build: arm target support

public/mathlib/mathlib.h

@@ -458,11 +458,7 @@ void inline SinCos( float radians, float *sine, float *cosine )
 	*sine = sin( radians );
 	*cosine = cos( radians );
 #elif defined( POSIX )
-	double __cosr, __sinr;
-	__asm ("fsincos" : "=t" (__cosr), "=u" (__sinr) : "0" (radians));
-
-  	*sine = __sinr;
-  	*cosine = __cosr;
+	sincosf(radians, sine, cosine);
 #endif
 }
 
@@ -1217,6 +1213,8 @@ FORCEINLINE int RoundFloatToInt(float f)
 	};
 	flResult = __fctiw( f );
 	return pResult[1];
+#elif defined (__arm__)
+        return (int)(f + 0.5f);
 #else
 #error Unknown architecture
 #endif
@@ -1247,8 +1245,9 @@ FORCEINLINE unsigned long RoundFloatToUnsignedLong(float f)
 	Assert( pIntResult[1] >= 0 );
 	return pResult[1];
 #else  // !X360
-	
-#if defined( PLATFORM_WINDOWS_PC64 )
+#ifdef __arm__
+        return (unsigned long)(f + 0.5f);
+#elif defined( PLATFORM_WINDOWS_PC64 )
 	uint nRet = ( uint ) f;
 	if ( nRet & 1 )
 	{