From de700cb43660699369e367b758af99bfc1d65583 Mon Sep 17 00:00:00 2001
From: As9xm <197338912+As9xm@users.noreply.github.com>
Date: Thu, 10 Sep 2026 04:07:07 +0300
Subject: [PATCH] Fix 16-bit disp16 precedence bug in getecommon16o

In C, == binds tighter than &, so 'm&7==6' parsed as 'm&(7==6)' = 'm&0' = always false. Disp16 was never fetched for mod==00,rm==110 16-bit addressing (GET_EW16_OFFS), leaving a wrong effective address and unadvanced EIP. Parenthesize as '(m&7)==6' to match getecommon16.
---
 src/emu/modrm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/emu/modrm.h b/src/emu/modrm.h
index d0892a8a4..e021464ba 100755
--- a/src/emu/modrm.h
+++ b/src/emu/modrm.h
@@ -108,7 +108,7 @@
             case 7: base =      R_BX; break;    \
         }                                       \
         switch((m>>6)&3) {                      \
-            case 0: if(m&7==6) base = F16S; break; \
+            case 0: if((m&7)==6) base = F16S; break; \
             case 1: base += F8S; break;         \
             case 2: base += F16S; break;        \
         }                                       \