regs_.scratch0(), |
| 3390 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 3391 | __ sub(regs_.scratch1(), regs_.scratch1(), Operand(1), SetCC); |
| 3392 | __ str(regs_.scratch1(), |
| 3393 | MemOperand(regs_.scratch0(), |
| 3394 | MemoryChunk::kWriteBarrierCounterOffset)); |
| 3395 | __ b(mi, &need_incremental); |
| 3396 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3397 | // Let's look at the color of the object: If it is not black we don't have |
| 3398 | // to inform the incremental marker. |
| 3399 | __ JumpIfBlack(regs_.object(), regs_.scratch0(), regs_.scratch1(), &on_black); |
| 3400 | |
| 3401 | regs_.Restore(masm); |
| 3402 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3403 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3404 | MacroAssembler::kReturnAtEnd); |
| 3405 | } else { |
| 3406 | __ Ret(); |
| 3407 | } |
| 3408 | |
| 3409 | __ bind(&on_black); |
| 3410 | |
| 3411 | // Get the value from the slot. |
| 3412 | __ ldr(regs_.scratch0(), MemOperand(regs_.address(), 0)); |
| 3413 | |
| 3414 | if (mode == INCREMENTAL_COMPACTION) { |
| 3415 | Label ensure_not_white; |
| 3416 | |
| 3417 | __ CheckPageFlag(regs_.scratch0(), // Contains value. |
| 3418 | regs_.scratch1(), // Scratch. |
| 3419 | MemoryChunk::kEvacuationCandidateMask, |
| 3420 | eq, |
| 3421 | &ensure_not_white); |
| 3422 | |
| 3423 | __ CheckPageFlag(regs_.object(), |
| 3424 | regs_.scratch1(), // Scratch. |
| 3425 | MemoryChunk::kSkipEvacuationSlotsRecordingMask, |
| 3426 | eq, |
| 3427 | &need_incremental); |
| 3428 | |
| 3429 | __ bind(&ensure_not_white); |
| 3430 | } |
| 3431 | |
| 3432 | // We need extra registers for this, so we push the object and the address |
| 3433 | // register temporarily. |
| 3434 | __ Push(regs_.object(), regs_.address()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3435 | __ JumpIfWhite(regs_.scratch0(), // The value. |
| 3436 | regs_.scratch1(), // Scratch. |
| 3437 | regs_.object(), // Scratch. |
| 3438 | regs_.address(), // Scratch. |
| 3439 | &need_incremental_pop_scratch); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3440 | __ Pop(regs_.object(), regs_.address()); |
| 3441 | |
| 3442 | regs_.Restore(masm); |
| 3443 | if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3444 | __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(), |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 3445 | MacroAssembler::kReturnAtEnd); |
| 3446 | } else { |
| 3447 | __ Ret(); |
| 3448 | } |
| 3449 | |
| 3450 | __ bind(&need_incremental_pop_scratch); |
| 3451 | __ Pop(regs_.object(), regs_.address()); |
| 3452 | |
| 3453 | __ bind(&need_incremental); |
| 3454 | |
| 3455 | // Fall through when we need to inform the incremental marker. |
| 3456 | } |
| 3457 | |
| 3458 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3459 | void StubFailureTrampolineStub::Generate(MacroAssembler* masm) { |
| 3460 | CEntryStub ces(isolate(), 1, kSaveFPRegs); |
| 3461 | __ Call(ces.GetCode(), RelocInfo::CODE_TARGET); |
| 3462 | int parameter_count_offset = |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 3463 | StubFailureTrampolineFrameConstants::kArgumentsLengthOffset; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3464 | __ ldr(r1, MemOperand(fp, parameter_count_offset)); |
| 3465 | if (function_mode() == JS_FUNCTION_STUB_MODE) { |
| 3466 | __ add(r1, r1, Operand(1)); |
| 3467 | } |
| 3468 | masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE); |
| 3469 | __ mov(r1, Operand(r1, LSL, kPointerSizeLog2)); |
| 3470 | __ add(sp, sp, r1); |
| 3471 | __ Ret(); |
| 3472 | } |
| 3473 | |
| 3474 | |
| 3475 | void LoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3476 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3477 | LoadICStub stub(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3478 | stub.GenerateForTrampoline(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3479 | } |
| 3480 | |
| 3481 | |
| 3482 | void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3483 | __ EmitLoadTypeFeedbackVector(LoadWithVectorDescriptor::VectorRegister()); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 3484 | KeyedLoadICStub stub(isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3485 | stub.GenerateForTrampoline(masm); |
| 3486 | } |
| 3487 | |
| 3488 | |
| 3489 | void CallICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3490 | __ EmitLoadTypeFeedbackVector(r2); |
| 3491 | CallICStub stub(isolate(), state()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3492 | __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET); |
| 3493 | } |
| 3494 | |
| 3495 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3496 | void LoadICStub::Generate(MacroAssembler* masm) { GenerateImpl(masm, false); } |
| 3497 | |
| 3498 | |
| 3499 | void LoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3500 | GenerateImpl(masm, true); |
| 3501 | } |
| 3502 | |
| 3503 | |
| 3504 | static void HandleArrayCases(MacroAssembler* masm, Register feedback, |
| 3505 | Register receiver_map, Register scratch1, |
| 3506 | Register scratch2, bool is_polymorphic, |
| 3507 | Label* miss) { |
| 3508 | // feedback initially contains the feedback array |
| 3509 | Label next_loop, prepare_next; |
| 3510 | Label start_polymorphic; |
| 3511 | |
| 3512 | Register cached_map = scratch1; |
| 3513 | |
| 3514 | __ ldr(cached_map, |
| 3515 | FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(0))); |
| 3516 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3517 | __ cmp(receiver_map, cached_map); |
| 3518 | __ b(ne, &start_polymorphic); |
| 3519 | // found, now call handler. |
| 3520 | Register handler = feedback; |
| 3521 | __ ldr(handler, FieldMemOperand(feedback, FixedArray::OffsetOfElementAt(1))); |
| 3522 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3523 | |
| 3524 | |
| 3525 | Register length = scratch2; |
| 3526 | __ bind(&start_polymorphic); |
| 3527 | __ ldr(length, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 3528 | if (!is_polymorphic) { |
| 3529 | // If the IC could be monomorphic we have to make sure we don't go past the |
| 3530 | // end of the feedback array. |
| 3531 | __ cmp(length, Operand(Smi::FromInt(2))); |
| 3532 | __ b(eq, miss); |
| 3533 | } |
| 3534 | |
| 3535 | Register too_far = length; |
| 3536 | Register pointer_reg = feedback; |
| 3537 | |
| 3538 | // +-----+------+------+-----+-----+ ... ----+ |
| 3539 | // | map | len | wm0 | h0 | wm1 | hN | |
| 3540 | // +-----+------+------+-----+-----+ ... ----+ |
| 3541 | // 0 1 2 len-1 |
| 3542 | // ^ ^ |
| 3543 | // | | |
| 3544 | // pointer_reg too_far |
| 3545 | // aka feedback scratch2 |
| 3546 | // also need receiver_map |
| 3547 | // use cached_map (scratch1) to look in the weak map values. |
| 3548 | __ add(too_far, feedback, Operand::PointerOffsetFromSmiKey(length)); |
| 3549 | __ add(too_far, too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 3550 | __ add(pointer_reg, feedback, |
| 3551 | Operand(FixedArray::OffsetOfElementAt(2) - kHeapObjectTag)); |
| 3552 | |
| 3553 | __ bind(&next_loop); |
| 3554 | __ ldr(cached_map, MemOperand(pointer_reg)); |
| 3555 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3556 | __ cmp(receiver_map, cached_map); |
| 3557 | __ b(ne, &prepare_next); |
| 3558 | __ ldr(handler, MemOperand(pointer_reg, kPointerSize)); |
| 3559 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3560 | |
| 3561 | __ bind(&prepare_next); |
| 3562 | __ add(pointer_reg, pointer_reg, Operand(kPointerSize * 2)); |
| 3563 | __ cmp(pointer_reg, too_far); |
| 3564 | __ b(lt, &next_loop); |
| 3565 | |
| 3566 | // We exhausted our array of map handler pairs. |
| 3567 | __ jmp(miss); |
| 3568 | } |
| 3569 | |
| 3570 | |
| 3571 | static void HandleMonomorphicCase(MacroAssembler* masm, Register receiver, |
| 3572 | Register receiver_map, Register feedback, |
| 3573 | Register vector, Register slot, |
| 3574 | Register scratch, Label* compare_map, |
| 3575 | Label* load_smi_map, Label* try_array) { |
| 3576 | __ JumpIfSmi(receiver, load_smi_map); |
| 3577 | __ ldr(receiver_map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 3578 | __ bind(compare_map); |
| 3579 | Register cached_map = scratch; |
| 3580 | // Move the weak map into the weak_cell register. |
| 3581 | __ ldr(cached_map, FieldMemOperand(feedback, WeakCell::kValueOffset)); |
| 3582 | __ cmp(cached_map, receiver_map); |
| 3583 | __ b(ne, try_array); |
| 3584 | Register handler = feedback; |
| 3585 | __ add(handler, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3586 | __ ldr(handler, |
| 3587 | FieldMemOperand(handler, FixedArray::kHeaderSize + kPointerSize)); |
| 3588 | __ add(pc, handler, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3589 | } |
| 3590 | |
| 3591 | |
| 3592 | void LoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3593 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r1 |
| 3594 | Register name = LoadWithVectorDescriptor::NameRegister(); // r2 |
| 3595 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // r3 |
| 3596 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // r0 |
| 3597 | Register feedback = r4; |
| 3598 | Register receiver_map = r5; |
| 3599 | Register scratch1 = r6; |
| 3600 | |
| 3601 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3602 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3603 | |
| 3604 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3605 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3606 | // at WeakCell::kValueOffset. |
| 3607 | Label try_array, load_smi_map, compare_map; |
| 3608 | Label not_array, miss; |
| 3609 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3610 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3611 | |
| 3612 | // Is it a fixed array? |
| 3613 | __ bind(&try_array); |
| 3614 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3615 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 3616 | __ b(ne, ¬_array); |
| 3617 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| 3618 | |
| 3619 | __ bind(¬_array); |
| 3620 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 3621 | __ b(ne, &miss); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 3622 | Code::Flags code_flags = |
| 3623 | Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::LOAD_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3624 | masm->isolate()->stub_cache()->GenerateProbe(masm, Code::LOAD_IC, code_flags, |
| 3625 | receiver, name, feedback, |
| 3626 | receiver_map, scratch1, r9); |
| 3627 | |
| 3628 | __ bind(&miss); |
| 3629 | LoadIC::GenerateMiss(masm); |
| 3630 | |
| 3631 | __ bind(&load_smi_map); |
| 3632 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3633 | __ jmp(&compare_map); |
| 3634 | } |
| 3635 | |
| 3636 | |
| 3637 | void KeyedLoadICStub::Generate(MacroAssembler* masm) { |
| 3638 | GenerateImpl(masm, false); |
| 3639 | } |
| 3640 | |
| 3641 | |
| 3642 | void KeyedLoadICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3643 | GenerateImpl(masm, true); |
| 3644 | } |
| 3645 | |
| 3646 | |
| 3647 | void KeyedLoadICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3648 | Register receiver = LoadWithVectorDescriptor::ReceiverRegister(); // r1 |
| 3649 | Register key = LoadWithVectorDescriptor::NameRegister(); // r2 |
| 3650 | Register vector = LoadWithVectorDescriptor::VectorRegister(); // r3 |
| 3651 | Register slot = LoadWithVectorDescriptor::SlotRegister(); // r0 |
