Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1 | // Copyright 2011 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 | |
| 75 | // Load the built-in Array function from the current context. |
| 76 | static void GenerateLoadArrayFunction(MacroAssembler* masm, Register result) { |
| 77 | // Load the global context. |
| 78 | |
| 79 | __ ldr(result, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); |
| 80 | __ ldr(result, |
| 81 | FieldMemOperand(result, GlobalObject::kGlobalContextOffset)); |
| 82 | // Load the Array function from the global context. |
| 83 | __ ldr(result, |
| 84 | MemOperand(result, |
| 85 | Context::SlotOffset(Context::ARRAY_FUNCTION_INDEX))); |
| 86 | } |
| 87 | |
| 88 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 89 | // Allocate an empty JSArray. The allocated array is put into the result |
| 90 | // register. An elements backing store is allocated with size initial_capacity |
| 91 | // and filled with the hole values. |
| 92 | static void AllocateEmptyJSArray(MacroAssembler* masm, |
| 93 | Register array_function, |
| 94 | Register result, |
| 95 | Register scratch1, |
| 96 | Register scratch2, |
| 97 | Register scratch3, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 98 | Label* gc_required) { |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 99 | const int initial_capacity = JSArray::kPreallocatedArrayElements; |
| 100 | STATIC_ASSERT(initial_capacity >= 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 101 | // Load the initial map from the array function. |
| 102 | __ ldr(scratch1, FieldMemOperand(array_function, |
| 103 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 104 | |
| 105 | // Allocate the JSArray object together with space for a fixed array with the |
| 106 | // requested elements. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 107 | int size = JSArray::kSize; |
| 108 | if (initial_capacity > 0) { |
| 109 | size += FixedArray::SizeFor(initial_capacity); |
| 110 | } |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 111 | __ AllocateInNewSpace(size, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 112 | result, |
| 113 | scratch2, |
| 114 | scratch3, |
| 115 | gc_required, |
| 116 | TAG_OBJECT); |
| 117 | |
| 118 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 119 | // array. |
| 120 | // result: JSObject |
| 121 | // scratch1: initial map |
| 122 | // scratch2: start of next object |
| 123 | __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset)); |
| 124 | __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); |
| 125 | __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset)); |
| 126 | // Field JSArray::kElementsOffset is initialized later. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 127 | __ mov(scratch3, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 128 | __ str(scratch3, FieldMemOperand(result, JSArray::kLengthOffset)); |
| 129 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 130 | if (initial_capacity == 0) { |
| 131 | __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); |
| 132 | return; |
| 133 | } |
| 134 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 135 | // Calculate the location of the elements array and set elements array member |
| 136 | // of the JSArray. |
| 137 | // result: JSObject |
| 138 | // scratch2: start of next object |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 139 | __ add(scratch1, result, Operand(JSArray::kSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 140 | __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); |
| 141 | |
| 142 | // Clear the heap tag on the elements array. |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 143 | __ sub(scratch1, scratch1, Operand(kHeapObjectTag)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 144 | |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 145 | // Initialize the FixedArray and fill it with holes. FixedArray length is |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 146 | // stored as a smi. |
| 147 | // result: JSObject |
| 148 | // scratch1: elements array (untagged) |
| 149 | // scratch2: start of next object |
| 150 | __ LoadRoot(scratch3, Heap::kFixedArrayMapRootIndex); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 151 | STATIC_ASSERT(0 * kPointerSize == FixedArray::kMapOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 152 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 153 | __ mov(scratch3, Operand(Smi::FromInt(initial_capacity))); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 154 | STATIC_ASSERT(1 * kPointerSize == FixedArray::kLengthOffset); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 155 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
| 156 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 157 | // Fill the FixedArray with the hole value. Inline the code if short. |
| 158 | STATIC_ASSERT(2 * kPointerSize == FixedArray::kHeaderSize); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 159 | __ LoadRoot(scratch3, Heap::kTheHoleValueRootIndex); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 160 | static const int kLoopUnfoldLimit = 4; |
| 161 | if (initial_capacity <= kLoopUnfoldLimit) { |
| 162 | for (int i = 0; i < initial_capacity; i++) { |
| 163 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
| 164 | } |
| 165 | } else { |
| 166 | Label loop, entry; |
| 167 | __ add(scratch2, scratch1, Operand(initial_capacity * kPointerSize)); |
| 168 | __ b(&entry); |
| 169 | __ bind(&loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 170 | __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 171 | __ bind(&entry); |
| 172 | __ cmp(scratch1, scratch2); |
| 173 | __ b(lt, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 174 | } |
| 175 | } |
| 176 | |
| 177 | // Allocate a JSArray with the number of elements stored in a register. The |
| 178 | // register array_function holds the built-in Array function and the register |
| 179 | // array_size holds the size of the array as a smi. The allocated array is put |
| 180 | // into the result register and beginning and end of the FixedArray elements |
| 181 | // storage is put into registers elements_array_storage and elements_array_end |
| 182 | // (see below for when that is not the case). If the parameter fill_with_holes |
| 183 | // is true the allocated elements backing store is filled with the hole values |
| 184 | // otherwise it is left uninitialized. When the backing store is filled the |
| 185 | // register elements_array_storage is scratched. |
| 186 | static void AllocateJSArray(MacroAssembler* masm, |
| 187 | Register array_function, // Array function. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 188 | Register array_size, // As a smi, cannot be 0. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 189 | Register result, |
| 190 | Register elements_array_storage, |
| 191 | Register elements_array_end, |
| 192 | Register scratch1, |
| 193 | Register scratch2, |
| 194 | bool fill_with_hole, |
| 195 | Label* gc_required) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 196 | // Load the initial map from the array function. |
| 197 | __ ldr(elements_array_storage, |
| 198 | FieldMemOperand(array_function, |
| 199 | JSFunction::kPrototypeOrInitialMapOffset)); |
| 200 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 201 | if (FLAG_debug_code) { // Assert that array size is not zero. |
| 202 | __ tst(array_size, array_size); |
| 203 | __ Assert(ne, "array size is unexpectedly 0"); |
| 204 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 205 | |
| 206 | // Allocate the JSArray object together with space for a FixedArray with the |
| 207 | // requested number of elements. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 208 | STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 209 | __ mov(elements_array_end, |
| 210 | Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); |
| 211 | __ add(elements_array_end, |
| 212 | elements_array_end, |
| 213 | Operand(array_size, ASR, kSmiTagSize)); |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame] | 214 | __ AllocateInNewSpace( |
| 215 | elements_array_end, |
| 216 | result, |
| 217 | scratch1, |
| 218 | scratch2, |
| 219 | gc_required, |
| 220 | static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 221 | |
| 222 | // Allocated the JSArray. Now initialize the fields except for the elements |
| 223 | // array. |
| 224 | // result: JSObject |
| 225 | // elements_array_storage: initial map |
| 226 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 227 | __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); |
| 228 | __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); |
| 229 | __ str(elements_array_storage, |
| 230 | FieldMemOperand(result, JSArray::kPropertiesOffset)); |
| 231 | // Field JSArray::kElementsOffset is initialized later. |
| 232 | __ str(array_size, FieldMemOperand(result, JSArray::kLengthOffset)); |
| 233 | |
| 234 | // Calculate the location of the elements array and set elements array member |
| 235 | // of the JSArray. |
| 236 | // result: JSObject |
| 237 | // array_size: size of array (smi) |
| 238 | __ add(elements_array_storage, result, Operand(JSArray::kSize)); |
| 239 | __ str(elements_array_storage, |
| 240 | FieldMemOperand(result, JSArray::kElementsOffset)); |
| 241 | |
| 242 | // Clear the heap tag on the elements array. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 243 | STATIC_ASSERT(kSmiTag == 0); |
Kristian Monsen | 9dcf7e2 | 2010-06-28 14:14:28 +0100 | [diff] [blame] | 244 | __ sub(elements_array_storage, |
| 245 | elements_array_storage, |
| 246 | Operand(kHeapObjectTag)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 247 | // Initialize the fixed array and fill it with holes. FixedArray length is |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 248 | // stored as a smi. |
| 249 | // result: JSObject |
| 250 | // elements_array_storage: elements array (untagged) |
| 251 | // array_size: size of array (smi) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 252 | __ LoadRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
| 253 | ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); |
| 254 | __ str(scratch1, MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 255 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 256 | ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset); |
| 257 | __ str(array_size, |
