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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_X87 | 5 #if V8_TARGET_ARCH_X87 |
| 6 | 6 |
| 7 #include "src/base/bits.h" | 7 #include "src/base/bits.h" |
| 8 #include "src/base/division-by-constant.h" | 8 #include "src/base/division-by-constant.h" |
| 9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
| 10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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| 936 EnterExitFrameEpilogue(3, save_doubles); | 936 EnterExitFrameEpilogue(3, save_doubles); |
| 937 } | 937 } |
| 938 | 938 |
| 939 | 939 |
| 940 void MacroAssembler::EnterApiExitFrame(int argc) { | 940 void MacroAssembler::EnterApiExitFrame(int argc) { |
| 941 EnterExitFramePrologue(); | 941 EnterExitFramePrologue(); |
| 942 EnterExitFrameEpilogue(argc, false); | 942 EnterExitFrameEpilogue(argc, false); |
| 943 } | 943 } |
| 944 | 944 |
| 945 | 945 |
| 946 void MacroAssembler::LeaveExitFrame(bool save_doubles) { | 946 void MacroAssembler::LeaveExitFrame(bool save_doubles, bool pop_arguments) { |
| 947 // Optionally restore FPU state. | 947 // Optionally restore FPU state. |
| 948 if (save_doubles) { | 948 if (save_doubles) { |
| 949 const int offset = -2 * kPointerSize; | 949 const int offset = -2 * kPointerSize; |
| 950 frstor(MemOperand(ebp, offset - 108)); | 950 frstor(MemOperand(ebp, offset - 108)); |
| 951 } | 951 } |
| 952 | 952 |
| 953 // Get the return address from the stack and restore the frame pointer. | 953 if (pop_arguments) { |
| 954 mov(ecx, Operand(ebp, 1 * kPointerSize)); | 954 // Get the return address from the stack and restore the frame pointer. |
| 955 mov(ebp, Operand(ebp, 0 * kPointerSize)); | 955 mov(ecx, Operand(ebp, 1 * kPointerSize)); |
| 956 mov(ebp, Operand(ebp, 0 * kPointerSize)); |
| 956 | 957 |
| 957 // Pop the arguments and the receiver from the caller stack. | 958 // Pop the arguments and the receiver from the caller stack. |
| 958 lea(esp, Operand(esi, 1 * kPointerSize)); | 959 lea(esp, Operand(esi, 1 * kPointerSize)); |
| 959 | 960 |
| 960 // Push the return address to get ready to return. | 961 // Push the return address to get ready to return. |
| 961 push(ecx); | 962 push(ecx); |
| 963 } else { |
| 964 // Otherwise just leave the exit frame. |
| 965 leave(); |
| 966 } |
| 962 | 967 |
| 963 LeaveExitFrameEpilogue(true); | 968 LeaveExitFrameEpilogue(true); |
| 964 } | 969 } |
| 965 | 970 |
| 966 | 971 |
| 967 void MacroAssembler::LeaveExitFrameEpilogue(bool restore_context) { | 972 void MacroAssembler::LeaveExitFrameEpilogue(bool restore_context) { |
| 968 // Restore current context from top and clear it in debug mode. | 973 // Restore current context from top and clear it in debug mode. |
| 969 ExternalReference context_address(Isolate::kContextAddress, isolate()); | 974 ExternalReference context_address(Isolate::kContextAddress, isolate()); |
| 970 if (restore_context) { | 975 if (restore_context) { |
| 971 mov(esi, Operand::StaticVariable(context_address)); | 976 mov(esi, Operand::StaticVariable(context_address)); |
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| 2996 mov(eax, dividend); | 3001 mov(eax, dividend); |
| 2997 shr(eax, 31); | 3002 shr(eax, 31); |
| 2998 add(edx, eax); | 3003 add(edx, eax); |
| 2999 } | 3004 } |
| 3000 | 3005 |
| 3001 | 3006 |
| 3002 } // namespace internal | 3007 } // namespace internal |
| 3003 } // namespace v8 | 3008 } // namespace v8 |
| 3004 | 3009 |
| 3005 #endif // V8_TARGET_ARCH_X87 | 3010 #endif // V8_TARGET_ARCH_X87 |
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