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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/v8.h" | 5 #include "src/v8.h" |
| 6 | 6 |
| 7 #if V8_TARGET_ARCH_X87 | 7 #if V8_TARGET_ARCH_X87 |
| 8 | 8 |
| 9 #include "src/base/bits.h" | 9 #include "src/base/bits.h" |
| 10 #include "src/base/division-by-constant.h" | 10 #include "src/base/division-by-constant.h" |
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| 2041 | 2041 |
| 2042 void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, | 2042 void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
| 2043 int num_arguments, | 2043 int num_arguments, |
| 2044 int result_size) { | 2044 int result_size) { |
| 2045 TailCallExternalReference(ExternalReference(fid, isolate()), | 2045 TailCallExternalReference(ExternalReference(fid, isolate()), |
| 2046 num_arguments, | 2046 num_arguments, |
| 2047 result_size); | 2047 result_size); |
| 2048 } | 2048 } |
| 2049 | 2049 |
| 2050 | 2050 |
| 2051 Operand ApiParameterOperand(int index) { | |
| 2052 return Operand(esp, index * kPointerSize); | |
| 2053 } | |
| 2054 | |
| 2055 | |
| 2056 void MacroAssembler::PrepareCallApiFunction(int argc) { | |
| 2057 EnterApiExitFrame(argc); | |
| 2058 if (emit_debug_code()) { | |
| 2059 mov(esi, Immediate(bit_cast<int32_t>(kZapValue))); | |
| 2060 } | |
| 2061 } | |
| 2062 | |
| 2063 | |
| 2064 void MacroAssembler::CallApiFunctionAndReturn( | |
| 2065 Register function_address, ExternalReference thunk_ref, | |
| 2066 Operand thunk_last_arg, int stack_space, Operand* stack_space_operand, | |
| 2067 Operand return_value_operand, Operand* context_restore_operand) { | |
| 2068 ExternalReference next_address = | |
| 2069 ExternalReference::handle_scope_next_address(isolate()); | |
| 2070 ExternalReference limit_address = | |
| 2071 ExternalReference::handle_scope_limit_address(isolate()); | |
| 2072 ExternalReference level_address = | |
| 2073 ExternalReference::handle_scope_level_address(isolate()); | |
| 2074 | |
| 2075 DCHECK(edx.is(function_address)); | |
| 2076 // Allocate HandleScope in callee-save registers. | |
| 2077 mov(ebx, Operand::StaticVariable(next_address)); | |
| 2078 mov(edi, Operand::StaticVariable(limit_address)); | |
| 2079 add(Operand::StaticVariable(level_address), Immediate(1)); | |
| 2080 | |
| 2081 if (FLAG_log_timer_events) { | |
| 2082 FrameScope frame(this, StackFrame::MANUAL); | |
| 2083 PushSafepointRegisters(); | |
| 2084 PrepareCallCFunction(1, eax); | |
| 2085 mov(Operand(esp, 0), | |
| 2086 Immediate(ExternalReference::isolate_address(isolate()))); | |
| 2087 CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1); | |
| 2088 PopSafepointRegisters(); | |
| 2089 } | |
| 2090 | |
| 2091 | |
| 2092 Label profiler_disabled; | |
| 2093 Label end_profiler_check; | |
| 2094 mov(eax, Immediate(ExternalReference::is_profiling_address(isolate()))); | |
| 2095 cmpb(Operand(eax, 0), 0); | |
| 2096 j(zero, &profiler_disabled); | |
| 2097 | |
| 2098 // Additional parameter is the address of the actual getter function. | |
| 2099 mov(thunk_last_arg, function_address); | |
| 2100 // Call the api function. | |
| 2101 mov(eax, Immediate(thunk_ref)); | |
| 2102 call(eax); | |
| 2103 jmp(&end_profiler_check); | |
| 2104 | |
| 2105 bind(&profiler_disabled); | |
| 2106 // Call the api function. | |
| 2107 call(function_address); | |
| 2108 bind(&end_profiler_check); | |
| 2109 | |
| 2110 if (FLAG_log_timer_events) { | |
| 2111 FrameScope frame(this, StackFrame::MANUAL); | |
| 2112 PushSafepointRegisters(); | |
| 2113 PrepareCallCFunction(1, eax); | |
| 2114 mov(Operand(esp, 0), | |
| 2115 Immediate(ExternalReference::isolate_address(isolate()))); | |
| 2116 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); | |
| 2117 PopSafepointRegisters(); | |
| 2118 } | |
| 2119 | |
| 2120 Label prologue; | |
| 2121 // Load the value from ReturnValue | |
| 2122 mov(eax, return_value_operand); | |
| 2123 | |
| 2124 Label promote_scheduled_exception; | |
| 2125 Label exception_handled; | |
| 2126 Label delete_allocated_handles; | |
| 2127 Label leave_exit_frame; | |
| 2128 | |
| 2129 bind(&prologue); | |
| 2130 // No more valid handles (the result handle was the last one). Restore | |
| 2131 // previous handle scope. | |
| 2132 mov(Operand::StaticVariable(next_address), ebx); | |
| 2133 sub(Operand::StaticVariable(level_address), Immediate(1)); | |
| 2134 Assert(above_equal, kInvalidHandleScopeLevel); | |
| 2135 cmp(edi, Operand::StaticVariable(limit_address)); | |
| 2136 j(not_equal, &delete_allocated_handles); | |
