diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
index 810398ddc..bed673e92 100644
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
@@ -117,8 +117,8 @@
                 0x1: decode OPCODE_OP_BOTTOM3 {
                     0x0: movupd_Vo_Wo();
                     0x1: movupd_Wo_Vo();
-                    0x2: movlpd_Vq_Mq();
-                    0x3: movlpd_Mq_Vq();
+                    0x2: Inst::MOVLPD(Vq,Mq);
+                    0x3: Inst::MOVLPD(Mq,Vq);
                     0x4: unpcklpd_Vo_Wq();
                     0x5: unpckhpd_Vo_Wo();
                     0x6: movhpd_Vq_Mq();
diff --git a/src/arch/x86/isa/insts/__init__.py b/src/arch/x86/isa/insts/__init__.py
index f5c4e3113..e261a00db 100644
--- a/src/arch/x86/isa/insts/__init__.py
+++ b/src/arch/x86/isa/insts/__init__.py
@@ -68,6 +68,7 @@ categories = ["arithmetic",
               "processor_information",
               "rotate_and_shift",
               "semaphores",
+              "sse",
               "string",
               "system_calls",
               "system"]
diff --git a/src/arch/x86/isa/insts/sse/move.py b/src/arch/x86/isa/insts/sse/move.py
new file mode 100644
index 000000000..fb38a78aa
--- /dev/null
+++ b/src/arch/x86/isa/insts/sse/move.py
@@ -0,0 +1,78 @@
+# Copyright (c) 2007 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use of this software in source and binary forms,
+# with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# The software must be used only for Non-Commercial Use which means any
+# use which is NOT directed to receiving any direct monetary
+# compensation for, or commercial advantage from such use.  Illustrative
+# examples of non-commercial use are academic research, personal study,
+# teaching, education and corporate research & development.
+# Illustrative examples of commercial use are distributing products for
+# commercial advantage and providing services using the software for
+# commercial advantage.
+#
+# If you wish to use this software or functionality therein that may be
+# covered by patents for commercial use, please contact:
+#     Director of Intellectual Property Licensing
+#     Office of Strategy and Technology
+#     Hewlett-Packard Company
+#     1501 Page Mill Road
+#     Palo Alto, California  94304
+#
+# Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.  Redistributions
+# in binary form must reproduce the above copyright notice, this list of
+# conditions and the following disclaimer in the documentation and/or
+# other materials provided with the distribution.  Neither the name of
+# the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.  No right of
+# sublicense is granted herewith.  Derivatives of the software and
+# output created using the software may be prepared, but only for
+# Non-Commercial Uses.  Derivatives of the software may be shared with
+# others provided: (i) the others agree to abide by the list of
+# conditions herein which includes the Non-Commercial Use restrictions;
+# and (ii) such Derivatives of the software include the above copyright
+# notice to acknowledge the contribution from this software where
+# applicable, this list of conditions and the disclaimer below.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Gabe Black
+
+microcode = '''
+def macroop MOVLPD_R_M {
+    ldfp xmml, seg, sib, disp, dataSize=8
+};
+
+def macroop MOVLPD_R_P {
+    rdip t7
+    ldfp xmml, seg, riprel, disp, dataSize=8
+};
+
+def macroop MOVLPD_M_R {
+    stfp xmml, seg, sib, disp, dataSize=8
+};
+
+def macroop MOVLPD_P_R {
+    rdip t7
+    stfp xmml, seg, riprel, disp, dataSize=8
+};
+
+def macroop MOVLPD_R_R {
+    movfp xmml, xmml, xmmlm, dataSize=8
+};
+'''
diff --git a/src/arch/x86/isa/microasm.isa b/src/arch/x86/isa/microasm.isa
index 929fd0075..dcc20c708 100644
--- a/src/arch/x86/isa/microasm.isa
+++ b/src/arch/x86/isa/microasm.isa
@@ -81,7 +81,11 @@ let {{
     # Miscellaneous symbols
     symbols = {
         "reg" : "env.reg",
+        "xmml" : "FLOATREG_XMM_LOW(env.reg)",
+        "xmmh" : "FLOATREG_XMM_HIGH(env.reg)",
         "regm" : "env.regm",
+        "xmmlm" : "FLOATREG_XMM_LOW(env.regm)",
+        "xmmhm" : "FLOATREG_XMM_HIGH(env.regm)",
         "imm" : "IMMEDIATE",
         "disp" : "DISPLACEMENT",
         "seg" : "env.seg",