| 258 | MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
| 259 | |
| 260 | // Calculate elements array and elements array end. |
| 261 | // result: JSObject |
| 262 | // elements_array_storage: elements array element storage |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 263 | // array_size: smi-tagged size of elements array |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 264 | STATIC_ASSERT(kSmiTag == 0 && kSmiTagSize < kPointerSizeLog2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 265 | __ add(elements_array_end, |
| 266 | elements_array_storage, |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 267 | Operand(array_size, LSL, kPointerSizeLog2 - kSmiTagSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 268 | |
| 269 | // Fill the allocated FixedArray with the hole value if requested. |
| 270 | // result: JSObject |
| 271 | // elements_array_storage: elements array element storage |
| 272 | // elements_array_end: start of next object |
| 273 | if (fill_with_hole) { |
| 274 | Label loop, entry; |
| 275 | __ LoadRoot(scratch1, Heap::kTheHoleValueRootIndex); |
| 276 | __ jmp(&entry); |
| 277 | __ bind(&loop); |
| 278 | __ str(scratch1, |
| 279 | MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
| 280 | __ bind(&entry); |
| 281 | __ cmp(elements_array_storage, elements_array_end); |
| 282 | __ b(lt, &loop); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | // Create a new array for the built-in Array function. This function allocates |
| 287 | // the JSArray object and the FixedArray elements array and initializes these. |
| 288 | // If the Array cannot be constructed in native code the runtime is called. This |
| 289 | // function assumes the following state: |
| 290 | // r0: argc |
| 291 | // r1: constructor (built-in Array function) |
| 292 | // lr: return address |
| 293 | // sp[0]: last argument |
| 294 | // This function is used for both construct and normal calls of Array. The only |
| 295 | // difference between handling a construct call and a normal call is that for a |
| 296 | // construct call the constructor function in r1 needs to be preserved for |
| 297 | // entering the generic code. In both cases argc in r0 needs to be preserved. |
| 298 | // Both registers are preserved by this code so no need to differentiate between |
| 299 | // construct call and normal call. |
| 300 | static void ArrayNativeCode(MacroAssembler* masm, |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 301 | Label* call_generic_code) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 302 | Counters* counters = masm->isolate()->counters(); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 303 | Label argc_one_or_more, argc_two_or_more, not_empty_array, empty_array; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 304 | |
| 305 | // Check for array construction with zero arguments or one. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 306 | __ cmp(r0, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 307 | __ b(ne, &argc_one_or_more); |
| 308 | |
| 309 | // Handle construction of an empty array. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 310 | __ bind(&empty_array); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 311 | AllocateEmptyJSArray(masm, |
| 312 | r1, |
| 313 | r2, |
| 314 | r3, |
| 315 | r4, |
| 316 | r5, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 317 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 318 | __ IncrementCounter(counters->array_function_native(), 1, r3, r4); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 319 | // Setup return value, remove receiver from stack and return. |
| 320 | __ mov(r0, r2); |
| 321 | __ add(sp, sp, Operand(kPointerSize)); |
| 322 | __ Jump(lr); |
| 323 | |
| 324 | // Check for one argument. Bail out if argument is not smi or if it is |
| 325 | // negative. |
| 326 | __ bind(&argc_one_or_more); |
| 327 | __ cmp(r0, Operand(1)); |
| 328 | __ b(ne, &argc_two_or_more); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 329 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 330 | __ ldr(r2, MemOperand(sp)); // Get the argument from the stack. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 331 | __ tst(r2, r2); |
| 332 | __ b(ne, ¬_empty_array); |
| 333 | __ Drop(1); // Adjust stack. |
| 334 | __ mov(r0, Operand(0)); // Treat this as a call with argc of zero. |
| 335 | __ b(&empty_array); |
| 336 | |
| 337 | __ bind(¬_empty_array); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 338 | __ and_(r3, r2, Operand(kIntptrSignBit | kSmiTagMask), SetCC); |
| 339 | __ b(ne, call_generic_code); |
| 340 | |
| 341 | // Handle construction of an empty array of a certain size. Bail out if size |
| 342 | // is too large to actually allocate an elements array. |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 343 | STATIC_ASSERT(kSmiTag == 0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 344 | __ cmp(r2, Operand(JSObject::kInitialMaxFastElementArray << kSmiTagSize)); |
| 345 | __ b(ge, call_generic_code); |
| 346 | |
| 347 | // r0: argc |
| 348 | // r1: constructor |
| 349 | // r2: array_size (smi) |
| 350 | // sp[0]: argument |
| 351 | AllocateJSArray(masm, |
| 352 | r1, |
| 353 | r2, |
| 354 | r3, |
| 355 | r4, |
| 356 | r5, |
| 357 | r6, |
| 358 | r7, |
| 359 | true, |
| 360 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 361 | __ IncrementCounter(counters->array_function_native(), 1, r2, r4); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 362 | // Setup return value, remove receiver and argument from stack and return. |
| 363 | __ mov(r0, r3); |
| 364 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 365 | __ Jump(lr); |
| 366 | |
| 367 | // Handle construction of an array from a list of arguments. |
| 368 | __ bind(&argc_two_or_more); |
| 369 | __ mov(r2, Operand(r0, LSL, kSmiTagSize)); // Convet argc to a smi. |
| 370 | |
| 371 | // r0: argc |
| 372 | // r1: constructor |
| 373 | // r2: array_size (smi) |
| 374 | // sp[0]: last argument |
| 375 | AllocateJSArray(masm, |
| 376 | r1, |
| 377 | r2, |
| 378 | r3, |
| 379 | r4, |
| 380 | r5, |
| 381 | r6, |
| 382 | r7, |
| 383 | false, |
| 384 | call_generic_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 385 | __ IncrementCounter(counters->array_function_native(), 1, r2, r6); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 386 | |
| 387 | // Fill arguments as array elements. Copy from the top of the stack (last |
| 388 | // element) to the array backing store filling it backwards. Note: |
| 389 | // elements_array_end points after the backing store therefore PreIndex is |
| 390 | // used when filling the backing store. |
| 391 | // r0: argc |
| 392 | // r3: JSArray |
| 393 | // r4: elements_array storage start (untagged) |
| 394 | // r5: elements_array_end (untagged) |
| 395 | // sp[0]: last argument |
| 396 | Label loop, entry; |
| 397 | __ jmp(&entry); |
| 398 | __ bind(&loop); |
| 399 | __ ldr(r2, MemOperand(sp, kPointerSize, PostIndex)); |
| 400 | __ str(r2, MemOperand(r5, -kPointerSize, PreIndex)); |
| 401 | __ bind(&entry); |
| 402 | __ cmp(r4, r5); |
| 403 | __ b(lt, &loop); |
| 404 | |
| 405 | // Remove caller arguments and receiver from the stack, setup return value and |
| 406 | // return. |
| 407 | // r0: argc |
| 408 | // r3: JSArray |
| 409 | // sp[0]: receiver |
| 410 | __ add(sp, sp, Operand(kPointerSize)); |
| 411 | __ mov(r0, r3); |
| 412 | __ Jump(lr); |
| 413 | } |
| 414 | |
| 415 | |
| 416 | void Builtins::Generate_ArrayCode(MacroAssembler* masm) { |
| 417 | // ----------- S t a t e ------------- |
| 418 | // -- r0 : number of arguments |
| 419 | // -- lr : return address |
| 420 | // -- sp[...]: constructor arguments |
| 421 | // ----------------------------------- |
| 422 | Label generic_array_code, one_or_more_arguments, two_or_more_arguments; |
| 423 | |
| 424 | // Get the Array function. |
| 425 | GenerateLoadArrayFunction(masm, r1); |
| 426 | |
| 427 | if (FLAG_debug_code) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 428 | // Initial map for the builtin Array functions should be maps. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 429 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 430 | __ tst(r2, Operand(kSmiTagMask)); |
| 431 | __ Assert(ne, "Unexpected initial map for Array function"); |
| 432 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 433 | __ Assert(eq, "Unexpected initial map for Array function"); |
| 434 | } |
| 435 | |
| 436 | // Run the native code for the Array function called as a normal function. |
| 437 | ArrayNativeCode(masm, &generic_array_code); |
| 438 | |
| 439 | // Jump to the generic array code if the specialized code cannot handle |
| 440 | // the construction. |
| 441 | __ bind(&generic_array_code); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 442 | |
| 443 | Handle<Code> array_code = |
| 444 | masm->isolate()->builtins()->ArrayCodeGeneric(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 445 | __ Jump(array_code, RelocInfo::CODE_TARGET); |
| 446 | } |
| 447 | |
| 448 | |
| 449 | void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) { |
| 450 | // ----------- S t a t e ------------- |
| 451 | // -- r0 : number of arguments |
| 452 | // -- r1 : constructor function |
| 453 | // -- lr : return address |
| 454 | // -- sp[...]: constructor arguments |
| 455 | // ----------------------------------- |
| 456 | Label generic_constructor; |
| 457 | |
| 458 | if (FLAG_debug_code) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 459 | // The array construct code is only set for the builtin and internal |
| 460 | // Array functions which always have a map. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 461 | // Initial map for the builtin Array function should be a map. |
| 462 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 463 | __ tst(r2, Operand(kSmiTagMask)); |
| 464 | __ Assert(ne, "Unexpected initial map for Array function"); |
| 465 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 466 | __ Assert(eq, "Unexpected initial map for Array function"); |
| 467 | } |
| 468 | |
| 469 | // Run the native code for the Array function called as a constructor. |
| 470 | ArrayNativeCode(masm, &generic_constructor); |
| 471 | |
| 472 | // Jump to the generic construct code in case the specialized code cannot |
| 473 | // handle the construction. |
| 474 | __ bind(&generic_constructor); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 475 | Handle<Code> generic_construct_stub = |
