Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 30 | #if defined(V8_TARGET_ARCH_ARM) |
| 31 | |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 32 | #include "codegen.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 33 | #include "debug.h" |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 34 | #include "deoptimizer.h" |
| 35 | #include "full-codegen.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 36 | #include "runtime.h" |
| 37 | |
| 38 | namespace v8 { |
| 39 | namespace internal { |
| 40 | |
| 41 | |
| 42 | #define __ ACCESS_MASM(masm) |
| 43 | |
| 44 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 45 | void Builtins::Generate_Adaptor(MacroAssembler* masm, |
| 46 | CFunctionId id, |
| 47 | BuiltinExtraArguments extra_args) { |
| 48 | // ----------- S t a t e ------------- |
| 49 | // -- r0 : number of arguments excluding receiver |
| 50 | // -- r1 : called function (only guaranteed when |
| 51 | // extra_args requires it) |
| 52 | // -- cp : context |
| 53 | // -- sp[0] : last argument |
| 54 | // -- ... |
| 55 | // -- sp[4 * (argc - 1)] : first argument (argc == r0) |
| 56 | // -- sp[4 * argc] : receiver |
| 57 | // ----------------------------------- |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 58 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 59 | // Insert extra arguments. |
| 60 | int num_extra_args = 0; |
| 61 | if (extra_args == NEEDS_CALLED_FUNCTION) { |
| 62 | num_extra_args = 1; |
| 63 | __ push(r1); |
| 64 | } else { |
| 65 | ASSERT(extra_args == NO_EXTRA_ARGUMENTS); |
| 66 | } |
| 67 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 68 | // JumpToExternalReference expects r0 to contain the number of arguments |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 69 | // including the receiver and the extra arguments. |
| 70 | __ add(r0, r0, Operand(num_extra_args + 1)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 71 | __ JumpToExternalReference(ExternalReference(id, masm->isolate())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | } |
| 73 | |
| 74 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 75 | // Load the built-in InternalArray function from the current context. |
| 76 | static void GenerateLoadInternalArrayFunction(MacroAssembler* masm, |
| 77 | Register result) { |
| 78 | // Load the global context. |
| 79 | |
| 80 | __ ldr(result, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 81 | __ ldr(result, |
| 82 | FieldMemOperand(result, GlobalObject::kGlobalContextOffset)); |
| 83 | // Load the InternalArray function from the global context. |
| 84 | __ ldr(result, |
| 85 | MemOperand(result, |
| 86 | Context::SlotOffset( |
| 87 | Context::INTERNAL_ARRAY_FUNCTION_INDEX))); |
| 88 | } |
| 89 | |
| 90 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 91 | // Load the built-in Array function from the current context. |
| 92 | static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| 93 | // Load the global context. |
| 94 | |
| 95 | __ ldr(result, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 96 | __ ldr(result, |
| 97 | FieldMemOperand(result, GlobalObject::kGlobalContextOffset)); |
| 98 | // Load the Array function from the global context. |
| 99 | __ ldr(result, |
| 100 | MemOperand(result, |
| 101 | Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX))); |
| 102 | } |
| 103 | |
| 104 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 105 | // Allocate an empty JSArray. The allocated array is put into the result |
| 106 | // register. An elements backing store is allocated with size initial_capacity |
| 107 | // and filled with the hole values. |
| 108 | static void AllocateEmptyJSArray(MacroAssembler* masm, |
| 109 | Register array_function, |
| 110 | Register result, |
| 111 | Register scratch1, |
| 112 | Register scratch2, |
| 113 | Register scratch3, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 114 | Label* gc_required) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 115 | const int initial_capacity = JSArray::kPreallocatedArrayElements; |
| 116 | STATIC_ASSERT(initial_capacity >= 0); |
| 117 | __ LoadInitialArrayMap(array_function, scratch2, scratch1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 118 | |
| 119 | // Allocate the JSArray object together with space for a fixed array with the |
| 120 | // requested elements. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 121 | int size = JSArray::kSize; |
| 122 | if (initial_capacity > 0) { |
| 123 | size += FixedArray::SizeFor(initial_capacity); |
| 124 | } |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 125 | __ AllocateInNewSpace(size, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 126 | result, |
| 127 | scratch2, |
| 128 | scratch3, |
| 129 | gc_required, |
| 130 | TAG_OBJECT); |
| 131 | |
| 132 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 133 | // array. |
| 134 | // result: JSObject |
| 135 | // scratch1: initial map |
| 136 | // scratch2: start of next object |
| 137 | __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset)); |
| 138 | __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); |
| 139 | __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset)); |
| 140 | // Field JSArray::kElementsOffset is initialized later. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 141 | __ mov(scratch3, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 142 | __ str(scratch3, FieldMemOperand(result, JSArray::kLengthOffset)); |
| 143 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 144 | if (initial_capacity == 0) { |
| 145 | __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); |
| 146 | return; |
| 147 | } |
| 148 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 149 | // Calculate the location of the elements array and set elements array member |
| 150 | // of the JSArray. |
| 151 | // result: JSObject |
| 152 | // scratch2: start of next object |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 153 | __ add(scratch1, result, Operand(JSArray::kSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 154 | __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); |
| 155 | |
| 156 | // Clear the heap tag on the elements array. |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 157 | __ sub(scratch1, scratch1, Operand(kHeapObjectTag)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 158 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 159 | // Initialize the FixedArray and fill it with holes. FixedArray length is |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 160 | // stored as a smi. |
| 161 | // result: JSObject |
| 162 | // scratch1: elements array (untagged) |
| 163 | // scratch2: start of next object |
| 164 | __ LoadRoot(scratch3, Heap::kFixedArrayMapRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 165 | STATIC_ASSERT(0 * kPointerSize == FixedArray::kMapOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 166 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 167 | __ mov(scratch3, Operand(Smi::FromInt(initial_capacity))); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 168 | STATIC_ASSERT(1 * kPointerSize == FixedArray::kLengthOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 169 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
| 170 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 171 | // Fill the FixedArray with the hole value. Inline the code if short. |
| 172 | STATIC_ASSERT(2 * kPointerSize == FixedArray::kHeaderSize); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 173 | __ LoadRoot(scratch3, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 174 | static const int kLoopUnfoldLimit = 4; |
| 175 | if (initial_capacity <= kLoopUnfoldLimit) { |
| 176 | for (int i = 0; i < initial_capacity; i++) { |
| 177 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
| 178 | } |
| 179 | } else { |
| 180 | Label loop, entry; |
| 181 | __ add(scratch2, scratch1, Operand(initial_capacity * kPointerSize)); |
| 182 | __ b(&entry); |
| 183 | __ bind(&loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 184 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 185 | __ bind(&entry); |
| 186 | __ cmp(scratch1, scratch2); |
| 187 | __ b(lt, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 188 | } |
| 189 | } |
| 190 | |
| 191 | // Allocate a JSArray with the number of elements stored in a register. The |
| 192 | // register array_function holds the built-in Array function and the register |
| 193 | // array_size holds the size of the array as a smi. The allocated array is put |
| 194 | // into the result register and beginning and end of the FixedArray elements |
| 195 | // storage is put into registers elements_array_storage and elements_array_end |
| 196 | // (see below for when that is not the case). If the parameter fill_with_holes |
| 197 | // is true the allocated elements backing store is filled with the hole values |
| 198 | // otherwise it is left uninitialized. When the backing store is filled the |
| 199 | // register elements_array_storage is scratched. |
| 200 | static void AllocateJSArray(MacroAssembler* masm, |
| 201 | Register array_function, // Array function. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 202 | Register array_size, // As a smi, cannot be 0. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 203 | Register result, |
| 204 | Register elements_array_storage, |
| 205 | Register elements_array_end, |
| 206 | Register scratch1, |
| 207 | Register scratch2, |
| 208 | bool fill_with_hole, |
| 209 | Label* gc_required) { |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 210 | // Load the initial map from the array function. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 211 | __ LoadInitialArrayMap(array_function, scratch2, elements_array_storage); |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 212 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 213 | if (FLAG_debug_code) { // Assert that array size is not zero. |
| 214 | __ tst(array_size, array_size); |
| 215 | __ Assert(ne, "array size is unexpectedly 0"); |
| 216 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 217 | |
| 218 | // Allocate the JSArray object together with space for a FixedArray with the |
| 219 | // requested number of elements. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 220 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 221 | __ mov(elements_array_end, |
| 222 | Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); |
| 223 | __ add(elements_array_end, |
| 224 | elements_array_end, |
| 225 | Operand(array_size, ASR, kSmiTagSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 226 | __ AllocateInNewSpace( |
| 227 | elements_array_end, |
| 228 | result, |
| 229 | scratch1, |
| 230 | scratch2, |