| 3652 | Register feedback = r4; |
| 3653 | Register receiver_map = r5; |
| 3654 | Register scratch1 = r6; |
| 3655 | |
| 3656 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3657 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3658 | |
| 3659 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3660 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3661 | // at WeakCell::kValueOffset. |
| 3662 | Label try_array, load_smi_map, compare_map; |
| 3663 | Label not_array, miss; |
| 3664 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3665 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3666 | |
| 3667 | __ bind(&try_array); |
| 3668 | // Is it a fixed array? |
| 3669 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3670 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 3671 | __ b(ne, ¬_array); |
| 3672 | |
| 3673 | // We have a polymorphic element handler. |
| 3674 | Label polymorphic, try_poly_name; |
| 3675 | __ bind(&polymorphic); |
| 3676 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, true, &miss); |
| 3677 | |
| 3678 | __ bind(¬_array); |
| 3679 | // Is it generic? |
| 3680 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 3681 | __ b(ne, &try_poly_name); |
| 3682 | Handle<Code> megamorphic_stub = |
| 3683 | KeyedLoadIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 3684 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 3685 | |
| 3686 | __ bind(&try_poly_name); |
| 3687 | // We might have a name in feedback, and a fixed array in the next slot. |
| 3688 | __ cmp(key, feedback); |
| 3689 | __ b(ne, &miss); |
| 3690 | // If the name comparison succeeded, we know we have a fixed array with |
| 3691 | // at least one map/handler pair. |
| 3692 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3693 | __ ldr(feedback, |
| 3694 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 3695 | HandleArrayCases(masm, feedback, receiver_map, scratch1, r9, false, &miss); |
| 3696 | |
| 3697 | __ bind(&miss); |
| 3698 | KeyedLoadIC::GenerateMiss(masm); |
| 3699 | |
| 3700 | __ bind(&load_smi_map); |
| 3701 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3702 | __ jmp(&compare_map); |
| 3703 | } |
| 3704 | |
| 3705 | |
| 3706 | void VectorStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3707 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 3708 | VectorStoreICStub stub(isolate(), state()); |
| 3709 | stub.GenerateForTrampoline(masm); |
| 3710 | } |
| 3711 | |
| 3712 | |
| 3713 | void VectorKeyedStoreICTrampolineStub::Generate(MacroAssembler* masm) { |
| 3714 | __ EmitLoadTypeFeedbackVector(VectorStoreICDescriptor::VectorRegister()); |
| 3715 | VectorKeyedStoreICStub stub(isolate(), state()); |
| 3716 | stub.GenerateForTrampoline(masm); |
| 3717 | } |
| 3718 | |
| 3719 | |
| 3720 | void VectorStoreICStub::Generate(MacroAssembler* masm) { |
| 3721 | GenerateImpl(masm, false); |
| 3722 | } |
| 3723 | |
| 3724 | |
| 3725 | void VectorStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3726 | GenerateImpl(masm, true); |
| 3727 | } |
| 3728 | |
| 3729 | |
| 3730 | void VectorStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3731 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r1 |
| 3732 | Register key = VectorStoreICDescriptor::NameRegister(); // r2 |
| 3733 | Register vector = VectorStoreICDescriptor::VectorRegister(); // r3 |
| 3734 | Register slot = VectorStoreICDescriptor::SlotRegister(); // r4 |
| 3735 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(r0)); // r0 |
| 3736 | Register feedback = r5; |
| 3737 | Register receiver_map = r6; |
| 3738 | Register scratch1 = r9; |
| 3739 | |
| 3740 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3741 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3742 | |
| 3743 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3744 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3745 | // at WeakCell::kValueOffset. |
| 3746 | Label try_array, load_smi_map, compare_map; |
| 3747 | Label not_array, miss; |
| 3748 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3749 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3750 | |
| 3751 | // Is it a fixed array? |
| 3752 | __ bind(&try_array); |
| 3753 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3754 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 3755 | __ b(ne, ¬_array); |
| 3756 | |
| 3757 | // We are using register r8, which is used for the embedded constant pool |
| 3758 | // when FLAG_enable_embedded_constant_pool is true. |
| 3759 | DCHECK(!FLAG_enable_embedded_constant_pool); |
| 3760 | Register scratch2 = r8; |
| 3761 | HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, true, |
| 3762 | &miss); |
| 3763 | |
| 3764 | __ bind(¬_array); |
| 3765 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 3766 | __ b(ne, &miss); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 3767 | Code::Flags code_flags = |
| 3768 | Code::RemoveHolderFromFlags(Code::ComputeHandlerFlags(Code::STORE_IC)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3769 | masm->isolate()->stub_cache()->GenerateProbe( |
| 3770 | masm, Code::STORE_IC, code_flags, receiver, key, feedback, receiver_map, |
| 3771 | scratch1, scratch2); |
| 3772 | |
| 3773 | __ bind(&miss); |
| 3774 | StoreIC::GenerateMiss(masm); |
| 3775 | |
| 3776 | __ bind(&load_smi_map); |
| 3777 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3778 | __ jmp(&compare_map); |
| 3779 | } |
| 3780 | |
| 3781 | |
| 3782 | void VectorKeyedStoreICStub::Generate(MacroAssembler* masm) { |
| 3783 | GenerateImpl(masm, false); |
| 3784 | } |
| 3785 | |
| 3786 | |
| 3787 | void VectorKeyedStoreICStub::GenerateForTrampoline(MacroAssembler* masm) { |
| 3788 | GenerateImpl(masm, true); |
| 3789 | } |
| 3790 | |
| 3791 | |
| 3792 | static void HandlePolymorphicStoreCase(MacroAssembler* masm, Register feedback, |
| 3793 | Register receiver_map, Register scratch1, |
| 3794 | Register scratch2, Label* miss) { |
| 3795 | // feedback initially contains the feedback array |
| 3796 | Label next_loop, prepare_next; |
| 3797 | Label start_polymorphic; |
| 3798 | Label transition_call; |
| 3799 | |
| 3800 | Register cached_map = scratch1; |
| 3801 | Register too_far = scratch2; |
| 3802 | Register pointer_reg = feedback; |
| 3803 | __ ldr(too_far, FieldMemOperand(feedback, FixedArray::kLengthOffset)); |
| 3804 | |
| 3805 | // +-----+------+------+-----+-----+-----+ ... ----+ |
| 3806 | // | map | len | wm0 | wt0 | h0 | wm1 | hN | |
| 3807 | // +-----+------+------+-----+-----+ ----+ ... ----+ |
| 3808 | // 0 1 2 len-1 |
| 3809 | // ^ ^ |
| 3810 | // | | |
| 3811 | // pointer_reg too_far |
| 3812 | // aka feedback scratch2 |
| 3813 | // also need receiver_map |
| 3814 | // use cached_map (scratch1) to look in the weak map values. |
| 3815 | __ add(too_far, feedback, Operand::PointerOffsetFromSmiKey(too_far)); |
| 3816 | __ add(too_far, too_far, Operand(FixedArray::kHeaderSize - kHeapObjectTag)); |
| 3817 | __ add(pointer_reg, feedback, |
| 3818 | Operand(FixedArray::OffsetOfElementAt(0) - kHeapObjectTag)); |
| 3819 | |
| 3820 | __ bind(&next_loop); |
| 3821 | __ ldr(cached_map, MemOperand(pointer_reg)); |
| 3822 | __ ldr(cached_map, FieldMemOperand(cached_map, WeakCell::kValueOffset)); |
| 3823 | __ cmp(receiver_map, cached_map); |
| 3824 | __ b(ne, &prepare_next); |
| 3825 | // Is it a transitioning store? |
| 3826 | __ ldr(too_far, MemOperand(pointer_reg, kPointerSize)); |
| 3827 | __ CompareRoot(too_far, Heap::kUndefinedValueRootIndex); |
| 3828 | __ b(ne, &transition_call); |
| 3829 | __ ldr(pointer_reg, MemOperand(pointer_reg, kPointerSize * 2)); |
| 3830 | __ add(pc, pointer_reg, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3831 | |
| 3832 | __ bind(&transition_call); |
| 3833 | __ ldr(too_far, FieldMemOperand(too_far, WeakCell::kValueOffset)); |
| 3834 | __ JumpIfSmi(too_far, miss); |
| 3835 | |
| 3836 | __ ldr(receiver_map, MemOperand(pointer_reg, kPointerSize * 2)); |
| 3837 | |
| 3838 | // Load the map into the correct register. |
| 3839 | DCHECK(feedback.is(VectorStoreTransitionDescriptor::MapRegister())); |
| 3840 | __ mov(feedback, too_far); |
| 3841 | |
| 3842 | __ add(pc, receiver_map, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 3843 | |
| 3844 | __ bind(&prepare_next); |
| 3845 | __ add(pointer_reg, pointer_reg, Operand(kPointerSize * 3)); |
| 3846 | __ cmp(pointer_reg, too_far); |
| 3847 | __ b(lt, &next_loop); |
| 3848 | |
| 3849 | // We exhausted our array of map handler pairs. |
| 3850 | __ jmp(miss); |
| 3851 | } |
| 3852 | |
| 3853 | |
| 3854 | void VectorKeyedStoreICStub::GenerateImpl(MacroAssembler* masm, bool in_frame) { |
| 3855 | Register receiver = VectorStoreICDescriptor::ReceiverRegister(); // r1 |
| 3856 | Register key = VectorStoreICDescriptor::NameRegister(); // r2 |
| 3857 | Register vector = VectorStoreICDescriptor::VectorRegister(); // r3 |
| 3858 | Register slot = VectorStoreICDescriptor::SlotRegister(); // r4 |
| 3859 | DCHECK(VectorStoreICDescriptor::ValueRegister().is(r0)); // r0 |
| 3860 | Register feedback = r5; |
| 3861 | Register receiver_map = r6; |
| 3862 | Register scratch1 = r9; |
| 3863 | |
| 3864 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3865 | __ ldr(feedback, FieldMemOperand(feedback, FixedArray::kHeaderSize)); |
| 3866 | |
| 3867 | // Try to quickly handle the monomorphic case without knowing for sure |
| 3868 | // if we have a weak cell in feedback. We do know it's safe to look |
| 3869 | // at WeakCell::kValueOffset. |
| 3870 | Label try_array, load_smi_map, compare_map; |
| 3871 | Label not_array, miss; |
| 3872 | HandleMonomorphicCase(masm, receiver, receiver_map, feedback, vector, slot, |
| 3873 | scratch1, &compare_map, &load_smi_map, &try_array); |
| 3874 | |
| 3875 | __ bind(&try_array); |
| 3876 | // Is it a fixed array? |
| 3877 | __ ldr(scratch1, FieldMemOperand(feedback, HeapObject::kMapOffset)); |
| 3878 | __ CompareRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 3879 | __ b(ne, ¬_array); |
| 3880 | |
| 3881 | // We have a polymorphic element handler. |
| 3882 | Label polymorphic, try_poly_name; |
| 3883 | __ bind(&polymorphic); |
| 3884 | |
| 3885 | // We are using register r8, which is used for the embedded constant pool |
| 3886 | // when FLAG_enable_embedded_constant_pool is true. |
| 3887 | DCHECK(!FLAG_enable_embedded_constant_pool); |
| 3888 | Register scratch2 = r8; |
| 3889 | |
| 3890 | HandlePolymorphicStoreCase(masm, feedback, receiver_map, scratch1, scratch2, |
| 3891 | &miss); |
| 3892 | |
| 3893 | __ bind(¬_array); |
| 3894 | // Is it generic? |
| 3895 | __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex); |
| 3896 | __ b(ne, &try_poly_name); |
| 3897 | Handle<Code> megamorphic_stub = |
| 3898 | KeyedStoreIC::ChooseMegamorphicStub(masm->isolate(), GetExtraICState()); |
| 3899 | __ Jump(megamorphic_stub, RelocInfo::CODE_TARGET); |
| 3900 | |
| 3901 | __ bind(&try_poly_name); |
| 3902 | // We might have a name in feedback, and a fixed array in the next slot. |
| 3903 | __ cmp(key, feedback); |
| 3904 | __ b(ne, &miss); |
| 3905 | // If the name comparison succeeded, we know we have a fixed array with |
| 3906 | // at least one map/handler pair. |
| 3907 | __ add(feedback, vector, Operand::PointerOffsetFromSmiKey(slot)); |
| 3908 | __ ldr(feedback, |
| 3909 | FieldMemOperand(feedback, FixedArray::kHeaderSize + kPointerSize)); |