| 476 | masm->isolate()->builtins()->JSConstructStubGeneric(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 477 | __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET); |
| 478 | } |
| 479 | |
| 480 | |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 481 | void Builtins::Generate_StringConstructCode(MacroAssembler* masm) { |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 482 | // ----------- S t a t e ------------- |
| 483 | // -- r0 : number of arguments |
| 484 | // -- r1 : constructor function |
| 485 | // -- lr : return address |
| 486 | // -- sp[(argc - n - 1) * 4] : arg[n] (zero based) |
| 487 | // -- sp[argc * 4] : receiver |
| 488 | // ----------------------------------- |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 489 | Counters* counters = masm->isolate()->counters(); |
| 490 | __ IncrementCounter(counters->string_ctor_calls(), 1, r2, r3); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 491 | |
| 492 | Register function = r1; |
| 493 | if (FLAG_debug_code) { |
| 494 | __ LoadGlobalFunction(Context::STRING_FUNCTION_INDEX, r2); |
| 495 | __ cmp(function, Operand(r2)); |
| 496 | __ Assert(eq, "Unexpected String function"); |
| 497 | } |
| 498 | |
| 499 | // Load the first arguments in r0 and get rid of the rest. |
| 500 | Label no_arguments; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 501 | __ cmp(r0, Operand(0, RelocInfo::NONE)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 502 | __ b(eq, &no_arguments); |
| 503 | // First args = sp[(argc - 1) * 4]. |
| 504 | __ sub(r0, r0, Operand(1)); |
| 505 | __ ldr(r0, MemOperand(sp, r0, LSL, kPointerSizeLog2, PreIndex)); |
| 506 | // sp now point to args[0], drop args[0] + receiver. |
| 507 | __ Drop(2); |
| 508 | |
| 509 | Register argument = r2; |
| 510 | Label not_cached, argument_is_string; |
| 511 | NumberToStringStub::GenerateLookupNumberStringCache( |
| 512 | masm, |
| 513 | r0, // Input. |
| 514 | argument, // Result. |
| 515 | r3, // Scratch. |
| 516 | r4, // Scratch. |
| 517 | r5, // Scratch. |
| 518 | false, // Is it a Smi? |
| 519 | ¬_cached); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 520 | __ IncrementCounter(counters->string_ctor_cached_number(), 1, r3, r4); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 521 | __ bind(&argument_is_string); |
| 522 | |
| 523 | // ----------- S t a t e ------------- |
| 524 | // -- r2 : argument converted to string |
| 525 | // -- r1 : constructor function |
| 526 | // -- lr : return address |
| 527 | // ----------------------------------- |
| 528 | |
| 529 | Label gc_required; |
| 530 | __ AllocateInNewSpace(JSValue::kSize, |
| 531 | r0, // Result. |
| 532 | r3, // Scratch. |
| 533 | r4, // Scratch. |
| 534 | &gc_required, |
| 535 | TAG_OBJECT); |
| 536 | |
| 537 | // Initialising the String Object. |
| 538 | Register map = r3; |
| 539 | __ LoadGlobalFunctionInitialMap(function, map, r4); |
| 540 | if (FLAG_debug_code) { |
| 541 | __ ldrb(r4, FieldMemOperand(map, Map::kInstanceSizeOffset)); |
| 542 | __ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2)); |
| 543 | __ Assert(eq, "Unexpected string wrapper instance size"); |
| 544 | __ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 545 | __ cmp(r4, Operand(0, RelocInfo::NONE)); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 546 | __ Assert(eq, "Unexpected unused properties of string wrapper"); |
| 547 | } |
| 548 | __ str(map, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 549 | |
| 550 | __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex); |
| 551 | __ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset)); |
| 552 | __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset)); |
| 553 | |
| 554 | __ str(argument, FieldMemOperand(r0, JSValue::kValueOffset)); |
| 555 | |
| 556 | // Ensure the object is fully initialized. |
| 557 | STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize); |
| 558 | |
| 559 | __ Ret(); |
| 560 | |
| 561 | // The argument was not found in the number to string cache. Check |
| 562 | // if it's a string already before calling the conversion builtin. |
| 563 | Label convert_argument; |
| 564 | __ bind(¬_cached); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 565 | __ JumpIfSmi(r0, &convert_argument); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 566 | |
| 567 | // Is it a String? |
| 568 | __ ldr(r2, FieldMemOperand(r0, HeapObject::kMapOffset)); |
| 569 | __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceTypeOffset)); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 570 | STATIC_ASSERT(kNotStringTag != 0); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 571 | __ tst(r3, Operand(kIsNotStringMask)); |
| 572 | __ b(ne, &convert_argument); |
| 573 | __ mov(argument, r0); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 574 | __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4); |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 575 | __ b(&argument_is_string); |
| 576 | |
| 577 | // Invoke the conversion builtin and put the result into r2. |
| 578 | __ bind(&convert_argument); |
| 579 | __ push(function); // Preserve the function. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 580 | __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 581 | { |
| 582 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 583 | __ push(r0); |
| 584 | __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION); |
| 585 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 586 | __ pop(function); |
| 587 | __ mov(argument, r0); |
| 588 | __ b(&argument_is_string); |
| 589 | |
| 590 | // Load the empty string into r2, remove the receiver from the |
| 591 | // stack, and jump back to the case where the argument is a string. |
| 592 | __ bind(&no_arguments); |
| 593 | __ LoadRoot(argument, Heap::kEmptyStringRootIndex); |
| 594 | __ Drop(1); |
| 595 | __ b(&argument_is_string); |
| 596 | |
| 597 | // At this point the argument is already a string. Call runtime to |
| 598 | // create a string wrapper. |
| 599 | __ bind(&gc_required); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 600 | __ IncrementCounter(counters->string_ctor_gc_required(), 1, r3, r4); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 601 | { |
| 602 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 603 | __ push(argument); |
| 604 | __ CallRuntime(Runtime::kNewStringWrapper, 1); |
| 605 | } |
Shimeng (Simon) Wang | 8a31eba | 2010-12-06 19:01:33 -0800 | [diff] [blame] | 606 | __ Ret(); |
Kristian Monsen | 80d68ea | 2010-09-08 11:05:35 +0100 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 610 | void Builtins::Generate_JSConstructCall(MacroAssembler* masm) { |
| 611 | // ----------- S t a t e ------------- |
| 612 | // -- r0 : number of arguments |
| 613 | // -- r1 : constructor function |
| 614 | // -- lr : return address |
| 615 | // -- sp[...]: constructor arguments |
| 616 | // ----------------------------------- |
| 617 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 618 | Label slow, non_function_call; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 619 | // Check that the function is not a smi. |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 620 | __ JumpIfSmi(r1, &non_function_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 621 | // Check that the function is a JSFunction. |
| 622 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 623 | __ b(ne, &slow); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 624 | |
| 625 | // Jump to the function-specific construct stub. |
| 626 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 627 | __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kConstructStubOffset)); |
| 628 | __ add(pc, r2, Operand(Code::kHeaderSize - kHeapObjectTag)); |
| 629 | |
| 630 | // r0: number of arguments |
| 631 | // r1: called object |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 632 | // r2: object type |
| 633 | Label do_call; |
| 634 | __ bind(&slow); |
| 635 | __ cmp(r2, Operand(JS_FUNCTION_PROXY_TYPE)); |
| 636 | __ b(ne, &non_function_call); |
| 637 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY_AS_CONSTRUCTOR); |
| 638 | __ jmp(&do_call); |
| 639 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 640 | __ bind(&non_function_call); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 641 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION_AS_CONSTRUCTOR); |
| 642 | __ bind(&do_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 643 | // Set expected number of arguments to zero (not changing r0). |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 644 | __ mov(r2, Operand(0, RelocInfo::NONE)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 645 | __ SetCallKind(r5, CALL_AS_METHOD); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 646 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 647 | RelocInfo::CODE_TARGET); |
| 648 | } |
| 649 | |
| 650 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 651 | static void Generate_JSConstructStubHelper(MacroAssembler* masm, |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 652 | bool is_api_function, |
| 653 | bool count_constructions) { |
| 654 | // Should never count constructions for api objects. |
| 655 | ASSERT(!is_api_function || !count_constructions); |
| 656 | |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 657 | Isolate* isolate = masm->isolate(); |
| 658 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 659 | // Enter a construct frame. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 660 | { |
| 661 | FrameScope scope(masm, StackFrame::CONSTRUCT); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 662 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 663 | // Preserve the two incoming parameters on the stack. |
| 664 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| 665 | __ push(r0); // Smi-tagged arguments count. |
| 666 | __ push(r1); // Constructor function. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 667 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 668 | // Try to allocate the object without transitioning into C code. If any of |
| 669 | // the preconditions is not met, the code bails out to the runtime call. |
| 670 | Label rt_call, allocated; |
| 671 | if (FLAG_inline_new) { |
| 672 | Label undo_allocation; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 673 | #ifdef ENABLE_DEBUGGER_SUPPORT |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 674 | ExternalReference debug_step_in_fp = |