| 231 | gc_required, |
| 232 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 233 | |
| 234 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 235 | // array. |
| 236 | // result: JSObject |
| 237 | // elements_array_storage: initial map |
| 238 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 239 | __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); |
| 240 | __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); |
| 241 | __ str(elements_array_storage, |
| 242 | FieldMemOperand(result, JSArray::kPropertiesOffset)); |
| 243 | // Field JSArray::kElementsOffset is initialized later. |
| 244 | __ str(array_size, FieldMemOperand(result, JSArray::kLengthOffset)); |
| 245 | |
| 246 | // Calculate the location of the elements array and set elements array member |
| 247 | // of the JSArray. |
| 248 | // result: JSObject |
| 249 | // array_size: size of array (smi) |
| 250 | __ add(elements_array_storage, result, Operand(JSArray::kSize)); |
| 251 | __ str(elements_array_storage, |
| 252 | FieldMemOperand(result, JSArray::kElementsOffset)); |
| 253 | |
| 254 | // Clear the heap tag on the elements array. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 255 | STATIC_ASSERT(kSmiTag == 0); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 256 | __ sub(elements_array_storage, |
| 257 | elements_array_storage, |
| 258 | Operand(kHeapObjectTag)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 259 | // Initialize the fixed array and fill it with holes. FixedArray length is |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 260 | // stored as a smi. |
| 261 | // result: JSObject |
| 262 | // elements_array_storage: elements array (untagged) |
| 263 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 264 | __ LoadRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 265 | ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); |
| 266 | __ str(scratch1, MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 267 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 268 | ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset); |
| 269 | __ str(array_size, |
| 270 | MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
| 271 | |
| 272 | // Calculate elements array and elements array end. |
| 273 | // result: JSObject |
| 274 | // elements_array_storage: elements array element storage |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 275 | // array_size: smi-tagged size of elements array |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 276 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 277 | __ add(elements_array_end, |
| 278 | elements_array_storage, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 279 | Operand(array_size, LSL, kPointerSizeLog2 - kSmiTagSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 280 | |
| 281 | // Fill the allocated FixedArray with the hole value if requested. |
| 282 | // result: JSObject |
| 283 | // elements_array_storage: elements array element storage |
| 284 | // elements_array_end: start of next object |
| 285 | if (fill_with_hole) { |
| 286 | Label loop, entry; |
| 287 | __ LoadRoot(scratch1, Heap::kTheHoleValueRootIndex); |
| 288 | __ jmp(&entry); |
| 289 | __ bind(&loop); |
| 290 | __ str(scratch1, |
| 291 | MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
| 292 | __ bind(&entry); |
| 293 | __ cmp(elements_array_storage, elements_array_end); |
| 294 | __ b(lt, &loop); |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | // Create a new array for the built-in Array function. This function allocates |
| 299 | // the JSArray object and the FixedArray elements array and initializes these. |
| 300 | // If the Array cannot be constructed in native code the runtime is called. This |
| 301 | // function assumes the following state: |
| 302 | // r0: argc |
| 303 | // r1: constructor (built-in Array function) |
| 304 | // lr: return address |
| 305 | // sp[0]: last argument |
| 306 | // This function is used for both construct and normal calls of Array. The only |
| 307 | // difference between handling a construct call and a normal call is that for a |
| 308 | // construct call the constructor function in r1 needs to be preserved for |
| 309 | // entering the generic code. In both cases argc in r0 needs to be preserved. |
| 310 | // Both registers are preserved by this code so no need to differentiate between |
| 311 | // construct call and normal call. |
| 312 | static void ArrayNativeCode(MacroAssembler* masm, |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 313 | Label* call_generic_code) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 314 | Counters* counters = masm->isolate()->counters(); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 315 | Label argc_one_or_more, argc_two_or_more, not_empty_array, empty_array, |
| 316 | has_non_smi_element, finish, cant_transition_map, not_double; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 317 | |
| 318 | // Check for array construction with zero arguments or one. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 319 | __ cmp(r0, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 320 | __ b(ne, &argc_one_or_more); |
| 321 | |
| 322 | // Handle construction of an empty array. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 323 | __ bind(&empty_array); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 324 | AllocateEmptyJSArray(masm, |
| 325 | r1, |
| 326 | r2, |
| 327 | r3, |
| 328 | r4, |
| 329 | r5, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 330 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 331 | __ IncrementCounter(counters->array_function_native(), 1, r3, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 332 | // Set up return value, remove receiver from stack and return. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 333 | __ mov(r0, r2); |
| 334 | __ add(sp, sp, Operand(kPointerSize)); |
| 335 | __ Jump(lr); |
| 336 | |
| 337 | // Check for one argument. Bail out if argument is not smi or if it is |
| 338 | // negative. |
| 339 | __ bind(&argc_one_or_more); |
| 340 | __ cmp(r0, Operand(1)); |
| 341 | __ b(ne, &argc_two_or_more); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 342 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 343 | __ ldr(r2, MemOperand(sp)); // Get the argument from the stack. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 344 | __ tst(r2, r2); |
| 345 | __ b(ne, ¬_empty_array); |
| 346 | __ Drop(1); // Adjust stack. |
| 347 | __ mov(r0, Operand(0)); // Treat this as a call with argc of zero. |
| 348 | __ b(&empty_array); |
| 349 | |
| 350 | __ bind(¬_empty_array); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 351 | __ and_(r3, r2, Operand(kIntptrSignBit | kSmiTagMask), SetCC); |
| 352 | __ b(ne, call_generic_code); |
| 353 | |
| 354 | // Handle construction of an empty array of a certain size. Bail out if size |
| 355 | // is too large to actually allocate an elements array. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 356 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 357 | __ cmp(r2, Operand(JSObject::kInitialMaxFastElementArray << kSmiTagSize)); |
| 358 | __ b(ge, call_generic_code); |
| 359 | |
| 360 | // r0: argc |
| 361 | // r1: constructor |
| 362 | // r2: array_size (smi) |
| 363 | // sp[0]: argument |
| 364 | AllocateJSArray(masm, |
| 365 | r1, |
| 366 | r2, |
| 367 | r3, |
| 368 | r4, |
| 369 | r5, |
| 370 | r6, |
| 371 | r7, |
| 372 | true, |
| 373 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 374 | __ IncrementCounter(counters->array_function_native(), 1, r2, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 375 | // Set up return value, remove receiver and argument from stack and return. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 376 | __ mov(r0, r3); |
| 377 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 378 | __ Jump(lr); |
| 379 | |
| 380 | // Handle construction of an array from a list of arguments. |
| 381 | __ bind(&argc_two_or_more); |
| 382 | __ mov(r2, Operand(r0, LSL, kSmiTagSize)); // Convet argc to a smi. |
| 383 | |
| 384 | // r0: argc |
| 385 | // r1: constructor |
| 386 | // r2: array_size (smi) |
| 387 | // sp[0]: last argument |
| 388 | AllocateJSArray(masm, |
| 389 | r1, |
| 390 | r2, |
| 391 | r3, |
| 392 | r4, |
| 393 | r5, |
| 394 | r6, |
| 395 | r7, |
| 396 | false, |
| 397 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 398 | __ IncrementCounter(counters->array_function_native(), 1, r2, r6); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 399 | |
| 400 | // Fill arguments as array elements. Copy from the top of the stack (last |
| 401 | // element) to the array backing store filling it backwards. Note: |
| 402 | // elements_array_end points after the backing store therefore PreIndex is |
| 403 | // used when filling the backing store. |
| 404 | // r0: argc |
| 405 | // r3: JSArray |
| 406 | // r4: elements_array storage start (untagged) |
| 407 | // r5: elements_array_end (untagged) |
| 408 | // sp[0]: last argument |
| 409 | Label loop, entry; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 410 | __ mov(r7, sp); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 411 | __ jmp(&entry); |
| 412 | __ bind(&loop); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 413 | __ ldr(r2, MemOperand(r7, kPointerSize, PostIndex)); |
| 414 | if (FLAG_smi_only_arrays) { |
| 415 | __ JumpIfNotSmi(r2, &has_non_smi_element); |
| 416 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 417 | __ str(r2, MemOperand(r5, -kPointerSize, PreIndex)); |
| 418 | __ bind(&entry); |
| 419 | __ cmp(r4, r5); |
| 420 | __ b(lt, &loop); |
Ben Murdoch | 5d4cdbf | 2012-04-11 10:23:59 +0100 | [diff] [blame] | 421 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 422 | __ bind(&finish); |
| 423 | __ mov(sp, r7); |
| 424 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 425 | // Remove caller arguments and receiver from the stack, setup return value and |
| 426 | // return. |
| 427 | // r0: argc |
| 428 | // r3: JSArray |
| 429 | // sp[0]: receiver |
| 430 | __ add(sp, sp, Operand(kPointerSize)); |
| 431 | __ mov(r0, r3); |
| 432 | __ Jump(lr); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 433 | |
| 434 | __ bind(&has_non_smi_element); |
| 435 | // Double values are handled by the runtime. |
| 436 | __ CheckMap( |
| 437 | r2, r9, Heap::kHeapNumberMapRootIndex, ¬_double, DONT_DO_SMI_CHECK); |
| 438 | __ bind(&cant_transition_map); |
| 439 | __ UndoAllocationInNewSpace(r3, r4); |
| 440 | __ b(call_generic_code); |
| 441 | |
| 442 | __ bind(¬_double); |
| 443 | // Transition FAST_SMI_ONLY_ELEMENTS to FAST_ELEMENTS. |
| 444 | // r3: JSArray |
| 445 | __ ldr(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 446 | __ LoadTransitionedArrayMapConditional(FAST_SMI_ONLY_ELEMENTS, |
