- Replaced toint/quickertoint with the portable routines from xs_Float.h. The

former used fistp, which is not portable across platforms, so cannot be
  used in the play simulation. They were only suitable for the renderer.
  xs_Float.h also has a very fast float->fixed conversion, so FLOAT2FIXED
  uses that now.
  (And I also learned that the FPU's round to nearest is not the rounding I
  learned in grade school but actually Banker's Rounding. I had no idea.)
  (Also, also, the only thing that could have made quickertoint faster than
  toint was that it stored a 32-bit int. I never timed them, and I doubt in
  practice there was any real difference between the two.)
- Changed atan2f to atan2. Using floats is not a win, because the result is
  returned as a double on the x87 stack, which the caller then needs to cast
  down to a float using fst/fld.

SVN r1990 (trunk)

src/thingdef/thingdef_expression.cpp

@@ -49,6 +49,7 @@
 #include "p_lnspec.h"
 #include "doomstat.h"
 #include "thingdef_exp.h"
+#include "m_fixed.h"
 
 int testglobalvar = 1337;	// just for having one global variable to test with
 DEFINE_GLOBAL_VARIABLE(testglobalvar)