| 675 | ExternalReference::debug_step_in_fp_address(isolate); |
| 676 | __ mov(r2, Operand(debug_step_in_fp)); |
| 677 | __ ldr(r2, MemOperand(r2)); |
| 678 | __ tst(r2, r2); |
| 679 | __ b(ne, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 680 | #endif |
| 681 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 682 | // Load the initial map and verify that it is in fact a map. |
| 683 | // r1: constructor function |
| 684 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset)); |
| 685 | __ JumpIfSmi(r2, &rt_call); |
| 686 | __ CompareObjectType(r2, r3, r4, MAP_TYPE); |
| 687 | __ b(ne, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 688 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 689 | // Check that the constructor is not constructing a JSFunction (see |
| 690 | // comments in Runtime_NewObject in runtime.cc). In which case the |
| 691 | // initial map's instance type would be JS_FUNCTION_TYPE. |
| 692 | // r1: constructor function |
| 693 | // r2: initial map |
| 694 | __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); |
| 695 | __ b(eq, &rt_call); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 696 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 697 | if (count_constructions) { |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 698 | Label allocate; |
| 699 | // Decrease generous allocation count. |
| 700 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 701 | MemOperand constructor_count = |
| 702 | FieldMemOperand(r3, SharedFunctionInfo::kConstructionCountOffset); |
| 703 | __ ldrb(r4, constructor_count); |
| 704 | __ sub(r4, r4, Operand(1), SetCC); |
| 705 | __ strb(r4, constructor_count); |
| 706 | __ b(ne, &allocate); |
| 707 | |
| 708 | __ Push(r1, r2); |
| 709 | |
| 710 | __ push(r1); // constructor |
| 711 | // The call will replace the stub, so the countdown is only done once. |
| 712 | __ CallRuntime(Runtime::kFinalizeInstanceSize, 1); |
| 713 | |
| 714 | __ pop(r2); |
| 715 | __ pop(r1); |
| 716 | |
| 717 | __ bind(&allocate); |
| 718 | } |
| 719 | |
| 720 | // Now allocate the JSObject on the heap. |
| 721 | // r1: constructor function |
| 722 | // r2: initial map |
| 723 | __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 724 | __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS); |
| 725 | |
| 726 | // Allocated the JSObject, now initialize the fields. Map is set to |
| 727 | // initial map and properties and elements are set to empty fixed array. |
| 728 | // r1: constructor function |
| 729 | // r2: initial map |
| 730 | // r3: object size |
| 731 | // r4: JSObject (not tagged) |
| 732 | __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| 733 | __ mov(r5, r4); |
| 734 | ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| 735 | __ str(r2, MemOperand(r5, kPointerSize, PostIndex)); |
| 736 | ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset); |
| 737 | __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| 738 | ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset); |
| 739 | __ str(r6, MemOperand(r5, kPointerSize, PostIndex)); |
| 740 | |
| 741 | // Fill all the in-object properties with the appropriate filler. |
| 742 | // r1: constructor function |
| 743 | // r2: initial map |
| 744 | // r3: object size (in words) |
| 745 | // r4: JSObject (not tagged) |
| 746 | // r5: First in-object property of JSObject (not tagged) |
| 747 | __ add(r6, r4, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| 748 | ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize); |
| 749 | __ LoadRoot(r7, Heap::kUndefinedValueRootIndex); |
| 750 | if (count_constructions) { |
| 751 | __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
| 752 | __ Ubfx(r0, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte, |
| 753 | kBitsPerByte); |
| 754 | __ add(r0, r5, Operand(r0, LSL, kPointerSizeLog2)); |
| 755 | // r0: offset of first field after pre-allocated fields |
| 756 | if (FLAG_debug_code) { |
| 757 | __ cmp(r0, r6); |
| 758 | __ Assert(le, "Unexpected number of pre-allocated property fields."); |
| 759 | } |
| 760 | __ InitializeFieldsWithFiller(r5, r0, r7); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 761 | // To allow for truncation. |
| 762 | __ LoadRoot(r7, Heap::kOnePointerFillerMapRootIndex); |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 763 | } |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 764 | __ InitializeFieldsWithFiller(r5, r6, r7); |
| 765 | |
| 766 | // Add the object tag to make the JSObject real, so that we can continue |
| 767 | // and jump into the continuation code at any time from now on. Any |
| 768 | // failures need to undo the allocation, so that the heap is in a |
| 769 | // consistent state and verifiable. |
| 770 | __ add(r4, r4, Operand(kHeapObjectTag)); |
| 771 | |
| 772 | // Check if a non-empty properties array is needed. Continue with |
| 773 | // allocated object if not fall through to runtime call if it is. |
| 774 | // r1: constructor function |
| 775 | // r4: JSObject |
| 776 | // r5: start of next object (not tagged) |
| 777 | __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset)); |
| 778 | // The field instance sizes contains both pre-allocated property fields |
| 779 | // and in-object properties. |
| 780 | __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
| 781 | __ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * kBitsPerByte, |
| 782 | kBitsPerByte); |
| 783 | __ add(r3, r3, Operand(r6)); |
| 784 | __ Ubfx(r6, r0, Map::kInObjectPropertiesByte * kBitsPerByte, |
| 785 | kBitsPerByte); |
| 786 | __ sub(r3, r3, Operand(r6), SetCC); |
| 787 | |
| 788 | // Done if no extra properties are to be allocated. |
| 789 | __ b(eq, &allocated); |
| 790 | __ Assert(pl, "Property allocation count failed."); |
| 791 | |
| 792 | // Scale the number of elements by pointer size and add the header for |
| 793 | // FixedArrays to the start of the next object calculation from above. |
| 794 | // r1: constructor |
| 795 | // r3: number of elements in properties array |
| 796 | // r4: JSObject |
| 797 | // r5: start of next object |
| 798 | __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 799 | __ AllocateInNewSpace( |
| 800 | r0, |
| 801 | r5, |
| 802 | r6, |
| 803 | r2, |
| 804 | &undo_allocation, |
| 805 | static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS)); |
| 806 | |
| 807 | // Initialize the FixedArray. |
| 808 | // r1: constructor |
| 809 | // r3: number of elements in properties array |
| 810 | // r4: JSObject |
| 811 | // r5: FixedArray (not tagged) |
| 812 | __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); |
| 813 | __ mov(r2, r5); |
| 814 | ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
| 815 | __ str(r6, MemOperand(r2, kPointerSize, PostIndex)); |
| 816 | ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset); |
| 817 | __ mov(r0, Operand(r3, LSL, kSmiTagSize)); |
| 818 | __ str(r0, MemOperand(r2, kPointerSize, PostIndex)); |
| 819 | |
| 820 | // Initialize the fields to undefined. |
| 821 | // r1: constructor function |
| 822 | // r2: First element of FixedArray (not tagged) |
| 823 | // r3: number of elements in properties array |
| 824 | // r4: JSObject |
| 825 | // r5: FixedArray (not tagged) |
| 826 | __ add(r6, r2, Operand(r3, LSL, kPointerSizeLog2)); // End of object. |
| 827 | ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize); |
| 828 | { Label loop, entry; |
| 829 | if (count_constructions) { |
| 830 | __ LoadRoot(r7, Heap::kUndefinedValueRootIndex); |
| 831 | } else if (FLAG_debug_code) { |
| 832 | __ LoadRoot(r8, Heap::kUndefinedValueRootIndex); |
| 833 | __ cmp(r7, r8); |
| 834 | __ Assert(eq, "Undefined value not loaded."); |
| 835 | } |
| 836 | __ b(&entry); |
| 837 | __ bind(&loop); |
| 838 | __ str(r7, MemOperand(r2, kPointerSize, PostIndex)); |
| 839 | __ bind(&entry); |
| 840 | __ cmp(r2, r6); |
| 841 | __ b(lt, &loop); |
| 842 | } |
| 843 | |
| 844 | // Store the initialized FixedArray into the properties field of |
| 845 | // the JSObject |
| 846 | // r1: constructor function |
| 847 | // r4: JSObject |
| 848 | // r5: FixedArray (not tagged) |
| 849 | __ add(r5, r5, Operand(kHeapObjectTag)); // Add the heap tag. |
| 850 | __ str(r5, FieldMemOperand(r4, JSObject::kPropertiesOffset)); |
| 851 | |
| 852 | // Continue with JSObject being successfully allocated |
| 853 | // r1: constructor function |
| 854 | // r4: JSObject |
| 855 | __ jmp(&allocated); |
| 856 | |
| 857 | // Undo the setting of the new top so that the heap is verifiable. For |
| 858 | // example, the map's unused properties potentially do not match the |
| 859 | // allocated objects unused properties. |
| 860 | // r4: JSObject (previous new top) |
| 861 | __ bind(&undo_allocation); |
| 862 | __ UndoAllocationInNewSpace(r4, r5); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 863 | } |
| 864 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 865 | // Allocate the new receiver object using the runtime call. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 866 | // r1: constructor function |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 867 | __ bind(&rt_call); |
| 868 | __ push(r1); // argument for Runtime_NewObject |
| 869 | __ CallRuntime(Runtime::kNewObject, 1); |
| 870 | __ mov(r4, r0); |
| 871 | |
| 872 | // Receiver for constructor call allocated. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 873 | // r4: JSObject |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 874 | __ bind(&allocated); |
| 875 | __ push(r4); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 876 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 877 | // Push the function and the allocated receiver from the stack. |
| 878 | // sp[0]: receiver (newly allocated object) |
| 879 | // sp[1]: constructor function |
| 880 | // sp[2]: number of arguments (smi-tagged) |
| 881 | __ ldr(r1, MemOperand(sp, kPointerSize)); |
| 882 | __ push(r1); // Constructor function. |
| 883 | __ push(r4); // Receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 884 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 885 | // Reload the number of arguments from the stack. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 886 | // r1: constructor function |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 887 | // sp[0]: receiver |
| 888 | // sp[1]: constructor function |
| 889 | // sp[2]: receiver |
| 890 | // sp[3]: constructor function |