| 3910 | HandleArrayCases(masm, feedback, receiver_map, scratch1, scratch2, false, |
| 3911 | &miss); |
| 3912 | |
| 3913 | __ bind(&miss); |
| 3914 | KeyedStoreIC::GenerateMiss(masm); |
| 3915 | |
| 3916 | __ bind(&load_smi_map); |
| 3917 | __ LoadRoot(receiver_map, Heap::kHeapNumberMapRootIndex); |
| 3918 | __ jmp(&compare_map); |
| 3919 | } |
| 3920 | |
| 3921 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3922 | void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) { |
| 3923 | if (masm->isolate()->function_entry_hook() != NULL) { |
| 3924 | ProfileEntryHookStub stub(masm->isolate()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 3925 | PredictableCodeSizeScope predictable(masm); |
| 3926 | predictable.ExpectSize(masm->CallStubSize(&stub) + |
| 3927 | 2 * Assembler::kInstrSize); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 3928 | __ push(lr); |
| 3929 | __ CallStub(&stub); |
| 3930 | __ pop(lr); |
| 3931 | } |
| 3932 | } |
| 3933 | |
| 3934 | |
| 3935 | void ProfileEntryHookStub::Generate(MacroAssembler* masm) { |
| 3936 | // The entry hook is a "push lr" instruction, followed by a call. |
| 3937 | const int32_t kReturnAddressDistanceFromFunctionStart = |
| 3938 | 3 * Assembler::kInstrSize; |
| 3939 | |
| 3940 | // This should contain all kCallerSaved registers. |
| 3941 | const RegList kSavedRegs = |
| 3942 | 1 << 0 | // r0 |
| 3943 | 1 << 1 | // r1 |
| 3944 | 1 << 2 | // r2 |
| 3945 | 1 << 3 | // r3 |
| 3946 | 1 << 5 | // r5 |
| 3947 | 1 << 9; // r9 |
| 3948 | // We also save lr, so the count here is one higher than the mask indicates. |
| 3949 | const int32_t kNumSavedRegs = 7; |
| 3950 | |
| 3951 | DCHECK((kCallerSaved & kSavedRegs) == kCallerSaved); |
| 3952 | |
| 3953 | // Save all caller-save registers as this may be called from anywhere. |
| 3954 | __ stm(db_w, sp, kSavedRegs | lr.bit()); |
| 3955 | |
| 3956 | // Compute the function's address for the first argument. |
| 3957 | __ sub(r0, lr, Operand(kReturnAddressDistanceFromFunctionStart)); |
| 3958 | |
| 3959 | // The caller's return address is above the saved temporaries. |
| 3960 | // Grab that for the second argument to the hook. |
| 3961 | __ add(r1, sp, Operand(kNumSavedRegs * kPointerSize)); |
| 3962 | |
| 3963 | // Align the stack if necessary. |
| 3964 | int frame_alignment = masm->ActivationFrameAlignment(); |
| 3965 | if (frame_alignment > kPointerSize) { |
| 3966 | __ mov(r5, sp); |
| 3967 | DCHECK(base::bits::IsPowerOfTwo32(frame_alignment)); |
| 3968 | __ and_(sp, sp, Operand(-frame_alignment)); |
| 3969 | } |
| 3970 | |
| 3971 | #if V8_HOST_ARCH_ARM |
| 3972 | int32_t entry_hook = |
| 3973 | reinterpret_cast<int32_t>(isolate()->function_entry_hook()); |
| 3974 | __ mov(ip, Operand(entry_hook)); |
| 3975 | #else |
| 3976 | // Under the simulator we need to indirect the entry hook through a |
| 3977 | // trampoline function at a known address. |
| 3978 | // It additionally takes an isolate as a third parameter |
| 3979 | __ mov(r2, Operand(ExternalReference::isolate_address(isolate()))); |
| 3980 | |
| 3981 | ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline)); |
| 3982 | __ mov(ip, Operand(ExternalReference(&dispatcher, |
| 3983 | ExternalReference::BUILTIN_CALL, |
| 3984 | isolate()))); |
| 3985 | #endif |
| 3986 | __ Call(ip); |
| 3987 | |
| 3988 | // Restore the stack pointer if needed. |
| 3989 | if (frame_alignment > kPointerSize) { |
| 3990 | __ mov(sp, r5); |
| 3991 | } |
| 3992 | |
| 3993 | // Also pop pc to get Ret(0). |
| 3994 | __ ldm(ia_w, sp, kSavedRegs | pc.bit()); |
| 3995 | } |
| 3996 | |
| 3997 | |
| 3998 | template<class T> |
| 3999 | static void CreateArrayDispatch(MacroAssembler* masm, |
| 4000 | AllocationSiteOverrideMode mode) { |
| 4001 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4002 | T stub(masm->isolate(), GetInitialFastElementsKind(), mode); |
| 4003 | __ TailCallStub(&stub); |
| 4004 | } else if (mode == DONT_OVERRIDE) { |
| 4005 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 4006 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4007 | for (int i = 0; i <= last_index; ++i) { |
| 4008 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4009 | __ cmp(r3, Operand(kind)); |
| 4010 | T stub(masm->isolate(), kind); |
| 4011 | __ TailCallStub(&stub, eq); |
| 4012 | } |
| 4013 | |
| 4014 | // If we reached this point there is a problem. |
| 4015 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4016 | } else { |
| 4017 | UNREACHABLE(); |
| 4018 | } |
| 4019 | } |
| 4020 | |
| 4021 | |
| 4022 | static void CreateArrayDispatchOneArgument(MacroAssembler* masm, |
| 4023 | AllocationSiteOverrideMode mode) { |
| 4024 | // r2 - allocation site (if mode != DISABLE_ALLOCATION_SITES) |
| 4025 | // r3 - kind (if mode != DISABLE_ALLOCATION_SITES) |
| 4026 | // r0 - number of arguments |
| 4027 | // r1 - constructor? |
| 4028 | // sp[0] - last argument |
| 4029 | Label normal_sequence; |
| 4030 | if (mode == DONT_OVERRIDE) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4031 | STATIC_ASSERT(FAST_SMI_ELEMENTS == 0); |
| 4032 | STATIC_ASSERT(FAST_HOLEY_SMI_ELEMENTS == 1); |
| 4033 | STATIC_ASSERT(FAST_ELEMENTS == 2); |
| 4034 | STATIC_ASSERT(FAST_HOLEY_ELEMENTS == 3); |
| 4035 | STATIC_ASSERT(FAST_DOUBLE_ELEMENTS == 4); |
| 4036 | STATIC_ASSERT(FAST_HOLEY_DOUBLE_ELEMENTS == 5); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4037 | |
| 4038 | // is the low bit set? If so, we are holey and that is good. |
| 4039 | __ tst(r3, Operand(1)); |
| 4040 | __ b(ne, &normal_sequence); |
| 4041 | } |
| 4042 | |
| 4043 | // look at the first argument |
| 4044 | __ ldr(r5, MemOperand(sp, 0)); |
| 4045 | __ cmp(r5, Operand::Zero()); |
| 4046 | __ b(eq, &normal_sequence); |
| 4047 | |
| 4048 | if (mode == DISABLE_ALLOCATION_SITES) { |
| 4049 | ElementsKind initial = GetInitialFastElementsKind(); |
| 4050 | ElementsKind holey_initial = GetHoleyElementsKind(initial); |
| 4051 | |
| 4052 | ArraySingleArgumentConstructorStub stub_holey(masm->isolate(), |
| 4053 | holey_initial, |
| 4054 | DISABLE_ALLOCATION_SITES); |
| 4055 | __ TailCallStub(&stub_holey); |
| 4056 | |
| 4057 | __ bind(&normal_sequence); |
| 4058 | ArraySingleArgumentConstructorStub stub(masm->isolate(), |
| 4059 | initial, |
| 4060 | DISABLE_ALLOCATION_SITES); |
| 4061 | __ TailCallStub(&stub); |
| 4062 | } else if (mode == DONT_OVERRIDE) { |
| 4063 | // We are going to create a holey array, but our kind is non-holey. |
| 4064 | // Fix kind and retry (only if we have an allocation site in the slot). |
| 4065 | __ add(r3, r3, Operand(1)); |
| 4066 | |
| 4067 | if (FLAG_debug_code) { |
| 4068 | __ ldr(r5, FieldMemOperand(r2, 0)); |
| 4069 | __ CompareRoot(r5, Heap::kAllocationSiteMapRootIndex); |
| 4070 | __ Assert(eq, kExpectedAllocationSite); |
| 4071 | } |
| 4072 | |
| 4073 | // Save the resulting elements kind in type info. We can't just store r3 |
| 4074 | // in the AllocationSite::transition_info field because elements kind is |
| 4075 | // restricted to a portion of the field...upper bits need to be left alone. |
| 4076 | STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| 4077 | __ ldr(r4, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4078 | __ add(r4, r4, Operand(Smi::FromInt(kFastElementsKindPackedToHoley))); |
| 4079 | __ str(r4, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4080 | |
| 4081 | __ bind(&normal_sequence); |
| 4082 | int last_index = GetSequenceIndexFromFastElementsKind( |
| 4083 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4084 | for (int i = 0; i <= last_index; ++i) { |
| 4085 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4086 | __ cmp(r3, Operand(kind)); |
| 4087 | ArraySingleArgumentConstructorStub stub(masm->isolate(), kind); |
| 4088 | __ TailCallStub(&stub, eq); |
| 4089 | } |
| 4090 | |
| 4091 | // If we reached this point there is a problem. |
| 4092 | __ Abort(kUnexpectedElementsKindInArrayConstructor); |
| 4093 | } else { |
| 4094 | UNREACHABLE(); |
| 4095 | } |
| 4096 | } |
| 4097 | |
| 4098 | |
| 4099 | template<class T> |
| 4100 | static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) { |
| 4101 | int to_index = GetSequenceIndexFromFastElementsKind( |
| 4102 | TERMINAL_FAST_ELEMENTS_KIND); |
| 4103 | for (int i = 0; i <= to_index; ++i) { |
| 4104 | ElementsKind kind = GetFastElementsKindFromSequenceIndex(i); |
| 4105 | T stub(isolate, kind); |
| 4106 | stub.GetCode(); |
| 4107 | if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) { |
| 4108 | T stub1(isolate, kind, DISABLE_ALLOCATION_SITES); |
| 4109 | stub1.GetCode(); |
| 4110 | } |
| 4111 | } |
| 4112 | } |
| 4113 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4114 | void CommonArrayConstructorStub::GenerateStubsAheadOfTime(Isolate* isolate) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4115 | ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>( |
| 4116 | isolate); |
| 4117 | ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>( |
| 4118 | isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4119 | ArrayNArgumentsConstructorStub stub(isolate); |
| 4120 | stub.GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4121 | ElementsKind kinds[2] = { FAST_ELEMENTS, FAST_HOLEY_ELEMENTS }; |
| 4122 | for (int i = 0; i < 2; i++) { |
| 4123 | // For internal arrays we only need a few things |
| 4124 | InternalArrayNoArgumentConstructorStub stubh1(isolate, kinds[i]); |
| 4125 | stubh1.GetCode(); |
| 4126 | InternalArraySingleArgumentConstructorStub stubh2(isolate, kinds[i]); |
| 4127 | stubh2.GetCode(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4128 | } |
| 4129 | } |
| 4130 | |
| 4131 | |
| 4132 | void ArrayConstructorStub::GenerateDispatchToArrayStub( |
| 4133 | MacroAssembler* masm, |
| 4134 | AllocationSiteOverrideMode mode) { |
| 4135 | if (argument_count() == ANY) { |
| 4136 | Label not_zero_case, not_one_case; |
| 4137 | __ tst(r0, r0); |
| 4138 | __ b(ne, ¬_zero_case); |
| 4139 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4140 | |
| 4141 | __ bind(¬_zero_case); |
| 4142 | __ cmp(r0, Operand(1)); |
| 4143 | __ b(gt, ¬_one_case); |
| 4144 | CreateArrayDispatchOneArgument(masm, mode); |
| 4145 | |
| 4146 | __ bind(¬_one_case); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4147 | ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| 4148 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4149 | } else if (argument_count() == NONE) { |
| 4150 | CreateArrayDispatch<ArrayNoArgumentConstructorStub>(masm, mode); |
| 4151 | } else if (argument_count() == ONE) { |
| 4152 | CreateArrayDispatchOneArgument(masm, mode); |
| 4153 | } else if (argument_count() == MORE_THAN_ONE) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4154 | ArrayNArgumentsConstructorStub stub(masm->isolate()); |
| 4155 | __ TailCallStub(&stub); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4156 | } else { |
| 4157 | UNREACHABLE(); |
| 4158 | } |
| 4159 | } |
| 4160 | |
| 4161 | |
| 4162 | void ArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4163 | // ----------- S t a t e ------------- |
| 4164 | // -- r0 : argc (only if argument_count() == ANY) |
| 4165 | // -- r1 : constructor |
| 4166 | // -- r2 : AllocationSite or undefined |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4167 | // -- r3 : new target |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4168 | // -- sp[0] : return address |