| 447 | FAST_ELEMENTS, |
| 448 | r2, |
| 449 | r9, |
| 450 | &cant_transition_map); |
| 451 | __ str(r2, FieldMemOperand(r3, HeapObject::kMapOffset)); |
| 452 | __ RecordWriteField(r3, |
| 453 | HeapObject::kMapOffset, |
| 454 | r2, |
| 455 | r9, |
| 456 | kLRHasNotBeenSaved, |
| 457 | kDontSaveFPRegs, |
| 458 | EMIT_REMEMBERED_SET, |
| 459 | OMIT_SMI_CHECK); |
| 460 | Label loop2; |
| 461 | __ sub(r7, r7, Operand(kPointerSize)); |
| 462 | __ bind(&loop2); |
| 463 | __ ldr(r2, MemOperand(r7, kPointerSize, PostIndex)); |
| 464 | __ str(r2, MemOperand(r5, -kPointerSize, PreIndex)); |
| 465 | __ cmp(r4, r5); |
| 466 | __ b(lt, &loop2); |
| 467 | __ b(&finish); |
| 468 | } |
| 469 | |
| 470 | |
| 471 | void Builtins::Generate_InternalArrayCode(MacroAssembler* masm) { |
| 472 | // ----------- S t a t e ------------- |
| 473 | // -- r0 : number of arguments |
| 474 | // -- lr : return address |
| 475 | // -- sp[...]: constructor arguments |
| 476 | // ----------------------------------- |
| 477 | Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| 478 | |
| 479 | // Get the InternalArray function. |
| 480 | GenerateLoadInternalArrayFunction(masm, r1); |
| 481 | |
| 482 | if (FLAG_debug_code) { |
| 483 | // Initial map for the builtin InternalArray functions should be maps. |
| 484 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 485 | __ tst(r2, Operand(kSmiTagMask)); |
| 486 | __ Assert(ne, "Unexpected initial map for InternalArray function"); |
| 487 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 488 | __ Assert(eq, "Unexpected initial map for InternalArray function"); |
| 489 | } |
| 490 | |
| 491 | // Run the native code for the InternalArray function called as a normal |
| 492 | // function. |
| 493 | ArrayNativeCode(masm, &generic_array_code); |
| 494 | |
| 495 | // Jump to the generic array code if the specialized code cannot handle the |
| 496 | // construction. |
| 497 | __ bind(&generic_array_code); |
| 498 | |
| 499 | Handle<Code> array_code = |
| 500 | masm->isolate()->builtins()->InternalArrayCodeGeneric(); |
| 501 | __ Jump(array_code, RelocInfo::CODE_TARGET); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | |
| 505 | void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| 506 | // ----------- S t a t e ------------- |
| 507 | // -- r0 : number of arguments |
| 508 | // -- lr : return address |
| 509 | // -- sp[...]: constructor arguments |
| 510 | // ----------------------------------- |
| 511 | Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| 512 | |
| 513 | // Get the Array function. |
| 514 | GenerateLoadArrayFunction(masm, r1); |
| 515 | |
| 516 | if (FLAG_debug_code) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 517 | // Initial map for the builtin Array functions should be maps. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 518 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 519 | __ tst(r2, Operand(kSmiTagMask)); |
| 520 | __ Assert(ne, "Unexpected initial map for Array function"); |
| 521 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 522 | __ Assert(eq, "Unexpected initial map for Array function"); |
| 523 | } |
| 524 | |
| 525 | // Run the native code for the Array function called as a normal function. |
| 526 | ArrayNativeCode(masm, &generic_array_code); |
| 527 | |
| 528 | // Jump to the generic array code if the specialized code cannot handle |
| 529 | // the construction. |
| 530 | __ bind(&generic_array_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 531 | |
| 532 | Handle<Code> array_code = |
| 533 | masm->isolate()->builtins()->ArrayCodeGeneric(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 534 | __ Jump(array_code, RelocInfo::CODE_TARGET); |
| 535 | } |
| 536 | |
| 537 | |
| 538 | void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) { |
| 539 | // ----------- S t a t e ------------- |
| 540 | // -- r0 : number of arguments |
| 541 | // -- r1 : constructor function |
| 542 | // -- lr : return address |
| 543 | // -- sp[...]: constructor arguments |
| 544 | // ----------------------------------- |
| 545 | Label generic_constructor; |
| 546 | |
| 547 | if (FLAG_debug_code) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 548 | // The array construct code is only set for the builtin and internal |
| 549 | // Array functions which always have a map. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 550 | // Initial map for the builtin Array function should be a map. |
| 551 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 552 | __ tst(r2, Operand(kSmiTagMask)); |
| 553 | __ Assert(ne, "Unexpected initial map for Array function"); |
| 554 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 555 | __ Assert(eq, "Unexpected initial map for Array function"); |
| 556 | } |
| 557 | |
| 558 | // Run the native code for the Array function called as a constructor. |
| 559 | ArrayNativeCode(masm, &generic_constructor); |
| 560 | |
| 561 | // Jump to the generic construct code in case the specialized code cannot |
| 562 | // handle the construction. |
| 563 | __ bind(&generic_constructor); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 564 | Handle<Code> generic_construct_stub = |
| 565 | masm->isolate()->builtins()->JSConstructStubGeneric(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 566 | __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); |
| 567 | } |
| 568 | |
| 569 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 570 | void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 571 | // ----------- S t a t e ------------- |
| 572 | // -- r0 : number of arguments |
| 573 | // -- r1 : constructor function |
| 574 | // -- lr : return address |
| 575 | // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| 576 | // -- sp[argc * 4] : receiver |
| 577 | // ----------------------------------- |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 578 | Counters* counters = masm->isolate()->counters(); |
| 579 | __ IncrementCounter(counters->string_ctor_calls(), 1, r2, r3); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 580 | |
| 581 | Register function = r1; |
| 582 | if (FLAG_debug_code) { |
| 583 | __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, r2); |
| 584 | __ cmp(function, Operand(r2)); |
| 585 | __ Assert(eq, "Unexpected String function"); |
| 586 | } |
| 587 | |
| 588 | // Load the first arguments in r0 and get rid of the rest. |
| 589 | Label no_arguments; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 590 | __ cmp(r0, Operand(0, RelocInfo::NONE)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 591 | __ b(eq, &no_arguments); |
| 592 | // First args = sp[(argc - 1) * 4]. |
| 593 | __ sub(r0, r0, Operand(1)); |
| 594 | __ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2, PreIndex)); |
| 595 | // sp now point to args[0], drop args[0] + receiver. |
| 596 | __ Drop(2); |
| 597 | |
| 598 | Register argument = r2; |
| 599 | Label not_cached, argument_is_string; |
| 600 | NumberToStringStub::GenerateLookupNumberStringCache( |
| 601 | masm, |
| 602 | r0, // Input. |
| 603 | argument, // Result. |
| 604 | r3, // Scratch. |
| 605 | r4, // Scratch. |
| 606 | r5, // Scratch. |
| 607 | false, // Is it a Smi? |
| 608 | ¬_cached); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 609 | __ IncrementCounter(counters->string_ctor_cached_number(), 1, r3, r4); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 610 | __ bind(&argument_is_string); |
| 611 | |
| 612 | // ----------- S t a t e ------------- |
| 613 | // -- r2 : argument converted to string |
| 614 | // -- r1 : constructor function |
| 615 | // -- lr : return address |
| 616 | // ----------------------------------- |
| 617 | |
| 618 | Label gc_required; |
| 619 | __ AllocateInNewSpace(JSValue::kSize, |
| 620 | r0, // Result. |
| 621 | r3, // Scratch. |
| 622 | r4, // Scratch. |
| 623 | &gc_required, |
| 624 | TAG_OBJECT); |
| 625 | |
| 626 | // Initialising the String Object. |
| 627 | Register map = r3; |
| 628 | __ LoadGlobalFunctionInitialMap(function, map, r4); |
| 629 | if (FLAG_debug_code) { |
| 630 | __ ldrb(r4, FieldMemOperand(map, Map::kInstanceSizeOffset)); |
| 631 | __ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2)); |
| 632 | __ Assert(eq, "Unexpected string wrapper instance size"); |
| 633 | __ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 634 | __ cmp(r4, Operand(0, RelocInfo::NONE)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 635 | __ Assert(eq, "Unexpected unused properties of string wrapper"); |
| 636 | } |
| 637 | __ str(map, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 638 | |
| 639 | __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| 640 | __ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 641 | __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 642 | |
| 643 | __ str(argument, FieldMemOperand(r0, JSValue::kValueOffset)); |
| 644 | |
| 645 | // Ensure the object is fully initialized. |
| 646 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| 647 | |
| 648 | __ Ret(); |
| 649 | |
| 650 | // The argument was not found in the number to string cache. Check |
| 651 | // if it's a string already before calling the conversion builtin. |
| 652 | Label convert_argument; |
| 653 | __ bind(¬_cached); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 654 | __ JumpIfSmi(r0, &convert_argument); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 655 | |
| 656 | // Is it a String? |
| 657 | __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 658 | __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 659 | STATIC_ASSERT(kNotStringTag != 0); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 660 | __ tst(r3, Operand(kIsNotStringMask)); |
| 661 | __ b(ne, &convert_argument); |
| 662 | __ mov(argument, r0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 663 | __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 664 | __ b(&argument_is_string); |
| 665 | |
| 666 | // Invoke the conversion builtin and put the result into r2. |
| 667 | __ bind(&convert_argument); |
| 668 | __ push(function); // Preserve the function. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 669 | __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 670 | { |
| 671 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 672 | __ push(r0); |
| 673 | __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION); |
| 674 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 675 | __ pop(function); |
| 676 | __ mov(argument, r0); |
| 677 | __ b(&argument_is_string); |
| 678 | |
| 679 | // Load the empty string into r2, remove the receiver from the |
| 680 | // stack, and jump back to the case where the argument is a string. |
| 681 | __ bind(&no_arguments); |