| 891 | // sp[4]: number of arguments (smi-tagged) |
| 892 | __ ldr(r3, MemOperand(sp, 4 * kPointerSize)); |
| 893 | |
| 894 | // Setup pointer to last argument. |
| 895 | __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset)); |
| 896 | |
| 897 | // Setup number of arguments for function call below |
| 898 | __ mov(r0, Operand(r3, LSR, kSmiTagSize)); |
| 899 | |
| 900 | // Copy arguments and receiver to the expression stack. |
| 901 | // r0: number of arguments |
| 902 | // r2: address of last argument (caller sp) |
| 903 | // r1: constructor function |
| 904 | // r3: number of arguments (smi-tagged) |
| 905 | // sp[0]: receiver |
| 906 | // sp[1]: constructor function |
| 907 | // sp[2]: receiver |
| 908 | // sp[3]: constructor function |
| 909 | // sp[4]: number of arguments (smi-tagged) |
| 910 | Label loop, entry; |
| 911 | __ b(&entry); |
| 912 | __ bind(&loop); |
| 913 | __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1)); |
| 914 | __ push(ip); |
| 915 | __ bind(&entry); |
| 916 | __ sub(r3, r3, Operand(2), SetCC); |
| 917 | __ b(ge, &loop); |
| 918 | |
| 919 | // Call the function. |
| 920 | // r0: number of arguments |
| 921 | // r1: constructor function |
| 922 | if (is_api_function) { |
| 923 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 924 | Handle<Code> code = |
| 925 | masm->isolate()->builtins()->HandleApiCallConstruct(); |
| 926 | ParameterCount expected(0); |
| 927 | __ InvokeCode(code, expected, expected, |
| 928 | RelocInfo::CODE_TARGET, CALL_FUNCTION, CALL_AS_METHOD); |
| 929 | } else { |
| 930 | ParameterCount actual(r0); |
| 931 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 932 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 933 | } |
| 934 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 935 | // Pop the function from the stack. |
| 936 | // sp[0]: constructor function |
| 937 | // sp[2]: receiver |
| 938 | // sp[3]: constructor function |
| 939 | // sp[4]: number of arguments (smi-tagged) |
| 940 | __ pop(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 941 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 942 | // Restore context from the frame. |
| 943 | // r0: result |
| 944 | // sp[0]: receiver |
| 945 | // sp[1]: constructor function |
| 946 | // sp[2]: number of arguments (smi-tagged) |
| 947 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 948 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 949 | // If the result is an object (in the ECMA sense), we should get rid |
| 950 | // of the receiver and use the result; see ECMA-262 section 13.2.2-7 |
| 951 | // on page 74. |
| 952 | Label use_receiver, exit; |
| 953 | |
| 954 | // If the result is a smi, it is *not* an object in the ECMA sense. |
| 955 | // r0: result |
| 956 | // sp[0]: receiver (newly allocated object) |
| 957 | // sp[1]: constructor function |
| 958 | // sp[2]: number of arguments (smi-tagged) |
| 959 | __ JumpIfSmi(r0, &use_receiver); |
| 960 | |
| 961 | // If the type of the result (stored in its map) is less than |
| 962 | // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense. |
| 963 | __ CompareObjectType(r0, r3, r3, FIRST_SPEC_OBJECT_TYPE); |
| 964 | __ b(ge, &exit); |
| 965 | |
| 966 | // Throw away the result of the constructor invocation and use the |
| 967 | // on-stack receiver as the result. |
| 968 | __ bind(&use_receiver); |
| 969 | __ ldr(r0, MemOperand(sp)); |
| 970 | |
| 971 | // Remove receiver from the stack, remove caller arguments, and |
| 972 | // return. |
| 973 | __ bind(&exit); |
| 974 | // r0: result |
| 975 | // sp[0]: receiver (newly allocated object) |
| 976 | // sp[1]: constructor function |
| 977 | // sp[2]: number of arguments (smi-tagged) |
| 978 | __ ldr(r1, MemOperand(sp, 2 * kPointerSize)); |
| 979 | |
| 980 | // Leave construct frame. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 981 | } |
| 982 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 983 | __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1)); |
| 984 | __ add(sp, sp, Operand(kPointerSize)); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 985 | __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 986 | __ Jump(lr); |
| 987 | } |
| 988 | |
| 989 | |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 990 | void Builtins::Generate_JSConstructStubCountdown(MacroAssembler* masm) { |
| 991 | Generate_JSConstructStubHelper(masm, false, true); |
| 992 | } |
| 993 | |
| 994 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 995 | void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 996 | Generate_JSConstructStubHelper(masm, false, false); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | |
| 1000 | void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) { |
Kristian Monsen | 0d5e116 | 2010-09-30 15:31:59 +0100 | [diff] [blame] | 1001 | Generate_JSConstructStubHelper(masm, true, false); |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1005 | static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm, |
| 1006 | bool is_construct) { |
| 1007 | // Called from Generate_JS_Entry |
| 1008 | // r0: code entry |
| 1009 | // r1: function |
| 1010 | // r2: receiver |
| 1011 | // r3: argc |
| 1012 | // r4: argv |
| 1013 | // r5-r7, cp may be clobbered |
| 1014 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1015 | // Clear the context before we push it when entering the internal frame. |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1016 | __ mov(cp, Operand(0, RelocInfo::NONE)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1017 | |
| 1018 | // Enter an internal frame. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1019 | { |
| 1020 | FrameScope scope(masm, StackFrame::INTERNAL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1021 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1022 | // Set up the context from the function argument. |
| 1023 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1024 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1025 | // Set up the roots register. |
| 1026 | ExternalReference roots_array_start = |
| 1027 | ExternalReference::roots_array_start(masm->isolate()); |
| 1028 | __ mov(r10, Operand(roots_array_start)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1029 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1030 | // Push the function and the receiver onto the stack. |
| 1031 | __ push(r1); |
| 1032 | __ push(r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1033 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1034 | // Copy arguments to the stack in a loop. |
| 1035 | // r1: function |
| 1036 | // r3: argc |
| 1037 | // r4: argv, i.e. points to first arg |
| 1038 | Label loop, entry; |
| 1039 | __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2)); |
| 1040 | // r2 points past last arg. |
| 1041 | __ b(&entry); |
| 1042 | __ bind(&loop); |
| 1043 | __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex)); // read next parameter |
| 1044 | __ ldr(r0, MemOperand(r0)); // dereference handle |
| 1045 | __ push(r0); // push parameter |
| 1046 | __ bind(&entry); |
| 1047 | __ cmp(r4, r2); |
| 1048 | __ b(ne, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1049 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1050 | // Initialize all JavaScript callee-saved registers, since they will be seen |
| 1051 | // by the garbage collector as part of handlers. |
| 1052 | __ LoadRoot(r4, Heap::kUndefinedValueRootIndex); |
| 1053 | __ mov(r5, Operand(r4)); |
| 1054 | __ mov(r6, Operand(r4)); |
| 1055 | __ mov(r7, Operand(r4)); |
| 1056 | if (kR9Available == 1) { |
| 1057 | __ mov(r9, Operand(r4)); |
| 1058 | } |
| 1059 | |
| 1060 | // Invoke the code and pass argc as r0. |
| 1061 | __ mov(r0, Operand(r3)); |
| 1062 | if (is_construct) { |
| 1063 | __ Call(masm->isolate()->builtins()->JSConstructCall()); |
| 1064 | } else { |
| 1065 | ParameterCount actual(r0); |
| 1066 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 1067 | NullCallWrapper(), CALL_AS_METHOD); |
| 1068 | } |
| 1069 | // Exit the JS frame and remove the parameters (except function), and |
| 1070 | // return. |
| 1071 | // Respect ABI stack constraint. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1072 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1073 | __ Jump(lr); |
| 1074 | |
| 1075 | // r0: result |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 1080 | Generate_JSEntryTrampolineHelper(masm, false); |
| 1081 | } |
| 1082 | |
| 1083 | |
| 1084 | void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 1085 | Generate_JSEntryTrampolineHelper(masm, true); |
| 1086 | } |
| 1087 | |
| 1088 | |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1089 | void Builtins::Generate_LazyCompile(MacroAssembler* masm) { |
| 1090 | // Enter an internal frame. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1091 | { |
| 1092 | FrameScope scope(masm, StackFrame::INTERNAL); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1093 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1094 | // Preserve the function. |
| 1095 | __ push(r1); |
| 1096 | // Push call kind information. |
| 1097 | __ push(r5); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1098 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1099 | // Push the function on the stack as the argument to the runtime function. |
| 1100 | __ push(r1); |
| 1101 | __ CallRuntime(Runtime::kLazyCompile, 1); |
| 1102 | // Calculate the entry point. |
| 1103 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1104 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1105 | // Restore call kind information. |
| 1106 | __ pop(r5); |
| 1107 | // Restore saved function. |
| 1108 | __ pop(r1); |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1109 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1110 | // Tear down internal frame. |
| 1111 | } |
Iain Merrick | 7568138 | 2010-08-19 15:07:18 +0100 | [diff] [blame] | 1112 | |
| 1113 | // Do a tail-call of the compiled function. |
| 1114 | __ Jump(r2); |
| 1115 | } |
| 1116 | |
| 1117 | |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1118 | void Builtins::Generate_LazyRecompile(MacroAssembler* masm) { |
| 1119 | // Enter an internal frame. |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1120 | { |
| 1121 | FrameScope scope(masm, StackFrame::INTERNAL); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1122 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1123 | // Preserve the function. |