| 4169 | // -- sp[4] : last argument |
| 4170 | // ----------------------------------- |
| 4171 | |
| 4172 | if (FLAG_debug_code) { |
| 4173 | // The array construct code is only set for the global and natives |
| 4174 | // builtin Array functions which always have maps. |
| 4175 | |
| 4176 | // Initial map for the builtin Array function should be a map. |
| 4177 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4178 | // Will both indicate a NULL and a Smi. |
| 4179 | __ tst(r4, Operand(kSmiTagMask)); |
| 4180 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| 4181 | __ CompareObjectType(r4, r4, r5, MAP_TYPE); |
| 4182 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| 4183 | |
| 4184 | // We should either have undefined in r2 or a valid AllocationSite |
| 4185 | __ AssertUndefinedOrAllocationSite(r2, r4); |
| 4186 | } |
| 4187 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4188 | // Enter the context of the Array function. |
| 4189 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 4190 | |
| 4191 | Label subclassing; |
| 4192 | __ cmp(r3, r1); |
| 4193 | __ b(ne, &subclassing); |
| 4194 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4195 | Label no_info; |
| 4196 | // Get the elements kind and case on that. |
| 4197 | __ CompareRoot(r2, Heap::kUndefinedValueRootIndex); |
| 4198 | __ b(eq, &no_info); |
| 4199 | |
| 4200 | __ ldr(r3, FieldMemOperand(r2, AllocationSite::kTransitionInfoOffset)); |
| 4201 | __ SmiUntag(r3); |
| 4202 | STATIC_ASSERT(AllocationSite::ElementsKindBits::kShift == 0); |
| 4203 | __ and_(r3, r3, Operand(AllocationSite::ElementsKindBits::kMask)); |
| 4204 | GenerateDispatchToArrayStub(masm, DONT_OVERRIDE); |
| 4205 | |
| 4206 | __ bind(&no_info); |
| 4207 | GenerateDispatchToArrayStub(masm, DISABLE_ALLOCATION_SITES); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4208 | |
| 4209 | __ bind(&subclassing); |
| 4210 | switch (argument_count()) { |
| 4211 | case ANY: |
| 4212 | case MORE_THAN_ONE: |
| 4213 | __ str(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
| 4214 | __ add(r0, r0, Operand(3)); |
| 4215 | break; |
| 4216 | case NONE: |
| 4217 | __ str(r1, MemOperand(sp, 0 * kPointerSize)); |
| 4218 | __ mov(r0, Operand(3)); |
| 4219 | break; |
| 4220 | case ONE: |
| 4221 | __ str(r1, MemOperand(sp, 1 * kPointerSize)); |
| 4222 | __ mov(r0, Operand(4)); |
| 4223 | break; |
| 4224 | } |
| 4225 | __ Push(r3, r2); |
| 4226 | __ JumpToExternalReference(ExternalReference(Runtime::kNewArray, isolate())); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4227 | } |
| 4228 | |
| 4229 | |
| 4230 | void InternalArrayConstructorStub::GenerateCase( |
| 4231 | MacroAssembler* masm, ElementsKind kind) { |
| 4232 | __ cmp(r0, Operand(1)); |
| 4233 | |
| 4234 | InternalArrayNoArgumentConstructorStub stub0(isolate(), kind); |
| 4235 | __ TailCallStub(&stub0, lo); |
| 4236 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4237 | ArrayNArgumentsConstructorStub stubN(isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 4238 | __ TailCallStub(&stubN, hi); |
| 4239 | |
| 4240 | if (IsFastPackedElementsKind(kind)) { |
| 4241 | // We might need to create a holey array |
| 4242 | // look at the first argument |
| 4243 | __ ldr(r3, MemOperand(sp, 0)); |
| 4244 | __ cmp(r3, Operand::Zero()); |
| 4245 | |
| 4246 | InternalArraySingleArgumentConstructorStub |
| 4247 | stub1_holey(isolate(), GetHoleyElementsKind(kind)); |
| 4248 | __ TailCallStub(&stub1_holey, ne); |
| 4249 | } |
| 4250 | |
| 4251 | InternalArraySingleArgumentConstructorStub stub1(isolate(), kind); |
| 4252 | __ TailCallStub(&stub1); |
| 4253 | } |
| 4254 | |
| 4255 | |
| 4256 | void InternalArrayConstructorStub::Generate(MacroAssembler* masm) { |
| 4257 | // ----------- S t a t e ------------- |
| 4258 | // -- r0 : argc |
| 4259 | // -- r1 : constructor |
| 4260 | // -- sp[0] : return address |
| 4261 | // -- sp[4] : last argument |
| 4262 | // ----------------------------------- |
| 4263 | |
| 4264 | if (FLAG_debug_code) { |
| 4265 | // The array construct code is only set for the global and natives |
| 4266 | // builtin Array functions which always have maps. |
| 4267 | |
| 4268 | // Initial map for the builtin Array function should be a map. |
| 4269 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4270 | // Will both indicate a NULL and a Smi. |
| 4271 | __ tst(r3, Operand(kSmiTagMask)); |
| 4272 | __ Assert(ne, kUnexpectedInitialMapForArrayFunction); |
| 4273 | __ CompareObjectType(r3, r3, r4, MAP_TYPE); |
| 4274 | __ Assert(eq, kUnexpectedInitialMapForArrayFunction); |
| 4275 | } |
| 4276 | |
| 4277 | // Figure out the right elements kind |
| 4278 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4279 | // Load the map's "bit field 2" into |result|. We only need the first byte, |
| 4280 | // but the following bit field extraction takes care of that anyway. |
| 4281 | __ ldr(r3, FieldMemOperand(r3, Map::kBitField2Offset)); |
| 4282 | // Retrieve elements_kind from bit field 2. |
| 4283 | __ DecodeField<Map::ElementsKindBits>(r3); |
| 4284 | |
| 4285 | if (FLAG_debug_code) { |
| 4286 | Label done; |
| 4287 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
| 4288 | __ b(eq, &done); |
| 4289 | __ cmp(r3, Operand(FAST_HOLEY_ELEMENTS)); |
| 4290 | __ Assert(eq, |
| 4291 | kInvalidElementsKindForInternalArrayOrInternalPackedArray); |
| 4292 | __ bind(&done); |
| 4293 | } |
| 4294 | |
| 4295 | Label fast_elements_case; |
| 4296 | __ cmp(r3, Operand(FAST_ELEMENTS)); |
| 4297 | __ b(eq, &fast_elements_case); |
| 4298 | GenerateCase(masm, FAST_HOLEY_ELEMENTS); |
| 4299 | |
| 4300 | __ bind(&fast_elements_case); |
| 4301 | GenerateCase(masm, FAST_ELEMENTS); |
| 4302 | } |
| 4303 | |
| 4304 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4305 | void FastNewObjectStub::Generate(MacroAssembler* masm) { |
| 4306 | // ----------- S t a t e ------------- |
| 4307 | // -- r1 : target |
| 4308 | // -- r3 : new target |
| 4309 | // -- cp : context |
| 4310 | // -- lr : return address |
| 4311 | // ----------------------------------- |
| 4312 | __ AssertFunction(r1); |
| 4313 | __ AssertReceiver(r3); |
| 4314 | |
| 4315 | // Verify that the new target is a JSFunction. |
| 4316 | Label new_object; |
| 4317 | __ CompareObjectType(r3, r2, r2, JS_FUNCTION_TYPE); |
| 4318 | __ b(ne, &new_object); |
| 4319 | |
| 4320 | // Load the initial map and verify that it's in fact a map. |
| 4321 | __ ldr(r2, FieldMemOperand(r3, JSFunction::kPrototypeOrInitialMapOffset)); |
| 4322 | __ JumpIfSmi(r2, &new_object); |
| 4323 | __ CompareObjectType(r2, r0, r0, MAP_TYPE); |
| 4324 | __ b(ne, &new_object); |
| 4325 | |
| 4326 | // Fall back to runtime if the target differs from the new target's |
| 4327 | // initial map constructor. |
| 4328 | __ ldr(r0, FieldMemOperand(r2, Map::kConstructorOrBackPointerOffset)); |
| 4329 | __ cmp(r0, r1); |
| 4330 | __ b(ne, &new_object); |
| 4331 | |
| 4332 | // Allocate the JSObject on the heap. |
| 4333 | Label allocate, done_allocate; |
| 4334 | __ ldrb(r4, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 4335 | __ Allocate(r4, r0, r5, r6, &allocate, SIZE_IN_WORDS); |
| 4336 | __ bind(&done_allocate); |
| 4337 | |
| 4338 | // Initialize the JSObject fields. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4339 | __ str(r2, FieldMemOperand(r0, JSObject::kMapOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4340 | __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4341 | __ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 4342 | __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4343 | STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4344 | __ add(r1, r0, Operand(JSObject::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4345 | |
| 4346 | // ----------- S t a t e ------------- |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4347 | // -- r0 : result (tagged) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4348 | // -- r1 : result fields (untagged) |
| 4349 | // -- r5 : result end (untagged) |
| 4350 | // -- r2 : initial map |
| 4351 | // -- cp : context |
| 4352 | // -- lr : return address |
| 4353 | // ----------------------------------- |
| 4354 | |
| 4355 | // Perform in-object slack tracking if requested. |
| 4356 | Label slack_tracking; |
| 4357 | STATIC_ASSERT(Map::kNoSlackTracking == 0); |
| 4358 | __ LoadRoot(r6, Heap::kUndefinedValueRootIndex); |
| 4359 | __ ldr(r3, FieldMemOperand(r2, Map::kBitField3Offset)); |
| 4360 | __ tst(r3, Operand(Map::ConstructionCounter::kMask)); |
| 4361 | __ b(ne, &slack_tracking); |
| 4362 | { |
| 4363 | // Initialize all in-object fields with undefined. |
| 4364 | __ InitializeFieldsWithFiller(r1, r5, r6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4365 | __ Ret(); |
| 4366 | } |
| 4367 | __ bind(&slack_tracking); |
| 4368 | { |
| 4369 | // Decrease generous allocation count. |
| 4370 | STATIC_ASSERT(Map::ConstructionCounter::kNext == 32); |
| 4371 | __ sub(r3, r3, Operand(1 << Map::ConstructionCounter::kShift)); |
| 4372 | __ str(r3, FieldMemOperand(r2, Map::kBitField3Offset)); |
| 4373 | |
| 4374 | // Initialize the in-object fields with undefined. |
| 4375 | __ ldrb(r4, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset)); |
| 4376 | __ sub(r4, r5, Operand(r4, LSL, kPointerSizeLog2)); |
| 4377 | __ InitializeFieldsWithFiller(r1, r4, r6); |
| 4378 | |
| 4379 | // Initialize the remaining (reserved) fields with one pointer filler map. |
| 4380 | __ LoadRoot(r6, Heap::kOnePointerFillerMapRootIndex); |
| 4381 | __ InitializeFieldsWithFiller(r1, r5, r6); |
| 4382 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4383 | // Check if we can finalize the instance size. |
| 4384 | STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1); |
| 4385 | __ tst(r3, Operand(Map::ConstructionCounter::kMask)); |
| 4386 | __ Ret(ne); |
| 4387 | |
| 4388 | // Finalize the instance size. |
| 4389 | { |
| 4390 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 4391 | __ Push(r0, r2); |
| 4392 | __ CallRuntime(Runtime::kFinalizeInstanceSize); |
| 4393 | __ Pop(r0); |
| 4394 | } |
| 4395 | __ Ret(); |
| 4396 | } |
| 4397 | |
| 4398 | // Fall back to %AllocateInNewSpace. |
| 4399 | __ bind(&allocate); |
| 4400 | { |
| 4401 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 4402 | STATIC_ASSERT(kSmiTag == 0); |
| 4403 | STATIC_ASSERT(kSmiTagSize == 1); |
| 4404 | __ mov(r4, Operand(r4, LSL, kPointerSizeLog2 + 1)); |
| 4405 | __ Push(r2, r4); |
| 4406 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4407 | __ Pop(r2); |
| 4408 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4409 | __ ldrb(r5, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 4410 | __ add(r5, r0, Operand(r5, LSL, kPointerSizeLog2)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4411 | STATIC_ASSERT(kHeapObjectTag == 1); |
| 4412 | __ sub(r5, r5, Operand(kHeapObjectTag)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4413 | __ b(&done_allocate); |
| 4414 | |
| 4415 | // Fall back to %NewObject. |
| 4416 | __ bind(&new_object); |
| 4417 | __ Push(r1, r3); |
| 4418 | __ TailCallRuntime(Runtime::kNewObject); |
| 4419 | } |
| 4420 | |
| 4421 | |
| 4422 | void FastNewRestParameterStub::Generate(MacroAssembler* masm) { |
| 4423 | // ----------- S t a t e ------------- |
| 4424 | // -- r1 : function |
| 4425 | // -- cp : context |
| 4426 | // -- fp : frame pointer |
| 4427 | // -- lr : return address |