| 682 | __ LoadRoot(argument, Heap::kEmptyStringRootIndex); |
| 683 | __ Drop(1); |
| 684 | __ b(&argument_is_string); |
| 685 | |
| 686 | // At this point the argument is already a string. Call runtime to |
| 687 | // create a string wrapper. |
| 688 | __ bind(&gc_required); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 689 | __ IncrementCounter(counters->string_ctor_gc_required(), 1, r3, r4); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 690 | { |
| 691 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 692 | __ push(argument); |
| 693 | __ CallRuntime(Runtime::kNewStringWrapper, 1); |
| 694 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 695 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 699 | static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
| 700 | bool is_api_function, |
| 701 | bool count_constructions) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 702 | // ----------- S t a t e ------------- |
| 703 | // -- r0 : number of arguments |
| 704 | // -- r1 : constructor function |
| 705 | // -- lr : return address |
| 706 | // -- sp[...]: constructor arguments |
| 707 | // ----------------------------------- |
| 708 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 709 | // Should never count constructions for api objects. |
| 710 | ASSERT(!is_api_function || !count_constructions); |
| 711 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 712 | Isolate* isolate = masm->isolate(); |
| 713 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 714 | // Enter a construct frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 715 | { |
| 716 | FrameScope scope(masm, StackFrame::CONSTRUCT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 717 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 718 | // Preserve the two incoming parameters on the stack. |
| 719 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| 720 | __ push(r0); // Smi-tagged arguments count. |
| 721 | __ push(r1); // Constructor function. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 722 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 723 | // Try to allocate the object without transitioning into C code. If any of |
| 724 | // the preconditions is not met, the code bails out to the runtime call. |
| 725 | Label rt_call, allocated; |
| 726 | if (FLAG_inline_new) { |
| 727 | Label undo_allocation; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 728 | #ifdef ENABLE_DEBUGGER_SUPPORT |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 729 | ExternalReference debug_step_in_fp = |
| 730 | ExternalReference::debug_step_in_fp_address(isolate); |
| 731 | __ mov(r2, Operand(debug_step_in_fp)); |
| 732 | __ ldr(r2, MemOperand(r2)); |
| 733 | __ tst(r2, r2); |
| 734 | __ b(ne, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 735 | #endif |
| 736 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 737 | // Load the initial map and verify that it is in fact a map. |
| 738 | // r1: constructor function |
| 739 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 740 | __ JumpIfSmi(r2, &rt_call); |
| 741 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 742 | __ b(ne, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 743 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 744 | // Check that the constructor is not constructing a JSFunction (see |
| 745 | // comments in Runtime_NewObject in runtime.cc). In which case the |
| 746 | // initial map's instance type would be JS_FUNCTION_TYPE. |
| 747 | // r1: constructor function |
| 748 | // r2: initial map |
| 749 | __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); |
| 750 | __ b(eq, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 751 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 752 | if (count_constructions) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 753 | Label allocate; |
| 754 | // Decrease generous allocation count. |
| 755 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 756 | MemOperand constructor_count = |
| 757 | FieldMemOperand(r3, SharedFunctionInfo::kConstructionCountOffset); |
| 758 | __ ldrb(r4, constructor_count); |
| 759 | __ sub(r4, r4, Operand(1), SetCC); |
| 760 | __ strb(r4, constructor_count); |
| 761 | __ b(ne, &allocate); |
| 762 | |
| 763 | __ Push(r1, r2); |
| 764 | |
| 765 | __ push(r1); // constructor |
| 766 | // The call will replace the stub, so the countdown is only done once. |
| 767 | __ CallRuntime(Runtime::kFinalizeInstanceSize, 1); |
| 768 | |
| 769 | __ pop(r2); |
| 770 | __ pop(r1); |
| 771 | |
| 772 | __ bind(&allocate); |
| 773 | } |
| 774 | |
| 775 | // Now allocate the JSObject on the heap. |
| 776 | // r1: constructor function |
| 777 | // r2: initial map |
| 778 | __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 779 | __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS); |
| 780 | |
| 781 | // Allocated the JSObject, now initialize the fields. Map is set to |
| 782 | // initial map and properties and elements are set to empty fixed array. |
| 783 | // r1: constructor function |
| 784 | // r2: initial map |
| 785 | // r3: object size |
| 786 | // r4: JSObject (not tagged) |
| 787 | __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| 788 | __ mov(r5, r4); |
| 789 | ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| 790 | __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| 791 | ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset); |
| 792 | __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| 793 | ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset); |
| 794 | __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| 795 | |
| 796 | // Fill all the in-object properties with the appropriate filler. |
| 797 | // r1: constructor function |
| 798 | // r2: initial map |
| 799 | // r3: object size (in words) |
| 800 | // r4: JSObject (not tagged) |
| 801 | // r5: First in-object property of JSObject (not tagged) |
| 802 | __ add(r6, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| 803 | ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize); |
| 804 | __ LoadRoot(r7, Heap::kUndefinedValueRootIndex); |
| 805 | if (count_constructions) { |
| 806 | __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
| 807 | __ Ubfx(r0, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte, |
| 808 | kBitsPerByte); |
| 809 | __ add(r0, r5, Operand(r0, LSL, kPointerSizeLog2)); |
| 810 | // r0: offset of first field after pre-allocated fields |
| 811 | if (FLAG_debug_code) { |
| 812 | __ cmp(r0, r6); |
| 813 | __ Assert(le, "Unexpected number of pre-allocated property fields."); |
| 814 | } |
| 815 | __ InitializeFieldsWithFiller(r5, r0, r7); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 816 | // To allow for truncation. |
| 817 | __ LoadRoot(r7, Heap::kOnePointerFillerMapRootIndex); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 818 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 819 | __ InitializeFieldsWithFiller(r5, r6, r7); |
| 820 | |
| 821 | // Add the object tag to make the JSObject real, so that we can continue |
| 822 | // and jump into the continuation code at any time from now on. Any |
| 823 | // failures need to undo the allocation, so that the heap is in a |
| 824 | // consistent state and verifiable. |
| 825 | __ add(r4, r4, Operand(kHeapObjectTag)); |
| 826 | |
| 827 | // Check if a non-empty properties array is needed. Continue with |
| 828 | // allocated object if not fall through to runtime call if it is. |
| 829 | // r1: constructor function |
| 830 | // r4: JSObject |
| 831 | // r5: start of next object (not tagged) |
| 832 | __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset)); |
| 833 | // The field instance sizes contains both pre-allocated property fields |
| 834 | // and in-object properties. |
| 835 | __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
| 836 | __ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte, |
| 837 | kBitsPerByte); |
| 838 | __ add(r3, r3, Operand(r6)); |
| 839 | __ Ubfx(r6, r0, Map::kInObjectPropertiesByte * kBitsPerByte, |
| 840 | kBitsPerByte); |
| 841 | __ sub(r3, r3, Operand(r6), SetCC); |
| 842 | |
| 843 | // Done if no extra properties are to be allocated. |
| 844 | __ b(eq, &allocated); |
| 845 | __ Assert(pl, "Property allocation count failed."); |
| 846 | |
| 847 | // Scale the number of elements by pointer size and add the header for |
| 848 | // FixedArrays to the start of the next object calculation from above. |
| 849 | // r1: constructor |
| 850 | // r3: number of elements in properties array |
| 851 | // r4: JSObject |
| 852 | // r5: start of next object |
| 853 | __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 854 | __ AllocateInNewSpace( |
| 855 | r0, |
| 856 | r5, |
| 857 | r6, |
| 858 | r2, |
| 859 | &undo_allocation, |
| 860 | static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS)); |
| 861 | |
| 862 | // Initialize the FixedArray. |
| 863 | // r1: constructor |
| 864 | // r3: number of elements in properties array |
| 865 | // r4: JSObject |
| 866 | // r5: FixedArray (not tagged) |
| 867 | __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); |
| 868 | __ mov(r2, r5); |
| 869 | ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| 870 | __ str(r6, MemOperand(r2, kPointerSize, PostIndex)); |
| 871 | ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset); |
| 872 | __ mov(r0, Operand(r3, LSL, kSmiTagSize)); |
| 873 | __ str(r0, MemOperand(r2, kPointerSize, PostIndex)); |
| 874 | |
| 875 | // Initialize the fields to undefined. |
| 876 | // r1: constructor function |
| 877 | // r2: First element of FixedArray (not tagged) |
| 878 | // r3: number of elements in properties array |
| 879 | // r4: JSObject |
| 880 | // r5: FixedArray (not tagged) |
| 881 | __ add(r6, r2, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| 882 | ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize); |
| 883 | { Label loop, entry; |
| 884 | if (count_constructions) { |
| 885 | __ LoadRoot(r7, Heap::kUndefinedValueRootIndex); |
| 886 | } else if (FLAG_debug_code) { |
| 887 | __ LoadRoot(r8, Heap::kUndefinedValueRootIndex); |
| 888 | __ cmp(r7, r8); |
| 889 | __ Assert(eq, "Undefined value not loaded."); |
| 890 | } |
| 891 | __ b(&entry); |
| 892 | __ bind(&loop); |
| 893 | __ str(r7, MemOperand(r2, kPointerSize, PostIndex)); |
| 894 | __ bind(&entry); |
| 895 | __ cmp(r2, r6); |
| 896 | __ b(lt, &loop); |
| 897 | } |
| 898 | |
| 899 | // Store the initialized FixedArray into the properties field of |
| 900 | // the JSObject |
| 901 | // r1: constructor function |
| 902 | // r4: JSObject |
| 903 | // r5: FixedArray (not tagged) |
| 904 | __ add(r5, r5, Operand(kHeapObjectTag)); // Add the heap tag. |
