PPC: Handle large offsets in LoadPU/StorePU.

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index e519b599df07297d22ecc40531c550bfb835200d..0945f79dbdad648f7a8e711c5ee92d6712c58b1a 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -4208,11 +4208,7 @@ void MacroAssembler::LoadP(Register dst, const MemOperand& mem,
     /* cannot use d-form */
     DCHECK(!scratch.is(no_reg));
     mov(scratch, Operand(offset));
-#if V8_TARGET_ARCH_PPC64
-    ldx(dst, MemOperand(mem.ra(), scratch));
-#else
-    lwzx(dst, MemOperand(mem.ra(), scratch));
-#endif
+    LoadPX(dst, MemOperand(mem.ra(), scratch));
   } else {
 #if V8_TARGET_ARCH_PPC64
     int misaligned = (offset & 3);
@@ -4231,9 +4227,7 @@ void MacroAssembler::LoadP(Register dst, const MemOperand& mem,
   }
 }
 
-
-// Store a "pointer" sized value to the memory location
-void MacroAssembler::StoreP(Register src, const MemOperand& mem,
+void MacroAssembler::LoadPU(Register dst, const MemOperand& mem,
                             Register scratch) {
   int offset = mem.offset();
 
@@ -4241,11 +4235,26 @@ void MacroAssembler::StoreP(Register src, const MemOperand& mem,
     /* cannot use d-form */
     DCHECK(!scratch.is(no_reg));
     mov(scratch, Operand(offset));
+    LoadPUX(dst, MemOperand(mem.ra(), scratch));
+  } else {
 #if V8_TARGET_ARCH_PPC64
-    stdx(src, MemOperand(mem.ra(), scratch));
+    ldu(dst, mem);
 #else
-    stwx(src, MemOperand(mem.ra(), scratch));
+    lwzu(dst, mem);
 #endif
+  }
+}
+
+// Store a "pointer" sized value to the memory location
+void MacroAssembler::StoreP(Register src, const MemOperand& mem,
+                            Register scratch) {
+  int offset = mem.offset();
+
+  if (!is_int16(offset)) {
+    /* cannot use d-form */
+    DCHECK(!scratch.is(no_reg));
+    mov(scratch, Operand(offset));
+    StorePX(src, MemOperand(mem.ra(), scratch));
   } else {
 #if V8_TARGET_ARCH_PPC64
     int misaligned = (offset & 3);
@@ -4269,6 +4278,24 @@ void MacroAssembler::StoreP(Register src, const MemOperand& mem,
   }
 }
 
+void MacroAssembler::StorePU(Register src, const MemOperand& mem,
+                             Register scratch) {
+  int offset = mem.offset();
+
+  if (!is_int16(offset)) {
+    /* cannot use d-form */
+    DCHECK(!scratch.is(no_reg));
+    mov(scratch, Operand(offset));
+    StorePUX(src, MemOperand(mem.ra(), scratch));
+  } else {
+#if V8_TARGET_ARCH_PPC64
+    stdu(src, mem);
+#else
+    stwu(src, mem);
+#endif
+  }
+}
+
 void MacroAssembler::LoadWordArith(Register dst, const MemOperand& mem,
                                    Register scratch) {
   int offset = mem.offset();