Contribution of PowerPC port.

src/ppc/lithium-gap-resolver-ppc.cc

Index: src/ppc/lithium-gap-resolver-ppc.cc
diff --git a/src/mips/lithium-gap-resolver-mips.cc b/src/ppc/lithium-gap-resolver-ppc.cc
similarity index 72%
copy from src/mips/lithium-gap-resolver-mips.cc
copy to src/ppc/lithium-gap-resolver-ppc.cc
index 1bec0c8cda9c397e3bc85232d2a0a667b60cf423..fafc06139fa8fba9448fd009eb5cebb880175e3f 100644
--- a/src/mips/lithium-gap-resolver-mips.cc
+++ b/src/ppc/lithium-gap-resolver-ppc.cc
@@ -1,15 +1,20 @@
 // Copyright 2012 the V8 project authors. All rights reserved.
+//
+// Copyright IBM Corp. 2012, 2013. All rights reserved.
+//
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
-#include "src/mips/lithium-codegen-mips.h"
-#include "src/mips/lithium-gap-resolver-mips.h"
+#include "src/ppc/lithium-codegen-ppc.h"
+#include "src/ppc/lithium-gap-resolver-ppc.h"
 
 namespace v8 {
 namespace internal {
 
+static const Register kSavedValueRegister = {11};
+
 LGapResolver::LGapResolver(LCodeGen* owner)
     : cgen_(owner),
       moves_(32, owner->zone()),
@@ -145,13 +150,13 @@ void LGapResolver::BreakCycle(int index) {
   LOperand* source = moves_[index].source();
   saved_destination_ = moves_[index].destination();
   if (source->IsRegister()) {
-    __ mov(kLithiumScratchReg, cgen_->ToRegister(source));
+    __ mr(kSavedValueRegister, cgen_->ToRegister(source));
   } else if (source->IsStackSlot()) {
-    __ lw(kLithiumScratchReg, cgen_->ToMemOperand(source));
+    __ LoadP(kSavedValueRegister, cgen_->ToMemOperand(source));
   } else if (source->IsDoubleRegister()) {
-    __ mov_d(kLithiumScratchDouble, cgen_->ToDoubleRegister(source));
+    __ fmr(kScratchDoubleReg, cgen_->ToDoubleRegister(source));
   } else if (source->IsDoubleStackSlot()) {
-    __ ldc1(kLithiumScratchDouble, cgen_->ToMemOperand(source));
+    __ lfd(kScratchDoubleReg, cgen_->ToMemOperand(source));
   } else {
     UNREACHABLE();
   }
@@ -164,17 +169,15 @@ void LGapResolver::RestoreValue() {
   DCHECK(in_cycle_);
   DCHECK(saved_destination_ != NULL);
 
-  // Spilled value is in kLithiumScratchReg or kLithiumScratchDouble.
+  // Spilled value is in kSavedValueRegister or kSavedDoubleValueRegister.
   if (saved_destination_->IsRegister()) {
-    __ mov(cgen_->ToRegister(saved_destination_), kLithiumScratchReg);
+    __ mr(cgen_->ToRegister(saved_destination_), kSavedValueRegister);
   } else if (saved_destination_->IsStackSlot()) {
-    __ sw(kLithiumScratchReg, cgen_->ToMemOperand(saved_destination_));
+    __ StoreP(kSavedValueRegister, cgen_->ToMemOperand(saved_destination_));
   } else if (saved_destination_->IsDoubleRegister()) {
-    __ mov_d(cgen_->ToDoubleRegister(saved_destination_),
-            kLithiumScratchDouble);
+    __ fmr(cgen_->ToDoubleRegister(saved_destination_), kScratchDoubleReg);
   } else if (saved_destination_->IsDoubleStackSlot()) {
-    __ sdc1(kLithiumScratchDouble,
-            cgen_->ToMemOperand(saved_destination_));
+    __ stfd(kScratchDoubleReg, cgen_->ToMemOperand(saved_destination_));
   } else {
     UNREACHABLE();
   }
@@ -194,33 +197,24 @@ void LGapResolver::EmitMove(int index) {
   if (source->IsRegister()) {
     Register source_register = cgen_->ToRegister(source);
     if (destination->IsRegister()) {
-      __ mov(cgen_->ToRegister(destination), source_register);
+      __ mr(cgen_->ToRegister(destination), source_register);
     } else {
       DCHECK(destination->IsStackSlot());
-      __ sw(source_register, cgen_->ToMemOperand(destination));
+      __ StoreP(source_register, cgen_->ToMemOperand(destination));
     }
   } else if (source->IsStackSlot()) {
     MemOperand source_operand = cgen_->ToMemOperand(source);
     if (destination->IsRegister()) {
-      __ lw(cgen_->ToRegister(destination), source_operand);
+      __ LoadP(cgen_->ToRegister(destination), source_operand);
     } else {
       DCHECK(destination->IsStackSlot());
       MemOperand destination_operand = cgen_->ToMemOperand(destination);
       if (in_cycle_) {
-        if (!destination_operand.OffsetIsInt16Encodable()) {
-          // 'at' is overwritten while saving the value to the destination.
-          // Therefore we can't use 'at'.  It is OK if the read from the source
-          // destroys 'at', since that happens before the value is read.
-          // This uses only a single reg of the double reg-pair.
-          __ lwc1(kLithiumScratchDouble, source_operand);
-          __ swc1(kLithiumScratchDouble, destination_operand);
-        } else {
-          __ lw(at, source_operand);
-          __ sw(at, destination_operand);
-        }
+        __ LoadP(ip, source_operand);
+        __ StoreP(ip, destination_operand);
       } else {
-        __ lw(kLithiumScratchReg, source_operand);
-        __ sw(kLithiumScratchReg, destination_operand);
+        __ LoadP(kSavedValueRegister, source_operand);
+        __ StoreP(kSavedValueRegister, destination_operand);
       }
     }
 