| 4428 | // ----------------------------------- |
| 4429 | __ AssertFunction(r1); |
| 4430 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4431 | // Make r2 point to the JavaScript frame. |
| 4432 | __ mov(r2, fp); |
| 4433 | if (skip_stub_frame()) { |
| 4434 | // For Ignition we need to skip the handler/stub frame to reach the |
| 4435 | // JavaScript frame for the function. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4436 | __ ldr(r2, MemOperand(r2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4437 | } |
| 4438 | if (FLAG_debug_code) { |
| 4439 | Label ok; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4440 | __ ldr(ip, MemOperand(r2, StandardFrameConstants::kFunctionOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4441 | __ cmp(ip, r1); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4442 | __ b(eq, &ok); |
| 4443 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 4444 | __ bind(&ok); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4445 | } |
| 4446 | |
| 4447 | // Check if we have rest parameters (only possible if we have an |
| 4448 | // arguments adaptor frame below the function frame). |
| 4449 | Label no_rest_parameters; |
| 4450 | __ ldr(r2, MemOperand(r2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4451 | __ ldr(ip, MemOperand(r2, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4452 | __ cmp(ip, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4453 | __ b(ne, &no_rest_parameters); |
| 4454 | |
| 4455 | // Check if the arguments adaptor frame contains more arguments than |
| 4456 | // specified by the function's internal formal parameter count. |
| 4457 | Label rest_parameters; |
| 4458 | __ ldr(r0, MemOperand(r2, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4459 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 4460 | __ ldr(r3, |
| 4461 | FieldMemOperand(r3, SharedFunctionInfo::kFormalParameterCountOffset)); |
| 4462 | __ sub(r0, r0, r3, SetCC); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4463 | __ b(gt, &rest_parameters); |
| 4464 | |
| 4465 | // Return an empty rest parameter array. |
| 4466 | __ bind(&no_rest_parameters); |
| 4467 | { |
| 4468 | // ----------- S t a t e ------------- |
| 4469 | // -- cp : context |
| 4470 | // -- lr : return address |
| 4471 | // ----------------------------------- |
| 4472 | |
| 4473 | // Allocate an empty rest parameter array. |
| 4474 | Label allocate, done_allocate; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4475 | __ Allocate(JSArray::kSize, r0, r1, r2, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4476 | __ bind(&done_allocate); |
| 4477 | |
| 4478 | // Setup the rest parameter array in r0. |
| 4479 | __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, r1); |
| 4480 | __ str(r1, FieldMemOperand(r0, JSArray::kMapOffset)); |
| 4481 | __ LoadRoot(r1, Heap::kEmptyFixedArrayRootIndex); |
| 4482 | __ str(r1, FieldMemOperand(r0, JSArray::kPropertiesOffset)); |
| 4483 | __ str(r1, FieldMemOperand(r0, JSArray::kElementsOffset)); |
| 4484 | __ mov(r1, Operand(0)); |
| 4485 | __ str(r1, FieldMemOperand(r0, JSArray::kLengthOffset)); |
| 4486 | STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| 4487 | __ Ret(); |
| 4488 | |
| 4489 | // Fall back to %AllocateInNewSpace. |
| 4490 | __ bind(&allocate); |
| 4491 | { |
| 4492 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 4493 | __ Push(Smi::FromInt(JSArray::kSize)); |
| 4494 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4495 | } |
| 4496 | __ jmp(&done_allocate); |
| 4497 | } |
| 4498 | |
| 4499 | __ bind(&rest_parameters); |
| 4500 | { |
| 4501 | // Compute the pointer to the first rest parameter (skippping the receiver). |
| 4502 | __ add(r2, r2, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4503 | __ add(r2, r2, |
| 4504 | Operand(StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize)); |
| 4505 | |
| 4506 | // ----------- S t a t e ------------- |
| 4507 | // -- cp : context |
| 4508 | // -- r0 : number of rest parameters (tagged) |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4509 | // -- r1 : function |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4510 | // -- r2 : pointer to first rest parameters |
| 4511 | // -- lr : return address |
| 4512 | // ----------------------------------- |
| 4513 | |
| 4514 | // Allocate space for the rest parameter array plus the backing store. |
| 4515 | Label allocate, done_allocate; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4516 | __ mov(r6, Operand(JSArray::kSize + FixedArray::kHeaderSize)); |
| 4517 | __ add(r6, r6, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4518 | __ Allocate(r6, r3, r4, r5, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4519 | __ bind(&done_allocate); |
| 4520 | |
| 4521 | // Setup the elements array in r3. |
| 4522 | __ LoadRoot(r1, Heap::kFixedArrayMapRootIndex); |
| 4523 | __ str(r1, FieldMemOperand(r3, FixedArray::kMapOffset)); |
| 4524 | __ str(r0, FieldMemOperand(r3, FixedArray::kLengthOffset)); |
| 4525 | __ add(r4, r3, Operand(FixedArray::kHeaderSize)); |
| 4526 | { |
| 4527 | Label loop, done_loop; |
| 4528 | __ add(r1, r4, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4529 | __ bind(&loop); |
| 4530 | __ cmp(r4, r1); |
| 4531 | __ b(eq, &done_loop); |
| 4532 | __ ldr(ip, MemOperand(r2, 1 * kPointerSize, NegPostIndex)); |
| 4533 | __ str(ip, FieldMemOperand(r4, 0 * kPointerSize)); |
| 4534 | __ add(r4, r4, Operand(1 * kPointerSize)); |
| 4535 | __ b(&loop); |
| 4536 | __ bind(&done_loop); |
| 4537 | } |
| 4538 | |
| 4539 | // Setup the rest parameter array in r4. |
| 4540 | __ LoadNativeContextSlot(Context::JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, r1); |
| 4541 | __ str(r1, FieldMemOperand(r4, JSArray::kMapOffset)); |
| 4542 | __ LoadRoot(r1, Heap::kEmptyFixedArrayRootIndex); |
| 4543 | __ str(r1, FieldMemOperand(r4, JSArray::kPropertiesOffset)); |
| 4544 | __ str(r3, FieldMemOperand(r4, JSArray::kElementsOffset)); |
| 4545 | __ str(r0, FieldMemOperand(r4, JSArray::kLengthOffset)); |
| 4546 | STATIC_ASSERT(JSArray::kSize == 4 * kPointerSize); |
| 4547 | __ mov(r0, r4); |
| 4548 | __ Ret(); |
| 4549 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4550 | // Fall back to %AllocateInNewSpace (if not too big). |
| 4551 | Label too_big_for_new_space; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4552 | __ bind(&allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4553 | __ cmp(r6, Operand(Page::kMaxRegularHeapObjectSize)); |
| 4554 | __ b(gt, &too_big_for_new_space); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4555 | { |
| 4556 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4557 | __ SmiTag(r6); |
| 4558 | __ Push(r0, r2, r6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4559 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4560 | __ mov(r3, r0); |
| 4561 | __ Pop(r0, r2); |
| 4562 | } |
| 4563 | __ jmp(&done_allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4564 | |
| 4565 | // Fall back to %NewRestParameter. |
| 4566 | __ bind(&too_big_for_new_space); |
| 4567 | __ push(r1); |
| 4568 | __ TailCallRuntime(Runtime::kNewRestParameter); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4569 | } |
| 4570 | } |
| 4571 | |
| 4572 | |
| 4573 | void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) { |
| 4574 | // ----------- S t a t e ------------- |
| 4575 | // -- r1 : function |
| 4576 | // -- cp : context |
| 4577 | // -- fp : frame pointer |
| 4578 | // -- lr : return address |
| 4579 | // ----------------------------------- |
| 4580 | __ AssertFunction(r1); |
| 4581 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4582 | // Make r9 point to the JavaScript frame. |
| 4583 | __ mov(r9, fp); |
| 4584 | if (skip_stub_frame()) { |
| 4585 | // For Ignition we need to skip the handler/stub frame to reach the |
| 4586 | // JavaScript frame for the function. |
| 4587 | __ ldr(r9, MemOperand(r9, StandardFrameConstants::kCallerFPOffset)); |
| 4588 | } |
| 4589 | if (FLAG_debug_code) { |
| 4590 | Label ok; |
| 4591 | __ ldr(ip, MemOperand(r9, StandardFrameConstants::kFunctionOffset)); |
| 4592 | __ cmp(ip, r1); |
| 4593 | __ b(eq, &ok); |
| 4594 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 4595 | __ bind(&ok); |
| 4596 | } |
| 4597 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4598 | // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub. |
| 4599 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 4600 | __ ldr(r2, |
| 4601 | FieldMemOperand(r2, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4602 | __ add(r3, r9, Operand(r2, LSL, kPointerSizeLog2 - 1)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4603 | __ add(r3, r3, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 4604 | |
| 4605 | // r1 : function |
| 4606 | // r2 : number of parameters (tagged) |
| 4607 | // r3 : parameters pointer |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4608 | // r9 : JavaScript frame pointer |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4609 | // Registers used over whole function: |
| 4610 | // r5 : arguments count (tagged) |
| 4611 | // r6 : mapped parameter count (tagged) |
| 4612 | |
| 4613 | // Check if the calling frame is an arguments adaptor frame. |
| 4614 | Label adaptor_frame, try_allocate, runtime; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4615 | __ ldr(r4, MemOperand(r9, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4616 | __ ldr(r0, MemOperand(r4, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4617 | __ cmp(r0, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4618 | __ b(eq, &adaptor_frame); |
| 4619 | |
| 4620 | // No adaptor, parameter count = argument count. |
| 4621 | __ mov(r5, r2); |
| 4622 | __ mov(r6, r2); |
| 4623 | __ b(&try_allocate); |
| 4624 | |
| 4625 | // We have an adaptor frame. Patch the parameters pointer. |
| 4626 | __ bind(&adaptor_frame); |
| 4627 | __ ldr(r5, MemOperand(r4, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4628 | __ add(r4, r4, Operand(r5, LSL, 1)); |
| 4629 | __ add(r3, r4, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 4630 | |
| 4631 | // r5 = argument count (tagged) |
| 4632 | // r6 = parameter count (tagged) |
| 4633 | // Compute the mapped parameter count = min(r6, r5) in r6. |
| 4634 | __ mov(r6, r2); |
| 4635 | __ cmp(r6, Operand(r5)); |
| 4636 | __ mov(r6, Operand(r5), LeaveCC, gt); |
| 4637 | |
| 4638 | __ bind(&try_allocate); |
| 4639 | |
| 4640 | // Compute the sizes of backing store, parameter map, and arguments object. |
| 4641 | // 1. Parameter map, has 2 extra words containing context and backing store. |
| 4642 | const int kParameterMapHeaderSize = |
| 4643 | FixedArray::kHeaderSize + 2 * kPointerSize; |
| 4644 | // If there are no mapped parameters, we do not need the parameter_map. |
| 4645 | __ cmp(r6, Operand(Smi::FromInt(0))); |
| 4646 | __ mov(r9, Operand::Zero(), LeaveCC, eq); |
| 4647 | __ mov(r9, Operand(r6, LSL, 1), LeaveCC, ne); |
| 4648 | __ add(r9, r9, Operand(kParameterMapHeaderSize), LeaveCC, ne); |
| 4649 | |
| 4650 | // 2. Backing store. |
| 4651 | __ add(r9, r9, Operand(r5, LSL, 1)); |
| 4652 | __ add(r9, r9, Operand(FixedArray::kHeaderSize)); |
| 4653 | |
| 4654 | // 3. Arguments object. |
| 4655 | __ add(r9, r9, Operand(JSSloppyArgumentsObject::kSize)); |
| 4656 | |
