From 1f1be9fa21b56516fd39b628bc25b19c5dce127a Mon Sep 17 00:00:00 2001
From: flobernd <flobernd@users.noreply.github.com>
Date: Sat, 27 Jan 2018 17:48:20 +0100
Subject: [PATCH] Fixed non 64-bit mode mask-register error condition

---
 src/Decoder.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Decoder.c b/src/Decoder.c
index ea41ddc..6dfc8f4 100644
--- a/src/Decoder.c
+++ b/src/Decoder.c
@@ -4297,7 +4297,8 @@ static ZydisStatus ZydisCheckErrorConditions(ZydisDecoderContext* context,
         }
         break;
     case ZYDIS_REG_CONSTRAINTS_MASK:
-        if (context->cache.v_vvvv > 7)
+        if ((context->decoder->machineMode == ZYDIS_MACHINE_MODE_LONG_64) && 
+            (context->cache.v_vvvv > 7))
         {
             return ZYDIS_STATUS_BAD_REGISTER;
         }