MIPS64: Improve long branches utilizing code range.

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 00665e3ffdde2dcd3b0b6d16d2d3af4594aaf018..0f9ae29840ec732ad67924680789d4c410e55f24 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -142,7 +142,14 @@ const int kPointerSizeLog2 = 3;
 const intptr_t kIntptrSignBit = V8_INT64_C(0x8000000000000000);
 const uintptr_t kUintptrAllBitsSet = V8_UINT64_C(0xFFFFFFFFFFFFFFFF);
 const bool kRequiresCodeRange = true;
+#if V8_TARGET_ARCH_MIPS64
+// To use pseudo-relative jumps such as j/jal instructions which have 28-bit
+// encoded immediate, the addresses have to be in range of 256MB aligned
+// region. Used only for large object space.
+const size_t kMaximalCodeRangeSize = 256 * MB;
+#else
 const size_t kMaximalCodeRangeSize = 512 * MB;
+#endif
 #if V8_OS_WIN
 const size_t kMinimumCodeRangeSize = 4 * MB;
 const size_t kReservedCodeRangePages = 1;