| 1124 | __ push(r1); |
| 1125 | // Push call kind information. |
| 1126 | __ push(r5); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1127 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1128 | // Push the function on the stack as the argument to the runtime function. |
| 1129 | __ push(r1); |
| 1130 | __ CallRuntime(Runtime::kLazyRecompile, 1); |
| 1131 | // Calculate the entry point. |
| 1132 | __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1133 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1134 | // Restore call kind information. |
| 1135 | __ pop(r5); |
| 1136 | // Restore saved function. |
| 1137 | __ pop(r1); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1138 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1139 | // Tear down internal frame. |
| 1140 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1141 | |
| 1142 | // Do a tail-call of the compiled function. |
| 1143 | __ Jump(r2); |
| 1144 | } |
| 1145 | |
| 1146 | |
| 1147 | static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm, |
| 1148 | Deoptimizer::BailoutType type) { |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1149 | { |
| 1150 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1151 | // Pass the function and deoptimization type to the runtime system. |
| 1152 | __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type)))); |
| 1153 | __ push(r0); |
| 1154 | __ CallRuntime(Runtime::kNotifyDeoptimized, 1); |
| 1155 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1156 | |
| 1157 | // Get the full codegen state from the stack and untag it -> r6. |
| 1158 | __ ldr(r6, MemOperand(sp, 0 * kPointerSize)); |
| 1159 | __ SmiUntag(r6); |
| 1160 | // Switch on the state. |
| 1161 | Label with_tos_register, unknown_state; |
| 1162 | __ cmp(r6, Operand(FullCodeGenerator::NO_REGISTERS)); |
| 1163 | __ b(ne, &with_tos_register); |
| 1164 | __ add(sp, sp, Operand(1 * kPointerSize)); // Remove state. |
| 1165 | __ Ret(); |
| 1166 | |
| 1167 | __ bind(&with_tos_register); |
| 1168 | __ ldr(r0, MemOperand(sp, 1 * kPointerSize)); |
| 1169 | __ cmp(r6, Operand(FullCodeGenerator::TOS_REG)); |
| 1170 | __ b(ne, &unknown_state); |
| 1171 | __ add(sp, sp, Operand(2 * kPointerSize)); // Remove state. |
| 1172 | __ Ret(); |
| 1173 | |
| 1174 | __ bind(&unknown_state); |
| 1175 | __ stop("no cases left"); |
| 1176 | } |
| 1177 | |
| 1178 | |
| 1179 | void Builtins::Generate_NotifyDeoptimized(MacroAssembler* masm) { |
| 1180 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::EAGER); |
| 1181 | } |
| 1182 | |
| 1183 | |
| 1184 | void Builtins::Generate_NotifyLazyDeoptimized(MacroAssembler* masm) { |
| 1185 | Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY); |
| 1186 | } |
| 1187 | |
| 1188 | |
| 1189 | void Builtins::Generate_NotifyOSR(MacroAssembler* masm) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1190 | // For now, we are relying on the fact that Runtime::NotifyOSR |
| 1191 | // doesn't do any garbage collection which allows us to save/restore |
| 1192 | // the registers without worrying about which of them contain |
| 1193 | // pointers. This seems a bit fragile. |
| 1194 | __ stm(db_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit()); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1195 | { |
| 1196 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1197 | __ CallRuntime(Runtime::kNotifyOSR, 0); |
| 1198 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1199 | __ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit()); |
| 1200 | __ Ret(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1201 | } |
| 1202 | |
| 1203 | |
| 1204 | void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) { |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 1205 | CpuFeatures::TryForceFeatureScope scope(VFP3); |
| 1206 | if (!CpuFeatures::IsSupported(VFP3)) { |
| 1207 | __ Abort("Unreachable code: Cannot optimize without VFP3 support."); |
| 1208 | return; |
| 1209 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1210 | |
| 1211 | // Lookup the function in the JavaScript frame and push it as an |
| 1212 | // argument to the on-stack replacement function. |
| 1213 | __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset)); |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1214 | { |
| 1215 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1216 | __ push(r0); |
| 1217 | __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1); |
| 1218 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1219 | |
| 1220 | // If the result was -1 it means that we couldn't optimize the |
| 1221 | // function. Just return and continue in the unoptimized version. |
| 1222 | Label skip; |
| 1223 | __ cmp(r0, Operand(Smi::FromInt(-1))); |
| 1224 | __ b(ne, &skip); |
| 1225 | __ Ret(); |
| 1226 | |
| 1227 | __ bind(&skip); |
| 1228 | // Untag the AST id and push it on the stack. |
| 1229 | __ SmiUntag(r0); |
| 1230 | __ push(r0); |
| 1231 | |
| 1232 | // Generate the code for doing the frame-to-frame translation using |
| 1233 | // the deoptimizer infrastructure. |
| 1234 | Deoptimizer::EntryGenerator generator(masm, Deoptimizer::OSR); |
| 1235 | generator.Generate(); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 1236 | } |
| 1237 | |
| 1238 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1239 | void Builtins::Generate_FunctionCall(MacroAssembler* masm) { |
| 1240 | // 1. Make sure we have at least one argument. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1241 | // r0: actual number of arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1242 | { Label done; |
| 1243 | __ tst(r0, Operand(r0)); |
| 1244 | __ b(ne, &done); |
| 1245 | __ LoadRoot(r2, Heap::kUndefinedValueRootIndex); |
| 1246 | __ push(r2); |
| 1247 | __ add(r0, r0, Operand(1)); |
| 1248 | __ bind(&done); |
| 1249 | } |
| 1250 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1251 | // 2. Get the function to call (passed as receiver) from the stack, check |
| 1252 | // if it is a function. |
| 1253 | // r0: actual number of arguments |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1254 | Label slow, non_function; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1255 | __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1256 | __ JumpIfSmi(r1, &non_function); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1257 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1258 | __ b(ne, &slow); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1259 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1260 | // 3a. Patch the first argument if necessary when calling a function. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1261 | // r0: actual number of arguments |
| 1262 | // r1: function |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1263 | Label shift_arguments; |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1264 | __ mov(r4, Operand(0, RelocInfo::NONE)); // indicate regular JS_FUNCTION |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1265 | { Label convert_to_object, use_global_receiver, patch_receiver; |
| 1266 | // Change context eagerly in case we need the global receiver. |
| 1267 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1268 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1269 | // Do not transform the receiver for strict mode functions. |
| 1270 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1271 | __ ldr(r3, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset)); |
| 1272 | __ tst(r3, Operand(1 << (SharedFunctionInfo::kStrictModeFunction + |
| 1273 | kSmiTagSize))); |
| 1274 | __ b(ne, &shift_arguments); |
| 1275 | |
| 1276 | // Do not transform the receiver for native (Compilerhints already in r3). |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1277 | __ tst(r3, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize))); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1278 | __ b(ne, &shift_arguments); |
| 1279 | |
| 1280 | // Compute the receiver in non-strict mode. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1281 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1282 | __ ldr(r2, MemOperand(r2, -kPointerSize)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1283 | // r0: actual number of arguments |
| 1284 | // r1: function |
| 1285 | // r2: first argument |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1286 | __ JumpIfSmi(r2, &convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1287 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1288 | __ LoadRoot(r3, Heap::kUndefinedValueRootIndex); |
| 1289 | __ cmp(r2, r3); |
| 1290 | __ b(eq, &use_global_receiver); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1291 | __ LoadRoot(r3, Heap::kNullValueRootIndex); |
| 1292 | __ cmp(r2, r3); |
| 1293 | __ b(eq, &use_global_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1294 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1295 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 1296 | __ CompareObjectType(r2, r3, r3, FIRST_SPEC_OBJECT_TYPE); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1297 | __ b(ge, &shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1298 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1299 | __ bind(&convert_to_object); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1300 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1301 | { |
| 1302 | // Enter an internal frame in order to preserve argument count. |
| 1303 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 1304 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); // Smi-tagged. |
| 1305 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1306 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1307 | __ push(r2); |
| 1308 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 1309 | __ mov(r2, r0); |
| 1310 | |
| 1311 | __ pop(r0); |
| 1312 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
| 1313 | |
| 1314 | // Exit the internal frame. |
| 1315 | } |
| 1316 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1317 | // Restore the function to r1, and the flag to r4. |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1318 | __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1319 | __ mov(r4, Operand(0, RelocInfo::NONE)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1320 | __ jmp(&patch_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1321 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1322 | // Use the global receiver object from the called function as the |
