From 12a283b2d9d31636cd66956ea9584de4994858ff Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Wed, 7 Oct 2026 12:29:50 +0200
Subject: [PATCH] missing-x86: caution against directstore and movdir
 intrinsics

---
 crates/core_arch/missing-x86.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crates/core_arch/missing-x86.md b/crates/core_arch/missing-x86.md
index 637c8d4a86..836862964f 100644
--- a/crates/core_arch/missing-x86.md
+++ b/crates/core_arch/missing-x86.md
@@ -99,13 +99,16 @@
 <details><summary>["MOVDIR64B"]</summary><p>
 
   * [ ] [`_movdir64b`](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_movdir64b)
+    (note that this has AM-breaking semantics so adding it requires a lot of care, if it is possible at all)
 </p></details>
 
 
 <details><summary>["MOVDIRI"]</summary><p>
 
   * [ ] [`_directstoreu_u32`](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_directstoreu_u32)
+    (note that this has AM-breaking semantics so adding it requires a lot of care, if it is possible at all)
   * [ ] [`_directstoreu_u64`](https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_directstoreu_u64)
+    (note that this has AM-breaking semantics so adding it requires a lot of care, if it is possible at all)
 </p></details>