From 4ae5f2e298c41ff0cf8aeba567b55a6acba825db Mon Sep 17 00:00:00 2001
From: terminx <terminx@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Fri, 23 Jun 2017 03:58:36 +0000
Subject: [PATCH] Remove "BUILD_NOP6", old cruft for running on ancient x86
 processors without MMX.

git-svn-id: https://svn.eduke32.com/eduke32@6229 1a8010ca-5511-0410-912e-c29ae57300e0
---
 source/build/src/a-c.cpp    |  2 --
 source/build/src/engine.cpp | 12 ++++--------
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/source/build/src/a-c.cpp b/source/build/src/a-c.cpp
index 8df96c7ab..d3b1fe393 100644
--- a/source/build/src/a-c.cpp
+++ b/source/build/src/a-c.cpp
@@ -718,8 +718,6 @@ void stretchhline(intptr_t p0, int32_t u, bssize_t cnt, int32_t uinc, intptr_t r
 }
 #endif
 
-void mmxoverlay() { }
-
 #endif
 /*
  * vim:ts=4:
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index f74a8b686..0ab314bca 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -124,7 +124,7 @@ static const int32_t nytoofar = DISTRECIPSIZ*16384ull - 1048576;
 static uint32_t *distrecip;
 
 static int32_t *lookups = NULL;
-static int32_t dommxoverlay = 1, beforedrawrooms = 1;
+static int32_t beforedrawrooms = 1;
 
 static int32_t oxdimen = -1, oviewingrange = -1, oxyaspect = -1;
 
@@ -7651,13 +7651,9 @@ int32_t preinitengine(void)
     spritesmooth = spritesmooth_s;
 #endif
 
-    if ((e = Bgetenv("BUILD_NOP6")) != NULL)
-        if (!Bstrcasecmp(e, "TRUE"))
-        {
-            Bprintf("Disabling P6 optimizations.\n");
-            dommxoverlay = 0;
-        }
-    if (dommxoverlay) mmxoverlay();
+#if !defined ENGINE_USING_A_C
+    mmxoverlay();
+#endif
 
     validmodecnt = 0;
     getvalidmodes();