diff --git a/readme.md b/readme.md
index 3b362d9..a615234 100644
--- a/readme.md
+++ b/readme.md
@@ -1,5 +1,5 @@
 
-Xbyak 4.82 ; JIT assembler for x86(IA32), x64(AMD64, x86-64) by C++
+Xbyak 4.83 ; JIT assembler for x86(IA32), x64(AMD64, x86-64) by C++
 =============
 
 Abstract
@@ -277,6 +277,7 @@
 
 History
 -------------
+* 2015/Jun/16 ver 4.83 support movbe(thanks to benvanik)
 * 2015/May/24 ver 4.82 support detection of F16C
 * 2015/Apr/25 ver 4.81 fix the condition to throw exception for setSize(thanks to whyisthisfieldhere)
 * 2015/Apr/22 ver 4.80 rip supports label(thanks to whyisthisfieldhere)
diff --git a/readme.txt b/readme.txt
index 82835fd..02f796a 100644
--- a/readme.txt
+++ b/readme.txt
@@ -1,5 +1,5 @@
 
-    C++用x86(IA-32), x64(AMD64, x86-64) JITアセンブラ Xbyak 4.82
+    C++用x86(IA-32), x64(AMD64, x86-64) JITアセンブラ Xbyak 4.83
 
 -----------------------------------------------------------------------------
 ◎概要
@@ -296,6 +296,7 @@
 -----------------------------------------------------------------------------
 ◎履歴
 
+2015/05/24 ver 4.83 mobveサポート(thanks to benvanik)
 2015/05/24 ver 4.82 F16Cが使えるかどうかの判定追加
 2015/04/25 ver 4.81 setSizeが例外を投げる条件を修正(thanks to whyisthisfieldhere)
 2015/04/22 ver 4.80 rip相対でLabelのサポート(thanks to whyisthisfieldhere)
diff --git a/sample/test_util.cpp b/sample/test_util.cpp
index 794dc8a..b6f4472 100644
--- a/sample/test_util.cpp
+++ b/sample/test_util.cpp
@@ -54,6 +54,7 @@
 		{ Cpu::tHLE, "hle" },
 		{ Cpu::tRTM, "rtm" },
 		{ Cpu::tF16C, "f16c" },
+		{ Cpu::tMOVBE, "movbe" },
 	};
 	for (size_t i = 0; i < NUM_OF_ARRAY(tbl); i++) {
 		if (cpu.has(tbl[i].type)) printf(" %s", tbl[i].str);
diff --git a/test/make_nm.cpp b/test/make_nm.cpp
index 57d08c2..a8989d2 100644
--- a/test/make_nm.cpp
+++ b/test/make_nm.cpp
@@ -973,6 +973,8 @@
 		put(p, REG32e|REG16|REG8|RAX|EAX|AX|AL, MEM|MEM_ONLY_DISP);
 		put(p, MEM32|MEM16|MEM8, IMM);
 		put(p, REG64, "0x1234567890abcdefLL", "0x1234567890abcdef");
+		put("movbe", REG16|REG32e, MEM);
+		put("movbe", MEM, REG16|REG32e);
 #ifdef XBYAK64
 		put(p, RAX|EAX|AX|AL, "ptr [0x1234567890abcdefLL]", "[qword 0x1234567890abcdef]");
 		put(p, "ptr [0x1234567890abcdefLL]", "[qword 0x1234567890abcdef]", RAX|EAX|AX|AL);
diff --git a/xbyak/xbyak.h b/xbyak/xbyak.h
index 008d6f0..417de14 100644
--- a/xbyak/xbyak.h
+++ b/xbyak/xbyak.h
@@ -96,7 +96,7 @@
 
 enum {
 	DEFAULT_MAX_CODE_SIZE = 4096,
-	VERSION = 0x4820 /* 0xABCD = A.BC(D) */
+	VERSION = 0x4830 /* 0xABCD = A.BC(D) */
 };
 
 #ifndef MIE_INTEGER_TYPE_DEFINED
@@ -1868,6 +1868,8 @@
 		mov_imm(reg, dummyAddr);
 		putL(label);
 	}
+	void movbe(const Reg& reg, const Address& addr) { opModM(addr, reg, 0x0F, 0x38, 0xF0); }
+	void movbe(const Address& addr, const Reg& reg) { opModM(addr, reg, 0x0F, 0x38, 0xF1); }
 	/*
 		put address of label to buffer
 		@note the put size is 4(32-bit), 8(64-bit)
diff --git a/xbyak/xbyak_mnemonic.h b/xbyak/xbyak_mnemonic.h
index 4763b46..43b18dd 100644
--- a/xbyak/xbyak_mnemonic.h
+++ b/xbyak/xbyak_mnemonic.h
@@ -1,4 +1,4 @@
-const char *getVersionString() const { return "4.82"; }
+const char *getVersionString() const { return "4.83"; }
 void packssdw(const Mmx& mmx, const Operand& op) { opMMX(mmx, op, 0x6B); }
 void packsswb(const Mmx& mmx, const Operand& op) { opMMX(mmx, op, 0x63); }
 void packuswb(const Mmx& mmx, const Operand& op) { opMMX(mmx, op, 0x67); }
diff --git a/xbyak/xbyak_util.h b/xbyak/xbyak_util.h
index 993252d..3a7c2c2 100644
--- a/xbyak/xbyak_util.h
+++ b/xbyak/xbyak_util.h
@@ -163,6 +163,7 @@
 	static const Type tHLE = uint64(1) << 31; // xacquire, xrelease, xtest
 	static const Type tRTM = uint64(1) << 32; // xbegin, xend, xabort
 	static const Type tF16C = uint64(1) << 33; // vcvtph2ps, vcvtps2ph
+	static const Type tMOVBE = uint64(1) << 34; // mobve
 
 	Cpu()
 		: type_(NONE)
@@ -192,6 +193,7 @@
 		if (data[2] & (1U << 9)) type_ |= tSSSE3;
 		if (data[2] & (1U << 19)) type_ |= tSSE41;
 		if (data[2] & (1U << 20)) type_ |= tSSE42;
+		if (data[2] & (1U << 22)) type_ |= tMOVBE;
 		if (data[2] & (1U << 23)) type_ |= tPOPCNT;
 		if (data[2] & (1U << 25)) type_ |= tAESNI;
 		if (data[2] & (1U << 1)) type_ |= tPCLMULQDQ;