| 4657 | // Do the allocation of all three objects in one go. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4658 | __ Allocate(r9, r0, r9, r4, &runtime, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4659 | |
| 4660 | // r0 = address of new object(s) (tagged) |
| 4661 | // r2 = argument count (smi-tagged) |
| 4662 | // Get the arguments boilerplate from the current native context into r4. |
| 4663 | const int kNormalOffset = |
| 4664 | Context::SlotOffset(Context::SLOPPY_ARGUMENTS_MAP_INDEX); |
| 4665 | const int kAliasedOffset = |
| 4666 | Context::SlotOffset(Context::FAST_ALIASED_ARGUMENTS_MAP_INDEX); |
| 4667 | |
| 4668 | __ ldr(r4, NativeContextMemOperand()); |
| 4669 | __ cmp(r6, Operand::Zero()); |
| 4670 | __ ldr(r4, MemOperand(r4, kNormalOffset), eq); |
| 4671 | __ ldr(r4, MemOperand(r4, kAliasedOffset), ne); |
| 4672 | |
| 4673 | // r0 = address of new object (tagged) |
| 4674 | // r2 = argument count (smi-tagged) |
| 4675 | // r4 = address of arguments map (tagged) |
| 4676 | // r6 = mapped parameter count (tagged) |
| 4677 | __ str(r4, FieldMemOperand(r0, JSObject::kMapOffset)); |
| 4678 | __ LoadRoot(r9, Heap::kEmptyFixedArrayRootIndex); |
| 4679 | __ str(r9, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 4680 | __ str(r9, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 4681 | |
| 4682 | // Set up the callee in-object property. |
| 4683 | __ AssertNotSmi(r1); |
| 4684 | __ str(r1, FieldMemOperand(r0, JSSloppyArgumentsObject::kCalleeOffset)); |
| 4685 | |
| 4686 | // Use the length (smi tagged) and set that as an in-object property too. |
| 4687 | __ AssertSmi(r5); |
| 4688 | __ str(r5, FieldMemOperand(r0, JSSloppyArgumentsObject::kLengthOffset)); |
| 4689 | |
| 4690 | // Set up the elements pointer in the allocated arguments object. |
| 4691 | // If we allocated a parameter map, r4 will point there, otherwise |
| 4692 | // it will point to the backing store. |
| 4693 | __ add(r4, r0, Operand(JSSloppyArgumentsObject::kSize)); |
| 4694 | __ str(r4, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 4695 | |
| 4696 | // r0 = address of new object (tagged) |
| 4697 | // r2 = argument count (tagged) |
| 4698 | // r4 = address of parameter map or backing store (tagged) |
| 4699 | // r6 = mapped parameter count (tagged) |
| 4700 | // Initialize parameter map. If there are no mapped arguments, we're done. |
| 4701 | Label skip_parameter_map; |
| 4702 | __ cmp(r6, Operand(Smi::FromInt(0))); |
| 4703 | // Move backing store address to r1, because it is |
| 4704 | // expected there when filling in the unmapped arguments. |
| 4705 | __ mov(r1, r4, LeaveCC, eq); |
| 4706 | __ b(eq, &skip_parameter_map); |
| 4707 | |
| 4708 | __ LoadRoot(r5, Heap::kSloppyArgumentsElementsMapRootIndex); |
| 4709 | __ str(r5, FieldMemOperand(r4, FixedArray::kMapOffset)); |
| 4710 | __ add(r5, r6, Operand(Smi::FromInt(2))); |
| 4711 | __ str(r5, FieldMemOperand(r4, FixedArray::kLengthOffset)); |
| 4712 | __ str(cp, FieldMemOperand(r4, FixedArray::kHeaderSize + 0 * kPointerSize)); |
| 4713 | __ add(r5, r4, Operand(r6, LSL, 1)); |
| 4714 | __ add(r5, r5, Operand(kParameterMapHeaderSize)); |
| 4715 | __ str(r5, FieldMemOperand(r4, FixedArray::kHeaderSize + 1 * kPointerSize)); |
| 4716 | |
| 4717 | // Copy the parameter slots and the holes in the arguments. |
| 4718 | // We need to fill in mapped_parameter_count slots. They index the context, |
| 4719 | // where parameters are stored in reverse order, at |
| 4720 | // MIN_CONTEXT_SLOTS .. MIN_CONTEXT_SLOTS+parameter_count-1 |
| 4721 | // The mapped parameter thus need to get indices |
| 4722 | // MIN_CONTEXT_SLOTS+parameter_count-1 .. |
| 4723 | // MIN_CONTEXT_SLOTS+parameter_count-mapped_parameter_count |
| 4724 | // We loop from right to left. |
| 4725 | Label parameters_loop, parameters_test; |
| 4726 | __ mov(r5, r6); |
| 4727 | __ add(r9, r2, Operand(Smi::FromInt(Context::MIN_CONTEXT_SLOTS))); |
| 4728 | __ sub(r9, r9, Operand(r6)); |
| 4729 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 4730 | __ add(r1, r4, Operand(r5, LSL, 1)); |
| 4731 | __ add(r1, r1, Operand(kParameterMapHeaderSize)); |
| 4732 | |
| 4733 | // r1 = address of backing store (tagged) |
| 4734 | // r4 = address of parameter map (tagged), which is also the address of new |
| 4735 | // object + Heap::kSloppyArgumentsObjectSize (tagged) |
| 4736 | // r0 = temporary scratch (a.o., for address calculation) |
| 4737 | // r5 = loop variable (tagged) |
| 4738 | // ip = the hole value |
| 4739 | __ jmp(¶meters_test); |
| 4740 | |
| 4741 | __ bind(¶meters_loop); |
| 4742 | __ sub(r5, r5, Operand(Smi::FromInt(1))); |
| 4743 | __ mov(r0, Operand(r5, LSL, 1)); |
| 4744 | __ add(r0, r0, Operand(kParameterMapHeaderSize - kHeapObjectTag)); |
| 4745 | __ str(r9, MemOperand(r4, r0)); |
| 4746 | __ sub(r0, r0, Operand(kParameterMapHeaderSize - FixedArray::kHeaderSize)); |
| 4747 | __ str(ip, MemOperand(r1, r0)); |
| 4748 | __ add(r9, r9, Operand(Smi::FromInt(1))); |
| 4749 | __ bind(¶meters_test); |
| 4750 | __ cmp(r5, Operand(Smi::FromInt(0))); |
| 4751 | __ b(ne, ¶meters_loop); |
| 4752 | |
| 4753 | // Restore r0 = new object (tagged) and r5 = argument count (tagged). |
| 4754 | __ sub(r0, r4, Operand(JSSloppyArgumentsObject::kSize)); |
| 4755 | __ ldr(r5, FieldMemOperand(r0, JSSloppyArgumentsObject::kLengthOffset)); |
| 4756 | |
| 4757 | __ bind(&skip_parameter_map); |
| 4758 | // r0 = address of new object (tagged) |
| 4759 | // r1 = address of backing store (tagged) |
| 4760 | // r5 = argument count (tagged) |
| 4761 | // r6 = mapped parameter count (tagged) |
| 4762 | // r9 = scratch |
| 4763 | // Copy arguments header and remaining slots (if there are any). |
| 4764 | __ LoadRoot(r9, Heap::kFixedArrayMapRootIndex); |
| 4765 | __ str(r9, FieldMemOperand(r1, FixedArray::kMapOffset)); |
| 4766 | __ str(r5, FieldMemOperand(r1, FixedArray::kLengthOffset)); |
| 4767 | |
| 4768 | Label arguments_loop, arguments_test; |
| 4769 | __ sub(r3, r3, Operand(r6, LSL, 1)); |
| 4770 | __ jmp(&arguments_test); |
| 4771 | |
| 4772 | __ bind(&arguments_loop); |
| 4773 | __ sub(r3, r3, Operand(kPointerSize)); |
| 4774 | __ ldr(r4, MemOperand(r3, 0)); |
| 4775 | __ add(r9, r1, Operand(r6, LSL, 1)); |
| 4776 | __ str(r4, FieldMemOperand(r9, FixedArray::kHeaderSize)); |
| 4777 | __ add(r6, r6, Operand(Smi::FromInt(1))); |
| 4778 | |
| 4779 | __ bind(&arguments_test); |
| 4780 | __ cmp(r6, Operand(r5)); |
| 4781 | __ b(lt, &arguments_loop); |
| 4782 | |
| 4783 | // Return. |
| 4784 | __ Ret(); |
| 4785 | |
| 4786 | // Do the runtime call to allocate the arguments object. |
| 4787 | // r0 = address of new object (tagged) |
| 4788 | // r5 = argument count (tagged) |
| 4789 | __ bind(&runtime); |
| 4790 | __ Push(r1, r3, r5); |
| 4791 | __ TailCallRuntime(Runtime::kNewSloppyArguments); |
| 4792 | } |
| 4793 | |
| 4794 | |
| 4795 | void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) { |
| 4796 | // ----------- S t a t e ------------- |
| 4797 | // -- r1 : function |
| 4798 | // -- cp : context |
| 4799 | // -- fp : frame pointer |
| 4800 | // -- lr : return address |
| 4801 | // ----------------------------------- |
| 4802 | __ AssertFunction(r1); |
| 4803 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4804 | // Make r2 point to the JavaScript frame. |
| 4805 | __ mov(r2, fp); |
| 4806 | if (skip_stub_frame()) { |
| 4807 | // For Ignition we need to skip the handler/stub frame to reach the |
| 4808 | // JavaScript frame for the function. |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4809 | __ ldr(r2, MemOperand(r2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4810 | } |
| 4811 | if (FLAG_debug_code) { |
| 4812 | Label ok; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4813 | __ ldr(ip, MemOperand(r2, StandardFrameConstants::kFunctionOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4814 | __ cmp(ip, r1); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 4815 | __ b(eq, &ok); |
| 4816 | __ Abort(kInvalidFrameForFastNewRestArgumentsStub); |
| 4817 | __ bind(&ok); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4818 | } |
| 4819 | |
| 4820 | // Check if we have an arguments adaptor frame below the function frame. |
| 4821 | Label arguments_adaptor, arguments_done; |
| 4822 | __ ldr(r3, MemOperand(r2, StandardFrameConstants::kCallerFPOffset)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 4823 | __ ldr(ip, MemOperand(r3, CommonFrameConstants::kContextOrFrameTypeOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4824 | __ cmp(ip, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 4825 | __ b(eq, &arguments_adaptor); |
| 4826 | { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4827 | __ ldr(r4, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4828 | __ ldr(r0, FieldMemOperand( |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4829 | r4, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4830 | __ add(r2, r2, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4831 | __ add(r2, r2, |
| 4832 | Operand(StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize)); |
| 4833 | } |
| 4834 | __ b(&arguments_done); |
| 4835 | __ bind(&arguments_adaptor); |
| 4836 | { |
| 4837 | __ ldr(r0, MemOperand(r3, ArgumentsAdaptorFrameConstants::kLengthOffset)); |
| 4838 | __ add(r2, r3, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4839 | __ add(r2, r2, |
| 4840 | Operand(StandardFrameConstants::kCallerSPOffset - 1 * kPointerSize)); |
| 4841 | } |
| 4842 | __ bind(&arguments_done); |
| 4843 | |
| 4844 | // ----------- S t a t e ------------- |
| 4845 | // -- cp : context |
| 4846 | // -- r0 : number of rest parameters (tagged) |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4847 | // -- r1 : function |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4848 | // -- r2 : pointer to first rest parameters |
| 4849 | // -- lr : return address |
| 4850 | // ----------------------------------- |
| 4851 | |
| 4852 | // Allocate space for the strict arguments object plus the backing store. |
| 4853 | Label allocate, done_allocate; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4854 | __ mov(r6, Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize)); |
| 4855 | __ add(r6, r6, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4856 | __ Allocate(r6, r3, r4, r5, &allocate, NO_ALLOCATION_FLAGS); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4857 | __ bind(&done_allocate); |
| 4858 | |
| 4859 | // Setup the elements array in r3. |
| 4860 | __ LoadRoot(r1, Heap::kFixedArrayMapRootIndex); |
| 4861 | __ str(r1, FieldMemOperand(r3, FixedArray::kMapOffset)); |
| 4862 | __ str(r0, FieldMemOperand(r3, FixedArray::kLengthOffset)); |
| 4863 | __ add(r4, r3, Operand(FixedArray::kHeaderSize)); |
| 4864 | { |
| 4865 | Label loop, done_loop; |
| 4866 | __ add(r1, r4, Operand(r0, LSL, kPointerSizeLog2 - 1)); |
| 4867 | __ bind(&loop); |
| 4868 | __ cmp(r4, r1); |
| 4869 | __ b(eq, &done_loop); |
| 4870 | __ ldr(ip, MemOperand(r2, 1 * kPointerSize, NegPostIndex)); |
| 4871 | __ str(ip, FieldMemOperand(r4, 0 * kPointerSize)); |
| 4872 | __ add(r4, r4, Operand(1 * kPointerSize)); |
| 4873 | __ b(&loop); |
| 4874 | __ bind(&done_loop); |
| 4875 | } |
| 4876 | |
| 4877 | // Setup the strict arguments object in r4. |
| 4878 | __ LoadNativeContextSlot(Context::STRICT_ARGUMENTS_MAP_INDEX, r1); |
| 4879 | __ str(r1, FieldMemOperand(r4, JSStrictArgumentsObject::kMapOffset)); |