| 1323 | // receiver. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1324 | __ bind(&use_global_receiver); |
| 1325 | const int kGlobalIndex = |
| 1326 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1327 | __ ldr(r2, FieldMemOperand(cp, kGlobalIndex)); |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1328 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalContextOffset)); |
| 1329 | __ ldr(r2, FieldMemOperand(r2, kGlobalIndex)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1330 | __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset)); |
| 1331 | |
| 1332 | __ bind(&patch_receiver); |
| 1333 | __ add(r3, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1334 | __ str(r2, MemOperand(r3, -kPointerSize)); |
| 1335 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1336 | __ jmp(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1337 | } |
| 1338 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1339 | // 3b. Check for function proxy. |
| 1340 | __ bind(&slow); |
| 1341 | __ mov(r4, Operand(1, RelocInfo::NONE)); // indicate function proxy |
| 1342 | __ cmp(r2, Operand(JS_FUNCTION_PROXY_TYPE)); |
| 1343 | __ b(eq, &shift_arguments); |
| 1344 | __ bind(&non_function); |
| 1345 | __ mov(r4, Operand(2, RelocInfo::NONE)); // indicate non-function |
| 1346 | |
| 1347 | // 3c. Patch the first argument when calling a non-function. The |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1348 | // CALL_NON_FUNCTION builtin expects the non-function callee as |
| 1349 | // receiver, so overwrite the first argument which will ultimately |
| 1350 | // become the receiver. |
| 1351 | // r0: actual number of arguments |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1352 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1353 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1354 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
| 1355 | __ str(r1, MemOperand(r2, -kPointerSize)); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1356 | |
| 1357 | // 4. Shift arguments and return address one slot down on the stack |
| 1358 | // (overwriting the original receiver). Adjust argument count to make |
| 1359 | // the original first argument the new receiver. |
| 1360 | // r0: actual number of arguments |
| 1361 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1362 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1363 | __ bind(&shift_arguments); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1364 | { Label loop; |
| 1365 | // Calculate the copy start address (destination). Copy end address is sp. |
| 1366 | __ add(r2, sp, Operand(r0, LSL, kPointerSizeLog2)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1367 | |
| 1368 | __ bind(&loop); |
| 1369 | __ ldr(ip, MemOperand(r2, -kPointerSize)); |
| 1370 | __ str(ip, MemOperand(r2)); |
| 1371 | __ sub(r2, r2, Operand(kPointerSize)); |
| 1372 | __ cmp(r2, sp); |
| 1373 | __ b(ne, &loop); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1374 | // Adjust the actual number of arguments and remove the top element |
| 1375 | // (which is a copy of the last argument). |
| 1376 | __ sub(r0, r0, Operand(1)); |
| 1377 | __ pop(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1378 | } |
| 1379 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1380 | // 5a. Call non-function via tail call to CALL_NON_FUNCTION builtin, |
| 1381 | // or a function proxy via CALL_FUNCTION_PROXY. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1382 | // r0: actual number of arguments |
| 1383 | // r1: function |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1384 | // r4: call type (0: JS function, 1: function proxy, 2: non-function) |
| 1385 | { Label function, non_proxy; |
| 1386 | __ tst(r4, r4); |
| 1387 | __ b(eq, &function); |
Iain Merrick | 9ac36c9 | 2010-09-13 15:29:50 +0100 | [diff] [blame] | 1388 | // Expected number of arguments is 0 for CALL_NON_FUNCTION. |
| 1389 | __ mov(r2, Operand(0, RelocInfo::NONE)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1390 | __ SetCallKind(r5, CALL_AS_METHOD); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1391 | __ cmp(r4, Operand(1)); |
| 1392 | __ b(ne, &non_proxy); |
| 1393 | |
| 1394 | __ push(r1); // re-add proxy object as additional argument |
| 1395 | __ add(r0, r0, Operand(1)); |
| 1396 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY); |
| 1397 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1398 | RelocInfo::CODE_TARGET); |
| 1399 | |
| 1400 | __ bind(&non_proxy); |
| 1401 | __ GetBuiltinEntry(r3, Builtins::CALL_NON_FUNCTION); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1402 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1403 | RelocInfo::CODE_TARGET); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1404 | __ bind(&function); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1405 | } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1406 | |
| 1407 | // 5b. Get the code to call from the function and check that the number of |
| 1408 | // expected arguments matches what we're providing. If so, jump |
| 1409 | // (tail-call) to the code in register edx without checking arguments. |
| 1410 | // r0: actual number of arguments |
| 1411 | // r1: function |
| 1412 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
| 1413 | __ ldr(r2, |
| 1414 | FieldMemOperand(r3, SharedFunctionInfo::kFormalParameterCountOffset)); |
Ben Murdoch | 7f4d5bd | 2010-06-15 11:15:29 +0100 | [diff] [blame] | 1415 | __ mov(r2, Operand(r2, ASR, kSmiTagSize)); |
Steve Block | 791712a | 2010-08-27 10:21:07 +0100 | [diff] [blame] | 1416 | __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset)); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1417 | __ SetCallKind(r5, CALL_AS_METHOD); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1418 | __ cmp(r2, r0); // Check formal and actual parameter counts. |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 1419 | __ Jump(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1420 | RelocInfo::CODE_TARGET, |
| 1421 | ne); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1422 | |
| 1423 | ParameterCount expected(0); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1424 | __ InvokeCode(r3, expected, expected, JUMP_FUNCTION, |
| 1425 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1426 | } |
| 1427 | |
| 1428 | |
| 1429 | void Builtins::Generate_FunctionApply(MacroAssembler* masm) { |
| 1430 | const int kIndexOffset = -5 * kPointerSize; |
| 1431 | const int kLimitOffset = -4 * kPointerSize; |
| 1432 | const int kArgsOffset = 2 * kPointerSize; |
| 1433 | const int kRecvOffset = 3 * kPointerSize; |
| 1434 | const int kFunctionOffset = 4 * kPointerSize; |
| 1435 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1436 | { |
| 1437 | FrameScope frame_scope(masm, StackFrame::INTERNAL); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1438 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1439 | __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function |
| 1440 | __ push(r0); |
| 1441 | __ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array |
| 1442 | __ push(r0); |
| 1443 | __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1444 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1445 | // Check the stack for overflow. We are not trying to catch |
| 1446 | // interruptions (e.g. debug break and preemption) here, so the "real stack |
| 1447 | // limit" is checked. |
| 1448 | Label okay; |
| 1449 | __ LoadRoot(r2, Heap::kRealStackLimitRootIndex); |
| 1450 | // Make r2 the space we have left. The stack might already be overflowed |
| 1451 | // here which will cause r2 to become negative. |
| 1452 | __ sub(r2, sp, r2); |
| 1453 | // Check if the arguments will overflow the stack. |
| 1454 | __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1455 | __ b(gt, &okay); // Signed comparison. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1456 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1457 | // Out of stack space. |
| 1458 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1459 | __ push(r1); |
| 1460 | __ push(r0); |
| 1461 | __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION); |
| 1462 | // End of stack check. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1463 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1464 | // Push current limit and index. |
| 1465 | __ bind(&okay); |
| 1466 | __ push(r0); // limit |
| 1467 | __ mov(r1, Operand(0, RelocInfo::NONE)); // initial index |
| 1468 | __ push(r1); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1469 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1470 | // Get the receiver. |
| 1471 | __ ldr(r0, MemOperand(fp, kRecvOffset)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1472 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1473 | // Check that the function is a JS function (otherwise it must be a proxy). |
| 1474 | Label push_receiver; |
| 1475 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1476 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
| 1477 | __ b(ne, &push_receiver); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1478 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1479 | // Change context eagerly to get the right global object if necessary. |
| 1480 | __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); |
| 1481 | // Load the shared function info while the function is still in r1. |
| 1482 | __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1483 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1484 | // Compute the receiver. |
| 1485 | // Do not transform the receiver for strict mode functions. |
| 1486 | Label call_to_object, use_global_receiver; |
| 1487 | __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset)); |
| 1488 | __ tst(r2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction + |
| 1489 | kSmiTagSize))); |
| 1490 | __ b(ne, &push_receiver); |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1491 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1492 | // Do not transform the receiver for strict mode functions. |
| 1493 | __ tst(r2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize))); |
| 1494 | __ b(ne, &push_receiver); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1495 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1496 | // Compute the receiver in non-strict mode. |
| 1497 | __ JumpIfSmi(r0, &call_to_object); |
