diff --git a/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/asm/amd64/AMD64Assembler.java b/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/asm/amd64/AMD64Assembler.java
index 5cc4f8934da..7026a4d1540 100644
--- a/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/asm/amd64/AMD64Assembler.java
+++ b/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/asm/amd64/AMD64Assembler.java
@@ -882,6 +882,7 @@ public static class SSEMROp extends AMD64MROp {
         // MOVSS and MOVSD are the same opcode, just with different operand size prefix
         public static final SSEMROp MOVSS = new SSEMROp("MOVSS",      P_0F, 0x11, PreferredNDS.SRC,  OpAssertion.SingleAssertion);
         public static final SSEMROp MOVSD = new SSEMROp("MOVSD",      P_0F, 0x11, PreferredNDS.SRC,  OpAssertion.DoubleAssertion);
+        public static final SSEMROp MOVUPD = new SSEMROp("MOVUPD", 0x66, P_0F, 0x11, PreferredNDS.NONE, OpAssertion.PackedDoubleAssertion);
         // @formatter:on
 
         private final PreferredNDS preferredNDS;
diff --git a/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java b/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java
index 0aa5ee458e7..18649e3a231 100644
--- a/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java
+++ b/compiler/src/jdk.internal.vm.compiler/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2009, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2009, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1326,6 +1327,9 @@ protected void emitStore(AMD64Kind kind, AMD64AddressValue address, AllocatableV
             case DOUBLE:
                 getLIRGen().append(new AMD64BinaryConsumer.MemoryMROp(SSEMROp.MOVSD, SD, address, value, state));
                 break;
+            case V128_DOUBLE:
+                getLIRGen().append(new AMD64BinaryConsumer.MemoryMROp(SSEMROp.MOVUPD, PD, address, value, state));
+                break;
             default:
                 throw GraalError.shouldNotReachHereUnexpectedValue(kind); // ExcludeFromJacocoGeneratedReport
         }