| 4880 | __ LoadRoot(r1, Heap::kEmptyFixedArrayRootIndex); |
| 4881 | __ str(r1, FieldMemOperand(r4, JSStrictArgumentsObject::kPropertiesOffset)); |
| 4882 | __ str(r3, FieldMemOperand(r4, JSStrictArgumentsObject::kElementsOffset)); |
| 4883 | __ str(r0, FieldMemOperand(r4, JSStrictArgumentsObject::kLengthOffset)); |
| 4884 | STATIC_ASSERT(JSStrictArgumentsObject::kSize == 4 * kPointerSize); |
| 4885 | __ mov(r0, r4); |
| 4886 | __ Ret(); |
| 4887 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4888 | // Fall back to %AllocateInNewSpace (if not too big). |
| 4889 | Label too_big_for_new_space; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4890 | __ bind(&allocate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4891 | __ cmp(r6, Operand(Page::kMaxRegularHeapObjectSize)); |
| 4892 | __ b(gt, &too_big_for_new_space); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4893 | { |
| 4894 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4895 | __ SmiTag(r6); |
| 4896 | __ Push(r0, r2, r6); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4897 | __ CallRuntime(Runtime::kAllocateInNewSpace); |
| 4898 | __ mov(r3, r0); |
| 4899 | __ Pop(r0, r2); |
| 4900 | } |
| 4901 | __ b(&done_allocate); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 4902 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 4903 | // Fall back to %NewStrictArguments. |
| 4904 | __ bind(&too_big_for_new_space); |
| 4905 | __ push(r1); |
| 4906 | __ TailCallRuntime(Runtime::kNewStrictArguments); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 4907 | } |
| 4908 | |
| 4909 | |
| 4910 | void StoreGlobalViaContextStub::Generate(MacroAssembler* masm) { |
| 4911 | Register value = r0; |
| 4912 | Register slot = r2; |
| 4913 | |
| 4914 | Register cell = r1; |
| 4915 | Register cell_details = r4; |
| 4916 | Register cell_value = r5; |
| 4917 | Register cell_value_map = r6; |
| 4918 | Register scratch = r9; |
| 4919 | |
| 4920 | Register context = cp; |
| 4921 | Register context_temp = cell; |
| 4922 | |
| 4923 | Label fast_heapobject_case, fast_smi_case, slow_case; |
| 4924 | |
| 4925 | if (FLAG_debug_code) { |
| 4926 | __ CompareRoot(value, Heap::kTheHoleValueRootIndex); |
| 4927 | __ Check(ne, kUnexpectedValue); |
| 4928 | } |
| 4929 | |
| 4930 | // Go up the context chain to the script context. |
| 4931 | for (int i = 0; i < depth(); i++) { |
| 4932 | __ ldr(context_temp, ContextMemOperand(context, Context::PREVIOUS_INDEX)); |
| 4933 | context = context_temp; |
| 4934 | } |
| 4935 | |
| 4936 | // Load the PropertyCell at the specified slot. |
| 4937 | __ add(cell, context, Operand(slot, LSL, kPointerSizeLog2)); |
| 4938 | __ ldr(cell, ContextMemOperand(cell)); |
| 4939 | |
| 4940 | // Load PropertyDetails for the cell (actually only the cell_type and kind). |
| 4941 | __ ldr(cell_details, FieldMemOperand(cell, PropertyCell::kDetailsOffset)); |
| 4942 | __ SmiUntag(cell_details); |
| 4943 | __ and_(cell_details, cell_details, |
| 4944 | Operand(PropertyDetails::PropertyCellTypeField::kMask | |
| 4945 | PropertyDetails::KindField::kMask | |
| 4946 | PropertyDetails::kAttributesReadOnlyMask)); |
| 4947 | |
| 4948 | // Check if PropertyCell holds mutable data. |
| 4949 | Label not_mutable_data; |
| 4950 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 4951 | PropertyCellType::kMutable) | |
| 4952 | PropertyDetails::KindField::encode(kData))); |
| 4953 | __ b(ne, ¬_mutable_data); |
| 4954 | __ JumpIfSmi(value, &fast_smi_case); |
| 4955 | |
| 4956 | __ bind(&fast_heapobject_case); |
| 4957 | __ str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 4958 | // RecordWriteField clobbers the value register, so we copy it before the |
| 4959 | // call. |
| 4960 | __ mov(r4, Operand(value)); |
| 4961 | __ RecordWriteField(cell, PropertyCell::kValueOffset, r4, scratch, |
| 4962 | kLRHasNotBeenSaved, kDontSaveFPRegs, EMIT_REMEMBERED_SET, |
| 4963 | OMIT_SMI_CHECK); |
| 4964 | __ Ret(); |
| 4965 | |
| 4966 | __ bind(¬_mutable_data); |
| 4967 | // Check if PropertyCell value matches the new value (relevant for Constant, |
| 4968 | // ConstantType and Undefined cells). |
| 4969 | Label not_same_value; |
| 4970 | __ ldr(cell_value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 4971 | __ cmp(cell_value, value); |
| 4972 | __ b(ne, ¬_same_value); |
| 4973 | |
| 4974 | // Make sure the PropertyCell is not marked READ_ONLY. |
| 4975 | __ tst(cell_details, Operand(PropertyDetails::kAttributesReadOnlyMask)); |
| 4976 | __ b(ne, &slow_case); |
| 4977 | |
| 4978 | if (FLAG_debug_code) { |
| 4979 | Label done; |
| 4980 | // This can only be true for Constant, ConstantType and Undefined cells, |
| 4981 | // because we never store the_hole via this stub. |
| 4982 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 4983 | PropertyCellType::kConstant) | |
| 4984 | PropertyDetails::KindField::encode(kData))); |
| 4985 | __ b(eq, &done); |
| 4986 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 4987 | PropertyCellType::kConstantType) | |
| 4988 | PropertyDetails::KindField::encode(kData))); |
| 4989 | __ b(eq, &done); |
| 4990 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 4991 | PropertyCellType::kUndefined) | |
| 4992 | PropertyDetails::KindField::encode(kData))); |
| 4993 | __ Check(eq, kUnexpectedValue); |
| 4994 | __ bind(&done); |
| 4995 | } |
| 4996 | __ Ret(); |
| 4997 | __ bind(¬_same_value); |
| 4998 | |
| 4999 | // Check if PropertyCell contains data with constant type (and is not |
| 5000 | // READ_ONLY). |
| 5001 | __ cmp(cell_details, Operand(PropertyDetails::PropertyCellTypeField::encode( |
| 5002 | PropertyCellType::kConstantType) | |
| 5003 | PropertyDetails::KindField::encode(kData))); |
| 5004 | __ b(ne, &slow_case); |
| 5005 | |
| 5006 | // Now either both old and new values must be smis or both must be heap |
| 5007 | // objects with same map. |
| 5008 | Label value_is_heap_object; |
| 5009 | __ JumpIfNotSmi(value, &value_is_heap_object); |
| 5010 | __ JumpIfNotSmi(cell_value, &slow_case); |
| 5011 | // Old and new values are smis, no need for a write barrier here. |
| 5012 | __ bind(&fast_smi_case); |
| 5013 | __ str(value, FieldMemOperand(cell, PropertyCell::kValueOffset)); |
| 5014 | __ Ret(); |
| 5015 | |
| 5016 | __ bind(&value_is_heap_object); |
| 5017 | __ JumpIfSmi(cell_value, &slow_case); |
| 5018 | |
| 5019 | __ ldr(cell_value_map, FieldMemOperand(cell_value, HeapObject::kMapOffset)); |
| 5020 | __ ldr(scratch, FieldMemOperand(value, HeapObject::kMapOffset)); |
| 5021 | __ cmp(cell_value_map, scratch); |
| 5022 | __ b(eq, &fast_heapobject_case); |
| 5023 | |
| 5024 | // Fallback to runtime. |
| 5025 | __ bind(&slow_case); |
| 5026 | __ SmiTag(slot); |
| 5027 | __ Push(slot, value); |
| 5028 | __ TailCallRuntime(is_strict(language_mode()) |
| 5029 | ? Runtime::kStoreGlobalViaContext_Strict |
| 5030 | : Runtime::kStoreGlobalViaContext_Sloppy); |
| 5031 | } |
| 5032 | |
| 5033 | |
| 5034 | static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
| 5035 | return ref0.address() - ref1.address(); |
| 5036 | } |
| 5037 | |
| 5038 | |
| 5039 | // Calls an API function. Allocates HandleScope, extracts returned value |
| 5040 | // from handle and propagates exceptions. Restores context. stack_space |
| 5041 | // - space to be unwound on exit (includes the call JS arguments space and |
| 5042 | // the additional space allocated for the fast call). |
| 5043 | static void CallApiFunctionAndReturn(MacroAssembler* masm, |
| 5044 | Register function_address, |
| 5045 | ExternalReference thunk_ref, |
| 5046 | int stack_space, |
| 5047 | MemOperand* stack_space_operand, |
| 5048 | MemOperand return_value_operand, |
| 5049 | MemOperand* context_restore_operand) { |
| 5050 | Isolate* isolate = masm->isolate(); |
| 5051 | ExternalReference next_address = |
| 5052 | ExternalReference::handle_scope_next_address(isolate); |
| 5053 | const int kNextOffset = 0; |
| 5054 | const int kLimitOffset = AddressOffset( |
| 5055 | ExternalReference::handle_scope_limit_address(isolate), next_address); |
| 5056 | const int kLevelOffset = AddressOffset( |
| 5057 | ExternalReference::handle_scope_level_address(isolate), next_address); |
| 5058 | |
| 5059 | DCHECK(function_address.is(r1) || function_address.is(r2)); |
| 5060 | |
| 5061 | Label profiler_disabled; |
| 5062 | Label end_profiler_check; |
| 5063 | __ mov(r9, Operand(ExternalReference::is_profiling_address(isolate))); |
| 5064 | __ ldrb(r9, MemOperand(r9, 0)); |
| 5065 | __ cmp(r9, Operand(0)); |
| 5066 | __ b(eq, &profiler_disabled); |
| 5067 | |
| 5068 | // Additional parameter is the address of the actual callback. |
| 5069 | __ mov(r3, Operand(thunk_ref)); |
| 5070 | __ jmp(&end_profiler_check); |
| 5071 | |
| 5072 | __ bind(&profiler_disabled); |
| 5073 | __ Move(r3, function_address); |
| 5074 | __ bind(&end_profiler_check); |
| 5075 | |
| 5076 | // Allocate HandleScope in callee-save registers. |
| 5077 | __ mov(r9, Operand(next_address)); |
| 5078 | __ ldr(r4, MemOperand(r9, kNextOffset)); |
| 5079 | __ ldr(r5, MemOperand(r9, kLimitOffset)); |
| 5080 | __ ldr(r6, MemOperand(r9, kLevelOffset)); |
| 5081 | __ add(r6, r6, Operand(1)); |
| 5082 | __ str(r6, MemOperand(r9, kLevelOffset)); |
| 5083 | |
| 5084 | if (FLAG_log_timer_events) { |
| 5085 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5086 | __ PushSafepointRegisters(); |
| 5087 | __ PrepareCallCFunction(1, r0); |
| 5088 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5089 | __ CallCFunction(ExternalReference::log_enter_external_function(isolate), |
| 5090 | 1); |
| 5091 | __ PopSafepointRegisters(); |
| 5092 | } |
| 5093 | |
| 5094 | // Native call returns to the DirectCEntry stub which redirects to the |
| 5095 | // return address pushed on stack (could have moved after GC). |
| 5096 | // DirectCEntry stub itself is generated early and never moves. |
| 5097 | DirectCEntryStub stub(isolate); |
| 5098 | stub.GenerateCall(masm, r3); |
| 5099 | |
| 5100 | if (FLAG_log_timer_events) { |
| 5101 | FrameScope frame(masm, StackFrame::MANUAL); |
| 5102 | __ PushSafepointRegisters(); |
| 5103 | __ PrepareCallCFunction(1, r0); |
| 5104 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5105 | __ CallCFunction(ExternalReference::log_leave_external_function(isolate), |
| 5106 | 1); |
| 5107 | __ PopSafepointRegisters(); |
| 5108 | } |
| 5109 | |
| 5110 | Label promote_scheduled_exception; |
| 5111 | Label delete_allocated_handles; |
| 5112 | Label leave_exit_frame; |
| 5113 | Label return_value_loaded; |
| 5114 | |
| 5115 | // load value from ReturnValue |
| 5116 | __ ldr(r0, return_value_operand); |
| 5117 | __ bind(&return_value_loaded); |
| 5118 | // No more valid handles (the result handle was the last one). Restore |
| 5119 | // previous handle scope. |
| 5120 | __ str(r4, MemOperand(r9, kNextOffset)); |
| 5121 | if (__ emit_debug_code()) { |
| 5122 | __ ldr(r1, MemOperand(r9, kLevelOffset)); |
| 5123 | __ cmp(r1, r6); |
| 5124 | __ Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
| 5125 | } |
| 5126 | __ sub(r6, r6, Operand(1)); |
| 5127 | __ str(r6, MemOperand(r9, kLevelOffset)); |
| 5128 | __ ldr(ip, MemOperand(r9, kLimitOffset)); |
| 5129 | __ cmp(r5, ip); |
| 5130 | __ b(ne, &delete_allocated_handles); |
| 5131 | |
| 5132 | // Leave the API exit frame. |
| 5133 | __ bind(&leave_exit_frame); |
| 5134 | bool restore_context = context_restore_operand != NULL; |
