Introduce x87 port

src/x87/lithium-x87.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_IA32
+#if V8_TARGET_ARCH_X87
 
 #include "lithium-allocator-inl.h"
-#include "ia32/lithium-ia32.h"
-#include "ia32/lithium-codegen-ia32.h"
+#include "x87/lithium-x87.h"
+#include "x87/lithium-codegen-x87.h"
 #include "hydrogen-osr.h"
 
 namespace v8 {
 namespace internal {
 
 #define DEFINE_COMPILE(type)                            \
   void L##type::CompileToNative(LCodeGen* generator) {  \
     generator->Do##type(this);                          \
   }
 LITHIUM_CONCRETE_INSTRUCTION_LIST(DEFINE_COMPILE)
@@ skipping 31 matching lines @@
   for (int i = 0; i < InputCount(); i++) {
     LOperand* op = InputAt(i);
     if (op != NULL && op->IsDoubleRegister()) {
       return true;
     }
   }
   return false;
 }
 
 
+bool LInstruction::IsDoubleInput(X87Register reg, LCodeGen* cgen) {
+  for (int i = 0; i < InputCount(); i++) {
+    LOperand* op = InputAt(i);
+    if (op != NULL && op->IsDoubleRegister()) {
+      if (cgen->ToX87Register(op).is(reg)) return true;
+    }
+  }
+  return false;
+}
+
+
 void LInstruction::PrintTo(StringStream* stream) {
   stream->Add("%s ", this->Mnemonic());
 
   PrintOutputOperandTo(stream);
 
   PrintDataTo(stream);
 
   if (HasEnvironment()) {
     stream->Add(" ");
     environment()->PrintTo(stream);
@@ skipping 393 matching lines @@
   status_ = ABORTED;
 }
 
 
 LUnallocated* LChunkBuilder::ToUnallocated(Register reg) {
   return new(zone()) LUnallocated(LUnallocated::FIXED_REGISTER,
                                   Register::ToAllocationIndex(reg));
 }
 
 
-LUnallocated* LChunkBuilder::ToUnallocated(XMMRegister reg) {
-  return new(zone()) LUnallocated(LUnallocated::FIXED_DOUBLE_REGISTER,
-                                  XMMRegister::ToAllocationIndex(reg));
-}
-
-
 LOperand* LChunkBuilder::UseFixed(HValue* value, Register fixed_register) {
   return Use(value, ToUnallocated(fixed_register));
 }
 
 
-LOperand* LChunkBuilder::UseFixedDouble(HValue* value, XMMRegister reg) {
-  return Use(value, ToUnallocated(reg));
-}
-
-
 LOperand* LChunkBuilder::UseRegister(HValue* value) {
   return Use(value, new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER));
 }
 
 
 LOperand* LChunkBuilder::UseRegisterAtStart(HValue* value) {
   return Use(value,
              new(zone()) LUnallocated(LUnallocated::MUST_HAVE_REGISTER,
                                       LUnallocated::USED_AT_START));
 }
@@ skipping 107 matching lines @@
                 new(zone()) LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
 }
 
 
 LInstruction* LChunkBuilder::DefineFixed(LTemplateResultInstruction<1>* instr,
                                          Register reg) {
   return Define(instr, ToUnallocated(reg));
 }
 
 
-LInstruction* LChunkBuilder::DefineFixedDouble(
-    LTemplateResultInstruction<1>* instr,
-    XMMRegister reg) {
-  return Define(instr, ToUnallocated(reg));
-}
-
-
 LInstruction* LChunkBuilder::AssignEnvironment(LInstruction* instr) {
   HEnvironment* hydrogen_env = current_block_->last_environment();
   int argument_index_accumulator = 0;
   ZoneList<HValue*> objects_to_materialize(0, zone());
   instr->set_environment(CreateEnvironment(hydrogen_env,
                                            &argument_index_accumulator,
                                            &objects_to_materialize));
   return instr;
 }
 
@@ skipping 46 matching lines @@
 }
 
 
 LOperand* LChunkBuilder::FixedTemp(Register reg) {
   LUnallocated* operand = ToUnallocated(reg);
   ASSERT(operand->HasFixedPolicy());
   return operand;
 }
 
 
-LOperand* LChunkBuilder::FixedTemp(XMMRegister reg) {
-  LUnallocated* operand = ToUnallocated(reg);
-  ASSERT(operand->HasFixedPolicy());
-  return operand;
-}
-
-
 LInstruction* LChunkBuilder::DoBlockEntry(HBlockEntry* instr) {
   return new(zone()) LLabel(instr->block());
 }
 
 
 LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
   return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
 }
 
