From ab154faf88ace1bba5503d1b20d6796f6a2f0852 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Thu, 4 Aug 2022 16:17:55 +0600
Subject: [PATCH] x86: mov r, DR6 now always writes bits 4-11 and bits 16-31 as
 1

---
 src/cpu/x86_ops_mov_ctrl.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cpu/x86_ops_mov_ctrl.h b/src/cpu/x86_ops_mov_ctrl.h
index 667ea9d31..0d973338e 100644
--- a/src/cpu/x86_ops_mov_ctrl.h
+++ b/src/cpu/x86_ops_mov_ctrl.h
@@ -91,7 +91,7 @@ static int opMOV_r_DRx_a16(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_16(fetchdat);
-        cpu_state.regs[cpu_rm].l = dr[cpu_reg];
+        cpu_state.regs[cpu_rm].l = dr[cpu_reg] | (cpu_reg == 6 ? 0xffff0ff0u : 0);
         CLOCK_CYCLES(6);
         PREFETCH_RUN(6, 2, rmdat, 0,0,0,0, 0);
         return 0;
@@ -104,7 +104,7 @@ static int opMOV_r_DRx_a32(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_32(fetchdat);
-        cpu_state.regs[cpu_rm].l = dr[cpu_reg];
+        cpu_state.regs[cpu_rm].l = dr[cpu_reg] | (cpu_reg == 6 ? 0xffff0ff0u : 0);
         CLOCK_CYCLES(6);
         PREFETCH_RUN(6, 2, rmdat, 0,0,0,0, 1);
         return 0;