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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_IA32 | 7 #if V8_TARGET_ARCH_IA32 |
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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2077 | 2077 |
2078 void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, | 2078 void MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, |
2079 int num_arguments, | 2079 int num_arguments, |
2080 int result_size) { | 2080 int result_size) { |
2081 TailCallExternalReference(ExternalReference(fid, isolate()), | 2081 TailCallExternalReference(ExternalReference(fid, isolate()), |
2082 num_arguments, | 2082 num_arguments, |
2083 result_size); | 2083 result_size); |
2084 } | 2084 } |
2085 | 2085 |
2086 | 2086 |
2087 Operand ApiParameterOperand(int index) { | |
2088 return Operand(esp, index * kPointerSize); | |
2089 } | |
2090 | |
2091 | |
2092 void MacroAssembler::PrepareCallApiFunction(int argc) { | |
2093 EnterApiExitFrame(argc); | |
2094 if (emit_debug_code()) { | |
2095 mov(esi, Immediate(bit_cast<int32_t>(kZapValue))); | |
2096 } | |
2097 } | |
2098 | |
2099 | |
2100 void MacroAssembler::CallApiFunctionAndReturn( | |
2101 Register function_address, ExternalReference thunk_ref, | |
2102 Operand thunk_last_arg, int stack_space, Operand* stack_space_operand, | |
2103 Operand return_value_operand, Operand* context_restore_operand) { | |
2104 ExternalReference next_address = | |
2105 ExternalReference::handle_scope_next_address(isolate()); | |
2106 ExternalReference limit_address = | |
2107 ExternalReference::handle_scope_limit_address(isolate()); | |
2108 ExternalReference level_address = | |
2109 ExternalReference::handle_scope_level_address(isolate()); | |
2110 | |
2111 DCHECK(edx.is(function_address)); | |
2112 // Allocate HandleScope in callee-save registers. | |
2113 mov(ebx, Operand::StaticVariable(next_address)); | |
2114 mov(edi, Operand::StaticVariable(limit_address)); | |
2115 add(Operand::StaticVariable(level_address), Immediate(1)); | |
2116 | |
2117 if (FLAG_log_timer_events) { | |
2118 FrameScope frame(this, StackFrame::MANUAL); | |
2119 PushSafepointRegisters(); | |
2120 PrepareCallCFunction(1, eax); | |
2121 mov(Operand(esp, 0), | |
2122 Immediate(ExternalReference::isolate_address(isolate()))); | |
2123 CallCFunction(ExternalReference::log_enter_external_function(isolate()), 1); | |
2124 PopSafepointRegisters(); | |
2125 } | |
2126 | |
2127 | |
2128 Label profiler_disabled; | |
2129 Label end_profiler_check; | |
2130 mov(eax, Immediate(ExternalReference::is_profiling_address(isolate()))); | |
2131 cmpb(Operand(eax, 0), 0); | |
2132 j(zero, &profiler_disabled); | |
2133 | |
2134 // Additional parameter is the address of the actual getter function. | |
2135 mov(thunk_last_arg, function_address); | |
2136 // Call the api function. | |
2137 mov(eax, Immediate(thunk_ref)); | |
2138 call(eax); | |
2139 jmp(&end_profiler_check); | |
2140 | |
2141 bind(&profiler_disabled); | |
2142 // Call the api function. | |
2143 call(function_address); | |
2144 bind(&end_profiler_check); | |
2145 | |
2146 if (FLAG_log_timer_events) { | |
2147 FrameScope frame(this, StackFrame::MANUAL); | |
2148 PushSafepointRegisters(); | |
2149 PrepareCallCFunction(1, eax); | |
2150 mov(Operand(esp, 0), | |
2151 Immediate(ExternalReference::isolate_address(isolate()))); | |
2152 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); | |
2153 PopSafepointRegisters(); | |
2154 } | |
2155 | |
2156 Label prologue; | |
2157 // Load the value from ReturnValue | |
2158 mov(eax, return_value_operand); | |
2159 | |
2160 Label promote_scheduled_exception; | |
2161 Label exception_handled; | |
2162 Label delete_allocated_handles; | |
2163 Label leave_exit_frame; | |
2164 | |
2165 bind(&prologue); | |
2166 // No more valid handles (the result handle was the last one). Restore | |
2167 // previous handle scope. | |
2168 mov(Operand::StaticVariable(next_address), ebx); | |
2169 sub(Operand::StaticVariable(level_address), Immediate(1)); | |
2170 Assert(above_equal, kInvalidHandleScopeLevel); | |
2171 cmp(edi, Operand::StaticVariable(limit_address)); | |
2172 j(not_equal, &delete_allocated_handles); | |
2173 bind(&leave_exit_frame); | |
2174 | |