 
@@ skipping 222 matching lines @@
     ASSERT(fixed == 0 || used_at_start == 0);
   }
 #endif
 
   if (FLAG_stress_pointer_maps && !instr->HasPointerMap()) {
     instr = AssignPointerMap(instr);
   }
   if (FLAG_stress_environments && !instr->HasEnvironment()) {
     instr = AssignEnvironment(instr);
   }
+  if (instr->IsGoto() && LGoto::cast(instr)->jumps_to_join()) {
+    // TODO(olivf) Since phis of spilled values are joined as registers
+    // (not in the stack slot), we need to allow the goto gaps to keep one
+    // x87 register alive. To ensure all other values are still spilled, we
+    // insert a fpu register barrier right before.
+    LClobberDoubles* clobber = new(zone()) LClobberDoubles(isolate());
+    clobber->set_hydrogen_value(hydrogen_val);
+    chunk_->AddInstruction(clobber, current_block_);
+  }
   chunk_->AddInstruction(instr, current_block_);
 
   if (instr->IsCall()) {
     HValue* hydrogen_value_for_lazy_bailout = hydrogen_val;
     LInstruction* instruction_needing_environment = NULL;
     if (hydrogen_val->HasObservableSideEffects()) {
       HSimulate* sim = HSimulate::cast(hydrogen_val->next());
       instruction_needing_environment = instr;
       sim->ReplayEnvironment(current_block_->last_environment());
       hydrogen_value_for_lazy_bailout = sim;
@@ skipping 215 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoMathFloor(HUnaryMathOperation* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
   LMathFloor* result = new(zone()) LMathFloor(input);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 LInstruction* LChunkBuilder::DoMathRound(HUnaryMathOperation* instr) {
-  LOperand* input = UseRegister(instr->value());
-  LOperand* temp = FixedTemp(xmm4);
-  LMathRound* result = new(zone()) LMathRound(input, temp);
-  return AssignEnvironment(DefineAsRegister(result));
+  // Crankshaft is turned off for nosse2.
+  UNREACHABLE();
+  return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoMathAbs(HUnaryMathOperation* instr) {
   LOperand* context = UseAny(instr->context());  // Deferred use.
   LOperand* input = UseRegisterAtStart(instr->value());
   LInstruction* result =
       DefineSameAsFirst(new(zone()) LMathAbs(context, input));
   Representation r = instr->value()->representation();
   if (!r.IsDouble() && !r.IsSmiOrInteger32()) result = AssignPointerMap(result);
@@ skipping 420 matching lines @@
     ASSERT(instr->right()->representation().IsDouble());
     left = UseRegisterAtStart(instr->left());
     right = UseRegisterAtStart(instr->right());
   }
   LMathMinMax* minmax = new(zone()) LMathMinMax(left, right);
   return DefineSameAsFirst(minmax);
 }
 
 
 LInstruction* LChunkBuilder::DoPower(HPower* instr) {
-  ASSERT(instr->representation().IsDouble());
-  // We call a C function for double power. It can't trigger a GC.
-  // We need to use fixed result register for the call.
-  Representation exponent_type = instr->right()->representation();
-  ASSERT(instr->left()->representation().IsDouble());
-  LOperand* left = UseFixedDouble(instr->left(), xmm2);
-  LOperand* right = exponent_type.IsDouble() ?
-      UseFixedDouble(instr->right(), xmm1) :
-      UseFixed(instr->right(), eax);
-  LPower* result = new(zone()) LPower(left, right);
-  return MarkAsCall(DefineFixedDouble(result, xmm3), instr,
-                    CAN_DEOPTIMIZE_EAGERLY);
+  // Crankshaft is turned off for nosse2.
+  UNREACHABLE();
+  return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
   ASSERT(instr->left()->representation().IsSmiOrTagged());
   ASSERT(instr->right()->representation().IsSmiOrTagged());
   LOperand* context = UseFixed(instr->context(), esi);
   LOperand* left = UseFixed(instr->left(), edx);
   LOperand* right = UseFixed(instr->right(), eax);
   LCmpT* result = new(zone()) LCmpT(context, left, right);
@@ skipping 258 matching lines @@
         return DefineSameAsFirst(new(zone()) LDummyUse(value));
       }
       return AssignEnvironment(DefineSameAsFirst(new(zone()) LCheckSmi(value)));
     } else {
       ASSERT(to.IsInteger32());
       if (val->type().IsSmi() || val->representation().IsSmi()) {
         LOperand* value = UseRegister(val);
         return DefineSameAsFirst(new(zone()) LSmiUntag(value, false));
       } else {
         LOperand* value = UseRegister(val);
-        bool truncating = instr->CanTruncateToInt32();
-        LOperand* xmm_temp = !truncating ? FixedTemp(xmm1) : NULL;
-        LInstruction* result =
-            DefineSameAsFirst(new(zone()) LTaggedToI(value, xmm_temp));
+        LInstruction* result = DefineSameAsFirst(new(zone()) LTaggedToI(value));
         if (!val->representation().IsSmi()) result = AssignEnvironment(result);
         return result;
       }
     }
   } else if (from.IsDouble()) {
     if (to.IsTagged()) {
       info()->MarkAsDeferredCalling();
       LOperand* value = UseRegisterAtStart(val);
       LOperand* temp = FLAG_inline_new ? TempRegister() : NULL;
       LUnallocated* result_temp = TempRegister();
       LNumberTagD* result = new(zone()) LNumberTagD(value, temp);
       return AssignPointerMap(Define(result, result_temp));
     } else if (to.IsSmi()) {
       LOperand* value = UseRegister(val);
       return AssignEnvironment(
           DefineAsRegister(new(zone()) LDoubleToSmi(value)));
     } else {
       ASSERT(to.IsInteger32());
       bool truncating = instr->CanTruncateToInt32();
-      bool needs_temp = !truncating;
-      LOperand* value = needs_temp ? UseTempRegister(val) : UseRegister(val);
-      LOperand* temp = needs_temp ? TempRegister() : NULL;
-      LInstruction* result =
-          DefineAsRegister(new(zone()) LDoubleToI(value, temp));
+      LOperand* value = UseRegister(val);
+      LInstruction* result = DefineAsRegister(new(zone()) LDoubleToI(value));
       if (!truncating) result = AssignEnvironment(result);
       return result;
     }
   } else if (from.IsInteger32()) {
     info()->MarkAsDeferredCalling();
     if (to.IsTagged()) {
       if (!instr->CheckFlag(HValue::kCanOverflow)) {
         LOperand* value = UseRegister(val);
         return DefineSameAsFirst(new(zone()) LSmiTag(value));
       } else if (val->CheckFlag(HInstruction::kUint32)) {
         LOperand* value = UseRegister(val);
-        LOperand* temp1 = TempRegister();
-        LOperand* temp2 = FixedTemp(xmm1);
-        LNumberTagU* result = new(zone()) LNumberTagU(value, temp1, temp2);
+        LOperand* temp = TempRegister();
+        LNumberTagU* result = new(zone()) LNumberTagU(value, temp);
         return AssignPointerMap(DefineSameAsFirst(result));
       } else {
         LOperand* value = UseRegister(val);
         LOperand* temp = TempRegister();
         LNumberTagI* result = new(zone()) LNumberTagI(value, temp);
         return AssignPointerMap(DefineSameAsFirst(result));
       }
     } else if (to.IsSmi()) {
       LOperand* value = UseRegister(val);
       LInstruction* result = DefineSameAsFirst(new(zone()) LSmiTag(value));
       if (instr->CheckFlag(HValue::kCanOverflow)) {
         result = AssignEnvironment(result);
       }
       return result;
     } else {
       ASSERT(to.IsDouble());
       if (val->CheckFlag(HInstruction::kUint32)) {
-        LOperand* temp = FixedTemp(xmm1);
-        return DefineAsRegister(
-            new(zone()) LUint32ToDouble(UseRegister(val), temp));
+        return DefineAsRegister(new(zone()) LUint32ToDouble(UseRegister(val)));
       } else {
         return DefineAsRegister(new(zone()) LInteger32ToDouble(Use(val)));
       }
     }
   }
   UNREACHABLE();
   return NULL;
 }
 