| 5135 | if (restore_context) { |
| 5136 | __ ldr(cp, *context_restore_operand); |
| 5137 | } |
| 5138 | // LeaveExitFrame expects unwind space to be in a register. |
| 5139 | if (stack_space_operand != NULL) { |
| 5140 | __ ldr(r4, *stack_space_operand); |
| 5141 | } else { |
| 5142 | __ mov(r4, Operand(stack_space)); |
| 5143 | } |
| 5144 | __ LeaveExitFrame(false, r4, !restore_context, stack_space_operand != NULL); |
| 5145 | |
| 5146 | // Check if the function scheduled an exception. |
| 5147 | __ LoadRoot(r4, Heap::kTheHoleValueRootIndex); |
| 5148 | __ mov(ip, Operand(ExternalReference::scheduled_exception_address(isolate))); |
| 5149 | __ ldr(r5, MemOperand(ip)); |
| 5150 | __ cmp(r4, r5); |
| 5151 | __ b(ne, &promote_scheduled_exception); |
| 5152 | |
| 5153 | __ mov(pc, lr); |
| 5154 | |
| 5155 | // Re-throw by promoting a scheduled exception. |
| 5156 | __ bind(&promote_scheduled_exception); |
| 5157 | __ TailCallRuntime(Runtime::kPromoteScheduledException); |
| 5158 | |
| 5159 | // HandleScope limit has changed. Delete allocated extensions. |
| 5160 | __ bind(&delete_allocated_handles); |
| 5161 | __ str(r5, MemOperand(r9, kLimitOffset)); |
| 5162 | __ mov(r4, r0); |
| 5163 | __ PrepareCallCFunction(1, r5); |
| 5164 | __ mov(r0, Operand(ExternalReference::isolate_address(isolate))); |
| 5165 | __ CallCFunction(ExternalReference::delete_handle_scope_extensions(isolate), |
| 5166 | 1); |
| 5167 | __ mov(r0, r4); |
| 5168 | __ jmp(&leave_exit_frame); |
| 5169 | } |
| 5170 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5171 | void CallApiCallbackStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5172 | // ----------- S t a t e ------------- |
| 5173 | // -- r0 : callee |
| 5174 | // -- r4 : call_data |
| 5175 | // -- r2 : holder |
| 5176 | // -- r1 : api_function_address |
| 5177 | // -- cp : context |
| 5178 | // -- |
| 5179 | // -- sp[0] : last argument |
| 5180 | // -- ... |
| 5181 | // -- sp[(argc - 1)* 4] : first argument |
| 5182 | // -- sp[argc * 4] : receiver |
| 5183 | // ----------------------------------- |
| 5184 | |
| 5185 | Register callee = r0; |
| 5186 | Register call_data = r4; |
| 5187 | Register holder = r2; |
| 5188 | Register api_function_address = r1; |
| 5189 | Register context = cp; |
| 5190 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5191 | typedef FunctionCallbackArguments FCA; |
| 5192 | |
| 5193 | STATIC_ASSERT(FCA::kContextSaveIndex == 6); |
| 5194 | STATIC_ASSERT(FCA::kCalleeIndex == 5); |
| 5195 | STATIC_ASSERT(FCA::kDataIndex == 4); |
| 5196 | STATIC_ASSERT(FCA::kReturnValueOffset == 3); |
| 5197 | STATIC_ASSERT(FCA::kReturnValueDefaultValueIndex == 2); |
| 5198 | STATIC_ASSERT(FCA::kIsolateIndex == 1); |
| 5199 | STATIC_ASSERT(FCA::kHolderIndex == 0); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5200 | STATIC_ASSERT(FCA::kNewTargetIndex == 7); |
| 5201 | STATIC_ASSERT(FCA::kArgsLength == 8); |
| 5202 | |
| 5203 | // new target |
| 5204 | __ PushRoot(Heap::kUndefinedValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5205 | |
| 5206 | // context save |
| 5207 | __ push(context); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5208 | if (!is_lazy()) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5209 | // load context from callee |
| 5210 | __ ldr(context, FieldMemOperand(callee, JSFunction::kContextOffset)); |
| 5211 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5212 | |
| 5213 | // callee |
| 5214 | __ push(callee); |
| 5215 | |
| 5216 | // call data |
| 5217 | __ push(call_data); |
| 5218 | |
| 5219 | Register scratch = call_data; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5220 | if (!call_data_undefined()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5221 | __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| 5222 | } |
| 5223 | // return value |
| 5224 | __ push(scratch); |
| 5225 | // return value default |
| 5226 | __ push(scratch); |
| 5227 | // isolate |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5228 | __ mov(scratch, Operand(ExternalReference::isolate_address(masm->isolate()))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5229 | __ push(scratch); |
| 5230 | // holder |
| 5231 | __ push(holder); |
| 5232 | |
| 5233 | // Prepare arguments. |
| 5234 | __ mov(scratch, sp); |
| 5235 | |
| 5236 | // Allocate the v8::Arguments structure in the arguments' space since |
| 5237 | // it's not controlled by GC. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5238 | const int kApiStackSpace = 3; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5239 | |
| 5240 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5241 | __ EnterExitFrame(false, kApiStackSpace); |
| 5242 | |
| 5243 | DCHECK(!api_function_address.is(r0) && !scratch.is(r0)); |
| 5244 | // r0 = FunctionCallbackInfo& |
| 5245 | // Arguments is after the return address. |
| 5246 | __ add(r0, sp, Operand(1 * kPointerSize)); |
| 5247 | // FunctionCallbackInfo::implicit_args_ |
| 5248 | __ str(scratch, MemOperand(r0, 0 * kPointerSize)); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5249 | // FunctionCallbackInfo::values_ |
| 5250 | __ add(ip, scratch, Operand((FCA::kArgsLength - 1 + argc()) * kPointerSize)); |
| 5251 | __ str(ip, MemOperand(r0, 1 * kPointerSize)); |
| 5252 | // FunctionCallbackInfo::length_ = argc |
| 5253 | __ mov(ip, Operand(argc())); |
| 5254 | __ str(ip, MemOperand(r0, 2 * kPointerSize)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5255 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5256 | ExternalReference thunk_ref = |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5257 | ExternalReference::invoke_function_callback(masm->isolate()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5258 | |
| 5259 | AllowExternalCallThatCantCauseGC scope(masm); |
| 5260 | MemOperand context_restore_operand( |
| 5261 | fp, (2 + FCA::kContextSaveIndex) * kPointerSize); |
| 5262 | // Stores return the first js argument |
| 5263 | int return_value_offset = 0; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5264 | if (is_store()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5265 | return_value_offset = 2 + FCA::kArgsLength; |
| 5266 | } else { |
| 5267 | return_value_offset = 2 + FCA::kReturnValueOffset; |
| 5268 | } |
| 5269 | MemOperand return_value_operand(fp, return_value_offset * kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5270 | int stack_space = 0; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5271 | MemOperand length_operand = MemOperand(sp, 3 * kPointerSize); |
| 5272 | MemOperand* stack_space_operand = &length_operand; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 5273 | stack_space = argc() + FCA::kArgsLength + 1; |
| 5274 | stack_space_operand = NULL; |
| 5275 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5276 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, stack_space, |
| 5277 | stack_space_operand, return_value_operand, |
| 5278 | &context_restore_operand); |
| 5279 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5280 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5281 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5282 | void CallApiGetterStub::Generate(MacroAssembler* masm) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5283 | // Build v8::PropertyCallbackInfo::args_ array on the stack and push property |
| 5284 | // name below the exit frame to make GC aware of them. |
| 5285 | STATIC_ASSERT(PropertyCallbackArguments::kShouldThrowOnErrorIndex == 0); |
| 5286 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 1); |
| 5287 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 2); |
| 5288 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 3); |
| 5289 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 4); |
| 5290 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 5); |
| 5291 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 6); |
| 5292 | STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 7); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5293 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5294 | Register receiver = ApiGetterDescriptor::ReceiverRegister(); |
| 5295 | Register holder = ApiGetterDescriptor::HolderRegister(); |
| 5296 | Register callback = ApiGetterDescriptor::CallbackRegister(); |
| 5297 | Register scratch = r4; |
| 5298 | DCHECK(!AreAliased(receiver, holder, callback, scratch)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5299 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5300 | Register api_function_address = r2; |
| 5301 | |
| 5302 | __ push(receiver); |
| 5303 | // Push data from AccessorInfo. |
| 5304 | __ ldr(scratch, FieldMemOperand(callback, AccessorInfo::kDataOffset)); |
| 5305 | __ push(scratch); |
| 5306 | __ LoadRoot(scratch, Heap::kUndefinedValueRootIndex); |
| 5307 | __ Push(scratch, scratch); |
| 5308 | __ mov(scratch, Operand(ExternalReference::isolate_address(isolate()))); |
| 5309 | __ Push(scratch, holder); |
| 5310 | __ Push(Smi::FromInt(0)); // should_throw_on_error -> false |
| 5311 | __ ldr(scratch, FieldMemOperand(callback, AccessorInfo::kNameOffset)); |
| 5312 | __ push(scratch); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5313 | // v8::PropertyCallbackInfo::args_ array and name handle. |
| 5314 | const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1; |
| 5315 | |
| 5316 | // Load address of v8::PropertyAccessorInfo::args_ array and name handle. |
| 5317 | __ mov(r0, sp); // r0 = Handle<Name> |
| 5318 | __ add(r1, r0, Operand(1 * kPointerSize)); // r1 = v8::PCI::args_ |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5319 | |
| 5320 | const int kApiStackSpace = 1; |
| 5321 | FrameScope frame_scope(masm, StackFrame::MANUAL); |
| 5322 | __ EnterExitFrame(false, kApiStackSpace); |
| 5323 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5324 | // Create v8::PropertyCallbackInfo object on the stack and initialize |
| 5325 | // it's args_ field. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5326 | __ str(r1, MemOperand(sp, 1 * kPointerSize)); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5327 | __ add(r1, sp, Operand(1 * kPointerSize)); // r1 = v8::PropertyCallbackInfo& |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5328 | |
| 5329 | ExternalReference thunk_ref = |
| 5330 | ExternalReference::invoke_accessor_getter_callback(isolate()); |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5331 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 5332 | __ ldr(scratch, FieldMemOperand(callback, AccessorInfo::kJsGetterOffset)); |
| 5333 | __ ldr(api_function_address, |
| 5334 | FieldMemOperand(scratch, Foreign::kForeignAddressOffset)); |
| 5335 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5336 | // +3 is to skip prolog, return address and name handle. |
| 5337 | MemOperand return_value_operand( |
| 5338 | fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5339 | CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 5340 | kStackUnwindSpace, NULL, return_value_operand, NULL); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5341 | } |
| 5342 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5343 | #undef __ |
| 5344 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5345 | } // namespace internal |
| 5346 | } // namespace v8 |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 5347 | |
| 5348 | #endif // V8_TARGET_ARCH_ARM |