2175 // Check if the function scheduled an exception. | |
2176 ExternalReference scheduled_exception_address = | |
2177 ExternalReference::scheduled_exception_address(isolate()); | |
2178 cmp(Operand::StaticVariable(scheduled_exception_address), | |
2179 Immediate(isolate()->factory()->the_hole_value())); | |
2180 j(not_equal, &promote_scheduled_exception); | |
2181 bind(&exception_handled); | |
2182 | |
2183 #if DEBUG | |
2184 // Check if the function returned a valid JavaScript value. | |
2185 Label ok; | |
2186 Register return_value = eax; | |
2187 Register map = ecx; | |
2188 | |
2189 JumpIfSmi(return_value, &ok, Label::kNear); | |
2190 mov(map, FieldOperand(return_value, HeapObject::kMapOffset)); | |
2191 | |
2192 CmpInstanceType(map, LAST_NAME_TYPE); | |
2193 j(below_equal, &ok, Label::kNear); | |
2194 | |
2195 CmpInstanceType(map, FIRST_SPEC_OBJECT_TYPE); | |
2196 j(above_equal, &ok, Label::kNear); | |
2197 | |
2198 cmp(map, isolate()->factory()->heap_number_map()); | |
2199 j(equal, &ok, Label::kNear); | |
2200 | |
2201 cmp(return_value, isolate()->factory()->undefined_value()); | |
2202 j(equal, &ok, Label::kNear); | |
2203 | |
2204 cmp(return_value, isolate()->factory()->true_value()); | |
2205 j(equal, &ok, Label::kNear); | |
2206 | |
2207 cmp(return_value, isolate()->factory()->false_value()); | |
2208 j(equal, &ok, Label::kNear); | |
2209 | |
2210 cmp(return_value, isolate()->factory()->null_value()); | |
2211 j(equal, &ok, Label::kNear); | |
2212 | |
2213 Abort(kAPICallReturnedInvalidObject); | |
2214 | |
2215 bind(&ok); | |
2216 #endif | |
2217 | |
2218 bool restore_context = context_restore_operand != NULL; | |
2219 if (restore_context) { | |
2220 mov(esi, *context_restore_operand); | |
2221 } | |
2222 if (stack_space_operand != nullptr) { | |
2223 mov(ebx, *stack_space_operand); | |
2224 } | |
2225 LeaveApiExitFrame(!restore_context); | |
2226 if (stack_space_operand != nullptr) { | |
2227 DCHECK_EQ(0, stack_space); | |
2228 pop(ecx); | |
2229 add(esp, ebx); | |
2230 jmp(ecx); | |
2231 } else { | |
2232 ret(stack_space * kPointerSize); | |
2233 } | |
2234 | |
2235 bind(&promote_scheduled_exception); | |
2236 { | |
2237 FrameScope frame(this, StackFrame::INTERNAL); | |
2238 CallRuntime(Runtime::kPromoteScheduledException, 0); | |
2239 } | |
2240 jmp(&exception_handled); | |
2241 | |
2242 // HandleScope limit has changed. Delete allocated extensions. | |
2243 ExternalReference delete_extensions = | |
2244 ExternalReference::delete_handle_scope_extensions(isolate()); | |
2245 bind(&delete_allocated_handles); | |
2246 mov(Operand::StaticVariable(limit_address), edi); | |
2247 mov(edi, eax); | |
2248 mov(Operand(esp, 0), | |
2249 Immediate(ExternalReference::isolate_address(isolate()))); | |
2250 mov(eax, Immediate(delete_extensions)); | |
2251 call(eax); | |
2252 mov(eax, edi); | |
2253 jmp(&leave_exit_frame); | |
2254 } | |
2255 | |
2256 | |
2257 void MacroAssembler::JumpToExternalReference(const ExternalReference& ext) { | 2087 void MacroAssembler::JumpToExternalReference(const ExternalReference& ext) { |
2258 // Set the entry point and jump to the C entry runtime stub. | 2088 // Set the entry point and jump to the C entry runtime stub. |
2259 mov(ebx, Immediate(ext)); | 2089 mov(ebx, Immediate(ext)); |
2260 CEntryStub ces(isolate(), 1); | 2090 CEntryStub ces(isolate(), 1); |
2261 jmp(ces.GetCode(), RelocInfo::CODE_TARGET); | 2091 jmp(ces.GetCode(), RelocInfo::CODE_TARGET); |
2262 } | 2092 } |
2263 | 2093 |
2264 | 2094 |
2265 void MacroAssembler::InvokePrologue(const ParameterCount& expected, | 2095 void MacroAssembler::InvokePrologue(const ParameterCount& expected, |
2266 const ParameterCount& actual, | 2096 const ParameterCount& actual, |
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3457 if (mag.shift > 0) sar(edx, mag.shift); | 3287 if (mag.shift > 0) sar(edx, mag.shift); |
3458 mov(eax, dividend); | 3288 mov(eax, dividend); |
3459 shr(eax, 31); | 3289 shr(eax, 31); |
3460 add(edx, eax); | 3290 add(edx, eax); |
3461 } | 3291 } |
3462 | 3292 |
3463 | 3293 |
3464 } } // namespace v8::internal | 3294 } } // namespace v8::internal |
3465 | 3295 |
3466 #endif // V8_TARGET_ARCH_IA32 | 3296 #endif // V8_TARGET_ARCH_IA32 |
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