From d8d1662bc0469901a25658679e07082aa4d71d22 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Fri, 5 Jun 2026 08:35:17 +0000
Subject: 64-bit: vex-prefix register extension..

---
 CHANGELOG | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'CHANGELOG')

diff --git a/CHANGELOG b/CHANGELOG
index 9494d72..b60363b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -23,6 +23,9 @@
   `pmovsxwq`, and `cvtss2sd`. additionally, `lfs`, `lgs`, and `lss` in 64-bit
   mode have 32-bit operand forms (yielding 32 + 16 == 48 bits of memory
   accessed).
+* fix many vex instructions having their modrm/mmm registers extended by an
+  incorrect VEX prefix bit. most errors were REX.X being used to extend the mmm-field
+  register, but hardware uses REX.B for this purpose.
 
 ## 2.1.0
 
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