MIPS64: Fix bug in super assignment from r24570.

src/mips64/full-codegen-mips64.cc

Index: src/mips64/full-codegen-mips64.cc
diff --git a/src/mips64/full-codegen-mips64.cc b/src/mips64/full-codegen-mips64.cc
index 959edc0d5490306d1ed0ea501117024a05ef731b..8aec4fc6ea27556f6c8018753f6c824e94482151 100644
--- a/src/mips64/full-codegen-mips64.cc
+++ b/src/mips64/full-codegen-mips64.cc
@@ -2520,10 +2520,10 @@ void FullCodeGenerator::EmitAssignment(Expression* expr) {
       Register scratch = a2;
       Register scratch2 = a3;
       __ mov(scratch, result_register());             // home_object
-      __ lw(v0, MemOperand(sp, kPointerSize));        // value
-      __ lw(scratch2, MemOperand(sp, 0));             // this
-      __ sw(scratch2, MemOperand(sp, kPointerSize));  // this
-      __ sw(scratch, MemOperand(sp, 0));              // home_object
+      __ ld(v0, MemOperand(sp, kPointerSize));        // value
+      __ ld(scratch2, MemOperand(sp, 0));             // this
+      __ sd(scratch2, MemOperand(sp, kPointerSize));  // this
+      __ sd(scratch, MemOperand(sp, 0));              // home_object
       // stack: this, home_object; v0: value
       EmitNamedSuperPropertyStore(prop);
       break;
@@ -2536,13 +2536,13 @@ void FullCodeGenerator::EmitAssignment(Expression* expr) {
       VisitForAccumulatorValue(prop->key());
       Register scratch = a2;
       Register scratch2 = a3;
-      __ lw(scratch2, MemOperand(sp, 2 * kPointerSize));  // value
+      __ ld(scratch2, MemOperand(sp, 2 * kPointerSize));  // value
       // stack: value, this, home_object; v0: key, a3: value
-      __ lw(scratch, MemOperand(sp, kPointerSize));  // this
-      __ sw(scratch, MemOperand(sp, 2 * kPointerSize));
-      __ lw(scratch, MemOperand(sp, 0));  // home_object
-      __ sw(scratch, MemOperand(sp, kPointerSize));
-      __ sw(v0, MemOperand(sp, 0));
+      __ ld(scratch, MemOperand(sp, kPointerSize));  // this
+      __ sd(scratch, MemOperand(sp, 2 * kPointerSize));
+      __ ld(scratch, MemOperand(sp, 0));  // home_object
+      __ sd(scratch, MemOperand(sp, kPointerSize));
+      __ sd(v0, MemOperand(sp, 0));
       __ Move(v0, scratch2);
       // stack: this, home_object, key; v0: value.
       EmitKeyedSuperPropertyStore(prop);