From 5cd17bb293711be65936832eefd5fa575f423bef Mon Sep 17 00:00:00 2001
From: qeeg <mszoopers@protonmail.com>
Date: Wed, 2 Jun 2021 15:25:21 -0500
Subject: [PATCH] Port over MDK2 fade-in fix from PCem

---
 src/cpu/x87_ops_misc.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cpu/x87_ops_misc.h b/src/cpu/x87_ops_misc.h
index c902d12c8..ba5e37f7a 100644
--- a/src/cpu/x87_ops_misc.h
+++ b/src/cpu/x87_ops_misc.h
@@ -679,7 +679,8 @@ static int opFSCALE(uint32_t fetchdat)
         FP_ENTER();
         cpu_state.pc++;
         temp64 = (int64_t)ST(1);
-        ST(0) = ST(0) * pow(2.0, (double)temp64);
+        if(ST(0) != 0.0)
+                ST(0) = ST(0) * pow(2.0, (double)temp64);
         FP_TAG_VALID;
         CLOCK_CYCLES((fpu_type >= FPU_487SX) ? (x87_timings.fscale) : (x87_timings.fscale * cpu_multi));
         return 0;