 
@@ skipping 39 matching lines @@
     result = AssignPointerMap(result);
   }
   return result;
 }
 
 
 LInstruction* LChunkBuilder::DoClampToUint8(HClampToUint8* instr) {
   HValue* value = instr->value();
   Representation input_rep = value->representation();
   if (input_rep.IsDouble()) {
-    LOperand* reg = UseRegister(value);
-    return DefineFixed(new(zone()) LClampDToUint8(reg), eax);
+    UNREACHABLE();
+    return NULL;
   } else if (input_rep.IsInteger32()) {
     LOperand* reg = UseFixed(value, eax);
     return DefineFixed(new(zone()) LClampIToUint8(reg), eax);
   } else {
     ASSERT(input_rep.IsSmiOrTagged());
-    LOperand* reg = UseFixed(value, eax);
-    // Register allocator doesn't (yet) support allocation of double
-    // temps. Reserve xmm1 explicitly.
-    LOperand* temp = FixedTemp(xmm1);
-    LClampTToUint8* result = new(zone()) LClampTToUint8(reg, temp);
-    return AssignEnvironment(DefineFixed(result, eax));
+    LOperand* value = UseRegister(instr->value());
+    LClampTToUint8NoSSE2* res =
+        new(zone()) LClampTToUint8NoSSE2(value, TempRegister(),
+                                         TempRegister(), TempRegister());
+    return AssignEnvironment(DefineFixed(res, ecx));
   }
 }
 
 
 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
   HValue* value = instr->value();
   ASSERT(value->representation().IsDouble());
   return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
 }
 
@@ skipping 175 matching lines @@
       elements_kind == EXTERNAL_INT8_ELEMENTS ||
       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
       elements_kind == UINT8_ELEMENTS ||
       elements_kind == INT8_ELEMENTS ||
       elements_kind == UINT8_CLAMPED_ELEMENTS;
   if (val_is_fixed_register) {
     return UseFixed(instr->value(), eax);
   }
 
+  if (IsDoubleOrFloatElementsKind(elements_kind)) {
+    return UseRegisterAtStart(instr->value());
+  }
+
   return UseRegister(instr->value());
 }
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   if (!instr->is_typed_elements()) {
     ASSERT(instr->elements()->representation().IsTagged());
     ASSERT(instr->key()->representation().IsInteger32() ||
            instr->key()->representation().IsSmi());
 
@@ skipping 428 matching lines @@
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_TARGET_ARCH_IA32
+#endif  // V8_TARGET_ARCH_X87