Introduce x87 port

src/x87/deoptimizer-x87.cc

Index: src/x87/deoptimizer-x87.cc
diff --git a/src/ia32/deoptimizer-ia32.cc b/src/x87/deoptimizer-x87.cc
similarity index 90%
copy from src/ia32/deoptimizer-ia32.cc
copy to src/x87/deoptimizer-x87.cc
index 05b2ce8a74224275f904787080831d4520674b2a..fb0e8f268658f9ded13d52639da0448b35db9a1d 100644
--- a/src/ia32/deoptimizer-ia32.cc
+++ b/src/x87/deoptimizer-x87.cc
@@ -4,7 +4,7 @@
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_X87
 
 #include "codegen.h"
 #include "deoptimizer.h"
@@ -187,7 +187,7 @@ void Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) {
   }
   input_->SetRegister(esp.code(), reinterpret_cast<intptr_t>(frame->sp()));
   input_->SetRegister(ebp.code(), reinterpret_cast<intptr_t>(frame->fp()));
-  for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; i++) {
+  for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     input_->SetDoubleRegister(i, 0.0);
   }
 
@@ -209,10 +209,8 @@ void Deoptimizer::SetPlatformCompiledStubRegisters(
 
 
 void Deoptimizer::CopyDoubleRegisters(FrameDescription* output_frame) {
-  for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) {
-    double double_value = input_->GetDoubleRegister(i);
-    output_frame->SetDoubleRegister(i, double_value);
-  }
+  // Do nothing for X87.
+  return;
 }
 
 
@@ -237,20 +235,9 @@ void Deoptimizer::EntryGenerator::Generate() {
 
   // Save all general purpose registers before messing with them.
   const int kNumberOfRegisters = Register::kNumRegisters;
-
-  const int kDoubleRegsSize = kDoubleSize *
-                              XMMRegister::kMaxNumAllocatableRegisters;
-  __ sub(esp, Immediate(kDoubleRegsSize));
-  for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) {
-    XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i);
-    int offset = i * kDoubleSize;
-    __ movsd(Operand(esp, offset), xmm_reg);
-  }
-
   __ pushad();
 
-  const int kSavedRegistersAreaSize = kNumberOfRegisters * kPointerSize +
-                                      kDoubleRegsSize;
+  const int kSavedRegistersAreaSize = kNumberOfRegisters * kPointerSize;
 
   // Get the bailout id from the stack.
   __ mov(ebx, Operand(esp, kSavedRegistersAreaSize));
@@ -288,22 +275,13 @@ void Deoptimizer::EntryGenerator::Generate() {
     __ pop(Operand(ebx, offset));
   }
 
-  int double_regs_offset = FrameDescription::double_registers_offset();
-  // Fill in the double input registers.
-  for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) {
-    int dst_offset = i * kDoubleSize + double_regs_offset;
-    int src_offset = i * kDoubleSize;
-    __ movsd(xmm0, Operand(esp, src_offset));
-    __ movsd(Operand(ebx, dst_offset), xmm0);
-  }
-
   // Clear FPU all exceptions.
   // TODO(ulan): Find out why the TOP register is not zero here in some cases,
   // and check that the generated code never deoptimizes with unbalanced stack.
   __ fnclex();
 
   // Remove the bailout id, return address and the double registers.
-  __ add(esp, Immediate(kDoubleRegsSize + 2 * kPointerSize));
+  __ add(esp, Immediate(2 * kPointerSize));
 
   // Compute a pointer to the unwinding limit in register ecx; that is
   // the first stack slot not part of the input frame.
@@ -372,13 +350,6 @@ void Deoptimizer::EntryGenerator::Generate() {
   __ cmp(eax, edx);
   __ j(below, &outer_push_loop);
 
-  // In case of a failed STUB, we have to restore the XMM registers.
-  for (int i = 0; i < XMMRegister::kMaxNumAllocatableRegisters; ++i) {
-    XMMRegister xmm_reg = XMMRegister::FromAllocationIndex(i);
-    int src_offset = i * kDoubleSize + double_regs_offset;
-    __ movsd(xmm_reg, Operand(ebx, src_offset));
-  }
-
   // Push state, pc, and continuation from the last output frame.
   __ push(Operand(ebx, FrameDescription::state_offset()));
   __ push(Operand(ebx, FrameDescription::pc_offset()));
@@ -434,4 +405,4 @@ void FrameDescription::SetCallerConstantPool(unsigned offset, intptr_t value) {
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_TARGET_ARCH_X87