| 2137 bind(&leave_exit_frame); | |
| 2138 | |
| 2139 // Check if the function scheduled an exception. | |
| 2140 ExternalReference scheduled_exception_address = | |
| 2141 ExternalReference::scheduled_exception_address(isolate()); | |
| 2142 cmp(Operand::StaticVariable(scheduled_exception_address), | |
| 2143 Immediate(isolate()->factory()->the_hole_value())); | |
| 2144 j(not_equal, &promote_scheduled_exception); | |
| 2145 bind(&exception_handled); | |
| 2146 | |
| 2147 #if DEBUG | |
| 2148 // Check if the function returned a valid JavaScript value. | |
| 2149 Label ok; | |
| 2150 Register return_value = eax; | |
| 2151 Register map = ecx; | |
| 2152 | |
| 2153 JumpIfSmi(return_value, &ok, Label::kNear); | |
| 2154 mov(map, FieldOperand(return_value, HeapObject::kMapOffset)); | |
| 2155 | |
| 2156 CmpInstanceType(map, LAST_NAME_TYPE); | |
| 2157 j(below_equal, &ok, Label::kNear); | |
| 2158 | |
| 2159 CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE); | |
| 2160 j(above_equal, &ok, Label::kNear); | |
| 2161 | |
| 2162 cmp(map, isolate()->factory()->heap_number_map()); | |
| 2163 j(equal, &ok, Label::kNear); | |
| 2164 | |
| 2165 cmp(return_value, isolate()->factory()->undefined_value()); | |
| 2166 j(equal, &ok, Label::kNear); | |
| 2167 | |
| 2168 cmp(return_value, isolate()->factory()->true_value()); | |
| 2169 j(equal, &ok, Label::kNear); | |
| 2170 | |
| 2171 cmp(return_value, isolate()->factory()->false_value()); | |
| 2172 j(equal, &ok, Label::kNear); | |
| 2173 | |
| 2174 cmp(return_value, isolate()->factory()->null_value()); | |
| 2175 j(equal, &ok, Label::kNear); | |
| 2176 | |
| 2177 Abort(kAPICallReturnedInvalidObject); | |
| 2178 | |
| 2179 bind(&ok); | |
| 2180 #endif | |
| 2181 | |
| 2182 bool restore_context = context_restore_operand != NULL; | |
| 2183 if (restore_context) { | |
| 2184 mov(esi, *context_restore_operand); | |
| 2185 } | |
| 2186 if (stack_space_operand != nullptr) { | |
| 2187 mov(ebx, *stack_space_operand); | |
| 2188 } | |
| 2189 LeaveApiExitFrame(!restore_context); | |
| 2190 if (stack_space_operand != nullptr) { | |
| 2191 DCHECK_EQ(0, stack_space); | |
| 2192 pop(ecx); | |
| 2193 add(esp, ebx); | |
| 2194 jmp(ecx); | |
| 2195 } else { | |
| 2196 ret(stack_space * kPointerSize); | |
| 2197 } | |
| 2198 | |
| 2199 bind(&promote_scheduled_exception); | |
| 2200 { | |
| 2201 FrameScope frame(this, StackFrame::INTERNAL); | |
| 2202 CallRuntime(Runtime::kPromoteScheduledException, 0); | |
| 2203 } | |
| 2204 jmp(&exception_handled); | |
| 2205 | |
| 2206 // HandleScope limit has changed. Delete allocated extensions. | |
| 2207 ExternalReference delete_extensions = | |
| 2208 ExternalReference::delete_handle_scope_extensions(isolate()); | |
| 2209 bind(&delete_allocated_handles); | |
| 2210 mov(Operand::StaticVariable(limit_address), edi); | |
| 2211 mov(edi, eax); | |
| 2212 mov(Operand(esp, 0), | |
| 2213 Immediate(ExternalReference::isolate_address(isolate()))); | |
| 2214 mov(eax, Immediate(delete_extensions)); | |
| 2215 call(eax); | |
| 2216 mov(eax, edi); | |
| 2217 jmp(&leave_exit_frame); | |
| 2218 } | |
| 2219 | |
| 2220 | |
| 2221 void MacroAssembler::JumpToExternalReference(const ExternalReference& ext) { | 2051 void MacroAssembler::JumpToExternalReference(const ExternalReference& ext) { |
| 2222 // Set the entry point and jump to the C entry runtime stub. | 2052 // Set the entry point and jump to the C entry runtime stub. |
| 2223 mov(ebx, Immediate(ext)); | 2053 mov(ebx, Immediate(ext)); |
| 2224 CEntryStub ces(isolate(), 1); | 2054 CEntryStub ces(isolate(), 1); |
| 2225 jmp(ces.GetCode(), RelocInfo::CODE_TARGET); | 2055 jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
| 2226 } | 2056 } |
| 2227 | 2057 |
| 2228 | 2058 |
| 2229 void MacroAssembler::InvokePrologue(const ParameterCount& expected, | 2059 void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
| 2230 const ParameterCount& actual, | 2060 const ParameterCount& actual, |
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| 3372 if (mag.shift > 0) sar(edx, mag.shift); | 3202 if (mag.shift > 0) sar(edx, mag.shift); |
| 3373 mov(eax, dividend); | 3203 mov(eax, dividend); |
| 3374 shr(eax, 31); | 3204 shr(eax, 31); |
| 3375 add(edx, eax); | 3205 add(edx, eax); |
| 3376 } | 3206 } |
| 3377 | 3207 |
| 3378 | 3208 |
| 3379 } } // namespace v8::internal | 3209 } } // namespace v8::internal |
| 3380 | 3210 |
| 3381 #endif // V8_TARGET_ARCH_X87 | 3211 #endif // V8_TARGET_ARCH_X87 |
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