- 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/r_main.cpp

@@ -326,9 +326,7 @@ angle_t R_PointToAngle2 (fixed_t x1, fixed_t y1, fixed_t x, fixed_t y)
 	else
 	{
 		// we have to use the slower but more precise floating point atan2 function here.
-		// (use quickertoint to speed this up because the CRT's conversion is rather slow and
-		//  this is used in time critical code.)
-		return quickertoint((float)(atan2f(float(y), float(x)) * (ANGLE_180/M_PI)));
+		return xs_RoundToUInt(atan2(double(y), double(x)) * (ANGLE_180/M_PI));
 	}
 }
 
@@ -534,7 +532,7 @@ void R_SetVisibility (float vis)
 		return;
 	}
 
-	r_BaseVisibility = toint (vis * 65536.f);
+	r_BaseVisibility = xs_RoundToInt(vis * 65536.f);
 
 	// Prevent overflow on walls
 	if (r_BaseVisibility < 0 && r_BaseVisibility < -MaxVisForWall)