From b5d19efd6fe6e9ffb284159a4a7e176d007da434 Mon Sep 17 00:00:00 2001
From: Javier Smooth <iamjaviersmooth@gmail.com>
Date: Mon, 27 Jul 2015 15:47:26 -0700
Subject: [PATCH 1/2] clean up portable 128-bit multiply

---
 src/common/int-util.h              | 12 ++++++++++++
 src/cryptonote_core/difficulty.cpp | 15 ---------------
 2 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/src/common/int-util.h b/src/common/int-util.h
index 6df00a8..0ca5ba6 100644
--- a/src/common/int-util.h
+++ b/src/common/int-util.h
@@ -68,6 +68,17 @@ static inline uint64_t lo_dword(uint64_t val) {
   return val & 0xFFFFFFFF;
 }
 
+#if defined(__GNUC__) && defined(__x86_64__)
+
+static inline uint64_t mul128(uint64_t a, uint64_t b, uint64_t *high) {
+  typedef unsigned __int128 uint128_t;
+  uint128_t res = (uint128_t) a * (uint128_t) b;
+  *high = (uint64_t) (res >> 64);
+  return (uint64_t) res;
+}
+
+#else
+
 static inline uint64_t mul128(uint64_t multiplier, uint64_t multiplicand, uint64_t* product_hi) {
   // multiplier   = ab = a * 2^32 + b
   // multiplicand = cd = c * 2^32 + d
@@ -93,6 +104,7 @@ static inline uint64_t mul128(uint64_t multiplier, uint64_t multiplicand, uint64
 
   return product_lo;
 }
+#endif
 
 static inline uint64_t div_with_reminder(uint64_t dividend, uint32_t divisor, uint32_t* remainder) {
   dividend |= ((uint64_t)*remainder) << 32;
diff --git a/src/cryptonote_core/difficulty.cpp b/src/cryptonote_core/difficulty.cpp
index 389112c..ddc7481 100644
--- a/src/cryptonote_core/difficulty.cpp
+++ b/src/cryptonote_core/difficulty.cpp
@@ -45,25 +45,10 @@ namespace cryptonote {
   using std::uint64_t;
   using std::vector;
 
-#if defined(_MSC_VER)
-#include <windows.h>
-#include <winnt.h>
-
   static inline void mul(uint64_t a, uint64_t b, uint64_t &low, uint64_t &high) {
     low = mul128(a, b, &high);
   }
 
-#else
-
-  static inline void mul(uint64_t a, uint64_t b, uint64_t &low, uint64_t &high) {
-    typedef unsigned __int128 uint128_t;
-    uint128_t res = (uint128_t) a * (uint128_t) b;
-    low = (uint64_t) res;
-    high = (uint64_t) (res >> 64);
-  }
-
-#endif
-
   static inline bool cadd(uint64_t a, uint64_t b) {
     return a + b < a;
   }

From bf65fe5b670fccd4357f1e849d9e6361b0aae0df Mon Sep 17 00:00:00 2001
From: Javier Smooth <iamjaviersmooth@gmail.com>
Date: Sat, 1 Aug 2015 02:24:27 -0700
Subject: [PATCH 2/2] remove unused data from in-mem blockchain (small mem
 savings)

---
 src/cryptonote_core/blockchain_storage.h                     | 2 +-
 src/cryptonote_core/blockchain_storage_boost_serialization.h | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/cryptonote_core/blockchain_storage.h b/src/cryptonote_core/blockchain_storage.h
index 08fc90e..a1656ae 100644
--- a/src/cryptonote_core/blockchain_storage.h
+++ b/src/cryptonote_core/blockchain_storage.h
@@ -38,6 +38,7 @@
 #include <boost/multi_index/member.hpp>
 #include <boost/foreach.hpp>
 #include <atomic>
+#include <cstddef>
 
 #include "syncobj.h"
 #include "string_tools.h"
@@ -65,7 +66,6 @@ namespace cryptonote
     {
       transaction tx;
       uint64_t m_keeper_block_height;
-      size_t m_blob_size;
       std::vector<uint64_t> m_global_output_indexes;
     };
 
diff --git a/src/cryptonote_core/blockchain_storage_boost_serialization.h b/src/cryptonote_core/blockchain_storage_boost_serialization.h
index 627367c..44e5fe5 100644
--- a/src/cryptonote_core/blockchain_storage_boost_serialization.h
+++ b/src/cryptonote_core/blockchain_storage_boost_serialization.h
@@ -29,6 +29,7 @@
 // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
 
 #pragma once 
+#include <cstddef>
 
 namespace boost
 {
@@ -41,7 +42,8 @@ namespace boost
     {
       ar & te.tx;
       ar & te.m_keeper_block_height;
-      ar & te.m_blob_size;
+      size_t dummy;
+      ar & dummy; // formerly te.m_blob_size;
       ar & te.m_global_output_indexes;
     }