| 905 | __ str(r5, FieldMemOperand(r4, JSObject::kPropertiesOffset)); |
| 906 | |
| 907 | // Continue with JSObject being successfully allocated |
| 908 | // r1: constructor function |
| 909 | // r4: JSObject |
| 910 | __ jmp(&allocated); |
| 911 | |
| 912 | // Undo the setting of the new top so that the heap is verifiable. For |
| 913 | // example, the map's unused properties potentially do not match the |
| 914 | // allocated objects unused properties. |
| 915 | // r4: JSObject (previous new top) |
| 916 | __ bind(&undo_allocation); |
| 917 | __ UndoAllocationInNewSpace(r4, r5); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 918 | } |
| 919 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 920 | // Allocate the new receiver object using the runtime call. |
Ben Murdoch | 85b7179 | 2012-04-11 18:30:58 +0100 | [diff] [blame] | 921 | // r1: constructor function |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 922 | __ bind(&rt_call); |
| 923 | __ push(r1); // argument for Runtime_NewObject |
| 924 | __ CallRuntime(Runtime::kNewObject, 1); |
| 925 | __ mov(r4, r0); |
| 926 | |
| 927 | // Receiver for constructor call allocated. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 928 | // r4: JSObject |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 929 | __ bind(&allocated); |
| 930 | __ push(r4); |
| 931 | __ push(r4); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 932 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 933 | // Reload the number of arguments and the constructor from the stack. |
| 934 | // sp[0]: receiver |
| 935 | // sp[1]: receiver |
| 936 | // sp[2]: constructor function |
| 937 | // sp[3]: number of arguments (smi-tagged) |
| 938 | __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
| 939 | __ ldr(r3, MemOperand(sp, 3 * kPointerSize)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 940 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 941 | // Set up pointer to last argument. |
| 942 | __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 943 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 944 | // Set up number of arguments for function call below |
| 945 | __ mov(r0, Operand(r3, LSR, kSmiTagSize)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 946 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 947 | // Copy arguments and receiver to the expression stack. |
| 948 | // r0: number of arguments |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame] | 949 | // r1: constructor function |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 950 | // r2: address of last argument (caller sp) |
| 951 | // r3: number of arguments (smi-tagged) |
| 952 | // sp[0]: receiver |
| 953 | // sp[1]: receiver |
| 954 | // sp[2]: constructor function |
| 955 | // sp[3]: number of arguments (smi-tagged) |
| 956 | Label loop, entry; |
| 957 | __ b(&entry); |
| 958 | __ bind(&loop); |
| 959 | __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1)); |
| 960 | __ push(ip); |
| 961 | __ bind(&entry); |
| 962 | __ sub(r3, r3, Operand(2), SetCC); |
| 963 | __ b(ge, &loop); |
| 964 | |
| 965 | // Call the function. |
| 966 | // r0: number of arguments |
| 967 | // r1: constructor function |
| 968 | if (is_api_function) { |
| 969 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 970 | Handle<Code> code = |
| 971 | masm->isolate()->builtins()->HandleApiCallConstruct(); |
| 972 | ParameterCount expected(0); |
| 973 | __ InvokeCode(code, expected, expected, |
| 974 | RelocInfo::CODE_TARGET, CALL_FUNCTION, CALL_AS_METHOD); |
| 975 | } else { |
| 976 | ParameterCount actual(r0); |
| 977 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 978 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 979 | } |
| 980 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 981 | // Store offset of return address for deoptimizer. |
| 982 | if (!is_api_function && !count_constructions) { |
| 983 | masm->isolate()->heap()->SetConstructStubDeoptPCOffset(masm->pc_offset()); |
| 984 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 985 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 986 | // Restore context from the frame. |
| 987 | // r0: result |
| 988 | // sp[0]: receiver |
| 989 | // sp[1]: constructor function |
| 990 | // sp[2]: number of arguments (smi-tagged) |
| 991 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 992 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 993 | // If the result is an object (in the ECMA sense), we should get rid |
| 994 | // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| 995 | // on page 74. |
| 996 | Label use_receiver, exit; |
| 997 | |
| 998 | // If the result is a smi, it is *not* an object in the ECMA sense. |
| 999 | // r0: result |
| 1000 | // sp[0]: receiver (newly allocated object) |
| 1001 | // sp[1]: constructor function |
| 1002 | // sp[2]: number of arguments (smi-tagged) |
| 1003 | __ JumpIfSmi(r0, &use_receiver); |
| 1004 | |
| 1005 | // If the type of the result (stored in its map) is less than |
| 1006 | // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense. |
| 1007 | __ CompareObjectType(r0, r3, r3, FIRST_SPEC_OBJECT_TYPE); |
| 1008 | __ b(ge, &exit); |
| 1009 | |
| 1010 | // Throw away the result of the constructor invocation and use the |
| 1011 | // on-stack receiver as the result. |
| 1012 | __ bind(&use_receiver); |
| 1013 | __ ldr(r0, MemOperand(sp)); |
| 1014 | |
| 1015 | // Remove receiver from the stack, remove caller arguments, and |
| 1016 | // return. |
| 1017 | __ bind(&exit); |
| 1018 | // r0: result |
| 1019 | // sp[0]: receiver (newly allocated object) |
| 1020 | // sp[1]: constructor function |
| 1021 | // sp[2]: number of arguments (smi-tagged) |
| 1022 | __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
| 1023 | |
| 1024 | // Leave construct frame. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1025 | } |
| 1026 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1027 | __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1)); |
| 1028 | __ add(sp, sp, Operand(kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1029 | __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1030 | __ Jump(lr); |
| 1031 | } |
| 1032 | |
| 1033 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1034 | void Builtins::Generate_JSConstructStubCountdown(MacroAssembler* masm) { |
| 1035 | Generate_JSConstructStubHelper(masm, false, true); |
| 1036 | } |
| 1037 | |
| 1038 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1039 | void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1040 | Generate_JSConstructStubHelper(masm, false, false); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | |
| 1044 | void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1045 | Generate_JSConstructStubHelper(masm, true, false); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1046 | } |
| 1047 | |
| 1048 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1049 | static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| 1050 | bool is_construct) { |
| 1051 | // Called from Generate_JS_Entry |
| 1052 | // r0: code entry |
| 1053 | // r1: function |
| 1054 | // r2: receiver |
| 1055 | // r3: argc |
| 1056 | // r4: argv |
| 1057 | // r5-r7, cp may be clobbered |
| 1058 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1059 | // Clear the context before we push it when entering the internal frame. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1060 | __ mov(cp, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1061 | |
| 1062 | // Enter an internal frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1063 | { |
| 1064 | FrameScope scope(masm, StackFrame::INTERNAL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1065 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1066 | // Set up the context from the function argument. |
| 1067 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1068 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1069 | __ InitializeRootRegister(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1070 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1071 | // Push the function and the receiver onto the stack. |
| 1072 | __ push(r1); |
| 1073 | __ push(r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1074 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1075 | // Copy arguments to the stack in a loop. |
| 1076 | // r1: function |
| 1077 | // r3: argc |
| 1078 | // r4: argv, i.e. points to first arg |
| 1079 | Label loop, entry; |
| 1080 | __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2)); |
| 1081 | // r2 points past last arg. |
| 1082 | __ b(&entry); |
| 1083 | __ bind(&loop); |
| 1084 | __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter |
| 1085 | __ ldr(r0, MemOperand(r0)); // dereference handle |
| 1086 | __ push(r0); // push parameter |
| 1087 | __ bind(&entry); |
| 1088 | __ cmp(r4, r2); |
| 1089 | __ b(ne, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1090 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1091 | // Initialize all JavaScript callee-saved registers, since they will be seen |
| 1092 | // by the garbage collector as part of handlers. |
| 1093 | __ LoadRoot(r4, Heap::kUndefinedValueRootIndex); |
| 1094 | __ mov(r5, Operand(r4)); |
| 1095 | __ mov(r6, Operand(r4)); |
| 1096 | __ mov(r7, Operand(r4)); |
| 1097 | if (kR9Available == 1) { |
| 1098 | __ mov(r9, Operand(r4)); |
| 1099 | } |
| 1100 | |
| 1101 | // Invoke the code and pass argc as r0. |
| 1102 | __ mov(r0, Operand(r3)); |
| 1103 | if (is_construct) { |
| 1104 | CallConstructStub stub(NO_CALL_FUNCTION_FLAGS); |
| 1105 | __ CallStub(&stub); |
| 1106 | } else { |
| 1107 | ParameterCount actual(r0); |
| 1108 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 1109 | NullCallWrapper(), CALL_AS_METHOD); |
| 1110 | } |
| 1111 | // Exit the JS frame and remove the parameters (except function), and |
| 1112 | // return. |
| 1113 | // Respect ABI stack constraint. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1114 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1115 | __ Jump(lr); |
| 1116 | |
| 1117 | // r0: result |
| 1118 | } |
| 1119 | |
| 1120 | |
| 1121 | void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 1122 | Generate_JSEntryTrampolineHelper(masm, false); |
| 1123 | } |
| 1124 | |
| 1125 | |
| 1126 | void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 1127 | Generate_JSEntryTrampolineHelper(masm, true); |
| 1128 | } |
| 1129 | |
| 1130 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1131 | void Builtins::Generate_LazyCompile(MacroAssembler* masm) { |
| 1132 | // Enter an internal frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1133 | { |
