From d2fc3ad2272f7cc850ef95fbe803c10e8746ad86 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sat, 2 Oct 2021 21:34:32 +0200
Subject: Switched to long doubles instead of doing manual FPU manipulation

---
 Stars45/StarSystem.cpp | 35 +++++++----------------------------
 1 file changed, 7 insertions(+), 28 deletions(-)

(limited to 'Stars45/StarSystem.cpp')

diff --git a/Stars45/StarSystem.cpp b/Stars45/StarSystem.cpp
index 8daed31..3c91f99 100644
--- a/Stars45/StarSystem.cpp
+++ b/Stars45/StarSystem.cpp
@@ -54,34 +54,17 @@
 #include "Scene.h"
 #include "ParseUtil.h"
 
-const double epoch = 0.5e9;
-double StarSystem::stardate = 0;
+const long double epoch = 0.5e9;
+long double StarSystem::stardate = 0;
 
 // +====================================================================+
 
-static double base_time = 0;
+static long double base_time = 0;
 static WORD   oldcw = 0;
 static WORD   fpcw  = 0;
 
-void FPU2Extended()
+void StarSystem::SetBaseTime(long double t, bool absolute)
 {
-    _asm { fstcw oldcw }
-    fpcw = oldcw | 0x0300;  // set 80-bit precision mode
-    _asm { fldcw fpcw }
-}
-
-void FPURestore()
-{
-    // well, I don't actually WANT single-precision mode
-    // so I think I'll just ignore this...
-
-    //_asm { fldcw oldcw }
-}
-
-void StarSystem::SetBaseTime(double t, bool absolute)
-{
-    FPU2Extended();
-
     if (absolute) {
         base_time = t;
         CalcStardate();
@@ -94,7 +77,7 @@ void StarSystem::SetBaseTime(double t, bool absolute)
     }
 }
 
-double StarSystem::GetBaseTime()
+long double StarSystem::GetBaseTime()
 {
     return base_time;
 }
@@ -111,14 +94,10 @@ void StarSystem::CalcStardate()
         base_time += epoch;
     }
 
-    FPU2Extended();
-
-    double gtime = (double) Game::GameTime() / 1000.0;
-    double sdate = gtime + base_time + epoch;
+    long double gtime = (long double) Game::GameTime() / 1000.0;
+    long double sdate = gtime + base_time + epoch;
 
     stardate = sdate;
-
-    FPURestore();
 }
 
 static const double GRAV    = 6.673e-11;
-- 
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