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| 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 222 __ test(scratch, Immediate(kNotStringTag)); | 222 __ test(scratch, Immediate(kNotStringTag)); |
| 223 __ j(not_zero, non_string_object, not_taken); | 223 __ j(not_zero, non_string_object, not_taken); |
| 224 } | 224 } |
| 225 | 225 |
| 226 | 226 |
| 227 void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm, | 227 void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm, |
| 228 Register receiver, | 228 Register receiver, |
| 229 Register scratch1, | 229 Register scratch1, |
| 230 Register scratch2, | 230 Register scratch2, |
| 231 Label* miss) { | 231 Label* miss) { |
| 232 Label load_length, check_wrapper; | 232 Label check_wrapper; |
| 233 | 233 |
| 234 // Check if the object is a string leaving the instance type in the | 234 // Check if the object is a string leaving the instance type in the |
| 235 // scratch register. | 235 // scratch register. |
| 236 GenerateStringCheck(masm, receiver, scratch1, miss, &check_wrapper); | 236 GenerateStringCheck(masm, receiver, scratch1, miss, &check_wrapper); |
| 237 | 237 |
| 238 // Load length from the string and convert to a smi. | 238 // Load length from the string and convert to a smi. |
| 239 __ bind(&load_length); | |
| 240 __ mov(eax, FieldOperand(receiver, String::kLengthOffset)); | 239 __ mov(eax, FieldOperand(receiver, String::kLengthOffset)); |
| 241 __ SmiTag(eax); | 240 __ SmiTag(eax); |
| 242 __ ret(0); | 241 __ ret(0); |
| 243 | 242 |
| 244 // Check if the object is a JSValue wrapper. | 243 // Check if the object is a JSValue wrapper. |
| 245 __ bind(&check_wrapper); | 244 __ bind(&check_wrapper); |
| 246 __ cmp(scratch1, JS_VALUE_TYPE); | 245 __ cmp(scratch1, JS_VALUE_TYPE); |
| 247 __ j(not_equal, miss, not_taken); | 246 __ j(not_equal, miss, not_taken); |
| 248 | 247 |
| 249 // Check if the wrapped value is a string and load the length | 248 // Check if the wrapped value is a string and load the length |
| 250 // directly if it is. | 249 // directly if it is. |
| 251 __ mov(scratch2, FieldOperand(receiver, JSValue::kValueOffset)); | 250 __ mov(scratch2, FieldOperand(receiver, JSValue::kValueOffset)); |
| 252 GenerateStringCheck(masm, scratch2, scratch1, miss, miss); | 251 GenerateStringCheck(masm, scratch2, scratch1, miss, miss); |
| 253 __ jmp(&load_length); | 252 __ mov(eax, FieldOperand(scratch2, String::kLengthOffset)); |
| 253 __ SmiTag(eax); |
| 254 __ ret(0); |
| 254 } | 255 } |
| 255 | 256 |
| 256 | 257 |
| 257 void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm, | 258 void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm, |
| 258 Register receiver, | 259 Register receiver, |
| 259 Register scratch1, | 260 Register scratch1, |
| 260 Register scratch2, | 261 Register scratch2, |
| 261 Label* miss_label) { | 262 Label* miss_label) { |
| 262 __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); | 263 __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| 263 __ mov(eax, Operand(scratch1)); | 264 __ mov(eax, Operand(scratch1)); |
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| 1943 __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET); | 1944 __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET); |
| 1944 | 1945 |
| 1945 // Return the generated code. | 1946 // Return the generated code. |
| 1946 return GetCode(); | 1947 return GetCode(); |
| 1947 } | 1948 } |
| 1948 | 1949 |
| 1949 | 1950 |
| 1950 #undef __ | 1951 #undef __ |
| 1951 | 1952 |
| 1952 } } // namespace v8::internal | 1953 } } // namespace v8::internal |
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