| 1134 | FrameScope scope(masm, StackFrame::INTERNAL); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1135 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1136 | // Preserve the function. |
| 1137 | __ push(r1); |
| 1138 | // Push call kind information. |
| 1139 | __ push(r5); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1140 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1141 | // Push the function on the stack as the argument to the runtime function. |
| 1142 | __ push(r1); |
| 1143 | __ CallRuntime(Runtime::kLazyCompile, 1); |
| 1144 | // Calculate the entry point. |
| 1145 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1146 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1147 | // Restore call kind information. |
| 1148 | __ pop(r5); |
| 1149 | // Restore saved function. |
| 1150 | __ pop(r1); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1151 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1152 | // Tear down internal frame. |
| 1153 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1154 | |
| 1155 | // Do a tail-call of the compiled function. |
| 1156 | __ Jump(r2); |
| 1157 | } |
| 1158 | |
| 1159 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1160 | void Builtins::Generate_LazyRecompile(MacroAssembler* masm) { |
| 1161 | // Enter an internal frame. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1162 | { |
| 1163 | FrameScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1164 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1165 | // Preserve the function. |
| 1166 | __ push(r1); |
| 1167 | // Push call kind information. |
| 1168 | __ push(r5); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1169 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1170 | // Push the function on the stack as the argument to the runtime function. |
| 1171 | __ push(r1); |
| 1172 | __ CallRuntime(Runtime::kLazyRecompile, 1); |
| 1173 | // Calculate the entry point. |
| 1174 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1175 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1176 | // Restore call kind information. |
| 1177 | __ pop(r5); |
| 1178 | // Restore saved function. |
| 1179 | __ pop(r1); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1180 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1181 | // Tear down internal frame. |
| 1182 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1183 | |
| 1184 | // Do a tail-call of the compiled function. |
| 1185 | __ Jump(r2); |
| 1186 | } |
| 1187 | |
| 1188 | |
| 1189 | static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| 1190 | Deoptimizer::BailoutType type) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1191 | { |
| 1192 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1193 | // Pass the function and deoptimization type to the runtime system. |
| 1194 | __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type)))); |
| 1195 | __ push(r0); |
| 1196 | __ CallRuntime(Runtime::kNotifyDeoptimized, 1); |
| 1197 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1198 | |
| 1199 | // Get the full codegen state from the stack and untag it -> r6. |
| 1200 | __ ldr(r6, MemOperand(sp, 0 * kPointerSize)); |
| 1201 | __ SmiUntag(r6); |
| 1202 | // Switch on the state. |
| 1203 | Label with_tos_register, unknown_state; |
| 1204 | __ cmp(r6, Operand(FullCodeGenerator::NO_REGISTERS)); |
| 1205 | __ b(ne, &with_tos_register); |
| 1206 | __ add(sp, sp, Operand(1 * kPointerSize)); // Remove state. |
| 1207 | __ Ret(); |
| 1208 | |
| 1209 | __ bind(&with_tos_register); |
| 1210 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| 1211 | __ cmp(r6, Operand(FullCodeGenerator::TOS_REG)); |
| 1212 | __ b(ne, &unknown_state); |
| 1213 | __ add(sp, sp, Operand(2 * kPointerSize)); // Remove state. |
| 1214 | __ Ret(); |
| 1215 | |
| 1216 | __ bind(&unknown_state); |
| 1217 | __ stop("no cases left"); |
| 1218 | } |
| 1219 | |
| 1220 | |
| 1221 | void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| 1222 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| 1223 | } |
| 1224 | |
| 1225 | |
| 1226 | void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| 1227 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| 1228 | } |
| 1229 | |
| 1230 | |
| 1231 | void Builtins::Generate_NotifyOSR(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1232 | // For now, we are relying on the fact that Runtime::NotifyOSR |
| 1233 | // doesn't do any garbage collection which allows us to save/restore |
| 1234 | // the registers without worrying about which of them contain |
| 1235 | // pointers. This seems a bit fragile. |
| 1236 | __ stm(db_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit()); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1237 | { |
| 1238 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1239 | __ CallRuntime(Runtime::kNotifyOSR, 0); |
| 1240 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1241 | __ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit()); |
| 1242 | __ Ret(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | |
| 1246 | void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1247 | CpuFeatures::TryForceFeatureScope scope(VFP3); |
| 1248 | if (!CpuFeatures::IsSupported(VFP3)) { |
| 1249 | __ Abort("Unreachable code: Cannot optimize without VFP3 support."); |
| 1250 | return; |
| 1251 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1252 | |
| 1253 | // Lookup the function in the JavaScript frame and push it as an |
| 1254 | // argument to the on-stack replacement function. |
| 1255 | __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1256 | { |
| 1257 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1258 | __ push(r0); |
| 1259 | __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1); |
| 1260 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1261 | |
| 1262 | // If the result was -1 it means that we couldn't optimize the |
| 1263 | // function. Just return and continue in the unoptimized version. |
| 1264 | Label skip; |
| 1265 | __ cmp(r0, Operand(Smi::FromInt(-1))); |
| 1266 | __ b(ne, &skip); |
| 1267 | __ Ret(); |
| 1268 | |
| 1269 | __ bind(&skip); |
| 1270 | // Untag the AST id and push it on the stack. |
| 1271 | __ SmiUntag(r0); |
| 1272 | __ push(r0); |
| 1273 | |
| 1274 | // Generate the code for doing the frame-to-frame translation using |
| 1275 | // the deoptimizer infrastructure. |
| 1276 | Deoptimizer::EntryGenerator generator(masm, Deoptimizer::OSR); |
| 1277 | generator.Generate(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1278 | } |
| 1279 | |
| 1280 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1281 | void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| 1282 | // 1. Make sure we have at least one argument. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1283 | // r0: actual number of arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1284 | { Label done; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1285 | __ cmp(r0, Operand(0)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1286 | __ b(ne, &done); |
| 1287 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 1288 | __ push(r2); |
| 1289 | __ add(r0, r0, Operand(1)); |
| 1290 | __ bind(&done); |
| 1291 | } |
| 1292 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1293 | // 2. Get the function to call (passed as receiver) from the stack, check |
| 1294 | // if it is a function. |
| 1295 | // r0: actual number of arguments |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1296 | Label slow, non_function; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1297 | __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1298 | __ JumpIfSmi(r1, &non_function); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1299 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1300 | __ b(ne, &slow); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1301 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1302 | // 3a. Patch the first argument if necessary when calling a function. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1303 | // r0: actual number of arguments |
| 1304 | // r1: function |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1305 | Label shift_arguments; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1306 | __ mov(r4, Operand(0, RelocInfo::NONE)); // indicate regular JS_FUNCTION |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1307 | { Label convert_to_object, use_global_receiver, patch_receiver; |
| 1308 | // Change context eagerly in case we need the global receiver. |
| 1309 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1310 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1311 | // Do not transform the receiver for strict mode functions. |
| 1312 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1313 | __ ldr(r3, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset)); |
| 1314 | __ tst(r3, Operand(1 << (SharedFunctionInfo::kStrictModeFunction + |
| 1315 | kSmiTagSize))); |
| 1316 | __ b(ne, &shift_arguments); |
| 1317 | |
| 1318 | // Do not transform the receiver for native (Compilerhints already in r3). |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1319 | __ tst(r3, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1320 | __ b(ne, &shift_arguments); |
| 1321 | |
| 1322 | // Compute the receiver in non-strict mode. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1323 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1324 | __ ldr(r2, MemOperand(r2, -kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1325 | // r0: actual number of arguments |
| 1326 | // r1: function |
| 1327 | // r2: first argument |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1328 | __ JumpIfSmi(r2, &convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1329 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1330 | __ LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| 1331 | __ cmp(r2, r3); |
| 1332 | __ b(eq, &use_global_receiver); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1333 | __ LoadRoot(r3, Heap::kNullValueRootIndex); |
| 1334 | __ cmp(r2, r3); |
| 1335 | __ b(eq, &use_global_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1336 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1337 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 1338 | __ CompareObjectType(r2, r3, r3, FIRST_SPEC_OBJECT_TYPE); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1339 | __ b(ge, &shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1340 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1341 | __ bind(&convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1342 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1343 | { |
| 1344 | // Enter an internal frame in order to preserve argument count. |