@@ -228,62 +222,60 @@ void LGapResolver::EmitMove(int index) {
     LConstantOperand* constant_source = LConstantOperand::cast(source);
     if (destination->IsRegister()) {
       Register dst = cgen_->ToRegister(destination);
-      Representation r = cgen_->IsSmi(constant_source)
-          ? Representation::Smi() : Representation::Integer32();
       if (cgen_->IsInteger32(constant_source)) {
-        __ li(dst, Operand(cgen_->ToRepresentation(constant_source, r)));
+        cgen_->EmitLoadIntegerConstant(constant_source, dst);
       } else {
-        __ li(dst, cgen_->ToHandle(constant_source));
+        __ Move(dst, cgen_->ToHandle(constant_source));
       }
     } else if (destination->IsDoubleRegister()) {
       DoubleRegister result = cgen_->ToDoubleRegister(destination);
       double v = cgen_->ToDouble(constant_source);
-      __ Move(result, v);
+      __ LoadDoubleLiteral(result, v, ip);
     } else {
       DCHECK(destination->IsStackSlot());
       DCHECK(!in_cycle_);  // Constant moves happen after all cycles are gone.
-      Representation r = cgen_->IsSmi(constant_source)
-          ? Representation::Smi() : Representation::Integer32();
       if (cgen_->IsInteger32(constant_source)) {
-        __ li(kLithiumScratchReg,
-              Operand(cgen_->ToRepresentation(constant_source, r)));
+        cgen_->EmitLoadIntegerConstant(constant_source, kSavedValueRegister);
       } else {
-        __ li(kLithiumScratchReg, cgen_->ToHandle(constant_source));
+        __ Move(kSavedValueRegister, cgen_->ToHandle(constant_source));
       }
-      __ sw(kLithiumScratchReg, cgen_->ToMemOperand(destination));
+      __ StoreP(kSavedValueRegister, cgen_->ToMemOperand(destination));
     }
 
   } else if (source->IsDoubleRegister()) {
     DoubleRegister source_register = cgen_->ToDoubleRegister(source);
     if (destination->IsDoubleRegister()) {
-      __ mov_d(cgen_->ToDoubleRegister(destination), source_register);
+      __ fmr(cgen_->ToDoubleRegister(destination), source_register);
     } else {
       DCHECK(destination->IsDoubleStackSlot());
-      MemOperand destination_operand = cgen_->ToMemOperand(destination);
-      __ sdc1(source_register, destination_operand);
+      __ stfd(source_register, cgen_->ToMemOperand(destination));
     }
 
   } else if (source->IsDoubleStackSlot()) {
     MemOperand source_operand = cgen_->ToMemOperand(source);
     if (destination->IsDoubleRegister()) {
-      __ ldc1(cgen_->ToDoubleRegister(destination), source_operand);
+      __ lfd(cgen_->ToDoubleRegister(destination), source_operand);
     } else {
       DCHECK(destination->IsDoubleStackSlot());
       MemOperand destination_operand = cgen_->ToMemOperand(destination);
       if (in_cycle_) {
-        // kLithiumScratchDouble was used to break the cycle,
-        // but kLithiumScratchReg is free.
-        MemOperand source_high_operand =
-            cgen_->ToHighMemOperand(source);
+// kSavedDoubleValueRegister was used to break the cycle,
+// but kSavedValueRegister is free.
+#if V8_TARGET_ARCH_PPC64
+        __ ld(kSavedValueRegister, source_operand);
+        __ std(kSavedValueRegister, destination_operand);
+#else
+        MemOperand source_high_operand = cgen_->ToHighMemOperand(source);
         MemOperand destination_high_operand =
             cgen_->ToHighMemOperand(destination);
-        __ lw(kLithiumScratchReg, source_operand);
-        __ sw(kLithiumScratchReg, destination_operand);
-        __ lw(kLithiumScratchReg, source_high_operand);
-        __ sw(kLithiumScratchReg, destination_high_operand);
+        __ lwz(kSavedValueRegister, source_operand);
+        __ stw(kSavedValueRegister, destination_operand);
+        __ lwz(kSavedValueRegister, source_high_operand);
+        __ stw(kSavedValueRegister, destination_high_operand);
+#endif
       } else {
-        __ ldc1(kLithiumScratchDouble, source_operand);
-        __ sdc1(kLithiumScratchDouble, destination_operand);
+        __ lfd(kScratchDoubleReg, source_operand);
+        __ stfd(kScratchDoubleReg, destination_operand);
       }
     }
   } else {
@@ -295,5 +287,5 @@ void LGapResolver::EmitMove(int index) {
 
 
 #undef __
-
-} }  // namespace v8::internal
+}
+}  // namespace v8::internal