diff --git a/basis/cpu/x86/assembler/assembler-tests.factor b/basis/cpu/x86/assembler/assembler-tests.factor
index 83694cae94..f0309c2e58 100644
--- a/basis/cpu/x86/assembler/assembler-tests.factor
+++ b/basis/cpu/x86/assembler/assembler-tests.factor
@@ -103,6 +103,15 @@ cell 4 = [
 [ [ EAX [] XMM1 UCOMISD ] { } make ] must-fail
 [ { HEX: 66 HEX: 0f HEX: 38 HEX: 2a HEX: 01 } ] [ [ XMM0 ECX [] MOVNTDQA ] { } make ] unit-test
 
+[ { HEX: 66 HEX: 48 HEX: 0f HEX: 6e HEX: c8 } ] [ [ XMM1 RAX MOVD ] { } make ] unit-test
+[ { HEX: 66 HEX: 0f HEX: 6e HEX: c8 } ] [ [ XMM1 EAX MOVD ] { } make ] unit-test
+[ { HEX: 66 HEX: 48 HEX: 0f HEX: 7e HEX: c8 } ] [ [ RAX XMM1 MOVD ] { } make ] unit-test
+[ { HEX: 66 HEX: 0f HEX: 7e HEX: c8 } ] [ [ EAX XMM1 MOVD ] { } make ] unit-test
+
+[ { HEX: f3 HEX: 0f HEX: 7e HEX: 08 } ] [ [ XMM1 EAX [] MOVQ ] { } make ] unit-test
+[ { HEX: f3 HEX: 0f HEX: 7e HEX: 08 } ] [ [ XMM1 EAX [] MOVQ ] { } make ] unit-test
+[ { HEX: f3 HEX: 0f HEX: 7e HEX: ca } ] [ [ XMM1 XMM2 MOVQ ] { } make ] unit-test
+
 ! rm-r only sse instructions
 [ { HEX: 0f HEX: 2b HEX: 08 } ] [ [ EAX [] XMM1 MOVNTPS ] { } make ] unit-test
 [ { HEX: 66 HEX: 0f HEX: e7 HEX: 08 } ] [ [ EAX [] XMM1 MOVNTDQ ] { } make ] unit-test
diff --git a/basis/cpu/x86/assembler/assembler.factor b/basis/cpu/x86/assembler/assembler.factor
index 401152325b..35613ac163 100644
--- a/basis/cpu/x86/assembler/assembler.factor
+++ b/basis/cpu/x86/assembler/assembler.factor
@@ -554,6 +554,9 @@ PRIVATE>
 : 2-operand-rm-mr-sse ( dst src op1{rm,mr} op2 -- )
     [ , ] when* direction-op-sse extended-opcode (2-operand) ;
 
+: 2-operand-rm-mr-sse* ( dst src op12{rm,mr} -- )
+    direction-op-sse first2 [ , ] when* extended-opcode (2-operand) ;
+
 : 2-operand-rm-sse ( dst src op1 op2 -- )
     [ , ] when* extended-opcode (2-operand) ;
 
@@ -771,6 +774,9 @@ ALIAS: PINSRQ PINSRD
 : MOVDQA     ( dest src -- ) { HEX: 6f HEX: 7f } HEX: 66 2-operand-rm-mr-sse ;
 : MOVDQU     ( dest src -- ) { HEX: 6f HEX: 7f } HEX: f3 2-operand-rm-mr-sse ;
 
+: MOVQ       ( dest src -- )
+    { { HEX: 7e HEX: f3 } { HEX: d6 HEX: 66 } } 2-operand-rm-mr-sse* ;
+
 <PRIVATE
 
 : 2shuffler ( indexes/mask -- mask )