| 1345 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1346 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); // Smi-tagged. |
| 1347 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1348 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1349 | __ push(r2); |
| 1350 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 1351 | __ mov(r2, r0); |
| 1352 | |
| 1353 | __ pop(r0); |
| 1354 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
| 1355 | |
| 1356 | // Exit the internal frame. |
| 1357 | } |
| 1358 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1359 | // Restore the function to r1, and the flag to r4. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1360 | __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1361 | __ mov(r4, Operand(0, RelocInfo::NONE)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1362 | __ jmp(&patch_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1363 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1364 | // Use the global receiver object from the called function as the |
| 1365 | // receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1366 | __ bind(&use_global_receiver); |
| 1367 | const int kGlobalIndex = |
| 1368 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1369 | __ ldr(r2, FieldMemOperand(cp, kGlobalIndex)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1370 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalContextOffset)); |
| 1371 | __ ldr(r2, FieldMemOperand(r2, kGlobalIndex)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1372 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset)); |
| 1373 | |
| 1374 | __ bind(&patch_receiver); |
| 1375 | __ add(r3, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1376 | __ str(r2, MemOperand(r3, -kPointerSize)); |
| 1377 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1378 | __ jmp(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1379 | } |
| 1380 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1381 | // 3b. Check for function proxy. |
| 1382 | __ bind(&slow); |
| 1383 | __ mov(r4, Operand(1, RelocInfo::NONE)); // indicate function proxy |
| 1384 | __ cmp(r2, Operand(JS_FUNCTION_PROXY_TYPE)); |
| 1385 | __ b(eq, &shift_arguments); |
| 1386 | __ bind(&non_function); |
| 1387 | __ mov(r4, Operand(2, RelocInfo::NONE)); // indicate non-function |
| 1388 | |
| 1389 | // 3c. Patch the first argument when calling a non-function. The |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1390 | // CALL_NON_FUNCTION builtin expects the non-function callee as |
| 1391 | // receiver, so overwrite the first argument which will ultimately |
| 1392 | // become the receiver. |
| 1393 | // r0: actual number of arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1394 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1395 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1396 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1397 | __ str(r1, MemOperand(r2, -kPointerSize)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1398 | |
| 1399 | // 4. Shift arguments and return address one slot down on the stack |
| 1400 | // (overwriting the original receiver). Adjust argument count to make |
| 1401 | // the original first argument the new receiver. |
| 1402 | // r0: actual number of arguments |
| 1403 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1404 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1405 | __ bind(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1406 | { Label loop; |
| 1407 | // Calculate the copy start address (destination). Copy end address is sp. |
| 1408 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1409 | |
| 1410 | __ bind(&loop); |
| 1411 | __ ldr(ip, MemOperand(r2, -kPointerSize)); |
| 1412 | __ str(ip, MemOperand(r2)); |
| 1413 | __ sub(r2, r2, Operand(kPointerSize)); |
| 1414 | __ cmp(r2, sp); |
| 1415 | __ b(ne, &loop); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1416 | // Adjust the actual number of arguments and remove the top element |
| 1417 | // (which is a copy of the last argument). |
| 1418 | __ sub(r0, r0, Operand(1)); |
| 1419 | __ pop(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1420 | } |
| 1421 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1422 | // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin, |
| 1423 | // or a function proxy via CALL_FUNCTION_PROXY. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1424 | // r0: actual number of arguments |
| 1425 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1426 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
| 1427 | { Label function, non_proxy; |
| 1428 | __ tst(r4, r4); |
| 1429 | __ b(eq, &function); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1430 | // Expected number of arguments is 0 for CALL_NON_FUNCTION. |
| 1431 | __ mov(r2, Operand(0, RelocInfo::NONE)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1432 | __ SetCallKind(r5, CALL_AS_METHOD); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1433 | __ cmp(r4, Operand(1)); |
| 1434 | __ b(ne, &non_proxy); |
| 1435 | |
| 1436 | __ push(r1); // re-add proxy object as additional argument |
| 1437 | __ add(r0, r0, Operand(1)); |
| 1438 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY); |
| 1439 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1440 | RelocInfo::CODE_TARGET); |
| 1441 | |
| 1442 | __ bind(&non_proxy); |
| 1443 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1444 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1445 | RelocInfo::CODE_TARGET); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1446 | __ bind(&function); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1447 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1448 | |
| 1449 | // 5b. Get the code to call from the function and check that the number of |
| 1450 | // expected arguments matches what we're providing. If so, jump |
| 1451 | // (tail-call) to the code in register edx without checking arguments. |
| 1452 | // r0: actual number of arguments |
| 1453 | // r1: function |
| 1454 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 1455 | __ ldr(r2, |
| 1456 | FieldMemOperand(r3, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1457 | __ mov(r2, Operand(r2, ASR, kSmiTagSize)); |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 1458 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1459 | __ SetCallKind(r5, CALL_AS_METHOD); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1460 | __ cmp(r2, r0); // Check formal and actual parameter counts. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1461 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1462 | RelocInfo::CODE_TARGET, |
| 1463 | ne); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1464 | |
| 1465 | ParameterCount expected(0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1466 | __ InvokeCode(r3, expected, expected, JUMP_FUNCTION, |
| 1467 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1468 | } |
| 1469 | |
| 1470 | |
| 1471 | void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| 1472 | const int kIndexOffset = -5 * kPointerSize; |
| 1473 | const int kLimitOffset = -4 * kPointerSize; |
| 1474 | const int kArgsOffset = 2 * kPointerSize; |
| 1475 | const int kRecvOffset = 3 * kPointerSize; |
| 1476 | const int kFunctionOffset = 4 * kPointerSize; |
| 1477 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1478 | { |
| 1479 | FrameScope frame_scope(masm, StackFrame::INTERNAL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1480 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1481 | __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function |
| 1482 | __ push(r0); |
| 1483 | __ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array |
| 1484 | __ push(r0); |
| 1485 | __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1486 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1487 | // Check the stack for overflow. We are not trying to catch |
| 1488 | // interruptions (e.g. debug break and preemption) here, so the "real stack |
| 1489 | // limit" is checked. |
| 1490 | Label okay; |
| 1491 | __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| 1492 | // Make r2 the space we have left. The stack might already be overflowed |
| 1493 | // here which will cause r2 to become negative. |
| 1494 | __ sub(r2, sp, r2); |
| 1495 | // Check if the arguments will overflow the stack. |
| 1496 | __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1497 | __ b(gt, &okay); // Signed comparison. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1498 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1499 | // Out of stack space. |
| 1500 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1501 | __ push(r1); |
| 1502 | __ push(r0); |
| 1503 | __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| 1504 | // End of stack check. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1505 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1506 | // Push current limit and index. |
| 1507 | __ bind(&okay); |
| 1508 | __ push(r0); // limit |
| 1509 | __ mov(r1, Operand(0, RelocInfo::NONE)); // initial index |
| 1510 | __ push(r1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1511 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1512 | // Get the receiver. |
| 1513 | __ ldr(r0, MemOperand(fp, kRecvOffset)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1514 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1515 | // Check that the function is a JS function (otherwise it must be a proxy). |
| 1516 | Label push_receiver; |
| 1517 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1518 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
| 1519 | __ b(ne, &push_receiver); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1520 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1521 | // Change context eagerly to get the right global object if necessary. |
| 1522 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1523 | // Load the shared function info while the function is still in r1. |
| 1524 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1525 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1526 | // Compute the receiver. |
| 1527 | // Do not transform the receiver for strict mode functions. |
| 1528 | Label call_to_object, use_global_receiver; |
| 1529 | __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset)); |
| 1530 | __ tst(r2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction + |
| 1531 | kSmiTagSize))); |
| 1532 | __ b(ne, &push_receiver); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1533 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1534 | // Do not transform the receiver for strict mode functions. |
| 1535 | __ tst(r2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize))); |
