Cleanup.

include/bx/inline/math.inl

@@ -96,23 +96,14 @@ namespace bx
 		return tmp == UINT64_C(0x7ff0000000000000);
 	}
 
-	inline float forceEval(float _a)
-	{
-		volatile float result = _a;
-		return result;
-	}
-
 	inline BX_CONSTEXPR_FUNC float floor(float _a)
 	{
 		if (_a < 0.0f)
 		{
 			const float fr = fract(-_a);
-			const float result = forceEval(-_a - fr);
+			const float tr = trunc(-_a);
 
-			return -(0.0f != fr
-				? result + 1.0f
-				: result)
-				;
+			return -tr - float(0.0f != fr);
 		}
 
 		return _a - fract(_a);