| 1498 | __ LoadRoot(r1, Heap::kNullValueRootIndex); |
| 1499 | __ cmp(r0, r1); |
| 1500 | __ b(eq, &use_global_receiver); |
| 1501 | __ LoadRoot(r1, Heap::kUndefinedValueRootIndex); |
| 1502 | __ cmp(r0, r1); |
| 1503 | __ b(eq, &use_global_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1504 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1505 | // Check if the receiver is already a JavaScript object. |
| 1506 | // r0: receiver |
| 1507 | STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE); |
| 1508 | __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE); |
| 1509 | __ b(ge, &push_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1510 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1511 | // Convert the receiver to a regular object. |
| 1512 | // r0: receiver |
| 1513 | __ bind(&call_to_object); |
| 1514 | __ push(r0); |
| 1515 | __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); |
| 1516 | __ b(&push_receiver); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1517 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1518 | // Use the current global receiver object as the receiver. |
| 1519 | __ bind(&use_global_receiver); |
| 1520 | const int kGlobalOffset = |
| 1521 | Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 1522 | __ ldr(r0, FieldMemOperand(cp, kGlobalOffset)); |
| 1523 | __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalContextOffset)); |
| 1524 | __ ldr(r0, FieldMemOperand(r0, kGlobalOffset)); |
| 1525 | __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1526 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1527 | // Push the receiver. |
| 1528 | // r0: receiver |
| 1529 | __ bind(&push_receiver); |
| 1530 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1531 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1532 | // Copy all arguments from the array to the stack. |
| 1533 | Label entry, loop; |
| 1534 | __ ldr(r0, MemOperand(fp, kIndexOffset)); |
| 1535 | __ b(&entry); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1536 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1537 | // Load the current argument from the arguments array and push it to the |
| 1538 | // stack. |
| 1539 | // r0: current argument index |
| 1540 | __ bind(&loop); |
| 1541 | __ ldr(r1, MemOperand(fp, kArgsOffset)); |
| 1542 | __ push(r1); |
| 1543 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1544 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1545 | // Call the runtime to access the property in the arguments array. |
| 1546 | __ CallRuntime(Runtime::kGetProperty, 2); |
| 1547 | __ push(r0); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1548 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1549 | // Use inline caching to access the arguments. |
| 1550 | __ ldr(r0, MemOperand(fp, kIndexOffset)); |
| 1551 | __ add(r0, r0, Operand(1 << kSmiTagSize)); |
| 1552 | __ str(r0, MemOperand(fp, kIndexOffset)); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1553 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1554 | // Test if the copy loop has finished copying all the elements from the |
| 1555 | // arguments object. |
| 1556 | __ bind(&entry); |
| 1557 | __ ldr(r1, MemOperand(fp, kLimitOffset)); |
| 1558 | __ cmp(r0, r1); |
| 1559 | __ b(ne, &loop); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1560 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1561 | // Invoke the function. |
| 1562 | Label call_proxy; |
| 1563 | ParameterCount actual(r0); |
| 1564 | __ mov(r0, Operand(r0, ASR, kSmiTagSize)); |
| 1565 | __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
| 1566 | __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE); |
| 1567 | __ b(ne, &call_proxy); |
| 1568 | __ InvokeFunction(r1, actual, CALL_FUNCTION, |
| 1569 | NullCallWrapper(), CALL_AS_METHOD); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1570 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1571 | frame_scope.GenerateLeaveFrame(); |
| 1572 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 1573 | __ Jump(lr); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1574 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1575 | // Invoke the function proxy. |
| 1576 | __ bind(&call_proxy); |
| 1577 | __ push(r1); // add function proxy as last argument |
| 1578 | __ add(r0, r0, Operand(1)); |
| 1579 | __ mov(r2, Operand(0, RelocInfo::NONE)); |
| 1580 | __ SetCallKind(r5, CALL_AS_METHOD); |
| 1581 | __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY); |
| 1582 | __ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(), |
| 1583 | RelocInfo::CODE_TARGET); |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1584 | |
Ben Murdoch | 592a9fc | 2012-03-05 11:04:45 +0000 | [diff] [blame^] | 1585 | // Tear down the internal frame and remove function, receiver and args. |
| 1586 | } |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1587 | __ add(sp, sp, Operand(3 * kPointerSize)); |
| 1588 | __ Jump(lr); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1589 | } |
| 1590 | |
| 1591 | |
| 1592 | static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1593 | __ mov(r0, Operand(r0, LSL, kSmiTagSize)); |
| 1594 | __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR))); |
| 1595 | __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | fp.bit() | lr.bit()); |
| 1596 | __ add(fp, sp, Operand(3 * kPointerSize)); |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | static void LeaveArgumentsAdaptorFrame(MacroAssembler* masm) { |
| 1601 | // ----------- S t a t e ------------- |
| 1602 | // -- r0 : result being passed through |
| 1603 | // ----------------------------------- |
| 1604 | // Get the number of arguments passed (as a smi), tear down the frame and |
| 1605 | // then tear down the parameters. |
| 1606 | __ ldr(r1, MemOperand(fp, -3 * kPointerSize)); |
| 1607 | __ mov(sp, fp); |
| 1608 | __ ldm(ia_w, sp, fp.bit() | lr.bit()); |
| 1609 | __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1610 | __ add(sp, sp, Operand(kPointerSize)); // adjust for receiver |
| 1611 | } |
| 1612 | |
| 1613 | |
| 1614 | void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) { |
| 1615 | // ----------- S t a t e ------------- |
| 1616 | // -- r0 : actual number of arguments |
| 1617 | // -- r1 : function (passed through to callee) |
| 1618 | // -- r2 : expected number of arguments |
| 1619 | // -- r3 : code entry to call |
Ben Murdoch | 257744e | 2011-11-30 15:57:28 +0000 | [diff] [blame] | 1620 | // -- r5 : call kind information |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1621 | // ----------------------------------- |
| 1622 | |
| 1623 | Label invoke, dont_adapt_arguments; |
| 1624 | |
| 1625 | Label enough, too_few; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1626 | __ cmp(r0, r2); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1627 | __ b(lt, &too_few); |
| 1628 | __ cmp(r2, Operand(SharedFunctionInfo::kDontAdaptArgumentsSentinel)); |
| 1629 | __ b(eq, &dont_adapt_arguments); |
| 1630 | |
| 1631 | { // Enough parameters: actual >= expected |
| 1632 | __ bind(&enough); |
| 1633 | EnterArgumentsAdaptorFrame(masm); |
| 1634 | |
| 1635 | // Calculate copy start address into r0 and copy end address into r2. |
| 1636 | // r0: actual number of arguments as a smi |
| 1637 | // r1: function |
| 1638 | // r2: expected number of arguments |
| 1639 | // r3: code entry to call |
| 1640 | __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1641 | // adjust for return address and receiver |
| 1642 | __ add(r0, r0, Operand(2 * kPointerSize)); |
| 1643 | __ sub(r2, r0, Operand(r2, LSL, kPointerSizeLog2)); |
| 1644 | |
| 1645 | // Copy the arguments (including the receiver) to the new stack frame. |
| 1646 | // r0: copy start address |
| 1647 | // r1: function |
| 1648 | // r2: copy end address |
| 1649 | // r3: code entry to call |
| 1650 | |
| 1651 | Label copy; |
| 1652 | __ bind(©); |
| 1653 | __ ldr(ip, MemOperand(r0, 0)); |
| 1654 | __ push(ip); |
| 1655 | __ cmp(r0, r2); // Compare before moving to next argument. |
| 1656 | __ sub(r0, r0, Operand(kPointerSize)); |
| 1657 | __ b(ne, ©); |
| 1658 | |
| 1659 | __ b(&invoke); |
| 1660 | } |
| 1661 | |
| 1662 | { // Too few parameters: Actual < expected |
| 1663 | __ bind(&too_few); |
| 1664 | EnterArgumentsAdaptorFrame(masm); |
| 1665 | |
| 1666 | // Calculate copy start address into r0 and copy end address is fp. |
| 1667 | // r0: actual number of arguments as a smi |
| 1668 | // r1: function |
| 1669 | // r2: expected number of arguments |
| 1670 | // r3: code entry to call |
| 1671 | __ add(r0, fp, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
| 1672 | |
| 1673 | // Copy the arguments (including the receiver) to the new stack frame. |
| 1674 | // r0: copy start address |
| 1675 | // r1: function |
| 1676 | // r2: expected number of arguments |
| 1677 | // r3: code entry to call |
| 1678 | Label copy; |
| 1679 | __ bind(©); |
| 1680 | // Adjust load for return address and receiver. |
| 1681 | __ ldr(ip, MemOperand(r0, 2 * kPointerSize)); |
| 1682 | __ push(ip); |
| 1683 | __ cmp(r0, fp); // Compare before moving to next argument. |
| 1684 | __ sub(r0, r0, Operand(kPointerSize)); |
| 1685 | __ b(ne, ©); |
| 1686 | |
| 1687 | // Fill the remaining expected arguments with undefined. |
| 1688 | // r1: function |
| 1689 | // r2: expected number of arguments |
| 1690 | // r3: code entry to call |
| 1691 | __ LoadRoot(ip, Heap::kUndefinedValueRootIndex); |
| 1692 | __ sub(r2, fp, Operand(r2, LSL, kPointerSizeLog2)); |
| 1693 | __ sub(r2, r2, Operand(4 * kPointerSize)); // Adjust for frame. |
| 1694 | |
| 1695 | Label fill; |
| 1696 | __ bind(&fill); |
| 1697 | __ push(ip); |
| 1698 | __ cmp(sp, r2); |
| 1699 | __ b(ne, &fill); |
| 1700 | } |
| 1701 | |
| 1702 | // Call the entry point. |
| 1703 | __ bind(&invoke); |
| 1704 | __ Call(r3); |
| 1705 | |
| 1706 | // Exit frame and return. |
| 1707 | LeaveArgumentsAdaptorFrame(masm); |
| 1708 | __ Jump(lr); |
| 1709 | |
| 1710 | |
| 1711 | // ------------------------------------------- |
| 1712 | // Dont adapt arguments. |
| 1713 | // ------------------------------------------- |
| 1714 | __ bind(&dont_adapt_arguments); |
| 1715 | __ Jump(r3); |
| 1716 | } |
| 1717 | |
| 1718 | |
| 1719 | #undef __ |
| 1720 | |
| 1721 | } } // namespace v8::internal |
Leon Clarke | f7060e2 | 2010-06-03 12:02:55 +0100 | [diff] [blame] | 1722 | |
| 1723 | #endif // V8_TARGET_ARCH_ARM |