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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 #if V8_TARGET_ARCH_MIPS64 | 5 #if V8_TARGET_ARCH_MIPS64 |
6 | 6 |
7 #include "src/bootstrapper.h" | 7 #include "src/bootstrapper.h" |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/ic/handler-compiler.h" | 10 #include "src/ic/handler-compiler.h" |
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1057 } | 1057 } |
1058 | 1058 |
1059 | 1059 |
1060 void CEntryStub::Generate(MacroAssembler* masm) { | 1060 void CEntryStub::Generate(MacroAssembler* masm) { |
1061 // Called from JavaScript; parameters are on stack as if calling JS function | 1061 // Called from JavaScript; parameters are on stack as if calling JS function |
1062 // a0: number of arguments including receiver | 1062 // a0: number of arguments including receiver |
1063 // a1: pointer to builtin function | 1063 // a1: pointer to builtin function |
1064 // fp: frame pointer (restored after C call) | 1064 // fp: frame pointer (restored after C call) |
1065 // sp: stack pointer (restored as callee's sp after C call) | 1065 // sp: stack pointer (restored as callee's sp after C call) |
1066 // cp: current context (C callee-saved) | 1066 // cp: current context (C callee-saved) |
| 1067 // |
| 1068 // If argv_in_register(): |
| 1069 // a2: pointer to the first argument |
1067 | 1070 |
1068 ProfileEntryHookStub::MaybeCallEntryHook(masm); | 1071 ProfileEntryHookStub::MaybeCallEntryHook(masm); |
1069 | 1072 |
1070 // Compute the argv pointer in a callee-saved register. | 1073 if (argv_in_register()) { |
1071 __ dsll(s1, a0, kPointerSizeLog2); | 1074 // Move argv into the correct register. |
1072 __ Daddu(s1, sp, s1); | 1075 __ mov(s1, a2); |
1073 __ Dsubu(s1, s1, kPointerSize); | 1076 } else { |
| 1077 // Compute the argv pointer in a callee-saved register. |
| 1078 __ dsll(s1, a0, kPointerSizeLog2); |
| 1079 __ Daddu(s1, sp, s1); |
| 1080 __ Dsubu(s1, s1, kPointerSize); |
| 1081 } |
1074 | 1082 |
1075 // Enter the exit frame that transitions from JavaScript to C++. | 1083 // Enter the exit frame that transitions from JavaScript to C++. |
1076 FrameScope scope(masm, StackFrame::MANUAL); | 1084 FrameScope scope(masm, StackFrame::MANUAL); |
1077 __ EnterExitFrame(save_doubles()); | 1085 __ EnterExitFrame(save_doubles()); |
1078 | 1086 |
1079 // s0: number of arguments including receiver (C callee-saved) | 1087 // s0: number of arguments including receiver (C callee-saved) |
1080 // s1: pointer to first argument (C callee-saved) | 1088 // s1: pointer to first argument (C callee-saved) |
1081 // s2: pointer to builtin function (C callee-saved) | 1089 // s2: pointer to builtin function (C callee-saved) |
1082 | 1090 |
1083 // Prepare arguments for C routine. | 1091 // Prepare arguments for C routine. |
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1143 // Cannot use check here as it attempts to generate call into runtime. | 1151 // Cannot use check here as it attempts to generate call into runtime. |
1144 __ Branch(&okay, eq, a4, Operand(a2)); | 1152 __ Branch(&okay, eq, a4, Operand(a2)); |
1145 __ stop("Unexpected pending exception"); | 1153 __ stop("Unexpected pending exception"); |
1146 __ bind(&okay); | 1154 __ bind(&okay); |
1147 } | 1155 } |
1148 | 1156 |
1149 // Exit C frame and return. | 1157 // Exit C frame and return. |
1150 // v0:v1: result | 1158 // v0:v1: result |
1151 // sp: stack pointer | 1159 // sp: stack pointer |
1152 // fp: frame pointer | 1160 // fp: frame pointer |
1153 // s0: still holds argc (callee-saved). | 1161 Register argc; |
1154 __ LeaveExitFrame(save_doubles(), s0, true, EMIT_RETURN); | 1162 if (argv_in_register()) { |
| 1163 // We don't want to pop arguments so set argc to no_reg. |
| 1164 argc = no_reg; |
| 1165 } else { |
| 1166 // s0: still holds argc (callee-saved). |
| 1167 argc = s0; |
| 1168 } |
| 1169 __ LeaveExitFrame(save_doubles(), argc, true, EMIT_RETURN); |
1155 | 1170 |
1156 // Handling of exception. | 1171 // Handling of exception. |
1157 __ bind(&exception_returned); | 1172 __ bind(&exception_returned); |
1158 | 1173 |
1159 ExternalReference pending_handler_context_address( | 1174 ExternalReference pending_handler_context_address( |
1160 Isolate::kPendingHandlerContextAddress, isolate()); | 1175 Isolate::kPendingHandlerContextAddress, isolate()); |
1161 ExternalReference pending_handler_code_address( | 1176 ExternalReference pending_handler_code_address( |
1162 Isolate::kPendingHandlerCodeAddress, isolate()); | 1177 Isolate::kPendingHandlerCodeAddress, isolate()); |
1163 ExternalReference pending_handler_offset_address( | 1178 ExternalReference pending_handler_offset_address( |
1164 Isolate::kPendingHandlerOffsetAddress, isolate()); | 1179 Isolate::kPendingHandlerOffsetAddress, isolate()); |
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5760 MemOperand(fp, 6 * kPointerSize), NULL); | 5775 MemOperand(fp, 6 * kPointerSize), NULL); |
5761 } | 5776 } |
5762 | 5777 |
5763 | 5778 |
5764 #undef __ | 5779 #undef __ |
5765 | 5780 |
5766 } // namespace internal | 5781 } // namespace internal |
5767 } // namespace v8 | 5782 } // namespace v8 |
5768 | 5783 |
5769 #endif // V8_TARGET_ARCH_MIPS64 | 5784 #endif // V8_TARGET_ARCH_MIPS64 |
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