diff --git a/src/core/cpu_patches.cpp b/src/core/cpu_patches.cpp
index 202cfbb85..3404496ce 100644
--- a/src/core/cpu_patches.cpp
+++ b/src/core/cpu_patches.cpp
@@ -1053,7 +1053,14 @@ static bool TryExecuteIllegalInstruction(void* ctx, void* code_address) {
             }
 
             u64 index = (lowQWordSrc >> 8) & 0x3F;
-            ASSERT_MSG(length + index <= 64, "length + index must be less than or equal to 64.");
+            if (length + index > 64) {
+                // Undefined behavior if length + index is bigger than 64 according to the spec,
+                // we'll warn and continue execution.
+                LOG_WARNING(Core,
+                            "extrq at {:x} with length {} and index {} is bigger than 64, "
+                            "undefined behavior",
+                            fmt::ptr(code_address), length, index);
+            }
 
             lowQWordDst >>= index;
             lowQWordDst &= mask;
@@ -1106,7 +1113,14 @@ static bool TryExecuteIllegalInstruction(void* ctx, void* code_address) {
             }
 
             u64 index = (highQWordSrc >> 8) & 0x3F;
-            ASSERT_MSG(length + index <= 64, "length + index must be less than or equal to 64.");
+            if (length + index > 64) {
+                // Undefined behavior if length + index is bigger than 64 according to the spec,
+                // we'll warn and continue execution.
+                LOG_WARNING(Core,
+                            "insertq at {:x} with length {} and index {} is bigger than 64, "
+                            "undefined behavior",
+                            fmt::ptr(code_address), length, index);
+            }
 
             lowQWordSrc &= mask;
             lowQWordDst &= ~(mask << index);