| 1536 | __ b(ne, &push_receiver); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1537 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1538 | // Compute the receiver in non-strict mode. |
| 1539 | __ JumpIfSmi(r0, &call_to_object); |
| 1540 | __ LoadRoot(r1, Heap::kNullValueRootIndex); |
| 1541 | __ cmp(r0, r1); |
| 1542 | __ b(eq, &use_global_receiver); |
| 1543 | __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
| 1544 | __ cmp(r0, r1); |
| 1545 | __ b(eq, &use_global_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1546 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1547 | // Check if the receiver is already a JavaScript object. |
| 1548 | // r0: receiver |
| 1549 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 1550 | __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE); |
| 1551 | __ b(ge, &push_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1552 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1553 | // Convert the receiver to a regular object. |
| 1554 | // r0: receiver |
| 1555 | __ bind(&call_to_object); |
| 1556 | __ push(r0); |
| 1557 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 1558 | __ b(&push_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1559 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1560 | // Use the current global receiver object as the receiver. |
| 1561 | __ bind(&use_global_receiver); |
| 1562 | const int kGlobalOffset = |
| 1563 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1564 | __ ldr(r0, FieldMemOperand(cp, kGlobalOffset)); |
| 1565 | __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalContextOffset)); |
| 1566 | __ ldr(r0, FieldMemOperand(r0, kGlobalOffset)); |
| 1567 | __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1568 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1569 | // Push the receiver. |
| 1570 | // r0: receiver |
| 1571 | __ bind(&push_receiver); |
| 1572 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1573 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1574 | // Copy all arguments from the array to the stack. |
| 1575 | Label entry, loop; |
| 1576 | __ ldr(r0, MemOperand(fp, kIndexOffset)); |
| 1577 | __ b(&entry); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1578 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1579 | // Load the current argument from the arguments array and push it to the |
| 1580 | // stack. |
| 1581 | // r0: current argument index |
| 1582 | __ bind(&loop); |
| 1583 | __ ldr(r1, MemOperand(fp, kArgsOffset)); |
| 1584 | __ push(r1); |
| 1585 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1586 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1587 | // Call the runtime to access the property in the arguments array. |
| 1588 | __ CallRuntime(Runtime::kGetProperty, 2); |
| 1589 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1590 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1591 | // Use inline caching to access the arguments. |
| 1592 | __ ldr(r0, MemOperand(fp, kIndexOffset)); |
| 1593 | __ add(r0, r0, Operand(1 << kSmiTagSize)); |
| 1594 | __ str(r0, MemOperand(fp, kIndexOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1595 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1596 | // Test if the copy loop has finished copying all the elements from the |
| 1597 | // arguments object. |
| 1598 | __ bind(&entry); |
| 1599 | __ ldr(r1, MemOperand(fp, kLimitOffset)); |
| 1600 | __ cmp(r0, r1); |
| 1601 | __ b(ne, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1602 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1603 | // Invoke the function. |
| 1604 | Label call_proxy; |
| 1605 | ParameterCount actual(r0); |
| 1606 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
| 1607 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1608 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
| 1609 | __ b(ne, &call_proxy); |
| 1610 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 1611 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1612 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1613 | frame_scope.GenerateLeaveFrame(); |
| 1614 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 1615 | __ Jump(lr); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1616 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1617 | // Invoke the function proxy. |
| 1618 | __ bind(&call_proxy); |
| 1619 | __ push(r1); // add function proxy as last argument |
| 1620 | __ add(r0, r0, Operand(1)); |
| 1621 | __ mov(r2, Operand(0, RelocInfo::NONE)); |
| 1622 | __ SetCallKind(r5, CALL_AS_METHOD); |
| 1623 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY); |
| 1624 | __ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1625 | RelocInfo::CODE_TARGET); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1626 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1627 | // Tear down the internal frame and remove function, receiver and args. |
| 1628 | } |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1629 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 1630 | __ Jump(lr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1631 | } |
| 1632 | |
| 1633 | |
| 1634 | static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1635 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| 1636 | __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1637 | __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | fp.bit() | lr.bit()); |
| 1638 | __ add(fp, sp, Operand(3 * kPointerSize)); |
| 1639 | } |
| 1640 | |
| 1641 | |
| 1642 | static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1643 | // ----------- S t a t e ------------- |
| 1644 | // -- r0 : result being passed through |
| 1645 | // ----------------------------------- |
| 1646 | // Get the number of arguments passed (as a smi), tear down the frame and |
| 1647 | // then tear down the parameters. |
| 1648 | __ ldr(r1, MemOperand(fp, -3 * kPointerSize)); |
| 1649 | __ mov(sp, fp); |
| 1650 | __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 1651 | __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1652 | __ add(sp, sp, Operand(kPointerSize)); // adjust for receiver |
| 1653 | } |
| 1654 | |
| 1655 | |
| 1656 | void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| 1657 | // ----------- S t a t e ------------- |
| 1658 | // -- r0 : actual number of arguments |
| 1659 | // -- r1 : function (passed through to callee) |
| 1660 | // -- r2 : expected number of arguments |
| 1661 | // -- r3 : code entry to call |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1662 | // -- r5 : call kind information |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1663 | // ----------------------------------- |
| 1664 | |
| 1665 | Label invoke, dont_adapt_arguments; |
| 1666 | |
| 1667 | Label enough, too_few; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1668 | __ cmp(r0, r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1669 | __ b(lt, &too_few); |
| 1670 | __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| 1671 | __ b(eq, &dont_adapt_arguments); |
| 1672 | |
| 1673 | { // Enough parameters: actual >= expected |
| 1674 | __ bind(&enough); |
| 1675 | EnterArgumentsAdaptorFrame(masm); |
| 1676 | |
| 1677 | // Calculate copy start address into r0 and copy end address into r2. |
| 1678 | // r0: actual number of arguments as a smi |
| 1679 | // r1: function |
| 1680 | // r2: expected number of arguments |
| 1681 | // r3: code entry to call |
| 1682 | __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1683 | // adjust for return address and receiver |
| 1684 | __ add(r0, r0, Operand(2 * kPointerSize)); |
| 1685 | __ sub(r2, r0, Operand(r2, LSL, kPointerSizeLog2)); |
| 1686 | |
| 1687 | // Copy the arguments (including the receiver) to the new stack frame. |
| 1688 | // r0: copy start address |
| 1689 | // r1: function |
| 1690 | // r2: copy end address |
| 1691 | // r3: code entry to call |
| 1692 | |
| 1693 | Label copy; |
| 1694 | __ bind(©); |
| 1695 | __ ldr(ip, MemOperand(r0, 0)); |
| 1696 | __ push(ip); |
| 1697 | __ cmp(r0, r2); // Compare before moving to next argument. |
| 1698 | __ sub(r0, r0, Operand(kPointerSize)); |
| 1699 | __ b(ne, ©); |
| 1700 | |
| 1701 | __ b(&invoke); |
| 1702 | } |
| 1703 | |
| 1704 | { // Too few parameters: Actual < expected |
| 1705 | __ bind(&too_few); |
| 1706 | EnterArgumentsAdaptorFrame(masm); |
| 1707 | |
| 1708 | // Calculate copy start address into r0 and copy end address is fp. |
| 1709 | // r0: actual number of arguments as a smi |
| 1710 | // r1: function |
| 1711 | // r2: expected number of arguments |
| 1712 | // r3: code entry to call |
| 1713 | __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1714 | |
| 1715 | // Copy the arguments (including the receiver) to the new stack frame. |
| 1716 | // r0: copy start address |
| 1717 | // r1: function |
| 1718 | // r2: expected number of arguments |
| 1719 | // r3: code entry to call |
| 1720 | Label copy; |
| 1721 | __ bind(©); |
| 1722 | // Adjust load for return address and receiver. |
| 1723 | __ ldr(ip, MemOperand(r0, 2 * kPointerSize)); |
| 1724 | __ push(ip); |
| 1725 | __ cmp(r0, fp); // Compare before moving to next argument. |
| 1726 | __ sub(r0, r0, Operand(kPointerSize)); |
| 1727 | __ b(ne, ©); |
| 1728 | |
| 1729 | // Fill the remaining expected arguments with undefined. |
| 1730 | // r1: function |
| 1731 | // r2: expected number of arguments |
| 1732 | // r3: code entry to call |
| 1733 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 1734 | __ sub(r2, fp, Operand(r2, LSL, kPointerSizeLog2)); |
| 1735 | __ sub(r2, r2, Operand(4 * kPointerSize)); // Adjust for frame. |
| 1736 | |
| 1737 | Label fill; |
| 1738 | __ bind(&fill); |
| 1739 | __ push(ip); |
| 1740 | __ cmp(sp, r2); |
| 1741 | __ b(ne, &fill); |
| 1742 | } |
| 1743 | |
| 1744 | // Call the entry point. |
| 1745 | __ bind(&invoke); |
| 1746 | __ Call(r3); |
| 1747 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 1748 | // Store offset of return address for deoptimizer. |
| 1749 | masm->isolate()->heap()->SetArgumentsAdaptorDeoptPCOffset(masm->pc_offset()); |
| 1750 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1751 | // Exit frame and return. |
| 1752 | LeaveArgumentsAdaptorFrame(masm); |
| 1753 | __ Jump(lr); |
| 1754 | |
| 1755 | |
| 1756 | // ------------------------------------------- |
| 1757 | // Dont adapt arguments. |
| 1758 | // ------------------------------------------- |
| 1759 | __ bind(&dont_adapt_arguments); |
| 1760 | __ Jump(r3); |
| 1761 | } |
| 1762 | |
| 1763 | |
| 1764 | #undef __ |
| 1765 | |
| 1766 | } } // namespace v8::internal |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1767 | |
| 1768 | #endif // V8_TARGET_ARCH_ARM |